Liquid Rad Waste (WDS)

Question 1

What will auto close the Unit Release Valve (RRV-286/287)?

Answer 1

NO CW Pumps running in associated unit

Question 2

When do the aux building floor drains drain to?

Answer 2

• 609’ and above drains go to DWHUT.
• 587’ drains go to Dirty Sump Tank.
• 573’ drains go to Aux Sump.

Question 3

What is the Interlock for CWHUT and DWHUT inlet valves? (RRV-255/256)

Answer 3

Interlocked so that both cannot be closed at the same time (prevents backing up of drains)

Question 4

Which ONE of the following describes three sources of liquid waste to the Reactor Coolant Drain Tank?

A. Excess Letdown Heat Exchanger , Lower Containment Sump, Charging Line Suction Relief

B. RCS Loop Drains, Reactor Vessel Flange Leak Off, SI Accumulator Tank Drains

C. RCS Loop Drains, Pressurizer Relief Tank, Reactor Cavity Sump

D. RCP Thermal Barrier Relief, Excess Letdown/Seal Return Relief, Reactor Vessel Flange Leak Off

Answer 4

• B. RCS Loop Drains, Reactor Vessel Flange Leak Off, SI Accumulator Tank Drains

Question 5

What Drain sources tap into RCDT Outlet piping?

Answer 5

• RCP #3 Seal
• PRT

Question 6

What drains into the CWHUT?

Answer 6

Hard Piped equipment drains from the 609’ and above

Question 7

What 3 sumps are pumped out of containment? Where do they go?

Answer 7

All pump to DWHUT/CWHUT
- Lower Ctmnt Sump
- Reactor Cavity Sump
- Pipe Tunnel Sump

Question 8

Where do the Clean/Dirty Sump tanks overflow?

Answer 8

Aux Sump

Question 9

What drains into the Clean Sump Tank?

Answer 9

Hard Piped drains on the 587’

Question 10

Where do drains on the 573’ Elevation go?

Answer 10

Aux Sump

Question 11

Where does the RCDT receive drains from?

Answer 11

• Accumulator Drains
• XS LD Hx Drains
• Regen Hx Drains
• RCS Loop Drains
• RCP #2 Seal Leak off
• Rx Vessel Flange Leakoff
• Refueling Cavity