ML17332A616
| ML17332A616 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 03/06/1995 |
| From: | John Hickman NRC (Affiliation Not Assigned) |
| To: | Fitzpatrick E INDIANA MICHIGAN POWER CO. |
| References | |
| GL-92-08, GL-92-8, TAC-M85538, TAC-M85539, NUDOCS 9503140435 | |
| Download: ML17332A616 (6) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 2055&0001 March 6, 1995 Mr. E.
E. Fitzpatrick, Vice President Indiana Michigan Power Company c/o American Electric Power Service Corporation 1 Riverside Plaza
- Columbus, Ohio 43215
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING THERMO-LAG RELATED AMPACITY DERATING ISSUES FOR D.C.
COOK UNITS 1
AND 2 (TAC NOS.
M85538 AND M85539)
Dear Mr. Fitzpatrick:
By letter dated December 21,
- 1994, you submitted a response to our request for additional information (RAI) dated September 23, 1994, related to Generic Letter (GL) 92-08, "Thermo-Lag 330-1 Fire Barriers," for D.C. Cook, Units 1
and 2.
You indi cated that calculations using a computer model confirmed that the original cable raceway design included sufficient margin to accommodate the temperature rise resulting from wrapping the raceways with Thermo-Lag material.
The NRC staff has identified a number of concerns associated with certain ampacity derating calculations and test methodologies which have been used by some licensees.
Also, the staff is not aware of any industry-recommended analytical models for assessing ampacity margins of cables in raceways covered with Thermo-Lag.
While the use of a mathematical model to determine the ampacity derating factor for electrical raceways enclosed by Thermo-Lag material is acceptable as a substitute for testing, the staff needs to examine the technical adequacy of the models used in order to address compliance with GL 92-08.
Therefore, we request that you submit those ampacity derating calculations which are representative of each electrical raceway design (e.g., conduit, cable tray, air drop) at D.C.
Cook which will adequately demonstrate the methodology and validation of the computer model used as well as any other documents which support these determinations.
Please respond to this RAI within 60 days after receipt of this letter. This response is needed to close out the ampacity derating issue per GL 92-08 for D.C. Cook.
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This requirement affects fewer than ten respondents and, therefore,,is
- not, subject to Office of Management and Budget review under Public Law 96-511.,
,I Should you have any questions, please contact me at (301) 415-3017.
Sincerely, ORIGINAL SIGNED BY Pl l
John B. Hickman,'roject Hanager Project Directorate, II-I-l Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation Docket Nos.
50-315 and 50-316 DISTRIBUTION (Docket Fj 1 e PUBLIC E.
Adensam J.
Hickman ACRS(4)
PDIII-1 Rdg File J.
Hannon C. HcCracken OGC W. Kropp, RIII R.
Ingram C. Jamerson C. Berlinger R. Jenkins H. Gamberoni DOCUMENT NAME:
G: iWPDOCSiDCCOOKiC085538. RAI To receive a copy of this document, indicate In the born C
rr Copy without attachment/enclosure "E
rr Copy with attachment/enciosure N" m No copy OFFICE NAME LA:PD31 CJamerson PH: PD31 JHickman D: PD31 JHannon DATE 9/
/95 3/~
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Mr.
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Fitzpatri ck Indiana Michigan Power Company CC:
Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 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 Al Blind, Plant Manager Donald C.
Cook Nuclear Plant Post Office Box 458
- Bridgman, Michigan 49106 U.S. Nuclear Regulatory Commission Resident Inspector Office 7700 Red Arrow Highway Stevensville, Michigan 49127 Gerald Charnoff, Esquire
- Shaw, Pittman, Potts and Trowbridge 2300 N Street, N.
W.
Washington, DC 20037 Mayor, City of Bridgman Post Office Box 366 Bridgman, Hichigan 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 3423 N.
Logan Street P. 0.
Box 30195
- Lansing, Michigan 48909 Donald C.
Cook Nuclear Plant Mr. S.
Brewer American Electric Power Service Corporation 1 Riverside Plaza
- Columbus, Ohio 43215 Dccanber 1993
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