Instrumentation and Control TELEPERM XS The Digital ... - AREVA

Reliable: The TELEPERM XS SystemPlatform – Reliability GuaranteedThe reliability of the safety I&C systemsis an important prerequisite for safe andeconomic plant operation. That is whywe made quality and reliability top priorityin the selection and developmentof the system platform componentsas well as in the design of our systemsright from the beginning.Simple design principlesThe design of the TELEPERM XSsystem platform was guided by clearand comprehensible principles. Theseinclude in particular the strictly cyclicoperation of the software and thecommunication means, the absence ofprocess-controlled interrupts, and thehighly standardized, simple softwarestructure, assured by automatic codegeneration. The stringent observanceof these principles not only ensuresmaximum reliability but also makes thestructure and operation principles ofTELEPERM XS systems transparent toboth users and licensing authorities.Robust hardware componentsThe majority of the hardware componentsare series-produced, serviceprovenindustrial components speciallyqualifi cation-tested for use in safety I&Csystems. During the design of the componentsspecially developed forTELEPERM XS, we paid particularattention to structural simplicity andoutstanding robustness.Reliable softwareThe system software was developedin compliance with the quality anddesign requirements specifi ed in theapplicable international nuclear codesand standards. Thus, all stages in thedevelopment process were performed,documented, reviewed and releasedin accordance with the phase modelcalled for in these standards. The inhousetests and trials were backed upby independent inspections by externalexperts at all stages of development.The system software and the application-specific software are strictlyseparated. The project specifi c application-specific software is automaticallygenerated from engineering diagrams(hardware architecture and functiondiagrams). This ensures consistencybetween specifi cation, documentationand application software at all times.Efficient engineering,tool-supported in all phasesThe engineering process has highestimportance for the quality and thus alsofor the reliability of any plant-specifi csystem implementation. The process isstructured in phases and high performancetools support the related workflow. The phases comprise all steps ina project: requirements specifi cation,confi guration of the system architecture,design of interfaces to the plant andthe I&C functions, code generation withverifi cation and validation, and fi nallythe preparation of the installation andcommissioning documents.Qinshan 1, ChinaTELEPERM XS cabinetreactor protection systemThe service-proven simulation toolSIVAT makes it possible to test theapplication software at an early stage inthe engineering process, independentlyof the availability of the target systemhardware. The use of pre-validated applicationsoftware signifi cantly reducesefforts in the test fi eld. The SIVAT toolhas even been used to validate extensivemodifi cations to systems alreadyinstalled, making test fi eld checksunnecessary for software modifi cations.Experience shows that preceding simulationwith SIVAT reduces modifi cationsduring commissioning and trial operationto an absolute minimum.TELEPERM XSDigital modul SVE25