• CLEARSY designs and realizes its own systems, hard-wired or programmed, and assists the main Energy manufacturers: EDF, CEA, Areva TA, Alstom Power, Siemens, Schneider Electric, General Electric, Vinci Energie, Spie Nucléaire, Clemessy, Comex Nucléaire, Eiffage, DCNS. CLEARSY is a referent for many post-Fukushima refurbishing projects.
  • The tools, advanced methods, and safety critical design experience feedback of CLEARSY, are used to assume command control projects requirements or design of components, with hardware and software features, consideration of normative standards, mastering of the life cycle, and compliance with nuclear authorities requirements.
  • A continuous technological surveillance is carried out to perform systems and projects compliance to standards IEC 61508 and derivatives (IEC 61511…), to nuclear corpus SC45A (IEC 61513, 61226, 60880, 62138…) and to RCC- E.

Safety systems development applied to energy

Safety command control architecture

  • Intrinsic safety
  • Common modes (DCC), 2003-2002
  • Vote
  • Self testing

RAMS Studies

  • Reliability
  • Fault tree analysis
  • System Hardware Software

Important equipments for the safety

  • PLC
  • Hard wired logic
  • Cubicles
  • Electronic boards
  • CEP

Development of safety software and safety plc programs

  • Schneider
  • Siemens
  • Rockwell
  • HIMA

Requirement engineering

  • Recitfy

Formal modelling of complex systems

  • Control build
  • B

Standards compliance

  • RCC-E
  • Normes IEC
  • EUR
  • AIEA

System and software certification

  • CEP

Own platform to qualify plc and industrial protocols DAME

    Consult all our achievements in the field of energy


    Technical expertise of AS135-2 command control module

     > Obsolescence analysis and performances enhancement in the purpose of a qualification according to IEC 61513 and RCC-E


    Qualification of equipment for EPR-UK project

     > Demonstration of compliance to 61513 et 61508 standards based on a methodical implementation of Reqtify


    Formal method for V&V and integration on Areva CCS Safety systems

     > Application of a formal method for specification analysis, test program verification, and target environments of CCS systems


    Expertise of waste packing command control

     > Technical and functional expertise of the system architecture following to an incident.


    Operational Safety System for Laser Megajoule (SSP LMJ)

     > RAMS studies to raise system safety level to SIL2

     > Upgrade of the simulator and development of scenarios for equipment validation

    CC RJH

    Study for genericity of RJH B and C classified command control

     > Definition of reusable principles and patterns to comply B and C categories according to IEC 61513 standard

    C4A RJH

    Preliminary study of C4a command control

     > Device for nuclear fuel irradiation including A and C classified sub-systems

     > According to IEC 61226 and to CEA/DEN Design command control Guidelines


    Qualification of DUS command control (Ultimate Rescue Diesel engine)

     > Qualification according to IEC 61513 C category and RCC-E of: cubicles, software, networks


    Safety study and SIL2 software development for stowage buoys of tankers

     > Buoys for stowage and supply of Total company tankers

     > Safety study and implementation of SIL2:61508 functions for instrumentation and electrical supply of the buoys

     > Rockwell PLC

    PLC K3/C3-C2

    Technical qualification of PLC to build a reference catalogue

     > Requirements specification for PLC providers in the context of 900 and 1300 MW French nuclear plants refurbishing, for K3/C3 classified command controls

     > Detailed study of C3 communication within an operational context


    Federate system for 900 and 1300 MW French nuclear plant MRO

     > Integration of safety critical software design requirements into a “federate system” for the exchange data between SCADA and SAD (mobile systems)

    CC SN

    Safety critical software for the command control of a nuclear water heater

     > Formal development of a high available SN classified project according to Areva TA standards

     > 100 software components – 3400 evidences proved


    Safety study for the Castigneau power station

     > Study of the design and the realization of equipments: HV electrical panels, converter, cooling chain, PLC


    Audit of the RTE power stations setting up process


    Securisation of the travelling crane of the Technicentre of Lyon

     > Software development for the 4 PLC in charge of the command of the travelling crane of the TGV warehouse. Avoiding of the retractable catenaries

     > PLC Siemens LM151 and 315F – 100 I/O – ProfiSafe / Rail booster


    Command control for the water level regulation of Fessenheim reach

     > Post-Fukushima project

     > Gates and valves commands according to seismic and water level sensors

     > Redundancy management

     > SIS system and software requirements, SIL3 :IEC 61508 software development

     > HIMAX –Reqtify – ControlBuild – SILWorX – Vijeo Designer


    Liability study for high flow reactor emergency function

     > Liability study including the seismic stop function and the safety logic


    Qualification of a C classified system

     > US measurement system for a C category function according to IEC 61226

     > Support to qualification based on IEC 62671 standard


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