ML15238A762

Informs That NRC Resident Inspector Will Be Obtaining Info on Valve Failure on Loss of Power Data.Info Needed to Resolve Unresolved Safety Issue A-47

ML15238A762
Person / Time
Site:	Oconee
Issue date:	03/09/1983
From:	Eisenhut D Office of Nuclear Reactor Regulation
To:	Tucker H DUKE POWER CO.
References
REF-GTECI-A-47, REF-GTECI-SY, TASK-A-47, TASK-OR NUDOCS 8303210120
Download: ML15238A762 (3)

Text

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-BenuLtt AEOD ECase Dockets Nos. 50-269, 50-270 KGoller and 50-287 DPFalconer, Resident Inspector, ONS P, Con jper Mr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company P. 0. Box 33189 422 South Church Street Charlotte, North Carolina 28242

Dear Mr. Tucker:

Mr. Denton's letter, dated November 29, 1982, responded to your letter of October 7, 1982, and advised.you that we intend to continue the practice of informing you of our input assumptions for our study of the Oconee 1 plant regarding the resolution of*

USI A-47.

Subsequently, my letter to you dated February 14, 1983, provided you with a list of assumptions and estimates we made as part of our program at the Oak Ridge National Laboratory.

In further pursuing this research work, we have determined that certain additional information is needed which is.not amenable to estimations or assumptions.

For example, the manner in which certain valves fail on loss of power; i.e., open, closed or-as is.

You have previously expressed your reluctance to participate in this research work, citing as one of your reasons the fiugvailability of resources. I wish to advise you that we have asked the NRC Region II Administrator to have the NRC resident inspector at Oconee obtain this needed information. Enclosed is the list of valves being transmitted to the Oconee resident inspector for which we require valve failure data on loss of power.

This activity should have little or no effect on your staff or plant operations. I hope that we can count on your cooperation on this approach to fulfilling our needs.

Sincerely, Darrell G. Eisenhut, Director B303210120 830309 Division of Licensing PDR ADOCK 05000269 P

PDR Office of Nuclear Reactor Regulation

Enclosure:

Valve List for Oconee 1 cc w/enclosure:

See next p ge L

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Duke Power Company cc w/enclosure(s):

Mr. William L. Porter Duke Power Company P. 0. Box 33189 422 South Church Street Office of Intergovernmental Relations Charlotte, North Carolina 28242 116 West Jones Street Raleigh, North Carolina 27603 Honorable James M. Phinney County Supervisor of Oconee County Walhalla, South Carolina 29621 Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission, Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Regional Radiation Representative EPA Region IV 345 Courtland Street, N.E*.

Atlanta, Georgia 30308 William T. Orders Senior Resident Inspector U.S. Nuclear Regulatory Commission Route 2, Box 610 Seneca, South Carolina 29678 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 220, 7910 Woodmont Avenue Bethesda, Maryland 20814 Manager, LIS NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33515 J. Michael McGarry, III, Esq.

DeBevoise & Liberman 1200 17th Street, N.W.

Washington, D. C. 20036

MAR0 9 g83 VALVE LIST FOR OCONEE-1

1.

IRV-120 (1065 psig)

2.

IRV-124 (1090 psig)

3.

IRV-132 (1104 psig)

4.

IRV-128 (1100 psig)

Steam line vent valve

5.

IRV-130 (1050 psig)

6.

IRV-126 (1100 psig)

7.

IRV-122 (1080 psig)

8.

IRV-118 (1104 psig)

9. MS-9 By-pass valve

10. MS-22 By-pass valve

11.

SV-1 Throttle valve

12.

CV-1 Throttle valve

13.

FDW-100 Emergency Feed valve

14. SS-V2A FDW-35 Start-up Control valve

15.

SS-V3A FDW-36 Start-up Blocking valve

16.

SS-V1A FDW-32 Main Control Valve

17.

SS-V5A FDW-31 Main Block valve

18. SS-V4A FDW-38 Emergency Feed Block valve

19.

RV-65 RC-RV4A Pressurizer Vent valve

20. RC-V5 Pressurizer Spray Control Valve

21.

CCW-108 Emergency Feed Valve from Aux-Pump

22.

CCW-106 Emergency Feed valve from Aux-Pump

23. Where is the main steam isolation valve?

24. Are there any of the emergency feed valves listed above that are operated either (a) local manual (i.e., handwheel) only, (b) remote manual (e.g., electric or air operated) only, or (c) both (a) and (b)?