ML19319D839

RO-77-16:on 771101,fluid Accumulator for Reactor Coolant Pump Protective Snubber Found Dry During Surveillance Insp. Caused by Leaking O-ring.Unit Rebuilt & Returned to Svc. O-ring Being Checked for Proper Matl

ML19319D839
Person / Time
Site:	Rancho Seco
Issue date:	11/29/1977
From:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:
Shared Package
ML19319D814	List: 05000312/LER-1977-016-03, /03X-1:on 780105,fluid Leakage Discovered on 781129 Traced to Failing Polyurethene O-ring.All Bergen- Patterson Snubber Polyurethane Seals Were Replaced w/ethylene-propylene Seals.Apparently One Seal Was Missed ML19319D813 ML19319D829 ML19319D839
References
NUDOCS 8003250827
Download: ML19319D839 (1)

Text

_

'UCENSEE EVENT REPORT g

CCNTROL BLOCK:l l

l l l

l l

(M.aAss Petus? ALL REOUIRED INFORGAATION)

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v,i'

'7v',"E uCENSE ~uM R

T O1 l Cl A lR l S l S l 1l l 0l0 l_.l0 l 0 l 0 l 0 l 0l_l0 l0 l l4l1l1l1l1l l 0l 1l 7 89 14 15 25 28 30 31 32 CATEGORY rvPE 00CKET NUMBER EVENT CATE REPORT CATE O 1 CONT lM l Il lLl W l 0l 5l 0l-l 0 l 3 l 1l 2l l 1l 1l 0l 1l 7 l 7 l l 1l 1l2 l9 l7 l7 l 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRPTION

@ l During a normal surveillance inspection, the fluid accumulator for one of six snubbers l 7 89 80.

@ l protecting a reactor coolant pump was found dry. The other 5 snubbers were l E!

7 89 60 3E l acceptable.

(RO-77-16) l 7 39 80 -

E I l

7 89 80 l

7 89 80 pswE

$CsE ea COMPONENT CCCE vcLAfr:4 0

lkl Xl W lH l A l Nl Gl ElR l W

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7 89 10 11 12 17 43 44 47 48 CAUSE DESCRPTION r

l A leaking 0-ring caused the empty accumulator. The unit was rebuilt and returned to l

7 89 80 0

l service. The 0-ring is being checked to assure it was of the proper material.

l'~

7 89 80 l

l 80 saCaJrv utisco e, STaruS

%PCWER OTHER STATUS QGCOVERY CSCOVERY DESCRIPTON LaJ 101 ol of I s^

i laJ l

NA l

1 7 8 9

10 12 13 44 45 46 80 aCTMTV CONTENT RELEASED OF AELEASE AMOUNT OF aCTMTV LOCATCN OF mELEASE tz_j LzJ l

NA l

l NA i'

l 12 7 8 9

10 11 44 45 80 -

PERSONNEL EXPOSURES NUMBER TvPE CESCRIPTON EE I of 01 4 WI NA l

7 89 11 12 13 80 PERSONNEL iNJUAIES NUMBER CESCRWTON EE l 01 0l d l

NA l

7 89 11 12 80 0FFSITE CONSECUENCES 15 l Minimal to none l

7 89 80 LDSS CR DAMAGE TO FACfUTY ryPE cESCRetcN Q]

l NA l

~.

7 89 10 80 PUBUCtTY in l Local newspapers and wire services notified November 18, 1977.

l 7 89 80 ADDITIONAL FACTORS 1

9 e0 8I l

d0 R. W. Colombo /F. T. Eisenhuth (916) 452-3211 NAME:

PHONE:

9 8003250

.