Section 3.7.6 Condensate Storage and Supply Flashcards
3.7.6 Condensate Storage and Supply
The combined useable volume of the Condensate Storage Tank (CST) and Primary Makeup Storage Tank (T-81) shall be ≥ 100,000 gallons.
MODES 1, 2, and 3,
MODE 4 when steam generator is relied upon for heat removal.
3.7.6 Condensate Storage and Supply Action: Condensate volume not within limit.
3.7.6 Condensate Storage and Supply Action: Condensate volume not within limit.
Verify OPERABILITY of backup water supplies within 4 hours and Once per 12 hours thereafter
AND
Restore condensate volume to within limit in 7 days
Required Action and associated Completion Time not met.
Mode 3 in 6 hours
Mode 4 without reliance on steam generator for heat removal in 30 hours
Why is the preferred means of heat removal through a non-safety grade path?
- When the main steam isolation valves are open, the preferred means ofheat removal is to discharge steam to the condenser via the turbine bypass valve.
- This has the advantage of conserving condensate while minimizing releases to the environment.
What is the makeup/heat removal supply credited in tornado analysis?
Service Water System
Fire Water System
They are “underground”
What supply is credited in earthquake analysis?
CST is a principal component in removing residual heat from the PCS, it is designed to withstand earthquakes
The quantity calculated is base upon what?
The analysis assumption is generally 30 minutes at MODE 3, steaming through the MSSVs followed by a cooldown to Shutdown Cooling (SDC) entry conditions at the design cooldown rate.
CST and T-81 must contain sufficient cooling water to remove decay heat for 8 hours following a reactor trip from 2580.6 MWth.
Define operability of the backup water supplies?
OPERABILITY of the backup feedwater supplies must include verification
of the OPERABILITY of flow paths from the Fire Water System and SWS
to the AFW pumps, and availability of the water in the backup supplies.
