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Belgian stress tests action plan ‐ 2012‐12‐14N° ENSREG Topic Source ENSREG Peer Review Recommendations and Suggestions Action description : Family ‐ subfamily ‐ sub‐subfamilyAction to beimplementedComment28 Design issuesENSREG compilation ofrecommendations, xCNSMultiple AccidentsThe enhancement of the capability for addressing accidents occurringsimultaneously on all plants of the site and consideration of the site as a wholefor a multi‐units site in the safety assessment.Emergency management ‐ Multi‐unit event and associatedorganization ‐ Organization and logisitics of internal emergencyplan in case of multi‐unit event213, 478, 504, 505,58129Design issuesENSREG compilation ofrecommendationsEquipment Inspection and Training ProgramsThe establishment of regular programs for inspections to ensure that a variety ofadditional equipment and mobile devices are properly installed and maintained,particularly for temporary and mobile equipment and tools used for mitigation ofBDB external events. Development of relevant staff training programmes fordeployment of such devices.Emergency management ‐ Requirements ‐ Harmonization of sitestraining programsEmergency management ‐ Requirements ‐ Specifications of mobilemeansExternal hazards ‐ Flooding ‐ Availability of the additionnal meansagainst extreme flooding400, 515, 516, 54130 Design issuesENSREG compilation ofrecommendationsFurther Studies to Address UncertaintiesThe performance of further studies in areas were there are uncertainties.Uncertainties may exist in the following areas:∙ The integrity of the SFP and its liner in the event of boiling or external impact.∙ The functionality of control equipment (feedwater control valves and SG reliefvalves, main steam safety valves, isolation condenser flow path, containmentSevere accident management ‐ RB protection ‐ Research &isolation valves as well as depressurisation valves) during the SBO to ensure thatDevelopment for severe accidentscooling using natural circulation would not be interrupted in a SBO.∙ The performance of additional studies to assess operation in the event ofwidespread damage, for example, the need different equipment (e.g. bulldozers)to clear the route to the most critical locations or equipment. This includes thelogistics of the external support and related arrangements (storage of equipment,use of national defence resources, etc.).183, 394, 513, 51831Severe accidentmanagementENSREG compilation ofrecommendationsWENRA Reference LevelsThe incorporation of the WENRA reference levels related to severe accidentmanagement (SAM) into their national legal frameworks, and ensure theirimplementation in the installations as soon as possible.The WENRA reference levels onSAM have already beentransposed into the Belgianregulatory framework (RoyalDecree of November 30th 2011)32Severe accidentmanagementENSREG compilation ofrecommendationsSAM Hardware ProvisionsAdequate hardware provisions that will survive external hazards (e.g. by means ofqualification against extreme external hazards, storage in a safe location) and thesevere accident environment (e.g. engineering substantiation and/orqualification against high pressures, temperatures, radiation levels, etc), in place,to perform the selected strategies.Emergency management ‐ Infrastructure ‐ On‐site resistantstorage for mobile meansEmergency management ‐ Requirements ‐ Specifications of mobilemeans400, 509, 515, 572,57333Severe accidentmanagementENSREG Compilation ofRecommendationsReview of SAM Provisions Following Severe External EventsThe systematic review of SAM provisions focusing on the availability andappropriate operation of plant equipment in the relevant circumstances, takingaccount of accident initiating events, in particular extreme external hazards andthe potential harsh working environment.Severe accident management ‐ Review SAMG procedures ‐ ReviewSevere Accident Mitigation Guidelines procedures189, 190, 191, 631,632Topics 1 to 35/7