system risk assessment

[centrale]
SRA performs safety analyses for among others the nuclear sectors.

[brug]
SRA activities nowadays are focussed on activities in the non-nuclear industries. An interesting past project was the safety assement of the transport of a huge bridge on the Dutch waterways.

[NRG-Home] > [Products & services] > [S&P-start] > [System risk assessment]

Safety & Performance - System Risk Assessment

The SRA specialists are active in the field since early 1975. During this period risk and reliability analyses have been performed, among others for:

  • Nuclear Power plants
  • Surge barriers "Oosterschelde",
    • and "Nieuwe Waterweg" (Rotterdam Harbour)
  • Chemical & Petrochemical plants
  • Electrical supplies of computer centres (Postbank, Philips, Shell), and hospitals
  • Royal Dutch Meteorological Institute (KNMI)
  • Sea shiplocks, "IJmuiden"
  • Traffic control centres , Dutch Railways (NS)
  • Electrical supplies, Amsterdam Airport
  • Portfolio analyses of research projects

Services

  • Integrated Risk Management
  • probabilistic safety analysis (PSA)
  • risk and reliability assessment
  • risk management
  • maintenance optimisation, maintainability assessment
  • reliability centered maintenance (RCM)
  • failure data collection and interpretation, read a 'pdf-file on failure data'
  • fire and flooding analysis
  • structural reliability assessment
  • decision analysis
  • HAZOP, FMECA
  • life cycle cost management (LCCM)
  • fraude analysis
  • education and training

Nowadays the non-nuclear activities represent a major part of our turn-over. Special additional Activities are:

  • Courses on Risk & Reliability analysis are given on a regular basis
  • All failures of Dutch power plants are collected and analysed
  • On behalf of the governmental "Commitee on prevention of disasters due to hazardous materials" a handbook on Risk Analysis has been written.

Tools and methodologies in use:

  • Fault tree analysis
  • Fault tree analysis
  • Event tree analysis
  • Markov techniques
  • Hazard and Operability Study (HAZOP)
  • Failure Mode and Effects
    • and Criticality Analysis (FMECA)
  • Monte Carlo and other simulation techniques
  • Reliability Centred Maintenance (RCM)
  • Profit Based Decision Analysis (PDA)
  • Dispersion models of gas releases (Effects, RisCalc, own models)
  • Life cycle cost models
  • Quantitative Maintenance Optimization Models

History of this expertise at NRG

The group was set up at KEMA-Nuclear (now part of NRG) in 1975 when a risk analysis had to be conducted at the two nuclear power stations in Dodewaard and Borssele. At that time the first probabilistic study of the safety of nuclear power stations had just been completed in the USA (WASH-1400). This study has served as an example and the people involved in it have become 'gurus'. Our group was the first in Europe to carry out a risk analysis of a nuclear power reactor. A few years later many countries had followed suit. Nowadays it would be unthinkable for a nuclear power station to be given a licence without having been subjected to an extensive Probabilistic Safety Assessment (PSA).

Since 1975 the scope of reliability analysis has expanded to include non-nuclear applications and the emphasis has increasingly shifted towards assisting the decision-making process, often in terms of economic risks or optimisation. Over the years our range of work has expanded to include subjects such as Life Cycle Cost Management, Reliability Centred Maintenance and Decision Analysis of research portfolios.

Projects

A selection of projects conducted.

Contact

Dr. V.A. Wichers, NRG-S&P
PO Box 25, 1755 ZG Petten, Netherlands
tel: +31 224 564656 , fax: +31 224 56 8490,
e-mail: wichers@nrg.eu