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Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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
TerraPower begins U.K. regulatory approval process
Seattle-based TerraPower signaled its interest this week in building its Natrium small modular reactor in the United Kingdom, the company announced.
TerraPower sent a letter to the U.K.’s Department for Energy Security and Net Zero, formally establishing its intention to enter the U.K. generic design assessment (GDA) process. This is TerraPower’s first step in deployment of its Natrium technology—a 345-MW sodium fast reactor coupled with a molten salt energy storage unit—on the international stage.
T. X. Bruce Qu, Thomas E. Blue, C. K. Chris Wang, Reinhard A. Gahbauer
Nuclear Technology | Volume 91 | Number 3 | September 1990 | Pages 404-412
Technical Paper | Radioisotopes and Isotope Separation | doi.org/10.13182/NT90-A34461
Articles are hosted by Taylor and Francis Online.
Previously, a neutronic study of an accelerator-based epithermal neutron irradiation facility (AENIF) for boron neutron capture therapy (BNCT) was performed using three-dimensional Monte Carlo transport calculations. The major components of the AENIF are a radio-frequency quadrupole proton accelerator, a 7Li target, and a moderator assembly. Neutrons are generated by bombarding the 7Li target with 2.5-MeV protons. The neutrons emerging from the 7Li target are too energetic to be used for BNCT and are moderated as they traverse the moderator assembly to the patient. The design of a moderator assembly for an AENIF for the treatment of glioblastoma is reviewed, and this design is compared with the design of a moderator as sembly for an accelerator thermal neutron irradiation facility (A TNIF) for the treatment of superficial melanoma. The ATNIF moderator assembly consists of a 50-cm-high × 30-cm-diam cylinder of D2O, surrounded on its top and sides by a 40-cm-thick graphite reflector. This moderator assembly creates, at the surface of a large phantom at its irradiation port, a boron absorbed dose rate of (3.2 ± 0.2) cGy/(min · mA), for a tumor 10B concentration of 24 µg of10B per gram of tissue. For a single-session dose equivalent of 40 Sv to the tumor, the treatment time is 13 min for a 30-mA proton beam. With different moderator assemblies, a 30-mA, 2.5-MeV proton accelerator can be used to treat both superficial and deep lesions from melanomas and gliomas.
