Safeguarding advanced Generation IV reprocessing facilities - - PowerPoint PPT Presentation

Safeguarding advanced Generation IV reprocessing facilities

Challenges, R&D needs, and development of measurements

• M. Åberg Lindell*, A. Håkansson, P. Andersson, S. Grape

Uppsala University * matilda.aberg-lindell@physics.uu.se

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Reprocessing and safeguards

• Challenges

– Extensive fuel handling – Various material types – Bulk handling facilities – Measurement uncertainties – Timeliness – Resource-intensive

Example: Rokkasho Reprocessing Plant

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Reprocessing and safeguards

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• DA samples
• On Site Lab
• IAEA inspector always present

 Resource intensive X

Gen IV recycling

• New fuel compositions
• Increased fuel handling
• Pyroprocessing

– Limited experience – Harsh environment in hot cells

• Aqueous reprocessing

– New flowsheets

• Demands large resources if widely implemented

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Example: GANEX

Gen IV recycling

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• Group ActiNide Extraction

(GANEX)

• No pure Pu stream
• MA-bearing fuel

X

Gen IV safeguards development

• Current R&D

– Complement traditional safeguards methods (e.g. C/S, DA) with new NDA technologies – Online and remote monitoring – Various spectroscopic technologies

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Planned photon measurements

• Measurements planned for late 2014

– At Chalmers University of Technology, Sweden

• Gamma radiation from dissolved spent LWR fuel

– BU: 41 GWd/tU, CT: 40 years – Fuel representing start-up phase of Gen IV system

• Laboratory scale Ganex process

– Measurement points

• Difficulties

– Fission products – Low gamma energies from actinides – Small quantities (~ 1 g) – low count rate

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Gen IV fuel cycle Example spectra Flowsheet

Gen IV fuel cycle

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X

GANEX flowsheet

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X

Example gamma spectra

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X

Dissolved fuel Extracted actinides with traces of FP

Actinides emit low-energy gammas

Performed simulations

• Preparation for measurements
• Modeling of:

– Fuel composition – Experimental setup – Radiation – Detector response

• Software

– Origen (Burn up and decay) – MCNP (Radiation and detector modeling)

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