ML17331A805

Forwards Proprietary Version of Responses to NRC 810808 Request for Addl Info on Westinghouse Reactor Vessel Level Instrumentation Sys Summary Rept.Encl Withheld (Ref 10CFR2.790)

ML17331A805
Person / Time
Site:	Cook
Issue date:	09/17/1981
From:	Hunter R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML17331A806	List: ML17331A805
References
AEP:NRC:0398F, AEP:NRC:398F, NUDOCS 8109240300
Download: ML17331A805 (3)

Text

REGUI Ar JRY INFOR~ATIOIV OISTRIBJlION SYSTE~ (RIDS)

ACCESS IOV,VBR; 81092~n 30 ~ OUC. Da TE: 81/0~/17 VOTAR I ZED: .VO )OL",NET FACI 1:50 315 Oonal d ". Coox >vucl ear Po~er Pl anti Uni t 1 i Indiana 05000315 50-316 Oonala ". Coox,nuclear Po<<er Planti Unit 2i Indiana 0 5~316 AUTH.'VANE AUTHOR AFFILIATION

,HUNT=RER ~ SA Indi ana 8 ~> chi gan =1 ec tr i c Co.

RECIP,VAN=A RE"IPIENl'FFILIATIOV OEiVTOVi H.RE Office of Nuclear R actor Regulationi DirectorA SUBJ="CT: Forwards proprietary version of resoonses. to NRC 810808 r quest for addi info on Uestinghouse reactor vessel level ihstrumentation sys su3inary reot.Encl withheld (ref 10CFR2.790).

DISTR ISJTIDN CODE.: PA01S COPIES RECEIVED:LTR TITL": >ro>rietary Review Oistr iouti on-Operating Reactor ENCL J SIZE SE jP VOTES: I KE: 3 cooi es al l eater i a l ~ 05000315 ICE:3 coo.ies all ~aterial, 05000316 RECI PIENT COPIES RECIPIENT CO?I S I 3 CODE/NAl~"".'TTR EVCL IO CODE/IVAHE LTTR ENCL AC T ION: OR ~ E 1 BC jgF~g 7 7 H I iV E R i S 0

+ l( 1 1 INTERiVAL: ~Nb 2 2 1 0 RKG F ILE P1 1 1 EXTERNAL: ACRS IE l'L+ 16 16 LPDR 1 0 AVR"<<PORT 1 0 VSIC 1 0 IV T IS 1 0

's~~ sg fpgy TOTAL VUH&E< OF COPIES REQUIRED: LTTR ~ E%CL

INDIANA II MICHIGAN ELECTRIC COMPANY P. O. BOX 18 BOWLING GREEN STATION NEW YORK, N. Y. 10004 September 17, 1981 AEP:NRC:0398F Donald C. Cook Nuclear Plant Unit Nos. 1 and 2 Docket Nos. 50-315 and 50-316 License Nos. DPR-58 and OPR-74 TMI'ction Plan, NUREG-0737, Item II.F.2.3 Reactor Vessel Level Instrumentation Mr. Harold R. Oenton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, O. C. 20555

Dear Mr. Denton:

This letter and its attachments are in response to Mr. S. A. Varga's letter of August 8, 1981 which requested additional information on the Westinghouse Summary Report of the Reactor Vessel Level Instrumentation System (RVLIS) for monitoring inadequate core cooling.

Attachment 1 entitled, "Responses to NRC Request for Additional Information on the Westinghouse RVLIS Summary Report" contains the requisite information to address those questions asked in Mr. Varga's letter, except for items 2, 9, 10, 12, 16 and 20. Item 2 is addressed in Attachment 2. Item 16 is not applicable to D. C. Cook Plant since the RVLIS being installed is an analog system, not a microprocessor system..

s The information contained in Attachment 1, in its entirety, is

.proprietary to the Westinghouse Electric Corporation and must be treated in the same manner as the RVLIS Summary Report submitted in our letter.

No. AEP:NRC:0398D dated March 31, 1981. The second page of Attachment 1 further addresses this.

The remaining items 9, 10, 12 and 20 are still being addressed by Meetinghouse Electric-Corporation'with ari anticipated completiiin date of pgOI late-September. The, responses to these items will be transmitted by separate submittal upon receipt and review of those responses.

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Mr. H. R. Denton, Director AEP:NRC:0398F Although item 21 specifically requests information on the microprocessor system, which is not applicable to the D. C. Cook Plant system, the response is included to alleviate the possible misunderstanding of the RVLIS performance.

Also please note that the reference made to ITT Barton Model 752, level 8, transmitters in the discussion of Attachment 1 should be replaced with ITT Barton Model 764,'evel A, transmitters for the D. C. Cook Plant.

Very truly yours, Vice President attachments cc: John E. Dolan R. C ~ Callen G. Charnoff R. W. Jurgensen D. V. Shaller - Bridgman Joe Williams, Jr.

Region III Resident Inspector - Bridgman