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Latest News
DOE announces NEPA exclusion for advanced reactors
The Department of Energy has announced that it is establishing a categorical exclusion for the application of National Environmental Policy Act (NEPA) procedures to the authorization, siting, construction, operation, reauthorization, and decommissioning of advanced nuclear reactors.
According to the DOE, this significant change, which goes into effect today, “is based on the experience of DOE and other federal agencies, current technologies, regulatory requirements, and accepted industry practice.”
R.P. Keatch, B. Lawrenson, L.M. Huang, A. Meramveliotaki
Fusion Science and Technology | Volume 38 | Number 1 | July 2000 | Pages 119-122
Technical Paper | Thirteenth Target Fabrication Specialists’ Meeting | doi.org/10.13182/FST00-A36127
Articles are hosted by Taylor and Francis Online.
The techniques of photolithography and vacuum coating have been investigated, primarily as a means of producing three-dimensional structures. Using ultra-smooth glass capillary tubes as a substrate, and a rotational drive system, multiple free-standing cylinders can be fabricated on the surface. These are produced by a combination of metallisation and photolithography to accurately define the desired structure with precise edge definition. Owing to the rotary motion of the photolithography technique, it was found that by changing the physical shape of the mask directly varied the exposure time at different points, forming structures with definable surface topographies (e.g. cylinders with blazed or stepped cross-sections along their length). The advantages and limitations of these techniques are presented, highlighting the fabrication processes currently being developed to realise novel structures.