201.05 RCPs

Question 1

• 201.05 RCPs*
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Functions of RCPs

Answer 1

Circulate water through the Rx Vessel and to the S/Gs to transfer heat

KNOW THE FLOW PATH SG/RCP/RX VSL

Flow must be sufficient to remove adequate amounts of heat – 3853 MWth

Question 2

• 201.05 RCPs*
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Function of Hydraulic Section of RCP

Answer 2

Imparts velocity / pressure to coolant

Limits heat flow to motor internals

Question 3

• 201.05 RCPs*
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Function of Seal Section of RCP

Answer 3

Prevents RCS leakage

Question 4

• 201.05 RCPs*
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Function of Motor Section of RCP

Answer 4

Converts electrical energy to rotational energy to spin impeller

Question 5

• 201.05 RCPs*
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RCS flow path through RCP

Answer 5

Flow drawn up through impeller, out passages in diffuser to discharge

Question 6

• 201.05 RCPs*
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Normal Flow through RCP Seals

Answer 6

CVCS seal injection enters between Seal #1 and the Lower Pump Radial Bearing and splits off to flow both down into the RCS through the thermal barrier and up through Seal #1

Leakoff from Seal #1 mostly returns to CVCS at the Charging Pump suction or to the VCT

A small amount of Seal #1 leakoff flows up through Seal #2 and goes to the RCDT

Seal #3 is supplied with a small amount of flow from the RCP standpipe, which splits off to join the Seal #2 leakoff to the RCDT and flow up, where it is directed to the Normal Sump