Fixation of aqueous tritiated waste in polymer impregnated concrete and in polyacetylene

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Description

Tritiated aqueous waste can be used to hydrate hydraulic cement producing a concrete that contains a network of interconnected porosity. Such a product is subject to water intrusion and subsequent tritium loss by leaching and exchange. Techniques have been developed to impregnate this porosity with styrene monomer which is then polymerized in situ, resulting in a concrete that is essentially impermeable while its strength, durability, and resistance to chemical attack are significantly improved. Tritium bulk leach rates as low as 1.68 x 10$sup -4$ g/(cm$sup 2$-day) have been measured for polymer-impregnated concrete in water. An adsorbent additive can be incorporated ... continued below

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21 p.

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Colombo, P.; Neilson, R. Jr. & Steinberg, M. January 1, 1975.

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Tritiated aqueous waste can be used to hydrate hydraulic cement producing a concrete that contains a network of interconnected porosity. Such a product is subject to water intrusion and subsequent tritium loss by leaching and exchange. Techniques have been developed to impregnate this porosity with styrene monomer which is then polymerized in situ, resulting in a concrete that is essentially impermeable while its strength, durability, and resistance to chemical attack are significantly improved. Tritium bulk leach rates as low as 1.68 x 10$sup -4$ g/(cm$sup 2$-day) have been measured for polymer-impregnated concrete in water. An adsorbent additive can be incorporated to increase the specific tritiated waste loading of the concrete. Depending upon the formulations, these composites incorporate 5.8 to 8.3 liters HTO per cubic foot. Tritiated aqueous waste can also be fixed in polymeric form as polyacetylene through reaction with calcium carbide to form tritiated acetylene which is subsequently polymerized. Acetylene polymerization is accomplished by either $sup 60$Co gamma irradiation or thermal catalysis over cupric oxide. The tritiated polyacetylene produced can contain up to 50 atomic percent tritium and is essentially non-leachable, insoluble, thermally stable to 325$sup 0$C, and chemically inert. The bulk leach rate of tritiated polyacetylene was determined to be of the order of 1.8 x 10$sup -8$ g/(cm$sup 2$-day). Radiolysis by $sup 60$Co gamma irradiation results in a G value for hydrogen production of 0.15 molecules/100 eV. Tritiated polyacetylene can be incorporated as an aggregate in concrete, polymer concrete, or polymer impregnated concrete to form a monolithic solid. (auth)

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21 p.

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Dep. NTIS

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  • International conference on radiation effects and tritium technology for fusion reactors, Gatlinburg, Tennessee, USA, 30 Sep 1975

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  • Report No.: BNL--20898
  • Report No.: CONF-750989--4
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 4096104
  • Archival Resource Key: ark:/67531/metadc868639

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 1, 1975

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

Description Last Updated

  • Oct. 12, 2017, 4:38 p.m.

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Colombo, P.; Neilson, R. Jr. & Steinberg, M. Fixation of aqueous tritiated waste in polymer impregnated concrete and in polyacetylene, article, January 1, 1975; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc868639/: accessed April 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.