MYRRHA/FASTEF Safety Analysis in Sub-critical and Critical Mode

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FP7 Central Design Team (CDT) has been launched in April 2009. CDT’s main target is to finalize a preliminary design of a new version of the MYRRHA reactor, named MYRRHA/FASTEF. The main purpose of the analysis is to verify the capability of the safety systems to bring the reactor to a safe shutdown state after a postulated accidental event. The safety analysis will focus on three different categories of transient events, including protected transients to analyze the protection system and decay heat removal (DHR) system capabilities, protected transients to analyze the overcooling risk and unprotected transients to analyze protection requirements. Safety analysis has been performed by creating a complete model of the facility based on the updated design. The model includes primary, secondary and tertiary systems and all foreseen DHR systems. The MYRRHA/FASTEF model has been made using the RELAP5 mod 3.3 system code in a specific version modified by ENEA (tested in benchmark problems through code-to-code comparisons). Despite of this, the MYRRHA/FASTEF design proved to be able to brilliantly lead the system to a safe shutdown conditions in case of protected accidents, with no risk of clad failure, and limited clad failure risk in case of unprotected accidents.


Original languageEnglish
Title of host publicationNURETH-15 Book of Abstracts
Place of PublicationPisa, Italy
Publication statusPublished - 13 May 2013
EventNURETH 2015- 16th International Topical Meeting on Nuclear Reactor Thermalhydraulics - ANS, IAEA, University of Pisa, Pisa, Italy
Duration: 12 May 201317 May 2013


ConferenceNURETH 2015- 16th International Topical Meeting on Nuclear Reactor Thermalhydraulics


  • MYRRHA FASTEF Generation IV safety analysis transient LBE

ID: 287154