The "Reactors at Risk Act of 2026" mandates a joint report from the Secretary of Defense and the Under Secretary of Energy for Nuclear Security, due within 120 days of enactment, to assess dangers posed by nuclear reactors in areas prone to armed conflict . This report must evaluate threats to U.S. national security, allied interests, and civilian populations from reactors in regions that have experienced conflict in the last 25 years or are likely to face future engagements, including specific flashpoints like Russia-Ukraine, the Middle East, Taiwan, or India-Pakistan. Furthermore, it requires outlining concrete steps the United States and its partners can take to prevent, prepare for, and mitigate these risks. The unclassified report, which may include a classified annex, will be submitted to relevant congressional committees.