ML17138A726

Notifies of Deficiency Discovered 780913 Re S/Ksv Power Engine Supplied by Cooper Energy Svc.Some sub-assemblies Showed Abnormal Wear on Surface of Roller Pin.Roller Pin Will Be Redesigned

ML17138A726
Person / Time
Site:	Susquehanna, Waterford, Zion  File:ZionSolutions icon.png
Issue date:	11/03/1978
From:	Bender B COOPER INDUSTRIES, INC.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
Shared Package
ML17138A727	List: ML17138A726 ML18036A003 ML20064G591
References
REF-PT21-78-084-001 NUDOCS 7908080684
Download: ML17138A726 (5)

Text

COOPERS-acSS VE"-P.

COM~an'E'ovember 3, 1978 RECEiVED APR 35 t979 8QA sEcTIQ!f Office of Inspection and Enforcement U.

S.

Nucl ear ReguEa.ory Commission Masn ing ton, 0.

C.

20555

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A;TN: =-Director of :nspection,and

.Ei>,Torcemeni 4

.:=.-=:. Ge.nil eye 0;..

=,. In. ac.cor dmce.wm~n&.O.C~P.nr.t.. Z,l, thi s 1 et~er.i s-no.'i Fi ca-~ i o.

. "of-'-a

'dei-i ci ency~auEid t3'-28-wi i)in w KS,=Poire,

. Engine'upo.i'i ell and manufactured by Cooper Energy Services:;

.This engine-is part of-the emergency standby diesel-generator..se suppl ied =or installation at (4) four. licensees.'tations.

The extent of the deficiency is.

as follows:

Each power cylinder has (1) inlet and (1) exhaust push rod assembly and (2) valve

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'crossh'ead ass'emblies"-Part--No;.-Z25-1-2=:10."

This sub-ass:,'.':eely

-.:con.tai.ns; a 'crosshead

.P~'ri-bio";JS--25--iG;"a-rol.lc.r----'.;.

tio. JS-25'-1P";;anl

'a pin collar Part iso.

JS-25-it~i. 'uring a.

recent performance test on. this engine, it was found that some sub-assembl i es showed abnormal.

v'(ear on the surface of the -r'oil er pin.

No engine shutdown nor mal-function has been experienced,

.. but it is felt that over a longer period of 'engine'. operation this abnormal wear could progress far'nough to cause the engine to mal-function.

The corrective action taken by C.E.S. is.to redesign to increase the diameter of the roller pin (JS-25-=1P)~o~rov~dg-an-inter-ference fit at...assembly between the roller pin and the crosshead (JS-25-1G) and reduce the clearance between the roller pin and the collar (JS-25-1H).

In addition the hand flaring operation to seat the pin ends into chamfer on the crosshead has been replaced by a -more consistent.

and positive press operation.

The sub-assembl i es in fiel d uni ts named below are

- to be inspected and replaced if required.

The time span for the execution of the change out by C.E.S.

on field units will be dependent upon avail-ability of units. for rework but will be done as soon as.is practi-

'able.

The following engines which have had field running at the licensee

'ites are to be inspected by.C.E.S.

to determine if cam rollers have become sluggis'n and-incipient

'cam scuffing is occurring.

Can.

or cam roller scuffing can be an indication of a worn roller pin or collar.

CONTINUED

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November 3, 1978 Nebraska Public Power, Cooper Station, SH's 7102 E 7103.

Commonwealth

Edison, Zion 1

8 2, SN-7090,

7091, 7092, 7093

.5 7094.

The zolloi~-ing 'engines at'he licensees'ites;wn

~ch have nol had field'unning are to have...the..i.nl.et and..xhatjst. valve cross-head assemblies replacec "w"ith'those of tl e n~w dc]sign.

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.Pennsylvania Power 8 Light, Susquehanna 1

5 2, Sii's 7157;-~, ~

'ooie'sana.,pogm-':8M'ha,'.Matert'opd 3, S4'.a.:U?0

.>=:71U.-.

'3-~-/D Yice President I? General Yianager

-,.....CB..Reci proc,at.i,ng Products I

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Nebraska Publ-i.c..Powe.r,'ooper Station Commonwealth

.Ed-ison.,

Zion 1.and 2

'ennsylvania Power. and Light, Susquehanna 1

and 2

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'Lousiana Power and Light, Waterford 3....

~OCFR 0"grt Pf gQfg jjf~>-~.~ 6~ 6 4oflctoncf found Q )3y8 <~th~>

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~ Ca On 4ePW':<~ QGQ GL5ngfocguz qQ by Coo~ E oyez'9 no supp'gQ

'--'-"-k---'-'aif;et) t<

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'e~ generator'et sunup>~ed fo~

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N%0RC of the tfQflcfoncg ft hs fo))o~s:

E'ach f ) 4n)0C end ()) exhaust push rod assembly and (2) volvo ac pa~ex cy)fndez

.- ~:..~~,:e~"-,.-..eposshea6 Asse~b)los Part No. 225-)-2'SPQ.

This sub-asseaMp

-=...,'.-;~=,- cusSs4ssa e ~mesh~a0 Part h'a. JS-H-46, a zo43er pSn'P~~t

~~~~<,.~--.'~. 03 Pl-) 0'< am( e pan co4 K@z Port, Ho. 3S-25-)A.

Duffng e

= '-~+~~.'--~-,pocoelt paz'fomante tost on thfs engine, 4t mes found that so~a

= ~'a=.~;,Cab-Oeseabl)ee she~ad cbnoreaT eeaz on the surface of the col)oz

~"-4$-,.-:,-'-.p$ 9 Qo Gnglno ohU&doN nor mal-Junction has been e

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. g="'~-" ~'848 8't Chal over' longoz period of eng)ne ayqrat4aa th4s Qx ct'nto

;~'~$;, '.. 89m0~4'uonv coo>4 progress vaz enough to cause the enyo t

ng fee 0

~'.".'-'.~q@i-~- am cowtactlve @ctfon Rake@ by c.E.$. fs to redesign to fnczoaso.

'.~~.~~'~ diane'z'f the ro)>co p$ n (JS-25-1P) to pzav<0o an 4 tez<<-

ss@lz~~y ~+~teen th~ ~o~~8~ p~n and L~~ eros

-.~'=":....,-.-..',$4'5 29 )fij'ae8. eAre Che clearance bet~een the wo))er pin and z';:=< -<~".':. the eel)CZ'JS R'5-fN).

S6 addttfOn the hand flaring aPerat)an

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sent the @4'ndS tnto chamfer on the crosshead has been

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', Mplocad bg 0 more cons)stone zi 0 pos$ t$ ve press operatfcn.-

Yhe Caw<<GCseabltos 4n fields un4tw namoO belbs are to be tncpected

.- ~,'.'~:"ace,mefeeed tf ",aqo$ eed.

%he t)me span Fat'he execution af'he

"~'>.@-'.~.> C540$ 0 oMC 5g C.K.S-on ffe]d units M$))

bo dependent upon eva'f7-

':--;~j".g..'-.'Gb$lctp'f uoltn for t'oziowfc but. ~4)1 be done as soon as fs yractl-

.. -.'.+j:,";~--Vf$0 VO)lavtag eny4nes

~hleb bove nod f'te76 rvnnfng at the 7fcensee

--"'--, i>"-'ltes ceo to ba inspected by C,E.S.

to determine tf ca~ 'ro73ers

=.>-;~+->> > @8M boC044.'IQ99'ash and lnckplent eve scuffing ks otcurrkng.

Caa

-.--==~~~:--;-"QF eon t'01)otcuff'$n'g can be an 3nd$ catfon'of a worn roller p$ n

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..c~~'~.'-';4+ad Plaid runntny ara to hn(to tho ln'lat ond exhaust 4(alvo cross

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