SR- Solid Radwaste Flashcards
[SR]
[[SR] Purpose?
Handles & packages:
concentrated [LR],
spent resins,
disposable filters,
and (DAW) dry active waste
[SR]
How does the [SR] handle spent resin? (3)
1-Resin is sluiced to a liner (high integrity container (HIC)),
2-dewatered,
3-and dried with the resin drying system.
[SR]
What tank can be used to flush and decontaminate [SR]?
RMWT - Reactor Makeup Water Tank
[SR]
What flushes [SR] after volume reduction?
DS (Domestic Water)
[SR]
If an alarm is received in RW, how long before it is received in the Main CR?
-5 minutes
(if not acknowledged in RW CR)
[SR]
Which [SR] Spent Resin Tank normally receives spent resin from [LR] adsorption bed and mixed bed demineralizers?
Low Activity Spent Resin Tank
[SR]
What resin does [SR] High Activity Spent Resin Tank normally receive?
-[CH] & [PC]
- Spent resin from [CH]
(purification, deborating and pre-holdup ion exchangers)
- Spent resin from [PC] cleanup Ion Ex.
- Resin >500 mr/hr
[SR]
Where is dilution water injected into the [SR] Spent Resin Tanks?
-At the bottom head near the resin removal line
-facilitate dilution and mixing of the resin as the slurry enters the resin outlet pipe
[SR]
How is resin removal accomplished in the Spent Resin Tanks?
-By a line inside a line, which provides sluice water in the outer pipe area through a Johnson screen to the inner pipe area, near the tank bottom. This transports resin with an educator effect as the water/resin exits the inner pipe
[SR]
What connections are provided as a backup method for fluidizing the spent resin tank beds in the SR system?
Air and nitrogen connections
[SR]
What is the purpose of the SR Resin Transfer/Dewatering Pump? What kind of pump is it?
Transfers spent resin from various ion exchangers/demineralizers to the high and low spent resin tanks
Also transfers the contents of the spent resin tanks to the resin drying system
progressing cavity positive displacement
[SR]
Why is the fluid discharged from the SR Resin Transfer/Dewatering Pump free of pulsations or vibrations?
It does not use pistons or valves
[SR]
What system supplies the mechanical seal to the SR Resin Transfer pump?
RWMT
[SR]
What would cause the SR Resin Transfer pump to stop? Where can this pump be controlled from? Location?
Low suction pressure and electrical overload condition
RW control room, solidification panel and local handswitch
100’ RW building
[SR]
When the Resin Transfer pump starts, why is a signal sent to deenergize solenoid valve SRN-HY-402?
Opens valve SRN-HV-402, which supplies reactor makeup water to pump seals
[SR]
Following a loss and restoration of power to the Resin Transfer pump, how is the pump restarted?
Manually
[SR]
What is the purpose of the Vendor system?
Designed to convert plant evaporator concentrates into a non-dispersible form, which is packaged in 55 gallon drums for disposal
[SR]
What is the purpose of the Radioactive Filter Transfer Cask?
Used to shield highly radioactive filters while being transported from the filter vault(120’ aux building) to a disposable container (RW building)
[SR]
How thick is the lead shielding in the SR Filter Transfer Casks?
8 inches
[SR]
What are some of the requirements on using the Disposable Containers in the SR system?
Must be chemically compatible with the waste material so that the waste material does not adversely affect the integrity of the container
Container needs to have the proper dewatering internals system consistent with the waste being processed
[SR]
What boxes are used for DAW storage and transport?
Connex boxes
In the SR system, what does NH power?
Spent resin transfer/dewatering pump and motor space heater
solidification panel
What does NK power?
Control panel annunciators
What other system inputs does SR receive?
liquid waste from LR (reduced, vacuum dried, put into 55 gal. drum or HIC)
resin from LR, CVCS and PC (sluiced to a liner or HIC, dewatered and dried in resin drying system)
disposable solid radwaste generated by plant operation
