ML19320A089
| ML19320A089 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 11/17/1976 |
| From: | Cook R ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19320A083 | List: |
| References | |
| NUDOCS 8004140698 | |
| Download: ML19320A089 (4) | |
Text
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Page 1 of 3 O
o 1.
Reportable Occurrence Report No. 50 313/76-32 4
2.
Report Date: Nove.eber 17, 1976 3.
Occurrence Date: October 21, 1976 s
4 Facility:
Arkansas Nuclear One - Unit 1 Russellville, Arkansas i
5.
Identification of Occurrence: Inoperable valve in Reactor J
Building Chilled Water System.
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6.
Conditions Prior to Occurrence:
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Steady-State Power X
Reactor Power 2542 MWth Hot Standby Net Output 824 MWe f
Cold Shutdown Percent of Full Power 99 %
O Refueling Shutdown load Changes During Routine D
Power Operation Routine Startup Operation Routine Shutdown Operation Other (specify)
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Description of Occurrence:
On October 21, 1976, at 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> a preventative maintenance check was made by cycling valve, CV-6202, Reactor Building Chilled Water Inlet Isolation Valve. The valve would shut then reopen after approximately 35 seconds.
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NSP-III-2, Rev. 5 Attachment "D" 5
October 1, 1976 Page 2 o# 4
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s Page 2 cf 3 Reportable Occurrence Report No.
50-313/76-32 s
8.
Designation of Apparent Cause of Occurrence:
Design Procedure s
Manufacture Unusual Service Condition I
Including Environmental Installation /
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Construction Component Failure.
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(See Failure Data) 5 Operator Other (specify) -
i Foreign material found in the solenoid valve which prevented c
positive actuation.
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Analysis of Occurrence:
t Even though the isolation valve was proven inoperable, the check valve (tested April 30, 1976) would prevent any back flow, hence there was no hazard to the health and safety of the 5
public.
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'L October 1, 1976 NSP-III-2, Rev. 5 Attachment "D" 5
Page 3 Of 4 i
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Page 3 of 3 t
Reportable Occurrence Report No. 50-313/76-32 4
- 10. Corrective Action:
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i lhe solenoid and supply lines were cleaned and the valve tested.
)
The test proved the valve operated properly and was returned to service r.c 2340 hours0.0271 days <br />0.65 hours <br />0.00387 weeks <br />8.9037e-4 months <br /> on October 21, 1976.
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Failure Data:
L Solenoid Actuator Data:
ASCO three position solenoid valve P
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October 1, 1976 NSP-III-2, Rev. 5 Attachment "D" 5
Page 4 of 4
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