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Commentaires sur : La fusion nucléaire ou le mariage réussi de l’énergie et de l’environnement https://energethique.be/2010/la-fusion-nucleaire-ou-le-mariage-reussi-de-lenergie-et-de-lenvironnement/ Pour une utilisation plus rationnelle de l'énergie Fri, 25 Feb 2011 21:00:47 +0000 hourly 1 https://wordpress.org/?v=5.8.13 Par : JDD https://energethique.be/2010/la-fusion-nucleaire-ou-le-mariage-reussi-de-lenergie-et-de-lenvironnement/comment-page-1/#comment-4499 Fri, 25 Feb 2011 21:00:47 +0000 https://energethique.be/?p=1108#comment-4499 http://www-fusion-magnetique.cea.fr/

]]> Par : JDD https://energethique.be/2010/la-fusion-nucleaire-ou-le-mariage-reussi-de-lenergie-et-de-lenvironnement/comment-page-1/#comment-3444 Sun, 26 Sep 2010 17:33:15 +0000 https://energethique.be/?p=1108#comment-3444 De nombreux physiciens s’interrogent sur la pertinence du projet de fusion contrôlé – projet ITER- mené à Cadarache par des équipes internationales de chercheurs. Certains dont le Prix Nobel Georges Charpak demandent même l’arrêt du projet.

]]> Par : JDD https://energethique.be/2010/la-fusion-nucleaire-ou-le-mariage-reussi-de-lenergie-et-de-lenvironnement/comment-page-1/#comment-3443 Sun, 26 Sep 2010 17:25:05 +0000 https://energethique.be/?p=1108#comment-3443 L’impasse financière du projet ITER:
http://www.sciencesetavenir.fr/actualite/fondamental/20100921.OBS0151/desaccord-europeen-sur-le-financement-d-iter.html

A l’origine, le projet ITER devait coûter 5 milliards d’euros.
Aujourd’hui les estimations actuelles avancent le chiffre de 15 milliards d’euros.

1er problème:
Personne ne veut payer le financement pour 2012-2013.
2ème problème:
On ne connaît toujours pas de matériau capable de résister sur le long terme au bombardement de neutrons de haute énergie (14 MeV) qui seront produits par la fusion et qui, n’étant pas chargés, s’échapperont du piège magnétique.
3ème problème:
Le tritium que la réaction consommera n’existe pas à l’état naturel et ne peut être produit que par un autre réacteur nucléaire. Aussi, pour éviter autant que possible d’avoir à transporter cette matière radioactive et sensible (la bombe H repose sur une réaction explosive d’atomes de tritium), ITER devra générer lui-même une partie de son combustible.

Premières fusions pour 2020?

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