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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Inkjet droplets of radioactive material enable quick, precise testing at NIST
Researchers at the National Institute of Standards and Technology have developed a technique called cryogenic decay energy spectrometry capable of detecting single radioactive decay events from tiny material samples and simultaneously identifying the atoms involved. In time, the technology could replace characterization tasks that have taken months and could support rapid, accurate radiopharmaceutical development and used nuclear fuel recycling, according to an article published on July 8 by NIST.
Samuel H. Levine, Mortimer A. Schultz, Daren Chang
Nuclear Technology | Volume 52 | Number 3 | March 1981 | Pages 347-353
Technical Paper | Fission Reactor | doi.org/10.13182/NT81-A32709
Articles are hosted by Taylor and Francis Online.
The objective of this paper is to develop a device to measure the k∞ of a spent fuel assembly used in light water reactors. A subcritical assembly having a cross configuration is designed to allow measurement of the k∞ of a spent fuel assembly by comparing the change in its multiplication with that of a fuel assembly of known k∞. Calculations have been performed using nucleonic codes to develop polynomial equations that relate the k∞ of the spent fuel assembly to measured data. The measurements involve taking count rates with the spent fuel assembly in the center position of the subcritical assembly, and the measured data are the count rate ratio of the spent fuel assembly over the count rate taken with a fuel assembly of known k∞. The polynomial equations are easy to program on a microcomputer, which, together with the subcritical assembly, form the k∞ meter.
