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Conference Spotlight
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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Hash Hashemian: Visionary leadership
As Dr. Hashem M. “Hash” Hashemian prepares to step into his term as President of the American Nuclear Society, he is clear that he wants to make the most of this unique moment.
A groundswell in public approval of nuclear is finding a home in growing governmental support that is backed by a tailwind of technological innovation. “Now is a good time to be in nuclear,” Hashemian said, as he explained the criticality of this moment and what he hoped to accomplish as president.
Gilles Champion, Josette Forestier, Thérèse Vergnaud
Nuclear Technology | Volume 74 | Number 1 | July 1986 | Pages 14-26
Technical Paper | Fission Reactor | doi.org/10.13182/NT86-A33815
Articles are hosted by Taylor and Francis Online.
The efforts made by Electricité de France to reduce exposure from the two-component neutrongamma radiation fields inside the pressurized water reactor (PWR) building are described. Most of the attention has been focused on the problem of neutron exposure relative to the problem of achieving a highly efficient confinement within the reactor cavity and the state of the art of personnel neutron dosimetry. A description of the general neutron calculation scheme that links the characteristics of the neutron fields escaping from the reactor vessel to the dose equivalent rate cartographies inside the reactor building is provided. Numerous measurements have been carried out to check the reference radiation sources involved in the calculation scheme and its predictions, increasing confidence in the calculational results. During the design of neutron shielding, it is necessary to take into account many requirements, particularly those of accessibility, safety, and normal operation. Some shielding materials commonly used on French PWRs are presented. The emphasis placed on the evolution of shieldings designed to prevent irradiation through the three main weaknesses of the primary concrete shield (access pit, primary bunkers, and refueling pool bottom) shows that they should become increasingly sophisticated. A comparison between the former shielding designs for three-loop PWRs and the latter for four-loop PWRs is made for this purpose.