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RiskSpectrum^® PSA Professional

Our top-of-the-line product which includes a full set of functions for both fault tree and event tree analysis, and integration of the two methods. PSA Professional is the choice of a large number of organisations involved in nuclear power plant PSA (Probabilistic Safety Assessment).

General Features:

• The PSA is developed and stored in a relational database with a design and functionality that simplifies creation and maintenance of a living PSA model.
• Graphical event tree and fault tree editors.
• Editing of "other" data (basic events, parameters, etc) in tables or in data forms. Powerful functions for editing, copying, renaming, searching, replacing, sorting, and filtering all kinds of data.
• Multiple Document Interface (MDI) allowing several windows open at the same time.
• Central navigation in PSA database through a "project navigator" window with a hierarchical database representation.
• Program options allows the user to control colours, fonts, fault tree and event tree layout and symbols, etc.
• Upwards compatible with RiskSpectrum for DOS: Just open existing RS-DOS projects and they are automatically converted to the new format.
• Interface to other WindowsTM software (word-processors, spread-sheets, databases) through copy-paste.

Database Contents:
 

Fault trees Event trees Event tree sequences Gates Basic events CCF events Initiating events Function events Consequences Template events CCF groups Attributes Components Parameters (Probability, Failure rate, Frequency, MTTR, Test interval, Time to first test, Mission time) Systems Basic event groups	Analysis cases (Fault tree, Sequence, Consequence, Group, MCS) Results (MCS, Uncertainty, Importance, Time-dependent, Group) Memos
	Table editor

Fault Tree and Event Tree Modelling:

• Linking between event trees and fault trees, and linking of "chains" of event trees.
• House events and exchange events allow complex variations of a base model, which makes it easy to manage different plant configurations, specialisation of models for different initiating events and/or different accident sequences. These features are particularly valuable in carrying out external event analyses.
• CCF groups for automated CCF quantification based on several different CCF models

Fault Tree Editor

Event Tree Editor

Analysis Functions:

• Powerful analysis functions based on a fast minimal cut set (MCS) algorithm that generates and stores MCS equations.
• Uncertainty, importance, sensitivity, and time-dependent reliability analyses.
• Analyses can be carried out on several levels; Any fault tree gate, any individual event tree sequence, any consequence (every event tree sequence can be assigned one or more consequences, e.g. a plant damage state).
• Analysis groups allow definition of complex sets of analysis runs, so that hundreds of analyses can be carried out in an automated sequence. This is particularly valuable when re-calculating the entire PSA.
• Success top events in event trees are handled both qualitatively and quantitatively.

Reporting:

• High-quality report generator for printing.
• User controllable formatting, sorting, filtering.
• Full Windows printer support.
• Tabular or graphic results.

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