International Nuclear Energy Act of 2023 This bill addresses U.S. cooperation with other nations on nuclear energy-related issues. For example, the bill requires the President to launch an international initiative to modernize outreach to embarking civil nuclear nations, which may include establishing cooperative financing relationships for the export of civil nuclear technology and materials; the President, in coordination with international partners, to hold a biennial conference on civil nuclear safety, security, safeguards, and sustainability; the Department of State to meet with ally or partner nations for the purpose of collaborating on research, development, licensing, and deployment of advanced nuclear reactor technologies for civil nuclear energy; the State Department to provide financial assistance to embarking civil nuclear nations for developing civil nuclear energy programs; and the establishment of a working group to develop a 10-year civil nuclear trade strategy with biennial targets for the export of civil nuclear technologies.