ML19210C576
| ML19210C576 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 10/29/1979 |
| From: | Stewart W FLORIDA POWER CORP. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-79-23, NUDOCS 7911190136 | |
| Download: ML19210C576 (3) | |
Text
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O oooo Florida Power C O A PO 9 A Y'u as October 29, 1979 File:
3-0-3-a-4 Mr. J.
P.
O'Reilly Director U. S. Nuclear Regulatory Commission Of fice of Inspection and Enf orcement Suite 3100 101 "arietta Street, N.W.
Atlanta, Georgia 30303 Sus Ject:
Crystal River l'ni t 3 Docket No. 50-302 Operating License No. DFR-72 I. E.
Bulletin 79-23 (POTENTIAL FAILURE OF EMERGENCY DIESEL GENERATOR FIELD EXCITER TRANSFORMER)
Dear Mr. O'Reilly:
Enclosed is our response to Items 1 and 2 of I.E.
Please contact this office if you have any questions concerning the enclosed responses.
Very truly yours, FLORIDA POWER CORPORATION n
Lc.e acco W.
P.
Stewart Manager, Nuclear Operations 354 175 Tibbs(IEBu179-23)D75 cc:
U. S.
Nuclear Regulatory Cocraission Of fice of Inspection and Enforcecent Division of Reactor Op< rations Inspection Washington, D. C.
20555 7911190 /3 6 g rf c f g 3 r
9 1
General Office 3:01 omt, :<um r/e scom. " o ca. ume 3: Fe:enwa r cmo 33 m. d u et M"M'I A 1. COI",
RESPONSE TO 1.E. BULLETIN 79 Item 1 1.
Determine whether or not connections have been made between low KVA rated transformers and high KVA rated EDCs without adequate limitations on the flow of circulating currents.
If applicable, provide a description of the corrective action being taken to address this problec.
RESPONSE
k'e have investigated the poten t ial problen. as desc ribed and confirmed, on applicable drawings and with the diesel generator supplier, Colt Industries, that the problen does not exist with our emergency diesel generators.
155i 176 Tibbs(IEBu179-23)D75
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RESPONSE TO 1.E. BULLETIN 79 Item 2 2.
Provide a schedule for the completion of a sustained full-load operation test of the EDGs for a duration of not less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, or provide the results of the similar long duration, full-load test which has already been completed on the EDGs installed at your facility.
The test should demonstrate full-load carrying capability for an interval of not less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, of which 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> should tv at a load equivalent to the continuous rating of the diesel generator and 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at a load equivalent to the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rating of the diesel generator.
The test should also verify that voltage and frequency requirements are maintained and that the cooling system functions within design limits.
RESPONSE
Enclosed is Florida Power Corporation's Surveillance Procedure 354, " EMERGENCY DIESEL FUEL OIL QUALITY AND DIESEL GENERATOR MONTilLY TEST", with the requested test results for Diesel Generator 3A (conducted 10-19-79 & 10-20-79) and Diesel Generator 3B (conducted 10-24-79 and 10-25-79.
The enclosed test results demonstrated the full-load carrying capability for an interval of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, of which 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> was at a
load equivalent to the continuous rating of the diesel generator (2750 KW) and 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at a load equivalent to the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rating of the diesel generator (3000 KW).
The test reaults also verified that the voltage and trequency requi re:nen ts were maintained and that the cooling system functiened within design limits.
I354 177 Tibbs(IEBu179-23)D75