Calculation of Doppler Coefficient and Other Safety Parameters for a Large Fast Oxide Reactor

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Several safety parameters are calculated for a large, fast, Na-cooled, oxide-fueled reactor. The Doppler coefficient is studied as regards its effect on the reactivity during a power excursion, and its dependence on the neutron spectrum, on the concentrations of U/sup 238/, Pu /sup 239/ , a nd Pu/sup 240/, on spatial temperature and power distributions, and on temperature. Other parameters studied include the Na temperature coefficient of reactivity, and the reactivity insertion caused by total Na loss; reactivity coefficients caused by thermal expansion of fuel and steel cladding; the excess operating reactivity; and the reactivity caused by a fuel slump. … continued below

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43 pages

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Greebler, P.; Hutchins, B. A. & Sueoka, J. R. March 23, 1961.

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Description

Several safety parameters are calculated for a large, fast, Na-cooled, oxide-fueled reactor. The Doppler coefficient is studied as regards its effect on the reactivity during a power excursion, and its dependence on the neutron spectrum, on the concentrations of U/sup 238/, Pu /sup 239/ , a nd Pu/sup 240/, on spatial temperature and power distributions, and on temperature. Other parameters studied include the Na temperature coefficient of reactivity, and the reactivity insertion caused by total Na loss; reactivity coefficients caused by thermal expansion of fuel and steel cladding; the excess operating reactivity; and the reactivity caused by a fuel slump. The effects of a Be reflector on neutron lifetimes are determined. The safety aspects are balanced against economic considerations. (T.F.H.)

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43 pages

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  • Other Information: Orig. Receipt Date: 31-DEC-61

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  • March 23, 1961

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  • Jan. 22, 2018, 7:23 a.m.

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Greebler, P.; Hutchins, B. A. & Sueoka, J. R. Calculation of Doppler Coefficient and Other Safety Parameters for a Large Fast Oxide Reactor, report, March 23, 1961; United States. (https://digital.library.unt.edu/ark:/67531/metadc1061219/: accessed December 2, 2023), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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