Term
RCIC
Describe the RCIC initiation. |
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Definition
-Initiated at low-low Rx water level (-47").
-Uses 1 out of 2 taken twice logic. |
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Term
RCIC
Describe the RCIC PCIS isolation signals and what is isolated. |
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Definition
-Group V isolation signals.
-60# in discharge header.
-44,434lbm/hr flow rate.
-187.5F area temp.
-Isolates the RCIC steam supply inboard (MO-2075) and outboard (MO-2076) valves.
-Trips the trip throttle valve (MO-2080). |
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Term
RCIC
Describe where RCIC steam is supplied from. |
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Definition
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Term
RCIC
Describe where RCIC water flow goes. |
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Definition
| To Rx through the A feed line. |
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Term
RCIC
Describe the RCIC design flow. |
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Definition
| Able to deliver design flow of 400gpm to Rx vessel within 30 seconds of initiation at pressure range of 165-1135#. |
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Term
RCIC
Describe the RCIC pump suction trips. |
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Definition
-70# high trip.
-15"HG low trip. |
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Term
RCIC
Describe the minimum flow valve operation. |
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Definition
-Air powered that fails open on loss of air/power.
-Two position switch operates.
-If in OPEN position then:
-Valve is open when <80gpm total flow.
-Valve is closed when >80gpm total flow.
-In AUTO position the valve is closed if there is:
-No ititation signal.
-Turbine steam supply (MO-2078) is closed.
-Turbine trip throttle valve (MO-2080) is not full open.
-And flow is > 40gpm. |
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Term
RCIC
Describe the RCIC pump suctions. |
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Definition
-Normally the CST.
-TORUS is alternate. |
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Term
RCIC
Describe the pump suction supply interlocks. |
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Definition
-If CST level reaches 2'8" then an open signal is given to the TORUS suction valves (MO-2101/2100).
-When TORUS suction valves are full open then a close signal is given to CST suction valve (MO-2102). |
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Term
RCIC
Describe the RCIC test line valve interlocks. |
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Definition
-If either TORUS suction valve (MO-2101/2100) is open then a closed signal is shut to the RCIC test return isolation valves (MO-2110/3502).
-This is done to prevent diverting water meant to go to the vessel to going back to the CSTs. |
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Term
RCIC
Describe the RCIC steam trap valve interlocks. |
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Definition
| -If the turbine steam supply valve (MO-2078) is open (opens on RCIC initiation signal) then the steam trap drains to the cond (CV-2082A/2082B) shut. |
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Term
RCIC
Describe when the RCIC water side injection valves open. |
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Definition
| -Inboard (MO-2107) and outboard (MO-2106) (both DC) open on RCIC initiation signal. |
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Term
RCIC
Describe the turbine trip throttle valve (MO-2080) trips. |
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Definition
-Exhaust pressure of 125# instantaneous.
-Exhaust pressure of 50# for 5 seconds.
-Pump suction of 15"Hg.
-Group V isolation.
-Manual trip.
-Overspeed of 5625 RPM requires manual reset. |
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Term
RCIC
Describe steam supply valve operation from Rx on initiation. |
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Definition
-Both inboard (MO-2075) and outboard (MO-2076) are normally open.
-Only the outboard gets an open signal on initiation.
-Inboard AC outboard DC. |
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Term
RCIC
Describe the turbine steam inlet valve (MO-2078) alarms. |
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Definition
| -If turbine steam inlet valve (MO-2078) is 25% (or greater) open for 15 seconds with flow < 40gpm then actuates an alarm. |
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Term
RCIC
Describe cond pump discharge path and interlocks. |
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Definition
-If stam supply inlet valve (MO-2078) is open then the discharge valves (CV-2849/2848) to CRW are shut.
-Cond pump discharge is then directed to the RCIC pump suction. |
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Term
RCIC
Describe where RCIC non-condensibles are discharged to. |
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Definition
-Discharged to the TORUS air space.
-This is an oxygen concern. |
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Term
RCIC
Describe where RCIC lube oil gets cooling. |
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Definition
| -16gpm is diverted from RCIC pump discharge to the lube oil cooler. |
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Term
RCIC
Describe RCIC exhaust overpressure protection. |
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Definition
-RCIC trip if 125# instantaneously or 50# for 5 seconds.
-Two rupture discs in parallel.
-Discs rupture at 150+/- 10# and discharge to RCIC room.
-Alarm at 5# to detect leakage past first rupture disc. |
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Term
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Definition
-5 stage single suction double volute pump.
-Flow of 416gpm.
-400gpm to Rx vessel.
-16gpm to lube oil HX and condenser.
-Discharge is at the center of the pump. |
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Term
RCIC
Describe the lube oil alarms. |
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Definition
-Low pressure at 4#.
-High temperature at 150F. |
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Term
RCIC
Describe RCIC flow and time to speed. |
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Definition
| Will deliver rated flow of 400gpm in 30seconds. |
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Term
RCIC
Describe RCIC flow control. |
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Definition
-Flow controller, ramp generator, and flow indication are powered by Y-70.
-Governor in standby is set to reach about 2000rpm.
-Trip throttle valve is normally open and steam supply valve is normally closed.
-Ramp generator starts when trip throttle valve and steam supply valves are not fully closed.
-If Y-70 is lost, RCIC will stay at minimum speed of 2150rpm. |
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Term
RCIC
Describe the turbine oil pump. |
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Definition
| Oil pump driven by turbine. |
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Term
RCIC
Describe the RCIC trips. |
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Definition
-Overspeed of 5625rpm: trips TTV.
-Exh press of 125# or 50# for 5 seconds: trips TTV.
-Low pump suction of 15"Hg: trips TTV.
-Group V isolation: trips TTV.
-Manual: trips TTB.
-Rx high water level +48": trips SSV.
-SSV = steam supply valve to turbine. |
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Term
RCIC
Describe affect on RCIC at +48". |
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Definition
-Steam supply to turbine (MO-2078) and lube oil cooling supply (MO-2096) close.
-Cond pump discharge to CRW valves (CV-2848/2849)open.
-Resets at -47" and opposite happens. |
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Term
RCIC
Describe what happens on RCIC initiation. |
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Definition
-Outboard steam isolation (MO-2076) opens.
-CST suction (MO-2102) opens.
-Cooling water to condenser and lube oil (MO-2096) opens.
-Steam supply to turbine (MO-2078) opens.
-Steam supply to turbine (MO-2078) and TTV (MO-2080) not being full shut starts ramp generator.
-Steam supply to turbine (MO-2078) open causes steam trap drains (CV-2082A/2082B) to shut.
-Test return to CST (MO-2110/3502) shut.
-Vacuum pump starts.
-Steam supply to turbine (MO-2078) open causes cond pump disch to RW valves (CV-2848/2849) to shut and align discharge to RCIC pump suction.
-Min flow valve (MO-2104) opens.
-Injection to A feed valves (MO-2106/2107) open. |
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Term
RCIC
Describe where low low water level signal comes from for RCIC. |
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Definition
| Core spray relay contacts. |
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Term
RCIC
Describe RCIC logic power and affects of losses. |
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Definition
-Powered by Div I and II.
-Loss of Div I causes loss of:
-Remote tripping of RCIC.
-Auto initiation.
-High water trip.
-Loss of Div II causes loss of:
-High water trip. |
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Term
RCIC
Describe power to RCIC AOPs. |
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Definition
-125Vdc and Instrument air.
-Loss of air causes all AOPs to fail closed, except minimum flow line valve (CV-2104). |
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Term
RCIC
Describe RCIC valve power supplies. |
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Definition
| -All valves are DC by D311, except the inboard steam isolation (MO-2075) for containment. |
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Term
RCIC
Describe power supplies for the cond pump and vacuum pump. |
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Definition
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Term
RCIC
Describe pressure/level control concerns for RCIC. |
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Definition
| Cannot perform pressure/level control when suction is aligned to the TORUS. |
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