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ANTICIPATED OPERATIONAL OCCURRENCES THAT COULD DEVELOP INTO SERIOUS ACCIDENTS

[+] Author and Article Information
Samuel Miranda

Independent Author Silver Spring, MD, USA
sm973@caa.columbia.edu

1Corresponding author.

ASME doi:10.1115/1.4038160 History: Received September 30, 2016; Revised October 04, 2017

Abstract

Nuclear safety criteria are based upon the concept that plant situations that are expected to have a high frequency of occurrence must not pose a danger to the public, and that plant situations that pose the greatest danger to the public must be limited to situations that have a very low expected frequency of occurrence. This concept is implemented by grouping postulated plant situations (or events) into categories that are defined according to their expected frequencies of occurrence. Events in each category must be shown to yield consequences that remain within the limits that are defined for that category. Events must not be allowed to develop into the more serious events that belong in other, higher-consequence categories. In other words, nuclear plant designs must not allow high-frequency, low-consequence events to degrade into high-frequency, high-consequence events. The development of this system of frequency-based categorization is discussed, followed by an evaluation of various methods that have been proposed and applied to show how minor events could be prevented from becoming major events.

Copyright (c) 2017 by ASME
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