Energia i regulacje · 24/02/2003

Notice of Opportunity To Comment on Model Safety Evaluation on Technical Specification Improvement Regarding Scram Discharge Volume Vent and Drain Valves Actions for Boiling Water Reactors Using the Consolidated Line Item Improvement Process

Notice is hereby given that the staff of the Nuclear Regulatory Commission (NRC) has prepared a model safety evaluation (SE) relating to a change in the technical specification (TS) required actions for inoperable vent and drain valves for the scram discharge volume (S.V.) for boiling water reactors (BWRs). This proposed change was proposed for incorporation into the standard technical specifications (STS) by the BWR Owners Group (BWROG) participants in the Technical Specification Task Force (TSTF) and is designated TSTF- 404, Revision 0. The proposed change to TS would allow isolation of one or more S.V. vent or drain lines within 7 days if a single vent or drain valve in the line is determined to be inoperable. The TS for most BWRs do not currently include the option of isolating a vent or drain line but instead require restoring a single inoperable S.V. vent or drain valve to operable status within 7 days. Requirements are maintained to isolate a line within 8 hours if both vent or drain valves in a line are inoperable. This notice also includes a model no significant hazards consideration (NSHC) determination relating to this matter. The purpose of these models is to permit the