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NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
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Securing the advanced reactor fleet
Physical protection accounts for a significant portion of a nuclear power plant’s operational costs. As the U.S. moves toward smaller and safer advanced reactors, similar protection strategies could prove cost prohibitive. For tomorrow’s small modular reactors and microreactors, security costs must remain appropriate to the size of the reactor for economical operation.
L. C. Longoria, J. C. Palacios, J. Santos
Nuclear Science and Engineering | Volume 133 | Number 2 | October 1999 | Pages 213-217
Technical Paper | doi.org/10.13182/NSE99-A2083
Articles are hosted by Taylor and Francis Online.
Measurements of gamma emission rates from Fe and Cu dosimeters extracted from a boiling water reactor-type reactor vessel were carried out to determine their total activity. The dosimeter's activity is related to the neutron flux at that location by taking into account the reactor material's embrittlement caused by neutron bombardment. The dosimeters were taken out after the first reactor operation cycle. From gamma radioactivity measurements of these dosimeters, neutron flux and fluence were calculated. These parameters are used in the determination of the shift and adjusted reference temperature values needed for the development of pressure-temperature curves used during reactor operation.