Pzr Relief Tank

Question 1

Inputs to PRT

Answer 1

Pzr PORV’s & Saftey’s

ECCS relief valves

Misc valves stem leakoff

Question 2

Describe PRT

Answer 2

1800 ft3, carbon steel, 100 psig-full vacuum tank

Drains to RCDT

Has integral valve stem leak detection panel used to locate valves with excessive stem leakage ( red when temp > 212 deg)

Question 3

Auto interlocks for PRT

Gas analyzer valves (8034A & B)

Primary water supply (8029)

N2 supply valves (8045 , 8035)

Vent hdr Press Control vlv ( PCV-472)

Answer 3

Auto close on phase A

Phase A

Phase A / maintains 2.5-3.5 psig

Closes at 10 psig PRT Press

Question 4

All process streams into PRT?

Answer 4

• RCS from relief/safety/leakoff
• primary water to cool/ fill PRT
• nitrogen for cover gas

Question 5

Precautions and limitations for PRT

Answer 5

• don’t align gaseous radwaste system to PRT until both purged go O2
• don’t drain and vent to atmosphere until [ O2] < 5cc/kg , unless Chem manager permission