A boiling water reactor system makes use of__________________?
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Answer: B. direct cycle of coolant system
Explanation
A boiling water reactor uses a direct cycle coolant system where water is boiled directly in the reactor core. The generated steam travels directly from the reactor pressure vessel to drive the primary steam turbine generator. This direct configuration eliminates the need for an external steam generator to transfer heat between separate coolant loops. Nuclear reactor cooling systems are categorized by how thermal energy is transported from the core to the power conversion unit. In a direct cycle boiling water reactor, the reactor core functions simultaneously as a nuclear heat source and a steam boiler. Feedwater pumps return condensed steam from the turbine condenser directly back into the lower section of the reactor vessel.
Option A is incorrect because a separate conventional boiler is not used when water boils internally within the reactor vessel. Option C describes a pressurized water reactor layout featuring isolated primary and secondary coolant loops. Options D and E do not accurately designate the specific direct coolant cycle classification used in boiling water reactors.
- Subject
- Engineering
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- Mechanical Engineering
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- Difficulty
- medium
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