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Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Michael Täschner, Claus Bunnenberg, Henry Camus, Yves Belot
Fusion Science and Technology | Volume 28 | Number 3 | October 1995 | Pages 976-981
Tritium Safety | Proceedings of the Fifth Topical Meeting on Tritium Technology in Fission, Fusion, and Isotopic Applications Belgirate, Italy May 28-June 3, 1995 | doi.org/10.13182/FST95-A30532
Articles are hosted by Taylor and Francis Online.
Although the process of tritium reemission from soils after HT or HTO deposition is principally understood, the prediction of initial values and time courses of reemission rates on the basis of readily available data is still insufficient, especially when high time resolutions are required. Theoretical and experimental investigations discussed here show that for a yet limited number of environmental conditions good model performance is reached. In the case of evaporation conditions the initial reemission rate after HT deposition can be coupled to the evaporation rate, when the tritium profile in soil is of exponential shape, characterized by a mean scaling length. After HTO deposition the ideal profile can be described by an error function with a scaling length about 1/3 of that of the HT case. Hence, the initial reemission rate is 3 times higher. Time courses can be modeled by a diffusion approach applying the same diffusion coefficient as for the deposition process.