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Nuclear Science and Engineering
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.
E. T. Cheng, C. P. C. Wong Ga
Fusion Science and Technology | Volume 4 | Number 1 | July 1983 | Pages 164-169
Technical Paper | Nonelectrial Applications | dx.doi.org/10.13182/FST83-A22782
Articles are hosted by Taylor and Francis Online.
A scoping study was performed to explore tritium breeding and energy-temperature splits in various blanket concepts for high-temperature process heat. Temperature limits for the lithium materials necessitate two blanket zones. One delivers heat at moderate temperatures (≾600°C) and breeds tritium. The other is a nonbreeding zone that produces heat at high temperatures. We find that a system where all blanket modules breed tritium delivers more high-temperature heat than one where only some of the blanket modules produce tritium. Of those considered, a design where the high-temperature zone is placed between two breeding zones produces the highest fraction of high-temperature heat. When liquid lithium, Li7Pb2 and Li2O tritium breeding materials are employed with two breeding zones, a tritium breeding ratio of 1.1 can be achieved while delivering 30 to 40% of the blanket heat at high temperature.