RESEARCH ON THE RADIATION STABILITY OF ORGANIC FLUIDS. Progress Report for January 1, 1953 through September 30, 1953. Report No. 6

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Additional knowledge was gained pertaining to effects of irradiation variables, chemical components, etc., on the stability of organics. This basic program was supplemented with an applied program wherein research was undertaken of particular irterest in reactor moderator-coolart and lubricant applications. Irradiations of the capsule type in the absence of air were conducted in the MTR, BNL, and X-10 reactors under a variety of conditions in investigations of effects of temperature, flux, dosage, and organic chemical structure. The MTR gamma facility and the California Research Co/sup 60/ source were also used. With highly aromatic organics, damage measured by viscosity change was ... continued below

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Creator: Unknown. October 30, 1953.

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Additional knowledge was gained pertaining to effects of irradiation variables, chemical components, etc., on the stability of organics. This basic program was supplemented with an applied program wherein research was undertaken of particular irterest in reactor moderator-coolart and lubricant applications. Irradiations of the capsule type in the absence of air were conducted in the MTR, BNL, and X-10 reactors under a variety of conditions in investigations of effects of temperature, flux, dosage, and organic chemical structure. The MTR gamma facility and the California Research Co/sup 60/ source were also used. With highly aromatic organics, damage measured by viscosity change was found independent of irradiation temperature up to 371 deg C. Coke formation was minor, although it was universal at 426 deg C. Many fused ring and nonfused ring aromatics were stable at 371 deg C. Viscosity changes were slight, and gassing amounted to about 2 to 5 ml gas/ml fluid. Simple molecular distillations showed biphenyl, naphthalene, and 1,3-diphenylbenzene, to be 93 to 97% distillable, of which 72 to 81% was pure starting material. The stabilities of solutions of highly viscous polymers in low viscosity alkylbenzenes were studied in the presence of air with gamma radiation. Styrene-alkene copolymer, polyalkene, and polyester solutions markedly decreased in viscosity on irradiation; whereas, polystyrene solutions merely increased slowly. Comparative stabilities of representative types of organics with combined neutron and gamma radiation allowed the tentative determination, based on viscosity change, that one fast neutron (>1 Mev) causes approximately 16 times the damage of one gamma (1.6 Mev). Thermal neutrons cause insignificant damage. As a result, it is suggested that the radiation dosage to cause damage be expressed in terms of "equivalent fast neutrons," a number obtained by adding to the number of fast neutrons the damage equivalent number each of gamma rays and epithermal neutrons. (auth)

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  • Other Information: Decl. with deletions Feb. 7, 1957. Orig. Receipt Date: 31-DEC-58

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  • Report No.: TID-5148(Del.)
  • Grant Number: AT(11-1)-174
  • DOI: 10.2172/4333233 | External Link
  • Office of Scientific & Technical Information Report Number: 4333233
  • Archival Resource Key: ark:/67531/metadc1025599

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  • October 30, 1953

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  • Oct. 15, 2017, 10:09 p.m.

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RESEARCH ON THE RADIATION STABILITY OF ORGANIC FLUIDS. Progress Report for January 1, 1953 through September 30, 1953. Report No. 6, report, October 30, 1953; United States. (digital.library.unt.edu/ark:/67531/metadc1025599/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.