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21 Cards in this Set
- Front
- Back
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Automatic Main Feed Pump Trips |
1. Rx Trip 2. SI 3. Overspeed (107%) 4. IOPS (110%) 5. Thrust bearing wear 6. Low lube oil pressure (4# - 5 second time delay) 7. S/G water level Hi-Hi (P-14) 8. Low vacuum (20" Hg) 9. Low suction pressure (180# - 5 sec time delay) 10. Low trip header pressure (800#) |
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What flow rate do the MFP ELO's modulate to maintain? |
4,000 gpm |
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By design the MFW system can handle a ____% step change or ___%/minute ramp load change without steam dumps. |
10
5 |
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Feedwater isolation (FWI) closes what valves? Test Question - note if they provide a reactor trip only on one train. |
Feed reg. valves (either train) FRV - 210, 240 (A) FRV-220, 230 (B)
Feed motor op isolation valves (train specific) FMO-201, 204 (A) FRV-202, 203 (B) |
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What is the FW mass flow rate to each steam generator? |
3.55 million lbm/hr U1
3.7 million lbm/hr U2 |
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The high pressure heater strings provide how much flow? |
80% |
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The high pressure heater bypass (FMO-260) can handle how much flow? |
20% |
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What position will the ELO's go if the stop valves are open and the control switch is taken to closed? |
full open |
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The FW regulating valves are positioned by what other system?
What percent of steam flow are the FRVs placed in full service? |
Steam Generator Water Level Control
25% steam flow |
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The MFW pumps take suction from which two sources? |
Condensate System & Heater Drain Pumps |
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What inputs to the Feedwater Isolation (FWI) signal? Test Question |
1. SG water level HI HI (67%) - 2/3 on 1 SG. 2. SI 3. Rx. Trip with Low Tavg 545F (554F) - 2/4 loops |
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What will auto start the MFP seal water PP? |
Booster pump discharge vs. MFP suction pressure < 15 psid. |
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The MFP Seal Water FRVs regulate on what input? Test Question |
Temperature - maintains seal water leak off temp at 150F. |
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Per TS 3.7.3 4 MFIVs and 4 MFRVs are required during which modes of operation? |
1- 3 except when isolated. |
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The MFP discharge valves (FMO-251 & 252) close on what signal? |
Close on MFIV closure (MFP Trip) - they do not close on a FWI. |
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FRVs close on a loss of what? |
250 VDC and air |
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What impact to the MFPs will result from a loss of Circ Water? |
MFW Pumps will trip due to loss of vacuum. |
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What impact to the MFPs will result from a loss of Condensate? |
MFW pumps will trip due to loss of low suction pressure. |
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What impact to the MFPs will result from a loss of NESW? |
MFW pumps will trip due to loss of cooling to the LO system. |
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What is the source of steam to the MFP Turbines at 30% power? 70% power? Test Question |
30% - Main Steam 55 - 60% - Reheat Steam (preferred) |
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CRV-224 will auto open based on what input to the MFW Pumps? Test Question |
Low MFP suction PRESSURE at CPC-224, located past #4 heaters just before the MFW Pumps. |
