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NLO Systems > SR- Solid Radwaste > Flashcards

SR- Solid Radwaste Flashcards

1
Q

What is the purpose of the SR system?

A

Handles and packages concentrated liquid radwaste, spent resins, disposable filters and dry active waste (DAW)

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2
Q

How does the SR system handle spent resin?

A

Spent resin is sluiced to a liner or high integrity container (HIC) and dewatered and dried with the resin drying system

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3
Q

What tank can be used to flush and decontaminate the SR system?

A

Reactor Makeup Water Tank

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4
Q

What system is used to flush the vendor system after volume reduction in the SR system?

A

DS

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5
Q

Where are the local control panels, ZRN-E01 and SRN-E01, for the SR system located?

A

ZRN-E01 (instrument cabinet) in the Radwaste Control Room

SRN-E01 (solidification panel) outside the high level storage area

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6
Q

If an alarm is received in the Radwaste Control room, how long before it is received in the Main Control Room?

A

Within 5 minutes if it is not acknowledged in the Radwaste Control room

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7
Q

Concerning the SR Spent Resin Tanks, which one normally receives spent resin form the LR system’s adsorption bed and mixed bed demineralizers?

A

Low Activity Spent Resin Tank

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8
Q

What does the SR High Activity Spent Resin Tank normally receive?

A

Spent resin from the CH systems purification, deborating and pre-holdup ion exchangers and the PC system’s cleanup ion exchangers

(resin exceeding 500 mr/hr)

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9
Q

Where is dilution water injected into the SR Spent Resin Tanks?

A

At the bottom head near the resin removal line to facilitate dilution and mixing of the resin as the slurry enters the resin outlet pipe

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10
Q

How is resin removal accomplished in the SR Spent Resin Tanks?

A

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

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11
Q

What connections are provided as a backup method for fluidizing the spent resin tank beds in the SR system?

A

Air and nitrogen connections

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12
Q

What is the purpose of the SR Resin Transfer/Dewatering Pump? What kind of pump is it?

A

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

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13
Q

Why is the fluid discharged from the SR Resin Transfer/Dewatering Pump free of pulsations or vibrations?

A

It does not use pistons or valves

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14
Q

What system supplies the mechanical seal to the SR Resin Transfer pump?

A

RWMT

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15
Q

What would cause the SR Resin Transfer pump to stop? Where can this pump be controlled from? Location?

A

Low suction pressure and electrical overload condition

RW control room, solidification panel and local handswitch

100’ RW building

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16
Q

When the Resin Transfer pump starts, why is a signal sent to deenergize solenoid valve SRN-HY-402?

A

Opens valve SRN-HV-402, which supplies reactor makeup water to pump seals

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17
Q

Following a loss and restoration of power to the Resin Transfer pump, how is the pump restarted?

A

Manually

18
Q

What is the purpose of the Vendor system?

A

Designed to convert plant evaporator concentrates into a non-dispersible form, which is packaged in 55 gallon drums for disposal

19
Q

What is the purpose of the Radioactive Filter Transfer Cask?

A

Used to shield highly radioactive filters while being transported from the filter vault(120’ aux building) to a disposable container (RW building)

20
Q

How thick is the lead shielding in the SR Filter Transfer Casks?

A

8 inches

21
Q

What are some of the requirements on using the Disposable Containers in the SR system?

A

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

22
Q

What boxes are used for DAW storage and transport?

A

Connex boxes

23
Q

In the SR system, what does NH power?

A

Spent resin transfer/dewatering pump and motor space heater

solidification panel

24
Q

In the SR system, what does NK power?

A

Control panel annunciators

25
Q

What other system inputs does SR receive?

A

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

26
Q

How does Ancillary buildings HVAC interface with SR?

A

Dry Active Waste Processing and Storage facility HVAC

27
Q

What does IA do for the SR system?

A

air operated valves

28
Q

What are the differences between the HASRT and LASRT? Where are they located?

A

HASRT has more shielding around it

100’ RW building

29
Q

In the SR system, how is level tracked in the spent resin tanks?

A

spreadsheet based on calculated inputs and outputs

30
Q

What are the major components of the resin drying system?

A

waste transfer system

fillhead

piping skid

chiller

blower skid

control panel

humidity monitoring system

remote video system

31
Q

In the SR resin drying system, what is the waste transfer system?

A

high pressure flexible hoses and pneumatic ball valves connecting the spent resin tanks transfer piping to the fillhead

32
Q

In the SR resin drying system, what is the fillhead?

A

provides the connections between the waste transfer system and the disposable container

connects to the piping skid to remove excess water from the container

connects to the blower skid for incoming dry, hot air for drying process

also contains the video camera, electrical connections, pressure switch and cooling air supply

33
Q

In the SR resin drying system, what is the piping skid?

A

skid with hose connections for processing powdered and bead resins, entrainment separator tank to collect the removed water, and an air driven pump to remove the water from the separator tank

34
Q

In the SR resin drying system, what is in the entrainment separator tank that condenses the moisture in the air that is pumped through the resin bed during the drying process?

A

refrigeration coils

35
Q

In the SR resin drying system, what is the chiller unit for?

A

contains a compressor, hoses and cooling fan for cooling the separator tank

36
Q

In the SR resin drying system, what is the blower skid?

A

a blower to recirculate the air trough the drying system components

oil separators and filters to remove oil and particulates from recirc air

37
Q

In the SR resin drying system, what is the humidity monitoring system?

A

measures the humidity of the entrainment separator tank

38
Q

In the SR resin drying system, what is the remote video monitoring system?

A

camera mounted to verify level during resin transfer with light dimmer control

39
Q

Concerning the SR resin drying system waste container, what do you need to beware of? What is done to solve this issue?

A

exothermic reactions

flood the container with plant sourced water

40
Q

What is the most important feature of the SR resin drying system?

A

ability to remotely stop resin flow to prevent over filling

41
Q

Concerning the SR radioactive filter transfer cask, the monorail hoist grapple hook design provides a positive attachment system. How does that work? Where is the hoist mounted?

A

remains locked under the weight of the filter cartridge

120’ aux. building ceiling

42
Q

Why would AO’s need to go into the DAWPS facility?

A

fire alarm activated, U# AO to investigate all areas inside, including the offices and change area, the Storage and processing area RCA

NLO Systems (66 decks)

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