Conference
Reliability of Passive Systems: The 'extreme' cases analysis
| العنوان: | Reliability of Passive Systems: The 'extreme' cases analysis |
|---|---|
| المؤلفون: | Bellomo A., Di Palma G., Spina G., Lanfredini M., D'Auria F. |
| المساهمون: | D'Auria F., Bellomo, A., Di Palma, G., Spina, G., Lanfredini, M., D'Auria, F. |
| بيانات النشر: | Universià di Pisa ITA Pisa |
| سنة النشر: | 2019 |
| المجموعة: | ARPI - Archivio della Ricerca dell'Università di Pisa |
| مصطلحات موضوعية: | Passive systems in nuclear reactor technology, reliability of Thermal-hydraulic performance of passive systems REPAS method, RMPS method, figure of merti to establish the reliability of passive systems |
| الوصف: | The operation of a passive system is more sensitive to initial and boundary conditions with respect to an active system with a similar mission; this is due to the dependence of the system upon the driving thermal-hydraulic phenomena (e.g. natural circulation). Moreover, during the start-up and the operation phases, the system passes through several different operating conditions that may in turn affect its behavior. For these reasons, the evaluation of the reliability of a passive system needs specific methodologies that consider also the reliability of the involved thermal-hydraulic phenomena. The objective of the activity carried out by UNIPI and POLITO, summarized in this section, is to show the results of the application of an assessment method, consistent with the technology available nowadays, considering not only the behavior of a stand-alone passive system as mostly done in the past, see e.g. D’Auria & Galassi, 2000, but also its interaction with the reactor system during the evolution of a selected DBA. The activity aims to show the capability of the procedure rather than to assess the reliability of the system. The elements for the proposed activity are presented here after: 1. Method to evaluate the reliability of passive systems – A simplified application of the REPAS methodology was pursued. Only deterministically selected cases, so called "extreme cases” have been performed. Examples of full application of the methodology, which include also cases selected by a probabilistic analysis, are described in D’Auria et al., 2000, and IAEA, 2014b. 2. Best estimate SYS-TH code – The well-known RELAP5/MOD3.3 code, RELAP5/MOD3.3, 2003, has been selected. 3. Qualified model of a passive system – A TH model of a passive system, which has the key characteristic of a typical Isolation Condenser, has been derived and validated based on the PERSEO benchmark activity carried out in the framework of this Task Group. The configuration of this passive system has some differences from PERSEO (described in section ... |
| نوع الوثيقة: | conference object |
| وصف الملف: | ELETTRONICO |
| اللغة: | English |
| Relation: | ispartofbook:OECD/NEA/CSNI-WGAMA 3rd meeting of Pssive systems group of experts; 3rd Meeting of OECD/NEA/CSNI Passive system expert group; volume:1; issue:2; firstpage:1; lastpage:24; numberofpages:24; alleditors:D'Auria F.; http://hdl.handle.net/11568/1017838; www.oecd-nea.org > passive systems |
| الاتاحة: | http://hdl.handle.net/11568/1017838 |
| رقم الانضمام: | edsbas.B404ADC8 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |