A model for operational risk of industrial facilities including ageing/test degradation effects and maintenance effectiveness
The paper presents a model for operational risk of industrial facilities with applications to nuclear power plants and uranium mining. The traditional models update the risk profile for specific operational conditions setting to one the failure probability of components which are known to be unavail...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Nuclear Engineering and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573324004443 |
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| author | S.F. Quintão Ribeiro J.J. Rivero |
| author_facet | S.F. Quintão Ribeiro J.J. Rivero |
| author_sort | S.F. Quintão Ribeiro |
| collection | DOAJ |
| description | The paper presents a model for operational risk of industrial facilities with applications to nuclear power plants and uranium mining. The traditional models update the risk profile for specific operational conditions setting to one the failure probability of components which are known to be unavailable by failure or maintenance, while constant mean unavailability values from the original Probabilistic Safety Analysis (PSA) are kept for the rest. The proposed methodology considers the time dependency of standby failure probabilities through instantaneous unavailability models, depending on the specific standby time for each component at the given moment, instead of using the same constant values. It also incorporates ageing, testing degradation effects and maintenance effectiveness, not explicitly considered in traditional models, as well as the instantaneous reevaluation of common cause failure probabilities. The results show significant risk underestimations when components specific standby times, ageing, testing degradation effects and maintenance effectiveness are not considered. |
| format | Article |
| id | doaj-art-f74aa794b944429fb17bd21bf26d70f9 |
| institution | Kabale University |
| issn | 1738-5733 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj-art-f74aa794b944429fb17bd21bf26d70f92025-01-31T05:11:05ZengElsevierNuclear Engineering and Technology1738-57332025-02-01572103196A model for operational risk of industrial facilities including ageing/test degradation effects and maintenance effectivenessS.F. Quintão Ribeiro0J.J. Rivero1Indústrias Nucleares do Brasil, Rio de Janeiro, Brazil; Corresponding author.Departamento de Engenharia Nuclear, Escola Politécnica, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, BrazilThe paper presents a model for operational risk of industrial facilities with applications to nuclear power plants and uranium mining. The traditional models update the risk profile for specific operational conditions setting to one the failure probability of components which are known to be unavailable by failure or maintenance, while constant mean unavailability values from the original Probabilistic Safety Analysis (PSA) are kept for the rest. The proposed methodology considers the time dependency of standby failure probabilities through instantaneous unavailability models, depending on the specific standby time for each component at the given moment, instead of using the same constant values. It also incorporates ageing, testing degradation effects and maintenance effectiveness, not explicitly considered in traditional models, as well as the instantaneous reevaluation of common cause failure probabilities. The results show significant risk underestimations when components specific standby times, ageing, testing degradation effects and maintenance effectiveness are not considered.http://www.sciencedirect.com/science/article/pii/S1738573324004443Operational riskPSACommon cause failureAgeingTest degradationTest efficiency |
| spellingShingle | S.F. Quintão Ribeiro J.J. Rivero A model for operational risk of industrial facilities including ageing/test degradation effects and maintenance effectiveness Nuclear Engineering and Technology Operational risk PSA Common cause failure Ageing Test degradation Test efficiency |
| title | A model for operational risk of industrial facilities including ageing/test degradation effects and maintenance effectiveness |
| title_full | A model for operational risk of industrial facilities including ageing/test degradation effects and maintenance effectiveness |
| title_fullStr | A model for operational risk of industrial facilities including ageing/test degradation effects and maintenance effectiveness |
| title_full_unstemmed | A model for operational risk of industrial facilities including ageing/test degradation effects and maintenance effectiveness |
| title_short | A model for operational risk of industrial facilities including ageing/test degradation effects and maintenance effectiveness |
| title_sort | model for operational risk of industrial facilities including ageing test degradation effects and maintenance effectiveness |
| topic | Operational risk PSA Common cause failure Ageing Test degradation Test efficiency |
| url | http://www.sciencedirect.com/science/article/pii/S1738573324004443 |
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