MSIV Closure and Setpoints

Question 1

What will cause the MSIVs to close?

Answer 1

1) Low Main Steam Line Pressure. 2) Low Condenser Vacuum. 3) Low Reactor Level. 4) High Main Steam Line Flow. 5) High Turbine Building Temperature. 6) High Steam Tunnel Temperature. 7) Manual.

Question 2

What is the closure setpoint for Low Main Steam Line Pressure?

Answer 2

807 psig

Question 3

What is the closure setpoint for Low Condenser Vacuum?

Answer 3

21.5 in HgA

Question 4

What is the closure setpoint for Low Reactor Level?

Answer 4

Level 1(16.5 inches)

Question 5

What is the closure setpoint for High Main Steam Line Flow?

Answer 5

254 psid

Question 6

What is the closure setpoint for High Turbine Building Temperature?

Answer 6

145.8 F

Question 7

What is the closure setpoint for High Steam Tunnel Temperature(2)?

Answer 7

156 F or 152.5 F

Question 8

What is required to bypass the MSIV closure on Low Main Steam Line Pressure?

Answer 8

The Mode Switch being in a position other than RUN.