{"id":3201,"date":"2026-09-15T20:02:57","date_gmt":"2026-09-15T18:02:57","guid":{"rendered":"https:\/\/energianucleare.eu\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/"},"modified":"2026-09-15T20:02:57","modified_gmt":"2026-09-15T18:02:57","slug":"x-energys-xe-100-accepted-into-uk-generic-design-assessment-process","status":"publish","type":"post","link":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/","title":{"rendered":"X-energy&#8217;s Xe-100 Accepted into UK Generic Design Assessment Process"},"content":{"rendered":"<p><strong>X-energy<\/strong> has announced that its advanced modular reactor, the <strong>Xe-100<\/strong>, has been formally accepted into the UK&#8217;s <strong>Generic Design Assessment<\/strong> (GDA) process. The acceptance officially initiates the regulatory review of the design by British authorities \u2014 a mandatory step before any site-specific operating licence can be issued.<\/p>\n<p>The GDA is the UK&#8217;s established regulatory pathway for new nuclear technologies. It assesses safety, physical security, safeguards, and environmental impact independently of any particular site. The review will be conducted by the <strong>Office for Nuclear Regulation<\/strong> (ONR), the Environment Agency, and Natural Resources Wales, with a conclusion expected by the end of 2029. After three years of in-depth technical work, the ONR will issue a Design Acceptance Confirmation and the Environment Agency a Statement of Design Acceptability.<\/p>\n<p>The <strong>Xe-100<\/strong> is a fourth-generation high-temperature gas-cooled reactor (HTGR) rated at 80 MWe per unit. It can be deployed in configurations of four to twelve modules, delivering a total output ranging from 320 to 960 MWe. The reactor produces both electricity and high-temperature heat and steam for industrial applications. Its fuel is <strong>TRISO-X<\/strong> \u2014 uranium particles coated in ceramic and carbonaceous layers capable of withstanding extremely high temperatures without melting, a feature that significantly enhances the reactor&#8217;s passive safety profile.<\/p>\n<p>Behind this application lies a broader agreement. In September 2025, <strong>Centrica<\/strong> and X-energy signed a Joint Development Agreement to build the UK&#8217;s first advanced nuclear fleet, with the stated goal of deploying up to <strong>6 GW<\/strong> of new nuclear capacity nationwide. The preferred site for the first plant is <strong>Hartlepool<\/strong>, where a twelve-unit configuration delivering a total of 960 MWe is planned. Between the signing of that agreement and today, both companies completed their early engagement with regulators and submitted the formal GDA entry application \u2014 which has now been accepted.<\/p>\n<p>The process will also benefit from collaboration between the ONR and the US Nuclear Regulatory Commission (NRC), which allows for the direct transfer of design documentation and safety analyses already developed in the United States. X-energy has been engaged in the American licensing process for some time, and that body of work can now be leveraged in the UK review, reducing duplication and improving overall process efficiency. The company estimates the total economic value of the fleet over its lifetime at a minimum of \u00a340 billion, with around \u00a312 billion generated by the first project alone.<\/p>\n<p>The UK has long-standing familiarity with gas-cooled reactors: eight Advanced Gas-Cooled Reactors remain in operation across the country, a technology that shares fundamental principles with X-energy&#8217;s HTGR. This technical and regulatory heritage could facilitate productive dialogue between the company and the authorities. If the GDA concludes on schedule, by 2029 the <strong>Xe-100<\/strong> could have all the regulatory groundwork in place to move into the site-specific authorisation phase \u2014 with Hartlepool set to be the first real proving ground for Britain&#8217;s new generation of modular reactors.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>X-energy&#8217;s Xe-100 advanced modular reactor has been formally accepted into the UK&#8217;s Generic Design Assessment process, launching the regulatory review required before any site-specific operating licence can be granted. Centrica and X-energy are targeting up to 6 GW of new nuclear capacity across Britain in the coming years.<\/p>\n","protected":false},"author":25,"featured_media":3198,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-3201","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>X-energy&#039;s Xe-100 Accepted into UK Generic Design Assessment Process - Energia nucleare<\/title>\n<meta name=\"description\" content=\"X-energy&#039;s Xe-100 accepted into UK GDA: the Gen IV SMR begins regulatory review for deployment of up to 6 GW of nuclear capacity in Britain.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"X-energy&#039;s Xe-100 Accepted into UK Generic Design Assessment Process - Energia nucleare\" \/>\n<meta property=\"og:description\" content=\"X-energy&#039;s Xe-100 accepted into UK GDA: the Gen IV SMR begins regulatory review for deployment of up to 6 GW of nuclear capacity in Britain.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/\" \/>\n<meta property=\"og:site_name\" content=\"Energia nucleare\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-15T18:02:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/energianucleare.eu\/wp-content\/uploads\/2026\/09\/publish_9c359011240040119a545fa3a4e6b8d7.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1536\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Redazione Energia Nucleare\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Redazione Energia Nucleare\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/\"},\"author\":{\"name\":\"Redazione Energia Nucleare\",\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/#\\\/schema\\\/person\\\/2c3f466ad139658dfa60c575cf287fb7\"},\"headline\":\"X-energy&#8217;s Xe-100 Accepted into UK Generic Design Assessment Process\",\"datePublished\":\"2026-09-15T18:02:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/\"},\"wordCount\":479,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/energianucleare.eu\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/publish_9c359011240040119a545fa3a4e6b8d7.jpg\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/\",\"url\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/\",\"name\":\"X-energy's Xe-100 Accepted into UK Generic Design Assessment Process - Energia nucleare\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/energianucleare.eu\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/publish_9c359011240040119a545fa3a4e6b8d7.jpg\",\"datePublished\":\"2026-09-15T18:02:57+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/#\\\/schema\\\/person\\\/2c3f466ad139658dfa60c575cf287fb7\"},\"description\":\"X-energy's Xe-100 accepted into UK GDA: the Gen IV SMR begins regulatory review for deployment of up to 6 GW of nuclear capacity in Britain.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/#primaryimage\",\"url\":\"https:\\\/\\\/energianucleare.eu\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/publish_9c359011240040119a545fa3a4e6b8d7.jpg\",\"contentUrl\":\"https:\\\/\\\/energianucleare.eu\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/publish_9c359011240040119a545fa3a4e6b8d7.jpg\",\"width\":1536,\"height\":1024},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"X-energy&#8217;s Xe-100 Accepted into UK Generic Design Assessment Process\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/\",\"name\":\"Energia nucleare\",\"description\":\"Notizie sul nucleare\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/#\\\/schema\\\/person\\\/2c3f466ad139658dfa60c575cf287fb7\",\"name\":\"Redazione Energia Nucleare\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/f7573bf636adfceb968c63d469c0889af0a78eb4935f321c17f76df121e056a6?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/f7573bf636adfceb968c63d469c0889af0a78eb4935f321c17f76df121e056a6?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/f7573bf636adfceb968c63d469c0889af0a78eb4935f321c17f76df121e056a6?s=96&d=mm&r=g\",\"caption\":\"Redazione Energia Nucleare\"},\"url\":\"https:\\\/\\\/energianucleare.eu\\\/en\\\/author\\\/redazione\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"X-energy's Xe-100 Accepted into UK Generic Design Assessment Process - Energia nucleare","description":"X-energy's Xe-100 accepted into UK GDA: the Gen IV SMR begins regulatory review for deployment of up to 6 GW of nuclear capacity in Britain.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/","og_locale":"en_US","og_type":"article","og_title":"X-energy's Xe-100 Accepted into UK Generic Design Assessment Process - Energia nucleare","og_description":"X-energy's Xe-100 accepted into UK GDA: the Gen IV SMR begins regulatory review for deployment of up to 6 GW of nuclear capacity in Britain.","og_url":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/","og_site_name":"Energia nucleare","article_published_time":"2026-09-15T18:02:57+00:00","og_image":[{"width":1536,"height":1024,"url":"https:\/\/energianucleare.eu\/wp-content\/uploads\/2026\/09\/publish_9c359011240040119a545fa3a4e6b8d7.jpg","type":"image\/jpeg"}],"author":"Redazione Energia Nucleare","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Redazione Energia Nucleare","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/#article","isPartOf":{"@id":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/"},"author":{"name":"Redazione Energia Nucleare","@id":"https:\/\/energianucleare.eu\/en\/#\/schema\/person\/2c3f466ad139658dfa60c575cf287fb7"},"headline":"X-energy&#8217;s Xe-100 Accepted into UK Generic Design Assessment Process","datePublished":"2026-09-15T18:02:57+00:00","mainEntityOfPage":{"@id":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/"},"wordCount":479,"commentCount":0,"image":{"@id":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/#primaryimage"},"thumbnailUrl":"https:\/\/energianucleare.eu\/wp-content\/uploads\/2026\/09\/publish_9c359011240040119a545fa3a4e6b8d7.jpg","inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/","url":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/","name":"X-energy's Xe-100 Accepted into UK Generic Design Assessment Process - Energia nucleare","isPartOf":{"@id":"https:\/\/energianucleare.eu\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/#primaryimage"},"image":{"@id":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/#primaryimage"},"thumbnailUrl":"https:\/\/energianucleare.eu\/wp-content\/uploads\/2026\/09\/publish_9c359011240040119a545fa3a4e6b8d7.jpg","datePublished":"2026-09-15T18:02:57+00:00","author":{"@id":"https:\/\/energianucleare.eu\/en\/#\/schema\/person\/2c3f466ad139658dfa60c575cf287fb7"},"description":"X-energy's Xe-100 accepted into UK GDA: the Gen IV SMR begins regulatory review for deployment of up to 6 GW of nuclear capacity in Britain.","breadcrumb":{"@id":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/#primaryimage","url":"https:\/\/energianucleare.eu\/wp-content\/uploads\/2026\/09\/publish_9c359011240040119a545fa3a4e6b8d7.jpg","contentUrl":"https:\/\/energianucleare.eu\/wp-content\/uploads\/2026\/09\/publish_9c359011240040119a545fa3a4e6b8d7.jpg","width":1536,"height":1024},{"@type":"BreadcrumbList","@id":"https:\/\/energianucleare.eu\/en\/x-energys-xe-100-accepted-into-uk-generic-design-assessment-process\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/energianucleare.eu\/en\/"},{"@type":"ListItem","position":2,"name":"X-energy&#8217;s Xe-100 Accepted into UK Generic Design Assessment Process"}]},{"@type":"WebSite","@id":"https:\/\/energianucleare.eu\/en\/#website","url":"https:\/\/energianucleare.eu\/en\/","name":"Energia nucleare","description":"Notizie sul nucleare","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/energianucleare.eu\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/energianucleare.eu\/en\/#\/schema\/person\/2c3f466ad139658dfa60c575cf287fb7","name":"Redazione Energia Nucleare","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/f7573bf636adfceb968c63d469c0889af0a78eb4935f321c17f76df121e056a6?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/f7573bf636adfceb968c63d469c0889af0a78eb4935f321c17f76df121e056a6?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/f7573bf636adfceb968c63d469c0889af0a78eb4935f321c17f76df121e056a6?s=96&d=mm&r=g","caption":"Redazione Energia Nucleare"},"url":"https:\/\/energianucleare.eu\/en\/author\/redazione\/"}]}},"_links":{"self":[{"href":"https:\/\/energianucleare.eu\/en\/wp-json\/wp\/v2\/posts\/3201","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/energianucleare.eu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/energianucleare.eu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/energianucleare.eu\/en\/wp-json\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"https:\/\/energianucleare.eu\/en\/wp-json\/wp\/v2\/comments?post=3201"}],"version-history":[{"count":0,"href":"https:\/\/energianucleare.eu\/en\/wp-json\/wp\/v2\/posts\/3201\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/energianucleare.eu\/en\/wp-json\/wp\/v2\/media\/3198"}],"wp:attachment":[{"href":"https:\/\/energianucleare.eu\/en\/wp-json\/wp\/v2\/media?parent=3201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/energianucleare.eu\/en\/wp-json\/wp\/v2\/categories?post=3201"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/energianucleare.eu\/en\/wp-json\/wp\/v2\/tags?post=3201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}