ML17317B381
| ML17317B381 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 05/15/1979 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Tillinghast J INDIANA MICHIGAN POWER CO. |
| References | |
| NUDOCS 7907310588 | |
| Download: ML17317B381 (7) | |
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, TERA BGrimes JRBuchanan OELD ACRS (1) ttr. John Tillinghast, Vice Presi.dent Indiana and ttichigan Electric Company
'Indiana and ttichigan Power Company Post Office Box 18 B'owling Green Station New York, Hew York 10004
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Dear Hr,
. Tillingt>ast:
Enclosed for youl information is a copy of a letter sent to one of the licensees of a Westinghouse two loo A similar letter has been sent to the licensees of-the p plant.
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1 go<<>t'r'incerely, Original Signed By A. Schwencer, Chief Operating Reactors Branch 81 Division of Operating Reactors
Enclosure:
As Stated cc:
See next page'estingho'use two loop plants.,tiote that the use of the rod bank exchange program has not yet been approved for-other t
than these two loop plants.
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UNITED STATES NUCLEAR REG'ULATORY COMMISSION WASHINGTON, D. C. 20555 May 15, 1979 Docket Nos.
50-315 and 50-316 Mr. John Tillinghast, Vice President Indiana and Michigan Electric Company Indiana and Michigan Power Company Post Office Box 18 Bowling Green Station New York, New York 10004
Dear Mr. Tillinghast:
Enclosed for your information is a copy of a letter sent to one of the licensees of a Westinghouse two loop plant.
A similar letter has been sent to the licensees of the other Westinghouse two loop plants.
Note that the use of the rod bank exchange program has not yet been approved for other than these two loop plants.
Sincerely, A. Schwencer, Chief Operating Reactors Branch 81 Division of Operating Reactors
Enclosure:
As Stated cc:
See next page
Hr. John Tillinghast Indiana and Michigan Electric Company Indiana and Michigan Power Company 2 - May 15, 1979 cc:
Hr. Robert M. Jurgensen Chief Nuclear Engineer American Electric Power Service Corporation 2 Broadway New York, New York 10004 Gerald Charnoff, Esquire
- Shaw, Pi ttman, Potts and Trowbridge 1800 H Street, N.W.
Mashington, D.
C.
20036 David Dinsmore Comey Executive Director Citizens for a Better Environment 59 East Yan Buren Street Chicago, Illinois 60605 Haude Reston Palenske Memorial Library 500 Market Street St. Joseph, Michigan 49085 Hr.
D. Shaller, Plant Manager Donald C.
Cook Nuclear Plant P. 0.
Box 458 Bridgman, Michigan 49106 Kenneth R. Baker 2874 Robin Hood Drive Stevensville, Michigan 49127 I
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UNITED ST*TES NUCLEAR REGlJLATORY COMMISStON
'IVASHINGTON,D. C. 20555 May 'l5, 1979 Docket No. 50-305 t1r.
Eugene R. ttathews, Vice President Power Supply and Engineering Wisconsin Public Service Corporation P. 0.
Box 1200 Green Bay, Wisconsin 54305
Dear t1r. f1athews:
The Nuclear Regulatory Commission staff has reviewed information submitted by the Westinghouse Corporation and two licensees of two loop plants regarding the use of the rod bank exchange (rod swap) method to verify shutdown margin for two loop Westinghouse nuclear steam supply systems.
Based on our review, we approve the use of this method as an alternative to the boron exchange method of verifying shutdown margin for these two loop NSSSs providing the following conditions are met:
1.
The analysis for predicting rod worths and shutdown margin is performed by Westinghouse using the technique proposed to the NRC at the September 1978 meeting.
2.
All rod banks are measured.
3.
Written approval is obtained from the NRC prior to use of the rod exchange method.
Approval will be based on NRC revie~ of your review and acceptance criteria for these rod exchange tests.
Once we approve your review and acceptance criteria, they need not be resubmitted unless changed.
.4.
The test procedure for this method is that identified in a Westinghouse letter to NRC dated April 24; 1979.
Nr. Eugene R. Mathews May 15 lg7g 5.
Within 45 days after the first verification of shutdown margin using the rod bank exchange
- method, the test data is formally submitted to the NRC.
This approval is only for plants with a two loop HSSS.
Additional information and further review will be required before we can reach a conclusion on the use of this method for three and four loop plants.
Sincer ely,
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A. Schwencer, Chief Operating Reactors Branch ~l Division of Operating Reactors cc:
See next page
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