ML18030A280

Final Deficiency Rept Re Derated Westinghouse Circuit Breakers,Types Jb,Kb & Akb Used in Eaton Corp Motor Control Ctrs.Based on Review of Vendor Info,Util Has Determined No Reportable Condition Exists

ML18030A280
Person / Time
Site:	Susquehanna
Issue date:	05/11/1981
From:	Curtis N PENNSYLVANIA POWER & LIGHT CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
PLA-774, NUDOCS 8105150157
Download: ML18030A280 (3)

Text

REGULATA Y INFORMATION DISTRIBUTION STEH (RIOS)

A ACCESSION NdR:8]05]50]5/ OUC ~ DATE+ 81/05/11 NOTARIZED: 140 FACIL:50-3EI7 Susquehanna Steam Electric Stations Unit lr Pennsyl va 050.003-50 368 Susquehanna Steam Electric Stationi Unit 2i Pennsylva 0 K~038 AUTH, "ARE AUTHuR AFFILIATION CURT I S P sl ~ I'I' Pennsylvania Power 4 Light Co ~

REC IP ~ 'I At!K RKC IP IEN T AFFILIATION GRIERP 6 ~ H ~ Region ]P PniladelphiaP Office of the Director

SUBJECT:

Final deficiency rept re der ated 'oestinghouse circuit breakersPTypes ctrl Based on review preportable condition exists.

a~ends'OCKET SBEKU 8 AKB used in Eaton Corp motor control of vendor infoPutil has determined no DISTRIBUTION CODE: 00100 COPIES RECEIVED:LTR ) ENCL Q SIZE:

TITLE: Construction Deficiency Report (]OCFR50.55K)

NOTES:Send II]K 3 copies FSAR 0 all amends' u5000387 nd IRK 3 cooies FSAR F all 05000388 I

IiEC IP I EN T COPIES RECIPIENT COPIES IO CODE/NAIVE LTTR ENCL ID CODE/NAME LTTR EN L ACTION: A/0 LICKNSNG 04 LIC BR 42 BC 05 1 RUSHBROUKr4i ~ 06 STARKPR ~ 07 1 INTERNAL: ASL BP/J ~ HAHO O/OIR Hue FAC]5 EOv' STAFF ]9 E4UIP QUAL 6R] ]

hYU/GKG BR 22 ILK 09 IE/EKS LIC QUAL BR 12 tz>P 0 2v NRC PDR 02 OKLD 21 PRO, T- REV 13 QA BR 14 EG F LE 01 STANDRDS DEV 21 EXTERNAL: AC~8 ]6 fe 1 LPDR NSIC 05 1 g!]v 8 198)

TOTAL NUNBEc< OF COPIES REQUIRED: LTTR '3< ENCL

PPRL TWO NORTH NINTH STREET, ALLENTOWN, PA. 18101 PHONE: {215) 770-5151 NORMAN W. CURTIS Vice President.Engineering & construction-Nuclear TTO 538t May ll, 1981 Mr. Boyce H. Grier Director, Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 SUSQUEHANNA STEAM ELECTRIC STATION DEBATED WESTINGHOUSE CIRCUIT BREAKERS ERs 100450/100508 FILE 840-4/900-10 PLA-774 7

Reference:

PLA-591 dated 12/19/80

Dear Mr. Grier:

The referenced letter describes a condition involving the derating of Westinghouse types JB, KB and HKB circuit breakers used in Eaton Corporation motor control centers.

Further information on the cause and extent of the defect and its resultant safety implications has been received and evaluated by PP&L. Based upon this additional information, we have now concluded that a reportable condition does not exist.

Original information provided to Bechtel Power Corporation by Eaton Corporation indicated that the derating was applicable to Westinghouse circuit breakers manufactured between April, 1979 and January, 1981. However, the time period has since been revised to include the referenced breaker types which had been manufactured between November, 1980 and January, 1981. This new informa-tion was provided in a letter dated January 28, 1981 - Eaton Corporation to Bechtel Power Corporation.

Based on the <<ev'sed ime period pertinent to the manufacture of breakers which recuire derating, Bechtel Project Engineer'ng has determined that there are no breakers at Suscuehanna SFS whicn are affected. In addition, a check of spare breakers purchased by PPGL has determined that none of the items in stock in the SSES Storeroom could have been manufactured dur'ng the time period of conce n.

J

~ t, )5i PENNSYLVANIA,POWER 8, LIGHT COMPANY S

Mr. Boyce H. Grier May ll, 1981 Toward the objective of assuring that future procurements of Westinghouse 7

types JB, KB and Hi% circuit breakers would not have the subject deficiency, Bechtel Project Engineering pursued the identification of the cause of the deficiency and corrective actions taken with Westinghouse. It was learned that although the subject breakers can interrupt thei" original rated fault current, the breaker casing develops cracks after such operation's and must be replaced.

Further, it was determined that Westinghouse has redesigned the casings for type JB, KB and HKR breakers and is currently in production of fully rated units.

We trust the Commission will find the conclusions of this evaluation to be acceptable.

N ~ W. Curtis Vice President-Engineering G Construction-Nuclear Fr.W: sab cc:'r. Victor Stello (15)

Director-Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. G. McDonald, Director (1)

Office of Management Information a Program Control U. S ~ Nuclear Regulatory Commission Washington, D.C. 20555 Mr. Gary Rhoads U. S. Nuclea Regulatory Commission P.O. Box 52 Shickshinny, PA 18655