ML19320A168

RO 50-313/76-15:on 760707,cracked Weld Discovered in Valve CZ-65 Heat Affected Zone.Caused by Improper Welding During Installation.Weld Removed & Replaced w/3 Ft Schedule 10 Piping

ML19320A168
Person / Time
Site:	Arkansas Nuclear
Issue date:	08/03/1976
From:	Mardis D ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19320A166	List: ML19320A165 ML19320A168 ML19320A169 ML19320A175
References
NUDOCS 8004210470
Download: ML19320A168 (4)

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1. Reportabic occurrence Report No.'50-313/76-15

2. Report Date: 8/3/76 3. Occurrence Date_: 7/7/76

4. Facility: Arkansas Nuclear One-Unit 1

Russellville, Arkansas

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S. Identification of Occurrence:

A cracked weld in the Resin Sluice line.

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Conditions Prior to Occurrence:

Steady-State Power X Reactor Power 2414 MWth llot Standby Not Output 778 MWe i

Cold Shutdown Percent of Full Power 94 'a e

Refueling Shutdown Load Changes During Routinc Power Operation i Routine Startup -

i. Operation

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Routine Shutdown Operation

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i Other (s'pecify)

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7. Description of Occurrence: .

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A leak was discovered at 0830 hrs. on 7/7/76 in the heat effected

one of valve CZ-65 (Resin Sluice Water to Spent- Resin Storage Tank) . .

The crack was approximately two inches long around the upstream weld j of CZ-65. ,

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Attachuent "C"

'  !! arch 23,1976 NSP-10, Rev. 4 - Page 2 of 4 8004210fpO

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- Reportablu Occurrence !!cport No. 50-313/76-15 6

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8. Designation of Apparent Cause ol]k currence:

g Design l'rocedure

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Flanufacture Unusunt' Service Condition

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Including Environmental Installation / 'X Construction Component Failure

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Other (specify) i i .

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- 1 V 9. Analysis of Occurrenec:

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Due to location, all leakage was confined to the Reactor Auxiliary building and therefore presents no danger to the health and safety of the public. -

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.\ttachment "C" bbrch 23, l'J76 NSI'- 10, Itev. 1 l'a ge 3of4 i:

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Reportable Occurrence Report ilo. 50-313/76-15 1

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10. Corrective Action: 1

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The defective weld was removed by cutting out the piping and replacing

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with a 3'-0" section of Schedule.10 piping. '

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11. Failurc Data

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At tachinent "C" j March 23, 1976 NSP-10,.Hov. 4 Page . of .

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UCENSEE EVENT REPORT

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CONTTEL BLOCK:l l 'l l l l l [ptaAss pettNT ALL REGuillED INFOftMATION)

( 1 e U) T uCENsE NuM,,ER "J#' W,"E

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O 14lEl#1Rlel/I lolol-lololcicicl-lclol lel/I/I/I/l Icls!32 '

7 89 14 15 25 28 30 31 CATEGORY YPE SC DOCKET NUMBER EVENT DATE REPORT CATE O CONT l l l (g_) {L] l6l 5l Ol-l Cl3 l / l3 l lCl7lCl7l7l6l lCl ?lC l 3l 7l6 l 7 8 57 58 59 80 81 88 89 74 75 80 EVENT DESCRIPTION BB l%vn m e- m ,s- wwer own-rror (9+ 7s rP) H-r C83e wares e x 7~u 7.197d l l 7 89 - '

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BE l9 z.ew we 31sco veresa iv rm o e w re m vr e vsLve C2 -/ 5 (E=sni l 7 89 80 '

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l l 7 89 80 BE l na rucaes tem a rr~u e r r se upsrem r ez n nr c2 -t r 7 89 Yr- a w?rr 80 l

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BG l occurg_nace- 7 % - w ac m e e. sci.2 ,a renActs ( ro - 3/3 /74- is ) l 7 89 m 80 CooE DE COMPONENT CODE VIOLATION HE IMI di Lg] I FI / I rial xi xi 12] 12IaIaIal I.SJ 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION

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u=c n r e s - V maxnc-v --~ ,ar a=Az~u An3 sp r2'T"Y c' =~ --w~~ l 7 89 80

$$ I PrfML/c. YW ~DcrG"C ~ri Vf a CLD Wdf Remna re=3 pov3 TGP L.AC 2"D fu / #d A f 7 89 80 hl-r9Jtef~ /~C 0~7" rL=C~r~ red o f" c M&Datt.e~- le PIP /x6 . l (L, sACUTY METHOD OF STATUS  % POWER OTHER STATUS OtSCOVERY DISCOVERY DESCRipfl0N i

(_El Icl9lfl I m1 I LB_j l N4 I 7 8 9 10 12 13 - 44 45 48 80 RELEAS O O SE AMOUNT OF ACTMTV LOCATION OF RELEASE

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7 8 9 (2]. [2]

10 I se I l v4 1 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Igj L '

n leiclol v4 i 7 89 11 12 13 80 PERSONNEL INJURIES '

NuM8ER DESC3hPT10N h l [} '

O M Iol clo I I N4 th in n .  ;

I 7 89 11 12 ~ "

80

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OFFSITE CONSEQUENCES

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7 89 -

._. 80 LOSS OH DAMAGE TO FACruTY .

TYPE DESCRIPTION

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7 89 10 80 PUBLICITY 1

l l 7 89 80 ADDITIONAL FACTORS ClI

\,j 8 9

/v4 80 l

DE I l 7 89 80 NAME: 4 8' '--" 8 MNf5 pHCNE: [5F/) 37/' 4494 GPO 881 667

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