Reconsideration of the Theoretical Supplementation of Decay Data in Fission Product Decay Heat Summation Calculations (II)

Naoto Hagura, Takahiro Tachibana, Tadashi Yoshida

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Abstract

In our previous paper, the theoretical overcorrection in JENDL FP Decay Data File 2000 for the decay heat summation calculation was suggested. In order to eliminate this, we redefined the criteria of applying the theoretical values to average energy release per decay, that is, Eβ and Eγ values. Furthermore, the results of the TAGS (total absorption gamma ray spectrometer) measurements up to the newest ones are adopted into the decay heat calculations. As a result, we obtained a reasonable agreement between the calculation and the sample irradiation experiments, not only for 239Pu but for 233,235,238U and 241Pu. The present revision of the FP decay data file will provide us with a reasonable starting point for the future revision of the decay data file by introducing the results from the TAGS effort now in progress. In addition, the effects of the so-called pandemonium problem are clearly demonstrated and this also affects the conventional decay schemes, especially for the short-lived FP nuclides having large β-decay Qβ-values.

Original languageEnglish
Pages (from-to)492-500
Number of pages9
JournalJournal of Nuclear Science and Technology
Volume47
Issue number5
DOIs
Publication statusPublished - 2010

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Keywords

  • Beta strength
  • Decay data
  • Fission product
  • Fission product
  • Gamma ray spectroscopy
  • JENDL
  • Pandemonium
  • TAGS

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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