ML19319E183

RO-77-11:on 770921,reactor Bldg Purge Inlet & Outlet Penetration Leakage Found in Excess of Tech Specs Limits. Caused by Model 60WR Valve Seat Degradation & Adjustment. Inside Valve Seat Replaced & Outside Seat Adjusted

ML19319E183
Person / Time
Site:	Rancho Seco
Issue date:	10/18/1977
From:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:
Shared Package
ML19319E171	List: ML19319E170 ML19319E174 ML19319E177 ML19319E183
References
NUDOCS 8003310699
Download: ML19319E183 (1)

Text

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UCENSEE EVENT REPORT s

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l cm. mass,awr au. a ousso =Foamanom V) 1 8

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'7v'd" uCENSE NuMuR o

lC l Al Rl Sl Sl 1l l0lQl-l0l0l0l0l0l-l0l l

l 4l 1l1l 1l 1l l0l1l 7 89 14 15 25 26 30 31 32 CATEGORY TYPE HC DOCKET NUMBER EVENT CATE REPORT OATE CCN'T l P l OL [L_j lLl l 0l 5l 0l-l 0l 3l1 l 2 l l 0 l 9 l 2l 1l 7l 7 l l1l 0l 1l 2l 7l 7l

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O 7 8 57 58 59 60 61 68 69 74 75 80 l

EVENT DESCRIPTION gg l During LLRT, leakage from the RB Purge Inlet Penetration was measured at 9.040 cubic l 7 89 go 4

g l feet per minute, and from the Purge Outlet penetration at 64.625 cubic feet per l

4 8

ggfminute. The total leakage allowable from all penetrations tested under LLRT is HE y 3.743 cubic feet per minute. A similar leakage from the purge outlet was reported 8]

~

7 89 gg in August, 1975.

(RO-77-ll) 8j 7 89 80 -:

pseuf COE CCMPQNENT CCCE YOLATION UE l Al Al lE l lV l A lL l Vl El Xl lA l l A l1l8 l0l lNl

///

7 89 10 11 12 17 43 44 47 48 D

CAUSE DESCAiPTION DE I oegradation and adjustment of valve seats caused the leakage. Both valve seats l

7 89

'80 -

Q l inside the Reactor Building were replaced, outside valve seats were adjusted.

l 8

e New leak rates totaled 0.190 cubic feet per minute for both penetrations. ILRT 89 gegormedOctober2-6successfully.

' SO STATUS 4 POWER QTHER STATUS CSCOVERY CECCVERY QESCRtpflCN l0l0l0l l NA l

l NA l

1 7 8 9

10 12 13 44 45 48 80 ACTMTV CONTENT AELEASED OF AELEASE l AMOUNT CF ACTMTY LCCATION OF AELEASE i

W NA l

l NA

=,

l E

l Zl 7 8 9

10 11 44 45 ao.

PERSONNEL EXPOSURES NUM9ER TYPE CESCRWTION DE I 010101 LZJ l

NA l

7 89 11 12 13 80 PERSONNEL INJUA!ES NUM8ER CE5CRIPTION M l 0i 0l 0l l

NA l

7 89 11 12 80 0FFSTTE CONSECUENCES gg l Minimal to none l

7 89 80

[

LOSS CA DAMAGE TO FAC!UTY

-TYPE CESCRIPTION

@Wl NA l

7 89 10 go PUBLICITY DE l Local newspapers and wire services notified.

l 7 89 80 ADDITIONAL FACTORS 9el The valves are 66-inch butterfly, Model 60WR, manufactured by Allis Chalmers.

l 69 80 b!

l 7 89 80 R. W. Colombo /F. T. Eisenhuth NAME:

PHCNE:

geoss 1 o d17"'

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