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Technical bases for estimating fission product behaviour during LWR accidents (1981)

Author	US NRC
Date	June 1981
Classification	6.01.3.90/10 (NUCLEAR SAFETY - SOURCETERM)
Front

ABSTRACT

The objective of this report is to provide the Nuclear Regulatory Commission and 
the public with a description of the best technical information currently available 
for estimating the release of radioactive material during postulated severe accidents 
in commercial light water reactor nuclear power plants. This report focuses on a 
spectrum of postulated accidents ranging from minor fuel damage to severe core 
damage and core meltdown. Particular emphasis is placed on the accident behavior 
of radioactive iodine since: (1) radioiodine is predicted to be a major contributor to 
public exposure, (2) current regulatory accident analysis procedures focus on iodine, 
and (3) several technical questions have recently been raised about the magnitude 
of iodine release. The generation, transport, and attenuation of aerosols were also 
investigated in some detail to assess their effect on fission product release estimates 
and to determine the performance of engineered safety features under accident 
conditions exceeding their design bases.

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