ML19309D845
| ML19309D845 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 09/08/1977 |
| From: | Mardis D ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19309D843 | List: |
| References | |
| NUDOCS 8004110704 | |
| Download: ML19309D845 (4) | |
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Reportable Occurrence Report No.
50-313/77-18 2.
Report Date: 9/8/77 3.
Occurrence Date:
8/26/77 4
Facility:
Arkansas Nuclear One - Unit 1 Russellville, AR 72801 5.
Identification of Occurrence:
The inoperability of the Hydrogen Purge System 6.
Conditions Prior to Occurrence:
Steady-State Power X
Reactor Power 2568 MWth Hot Standby Not Output 778 MWe Cold Shutdown Percent of Full Power 100 %
Refueling Shutdown Ioad Changes During Routine Power Operation Routine Startup Operation Routine Shutdown Operation Other (specify) 7.
Description of Occurrence:
At 1120 hours0.013 days <br />0.311 hours <br />0.00185 weeks <br />4.2616e-4 months <br /> on 8/26/77 while conducting surveillance testing on the Hydrogen Purge System, it was discovered that the proper flow rate could not be established. An investigation revealed that the problem was caused by the filters being full of water.
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m Reportable Occurrence Report No. 50-313/77-18 8.
Designation of Apparent Cause of Occurrence:
Design Procedure Manufacture.
Unusual Service Condition Including Environmental Installation /
Construction Component Failure.
(See F2ilure Data)
Operator X
Other (specify)
The probable cause was an incorrect sequence of valve operation when placing the system in service.
9.
Analysis of Occurrence:
Since the Hydrogen Purge System is not required until 11.5 days following a LOCA, there was no hazard to the health and safety of the public.
s Reportable Occurrence Report No.
50-313/77-18
- 10. Corrective Action:
The correct sequence of valve operation has been reemphasized to the
--Operations personnel. The filters have been replaced and a vendor representative has tested and certified the filters to be acceptable.
-- A Technical Specification revision changed the required action when both systems are inoperable from being in a cold shutdown condition a
within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> to allowing reactor operation for 30 days with an additional 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> to be in a hot shutdwon condition.
11.
Failure Data:
None 4
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