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RiskWatcher
PSA Professional
FT Professional
FT Standard
Analysis Tools (RSAT)
FMEA
Requirements		  
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 colors, 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 Modeling:

  • 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 WindowsTM printer support.
  • Tabular or graphic results.