Reheat Steam

Question 1

What are the condenser vacuum trips, and what does each trip?

Answer 1

21” - Main turbine trip and SCRAM if > 26% pow
16” - RFPT trip

12” - Combined stop and control valves close

9” - MSIVs close. Rx scram if mode switch in RUN

Question 2

What does the steam chest feed?

Answer 2

MSR 2nd stage

Question 3

What steam lines feed MSR ‘A’?

Answer 3

B and D

Question 4

What steam lines feed MSR ‘B’?

Answer 4

A and C

Question 5

How much steam can be bypassed?

Answer 5

30%

Question 6

what’s the purpose of bleeder trip valves?

Answer 6

prevent reversal of extraction steam after turbine trip and prevent against water induction into the turbine

Question 7

What’s the auto close of the bleeder trip valves?

Answer 7

Hi Hi level in associated drain tank OR

Turbine Trip

Question 8

What are the loads off the equalizing header?

Answer 8

** CROSS **

C - Combined bypass stop and control valves

R - RFPT supply steam @ LOW POWER

O - Offgas preheater

S - SJAE

S - Seal steam generator @ LOW POWER

Question 9

Where does MSR A/B get steam for its first stage reheater?

Answer 9

5th stage high pressure turbine

Question 10

Where does the seal steam generator get its steam from? (low and high power)

Answer 10

Low power - Equalizing header

High power - Crossover steam (goes by many names)

Question 11

What are the other ways of saying crossover steam?

Answer 11

cold reheat, high pressure turbine exhaust, 10 stage high pressure turbine, #5 HPFWH extraction steam

Question 12

Name each feedwater heater’s steam sources

Answer 12

6 5 4 3 2 1 - Feed water heaters (steam load)

5 X 3 5 6 7 - Steam source