Term
RWCU
Describe teh normal flow path for RWCU. |
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Definition
-Suction from B recirc line and RPV head drain.
-Passes thru 2 PCIVs then thru 3 regen and 2 non-regen HXs.
-Thru 1 of 2 pumps.
-Thru both demins.
-Then back thru the 2 regen HXs.
-Thru a non PCIV and out to the A and B FW lines via RCIC and HPCI injection lines. |
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Term
RWCU
Describe the heat reject mode. |
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Definition
| Bypasses tube side for regen HX for max heat removal. |
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Term
RWCU
Describe the Hx bypass mode. |
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Definition
| Bypassess all HXs, conserving NPSH. |
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Term
RWCU
Describe what will give a group 3 isolation. |
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Definition
-Low low level.
-High DW press.
-Flow >462/-200 for 10 sec.
-Area temp >170F. |
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Term
RWCU
Describe the pumps rated flow and power supplies. |
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Definition
-Rated at 160gpm.
-Powered by MCC-132/122. |
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Term
RWCU
Describe what will cause the pumps to trip. |
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Definition
-Suctions not full open.
-Discharge full closed and <40gpm dump flow.
-Loss of indication to suction valve.
-High inlet temp to demins >140F. |
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Term
RWCU
Describe resin breakthrough indications. |
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Definition
-High conductivity in Rx.
-Low pH in Rx water.
-Increase Rx water sulfates.
-Slight decrease in power.
-D/P of filter may drop.
-D/P of filter strainer may increase. |
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Term
RWCU
Describe the reject/dump flow control isolations. |
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Definition
-140psig downstream of CV-2403.
-5psig upstream of CV-2403. |
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Term
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Definition
-Goes to hotwell, waste collector or waste surge.
-Limit reject flow to 79gmp to protect non-regen. |
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Term
RWCU
Describe the High/High inlet temp setpoint and what happens. |
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Definition
-140F.
-Shuts discharge valves and trips teh pumps. |
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Term
RWCU
Describe the low/high alarm setpoint and what happens. |
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Definition
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Term
RWCU
Describe when the filter is manually removed. |
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Definition
-25#dp.
-Hi strainer d/p at 5#.
-Hi effluent cond .1umho/cm. |
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Term
RWCU
Describe when the filter automatically goes to hold. |
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Definition
-Low flow 35gpm.
-Hi filter d/p 30#.
-Hi strainer d/p 10#.
-Holding pumps start 35gpm. |
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Term
RWCU
Describe the effects on RWCU on a loss of Y-10. |
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Definition
-MO-2399 and CV-2404/2405 close on loss of temp monitoring.
-Pumps trip. |
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Term
RWCU
Describe the effects on RWCU on a loss of Y-70. |
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Definition
-MO-2397 (1st suction) closes due to valve control relay in PCIS de-energizing.
-Pumps trip. |
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Term
| Describe the effects on RWCU on a loss of Y-80. |
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Definition
-Closes MO-2398,2399 due to valve control relay in PCIS de-energizing.
-Pumps trip. |
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