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In a nuclear power station using boiling water reactor, water is used as
- a)a moderator but not as a coolant
- b)a coolant but not as a moderator
- c)both moderator and coolant
- d)neither moderator nor coolant
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
In a nuclear power station using boiling water reactor, water is used ...
Boiling Water Reactor in Nuclear Power Station:
A boiling water reactor (BWR) is a type of nuclear reactor that uses water as both a coolant and a moderator. In a BWR, the reactor core heats up water, which then boils and turns into steam. The steam is used to turn turbines, which generate electricity.
Function of Water in BWR:
Water plays two important roles in a BWR: it acts as a coolant and a moderator.
- Coolant: Water removes heat from the reactor core and carries it away, preventing the fuel rods from overheating and melting.
- Moderator: Water slows down neutrons produced by the fission of uranium atoms, allowing them to more easily collide with other uranium atoms and sustain the chain reaction.
Advantages of Water as Moderator and Coolant:
Using water as both a coolant and a moderator has several advantages.
- Efficiency: By using one substance for both functions, a BWR can be more efficient and compact than other types of reactors.
- Safety: Water is an excellent coolant, because it absorbs a lot of heat for every degree it heats up. This means that it can carry away a lot of heat from the reactor core without getting too hot itself.
- Control: Water also acts as a control mechanism, because it can be used to moderate the reaction rate by adjusting the water flow.
Conclusion:
In conclusion, water is used as both a moderator and a coolant in a boiling water reactor. This dual function allows for greater efficiency, safety, and control in the nuclear power plant.
A boiling water reactor (BWR) is a type of nuclear reactor that uses water as both a coolant and a moderator. In a BWR, the reactor core heats up water, which then boils and turns into steam. The steam is used to turn turbines, which generate electricity.
Function of Water in BWR:
Water plays two important roles in a BWR: it acts as a coolant and a moderator.
- Coolant: Water removes heat from the reactor core and carries it away, preventing the fuel rods from overheating and melting.
- Moderator: Water slows down neutrons produced by the fission of uranium atoms, allowing them to more easily collide with other uranium atoms and sustain the chain reaction.
Advantages of Water as Moderator and Coolant:
Using water as both a coolant and a moderator has several advantages.
- Efficiency: By using one substance for both functions, a BWR can be more efficient and compact than other types of reactors.
- Safety: Water is an excellent coolant, because it absorbs a lot of heat for every degree it heats up. This means that it can carry away a lot of heat from the reactor core without getting too hot itself.
- Control: Water also acts as a control mechanism, because it can be used to moderate the reaction rate by adjusting the water flow.
Conclusion:
In conclusion, water is used as both a moderator and a coolant in a boiling water reactor. This dual function allows for greater efficiency, safety, and control in the nuclear power plant.
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