ML20009F744
| ML20009F744 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 07/21/1981 |
| From: | Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML20009F730 | List: |
| References | |
| LER-81-019-01T, LER-81-19-1T, NUDOCS 8107310489 | |
| Download: ML20009F744 (2) | |
Text
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, i ,3, , requirements of T.S.-3.12.C.3 This is reportable per ' 3. 6.6.2a. (2) . The unit ]
, ,a,,;; remained in a controllable state throughout the event, and the rods were caeable of' f
!o#7: I being droceed if recuired. Ther= fore, the health and safety of the oublic were not I i: ,eii affected. t so
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i jii ; lunit was maintained cr'itical for more than the allowable two hour oeriod due to ?
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PDR ADOCK 05000280 ____.__.,___".,,r_
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SURRY POWER STATION, UNIT 1 DOCKET NO: 50-280 REPORT NO: 81-019/01T-0 EVENT DATE: 07-07-81 FAILURE TO SHUTDOWN WITH lNOPERABLE RODS ,
- 1. DESCRIPTISH OF EVENT:
With th<< unit critical at 0% power curing low power physics testing, an urgent f ailure alarm occurred, indicating that the control cods were inoperabic. This condition existed for more than two hours, but the unit was maintained critical. This is contrary to T.S.-3.12.C.3, and is reportable per T.S.-6.6.2a(2).
- 2. PROBABLE CONSEQUENCES:
The rods remained inoperable fer less than 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />. The unit remained in a controllable state throughout this period, and all control rods were capable of being dropped if required. Therefore, the health and safety of the public were not affected. -
3 CAUSE:
The control rods were Inoperable because of a blown fuse in a power cabinet.
The unit was maintained critical for greater than the two hour period al-lowed by the Technical Specifications due. to inadequate annunciator proce-dures.
- 4. IMMEDIATE CORRECTIVE ACTION:
The blown fuse was located and replaced, making the control rod system operable.
5 SUBSEQUENT CORRECTIVE ACTION:
None required.
- 6. ACTION TAKEN TO PREVENT RECURRENCE:
The annunciator procedure will be revised to provide further guidance to the operators concerning control rod operability requirements.
- 7. GENERIC IMPLICATIONS:
None.
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