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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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!
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Nuclear Science and Engineering
September 2025
Nuclear Technology
August 2025
Fusion Science and Technology
Latest News
Deep Space: The new frontier of radiation controls
In commercial nuclear power, there has always been a deliberate tension between the regulator and the utility owner. The regulator fundamentally exists to protect the worker, and the utility, to make a profit. It is a win-win balance.
From the U.S. nuclear industry has emerged a brilliantly successful occupational nuclear safety record—largely the result of an ALARA (as low as reasonably achievable) process that has driven exposure rates down to what only a decade ago would have been considered unthinkable. In the U.S. nuclear industry, the system has accomplished an excellent, nearly seamless process that succeeds to the benefit of both employee and utility owner.
Technical Session
Monday, September 15, 2025|1:00–2:40PM CDT|Room 1
Session Chair:
Brittany M. Williamson
Session Organizer:
Alternate Chair:
Satoshi Gunji
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The Pre-service Inspection for the Static Experiment Critical Facility (STACY)
1:00–1:20PM CDT
Kenta Hasegawa (Japan Atomic Energy Agency), Masakazu Seki (Japan Atomic Energy Agency), Eiju Aizawa (Japan Atomic Energy Agency), Masato Sumiya (Japan Atomic Energy Agency), Tomoki Yoshikawa (JAEA), Tomoyuki Maekawa (Japan Atomic Energy Agency), Junichi Ishii (JAEA), Shouhei Araki (Japan Atomic Energy Agency), Kazuhiko Izawa (Japan Atomic Energy Agency), Satoshi Gunji (Japan Atomic Energy Agency)
Paper
Design of Heterogenous Core Configurations with Concrete and Stainless-Steel Rods in the Modified STACY Facility
1:20–1:40PM CDT
Benjamin Dechenaux (Autorité de Sûreté Nucléaire et de Radioprotection (ASNR)), Mariya Brovchenko (Autorité de Sûreté Nucléaire et de Radioprotection (ASNR)), Satoshi Gunji (Japan Atomic Energy Agency), Shouhei Araki (Japan Atomic Energy Agency), Kenya Suyama (Japan Atomic Energy Agency)
Critical Experiment Analyses in the Modified STACY Core Simulating Fuel Debris
1:40–2:00PM CDT
Shigeki Shiba (Nuclear Regulatory Authority of Japan)
Experiments on Concrete-loaded Core in the Modified STACY
2:00–2:20PM CDT
Shouhei Araki (JAEA), Yu Arakaki (JAEA), Tomoyuki Maekawa (JAEA), Yutaka Kamikawa (JAEA), Kenta Hasegawa (JAEA), Tomoki Yoshikawa (JAEA), Yuta Tada (JAEA), Masato Sumiya (JAEA), Masakazu Seki (JAEA), Eiju Aizawa (JAEA), Junichi Ishii (JAEA), Kazuhiko Izawa (JAEA), Daiki Shiba (NRA), Shigeki Shiba (NRA), Satoshi Gunji (JAEA)
Studies of Nuclear Criticality Safety of Fuel Debris using the Modified STACY Critical Assembly
2:20–2:40PM CDT
Satoshi Gunji (Japan Atomic Energy Agency), Shouhei Araki (Japan Atomic Energy Agency), Tomoki Yoshikawa (Japan Atomic Energy Agency), Yu Arakaki (Japan Atomic Energy Agency), Eiju Aizawa (Japan Atomic Energy Agency), Masakazu Seki (Japan Atomic Energy Agency), Junichi Ishii (Japan Atomic Energy Agency), Kazuhiko Izawa (Japan Atomic Energy Agency), Shigeki Shiba (Secretariat of Nuclear Regulation Authority), Daiki Iwahashi (Secretariat of Nuclear Regulation Authority)
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