Tag: submarines

If this survey was done correctly, this shows pretty broad support for South Korea to build its own nuclear powered submarines:

Nearly six in 10 Americans support South Korea’s project to develop nuclear-powered submarines, a survey showed Thursday, while a strong majority oppose Seoul acquiring nuclear weapons.

The survey, conducted jointly by the Washington-based Korea Economic Institute of America and data analytics firm YouGov among 1,207 American adults from Aug. 21-Sept. 1, found that 58 percent supported South Korea’s development of nuclear-powered submarines, with 42 percent opposing it.

Support was broadly bipartisan, with 56 percent of self-identifying Democrats and 64 percent of Republicans backing the development of the submarines. Among independents, 62 percent expressed support.

Yonhap

You can read more at the link.

The long awaited nuclear submarine project for South Korea is finally moving forward:

The military has initiated the formal process to acquire nuclear-powered submarines, a Navy document showed Wednesday, amid little progress in security talks with the United States over Seoul’s push for the project.

The Navy recently submitted the document to the Joint Chiefs of Staff (JCS) outlining the need for the program and specifying requirements, such as desired capabilities, the number of systems needed and projected deployment schedules, according to the document provided to Rep. Kang Dae-sik of the main opposition People Power Party.

The U.S. gave approval for South Korea to build nuclear-powered attack submarines and committed to working with Seoul to advance requirements for the project, including avenues to source fuel, under a joint fact sheet released after a summit of the allies’ leaders.

Yonhap

You can read more at the link, but the ROK is planning to build 4 nuclear submarines that should be complete by the mid-to-late 20230’s.

In more submarine news, a ROK firm is going all in to win a contract to build 12 subs for the Canadians:

Hyundai Motor Group Executive Chair Chung Euisun joined a Korean government delegation to assist Korean shipbuilders’ bid to supply patrol submarines for the Royal Canadian Navy.

According to industry and government officials, Chung flew to Canada on Monday to join the delegation comprised of government officials including presidential chief of staff Kang Hoon-sik and Industry Minister Kim Jung-kwan. Hanwha Group Vice Chairman Kim Dong-kwan and Joo Won-ho, head of HD Hyundai Heavy Industries’ (HD HHI) Naval & Special Ship Business Unit, will also join the delegation.

Hanwha Group’s shipbuilding arm, Hanwha Ocean, has formed a consortium with HD HHI to bid on Canada’s Patrol Submarine Project (CPSP), a 60 billion Canadian dollar ($43 billion) program to procure 12 diesel submarines for the Royal Canadian Navy.

Korea Times

You can read more at the link.

Big defense topics being discussed in South Korea:

This photo, provided by the defense ministry, shows Defense Minister Ahn Gyu-back (L) and U.S. Under Secretary of Defense for Policy Elbridge Colby during their meeting at the ministry compound in Seoul on Jan. 26, 2026

Defense Minister Ahn Gyu-back held talks Monday with U.S. Under Secretary of Defense for Policy Elbridge Colby to discuss Seoul’s push to build nuclear-powered submarines, regain wartime operation control of its troops from Washington and other pending security issues. (…….)

Both sides agreed that cooperation on Seoul’s acquisition of nuclear-powered submarines would bolster its capabilities to defend the Korean Peninsula and serve as a key landmark in elevating their alliance to a higher level.

Yonhap

You can read more at the link.

I really do not see a defense need of why the ROK needs a nuclear powered submarines unless the goal is create a future export market for them:

 The presidential office on Thursday welcomed U.S. President Donald Trump’s decision to approve South Korea’s bid to build a nuclear-powered submarine, vowing to closely cooperate with the U.S. throughout the process.

Trump wrote on social media on Thursday that he had given South Korea approval to build a nuclear-powered submarine, adding it will be built at shipyards in Philadelphia.

The approval came a day after President Lee Jae Myung asked Trump to allow South Korea to have nuclear fuel to build nuclear-powered submarines during their summit held in the southeastern city of Gyeongju.

Yonhap

You can read more at the link.

My assessment is that this disclosure of a nuclear powered submarine is more for PR purposes than any actual near term military benefits. This technology is very difficult to master and they are likely many years from having a working prototype. However, like with their nuclear program if nothing is done to reign their program in over a 10-15 year period, they will likely eventually have a working nuclear powered submarine:

North Korean leader Kim Jong-un, third from right, smiles during his visit to a shipyard to inspect nuclear submarine construction in this photo released by the North’s official Korean Central News Agency, Saturday. Yonhap

North Korea has publicly unveiled the construction of a nuclear-powered submarine, a weapons system that could pose a serious security threat to South Korea and allies if successfully developed, due to its ability to operate submerged for months.

On Saturday, Pyongyang’s state-run media, the Korean Central News Agency (KCNA), released photos of leader Kim Jong-un inspecting shipyards focused on constructing warships, including “a nuclear-powered strategic guided missile submarine.”

“Kim stressed the need to make overwhelmingly powerful warships to contain hostile forces’ habitual gunboat diplomacy,” the KCNA reported without disclosing the exact location of the shipyards.

It was the first time that North Korea disclosed the ship’s appearance.

Korea Times

You can read more at the link.

If South Korea develops their own nuclear powered submarines it would not be because of threats from North Korea, but instead preparing for war with China instead:

The chief of the U.S. Indo-Pacific Command has said the introduction of nuclear-powered submarines (SSNs) in South Korea could be considered in the future depending on its operational analysis, the presidential office said Sunday. 

“From the standpoint of submarine warfare, I think it’s important as allies and partners to find the most efficient and effective ways to combine our capabilities in ways that most effectively defend our alliances and partnerships,” Commander Adm. Samuel Paparo said during an interview with the South Korean press Thursday on the runway of the Hickam Air Force Base in Hawaii.

“And if the operational analysis leads us to believe that, then we can move forward at a later date,” he added.

Yonhap

You can read more at the link.

This may be signaling that the ROK may be interested in developing their own nuclear submarines in the future:

Adm. Yang Yong-mo (R), chief of naval operations, poses for a photo with Rear Adm. Thomas Buchanan (L), the commander of Submarine Group 10, which oversees Ohio-class submarines at Naval Submarine Base Kings Bay in Georgia on Feb. 2, 2024, in this photo provided by the South’s Navy on Feb. 4.

South Korea’s top naval officer visited a key naval submarine base in the United States for the first time and stressed the need to strengthen ties against growing North Korean threats, the South’s Navy said Sunday.

Adm. Yang Yong-mo, chief of naval operations, visited the Naval Submarine Base Kings Bay in Georgia, a southeastern coastal base home to key nuclear submarines, on Friday (local time), according to the Navy.

It marks the first time for a South Korean Navy chief to visit the base, which operates nuclear ballistic missile submarines (SSBN), a key U.S. strategic asset. SSBN is a sea-based leg of the U.S. nuclear triad that also includes intercontinental ballistic missiles and strategic bombers.

Yonhap

You can read more at the link.