202.32 RCB Chilled Water

Question 1

• 202.32 RCB Chilled Water*
• • *

Function of RCB Chilled Water

Answer 1

Provide chilled water to the RCFCs under normal conditions and the RCS Vacuum Degassing System (cools compressor)

• 50% CAPACITY PUMPS & CHILLERS*
• (2 NORMALLY RUN)*
• HEAT IS REJECTED TO THE OL-ACW SYSTEM*

Question 2

• 202.32 RCB Chilled Water*
• • *

Location of pumps, chillers, expansion tank

Answer 2

RCB CHILLERS - 29’TGB

CHILLED WTR PUMPS - 10’ MAB

EXPANSION TANK - 60’MAB

Question 3

• 202.32 RCB Chilled Water*
• • *

Makeup source to RCB Chilled Water Expansion Tank

Answer 3

Automatic makeup from demin water

Question 4

• 202.32 RCB Chilled Water*
• • *

Behavior of RCB Chilled Water and CCW CIVs

Answer 4

RCFC CHILLED WATER CONTAINMENT ISOLATION VALVES

Normal Open/Close features. In Auto valves close on SI & LOOP.

RCFC CCW CONTAINMENT ISOLATION VALVES

Normal Open/Close features except that valves won’t open unless Chilled Water valves are closed. In Auto, CCW valves open on an SI, but remain closed on a LOOP.

B Train valves have power lockout function due to location in RCB vulnerable to being underwater post-accident

Question 5

• 202.32 RCB Chilled Water*
• • *

Power supplies

Answer 5

RCB Chiller 11A - 4.16 KV SWGR 1D1

RCB Chiller 11B - 4.16 KV SWGR 1D2

RCB Chiller 11C - 4.16 KV SWGR 1D2

RCB Chill Water Pump 11A - 480V LC-1J

RCB Chill Water Pump 11B - 480V LC-1K

RCB Chill Water Pump 11C - 480V LC-1L2

Question 6

• 202.32 RCB Chilled Water*
• • *

Normal Pump Configuration

Answer 6

One pump per chiller is normal.

Balanced for 2 pump operation with 2 trains of RCFCs in service

A pump in AUTO will start if running pump trips.

• Too many RCFCs lined up for pumps running could cause runout*
• Too few chillers could lift relief*