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AF, SC, SGB/D, CD Demins > Condensate Demineralizers > Flashcards

Condensate Demineralizers Flashcards

0
Q

What leak rate are the demineralizers capable of handling?

A

1 gpm on a continuous basis

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1
Q

What is the purpose of the condensate demineralizer system?

A

Maintain proper condensate water chemistry

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2
Q

What does cation resin remove?

A

Cations

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3
Q

What does anion resin remove?

A

Anions

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4
Q

What is the term used to describe the release of unwanted contaminants?

A

Throwing

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5
Q

What indicates the relative attractiveness for one ionic species over another?

A

Selectivity coefficient

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6
Q

What principle states that the affinity of a resin for a species depends on the species concentration as well as it’s chemical behavior?

A

Mass action

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7
Q

What lies directly upstream of the cd demineralizers?

A

Discharge of the cd pumps

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8
Q

What does a high dP across a vessel indicate?

A

Clogged resin trap

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9
Q

What does a low dP across a vessel indicate?

A

Possible channeling

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10
Q

What is the water source that provides clean water for transferring, rinsing and cleaning the resin?

A

CST

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11
Q

What provides the motive force for transfer, cleaning and mixing the resin?

A

IA

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12
Q

What system cools the cd demin sample coolers?

A

WC normal chilled water

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13
Q

What system provides sulfuric acid for cation bed regeneration?

A

CI chlorine injection

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14
Q

What system provides the sodium hydroxide for anion bed regeneration?

A

CC chemical production system

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15
Q

What provides power to the pumps in the demin system?

A

NH

16
Q

Where is the condensate pumped upon indication of radioactive contamination in the low TDS sump

A

Liquid radwaste.

17
Q

Where is the low TDS sump normally pumped when no radiation is present?

A

CW canal

18
Q

Where is the CD demin high TDS sump normally pumped?

A

Chem waste neutralizing tank.

19
Q

Where are all of the CD demin components located?

A

100’ of the turbine building

20
Q

Where are the vessel inlet and outlet valve controlled from?

A

B07 or local control panel

21
Q

What happens to the vessel inlet valve switch is taken to OPEN and what happens if it is not held in that position until it fully opens?

A

A bypass valve around the inlet valve opens until a specific dP is reached at which point the inlet valve opens and the bypass closes.

If the switch is released before full open the valve will shut.

22
Q

How is resin added to the cation regen vessel?

A

Externally mounted resin addition hopper.

23
Q

What happens to the vent valve if the pressure switch interlock detects a low pressure at the inlet of the cation vessel?

A

The vent valve closes

24
Q

What prevent the acid day tank from over flowing?

A

The day tank fill valve has an interlock that closes on a hi-hi level in the tank.

25
Q

Describe the acid pumps.

A

Motor driven diaphragm pumps that take suction on the acid day tank
They have variable STROKE

26
Q

Describe the caustic pumps.

A

Two pumps that are motor driven centrifugal that supply from the caustic day tank to the regen vessel

27
Q

What happens to the acid and caustic pumps on a low day tank level?

A

The pumps stop automatically

28
Q

Describe the transfer pumps.

A

Take suction on the CST and supply water for various resin transfer operations

29
Q

What is the purpose of the waste collection tank?

A

The waste from the regen process is sent to this tank before it goes to the applicable sump.

30
Q

Where is the waste collection tank located?

A

100’ turbine building

31
Q

Describe the turbine building acid transfer pumps.

A

2, 100% capacity

Provides to day tank and cwnt

32
Q

What prevents the acid transfer pumps from over pressurization?

A

A bleed hole is provided in the discharge check valves.

33
Q

Where are the turbine building acid storage tanks located?

A

200’ plant north of the turbine building.

34
Q

What system is used to provide pressure to aid in acid transfer from shipping truck?

A

IA

AF, SC, SGB/D, CD Demins (4 decks)

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