CH-Radio Active Collection, Processing, and Storage Subsystem

Question 1

What is the function of the Reactor Drain Tank (RDT)?

Answer 1

Receives and condense discharge from PZR safety valves to prevent release into containment
Receives thermal relief valve discharges from SDC& SI
Receives gravity drains from RCP vapor seal leak off
Receives gravity drains and leaks of Rx grade water from components in containment

Question 2

What is the design of the Rx Drain Tank RDT?

Answer 2

2850 gallons, Slight Nitrogen Blank .5psia, Quench water volume 52%

Question 3

What does the Containment Atmospere Rupture valve do in the RDT?

Answer 3

Set at 120psia to protect safety relief valve from getting stucke

Question 4

What is the purpose of the Equipment Drain Tank (EDT)?

Answer 4

Receives gravity drains from the recycle drain header and ion exchange drain header.
Receives gasStripper bypass for up to 30 mins

Question 5

What is the design of the EDT?

Answer 5

10,500 gallons, Nitrogen blanken 3 psig, quench water volume 35%, Pressure Hi-Hi 7 psig, Pressure relief to Non -ESF sump (RD)

Question 6

What is the purpose of the Reactor Drain Pumps (RDP)?

Answer 6

Transfer contents from RDT or EDT to the CVCS hold up tank.

Question 7

What is the flow path from the Rx Drain Pumps to the CVCs hold up tank?

Answer 7

Pump to Rx Drain Tank Filter through Letdown from VCT divert to Pre-Holdup Ion Exchanger (PHIX) bypasses Gas Stripper to the CVCS Hut

Question 8

What is the purpose of the Pre-Holdup Ion Exchanger?

Answer 8

Supplemental purification of the letdown with hi levels of radionuclides or contaminants.
Reduces chemical contaminants prior to BAC

Question 9

What is the design of the Pre-Holdup Ion Exchanger (PHIX)?

Answer 9

Purifies liquid from RDP discharge, VCT diverison, or CVCS HUT in normal operation.
Max flow 150 gpm, mixed bed cation/anion

Question 10

What is the purpose of the Gas stripper?

Answer 10

Removes non-condensable gases from letdown flow streams as needed.

Question 11

What is the design of the gas stripper?

Answer 11

Heat Recovery HX preheats to 150, Pre-heater heats to 240, Stripper Column separates gases and pumps liquids out, After Cooler cools liquid to 130* before sending to VCT or HUT.

Question 12

What two sources to the Reactor Drain Pumps use?

Answer 12

RDT and EDT