Nuclear Power Engineering
Pressure in a Pressurised Water Reactor (PWR) is used for

None of these
Maintaining constant pressure in the primary cooling circuit under varying loads
Pressurising the water in the primary coolant circuit
Superheating the steam

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Nuclear Power Engineering
Secondary cooling circuit is a must in molten sodium cooled fast breeder reactor for

Faster heat removal rate from the core
Avoiding the mixing of water with radioactive sodium, as it may cause explosion
Achieving high degree of superheat in the steam
Lowering the coolant circulation pressure

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