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Fusion Science and Technology
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.
J. Stephen Herring, Vikram N. Shah, S. Zia Rouhani
Fusion Science and Technology | Volume 4 | Number 2 | September 1983 | Pages 1384-1391
Magnet Engineering | dx.doi.org/10.13182/FST83-A23050
Articles are hosted by Taylor and Francis Online.
This study considers ways that the proposed Engineering Test Reactor (ETR), or the proposed International Tokamak Reactor (INTOR), can be used for magnet performance tests that would be useful for the design and operation of the Demonstration Tokamak Power Plant (DEMO). Such testing must not interfere with the main function of the ETR/INTOR as an integrated fusion reactor. A performance test plan for the ETR/INTOR magnets is proposed and appropriate tests on the magnets for each phase of the ETR/INTOR operation are described. The suggested tests would verify design requirements and monitor long-term changes due to radiation. This paper also summarizes the design and operational performance of existing superconducting magnets and identifies the known failures and their predominant causes. In addition, existing radiation dose-damage information and criteria that relate material property change with component failure are combined with predicted neutron and gamma dose rates at the ETR/INTOR magnet position to estimate the time to insulator and conductor failure in this reactor. Long-term operation of magnets in a pulsed plasma environment such as in the ETR/INTOR, however, may aggravate the effect of gamma and neutron radiation on the insulators. To provide more accurate time-to-failure information for magnet component material, accelerated irradiation of magnet material coupons in the ETR/INTOR and in other irradiation facilities is suggested.