Photon dose rates from spent fuel assemblies with relation to self- protection

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Photon dose rates as a function of fission product decay times have been calculated for spent fuel assemblies typical of MTR-type research and test reactors. Based upon these dose rates, the length of time that a spent fuel assembly will be self-protecting (dose rate greater than 100 rem/h at 1 m in air) can be estimated knowing the mass of fuel burned, the fraction of fuel burned, and the fuel assembly specific power density. The calculated dose rates cover 20 years of fission product decay, spent fuel with up to 80% {sup 235}U burnup and assembly power densities ranging from ... continued below

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15 p.

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Pond, R.B. & Matos, J.E. December 1, 1995.

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Photon dose rates as a function of fission product decay times have been calculated for spent fuel assemblies typical of MTR-type research and test reactors. Based upon these dose rates, the length of time that a spent fuel assembly will be self-protecting (dose rate greater than 100 rem/h at 1 m in air) can be estimated knowing the mass of fuel burned, the fraction of fuel burned, and the fuel assembly specific power density. The calculated dose rates cover 20 years of fission product decay, spent fuel with up to 80% {sup 235}U burnup and assembly power densities ranging from 0.089 to 2.857 MW/kg{sup 235}U. Most of the results are unshielded dose rates at 1 m in air with some shielded dose rates at 40 cm in water. Dose rate sensitivity estimates have been evaluated for a variety of MTR fuel assembly designs and for uncertainties in both the physical and analytical models of the fuel assemblies.

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15 p.

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INIS; OSTI as DE96002766

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  • 18. international meeting on reduced enrichment for research and test reactors, Paris (France), 18-21 Sep 1995

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  • Other: DE96002766
  • Report No.: ANL/TD/CP--88118
  • Report No.: CONF-9509253--3
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 145844
  • Archival Resource Key: ark:/67531/metadc623151

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Office of Scientific & Technical Information Technical Reports

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  • December 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Dec. 16, 2015, 5:15 p.m.

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Pond, R.B. & Matos, J.E. Photon dose rates from spent fuel assemblies with relation to self- protection, article, December 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc623151/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.