Condensate

Question 1

What is the tech spec minimum of the CST?

Answer 1

• 182,000gal

Question 2

What are the HWP auto starts?

Answer 2

• Low # at:
  130# (U1)
  110# (U2)

Question 3

What are the HWP trips?

Answer 3

• Overload/Overcurrent

Question 4

What powers the HWPs?

Answer 4

• 1/2D North
• 1/2A Middle
• 1/2C South

Question 5

What are the CBP auto starts?

Answer 5

• Low pressure at 325#

Question 6

What are the CBP trips?

Answer 6

• Overload/Overcurrent

Question 7

What is the flow capacity of the LP #1 heaters?

Answer 7

• Each string supplies 50% flow (We have 3)

Question 8

What is the flow capacity of the LP #2-4 heaters?

Answer 8

• Each string supplies 80% flow (we have 2 strings) with a bypass that can provide 20% flow via CRV-224

Question 9

What does CRV-55 do for you?

Answer 9

• Allows makeup from the CST to the Condenser Hotwells (Sensed on A and C hotwell lvl)

Question 10

What does CRV-155 do for you?

Answer 10

• Allowd for excess condensate from hotwells to go back to the CST (Sensed on A and C hotwell lvl)

Question 11

What does CRV-224 (2,3,4 Heater bypass valve) do?

Answer 11

• Allows having a heater string out and provides 20% flow
• Auto modulates open when MFP suction < 240#
• Trips open at 210# MFP Suction #

Question 12

How do you reset CRV-224 (2,3,4 Heater bypass valve)?

Answer 12

• To reset, MFP Suction pressure > 260# and run controller to open

Question 13

What do CRV-201-203 (Condensate Booster Pump Recirc Valves) do?

Answer 13

• Maintain 4000 gpm on running pumps

- ** Flow switch is on the common discharge header**

Question 14

Where is the flow switch located for the Condensate Booster Pump Recirc Valves?

Answer 14

• ** Flow switch is on the common discharge header**

Question 15

What do CMO-101(102) (SJAE bypass valves) allow?

Answer 15

• Manually position to achieve desired DP across SJAEs

- Prevents exceeding design flow of SJAEs

Question 16

How much hood spray does each unit have?

Answer 16

• 138gpm (U1)

- 1200gpm (U2)

Question 17

What does CMO-61 (SJAE and HWP recirc line valve) do for you?

Answer 17

• Provides continuous flow path from steam jet air ejector header to the main condensers to maintain minimum flow through the hotwell pumps and steam jet air ejector condensers
• 2400gpm min per pump

Question 18

What does T.S. 3.7.6 (CST) state

Answer 18

• 2 Hrs at mode 3 steaming through the dump valves, MSSVs, or SG PORVs with cooldown with RHR
• 9 Hrs at mode 3 steaming though MSSVs or SG PORVs with no cooldown with RHR

Question 19

What suction pressure do the CRV-224 valves help to maintain?

Answer 19

• 210#-240# at the MFP suction

Question 20

What Unit(s) have Condenser equalizations and what are they for?

Answer 20

• Unit 1

- to maintain even stresses on the Turbine bearings

Question 21

What actuates hood spray in Unit 1 (CRV-102) and Unit 2(CMO-40)?

Answer 21

• Generator Load < 7.5%
• Turbine Speed > 900 rpm
• Manual

Question 22

If ‘A’ Hotwell is providing input to the HW Lvl Ctlr, then which hotwell level is being displayed on the Chart Recorder?

Answer 22

• ‘C’ Hotwell level is being displayed on the chart recorder

Question 23

How does CRV-55 fail?

Answer 23

• CRV-55 fails closed

Question 24

How does CRV-155 fail?

Answer 24

• CRV-155 fails closed

Question 25

What is the purpose of the condensate system

Answer 25

- Returns condensed steam from main condensers and feedwater heater drains to the S/Gs while maintaining overall water inventory throughout the cycle - Compensates for loss of fluid from the steam cycle when an atmospheric steam dump occurs

Question 26

What power the CBPs

Answer 26

- 1/2D North - 1/2 A Middle - 1/2 C South

Question 27

Why is there a unit difference with regards to the equalizing ducts between condensers

Answer 27

- U1 1 bearing between LPTs | - U2 2 bearings between LPTs

Question 28

What is a secondary, non-safety related, function of the CST

Answer 28

- Supplies MFP seal water pump

Question 29

What isolates the CST from atmosphere

Answer 29

- Travelling bladder inside the tank