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.JS ZZ LOIT CWS Systems 2018 > CO: Control Oil > Flashcards

CO: Control Oil Flashcards

1
Q

Which valves in the Main Turbine System does CO operate?

A

Control Valves
Stop Valves
Intercept Valves

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2
Q

How many pumps does the CO System have? How many are normally running?

A

2

1 running, 1 in standby

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3
Q

What is normal discharge pressure for a CO pump?

A

1600 psig

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4
Q

At what pressure will the standby CO pump start?

A

1300 psig as long as its not in PULL-TO-LOCK

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5
Q

How does a CO pump get an amber Control Room light?

A

Auto start with the pump originally ‘Green Flagged’

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6
Q

How do the CO pumps maintain a constant discharge pressure with changing system demand?

A

They vary their pump stroke on system demand

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7
Q

How is cooling and lubrication supplied to the CO pumps?

A

Via a chain driven aux pump

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8
Q

When do the CO pump discharge filters alarm?

A

100 psid

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9
Q

What temperature is the CO reservoir maintained?

A

> 85F

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10
Q

How many inches in the reservoir is 1 barrel?

A

4”

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11
Q

How many accumulators does the CO system have?

A

4

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12
Q

What are the CO accumulators charged with? To what pressure?

A

N2

1000 psig

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13
Q

What is the capacity of the CO system accumulators?

A

200% for transients

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14
Q

How many coolers does the CO system have? What cools them?

A

2

TC

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15
Q

What is the purpose of the Fullers Earth Filters?

A

They maintain the pH of the oil neutral by absorbing water and acids.

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16
Q

What is FCV-27 in the CO System?

A

Its the key-locked throttle valve that controls flow to the Fullers Earth Filters

17
Q

How is the standby CO pump test performed?

A

HV-29 manually relieves system pressure on an isolated section of the supply header to start the standby pump. Performed locally.

18
Q

What Main Turbine Trips are associated with the CO System?

A

1100 psig CO header pressure on a 2/3 logic will trip the turbine.
Alarm and Standby pump start at 1300 psig

19
Q

What Control Room indication do you have for CO?

A

Header Pressure

.JS ZZ LOIT CWS Systems 2018 (35 decks)

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