Liquid Rad Waste (WDS) Flashcards Preview

2. RO32 Systems > Liquid Rad Waste (WDS) > Flashcards

Flashcards in Liquid Rad Waste (WDS) Deck (13)
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1
Q

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

A
  • NO CW Pumps running in associated unit

- Both Fail Closed

2
Q

When would RRV-285, liquid release valve, trip closed?

A
  • RRS-1001 Hi Rad
  • RRS-1000 Failure
  • High; Low Rad Monitor Sample Flow
    (RFS-1010, RFS-1011)
  • Fails Closed **
3
Q

When would the monitor tank pump trip when the selector switch is in release?

A
  • RRS-1001 Hi Rad
  • RRS-1000 Failure
  • High; Low Rad Monitor Sample Flow
    (RFS-1010, RFS-1011)
  • Low MT Lvl
4
Q

When do the aux building floor drains drain to?

A
  • 609’ and above drains go to DWHUT.
  • 587’ drains go to DST.
  • 573’ drains go to Aux Sump.
5
Q

Which ONE of the following lists the two conditions that will independently cause automatic closure of Liquid Waste Disposal Effluent Discharge Header Shutoff Valve, 12-RRV-285?

A. Low circulating water flow High radiation sensed in the release header

B. Low circulating water flow High radiation sensed in the circulating water flow

C. Low release header radiation monitor sample flow High radiation sensed in the release header

D. High release header radiation monitor sample flow High radiation sensed in the circulating water flow

A
  • C. Low release header radiation monitor sample flow High radiation sensed in the release header
6
Q

What is the purpose of the Time Delay Chamber in the Liquid Release flowpath?

A
  • Time Delay Chamber gives sufficient delay time in the release flowpath- allows RRV-285 to close in time to prevent the release of bad water.
7
Q

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

A
  • Interlocked so that both cannot be closed at the same time (prevents backing up of drains)
  • RRV-255/256 Fail open
8
Q

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

A
  • B. RCS Loop Drains, Reactor Vessel Flange Leak Off, SI Accumulator Tank Drains
9
Q

What Drain sources tap into RCDT Outlet piping?

A
  • RCP #3 Seal

- PRT

10
Q

What drains into the CWHUT and Clean Sump Tank?

A
  • Hard Piped equipment drains from the 609’ and above go to CWHUT
  • Hard Piped drains on the 587’ drain to Clean Sump Tank
11
Q

Where does the Hot Chem Lab drain to?

A
  • CDT
12
Q

What 3 sumps are pumped out of containment?

A
  • Lower Ctmnt Sump
  • Reactor Cavity Sump
  • Pipe Tunnel Sump
  • All pump to DWHUT (preferred)/CWHUT
13
Q

Clean/Dirty Sump tank overflow to?

A
  • Aux Sump