Process improvement transition authorization IP-10-I, irradiation of alloyed dingot uranium fuel elements

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The objective of this document is to authorize large-scale irradiations of alloyed, low hydrogen, dingot uranium fuel elements in order to evaluate their suitability as a reactor fuel. Although purer than standard ingot uranium, the dingot uranium produced in the past by Mallinckrodt Chemical Plant has demonstrated inferior dimensional stability during irradiation. This instability has been manifest as warp and as swelling at the center of the fuel elements. To reduce this instability 150 ppM iron and 100 ppM silicon haze been added to refine the grain structure of the uranium. Destructive examination of grain structure and nondestructive examination of … continued below

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5 p.

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Shimer, R. D. January 21, 1960.

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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 objective of this document is to authorize large-scale irradiations of alloyed, low hydrogen, dingot uranium fuel elements in order to evaluate their suitability as a reactor fuel. Although purer than standard ingot uranium, the dingot uranium produced in the past by Mallinckrodt Chemical Plant has demonstrated inferior dimensional stability during irradiation. This instability has been manifest as warp and as swelling at the center of the fuel elements. To reduce this instability 150 ppM iron and 100 ppM silicon haze been added to refine the grain structure of the uranium. Destructive examination of grain structure and nondestructive examination of apparent core quality have indicated that this material is equivalent or superior to ingot material. In light of forecasted metal requirements, the Mallinckrodt Chemical Plant must be brought on stream as rapidly as possible. This PITA schedule will meet the programmed metal delivery requirements with a minimum of risk potential while accelerating the evaluation of dingot uranium as to its suitability as a reactor fuel. Completed irradiation performance data from small scale testing will not be available before dingot material is charged under this PITA. Therefore, the possibility exists that unforeseen dingot uranium properties will result in poor performance. Low goal discharging might be required to alleviate this problem.

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5 p.

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OSTI as DE94017210; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov

Other Information: DN: Declassified

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  • January 21, 1960

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  • Nov. 28, 2018, 2:33 p.m.

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  • Nov. 14, 2024, 2:46 a.m.

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Shimer, R. D. Process improvement transition authorization IP-10-I, irradiation of alloyed dingot uranium fuel elements, report, January 21, 1960; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1389980/: accessed February 11, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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