ML18036A003
| ML18036A003 | |
| Person / Time | |
|---|---|
| Site: | Zion, Cooper 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: |
| References | |
| NUDOCS 7812120121 | |
| Download: ML18036A003 (2) | |
Text
COOPER-BESS"-iViE=.
COiV'iPANY November 3, 1978 RECEIYED APR g 5 1979 NQA SECTION Office o,
- nspeci',on U.
S. nuclear Regula hashington>
0.
CD ard Enforcement 20ry Commlsslon 2GQQQ ATTiv:.Direcior. of.nspection enid En,iorcement
..= =... u n7,1 efilefj; hMt l1
= -In. accordmcE'.~d~n&Qt:.~~rt 23, this let"er.is-no'tic=-~::o..
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'defieienc~mild-9-73M'8'wi'i/i'n a
KS,' Poile"...Engine 'supo i i'e4 and.manufactured by Cooper Energy Services..
This engine. is part of the emergency standby diesel-generator se supplied
-,or installation at (4) four. licensees,'.aiions.
The exten of the deficiency is as ollows:
Each power cylinder has (1) inlet and (1) exhaust push rod assembly and (2) valve crossh'ead as'sembli es:Part -No; "Z25-1-2-:.i10.
Thi su'.-:'s=--..:bury
.':con.tai,ns; a cr.osshead,Pz'r i ti"o":JS-'25-1G;"a-ro'l l'r "-,'.:
No. JS-25-1P',.an'd a piin 'collar Pari Ho. JS-25-if<. 'iuring a.
receni performance test on. this engine, ii was found t3at..some sub-assemblies showed abnormal wear on the surface of ihe r'oiler pin.
No engine shutdown nor mal-unction has been experienced,
. but it is iel i that over a longer period of engine. operaiion this abnormal wear could progress far'nough to cause the engine to mal -function.
The corrective action iaken by C.E.S. is.to redesign to increase
'he d'i'ameter of the roller p'in (JS-25=1P)
~rov~de an-in.er-ference fit a
.assembly between the roller pin and the crosshead (JS-25-1G) and reduce the clearance between the roller pin and the collar (JS-.25-1M).
In addi iion ihe hand flaring operation to seat the pin ends into chamfer on the crosshead has been replaced by a -more consistent.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-assemblies in field units named below are
.o be inspec ied and replaced if required.
The time span for the execuiion of the change out by C.E.S.
on field uni is will be dependent upon avail-abili iy of units.for rework bu i will be done as soon as.is practi-cable.
The following engines which have had field running at the licenseo:
sites are to be inspec ed by,C.
.S.
io deiermine i-cam rollers have become sluggis'n and incipient cam scu fing is occurring.
Ca-...
or cam roller scuffing can be an indication o
a worn roiler pin or collar.
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November. 3, 1978 Nebraska Public Power, Cooper Station, SN's 7102 tt 7103.
Commonwealth
- Edison, Zion 1
5 2, SN-7090,
- 7091, 7092, 7093 7094.
The following 'eng'.naes
~t the licensees'ites w~,hach have no-.
had field'unning are tc have...the.inl.et and..xha<';st..valve cross-head asseiiblies replaced'with those of the niw d(jsign.
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.Pennsyl vani a Power 5 Light, Susouehanna 1
~ 2, S'i' 7 i 57, A
71 CA
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age.
!y mvaes ra e
'uis'faaa,,Pee'Sl';:3ight,.laeerfe7 d 3,. Si<.S -7170.a-1171,
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Bender Yice Presiden E General Nanager
...,-..CB..Reciprocating Products cc:
Hebraska Publ-i.c..Power-Cooper Station Commonweal h Edison.,
Zion 1
and 2
Pennsylvania Power:.and Light, Susquehanna 1
and 2
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Lousiana Power and Light,'ater=ord 3....
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