Radwaste

Question 1

What are the 5 systems of liquid radwaste?

Answer 1

Equipment Drains (CRW)
Floor Drains (DRW)
Regenerate Waste (ARW)
Chemical Waste
Detergent Waste

Question 2

Describe the purpose of the equipment drains.

Answer 2

• High purity waste. Processed via precoat filter and deep bed demineralizer.
  
  • After recirc and sample analysis, water can be sent to the river, the CST, or back for reprocessing.
  • DW sumps are cooled by chill water and RB sumps are cooled by RACS to prevent flashing in the sumps.

Question 3

Describe the purpose of the floor drains.

Answer 3

• Low purity waste. Processed via precoat filter and deep bed demineralizer.
  
  • After recirc and sample analysis, water can be sent to the river, the CST, the Waste Neutralizing Tanks (WNT) for segraegation, or back for reprocessing.

Question 4

Describe the purpose of regenerative waste.

Answer 4

High conductivity waste. Slowly drained to floor drain system.

Question 5

Describe the purpose of the chemical waste.

Answer 5

Very high conductivity waste. Slowly drained to the regenerate waste system.

Question 6

Describe the purpose of the detergent waste.

Answer 6

Decontamination and general cleaning water from inside RCA. Discharged to river via mech filter.

Question 7

What are the different ways we process radwaste?

Answer 7

1. Filtration (via precoat filter or mechanical fiber filter)
   These are PCIS Isolations →
2. Demineralization (mostly via deep bed demineralizers)
   
   • Precoat filters provide limited demin capability
3. Evaporation (evaps no longer in use)
   
   • Vendor supplied casks dry liquid and solid rooneywaste for transport and burial

Question 8

What important functions are lost during a loss of radwaste?

Answer 8

1. RWCU: loss of blowdown path and backwash capability.
2. RHR: loss of torus letdown and RHR warmup.
3. Condensate: Inability to rinse condensate polishers. Loss of CST makeup.

Question 9

What important functions are lost during a loss of radwaste?

Answer 9

1. RWCU: loss of blowdown path and backwash capability.
2. RHR: loss of torus letdown and RHR warmup.
3. Condensate: Inability to rinse condensate polishers. Loss of CST makeup.

Question 10

how is solid radwaste(ie spent resin) processed?

Answer 10

1. RWCU – sent to Clean up phase separator
2. Floor drain, equipment drain, and FPCC precoat resin – Sent to the waste sludge phase separator
3. Floor Drain, equipment drain, and FPCC polisher resin – Sent to spent resin tank.
4. Dry solid Rooneywaste is collected, packaged, and sent off site for incineration or burial.

Question 11

What are the isolation signals for drywell equipment & floor drains?

Answer 11

Level 2 (-38”)
1.68# DW
RB Hi Rad (1x10-3ucu/cc)

*Isolates F019 & F020 for the Equip drains and F003 & F004 for the Floor drains. Each drain also has one AOV which will open when a pump is running.

Question 12

What are the 3 ways to process radwaste?

Answer 12

1. Filtration (via precoat filter or mechanical fiber filter)
2. Demineralization (mostly via deep bed demineralizers)
   
   • Precoat filters provide limited demin capability
3. Evaporation (evaps no longer in use)
   
   • Vendor supplied casks dry liquid and solid rooneywaste for transport and burial

Question 13

What is the impact of losing radwaste?

Answer 13

1. RWCU: loss of blowdown path and backwash capability.
2. RHR: loss of torus letdown and RHR warmup.
3. Condensate: Inability to rinse condensate polishers. Loss of CST makeup.