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When will the D air removal pump start
4.2 condenser A
4.8 condenser B
5.3 condenser C
Inches mercury vacuum
Hogging valve alarm
if hogging valve is open will alarm due to unmonitored release path
Suction valve interlock on pump start
permissive
vacuum breaker is closed permissive for the suction valve
can only open on less than 1.5 HGA DP
Pump starts; discharge valve opens when 1.5 HGA DP is met
Purpose of AR pumps
establishes vacuum on startup and will remove non condensable gasses from the condenser
How is the release of the AR pumps monitored?
what happens when setpoint is met?
what does this indicate ?
Monitored for radiation by RU 141, when radiation levels are high it will send flow through the filter. starts the post filter blower.
indicates early indication of a SG tube rupture.
How many stages is the AR pump compressor
2 stages
where do the AR pumps discharge normally
Normally through the vent stack
How does Gland seal steam interface with the AR system? what about PW
the Gland seal steam system should be in service prior to placing AR in service
PW MUST be in service prior to placing AR in service
how does the condensate service header interface with AR system
Condensate system provides seal water to the AR pumps
what happens when the Hi radiation is detected and the valves fail to actuate
the indicating light will not illuminate until the valves are in the correct position
