Nuclear Power Engineering
Positron is a/an

Helium nucleus
Nucleus with one proton and one neutron
Electron with positive charge
Nucleus having two protons

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

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

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