Reactors at Risk Act of 2026

Reactors at Risk Act of 2026 (S. 4495)

Purpose and intent

• Establishes a requirement for a joint government report evaluating the dangers posed by civilian nuclear reactors located in areas that could experience armed conflict.
• Aims to inform national security, allied interests, and civilian safety by assessing risks and identifying measures to prevent, prepare for, and mitigate those risks.

Key provisions and changes

• Section 2 – Report on Dangers Posed by Nuclear Reactors in Areas that Might Experience Armed Conflict
  • Timing: Requires the report to be submitted within 120 days after enactment.
  • Responsible agencies: Secretary of Defense and the Under Secretary of Energy for Nuclear Security must jointly prepare and submit the report.
  • Scope of assessment (subsection a):
  • Identify dangers to:
    • U.S. national security and interests of allies/partners.
    • Safety and security of civilian populations.
  • Focus areas include nuclear reactors that exist as of enactment or are scheduled for completion over the next 10 years.
  • Geographic and conflict-related criteria:
    • Regions with armed conflict in the past 25 years, including:
    • Attacks by Russia on Ukraine.
    • Middle East conflicts (e.g., Israel-Iran tensions).
    • Areas that are contested or likely to experience armed conflict during the reactors’ lifespans.
    • Areas involved in potential conflicts such as:
    • Russia–Estonia, Latvia, Belarus, Lithuania, Poland scenario.
    • India–Pakistan conflict.
    • Taiwan-related conflict.
    • North Korea–South Korea conflict.
    • The bill presents a non-exhaustive list of specific scenarios to consider.
  • Scope also includes risk reduction steps that the U.S. or allies/partners can take to prevent, prepare for, and mitigate risks arising from these reactors.
  • Form of the report (subsection b):
  • Unclassified report required.
  • May include a classified annex for sensitive details.
  • Congressional oversight (subsection c):
  • Defines “appropriate committees of Congress” as:
    • Senate: Armed Services, Foreign Relations, and Environment and Public Works.
    • House: Armed Services, Foreign Affairs (Foreign Affairs Committee), and Energy and Commerce.

Who is affected

• Federal government agencies: Department of Defense and the Department of Energy (Under Secretary for Nuclear Security) will be responsible for preparing the report.
• Policymakers and Congress: Receives the report, including the specified committees.
• General public: The unclassified contents of the report will inform public understanding of nuclear reactor security risks tied to potential armed conflict.

Procedural and timeline aspects

• Introduction and referral:
  • Introduced May 12, 2026, and referred to the Senate Committee on Armed Services.
• Reporting deadline:
  • Entire joint report due within 120 days of enactment.
• Form and accessibility:
  • Primarily unclassified; may include a classified annex for sensitive information.
• Sponsorship:
  • Co-sponsors include Sen. Jeff Merkley and Sen. Edward J. Markey.

Potential impact and considerations

• The bill would produce a formal risk assessment of reactors in potentially volatile regions, potentially influencing:
  • U.S. defense and energy security planning.
  • Allied coordination and contingency planning.
  • Nuclear safety and emergency preparedness measures in regions with existing or planned reactors.
• By mandating analysis of specific geopolitical scenarios, the bill may inform future policy decisions, mitigation investments, and diplomatic engagement with partner nations.
• The emphasis on an unclassified, publicly releasable report (with a possible classified annex) seeks to balance transparency with national security concerns.