An update of the probabilistic safety assessment of the Radiation Monitor Calibration Laboratory of a Brazilian nuclear power station
| Autor: | E. C. Gomes, P.F. Frutuoso e Melo, A.S.M. Alves, E.M. Passos |
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| Rok vydání: | 2007 |
| Předmět: |
Event tree
Exponential distribution Computer science business.industry Health Toxicology and Mutagenesis Bayesian probability Public Health Environmental and Occupational Health Probabilistic logic Nuclear power Reliability engineering Radiological weapon Radiation monitoring business Human reliability |
| Zdroj: | International Journal of Low Radiation. 4:136 |
| ISSN: | 1741-9190 1477-6545 |
| Popis: | In 2001, a probabilistic safety assessment of the Radiation Monitor Calibration Laboratory of a Brazilian nuclear power station was performed to estimate its radiological risk. Owing to the lack of data, many conservative assumptions were considered. The purpose of this paper is to obtain the updated laboratory radiological risk. A human reliability analysis of the procedure for calibrating the monitors was performed by applying the Technique for Human Error Rate Prediction (THERP) methodology. For facing the lack of failure data, the Bayesian approach was used for the calculation of the irradiator failure probability. The exponential distribution was used to model the failure times of the electronic dosimeters. The radiological risk was obtained through an event tree, in which all relevant scenarios were considered. Although more accident scenarios were considered in the analysis, like external events, the approach was by no means conservative, and a radiological risk about one order of magnitude smaller was obtained. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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