ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Explore membership for yourself or for your organization.
Conference Spotlight
2026 Nuclear Energy Conference & Expo (NECX)
August 24–27, 2026
Dallas, TX|Hilton Anatole
Latest Magazine Issues
Aug 2026
Jan 2026
2026
Latest Journal Issues
Nuclear Science and Engineering
September 2026
Nuclear Technology
Fusion Science and Technology
August 2026
Latest News
Oklo’s Isotope Test Reactor achieves criticality
Oklo’s Groves Isotope Test Reactor became the fifth Department of Energy–authorized reactor to achieve criticality under the agency’s authorization process, it was announced earlier today.
Criticality was reached at 9:19 p.m. (EDT) on Wednesday at the company’s Groves facility in Lockhart, Texas, according to the DOE.
Ivor Clifford (Paul Scherrer Institute), Pavel Kral (Nuclear Research Institute Rez), Ladislav Vyskocil (Nuclear Research Institute Rez), Vladislav Pistora (Nuclear Research Institute Rez), Richard Trewin (Framatome), Yuliia Filonova (IPP-CENTRE), Vladislav Filonov (IPP-CENTRE), Lukasz Sokolowski (Kiwa Technical Consulting), Jürgen Hartung (GRS), Szabolcs Szávai (Bay Zoltán Foundation for Applied Research), Andrej Prošek (Jožef Stefan Institute), Jerome Roy (IRSN), Markku Puustinen (LUT Univ.), Maksym Vyshemirskyi (State Scientific and Technical Center for Nuclear and Radiation Safety), Richard Bass (Oakridge Consulting Int'l), Paul Williams (Oakridge Consulting Int'l), Takeshi Takeda (Japan Atomic Energy Agency), Carlos Cueto-Felgueroso (Tecnatom)
Proceedings | 20th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-20) | Washington, D.C., August 20-25, 2023 | Pages 5778-5790