CVCS

Question 1

If all charging pump breakers go open what happens to the letdown HCV’s?

Answer 1

HCV 1200A, 1200B and 1200C go closed when no charging pumps are operating.

Question 2

Other than CVCS what other systems use the letdown filter?

Answer 2

RHR and Reactor Purification

Question 3

What is Normal Excess letdown flow?

Answer 3

15GPM

Question 4

When purging the VCT what gas is added?

Answer 4

Nitrogen.

Question 5

What happens on a high VCT signal?

Answer 5

LCV-1115A will go full open and divert to the PDT.

Question 6

Other the the MCR, where can we operate the charging pumps from?

Answer 6

Auxiliary Shutdown Panel.

Question 7

Why do we use caution when raking the charging pump breakers.

Answer 7

Could possibly trip the other charging pump.

Question 8

What position do you place the charging pump dampers when you are done with manual operation?

Answer 8

The original, pulled out position will allow it to operate in automatic.

Question 9

Which flows use the seal return heat exchanger

Answer 9

Excess Letdown
Charging pump mini flow recirc
Seal return

Question 10

Where is excess letdown normally aligned to.

Answer 10

Normally directed to the seal return header and diverted to the PDTT

Question 11

1204 A and B reposition to what on an SI signal?

Answer 11

Closed

Question 12

Do we use PCV-1114 during a Boration?

Answer 12

PCV-1114 is NOT used during a boration

Question 13

Auto closure and Fail positions for:

LCV-1460 A&B

Answer 13

Auto closes on PZRlevel of 14.4%
Fail closed (app R)

Question 14

Auto closure and fail position of CH-TV-1204 A&B?

Answer 14

Close on SI signal and fails closed

Question 15

Auto closure and fail position of PCV 1145

Answer 15

Controls back pressure at 300#

Fails open

Question 16

Auto and fail position of TCV-1143

Answer 16

Divert letdown to VCT at 145 F.

Fails to divert

Question 17

fail position of HCV-1244

Answer 17

Fails to Direct letdown to VCT

Question 18

VCT Controller 1115 controls what?

Answer 18

85% - Divert 115A to PDT
82% - High level alarm
34% - Auto makeup stops
27% - Auto makeup starts
24% - low level alarm
13% - signal to isolate VCT (2/2 w/ 1112)

Question 19

Sources of water to Normal CHP suction?

Answer 19

VCT
RWST
B LHSI pump
Other unit RWST
Emergency Borate line
Manual Borate
Manual Dilute
Blender
Chemical addition tank
Seal return

Question 20

Sources of water to the Alternate CHO suction

Answer 20

A LHSI pump discharge only

Question 21

Flowpath from the Normal CHP disch header?

Answer 21

Normal CH line to B cold leg
RCP seal injection
Aux Spray
HHSI to Hot or Cold legs

Question 22

Alternate CHP Disch possible flowpath?

Answer 22

Loop fill
RCP seal injection
HHSI to Hot or Cold legs

Question 23

Which two CH pumps can use the cross tie?

Answer 23

1-CH-P-1C

2-CH-P-1C

Question 24

What 3 flows connect into the seal return line.

Answer 24

Seal return
Excess Letdown
CHP miniflow recirc

Question 25

State the CHP auto starts…

Answer 25

For each: -Low disch pressure of <1176 psig for 10sec.
- SI signal
     (A - A, B - B, C - A or B)
-UV/DV on opposite emergency bus
-Both other CHP breakers open

Question 26

CH pump trips:

Answer 26

Phase Over current or Ground
Switch in PTL
A) UV/DV on H bus and C normal pump breaker closed and running
B) UV/DV on J bus and C alt breaker closed and pump running
C) UV/DV on H bus and A pump still running with breaker closed after 1sec