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Module 7 - CTMT Integrity > CTMT systems > Flashcards

CTMT systems Flashcards

1
Q

What is the tech spec temp limit of CTMT?

A

95 deg F

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2
Q

What’s the tech spec temp limit of Drywell?

A

135 deg F

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3
Q

What will cause water level in drywell to increase?

A

CTMT pressure goes up OR

vacuum is created in the drywell

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4
Q

What’s the purpose of the CTMT systems?

A

contain the steam that is released into the drywell following a LOCA and condense the steam in the suppression pool

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5
Q

What does the weir wall and the inside surface of the drywell form?

A

Vent annulus

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6
Q

What is used to maintain negative pressure of the Aux building

A

Normal - FHA fans

Accident - STBY gas

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7
Q

When are the gates required to be removed from the upper CTMT pool and why?

A

Modes 1,2,3 for SPMU

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8
Q

What makes up the secondary CTMT?

A

Aux building, FHA, and enclosure building

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9
Q

What’s the purpose of the drywell?

A

direct steam from LOCA into the suppression pool, and act as a shield for CTMT

Also as shielding for CTMT.

Also protects CTMT liner from missile hit and pipe whip

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10
Q

What does the drywell support the weight of?

A

Upper CTMT pools and refueling bridge

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11
Q

what is the purpose of the suppression pool vents?

A

Provide a vent path from drywell through suppression pool to CTMT

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12
Q

Purpose of the Reactor shield wall?

A

Reduce radiation levels in the drywell

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13
Q

What is the pressure/temp limit in CTMT? (design basis)

A

185 deg F and 15 psig

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14
Q

what is the pressure/temp limit of the drywell? (design basis)

A

330 deg F and 30 psig

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15
Q

what is the risk of losing drywell integrity?

A

Steam could bypass the suppression pool and ressurize CTMT and failure of CTMT

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16
Q

What pressure must be across the door in order to open to Airlock door?

Is this considered a high dp or a low dp?

A

2 psid across the door

Low DP

Module 7 - CTMT Integrity (9 decks)

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