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What does the top of the pressurizer in pressurized water reactor consists of at primary system pressure?

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What does the top of the pressurizer in pressurized water reactor consists of at primary system pressure?

(a) Steam

(b) Air

(c) Water

(d) Fluids

The question was posed to me in an internship interview.

The above asked question is from Types of Nuclear Reactor & Nuclear Waste topic in division Nuclear Power Plant of Energy Engineering

1 Answer

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Best answer
Correct choice is (a) Steam

The best I can explain: The pressurizer is a pressure vessel with a heater at the bottom and water spray at the top. The top of the pressurizer is filled with steam at primary system pressure. If the primary loop pressure drops, the heater is energized to increase the steam content in the pressurizer and thus increases the pressure of primary cooling system.

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