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ASNR — Autorité de sûreté nucléaire et de radioprotection·FR·

PUMA : une coopération internationale pour faire progresser les connaissances en criticité nucléaire

PUMA : une coopération internationale pour faire progresser les connaissances en criticité nucléaire admin ven 16/10/2026 - 09:11 Introduction En 2026, l’ASNR a participé à une campagne d’expériences critiques menée sur le Nevada National Security Site aux États-Unis dans le cadre du projet PUMA (Plutonium Uranium Mixed Spectrum Applications). Fort de plus de dix années de coopération scientifique franco-américaine, cette campagne vise à améliorer les connaissances nécessaires à l’évaluation de la sûreté des installations mettant en œuvre des matières fissiles contenant du plutonium. En 2026, l’ASNR a participé à une campagne d’expériences critiques menée sur le National Criticality Experiments Research Center aux États-Unis dans le cadre du projet PUMA ( Plutonium Uranium Mixed spectrum Applications ). Fort de plus de dix années de coopération scientifique franco-américaine, cette campagne vise à améliorer les connaissances nécessaires à l’évaluation de la sûreté des installations mettant en œuvre des matières fissiles contenant du plutonium. Empilement de plaques combustibles en uranium et plutonium métalliques séparées de plaques de polyéthylène et d’aluminium, dans des proporti

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