ML20079F125
| ML20079F125 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 01/10/1984 |
| From: | Musolf D NORTHERN STATES POWER CO. |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| GL-83-41, NUDOCS 8401180111 | |
| Download: ML20079F125 (2) | |
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Northern States Power Company 414 N codet Ma!I unneapons Mirnesota 55401 Teepnone i612) 330-5500 Janua ry 10, 1984 Director Office of Nuclear Reactor Regulation U S Nuclear Regulatory Commission Uashington, DC 20555 PRAIRIE ISLAND NUCLEAR GENERATING PLAhT Docket Nos. 50-282 License Nos. DPR-42 50-306 DPR-60 Information Related to Fast Cold Starts of Diesel Generation (Generic Letter 83-41)
In a letter dated December 16, 1983 from Darrell G Eisenhut, Director Division of Licensing, USNRC, we were asked to supply additional informa-tion related to Fast Cold Starts of Diesel Generators. We were requested to report how many times in the past year (December 1,1982 to December 1, 1983) emergency diesel generators were subjected to a fast cold start (without prelubrication and warmup of any moving parts of the diesel generators). We were asked to provide data on a per machine basis, for each of the following three categories; (a) surveillance testing, (b) maine tenance activities, and (c) actual demands.
Prairie E31s.ad expe rienced two fast, cold starts and 81 cold starts with the emergency diesel generators from December 1, 1982 to December 1, 1983.
These starts can be broken down as follows:
Unit D1 Unit D2 (a)
Surveillance Requirements 36 43 (b) Maintenance Activities 2
none (c) Actuel Demands 1*
1*
(SI Actuation during Unit 2 Cooldown)
- Fast Cold Starts l
l l
l 8401180111 840110 h
DR ADOCK 05000282
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NORTHERN OTATED POWER COMPANY Dir of NRR January 10, 1984 Page 2 i
It should be noted that the diesel generators have a small pump which circulates jacket coolant through an electric water heater and the engine cylinder liner jackets. A branch circuit supplies heated water at 100*F to the air cooler system to keep warm as an aid to quick starting.
Immediately prior to starting the diesels during all surveillance tests and maintenance activities, the diesels are prelubed for three (3)
'ninu t e s. The lube oil is kept heated to 140*F.
Please contact us if you have any questions related to the information ve have provided.
3 Cavid Musolf Manager - Nuclear Suppo Services DMM/miV/dtb c: Regional Administrator-III, NRC Resident Inspector, NRC NRR Project Manager, NRC G Charnoff
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