ML20126E787

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RO 76-01:on 760317,during Operation,Water Accumulation Rate in Drywell Sump Began to Increase from Normal of 0.2 Gph. Caused by Leak Found in Cleanup Line Between Vessel & first-off Isolation Valve.Cleanup Line Replaced
ML20126E787
Person / Time
Site: Humboldt Bay
Issue date: 03/29/1976
From: Rapp W
PACIFIC GAS & ELECTRIC CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
RO-76-01, RO-76-1, NUDOCS 8103020289
Download: ML20126E787 (1)


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LICENSEE EVENT REPORT CONT ROL BLOCK I ll l l l l LIC E NS E EVENT LIC E NS E E NAME LICENSE NUMBER TYPE TYPE ElCI A l HIM lB l it 10101-10101 010101-1010] l hllli 11111 10111 25 26 30 31 32 9

14 15 REPORT MEPORT CATEGORY TYPE SOURCE DOCKET NUMBER E VENT D ATE

  • REPORT DATE,

ECONTIP101 LTJ LL_J 10151 01-101113131 10131117 17161 1013121917101 7 8 57 58 59 60 61 68 69 74 75 80 E VENT DESCR6PflON I On Feb.16, during normal operation, the rate of water accumulation 1

O 80 7 89 in the drywell sump began to increase from a normal of 0.2 gph. The l 0

i

((ratereached11.8gphonMarch 17, 1976 when the Unit vss shut down

  • 80

[f to investigate. Leak was found in clean-up line between vessel and

' first-off isolation valve.

(f46 hNo, 7/o-O/)

i VIOL ATION MANiACTJRER

[Ilj l hOMPONE NT CODE 111P IE IX I X j P$ R CODE CO E 1Zl 19 6 O

Ieili trJ 7 89 10 11 12 17 43 44 47 43 CAUSE DESCRIPTION

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[i@l IIA-Sect 3-of clean-up line was replaced in kind. During repair, onel yisectic Sch 40 pipe was discovered and replaced with required 8j 30 7 89 GE I Sch 80.

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80 7 89 y,

METHOD OF f ACILIT Y OTHE R ST AT US DISCOV E RY OfSCOVERY DESCRIPTION ST ATUS

% PiWE R lOld15I I NA l

[B._j iRoutine leak detection non-l 8

LEJ 7 8 e

10 12 13 44 45 46 itoring60

,g,g, ACTIVIT Y CONTE NT g ""LJ' EU"'i E' c^"r%~c' EEM'"'":

1 Dry # 1

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7 8 9

10 11 44 45 80 PE RSONNE L E XPOSURES Q[U@l'0l $' i "dA'lfo"exposuresattributabletorelease) l 80 7 8b 11 17 13 PE RSONNEL INJURSES EE DESCRIPTION 80 7 8 9 11 12 PF400 ADLE CONSE QUENCES HI li A 1

80 7 89 t OSS OR D AM AGE TO F ACILITY Ot SC RIP TION

@T@YPE tCmn2_1 circumferential crack in 2 inch line. Less of power cen. I 80 7 89 10 F i m i. ICIT Y

@L Ucvs release to local inedia l

80 7 85 ADDitlON AL F ACTORS

@l I!DT examination of re.aininn 2 inch clean-un line 1

80 7 89 gl showed proper thickness (all clean-up suction pipe is now Sci) 80) l 80 j

7 89 Walker T. Rapp 707 hb3-2787 PHONE.

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