ESTS0003 IRRAS4.16.
IRRAS, Integrated Reliability and Risk Analysis System for PC
NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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To submit a request, click below on the link of the version you wish to order.
Only liaison officers are authorised to submit online requests. Rules for requesters are
available here.
| Program name | Package id | Status | Status date |
|---|---|---|---|
| IRRAS4.16 | ESTS0003/03 | Tested | 18-AUG-1995 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| ESTS0003/03 | IBM PC | PC-80486 |
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3. DESCRIPTION OF PROGRAM OR FUNCTION
IRRAS4.16 is a program developed for the purpose of performing those functions necessary to create and analyze a complete Probabilistic Risk Assessment (PRA). This program includes functions to allow the user to create event trees and fault trees, to define accident sequences and basic event failure data, to solve system and accident sequence fault trees, to quantify cut sets, and to perform uncertainty analysis on the results. Also included in this program are features to allow the analyst to generate reports and displays that can be used to document the results of an analysis. Since this software is a very detailed technical tool, the user of this program should be familiar with PRA concepts and the methods used to perform these analyses.
IRRAS4.16 is a program developed for the purpose of performing those functions necessary to create and analyze a complete Probabilistic Risk Assessment (PRA). This program includes functions to allow the user to create event trees and fault trees, to define accident sequences and basic event failure data, to solve system and accident sequence fault trees, to quantify cut sets, and to perform uncertainty analysis on the results. Also included in this program are features to allow the analyst to generate reports and displays that can be used to document the results of an analysis. Since this software is a very detailed technical tool, the user of this program should be familiar with PRA concepts and the methods used to perform these analyses.
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4. METHOD OF SOLUTION
IRRAS4.16 is written entirely in MODULA-2 and uses an integrated commercial graphics package to interactively construct and edit fault trees. The fault tree solving methods used are industry recognized top down algorithms. For quantification, the program uses standard methods to propagate the failure information through the generated cut sets.
IRRAS4.16 is written entirely in MODULA-2 and uses an integrated commercial graphics package to interactively construct and edit fault trees. The fault tree solving methods used are industry recognized top down algorithms. For quantification, the program uses standard methods to propagate the failure information through the generated cut sets.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM
Due to the complexity of and the variety of ways a fault tree can be defined it is difficult to define limits on the complexity of the problem solved by this software. It is, however, capable of solving a
substantial fault tree due to efficient methods. At this time, the software can efficiently solve problems as large as other software currently used on mainframe computers. Does not include source code.
Due to the complexity of and the variety of ways a fault tree can be defined it is difficult to define limits on the complexity of the problem solved by this software. It is, however, capable of solving a
substantial fault tree due to efficient methods. At this time, the software can efficiently solve problems as large as other software currently used on mainframe computers. Does not include source code.
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7. UNUSUAL FEATURES OF THE PROGRAM
This software is unique in several ways. First, it uses a relational database to store and manage the risk data associated with an analysis. Second it uses graphical editors to allow the analyst to construct and modify fault tree and event tree logic. Third the algorithms used to solve the fault trees and accident sequences are very fast due to technical advances.
This software is unique in several ways. First, it uses a relational database to store and manage the risk data associated with an analysis. Second it uses graphical editors to allow the analyst to construct and modify fault tree and event tree logic. Third the algorithms used to solve the fault trees and accident sequences are very fast due to technical advances.
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8. RELATED AND AUXILIARY PROGRAMS
IRRAS4.16 is a replacement for version 4.15 of IRRAS which had bee submitted previously. The changes in this version include several minor bug fixes and a
significant change in the way IRRAS4.16 handles the situation where more cut sets are generated than can be stored in the data base. When the user solves a fault tree that has more cut sets than can be stored, IRRAS simply stops storing the cut sets at the point it determines that it cannot keep them all. IRRAS does display the results for all the cut sets generated, but only keeps a subset of the total. This subset was not the most probable cut sets. The procedure has caused much confusion, in that many assumed that IRRAS was keeping the most significant cut sets. Since this confusion may lead to some problems in reporting results, and since the change was very simple, the way the software works has been modified. IRRAS4.16 now keeps the most significant cut sets when the number of cut sets is more than can be stored. This should eliminate any confusion on how IRRAS handles this situation.
IRRAS4.16 is a replacement for version 4.15 of IRRAS which had bee submitted previously. The changes in this version include several minor bug fixes and a
significant change in the way IRRAS4.16 handles the situation where more cut sets are generated than can be stored in the data base. When the user solves a fault tree that has more cut sets than can be stored, IRRAS simply stops storing the cut sets at the point it determines that it cannot keep them all. IRRAS does display the results for all the cut sets generated, but only keeps a subset of the total. This subset was not the most probable cut sets. The procedure has caused much confusion, in that many assumed that IRRAS was keeping the most significant cut sets. Since this confusion may lead to some problems in reporting results, and since the change was very simple, the way the software works has been modified. IRRAS4.16 now keeps the most significant cut sets when the number of cut sets is more than can be stored. This should eliminate any confusion on how IRRAS handles this situation.
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10. REFERENCES
- T.W. Bolander et al.:
Verification and Validation of the SAPHIRE version 4.0 PRA
Software Package
NUREG/CR-6145 (February 1994)
- T.W. Bolander et al.:
Verification and Validation of the SAPHIRE version 4.0 PRA
Software Package
NUREG/CR-6145 (February 1994)
ESTS0003/03, included references:
- K.D. Russel et al.:Integrated Reliability and Risk Analysis System (IRRAS) Version
4.0
Reference Manual
NUREG/CR-5813
EGG-2664 Vol.1 (January 1992)
- R.L. VanHorn et al.:
Integrated Reliability and Risk Analysis System (IRRAS) Version
4.0
Tutorial
NUREG/CR-5813
EGG-2664 Vol.2 (October 1992)
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11. MACHINE REQUIREMENTS
IBM PC/XT/AT/PS/2, or 100% compatible computer running DOS5.0. The PC must have a 640 K of RAM, and EGA/VGA compatible monitor and display adapter, and a hard disk with at least 10 megabytes of free space. A numeric math co-processor and a mouse are highly recommended.
IBM PC/XT/AT/PS/2, or 100% compatible computer running DOS5.0. The PC must have a 640 K of RAM, and EGA/VGA compatible monitor and display adapter, and a hard disk with at least 10 megabytes of free space. A numeric math co-processor and a mouse are highly recommended.
ESTS0003/03
The program was implemented at the NEA Data Bank on aDELL 466/L (66MHz) PC/80486.
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ESTS0003/03
The program was running at the NEA Data Bank under MS-DOS 6.0.[ top ]
14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
This
software uses the Media Cybernetics HALO graphical support routines. The run time files are included with this software and can be distributed with this software as a license has been acquired. Since no source code or sample problems were included in the submittal of this package, the executable, as submitted by author, was evaluated and screened. PKZIP 1.1 was used in creating this software. SOURCE CODE IS NOT INCLUDED.
This
software uses the Media Cybernetics HALO graphical support routines. The run time files are included with this software and can be distributed with this software as a license has been acquired. Since no source code or sample problems were included in the submittal of this package, the executable, as submitted by author, was evaluated and screened. PKZIP 1.1 was used in creating this software. SOURCE CODE IS NOT INCLUDED.
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ESTS0003/03
| File name | File description | Records |
|---|---|---|
| ESTS0003_03.001 | Information file | 240 |
| ESTS0003_03.002 | IRRAS batch file | 2 |
| ESTS0003_03.003 | batch file #1 | 2 |
| ESTS0003_03.004 | batch file #2 | 2 |
| ESTS0003_03.005 | batch file #3 | 2 |
| ESTS0003_03.006 | batch file #4 | 2 |
| ESTS0003_03.007 | batch file #5 | 2 |
| ESTS0003_03.008 | batch file #6 | 2 |
| ESTS0003_03.009 | batch file #7 | 2 |
| ESTS0003_03.010 | batch file #8 | 2 |
| ESTS0003_03.011 | batch file #9 | 2 |
| ESTS0003_03.012 | batch file #10 | 2 |
| ESTS0003_03.013 | batch file #11 | 3 |
| ESTS0003_03.014 | batch file #12 | 2 |
| ESTS0003_03.015 | batch file #13 | 2 |
| ESTS0003_03.016 | DEMO variable length data file #1 | 0 |
| ESTS0003_03.017 | DEMO variable length data file #2 | 0 |
| ESTS0003_03.018 | DEMO variable length data file #3 | 0 |
| ESTS0003_03.019 | DEMO variable length data file #4 | 0 |
| ESTS0003_03.020 | DEMO variable length data file #5 | 0 |
| ESTS0003_03.021 | DEMO variable length data file #6 | 0 |
| ESTS0003_03.022 | DEMO variable length data file #7 | 0 |
| ESTS0003_03.023 | DEMO variable length data file #8 | 0 |
| ESTS0003_03.024 | DEMO variable length data file #9 | 0 |
| ESTS0003_03.025 | DEMO variable length data file #10 | 0 |
| ESTS0003_03.026 | DEMO variable length data file #11 | 0 |
| ESTS0003_03.027 | DEMO data file #1 | 0 |
| ESTS0003_03.028 | DEMO data file #2 | 0 |
| ESTS0003_03.029 | DEMO data file #3 | 0 |
| ESTS0003_03.030 | DEMO data file #4 | 0 |
| ESTS0003_03.031 | DEMO data file #5 | 0 |
| ESTS0003_03.032 | DEMO data file #6 | 0 |
| ESTS0003_03.033 | DEMO data file #7 | 0 |
| ESTS0003_03.034 | DEMO data file #8 | 0 |
| ESTS0003_03.035 | DEMO data file #9 | 0 |
| ESTS0003_03.036 | DEMO data file #10 | 0 |
| ESTS0003_03.037 | DEMO data file #11 | 0 |
| ESTS0003_03.038 | DEMO data file #12 | 0 |
| ESTS0003_03.039 | DEMO data file #13 | 0 |
| ESTS0003_03.040 | DEMO data file #14 | 0 |
| ESTS0003_03.041 | DEMO data file #15 | 0 |
| ESTS0003_03.042 | DEMO index file #1 | 0 |
| ESTS0003_03.043 | DEMO index file #2 | 0 |
| ESTS0003_03.044 | DEMO index file #3 | 0 |
| ESTS0003_03.045 | DEMO index file #4 | 0 |
| ESTS0003_03.046 | DEMO index file #5 | 0 |
| ESTS0003_03.047 | DEMO index file #6 | 0 |
| ESTS0003_03.048 | DEMO index file #7 | 0 |
| ESTS0003_03.049 | DEMO index file #8 | 0 |
| ESTS0003_03.050 | DEMO index file #9 | 0 |
| ESTS0003_03.051 | DEMO index file #10 | 0 |
| ESTS0003_03.052 | DEMO index file #11 | 0 |
| ESTS0003_03.053 | DEMO index file #12 | 0 |
| ESTS0003_03.054 | DEMO DFL file | 0 |
| ESTS0003_03.055 | DEMO fault tree graphics file #1 | 0 |
| ESTS0003_03.056 | DEMO fault tree graphics file #2 | 0 |
| ESTS0003_03.057 | DEMO event tree graphics file | 17 |
| ESTS0003_03.058 | program executable file #1 | 0 |
| ESTS0003_03.059 | program executable file #2 | 0 |
| ESTS0003_03.060 | program executable file #3 | 0 |
| ESTS0003_03.061 | program executable file #4 | 0 |
| ESTS0003_03.062 | program executable file #5 | 0 |
| ESTS0003_03.063 | program executable file #6 | 0 |
| ESTS0003_03.064 | program executable file #7 | 0 |
| ESTS0003_03.065 | program executable file #8 | 0 |
| ESTS0003_03.066 | program executable file #9 | 0 |
| ESTS0003_03.067 | program executable file #10 | 0 |
| ESTS0003_03.068 | program executable file #11 | 0 |
| ESTS0003_03.069 | program executable file #12 | 0 |
| ESTS0003_03.070 | program executable file #13 | 0 |
| ESTS0003_03.071 | program executable file #14 | 0 |
| ESTS0003_03.072 | program executable file #15 | 0 |
| ESTS0003_03.073 | program executable file #16 | 0 |
| ESTS0003_03.074 | program executable file #17 | 0 |
| ESTS0003_03.075 | program executable file #18 | 0 |
| ESTS0003_03.076 | program executable file #19 | 0 |
| ESTS0003_03.077 | program executable file #20 | 0 |
| ESTS0003_03.078 | program executable file #21 | 0 |
| ESTS0003_03.079 | program executable file #22 | 0 |
| ESTS0003_03.080 | program executable file #23 | 0 |
| ESTS0003_03.081 | program executable file #24 | 0 |
| ESTS0003_03.082 | program executable file #25 | 0 |
| ESTS0003_03.083 | program executable file #26 | 0 |
| ESTS0003_03.084 | program executable file #27 | 0 |
| ESTS0003_03.085 | program DFL file #1 | 0 |
| ESTS0003_03.086 | program DFL file #2 | 0 |
| ESTS0003_03.087 | program DFL file #3 | 0 |
| ESTS0003_03.088 | program DFL file #4 | 0 |
| ESTS0003_03.089 | program DFL file #5 | 0 |
| ESTS0003_03.090 | program DFL file #6 | 0 |
| ESTS0003_03.091 | program DFL file #7 | 0 |
| ESTS0003_03.092 | program DFL file #8 | 0 |
| ESTS0003_03.093 | program DFL file #9 | 0 |
| ESTS0003_03.094 | program file #1 | 0 |
| ESTS0003_03.095 | program file #2 | 0 |
| ESTS0003_03.096 | graphics file #1 | 0 |
| ESTS0003_03.097 | graphics file #2 | 0 |
| ESTS0003_03.098 | graphics file #3 | 0 |
| ESTS0003_03.099 | graphics file #4 | 0 |
| ESTS0003_03.100 | graphics file #5 | 0 |
| ESTS0003_03.101 | graphics file #6 | 0 |
| ESTS0003_03.102 | graphics file #7 | 0 |
| ESTS0003_03.103 | graphics file #8 | 0 |
| ESTS0003_03.104 | graphics file #9 | 0 |
| ESTS0003_03.105 | graphics file #10 | 0 |
| ESTS0003_03.106 | graphics file #11 | 0 |
| ESTS0003_03.107 | graphics file #12 | 0 |
| ESTS0003_03.108 | graphics file #13 | 0 |
| ESTS0003_03.109 | graphics file #14 | 0 |
| ESTS0003_03.110 | graphics file #15 | 0 |
| ESTS0003_03.111 | graphics file #16 | 0 |
| ESTS0003_03.112 | graphics file #17 | 0 |
| ESTS0003_03.113 | graphics file #18 | 0 |
| ESTS0003_03.114 | graphics file #19 | 0 |
| ESTS0003_03.115 | graphics file #20 | 0 |
| ESTS0003_03.116 | graphics file #21 | 0 |
| ESTS0003_03.117 | graphics file #22 | 0 |
| ESTS0003_03.118 | graphics file #23 | 0 |
| ESTS0003_03.119 | graphics file #24 | 0 |
| ESTS0003_03.120 | graphics file #25 | 0 |
| ESTS0003_03.121 | graphics file #26 | 0 |
| ESTS0003_03.122 | graphics file #27 | 0 |
| ESTS0003_03.123 | graphics file #28 | 0 |
| ESTS0003_03.124 | graphics file #29 | 0 |
| ESTS0003_03.125 | graphics file #30 | 0 |
| ESTS0003_03.126 | graphics file #31 | 0 |
| ESTS0003_03.127 | graphics file #32 | 0 |
| ESTS0003_03.128 | graphics file #33 | 0 |
| ESTS0003_03.129 | graphics file #34 | 0 |
| ESTS0003_03.130 | graphics file #35 | 0 |
| ESTS0003_03.131 | graphics file #36 | 0 |
| ESTS0003_03.132 | graphics file #37 | 0 |
| ESTS0003_03.133 | graphics file #38 | 0 |
| ESTS0003_03.134 | graphics file #39 | 0 |
| ESTS0003_03.135 | graphics file #40 | 0 |
| ESTS0003_03.136 | graphics file #41 | 0 |
| ESTS0003_03.137 | graphics file #42 | 0 |
| ESTS0003_03.138 | graphics file #43 | 0 |
| ESTS0003_03.139 | graphics file #44 | 0 |
| ESTS0003_03.140 | graphics file #45 | 0 |
| ESTS0003_03.141 | graphics file #46 | 0 |
| ESTS0003_03.142 | graphics file #47 | 0 |
| ESTS0003_03.143 | DOS file-names | 142 |
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- G. Radiological Safety, Hazard and Accident Analysis
- K. Reactor Systems Analysis
Keywords: Monte Carlo method, fault tree analysis, reliability, risk assessment.