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

doi:10.1016/S0265-931X(00)00056-4

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 journal › Article › peer-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 language	English
Pages (from-to)	21-26
Number of pages	6
Journal	Journal of Environmental Radioactivity
Volume	50
Issue number	1-2
DOIs	https://doi.org/10.1016/S0265-931X(00)00056-4
Publication status	Published - 2000 Aug
Externally published	Yes

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

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10.1016/S0265-931X(00)00056-4

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@article{711f22c208ab46ee83f2ce63aa39c55c,

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

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.",

keywords = "Gamma-ray spectrometry, JCO criticality accident, Passive measurement, Tokai-mura, Total fission events",

author = "Toshiaki Mitsugashira and Mitsuo Hara and Takashi Nakanishi and Tsutomu Sekine and Riki Seki and Sadao Kojima",

note = "Funding Information: Part of the cost of this study was covered by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan (No.10480024).",

year = "2000",

month = aug,

doi = "10.1016/S0265-931X(00)00056-4",

language = "English",

volume = "50",

pages = "21--26",

journal = "Journal of Environmental Radioactivity",

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T1 - Passive gamma-ray spectrometry for the determination of total fission events in the JCO criticality accident '99 in Tokai

AU - Mitsugashira, Toshiaki

AU - Hara, Mitsuo

AU - Nakanishi, Takashi

AU - Sekine, Tsutomu

AU - Seki, Riki

AU - Kojima, Sadao

N1 - Funding Information: Part of the cost of this study was covered by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan (No.10480024).

PY - 2000/8

Y1 - 2000/8

N2 - 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.

AB - 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.

KW - Gamma-ray spectrometry

KW - JCO criticality accident

KW - Passive measurement

KW - Tokai-mura

KW - Total fission events

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JF - Journal of Environmental Radioactivity

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ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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