The progressive aging of nuclear power plants (NPPs) in the world is a relevant issue for the nuclear industry. The radiological characterization of the reactor is usually performed using a combination of sampling campaigns and computer simulations, and the latter are particularly useful if measurements are limited. This paper describes the development of a four-step, hybrid Monte Carlo/deterministic calculation scheme to evaluate the residual activation of a pressurized water reactor, focusing the analysis on the Enrico Fermi power plant in Italy. The scheme performance is evaluated using the ratio between the calculated specific activities and the measured ones (C/M ratio) for each point and isotope considered. The overall performance is satisfactory, as the scheme provides conservative results with a good accuracy, without excessive overestimations. The present computational scheme can be adapted to study the lifetime of a NPP, thus providing a useful support tool for the dismantling process in NPPs

Hybrid Monte Carlo/deterministic activation calculation to support the decommissioning of PWRs: Validation against data from the thermal shield of the Enrico Fermi NPP / Bleynat, S.; Dulla, S.; Pancotti, F.; Ricci, L.; Vicini, C.; Zanino, R.. - In: ANNALS OF NUCLEAR ENERGY (ONLINE). - ISSN 1873-2100. - ELETTRONICO. - 181:(2023), pp. 1-12. [10.1016/j.anucene.2022.109527]

Hybrid Monte Carlo/deterministic activation calculation to support the decommissioning of PWRs: Validation against data from the thermal shield of the Enrico Fermi NPP

S. Bleynat;S. Dulla;R. Zanino
2023

Abstract

The progressive aging of nuclear power plants (NPPs) in the world is a relevant issue for the nuclear industry. The radiological characterization of the reactor is usually performed using a combination of sampling campaigns and computer simulations, and the latter are particularly useful if measurements are limited. This paper describes the development of a four-step, hybrid Monte Carlo/deterministic calculation scheme to evaluate the residual activation of a pressurized water reactor, focusing the analysis on the Enrico Fermi power plant in Italy. The scheme performance is evaluated using the ratio between the calculated specific activities and the measured ones (C/M ratio) for each point and isotope considered. The overall performance is satisfactory, as the scheme provides conservative results with a good accuracy, without excessive overestimations. The present computational scheme can be adapted to study the lifetime of a NPP, thus providing a useful support tool for the dismantling process in NPPs
File in questo prodotto:
File Dimensione Formato  
Final.pdf

Open Access dal 10/11/2024

Tipologia: 2. Post-print / Author's Accepted Manuscript
Licenza: PUBBLICO - Tutti i diritti riservati
Dimensione 1.36 MB
Formato Adobe PDF
1.36 MB Adobe PDF Visualizza/Apri
Paper_compressed.pdf

non disponibili

Tipologia: 2a Post-print versione editoriale / Version of Record
Licenza: Non Pubblico - Accesso privato/ristretto
Dimensione 737.21 kB
Formato Adobe PDF
737.21 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2972932