Oralloy (93.2 235U) Bare Metal Annuli And Disks

Hummel, Andrew John¹ 

[1] Idaho National Lab. (INL), Idaho Falls, ID (United States)

关键词: HIGHLY ENRICHED URANIUM;    URANIUM 235;    Y-12 PLANT;    CASTING;    CYLINDERS;    RINGS;    CRITICALITY;    SAFETY;    CALCULATION METHODS;    CROSS SECTIONS;    CONFIGURATION;    SOLIDS;    STORAGE;    VERIFICATION;    MATERIALS HANDLING;    LIMITING VALUES Annuli;    Benchmark;    HEU;    ICSBEP;    Metal;    Oralloy;   

DOI  :  10.2172/1236827
RP-ID  :  INL/EXT--15-34969
PID  :  OSTI ID: 1236827
Others  :  TRN: US1600284

学科分类：工程和技术（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

A multitude of critical experiments with highly enriched uranium metal were conducted in the 1960s and 1970s at the Oak Ridge Critical Experiments Facility (ORCEF) in support of criticality safety operations at the Y-12 Plant. These experiments served to evaluate the storage, casting, and handling limits for the Y-12 Plant while also providing data for verification of different calculation methods and associated cross-sections for nuclear criticality safety applications. These included both solid cylinders and annuli of various diameters, interacting cylinders of various diameters, parallelepipeds, and reflected cylinders and annuli. The experiments described here involve a series of delayed critical stacks of bare oralloy HEU annuli and disks. Three of these experiments consist of stacking bare HEU annuli of varying diameters to obtain critical configurations. These annuli have nominal inner and outer diameters (ID/OD) including: 7 inches (") ID ??? 9" OD, 9" ID ??? 11" OD, 11" ID ??? 13" OD, and 13? ID ??? 15" OD. The nominal heights range from 0.125" to 1.5". The three experiments themselves range from 7" ??? 13", 7" ??? 15", and 9" ??? 15" in diameter, respectively. The fourth experiment ranges from 7" ??? 11", and along with different annuli, it also includes an 11" disk and several 7" diameter disks. All four delayed critical experiments were configured and evaluated by J. T. Mihalczo, J. J. Lynn, and D. E. McCarty from December of 1962 to February 1963 with additional information in their corresponding logbook.