ML20126E787

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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e LICENSEE EVENT REPORT CONT ROL BLOCK I ll l l l l

' LIC E NS E EVENT LIC E NS E E TYPE TYPE NAME LICENSE NUMBER

• 10101-10101 010101-1010] l hllli 1111130 10111 ElCI9 A l HIM lB l it14 15 25 26 31 32 REPORT MEPORT REPORT DATE ,

CATEGORY TYPE SOURCE DOCKET NUMBER E VENT D ATE

• ECONTIP101 LTJ LL_J 10151 01-101113131 10131117 17161 1013121917101 60 61 68 69 74 75 80 7 8 57 58 59 E VENT DESCR6PflON O I On Feb.16, during normal operation, the rate of water accumulation 801 7 89 0 i in the drywell sump began to increase from a normal of 0.2 gph. The l

((ratereached11.8gphonMarch 17, 1976 when the Unit vss shut down *80 -

[f to investigate. Leak was found in clean-up line between vessel and i' first-off isolation valve. (f46 hNo, 7/o-O/)

VIOL ATION '

CODE CO E [Ilj O Ieili trJ l hOMPONE NT CODE 111P P$ IE 1Zl 19 6 R IX MANiACTJRER IXj 44 47 43 7 89 10 11 12 17 43 CAUSE DESCRIPTION )

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

g GE I Sch 80. 80 y, 7 89 f ACILIT Y METHOD OF OTHE R ST AT US DISCOV E RY OfSCOVERY DESCRIPTION ST ATUS 8 LEJ

% PiWE R I lOld15I NA l [B._j iRoutine leak detection non- l 7 8 e 10 12 13 44 45 46 itoring60

,g,g, ACTIVIT Y CONTE NT

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g ""LJ' 1 Dry # 1 I EU"'i 10 E' c^"r%~c' EEM'"'":

11 44 45 80 7 8 9 PE RSONNE L E XPOSURES '

Q[U@l'0l $' i "dA'lfo"exposuresattributabletorelease) 80 l

7 8b 11 17 13 PE RSONNEL INJURSES EE DESCRIPTION 80 7 8 9 11 12 PF400 ADLE CONSE QUENCES 1

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

@T@YPE t Cmn2_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 80 l

7 85 ADDitlON AL F ACTORS

@l 7 89 I!DT examination of re.aininn 2 inch clean-un line 80 1

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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