Analysis of a Uranium Solution for Evaluating the Total Number of Fissions in the JCO Criticality Accident in Tokai-mura
2001; Oxford University Press; Volume: 42; Issue: SUPPL Linguagem: Inglês
10.1269/jrr.42.s11
ISSN1349-9157
AutoresGunzo Uchiyama, Kazuo Watanabe, Masakatsu Miyauchi, Yoshihiro Togashi, Yoshinori Nakahara, Hiroyuki Fukaya, Jun Inagawa, DAISKE SUZUKI, Takashi Sonoda, Nobuaki Kohno, Katsubumi Gunji, Mitsuo Itô, Takeshi Sato,
Tópico(s)Nuclear and radioactivity studies
ResumoThe uranium solution in the precipitation tank in the JCO's uranium conversion facility was analyzed in order to evaluate the total number of fissions in the criticality accident. Two analytical groups at JAERI performed chemical analyses independently in order to check the validity of the results: the concentration of the fission products (95Zr, 99Mo, 103Ru, 131I, 140Ba, etc), uranium, boron and impurity elements in the solution. The analytical results obtained by the two groups were almost in agreement within the analytical error. The number of fissions per one gram of uranium in the accident was determined to be (1.5 +/- 0.1 ) x 10(14). Also, the total number of events was evaluated to be (2.5 +/- 0.1) x 10(18) fissions using the total amount of uranium (16.6 kg) fed into the precipitation tank at the accident.
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