{"id":588,"date":"2006-05-05T17:09:00","date_gmt":"2006-05-05T15:09:00","guid":{"rendered":"http:\/\/qryergb.cluster131.hosting.ovh.net\/?p=588"},"modified":"2026-09-05T09:45:59","modified_gmt":"2026-09-05T07:45:59","slug":"grande-bretagne-1957-drame-a-windscale","status":"publish","type":"post","link":"https:\/\/www.observatoire-du-nucleaire.org\/?p=588","title":{"rendered":"Grande Bretagne&nbsp;: 1957, drame \u00e0&nbsp;Windscale"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Pendant 6&nbsp;jours, du 7&nbsp;au 12 octobre 1957, le centre nucl\u00e9aire de Windscale, situ\u00e9 sur la c\u00f4te nord-ouest de l\u2019Angleterre, est le lieu d\u2019un tr\u00e8s grave acci\u00addent nucl\u00e9aire qui sera clas\u00ads\u00e9 au niveau 5&nbsp;sur l\u2019\u00e9chelle (dite INES) inter\u00adna\u00adtio\u00adnale des \u00e9v\u00e9\u00adne\u00adments nucl\u00e9aires. Sachant que Tchernobyl cor\u00adres\u00adpond au niveau 7, il est clair que l\u2019accident de Windscale est un des plus graves de l\u2019Histoire. Un incen\u00addie, qui dure plu\u00adsieurs jours, endom\u00admage for\u00adte\u00adment un des r\u00e9ac\u00adteurs du site et d\u2019importants rejets radio\u00adac\u00adtifs ont lieu dans l\u2019environnement. Aucune mesure d\u2019\u00e9vacuation n\u2019a \u00e9t\u00e9 prise, alors que l\u2019accident \u00e9tait en cours et pou\u00advait tour\u00adner \u00e0&nbsp;une catas\u00adtrophe encore pire. Les rive\u00adrains ne seront aver\u00adtis qu\u2019apr\u00e8s coup. Des mil\u00adlions de litres de lait seront alors reje\u00adt\u00e9s en mer d\u2019Irlande, et la consom\u00adma\u00adtion de cer\u00adtains pro\u00adduits res\u00adte\u00adra inter\u00addite pen\u00addant plu\u00adsieurs semaines. Comme pour Tchernobyl trente ans plus tard, le nuage radio\u00adac\u00adtif ne reste bien s\u00fbr pas sur place, por\u00adt\u00e9 par les vents. Il par\u00adcourt l\u2019Angleterre, puis touche le conti\u00adnent sans que la popu\u00adla\u00adtion ne soit infor\u00adm\u00e9e. Des tra\u00advaux estiment de fa\u00e7ons variables le nombre de vic\u00adtimes&nbsp;: de quelques sala\u00adri\u00e9s irra\u00addi\u00e9s \u00e0&nbsp;plu\u00adsieurs mil\u00adliers de can\u00adcers induits. Difficile de savoir la v\u00e9ri\u00adt\u00e9\u2026 d\u2019autant qu\u2019elle reste cach\u00e9e&nbsp;: \u00ab&nbsp;L\u2019ancien pre\u00admier ministre conser\u00adva\u00adteur bri\u00adtan\u00adnique, Harold Macmillan, avait ordon\u00adn\u00e9, il y&nbsp;a trente ans, d\u2019\u00e9touffer un rap\u00adport d\u00e9taill\u00e9 sur les causes d\u2019un grave incen\u00addie qui s\u2019\u00e9tait pro\u00adduit \u00e0&nbsp;l\u2019int\u00e9rieur de l\u2019usine de retrai\u00adte\u00adment des d\u00e9chets nucl\u00e9aires de Windscale.&nbsp;\u00bb<span class=\"spip_note_ref\">&nbsp;[<a class=\"spip_note\" href=\"#nb1\" id=\"nh1\" rel=\"appendix\" title=\"Le Monde, 2 janvier 1988\">1<\/a>]<\/span><\/p>\n<p class=\"wp-block-paragraph\"><strong>Windscale devient Sellafield pour \u00ab&nbsp;effa\u00adcer&nbsp;\u00bb le&nbsp;pass\u00e9<\/strong><\/p>\n<p class=\"wp-block-paragraph\">Comme sou\u00advent dans le nucl\u00e9aire, la v\u00e9ri\u00adt\u00e9 est cach\u00e9e et le pas\u00ads\u00e9 effa\u00adc\u00e9&nbsp;: Windscale est d\u00e9bap\u00adti\u00ads\u00e9 et devient Sellafield. Ce site nucl\u00e9aire s\u2019est \u00e9tof\u00adf\u00e9 au fil des d\u00e9cen\u00adnies et com\u00adprend aujourd\u2019hui quatre cents b\u00e2ti\u00adments r\u00e9par\u00adtis sur 10&nbsp;km\u00b2. C\u2019est l\u2019\u00e9quivalent de La Hague en France. Outre le r\u00e9ac\u00adteur acci\u00adden\u00adt\u00e9 en 1957 et son fr\u00e8re jumeau, ain\u00adsi que quatre r\u00e9ac\u00adteurs eux aus\u00adsi d\u00e9fi\u00adni\u00adti\u00adve\u00adment arr\u00ea\u00adt\u00e9s, on trouve en par\u00adti\u00adcu\u00adlier trois grosses installations&nbsp;:<\/p>\n<ul class=\"wp-block-list\"><li> <strong>Magnox<\/strong>, une pre\u00admi\u00e8re usine de retrai\u00adte\u00adment ouverte en 1964. Elle est res\u00adpon\u00adsable de nom\u00adbreux rejets radio\u00adac\u00adtifs dans l\u2019air et dans la mer. Elle devrait fer\u00admer en&nbsp;2010.<\/li>\n<\/ul>\n<ul class=\"wp-block-list\"><li> <strong>Thorp <\/strong> (Thermal oxide repro\u00adces\u00adsing Plant), seconde usine de retrai\u00adte\u00adment des com\u00adbus\u00adtibles et d\u2019entreposage des d\u00e9chets hau\u00adte\u00adment radio\u00adac\u00adtifs, ouverte en 1985. Elle est \u00e9ga\u00adle\u00adment res\u00adpon\u00adsable de tr\u00e8s impor\u00adtants rejets occa\u00adsion\u00adn\u00e9s durant le pro\u00adces\u00adsus de s\u00e9pa\u00adra\u00adtion des dif\u00adf\u00e9\u00adrents com\u00adpo\u00adsants des d\u00e9chets nucl\u00e9aires. Gravement acci\u00adden\u00adt\u00e9e en 2005 (voir plus&nbsp;loin)<\/li>\n<\/ul>\n<ul class=\"wp-block-list\"><li> <strong>Sellafield Mox Plan<\/strong>t (SMP) est ouverte en 1997 pour pro\u00adduire du com\u00adbus\u00adtible \u00ab&nbsp;mox&nbsp;\u00bb (qui contient du plu\u00adto\u00adnium). En 1999, une pre\u00admi\u00e8re livrai\u00adson de cinq tonnes de Mox est refu\u00ads\u00e9e par le Japon et ren\u00advoy\u00e9e, apr\u00e8s la d\u00e9cou\u00adverte de docu\u00adments fal\u00adsi\u00adfi\u00e9s par BNFL, l\u2019exploitant anglais. Les usines de Mox sont r\u00e9pu\u00adt\u00e9es pour reje\u00adter dans l\u2019environnement de grandes quan\u00adti\u00adt\u00e9s de pro\u00adduits radioactifs.<\/li>\n<\/ul>\n<p class=\"wp-block-paragraph\"><strong>Col\u00e8re irlan\u00addaise<\/strong><\/p>\n<p class=\"wp-block-paragraph\">Depuis long\u00adtemps, les rive\u00adrains s\u2019inqui\u00e8tent des cons\u00e9\u00adquences sur leur san\u00adt\u00e9 de la pr\u00e9\u00adsence du site nucl\u00e9aire de Windscale\/Sellafield. En 1983, un docu\u00admen\u00adtaire de la t\u00e9l\u00e9\u00advi\u00adsion bri\u00adtan\u00adnique r\u00e9v\u00e9\u00adlait que dans le vil\u00adlage de Seascale, situ\u00e9 non loin de Sellafield, le taux d\u2019enfants atteints de can\u00adcer \u00e9tait dix fois plus \u00e9le\u00adv\u00e9 que la moyenne nationale.<\/p>\n<p class=\"wp-block-paragraph\">Il se trouve que les Irlandais sont eux aus\u00adsi for\u00adte\u00adment mena\u00adc\u00e9s&nbsp;: moins de 200&nbsp;km s\u00e9parent la cen\u00adtrale et Dublin. Par ailleurs, de m\u00eame que le nuage de Tchernobyl n\u2019a pas \u00e9t\u00e9 arr\u00ea\u00adt\u00e9 par les fron\u00adti\u00e8res, la radio\u00adac\u00adti\u00advi\u00adt\u00e9 ne reste pas dans les eaux ter\u00adri\u00adto\u00adriales bri\u00adtan\u00adniques. Au contraire&nbsp;: les cou\u00adrant poussent les rejets vers l\u2019Irlande. L\u2019ouverture de l\u2019usine SMP n\u2019a fait qu\u2019attiser la col\u00e8re irlan\u00addaise. Le 24 novembre 2001, le prin\u00adci\u00adpal par\u00adti, le Fianna Fail, ach\u00e8te une pleine page de publi\u00adci\u00adt\u00e9 dans le Times de Londres, titrant \u00ab&nbsp;Fermez Sellafield&nbsp;\u00bb, demande sign\u00e9e par 110 d\u00e9pu\u00adt\u00e9s \u00ab&nbsp;Sellafield impose un risque inac\u00adcep\u00adtable et non n\u00e9ces\u00adsaire&nbsp;\u00bb \u00e0&nbsp;l\u2019environnement irlan\u00addais. Le pre\u00admier ministre irlan\u00addais a&nbsp;clai\u00adre\u00adment pris posi\u00adtion&nbsp;: \u00ab&nbsp;Nous sou\u00adhai\u00adtons indi\u00adquer clai\u00adre\u00adment et direc\u00adte\u00adment au peuple bri\u00adtan\u00adnique com\u00adbien nous sommes pr\u00e9\u00adoc\u00adcu\u00adp\u00e9s par les dan\u00adgers aux\u00adquels sont expo\u00ads\u00e9es les popu\u00adla\u00adtions de ces \u00eeles par les acti\u00advi\u00adt\u00e9s \u00e0&nbsp;Sellafield et, en par\u00adti\u00adcu\u00adlier, par les nou\u00advelles pro\u00adpo\u00adsi\u00adtions concer\u00adnant le&nbsp;Mox&nbsp;\u00bb.<\/p>\n<p class=\"wp-block-paragraph\">Tout comme le site fran\u00ad\u00e7ais de La Hague, Sellafield est une des ins\u00adtal\u00adla\u00adtions les plus pol\u00adluantes et les plus dan\u00adge\u00adreuses du&nbsp;monde.<\/p>\n<p class=\"wp-block-paragraph\"><strong>Accident de l\u2019usine Thorp en&nbsp;2005<\/strong><\/p>\n<p class=\"wp-block-paragraph\">Le 20 avril 2005, une fuite est d\u00e9tec\u00adt\u00e9e \u00e0&nbsp;l\u2019usine Thorp de Sellafield. Ce n\u2019est pas une mince affaire&nbsp;: 83 000 litres de com\u00adbus\u00adtible liqu\u00e9\u00adfi\u00e9 for\u00adte\u00adment radio\u00adac\u00adtif, conte\u00adnant pas moins de 19 tonnes d\u2019uranium et 200&nbsp;kg de plu\u00adto\u00adnium, se sont \u00e9cou\u00adl\u00e9s. Incroyable&nbsp;: l\u2019enqu\u00eate a&nbsp;mon\u00adtr\u00e9 que cela fai\u00adsait\u2026 neuf mois que la fuite avait com\u00admen\u00adc\u00e9. Et plus de trois mois que la tuyau\u00adte\u00adrie d\u00e9faillante \u00e9tait tota\u00adle\u00adment rom\u00adpue&nbsp;! Heureusement, le liquide est res\u00adt\u00e9 conte\u00adnu dans l\u2019installation. Mais il y&nbsp;avait un risque r\u00e9el d\u2019emballement nucl\u00e9aire par r\u00e9ac\u00adtion de criticit\u00e9.<\/p>\n<p class=\"wp-block-paragraph\">Les experts fran\u00ad\u00e7ais de l\u2019IRSN, qui ont men\u00e9 \u00e0&nbsp;Thorp une ins\u00adpec\u00adtion d\u2019\u00e9valuation, expliquent&nbsp;: \u00ab&nbsp;la d\u00e9tec\u00adtion tar\u00addive de l\u2019incident est li\u00e9e \u00e0&nbsp;une s\u00e9rie de d\u00e9faillances humaines et orga\u00adni\u00adsa\u00adtion\u00adnelles&nbsp;: erreur lors d\u2019une op\u00e9\u00adra\u00adtion de contr\u00f4le du bon fonc\u00adtion\u00adne\u00adment du sys\u00adt\u00e8me de d\u00e9tec\u00adtion de fuite implan\u00adt\u00e9 dans un des pui\u00adsards de la cel\u00adlule qui a&nbsp;abou\u00adti \u00e0&nbsp;un dys\u00adfonc\u00adtion\u00adne\u00adment par\u00adtiel de ce sys\u00adt\u00e8me, absence de prise en compte de nom\u00adbreux signaux pr\u00e9\u00adcur\u00adseurs pou\u00advant lais\u00adser sup\u00adpo\u00adser l\u2019existence d\u2019une fuite (alarmes de niveau fugaces dans un des pui\u00adsards, pr\u00e9\u00adsence d\u2019uranium dans les \u00e9chan\u00adtillons pr\u00e9\u00adle\u00adv\u00e9s, aug\u00admen\u00adta\u00adtion de tem\u00adp\u00e9\u00adra\u00adture dans le pui\u00adsard de la cel\u00adlule, \u00e9carts de bilan mati\u00e8res anor\u00admaux)&nbsp;; il semble qu\u2019un \u00ab&nbsp;exc\u00e8s de confiance&nbsp;\u00bb dans la concep\u00adtion de l\u2019usine et qu\u2019une culture de s\u00fbre\u00adt\u00e9 insuf\u00adfi\u00adsante soient \u00e0&nbsp;l\u2019origine de ces d\u00e9faillances.&nbsp;\u00bb<span class=\"spip_note_ref\">&nbsp;[<a class=\"spip_note\" href=\"#nb2\" id=\"nh2\" rel=\"appendix\">2<\/a>]<\/span><\/p>\n<p class=\"wp-block-paragraph\">Pas tr\u00e8s ras\u00adsu\u00adrant. Et dire que l\u2019on nous vante si sou\u00advent le nucl\u00e9aire occi\u00adden\u00adtal, tel\u00adle\u00adment plus \u00ab&nbsp;s\u00fbr&nbsp;\u00bb que le nucl\u00e9aire sovi\u00e9\u00adtique res\u00adpon\u00adsable de Tchernobyl\u2026<\/p>\n<hr>\n<p class=\"wp-block-paragraph\"><span class=\"spip_note_ref\">[<a class=\"spip_note\" href=\"#nh1\" rev=\"appendix\" title=\"Notes 1\">1<\/a>]&nbsp;<\/span>Le Monde, 2&nbsp;jan\u00advier&nbsp;1988<\/p>\n<p class=\"wp-block-paragraph\"><span class=\"spip_note_ref\">[<a class=\"spip_note\" href=\"#nh2\" rev=\"appendix\" title=\"Notes 2\">2<\/a>]&nbsp;<\/span><a class=\"spip_url spip_out auto\" href=\"https:\/\/www.irsn.org\/vf\/05_inf\/05_inf_1dossiers\/05_inf_46_thorp\/05_inf_46_thorp.shtm\" rel=\"nofollow external\">www.irsn.org\/vf\/05_inf\/05_inf_1dossiers\/05_inf_46_thorp\/05_inf_46_thorp.shtm<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pendant 6&nbsp;jours, du 7&nbsp;au 12 octobre 1957, le centre nucl\u00e9aire de Windscale, situ\u00e9 sur la c\u00f4te nord-ouest de l\u2019Angleterre, est le lieu d\u2019un tr\u00e8s grave acci\u00addent nucl\u00e9aire qui sera clas\u00ads\u00e9 au niveau 5&nbsp;sur l\u2019\u00e9chelle (dite INES) inter\u00adna\u00adtio\u00adnale des \u00e9v\u00e9\u00adne\u00adments nucl\u00e9aires. Sachant que Tchernobyl cor\u00adres\u00adpond au niveau 7, il est clair que l\u2019accident de Windscale est&nbsp;[\u2026]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wp_typography_post_enhancements_disabled":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-588","post","type-post","status-publish","format-standard","hentry","category-communiques"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Grande Bretagne\u00a0: 1957, drame \u00e0 Windscale - Observatoire du nucl\u00e9aire<\/title>\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.observatoire-du-nucleaire.org\/?p=588\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Grande Bretagne\u00a0: 1957, drame \u00e0 Windscale - Observatoire du nucl\u00e9aire\" \/>\n<meta property=\"og:description\" content=\"Pendant 6&nbsp;jours, du 7&nbsp;au 12 octobre 1957, le centre nucl\u00e9aire de Windscale, situ\u00e9 sur la c\u00f4te nord-ouest de l\u2019Angleterre, est le lieu d\u2019un tr\u00e8s grave acci\u00addent nucl\u00e9aire qui sera clas\u00ads\u00e9 au niveau 5&nbsp;sur l\u2019\u00e9chelle (dite INES) inter\u00adna\u00adtio\u00adnale des \u00e9v\u00e9\u00adne\u00adments nucl\u00e9aires. Sachant que Tchernobyl cor\u00adres\u00adpond au niveau 7, il est clair que l\u2019accident de Windscale est [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.observatoire-du-nucleaire.org\/?p=588\" \/>\n<meta property=\"og:site_name\" content=\"Observatoire du nucl\u00e9aire\" \/>\n<meta property=\"article:published_time\" content=\"2006-05-05T15:09:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-05T07:45:59+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/?p=588#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/?p=588\"},\"author\":{\"name\":\"\",\"@id\":\"\"},\"headline\":\"Grande Bretagne&nbsp;: 1957, drame \u00e0&nbsp;Windscale\",\"datePublished\":\"2006-05-05T15:09:00+00:00\",\"dateModified\":\"2026-09-05T07:45:59+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/?p=588\"},\"wordCount\":1075,\"publisher\":{\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/#organization\"},\"articleSection\":[\"Communiqu\u00e9s\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/?p=588\",\"url\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/?p=588\",\"name\":\"Grande Bretagne\u00a0: 1957, drame \u00e0 Windscale - Observatoire du nucl\u00e9aire\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/#website\"},\"datePublished\":\"2006-05-05T15:09:00+00:00\",\"dateModified\":\"2026-09-05T07:45:59+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/?p=588#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/?p=588\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/?p=588#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Grande Bretagne&nbsp;: 1957, drame \u00e0&nbsp;Windscale\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/#website\",\"url\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/\",\"name\":\"Observatoire du nucl\u00e9aire\",\"description\":\"Organisme ind\u00e9pendant de surveillance de l\u2019industrie nucl\u00e9aire\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/#organization\",\"name\":\"Observatoire du nucl\u00e9aire\",\"url\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"http:\\\/\\\/qryergb.cluster131.hosting.ovh.net\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/logo-ODN.png\",\"contentUrl\":\"http:\\\/\\\/qryergb.cluster131.hosting.ovh.net\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/logo-ODN.png\",\"width\":160,\"height\":160,\"caption\":\"Observatoire du nucl\u00e9aire\"},\"image\":{\"@id\":\"https:\\\/\\\/www.observatoire-du-nucleaire.org\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Grande Bretagne\u00a0: 1957, drame \u00e0 Windscale - Observatoire du nucl\u00e9aire","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:\/\/www.observatoire-du-nucleaire.org\/?p=588","og_locale":"fr_FR","og_type":"article","og_title":"Grande Bretagne\u00a0: 1957, drame \u00e0 Windscale - Observatoire du nucl\u00e9aire","og_description":"Pendant 6&nbsp;jours, du 7&nbsp;au 12 octobre 1957, le centre nucl\u00e9aire de Windscale, situ\u00e9 sur la c\u00f4te nord-ouest de l\u2019Angleterre, est le lieu d\u2019un tr\u00e8s grave acci\u00addent nucl\u00e9aire qui sera clas\u00ads\u00e9 au niveau 5&nbsp;sur l\u2019\u00e9chelle (dite INES) inter\u00adna\u00adtio\u00adnale des \u00e9v\u00e9\u00adne\u00adments nucl\u00e9aires. 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