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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,h. UCENSEE EVENT REPOR m CONTROL BLCCK:l l l l l l l [Pt. EASE PRINT ALL REOlJIMED INPomatATIO98)
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@E) I AIR , A IRIK I U 101o1-1o1010101o1-10101 14 I I I il I I I i lol31 32 7 89 14 15 25 26 30 3e CATEGORY Type s DOCKET NUM8EA EVENT DATE AEPORT CAff 0 CON'Tl l I W M 1015101-101311131 1110101317161 lll11o1117161 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTON
!!E lbi . steadv state .oceah . at IM5 . 10 3 % a leak was discovered at a
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0 15ecke{inald,e;,,(3 C)O' elbow u,e11. *,n we 'Pv; ..,' Mali. . P m p ?%c. eu.4;.. re) e c 1 7 89 ' ' ' '
80' 30 l IIwe . bb b t4sM olkced in sevve'te and the Ne ld on Oe Ph( Such reliN lIwe Wu 80
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7 89 8 HE Iveca,;rea. %it well failure was re ported previously t w RoR 50-Sit / M-12,.(*>o Bi31%-In l 7 89 80 I
@B L 80 7 89 m, Yes CCOE CCMpONENT CODE VAPM V10uTCN u Icl41 LB] lP lI l P lG lx ix i LAJ IZl919191 11]
7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION U lDe b'ilure veaw be cowtWhAfed to Oc & art Ekd khe Y4" FelieE line is NeidIv supo.rked ~
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80 HE lt.> Lite the 6" sutw. i ce is not ava is muede4 h vibrati.w . A. .w ;tecerroevousw.ars
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1 89 80 I b.i.. ce< t. ea 4. 4.t. . ;c w.oa:t; aw.. s,e ne ..s av, . I
'st % POWEA QTHER STATUS OSCOVERY OISCOVERY DESCASTCN
- EB LEJ 1o1919I I N A I Lbj i MA l 7 8 9 10 12 13 44 45 48 80 AYtrIsED o $ASE AMOUNT or ACTmTv toCarCN or REttast 3E LIJ lIJ l NA I I NA I
- 7 8 9 10 11 44 45 80 PERSONNEL EXPOSUAES ,
NuMsEn tvet otsConvCN g DE 1010101 LIJ lNA I 7 89 11 12 13 80 PERSONNEL INJUAIES NUM8ER DE lololol ICESCA*T'O1 N 1 7 89 11 12 80 0FFSITE CONSEQUENCES i l MA 80 i
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LOSS OR DAMAGE TO FAC:UTY fvpf OESCAWTCN Emi NA I-7 89 10 80 PUBUCITY I NA I 7 89 80 A00lTONAL FACTCAS I NA I 89 80 mg I a 0 0 4140 b bE i NAME; CCck N ONE(5 00 M l. 4 199 kEacpp,y "o "b u7 n,...w. i . t o-r s. . _ _ ._. NSP-III-2. Rev. 5
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- 1. Reportable Occurrence Report No. 50-313/76-29 4
- 2. Report Date: November 1, 1976 3. Occurrence Date: October 3, 1976
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- 5. Identification 6f Occurrence:
Leak in Primary Makeup Pump P36C suction relief line ,
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- 6. Conditions Prior to Occurrence:
3 Steady-State Power X Reactor Power 2542 MWth
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Hot Standby Net Output 824 MWe Cold Shutdown Percent of Full Power 99 %
Refueling Shutdown Load Changes During Routine Power Operation _.
Routine Startup..
Operation
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Routine Shutdown Operation Other (specify) s
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- 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. .
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NSP-III-2, Rev. 5
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Attachment "D" S _
October 1, 1976 Page 2 of 4
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Reportable Occurrence Report No. 50-313/76-29 4
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- 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
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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.
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- 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
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A Reportable Occurrence Report No. 50-313/76-29 4
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- 10. Corrective Action:
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The defective weld was repaired. An engineering evaluation is being
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reoccurrence. - '
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- 11. 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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