05000275/FIN-2009002-04
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Technical Specification 5.4.1.a, Procedures, required that PG&E implement written procedures recommended in Regulatory Guide 1.33, Revision 2, Appendix A, February 1978. Regulatory Guide 1.33 includes procedures for draining the reactor coolant system. Contrary to this, on March 13, 2009, PG&E failed to properly align the mid-loop level monitoring system in accordance with Procedure MP I-2.28, Activation of the Reactor Vessel Refueling Level Indication System, prior to start of reactor drain down for mid-loop operations. During the reactor coolant system drain down, a maintenance technician identified that the narrow range level transmitter isolation valve was closed when required to be opened. PG&E stopped the drain down operations and performed a system walk down. During the walk down, PG&E also identified that the flex hose used for the wide range level instrument vent was not connected as required. A maintenance technician and independent verifier had signed off both procedure steps as completed. The inspectors concluded that less than adequate pre-job brief, failure to maintain the procedures in-hand, inadequate use at place keeping and peer checking during the system alignment contributed to this violation. PG&E entered this issue into the corrective action program as Notification 50212379. This finding is of very low safety significance because PG&E did not lose all reactor vessel level indications during midloop operations. |
| Site: | Diablo Canyon  |
|---|---|
| Report | IR 05000275/2009002 Section 4OA7 |
| Date counted | Mar 31, 2009 (2009Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | M Brown M Peck B Henderson D Stearns G George V Gaddy C Alldredge M Vasquez |
| INPO aspect | |
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Finding - Diablo Canyon - IR 05000275/2009002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Diablo Canyon) @ 2009Q1
Self-Identified List (Diablo Canyon)
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