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Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
2022 ANS Winter Meeting and Technology Expo
November 13–17, 2022
Phoenix, AZ|Arizona Grand Resort
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Belgium’s nuclear phaseout begins
Unit 3 at the Doel nuclear power plant has become Belgium’s first reactor to be permanently shuttered, in keeping with that nation’s nuclear phaseout policy. The 1,006-MWe pressurized water reactor, which began commercial operation in October 1982, was removed from service last Friday at 9:31 p.m. (local time).
Belgium’s nuclear reactor fleet now consists of six operating units: Doel-1, -2, and -4 and Tihange-1, -2, and -3. Next on the retirement list is Tihange-2, scheduled to be shut down in February 2023.
Andreas Pritzker, Jrg Gassmann
Nuclear Technology | Volume 48 | Number 3 | May 1980 | Pages 289-297
Technical Paper | Radioactive Waste | dx.doi.org/10.13182/NT80-A32475
Articles are hosted by Taylor and Francis Online.
A method has been developed that is based on simplified reliability models and that allows us to estimate the risk of nuclide release from underground nuclear waste repositories. The prototype repository is treated as a combination of geological and man-made barriers. Risk depends on time and is expressed as failure probability of the barrier system for all possible initiating events, multiplied by the inventory to be released. The results include, for each nuclide, the time and amount of the maximum probable discharge rate, which can be used in a biosphere transport model. They also illustrate the effectiveness of single barriers in the barrier system, and therefore allow a preselection among alternative barrier concepts, barrier qualities, and repository sites. The probabilistic failure models for the single barriers and the entire barrier system depend on only a few parameters; therefore, the application of the method is fast and inexpensive. It has to be stressed, however, that this simple method cannot replace more detailed and sophisticated risk studies, but allows concentrating them on preselected repository concepts. It therefore represents a useful tool in the early design and site evaluation phase for all kinds of repositories and waste types. Its usefulness has been demonstrated by performing several case studies with the computer program WRISK on some typical nuclides in high level waste, bearing in mind that for a repository concept all nuclides of possible importance should be considered.