05000498/FIN-2010005-04
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Technical Specification 3.3.2 requires, in part, that the engineered safety features actuation system instrumentation channels and interlocks shown in Table 3.3-3 shall be operable. Action c of Technical Specification 3.3.2 states that with an engineered safety features actuation system instrumentation channel or interlock inoperable, take the action shown in Table 3.3-3. Action 18(a) of Table 3.3-3 requires, in part, that with less than the minimum channels operable requirement for automatic actuation logic or actuation relays, operation may continue provided the containment purge supply and exhaust valves are maintained closed. Contrary to the above requirements, on May 22, 2010, the South Texas Project Unit 2 continued operation without maintaining the containment purge valves closed while one channel of engineered safety features actuation system was inoperable. This violation was processed through Phase 1 - Initial Screening and Characterization of Findings, of Manual Chapter 0609, Attachment 0609.04, dated January 10, 2008, because the reactor was at power. The finding screened to a Phase 2 evaluation because the finding was associated with the containment purge system of a pressurized water reactor with a large dry containment. Using Manual Chapter 0609, Appendix H, dated May 6, 2004, the finding was determined to be of very low safety significance because the amount of air purged during the entire evolution was less than 100 percent of the volume of the containment building. The licensee submitted event report LER 05000499/2010-003-00 (See Section 4OA3) and entered this issue into their corrective action program as Condition Report 10-11730. The licensees corrective actions included providing additional training to the operators and updating the conduct of operations and containment purge procedures. |
| Site: | South Texas  |
|---|---|
| Report | IR 05000498/2010005 Section 4OA7 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | B Tharakan W Walker A Fairbanks J Kramer S Hedger C Denissen L Micewski J Dixon G Guerra P Elkmann |
| INPO aspect | |
| ' | |
Finding - South Texas - IR 05000498/2010005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (South Texas) @ 2010Q4
Self-Identified List (South Texas)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||