Term
Cond Feed
Describe the signifigant levels in the hotwells. |
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Definition
Actual
-At +90" hi-hi alarm.
-At +33" hi alarm.
-Ref Zero at +26".
-At +19" low alarm.
-Actual bottom at 0".
Indicated
-0" is 26" actual.
-At +6" reject opens.
-At +3" make up opens.
-Has -15" to +15" range.
Recorder alarms
-At +7" high alarm.
-At -7" low alarm. |
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Term
Cond Feed
Describe the power supply to cond and feed pumps. |
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Definition
-11 cond pump bus 13.
-12 cond pump bus 14.
-11 RFP 11 bus.
-12 RFP 12 bus.
-Both have breaker control power of D111/D211. |
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Term
Cond Feed
Describe minimum flow requirements. |
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Definition
-Per pump.
-Cond pumps: 2500gpm.
-SJAE intercondensor: 3000gpm.
-RFP: 3300gpm. |
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Term
Cond Feed
Describe where cond pumps discharge to. |
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Definition
-Air ejector intercondensors (also to recombiners).
-Steam packing exhauster.
-Cond demin system to feed water heaters to RFP. |
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Term
Cond Feed
Describe the temperature of feed water to Rx. |
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Definition
| Heated up by heaters to roughly 380F. |
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Term
Cond Feed
Describe where cond pump min flow returns to. |
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Definition
| Recirc flow goes to HP condenser above the tubes. |
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Term
Cond Feed
Describe cond pump starting limits. |
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Definition
-2 starts allowed from ambient temp.
-1 start allowed from op temp.
-Motor assumed to have returned to normal temp after 60 minutes for idle or 30 minutes running. |
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Term
Cond Feed
Describe cond pump low flow protection. |
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Definition
| Shuts recirc and reject when header pressure is less than 230psig. |
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Term
Cond Feed
Describe cond pump recirc valve failure. |
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Definition
| Fail close on loss of air/power. |
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Term
Cond Feed
Describe what supplies hood spray. |
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Definition
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Term
Cond Feed
Describe the RFP starting/trips requirements and which are interlocks. |
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Definition
-11 pump trips on 70psig suction pressure for 10 sec.
-12 pump trips on 70psig suction pressure for 15 sec.
-Feed pumps trip at +48" Rx level.
-Motor fault.
-11 pump trips on 1200gpm low flow for 10 sec.
-12 pump trips on 1200gpm low flow for 15 sec.
-4 psig lube oil pressure (interlock).
-Feedwater shutoff valves in drywell open (interlock). |
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Term
Cond Feed
Describe where RFP min flow returns. |
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Definition
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Term
Cond Feed
Describe RFP recirc flow valve failure. |
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Definition
-Loss of Y-90 casue valves to close.
-Loss of Y-20 will not change position.
-Loss of air causes valves to fail open. |
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Term
Cond Feed
Describe RFP Aux oil pump. |
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Definition
-Used during s/u and s/d.
-Auto starts when shaft driven oil pump pressure is < or equal to 6psig or flow less or equal to 6 gpm.
-Must be manually secured. |
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Term
Cond Feed
Describe what cools the RFP oil cooler. |
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Definition
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Term
Cond Feed
Describe the feedwater heaters. |
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Definition
-2 strings.
-5 one half capacity heaters arranged with 3 low pressure heaters upstream of RFPs.
-Raise temp 280F above hotwell temp.
-Water passes through tubes and heated by turbine extraction steam.
-Cascaded to next lower pressure heater.
-Low pressure heaters drain to high pressure condenser.
-Dump valves and drain valves provided to maintain levels in each heater. |
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Term
Cond Feed
Describe dump and drain valve failure. |
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Definition
-Dump valves fail open on loss of air.
-Drain valves fail closed on loss of air. |
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Term
Cond Feed
Describe the spill valves. |
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Definition
-Spill valves on extraction lines interlocked to OPEN on turbine trip, high heater level, or inlet/outlet block valve closed.
-Fail open on loss of air/power. |
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Term
Cond Feed
Describe where steam packing exhauster drains and exhausts. |
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Definition
-Non condensables to 1 3/4 minute hold up line.
-Condensater to turbine building equipment drain sump. |
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