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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
Carl A. Detrick, James L. Kelly
Nuclear Technology | Volume 7 | Number 5 | November 1969 | Pages 472-477
Radiation | doi.org/10.13182/NT69-A28450
Articles are hosted by Taylor and Francis Online.
The quantitative effects of certain factors on the radiation-induced graft polymerization of methyl methacrylate (MMA) and paper (cellulose) were determined. All irradiations were performed in a medium-intensity gamma radiation field created by neutron activation of 55Mn. Resultant radiation dose rates varied between 1.4 and 3.2 × 105 rads/h, initially, and diminished with a 2.58-h half-life. Sample preparation was an important variable in that paper samples immersed in MMA and irradiated immediately thereafter exhibited no grafting, whereas samples soaked 4 and 24 h prior to irradiation yielded increasing amounts of grafting for the same radiation dose. Hydroquinone, which serves as an ideal inhibitor for bulk MMA, yielded no induction period at all for the MMA-cellulose system. The effects of oxygen on the graft polymerization of MMA were similar to its effects on the homopolymerization of MMA. The use of acetone as a solvent for MMA enhanced the amount of graft polymerization. Even higher yields per absorbed dose were obtained using a water-acetone-MMA solution. Furthermore, no pre-irradiation “soak” was necessary to achieve grafting at relatively low absorbed doses in the MMA-solvent systems.