LOT 203.14 GWPS

Question 1

• LOT 203.14 GWPS*
• • *

Where are the GWPS components physically located?

Answer 1

MAB 10’

Controlled from Radwaste Control Panel

Question 2

• LOT 203.14 GWPS*
• • *

What will auto shutdown the GWPS?

Answer 2

Boron Recycle Holdup Vent Pressure - Low

Bellows Compressor Leak

Inlet Pressure - High

System Flow - High

• *Room H₂ - High (4)**
• 87.5% of lower flammability limit*
• *O₂ - High**
• 20% of scale (1%)*
• *Outlet Radiation - High (RT-8032)**
• Adjacent-to-line gamma scintillation detector*

Closes system inlet (FV-4657), outlet (FV-4671), Boron recycle tank vent (FV-4651), and secures bellows compressor.

• Note:*
• Two radiation detectors in system (RT-8031/8032). Only RT-8032 will shutdown system.*

Question 3

• LOT 203.14 GWPS*
• • *

When starting up the GWPS, how long must the system be purged?

Answer 3

• System breach for Calibration/Replacement of O₂ sensor:*
• *≥ 2 hrs**
• System breach for High O₂ or Extended shutdown:*
• *≥ 16 hrs**

Question 4

• LOT 203.14 GWPS*
• • *

What is the GWPS O₂ limit IAW TRM 3.11.2.5 Explosive Gas Mixture?

Answer 4

3%

TRM 3.11.2.5 Explosive Gas Limit

Applicability: At all times

Placing inlet (FV-4657) OR outlet (FV-4671) handswitches in OPEN causes O₂ sensor to become inoperable.

• Note:*
• 0%-5% range normally selected because system trip will occur at 20% of scale (1%).
• If 0%-25% range selected, trip would be 5% (Above TRM limit)

Question 5

• LOT 203.14 GWPS*
• • *

What is a good DF value for the GWPS beds?

Answer 5

≥ 100

^{Inlet Activity}/_{Outlet Activity}

Question 6

• LOT 203.14 GWPS*
• • *

What are the influents to the GWPS?

Answer 6

Low pressure N₂

PRT

RCDT

LWPS Waste Evaporator

BRS Recycle Evaporator

BRS Recycle Holdup Tanks

VCT

Rx Head Degassing Tank

Question 7

• LOT 203.14 GWPS*
• • *

What are the principle isotopes of concern for the GWPS?

Answer 7

Kr-85

Xe-133

Question 8

• LOT 203.14 GWPS*
• • *

What is the max temperature allowed for a GWPS charcoal bed?

Answer 8

85 ˚F

Requires one MAB supply and exhaust fan operating