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This paper discusses the computational and experimental techniques adopted for clearing from regulatory control the superconducting acceleration system of the former CERN Large Electron Positron collider (LEP), consisting of nearly 450 tons of valuable metals. The paper first briefly recalls the major sources of activation at high-energy electron accelerators and then discusses the general process, the computational tools employed, the methods to determine the amount of radionuclides that cannot be measured by γ -spectrometry, the selection of samples representative of the whole equipment and the outcome of the operational phase. The process ended up with the clearance of 95% of the material. The aim of this work is to provide a practical example of an approach that could be applicable to similar projects targeting radiological clearance of high-energy particle accelerator equipment. Duchemin, Charlotte; Magistris, Matteo; Pozzi, Fabio; Silari, Marco; Theis, Chris; Vincke, Helmut" /> <meta name="keywords" content="Accelerator decommissioning, Clearance of material, Gamma spectrometry, Induced radioactivity, Monte Carlo simulations, ActiWiz calculations" /> <script type="text/javascript" src="https://cds.cern.ch/js/jquery.min.js"></script>  <link rel="stylesheet" href="https://cds.cern.ch/img/webnews.css" type="text/css" />  <script type="text/javascript" src="https://cds.cern.ch/js/webnews.js?v=20131009"></script> <meta property="fb:app_id" content="137353533001720"/> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ tex2jax: {inlineMath: [['$','$']], processEscapes: true}, showProcessingMessages: false, messageStyle: "none" }); </script> <script src="/MathJax/MathJax.js?config=TeX-AMS_CHTML" type="text/javascript"> </script>  <meta content="Elsevier : Radiological clearance of equipment from high-energy electron accelerators: The example of LEP superconducting acceleration system" name="citation_title" /> <meta content="Duchemin, Charlotte" name="citation_author" /> <meta content="Magistris, Matteo" name="citation_author" /> <meta content="Theis, Chris" name="citation_author" /> <meta content="Pozzi, Fabio" name="citation_author" /> <meta content="Silari, Marco" name="citation_author" /> <meta content="Vincke, Helmut" name="citation_author" /> <meta content="10.1016/j.nima.2018.11.139" name="citation_doi" /> <meta content="Nucl. 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Res., A" name="citation_journal_title" /> <meta content="919" name="citation_volume" /> <meta content="42-55" name="citation_firstpage" /> <meta content="2019" name="citation_publication_date" /> <meta name="citation_online_date" content="2019/07/24"> <meta content="10.1016/j.nima.2018.11.139" name="citation_doi" />  <meta content="Elsevier" property="og:title" /> <meta content="Radiological clearance of equipment from high-energy electron accelerators: The example of LEP superconducting acceleration system" property="og:title" /> <meta content="website" property="og:type" /> <meta content="https://cds.cern.ch/record/2683828" property="og:url" /> <meta content="CERN Document Server" property="og:site_name" /> <meta content="Elsevier" property="og:description" /> <meta content="The lifespan of a particle accelerator includes its final decommissioning and the disposal of potentially activated materials, one of the major challenges faced at accelerator laboratories. This paper discusses the computational and experimental techniques adopted for clearing from regulatory control the superconducting acceleration system of the former CERN Large Electron Positron collider (LEP), consisting of nearly 450 tons of valuable metals. The paper first briefly recalls the major sources of activation at high-energy electron accelerators and then discusses the general process, the computational tools employed, the methods to determine the amount of radionuclides that cannot be measured by γ -spectrometry, the selection of samples representative of the whole equipment and the outcome of the operational phase. The process ended up with the clearance of 95% of the material. The aim of this work is to provide a practical example of an approach that could be applicable to similar projects targeting radiological clearance of high-energy particle accelerator equipment." property="og:description" />  <meta content="summary" name="twitter:card" /> <style></style> </head> <body class="CERN32Document32Server search" lang="sv">  <div id="cern-toolbar"> <h1><a href="http://cern.ch" title="CERN">CERN <span>Accelerating science</span></a></h1> <ul> <li class="cern-accountlinks"><a class="cern-account" href="https://cds.cern.ch/youraccount/login?ln=sv&referer=https%3A//cds.cern.ch/record/2683828%3Fln%3Dsv" title="Sign in to your CERN account">Sign in</a></li> <li><a class="cern-directory" href="http://cern.ch/directory" title="Search CERN resources and browse the directory">Directory</a></li> </ul> </div>   <div role="banner" class="clearfix" id="header"> <div class="header-inner inner"> <hgroup class="clearfix"> <h2 id="site-name"> <a rel="home" title="Home" href="/"><span>CERN Document Server</span></a> </h2> <h3 id="site-slogan">Access articles, reports and multimedia content in HEP</h3> </hgroup> <div role="navigation" id="main-navigation" class="cdsmenu"> <h2 class="element-invisible">Main menu</h2><ul class="links inline clearfix"> <li class="menu-386 first active-trail"><a class="active-trail" href="https://cds.cern.ch/?ln=sv">Sök</a></li> <li class="menu-444 "><a class="" title="" href="https://cds.cern.ch/submit?ln=sv">Skicka in</a></li> <li class="menu-426 "><a class="" href="https://cds.cern.ch/help/?ln=sv">Hjälp</a></li> <li class="leaf hassubcdsmenu"> <a hreflang="en" class="header" href="https://cds.cern.ch/youraccount/display?ln=sv">Personifiera</a> <ul class="subsubcdsmenu"><li><a href="https://cds.cern.ch/youralerts/list?ln=sv">Your alerts</a></li><li><a href="https://cds.cern.ch/yourbaskets/display?ln=sv">Your baskets</a></li><li><a href="https://cds.cern.ch/yourcomments?ln=sv">Your comments</a></li><li><a href="https://cds.cern.ch/youralerts/display?ln=sv">Your searches</a></li></ul></li> </ul> </div> </div> </div>  <table class="navtrailbox"> <tr> <td class="navtrailboxbody"> <a href="/?ln=sv" class="navtrail">Hem</a> > Radiological clearance of equipment from high-energy electron accelerators: The example of LEP superconducting acceleration system </td> </tr> </table> </div> <div class="pagebody"><div class="pagebodystripemiddle"> <div class="detailedrecordbox"> <div class="detailedrecordtabs"> <div> <ul class="detailedrecordtabs"><li class="on first"><a href="/record/2683828/?ln=sv">Information </a></li><li class="disabled"><a>Files </a></li></ul> <div id="tabsSpacer" style="clear:both;height:0px"> </div></div> </div> <div class="detailedrecordboxcontent"> <div class="top-left-folded"></div> <div class="top-right-folded"></div> <div class="inside">  <abbr class="unapi-id" title="2683828"></abbr> <style type="text/css">  </style> <table class="formatRecordTableFullWidth" > <tr> <td class="formatRecordHeader" style="background-image: url('https://cds.cern.ch/img/journals.jpg');" colspan="2">  <a style="color:#fff;text-decoration:none" href="https://cds.cern.ch/collection/Published%20Articles">Published Articles</a> </td> </tr> <script type="text/javascript"> $( document ).ready(function() { $('.showAuthor').on('click', function() { var author = '<p>' + $(this).data('name') + '</p>'; var affiliation = $(this).data('affiliation') + '</br>'; var contribution = $(this).data('contribution') + '</br>'; $.magnificPopup.open({ items: { src: '<div id="ovelary-mathjax" class="overlay-white oc-content overlay-white-500">' + author + affiliation + contribution + '</div>', type: 'inline' }, callbacks: { open: function() { var div = document.getElementById("overlay-mathjax") MathJax.Hub.Queue(["Typeset", MathJax.Hub, div]); }, } }) }) }); </script> <tr><td class="formatRecordLabel"> Title </td><td style="padding-left:5px;"><b>Radiological clearance of equipment from high-energy electron accelerators: The example of LEP superconducting acceleration system</b></td></tr> <tr><td class="formatRecordLabel"><span style="white-space:nowrap;"> Author(s) </span> </td><td style="padding-left:5px;"><a href="https://cds.cern.ch/search?f=author&p=Duchemin%2C%20Charlotte&ln=sv">Duchemin, Charlotte</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Magistris%2C%20Matteo&ln=sv">Magistris, Matteo</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Pozzi%2C%20Fabio&ln=sv">Pozzi, Fabio</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Silari%2C%20Marco&ln=sv">Silari, Marco</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Theis%2C%20Chris&ln=sv">Theis, Chris</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Vincke%2C%20Helmut&ln=sv">Vincke, Helmut</a> (CERN)</td></tr> <tr><td class="formatRecordLabel"> Publication </td><td style="padding-left:5px;">2019</td></tr> <tr><td class="formatRecordLabel"> Number of pages </td><td style="padding-left:5px;">14</td></tr> <tr><td class="formatRecordLabel"> In: </td><td style="padding-left:5px;"><a href="http://dx.doi.org/10.1016/j.nima.2018.11.139"><i>Nucl. Instrum. Methods Phys. Res., A</i> 919 (2019) 42-55</a> </a></td></tr> <tr><td class="formatRecordLabel"> DOI </td><td style="padding-left:5px;"><a href="http://dx.doi.org/10.1016/j.nima.2018.11.139" title="DOI" target="_blank">10.1016/j.nima.2018.11.139</a> <tr><td class="formatRecordLabel"> Subject category </td><td style="padding-left:5px;">Accelerators and Storage Rings</td></tr> <tr><td class="formatRecordLabel"> Abstract </td><td style="padding-left:5px;">The lifespan of a particle accelerator includes its final decommissioning and the disposal of potentially activated materials, one of the major challenges faced at accelerator laboratories. This paper discusses the computational and experimental techniques adopted for clearing from regulatory control the superconducting acceleration system of the former CERN Large Electron Positron collider (LEP), consisting of nearly 450 tons of valuable metals. The paper first briefly recalls the major sources of activation at high-energy electron accelerators and then discusses the general process, the computational tools employed, the methods to determine the amount of radionuclides that cannot be measured by γ -spectrometry, the selection of samples representative of the whole equipment and the outcome of the operational phase. The process ended up with the clearance of 95% of the material. The aim of this work is to provide a practical example of an approach that could be applicable to similar projects targeting radiological clearance of high-energy particle accelerator equipment.</td></tr> <tr><td class="formatRecordLabel"> Copyright/License </td><td style="padding-left:5px;">Elsevier B.V.</td></tr> </table> <br/>Corresponding record in: <a href="http://inspirehep.net/record/1711482">Inspire</a> <small> </small> <br/> <br/><br/><div align="right"><div style="padding-bottom:2px;padding-top:30px;"><span class="moreinfo" style="margin-right:10px;"> <a href="" class="moreinfo">Back to search</a> </span></div></div> <div class="bottom-left-folded"><div class="recordlastmodifiedbox" style="position:relative;margin-left:1px"> Journalen skapades 2019-07-24, och modifierades senast 2019-07-24</div></div> <div class="bottom-right-folded" style="text-align:right;padding-bottom:2px;"> <span class="moreinfo" style="margin-right:10px;"><a href="/search?ln=sv&p=recid%3A2683828&rm=wrd" class="moreinfo">Similar records</a></span></div> </div> </div> </div> <br/> <br /> <div class="detailedrecordminipanel"> <div class="top-left"></div><div class="top-right"></div> <div class="inside"> <div id="detailedrecordminipanelfile" style="width:33%;float:left;text-align:center;margin-top:0"> <br/> </div> <div id="detailedrecordminipanelreview" style="width:30%;float:left;text-align:center"> </div> <div id="detailedrecordminipanelactions" style="width:36%;float:right;text-align:right;"> <ul class="detailedrecordactions"> <li><a href="/yourbaskets/add?ln=sv&recid=2683828">Add to personal basket</a></li> <li>Exportera <a style="text-decoration:underline;font-weight:normal" href="/record/2683828/export/hx?ln=sv">BibTeX</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2683828/export/hm?ln=sv">MARC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2683828/export/xm?ln=sv">MARCXML</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2683828/export/xd?ln=sv">DC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2683828/export/xe?ln=sv">EndNote</a>,  <a style="text-decoration:underline;font-weight:normal" href="/record/2683828/export/xn?ln=sv">NLM</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2683828/export/xw?ln=sv">RefWorks</a> </li> </ul> <div style='padding-left: 13px;'>  <div id="bookmark"></div> <div id="bookmark_sciencewise"></div> <style type="text/css"> #bookmark_sciencewise, #bookmark {float: left;} #bookmark_sciencewise li {padding: 2px; width: 25px;} #bookmark_sciencewise ul, #bookmark ul {list-style-image: none;} </style> <script type="text/javascript" src="/js/jquery.bookmark.min.js"></script> <style type="text/css">@import "/css/jquery.bookmark.css";</style> <script type="text/javascript">// <![CDATA[ $.bookmark.addSite('sciencewise', 'ScienceWise.info', 'https://cds.cern.ch/img/sciencewise.png', 'en', 'bookmark', 'http://sciencewise.info/bookmarks/cds:2683828/add'); $('#bookmark_sciencewise').bookmark({sites: ['sciencewise']}); $('#bookmark').bookmark({ sites: ['facebook', 'twitter', 'linkedin', 'google_plusone'], icons: '/img/bookmarks.png', url: 'https://cds.cern.ch/record/2683828', addEmail: true, title: "Radiological clearance of equipment from high-energy electron accelerators: The example of LEP superconducting acceleration system", description: "The lifespan of a particle accelerator includes its final decommissioning and the disposal of potentially activated materials, one of the major challenges faced at accelerator laboratories. This paper discusses the computational and experimental techniques adopted for clearing from regulatory control the superconducting acceleration system of the former CERN Large Electron Positron collider (LEP), consisting of nearly 450 tons of valuable metals. The paper first briefly recalls the major sources of activation at high-energy electron accelerators and then discusses the general process, the computational tools employed, the methods to determine the amount of radionuclides that cannot be measured by \u03b3 -spectrometry, the selection of samples representative of the whole equipment and the outcome of the operational phase. The process ended up with the clearance of 95% of the material. 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