{"id":873,"date":"2017-09-20T15:08:22","date_gmt":"2017-09-20T15:08:22","guid":{"rendered":"https:\/\/tst2.berangereaudebert.fr\/?p=873\/"},"modified":"2023-03-25T20:39:42","modified_gmt":"2023-03-25T18:39:42","slug":"quest-surete-nucleaire","status":"publish","type":"post","link":"https:\/\/www.test.suredyna.com\/fr\/quest-surete-nucleaire\/","title":{"rendered":"Qu\u2019est-ce que la s\u00fbret\u00e9\u00a0nucl\u00e9aire ?"},"content":{"rendered":"<p>La&nbsp;<b>s\u00fbret\u00e9 n<\/b><b>ucl\u00e9aire<\/b>&nbsp;est la&nbsp;<b>s\u00fbret\u00e9<\/b>&nbsp;appliqu\u00e9e \u00e0 l&rsquo;ensemble des activit\u00e9s impliquant des&nbsp;<b>mati\u00e8res radioactives<\/b>&nbsp;ou des&nbsp;<b>rayonnements ionisants<\/b>, en particulier :<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<ul>\n<li aria-setsize=\"-1\" data-aria-level=\"1\" data-aria-posinset=\"1\" data-listid=\"1\">tous les types de&nbsp;<b>r\u00e9acteurs nucl\u00e9aires<\/b>&nbsp;(<b>r\u00e9acteurs de puissance<\/b>&nbsp;pour la production d&rsquo;\u00e9lectricit\u00e9,&nbsp;<b>r\u00e9acteurs de recherche<\/b>, de&nbsp;<b>propulsion<\/b>, etc.) ;<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li aria-setsize=\"-1\" data-aria-level=\"1\" data-aria-posinset=\"2\" data-listid=\"1\">les installations du&nbsp;<b>cycle du combustible nucl\u00e9aire<\/b>&nbsp;(amont et aval) ;<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li aria-setsize=\"-1\" data-aria-level=\"1\" data-aria-posinset=\"3\" data-listid=\"1\">les&nbsp;<b>laboratoires chauds<\/b>&nbsp;et les&nbsp;<b>acc\u00e9l\u00e9rateurs de particules<\/b>&nbsp;;<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li aria-setsize=\"-1\" data-aria-level=\"1\" data-aria-posinset=\"4\" data-listid=\"1\">les installations d\u2019entreposage et de stockage de&nbsp;<b>d\u00e9chets nucl\u00e9aires<\/b>&nbsp;;<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li aria-setsize=\"-1\" data-aria-level=\"1\" data-aria-posinset=\"5\" data-listid=\"1\">les installations nucl\u00e9aires en&nbsp;<b>d\u00e9mant\u00e8lement<\/b>&nbsp;de tous types ;<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li aria-setsize=\"-1\" data-aria-level=\"1\" data-aria-posinset=\"6\" data-listid=\"1\">les&nbsp;<b>transports de mati\u00e8res radioactives<\/b>&nbsp;de tous types ;<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li aria-setsize=\"-1\" data-aria-level=\"1\" data-aria-posinset=\"7\" data-listid=\"1\">les activit\u00e9s (notamment m\u00e9dicales) impliquant des&nbsp;<b>sources radioactives<\/b>.<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<\/ul>\n<p>Ainsi, d&rsquo;apr\u00e8s l&rsquo;<a href=\"http:\/\/www.legifrance.gouv.fr\/affichCodeArticle.do;jsessionid=C574411C9179773E6333084C7C964FA7.tpdjo03v_1?idArticle=LEGIARTI000025108609&amp;cidTexte=LEGITEXT000006074220&amp;dateTexte=20171002\">Article L591-1 du code fran\u00e7ais de l&rsquo;environnement<\/a>,&nbsp;<i>La s\u00fbret\u00e9 nucl\u00e9aire est l&rsquo;ensemble des dispositions techniques et des mesures d&rsquo;organisation relatives \u00e0 la conception, \u00e0 la construction, au fonctionnement, \u00e0 l&rsquo;arr\u00eat et au d\u00e9mant\u00e8lement des installations nucl\u00e9aires de base ainsi qu&rsquo;au transport des substances radioactives, prises en vue de pr\u00e9venir les accidents ou d&rsquo;en limiter les effets.<\/i>&nbsp;<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<p>Dans le secteur nucl\u00e9aire, la s\u00fbret\u00e9 se distingue de deux autres notions, importantes et compl\u00e9mentaires :<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<ul>\n<li aria-setsize=\"-1\" data-aria-level=\"1\" data-aria-posinset=\"8\" data-listid=\"2\">la&nbsp;<b>Radioprotection<\/b>&nbsp;;<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li aria-setsize=\"-1\" data-aria-level=\"1\" data-aria-posinset=\"9\" data-listid=\"2\">la&nbsp;<b>S\u00e9curit\u00e9 des Mati\u00e8res<\/b>&nbsp;nucl\u00e9aires (protection contre la prolif\u00e9ration).<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<\/ul>\n<p>Apr\u00e8s une d\u00e9finition de l&rsquo;<i>objectif<\/i>&nbsp;de la&nbsp;<i>S\u00fbret\u00e9 Nucl\u00e9aire<\/i>, nous nous int\u00e9resserons \u00e0 l&rsquo;approche particuli\u00e8re de&nbsp;<i>D\u00e9fense en Profondeur<\/i>&nbsp;pour finir avec les&nbsp;<a href=\"http:\/\/www-pub.iaea.org\/MTCD\/publications\/PDF\/P1273_F_web.pdf\">Principes Fondamentaux de S\u00fbret\u00e9<\/a>&nbsp;de l&rsquo;AIEA (Agence Internationale de l&rsquo;\u00e9nergie Atomique) qui nous conduiront ensuite aux&nbsp;Cadre et Exigences R\u00e9glementaires&nbsp;pour les solutions de s\u00fbret\u00e9 nucl\u00e9aire.<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<h2>Objectif g\u00e9n\u00e9ral de la S\u00fbret\u00e9 Nucl\u00e9aire<\/h2>\n<p>D&rsquo;apr\u00e8s les&nbsp;<a href=\"http:\/\/www-pub.iaea.org\/MTCD\/publications\/PDF\/P1273_F_web.pdf\">Principes Fondamentaux de S\u00fbret\u00e9<\/a>&nbsp;de l&rsquo;AIEA, l&rsquo;<b>objectif fondamental de s\u00fbret\u00e9<\/b>&nbsp;est de&nbsp;<b>prot\u00e9ger les personnes et&nbsp;<\/b><b>l\u2019environnement contre les effets nocifs des rayonnements ionisants<\/b>.<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<p>Pour que les installations soient exploit\u00e9es et les activit\u00e9s effectu\u00e9es de mani\u00e8re \u00e0 r\u00e9pondre aux normes de s\u00fbret\u00e9 les plus rigoureuses pouvant raisonnablement \u00eatre appliqu\u00e9es, il faut prendre des mesures pour :<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<ol>\n<li><i>contr\u00f4ler la&nbsp;<\/i><i>radioexposition<\/i><i>&nbsp;des personnes et les rejets de mati\u00e8res radioactives dans l\u2019environnement ;<\/i><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li><i>restreindre la probabilit\u00e9 d\u2019\u00e9v\u00e9nements pouvant entra\u00eener la perte de contr\u00f4le du&nbsp;<\/i><i>coeur<\/i><i>&nbsp;d\u2019un r\u00e9acteur nucl\u00e9aire, d\u2019une r\u00e9action en cha\u00eene, d\u2019une source radioactive ou de toute autre source de rayonnements ;<\/i><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li><i>att\u00e9nuer les cons\u00e9quences de tels \u00e9v\u00e9nements s\u2019ils devaient se produire.<\/i><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<\/ol>\n<p>L\u2019<i>objectif fondamental de s\u00fbret\u00e9<\/i>&nbsp;s\u2019applique \u00e0 toutes les installations et activit\u00e9s et \u00e0 toutes les phases de la dur\u00e9e de vie d\u2019une installation ou d\u2019une source de rayonnements, notamment la conception, la planification, le choix du site, la fabrication, la construction, la mise en service, l\u2019exploitation, le d\u00e9classement et la fermeture.<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<p>Il s\u2019applique aussi au transport des mati\u00e8res radioactives et \u00e0 la gestion des d\u00e9chets radioactifs.<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<p>Enfin, il s&rsquo;applique \u00e0 toutes les situations de fonctionnement, depuis l&rsquo;exploitation normale jusqu&rsquo;\u00e0 la gestion des situations d&rsquo;urgence radiologiques.<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<p>Ainsi, les soci\u00e9t\u00e9s de conseil nucl\u00e9aires doivent prendre en compte la s\u00fbret\u00e9 pour tout conseil en \u00e9nergie nucl\u00e9aire.<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<h2>La D\u00e9fense en Profondeur<\/h2>\n<h3>D\u00e9finition<\/h3>\n<p>La&nbsp;<b>D\u00e9fense en Profondeur<\/b>&nbsp;est \u00e0 l&rsquo;origine un concept&nbsp;<i>militaire<\/i>.<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<p>Contre une menace donn\u00e9e, aucune d\u00e9fense unique n&rsquo;\u00e9tant infaillible, l&rsquo;id\u00e9e de la&nbsp;<i>D\u00e9fense en Profondeur<\/i>&nbsp;est de superposer plusieurs&nbsp;<b>niveaux<\/b>&nbsp;de d\u00e9fense&nbsp;<b>ind\u00e9pendants<\/b>.<br \/>\nChacun de ces niveaux permet d&rsquo;\u00e9viter autant que possible :<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<ul>\n<li>l&rsquo;atteinte du niveau de d\u00e9fense suivant ;<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li>les cons\u00e9quences de la d\u00e9faillance du niveau pr\u00e9c\u00e9dent.<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<\/ul>\n<p>L\u2019\u00ab International&nbsp;Nuclear&nbsp;Safety&nbsp;Group \u00bb (INSAG) de l\u2019AIEA a \u00e9tabli la&nbsp;<i>D\u00e9fense en Profondeur<\/i>&nbsp;pour la&nbsp;<i>S\u00fbret\u00e9 Nucl\u00e9aire<\/i>&nbsp;dans son rapport :&nbsp;<a href=\"http:\/\/www-pub.iaea.org\/books\/IAEABooks\/4714\/La-dfense-en-profondeur-en-sret-nuclaire-INSAG-10\">La D\u00e9fense en Profondeur en S\u00fbret\u00e9 Nucl\u00e9aire<\/a>&nbsp;(INSAG 10, 1997).<br \/>\nLa version anglaise de ce rapport est disponible en ligne :&nbsp;<a href=\"http:\/\/www-pub.iaea.org\/MTCD\/publications\/PDF\/Pub1013e_web.pdf\">\u00ab&nbsp;Defence&nbsp;in&nbsp;Depth&nbsp;in&nbsp;Nuclear&nbsp;Safety&nbsp;\u00bb<\/a>&nbsp;(INSAG 10, 1996).<br \/>\nLa&nbsp;<i>D\u00e9fense en Profondeur<\/i>&nbsp;en&nbsp;<i>S\u00fbret\u00e9 Nucl\u00e9aire<\/i>, ainsi structur\u00e9e en cinq niveaux, s&rsquo;applique \u00e0 toutes les \u00e9tapes de la conception et de l&rsquo;exploitation des installations nucl\u00e9aires.<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<p>Les formations propos\u00e9es par SureDyna comprennent une pr\u00e9sentation compl\u00e8te de la&nbsp;<i>D\u00e9fense en Profondeur<\/i>&nbsp;ainsi que de ses applications \u00e0 la conception et \u00e0 l&rsquo;exploitation des installations nucl\u00e9aires.<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<p>En attendant, il convient de retenir trois&nbsp;<b>niveaux fondamentaux<\/b>&nbsp;de&nbsp;<i>D\u00e9fense en Profondeur<\/i>&nbsp;:<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<ol>\n<li><b>Pr\u00e9vention<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li><b>Protection<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li><b>Limitation des cons\u00e9quences<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<\/ol>\n<h3>Exemple d&rsquo;application<\/h3>\n<p>L&rsquo;application la plus connue du concept de&nbsp;<i>D\u00e9fense en Profondeur<\/i>&nbsp;est celles des trois&nbsp;<i>barri\u00e8res<\/i>&nbsp;de confinement autour des mati\u00e8res radioactives du c\u0153ur d&rsquo;un r\u00e9acteur nucl\u00e9aire :<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<ol>\n<li>la gaine des \u00e9l\u00e9ments combustibles ;<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li>la cuve du r\u00e9acteur et le circuit de refroidissement primaire ;<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<li>le b\u00e2timent du r\u00e9acteur.<span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:357}\">&nbsp;<\/span><\/li>\n<\/ol>\n<p>Toutefois, bien que cet exemple de&nbsp;<i>D\u00e9fense en Profondeur<\/i>&nbsp;soit excellent et \u00e0 juste titre le plus cit\u00e9, il faut bien le consid\u00e9rer comme une simple&nbsp;<i>application<\/i>&nbsp;du concept de D\u00e9fense en Profondeur et non comme la&nbsp;<i>D\u00e9fense en Profondeur<\/i>&nbsp;elle-m\u00eame.<br \/>\nEn effet, ces&nbsp;<i>barri\u00e8res<\/i>&nbsp;ne correspondent pas aux&nbsp;<i>niveaux<\/i>&nbsp;de la D\u00e9fense en Profondeur et ne doivent pas \u00eatre confondues avec eux.<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<h3>Application g\u00e9n\u00e9rale<\/h3>\n<p>Suivant les diff\u00e9rents&nbsp;<i>niveaux<\/i>, la d\u00e9marche de&nbsp;<i>D\u00e9fense en Profondeur<\/i>&nbsp;d\u00e9finit des&nbsp;<b>cat\u00e9gories<\/b>&nbsp;de situations de fonctionnement normal ou anormal (incidents et accidents) et des dispositions de conception et d&rsquo;exploitation associ\u00e9es (\u00e9quipements redondants en cas de d\u00e9faillance, dispositifs de sauvegarde, proc\u00e9dures de conduites,&nbsp;incidentelles, accidentelles, etc.).<br \/>\nLes exigences \u00e0 l&rsquo;\u00e9gard d&rsquo;une situation donn\u00e9e sont d&rsquo;autant plus fortes&nbsp;que cette situation est susceptible de se produire plus fr\u00e9quemment, comme le sch\u00e9matise le diagramme dit \u00ab de Farmer \u00bb.<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-875 size-full\" src=\"https:\/\/www.test.suredyna.com\/wp-content\/uploads\/2017\/09\/diagramme-de-farmer.jpg\" alt=\"Diagramme de Farmer\" width=\"571\" height=\"482\" srcset=\"https:\/\/www.test.suredyna.com\/wp-content\/uploads\/2017\/09\/diagramme-de-farmer.jpg 571w, https:\/\/www.test.suredyna.com\/wp-content\/uploads\/2017\/09\/diagramme-de-farmer-300x253.jpg 300w, https:\/\/www.test.suredyna.com\/wp-content\/uploads\/2017\/09\/diagramme-de-farmer-450x380.jpg 450w\" sizes=\"(max-width: 571px) 100vw, 571px\" \/><\/p>\n<p>En tout \u00e9tat de cause, les niveaux de&nbsp;<i>D\u00e9fense en Profondeur<\/i>&nbsp;doivent \u00eatre&nbsp;<i>ind\u00e9pendants<\/i>&nbsp;de mani\u00e8re \u00e0 respecter le&nbsp;<b>Crit\u00e8re de D\u00e9faillance Unique<\/b>&nbsp;:<br \/>\n<i>Un seul \u00e9v\u00e9nement&nbsp;<\/i>(incident)<i>&nbsp;d&rsquo;une cat\u00e9gorie donn\u00e9e ne doit pas provoquer un \u00e9v\u00e9nement d&rsquo;une cat\u00e9gorie plus \u00e9lev\u00e9e sans que d&rsquo;autres \u00e9v\u00e9nements se produisent de mani\u00e8re ind\u00e9pendante<\/i>.<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<h3>Principes de S\u00fbret\u00e9 Nucl\u00e9aire<\/h3>\n<p>L&rsquo;<a href=\"http:\/\/www.iaea.org\/\">AIEA<\/a>&nbsp;a d\u00e9fini dix&nbsp;<a href=\"http:\/\/www-pub.iaea.org\/MTCD\/publications\/PDF\/Pub1273_web.pdf\">Principes Fondamentaux de S\u00fbret\u00e9<\/a>&nbsp;:&nbsp;<span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559738&quot;:100,&quot;335559739&quot;:100,&quot;335559740&quot;:240}\">&nbsp;<\/span><\/p>\n<ol>\n<li><b>La responsabilit\u00e9 premi\u00e8re en mati\u00e8re de s\u00fbret\u00e9 doit incomber \u00e0 la personne ou \u00e0 l\u2019organisme responsable des installations et activit\u00e9s entra\u00eenant des risques radiologiques<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:430}\">&nbsp;<\/span><\/li>\n<li><b>Un cadre juridique et gouvernemental efficace pour la s\u00fbret\u00e9, y compris un organisme de r\u00e9glementation ind\u00e9pendant, doit \u00eatre \u00e9tabli et maintenu<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:430}\">&nbsp;<\/span><\/li>\n<li><b>Une capacit\u00e9 de direction et de gestion efficace de la s\u00fbret\u00e9 doit \u00eatre mise en place et maintenue dans les organismes qui&nbsp;<\/b><b>s\u2019occupent des risques radiologiques et les installations et activit\u00e9s qui entra\u00eenent de tels risques<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:430}\">&nbsp;<\/span><\/li>\n<li><b>Les installations et activit\u00e9s qui entra\u00eenent des risques radiologiques doivent \u00eatre globalement utiles<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:430}\">&nbsp;<\/span><\/li>\n<li><b>La protection doit \u00eatre optimis\u00e9e de fa\u00e7on \u00e0 apporter le plus haut niveau de s\u00fbret\u00e9 que l\u2019on puisse raisonnablement atteindre<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:430}\">&nbsp;<\/span><\/li>\n<li><b>Les mesures de contr\u00f4le des risques radiologiques doivent prot\u00e9ger contre tout risque de dommage inacceptable<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:430}\">&nbsp;<\/span><\/li>\n<li><b>Les g\u00e9n\u00e9rations et l\u2019environnement actuels et futurs doivent \u00eatre prot\u00e9g\u00e9s contre les risques radiologiques<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:430}\">&nbsp;<\/span><\/li>\n<li><b>Tout doit \u00eatre concr\u00e8tement mis en&nbsp;<\/b><b>\u0153uvre<\/b><b>&nbsp;pour pr\u00e9venir les accidents nucl\u00e9aires ou radiologiques et en att\u00e9nuer les cons\u00e9quences<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:430}\">&nbsp;<\/span><\/li>\n<li><b>Des dispositions doivent \u00eatre prises pour la pr\u00e9paration et la conduite des interventions d\u2019urgence en cas d\u2019incidents nucl\u00e9aires ou radiologiques<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:430}\">&nbsp;<\/span><\/li>\n<li><b>Les actions protectrices visant \u00e0 r\u00e9duire les risques radiologiques existants ou non r\u00e9glement\u00e9s doivent \u00eatre justifi\u00e9es et optimis\u00e9es<\/b><span data-ccp-props=\"{&quot;134233118&quot;:true,&quot;201341983&quot;:0,&quot;335559685&quot;:714,&quot;335559738&quot;:120,&quot;335559739&quot;:100,&quot;335559740&quot;:240,&quot;335559991&quot;:430}\">&nbsp;<\/span><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>La s\u00fbret\u00e9 nucl\u00e9aire est l&rsquo;ensemble des dispositions techniques et des mesures d&rsquo;organisation prises en vue de pr\u00e9venir les accidents ou d&rsquo;en limiter les effets.\u00a0\u00a0<\/p>\n","protected":false},"author":3,"featured_media":1658,"comment_status":"open","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":""},"categories":[9],"tags":[],"class_list":["post-873","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-definitions"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Qu\u2019est-ce que la s\u00fbret\u00e9\u00a0nucl\u00e9aire ? - SureDyna<\/title>\n<meta name=\"description\" content=\"La s\u00fbret\u00e9 nucl\u00e9aire est l&#039;ensemble des dispositions techniques et des mesures d&#039;organisation prises en vue 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