ML19308D479
| ML19308D479 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 08/08/1977 |
| From: | Stewart W FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML19308D473 | List: |
| References | |
| NUDOCS 8002280788 | |
| Download: ML19308D479 (2) | |
Text
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iau'e UCENSE NUMBEA T
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,)9 14 15 25 26 30 31 32 CAThCcAY "r7PE S[2 N E CCCKET NUMBER EVENT oATE AEPoAT OATE O 1 CONT l -l -l l Ll l Ll l0 l5 l0 l-l0 l3 l0 l2 l l 0l 7 l1l5 l7 l7 l l0 l 8l 0l 8l 7l 7 7 8 57 58 59 60 61 68 69 74 75 c
EVENT DESCRIPTION O2 l While performing the quarterly valve cycling procedure SP-370, containment isolation 7 89 i
g l valve SW-47 failed to close contrary to Tech-Spec 3.6.3.1.
Redundancy was maint'ained.
7 89 t
Q l with SW-25.
First time occurrence. Maintenance restored operability of SW-47.
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7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION 9
[OT81 l This event was caused by a loose control wire connection to the limit switch. The
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7 89 E. '
g l connection was tightened and SW-47 was restored operable.
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SEE ATTACHED SUPPLEMENTARY INFORMATION W.
P'. Stewart [,, \\
PHONE: 813/866-4159 M E.
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SUPPLEMENTARY.INFORMATION im Report No.:
50-302/77-88 2.
-Facility:
Crystal River Unit #3 3.
Report Date:
8 August 1977 4.
Occurrence Date:
15 July 1977 5.
Identification of Occurrence:
Containment isolation valve SW-47 inoperable contrary to Technical Specification 3.6.3.1.
6.
Conditions Prior to Occurrence:
Mode 1 power operation.
7.
Description of Occurrence:
At 0700, while performing the quarterly valve cycling surveillance procedure, SP-370, Nuclear Services Closed Cycle Cooling Valve SW-47 would not close from the Control s.
Room.
Redundant valve SW-25 was manually closed and valve SW-47 was taken out-of-service for maintenance. Maintenance was performed restoring SW-47 operable.
8.
Designation of Apparent Cause:
This event was caused by a loose wire on the limit switch.
9.
Analysis of Occurrence:
There were no safety implications due to this event, as redundant valve SW-25 was utilized for containment isolation.
10.
Corrective Action:
None required as normal maintensace restored operability of SW-47.
11.
Failure Data:
This was the first occurrence of SW-47 failure to operate.
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