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Atlanta, GA|Atlanta Marriott Marquis
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Latest News
Recent surveys confirm high levels of U.S. nuclear support
Surveys have consistently indicated that public support in the United States for the use of nuclear energy has been increasing in recent years. Four recent surveys continue to suggest that near-record-high numbers of Americans support nuclear energy. However, the survey results differ—sometimes widely—in the details of their findings.
Vito Renda, Loris Papa
Fusion Science and Technology | Volume 20 | Number 1 | August 1991 | Pages 40-47
Technical Paper | Divertor System | doi.org/10.13182/FST91-A29641
Articles are hosted by Taylor and Francis Online.
The performance and limits of a divertor plate for the Next European Torus (NET) are assessed. The design is a plasma-facing component that integrates the divertor plates and the inboard first wall in a monoblock panel. It is made of stainless steel poloidal U-tubes embedded in a copper matrix and protected by a carbon-fiber composite graphite armor. The thermal and thermomechanical behavior are analyzed in the high thermal flux zone taking into account the actual surface heating, which ranges from 5 to 10 MW/m2. A simplified preliminary analysis assesses the water flow and the component geometry in accordance with the system and material data foreseen for NET. It is shown that if the surface temperature of the armor is limited to 1273 K, the graphite thickness must be limited to 7.5 mm. Detailed thermal and mechanical finite element analyses, performed by the CASTEM 2000 code, show that the cooling tubes remain just below the creep regime temperature. The allowable limits prescribed by international standards are met, and the component's lifetime is 3000 cycles.