Woody wrote this white paper for his sponsor at the Tokyo Inst. of Tech., Professor Ninokata, at the end of April, 2011. His analysis preceded those of the NRC, MIT, HSE, and the IAEA. Download the white paper as PDF … [Read more...] about A PRA Practioner looks at the Great East Japan Earthquake and Tsunami
Projects and Papers
Unforeseen Events, Resilience and PRA
Woody gave a presentation at the second Resilience Engineering Symposium on November 6th, 2006. The accompanying article was included in the book, Resilience Engineering: Remaining Sensitive to the Possibilities of Failure, E. Hollnagel, et. al, editors (Ashgate Press), 2007, under the title “Unexampled Events, Resilience, and PRA”. The words of the presentation have remained … [Read more...] about Unforeseen Events, Resilience and PRA
What’s Wrong with the Fault-Tree Linking Approach for Complex PRA Models?
By Steven A Epstein and Donald Wakefield Download the full document as PDF Executive Summary Analysts using complex probabilistic risk assessment (PRA) models at nuclear power plants have two approaches from which to choose: Fault Tree Linking (FTL) or Large Event Tree Linking (ETL) methods. The choice of which method is utilized depends primarily on history (which method … [Read more...] about What’s Wrong with the Fault-Tree Linking Approach for Complex PRA Models?
RISKMAN – 20 Years After
Download the full document as PDF RISKMAN®, Celebrating 20+ Years of Excellence! Mr. Donald Wakefield Mr. Steven Epstein Dr. Yongjie Xiong Mr. Kamyar Nouri ABS Consulting, 300 Commerce Drive, Suite 200, Irvine, CA 92602-1300, USA Abstract: RISKMAN® is a PC-based, general purpose, integrated tool for quantitative risk analysis. Initiated with software programs first developed … [Read more...] about RISKMAN – 20 Years After
Quantification of Fault Tree Models for Initiating Events
Donald J. Wakefield and Steven A. Epstein ABSG Consulting Inc. Irvine, CA, USA Download the full document as PDF INTRODUCTION It has become common practice throughout the industry for PSA analysts to model multi-train support systems using fault trees. Accepted modeling and quantification procedures for doing so, however, are not available. The following is a list of possible … [Read more...] about Quantification of Fault Tree Models for Initiating Events