is3_61 - Unit 3 Nuclear Power Plant Accidents In this unit...

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Unformatted text preview: Unit 3 Nuclear Power Plant Accidents In this unit you will learn: O Basic operating principles of a nuclear power plant. O Types of nuclear power plant accidents and plant safety features. O Offsite consequences of nuclear power plant accidents and resultant protective actions. INTRODUCTION To many, the term "nuclear power plant accident" brings to mind the accidents that have occurred at the Three Mile Island and Chernobyl sites. The purpose of this unit is to provide information concerning methods used to minimize the possibilities for these accidents and actions to be taken to minimize their effects on the public. Virtually all commercial nuclear power reactors in the United States are either pressurized water reactors (PWRs) or boiling water reactors (BWRs). These types of reactors are called light water reactors (LWRs) because the reactor core is covered with water to allow the nuclear reaction to take place and to keep the core cool. This unit discusses primarily accidents at light water reactors. This unit is divided into three major sections: Operating Principles of Nuclear Power Plants, Power Plant Accidents, and Offsite Protective Actions. Each of these sections contains information that can be used to respond appropriately to a nuclear power plant accident. The Operating Principles of Nuclear Power Plants section describes how power plants generate electricity. The major processes and components of U.S. nuclear plants are examined. The Power Plant Accidents section describes the design philosophy used for U.S. nuclear plants, some accidents that have occurred, and the effect on the public of those accidents. The Offsite Protective Actions section describes protective actions detailed in the formal emergency plans required for each commercial nuclear power plant in the U.S. These actions are based on minimizing public exposure from a radioactive "plume" and from ingesting radioactive material into the body. 3-1 ...
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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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