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NRC’s Inspector General issues report
Overall findings of a survey of Nuclear Regulatory Commission personnel indicate that while the NRC maintains a few strengths compared to external benchmarks, results have declined since 2015 in a number of areas, according to a recent report from the NRC’s Office of the Inspector General (OIG).
The survey was conducted in February 2020 by Willis Towers Watson, a global risk-management, insurance brokerage, and advisory firm that has partnered with the OIG for more than 20 years to assess the NRC’s safety culture and climate, as well as other aspects of employee experience.
Fusion Science and Technology | Volume 4 | Number 3 | November 1983 | Pages 437-451
Technical Papers | Plasma Engineering | dx.doi.org/10.13182/FST83-A22793
Articles are hosted by Taylor and Francis Online.
A feedback control scenario of plasma burning in a tokamak reactor is investigated, whereby compression-expansion of the plasma provides routine control against small deviations from equilibrium, while occasional larger perturbations (expected to be of the cooling type only) are counteracted by the switching on of part of the additional heating system. The feasibility of the proposal is investigated on a profile-corrected zero-dimensional linearized model of the burning plasma, involving separate energy balances for electrons, ions, and alpha particles. Special attention is paid to control-theory features, with the aim to suitably interface them with plasma physics and fusion physics. A positive assessment concerning the feasibility of the proposed scheme is derived, with the proviso, however, that enough accuracy be obtained from the diagnostics that control the input to the feedback loop