is3_70 - from boiling by being maintained at a much higher...

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Radiological Emergency Management Independent Study Course 3-10 Types of Reactors There are two main types of commercial nuclear reactors used in power plants in the United States: O Boiling Water Reactors (BWRs). O Pressurized Water Reactors (PWRs). In Boiling Water Reactors (BWRs), water (primary coolant) is allowed to boil directly in the reactor core. The boiling water generates steam which is drawn away from the reactor and used to rotate the turbine, which in turn generates electricity via the generator. Even in non-emergency conditions this water may contain small amounts of radioactive fission products. In Pressurized Water Reactors (PWRs), the water (primary coolant) in the reactor core is prevented
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Unformatted text preview: from boiling by being maintained at a much higher pressure. Heat is removed using a steam generator . In a steam generator, the primary coolant flows through a series of metal tubes while secondary cooling water flows around the tubes. In this way, heat is transferred from the slightly radioactive primary coolant system to the nonradioactive secondary coolant system. The secondary coolant is maintained at a much lower pressure than the primary coolant. Thus, as the heat is transferred, the secondary coolant flashes to steam. This steam is then drawn from the steam generator and used to rotate the turbine generating electricity....
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This note was uploaded on 01/29/2010 for the course MPA mpa1 taught by Professor Scotts during the Spring '10 term at Acton School of Business.

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