Nuclear Instrumentation Rod Blocks and Scrams Flashcards

1
Q

When does the SRM Short Period alarm actuate?

A

When power is changing by a factor of E shorter than 50 seconds

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2
Q

How are SRM Rod Blocks and Scrams bypassed?

A

Mode Switch in RUN, or the SRM is bypassed

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3
Q

What is the purpose of the Shorting Links?

A

With the Shorting Links installed all SRM Scrams are bypassed.

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4
Q

What conditions would produce an SRM INOP signal?

A

1) SRM Mode Selector Switch not in OPERATE 2) High volts 3) Low volts 4)Card out of file

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5
Q

What SRM signals produce a Rod Block?

A

1) INOP 2) Downscale at 0.7 cps 3) <100 cps and detector not full in 4) Upscale at 1E5 cps

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6
Q

What is required to bypass the SRM Downscale signal that produces a Rod Block?

A

1) Both of the associated IRMs on range 3 or greater 2) Both of the associated IRMs on range 8 or greater

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7
Q

What is required to bypass the SRM <100 cps and detector not full in Rod Block?

A

1) Both of the associated IRMs on range 3 or greater 2) Both of the associated IRMs on range 8 or greater

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8
Q

What is required to bypass the SRM Upscale signal that produces a Rod Block?

A

Both of the associated IRMs on range 8 or greater

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9
Q

What SRM signals produce a Reactor Scram?

A

1) INOP 2) Hi Hi at 2E5 cps

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10
Q

How are IRM Rod Blocks and Scrams bypassed?

A

Mode switch in RUN, or the IRM is bypassed

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11
Q

What conditions would give an IRM INOP signal?

A

1) IRM Mode Selector Switch not in OPERATE 2) High volts 3) Low volts 4)Card out of file

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12
Q

What IRM signals produce a Rod Block?

A

1) INOP 2) Downscale at 5/125 3) Upscale 80/125 4) Detector not full in

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13
Q

What is required to bypass the IRM Downscale signal that produces a Rod Block?

A

The IRM Range Switch on range 1

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14
Q

What IRM signals produce a Reactor Scram?

A

1) INOP 2) Hi Hi 120/125

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15
Q

OPRMs produce Reactor Scram signals based on what three monitoring functions?

A

1) Period 2) Amplitude 3) Growth Rate

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16
Q

What is the only OPRM monitoring function that is required by Tech Specs?

17
Q

What conditions would give an APRM INOP signal?

A

1) Switch not in operate 2) High volts 3) Low volts 4) Card not in file 5) Flow card switch not in operate 6) Less than 14 LPRM inputs

18
Q

What APRM signals produce a Rod Block?

A

1) INOP 2) Downscale 3) Total Recirc Flow 4) Flow Bias Upscale 5) Neutron Upscale Fixed

19
Q

What is the APRM Rod Block Downscale setpoint?

A

Less than 4% Reactor Power

20
Q

What is the APRM Rod Block Total Recirc Flow setpoint?

A

Greater than 111% flow

21
Q

What is the APRM Rod Block Flow Bais Upscale setpoint?

A

Greater than .628 x Recirc Flow + 55% clamped at 108%

22
Q

What is the APRM Rod Block Neutron Upscale Fixed setpoint?

A

Greater than 12% Reactor Power

23
Q

What is required to bypass the APRM Rod Block Neutron Upscale Fixed signal?

A

Mode Switch in RUN

24
Q

What is required to bypass the APRM Rod Block Downscale, Total Recirc Flow, and Flow Bias Upscale signals?

A

Mode Switch NOT in RUN

25
What APRM signals produce a Reactor Scram signal?
1) INOP 2) Fixed Neutron Flux High 3) High Setdown 4) Flow Thermal Power High
26
What is the APRM Reactor Scram Fixed Neutron Flux High signal?
118% Reactor Power
27
What is the APRM Reactor Scram High Setdown signal?
15% Reactor Power
28
What is the APRM Reactor Scram Flow Thermal Power High signal?
Greater than .628 x Recirc Flow + 61% clamped at 111%
29
What is required to bypass the APRM Reactor Scram Fixed Neutron Flux High signal?
Mode Switch NOT in RUN
30
What is required to bypass the APRM Reactor Scram High Setdown signal?
Mode Switch in RUN
31
What is required to bypass the APRM Reactor Scram Flow Thermal Power High signal?
NEVER BYPASSED