Solvina - Nuclear Power Engineering Consultants

Solvina provides services and products to the nuclear power industry including: system engineering, reactor safety, verification and validation, human system interface, auxiliary power systems, nuclear power consulting, licensing and process control. Our specialty is our cross-disciplinary competence and experience on both PWR and BWR plants.

By using Solvina consultants our clients access competence and experience in several technical disciplines such as energy, chemical and process systems, power systems, process control and dynamics, and safety systems.

Nuclear process control

Solvina provides:

• Dynamic system analysis and simulations
• Development and improvements of control-system design and tuning (I&C systems)

Power system analysis

We offer system analysis and design of the power system including the auxiliary power system and emergency power system. Analysis is performed in the following areas;

• Protection coordination and selectivity analysis for the electrical power systems
• Dynamic simulation of the power system
• Load schemes
• Fault analysis

Nuclear licensing - reactor safety

Solvina provides support with licensing or safety demonstration support for plant modifications and upgrades, as well as development and updating of safety analysis reports (SAR / FSAR) and technical specifications (STF). We also cover interpretation and application of standards and guidelines such as IEC (6)1226 for safety classification, IEC (6)1346 for structuring of functions and products, and ISO 9001 and 10007 for configuration management.

Nuclear system engineering

Our nuclear power plant system engineering services cover:

• Diversification, common-cause failure, defence-in-depth, critical safety functions, fail safe
• Business engineering, design and implementation of working processes
• Project management and technical coordination
• Human factors engineering (HFE/HSI/MMI) and training
• Requirement analysis and management

Nuclear power plant simulation

Solvina provides stationary and dynamic simulators for process, power and control systems used for design, analysis and training purposes.

We work with several different simulation tools depending on our clients' needs and requirement. We have developed Solvina-unique model libraries and tools based on commercial software.

The very common tool Microsoft Excel is used for stationary energy and heat analysis of nuclear processes. The tool contains steam tables, unit operations for e.g. pumps, valves and heat-exchangers, and pressure-drop calculations. The tool is suited for:

• Heat balances
• Analysis of different operational modes
• Mapping of steam and energy consumption
• Pressure drop calculations
• Flow sheeting and design
• Documentation of the process

Our dynamic simulators of nuclear power plants are based on a model library named SolvSim Steam Power. The software tool used is Modelica / Dymola. Other software that we use is Simpow and Neplan.

Typical applications for dynamic nuclear simulators are:

• Control system design and tuning
• Assessment of dynamic capacities
• Transient analysis
• Decision-tool for plant or system design
• Review-of-safety analysis

References

Among our references you will find:

• Ringhals
• Forsmarks Kraftgrupp
• OKG Aktiebolag
• Westinghouse Electric Sweden