Soluble Poison Flashcards

1
Q

What is the basis for the BAAT?

A

Quantity of the BAAT is sufficient to borate RCS to 1% S/D margin in cold condition (200 degrees F) at worse time in core life with rod stuck out and xenon decay.

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2
Q

What terminates batch feed?

A
  • CV-1250 (Batch controller outlet) manualy closed
  • When reaches batch size or stop is depressed
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3
Q

What satisfies feed and bleed permissives?

A
  • MU tank > 18”
  • Grp 6 > 95% or safety groups fully withdrawn and either Grp 5 < 80% or safety rods out limit in bypass
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4
Q

What requirements are needed to meet BAAT TRM?

A
  • BAAT at required volume based on graph
  • > 10 degrees F above crystalization temperature
  • flow path from BAAT to MU system and > 10 degrees above crystalization
  • One boric acid pump
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5
Q

What is the admin limit for S/D margin?

A

-1.5 % delta K/K

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6
Q

What are the limits for the boric acid pumps?

A
  • 30 seconds max time at shutoff head
  • min flow is 2.5 gpm
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7
Q

What are the power sources for boric acid pumps?

A

B-55

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8
Q

Why is CV-1249 only opened 20% when batching acid only?

A

Due to flow inaccuracies

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9
Q

What light comes on the batch controller when batch reaches 20 gallons left?

A

Pre-shutdown light and CV-1249 closes to 5%

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