On the Reactivity Effects of Nuclear Fuel Fragmentation with Reference to the Chernobyl Accident
作者:
RajamäkiMarkku,
WasastjernaFrej,
期刊:
Nuclear Science and Engineering
(Taylor Available online 1989)
卷期:
Volume 101,
issue 1
页码: 41-47
ISSN:0029-5639
年代: 1989
DOI:10.13182/NSE89-A23593
出版商: Taylor&Francis
数据来源: Taylor
摘要:
AbstractThe reactivity effects caused by fragmentation of nuclear fuel and by simultaneous cooling of the fragments are described. A series of light water reactor (LWR) cases and three speculative scenarios for the Chernobyl accident are considered. Calculations were carried out with the LWR cell burnup code CASMO-HEX.Fragmentation is described by increasing the number of fuel pieces while decreasing their diameter. Cooling is considered to occur as quasi-stationary. Relative movement of the fragments and the coolant is taken into account by varying the water/fuel ratio.Under certain circumstances, substantial reactivity increases are found to occur in both reactor types. These may have contributed significantly to the severity of the Chernobyl accident.
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