ML20148K499
| ML20148K499 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 03/28/1988 |
| From: | LOUISIANA POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20148K497 | List: |
| References | |
| NUDOCS 8803310173 | |
| Download: ML20148K499 (4) | |
Text
-
PLANT SYSTEMS BASES 3/4.7.4 ULTIMATE HEAT SINK of fans ensure that sufficient cooling capacity is availab accident conditions within acceptable liefts.(1) provide normal The limitations on minimum water level and maximum temperature are ba exceeding their design basis temperature and is cons ations of Regulatory Guide 1.27, "Ultimate Heat Sink for Nuclear Plants,"
March 1974.
3/4.7.5 FLOOD PROTECTION actions will be taken in the event of flood conditions.The limita 27.0 f t Mean Sea Level is based on the maximum elevation at provides protection, the nuclear plant island structure provides protection to safety related equipment up to elevation +30 ft Mean Sea Level.
3/4.7.6 CONTROL ROOM AIR CON 0!TIONING SYSTEM The OPERABILITY of the control room air conditioning system ensures that (1) the ambient air temperature does not exceed the allowable temperature for continuous duty rating for the equipment and instrumentation cooled by this system and (2) the control room will remain habitable for operations personnel during and following all credible accident conditions.
l The OPERABILITY of this system in conjunction with control room design provisions is based on limiting the radiation exposure to personnel occupying the control room to 5 i
ren or less whole body, or its equivalent.
l This limitation is consistent with the requirements of General Design Criterion 19 of Appendix A,10 CFR Part 50 Operation of the system with the heaters on for at least 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> contin-uous over a 31-day period is sufficient to reduce the buildup of noisture on the adsorbers and HEPA filters.
Obtaining and analyzing charcoal samples af ter 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of adsorber operation (since the last sample and analysis) analysis and is consistent with Regulatory Guide 1.52. ensures that t 3/4.7.7 CONTROLLEO VENTILATION AREA SYSTEM The OPERA 8ILITY of the controlled ventilation area system ensures that radioactive materials leaking from the penetration area or the ECCS equipment within the pump room following a LOCA are filtered prior to reaching the environment.
The operation of this system and the resultant effect on offsite dosage calculations was assumed in the safety analyses.
l l
WATERFORD - UNIT 3 8 3/4 7-4 8803310173 880328 PDR ADOCK 05000382 P
=-
?
l j
i l
ATTACIDENT B J
J d
I c
'I l
l l
PLANT SYSTEMS BASES 3/4.7.4 ULTIMATE HEAT SINK The liettations on the ultimate heat sink level, temperature, and number of fans ensure that sufficient cooling capacity is available to either (1) provide normal cooldown of the facility, or (2) to mitigate the effects of accident conditions within acceptable limits.
The liettations on einfeue water level and maxieue temperature are based on providing a 30-day cooling water supply to safety-related equipment without exceeding their design basis toeperature and is consistent with the recommend-4tions of Regulatory Guide 1.27. "Ultimate Heat Sink for Nuclear Plants,"
March 1974.
3/4.7.5 FL000 PROTECTION The Ifeitation on flood protection ensures that facility protective actions will be taken in the event of flood conditions.
The lieft of elevation 27.0 f t Mean Sea Level is based on the maxieue elevation at which the levee provides protection, the nuclear plant island structure provides protection to safety-related equipment up to elevation +30 ft Mean Sea Level.
3/4.7.6 CONTROL ROOM AIR CONDITIONING SYSTEM The OPERA 81LITY of the control room air conditioning system ensures that (1) the ambient air toeperature does not exceed the allowable toeperature for continuous duty rating for the equipment and instrumentation cooled by this systes and (2) the control room will remain habitable for operations personnel during and following all credible accident conditions.
The OPERA 8ILITY of this systee in conjunction with control room design provisions is based on limiting the radiation exposure to personnel occupying the control room to 5 ren or less whole body, or its equivalent.
This limitation is consistent with the requirements of General Design Criterion 19 of Appendix A,10 CFR Part 50.
Operation of the systae with the heaters on for at least 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> contin-uout over a 31-day period is sufficient to reduce the buildup of moisture on the adsorbers and HEPA filters.
Obtaining and analyzing charcoel saeples af ter 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of adsorber operation (since the last saeple and analysis) ensures that the adsorber maintains the efficiency assumed in the safety analysis and is consistant with Regulatory Guide 1.52.
3/4.7.7 CONTROLLED VENTILATION AREA SYSTEM The OPERA 81LITY of the controlled ventilation area system ensures that radioactive materials leaking from the penetration area or the ECCS equipment within the pump room following a LOCA are filtered prior to reaching the y@
environment.
The operation of this systee and the resultant effect on offsite dosage calculations was assumed in the safety analyses.
/
System design is such that a Control Roon Air Handlin Unit and Em ncy
' Filtra ion Unit in opposite trains can be cre i ed for sten o erab
/ In add tion, the function of the heating oil n ach C n rol oon Air andling
\\
conditionslowtqperatures]intheServiceSreasarenoconcer.ni ther fore,gency train is to provide personne comfort durin norna operat on Durin emer j
s the heaters provi e no safety function and are not required for system operability.,)
1C_ _ _
WATERFORO - UNIT 3 8 3/4 7-4 l