ML15239A476
| ML15239A476 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 03/25/1993 |
| From: | Wiens L Office of Nuclear Reactor Regulation |
| To: | DUKE POWER CO. |
| References | |
| TAC-M85833, TAC-M85834, NUDOCS 9303310147 | |
| Download: ML15239A476 (4) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 61 March 25, 1993 Docket Nos. 50-270 and 50-287 Mr. J. W. Hampton Vice President, Oconee Site Duke Power Company P. 0. Box 1439 Seneca, South Carolina 29679
Dear Mr. Hampton:
SUBJECT:
POST-LOCA BORIC ACID CONCENTRATION CONTROL SYSTEM (TACS NOS. M85833 AND M85834)
Your letter dated January 12, 1993, informed us of a change in your commitment to install instrumentation providing positive indication of the functioning of the subject system. Although the instrumentation was installed, it may not be able to be placed in service in some accident scenarios. This is due to potentially high radiation levels preventing access to manually operated valves which isolate the flow sensors under non-accident conditions. This change in your commitment would only apply to the "B" leg of the boric acid control system in Units 2 and 3.
To resolve this issue, you propose to upgrade the power supply and position indication for valve LP-3 in both Units 2 and 3 to safety grade. This modification would provide safety grade control and indication in the Oconee control room for all valves which must operate to actuate this train of the system. Valve LP-4 in the Unit 2 system is a manual valve with no indication in the control room; however, procedurally it is required to be verified open when the LPI system is in its Engineered Safeguards Standby alignment. You indicate that the modifications to valve LP-3 in conjunction with the procedural controls on valve LP-4 provide control room personnel with the means to determine the status of the "B" leg of this system in Oconee Units 2 and 3.
We have reviewed your proposal and conclude that the modifications to the power supply and indication for LP-3 in Units 2 and 3, and the administrative controls for LP-4 in Unit 2 are adequate for the operators to determine the lineup status of the "B" leg of the Post-LOCA Boric Acid Concentration Control System in Oconee Units 2 and 3. Confirmation of the system lineup will provide adequate assurance that the necessary flow will be present when required and, thus, your proposal is acceptable.
9303310147 930325 PDR ADOCK 05000270 P
PDR NB IECNE If
Mr. J. March 25, 1993 If you have questions regarding this matter, contact me at (301) 504-1495.
Sincerely,
/s
/
Leonard A. Wiens, Project Manager Project Directorate 11-3 Division of Reactor Projects-I/II Office of Nuclear Reactor Regulation cc:
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//93
/193/93 1_/1693 OFFICIAL RECORD COPY FILE NAME:
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Mr. J. W. Hampton
-2 If you have questions regarding this matter, contact me at (301) 504-1495.
Sincerely, Leonard A. Wiens, Project Manager Project Directorate 11-3 Division of Reactor Projects-I/II Office of Nuclear Reactor Regulation cc:
See next page
Mr. J. W. Hampton Duke Power Company Oconee Nuclear Station cc:
Mr. A. V. Carr, Esquire Mr. M. E. Patrick Duke Power Company Compliance 422 South Church Street Duke Power Company Charlotte, North Carolina 28242-0001 Oconee Nuclear Site P. 0. Box 1439 J. Michael McGarry, III, Esquire Seneca, South Carolina 29679 Winston and Strawn 1400 L Street, NW.
Mr. Alan R. Herdt, Chief Washington, DC 20005 Project Branch #3 U. S. Nuclear Regulatory Commission Mr. Robert B. Borsum 101 Marietta Street, NW. Suite 2900 Babcock & Wilcox Atlanta, Georgia 30323 Nuclear Power Division Suite 525 Ms. Karen E. Long 1700 Rockville Pike Assistant Attorney General Rockville, Maryland 20852 North Carolina Department of Justice Manager, LIS P. 0. Box 629 NUS Corporation Raleigh, North Carolina 27602 2650 McCormick Drive, 3rd Floor Clearwater, Florida 34619-1035 Mr. G. A. Copp Licensing -
ECO50 Senior Resident Inspector Duke Power Company U. S. Nuclear Regulatory Commission P. 0. Box 1006 Route 2, Box 610 Charlotte, North Carolina 28201-1006 Seneca, South Carolina 29678 Regional Administrator, Region II U. S. Nuclear Regulatory Commission 101 Marietta Street, NW. Suite 2900 Atlanta, Georgia 30323 Mr. Heyward G. Shealy, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201 Office of Intergovernmental Relations 116 West Jones Street Raleigh, North Carolina 27603 County Supervisor of Oconee County Walhalla, South Carolina 29621