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ZZ LOIT CWS Systems 2018 > RPS: Reactor Protection System > Flashcards

RPS: Reactor Protection System Flashcards

1
Q

What is the RRS design basis?

A

Load Rejection of any magnitude
10% step change
5%/min ramp change

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2
Q

What does NNN-D12 provide for the RRS?

A

Power to RRS overall
Hot Leg instruments (Loop 1 and Loop 2)
Control Channel 2

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3
Q

What happens to the RRS if NNN-D12 is lost?

A 
RRS loses power
No input to CEDMCS = no auto rod control
Tave signal to PLCS fails low (33%-lose letdown)
Lose power to both Th instruments
Lose power to TLI #2
Lose power to Control Channel #2
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4
Q

What does NNN-D11 provide for RRS?

A

Cold Leg instruments (Loop 1 and Loop 2)

Control Channel 1

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5
Q

What happens to the RRS if NNN-D11 is lost?

A

Lose power to both Tc instruments
Lose power to TLI #1
Lose power to Control Channel #1
You’ll get an AMI if selected to Average

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6
Q

How can you tell which Tave inputs are being used by the RRS in the Control Room?

A

Lights on B05 - if both are on the average of the Tave’s is being used

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7
Q

What is used by the RRS to develop Tref?

A

TLI - B06 1st stage pressure is not the input to RRS

Tref = 564F to 587F

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8
Q

Where can you read the two first stage pressure instruments (MTN-PT-11A/B) that input into the RRS for TLI?

A

At the RRS Test Cabinet

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9
Q

What is the TLI range for RRS?

A

0% - 125%

RRS can only use a 100% reading though. This results in a max Tref of 587F

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10
Q

How is the Temperature Error for the RRS generated?

A

Tave - Tref = Et

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11
Q

What function does the Lag Network serve for the RRS?

A

Gives higher amplification to a parameter that is rapidly changing. Adds stability to the temperature control loop

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12
Q

What Total Error in the RRS will generate a low insertion demand?

A

+ 3F

Resets at + 2.84F

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13
Q

What Total Error in the RRS will generate a withdraw demand?

A
  • 3F

Resets at - 2.84F

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14
Q

What Total Error in the RRS will generate a high insertion demand?

A

+ 4.53F

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15
Q

What Total Error in the RRS will generate a high withdraw demand?

A
  • 4.53F

However, rods will not withdraw in Auto at the high rate.

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16
Q

When reading a voltage at the RRS Test Panel, what must be done before selecting the desired input?

A

You must push the “Test Probe” button to verify the voltmeter reads zero.

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17
Q

What happens in RRS if Tc fails HIGH while selected to AVERAGE?

A 
AWP
AMI
PLCS Setpoint to 52.6%
RC Loop Temp HI
Tave-Tref Hi-Lo
18
Q

What happens in RRS if Tc fails HIGH while selected to the affected channel?

A 
AWP
Hi Rate Insertion Demand - rods go in if in AS
PLCS Setpoint to 52.6%
Possible Rx Trip on Low PZR Pressure
Possible Rx Trip on Low SG Pressure
Possible SIAS
RC Loop Temp HI
Tave-Tref Hi-Lo
19
Q

What happens in RRS if Tc fails HIGH while selected to the unaffected channel?

A

AWP

RC Loop Temp HI

20
Q

What happens in RRS if Tc fails LOW while selected to AVERAGE?

A

Tave-Tref Hi-Lo
AMI
PLCS Setpoint to 38%

21
Q

What happens in RRS if Tc fails LOW while selected to the affected channel?

A

Tave-Tref Hi-Lo
PLCS Setpoint to 33%
High Withdraw Demand - at 100% usually ARO

22
Q

What happens in RRS if Tc fails LOW while selected to the unaffected channel?

A

Light on the RRS Test Panel

23
Q

What happens in RRS if Th fails HIGH while selected to AVERAGE?

A 
Tave-Tref Hi-Lo
RC Loop Temp HI
AWP
AMI
PLCS Setpoint to 52.6%
24
Q

What happens in RRS if Th fails HIGH while selected to the affected channel?

A 
Tave-Tref Hi-Lo
RC Loop Temp HI
AWP
High Insert Demand - rods go in if in AS
PLCS Setpoint to 52.6%
Possible Rx Trip on Low PZR Pressure
Possible Rx Trip on Low SG Pressure
Possible SIAS
25
Q

What happens in RRS if Th fails HIGH while selected to the unaffected channel?

A

RC Loop Temp HI

Light on the RRS Test Panel

26
Q

What happens in RRS if Th fails LOW while selected to AVERAGE?

A

Tave-Tref Hi-Lo
AMI
PLCS Setpoint to 33%

27
Q

What happens in RRS if Th fails LOW while selected to the affected channel?

A

Tave-Tref Hi-Lo
PLCS Setpoint to 33%
High Withdraw Demand - at 100% usually ARO

28
Q

What happens in RRS if Th fails LOW while selected to the unaffected channel?

A

Light on the RRS Test Panel

29
Q

What happens in RRS if TLI fails HIGH while selected to AVERAGE?

A

Tave-Tref Hi-Lo
AMI
Light on the RRS Test Panel

30
Q

What happens in RRS if TLI fails HIGH while selected to the affected channel?

A

Tave-Tref Hi-Lo

Withdraw Demand - at 100% usually ARO

31
Q

What happens in RRS if TLI fails HIGH while selected to the unaffected channel?

A

Light on the RRS Test Panel

32
Q

What happens in RRS if TLI fails LOW while selected to AVERAGE?

A

Tave-Tref Hi-Lo
AWP
AMI
Light on the RRS Test Panel

33
Q

What happens in RRS if TLI fails LOW while selected to the affected channel?

A 
Tave-Tref Hi-Lo
AWP
High Insert Demand - rods go in if in AS
Possible Rx Trip on Low PZR Pressure
Possible Rx Trip on Low SG Pressure
Possible SIAS
34
Q

What happens in RRS if TLI fails LOW while selected to the unaffected channel?

A

Light on the RRS Test Panel

35
Q

What happens in RRS if a Control Channel Power fails HIGH while selected to AVERAGE?

A

Light on the RRS Test Panel

AMI

36
Q

What happens in RRS if a Control Channel Power fails HIGH while selected to the affected detector?

A

Light on the RRS Test Panel

37
Q

What happens in RRS if a Control Channel Power fails HIGH while selected to the unaffected detector?

A

Light on the RRS Test Panel

38
Q

What happens in RRS if a Control Channel Power fails LOW while selected to AVERAGE?

A

Light on the RRS Test Panel

AMI

39
Q

What happens in RRS if a Control Channel Power fails LOW while selected to the affected detector?

A

Light on the RRS Test Panel

AMI

40
Q

What happens in RRS if a Control Channel Power fails LOW while selected to the unaffected detector?

A

Light on the RRS Test Panel

ZZ LOIT CWS Systems 2018 (35 decks)

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