Start-up Annunciators Flashcards

1
Q

What will cause the SR or IR Level Trip Bypass alarm, Annunciator 110 (210) drop 1?

A

Operator takes level trip bypass switch on the drawer to bypass. (Allows instrument fuse removal)

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2
Q

What will cause the SR Hi Flux at Shutdown alarm? Annunciator 110 (210) Drop 3

A

With it set properly (3x stable shutdown count rate or 1/2 decade above background) any increase to that set point will cause the alarm.

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3
Q

What else will happen if you receive the SR Hi flux at Shutdown alarm?

A

Containment evacuation alarm will sound

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4
Q

What will cause the SR Hi Flux at shutdown alarm blocked alarm? Annunciator 110 (210) Drop 4

A

Startup procedure requires operator to place the block switches in the blocked position, causing the alarm.

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5
Q

What will cause the PR Upper Detector Flux Deviation alarm? Annunciator 110 (210) drop 16

A

It will be standing during startup bc all PR detectors are below 50% power.

Above 50% power, +/- 2% deviation from the avg of all upper detectors will bring it in.

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6
Q

What is the probable cause of a PR upper detector flux deviation alarm?

A

Rod mis-alignment

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7
Q

What is the cause of the PR Lower detector flux deviation alarm? Annunciator 110 (210) Drop 17

A

Probably cause is rod mis-alignment.

Standing at startup below 50% power

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8
Q

When will The Rod Dropped or Rod Bottom alarm clear? Annunciator 110 (210) Drop 22

A

Clears with withdrawal of control bank “A” at 20 steals as indicated by IRPI.

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9
Q

What does the Rod Dropped or Rod Bottom alarm tell us?

A

If any SD Banks or CB A drops to less than 20 steps.

Or for CB B, C, D, it is armed after their banks are above 35 steps as indicated by the P/A. It will then tell you if a rod drops below 20 steps.

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10
Q

What causes the Rod Sequence Violation alarm? Annunciator 110 (210) Drop 29

A

Alarm will be standing during startup.

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11
Q

What must we do during startup because of the Standing Rod Sequence Violation alarm?

A

Record individual rod IRPI Positions as compared to demand during startup

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12
Q

When does the Rod Bank A Low Low alarm Clear? Annunciator 110 (210) Drop 36

A

When Control Bank A gets to 215 steps as indicated by bank position

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13
Q

When does the Rod Bank A Low alarm clear? Annunciator 110 (210) Drop 31

A

When Control Bank A gets to 225 steals as indicated by bank position

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14
Q

When does Rod Bank B Low Low alarm Clear? Annunciator 110 (210) Drop 37

A

When Control Bank B gets to 215 Steps

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15
Q

When does Rod Bank B Low Alarm Clear? Annunciator 110 (210) Drop 32

A

When Control Bank B gets to 225 steps as indicated by bank position

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16
Q

When does Rod Bank C Low Low alarm clear? Annunciator 110 (210) Drop 38

A

When control bank C gets to 128 steps

17
Q

When does the Rod Bank C Low alarm Clear? Annunciator 110 (210) Drop 33

A

When Control Bank C is at 138 Steps

18
Q

When Does Rod Bank D Low Low alarm Clear? Annunciator 110 (210) Drop 39

A

At 0 Steps on control bank D

At the same time control bank C clears

19
Q

When does the Rod Bank D Low alarm clear? Annunciator 110 (210) Drop 34

A

When Control Bank D is at 10 steps

Clears at the same time as Rod Bank C Low)

20
Q

Why is the Reactor Delta Flux Deviation alarm standing during startup and what does it do? Annunciator 110 (210) Drop 44

A

Alarm is standing bc power is < 15%

Alarm monitors AFD

21
Q

When would the Loops 1,2,3,4 Tavg Low alarm clear during startup? Annunciator 111 (211) Drop 1

A

Should not clear unless temp gets above 554*F