Extrapolation of surveillance dosimetry information to predict pressure vessel fluences

J.J. Wagschal, R.E. Maerker, Y. Yeivin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The traditional method of extrapolating comparisons between measured and calculated saturated foil activities at a surveillance position located near a reactor pressure vessel is to normalize the calculated fluxes to the unfolded measurements and assume the fluxes at the pressure vessel may be scaled by the same factors. A new method for obtaining both the fluence and an estimate of its uncertainty at any position extrapolated from information obtained at a surveillance position has been formulated. The technique involves a least-squares adjustment of the more sensitive nuclear data used, the measured activations, and the biases arising from methods approximations, followed by a corresponding modification of the calculated extrapolated fluence. Adjustment of the calculated fluence at the surveillance position is not necessary.
Original languageEnglish
Title of host publicationTrans. Am. Nucl. Soc. (USA)
Subtitle of host publicationConference: American Nuclear Society annual meeting, Las Vegas, NV, USA, 8 Jun 1980
Place of PublicationUSA
Pages631 - 2
StatePublished - 1980

Bibliographical note

surveillance dosimetry information;pressure vessel fluences;saturated foil activities;calculated fluxes;unfolded measurements;least-squares adjustment;


  • dosimetry
  • fission reactor safety


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