Safety and Reliability Analysis

Safety and reliability play a major role when it comes to the design of critical facilities. The Risk Management Consultancy (RMC) team at NRG has expertise in a wide range of disciplines that deal with safety and reliability.

Some activities included in the RMC portfolio:

External safety analyses of wind turbines
The emergence of wind power as an alternative energy source in the Netherlands creates the need for analysis and assessment of the risks of a failing wind turbine on its surroundings. For over 20 years, NRG has quantified the external risk of wind turbines in the vicinity on (vital) objects such as pipelines, power cables and other vital infrastructure. To achieve the best possible quantification, NRG has developed simulation models which include air-drag force and prevailing wind direction distributions.

NRG is co-author of early versions of the Handbook Risk Zoning of Wind turbines (HRW), which describes the calculation and verification methodologies to quantify the risk of wind turbines on objects in the vicinity. NRG has also provided expertise in the development of the latest edition of the HRW. Due to the involvement of RMC specialists in the compilation of the HRW, NRG is a major player in the field of assessment and/or execution of external safety analyses for wind turbines.

System Safety of the BOXER
NRG has been closely involved in the development of the BOXER, a recently commissioned eight-wheeled armoured vehicle of the Dutch Army. NRG was responsible for analysing the security risks for people working in and around the BOXER.

The risk assessments were part of the development of the vehicle and are based on existing System Safety methodologies such as Failure Mode Effect Analysis and Fault Tree Analysis.
Using these analyses, security risks of the vehicle were identified at an early stage and related design changes recommended.

Reliability of data delivery to LMW
The (Dutch) National Monitoring Network of Water Levels (LMW) is responsible for measuring current parameters such as water levels, flow rates and wind speeds on land and at sea. These parameters are essential for the models which predict the course of the water at key locations in the water network, such as the Maeslant surge barrier.

At the request of the authorities (Rijkswaterstaat), NRG analysed the reliability of delivery of this data. The analyses are used to identify the weak points in the LMW and led to recommendations which helped increase the reliability of the LMW.

Hazard and Operability Analysis (HAZOP)
RMC team has extensive experience in the Hazard and Operability Analysis technique (HAZOP), both for nuclear and non-nuclear clients. In recent years, HAZOP analyses have been performed for the HFR Petten, Hot Cell labs Fontijne and Iter.

Management of Change
The RMC team includes specialists with vast practical experience in the field of Engineering Change. Engineering change is necessary to ensure that the operating configuration of an installation remains known and within the boundaries of safety guidelines. Currently this experience is applied in formulating procedures in the field of managing change in the HFR installations.