ML17334A527

Forwards Response to NRC 840221 Request for Addl Info Re Seismic Qualification of Mercoid Pressure Switches & Relays. Switches in Both Units Will Be Replaced by End of Next Unit 2 Fuel Outage.Agastat 7000 Relays Seismically Qualified

ML17334A527
Person / Time
Site:	Cook
Issue date:	06/01/1984
From:	Alexich M INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML17320B089	List: ML17320B088 ML17320B090 ML17334A527
References
AEP:NRC:0001D, AEP:NRC:1D, NUDOCS 8406060031
Download: ML17334A527 (9)

Text

REGULATOR INFORMATION DISTRIBUTION ~l'EM (RIDS)

ACCESSION NBR:8006060031 DOC,DATE: 80/06/01 NOTARIZED; NO . DOC ¹ FACIL:50"315 Donald C ~ Cook Nuclear Power Pl anti Unj 50-316 Donald C, Cook Nuclear Power Plant~ Unit 2~ Indiana t,ii Indiana &

L 05000316 AUTH'AME AUTHOR AFFILIATION ALEXICH<M~ P. Indiana 8 Michigan Electric Co, RECIP,NAME RECIPIENT AFFILIATION DENTON~H ~ Ro Office of Nuclear Reactor Regulationr Director SUBJECT; Forwards response to NRC 840221 request for addi info re seismic qualification of Mefcoid pressure switches 8 in both units will be replaced by end of next Unit relayswitches 2 fuel outage'gastat 7000 relays seismically qualified, DISTRIBUTION CODE: A048S COPI'ES RECEIVED: LTR ~ ENCL ~ SIZE; g +Cf3+

TITLE: OR/Licensing Submitt  : Equipment Qualification NQTEs: 5~ 84'++ /7M RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL NRR ORB1 BC NIGGINGTONg 0 01 1 1O ELo/HDS3 IE FILE 1212'NTERNAL.:

09 GC NRR KARSCHgR 13 NRR/DE/EQB 07 Ia NRR/DL DIR 14 NRR/DL/ORAB 06 1 NRR/DS I/AEB 04 1 lo RGN3 EXTERNAL: ACRS 15 LPDR 03 2 24 NRC PDR 02 NSIC 05 1 io NTIS 31 1 1o TOTAL NUMBER OF COPIES REQUIRED: LTTR 26 ENCL

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IN DIANA 8 M I CH I GAN ELECTRIC COM PAN Y P.O. BOX 16631 COLUMBUS, OHIO 43216 June 1, 1984 AEP:NRC:0001D Donald C. Cook Nuclear Plant Unit Nos. 1 and 2 Docket Nos. 50-315 and 50-316 License Nos. DPR-58 and DPR-74 Seismic Qualification of Eleotrioal Equipment Request for Additional Information Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Reference:

Letter from Mr. Steven A. Varga, NRC to Mr. John E. Dolan dated February 21, 1984

Dear Mr. Denton:

,This letter and its Attachments transmit the additional information requested in the above referenced letter regarding the seismic qualification of the Mercoid Pressure Switches and Relays.

The following are the II1diana 4 Michigan Electric Company's responses to the items noted in the above referenced letter:

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A copy of the Acton Laboratory Test Report is enclosed as Attachment No. 1, summarizing a test program conducted on various models of Mercoid Type DAW pressure switches. The models tested cover all of the types and ranges used for interlock and trip purposes in the safety systems.

A replacement program is in progress at D. C. Cook Plant to replace all other types of pressure switches used for interlock and trip purposes in safety systems with the type DAW switch. At this time, 18 switches out of 97 have been replaced in the 2 Units. All switohes in both units will be replaced by the end of, the next refueling outage for Unit 2.

e In the Donald C..Cook Nuolear Plant, Agastat 7000 and E7000 series relays and their predeoessor 2400 series relays are installed in the safety systems. AEP:NRC:0001A submitted the qualification data for the E7000 series relays. We have since made a comparison study between the 7000 series relay and the E7000 series relay and 8406040031 840601 PDR 'ADOCK 050003i5 f P -

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Mr. Harold R. ton AEP:~ NRC:~ 0001D have found no significant differences between them. Based on our engineering evaluation, we believe that the 7000 series of Agastat relays are seismically qualified by the E7000 series qualification report. A copy of document no. E7012/E7020 is enclosed as Attachment No. 2. Sheet 19 of 22 of Attachment No. 2 identifies the failure "

criteria for the contacts during the seismic testing for the Non-Operating Mode, the Operate Mode and the Transitional Mode. The functionality of the relay was demonstrated by monitoring the contacts during the seismic tests for the modes listed.

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General Electric Co. Model 12PJC11AV1A and 12PJC11X1A relays are used in the 4 kv switchgear. The relay elements are physically similar in both models, differing only in the current r ating of the operating coils. The 12PJC11AV1A relay has one element in a semi-flush mounted case. The 12PJC11X1A contains 3 elements in a single case. The mounting method, physical dimensions, and moveable elements of both types of relays are identical. Therefore, based on our engineering evaluation, it is our belief that the qualification testing for the 12PJC11AV1A relay as transmitted by our letter AEP:NRC:0001B is also applicable to relay 12PJC11X1A.

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This document has been prepared following Corporate procedures which incorporate a reasonable set of controls to insure its accur acy and completeness prior to signature by the'undersigned.

Very truly yours, M. P. Alexi ) ) fg'k Vice President

~l'PA/cm Attachments cc: John E. Dolan (w/o attachments)

W. G. Smith, Jr . - Bridgman (w/o attachments)

R. C. Callen (w/o attachments)

G. Charnoff (w/o attachments)

E. R. Swanson, NRC Resident Inspector - Bridgman (w/o attachments)

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ATTACHMENT NO. 1 TO AEP:NRC:0001D

ATTACHMENT NO. 2 TO AEP:NRC:0001D