MONITORING MEETING EFDA Technology Workprogramme 2005 Activities 2005-2006 Field: Safety and Environment Task Area: Waste Management TW5-TSW-001 Mol, June.

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Presentation transcript:

MONITORING MEETING EFDA Technology Workprogramme 2005 Activities Field: Safety and Environment Task Area: Waste Management TW5-TSW-001 Mol, June 27 th, 2006: L. Ooms, S. Leblanc

MONITORING MEETING Deliverable 2: Define the activity limits for the dismantling, melting, fabrication or reuse and waste. Deliverable 7: Define the categories of materials based on the different paths in the material cycle of a fusion reactor. Deliverable 8a: Define the R&D needs.

Del. 2: Activity limits Waste ClassDose rate D (mSv/h) Heat generated Q (W/m³) Clearance index I C NAW< 0,001-< 1 SRM0,001 < D < 2< 10> 1 CRM2 < D < 20< 10> 1 PDW> 20> 10> 1 Actual Limits Melting facilities 200 Bq/g (average) Fusion classification Operator: 20mSv/y Public: 10µSv/y Transport: 2 mSv/h (contact); 0,1 mSv/h (at 2m) Dose rate

NAWSRMCRMPDW RECYCLING EXTENSION of RECYCLING Non- RECYCLED HORRHR 10 µSv/h2 mSv/h1µSv/h10 mSv/h20 mSv/h Recycling of fusion materials Hands On RecyclingRemote Handling Recycling Del. 2: Activity limits

Case study of defined limits for HOR Melting facilities → 1000 Bq/g ► 4 µSv/h ► 6.4 mSv/y Other Doc’s → 10 µSv/h ► 16 mSv/y (1600 h, full exposure) Full exposure = 8 hours a day, 200 working days a year Simulation 10% exposure ► 125 µSv/h as limit value! Del. 2: Activity limits

Remote Handling Facilities Del. 2: Activity limits Activation analyses (PPCS Model AB) → maximum dose rates up to 1.2 E4 Sv/h (10 days decay) Hot cell facilities at SCKCEN: Laboratory for Low and High Activities Hot cell BR2 Building for Vitrified waste at Belgoprocess → dose rates up to 1.4 E4 Sv/h.

NAWSRMCRMPDW HORRHR 1µSv/h100 µSv/h 20 mSv/h NAWSRMCRMPDW HORRHR Del. 2: Activity limits OR

The limits defined in the past can be increased for HOR. Since facilities exist for remote handling of high active materials the limit for RHR is higher than the dose rate of the fusion materials. Conclusions: Del. 2: Activity limits Draft report ► beginning of July

MONITORING MEETING Deliverable 2: Define the activity limits for the dismantling, melting, fabrication or reuse and waste. Deliverable 7: Define the categories of materials based on the different paths in the material cycle of a fusion reactor. Deliverable 8a: Define the R&D needs.

Del. 7: Material paths Model A WCLL Model B HCPB Model AB HCLL BLANKET Li-Pb EUROFER B Li4SiO4 Be EUROFER Li-Pb EUROFER DIVERTOR CuCrZr W WC W W alloy EUROFER W alloy EUROFER W IN VESSEL SHIELDEUROFER EUROFER ZrH1,6 HTS : EUROFER LTS : EUROFER + WC VACCUM VESSEL SS B Materials used in the different plant models

Del. 7: Material paths

Model AB: W and W-alloy Model AB: same excercise to be performed Del. 7: Material paths

Divertor: 2,5 y Blanket: 5 y HTS: 5 y LiPb: 40 kton Eurofer: 10 kton 316SS: 40 kton Coil: 8 kton Replacement Scheme Decay storage Sort & Separate Recycle Del. 7: Material paths Melting Others Wet storage for 5 years, dust removal Interim Storage for 100 years Other strategies … Dose rate levels?

Del. 7: Material paths To do: Perform the exercise for Model AB Make material paths visible (scheme) Influence of recycling strategy on the material paths Identify R&D

MONITORING MEETING Deliverable 2: Define the activity limits for the dismantling, melting, fabrication or reuse and waste. Deliverable 7: Define the categories of materials based on the different paths in the material cycle of a fusion reactor. Deliverable 8a: Define the R&D needs.

Del. 8: R&D Separation Recycling Special bonding techniques Remote processes Melting, remote process Other techniques, for “exotic materials” like W, SiC/SiC, WC, W-alloy Influence of impurities

Del. 8: R&D General issues Fabrication Remote process Remote testing Storage and reuse Build up of activation products Influence on material properties when using recycled material. Influence of impurities. Tritium removal, capture… Secondary waste issue