Auxiliary feedwater system risk-based inspection guide for the Diablo Canyon Unit 1 Nuclear Power Plant

Abstract

This report was prepared as an account of work sponsored by an agency of the United States l'repat'ed by Government. Neither tile United States Government nor any agency thereof, nor any of their B, ]:, (Jl_re, 'l' V, V(L 1), (J, [-{arl'is(m employees, makes any warranty, express or implied, or assumes any legal liability or responsi. bility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise dees not necessarily constitute or imply its endorsement, recom-P;:tcit'ic Nurthwest l_tbcwatcwy mendatJon, or favoring by the United States Government ur any agency thereof, The views Richland, WA 99352 and t_pil_ions of authors expressed herein do not necessarily state or reflect those of the United _tates Government or any agency thereof. Prepared for Division of Radiation Protection and Emergency Preparedness ()fflee of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555 NRC FIN LI310 This information permits an inspector to concentrate on components important to the preventionof core damage, However, it is Importantto note that inspectionsshould not focus exclusivelyon these components, Other components which perform essential functions,but which are not included because of high reliabilityor redundancy,must also be addressed to ensure that degredation does not increase their failureprobabilities,and hence their risk importances.