Application of a BEPU-based code assessment to the ATLAS upper head SB-LOCA test
The prevailing state of knowledge of two-phase flow in complex systems, as in the nuclear field, usually leads a certain degree of ad hoc calibration of computational models and the consequent inevitable subjectivity in analyses and assessments. The UPC-ANT Uncertainty Analysis methodology for code...
| Autores: | , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2021 |
| País: | España |
| Recursos: | Universitat Politècnica de Catalunya (UPC) |
| Repositório: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglês |
| OAI Identifier: | oai:upcommons.upc.edu:2117/352910 |
| Acesso em linha: | https://hdl.handle.net/2117/352910 https://dx.doi.org/10.1016/j.anucene.2021.108581 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Nuclear power plants -- Safety measures Nuclear energy -- Environmental aspects System code Code assessment SB-LOCA Integral test facility ATLAS facility Energia nuclear -- Aspectes ambientals Centrals nuclears -- Mesures de seguretat Àrees temàtiques de la UPC::Física |
| Resumo: | The prevailing state of knowledge of two-phase flow in complex systems, as in the nuclear field, usually leads a certain degree of ad hoc calibration of computational models and the consequent inevitable subjectivity in analyses and assessments. The UPC-ANT Uncertainty Analysis methodology for code assessment attempts to maintain scientifically desired features of models and analyses, by crediting BEPU analysis and centering the assessment criteria on T-H phenomenology rather than on safety criteria, as it is the usual practice. An SB-LOCA in the upper head is utilized as a case study, and global, chronological, FOMs and phenomenological analyses are carried out and illustrated briefly. Overall, it was concluded that the developed RELAP5 model reproduces all the relevant T-H phenomena to the investigated scenario, either partially or totally, and the BEPU methodology is generally adequate to perturb the underlying T-H phenomena. |
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