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Orlando, FL|Renaissance Orlando at SeaWorld
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Latest News
Bipartisan nuclear waste bill introduced in U.S. House
U.S. representatives Mike Levin (D., Calif.) and August Pfluger (R., Texas) have introduced the bipartisan Nuclear Waste Administration Act of 2024, which would establish an independent agency to manage the country’s nuclear waste.
In addition to establishing a new, single-purpose administration to manage the back end of the nuclear fuel cycle, the bill would direct a consent-based siting process for nuclear waste facilities and ensure reliable funding for managing nuclear waste by providing access to the Nuclear Waste Fund. According to Pfluger and Levin, the bill’s provisions are in line with recommendations from the Blue Ribbon Commission on America’s Nuclear Future.
Masaki Takeuchi, Tatsuo Sugie, Shigeharu Takeyama, Kiyoshi Itami
Fusion Science and Technology | Volume 69 | Number 3 | May 2016 | Pages 655-665
Technical Paper | doi.org/10.13182/FST15-191
Articles are hosted by Taylor and Francis Online.
An important issue for ITER divertor infrared (IR) thermography (IRTh) is that changes in the emissivity of tungsten divertor targets resulting from depositions; erosions; and dependences on temperature, wavelength, and surface roughness affect the temperature measurement, which requires an accuracy of 10%. Therefore, we investigated the emissivity dependences of tungsten samples in ITER-grade tungsten and validated the proposed in situ calibration method for emissivity evaluation by using an IR laser in laboratory experiments. The emissivity of the tungsten samples had a strong dependence on surface roughness of 1.0 to 5.9 μm. In the two-color method, by measuring the radiances of the tungsten sample in two wavelengths of 3.35 and 4.67 μm, the change of the ratio of the emissivities did not satisfy the measurement requirement. Thus, an in situ calibration method of emissivity is needed. The emissivity evaluated using the in situ calibration method was in good agreement with the emissivity evaluated from the radiance for tungsten samples at temperatures of 22°C, 100°C, and 400°C. Consequently, the in situ calibration method for emissivity evaluation using an IR laser was successfully validated. More work is needed for the application in IRTh.