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X-energy raises $700M in latest funding round
Advanced reactor developer X-energy has announced that it has closed an oversubscribed Series D financing round of approximately $700 million. The funding proceeds are expected to be used to help continue the expansion of its supply chain and the commercial pipeline for its Xe-100 advanced small modular reactor and TRISO-X fuel, according the company.
W. A. Haller, R. W. Perkins, J. M. Nielsen
Nuclear Technology | Volume 3 | Number 7 | July 1967 | Pages 436-443
Technical Paper and Note | doi.org/10.13182/NT67-A27842
Articles are hosted by Taylor and Francis Online.
An instrumental method has been devised and tested for the direct measurement of 137Cs in fission product mixtures. The method is based on beta-gamma coincidence counting, and involves beta counting of the mixture in a liquid or plastic scintillator while simultaneously measuring the gamma-ray spectrum with a NaI(Tl) detector-multichannel analyzer arrangement. Cesium-137 is unique among the long-lived fission products in that its decay (actually its 137mBa daughter, T1/2 = 2.8 min) does not involve a prompt beta-gamma coincidence. The 137Cs is then measured from a noncoincidence gamma spectrum with comparatively little interference from the other fission products. The method is not directly applicable to recently irradiated fuels but has been applied to the quantitative measurement of 137Cs in 8-month-, 1.3-year- and 2.0-year-old material with standard deviations of about 3, 0.8, and 0.7%, respectively.
