Uncertainty Quantification of the PHEBUS FPT-1 Test Modelling Results

One of the biggest experimental programs helping to improve nuclear installation safety is PHEBUS, an international cooperative research program that provides data for validating computer codes dedicated to the analysis of severe accidents and their calculation results. In the European Union, HORIZO...

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Autores principales:	Noura Elsalamouny, Tadas Kaliatka
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	PHEBUS-FPT1 RELAP/SCDAPSIM SUSA uncertainty and sensitivity CORSOR-M Technology T
Acceso en línea:	https://doaj.org/article/89aaaf08fc26416c9c3199c1b2552b87
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spelling	oai:doaj.org-article:89aaaf08fc26416c9c3199c1b2552b872021-11-11T16:03:00ZUncertainty Quantification of the PHEBUS FPT-1 Test Modelling Results10.3390/en142173201996-1073https://doaj.org/article/89aaaf08fc26416c9c3199c1b2552b872021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7320https://doaj.org/toc/1996-1073One of the biggest experimental programs helping to improve nuclear installation safety is PHEBUS, an international cooperative research program that provides data for validating computer codes dedicated to the analysis of severe accidents and their calculation results. In the European Union, HORIZON 2020 EURATOM project MUSA (Management and Uncertainties of Severe Accidents) is in progress. Modelling of the PHEBUS FPT-1 test within the frame of this project is provided by project partners using different severe accident codes. Uncertainty quantification of the received results is provided using different methods and statistical tools. The Lithuanian Energy Institute (LEI) is taking part in the MUSA project and this uncertainty exercise. LEI is using the RELAP/SCDAPSIM severe accident code together with GRS methodology and SUSA statistical tool to evaluate the uncertainties of modelling results of PHEBUS FPT-1 test. In this article, uncertainty quantification of the PHEBUS FPT-1 test modelling results provided by LEI in the frame of MUSA project are presented. Provided uncertainty analysis for total hydrogen generation showed that upper and lower uncertainty limits are bounding the experimental data. At the end of the calculation, the upper and lower uncertainty limits of calculations are within the band of experimental uncertainties. Uncertainty analysis for Cs/I release fraction showed that uncertainty limits are bounding experimental data until the middle of the heat-up phase, but at the end of the experiment, the calculated upper uncertainty limit is lower than the experimental data. Results of sensitivity analysis showed that the thermal conductivity of the ZrO<sub>2</sub> layer of the shroud has the dominant influence on hydrogen generation and Cs/I release fraction calculation results. Other important parameters are changing at the different experimental phases. In the future, it is planned to update the RELAP/SCDAPSIM model for the PHEBUS FPT-1 test using the results of the provided sensitivity analysis. This will allow a better agreement with experimental data.Noura ElsalamounyTadas KaliatkaMDPI AGarticlePHEBUS-FPT1RELAP/SCDAPSIMSUSAuncertainty and sensitivityCORSOR-MTechnologyTENEnergies, Vol 14, Iss 7320, p 7320 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	PHEBUS-FPT1 RELAP/SCDAPSIM SUSA uncertainty and sensitivity CORSOR-M Technology T
spellingShingle	PHEBUS-FPT1 RELAP/SCDAPSIM SUSA uncertainty and sensitivity CORSOR-M Technology T Noura Elsalamouny Tadas Kaliatka Uncertainty Quantification of the PHEBUS FPT-1 Test Modelling Results
description	One of the biggest experimental programs helping to improve nuclear installation safety is PHEBUS, an international cooperative research program that provides data for validating computer codes dedicated to the analysis of severe accidents and their calculation results. In the European Union, HORIZON 2020 EURATOM project MUSA (Management and Uncertainties of Severe Accidents) is in progress. Modelling of the PHEBUS FPT-1 test within the frame of this project is provided by project partners using different severe accident codes. Uncertainty quantification of the received results is provided using different methods and statistical tools. The Lithuanian Energy Institute (LEI) is taking part in the MUSA project and this uncertainty exercise. LEI is using the RELAP/SCDAPSIM severe accident code together with GRS methodology and SUSA statistical tool to evaluate the uncertainties of modelling results of PHEBUS FPT-1 test. In this article, uncertainty quantification of the PHEBUS FPT-1 test modelling results provided by LEI in the frame of MUSA project are presented. Provided uncertainty analysis for total hydrogen generation showed that upper and lower uncertainty limits are bounding the experimental data. At the end of the calculation, the upper and lower uncertainty limits of calculations are within the band of experimental uncertainties. Uncertainty analysis for Cs/I release fraction showed that uncertainty limits are bounding experimental data until the middle of the heat-up phase, but at the end of the experiment, the calculated upper uncertainty limit is lower than the experimental data. Results of sensitivity analysis showed that the thermal conductivity of the ZrO<sub>2</sub> layer of the shroud has the dominant influence on hydrogen generation and Cs/I release fraction calculation results. Other important parameters are changing at the different experimental phases. In the future, it is planned to update the RELAP/SCDAPSIM model for the PHEBUS FPT-1 test using the results of the provided sensitivity analysis. This will allow a better agreement with experimental data.
format	article
author	Noura Elsalamouny Tadas Kaliatka
author_facet	Noura Elsalamouny Tadas Kaliatka
author_sort	Noura Elsalamouny
title	Uncertainty Quantification of the PHEBUS FPT-1 Test Modelling Results
title_short	Uncertainty Quantification of the PHEBUS FPT-1 Test Modelling Results
title_full	Uncertainty Quantification of the PHEBUS FPT-1 Test Modelling Results
title_fullStr	Uncertainty Quantification of the PHEBUS FPT-1 Test Modelling Results
title_full_unstemmed	Uncertainty Quantification of the PHEBUS FPT-1 Test Modelling Results
title_sort	uncertainty quantification of the phebus fpt-1 test modelling results
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/89aaaf08fc26416c9c3199c1b2552b87
work_keys_str_mv	AT nouraelsalamouny uncertaintyquantificationofthephebusfpt1testmodellingresults AT tadaskaliatka uncertaintyquantificationofthephebusfpt1testmodellingresults
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Uncertainty Quantification of the PHEBUS FPT-1 Test Modelling Results

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