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.
Division Spotlight
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
Meeting Spotlight
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
Latest Magazine Issues
May 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
June 2025
Nuclear Technology
Fusion Science and Technology
Latest News
NRC dockets construction permit for Dow, X-energy SMR
The Nuclear Regulatory Commission has accepted Dow’s construction permit application to build an X-energy small modular reactor in Seadrift, Texas.
19th International Conference on Probabilistic Safety Assessment and Analysis (PSA 2025)
Technical Session|Sponsored by NISD
Tuesday, June 17, 2025|10:00–11:45AM CDT|Chicago Ballroom C
Session Chair:
Gerry W. Kindred
Alternate Chair:
Nathan R. DeKett
Session Organizer:
David Grabaskas
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Safety Analysis Methodology for Multipurpose Nuclear Microreactors from the Conceptual Design Stage
10:00–10:20AM CDT
Liz A. Ambruster (National Autonomous University of Mexico), Pamela F. Nelson (National Autonomous University of Mexico), Orestes Castillo-Hernández (Comisión Nacional de Seguridad Nuclear y Salvaguardias (CNSNS))
Paper
Reactor System Design Optimization Using the ASME Plant Systems Design Standard (PSD-1)
10:20–10:40AM CDT
Orestes Castillo-Hernández (CNSNS), David A. Quintanar-Gago (UNAM), Pamela F. Nelson (UNAM), CR Grantom (CRG LLC), Ralph Hill (Hill Engineering Solutions LLC)
Integration of PSA in the BWRX-300 Design Requirements Management System
10:40–11:00AM CDT
Cuauhtemoc R. Hernandez (GE-Hitachi Nuclear Energy), Tyra Gordon (GE-Hitachi Nuclear Energy), Patrick Mirek (GE-Hitachi Nuclear Energy), Sean Stepanow (GE-Hitachi Nuclear Energy)
Probabilistic Evaluations of Digital Instrumentation and Control Applications in the Design of BWRX-300
11:00–11:20AM CDT
Nathan R. DeKett (GE - Hitachi Nuclear Energy)
ASME PSD-1 to Support the Design of HVAC for a Radioisotope Production Facility
11:20–11:40AM CDT
Omar Pérez-Parrazal (Universidad Nacional Autónoma de México), Pamela F. Nelson (UNAM)
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