{"id":1940,"date":"2026-07-01T12:00:00","date_gmt":"2026-07-01T12:00:00","guid":{"rendered":"https:\/\/imffluid.kinsta.cloud\/?p=1940"},"modified":"2026-11-09T10:19:47","modified_gmt":"2026-11-09T10:19:47","slug":"nuclear-certification-update","status":"publish","type":"post","link":"https:\/\/imffluid.kinsta.cloud\/en\/nuclear-certification-update\/","title":{"rendered":"Where does our nuclear certification stand?"},"content":{"rendered":"\n

An operator of hydrogen refuelling stations for heavy vehicles needed a pressure regulator that could deliver stable pressure from 700 bar storage outdoors at temperatures down to \u221240 \u00b0C. No catalogue model met all the requirements.<\/p>\n\n\n\n

We started with the D973<\/a>, our high-pressure regulator, is rated for 700 bar inlet pressure with BSPP connections and 1,000 bar with 3\/8" OD SFX. We still had to adapt it to low temperatures, the station's pressure cycles and hydrogen leak-tightness requirements.<\/p>\n\n\n\n

The specification.<\/h2>\n\n\n\n
Parameter<\/th>Requirement<\/th><\/tr><\/thead>
Fluid<\/th>Gaseous hydrogen<\/td><\/tr>
Inlet pressure<\/th>700 bar<\/td><\/tr>
Ambient temperature<\/th>Down to \u221240 \u00b0C, outdoor installation<\/td><\/tr>
Body<\/th>316L stainless steel<\/td><\/tr>
Leak tightness<\/th>Int. 10\u207b\u00b3 \u00b7 ext. 10\u207b\u2074 mbar\u00b7l\/s, helium<\/td><\/tr>
Upstream filtration<\/th>10 \u00b5m<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Five steps,
fourteen weeks.<\/h2>\n\n\n\n
    \n
  1. Review the requirements with the operator and select the D973 as the starting model.<\/li>\n\n\n\n
  2. Adapt the materials: 316L body, PCTFE seat and seals qualified for low temperatures.<\/li>\n\n\n\n
  3. Machine and assemble the prototype in Andilly.<\/li>\n\n\n\n
  4. Test helium leak tightness, pressure cycling and cold resistance.<\/li>\n\n\n\n
  5. Complete site acceptance with the operator and hand over the documentation.<\/li>\n<\/ol>\n\n\n\n
    \"IMF
    Helium leak testing at the Andilly workshop.<\/figcaption><\/figure>\n\n\n\n
    \n

    \u201cStarting with a proven model let us focus on the two main changes: cold conditions and pressure cycling.\u201d<\/p>\nIMF engineering team<\/cite><\/blockquote>\n\n\n\n

    What we learned<\/h3>\n\n\n\n
      \n
    • Using a catalogue model as the starting point significantly shortens qualification.<\/li>\n\n\n\n
    • Cold conditions affect the choice of seals and seat as well as the body.<\/li>\n\n\n\n
    • Helium testing each component verifies hydrogen leak tightness.<\/li>\n<\/ul>\n\n\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"

      An update on IMF’s qualification for nuclear applications in coordination with the group.<\/p>\n","protected":false},"author":1,"featured_media":852,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[64],"tags":[],"class_list":["post-1940","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-certifications-news-en"],"acf":[],"_links":{"self":[{"href":"https:\/\/imffluid.kinsta.cloud\/en\/wp-json\/wp\/v2\/posts\/1940","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/imffluid.kinsta.cloud\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/imffluid.kinsta.cloud\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/imffluid.kinsta.cloud\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/imffluid.kinsta.cloud\/en\/wp-json\/wp\/v2\/comments?post=1940"}],"version-history":[{"count":1,"href":"https:\/\/imffluid.kinsta.cloud\/en\/wp-json\/wp\/v2\/posts\/1940\/revisions"}],"predecessor-version":[{"id":2010,"href":"https:\/\/imffluid.kinsta.cloud\/en\/wp-json\/wp\/v2\/posts\/1940\/revisions\/2010"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/imffluid.kinsta.cloud\/en\/wp-json\/wp\/v2\/media\/852"}],"wp:attachment":[{"href":"https:\/\/imffluid.kinsta.cloud\/en\/wp-json\/wp\/v2\/media?parent=1940"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/imffluid.kinsta.cloud\/en\/wp-json\/wp\/v2\/categories?post=1940"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/imffluid.kinsta.cloud\/en\/wp-json\/wp\/v2\/tags?post=1940"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}