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DOE-EM issues draft RFP for Hanford lab work, awards WIPP monitoring grant
The Department of Energy’s Office of Environmental Management issued a draft request for proposals on June 25 for the Hanford Site’s 222-S Laboratory contract. The 222-S Laboratory is the primary on-site laboratory for analysis of highly radioactive samples in support of all projects at the DOE’s Hanford Site in Washington state.
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.