ML17326B225
| ML17326B225 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 04/08/1986 |
| From: | Youngblood B Office of Nuclear Reactor Regulation |
| To: | Dolan J AMERICAN ELECTRIC POWER SERVICE CORP., INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| References | |
| NUDOCS 8604170386 | |
| Download: ML17326B225 (6) | |
Text
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'g,,i,; ,,; <"",';,~N0CL'O'ER REGULATORYCGMQISSION".',-,-',, ",
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50-315 and 50-316 Mr. John Dolan, Vice President Indiana and Michigan Electric Company c/o American Electric Power Services Corporation 1 Riverside Plaza
- Columbus, Ohio 43216
Dear Mr. Dolan:
Subject:
Interpretation of Technical Specifications that Apply to Borated Water Addition to the Reactor Coolant System from the Refueling Water Storage Tank By letter dated February 28, 1986, the Indiana and Michigan Electric Company advised the NRC of an interpretation of several technical specifications as they apply to borated water addition to the reactor coolant system from the refueling water storage tank.
.The refueling water storage tank (RWST) is a dedicated source of borated water to replenish the primary system whenever required (during all modes and throughout the fuel cycle).
The boron concentration in the RWST is controlled by Technical Specification limits and is based on meeting the 5 percent shutdown margin on reactivity for refueling (Mode 6).
The required shutdown margin for other modes is less and is also controlled by Technical Specification with the minimum of 1. 0 percent required for operation (Node 1).
Therefore the 5X requirement for refueling is more than enough for other modes including operation.
Even in the unusual event that the concentration in the RWST is less than that in the primary system, we would not be con-cerned about boron dilution or mixing.
We find the IMEC interpretation of the existing Technical Specifications to be correct.
On March 14 and 27,
- 1986, IMEC submitted proposed Technical Specifications to, among other things, clarify this interpretation and to account for RHR operation with new fuel in the core; this latter change being a reported overconseevatism as a result of recent boron dilution analyses by INEC.
These changes do not change the boron concentration of the RWST and there-fore do not influence the above interpretation.
We are in the process of reviewing the proposed changes and agree that some clarification of the 3eb ebo003i5 oboe ebO+>~
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Mr. John Dolan Indiana and Michigan Electric Company Donald C.
Cook Nuclear Plant CC:
Mr.
M. P. Alexich Vice President Nuclear Operations American Electric Power Service Corporation 1 Riverside Plaza
- Columbus, Ohio 43215 Attorney General Department of Attorney General 525 West Ottawa Street Lansing, Michigan 48913 Township Supervisor Lake Township Hall Post Office Box 818 Bridgman, Michigan 49106 W.
G. Smith, Jr., Plant Manager Donald C.
Cook Nuclear Plant Post Office Box 458 Bridgman, Michigan 49106 U.S. Nuclear Regulatory Commission.
Resident Inspectors Office 7700 Red Arrow Highway Stevensville, Michigan 49127 Gerald Charnoff, Esquire Shaw, Pittman, Potts and Trowbridge 1800 M Street, N.W.
Washington, DC 20036 Mayor, City of Bridgeman Post Office Box 366 Bridgman, Michigan 49106 Special Assistant to the Governor Room 1 - State Capitol Lansing, Michigan 48909 Nuclear Facilities and Environmental Monitoring Section Office Division of Radiological Health Department of Public Health 3500 N. Logan. Street Post Office Box 30035 Lansing, Michigan 48909 The Honorable John E. Grotberg United States House of Representatives Washington, DC 20515 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 J. Feinstein American Electric Power Service Corporation 1 Riverside Plaza
- Columbus, Ohio 43216
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Hr. John Dolan (j g APR 19B6 Technical Specifications may be helpful for future operations,
- however, this clarification proposal by IMEC is not a required replacement of this interpretation.
If you have any questions on this matter, please let me know.
Sincerely, cc:
See next page B. J.
Youngblood, Director PWR Project Directorate 84 Division of PWR Licensing-A DISTRIBUTION:
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