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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.
D. S. Rowe, D. E. McFeron
Nuclear Science and Engineering | Volume 26 | Number 3 | November 1966 | Pages 319-328
Technical Paper | doi.org/10.13182/NSE66-A17352
Articles are hosted by Taylor and Francis Online.
This paper presents a mathematical model that describes the heat transfer in a defectively bonded flat-plate fuel element. The bond defect is assumed to exist only on one side of the fuel plate and to be either a circular spot or infinite strip in shape. Details of the general solution to the heat conduction equation for the mathematical model are shown for the strip-type defect. For a particular type of defect, the temperature distribution is dependent upon three dimensionless parameters that include the effects of defect size and the heat transfer properties of the defective fuel element. Data are provided in terms of the three dimensionless parameters that permit rapid estimates of fuel temperatures in fuel plates with strip and spot defects. These defects are assumed to be step reductions in the normal fuel-boundary conductance. Defect sizes on the order of a couple of fuel thicknesses can cause significant local increases in the fuel temperature and fuel-surface heat flux.