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KMID : 0371819980300030235
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Nuclear Engineering and Technology
1998 Volume.30 No. 3 p.235 ~ p.244
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Use of MAAP in Generating Accident Source Term Parameters
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Kim, Jong Wok
Yun, Joeng Ik/Kang, Chang Sun
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Abstract
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The parametric model method determines the accident source term which is presented by a set of source term parameters. In this method, the cumulative distribution of each source term parameter should be derived for its uncertainty analysis. This paper introduces a method of generating the parameters in the form of cumulative distribution using MAAP version 4.0. In MAAP, there are model parameters which could incorporate uncertain physical and/or chemical phenomena. In general, the model parameters do not have a point value but a range. In this paper, considering that, the input values of model parameters influencing each parameter are sampled using LHS. Then, the computation results are shown in cumulative distribution form.
For a case study, the CDFs of FCOR and FVES of Kori Unit 1 are derived. The target scenarios for the computation are the ones whose initial events are large LOCA, small LOCA and transient, respectively. It is found that the computed CDF s in this study are consistent to those of NUREG-1150 and the use of MAAP is proven to be adequate in assessing the parameters of the severe accident source term.
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KEYWORD
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