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China condemns strikes on nuclear sites at IAEA conference, citing U.S. and Israeli actions in Iran
At the 70th IAEA General Conference on September 22, 2026, the Chinese delegation formally condemned military strikes against peaceful nuclear facilities, specifically citing U.nited States and Israeli actions in Iran as a threat to the NPT regime [3], [5]. Separately, the IAEA concluded a follow-up mission in July 2026 that reviewed China's first commercial small modular reactor [1].
- China aligned with an Iranian joint statement at the IAEA, arguing that UN Security Council Resolution 2231 has expired and that the agency should cease reporting on Iranian nuclear provisions [3], [5].
- The Chinese delegation characterized recent military strikes on safeguarded facilities as a "severe blow" to international law and the IAEA regime [3].
- An IAEA International Physical Protection Advisory Service (IPPAS) mission completed a 12-day review in China on July 10, 2026, marking the first time the agency has reviewed the physical protection of a small modular reactor (SMR) [1].
- The IPPAS team reported significant progress by the China Atomic Energy Authority in addressing security recommendations first issued in 2017 [1].
Full analysiswritten from the full pages behind this update
Analysis of Chinese Nuclear Diplomacy and Regulatory Developments
What happened
At the 70th IAEA General Conference on September 22, 2026, the Chinese delegation formally condemned military strikes against peaceful nuclear facilities, specifically citing actions by the United States and Israel in Iran as a threat to the Non-Proliferation Treaty (NPT) regime [3], [5]. China aligned with a joint statement delivered by Iran, arguing that UN Security Council Resolution 2231 expired in October 2025 and that the IAEA should cease reporting on Iranian nuclear provisions related to that resolution [3], [5]. The delegation characterized recent military strikes on safeguarded facilities as a "severe blow" to international law and the IAEA safeguards system [3].
Domestically, China hosted two major IAEA peer review missions in mid-2026:
- Physical Protection: An International Physical Protection Advisory Service (IPPAS) mission concluded on July 10, 2026. This was the first-ever IAEA mission to review the physical protection of a small modular reactor (SMR), specifically the Linglong One site in Hainan [1]. The team reported significant progress in addressing security recommendations first issued in 2017 [1].
- Safety Regulation: An Integrated Regulatory Review Service (IRRS) mission concluded on July 11, 2026. The 24-member team noted that China’s regulatory body has integrated digital tools and Artificial Intelligence (AI) into its safety oversight [2], [8].
China’s nuclear energy sector continues to expand, with 59 units currently operating, 32 under construction, and 21 planned [2]. A recent U.S. Department of Defense report estimates China now possesses over 600 operational nuclear warheads, an increase from 500 estimated in 2025, and approximately 400 ICBMs [7].
What changed
Diplomatically, China has shifted from general support for the JCPOA to a specific legal challenge against the IAEA’s reporting mandate. China now officially maintains that UN Security Council Resolution 2231 is terminated, meaning the IAEA Board should no longer deliberate on its provisions [5]. This is a departure from the status when we started following, where China advocated for a return to the JCPOA but had not yet formally challenged the legal basis for ongoing IAEA reporting under the expired resolution [9].
In the regulatory sphere, the July 2026 IPPAS mission marked the first time the IAEA has applied its physical protection guidance to a commercial SMR [1]. While China’s rapid expansion of its nuclear fleet was already known, the integration of AI into its national regulatory framework is a new development highlighted by the IRRS team [2].
The U.S. Department of Defense's 2026 assessment of 600 warheads indicates an acceleration in arsenal growth compared to the 500-warhead estimate provided in 2025 [7]. The completion of the first of two Russian-assisted CFR-600 reactors, which can produce weapons-grade plutonium, is also now a matter of record [7].
Why it matters
China’s alignment with Iran at the IAEA signals a hardening stance against Western-led pressure campaigns. By challenging the validity of IAEA reporting on Iran, Beijing is actively undermining the consensus required for snapback sanctions or further UN Security Council referrals [5].
The successful IAEA review of the Linglong One SMR provides a regulatory template for the global deployment of small modular reactors, a technology China intends to export [1]. However, the IAEA warned that China’s regulatory staffing levels must increase to keep pace with the "surge" in new reactor units to maintain safety standards [2], [8].
For strategic analysts, the reported increase to 600 warheads and the deployment of JL-3 SLBMs on JIN-class submarines suggests China is nearing its goal of a credible, survivable nuclear triad capable of striking the continental United States from protected coastal waters like the Bohai Gulf [7].
Open questions
- Human Resources: Both IAEA missions noted a potential shortage of qualified nuclear security and safety professionals. It remains unclear if the China Atomic Energy Authority (CAEA) can recruit and train enough personnel to oversee the 53 additional units currently under construction or planned [1], [2].
- Strategic Posture: While China maintains a "no first use" policy, the U.S. Department of Defense reports China is developing an "early warning counterstrike" posture [7]. The timeline for when this retaliatory posture becomes fully operational is unconfirmed.
- Diplomatic Deadlock: With China and Russia formally opposing the reconsideration of Iranian nuclear resolutions at the IAEA Board, it is unclear how the agency will maintain its verification mandate if Iran continues to suspend cooperation based on these legal arguments [5].
Sources cited above
3 references- [1]iaea.org — IAEA Concludes International Physical Protection Advisory Follow-Up ...
- [3]vienna.china-mission.gov.cn — Statement of Chinese Delegation on Prohibition of All Forms of Attacks ...
- [5]iranwatch.org — Statement by the Chinese Delegation at the September Board of Governors ...
The story so far
edited Sep 25 · 3 paragraphs changedWhat is happening
The United States and China are navigating heightened nuclear tensions that threaten global arms control stability and regional security in the Pacific [2], [4]. The Chinese delegation at the IAEA General Conference formally condemned military strikes against peaceful nuclear facilities on September 22, 2026, citing U.S. and Israeli actions in Iran as a threat to the Non-Proliferation Treaty [15]. This follows the U.S. Treasury Department's September 14, 2026, sanctions against a Chinese procurement network for supporting nuclear programs in Iran [11]. On the same day, the U.S. House Science Subcommittee discussed advancing domestic nuclear technology to compete with Chinese developments [10].
updated Sep 25 · 1 earlier version
Updated to include China's formal condemnation of U.S. and Israeli actions at the IAEA General Conference on September 22, 2026 [15].
The United States and China are navigating heightened nuclear tensions that threaten global arms control stability and regional security in the Pacific [2], [4]. The International Atomic Energy Agency (IAEA) General Conference is currently reviewing global safeguards and security frameworks as of September 19, 2026 [8]. This follows the U.S. Treasury Department's September 14, 2026, sanctions against a Chinese procurement network for supporting nuclear programs in Iran [11]. On the same day, the U.S. House Science Subcommittee discussed advancing domestic nuclear technology to compete with Chinese developments [10].
China aligned with an Iranian joint statement at the IAEA in September 2026, arguing that UN Security Council Resolution 2231 has expired and the agency should stop reporting on Iranian nuclear provisions [16], [17]. Domestically, the IAEA concluded a follow-up mission on July 10, 2026, that reviewed the physical protection of China's first commercial small modular reactor [13]. A separate IAEA safety mission noted on July 11, 2026, that China has integrated artificial intelligence into its nuclear regulatory oversight [14], [20].
added Sep 25
New facts regarding China's diplomatic alignment with Iran [16], [17] and the completion of IAEA missions in July 2026 [13], [14], [20].
What to watch
The IAEA General Conference continues its review of international nuclear security through late September 2026 [8]. Future diplomatic actions depend on whether the State Department issues formal statements confirming or denying reports of secret tests [2]. The White House has not yet announced specific sanctions or summit outcomes directly tied to recent ballistic missile activity [4]. Further legislative action remains pending as the House Armed Services Committee monitors the expansion of the Chinese arsenal, which the U.S. Department of Defense estimated reached 600 operational warheads in 2026 [3], [19].
updated Sep 25 · 1 earlier version
Updated to include the 2026 Department of Defense estimate of 600 operational warheads [19].
The IAEA General Conference continues its review of international nuclear security through late September 2026 [8]. Future diplomatic actions depend on whether the State Department issues formal statements confirming or denying reports of secret tests [2]. The White House has not yet announced specific sanctions or summit outcomes directly tied to recent ballistic missile activity [4]. Further legislative action remains pending as the House Armed Services Committee monitors the expansion of the Chinese arsenal [3].
Read the full brief · how we got here
How we got here
U.S. officials accused Beijing of conducting secret nuclear tests in February 2026 [2]. China subsequently launched a nuclear-capable ballistic missile into the Pacific Ocean on July 6, 2026 [4]. While the U.S. urged practical risk reduction steps earlier this year, formal arms control negotiations have not materialized [2], [12].
China maintains a policy of "no first use" and stated in a late 2025 white paper that it will keep capabilities at the minimum level required for national security [5], [6]. However, the U.S. House Armed Services Committee reports that China is rapidly expanding its nuclear arsenal [3]. Congressional researchers noted in May 2026 that China historically did not oppose other states acquiring nuclear weapons [1].
References · 17
- [1]congress.gov — PDF China: Nuclear and Missile Proliferation - Congress.gov
- [2]reuters.com — US accuses China of secret nuclear testing | Reuters
- [3]armedservices.house.gov — Rogers Statement on China's Rapid Nuclear Expansion | House Armed ...
- [4]state.gov — China Launches Nuclear Capable Ballistic Missile into Pacific Ocean
- [5]mfa.gov.cn — China releases white paper on arms control in new era
- [6]armscontrol.org — China Signals Continuity in Nuclear Policy Paper
- [8]tvitoday.com — IAEA General Conference 2026: Nuclear Power, Safeguards and Global ...
- [10]legis1.com — House Panel Weighs Advanced Nuclear Push Against China, Russia
- [11]uscc.gov — Press Release: U.S. Sanctions Chinese Procurement Network for ...
- [12]reuters.com — US urges discussions with China on practical nuclear risk reduction ...
- [13]iaea.org — IAEA Concludes International Physical Protection Advisory Follow-Up ...
- [14]news.energyjobline.com — IAEA Mission Reviews China's Regulatory Framework for Nuclear Safety
- [15]vienna.china-mission.gov.cn — Statement of Chinese Delegation on Prohibition of All Forms of Attacks ...
- [16]iaea.org — PDF Joint Statement by the People's Republic of China, the Islamic Republic ...
- [17]iranwatch.org — Statement by the Chinese Delegation at the September Board of Governors ...
- [19]hudson.org — Key Strategic Forces Takeaways from the 2024 China Military Power Report
- [20]miragenews.com — IAEA Assesses China's Nuclear Safety Regulations - Mirage News
What would close this
0 of 4 metTimeline
newest firstWhen we started following: U.S. sanctions Chinese procurement networks and monitors Pacific missile tests amid stalled arms control talks
The United States Treasury Department sanctioned a Chinese procurement network on September 14, 2026, for supporting nuclear programs in Iran [11]. This action follows a July 6, 2026, launch of a nuclear-capable ballistic missile by China into the Pacific Ocean [4]. U.S. officials previously accused Beijing of conducting secret nuclear tests in February 2026 [2].
China maintains a policy of "no first use" and released a white paper in late 2025 stating it will keep its nuclear capabilities at the minimum level required for national security [5], [6]. However, the U.S. House Armed Services Committee reports China is rapidly expanding its arsenal [3]. Congressional researchers noted in May 2026 that China historically did not oppose other states acquiring nuclear weapons [1].
Diplomatic engagement remains limited. While the U.S. urged practical risk reduction steps earlier this year [12], formal arms control negotiations have not materialized [2]. On September 14, 2026, the House Science Subcommittee discussed advancing U.S. nuclear technology to compete with Chinese developments [10]. The International Atomic Energy Agency (IAEA) General Conference, which opened September 19, 2026, is currently reviewing global safeguards and security frameworks [8].