WASTE DISPOSAL - GASEOUS Flashcards
(18 cards)
Gas release may be secured for how long if the tank is isolated with no inputs and SM permission?
Up to 12 hours without needing a new permit. Permit allows up to 48 hours before starting.
What action should be taken if tank pressure decreases during a release other than the tank being released?
Terminate the gas release.
What must be done when venting MU-T-1 via MU-V-13?
Manually start WDG-P-1A or B in HAND.
What happens if VBD is lost and RM-A-7 loses power?
Verify WDG-V-47 AUTO closes, place RM-A-7 in DEFEAT, and resume release if RM-A-8 is OPERABLE.
What are indications of a lifting relief valve?
Unexpected loss of decay tank pressure and RM-A-8 counts/alarm.
What happens if WDG-P-1A/B is started manually and trips?
The standby compressor starts and will NOT unload, requiring manual securing.
At what pressures do the header N2 supply valves operate?
0.7# N2 supply OPENS, 0.9# N2 supply CLOSES, 1.4# decreasing trips WDG-P-1A/B, 1.6# starts WDG-P-1A, 1.8# starts WDG-P-1B.
What must be OPEN to start the waste gas compressor?
NS-V-32 must be OPEN.
What is the function of the separator tank in the waste gas system?
Maintained at 50# for seal water circulation and cooling through the compressor.
What happens in the decay tank sequencer when the inlet valve closes at 80#?
The next tank in the sequence (A-B-C-A) is selected if the new tank is <80# and both outlets are CLOSED. Reliefs open in 8 minutes.
What protection do loop seals provide?
Overpressure protection at 8.5# (RCBTs/MWST) and vacuum protection at 3.25 psia.
How often are grab samples required if Beckman monitors are OOS?
Every 24 hours if 1 Beckman is OOS, every 4 hours during degas if 2 Beckmans are OOS.
What conditions terminate a gas release?
WDG-V-47 CLOSES on RM-A-7 High, RM-A-8 High, FR-123 High Release Rate, or AH-E-14A/B/C/D NOT running.
What happens to WDG-V-3/4 during specific conditions?
CLOSE on 4# ES, RTI, or RM-G-20 High.
What is the decay tank curie limit to ensure offsite dose remains below 0.5 Rem total body?
≤8,800 Curies.
What is the oxygen limit in the decay tank if hydrogen is ≥4%?
O2 must be ≤2%, or suspend additions immediately.
What are the release requirements for RM-A-7 and FT-123?
Both must be OPERABLE. If not, WDG-V-47 CLOSES (terminated), or RM-A-8 + FT-149 + FT-150 must be OPERABLE (release continues).
What must be done if a waste gas compressor is started manually?
The compressor must be STOPPED manually. Suction valves are interlocked to auto-open.
