ML19320A072
| ML19320A072 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 11/01/1976 |
| From: | Cook R ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19320A067 | List: |
| References | |
| NUDOCS 8004140685 | |
| Download: ML19320A072 (4) | |
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!!E lbi. steadv state.oceah. at IM5. 10 3 % a leak was discovered at a l
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7 89 80 LOSS OR DAMAGE TO FAC:UTY fvpf OESCAWTCN Emi NA I-7 89 10 80 PUBUCITY I
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NSP-III-2. Rev. 5 kEacpp,y "o
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Reportable Occurrence Report No.
50-313/76-29 4
2.
Report Date: November 1, 1976 3.
Occurrence Date: October 3, 1976 4.
Facility:
Arkansas Nuclear One-Unit 1 Russellville, Arkansas 5.
Identification 6f Occurrence:
Leak in Primary Makeup Pump P36C suction relief line 4
6.
Conditions Prior to Occurrence:
3 Steady-State Power X
Reactor Power 2542 MWth Hot Standby Net Output 824 MWe Cold Shutdown Percent of Full Power 99 Refueling Shutdown Load Changes During Routine Power Operation Routine Startup..
Operation Routine Shutdown
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Operation Other (specify) s i
7.
Description of Occurrence:
~2 At 165S hrs. on 10.3/76, a leak was discovered at a socket weld, pipe to 900 elbow weld, in the primary makeup pump P36C suction relief line. P36C was removed from service and P36B was placed in service.
NSP-III-2, Rev. 5 Attachment "D" S
October 1, 1976 Page 2 of 4 l
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Reportable Occurrence Report No.
50-313/76-29 4
8.
Designation of Apparent Cause of Occurrence:
Design x
Procedure Manufacture Unusual Service Condition Including Environmental Installation /
Construction Component Failure.
(See Failure D tta) 5 Operator Other' (specify)
This failure could be contributed to the fact that the 3/4" relief line is rigidly supported witile the 6" suction line is subjected to vibration.
i 9.
Analysis of Occurrence:
Even though only one pump was operable during the time repairs were made, which is allowable by Tech. Spec., there was no ha:ard to the health and safety of the public.
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1 October 1, 1976 NSP-III-2, Rev. 5 Attachment "D" 5
Page 3 Of 4 ym
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7 Reportable Occurrence Report No.
50-313/76-29 A
4 1
- 10. Corrective Action:
The defective weld was repaired. An engineering evaluation is being made and if.necessary modifications will be made to prevent a reoccurrence.
4 4
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Failure' Data:
This same weld failure was also reported in ROR #'/6-12.
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October 1, 1976 NSP-III-2, Rev. 5 Attachment "D" 5
Page 4 of 4 4
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