Nuclear Consultative Group Definition

Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

A bilateral US–South Korea body established in 2023 to coordinate on nuclear deterrence, contingency planning, and the role of US strategic assets on the Korean Peninsula.
Does the NCG give South Korea control over US nuclear weapons?
How is the NCG different from NATO's Nuclear Planning Group?
Is the NCG compatible with the NPT?

Updated June 22, 2026

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Timeline

26 April 2023
The Nuclear Consultative Group (NCG) is a standing bilateral mechanism between the United States and the Republic of Korea created under the Washington Decla…
18 July 2023
The inaugural NCG meeting was held in Seoul on , coinciding with the port visit of the USS Kentucky, an Ohio-class ballistic missile submarine — the first su…

Research it like a delegate

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At the inaugural Nuclear Consultative Group meeting in Seoul on 18 July 2023, US and South Korean officials met as the USS Kentucky, an Ohio-class submarine, made a port call at Busan.

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Timeline

26 April 2023

The Nuclear Consultative Group (NCG) is a standing bilateral mechanism between the United States and the Republic of Korea created under the Washington Decla…

18 July 2023

The inaugural NCG meeting was held in Seoul on , coinciding with the port visit of the USS Kentucky, an Ohio-class ballistic missile submarine — the first su…

Research it like a delegate

The Nuclear Consultative Group (NCG) is a standing bilateral mechanism between the United States and the Republic of Korea created under the Washington Declaration, issued on 26 April 2023 by Presidents Joe Biden and Yoon Suk-yeol during a state visit to Washington.

The NCG was designed to deepen allied coordination on US extended deterrence in response to advancing North Korean nuclear and missile capabilities. It gives Seoul a more structured, institutionalized voice in discussions about how US nuclear forces would be employed in a Korean Peninsula contingency, without altering the United States' sole authority over nuclear use decisions or transferring nuclear weapons to South Korea. The Washington Declaration explicitly reaffirmed Seoul's commitments under the Treaty on the Non-Proliferation of Nuclear Weapons (NPT).

Key functions of the NCG include:

Sharing information on nuclear and strategic planning
Discussing the integration of South Korean conventional capabilities with US nuclear operations
Coordinating on signaling, including more visible deployments of US strategic assets such as ballistic missile submarines and bombers
Joint planning for tabletop exercises and crisis scenarios

The inaugural NCG meeting was held in Seoul on 18 July 2023, coinciding with the port visit of the USS Kentucky, an Ohio-class ballistic missile submarine — the first such visit to South Korea in roughly four decades. Subsequent meetings have produced Guidelines on Nuclear Deterrence and Nuclear Operations on the Korean Peninsula, endorsed by the two presidents in July 2024.

Analysts often compare the NCG to NATO's Nuclear Planning Group (NPG), though the NCG is bilateral and narrower in scope. Critics in South Korea argue it falls short of true nuclear sharing and does not satisfy domestic calls for an indigenous arsenal, while proponents view it as a politically significant upgrade to alliance assurance that addresses Seoul's concerns without weakening the global nonproliferation regime.

Frequently asked questions

Does the NCG give South Korea control over US nuclear weapons?

No. The Washington Declaration and subsequent statements make clear that the United States retains sole authority over the employment of its nuclear weapons. The NCG provides consultation and planning input, not shared command or basing of warheads in Korea.

How is the NCG different from NATO's Nuclear Planning Group?

The NCG is bilateral (US–ROK only) and was established in 2023, while the NPG dates to 1966 and includes most NATO members. NATO also hosts US nuclear gravity bombs on allied soil under nuclear sharing arrangements; no such weapons are stationed in South Korea.

Is the NCG compatible with the NPT?

Yes. The Washington Declaration explicitly reaffirms South Korea's NPT obligations as a non-nuclear-weapon state, and the NCG involves consultation rather than transfer of nuclear weapons or control over them.