Possible accident scenarios related to the Spent Fuel Pool operating events

After the accident in Fukushima Daiichi NPP, Nuclear Energy Agency Committee on Safety of Installations (OECD/NEA CSNI) initiated activities to address some technical issues. As a one results, Status report Spent Fuel Pools (SFPs) under Loss Cooling Accident Conditions was created. To give valuable contribution post-Fukushima decision making process, brief summaries were produced on:
 - The status SFP and mitigation strategies;
 Assessment current experimental analytical knowledge about loss cooling accidents SFPs their associated strengths weaknesses methods used codes predict evolution assess efficiency different mechanisms for such accidents;
 Identification additional research required gaps understanding relevant phenomenological processes, where tool deficiencies exist, reduce uncertainties this understanding.
 final approved by OECD/NEA CSNI December 2014 with reference NEA/CSNI/R(2015)2 it is available download OECD website http://www.oecdnea. org/nsd/docs/2015/csni-r2015-2.pdf. Joint Research Centre European Commission took leading role creation chapter possible scenarios, past precursor events. Evaluations events has been lost show that malfunctions system are most cases caused inoperable pumps. other important causes inadvertent diversion coolant flow ultimate heat sink. This paper providing short general overview more details JRC contribution.