Directs the Secretary of the Treasury to use the U.S. voice, vote, and influence at the World Bank, the European Bank for Reconstruction and Development, and other development banks to support financing and technical assistance for nuclear energy projects in borrowing countries. It seeks to remove bank-level bans on nuclear support, build institutional expertise on nuclear power (including small modular reactors), and make nuclear an eligible option for clean energy lending.

Creates Nuclear Energy Assistance Trust Funds at each bank to provide competitive financing and high‑quality technical help for nuclear projects, while allowing U.S. officials to also encourage nuclear support through regular bank programs. Requires 7 years of annual progress reporting to Congress and ends all authorities 10 years after enactment.