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Rev. J Setpoints > Rx Trip > Flashcards

Rx Trip Flashcards

1
Q

For the Reactor Coolant Flow Rate - Low 2 Reactor Trip, what is the set point and coincidence?

A

90% (2/4 on 1/2) Hot Legs

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2
Q

For the Pressurizer Pressure - High 2 Reactor Trip, what is the set point and coincidence?

A

2420.3 psig (2/4)

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3
Q

For the Power Range Flux - High (High) Reactor Trip, what is the set point and coincidence?

A

109 % RTP (2/4)

  • Note:*
  • C-2 /// PR Flux ≥103 % RTP (2/4)*
  • Blocks auto / manual Rod withdrawal for:*
  • M Banks
  • AO Banks
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4
Q

When are the DAS Rx trips applicable?

A

Mode 1

TRM 3.3.1 DAS Automatic Actuation

Located in Note

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5
Q

The Source Range Flux - High reactor trip is applicable in what mode(s)?

A

Mode 2 w/ IR neutron flux < P-6

Mode 3 - 5:

  • PLS capable of rod withdrawal
    OR
  • ≥ 1 rod not fully inserted

​LCO 3.3.2 RTS Source Range Instrumentation

P-6 /// Divisional IR ≥ 1 E-5% RTP

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6
Q

What is the purpose / function of the DAS reactor trips?

A

Satisfies 10 CFR 50.62 (ATWS Rule)

Provides margin in the PRA

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7
Q

For the Intermediate Range Flux - High Reactor Trip, what is the set point and coincidence?

A

25 % RTP (2/4)

Note:

  • C-1 /// IR Flux ≥15 % RTP (2/4)*
  • Blocks auto / manual rod withdrawal for:*
  • M Banks
  • AO Banks
  • Manual Block: ≥ P-10*
  • Auto Unblock: < P-10*
    • *

P-10 /// Divisional PR ≥ 10 % RTP

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8
Q

For the Power Range Positive Flux Rate - High Reactor Trip, what is the set point and coincidence?

A

12 % RTP w/ 60 sec TC (2/4)

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9
Q

The Intermediate Range Flux - High reactor trip is applicable in what mode(s)?

A

Mode 1 w/ PR Neutron Flux < P-10

Mode 2

LCO 3.3.3 RTS IR Instrumentation

P-10 /// Divisional PR ≥ 10% RTP

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10
Q

Which reactor trip(s) protect the plant from an uncontrolled reactivity accident?

A

Low

Source Range Flux - High (< P-6)

  • 1x105 CPS (2/4)*
    • *

Mid

Intermediate Range Flux - High (≥ P-6 / < P-10)

25 % RTP (2/4)

Power Range Flux - High (Low) (≥ P-6 / < P-10)

  • 25 % RTP (2/4)*
    • *

High

Power Range Flux - High (High) (≥ P-10)

109 % RTP (2/4)

Power Range Positive Flux Rate (High) (≥ P-10)

  • 12% RTP w/ 60 sec TC*
    • *

P-6 /// Divisional IR ≥ 1 E-5 % RTP

P-10 /// Divisional PR ≥ 10 % RTP

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11
Q

What are all the PMS Reactor Trips?

A

Power:

  1. Source Range Flux - High
  2. Intermediate Range Flux - High
  3. Power Range Flux - High (Low)
  4. Power Range Flux - High (High)
  5. Power Range Positive Flux Rate - High

RCP / Flow

  1. RCP Bearing Water Temp - High 2
  2. RCP Speed - Low 2
  3. Reactor Coolant Flow Rate - Low 2

Calorimetric Comparison

  1. Overtemperature ∆T (OT∆T)
  2. Overpower ∆T (OP∆T)

Pressurizer

  1. Pressurizer Pressure - Low 2
  2. Pressurizer Pressure - High 2
  3. Pressurizer Water Level - High 3

Steam Generator

  1. SG NR Water Level - Low 2
  2. SG NR Water Level - High 3

System / Manual

  • Safeguards (Manual / Auto)
  • ADS (Manual / Auto)
  • CMT (Manual / Auto)
  • PRHR (Manual / Auto)
  • Manual
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12
Q

Which PMS Reactor Trips are interlocked with P-9 (Divisional Tavg ≥ 200°F)?

A

SG NR Water Level - Low 2

Manual Block < P-9 / Auto Unblock ≥ P-9

21 % (2/4 on 1/2)

P-9 /// Divisional Tavg ≥ 200°F

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13
Q

For the Source Range Flux - High Reactor Trip, what is the set point and coincidence?

A

1 E5 CPS (2/4)

Manual Block ≥ P-6

Auto Block ≥ P-10

Auto Unblock < P-6

P-6 /// Divisional IR ≥ 1 E-5 % RTP

P-10 /// Division PR ≥ 10 % RTP

  • Note:*
  • Blocking Source Range Flux - High de-energizes source range nuclear instrument.*
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14
Q

For the Power Range Flux - High (Low Setpoint) Reactor Trip, what is the set point and coincidence?

A

25 % RTP (2/4)

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15
Q

For the SG WR Level - Low DAS Reactor Trip, what is the set point and coincidence?

A

26 % (1/2 on 2/2) TD

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16
Q

Which PMS Reactor Trips are interlocked with P-11 (Divisional PZR pressure ≤ 1970 psig)?

A

SG NR Water Level - High 3

(Manual Block ≤ P-11 / Auto Unblock > P-11)

P-11 is used to allow rod testing in cold wet layup

P-11 /// Divisional Pzr Pressure ≤ 1970 psig

17
Q

For the Pressurizer Water Level - High 3 Reactor Trip, what is the set point and coincidence?

A

71 % (2/4)

18
Q

What are all the DAS Reactor Trips?

A

PZR Level - Low

SG WR Level - Low (TD)

Hot Leg Temperature - High

Manual

19
Q

For the Pressurizer Pressure - Low 2 Reactor Trip, what is the set point and coincidence?

A

1915 psig (2/4)

20
Q

For the SG NR Water Level - Low 2 Reactor Trip, what is the set point and coincidence?

A

21 % (2/4 on 1/2)

21
Q

With regards to how the reactor is tripped, how does the PMS and DAS trips differ?

A

PMS opens the reactor trip breakers

DAS opens rod control MG set field breakers

  • Note:*
  • DAS also trips the turbine on a TD*
22
Q

For the RCP Speed - Low Reactor Trip, what is the set point and coincidence?

A

91 % (2/4)

23
Q

For the RCP Bearing Water Temp. - High 2 Reactor Trip, what is the set point and coincidence?

A

185ºF (2/4 on 1/4)

24
Q

Which reactor trip(s) protect the integrity of the fuel?

A

Overpower ∆T (OP∆T)

25
Q

For the SG NR Water Level - High 3 Reactor Trip, what is the set point and coincidence?

A

82 % (2/4 on 1/2)

26
Q

Which reactor trip(s) protect the plant from reaching DNB?

A

RCP bearing water temperature - High 2

Reactor coolant flow rate - Low 2

RCP Speed - Low 2

Overtemperature ∆T (OT∆T)

Pressurizer Pressure - Low 2

27
Q

For the Overpower ∆T (OP∆T) Reactor Trip, what is the set point and coincidence?

A

q∆T (calorimetric) ≥ OP∆T (2/4)

≈109 % RTP

  • Note:*
  • C-4 /// OP∆T ≥ 1% below Rx Trip*
  • Blocks auto / manual rod withdrawal for:*
  • M Banks
  • AO Banks

Actuates Turbine Runback (Clears when C-4 clears)

28
Q

What interlocks are associated with the Source Range Flux - High PMS Reactor Trip?

A

Manual Block ≥ P-6

Auto Block ≥ P-10

Auto Unblock < P-6

P-6 /// Divisional IR ≥ 1 E-5 % RTP

P-10 /// Divisional PR ≥ 10 % RTP

  • Note:*
  • Blocking Trip also de-energizes source range nuclear instruments*
29
Q

For the Overtemperature ∆T (OT∆T) Reactor Trip, what is the set point and coincidence?

A

q∆T (Calorimetric) ≥ OT∆T (2/4)

≈ 119% RTP ± penalties

< 5.6% COLR Figure 6 limit

  • Note:*
  • C-3 /// OT∆T ≥ 1 % below Rx Trip*
  • Blocks auto / manual Rod withdrawal for:*
  • M Banks
  • AO Banks

Actuates Turbine runback (Clears when C-3 clears)

30
Q

For the Hot Leg Temperature - High DAS Reactor Trip, what is the set point and coincidence?

A

643 °F (2/2)

31
Q

For the PZR Level - Low DAS Reactor Trip, what is the set point and coincidence?

A

7.5 % (2/2)

32
Q

Which PMS Reactor Trips are interlocked with P-10 (Divisional PR ≥ 10%)?

A

Low Power

  1. Source Range Flux - High (Auto Block ≥ P-10)
  2. Intermediate Range Flux - High (Manual Block ≥ P-10 / Auto Unblock < P-10)
  3. Power Range Flux - High (Low) (Manual Block ≥ P-10 / Auto Unblock < P-10)

High Power

  1. Pressurizer Pressure - Low 2 (Auto Block < P-10 / Auto Unblock ≥ P-10)
  2. Pressurizer Water Level - High 3 (Auto Block < P-10 / Auto Unblock ≥ P-10)
  3. Reactor Coolant Flow Rate - Low 2 (Auto Block < P-10 / Auto Unblock ≥ P-10)
  4. Reactor Coolant Pump Speed - Low 2 (Auto Block < P-10 / Auto Unblock ≥ P-10)

P-10 /// Divisional PR ≥ 10 % RTP

Rev. J Setpoints (2 decks)

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