What is one function of the moisture separator reheaters?
minimize erosion damage to the LP turbines
What statement describes the operation of the moisture separator reheater startup (pocket) drain valves (3DSM-MOV32A/B)?
MOV32A and B will automatically OPEN anytime the main turbine is tripped
The steam supply valves to the MSR reheater tube sections are operated simultaneously at all power levels to prevent:
rotor rubbing in the LP turbines
Where are the reheater drains tanks (DSR) outputs directed to during normal operation at 100% power?
shell side of the 1st point feed heaters
Reheat steam to the MSRs is automatically adjusted based on turbine power.
What parameter is utilized for the turbine power input?
cross around pressure
What statement accurately describes the function of the moisture separators?
the moisture separators convert the low pressure saturated steam exhausted from the HP turbine into low pressure superheated steam for use by the LP main turbines and turbine driven main feedwater pumps
Removing reheat steam to both MSRs will result in:
increased moisture content of the steam going to the LP turbines (prolonged operation can lead to LP turbine blade damage)
How is moisture separator drain tank level normally maintained while at 100% power?
the normal level control valve LV20A1 modulates to send water to the condensate system downstream of the 2nd point feedwater heaters, maintaining DSM tank level at 50%. IF level increases to 75%, the emergency drain valve LV20A2 starts to modulate open to control level, sending water to the main condenser
