Abstract
The AMMON integral experiment was carried out in the EOLE critical mock-up at CEA Cadarache. It has been dedicated to the analysis of the Jules Horowitz Reactor (JHR) neutron and photon physics and has a very specific design in comparison with previous cores (MISTRAL, FUBILA, etc.) consisting in the loading of UOX or MOX fuel pins in EOLE. The core configurations consisted of an experimental zone of six or seven JHR-type assemblies with U3Si2–Al 27% 235U enriched curved fuel plates, surrounded by a driver zone with enough standard pressurized water reactor (PWR) UOX fuel pins to reach criticality. Five main configurations have been studied during this three-year ambitious program.The purpose of this paper is to synthesize the main features of this program in terms of experimental methods and associated uncertainties. Almost all the measurements have been analyzed with TRIPOLI-4® Monte Carlo reference calculations, using the JEFF-3.1.1 nuclear data library; this paper gives examples of the analysis of the critical states studied in the experiment as well as the analysis of the isothermal temperature coefficient.
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