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Human Factors, Instrumentation & Controls
Improving task performance, system reliability, system and personnel safety, efficiency, and effectiveness are the division's main objectives. Its major areas of interest include task design, procedures, training, instrument and control layout and placement, stress control, anthropometrics, psychological input, and motivation.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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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Latest News
NRC updating GEIS rule for new nuclear technology
The Nuclear Regulatory Agency is issuing a proposed generic environmental impact statement (GEIS) for use in reviewing applications for new nuclear reactors.
In an April 17 memo, NRC secretary Carrie Safford wrote that the commission approved NRC staff’s recommendation to publish in the Federal Register a proposed rule amending 10 CFR Part 51, “Environmental Protection Regulations for Domestic Licensing and Related Regulatory Functions.”
Justin Mart, Andrew Klein, Alexey Soldatov
Nuclear Technology | Volume 188 | Number 1 | October 2014 | Pages 8-19
Technical Paper | Fission Reactors | doi.org/10.13182/NT13-135
Articles are hosted by Taylor and Francis Online.
The elimination of soluble boron in the operation of small modular integral pressurized water reactors creates several advantages. Most of these advantages are realized by the core simplification brought on by removing the corrosive effects of soluble boron. Piping, pumps, and tanks associated with soluble boron can be completely eliminated, bringing a significant economic and safety benefit. Additionally, a whole class of accidents related to boron dilution would be eliminated by design, and any loss-of-coolant event would not be affected by the presence of soluble boron. However, removing soluble boron creates its own set of specific challenges that must be overcome. In traditional pressurized water reactors, soluble boron is used in conjunction with burnable poisons to suppress excess initial reactivity. Since boron is diluted in the coolant, its presence is felt uniformly throughout the core, and thus it uniformly reduces the excess initial reactivity. In any boron-free design, an acceptable alternative to boron must be found through the use of the other two mechanisms for reactivity control: burnable poisons and control rods. However, both methods pose challenges. Control rods are actively controlled but are discrete absorbers, locally impacting the core where they are inserted. Since they are inserted from the top of the core, their presence negatively impacts the axial neutron flux profile. This axial flux imbalance creates undesirable peaking factors, leading to reduced operating margins. Thus, the main challenge in any boron-free design concerns excess reactivity suppression and active reactivity control while maintaining a proper axial flux profile and reduced peaking factors. This paper demonstrates that an advanced control rod algorithm with multiple control rod banks can be used for this purpose to satisfy the criteria for success.