L-83-280, Advises That 10-yr pressure-temp Operating Limits (P-T) for Plant Recovery Program Reactor Vessel Internals & Thermal Shield Valid for Upcoming Cycle 6.P-T Limits Will Be Reviewed & Revised,If Necessary,Prior to Exceeding 7.4 EFPY
| ML17213B344 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 05/03/1983 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Clark R Office of Nuclear Reactor Regulation |
| References | |
| L-83-280, NUDOCS 8305090476 | |
| Download: ML17213B344 (3) | |
Text
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g4 REGULAT INFORMATION DISTR IBUTIO
!'STEM (RIDS)
ACCESSION NBR:6305090076
-DOC,DATE: S3/05/03 NOTARIZED; NO
,FAOIL:50-335 St, Lucie Planti Uni!t 1~
F lor ida Power L Light Co, AUTH ~ NAME AUTHOR AFFILIATION UHRIGiReEe Flor ida Power L l.ight Co, RECIP,NAME RECIPIENT AFFILIATION CLARKiR,AD Operating Reactor s Br anch DOCKET 05000335
SUBJECT:
Advises !that 10"yr pressure-temp operating limits (P.T) for plant recovery program reactor vessel internals 8 !thermal shield valid for upcoming Cycle 6 '
T limits will be reviewed L revised~if necessaryiprior to iexceeding 7 '
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P. O. Box 14000, JUNO BEACH, FL 33408 FLORIDAPOWER 5 LIGHTCOMPANY May 3, I 983 L-83-280 Office of Nuclear Reactor Regulation Attention:
Mr. Robert A. Clark, Chief Operating Reactors Branch kt3 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C. 20555
Dear Mr. Clark:
Re:
St. Lucie Unit I
Docket No. 50-335 Reactor Vessel Internals and Thermal Shield; Plant Recover Pro ram(Pressure - Tem erature 0 eratin Limits)
Ref:
(I) Florida Power & Light letter of April 27, l983 (L-83-263)
Dear. Mr. Clark:
Florida Power & Light Company has reviewed the pressure-temperature (P-T) limits in the technical specifications as a
result of thermal shield removal.
It has been determined that the IO-year P-T limit (Tech Spec page 3/4 4-23b, Amendment No. 28), is valid for the upcoming Cycle 6.
Analysis using fluence rates of CEN-I 89 and methodology of Regulatory Guide l.99, has shown that several discrete combinations of pressure and temperature are consistent with Page 3/4 4-23b of the technical specifications.
Furthermore, as indicated at the April 25) l983, meeting with the NRC, Reference (I), the v'essel fluence rate was increased by a factor of l.75 as a result of removing the thermal shield.
With'his increased rate of fluence, the P-T limit presently in the technical specifications (Page 3/4 4-23b),
is valid for 7.4 EFPY; rather than IO EFPY.
Since St.
Lucie I
has accumulated about 4.6 EFPY to date, Page 3/4 4-23(b) remains valid for the forthcoming Cycle 6.
As results of the surveillance capsule program become available, including updated fluence calculations, the St. Lucie I P-T limits will be reviewed and revised, if necessary, prior to exceeding 7.4 EFPY.
~
If you have any questions on the above, please call at your earliest convenience.
Very truly yours, Robert E. Uhrig Vice President "Advanced Systems & Technology REU/DAC/cab cc: Harold Reis, Esquire 8305090476 830503 PDR ADOCK 05000335 P.;
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