S.Ciattaglia EU safety contact person EFDA CSU Garching

1. Kick-off-meeting of EFDA TW6-TSL-002contracts 06-1412, 06-1413, 06-1414, 06-1415Safety assessment for EU TBM to support ITER Licensing Process09 Oct 2006 • Background • Status of DDD • Status of safety analysis • FMEA few results • Aim of the task TSL-002 • Summary S.Ciattaglia EU safety contact person EFDA CSU Garching KoM meeting 09 Oct 06

2. Status of DDD • No modification from the versions of beginning 2006, in particular of the section 3.6“Safety analysis” that reports the safety analysis performed by the Designers: • Source terms • Thermo-mechanical and thermo-hydraulic analysis The Chapters will be updated/completed with the outputs of the on going safety tasks Need to define SIC classification for TBM systems and components (request from Designers) • a lot of TBM pipes will cross through the closure plate of the Port Plug, • a lot of TBM pipes will be located in the Port Cell, along with some equipments (e.g. PIC), Designers would like to better understand • what are the implication from the Licensing point of view (those pipes/equipments constitutes a prolongation of the VV primary boundary). • Will they be safety-classified? • What could be the implication? (double containment, qualification in procurement, etc..). KoM meeting 09 Oct 06

3. Safety analysis scheme mSv/y mSv/y Effluents Effluents DCF DCF Normal Normal working working man*Sv/y man*Sv/y Occupational dose Occupational dose conditions conditions PST PST SOURCE SOURCE PIE IE Containments Containments Thermodynamic transients Thermodynamic transients dose/sequence dose/sequence TERMS TERMS AS AS DCF DCF Release from the plant Release from the plant Aerosols and H3 transport Aerosols and H3 transport to MEI to Public ASSESSMENT ASSESSMENT PST PST EST EST Overall Plant Safety Analysis Overall Plant Analysis frequency*dose frequency*dose FFMEA FMEA Management Management Quantity and Quantity and Radioactive waste Radioactive waste • • On On - - site site waste waste Operational&Decomm waste Operational&Decomm waste • • Recycling Recycling categories categories Identification&classification Identification&classification • • Final disosal Final disosal P IE Initiating Events AS Accident Sequences FMEA Functional Failure Mode and Effect Analysis PST Process Source Term EST Environmental Source Term DCF Dose Conversion Factor KoM meeting 09 Oct 06

4. EU safety analysis aim bring TBM safety analysis to similar maturity level of other SIC systems as requested by French regulations, considering also the recommendations made by NSA as output of DOS analysis point out open issues and a relevant credible R&D programme Significant safety analysis have been already done by the EU TBM Designers Safety analysis missing/to be rewieved Neutronic review: report ready for HCLL, by Dec for HCPB FMEA: almost concluded for HCPB, just started for HCLL Most severe accidents: KoM today ORE: KoM today Waste review: KoM today R&D and further analysis definition: mid 2007 Status of safety analysis KoM meeting 09 Oct 06

5. Failure Mode and Effect Analysis Garching – 28 September 2006 FMEA Table (columns) • Component • Operation States • Failure Modes • Causes • Preventive Action on Causes • Consequences • Corrective/Preventive Action on Consequences • PIEs • Comments Normal Operation = Burning & Dwell KoM meeting 09 Oct 06

6. Failure Mode and Effect Analysis 28 September 2006 HCPB Components (~ 140) KoM meeting 09 Oct 06

7. Failure Mode and Effect Analysis Garching – September 2006 Sample of FMEA Table KoM meeting 09 Oct 06

8. Failure Mode and Effect Analysis Garching – September 2006 Postulated Initiating Events Identified by the FMEA for HCPB KoM meeting 09 Oct 06

9. AIM of the Task TSL-002 • Deterministic analysis of the most severe accident sequences for each of the two EU TBM concepts Occupational Radiation Exposure (ORE) assessment considering the new designs of the two EU TBM modelsWaste assessment for both TBM concept considering the new neutronic calculationsThe analysis will take advantage of the work already done inside the Design TeamsA technical co-ordination is foreseen focused on addressing, supporting and reviewing the safety analysis with particular reference to the deterministic analysis, the relevant modelisation of circuits and volumes, the codes and the assumptions with reference to the last updated design documents and the technical content description of TBM preliminary safety analysis report. KoM meeting 09 Oct 06

10. EU TBM safety analysis plan • Neutronic analysis April - July (Oct-Dec) 06 • FMEA: PIEs June - Oct 06 • Accident sequences: DBA and BDBA July (Sept) 06 - Feb 07 • Revision of ORE and Waste July (Nov) 06 - Feb 07 • Final Report March 06 • R&D for TBM safety open issues (if any) by Mid 07 KoM meeting 09 Oct 06

11. Summary A systematic approach has been launched on EU TBM safety analysis • FMEA and PIE-PIT • Review of neutronics, ORE, Wastes • Accident sequences analysis Some delay in Neutronic analysis, slightly in FMEA (it will be ready by Oct) • Planning • by March 2007 all the analysis missing (most severe accidents, ORE, Wastes) • in 2007, safety review of Final Design and definition of R&D for the safety open issues, if any Quality of analysis and computer codes Need to define SIC classification for TBM systems and components 18 Dec 06 next ITER TBM safety meeting: check the progress of TBM safety analysis in all Parties KoM meeting 09 Oct 06

12. AGENDA KoM meeting 09 Oct 06