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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 beimplementedComment41Severe accidentmanagementENSREG compilation ofrecommendations, xCNSPresence of Hydrogen in Unexpected PlacesThe preparation for the potential for migration of hydrogen, with adequatecountermeasures, into spaces beyond where it is produced in the primarycontainment, as well as hydrogen production in SFPs.Severe accident management ‐ H2 risk ‐ H2 concentration followupin reactor buildingSevere accident management ‐ H2 risk ‐ H2 risk management innuclear auxiliary building192, 193, 194, 201,202, 203, 512, 60742Severe accidentmanagementENSREG compilation ofrecommendationsLarge Volumes of Contaminated WaterThe conceptual preparations of solutions for post‐accident contamination andthe treatment of potentially large volumes of contaminated water.Emergency Management ‐ Multi‐unit event and associtedorganization ‐ Post accident fixing of contamination and thetreatment of potentially large volumes of contaminated water633,63443Severe accidentmanagementENSREG compilation ofrecommendationsRadiation ProtectionThe provision for radiation protection of operators and all other staff involved inthe SAM and emergency arrangements.Emergency management ‐ Multi‐unit event and associatedorganization ‐ Complementary means for radiological surveillanceSevere accident management ‐ Radiological release ‐ Leak pathidentification172, 392, 477, 523,524, 574, 57544Severe accidentmanagementENSREG compilation ofrecommendationsOn Site Emergency CenterThe provision of an on‐site emergency center protected against severe naturalhazards and radioactive releases, allowing operators to stay onsite to manage asevere accident.Emergency management ‐ Infrastructure ‐ Site operation center inthe new Access Control Building171Additional actions are part of theman made events part of theaction plan45Severe accidentmanagementENSREG compilation ofrecommendationsSupport to Local OperatorsRescue teams and adequate equipment to be quickly brought on site in order toprovide support to local operators in case of a severe situation.Emergency management ‐ Multi‐unit event and associatedorganization ‐ Optimization and storage of mobile meansEmergency management ‐ Multi‐unit event and associatedorganization ‐ Organization and logisitics of internal emergencyplan in case of multi‐unit event213, 478, 504, 505,581, 479, 56046Severe accidentmanagementENSREG compilation ofrecommendationsLevel 2 Probabilistic Safety Assessments (PSAs)A comprehensive Level 2 PSA as a tool for the identification of plantvulnerabilities, quantification of potential releases, determination of candidatehigh‐level actions and their effects and prioritizing the order of proposed safetyimprovements. Although PSA is an essential tool for screening and prioritisingimprovements and for assessing the completeness of SAM implementation, lownumerical risk estimates should not be used as the basis for excluding scenariosfrom consideration of SAM especially if the consequences are very high.A level 2 PSA model is availablefor the Belgian units47Severe accidentmanagementENSREG compilation ofrecommendationsSevere Accident StudiesThe performance of further studies to improve SAMGs.Severe accident management ‐ RB protection ‐ Research &Development for severe accidents183, 394, 513, 51848Severe accidentmanagementxCNS Containment venting for new NPPs Not applicable /Topics 1 to 37/7