A QUANTITATIVE RISK ASSESSMENT DESCRIPTION OF A RADIONUCLIDE SOURCE TERM

摘要

The purpose of this paper is to provide a numerical illustration of the details of the calculation of the release rate of a radionuclide from nuclear waste in a geologic repository using the quantitative-risk-assessment (QRA) approach described by Garrick.1 This illustration is based on a hypothetical set of three events that can result in the release of radionuclides to the near-field environment which is defined as immediately outside a waste package. Two of these events are based on reality, one is strictly hypothetical. The reason for providing the numerical detail is to aid in illustrating how results are obtained, what the form of the results are, and the mathematical and numerical information required to obtain the results. The QRA result is in the form of a "probability of frequency" (POF) radionuclide release rate from the waste. This release rate is sometimes called the "source term."