Safety and reliability assessment of the EDS (Engineering Demonstration System) Hardwire Interlock System using extended fault trees

摘要

A safety and reliability assessment of the Laser Isotope Separation (LIS) Engineering Demonstration System (EDS) Hardwire Interlock System (HIS) has been completed. A major objective of the assessment was to identify any single-point failures in the HIS that could cause an unacceptable radiological hazard, and this report presents the results of this assessment. We present a brief tutorial review of fault tree methods and summarize a new method for handling closed loop fault structures called extended fault trees. We also outline a new computation procedures called Monitored and Controlled Systems (MCS), which was developed to apply extended fault trees to the HIS.