Human factors problems in causes of the JCO criticality accident
نویسندگان
چکیده
منابع مشابه
Lessons Learned from the Jco Nuclear Criticality Accident in Japan
FOREWORD Since the tragic Chernobyl accident in 1986, many improvements have been made in nuclear installations and in radiological protection. The state of nuclear and radiation safety has been very much enhanced in the last two decades by accumulation of experience and knowledge, and improvements to relevant technology and the global nuclear safety regime. However, in recent years some reoccu...
متن کاملSimple estimate of fission rate during JCO criticality accident
The fission rate during JCO criticality accident is estimated from fission-product (FP) radioactivities in a uranium solution sample taken from the preparation basin 20 days after the accident. The FP radioactivity data are taken from a report by JAERI released in the Accident Investigation Committee. The total fission number is found quite dependent on the FP radioactivities and estimated to b...
متن کاملInitial symptoms of acute radiation syndrome in the JCO criticality accident in Tokai-mura.
A criticality accident occurred on September 30, 1999, at the uranium conversion plant in Tokai-mura (Tokai-village), Ibaraki Prefecture, Japan. When the criticality occurred, three workers saw a "blue-white glow," and a radiation monitor alarm was sounded. They were severely exposed to neutron and gamma-ray irradiation, and subsequently developed acute radiation syndrome (ARS). One worker repo...
متن کاملSummary of the JCO criticality accident in Tokai-mura and a dose assessment.
A criticality accident occurred on September 30, 1999, in a conversion test facility at the JCO Tokai site. The accident was triggered by pouring an 18.8% enriched uranyl nitrate solution into a precipitation vessel beyond the critical mass. The accident continued for about 19 hours before the criticality could be stopped. during which time neutrons and gamma-rays were emitted continuously due ...
متن کاملTransport calculation of neutrons leaked to the surroundings of the facilities by the JCO criticality accident in Tokai-mura.
A transport calculation of the neutrons leaked to the environment by the JCO criticality accident was carried out based on three-dimensional geometrical models of the buildings within the JCO territory. Our work started from an initial step to simulate the leakage process of neutrons from the precipitation tank, and proceeded to a step to calculate the neutron propagation throughout the JCO fac...
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ژورنال
عنوان ژورنال: The Japanese journal of ergonomics
سال: 2005
ISSN: 0549-4974,1884-2844
DOI: 10.5100/jje.41.supplement_342