ML18030A280
| 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 50 368 Susquehanna Steam Electric Stationi Unit 2i Pennsylva AUTH,"ARE AUTHuR AFFILIATION CURT I S P sl ~ I'I' Pennsylvania Power 4 Light Co ~
REC IP ~ 'IAt!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 SBEKU 8
AKB used in Eaton Corp motor control ctrl Based on review of vendor infoPutil has determined no preportable condition exists.
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' nd IRK 3 cooies FSAR F all a~ends'OCKET 050.003-0 K~038 u5000387 05000388 ACTION:
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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 S
PENNSYLVANIA,POWER 8, LIGHT COMPANY
Mr. Boyce H. Grier May ll, 1981 7
Toward the objective of assuring that future procurements of Westinghouse 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