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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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
DOE issues new NEPA rule and procedures—and accelerates DOME reactor testing
Meeting a deadline set in President Trump’s May 23 executive order “Reforming Nuclear Reactor Testing at the Department of Energy,” the DOE on June 30 updated information on its National Environmental Policy Act (NEPA) rulemaking and implementation procedures and published on its website an interim final rule that rescinds existing regulations alongside new implementing procedures.
Yu Ji, ZeGuang Li, Jun Sun, ErSheng You, MingGang Lang, Lei Shi
Nuclear Technology | Volume 206 | Number 8 | August 2020 | Pages 1155-1170
Technical Paper | doi.org/10.1080/00295450.2020.1760703
Articles are hosted by Taylor and Francis Online.
Nuclear thermal propulsion (NTP) could be an advanced technology to facilitate a new and excellent rocket engine that would at least double the performance of the best conventional chemical rocket engines. NTP has been under development for several decades and was selected as the leading candidate technique for the manned mission to Mars, as suggested in Design Reference Architecture 5.0. During development, many concepts have been proposed, designed, and tested. Among which, the particle bed reactor (PBR) is the one of highest performance, and its compact and lightweight features make it ideal for space applications. In this paper, the thermal-hydraulic characteristics of a PBR are mainly investigated through two studies. The first study is to evaluate whether the principles derived from the PBR of uniform heat release could be applied in the cases of a nonuniform heating profile. The second study is to analyze the effects of some aspects, including porosity of the hot frit and cold frit, power shift, inlet temperature of the coolant on the internal flow, and heat transfer processes in the PBR of a nonuniform heat release. These findings may provide technical support for the subsequent design and optimization of the PBR.