Advanced NuclearPower - AREVA

More documents

Recommendations

Info

Projects & EngineeringBeznau: Upgrading I&C withTELEPERM XSFramatome ANP has upgraded the entire reactor protection system at a Westinghouse-built plant with digitalinstrumentation and control (I&C) equipment. The successful upgrading of both units of Switzerland’sBeznau nuclear power plant once again has impressively demonstrated why Framatome ANP is the world leaderin modernizing reactor I&C. In the last 10 years, the company has won well over half of all I&C modernizationcontracts awarded worldwide – an impressive customer vote of confidence – for the digital safety I&C platform,TELEPERM XS, that is currently in use or on order at 23 reactors, including PWRs, BWRs and VVERs,in seven countries.Fit for the Future withTELEPERM XSBy deciding to upgrade the I&Cequipment for reactor scram andengineered safety feature actuation, thecompany that operates Beznau –Nordostschweizerische KraftwerkeAG (NOK) – took an important steptowards ensuring that the plant reflectsthe latest state-of-the-art technologyand can operate economically formany years to come. Replacement ofthese systems had become necessaryas spare parts procurement and componentmaintenance were becomingincreasingly difficult. Anotheraim was to improve ease of testingequipment.In TELEPERM XS, Beznaunow has a digital safety I&C platformthat is fully qualified for nuclearapplications. Other key features includelow inspection and maintenance, andoptimized diagnostics capabilities.Scope of the ProjectThe contract for backfitting BeznauUnits 1 and 2 with new safety I&Cequipment was awarded by NOK in1998. The following enhancements weremade along with installing the newequipment:• Significantly better fault diagnosisin the safety I&C systems• Stricter physical separation ofredundant trains, andBeznau Units 1 and 2 each have an electric output of 380 MW. The first unitstarted commercial operation in 1969 and the second in 1971.• Functional improvements toclosed-loop controls.The former operating and monitoringconcept was retained, meaning thatoperating personnel were not facedwith significant changes.The new safety I&C equipmentis designed with quadruple redundancyand physical separation of all redundanttrains, with the individual safetyfunctions of each train being furtherdivided among two so-called DiversityGroups (A and B). Also, each trainhas two independent TELEPERM XScomputers: one for Diversity Group Aand another for Group B.The new closed-loop controls forthe reactor are of dual redundancy.Key Steps of the Project:From Designing to Installationand StartupIn accordance with Swiss regulatoryguides, the project was divided forboth plant units into four hierarchicallevels consisting of a basic design4 <strong>Advanced</strong> Nuclear Power N O 3 January 2002
Projects & Engineeringphase, a detailed design phase, anengineering phase, and an installationand startup phase.During the basic design phase,with NOK’s assistance, the scope ofI&C equipment requiring replacementwas determined and process requirementswere analyzed and classifiedaccording to their relevance to safety.They then were broken down intoindividual I&C functions for thevarious safety objectives.NOK personnel participated ina complete integral functional testthat was performed for both plant unitson the fully assembled equipment,using a simulator at a test facilityin Erlangen. This enabled the startuptests performed during the refuelingoutages to be restricted to only thosethat involved the plant periphery aswell as process-related tests.Integration of the new I&Cequipment at Beznau was performedduring the refueling outages scheduledfor each of the two units.Enhanced Plant OperationThe operating experience gained atUnit 1 has demonstrated that the newTELEPERM XS safety I&C equipmentfacilitates optimization of plantoperation. Improved control parameters,for example, enable systemsto be operated in such a waythat process components are notsubjected to unduly severestresses. Due to the intrinsicfeatures of the new I&Cequipment, more functions nowcan be performed with lesshardware, freeing cabinet spacefor other tasks.The heart of the new safetyI&C – the TELEPERM XSequipment – is automaticallycyclically tested during plantoperation. Thus the number ofin-service tests routinely requiredduring a plant outage has beenreduced to just those neededfor checking interfaces with theplant periphery.Dr. Urs Weidmann, Headof the Electrical Department atBeznau Nuclear Power Station,expressed his satisfaction asfollows: “Our experience so farhas confirmed that theTELEPERM XS safety I&Csystem meets all of the technicallydemanding goals set for the projectin full. We are convinced that, bychoosing TELEPERM XS, we haveopted for a state-of-the-art, trendsettingreactor protection system.”Beznau installation in processBasic Design PhaseRecording of scopeBasic designApproval of basic designDetailed Design PhaseClarification of interfacesSystem configurationDetailed designTime Schedule1998 19992000200102 03 04 05 06 07 08 09 10 11 12 01 02 03 04 05 06 07 08 09 10 11 12 01 02 03 04 05 06 07 08 09 10 11 12 01 02 03 04 05 06 07 08 09 10Unit 1 Unit 2Engineering PhaseCabinet manufactureFactory testingIntegration planningInstallation and StartupCable run extension/cable layingRelease for installationDismantling/installation/startupRelease for operation<strong>Advanced</strong> Nuclear Power N O 3 January 2002 5
Page 1 and 2: Advanced Nuclear PowerT H E M A G A
Page 6 and 7: Projects & EngineeringPOWERSEP Pre-
Page 8 and 9: Nuclear FuelCombining Enhanced BWR
Page 11 and 12: F O C U SFuel CustomersBenefit From
Page 13 and 14: F O C U SGROUPING IN THE ENERGY SEC
Page 15 and 16: Nuclear ServicesPhenix TV Inspectio
Page 17 and 18: Nuclear ServicesFramatome ANP Beats
Page 19 and 20: Nuclear Serviceswhere a similar typ
Page 21 and 22: Nuke NotesSPAINSWEDENPilot Project
Page 23 and 24: Nuke NotesLeft to right: Guy Campbe

Advanced NuclearPower - AREVA

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?