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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.
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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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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Report: New York state adding 1 GW of nuclear to fleet
New York Gov. Kathy Hochul has instructed the state’s public electric utility to add at least 1 gigawatt of new nuclear by building a large-scale nuclear plant or a collection of smaller modular reactors, according to the Wall Street Journal.
Pierre Saunier (CEA), Franck Peysson, Denis Etienne (BOUYGUES Construction), Julien Niepceron (EDF)
Proceedings | 2018 International Congress on Advances in Nuclear Power Plants (ICAPP 2018) | Charlotte, NC, April 8-11, 2018 | Pages 675-684
More stringent safety requirements for Civil Works of future nuclear buildings combined with severe design loads lead to continuously increase the steel bars demand in Reinforced Concrete (RC) structures. The related implementation issues during the detailed design and the construction create for the projects both delays and cost escalation.
As a consequence trend in nuclear civil engineering is to resort more often to Steel Concrete (SC) structures when large steel reinforcement ratios are anticipated from the preliminary design of a RC structures. These prefabricated modules (steel part) could also replace a large part of the embedment parts for moderate loads that reach the outstanding quantity of 100.000 plates for the recent Nuclear Power reactor projects and bring a solution for containment (liquid or gas).
One main advantage is also a gain on the construction schedule as the steel modules are prefabricated and in situ construction operations are limited to the connection of the steel modules and the infill concreting.
SC modular structures are entering in the frame of ongoing nuclear projects like ASTRID, the Generation IV Sodium cooled Fast Reactor industrial demonstrator under development by the CEA in France. The civil work design of ASTRID is based on Eurocodes and more specifically on AFCEN Rules for design and construction of PWR nuclear civil works (RCC-CW). Preliminary studies (design and construction methodology) have demonstrated the feasibility to realize in SC different structural parts. CEA and BOUYGUES Company are currently working to benchmark the pros and cons of the SC modules in ASTRID against a reinforced concrete structure, focusing on construction methods, and subsequently to define the cost and schedule impacts.