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NRC to add new items to categorical exclusions list
The Nuclear Regulatory Commission has identified five categories of action to add to its list of categorical exclusions to reduce its documentation work under National Environmental Policy Act (NEPA) procedures.
These revisions are included in the final rule, “Categorical exclusions from environmental review,” which was published in the Federal Register on March 30. The final rule will become effective on April 29.
T. Banno, S. Baba, A. Kinbara
Fusion Science and Technology | Volume 6 | Number 2 | September 1984 | Pages 499-502
Technical Paper | Selected papers from the Ninth International Vacuum Congress and the Fifth International Conference on Solid Surfaces (Madrid, Spain, September 26-October 1, 1983) | doi.org/10.13182/FST84-A23227
Articles are hosted by Taylor and Francis Online.
Two types of stainless steel, SUS304L and YUS170, are investigated by means of Auger Electron Spectroscopy and Scanning Electron Spectroscopy in order to assess some of their surface properties. In this experiment the effect of atomic hydrogen exposure on the composition of the material surfaces and on the surface topography is examined. For the irradiation with atomic hydrogen at elevated temperatures (100 °C ∼ 400 °C) an effective carbon removal cross section, σ, is obtained. The value of σ is of the order of 10−22 m2 for SUS304L and 10−23 m2 for YUS170. The surface oxygen concentration shows no decrease during the irradiation. Sulphur enrichment is detected after heating the samples due to surface segregation. The SEM observations show topographical surface changes in the grain size and in the roughness after heating and exposure to atomic hydrogen.
