Several plastic materials and one ceramic alumina were tested for possible use as electrical insulators and spacers in an electrolytic dissolver for processing irradiated nuclear fuels. They were first screened for chemical resistance to the boiling dissolver product solution composed of 1 M nitric acid and 75 g/l stainless steel metal components as nitrates. Those that were resistant were then exposed simultaneously to the boiling dissolver product solution and a gamma irradiation field. Values were obtained for the impact strength, compressive strength, and electric resistivity of the more resistant materials. Those that gave the most favorable performance were: Kynar (polyvinylidene …
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Publisher Info:
Phillips Petroleum Co. Atomic Energy Div., Idaho Falls, Idaho
Place of Publication:
Idaho Falls, Idaho
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Several plastic materials and one ceramic alumina were tested for possible use as electrical insulators and spacers in an electrolytic dissolver for processing irradiated nuclear fuels. They were first screened for chemical resistance to the boiling dissolver product solution composed of 1 M nitric acid and 75 g/l stainless steel metal components as nitrates. Those that were resistant were then exposed simultaneously to the boiling dissolver product solution and a gamma irradiation field. Values were obtained for the impact strength, compressive strength, and electric resistivity of the more resistant materials. Those that gave the most favorable performance were: Kynar (polyvinylidene fluoride) up to 1 x 10/sup 9/ rep total dose, Marlex (high density polyethylene) up to 2 x 10/sup 9/ rep total dose, G-7 glass fabric- silicone resin laminate up to 10/sup 10/ rep total dose, and ceramic alumina (AP 35) to greater than 10/sup 10/ rep total dose. If a limited service life is taken into consideration in the design of the equipment, any one of the four more resistant materials should prove acceptable for use as spacers and insulators in an electrolytic dissolver vessel. (auth)
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Decker, L. A.The Effect of Radiation and Nitric Acid-Nitrate Salt Solution on Some Non- Metallic Materials,
report,
December 10, 1962;
Idaho Falls, Idaho.
(https://digital.library.unt.edu/ark:/67531/metadc1035152/:
accessed January 21, 2026),
University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu;
crediting UNT Libraries Government Documents Department.
