nuclear

EXPLAINER

Iran and the US clash over nuclear inspections and Hormuz as negotiators push for a final deal within 60 days.

Iran and the United States have offered conflicting accounts of key issues as negotiators work towards a final agreement within a 60-day window. Differences remain over nuclear oversight and the implementation of any deal, underscoring the challenges facing both sides.

US Secretary of State Marco Rubio said Iran would not be allowed to charge tolls in the Strait of Hormuz under a final agreement, stressing that the strategic waterway must remain open to international shipping.

Meanwhile, Iran rejected US claims that it had agreed to allow nuclear inspectors back into the country after President Donald Trump said Tehran had accepted the “highest level” of monitoring. The conflicting statements highlight the gaps that negotiators are still trying to bridge.

Here is what has happened:

In Iran

• Iran’s military shifts to ‘offensive doctrine’: General Ahmad Reza Pourdastan, head of Iran’s Army Strategic Studies and Research Center, said Tehran has moved away from a purely defensive posture and now includes preemptive operations in its military strategy. Quoted by the semi-official Fars news agency, Pourdastan said Iran could “severely surprise the enemy” if national interests required it and added that much of the country’s military capability has yet to be used.
• Iran says no IAEA inspections planned: Tohid Asadi, reporting from the Strait of Hormuz, says the Iranian Foreign Ministry spokesperson Esmaeil Baghaei has denied reports of a meeting with International Atomic Energy Agency (IAEA) chief Rafael Grossi and said there are currently no plans for visits or inspections by the UN nuclear watchdog. Baghaei said Iran’s dealings with the IAEA would be governed by existing procedures, its safeguards obligations, parliamentary legislation and decisions by the Supreme National Security Council. Iran suspended cooperation with the IAEA after US and Israeli strikes on its nuclear facilities in June 2025, and while diplomacy continues under a 60-day framework, Tehran says it has not granted permission for inspectors to return.

War diplomacy:

• ‘No way’ US and Iran can finalise deal in 60 days, analyst says: Charles Kupchan, a senior fellow at the Council on Foreign Relations, told Al Jazeera there is “no way” Washington and Tehran can complete a final agreement within the 60-day timeframe repeatedly cited by President Donald Trump. “I think we’re talking about at least into the next calendar year,” he said, adding that he would not be surprised if both sides simply “run out the clock” by continuing negotiations and keeping the Strait of Hormuz open without reaching a final deal before the end of Trump’s presidency.
• Qatar says LNG production could return to normal within weeks: Prime Minister Sheikh Mohammed bin Abdulrahman bin Jassim Al Thani told the Financial Times that Qatar is preparing to restore normal liquefied natural gas (LNG) production after the interim US-Iran deal. Qatar, the world’s second-largest LNG producer, halted output in March following an Iranian drone attack on the Ras Laffan facility. Sheikh Mohammed said most production could resume within weeks, except at the damaged site, adding that QatarEnergy would only lift its force majeure declaration once it is satisfied that all safety and operational concerns have been addressed.

In the Gulf:

• Rubio ‘trying to sell the deal’ with Iran on Gulf tour: Alan Fisher, reporting from Washington, DC, said US Secretary of State Marco Rubio is visiting the United Arab Emirates, Kuwait and Bahrain, three Gulf countries seen as having been among the most affected by the war with Iran. Rubio, who also serves as Trump’s national security adviser, is expected to reassure regional allies that US security commitments remain intact. He will also address the Gulf Cooperation Council in Bahrain, where he is “really trying to sell the deal”, amid concerns over Washington’s response to Iranian attacks.

In the US

• US Senate approves resolution to curb Trump’s war powers on Iran: The Senate voted 50-48 to pass a measure requiring congressional approval for further US military action against Iran, marking the first time a war powers resolution on the conflict has cleared both chambers of Congress. Four Republicans – Bill Cassidy, Lisa Murkowski, Susan Collins and Rand Paul – joined nearly all Democrats in backing the measure, while Pennsylvania Democrat John Fetterman voted against it. The resolution is expected to face a veto from President Trump.

In Israel

• US ‘very naive’ on Iran, Ben-Gvir says: Israeli National Security Minister Itamar Ben-Gvir said the US would be “very naive” if it believed Iran would abandon its nuclear programme, and hinted that Israel may act independently against Tehran. “It is Israel’s responsibility to confront this Iranian threat and act against it alone,” he told Israel’s Channel 7, adding that “no circumstances” could force Israel to act “according to the dictates of a friend, even if that friend is truly great”. His remarks come amid reported tensions between Washington and Tel Aviv over Israel’s attacks on Lebanon and ongoing US-Iran negotiations. Last week, US Vice President JD Vance publicly criticised Israeli cabinet ministers for “attacking” Washington, calling the US Israel’s “only powerful ally” left in the world.

In Lebanon

• UN says ceasefire ‘largely holding’ in southern Lebanon: The United Nations said the ceasefire in southern Lebanon appears to be “largely holding”, although peacekeepers continue to observe Israeli military ground and air activity. UN spokesperson Stephane Dujarric said UNIFIL troops witnessed “heavy” machine-gun fire and three tank rounds fired by Israeli forces near Biyyada on Monday, while drones were also seen “apparently to monitor UNIFIL peacekeepers”. The incident came a day after peacekeepers reported the first day without exchanges of fire since fighting escalated on March 2. The UN urged all sides to “adhere fully to the ceasefire and refrain from any escalation, particularly during this delicate period of ongoing negotiations”.

Several key issues remain as sticking points in US-Iran talks, including maritime security and nuclear oversight.

SEOUL, June 23 (UPI) — North Korean leader Kim Jong Un called for accelerating the expansion of North Korea’s nuclear forces, citing increasingly hostile military cooperation between Seoul and Washington and an unstable global security environment, state media reported Monday.

Kim led a plenary meeting of the Ninth Central Committee of the ruling Workers’ Party of Korea from Saturday through Monday to review progress on national goals for the first half of the year and outline priorities for the remainder of 2026, according to the official Korean Central News Agency.

The meeting reaffirmed Pyongyang’s commitment to strengthening and expanding its nuclear forces, describing them as “the core of the military sovereignty of the country” and the foundation of its war deterrent.

“To thoroughly exercise the position of a nuclear weapons state is the most correct and unique way to actively and confidently cope with the unpredictable international military and political situation,” KCNA said.

North Korea passed a law declaring itself a nuclear-armed state in 2022. Kim later amended the country’s constitution to enshrine the permanent growth of its nuclear arsenal, calling the status “irreversible.”

The remarks come weeks after Kim toured a newly inaugurated nuclear fuel production facility and vowed to continue expanding the country’s fissile material at an “exponential rate.”

In an address to the meeting, Kim said it was necessary to bolster North Korea’s defense capabilities in response to an increasingly volatile international environment.

“Wars, bloodshed and political and economic instabilities are becoming a daily occurrence in the world due to the gangster-like and unlimited geopolitical greed and misuse of strength,” Kim said, according to KCNA.

The North Korean leader criticized the U.S.-South Korea military alliance, citing regular joint military exercises and Seoul’s pursuit of a nuclear-powered submarine.

Kim also singled out the allies’ Nuclear Consultative Group, which met in Seoul earlier this month, calling it a “nuclear war body” and accusing Washington and Seoul of developing plans for a nuclear strike against North Korea.

He further accused Japan of transforming itself into a “war state” and warned that military buildups in Northeast Asia were heightening regional tensions.

In addition to expanding the country’s nuclear program, Kim outlined broader military modernization goals, including construction of a 10,000-ton strategic guided missile cruiser, expansion of munitions production and the development of new naval facilities. He also called for completing ongoing efforts to harden the border with South Korea.

The remarks come as North Korea continues extensive fortification work near the Military Demarcation Line inside the DMZ, including the installation of barbed-wire fencing and preparations for mine-laying operations.

South Korea’s Defense Ministry on Monday called the activity a violation of the armistice agreement that ended fighting in the 1950-53 Korean War.

North Korea has revised its constitution to remove all references to reunification with South Korea, formalizing Kim’s push to redefine inter-Korean ties as relations between two separate states.

“In particular, it is essential to thoroughly adhere to the principle of struggle against the enemy set forth by our party which defined the ROK as the most hostile state,” Kim said, using the official acronym for South Korea.

The remarks underlined Pyongyang’s continued rejection of South Korean President Lee Jae Myung’s outreach efforts since taking office last year.

Last week, Lee said he discussed North Korea with U.S. President Donald Trump during the Group of Seven summit in France, arguing that sanctions had failed to halt Pyongyang’s nuclear development and suggesting a more phased approach.

Trump met Kim three times during his first term and has repeatedly said he would be open to meeting the North Korean leader again since returning to office.

“President Trump said it was time to pay attention to the North Korea issue again,” Lee said.

June 19 (UPI) — Korea Hydro & Nuclear Power, or KHNP, said Thursday that its CEO Kim Hoe-chun has traveled to the Czech Republic to review progress on the construction of two nuclear reactors in the European country.

The state-backed utility noted that Kim took part in a meeting of the Dukovany Steering Committee in Prague alongside South Korea’s Minister of Trade, Industry and Resources Kim Jung-kwan and Czech Deputy Prime Minister Karel Havlicek.

Kim’s visit is timed with the first anniversary of the signing of an $18 billion contract to build two 1,000-megawatt reactors in Dukovany, located around 120 miles southeast of the Czech capital.

Groundbreaking is targeted for 2029, with commercial completion expected by 2037. The South Korean consortium includes such industrial partners as Daewoo E&C and Doosan Enerbility.

The two sides also discussed ways to strengthen bilateral nuclear cooperation, while companies from the two countries signed an engineering support agreement related to the project, according to KHNP.

Kim also toured the manufacturing facilities of Doosan Skoda Power in Plzen, situated roughly 55 miles west of Prague. The Czech turbine manufacturer owned by the Doosan Group is expected to play a key role in the Dukovany program.

“The Dukovany project is a monumental endeavor that symbolizes the strategic partnership between South Korea and the Czech Republic,” Kim said in a statement.

“We will work closely with the Czech government, the project owner, local communities, and Czech companies to make this project a model for the safest and most successful nuclear power plant construction in the world,” he added.

Al Jazeera’s Dominic Kane explains that the EU won’t lift crucial sanctions on Iran until a formal nuclear agreement is reached. The bloc’s foreign policy chief Kaja Kallas also clarified that human rights-related sanctions will continue regardless.

June 18 (UPI) — Korea Hydro & Nuclear Power said Thursday that it has selected two sites in the country’s southeastern region for the construction of three new nuclear reactors over the next decade.

The state-backed utility noted that its committee, comprising outside experts, chose Yeongdeok County, located about 185 miles southeast of Seoul, and Gijang County, roughly 200 miles southeast of the capital, after a year-long evaluation process.

Yeongdeok County will host two 1.4-gigawatt large-scale nuclear reactors, while Gijang County will be home to a 0.7-gigawatt small modular reactor, or SMR, according to KHNP. Two local governments competed for each project.

Earlier this year, the Ministry of Climate, Energy and Environment said that it aims to secure construction approval for the three reactors in the early 2030s and bring them online by 2037 and 2038.

The incumbent administration was initially skeptical about building additional nuclear plants but later changed its stance as electricity demand surged amid the AI boom and the rapid expansion of data centers.

As of the end of last year, KHNP operated 26 nuclear reactors across South Korea and was building four additional units. Currently, nuclear power accounts for around one-third of the nation’s energy mix.

“We extend our gratitude to all local governments and residents who showed such passionate interest in hosting the projects, and we express our sincere regret to the regions that were not selected,” KHNP said in a statement.

The utility added that residents’ opinions gathered during the selection process, including both support for and opposition to nuclear development, would be reflected in future cooperation plans with local communities.

KHNP is not publicly listed.

US President Donald Trump has accused his predecessor Barack Obama of ‘bribing’ Iran to agree to the 2015 nuclear agreement, by referring to a $1.7B settlement of a decades-old lawsuit. He used profanity in his brief comments to the media alongside Egyptian President Abdel Fattah el-Sisi.

US President Donald Trump says Iran has agreed to not acquire nuclear weapons and will ‘suffer unbelievable consequences’ if they do. His remarks came during a meeting with Qatar’s Emir Sheikh Tamim at the G7 summit in France.

IAEA chief Rafael Grossi said Iran-US nuclear talks were in a ‘complicated phase’ and dialogue with Iran ‘broken’ as Iran and Israel traded fire on Monday, the worst escalation since a ceasefire was reached in April.

June 5 (Asia Today) — South Korea’s presidential office said Friday there has been no major change in the plan to build nuclear-powered submarines in South Korea as Seoul and Washington resume talks on nuclear cooperation and wartime operational control.

A senior Cheong Wa Dae official told reporters that recent security talks between South Korea and the United States were “very productive and useful.”

“There has been no major change in the position that nuclear-powered submarines will be built in South Korea,” the official said.

The official said the two sides discussed uranium enrichment, spent fuel reprocessing and nuclear-powered submarines. The talks also included what the official described as an “umbrella” consultation framework.

“We have not set a target deadline, but we will move quickly and try to produce concrete results by the end of the year,” the official said.

South Korea and the United States held formal talks in Seoul this week on follow-up discussions related to Seoul’s push for nuclear-powered submarines and expanded rights for uranium enrichment and spent fuel reprocessing. The talks followed earlier bilateral agreements on nuclear cooperation and submarine development.

On enrichment and reprocessing, the senior official said Seoul and Washington need “several new frameworks of agreement.”

“We intend to make progress, including by revising what needs to be revised,” the official said.

The official said talks on enrichment and reprocessing are now moving into a full-fledged phase.

“These discussions are based on trust in South Korea’s denuclearization, so there are no additional denuclearization conditions,” the official said.

Asked about coordination between Seoul and Washington on the timing of South Korea’s recovery of wartime operational control, the official said the two allies do not have a significant difference of opinion.

“Efforts to meet the conditions have continued for more than 10 years, and several years ago there was even an assessment that the conditions had been more than 90% met,” the official said. “Because there is little difference in views on the conditions, we can coordinate and align them.”

The official said the two sides also do not differ sharply on the timing of the transfer.

“There is a gap of a little over a year, about one year-plus,” the official said. “We do not see that gap as something that cannot be adjusted.”

— Reported by Asia Today; translated by UPI

© Asia Today. Unauthorized reproduction or redistribution prohibited.

Original Korean report: https://www.asiatoday.co.kr/kn/view.php?key=20260605010001877

WASHINGTON — Secretary of State Marco Rubio said Tuesday that he is optimistic about the potential for a resumption in nuclear talks with Iran despite a shaky ceasefire in the war that is looking increasingly in doubt.

Rubio defended the Trump administration’s approach to Iran and other global hot spots in back-to-back hearings before the Senate Foreign Relations Committee and a House Appropriations subcommittee. He was briefly disrupted by protesters at each session.

In his first public testimony since the Iran war began at the end of February, Rubio said the Iranians have agreed to negotiate on nuclear points that they had not been willing to address in the past but would not offer an assessment on what those talks might produce.

“They have agreed to negotiate aspects of their nuclear program that just a month ago, just a year ago, they were refusing to even mention,” Rubio told the Senate. He noted, however, that there was no guarantee “it will lead to a deal that’s acceptable” and that negotiations have been made difficult by the instability of Iran’s leadership.

Rubio’s optimism ran counter to pessimistic reports from two semiofficial Iranian news agencies that Iran has stopped communicating with mediators after Israel threatened to bomb Beirut as it fights the Hezbollah militant group. President Trump disputed that Iran has cut off communication with mediators, calling Iranian reports of a cessation in talks “false and erroneous.”

Democrats criticize Trump administration’s approach to Iran, and Rubio defends it

Rubio’s wide-ranging testimony was met with fierce objections from Democrats, including tough questions about the status of U.S. foreign assistance to respond to diseases such as the Ebola outbreak in Africa. Rubio insisted that the dismantlement of the U.S. Agency for International Development had not affected Washington’s ability to assist with global humanitarian responses.

Sen. Chris Van Hollen (D-Md.) blasted Rubio and Trump for foreign aid cuts and overseas intervention. Van Hollen specifically took aim at the U.S. and Israeli decision to strike Iran, accusing the Republican president of entering the war on behalf of Israel.

Israeli Prime Minister Benjamin Netanyahu “said he’s been waiting 40 years to do this,” Van Hollen said. “It turns out he finally found a president who was both stupid and reckless enough to join him. Let’s face it, Mr. Secretary, the Trump foreign policy has become a dumpster fire.”

Rubio’s testimony, which was taking place as Israel and Lebanon began a new round of political talks at the State Department with the situation between Israel and Hezbollah still uncertain, did not provide definitive answers on any of the main questions of the day.

He said Iran is not guaranteed a massive payout for reopening the Strait of Hormuz, the crucial waterway for global oil shipments, and would have to commit to further concessions on its nuclear program to get significant sanctions relief.

“The more they give, the more they would get,” he said, later adding, “They’re not going to get it as a signing bonus.”

Rubio also said there are indications that Iran’s new supreme leader, Mojtaba Khamenei, is taking a bigger part in the discussions despite not being seen publicly since the war began.

“I think there are indications out there that he is increasingly engaging at some level, although all of his communications have been in writing and through intermediaries,” he said.

Democratic senator says drugs being on boats isn’t a targeting criterion for U.S. strikes

On other issues, Rubio dismissed questions about the legality of Pentagon strikes against dozens of alleged drug-smuggling vessels in the Caribbean Sea and the eastern Pacific Ocean, which have killed more than 200 people since early September.

Sen. Tim Kaine (D-Va.) said the military’s targeting criteria for those strikes does not include drugs being present on the boat. He called it “odd” but said he could not share much more because the criteria are classified.

Rubio pushed back, saying every strike has a legal officer who makes a determination on whether a strike is legal. He also said the U.S. military has “walked away from strikes” multiple times because they did not meet the targeting criteria.

The Trump administration says the U.S. is at war with drug cartels, while many Democrats have questioned the legality and effectiveness of the strikes.

The Republican former senator faces a second congressional hearing Tuesday and a pair of others Wednesday about the State Department’s annual budget request, though questions have mostly focused on top foreign policy issues.

Rubio wades into Taiwan arms sales opposed by China

Rubio acknowledged that the Trump administration is holding up a new potential $14-billion arms sale to Taiwan but said it remained under consideration and would not be canceled. He noted that the U.S. recently sold arms to Taiwan in December worth $11 billion.

He said the deal is not under review because of pressure from China, although he said the Chinese bring up the issue in discussions with the United States. Trump also has described it as a great negotiating chip.

“They are constantly talking about Taiwan arms sales, but that in no way is what is holding up our decision-making or the White House’s decision-making,” Rubio said. “It is something the president will have to decide on the timing of when and how that is executed on.”

Protesters chant at Rubio about Cuba

Rubio, the son of Cuban immigrants, also was questioned about the Trump administration’s escalatory behavior toward Cuba, as Trump has hinted that the small island country could be the next U.S. target after operations in Iran are wrapped up.

He faced chants from protesters who urged him to “stop killing Cubans” when he entered the Senate briefing room. The protesters were quickly pulled from the room. Their chants also included “Let Cuba live!”

Rubio defended the administration’s approach to Cuba and said it would remain focused on changing the Cuban government’s policies.

“I really don’t believe this system is capable of reform unless new people take over or a new mindset takes hold,” he said.

Despite a series of meetings between U.S. and Cuban officials, Trump and Rubio have renewed threats against the island’s government, which take on greater weight following the administration’s announcement of criminal charges against former President Raúl Castro.

Over his congressional career and now as America’s top diplomat, Rubio has maintained that Cuba is a national security threat due to its ties to U.S. adversaries, and that Trump is intent on addressing it.

Amiri, Lee and Finley write for the Associated Press. Amiri reported from New York.

June 2 (UPI) — Secretary of State Marco Rubio told the Senate on Tuesday morning that Iran must reopen the Strait of Hormuz and commit to future talks on its nuclear program before the United States will make concessions.

He testified before the Senate Foreign Relations Committee before a scheduled afternoon meeting with a House panel on State Department spending. Both sessions were planned so that Rubio could defend the department’s nearly $36 million budget request for the 2027 fiscal year.

Rubio is also President Donald Trump‘s national security adviser.

The Washington Post reported that Rubio’s testimony with lawmakers has been mostly friendly. He served in the Senate for 14 years and in the House for 8, representing Florida.

Lawmakers from both sides of the aisle have expressed frustration with the cost and potential political fallout from the war with Iran.

“This war and the administration’s decision to blockade has now held the entire world economy, and the U.S. economy, hostage to the ability to negotiate an agreement with Iran,” said Sen. Chris Murphy, D-Conn, The Post reported.

The Strait of Hormuz, which has been closed by Iran since late February, must reopen, Rubio stressed. The strait is a critical waterway for shipping of much of the world’s oil, gas and fertilizer. The closure has caused gas prices to rise, causing anxiety as Republicans fear losing House and Senate seats in November.

Rubio said Trump demands that Iran enter into negotiating “severe and long-term limitations” on its nuclear program, including disposing of enriched uranium, and those talks could take months.

But he said he’s optimistic that Iran is more willing to negotiate on nukes.

“They have agreed to negotiate aspects of their nuclear program that just a month ago, just a year ago, they were refusing to even mention,” The Guardian reported Rubio said. He warned that it’s “not a guarantee that ultimately it will lead to a deal that’s acceptable,” and Iran’s leadership instability has made the negotiations more difficult.

Rubio said Iran had intended to use its conventional weapons capabilities as a “shield” to protect its nuclear program, The Guardian reported.

“What they tried to do is, they were going to try to build a conventional shield and hide behind that conventional shield,” he said, explaining why Trump wanted to start the war.

He also admitted, after questioning by Sen. Ted Cruz, R-Texas, that another sticking point for Trump was that Iran stop supporting terrorist proxy groups. He said Trump is not willing to ease sanctions just for opening the strait.

Rubio said that Iranian Ayatollah Mojtaba Khamenei is believed to be alive.

“I would imagine, given what’s happened to multiple leaders in that system, being very public is probably not something that’s recommended for them internally,” he said. “But that said, I think there are indications out there that he is increasingly engaging at some level, although all of his communications have been in writing and through intermediaries.”

Along with Iran, lawmakers were expected to ask Rubio about the president’s comments about Cuba and Taiwan.

IAEA Director General Rafael Grossi says the 2015 Iran nuclear deal is no longer a workable model. Iran’s nuclear technology and capabilities have advanced significantly, and any future agreement must reflect today’s realities, including the impact of the recent conflict.

South Korea has confirmed plans to develop a new class of nuclear-powered submarines under the Jang Bogo N Project. These will put South Korea in an exclusive class of nations operating nuclear-powered subs, with currently only China, France, India, Russia, the United Kingdom, and the United States having them in active service. The move has larger implications than providing the Republic of Korea Navy (ROKN) with just more capable submarines.

South Korea’s Ministry of National Defense (MND) today published a document, the Basic Plan for the Development of Nuclear-Powered Submarines in the Republic of Korea, that sets out its ambition for a major advance in the country’s naval capabilities. The name of the program alludes to South Korea’s first submarine, the Jang Bogo class.

The MND has presented the thinking behind its nuclear-powered sub plans, noting that the vessels will offer “dramatically enhanced operational capabilities” compared to the ROKN’s existing diesel submarines. As well as their functionally unlimited range, the MND says the new nuclear-powered submarines will offer “higher mobility” than their predecessors, which pairs with nuclear submarines’ abilities to travel farther, and do so faster, as well as their underwater agility, at least in certain performance envelope areas.

The ministry also outlines that the new submarines “will play a core role in responding to threats such as North Korea’s submarine-launched nuclear and missile threats.”

“The Republic of Korea will transparently and firmly fulfill its nuclear non-proliferation obligations based on the trust of the international community,” the MND adds.

Clearly, this is a long-term program, with it being Seoul’s first venture into nuclear propulsion for a military application, although it does develop reactors for civilian purposes, which could be leveraged for such work.

The defense ministry expects that the construction process will take up to 10 years, after which the boats will be operated for more than 30 years.

A precise timeline has not been released, and it is also unclear how many hulls are expected to be built.

Back in October last year, TWZ reported on a key milestone toward the program launch, when U.S. President Donald Trump announced that he’d signed off on the plan.

“Our Military Alliance is stronger than ever before and, based on that, I have given them approval to build a Nuclear Powered Submarine, rather than the old fashioned, and far less nimble diesel powered submarines that they have now,” Trump wrote in a post on Truth Social.

The U.S. leader also claimed that at least some of the boats would be built in the United States. The MND hasn’t mentioned this possibility, and the wording of its announcement stresses the sovereign nature of the program and local industrial participation. However, with South Korean firms already building ships in Philadelphia and the United States needing more nuclear shipbuilding capacity, this dynamic could also come into play as a result of the Jang Bogo N Project.

Collapse of U.S. shipbuilding poses national and economic security risks | 60 Minutes

Before Trump’s remarks, South Korea had been open about its nuclear-powered submarine ambitions for years. In fact, related discussions date back to at least around 2003.

However, the plans long faced pushback, including from the United States, especially over nuclear proliferation concerns.

The ROKN already operates a sizable diesel-electric submarine force made up of 12 Jang Bogo class boats, nine Sohn Won-yil class submarines, and three Dosan Ahn Changho class vessels — these are also referred to under the Korean Submarine (KSS) nomenclature, being the KSS-I, KSS-II, and KSS-III, respectively.

The Jang Bogo and Sohn Won-yil classes are based on the German Type 209 and Type 214 designs, respectively, while the Dosan Ahn Changho class is a fully South Korean design.

Last year, South Korea also launched the first of three planned Jang Yeongsil class (KSS-III Batch II) submarines, the nation’s largest and most technologically advanced submarine class so far. You can read more about them here.

Whatever Seoul’s plan is for the production of the new boats, it is still possible, indeed likely, that the United States will provide assistance at least in relation to their propulsion systems.

Last year, South Korea’s defense minister said that South Korea would build its own submarines and modular reactors, but would receive a supply of enriched uranium fuel from the United States. Seoul’s Defense Acquisition Program Administration (DAPA), meanwhile, said that the country was already working on developing small nuclear reactors.

This fuel issue is interesting, bearing in mind that one of the hurdles for the program is a bilateral agreement that prevents it from enriching uranium and reprocessing spent fuel without Washington’s approval. Today’s announcement would suggest that the U.S. government has given the program the green light.

When it comes to the nuclear issue, it’s worth noting that, as it now stands, all nations operating nuclear-powered submarines also field nuclear weapons. Already, however, Australia is moving to acquire nuclear-powered submarines through the trilateral Australia-United Kingdom-United States (AUKUS) defense cooperation agreement. Canberra has no plans for fielding nuclear weapons.

For South Korea, however, there remains a possibility that it may seek to develop a nuclear deterrent, something South Korean officials have talked about in the past, and that we have discussed on many occasions. The primary driver for this is the fact that neighboring North Korea possesses a ballooning nuclear arsenal and a growing number of delivery systems to convey it. Furthermore, it may now be pursuing its own nuclear-powered submarines with assistance from Russia. The degree to which Moscow is providing assistance is unclear, but it may well be propelling the program forward significantly. There is also the factor that, at least in some cases, the United States is not seen globally as the strategic partner it once was. In a South Korean context, Trump has reportedly talked about pulling some U.S. troops out of South Korea.

As a signatory of the Non-Proliferation Treaty (NPT), this would also stand in the way of South Korea acquiring nuclear weapons. Indeed, separate from weapons, the process of building enrichment or other nuclear facilities, or otherwise acquiring the highly enriched fissile material to power the submarines, would be an issue for the NPT.

The Jang Bogo N Project is certainly ambitious, and not just in terms of constructing the boats and securing the fuel required for them.

There will also be enormous investments required to develop suitable infrastructure to sustain a fleet of nuclear-powered subs, as well as training personnel in the operational and maintenance of naval reactors.

Beyond that, there is the question about the degree to which Seoul even needs nuclear-powered submarines. South Korea is already developing conventionally-armed submarine-launched ballistic missiles (SLBM) that can be fired from some of its more modern diesel submarines. These would already offer a conventional second-strike capability to help deter North Korea. The ranges involved in striking North Korean targets hardly need a launch platform with nuclear propulsion.

At the same time, South Korean diesel-electric submarine technology already outstrips North Korea’s limited anti-submarine warfare capabilities.

South Korea Test Launches Ballistic Missile From Submarine

On the other hand, while South Korea’s new diesel-electric subs offer a conventional quasi-second strike capability, it is not anywhere comparable to a true strategic nuclear second-strike deterrent of the kind that highly survivable nuclear-powered boats could provide, if South Korea one day chooses to go nuclear. Even with just conventional ballistic missiles aboard, the ability of a nuclear submarine to disappear out to sea for long periods is unmatched, which would enhance the survivability of the boats and their missiles, and help the credibility of a far more limited conventional second strike deterrent.

Beyond the North Korean threat, the nuclear-powered submarine program promises boats with extreme endurance and a higher level of underwater performance that can range much farther afield, reflecting Seoul’s growing focus on a broader regional security picture. With this in mind, it’s clear that the Jang Bogo N Project is also directed against the threat posed by China. Beijing’s military capabilities are a growing concern for South Korea, a fact reflected in Seoul looking increasingly toward security challenges beyond the peninsula. 

In an underwater warfare context, China maintains a very large submarine force that includes diesel-electric and nuclear-powered types, and which it continues to expand in both size and capability.

The Chinese government has also previously spoken out against South Korea’s nuclear-powered submarine plans, calling for Seoul and the U.S. “to fulfill their nuclear non-proliferation obligations and do things to promote regional peace and stability, and not the other way around,” according to Reuters.

South Korea’s burgeoning submarine plans underscore how quickly its naval ambitions in general are evolving from coastal defense to a far more capable regional deterrent force, and one that will increasingly be able to undertake long-duration bluewater operations.

With the Jang Bogo N Project now underway, the ROKN can look forward to fielding its most advanced vessels yet. Depending on final plans for the production of these boats, it may well also cement its position as one of the few countries capable of designing and building nuclear-powered vessels. At the very least, it should put yet another piece in place should South Korea decide it needs a true second-strike strategic nuclear deterrent.

Contact the author: thomas@thewarzone.com

May 29 (Asia Today) — South Korea and the United States will hold their first meeting in Seoul next week to discuss security issues agreed to at last year’s bilateral summit, including South Korea’s acquisition of nuclear-powered submarines.

South Korea’s Foreign Ministry said Friday the two sides will hold a launch meeting June 2-3 in Seoul for follow-up consultations on the security provisions of the joint fact sheet issued after the summit.

The meeting will come eight months after the two leaders announced agreements in the security section of the joint fact sheet in October.

The two sides are expected to discuss specific measures related to South Korea’s construction of nuclear-powered submarines, as well as expanded authority over uranium enrichment and spent nuclear fuel reprocessing.

With U.S. midterm elections scheduled for November, negotiations in individual areas are expected to gain momentum.

South Korea will send an interagency delegation led by First Vice Foreign Minister Park Yoon-joo. Officials from the presidential National Security Office, Foreign Ministry, Defense Ministry, Ministry of Climate and Energy, Ministry of Science and ICT, Ministry of Trade, Industry and Resources and Nuclear Safety and Security Commission will also attend.

The U.S. delegation will be led by Allison Hooker, under secretary of state for political affairs. Officials from the White House National Security Council, State Department, Energy Department and War Department are expected to travel to Seoul for the talks.

— Reported by Asia Today; translated by UPI

© Asia Today. Unauthorized reproduction or redistribution prohibited.

Original Korean report: https://www.asiatoday.co.kr/kn/view.php?key=20260529010008720

Iran is ready to reassure the international community that it is not pursuing nuclear weapons or instability in the region, President Masoud Pezeshkian said on Sunday, Anadolu reports.

“Prior to the martyrdom of Ayatollah (Ali) Khamenei, Iran’s late Leader, we declared — and we reiterate now — that we are ready to assure the world we do not seek nuclear weapons,” Pezeshkian said in remarks carried by state-run news agency IRNA.

“It is rather Tel Aviv that is driving regional instability,” he said, accusing Israel of pursuing a vision of “Greater Israel.”

Iranian negotiators will never compromise on the country’s “honor and dignity,” added Pezeshkian.

His remarks came a day after US President Donald Trump on Saturday said an agreement with Iran to end the war was “largely negotiated” and awaited finalization.

Regional tensions have escalated since the US and Israel launched strikes against Iran in February. Tehran retaliated with strikes targeting Israel as well as US allies in the Gulf, along with the closure of the Strait of Hormuz.

A ceasefire took effect on April 8 through Pakistani mediation and was later extended by Trump indefinitely.

READ: Iran shoots down Israeli spy drone in country’s south: Report