Living PRAs (probabilistic risk analysis) made easier with IRRAS (Integrated Reliability and Risk Analysis System)

Conference · Sat Dec 31 23:00:00 EST 1988

OSTI ID:6927730

Russell, K D; Sattison, M B ^[1]; Rasmuson, D M ^[2]

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1. EG and G Idaho, Inc., Idaho Falls, ID (USA)
2. Nuclear Regulatory Commission, Washington, DC (USA). Div. of Systems Research

The Integrated Reliability and Risk Analysis System (IRRAS) is an integrated PRA software tool that gives the user the ability to create and analyze fault trees and accident sequences using an IBM-compatible microcomputer. This program provides functions that range from graphical fault tree and event tree construction to cut set generation and quantification. IRRAS contains all the capabilities and functions required to create, modify, reduce, and analyze event tree and fault tree models used in the analysis of complex systems and processes. IRRAS uses advanced graphic and analytical techniques to achieve the greatest possible realization of the potential of the microcomputer. When the needs of the user exceed this potential, IRRAS can call upon the power of the mainframe computer. The role of the Idaho National Engineering Laboratory if the IRRAS program is that of software developer and interface to the user community. Version 1.0 of the IRRAS program was released in February 1987 to prove the concept of performing this kind of analysis on microcomputers. This version contained many of the basic features needed for fault tree analysis and was received very well by the PRA community. Since the release of Version 1.0, many user comments and enhancements have been incorporated into the program providing a much more powerful and user-friendly system. This version is designated IRRAS 2.0''. Version 3.0 will contain all of the features required for efficient event tree and fault tree construction and analysis. 5 refs., 26 figs.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (USA)
• Sponsoring Organization: NRC
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 6927730
• Report Number(s): EGG-M-89329; CONF-890855--60; ON: DE90010938
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ACCIDENTS
COMPUTER ARCHITECTURE
COMPUTERS
DATA BASE MANAGEMENT
DIGITAL COMPUTERS
FAULT TREE ANALYSIS
MANAGEMENT
MICROCOMPUTERS
PERSONAL COMPUTERS
REACTOR ACCIDENTS
RISK ASSESSMENT
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS