ML17333A472
| ML17333A472 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 06/12/1996 |
| From: | John Hickman NRC (Affiliation Not Assigned) |
| To: | Fitzpatrick E AMERICAN ELECTRIC POWER SERVICE CORP., INDIANA MICHIGAN POWER CO. |
| References | |
| GL-95-07, GL-95-7, TAC-M93451, TAC-M93452, NUDOCS 9606200264 | |
| Download: ML17333A472 (8) | |
Text
June 12, 1996
< Ytp. E.
E. Fitzpatrick, Vice President Indiana Michigan Power Company c/o American Electric Power Service Corporation 1 Riverside Plaza
- Columbus, OH 43215 4'UBJECT:
REQUEST FOR ADDITIONAL INFORMATION GENERIC LETTER 95-07, "PRESSURE LOCKING AND THERMAL BINDING OF SAFETY-RELATED POWER-OPERATED GATE VALVES," DONALD C.
COOK NUCLEAR PLANT, UNITS 1
AND 2 (TAC NOS.
M93451 AND M93452)
Dear Mr. Fitzpatrick:
On August 17, 1995, the NRC issued Generic Letter (GL) 95-07, "Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves," to request that licensees take actions to ensure that safety-related power-operated gate valves that are susceptible to pressure locking or thermal binding are capable of performing their safety functions.
The NRC staff is reviewing and evaluating your response to GL 95-07.
Additional information, as discussed in the enclosure, is requested in order for the staff to complete its review.
We request that you respond within 30 days.
The information requested by this letter is within the scope of the overall burden estimated in Generic Letter 95-07, "Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves," which was a maximum of 75 hours8.680556e-4 days <br />0.0208 hours <br />1.240079e-4 weeks <br />2.85375e-5 months <br /> per response.
This request is covered by Office of Management and Budget Clearance Number 3150-0011, which expires July 31, 1997.
If you have any questions on these items please contact me at (301) 415-3017.
Sincerely, Original Signed By:
John B. Hickman, Project Manager Project Directorate III-1 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket No. 50-315 and 50-316 cc:
See next page
Enclosure:
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UNITED STATES NUCLEAR REGULATORY COMIVIISSION WASHINGTON, D.C. 20555-0001 June 12, 1996 Mr. E.
E. Fitzpatrick, Vice President Indiana Michigan Power Company c/o American Electric Power Service Corporation 1 Riverside Plaza
- Columbus, OH 43215
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION GENERIC LETTER 95-07, "PRESSURE LOCKING AND THERMAL BINDING OF SAFETY-RELATED POWER-OPERATED GATE VALVES," DONALD C.
COOK NUCLEAR PLANT, UNITS 1
AND 2 (TAC NOS.
H93451 AND H93452)
Dear Mr. Fitzpatrick:
On August 17, 1995, the NRC issued Generic Letter (GL) 95-07, "Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves," to request that licensees take actions to ensure that safety-related power-operated gate valves that are susceptible to pressure locking or thermal binding are capable of performing their safety functions.
The NRC staff is reviewing and evaluating your response to GL 95-07.
Additional information, as discussed in the enclosure, is requested in order for the staff to complete its review.
We request that you respond within 30 days.
The information requested by this letter is within the scope of the overall burden estimated in Generic Letter 95-07, "Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves," which was a maximum of 75 hours8.680556e-4 days <br />0.0208 hours <br />1.240079e-4 weeks <br />2.85375e-5 months <br /> per response.
This request is covered by. Office of Management and Budget Clearance Number 3150-0011, which expires July 31, 1997.
If you have any questions on these items please contact me at (301) 415-3017.
Sincerely, Docket No. 50-315 and 50-316 cc:
See next page
Enclosure:
As stated John B. Hickman, Project Manager Project Directorate III-1 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation
4
Mr. E.
E. Fitzpatri ck Indiana Hichigan Power Company CC:
Regional -Administrator, Region III
';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 P.O; Box. 818 Bridgman, Michigan 49106
- Al Blind, Plant Manager Donald C. Cook Nuclear Plant 1 Cook Place Bridgman, Michigan 49106 U.S. Nuclear Regulatory Commission Resident Inspector's 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,'ity of Bridgman Post Office Box 366 Bridgman, Michigan 49106 Special Assistant to the Governor Room 1
State Capitol Lansing, Michigan 48909 Drinking Water and Radiological Protection Division Michigan Department of Environmental equality 3423 Hartin Luther King Jr Blvd P. 0. Box'30630 Lansing, Hichigan 48909-8130 "Dona',d C.
Cook Nuclear Plant Hr. S.
Brewer American Electric Power Service Corporation '
Riverside Plaza.
.Columbus, Ohio 43215 May 1996
VEST OR AD TIONAL INFORMATION ONALD C.
COOK NUCLEAR P ANT UNITS I AND 2 ESPONS TO G NERIC LETT 95-07 "P
ESSU E
LOCKING AND T
M L I DING OF SAFETY-RELATE POW R-OPERATED GATE VALVES" 1.
In light of the high safety significance and due to the lengthy corrective action schedules for the four containment sump recirculation valves l-ICM-305,
-306, 2-ICH-305, -306, which extends until 1999, the staff believes it is necessary to review the licensee's calculations supporting the operability of these valves.
Please provide these calculations for our review.
2.
Valves NM0-151, -152, and -153, Pressurizer PORV Block Valves, may be susceptible to pressure locking or thermal binding during a postulated steam generator tube rupture or low temperature overpressurization event.
Please discuss how these concerns were addressed at D.C. Cook.
3.
In Attachment I to GL 95-07, the NRC staff requested that licensees include consideration of the potential for gate valves to undergo pressure locking or thermal binding during surveillance testing.
During workshops on GL 95-07 in each
- Region, the NRC staff stated that, if closing a safety-related power-operated gate valve for test or surveillance defeats the capability of the safety system or train, the licensee should perform one of the following within the scope of GL 95-07:
'l.
Verify that the valve is not susceptible to pressure locking or thermal binding while closed, 2.
Follow plant technical specifications for the train/system while the valve is closed, 3.
Demonstrate that the actuator has sufficient capacity to overcome these phenomena, or 4.
Hake appropriate hardware and/or procedural modifications to prevent pressure locking and thermal binding.'he staff stated that normally open, safety-related power-operated gate valves which are closed for test or surveillance but must return to the open position should be evaluated within the scope of GL 95-07.
Please discuss if valves which meet this criterion were included in your review, and how potential pressure locking or thermal binding concerns were addressed.
4.
Through review of operational experience
- feedback, the staff is aware of instances where licensees have completed design or procedural modifications to preclude pressure locking or thermal binding which may have had an adverse impact on plant safety due to incomplete or incorrect evaluation of the potential effects of these modifications.
Please describe evaluations and training for plant personnel that have been conducted for each design or procedural modification completed to address potential pressure locking or thermal binding concerns.
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