ML19210D548
| ML19210D548 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 11/20/1979 |
| From: | Baynard P FLORIDA POWER CORP. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| 3--3-A-3, 3-0-3-A-3, NUDOCS 7911270278 | |
| Download: ML19210D548 (3) | |
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soo Florida Power C O R P O R A 7 IO N November 20, 1979 File:
3-0-3-a-3 Mr. Robert W. Reid Chief Operating Reactors Branch No. 4 Division of Operating Reactors U.S. Nuclear Regulatory Commission Washington, DC 20555
SUBJECT:
Crystal River Unit 3 Docket No. 50-302 Operating License No. DPR-72
Dear Mr. Reid:
On October 22, 1979, Florida Power Corporation received your letter dated October 17, 1979, requesting additional information concerning loss of Of fsite Power Events at Crystal River Unit 3.
Yo ur letter identified 5 Licensee Event Re po rts, dated November 28, 1977, January 4, July 10, and August 2 and 16, 1978, which indicated a loss of of fsite power had occurred at Crystal River Unit 3.
Enclosed, for your review, is our response to your letter, which clar-ifies that the five above-referenced events were actually sup port system failures and that, to-date, Crystal River Unit 3 has never experienced an actual loss of offsite power.
If you require any further discussion of our response, please contact us.
Very truly yours, lf )}} FLORIDA POWER CORPORATION Dr. P. Y. Baynard Manager Nuclear Support Services ECSekcT04(DN-88) ja 33733 e 813-866J15 ) General Office 320i Tnirty-fourtn street soutn. P O Box 14042. St Petersburg. F r 7 91127 U i
RESPONSE TO NRC REQUEST FOR ADDITIONAL INFOR!!ATION Crystal River Unit 3 has never experienced an actual Loss of Offsite Pcwer (all or partial) since commercial operation. Ihe events noted in your October 17, 1979, letter were actually failures of a support system for the of fsite circuit. Three (3) cases were due to a fail-ure of a sump pump in a cable tunnel, in which the control circuits for the 230 kV substation breakers pass through. The other two (2) cases were d ue to battery conditions of the Crystal River Unit 1
- battery, which supplies DC control power for the 230 kV substation breaker.
For all five (5) cases, the offsite circuit was never interrupted and the unit continued operation as normal. Therefore, the questions contained in the enclosure of your letter are not applicable to Crystal River Unit 3. 1396 253 ECSekcT04(DN-88)
a e STATE OF FLORIDA COUNTY OF PINELlAS Dr. P. Y. Baynard states that she is the Manager, Nuclear Support Se rvices, of Florida Power Corporation; that she is authorized on the part of said company to sign and file with the Nuclear Regulatory Commission the information attached hereto; and that all such statements made and raatters set forth therein are true a nd correct to the best of her knowledge, information, and belief. W& db8-U Uf. P. ' Y. Baynaru Subscribed and sworn to before me, a Notary Public in and for the State and County above named, this 20th day of November, 1979. ~ Notary Public Notary Public, State of Florida at Large, 6 254 My Commission Expires: August 8, 1983 CameronNotary 3(D12)}}