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Latest News
IAEA: Chernobyl drone strike latest threat to nuclear safety in Ukraine
Social media this past weekend streamed with reactionary posts following a drone strike last Friday at the site of the destroyed reactor from the 1986 Chernobyl accident. The drone—armed with a warhead—ripped a hole in the New Safe Confinement (NSC), a large structure built to prevent any radioactive release from the damaged reactor unit 4 and to protect it from any external hazard. The drone strike caused a fire that was still smoldering in places as of Monday morning, and left a hole larger than 500 square feet. Efforts continue to mitigate the consequences of the fire and extinguish isolated smouldering areas of the NSC's insulation material.
Due to damage to the external and internal cladding of the NSC's arch and main crane system equipment, the safety boundaries and operational conditions of the NSC complex have been compromised, according to the Chernobyl nuclear power plant Facebook page.
Frédéric Ben Saïd, Benoît Reneaume, Christophe Dauteuil, Olivier Breton, Ronan Botrel, Cédric Chicanne, Isabelle Geoffray, Rémy Collier, Olivier Legaie
Fusion Science and Technology | Volume 59 | Number 1 | January 2011 | Pages 234-239
Technical Paper | Nineteenth Target Fabrication Meeting | doi.org/10.13182/FST11-A11530
Articles are hosted by Taylor and Francis Online.
The High Power laser Energy Research facility (HiPER) is a European project dedicated to demonstrating the feasibility of producing energy by laser-driven inertial confinement fusion. A first design of the fast ignition cryogenic target has been established. It is composed of a thin-walled microshell with an inserted gold cone and filled with deuterium-tritium (DT) fuel by means of a capillary (conically guided capsule). After assembly, targets must be tight at cryogenic temperatures (16 to 19.6 K).In order to evaluate the manufacturing feasibility of a single-shot target prototype, a program has been adapted from the Laser Mégajoule (LMJ) cryogenic target fabrication know-how. Target component study for HiPER concerns a hollow gold cone (25-deg half-angle and [approximately]25-m thickness), a thin polymeric microshell (2-mm diameter and 3- to 10-m thickness), and a silica capillary (30-m outer diameter).First gas-tight targets at 77 K have been produced (helium gas leak rate [approximately]1.4 × 10-11 Pam3/s). Major efforts have been focused on thin-walled microshells, robust gold cone fabrication, and target assembly (minimizing of the glue quantity as well as helium gas leak tests) and will be discussed in this paper.