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13 Cards in this Set
- Front
- Back
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MSRs Purpose
Mechanically remove the entrained moisture from the HP turbine exhaust steam Reheat the dried steam to a temp near the initial steam temp before passing the steam onto the ____. Drying and reheating minimizes erosion of the LP turbine blading due to excessive steam wetness sustaining the efficiency of the LP turbines. |
LP turbines
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Mechanically remove the moisture from the HP turbine exhaust steam to preclude water impingement of the LP turbine.
Located at the _____(bottom) of the shell side Removes moisture by forcing steam over tortuous path |
Moisture Seperator
Inlet |
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Shell and finned u-tube heat exchanger
Located in the upper portion of MSR Reheat the dried steam to a temperature near its original temperature to raise overall plant efficiency. Uses ____ as heating source |
Reheaters Purpose
Main Steam |
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Piping from the HP turbine to the MSR
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Cold Reheat System
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Piping from the MSR to the LP turbine
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Hot Reheat System
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steam from MSL used to heat HP turbine exhaust steam
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Heating Steam
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Reheater Drain Receiver Tank
Normal level control to 1st Pt Heater Controlled by Foxboro controller Light indication only in MCR Closes on High Level in 1st Pt. Htr |
DSR-LV65A(B)
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Reheater Drain Receiver Tank
No automatic function Controlled from MCR |
DSR-MOV70A(B)
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Reheater Drain Receiver Tank
High level dump to condenser Controlled by Foxboro controller Light indication in MCR Modulates open at 6” above NWL Full open at 12” above NWL Opens via Test PB in MCR Opens with Turbine Load <20% and MSS-MOV111 & 112 open |
DSR-LV68A(B)
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Separator Drain Receiver Tank
Normal level control to 3rd Pt Heater Controlled by Foxboro controller Light indication only in MCR Closes on High Level in 3rd Pt. Htr |
DSM-LV75A(B
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Separator Drain Receiver Tank
No automatic function Controlled from MCR |
DSM-MOV80A(B)
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High Water Level Concerns
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-Potential backup of water to Main Turbine
-Turbine trips on MSR High Level (2 of 3 logic) 3” below bottom of MSR |
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Loss of heating steam to one MSR
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Uneven heating
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