Accounting for changing source distributions in light water reactor surveillance dosimetry analysis

Journal Article · Mon Dec 01 04:00:00 EST 1986 · Nucl. Sci. Eng.; (United States)

OSTI ID:6754906

Maerker, R E; Williams, M L; Broadhead, B L

A technique is described to account for effects of space- and time-dependent core source variations on pressure vessel surveillance dosimetry analysis. The procedure first defines an easily implemented geometry for a single adjoint transport calculation. The results from the adjoint calculation can then be combined with those from a single forward calculation, in conjunction with an adjoint scaling technique, to yield activities and pressure vessel fluxes simultaneously for a wide range of source distributions, dosimeter response functions, and detector locations. This method has been implemented in the LEPRICON code system for vessel fluence determination. An application to an R-theta model of an operating power reactor shows that effects of source perturbations resulting in 20% changes in the core leakage can be predicted within -- 3% at both downcomer and cavity dosimeter locations, for six different dosimeters, by choice of a single suitable adjoint response function.

• Research Organization: Oak Ridge National Lab., P.O. Box X, Oak Ridge, TN 37831
• OSTI ID: 6754906
• Journal Information: Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 94:4; ISSN NSENA
• Country of Publication: United States
• Language: English

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