ML20082R939
| ML20082R939 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 12/08/1983 |
| From: | Fiedler P GENERAL PUBLIC UTILITIES CORP. |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| TASK-03-04.B, TASK-3-4.B, TASK-RR NUDOCS 8312130360 | |
| Download: ML20082R939 (2) | |
Text
o GPU Nuclear Corporation Nuclear
- = ; = 388 Forked River, New Jersey 08731-0388 609 971-4000 Writer's Direct Dial Number:
December 8, 1983 Mr. Dennis M. Crutchfield, Chief Operating Reactors Branch #5 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D. C. 20555
Dear Mr. Crutchfield:
Subject:
Oyster Creek Nuclear Generating Station Docket No. 50-219 SEP Topic III-4B Turbine Missiles During the integrated assessment of the subject SEP topic, the NRC staff requested that GPUN describe the current monitoring program for turbine control valves and reheat control valves and how it meets the intent of exercising these valves weekly and justify why cycling the valves individually to a fully closed position should not be performed.
Be four individual turbine stop valves are currently fully closed on a daily basis. Plant Operating Procedure 315.1 " Main W rbine Operation" (Revision 7) dated November 11, 1982 details ti.e daily test to insure that the turbine stop valves close completely upon a given signal.
Six reheat stop valves and six intercept valves are wide open during normal operation. To prevent them from sticking, reheat stop and intercept valves are individually brought to a full closure once a week. he intercept valves are exercised daily by moving the valve off the backseat. he reheat intercept valves are also exercised in banks of three (3) on a weekly basis.
Individual closure capability of the turbine control valves is not provided in our control system when the plant is operating. Plant Operating Procedure 315.1 Revision 7 details the periodic testing of the W rbine Emergency Governor. The purpose of the test is to verify that the turbine 8312130360 831208 PDR ADOCK 05000219 p
PDR I'O GPU Nuclear Corporation is a subsidiary of the General Pubhc UtiliSes Corporation
. control and stop valves close competely upon a turbine trip signal when the turbine generator has been reduced to a minimum load. The frequency of the testing depends upon how often the unit has a scheduled shutdown or is taken off the line for some other reason.
Very truly yours, J$n J
_edler__ - --
Vice President and Director Oyster Creek 1r/0086e cc: Administrator Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pa. 19406 NRC Resident Inspector Oyster Creek Nuclear Generating Station Forked River, N.J.
08731
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