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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Wright officially sworn in for third term at the NRC
The Nuclear Regulatory Commission recently announced that David Wright, after being nominated by President Trump and confirmed by the Senate, was ceremonially sworn in as NRC chair on September 8.
This swearing in comes more than a month after Wright began his third term on the commission; he began leading as chair July 31. His term will conclude on June 30, 2030.
Daisuke Kawasaki, Joonhong Ahn, Chang-Lak Kim, Jin-Beak Park
Nuclear Technology | Volume 154 | Number 3 | June 2006 | Pages 374-388
Technical Paper | Radioactive Waste Management and Disposal | doi.org/10.13182/NT06-A3741
Articles are hosted by Taylor and Francis Online.
The release of radionuclides from the conceptual low- and intermediate-level radioactive waste (LILW) repository in Korea is analyzed by establishing a multicompartment model. The model takes into account the vault-array configuration consisting of multiple waste types, multimember radioactive decay chains, and radionuclide transport through the water-unsaturated regions and water-saturated aquifer. Observations of the repository performance have been made with the radiological exposure dose rates and with the radiotoxicities in the environment.Numerical results show that, among all the radionuclides in the waste, 129I is the predominant contributor to the overall peak exposure dose rate. The peak exposure dose rate of 129I can be affected by a migration distance in the geosphere and the vault-array configuration. Reducing the initial inventory of 129I stored in the waste vaults or spreading its release over a longer time period by modification of the engineered barrier system would effectively reduce the exposure dose rate because the release rate of 129I from the repository is reduced.The total radiotoxicity in the environment is dominated by 129I at early times and by 238U and its daughters after 106 yr. Because of the long half-lives of these nuclides, the radiotoxicity in the environment is insensitive to the vault-array configuration or to the transport distance in the geosphere.
