report

Belgian stress tests action plan ‐ 2012‐12‐14No. Plant / Type Topic Sub‐family Sub‐sub family Action / ActivityRelatedrecommendation onEuropean level("Topics 1 to 3")Relatedrecommendation onnational level("Additional topics")StatusTarget Date437 KCD / PWR External hazardsExtreme weatherconditionsProtection against lightningProtection of all units against lightning in accordance with the newstandard NBN EN 62305(2009)In progress 31/12/2014438 KCD / PWR External hazardsExtreme weatherconditionsClearing procedures in case of snowDrafting of a procedure for the monitoring and removal of the snow ofa number of non‐bunkered buildings (see BEST report)In progress 30/06/2013439 KCD / PWR External hazards441 KCD12 / PWR External hazardsExtreme weatherconditionsExtreme weatherconditionsSewage capacity evaluation Sufficient draining capacity in case of heavy rainfalls 29 In progress 01/11/2012Confirmation of resistance to tornadoesThe robustness of the 2nd‐level emergency systems in Doel 1/2 shouldbe confirmed should a beyond design tornado with wind speedsexceeding 70 m/s occur5, 30 In progress 31/12/2013442 KCD34 / PWR External hazards EarthquakeRisk mitigation of internal flooding fromcirculation water circuitModifying the seismic management procedures to send out an agentas quickly as possible to check if the cooling tower is overflowing. If so,the CW pumps will be shut down rapidly.7 27 CLOSED 01/05/2012443 KCD / PWR External hazardsExtreme weatherconditionsSewage capacity evaluationRe‐evaluation of the capacity of the drainage system on the basis ofobserved rain intensities over long period (more than 1967‐1993(therefore earlier and later (also considering the exceptional rain of23/8/2011))) and making use of the model that also supposes short,violent and not only protracted rainfall with a period of recurrence of100 years.6 5, 29 In progress 31/12/2013444 KCD12 / PWR Water supply Total Station Black‐out Steam generator protectionsAlternative make‐up possibilities for safety‐related water reservoirs, ifnecessary with additional connection points.445 KCD34 / PWR Water supply Total Station Black‐out Steam generator protectionsAlternative make‐up possibilities for safety‐related water reservoirs, ifnecessary with additional connection points.446 KCD12 / PWR Water supply Total Station Black‐outFit shut‐off valves on the SP spray lines to be able to continue injectionAdditional means to assure primary waterwith the SP pumps to the SC circuit if the RC pressure becomes highsupply(D12)447 KCD34 / PWR Power supply RB protectionAdditional means to assure reactorbuilding backup spray in case ofoverpressure450 KCD12 / PWR Water supply Total loss of heat sinkOperationnal procedure to assureadditionnal primary water supply451 KCD34 / PWR Water supply Total loss of heat sinkOperationnal procedure to assureadditionnal primary water supply452 KCD12 / PWR Water supply Total loss of heat sink Backup heat sink453 KCD34 / PWR Water supply Total loss of heat sink Backup heat sinkProvide connection points on the containment spray pump intake andpitch and purchase of mobile pump to obtain alternative containmentspray flow rateUpdating procedures for alignment and start‐up of alternative watersupplyUpdating procedures for alignment and start‐up of alternative watersupplyUpdate procedures to optimize the use of the LU pools in case of amulti‐unit accidentUpdate procedures to optimize the use of the LU pools in case of amulti‐unit accident.In progress 30/11/2013In progress 30/11/2013In progress 30/11/2014In progress 30/11/2014In progress 30/11/2013In progress 30/11/201314 In progress 31/12/201214 In progress 31/12/2012454 KCD12 / PWR Water supply Loss of Main Heat Sink Backup heat sinkJustify that the available water capacity (volume and flow rate) of the2nd level is sufficient if all site units are affected by LUHS. If necessarycreate a strategy to optimize use.14 37 In progress 01/07/2013455 KCD34 / PWR Water supply Loss of Main Heat Sink Backup heat sinkJustify that the available water capacity (volume and flow rate) of the2nd level is sufficient if all site units are affected by LUHS. If necessarycreate a strategy to optimize use.14 37 In progress 01/07/2013Implementation of activities12/20