05000271/FIN-2013008-01
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Improper Maintenance Rule Scoping of the Reactor Building HVAC System |
| Description | The inspectors identified a NCV of Title 10 Code of Federal Regulations (10 CFR) 50.65(b)(2) because Entergy did not properly scope the reactor building heating, ventilation and air conditioning (HVAC) system within the stations maintenance rule program. Specifically, the inspectors determined Entergy did not properly scope the reactor building HVAC system, specific to the systems function to run and assist in area temperature control, into the maintenance rule program as required. The system is directly used in the emergency operating procedure (EOP)-4, Secondary Containment Control, to assist in mitigating a high temperature condition. The inspectors determined that this finding was more than minor because it is associated with the equipment performance attribute of the Mitigating Systems cornerstone and affected the cornerstone objective of ensuring the reliability of systems that respond to initiating events to prevent undesirable consequences. Specifically, reliably starting reactor building HVAC system could mitigate or lessen the severity of a high temperature condition in the reactor building during an event or system which requires EOP-4 entry. The performance deficiency was also determined to be similar to more than minor example 7.d per IMC 0612, Appendix E, Examples of Minor Issues. The inspectors completed a Phase 1 screening of the finding per IMC 0609, Attachment 4, Phase 1 Initial Screening and Characterization of Findings, and determined the finding to be of very low safety significance (Green) because the performance deficiency was not a design or qualification deficiency, did not involve an actual loss of safety function, did not represent actual loss of a safety function of a single train for greater than its technical specification allowed outage time, and did not screen as potentially risk-significant due to a seismic, flooding, or severe weather initiating event. The inspectors did not identify a cross-cutting aspect associated with the finding because the underlying performance aspects occurred in the late 1990s and no recent operating experience was identified that would reasonably have prompted Entergy to review their scoping adequacy. |
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
|---|---|
| Report | IR 05000271/2013008 Section 4OA2 |
| Date counted | Jun 30, 2013 (2013Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | F Bower S Rich A Dugandzic B Bollinger |
| Violation of: | 10 CFR 50.65(b) Technical Specification - Procedures 10 CFR 50.65 Technical Specification |
| INPO aspect | |
| ' | |
Finding - Vermont Yankee - IR 05000271/2013008 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Vermont Yankee) @ 2013Q2
Self-Identified List (Vermont Yankee)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||