Passive gamma-ray spectrometry for the determination of total fission events in the JCO criticality accident '99 in Tokai

Toshiaki Mitsugashira, Mitsuo Hara, Takashi Nakanishi, Tsutomu Sekine, Riki Seki, Sadao Kojima

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The total number of fission events (TFE) in the JCO criticality accident was determined to be 3.43 x 1018 with a 3σ uncertainty of 0.73 x 1018 by passive observation of the gamma-rays of 95Zr, 103Ru and 140La- 140Ba from outside the Uranium Conversion Building. The TFE value is in fairly good agreement with the analytical result from the uranium solution taken from the precipitation vessel, as reported in NSC-Nov, 1999. The agreement implies that the criticality accident took place in a small limited volume and that the majority of the fission products were retained in the precipitation vessel. (C) 2000 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)21-26
Number of pages6
JournalJournal of Environmental Radioactivity
Volume50
Issue number1-2
DOIs
Publication statusPublished - 2000 Aug

Keywords

  • Gamma-ray spectrometry
  • JCO criticality accident
  • Passive measurement
  • Tokai-mura
  • Total fission events

ASJC Scopus subject areas

  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Fingerprint Dive into the research topics of 'Passive gamma-ray spectrometry for the determination of total fission events in the JCO criticality accident '99 in Tokai'. Together they form a unique fingerprint.

Cite this