05000289/LER-1978-018-01, /01T-0:on 780519,two Restraints Found Not Installed on Emergency Feedpump Turbine Main Steam Supply Line Relief Valves MC-V22A/B Per Drawing.Caused by Improper Const.Nonessential Access Restricted to Relief Valve Area

/01T-0:on 780519,two Restraints Found Not Installed on Emergency Feedpump Turbine Main Steam Supply Line Relief Valves MC-V22A/B Per Drawing.Caused by Improper Const.Nonessential Access Restricted to Relief Valve Area

ML19261F197
Person / Time
Site:	Crane
Issue date:	06/02/1978
From:	Mitchell D METROPOLITAN EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19261F192	List: 05000289/LER-1978-018, Forwards LER 78-018/01T-0 05000289/LER-1978-018-01, /01T-0:on 780519,two Restraints Found Not Installed on Emergency Feedpump Turbine Main Steam Supply Line Relief Valves MC-V22A/B Per Drawing.Caused by Improper Const.Nonessential Access Restricted to Relief Valve Area
References
LER-78-018-01T, LER-78-18-1T, NUDOCS 7910250616
Download: ML19261F197 (2)

LER-1978-018, /01T-0:on 780519,two Restraints Found Not Installed on Emergency Feedpump Turbine Main Steam Supply Line Relief Valves MC-V22A/B Per Drawing.Caused by Improper Const.Nonessential Access Restricted to Relief Valve Area

Event date:
Report date:
2891978018R01 - NRC Website

text

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NRC FORM 366

. F NUCLEAR REGULATORY COMMISSION g

87 77)

LICENSEE EVENT REPORT CbNTRCL SLOCK: l l

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l l lh (PLEASE PRINT CR TYPE ALL REQUIRED INFORMATION) 1 6

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7 8 9 LICENSEE CCCE 14 15 LICENSE NUV8ER 25 26 LICENSE TYPE J0 67 CAT $8 CCN'T 5C7RCs l Il@l 0 ! 5 l 0 l 0 l 0 l 2 ] 819 l@l 015 l 1 l 917 l 8 l@)0 i6 l0 12 l 718 l@

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7 8

60 61 DOCKET NUM8ER 68 69 EVENT 0 ATE 74 75 REPORT O

'E 30 EVENT OESCRIPTION AND PROBABLE CONSECUENCES h o 2 i During normal operation while inspecting the relief valve piping, A/E's field l

engineers discovered 2 restraints were not installed en emergency feedpt=p turbine 1

o 3

o, l nain steam supply line relief valves (MS-V22A/3) as specified en piping drawine.

I Ccnsequently a potentially unsafe ccndition could exist if MS-V22A/3 vere required g

g to actuate due to a transient er failure. Failure of elief discharge flexible 1

o e I connection could result. The potentially unsafe condition veuld cecur in the event j o

7 l

cf a fire requiring evacuatien of the centrol recs concurrent with the discharge (cent.'1 o

g 30 7

8 9 SYSTEV CAUS

CAUSE

COMP.

VA LV E CCOE CCCE SUSCCCE COMPONENT CODE SUSCCCE SUSCCOE I - I = @ L1]@ Ld @ l e l "I o f ol = l el@ L2.J @ L:J @

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9 to 11 12 13 18 19 20 SEQU ENTI AL OCCUR R E NCE REPCRT REVISICN LER AO EVENT YEAR REFORT NO.

CCOE TYPE NO.

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_ 21 22 23 24 26 27 28 29 30 31 32 ACTICN FUTURE EFFECT SHUTDOWN ATTACHMENT NPRO-4 PRIME CCMP.

COMPCNENT TAKEN ACTION CNPt. ANT METHCO HOURS 4

$USMITTED FORM bu8.

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N 23 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTICN AND COARECTIVE ACTIONS i

o l Relief discharre restraints vere - et i st a ed A-i r acrst--'etica te

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_j Wl Inmediate corrective action censisted of -est-i-t4-r ~~~anea *'a' e a a a"

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2 I valve area and initiatine enrineerine.desiCn of trerer restraints to be instned es I i

3 l scen as pessible. Each crerating shi has been ahised of *he enerrency acticn I

] necessary to isolate such a failu-e.

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7 3 3 80 F 4C:LITY 9

METHCOCF STATUS

% POWER OTHER STATUS OISCOVERY DISCOVERY CESCRiPTICN 32 1@ 10 19 10 l@l NA I

I a l@l Nctificatice fre= A/r 1

i s

7 8 9 10 12 11 44 45 46 80 ACTIVITY CCNTENT RELEASEO CFRELEASE AMOUNT CF ACTIVITY LOCATION CF RELEASE l2lh NA l

NA l

1 6

7 8 9 to 11 44 45 go PERSONNEL EJtPOSURES NUM8ER TYPE OESCRIPT!ON 4 l0l0l0l@lZl@l NA l

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3 9 11 12 13 go Pf RSCNNE L INJURI ES NUMBER DESCRIPTCN i la l0l010l@l NA l

7 6 3 11 12 go LcS3 CF CR DAMAGE TO FACILITY TYPE CESCRIPTICN I

9 go 7

8 9 10 iSSUEf@oESCRiPTiON@

NRC USE CNLY lY

'Jeekly News Release l

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NAME OF PREPARER eE

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PNCNE:

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<m.m,- a.m_ e w I' vent Descri : tics sed 3-cbable Ccesecuences (ccet 'd) line fail = e

~'he at=capheric relief valves (MS-WA/3), which are also located is the emergency feedrump turbine rec =, =ust be -=~ ed by cperators Oc =c: trol

" sit cooldev: as a result of the pcstulated centrol rec = fire.

S.is event is considered to be a cceditic: =ct specificay ec sidered in the safety analysis rescrt er Technical Specificaticus tich requires re=edial actie:

to prevent the develop =est c: an unsafe Octditic: and is ccesider-d repe:-table is accords =ce with Technical Specification 6.9.2.A; 9 Secause of the lov prcbability of the s'-tanecus cecur ences ' = ** *e resulting d-

- '*ef in evacuatics of the ecstrol rec = and trs sients er failres resulting valve (MS '722A/3) actuatics, the pctentia' hazard to public hec.ith er safety is cet significant. Redundant =cter-driven emergency feedpu=ps are available if it vere necessary to isclate the emerge cy feed pu=p turbi:e steam supply dring scr~a' cperatic due to relief di3cha ga -* #ailure.

pc 3 'd'ar event 3 are :Cted.

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