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Conference Spotlight
2026 Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
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
Dec 2025
Jul 2025
Latest Journal Issues
Nuclear Science and Engineering
January 2026
Nuclear Technology
December 2025
Fusion Science and Technology
November 2025
Latest News
What’s the most difficult question you’ve been asked as a maintenance instructor?
Blye Widmar
"Where are the prints?!"
This was the final question in an onslaught of verbal feedback, comments, and critiques I received from my students back in 2019. I had two years of instructor experience and was teaching a class that had been meticulously rehearsed in preparation for an accreditation visit. I knew the training material well and transferred that knowledge effectively enough for all the students to pass the class. As we wrapped up, I asked the students how they felt about my first big system-level class, and they did not hold back.
“Why was the exam from memory when we don’t work from memory in the plant?” “Why didn’t we refer to the vendor documents?” “Why didn’t we practice more on the mock-up?” And so on.
Technical Session
Tuesday, September 27, 2022|10:00AM–12:05PM PDT|Harbor
Session Chair:
Hideo Hirayama (High Energy Accelerator Research Organization, KEK)
Alternate Chair:
Maha Bouhadida (IRSN)
Session Organizer:
Thomas M. Miller (ORNL)
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Investigation and Analysis of the TEPCO's Fukushima Daiichi NPS Accident (March 2021)
10:00–10:25AM PDT
Masaya Yasui (Nuclear Regulatory Agency)
Presented by Kohei Iwanaga (Nuclear Regulatory Agency Japan)
Paper
Estimation of 137Cs Activity Using Pinhole Gamma Camera at Unit 2 Operation Floor in Fukushima Daiichi Nuclear Power Station
10:25–10:50AM PDT
Katsumi Hayashi (Nuclear Regulation Authority), Hideo Hirayama (High Energy Accelerator Research Organization), Kohei Iwanaga (Nuclear Regulation Authority), Kenjiro Kondo (High Energy Accelerator Research Organization), Seishiro Suzuki (Nuclear Regulation Authority)
Estimated Cs-137 Radioactivity Deposited in the Gap Between the Top and Middle Cover of the Shield Plug in Fukushima Daiichi Nuclear Power Station Unit 2
10:50–11:15AM PDT
Kohei Iwanaga (Nuclear Regulatory Agency), Hideo Hirayama (High Energy Accelerator Research Organization), Katsumi Hayashi (Nuclear Regulatory Agency), Kenjiro Kondo (Nuclear Regulatory Agency), Seishiro Suzuki (Nuclear Regulatory Agency), Zenko Yoshida (Nuclear Regulatory Agency)
Radiation Environment Around the Contaminated Water Storage Tank Including Highly Concentrated 90Sr/90Y at Fukushima Daiichi Nuclear Power Station
11:15–11:40AM PDT
Hideo Hirayama (Nuclear Regulatory Agency), Kenjiro Kondo (Nuclear Regulatory Agency), Seishiro Sszuki (Nuclear Regulatory Agency), Shimpei Hamamoto (Nuclear Regulatory Agency), Kohei Iwanaga (Nuclear Regulatory Agency)
Neutron Spectra Reconstruction with an Artificial Neural Network Trained with a Large Built Dataset
11:40AM–12:05PM PDT
M. Bouhadida (IRSN), M. Brovchenko (IRSN), T. Vinchon (IRSN), W. Monange (IRSN), F. Trompier (IRSN)
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