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Some NPR production variables

Description: In connection with current updating of the NPR testimony, calculations of NPR production parameters have been made for a variety of assumed operating conditions. All cases assume operation at full design power of 4,000 MW. Initial and final enrichments and plutonium production per MWD of exposure have been calculated for a nominal 22 lb/ft. metallic uranium fuel element at exposures of 1,000, 1,400, and 2,000 MWD/T; 23 lb/ft. fuel element at 1,000 MWD/T; 24 lb/ft. element at 1,000 and 2,000 MWD/T; a UO{sub 2} fuel element of about 12.9 lb/ft. at 2,000 and 3,000 MWD/T; and a 22 lb/ft. uranium fuel element at 1,400 MWD/T with the Zr-2 process tube replaced with a stainless steel tube of 170 mil thickness. The fuel element geometry in all cases is a tube-in-tube. All calculations for this review were made with R.O. Gumprecht`s MOFDA fuel design code for the IBM-7090. The dimensions of the basic 22 lb/ft. fuel element were Gumprecht`s current best values. For all other cases, the ratio of inner tube volume to outer tube volume was held the same as in the 22 lb/ft. case and the dimensions were adjusted by the program to obtain a balance of water temperatures in the three flow channels. The results of the calculations are summarized here.
Date: January 20, 1961
Creator: Simpson, D. E.
Partner: UNT Libraries Government Documents Department

Tritium production using highly enriched fuel

Description: Preliminary studies utilizing the MOFDA code have been made for tritium production at the K reactors using 33 and 35 grams per foot oralloy (93.5% U-235) in aluminum in conjunction with standard K5N and K5E fuel elements, respectively. For this report, it was assumed that all tritium would be produced in discrete charges of LiAl target elements. It is intended that the study will be extended at some later time to include LiAl splines. The analysis includes the effect of coolant loss on reactivity for hot-or-cold and green-or-exposed conditions for several oralloy loading fractions.
Date: December 18, 1967
Creator: Miller, R. L.
Partner: UNT Libraries Government Documents Department