Auxiliary Steam (AS)

Question 1

What is normal Aux steam pressure?

What indication and controls does the control room have for this sytem?

Answer 1

250 psig

temperature and pressure

no controls

Question 2

At what pressure will the main aux steam line pressure relief valves lift?

Answer 2

275 psig

Question 3

What are the Aux steam loads?

Answer 3

Gland sealing steam regulator which supplies gland seals for the MFP turbines and the Main Turbine during unit startup.
Main Feed Pump Turbines for over-speed testing.
Aux Feed Pump Turbine for over-speed testing.
Fourth point feedwater heating for start-up feedwater heating.
Radwaste machines and gas stripper
seal injection Hx (blank flanged off)
MSRs for steam blanketing

Question 4

What is aux steam header pressure going to the aux building?

Answer 4

50 psig

Question 5

What pressure is provided from aux steam to the MSRs for blanketing?

Answer 5

52.3 psig

Question 6

What is the purpose of the Aux steam crosstie header isolation valves?

ASN-V015

V014

Answer 6

1 unit has V015 open to supply the crosstie header

other units have V014 open to accept from the header if needed

Question 6

What happens on a Hi radiation detection from RU-7?

Answer 6

Closed ASN-RV-11A/ Opens ASN-RV-11B

Aligns Condensate Receiver Tank/ Pumps to LRS TDS Tank

Question 7

regarding the ASCRT pumps, when do they start and stop? (HS in auto)

what needs to happen if we lose both pumps?

Answer 7

High level - 1st pump starts
high-high level - 2nd pump starts
Lo level - both pumps stop

isolate AS to the aux building so we dont flood aux building HVAC