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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Deep Space: The new frontier of radiation controls
In commercial nuclear power, there has always been a deliberate tension between the regulator and the utility owner. The regulator fundamentally exists to protect the worker, and the utility, to make a profit. It is a win-win balance.
From the U.S. nuclear industry has emerged a brilliantly successful occupational nuclear safety record—largely the result of an ALARA (as low as reasonably achievable) process that has driven exposure rates down to what only a decade ago would have been considered unthinkable. In the U.S. nuclear industry, the system has accomplished an excellent, nearly seamless process that succeeds to the benefit of both employee and utility owner.
H. Takatsu, M. Shimizu, M. Ohkubo
Fusion Science and Technology | Volume 10 | Number 3 | November 1986 | Pages 1041-1046
Plasma Heating and System Dynamics | Proceedings of the Seveth Topical Meeting on the Technology of Fusion Energy (Reno, Nevada, June 15–19, 1986) | doi.org/10.13182/FST86-A24871
Articles are hosted by Taylor and Francis Online.
The Dynamic behavior of the JT-60 vacuum vessel was examined during its power tests to confirm the validity of the dynamic response analyses of the vacuum vessel. Observed accelerations and displacements showed good linearity with electromagnetic forces and reached maxima of 48 m/s2 in acceleration and 0.46 mm in displacement at full power operation. The observed natural frequency was approximately 50 Hz, showing good agreement with that predicted by the dynamic response analysis. Dynamic response analyses showed that the vibration mode with a natural frequency of 46.3 Hz had a displacement amplitude of around 0.1 mm at the rigid ring under the misfire start-up operation conditions. The difference between the displacement predicted in the dynamic response analyses and that observed at the lateral port could be explained by the lever ratio effect of the lateral port.
