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SRA - Projects

Shut Down PRA (Probabilistic Risk Assessment) of the Dodewaard nuclear power station

This is a PRA of the dynamic process that begins with the shutting down of the reactor, then involves changing the fuel and ends with starting up again. A large number of safety systems are not available during this process which in practice takes about 6 weeks (this was the fifth Shut Down PRA in the world). Furthermore PRA studies are performed of amongst others the CANDU reactor (a Canadian heavy-water reactor) and General Electric's SBWR (Small Boiling Water Reactor). These are new types of reactor of which only the design has been completed. The aim of these studies is to give a definitive answer as to whether the reactors meet the criteria imposed by the Dutch government.

Failure Mode and Effects Analysis (FMEA) of traffic transport

Failure Mode and Effects Analysis (FMEA) of traffic transport on the second Van Brienenoord bridge, ordered by the Ministry of Transport. This was judged on its merits before the transport started, to ensure that any undesired events could be anticipated.

Efficiency analysis of different designs for the Eems power station

This power station which came on stream in 1995 had high efficiency requirements imposed on it. The analyses were carried out:

1. to aid the decision-making process
2. so that suppliers could be given well-founded criteria to meet.

The ignition mechanism on the Ariane 5 rocket

The ignition mechanism on the Ariane 5 rocket was analysed on the instructions of STORK. This mechanism was at the design stage. The analysis concerned structural reliability.

"Road pricing" study

KEMA/NRG was commissioned by the Dutch Ministry of Transport to carry out a reliability study on the development of a "Road Pricing" scheme. Various plans were considered and human and technical failures analysed. The scheme was changed as a result of the analysis.

Model developement for RCM

As a result of the long term Research and Development back-up, various computer models have been developed over the years. With respect to to Reliability Centred Maintenance RCM), these models are:

• Operating model
• Stand-by model
• Conservation model
• Inspection model.

These models have been combined into a PC package known as KMOSS.

Failure data collection

For many years failure data have been collected from Dutch power stations. Data analyses provide information with the aim of improving the efficiency of the power stations.

Reliability of Flood barrier

The reliability of the six designs under consideration for a flood barrier in the Nieuwe Waterweg in the Netherlands, has been analysed as part of the selection process. Furthermore the Decide Support System (BOS) which controls the closing of the flood barrier has been assessed to determine its risk of failure.

Reliability of electrical systems

Designs for air-conditioning and electrical systems in computer centres (Shell, Postbank, Sep, Philips) and emergency supply units (European Patent Office, hospitals) have been assessed in terms of efficiency and reliability and compared with alternative designs.

Reliability of Noordersluis lock

The efficiency and reliability of the Noordersluis lock in IJmuiden has been assessed. This is the only access to the port of Amsterdam. The lock is to be altered and renovated. What are the consequences of this?

Other studies

• Development of a fraud risk detection and evaluation system for the department of Justice
• HAZOPS & FMECA's for Chemical and Petrochemical plants
• RAM of Electricity supplies of computer centres (Postbank, Philips, SHELL)
• Port Folio analyses of Research Projects by the Electricity Generation Board (SEP)
• Reliability analysis of Traffic control centres ordered by the Dutch Railways (NS)
• Development of the highly advanced Fault Tree Analysis Code FTA, including features like sophisticated minimal cut sets representation, importance analysis and uncertainty analysis.
• Several Availability studies for Gasunie (Dutch State Gas Company) and Nederlandse Aardolie Maatschappij (Dutch State Oil Company).
• Safety studies for the Dutch State Mines.
• Complete risk assessment and management study on the whether forecast process of the Royal Dutch Meteorological Institute (KNMI).
• Integrated Logistics Support, Maintenance Optimization, RAM studies for the Ministry of Defence.
• Development of "The Red Book" (Methods for determining and processing probabilities), a guiding document for the Dutch industry, prepared for the Committee for the Prevention of Disasters, ordered by the Ministry of Social Affairs and Employment.
• Many R&D projects for the Dutch Electricity Sector.
• Many custom made, on-site courses on several subjects in the field of risk management and decision analysis: RCM, RAM, Simulation modelling

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Update 18 June 2004