ML20024F675
| ML20024F675 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 09/01/1983 |
| From: | Fiedler P GENERAL PUBLIC UTILITIES CORP. |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| TASK-09-05, TASK-9-5, TASK-RR NUDOCS 8309090568 | |
| Download: ML20024F675 (2) | |
Text
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c GPU Nuclear Corporation NHC Mr 100 lnterpace Parkway Parsippany, New Jersey 07054 201 263 6500 TELEX 136-482 Writer's C..ect Dial Number:
September 1, 1983 Mr. Dennis M. Crutchfield, Chief Operating Reactors Branch #5 Division of Licensing U.S. Nuclear Regulatory Consnission Washington, D. C.
20555
Dear Mr. Crutchfield:
Subj ect : Oyster Creek Nuclear Generating Station Docket No. 50-219 SEP Topic IX-5 Ventilation Systems During the integrated assessment of the subject SEP topic, the NRC staff indicated that the motors for the core spray pump, the core spray booster pump and the containment spray pump may not be qualified to operate in environmental temperatures that would occur upon a loss in Reactor Building ventilation.
The staf f requested GPUN to either (1) demonstrate that these motors are qualified, (2) replace these motors with motors qualified for the environmental conditions or, (3) provide a safety grade ventilation system to ensure adequate cooling to these motors.
The containment spray pump motors (PM-51-1-1,2,3,4) and core spray pump motors (NZ-01-A,B,C,D) are located in the Reactor Building corner rooms at Oyster Creek Nuclear Generating Station. Our analysis indicates that the maximum temperature expected in these corner roots would be 173*F under the design basis loss of coolant accident with the rated 500 hp motor operating at the maximum expected continuous demand load of 485 hp and without fan cooling.
Detailed calculations along with conservative assumptions used in the analysis, are provided in Amendment 42 to the Oyster Creek Facility Design Safety Analyses Report (FDSAR) dated October 23, 1968.
The latest System Component Evaluation Work (SCEW) sheets for Oyster Creek environmental qualification program submitted to you on October 23, 1981 show that the core spray and containment spray pump motors are designed to function in the environment with temperatures of up to 185*F and 203*F, respectively.
There are four full-capacity core spray booster pumps (NZ-03-A through D) in the Oyster Creek Reactor Building (outside the corner rooms). Two (NZ-03-B & D) of the four pumps, which are located at elevction 26 ft.,
are in a non-harsh temperature environment following a high energy line break. Also, these pumps (N2.-03-B & D) are energized by independent power supplies. With t.he single failure criterion, the core spray system can still function to maintain adequate cooling in the reactor vessel.
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GPU Nuclear Corporation is a subsidiary of the General Public Utilities Corporation
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I-i Therefore, the core spray and containment apray pump motors in the corner rooms of the React::r Building and two of the full-capacity core spray booster pump j
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motors in the Reactor Building are adequately designed to cope with the temperatures expected at their locations following a high energy line break in the Peactor Building.
Very truly yours,
[U Vice President and Director Oyster Creek 1r cc: Administrator Region I U.S. Nuclear Regulatory Comciission 631 Park Avenue King of Prussia 3 Pa.
19406 NRC Resident inspector
- Oyster Creek Nuclear Generating Station Forked River, N.J.
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