Reactor Trips Flashcards

1
Q

SR High Flux Trip

Coincidnet, Setpoint, block?

A

1/2 SR @ 10^5 CPS

Can be blocked with P-6
Autoblocked with P-10

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2
Q

Intermediate High Flux Trip

Coincident, setpoint, block?

A

1/2 IR @ 25% CE (curent equivalent)

Can be manually blocked when greater than P-10

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3
Q

Power Range High Flux Low set point Trip

Coincident, setpoint, block?

A

2/4 PR @ 24%
Can be manually blocked when greater than P-10

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4
Q

Power Range High Flux High set point Trip

Coincident, setpiont, block?

A

2/4 PR @ 108%

Cannot be blocked

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5
Q

High Pressure PZR trip

Coincident, setpoint, block?

A

2/3 Pressure xmitters @ 2376psig

cannot be blocked

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6
Q

Low Pressure PZR trip

Coincident, setpoint, block?

A

2/3 Pressure xmitters @ 1844

Enable/Disable with P-7

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7
Q

High PZR water Level

Coinicdent, setpoint, block?

A

2/3 Level xmitters @ 91%
Enable/Disable with P-7

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8
Q

Low Reactor Coolant Flow Trip

Coincident, setpoint, block?

A

Above P-8 (40%) 2/3 flow xmitters in 1/3 loops @ 94.68% flow
Above P-7 (10%) 2/3 flow xmitters in 2/3 loops @ 94.68% flow

Auto blocks below P-7

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9
Q

RCP Breaker Open Trip

Coincident, setpoint, block?

A

Above P-8 1/3 breakers open
Above P-7 2/3 breakers open

Enable/disabled with P-7

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10
Q

RCP Bus UV

Coincident, setpoint, block?

A

2/3 UV on RCP breakers @ 3120V

Enable/Disable with P-7

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11
Q

RCP Bus UF

coincident, setpoint, block?

A

2/3 RCP busses @ 58.2Hz
Enable/Disable with P-7
(Trips open all RCP breakers, Indirect Reactor Trip)

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12
Q

S/G Low-Low water level

coincident, setpoint

A

2/3 NR level xmitters on 1/3 S/G @ 16%

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13
Q

Turbine Trip

coincident, setpoint, block?

A

2/3 Low EH oil pressure @ 800psig
OR
2/2 Stop Valves Close

Enable/Disable with P-8

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14
Q

SI signals

A

1.Manual 1/2 pushbuttons
2.Low PZR pressure 2/3 @1715psig
3. Hi Steam Line D/P 2/3 @ on 1/3 lines @100psig
4. Hi CV Pressure 2/3 on 2/2 groups @ 4psig
5. Hi-Hi CV pressure 2/3 on 2/2 groups @ 10psig
6. Hi steam line flow with Low Tavg or Low Steam Line Pressure

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15
Q

OT▲T

A

Variable,2/3 Loop ▲T at setpoint

2% below setpoint causes runback

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16
Q

OP▲T

A

variable, 2/3 Loops at ▲T setpoint

1% below setpoint causes runback

17
Q

What feeds OT▲T? And what does it protect from?

A

Tavg/Press/▲I
Protects from DNB

18
Q

What feeds OP▲T?

A

Tavg/Tavgsec/▲I
Protects from over power (KW/ft)

19
Q

If Tavg goes up what does it do to the set point of OT▲T?

A

Setpoint lowers

20
Q

If Pressure goes up what does it do to the set point OT▲T?

A

Setpoint rises

21
Q

What happens to the setpoint of OP▲T if Tavg goes up or down?

A
  • Tavg goes up, setpoint lowers
  • Tavg goes down, setpoint doesnt change
22
Q

Runback is how long and then waits how long? what power change?

A

1.5s runback, wait 28.5s
5% power drop

23
Q

RTBs have:

A

UV coils and Shunt Trip coils

24
Q

RTB bypasses have:

A

Only UV coils