Primary

Question 1

Loop 1 starting at RCP

Answer 1

CL
Narrow Tcold
PZR spray
Accum / RHR / SI injection
Normal CVCS charging
HL
RHR suction / SI injection
Narrow Thot x 3
IL
Flow

Question 2

Loop 2 (start at RCP)

Answer 2

CL
Narrow Tcold
PZR spray
Accum / RHR / SI
HL
RHR injection
Narrow Thot x 3
IL
Flow

Question 3

Loop 3 (start at RCP)

Answer 3

CL
Narrow Tcold
Accum / RHR / SI
HL
RHR injection
Narrow Thot x 3
IL
Flow
Normal CVCS letdown

Question 4

Loop 4 (start at RCP)

Answer 4

CL
Narrow Tcold
Alternate CVCS charging
Accum / RHR / SI
HL
Narrow Thot x 3
PZR surge
RHR suction
SI injection
IL
Excess letdown

Question 5

Where does the PZR connect?

Answer 5

Loop 1 spray line
Loop 2 spray line
Loop 4 surge line

Question 6

Where does the CVCS connect?

Answer 6

Loop 1 normal charging
Loop 3 normal letdown
Loop 4 alternate charging
Loop 4 excess letdown

Question 7

Pros / cons of constant Tavg program

Answer 7

+ constant volume (minimize PZR)
+ smaller MTC impacts
- large steam pressure variations

Question 8

Pros / cons of constant Psteam

Answer 8

+ turbine simpler

• Thot too high; low DNB margin
• Large PZR
• Large MTC impacts

Question 9

CVCS functions

Answer 9

RCS inventory (PZR level)
RCP seal injection
Chemistry
High head SIS flow
Fill /drain RCS

Question 10

List the CVCS heat exchangers and what cools them

Answer 10

Regen - flow returning to the RCS
Letdown - CCW
Seal - CCW
Excess letdown - CCW

Question 11

PZR level required to open letdown

Answer 11

17%

Question 12

Why is letdown limited to 120 gpm?

Answer 12

Protect the demins

Question 13

What should be isolated if letdown is isolated?

What should be maintained?

Answer 13

Charging

Seal injection

Question 14

Where does water go if the VCT gets too full?

Answer 14

Holdup tank

Question 15

What happens if the VCT gets too low?

Answer 15

CCP suction shifts to RWST

Question 16

What is the primary sign of a RCS leak?

Answer 16

Increased auto-makeup to the VCT

Question 17

CCP functions

Answer 17

PZR level control
Seal injection
High head SI

Question 18

What controls CCP flow? What happens if operator adjusts seal flow?

Answer 18

Automatic PZR level control

The system will automatically compensate for operator adjustment to split between PZR and seals

Question 19

What happens to CVCS on SIS?

Answer 19

Letdown isolation closes

CCPs align to RWST

Question 20

How does PPZ P respond during a level transient?

Answer 20

P follows level, i.e., increasing level causes increasing P

Question 21

CVCS flow rate breakdown

Answer 21

75 letdown
CCP
  32 to RCPs (8 per pump)
  20 returns to RCS (5 per pump)
  12 returns to CVCS (3 per pump)
Total CCP = 32 + (75 - 20) = 87

Question 22

Excess letdown flow breakdown

Answer 22

20 gpm
For use when normal letdown is isolated
Allows seal injection
CCP flow of 32

Question 23

Purpose of bank overlap

Answer 23

Create a more even DRW

Question 24

Purpose of RILs

Answer 24

Maintain SDM
Limit REJ
Maintain acceptable peaking

Question 25

RIL alarms and responses

Answer 25

Lo - 10 steps above, borate

Lo-lo - At/below, emergency borate

Question 26

RMU modes and where they discharge

Answer 26

Auto - CCP suction
Dilute - VCT spray
Alt dilute - VCT spray and CCP suction
Borate - CCP suction
Emergency - CCP suction

Question 27

Does increase RMU flow increase rate of boration / dilution?

Answer 27

No since PZR level controller doesn’t change CCP flow. This will change the VCT level.

Question 28

What is the difference between a leak and a LOCA?

Answer 28

Whether or not the CCPs can keep up

Question 29

What are the options for responding to a RCS leak?

Answer 29

Within TS: start trending
Outside TS:
- if within 1 CCP, controlled shutdown
- beyond 1 CCP, trip and initiate SI