Condensate Flashcards
Unit 1 is operating at rated power. CDNP01B suction is lined up to hotwell 2C (CDN-HV-1 is open, CDN-HV-2 is closed) Valve Services wants to manually stroke the hotwell 2C suction valve (CDN-HV-1) to CDN-P01B several turns off its open seat to support testing. Based on these conditions, which one of the following is true?
A. This action will result in a trip of CDN-P01B.
B. No problem, as long as the suction valve to CDN-P01C is open.
C. No problem, as long as the suction valve (CDN-HV-1) is not fully closed.
D. This action could cause the mini-flow valve to open, reducing MFP suction pressure.
Answer: A
The plant is at 100% power. Level in hotwell 1C is 29 inches and lowering. Level is hotwell 2C is 35 inches and lowering. Both suction valves HV-1 and HV-2 for the condensate pump “B” are open. Which one of the following describes the effect on the condensate system?
A. All three condensate pumps will trip immediately.
B. Only two condensate pumps will trip immediately.
C. Only one condensate pump will trip after a 30 second time delay.
D. All three condensate pumps will trip after a 30 second time delay.
Answer: B
The controller for the Condensate Polishing Demineralizer Bypass Valve (CDN-PDIC-195) is in MANUAL with a zero output. This arrangement:
A. fully opens the bypass valve.
B. fully closes the bypass valve.
C. sets up flow through both the bypass line and the demineralizers.
D. permits the bypass valve to position itself based on D/P across the demineralizers.
Answer: A
Unit 1 is operating at rated power at 200 EFPD. A condenser tube rupture occurs. The four available condensate demineralizers have been placed in service. CDN-PDV-195 is still open. SG Sodium, based on the inline monitor, indicates 800 ppb and rising rapidly. Based on these conditions, the operations crew should:
A. conduct a controlled downpower.
B. initiate a manual RPCB (LOFP).
C. trip the reactor and enter standard post trip actions.
D. take manual control of the controller in order to close CDN-PDV-195.
Answer: C
Which ONE of the following will result in a Main Condensate Pump Trip?
A. High discharge pressure.
B. High pump vibration.
C. Low flow.
D. High water level in the hotwell.
Answer: C
Which one of the following describes how the condensate pump mini-flow valve fails? The mini-flow valve fails _______ on a loss of air and ______ on a loss of power.
A. close; open
B. open; close
C. open; open
D. close; close
Answer: C
Which one of the following indicates why we would direct an Auxiliary Operator to open the hotwell makeup valves from the CST, CDN-HV-154 and 155, when hotwell makeup is insufficient?
A. To allow the level in the hotwell and CST to equalize.
B. If steaming to the atmosphere, hotwell level may decrease to 30 inches or less, which will cause a condensate pump to trip.
C. To minimize cross-contamination of the hotwell and the CST.
D. To prevent drawing a vacuum on the CST while making up to the hotwell.
Answer: B
Unit 1 is operating at rated power. The air line to CDN-P01A mini-flow valve actuator separates from the valve. Based on these conditions, the operator can expect:
A. feed pump suction pressure to drop.
B. no impact.
C. CDN-P01A to trip.
D. hotwell level to drop.
Answer: A
Which one of the following will a Non-Licensed Operator be expected to check after 40AO-9ZZ07, Loss of Condenser Vacuum, has been entered?
A. SBCV 1007 & 1008 operation
B. Main Feed Pump operation
C. Seal Oil Vacuum Tank level
D. Air Removal Pump operation
Answer: D
The Condensate System is in operation with Condensate Pumps operating. Five (5) Condensate Demineralizers are in service (full flow). The Condensate Demineralizer Inlet Valve (CDN-UV-191) starts to close due to a motor failure. Based on these conditions, you should expect…
A. the MFPs to trip on low suction pressure.
B. no automatic actions to occur.
C. the Condensate Demin Bypass Valve to open.
D. the Condensate pump mini-flow valves open.
Answer: C
A condenser tube rupture exists in Train “A” of the main condenser. The control room has directed an auxiliary operator to close the inlet isolation valve for Drawoff to the CST . This action by the auxiliary operator will…
A. isolate the make-up function from the condensate storage tank to the condenser hotwells.
B. slow the rate at which condenser hotwell levels are increasing.
C. prevent contamination of the condensate storage tank by isolating hotwell draw off.
D. prevent condensate pump LO-LO level trips after the circ water overboard valves are opened.
Answer: C
ALL of the following will trip “B” Condensate Pump EXCEPT…
A. low-low hotwell level.
B. low flow.
C. high discharge pressure.
D. NBN-S01 bus undervoltage.
Answer: C
The Condensate System is in operation with Condensate Pumps operating. Condensate Demineralizer Differential Pressure is reading 58 psid. Which ONE of the following describes the impact on the Condensate Demineralizers?
A. The Outlet Valve closes, the Bypass & Inlet Valves are open.
B. The Inlet Valve closes, the Bypass & Outlet Valves are open.
C. The Bypass Valve opens, the Inlet & Outlet Valves are open.
D. The Bypass Valve closes, the Inlet & Outlet Valves are open.
Answer: C
The plant is operating at 100% power. A large load reject occurs due to degraded vacuum in the condenser. Hotwell level is 35 inches and holding steady. Which one of the following actions will need to be performed?
A. Open at least one Main Feed Pump Mini-flow Valve.
B. Trip the Reactor.
C. Trip the Main Turbine.
D. Open the Hotwell Manual Makeup Isolation Valve(s).
Answer: D
