Feedwater Heaters

Question 1

Whater are Turbine/Gen load limits with D heaters out of service?

Answer 1

1 string - 95%
2 strings - 95%
3 strings - 100%

Question 2

Whater are Turbine/Gen load limits with C out of service?

Answer 2

1 string - 680MWe

Question 3

Whater are Turbine/Gen load limits with B out of service?

Answer 3

1 string - 450MWe

Question 4

Whater are Turbine/Gen load limits with a single LP String out of service?

Answer 4

450MWe

Question 5

Whater are Turbine/Gen load limits with a single string of ALL Heaters (HP and LP) out of service?

Answer 5

450MWe

Question 6

Whater are Turbine/Gen load limits with a single D and C FWH out of service?

Answer 6

680MWe

Question 7

Whater are Turbine/Gen load limits with a singe D, C, and B FWH out of service?

Answer 7

620MWe

Question 8

Whater are Turbine/Gen load limits with a single C and B FWH OOS?

Answer 8

620MWe

Question 9

Whater are Turbine/Gen load limits with a single D and B FWH out of service?

Answer 9

620MWe

Question 10

What is the general rule of thumb for operating with multiple heaters out of service?

Answer 10

Any simultaneous combilation of multiple heaters out of servic should be limited to the lowest (limiting value)

Question 11

What effect does removal of heaters have on Rx power?

Answer 11

Positive reactibity addition would occur due to FWH temp drop

Question 12

How is the Extraction Valve “SLOWLY” opened?

Answer 12

Placing valve in PTS prevents further travel