{"id":2504,"date":"2019-10-02T11:15:24","date_gmt":"2019-10-02T09:15:24","guid":{"rendered":"https:\/\/www.orslabs.fr\/?page_id=2504"},"modified":"2025-06-22T15:17:24","modified_gmt":"2025-06-22T13:17:24","slug":"oneida-rad-equation","status":"publish","type":"page","link":"https:\/\/www.orslabs.fr\/en\/tools\/oneida-rad-equation\/","title":{"rendered":"Oneida RAD\u2122 Equation"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l8rta-33b83f4cff5753a42319c03b8605dba2\">\n.flex_column.av-l8rta-33b83f4cff5753a42319c03b8605dba2{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-l8rta-33b83f4cff5753a42319c03b8605dba2 av_one_full  avia-builder-el-0  el_before_av_one_full  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kkmy39jr-30524960fe9a95116b6249acbd6fad75\">\n#top .av-special-heading.av-kkmy39jr-30524960fe9a95116b6249acbd6fad75{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-kkmy39jr-30524960fe9a95116b6249acbd6fad75 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-kkmy39jr-30524960fe9a95116b6249acbd6fad75 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-kkmy39jr-30524960fe9a95116b6249acbd6fad75 av-special-heading-h1 blockquote modern-quote modern-centered  avia-builder-el-1  avia-builder-el-no-sibling  av-linked-heading'><h1 class='av-special-heading-tag'  itemprop=\"headline\"  >Oneida RAD<sup>\u2122<\/sup> Equation<\/h1><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-9hafy-a2cc44c9153b8dcf71486007e509bf21\">\n.flex_column.av-9hafy-a2cc44c9153b8dcf71486007e509bf21{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-9hafy-a2cc44c9153b8dcf71486007e509bf21 av_one_full  avia-builder-el-2  el_after_av_one_full  el_before_av_one_full  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-juns62qr-29265489c8a2cdc601afc8378972f510 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>This page is related the <a href=\"https:\/\/www.orslabs.fr\/en\/hermeticity\/kr85\/\">Krypton 85 (Kr85) leak testing<\/a>, as described in Mil-Std-883 TM-1014 and Mil-Std-750 Test Method 1071 documents.<\/p>\n<p>In order to measure the leak rate of hermetically sealed cavities, a pressurization is performed with a tracer gas containing small quantities of radioactive Kr85. This gas penetrates inside the cavity of the device. At the end of the pressurization, the radioactivity of the Kr85 trapped inside the cavity is measured, and is directly linked to the size of the leak.<\/p>\n<p>The &#8220;Oneida RAD\u2122 Equation&#8221; computes the measured radiation (Rad), for a leak showing purely molecular flow, as a function of the leak size (L), internal volume (V), pressurization parameters, tracer gas and radiation detection characteristics. This equation was established from gas molecular flow\u00a0 and radiation measurements equations and differs from the Radiflo equation generally used for Kr85 testing.<\/p>\n<p>The interactive form below helps you compute the Rad Pass\/Fail criteria based on your leak test parameters. The form also does the reverse computation (i.e. it computes the Total Leak Rate (L) from the Measured radiation (Rad)).<\/p>\n<p>The aim of this tool is also to compare the behavior of these two equations (&#8220;Oneida RAD\u2122&#8221; vs &#8220;Radiflo&#8221;).<\/p>\n<script type=\"text\/javascript\">\/\/ <![CDATA[\njQuery(document).ready(function(){\n\tsetInterval( function() { AutoiFrameAdjustiFrameHeight( 'Howl-Mann Equation', 50); }, 1000 );\n});\n\/\/ ]]><\/script>\n<iframe loading=\"lazy\" id=\"Howl-Mann Equation\" name=\"Howl-Mann Equation\" src=\"\/ors-tools\/oneida-rad.html\" width=\"100%\" height=\"auto\" frameborder=\"0\" scrolling=\"no\"onload=\"AutoiFrameAdjustiFrameHeight('Howl-Mann Equation',50);\"><\/iframe>\n<\/div><\/section><\/div><\/p>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-hoopa-dd3430e84116e57f9bcfce549bd726e0\">\n.flex_column.av-hoopa-dd3430e84116e57f9bcfce549bd726e0{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-hoopa-dd3430e84116e57f9bcfce549bd726e0 av_one_full  avia-builder-el-4  el_after_av_one_full  avia-builder-el-last  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-71lt2-675764c4947d63369759368ed5299d19 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><!-- &#091;auto-iframe link=\"\/ors-tools\/howl-mann.html\" tag=\"Howl-Mann Equation\" width=\"100%\" autosize=\"yes\"&#093; --><\/p>\n<div id=\"sconnect-is-installed\" style=\"display: none;\">2.5.0.0<\/div>\n<div id=\"sconnect-is-installed\" style=\"display: none;\">2.5.0.0<\/div>\n<div id=\"sconnect-is-installed\" style=\"display: none;\">2.5.0.0<\/div>\n<div id=\"sconnect-is-installed\" style=\"display: none;\">2.5.0.0<\/div>\n<div id=\"sconnect-is-installed\" style=\"display: none;\">2.5.0.0<\/div>\n<\/div><\/section><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":13,"featured_media":0,"parent":218,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-2504","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Oneida RAD\u2122 Equation | Oneida Research Services<\/title>\n<meta name=\"description\" content=\"Oneida RAD\u2122 Equation (Kr-85) is an interactive equation used to compute Fine Leak parameters for Krypton 85 Hermeticity testing.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.orslabs.fr\/en\/tools\/oneida-rad-equation\/\" \/>\n<meta property=\"og:locale\" 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