1. Short title This Act may be cited as the International Nuclear Energy Act of 2023 . 2. Definitions In this Act: (1) Advanced nuclear reactor The term advanced nuclear reactor means— (A) a nuclear fission reactor, including a prototype plant (as defined in sections 50.2 and 52.1 of title 10, Code of Federal Regulations (or successor regulations)), with significant improvements compared to reactors operating on October 19, 2016, including improvements such as— (i) additional inherent safety features; (ii) lower waste yields; (iii) improved fuel and material performance; (iv) increased tolerance to loss of fuel cooling; (v) enhanced reliability or improved resilience; (vi) increased proliferation resistance; (vii) increased thermal efficiency; (viii) reduced consumption of cooling water and other environmental impacts; (ix) the ability to integrate into electric applications and nonelectric applications; (x) modular sizes to allow for deployment that corresponds with the demand for electricity or process heat; and (xi) operational flexibility to respond to changes in demand for electricity or process heat and to complement integration with intermittent renewable energy or energy storage; (B) a fusion reactor; and (C) a radioisotope power system that utilizes heat from radioactive decay to generate energy. (2) Ally or partner nation The term ally or partner nation means— (A) the Government of any country that is a member of the Organisation for Economic Co-operation and Development; (B) the Government of the Republic of India; and (C) the Government of any country designated as an ally or partner nation by the Secretary of State for purposes of this Act. (3) Appropriate committees of Congress The term appropriate committees of Congress means— (A) the Committees on Foreign Relations and Energy and Natural Resources of the Senate