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Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
Standards Program
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
NWMO to select Canadian repository site this year
Canada’s Nuclear Waste Management Organization, a not-for-profit organization responsible for the long-term management of the country’s intermediate- and high-level radioactive waste, is set to select a site for a deep geologic repository by the end of the year.
Rei Kimura, Satoshi Wada
Nuclear Science and Engineering | Volume 193 | Number 9 | September 2019 | Pages 1013-1022
Technical Paper | doi.org/10.1080/00295639.2019.1576454
Articles are hosted by Taylor and Francis Online.
A small modular reactor (SMR) is a promising candidate for future nuclear energy; therefore, many organizations are developing SMRs. Some SMRs have a power output higher than 100 MW(electric). This paper, however, describes a much smaller reactor of less than 10-MW(electric) power output: a microreactor. The microreactor shares the same advantages as SMRs, i.e., passive safety, portability, and maintainability. This paper studies a calcium hydride (CaH2) heat pipe–cooled reactor in which heat pipes and CaH2 accomplish passive removal of generated heat, fuel inventory reduction, high-temperature operation, and prevention of a loss-of-coolant accident. The CaH2 allows operation at a core temperature of 800°C, which improves the efficiency of the reactor system. In the case of moderator function loss, hydrogen dissociation may occur at the higher temperature; however, negative temperature reactivity of the hydride-moderated core prevents reactor runaway. The negative temperature reactivity is realized by the poison nuclides 113Cd and 151Eu, which have a capture resonance peak at thermal energies in high-temperature operation. It was confirmed that the proposed method is capable of controlling the reactor over the whole burnup period.