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NRC Review > Reactor Trips / Turbine Trips / SI Initiations > Flashcards

Reactor Trips / Turbine Trips / SI Initiations Flashcards

1
Q
  • Reactor Trips & SI Initiations*
    • *

What is the coincidence of the manual Rx Trip?

A

1 of 2 switches

  • Note:*
  • Switches located on CP005 and CP007*
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2
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the SR Flux - High Rx Trip?

A

1x105 cps [1/2]

Manual Block: ≥ P-6 (1x10-10 amps) [1/2]

Auto Block: ≥ P-10 (10%) [2/4]

Auto Unblock: < P-6 (1x10-10 amps) [2/2]

  • Note:*
  • P-10 driven off PR NIs and NOT RTP*
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3
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the IR Flux - High Rx Trip?

A

25% [1/2]
(IR amps equivalent)

Manual Block: ≥ P-10 (10% PR NIs) [2/4]

Auto Unblock: < P-10 (10% PR NIs) [3/4]

  • Note:*
  • P-10 driven off PR NIs and NOT RTP*
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4
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the PR Flux High - Low Rx Trip?

A

25% [2/4]

Manual Block: ≥ P-10 (10%) [2/4]

Auto Unblock: < P-10 (10%) [3/4]

  • Note:*
  • P-10 driven off PR NIs and NOT RTP*
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5
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the PR Flux High - High Rx Trip?

A

109% [2/4]

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6
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the PR Flux Rate - High Rx Trip?

A

5% RTP / 2 sec [2/4]

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7
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the OT∆T Rx Trip?

A
  • *114% RTP [2/4]**
  • (± Penalties)*
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8
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the PZR Pressure - Low Rx Trip?

A

1870 psig [2/4]

  • *Auto Blocked**: < P-7
  • (< P-10 (10%) [3/4] AND < P-13 (10% Impulse Pressure) [2/2])*
  • *Auto Unblocked**: ≥ P-7
  • (≥ P-10 (10%) [2/4] OR ≥ P-13 (10% Impulse Pressure) [1/2])*

  • Note:*
  • P-10 driven off PR NIs and NOT RTP*
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9
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the RCS Flow - Low Rx Trip?

A
  • Setpoint:*
  • *91.8%**
  • Coincidence:*
  • *< P-8: [2/3 on 2/4]**
  • (< 40% PR NIs) [3/4]*
  • *≥ P-8: [2/3 on 1/4]**
  • (≥ 40% PR NIs) [2/4]*
  • *Auto Blocked**: < P-7
  • (< P-10 (10%) [3/4] AND < P-13 (10% Impulse Pressure) [2/2])*
  • *Auto Unblocked**: ≥ P-7
  • (≥ P-10 (10%) [2/4] OR ≥ P-13 (10% Impulse Pressure) [1/2])*
  • Note:*
  • P-10 driven off PR NIs and NOT RTP*
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10
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the RCP UV (15 kV cubicle) Rx Trip?

A
  • *72.6% for 1.5 sec [2/4]**
  • (10,014 VAC)*

  • *Auto Blocked**: < P-7
  • (< P-10 (10%) [3/4] AND < P-13 (10% Impulse Pressure) [2/2])*
  • *Auto Unblocked**: ≥ P-7
  • (≥ P-10 (10%) [2/4] OR ≥ P-13 (10% Impulse Pressure) [1/2])*

  • Note:*
  • P-10 driven off PR NIs and NOT RTP*
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11
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the RCP 15 kV cubicle UF Rx Trip?

A

57.2 Hz [2/4]

Will also trip ALL RCPs (DNB Protection)

  • *Auto Blocked**: < P-7
  • (< P-10 (10%) [3/4] AND < P-13 (10% Impulse Pressure) [2/2])*
  • *Auto Unblocked**: ≥ P-7
  • (≥ P-10 (10%) [2/4] OR ≥ P-13 (10% Impulse Pressure) [1/2])*

  • Note:*
  • P-10 driven off PR NIs and NOT RTP*
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12
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the OP∆T Rx Trip?

A
  • *108% RTP [2/4]**
  • (- Penalties)*

Note:
Unlike OT∆T which has ± Penalties, OP∆T only has - Penalties.

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13
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the PZR Pressure - High Rx Trip?

A

2380 psig [2/4]

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14
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the PZR Level - High Rx Trip?

A

92% [2/4]

  • *Auto Blocked**: < P-7
  • (< P-10 (10%) [3/4] AND < P-13 (10% Impulse Pressure) [2/2])*
  • *Auto Unblocked**: ≥ P-7
  • (≥ P-10 (10%) [2/4] OR ≥ P-13 (10% Impulse Pressure) [1/2])*

  • Note:*
  • P-10 driven off PR NIs and NOT RTP*
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15
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the S/G Level - Low 2 Rx Trip?

A

20% [2/4 on 1/4]

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16
Q
  • Reactor Trips & SI Initiations*
    • *

What will cause a SI Initiation?

A
  • ≥ P-11:*
  • *PZR Pressure - Low [2/4]**
  • 1857 psig*
  • *Steam Pressure - Low [2/3 on 1/4]**
  • 735 psig*
  • No Permissives:*
  • *Containment Pressure - High [2/3]**
  • 3.0 psig*
  • *Manual [1/2]**

Manual Blocked: < P-11: PZR Pressure < 1985 psig [2/3]

Auto Unblocked: ≥ P-11: PZR Pressure ≥ 1985 psig [2/3]

  • Note:*
  • P-11 Block switches located on CP005
  • SI Manual Switches are located on CP001 and CP005
17
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the PZR Pressure - Low SI Initiation Signal?

A

1857 psig [2/4]

Manual Blocked: < P-11: PZR Pressure < 1985 psig [2/3]

Auto Unblocked: ≥ P-11: PZR Pressure ≥ 1985 psig [2/3]

  • Note:*
  • Block switches located on CP005*
18
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the Steam Pressure - Low SI Initiation Signal?

A

735 psig [2/3 on 1/4]

Manual Blocked: < P-11: PZR Pressure < 1985 psig [2/3]

Auto Unblocked: ≥ P-11: PZR Pressure ≥ 1985 psig [2/3]

  • Note:*
  • Block switches located on CP005*
20
Q
  • Reactor Trips & SI Initiations*
    • *

What will cause a logic cabinet urgent alarm Rx trip?

A
  • *Loose / removed circuit card**
  • (any except isolation boards)*
  • *Respective actuation train urgent alarm**
  • Actuation Cabinet “A” → Logic Cabinet “R”*
  • Actuation Cabinet “B” → Logic Cabinet “S”*

Associated bypass breaker closed AND Racked-In

Input Error Inhibit Sw. in “Inhibit”

  • *Switches NOT in “OFF”**
  • Logic Test Sw. ‘A’*
  • Permissive Test Sw.*
  • Memory Test Sw.*

Coincidence required is [2/2].

  • Note:*
  • Do not confuse input error inhibit sw. with multiplexer test sw. Both have an inhibit position.*
22
Q
  • Reactor Trips & SI Initiations*
    • *

What is the setpoint of the Containment Pressure - High SI Initiation Signal?

A

3.0 psig [2/3]

  • Note:*
  • Unlike PZR Pressure - Low and Steam Pressure - Low which can be blocked on P-11, Containment Pressure - High is active at all times.*
24
Q
  • Reactor Trips & SI Initiations*
    • *

What will cause an actuation train urgent alarm Rx trip?

A

Loss of AC power to safeguards actuation train

Actuation train in test

Safeguards test cabinet in test

Coincidence required is [2/3].

25
Q
  • Reactor Trips & SI Initiations*
    • *

What are the SSPS Rx trips?

A
  • *Logic Cabinet Urgent Alarm [2/2]**
  • Actuation Cabinet “A” → Logic Cabinet “R”*
  • Actuation Cabinet “B” → Logic Cabinet “S”*

Actuation Train Urgent Alarm [2/3]

Master Relay Defeat Sw.

Loss of both 15 VDC OR both 48 VDC in a logic train

26
Q
  • LOT 202.03 Main Turbine*
    • *

What will trip the turbine?

A

Electrical Overspeed (110%)

Mechanical Overspeed (111%)

Condenser Vacuum - Low (21.0”)

Thrust Bearing Wear (±40 mils)

P-14 (SGWL 87.5%)

P-16 (Rx Trip)

SI

Bearing Oil Pressure - Low (6 psig ± 1) [1/2 on 2/2]

Stator Cooling Water D/P - Low (19 psid) [2/3] [40 sec TC]

AMSAC

Generator Trip

Manual (Local/MCR)

NRC Review (7 decks)

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