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Fusion Science and Technology
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.
Susana Reyes, Jeffery F. Latkowski, Javier Sanz
Fusion Science and Technology | Volume 37 | Number 3 | May 2000 | Pages 225-230
Technical Paper | doi.org/10.13182/FST00-A136
Articles are hosted by Taylor and Francis Online.
Radioactive afterheat is an important source term for the release of radionuclides in fusion systems under accident conditions. Heat transfer calculations are used to determine time-temperature histories in regions of interest, but the true source term needs to be the "effective afterheat," which considers the transport of penetrating gamma rays. Without consideration of photon transport, accident temperatures may be overestimated in some regions while being underestimated in others. The importance of this effect is demonstrated for a simple, one-dimensional problem. The significance of this effect depends strongly on the accident scenario being analyzed.