Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Monte Carlo simulation for verification of nonparametric tests used in final status surveys of MARSSIM at decommissioning of nuclear facilities

  • Sohn, Wook (Korea Hydro & Nuclear Power (KHNP) Central Research Institute) ;
  • Hong, Eun-hee (Korea Hydro & Nuclear Power (KHNP) Central Research Institute)
  • Received : 2020.06.01
  • Accepted : 2020.10.22
  • Published : 2021.05.25
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Abstract

In order to verify the statistical performance of the nonparametric tests used in the MARSSIM approach, all plausible contamination distribution types that can be encountered in a survey area should be investigated. As the first of such investigations, this study aims to perform the verification for normal distribution of the contamination in a survey area by simulating the collection of random samples from it through the Monte Carlo simulation. The results of the simulations conducted for a total of 81 simulation cases showed that Sign test and WRS test both exhibited an excellent statistical performance: 100% for the former and 98.8% for the latter. Therefore, in final status surveys of the MARSSIM approach, a high statistical performance can be expected in applying the nonparametric hypothesis tests to survey areas whose net contamination can be assumed to be normally distributed.

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References

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