United States Nuclear Regulatory Commission - Protecting People and the Environment

Spent Fuel Decay Heat Measurements Performed at the Swedish Central Interim Storage Facility (NUREG/CR-6971)

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Publication Information

Manuscript Completed: June 2009
Date Published: February 2010

Prepared by:
B.D. Murphy and I.C. Gauld

Oak Ridge National Laboratory
Managed by UT-Battelle, LLC
Oak Ridge, TN 37831-6170

M. Aissa, NRC Project Manager

Prepared for:
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington DC 20555-0001

NRC Job Code Y6517

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Abstract

Calorimeter measurements of full-length spent fuel assemblies have been performed at the Swedish Central Interim Storage Facility for Spent Fuel (CLAB) located in Oskarshamn, Sweden. These measurements provide an important and unique database for the validation of computer code predictions of decay heat for modern fuel types and assembly designs. The measured assemblies include boilingwater reactor 8 × 8, 9 × 9, SVEA-64, and SVEA-100 assemblies, and pressurized-water reactor 15 × 15 and 17 × 17 assemblies. This report compiles the assembly design and fuel data, reactor operating history data, reactor conditions, and the results of the decay heat measurements that have been performed for intact spent fuel assemblies. The data are presented in sufficient detail to allow independent code validation studies to be performed.

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