Implementation of a new gamma spectrometer on the MERARG loop Application to the volatile fission products release measurement.

B. Cornu (1) , S. Bernard (1) , Yves Pontillon (1) , B. Gleizes (1) , E. Hanus (1) , G. Ducros (1) , C. Roure (1)

1 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)

The MERARG facility initially aims at the annealing of irradiated fuel samples to study the gaseous fission products release kinetics. In order to complete the evaluation of the source term potentially released during accidental situation, the MERARG experimental circuit has been enhanced with a new gamma spectrometer. This one is directly sighting the fuel and is devoted to the fission products release kinetics. Because of the specificities of the fuel measurements, it has been dimensioned and designed to match the specific requirements. The acquisition chain and the collimation system have been optimized for this purpose and a first set of two experiments have shown the good functioning of this new spectrometry facility.

Keywords: gammma spectrometry; fission product; MERARG

Domains: Nuclear Experiment [nucl-ex]; Nuclear Theory [nucl-th]

B. Cornu, S. Bernard, Yves Pontillon, B. Gleizes, E. Hanus, et al.. Implementation of a new gamma spectrometer on the MERARG loop Application to the volatile fission products release measurement.. ANIMMA 2015 - International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications, Apr 2015, Lisbonne, Portugal. ⟨cea-02509259⟩