05000498/FIN-2011004-04
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Technical Specification 3.0.4 requires, in part, that when a limiting condition for operation is not met, entry into a mode shall only be made when the associated actions permit continued operation in the mode for an unlimited period of time, or after performance of a risk assessment and establishment of risk management actions. In addition, Technical Specification 3.4.6.2 requires, in part, that while the plant is operating in Modes 1 through 4, unidentified reactor coolant system leakage shall be limited to 1.0 gallons per minute, and identified leakage shall be limited to 10.0 gallons per minute, or reduce to within limits within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, or be in Mode 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and Mode 5 within the next 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. Contrary to the above, the licensee failed to meet the requirements of Technical Specification 3.0.4, because Unit 2 entered Mode 4 on November 8, 2010, and Mode 3 on November 9, 2010, with unidentified leakage at approximately 2.0 gallons per minute, without reducing the leakage to within limits or transitioning to Mode 5 within the required timeframe; nor did they perform the required risk assessment or implement any risk management actions prior to making the mode changes. This violation was processed through significance determination process using Manual Chapter 0609, Appendix A, because the licensee had secured from using residual heat removal system in Mode 3. The finding was determined to be of very low safety significance because, assuming the worst case degradation, the finding would not have resulted in exceeding the 10 gallons per minute technical specification limit for reactor coolant system for identified leakage. The licensee entered this issue into their corrective action program as Condition Report 10-24488. |
| Site: | South Texas  |
|---|---|
| Report | IR 05000498/2011004 Section 4OA7 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | J Dixon G Guerra B Tharakan W Walker M Young D Proulx M Chambers S Makor S Hedger J Watkins J Dykert |
| INPO aspect | |
| ' | |
Finding - South Texas - IR 05000498/2011004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (South Texas) @ 2011Q3
Self-Identified List (South Texas)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||