Production Test IP-728 half-plant sodium silicate test: Interim report 1

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The radionuclides in reactor effluent are produced almost exclusively from the irradiation of patent elements which are adsorbed on the film which forms on the in-reactor surfaces. The nuclides are subsequently desorbed into the effluent water, one of the areas of activity in the research and development program directed toward reducing reactor effluent radioactivity has been to find some means of minimizing the adsorption of parent materials and/or desorption of radioisotopes. In the course of these investigations, it was shown in laboratory coupon tests that sodium silicate added to process water reduced the adsorption of arsenic by a factor of … continued below

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12 p.

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Geier, R. G. September 16, 1965.

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  • Hanford Atomic Products Operation
    Publisher Info: General Electric Co., Richland, WA (United States). Hanford Atomic Products Operation
    Place of Publication: Richland, Washington

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Description

The radionuclides in reactor effluent are produced almost exclusively from the irradiation of patent elements which are adsorbed on the film which forms on the in-reactor surfaces. The nuclides are subsequently desorbed into the effluent water, one of the areas of activity in the research and development program directed toward reducing reactor effluent radioactivity has been to find some means of minimizing the adsorption of parent materials and/or desorption of radioisotopes. In the course of these investigations, it was shown in laboratory coupon tests that sodium silicate added to process water reduced the adsorption of arsenic by a factor of five. A single-tube in-reactor test was run using a silicate addition of 20 ppm SiO{sub 2} to give some indication of the effect of flux and other reactor variables on the behavior of the silicate. The results from the test showed that the concentration of P{sup 32}, As{sup 76}, and Np{sup 239} in the effluent were reduced by a factor of two to three. Lesser reductions were obtained for other isotopes, and the Na{sup 24} concentration increased by a factor of two. This report summarizes the data obtained and observations made during the six months the test has been in operation.

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12 p.

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OSTI as DE94015584; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov

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  • Other Information: DN: Declassified

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  • September 16, 1965

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  • Nov. 28, 2018, 2:33 p.m.

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  • Dec. 13, 2018, 5:55 p.m.

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Geier, R. G. Production Test IP-728 half-plant sodium silicate test: Interim report 1, report, September 16, 1965; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1340851/: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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