Download or read book Human Errors Rates written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reports on a practical method of quantifying human errors made in conjunction with testing, maintaining, and operating select important components in reactor safety systems of licensed nuclear power plants. This quantification of human error is measured in terms of human error rate (HER) namely the ratio of the number of human errors (of a specified type) to the number of opportunities for those particular errors. The human error rates generated in this work provide a very useful broad basis of comparison for appropriate derived and/or best judgment human error rate estimates which have been used in WASH-1400, and also can provide input to bounding type risk assessments. The number of human errors have been extracted from a computer-based data file of one-line description summary interpretations of Licensee Event Reports for interfacing with manual and remotely operated valves and pumps over a three year period ending in 1978. The systems evaluated are the reactor safety systems for 23 BWRs and for 41 PWRs.