{"id":30236,"date":"2018-05-31T11:54:46","date_gmt":"2018-05-31T11:54:46","guid":{"rendered":"https:\/\/npoeustg.wpenginepowered.com\/latest-news\/radvision3d-etude-de-cas-lasalle\/"},"modified":"2018-05-31T11:54:46","modified_gmt":"2018-05-31T11:54:46","slug":"radvision3d-etude-de-cas-lasalle","status":"publish","type":"post","link":"https:\/\/www.npo.eu.com\/fr\/latest-news\/radvision3d-etude-de-cas-lasalle\/","title":{"rendered":"RadVision3D – \u00c9tude de cas LaSalle"},"content":{"rendered":"

Dans le cadre d’un travail, la centrale de LaSalle a \u00e9conomis\u00e9 12 Rem (120 mSv)<\/strong> gr\u00e2ce \u00e0 l’utilisation de la cartographie des sources de rayonnement gamma en 3D et de l’analyse d’intervention, RadVision3D<\/sup>.<\/p>\n

La vanne de nettoyage de l’eau du r\u00e9acteur est une vanne Anchor Darling qui a d\u00fb \u00eatre perc\u00e9e et dont les pi\u00e8ces internes ont \u00e9t\u00e9 remplac\u00e9es au cours d’un arr\u00eat de ravitaillement. Il est situ\u00e9 dans une zone verrouill\u00e9e \u00e0 fort rayonnement. LaSalle avait besoin d’un syst\u00e8me de blindage optimis\u00e9 qui soit non seulement rapide et facile \u00e0 installer, mais qui permette \u00e9galement de r\u00e9duire consid\u00e9rablement la dose. La plupart des processus de travail devaient se d\u00e9rouler dans la zone entour\u00e9e en rouge ci-dessous dans l’\u00e9tude de dose avant blindage.<\/p>\n

\"\"<\/a>
Etude de dose avant blindage fournie par LaSalle<\/figcaption><\/figure>\n

L’ONP, en collaboration avec Transco, a effectu\u00e9 un balayage RadVision3D<\/sup> dans la pi\u00e8ce \u00e0 quatre endroits. Le nuage de points 3D du balayage laser, l’image de la cam\u00e9ra panoramique et la spectroscopie CZT ont \u00e9t\u00e9 combin\u00e9s pour cr\u00e9er un environnement virtuel qui quantifie et localise la contribution de la dose provenant de toutes les <\/em>sources. Des emplacements sp\u00e9cifiques autour de la vanne ont \u00e9t\u00e9 analys\u00e9s afin de d\u00e9terminer l’impact de diff\u00e9rentes configurations de blindage. Plusieurs de ces configurations ont \u00e9t\u00e9 simul\u00e9es afin de d\u00e9terminer leur efficacit\u00e9.<\/p>\n

 <\/p>\n

\"\"<\/a><\/p>\n

\"\"<\/a>
Pr\u00e9cision de la collecte des donn\u00e9es analys\u00e9e aux points A et B<\/figcaption><\/figure>\n\n\n\n\n\n\n
Lieu de l’enqu\u00eate<\/td>\nDonn\u00e9es d’enqu\u00eate<\/td>\nDonn\u00e9es RadVision3D<\/sup> <\/td>\n<\/tr>\n
A<\/td>\n1 300 mRem\/h (13 000 \u03bcSv\/h)<\/td>\n1 304 mRem\/h (13 040 \u03bcSv\/h)<\/td>\n<\/tr>\n
B<\/td>\n600 mRem\/h (6 000 \u03bcSv\/h)<\/td>\n635 mRem\/hr (6 350 \u03bcSv\/hr)<\/td>\n<\/tr>\n
Les donn\u00e9es RadVision3D<\/sup> sont la moyenne de 5 points de pr\u00e9l\u00e8vement dans la zone approximative de l’\u00e9tude de dose.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

\"\"<\/a><\/p>\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\nPas de bouclier<\/td>\nBlindage des points chauds<\/td>\n<\/tr>\n
<\/td>\n<\/td>\nmRem\/hr (\u03bcSv\/hr)<\/td>\nmRem\/hr (\u03bcSv\/hr)<\/td>\nR\u00e9duction<\/td>\n<\/tr>\n
Localisation<\/td>\n1<\/td>\n769 (7,690)<\/td>\n756 (7,560)<\/td>\n2%<\/td>\n<\/tr>\n
2<\/td>\n918 (9,180)<\/td>\n901 (9,010)<\/td>\n2%<\/td>\n<\/tr>\n
3<\/td>\n1283 (12,830)<\/td>\n1242 (12,420)<\/td>\n3%<\/td>\n<\/tr>\n
4<\/td>\n290 (2,900)<\/td>\n286 (2,860)<\/td>\n1%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Tout d’abord, l’\u00e9tat de la pi\u00e8ce sans aucun blindage a \u00e9t\u00e9 compar\u00e9 \u00e0 ce que seraient les d\u00e9bits de dose si les points chauds \u00e9taient blind\u00e9s. Cela correspondait au plan de blindage avant l’analyse RadVision3D<\/sup>. Bien que la pens\u00e9e conventionnelle indique que c’est la solution la plus efficace, en raison de la nature complexe et des d\u00e9bits de dose \u00e9lev\u00e9s dans la pi\u00e8ce, le blindage des seuls points chauds a eu tr\u00e8s peu d’impact sur les d\u00e9bits de dose.<\/p>\n

 <\/p>\n

\"\"<\/a><\/p>\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\nPoints chauds<\/td>\nConfiguration 1<\/td>\n<\/tr>\n
<\/td>\n<\/td>\nmRem\/hr (\u03bcSv\/hr)<\/td>\nmRem\/hr (\u03bcSv\/hr)<\/td>\nR\u00e9duction<\/td>\n<\/tr>\n
Localisation<\/td>\n1<\/td>\n756 (7,560)<\/td>\n477 (4,770)<\/td>\n38%<\/td>\n<\/tr>\n
2<\/td>\n901 (9,010)<\/td>\n378 (3,780)<\/td>\n59%<\/td>\n<\/tr>\n
3<\/td>\n1242 (12,42)<\/td>\n534 (5,340)<\/td>\n58%<\/td>\n<\/tr>\n
4<\/td>\n286 (2,860)<\/td>\n192 (1,920)<\/td>\n34%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Le blindage par point chaud s’\u00e9tant av\u00e9r\u00e9 inefficace, diff\u00e9rentes configurations de supports de couverture en laine de plomb NPO ont \u00e9t\u00e9 essay\u00e9es. Chaque rack mesure environ 0,91 m de large et poss\u00e8de un blindage \u00e9quivalent \u00e0 25 mm de plomb.<\/p>\n

 <\/p>\n

\"\"<\/a><\/p>\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\nPoints chauds<\/td>\nConfiguration 2<\/td>\n<\/tr>\n
<\/td>\n<\/td>\nmRem\/hr (\u03bcSv\/hr)<\/td>\nmRem\/hr (\u03bcSv\/hr)<\/td>\nR\u00e9duction<\/td>\n<\/tr>\n
Localisation<\/td>\n1<\/td>\n756 (7,560)<\/td>\n362 (3,620)<\/td>\n53%<\/td>\n<\/tr>\n
2<\/td>\n901 (9,010)<\/td>\n502 (5,020)<\/td>\n45%<\/td>\n<\/tr>\n
3<\/td>\n1242 (12,420)<\/td>\n740 (7,400)<\/td>\n42%<\/td>\n<\/tr>\n
4<\/td>\n286 (2,860)<\/td>\n155 (1,550)<\/td>\n47%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Sans avoir \u00e0 se rendre dans la salle pour valider une configuration de blindage en l’installant r\u00e9ellement, LaSalle a pu voir les d\u00e9bits de dose de nombreuses options diff\u00e9rentes.<\/p>\n

 <\/p>\n

\"\"<\/a><\/p>\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\nPoints chauds<\/td>\nConfiguration 3<\/td>\n<\/tr>\n
<\/td>\n<\/td>\nmRem\/hr (\u03bcSv\/hr)<\/td>\nmRem\/hr (\u03bcSv\/hr)<\/td>\nR\u00e9duction<\/td>\n<\/tr>\n
Localisation<\/td>\n1<\/td>\n756 (7,560)<\/td>\n522 (5,220)<\/td>\n32%<\/td>\n<\/tr>\n
2<\/td>\n901 (9,010)<\/td>\n531 (5,310)<\/td>\n42%<\/td>\n<\/tr>\n
3<\/td>\n1242 (12,420)<\/td>\n740 (7,400)<\/td>\n42%<\/td>\n<\/tr>\n
4<\/td>\n286 (2,860)<\/td>\n89 (890)<\/td>\n69%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

\"\"<\/a><\/p>\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\nPoints chauds<\/td>\nBlindage optimis\u00e9<\/td>\n<\/tr>\n
<\/td>\n<\/td>\nmRem\/hr (\u03bcSv\/hr)<\/td>\nmRem\/hr (\u03bcSv\/hr)<\/td>\nR\u00e9duction<\/td>\n<\/tr>\n
Localisation<\/td>\n1<\/td>\n756 (7,560)<\/td>\n422 (4,220)<\/td>\n45%<\/td>\n<\/tr>\n
2<\/td>\n901 (9,010)<\/td>\n824 (8,240)<\/td>\n10%<\/td>\n<\/tr>\n
3<\/td>\n1242 (12,420)<\/td>\n414 (4,140)<\/td>\n68%<\/td>\n<\/tr>\n
4<\/td>\n286 (2,860)<\/td>\n169 (1,690)<\/td>\n42%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Il s’agit de la configuration de blindage optimale – trois supports de couverture en plomb fermant la vanne du reste de la pi\u00e8ce. Le nombre de racks est r\u00e9duit au minimum pour diminuer le temps d’installation et la complexit\u00e9, et leur positionnement sp\u00e9cifique r\u00e9duit consid\u00e9rablement les d\u00e9bits de dose dans les zones de travail cruciales. Vous trouverez ci-dessous les r\u00e9sultats de l’\u00e9tude de LaSalle apr\u00e8s le blindage, compar\u00e9s aux r\u00e9sultats pr\u00e9vus par RadVision3D<\/sup>.<\/p>\n

 <\/p>\n

\"\"<\/a><\/p>\n

\"\"<\/a>
Pr\u00e9cision de la collecte des donn\u00e9es analys\u00e9e aux points A et B – Post-bouclier<\/figcaption><\/figure>\n\n\n\n\n\n\n
Lieu de l’enqu\u00eate<\/td>\nDonn\u00e9es d’enqu\u00eate<\/td>\nDonn\u00e9es RadVision3D<\/sup> <\/td>\n<\/tr>\n
A<\/td>\n500 mRem\/h (5 000 \u03bcSv\/h)<\/td>\n483 mRem\/hr (4 830 \u03bcSv\/hr)<\/td>\n<\/tr>\n
B<\/td>\n290 mRem\/h (2 900 \u03bcSv\/h)<\/td>\n270 mRem\/h (2 700 \u03bcSv\/h)<\/td>\n<\/tr>\n
Les donn\u00e9es RadVision3D<\/sup> sont la moyenne de 5 points de pr\u00e9l\u00e8vement dans la zone approximative des donn\u00e9es du relev\u00e9 de dose.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Les r\u00e9sultats de RadVision3D se comparent tr\u00e8s bien aux conditions r\u00e9elles rencontr\u00e9es par LaSalle. Au total, les scanners ont pris 30 mRem (300 \u03bcSv\/h), le blindage a \u00e9t\u00e9 install\u00e9 en 20 minutes et a pris 163 mRem (1 630 \u03bcSv\/h). Avec une r\u00e9duction de dose globale d’environ 50 %, LaSalle a pu \u00e9conomiser 12 Rem (120 mSv)<\/strong> sur l’ensemble des travaux effectu\u00e9s sur cette vanne.<\/p>\n","protected":false},"excerpt":{"rendered":"

Dans le cadre d’un travail, la centrale de LaSalle a \u00e9conomis\u00e9 12 Rem (120 mSv) gr\u00e2ce \u00e0 l’utilisation de la cartographie des sources de rayonnement gamma en 3D et de l’analyse d’intervention, RadVision3D. La vanne de nettoyage de l’eau du r\u00e9acteur est une vanne Anchor Darling qui a d\u00fb \u00eatre perc\u00e9e et dont les pi\u00e8ces […]<\/p>\n","protected":false},"author":6,"featured_media":29963,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[192,247],"tags":[168,251,249,182,187,175,253,163,255,261,185,257,259,206,164,165],"class_list":["post-30236","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-etudes-de-cas","category-radvision3d-fr","tag-blindage","tag-camera-gamma","tag-couvertures-de-plomb","tag-domaine-general","tag-enquete","tag-gamma-fr","tag-h3d-fr","tag-lenergie-nucleaire","tag-lasalle-fr","tag-planification-du-travail","tag-plomb","tag-radvision-fr","tag-radvision3d-fr","tag-scan-laser","tag-t-flex-fr","tag-temporaire"],"acf":[],"yoast_head":"\nRadVision3D - \u00c9tude de cas LaSalle - 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