ML20087P120

Final Part 21 Deficiency Rept SD 413-414/81-11 Re Failed Borg-Warner Corp Nuclear Valve Div Motor Operated Gate Valves.Initially Reported on 810602.Valves Returned to Vendor for Repair

ML20087P120
Person / Time
Site:	Catawba
Issue date:	03/27/1984
From:	Tucker H DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21-84-210-000 CA-81-018, CA-81-18, PT21-84-210, PT21-84-210-000, NUDOCS 8404060073
Download: ML20087P120 (4)

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Dunz POWER GOMPANY P.O. BOX 33180 CHARLOTTE, N.C. 28242 HALH. TUCKER Tuternown (704) 373-4531 vu.m r===roen 3

R 27,-1984

'Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region 11 101 Marietta' Street, NW, Suite 2900 Atlanta,- Georgia 30303 Re:

Catawba Nuclear Station Units 1 and 2 Docket Nos. 50-413 and 50-414

Dear Mr. O'Reilly:

Please find attached a final report describing corrective action taken in

-response to Significant Deficiency No. SD 413-414/81-11.

Very truly yours,

/

kgb/'

.Q' Hal B. Tucker.

LTP/php Attachment-cc:

Di recter INP0 Records Center Office _of Inspection &-Enforcement Suite 1500 U. S. Nuclear Regulatory Commission 1100 Circle 75 Parkway

-Washington, D. C. 20555 Atlanta, Georgia 30339 NRC Resident inspector Mr. Robert Guild, Esq.

Catawba Nuclear Station-Attorney-at-Law P. O. Box-12097 Palmetto Alliance Charleston, South Carolina 29412

'2135i Devine Street Columbia, South Carolina 29205 8404060073 840327 gDRADOCK05000 OFFICIAL COPY PDR 3px ll1 I

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. March 27,- 1984

' Report No.: =CA-81-018 (SD 413-414/81-11).

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Report Date: March 14, 1984 i

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JFacility: Catawba Nuclear Station' Units i and 2 97

' identification of Deficiency:

Borg-Warner Corp., Nuclear Valve Division Motor Operated Gate-Valves Description of Deficiency:

On ' June 2, - 1981, W. C._-Henry, and, J. _ K. ' Berry advi sed Mr. Art Johnson, NRC, of the following deficiency.

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= Valve'lKC230A failed during dry cycling due to the valve disc becoming wedged

-between'the body guides. Operating the valve from the closed position, the leading ~ edge.of the-lower disc guide gouged the bottom body guide such that the.

valve could not.be fully opened.. In' addition, the pull'of the operator caused the-upper side of the disc to rotate'slightly about the fixed lower side-resulting In.the disc wedging between the_ body guides. Valve Is oriented with-

,the stem. centerline'in a-horizontal-plane.

Th_is~Is an active, 8l inch, 150'Ib.,JA3ME. Class 3 gate valve'with a=Rotork s

electric. motor operator.

Borg-Warner _ Corporation, Nuclear Valve Division's Jpartl number ~Is-76110.

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" Analysis of-Safety Impiications:

Valve IKC230A-Isused to. isolate the essenttal KC header.from the nonessenttal

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header during~an accident condition.^.. Failure of this: valve to isolate could

-result in cooling water flow'to essential-components being reduced below accept-able levels :should ' the nonessential KC header' fall.

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l Corrective Action:

The Lyalve was returned' to 'Borg-Warner for 'repal r of guides and ' body rails.

Borg-Warner issued;testireport 1865Lwhich wasJused.to test the guides of low

pressure

motor operated valves manufactured prior;to May.1979 The valve'used

_~In_the.testiwas S/N:_12429 which is; identical-to.IKC230A. tThe test,showed^that.

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{ valves' oriented 67*1/20 from horizontal could fall. The-failures were caused-

'byLsharp leading _ edges lon the' disc guides 6.-It was alsolnoted-thatl closing the-

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-gap betweentthe,two guides would.also aid in solving the problem.

[Borg-Warner Informed. Duke of three other valve Items. and serial numbers of similar design' t_ hat _ should be(i.nvestigated if installed 'between

• 67 1/20 from-chorizontal. ' Attached ~is'aillst of the items and serial-numbers recommended to inspe'ct. JAll: valves lon-this 1ist werefinspected, including vertically mounted valves'and~. spare. valves with the-indic~ated serial' numbers. - The valves were-i finspe~ted.by DukeHpersonne_1 and_a Borg-Warner representative.

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l Corrective Action: ' (Continue) 1

.Borg Warner agreed' to modify all valve's investigated.

Discs from all the valves wereireturned to Borg-Warner for modifications. ~Borg-Warner completed.modifi-Jcations and returned the dises to Duke.

Dises were replaced.and checked for fit

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Lusing'bluingztest.. Six of the' discs did not pass bluing test.-- These six discs

-and the valve bodies were: returned--to Borg-Warner tothave discs matched to seats;-

Valves-have been repaired and returned to Duke. All~ modifications and repairs

.have been completed.-

' All referenced ~ valves were purchased for Catawba. McGuire~a~nd Oconee'were'no_t

.affected by this modification. -Two_of the repaired valves have been transferred to Oconee.

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Borg-Warner Corporation-Nuclear Valve Division..

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=NVD P/N Serial Nos.

item No.

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