BECO-88-130, Provides Details for safety-related Relays & Insp Results in Response to NRC Bulletin 88-003, Inadequate Latch Engagement in Hfa Type Latching Relays Mfg by Ge

Provides Details for safety-related Relays & Insp Results in Response to NRC Bulletin 88-003, Inadequate Latch Engagement in Hfa Type Latching Relays Mfg by Ge

ML20154D570
Person / Time
Site:	Pilgrim
Issue date:	09/06/1988
From:	Bird R BOSTON EDISON CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
BECO-88-130, IEB-88-003, IEB-88-3, NUDOCS 8809150335
Download: ML20154D570 (3)

Text

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.amws.ou Pdgnm Nuclear Power Staten ,

Rcxky Hill Road i Plymouth. .'Aassachusetts 02360

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Ralph G. Bird l Semot We Presdent - Nuclear a

BECo 88- 130 i September 6, 1988 ,

t U. S. Nuclear Regulatory Commission i Document Control Desk j Hashington, DC 20555 ,

license DPR-35  !

Docket 50-293 NRC BULLETIN 88-03: INADEQUATE LATCH ENGAGEMENT L i

IN HFA TYPE LATCHING RELAYS MANUFACTURED BY GENERAL ELECTRIC (GE) COMPANY l

Dear Sir:

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t NRC Bulletin 88-03 identified safety concerns associated with GE latching-type f i HFA relays installed in Class IE (safety-related) applications and requested  ;

i licensees to perform inspections to ensure that all GE latching type HFA  !

relays installed in Class IE applications have adequate latch engagement.  :

Those relays which failwd to meet acceptance criteria were to be repaired or j replaced.

! The Bulletin also requested that those licensees having latching type HFA i j relays subject to this Bulletin provide a letter of confirmation within 30  ;

4 days of completion of inspections. This letter provides Boston Edison

! Company's response to that request, persuant to the provisions of Section 182a r 9 of the Atomic Energy Act of 1954, as amended, including the provisions of i 10CFR50.54(f).

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• BOSTON EDISON COMPANY

• Nuclear Regulatory Comission Page Two Upon receipt of NRC Bulletin 88-03, Boston Edison initiated a review to determine whether GE latching-type HFA relays subject to this Bulletin have been installed in Class IE applications at the plant. This review concluded that seven (7) relays are installed in safety related applications, ten (10) relays are installed in non-safety related applications and four (4) are in the warehouse. The attachment provides details for safety-related relays and inspection results. The relays were inspected and tested in accordance with the GE SAL 190.1. Inspection and testing was completed on August 3, 1988.

• h C- i

, R. G. Bird '

Attachment l

HGL/am/2352 Commonwealth of Massachusetts)

County of Plymouth )

Then personally appeared before me, Ralph G. Bird, who being duly sworn, did state that he is Senior Vice President - Nuclear of Boston Edison Company and that he is duly authorized to execute and file the submittal contained herein in the name and on behalf of Boston Edison Company and that the statements in i said submittal are true to the best of his knowledge and belief.

My comission expires:

DATE'

'f miI NUTARY PUBLIC M/ h

. cc: hr. D. Mcdonald, Project Manager Office of Nuclear Reactor Regulation t U. S. Nuclear Regulatory Comission

, Hall Station PI-137 '

Hashington D. C. 20555 l U. S. Nuclear Regulatory Comission Region I  !

475 Allendale Road r King of Prussia, PA 19406 l Senior NRC Resident Inspector [

Pilgrim Nuclear Power Station l 1  !

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ATTACHMEdi TO 8ECO LETTER ON j '

KC0 RESPON$E TO NRC BULLETIN 88-03 Class IE Relays l ,

I In accordance with the requirements of the NRC Bulletin 88-03, Boston Edison l

( Company has identified seven (7) latching type HFA relays which are in use in '

Class IE applications. The location and functions of the relays are l i identified below

i

Rtin location D m ing Function liotti l 1

l 105A Panel C6 EIS Load Shed Logic 12HFA54J187F l i

1058 Panel C6 EIS Load Shed Logic 12HFA54J187F 105C Panel C6 EIS Load Shed Logic 12HFA54J187F i 1050 Panel C6 EIS Load Shed Logic 12HFA54J187F [

105E Panel C' EIS Load Shed Logic 12HFAS4J187F  :

105F Panel C6 EIS Load Shed Logic 12HFA54J187F l 186-5X Panel C5 E20 Shutdown Transformer 12HFA54E63H I 1 Logic L 1 I-4 lalDiction anLIgiting i

j Inspection and testing was performed as described in GE SAL 190.1 for proper l gap width and latching engagement under the control of the Maintenance Request i Program utilizing the applicable sections of PhPS Procedure 3.H.3-30. All of l I the listed relays passed the inspection and testing, with the exception of 3

! relay 105A. Relay 105A did not have adequate latch engagement. The problem L 1 was identified to be different than that addressed in GE SAL 190.1 and }

L Bulletin 88-03. The relay had a slight latch assembly misalignment problem  !

! which was corrected. The relay repair plan was reviewed by the GE  !

i representative who also observed the repair and subsequent successful testing  ;

{ of the affected relay. ,

.i The final inspection and testing of the iden+,1fied latching HFA relays used in Class IE applications was completed on August 3,1988. The records of the i inspection and corrective actions are documented and maintained in accordance with plant procedures for Class IE equipment.

S.tKLRelD1 I I There were four (4) GE latching type HFA relays in stock with Hodel No

! 12HFA54E187H. These were modified, inspected and certified by GE for use in J safety-related applications and a new model No.12HFA154E22H was assigned by

) GE. Parts from one modified relay were used for repair of Class IE relay i #105A. These HFA relays will be re-inspected and tested for gap distance and

latch engagement prior to their use in safety-related applications, l

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