![\"B\u00e2timent](\"https:\/\/i0.wp.com\/www.stellaria.fr\/wp-content\/uploads\/2026\/01\/2026-01-21-ALVIN-DAC.webp?resize=800%2C450&quality=80&ssl=1\")
This is an important new milestone for Stellaria, as the signing of this letter of intent lays the foundations for Alvin, our critical experiment, scheduled for 2030 through the INB Alpha facility. The objectives to be achieved with Alvin are multiple, but it will notably allow us to validate our neutronics-thermohydraulic coupling modelling and calculations.<\/p>\n\n\n\n
A letter intent for what?<\/h2>\n\n\n\n
The letter of intent concerns INB Alpha, which encompasses both Alvin and MegAlvin. Indeed, by 2032, following the completion of our Alvin experimental programme, we plan to modify the facility to operate MegAlvin, our prototype reactor.<\/p>\n\n\n\n
It will be installed within the building used for the Alvin critical experiment, the main modification consisting of replacing certain systems as well as the vessel, with a larger one (approximately 40 to 100 cm).<\/p>\n\n\n\n
MegAlvin objectives:<\/strong><\/p>\n\n\n\n Long-duration irradiation of test specimens will enable the qualification of the mechanical properties of various materials under fast neutrons. This capability will be unique in Europe and available to other stakeholders (startups or national programmes). MegAlvin will notably provide data on fuel qualification and its evolution under irradiation, as well as the validation of our design of systems critical to the development of molten salt reactors, such as corrosion management and fission gas handling.<\/p>\n\n\n\n The CEA, a public research organisation, plays a key role in nuclear innovation \u2014 notably by supporting the French industrial sector, major research programmes, and more recently by accompanying France 2030 laureate projects through their development and industrialisation. The CEA's Cadarache centre, located in Saint-Paul-Lez-Durance (Bouches-du-Rh\u00f4ne), is dedicated to research platforms and technological development in low-carbon energies (fission nuclear, fusion nuclear, solar, bioenergies, biotechnologies, hydrogen).<\/p>\n\n\n\n <\/p>","protected":false},"excerpt":{"rendered":" Stellaria et le CEA annoncent la signature d’une Lettre d’Intention (LOI) relative \u00e0 l\u2019\u00e9tude de l\u2019implantation d\u2019une INB \u00ab ALPHA \u00bb h\u00e9bergeant une maquette, un r\u00e9acteur d\u00e9monstrateur \u00e0 combustible liquide (sels fondus) \u00e0 spectre rapide et une installation de fabrication des sels pour les besoins de la maquette et du r\u00e9acteur de d\u00e9monstration sur le centre […]<\/p>","protected":false},"author":247388730,"featured_media":5919,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2}},"categories":[6367,6387],"tags":[6397,6472,6406,6465,6471,6398],"post_folder":[],"class_list":["post-6523","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-communiques-de-presse","category-actualites","tag-alvin","tag-cadarache","tag-experience-critique","tag-inb-alpha","tag-lettre-dintention","tag-megalvin"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.stellaria.fr\/wp-content\/uploads\/2024\/12\/vignette-actu-ws.jpg?fit=1500%2C1500&quality=89&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pfPs4a-1Hd","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.stellaria.fr\/en\/wp-json\/wp\/v2\/posts\/6523","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stellaria.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.stellaria.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.stellaria.fr\/en\/wp-json\/wp\/v2\/users\/247388730"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stellaria.fr\/en\/wp-json\/wp\/v2\/comments?post=6523"}],"version-history":[{"count":7,"href":"https:\/\/www.stellaria.fr\/en\/wp-json\/wp\/v2\/posts\/6523\/revisions"}],"predecessor-version":[{"id":6534,"href":"https:\/\/www.stellaria.fr\/en\/wp-json\/wp\/v2\/posts\/6523\/revisions\/6534"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stellaria.fr\/en\/wp-json\/wp\/v2\/media\/5919"}],"wp:attachment":[{"href":"https:\/\/www.stellaria.fr\/en\/wp-json\/wp\/v2\/media?parent=6523"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.stellaria.fr\/en\/wp-json\/wp\/v2\/categories?post=6523"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.stellaria.fr\/en\/wp-json\/wp\/v2\/tags?post=6523"},{"taxonomy":"post_folder","embeddable":true,"href":"https:\/\/www.stellaria.fr\/en\/wp-json\/wp\/v2\/post_folder?post=6523"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n
MegAlvin in the service of science<\/h2>\n\n\n\n
Key milestones reached alongside the signing of the letter of intent<\/h2>\n\n\n\n
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<\/li>\n<\/ul>\n\n\n\nWhy sign a Letter of Intent with the CEA?<\/h2>\n\n\n\n
<\/p>\n\n\n\n