L-81-484, Discusses re-exam of Stretch Power Application Re Sections 7.2.3 Loss of All Non-Emergency AC Power Event, & 7.3.4, Seized Rotor Event, Per Request
| ML17212B011 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 11/18/1981 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| L-81-484, NUDOCS 8111230363 | |
| Download: ML17212B011 (4) | |
Text
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ACCESSION( NBR':8111230363(
DOC ~ DAiTEi: 81/11/18 NOTARIZED': NO FACILi:50: 335 St ~ Lucie' Iant< Unit 1~. Florida>> Power 8 Ltigpti Cb;:-
AUTtHIe NAi41KI AUTHOR AFFILI'ATKON UHRI G., R, Et, Floriida>> Power L Lighit C'o ~
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SUBJECT:
- Discusses re}.exam of stretchI power i applhcation>> reI Sebtiions 7e2,3 "Loss of Al l Non>> Emei gjency ac Power EVentr,"'
7'3'4r "S'eized Rotor Event'r,"
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P.o. BOX 529100 MIAMI,F L33152 Ji'ee~~4 FLORIDAPOWER 84 LIGHTCOMPANY November 18, 1981 L-81-484 Office of Nuclear Reactor Regulation Attention:
Mr. Darrell G. Eisenhut, Division of Licensing U.S.
Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Ei senhut:
Re:
St.
Lucie Unit I Docket No.
50-335 Stretch Power A
lication In the course of the review of our Stretch Power Application the NRC staff has requested that two previously analyzed events be reevaluated by Florida Power 8 Light to -include the assump-tion o'f the following additional failure mechanisms:
I)
- 7.2.3 Loss of All Non-Emergency A-C Power Event; additional assumption required
- worst single active failure for this event.
2)
- 7.3.4 Seized Rotor Event; additional assumptions r equi red - loss of offsi te power and worst single active failure for this event.
(* numbering system used in Stretch Power Application)
Based on a reexamination of the analyses already submitted for Stretch Power it is FPLs position that the results on an ana-
. lysis of these postulated events that assumes the additional failure mechanisms discussed above will continue to satisfy the acceptance criteria.
- However, we will reevaluate the seized Rotor and Loss of All Non-Emergency A-C Power events with these additional assumptions to confirm this position and submit the results within 6 months of the NRC approval of the Stretch Power Application.
Very truly yours, Robert E. Uhrig Vice President Advanced Systems and Technology REU/DME/ah poiS It.
cc:
Mr. J.P.
O'Reilly, Region II Harold F. Reis, Esquire Siii230363 8iiiji8 PDR ADOCK OS00033Si P
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