ML20062L537

Final Deficiency Rept Re Wiring Defects in Limitorque Valve Motor Operators,Initially Reported During 801230 Telcon. Insps of All Valve Motor Operator Wiring & Connections Will Be Performed & Documented

ML20062L537
Person / Time
Site:	Limerick
Issue date:	01/28/1981
From:	Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
01CFR-050-55E, 1CFR-50-55E, NUDOCS 8102030405
Download: ML20062L537 (4)

Text

.

~

So-362 gs5 PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 PHILADELPHI A. PA.19101 (2151841 4502 v eCE PRESIDENT m a8,w Mr. Soyce Grier, Director "nited States Nuclear Pesulatory Commission Office of Inspection and 2nforcement, Region I 631 Park Avenue King of Prussia, PA 19406 S u b j e_c t_ :

31guificant Deficiency Report ?t o. 25 Final Report for Viring 7efects in Limitorque Valve Motor Goerators Limerick Generating Station. t'n i t s 1 and 2 NRC Construction Permit ?lo s. C??R-106 107 Rafarenes:

T e l e c os-of December 30, 1930 M.

t. 'Jalters (7Eco) to Lou ?la rrow ('4 RC )

File:

QUAL 2-10-2 (3DR #25)

Dear Mr. Grier:

Attached is our final report on the above subject deficiency which was reported to the USNRC per the referenced telecon in accordance with 10C7R50.55(e).

If there are any questions on the matter ves vould be pleased to discuss them with you.

Sincerely, RSH/gra Attachment.

Copy to:

Director of Inspection and Enforcement I?nited S ta tes Nuclear Regulatory Commission '

Vashington, D.C.

20555 30/f s

//

THIS DOCUMENT CONTAINS POOR QUALITY PAGES L_

810 n (l ~ g 9' 7 S

0

m.

t 1

i

)

t FINAL REPORT I

WIRING DEFECTS IN LIMITORQUE VALVE MOTOR OPERATORS i

LIMERICK GENERATING STATION UNITS 1 AND 2 t

i l

h l

i.

PHILADELPHIA ELECTRIC COMPANY JANUARY, 1981 l

I e

SDR-25-?

[

I i

{

t

l TABLE OF CONTENTS L

r i

2.0 DESCRIPTION

OF PROBLEM l'

3.0 ANALYSIS OF SAFETY IMPLICATIONS i

I 4.0 CORRECTIVE ACTION TAKEN 1

.l

5.0 CONCLUSION

S s

i i

P i

f I

i s

SDR-25-2 i

i i

?

I

?

i i

i r

i I

8

. o 3

J.0

.I.T.T.P.O.D_.C.CT I..O.i!.

The 1.inerick Pro 'ect usrn Lt:11 tu rqit.. operatorii on certaitt notor operated valven, cone of t;hich perfoni a nuetear neifety rrrir.ted function.

A uacplimi increction of I !ni torque notor o;)cratora for valvec fron neveral valve vendorn has aboun a nunber of internal uf riny deficiencica in the operators. The def tcienc!cs consist of disconnected uires, and loosely crinped ulrcs which, if not corrected, could prevent tbn o,)erators frou perfominc. their cafety related funct ton.

In crep! Lance with 10 CFR 50.55(e), this Final Peport ic issued to describe the deficiencier:, analyre tht tr safety implic.itione, and describe the action taktsn to correct then.

This ala,nificant deficiency vac reported via telecon to tbc USUFC. Perion I on I:oconhe r 'lu, l'/3J.

2.0 Dr!CPIPTIO:t OF PR03Lrit Techtul Pouer Corporation rerforned a r.anple Inspection on internal electrical connections on Limitorque ?!otor Operators for valveu reculved on cite fren various valvo vendors. As a result of thin nanpiing innpection, nucerous inproperly conn.:cted or disconnected uires ve re not ui. A 15.i appro::Imate relec: rato usa reported by Dechte!.

3.0 AJ[AL,Yjj,IlpF SAF_C,q,,,I,UlJ ICf.TIO!!J_

Poorly teminated or dInconnected trireu can he pontulated to fall in cowice and thereby render thi, rzotor operator inoperable.

Included m.ione those found uith inturnal virinc deficiencieu are valve operatora perfomin.3 safety related functions.

Therefore, narr* operation of Lincrick could have been compronloed had this condition pone undetected a":' uncorrected.

4.0 CORpjiqEE A,EIO,JLTAff,,',

nased on ti.c resultc of the inspectiona perfomed to date. n 100'l incpection of all valve cotor operator uf rine, and connections is required.

These inspections ufil be perfomed and doeurented prior to the MCV heine released for systen pre-operational testinc., and vil1 include chechs for worknanship, proper tomination, and right, correct connections of all internal viring.

5.0 COPCLt'SIO!!S The correctivo actions described above w I'.

arrect and clininate any internal utring deficiencies in Limitore,ue valve re.',c operators at Lincrick l

Cenerating Station. No further action 1, planned.

i 00 4

SDl;-25-3 J