Power Plant Engineering
A nuclear unit becoming critical means

It is generating power to rated capacity
It is capable of generating much more than rated capacity
There is danger of nuclear spread
Chain reaction that causes automatic splitting of the fuel nuclei has been established

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Power Plant Engineering
A pressurized water reactor employs pressurizes for the following application

To provide sub cooled water at high pressure
To maintain constant pressure in primary circuit under varying load
To increase pressure of water in primary circuit
To Supply high pressure steam

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Power Plant Engineering
Ferrite material is

The material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material
The most fissionable material
Basic raw material for nuclear plants
The basic fuel for nuclear paints

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