ML17207A327
| ML17207A327 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 08/24/1979 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7908310454 | |
| Download: ML17207A327 (6) | |
Text
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FLORIDA POWER 4 LIGHTCOMPANY August 24, 1979 L-79-235 Office of Nuclear Reactor Regulation Attention:
R.
W. Reid, Chief Operating Reactors Branch k'4 Division of Operating Reactors U, S, Nuclear Regulatory Commission Washington, D.C, 20555
Dear Nr,
Reid:
Re:
St, Lucie Unit 1
Docket No. 50-335 Fire Protection The attached information is submitted jn response to NRC concerns regarding fire door evaluations and ventilation system designs.
Very t
- yours, Robert E. Uhrj g Vice,President Advanced Systems 5 Technology REUfHAS/paf cc:
Nr, J.
P, O'Reilly, Region II Harold Reis, Esquire 908jg PEOPLE... SERVING PEOPLE
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RE-EVALUATION OF COMPARTMENT COMBUSTIBLE LOADINGS FOR ST. LUCIE UNIT NO.
1 SHUTDOWN RELATED FIRE AREAS Per your request and as supplement to our past responses on fire door ratings (SRP-24) and ventilation system design (questions 9, 17, 18, 19 and 20),
we have re-evaluated the compartment combustible loadings for shutdown related fire areas as provided in our Fire Protection Reevaluation report.
A, summary of these fire area combustible loadings is provided in the attached table.
All compartment fire areas with the exception of the diesel generator areas (areas 6 and 7), have very low fire loads.
As further noted by column three of the attached
- table, the predominant combustible in the non-diesel generator fire areas is typically paint coatings.
These extremely low fire loads are the result of St. Lucie Unit 1 design and plant operating philosophy, e.g.
non-combus-tible construction materials, cable fire protective coatings and disallowance of combustible materials storage in plant shutdown related areas.
Based on these extremely low fire loads in the non-diesel generator areas and the detailed design basis fire evaluations provided in the Fire Protection Reevaluation
- reports, upgrading or installation of fire doors and/or fire dampers, beyond those currently installed or commited to be installed, would not result in any additional benefit to nuclear safety or to the health and safety of the public.
Based on our evaluation of the diesel generator rooms we concur with providing, three hour fire rated protection between the diesel generator rooms by upgrading the existing door assembly or augmenting the current door assembly with a three hour fire rated barrier.
PSLl SHUTDOWN RELATED FIRE AREA COMPAR'AKNT COMBUSTIBLE LOADINGS WITH AND WITHOUT PAINT COATINGS FIRE AREA NO.
FIRE LOAD BTU/FT
"'FIRE LOAD WITHOUT, PLAINT BTU/FT 27 31 32 33 35 39 40 47 49 56 70 76*%
78 71,296 71,296 7,020 3,758 3,741 3,792 4, 921 4,569 10,126 4,010 16,200 4,420 4,383 1,334 59011 1,860 12,836 12,232 68 71,296 71,296 227 470 221 1-,=676 1,454 6,271 220 3'332 921 90 1,334 1,,474 1,860 8,720 8,318 Diesel Generators 1A and 1B are respectively located in areas 6 and 7.
+~ Charging pumps 1A, 1B and 1C are respectively located in areas 38,75 and 76.