Comparative Analysis of Probabilistic Analysis and Deterministic Analysis by RESRAD Code

Sang June Park,Jihyang Byon,Seokyoung Ahn

doi:10.3390/en13081983

Sang June Park, Jihyang Byon + Show 1 more

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https://doi.org/10.3390/en13081983

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Journal: Energies	Publication Date: Apr 17, 2020
Citations: 1	License type: CC BY 4.0

Affiliation: Pusan National University

Abstract

The decommissioning of nuclear facilities indicates that the site is finally released according to a limited or unlimited site reuse purpose. In this process, the assessment of exposure dose to decommissioning workers and nearby residents is essential. Based on MARSSIM, a widely used decommissioning guideline in the United States, derivation of the exposure dose and derived concentration guideline level (DCGL) is mandatory using the probabilistic analysis of the RESRAD code. Here, DCGL is the radionuclide-specific concentration that satisfies the site release criteria. By applying the priority 1 parameter, which has the greatest effect on the dose, the dose is derived through deterministic and probabilistic analyses. The results were compared and analyzed. The purpose of this study was to provide a basic database that can be applied to the development of parameter lists and distributions suitable for the characteristics of nuclear facilities in South Korea. In addition, the process of deriving the dose by applying the deterministic and probabilistic analyses of RESRAD was assessed.

Highlights

In the decommissioning of nuclear facilities, there is a risk of radiation exposure to receptors due to the residual radioactivity of the site or building
The MARSSIM was developed by the US Department of Defense (DOD), US Department of Energy (DOE), Environmental Protection Energy (EPA), and US Nuclear Regulatory
It is expected to be applied to South Korea as it is applied to cases of decommissioning around the world

Summary

Introduction

In the decommissioning of nuclear facilities, there is a risk of radiation exposure to receptors due to the residual radioactivity of the site or building. According to the critical characteristics of the nuclear facilities’ decommissioning, it is necessary to carefully carry out the decommissioning process following the appropriate decommissioning instructions. The MARSSIM is a decommissioning guideline document that provides detailed guidance for planning, implementing, and evaluating environmental and radiological facility surveys conducted to demonstrate compliance with doseor risk-based regulations. The MARSSIM was developed by the US Department of Defense (DOD), US Department of Energy (DOE), Environmental Protection Energy (EPA), and US Nuclear Regulatory. The MARSSIM provides the following decommissioning steps: Historical site assessment (HSA), scoping survey, characterization survey, remedial action support survey, final status survey (FSS), regulatory agency confirmation, and verification

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