The coolant used in boiling water reactor is

Question

Question

This question was previously asked in

BPSC AE Paper 5 (Mechanical) 2012 Official Paper

Answer 1

Explanation:

In Boiling Water Reactor (BWR), water serves the triple functions of coolant, moderator, and working fluid.
In this case, the steam flow to the turbine is produced directly in the reactor core.
In the case of BWR because of steam being generated at the reactor itself, there is no need for a heat exchanger.
Steam is separated and dried by mechanical devices located in the upper part of the pressure vessel assembly.
That’s why, water serves the triple functions of coolant, moderator, and working fluid.
So, the coolant used in a boiling water reactor is a mixture of water and steam

Fig shows a schematic diagram of the boiling water reactor power plant.

F3 S.C 26.8.20 Pallavi D1 F3 S.C 26.8.20 Pallavi D2