ML18227B019
| ML18227B019 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 12/09/1976 |
| From: | Adomat E, Robert E. Uhrig Florida Power & Light Co |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| L-76-419 | |
| Download: ML18227B019 (4) | |
Text
NRQ FOAM 195
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U.S. WUCI.FAA AEOULaTOAv coMMISsIoN DOCIiET NUMII-59-?5 NRC DISTRIBUTION FoR I
T 50 DOC I(ET MATERIAL FILE NUMBER hlr. Vi'ctor Stello FROM:
Florida Power
& I.igl3t Company Miami, Florida Ilr. Robert E. Uhrig Dais OF DOCUMENT 12/9/76 DaTE RECEIVED 1,2/9/76
%LETTER
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PROP INPUT FOAM ENCLOSURE NUMBER OF COPIES RECEIVED Three signed 35 copies encl recvd.
Ltr. w/attached errata sheet....re our 6/17/76 and 12/3/76 orders;.. trans the following:
DO jqoT REMOVE
~ACKNOWEDGED PLANT NAME:
Turkey Point Vnits 3 & /I (3-P)
Concerns re-evalua tion o f ECCS cooling performance calculated in accordance with an approved Nestinghouse Evaluation Model, with appropriate corrections for upper head water temperature.
(60-P)
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Office of Nuclear Reactor Regulation Attention:
Mr. Victor Stello, Director Division of Operating Reactors U.
S. Nuclear Regulatory Commission Nashington, D. C.
20555 ReggQtQ'Qf DockBt, Fl!8
Dear Mr. Stello:
I Re:
Turkey Point Units 3
6 4
Docket Nos.
50-250 and 50-251 ECCS Re-evaluation P 0 BOX 013100 MIAMI FL 33101
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FLORIDA I OWER & LiGHT COY>PANY December 9, l976 r.-76-419 g
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Xn accordance with the June 17, 1976 and December 3,
1976 Orders for Modification of License issued by the Commission for Turkey Point Unit, 4, Florida Power a Light Company hereby submits a
re-evaluation of ECCS cooling performance calculated in accordance with an approved Nestinghouse Evaluation Model, with appxopriate corrections for upper head water temperature-The re-evaluation also includes the effects of (1) plugged steam generator tubes and (2), modifications to increase the water volume of the Safety injection accumulators.
The re-evaluation was performed using a rated power level of 2192 Mwt instead of the actual Technical Specification rated power level of 2200 Mwt.
Nestinghouse Electric Corporation is now revising their calcula-tions using 2200 Mwt and, when this is complete, change pages will be forwarded to you to bring the ECCS re-evaluation up to date.
<<The ECCS re-evaluation assumes a minimum accumulator water volume of 875 cubic feet;
- however, the actual minimum water volume for the x'emainder of core cycle 3 for Unit 4 will be 825 cubic feet.
Modifications to increase the Unit 4 accumulator volume.are planned for the Spring 1977 refueling outage.
Modifications to increase the Unit 3 accumulator volume will be completed during the Pall 1976 refueling outage which is now in progress.
Core Cycle 3 parameters were used in the ECCS re-evaluat'on.
Nestinghouse Electric Corporation then compared Cycle 4
operation with Cycle 3 operation and concluded that Cycle 3 is j sm ft)43 PEOPI.E... SEfIVING PFOPLE
Office of Nuclear'eactor Regulation
.. ~Attention:
Mr. Victor Stello, Director Page Two
,~
more limiting than Cycle 4 with respect to ECCS, performance.
The comparison included consideration of the three Region 3
assemblies which will be reloaded into Unit 4 for Cycle 4
operation.
Proposed Technical Specification amendments incorporating the results of the ECCS re-evaluation will be submitted under separate cover letters.
Very tru
- urs, Robert E. Uhrig Vice President REU/MAS/cpc Attachment cc:
Mr. Norman C. Moseley Robert Lowenstein, Esquire