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Latest News
QSA Global, Niowave to collaborate on Ac-225 production using Ra-226
QSA Global, a provider of radioisotope products, and Niowave, a Michigan-based producer of medical radioisotopes, announced that the companies will codevelop a scalable radium purification process using Niowave’s radium-226 processing technology to meet the demand for actinium-225, an alpha-emitter used in the treatment of cancer. According to the companies, the strategic partnership marks a significant advancement in the field of radiopharmaceutical technology, enhancing the supply chain for critical radioisotopes, including Ac-225.
Niowave uses a closed-loop cycle to produce high-purity Ac-225 and other alpha emitters from Ra-226 using a superconducting electron linear accelerator. According to the company’s website, the electron beam impinges on a photon converter to irradiate the Ra-226, inducing a photon-neutron reaction to Ra-225, which decays to Ac-225.
Saurin Majumdar, Joërg Wolters
Fusion Science and Technology | Volume 29 | Number 3 | May 1996 | Pages 353-364
Technical Paper | First-Wall Technology | doi.org/10.13182/FST96-A30721
Articles are hosted by Taylor and Francis Online.
Bree diagrams are developed for shakedown and ratcheting analyses of a typical fusion reactor first wall subjected to cyclic thermal and steady primary stresses. The stresses are assumed to be predominantly of the bending type. The first loading/unloading cycle is analyzed analytically as well as numerically using elasticplastic beam bending theory. The general problem of elastic shakedown is solved using the shakedown theorem of perfect plasticity. The problem of plastic strain cycling with and without ratcheting is solved using numerical analysis.