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Division Spotlight
Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver 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!
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Latest News
TerraPower begins U.K. regulatory approval process
Seattle-based TerraPower signaled its interest this week in building its Natrium small modular reactor in the United Kingdom, the company announced.
TerraPower sent a letter to the U.K.’s Department for Energy Security and Net Zero, formally establishing its intention to enter the U.K. generic design assessment (GDA) process. This is TerraPower’s first step in deployment of its Natrium technology—a 345-MW sodium fast reactor coupled with a molten salt energy storage unit—on the international stage.
H. Deuber, J. G. Wilhelm
Nuclear Technology | Volume 46 | Number 3 | December 1979 | Pages 399-403
Technical Paper | Nuclear Power Reactor Safety / Reactor | doi.org/10.13182/NT79-A32345
Articles are hosted by Taylor and Francis Online.
In a 1300-MW(electric) pressurized water reactor power plant, the sources of the airborne 131I species were determined over a period of five months. During power operation, the main source of the radio-logically decisive elemental 131I was the exhaust from the hoods in which samples from the primary coolant are taken and processed. During refueling outage, elemental 131I was mainly contributed by the containment purge air. By efficient filtration of these exhausts, a reduction of the ingestion dose, caused by the total 131I stack release, by a factor of nearly 4 during power operation and of possibly 10 during refueling outage can be accomplished.
