1CEA/DEN/CAD/DTN/STPA/LPC Kick off meeting 0ct. 09 - 2006 TW6-TSL-002 : ORE TBM OCCUPATIONAL RADIATION EXPOSURE.

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Presentation transcript:

1CEA/DEN/CAD/DTN/STPA/LPC Kick off meeting 0ct TW6-TSL-002 : ORE TBM OCCUPATIONAL RADIATION EXPOSURE

2CEA/DEN/CAD/DTN/STPA/LPC Kick off meeting 0ct TWO TYPES OF BREEDER BLANKET + Associated loops and components are concerned HCLLHCPB

3CEA/DEN/CAD/DTN/STPA/LPC Kick off meeting 0ct MAIN OBJECTIVES DR 5cm / 1m HCPB DR 5cm / 1m HCLL OCCUPATIONAL DOSE HCPB / HCLL OPERATIONAL, REPLACEMENT OR DECOMISSIONING

4CEA/DEN/CAD/DTN/STPA/LPC Kick off meeting 0ct MAIN STEPS ANALYSIS AND INTEGRATION OF GEOMETRY HCPB AND HCLL QUALITATIVE SPECIFIC ACTIVITY OF COMPONENTS QUANTITATIVE SPECIFIC ACTIVITY OF COMPONENTS SELECTION ACCORDING TO DOSIMETRY WEIGHT OF ACTIVATION PRODUCTS

5CEA/DEN/CAD/DTN/STPA/LPC Kick off meeting 0ct AVAILABLE DOSIMETRY CALCULATION TOOLS MICROSHIELD SIMPLE GEOMETRIES ONLY ONE RADIOACTIVE GEOMETRY MCNP (not foreseen in this task) COMPLEX GEOMETRIES MULTI RADIOACTIVE GEOMETRIES

6CEA/DEN/CAD/DTN/STPA/LPC Kick off meeting 0ct DOSIMETRY CALCULATION MICROSHIELD –Deterministic code –Definition of simple source geometry (sphere, cube, wall) –Only one radioactive source (including several radionuclides with all gamma rays of the selected nuclides) –Possible use of multi shields (with simple geometries) –Used by radiation protection groups at CEA –Output results: Dose rate Equivalent dose rate

7CEA/DEN/CAD/DTN/STPA/LPC Kick off meeting 0ct PREPARATION OF FIRST CALCULATIONS ON HCLL DR 5 cm / 1 m DR ß - 5 cm CHECK OF POTENTIAL IMPACT DR WITH ALREADY DEFINED SHIELDINGS

8CEA/DEN/CAD/DTN/STPA/LPC Kick off meeting 0ct DOSIMETRY CALCULATION NEEDED DATA FOR HCLL: –GEOMETRIES (OK) –SPECIFIC ACTIVITY: NEW VALUES MUST BE PROVIDED (including dosimetric weights) –SAME DATA THAN LAST TASK EXCEL FILE WITH ALL RN : –AT SHUTDOWN –5 DAYS –12 DAYS –1 YEAR FISPACT OUTPUT FILES COULD BE INTERESTING (with specific filter with 143 RNs)

9CEA/DEN/CAD/DTN/STPA/LPC Kick off meeting 0ct PREPARATION OF FIRST CALCULATION ON HCPB GEOMETRY DESCRIPTION DOCUMENTS MUST BE PROVIDED RADIOACTIVE SPECTRUM MUST BE DEFINED

10CEA/DEN/CAD/DTN/STPA/LPC Kick off meeting 0ct DOSIMETRY CALCULATION NEEDED DATA FOR HCPB: –GEOMETRIES –SPECIFIC ACTIVITY: NEW VALUES MUST BE PROVIDED (including dosimetric weights) –SAME DATA THAN LAST YEAR EXCEL FILE WITH ALL RN : –AT SHUTDOWN –5 DAYS –12 DAYS –1 YEAR FISPACT OUTPUT FILES COULD BE INTERESTING (with specific filter with 143 RNs)

11CEA/DEN/CAD/DTN/STPA/LPC Kick off meeting 0ct CONCLUSION CALCULATIONS WILL ALLOW TO RESPOND TO SAFETY CONCERNS AS A CONSERVATIVE APPROACH IS USED IT WILL GIVE AN INPUT DATA FOR DESIGN CHECK OF: –HOTCELLS AND RADWASTE, –TRANSPORT CASKS, … HOWEVER FOR BOTH HCLL AND HCPB THE LEVEL OF ENVELOPS COULD BE DIFFERENT