WSS - Solid Waste System

Question 1

Describe the purpose of the Radioactive Solid Waste (WSS) system

Answer 1

provides holdup, packaging, and storage facilities for radioactive materials prior to their offsite shipment and disposal.

Question 2

Describe the function and location of the Spent Resin Hold Tank (WSS-TK3)

Answer 2

functions to hold spent resin prior to solidification
capacity of 250 cu. ft. of resin

It is located on the 24’ level of the Waste Disposal Building NE corner by the HTS panels.

Question 3

Describe the function and location of the Spent Resin Transfer Pump (WSS-P6)

Answer 3

located on the 14’6” level of the Waste Disposal Building (north side of the hallway, one room west of the Recycle pump)

Provides suction from the spent resin hold tank & provides flushing pressure

Question 4

Does the Spent Resin Transfer Pump move spent resin?

Answer 4

NO, used to sluice resin but doesn’t pump resin slurry

Question 5

Where is WSS-P6 controlled from?

Answer 5

WSS-P6 is controlled from the Solid Waste Control Panel with a push button to start/stop.

Question 6

Describe the function and location of the Spent resin Transfer Pump Filter (WSS-FLT1)

Answer 6

functions to filter any remaining resin fines or crud out of the flush water, minimizing system contamination.

located on the 36’ level of the Waste Disposal Building NE corner by the Dewatering Tank room.

Question 7

Describe the function and location of the Spent resin Dewatering Tank (WSS-TK1)

Answer 7

control the volume of liquid in the solid waste system

located on the 36’ level of the Waste Disposal Building NE corner - Locked High Radiation Area

Question 8

What is the reason for the minimum level kept in the Spent Resin Dewatering Tank?

Answer 8

NPSH for 3WSS-P2 & P6
Surge volume
Ensures Spent Resin Hold Tank is full for shielding

Question 9

What purpose does the retention element play in the Spent Resin Hold Tank?

Answer 9

allows transfer pump (P6) to remove only water from hold tank slurry content

Question 10

Describe the function and location of the Spent Resin Recycle Pump(WSS-P2)

Answer 10

functions to transfer resins from the Hold Tank to the Waste Shipping Container

positive displacement pump

located in its own cubicle on the 14’ level of the Waste Disposal Building, north side of the hallway, east end (just west of the Boron Recovery System Evaporator Feed Pump rooms)

Question 11

How is 3WSS-P2 protected from overpressure?

Answer 11

Stops automatically on high dp of 100 psig (WSS-PS32)

Question 12

Describe the function and location of the Resin Sampler (WSS-SMP1)

Answer 12

used to collect samples to determine the level of radioactivity

It is located on the 14’ level of the Waste Disposal Building in the Recycle Pump room (control panel just outside the room)

Question 13

The permanently installed portion of the system consists of a control panel located where?

Answer 13

24’ 6” level of the Waste Disposal Building

Question 14

What is the source of makeup water to the dewatering tank?

Answer 14

PGS

Question 15

What are the two types of shipping containers? What are their purposes?

Answer 15

The High Integrity Container (HIC) and the Solidification container

HIC - is used for slurries and is equipped with an integral dewatering line and pump

Solidification container - is used for solidification of liquids (i.e., waste bottoms holding tank contents) and is equipped with an integral mixing blade assembly

Question 16

After all solid waste operations are completed, 3WSS—TK1, spent resin
dewatering tank, should be filled with water to at least ____% to cover any
spent resin remaining in tank.

Answer 16

10%

Question 17

Resin in a demineralizer or ion exchanger is considered spent when?

Answer 17

the decontamination factor falls below a predetermined value (DF)
OR
when the surface dose approaches a predetermined limit (dose rate)
OR
when the resin bed pressure drop becomes excessive (D/P)

Question 18

Why is the Spent Resin Dewatering Tank required to be kept greater than or equal to 10% after solid waste operations are complete?

Answer 18

To ensure that any spent resin remaining in the Spent Resin Dewatering tank is covered

Question 19

What is the primary purpose of the Spent Resin Transfer Pump?

Answer 19

To transfer spent resin from various demins and ion exchangers to the Spent Resin Hold Tank, 3WSS-TK3

Question 20

Why must the Spent Resin Recycle Pump, 3WSS-P2 have a flow path established prior to starting the pump?

Answer 20

It is a positive displacement pump, and there is no minimum flow recirculation path provided

Question 21

How is the discharge of the Spent Resin Recycle Pump “3WSS-P2” protected from overpressure?

Answer 21

Pump discharge pressure trip and discharge relief valve

Question 22

What is the purpose of the Spent Resin Hold Tank 3WSS-TK1?

Answer 22

To store the spent resin until it can be transferred to a shipping container