ML19326B853
| ML19326B853 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 09/27/1976 |
| From: | David Williams ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19326B844 | List: |
| References | |
| NUDOCS 8004180590 | |
| Download: ML19326B853 (4) | |
Text
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1- Reportabic Occurrence Report No. 50-313/76-25
- 2. Report Date: 9/27/76 3. Occurrence Date: 8/31/76 4 Facility: Arkansa? Nuclear One-Unit 1 Rursellv11.a, Arkansas
- 5. Identification of Occurrence: . I Leak in "B" decay heat discharge line.
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- 6. Conditions Prior to Occurrence:
Steady-State Power Reactor Power 0 MWth llot Standby Not Output 0 MWe i
Cold Shutdown X Percent of Full Power 0 *5 i
Refueling Shutdown Load Changes During Routine Power Operation i Routine Startup '
- i. Operation
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Routine Shutdown
} Operation
] - Other (specify)
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- 7. Description of Occurrence: .
At 0420 hours0.00486 days <br />0.117 hours <br />6.944444e-4 weeks <br />1.5981e-4 months <br /> on 8/31/76, an approximate 2 gpm leak was discovered in the heat affected zone of the boss to line weld for DH-1019.
The crack was in the 10" discharge line downstream of decay heat.
]l cooler E3SB.
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Attachuent "C" l !! arch 23,1976 NSP-10, Rev. 4 Page 2 of 4 1
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s Reportable Occurrence Report No. 50-313/76-25
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- 8. Designation of Apparent Cause ol' Occurrence:
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Design Procedurc Manufacture Unusual Service Condition including Environmental Installation /
Construction Component Failure -
Operator Other (specify) X <
The probable cause of the crack was excessive vibration.
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s 9. Analysis of Occurrence:
The leak was confined to the Reactor Auxiliary Building; hence, there wa._no hazard to the health and safety of the public.
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Attachment "C" March 23, 1976 NSP-10, Rev. 4 Page 3Of4 l
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Reportable Occurrence Report iio. 50-313/70-25 -
- 10. Corrective Action:
The repair was made by removing r. 2 ft. section of the schedule 10.p.iping and replacing with new section.
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- 11. Failure Data:
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Cracked welds reported in Reportable Occurrence Report 50-313/74-2, 76-10, and 76-24. Section of pipe had same heat number of 800201.
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! l Attachment "C" March 23,1976 NSP-10, Rev. 4 Page 4 of 4
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UCENSEE EVENT REPORT
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. CONmat 8tOCx:1 1 I I I l l casase paar au amoumao =PoemaTem !
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"*""l' uCENSE NUM8ER ' Tv'"J' ?v'n*' !
(]t u7 89l A l/ll Al AI MI10101-1010101 14 15 ll ol ol-l ol o l I vl / II l/ I tl 25 28 30 lol31 31 32 1
CATEGORY TPE 00CxtT NUMBER EVENT CATE REPORT CATE 01 con T l l I W I I. I lo l sl ol-l ol 71 i l2 I I ci f l 11/ l 71 tl I ol4121717l(I 7 8 57 58 59 SO 81 68 89 74 75 80 EVENT OFSCRIPTION O l 0 % v lsu (olN s $ a d a us u , a - l P er l< war Ifeouev N Eu 4= l. a I ,
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CouPcNENT CooE E O vmATcN f E Icifl [FJ 7 89 10 11 Lp-l M al M a l a i 12 17 LA' 43 44 IPl414I91 47 lul 48 f 4
CAUSE DESCRPTION !
@l 7 89 f% t. . U. e..c. u, a s e n e.cr;ve v A . .,:o w Two J. s 80 I
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P:s :-./ t, o d I 7 89 80 oC enn 1a r (m ! L ea - . t. . - I ST 4 POWER OTHER STATUS O COVERY CSCOVERY OESCRIPTICN 11 [GJ l olo lo i I NA I LkJ l A/4 I 7 8 9 10 12 13 44 45 46 80 A 0 0 AMOUNT OF ACTMTY LCCATION OF RELEASE I 12 7 8 9 W L2] LEASE l 10 11 NA l 44 l
45 NA 80 l
PERSONNEL EXPOSURES NUM8ER TvPE DESCRtPTION 13 Iof clo I l el I #A I l 7 89 11 12 13 80 '
PERSONNEL INJURIES NUMBER CdSCRIPTION 14 1010101 I NA I 7 89 11 12 80 OFFSITE CONSEQUENCES ui NA I I
! 7 89 80
( LOSS OR DAMAGE TO FAC:LITY
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TYPE CESCRIPTION I I I ,
7 89 10 80 PUBUCITY 17 I Md i 7 89 80 ADDITIONAL FACTCRS l ((N)I #A I l W89 , 80 l 19 I I
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