Effects of Burnable Absorbers on PWR Spent Nuclear Fuel
Burnup credit is an ongoing issue in designing and licensing transportation and storage casks for spent nuclear fuel (SNF). To address this issue, in July 1999, the U.S. Nuclear Regulatory Commission (NRC), Spent Fuel Project Office, issued Interim Staff Guidance-8 (ISG-8), Revision 1 allowing limited burnup credit for pressurized water reactor (PWR) spent nuclear fuel (SNF) to be used in transport and storage casks. However, one of the key limitations for a licensing basis analysis as stipulated in ISG-8, Revision 1 is that ''burnup credit is restricted to intact fuel assemblies that have not used burnable absorbers''. Because many PWR fuel designs have incorporated burnable-absorber rods for more than twenty years, this restriction places an unnecessary burden on the commercial nuclear power industry. This paper summarizes the effects of in-reactor irradiation on the isotopic inventory of PWR fuels containing different types of integral burnable absorbers (BAs). The work presented is illustrative and intended to represent typical magnitudes of the reactivity effects from depleting PWR fuel with different types of burnable absorbers.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
MOL.20000921.0215, DC#26423; TRN: US0600510
- DOE Contract Number:
- Resource Type:
- Technical Report
- Research Org:
- Yucca Mountain Project, Las Vegas, Nevada
- Sponsoring Org:
- Country of Publication:
- United States
- 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 29 ENERGY PLANNING, POLICY AND ECONOMY; BURNUP; CASKS; FUEL ASSEMBLIES; IRRADIATION; LICENSING; NUCLEAR FUELS; NUCLEAR POWER; PWR TYPE REACTORS; SPENT FUELS; STORAGE; TRANSPORT
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