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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Hungyuan B. Liu
Nuclear Technology | Volume 109 | Number 3 | March 1995 | Pages 314-326
Technical Paper | Fission Reactor | doi.org/10.13182/NT95-A35080
Articles are hosted by Taylor and Francis Online.
A design for a slab reactor to produce an epithermal neutron beam and a thermal neutron beam for use in neutron capture therapy (NCT) is described. A thin reactor with two large-area faces, a “slab” reactor, was planned using eighty-six 20% enriched TRIGA fuel elements (General Atomics, San Diego, California) and four B4C control rods. Two neutron beams were designed: an epithermal neutron beam from one face and a thermal neutron beam from the other. The planned facility, based on this slab-reactor core with a maximum operating power of 300 kW, will provide an epithermal neutron beam of 1.8 × 109 nepi/cm2·s intensity with low contamination by fast neutrons (2.6 × 10−13Gy· cm2/nepi) and gamma rays (<1.0 × 10−13 Gy·cm2/nepi) and a thermal neutron beam of 9.0 × 109 nth/cm2·s intensity with low fast-neutron dose (1.0 × 10−13 Gy·cm2/nth) and gamma dose (<1.0 × 10−13 Gy·cm2/nth). Both neutron beams will be forward directed. Each beam can be turned on and off independently through its individual shutter. A complete NCT treatment using the designed epithermal or thermal neutron beam would take 30 or 20 min, respectively, under the condition of assuming 10 µg 10B/g in the blood. Such exposure times should be sufficiently short to maintain near-optimal target (e.g., 10B, 157Gd, and 235U) distribution in tumor versus normal tissues throughout the irradiation. With a low operating power of 300 kW, the heat generated in the core can be removed by natural convection through a pool of light water. The proposed design in this study could be constructed for a dedicated clinical NCT facility that would operate very safely.