Power Plant Engineering
The mass number of a substance represents the sum of total number of

Protons and neutrons in an atom
Neutrons and electrons in an atom
Protons and electrons in an atom
Protons and neutrons in a nucleus

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

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