A Re-Analysis of Historical Los Alamos Critical Assembly Reaction Rate Measurements

A.C. Kahler, M. MacInnes, M.B. Chadwick, A. Lyoussi
2016 EPJ Web of Conferences  
Starting in the 1950s and continuing into the early 1970s, a number of foil irradiations and fission chamber measurements were made in a variety of Fast critical assemblies at Los Alamos National Laboratory. These include (i) Godiva, a bare HEU spherical assembly; (ii) Flattop-25, a spherical assembly consisting of an HEU core and a natural uranium reflector; (iii) Jezebel, a bare 239 Pu assembly; and (iv) Flattop-Pu, a spherical assembly consisting of a 239 Pu core and a natural uranium
more » ... ural uranium reflector. In most instances the irradiations occur at or near the center of the assembly, but in selected instances data were obtained for a radial traverse extending into the Flattop reflector region. Measurements were made for a number of threshold reactions, including 45 Sc(n,2n) 44m Sc, 51 V(n, ) 48 Sc, 75 As(n,2n) 74 As, 89 Y(n,2n) 88 Y, 90 Zr(n,2n)
doi:10.1051/epjconf/201610604007 fatcat:temgjv7735gwtgd6zps6lofh6i