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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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.
Dominic J. Raso
Nuclear Science and Engineering | Volume 17 | Number 3 | November 1963 | Pages 411-418
Technical Paper | doi.org/10.13182/NSE63-A17390
Articles are hosted by Taylor and Francis Online.
Abstract-Monte Carlo calculations were performed to determine the backscattering from and transmission through concrete of 0.2, 0.5, 1.0, 2.0, 4.0, 6.0, and 10.0 Mev gamma rays. The radiation was assumed to be incident on a semi-infinite medium and on slab thicknesses of 0.5, 1.0, 2.0, and 4.0 mfp at angles of cos00 = 1.0, 0.75, 0.50, 0.25, and 0.10. The case histories of 5000 photons were followed on the IBM 704 digital computer for each of the 175 geometries (874,000 histories). The information obtained included: (1) The characteristics of emergent photons, which were stored on magnetic tape; (2) a routine that processes these characteristics to give polar and azimuthal angular dose distribution; and (3) detailed results from the application of the processing routine to the parameters investigated. The computer program, the processing routine, and the detailed results are given in ref. 1.
