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2026 Nuclear Energy Conference & Expo (NECX)
August 24–27, 2026
Dallas, TX|Hilton Anatole
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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.
19th International Conference on Probabilistic Safety Assessment and Analysis (PSA 2025)
Technical Session|Sponsored by NISD
Wednesday, June 18, 2025|10:00–11:45AM CDT|Northwestern/Ohio State
Session Chair:
Kevin R. O'Kula
Alternate Chair:
Egemen M. Aras
Session Organizer:
David Grabaskas
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Dose-Based Computational Fluid Dynamics Modeling for Consequence-Driven Risk-Informed Urban Advanced Reactor Siting
10:00–10:20AM CDT
Jarred Jordan (Georgia Tech), Martin Graffigna (Georgia Tech), Shaheen Dewji (Georgia Tech)
Paper
Integrated Simulation-Based Radiological Assessment of Depressurization Event Scenarios in High Temperature Gas Cooled Reactors
10:20–10:40AM CDT
Nolan D. Ritchie (NCSU), Yahya A. Alzahrani (NCSU), Jackson D. Hase (NCSU), Mihai A. Diaconeasa (NCSU)
Sensitivity Analyses on the Phenomenological Parameters in the Aerosol Dynamics Models in I-COSTA Applied to International Standard Problem No 44
10:40–11:00AM CDT
Miran Park (Jeonbuk Nat'l Univ.), Yoonhee Lee (Jeonbuk Nat'l Univ.)
Analysis of Radiological Release From Fueled Irradiation Experiments During Manual Handling
11:00–11:20AM CDT
Daniel K. Sluder (Idaho National Laboratory - Advanced Test Reactor), Igor A. Sarygin (INL), Jacob L. Westacott (INL), Mihai A. Diaconeasa (NCSU)