Accession Number : AD0618125

Title :   SPECIFICATIONS FOR FLAME 1: A THREE-DIMENSIONAL REACTOR DEPLETION CODE FOR THE UNIVACLARC.

Descriptive Note : Applied mathematics lab. research and development rept.,

Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON D C

Personal Author(s) : Cuthill,Elizabeth H. ; Schot,Joanna W. ; Gibson,Barbara ; Mejia,Raymond

Report Date : JUN 1965

Pagination or Media Count : 135

Abstract : The mathematical and programming specifications for FLAME 1, a three-dimensional reactor depletion code for the UNIVAC-LARC, are described. Two, three, or four lethargy groups and up to approximately 100,000 mesh points are permitted, depending on the number of groups. Mesh spacing is variable in the x-, y-, and z-directions, and up to 400 different material compositions may be distributed among the regions comprising the reactor. Thirty elements, including 13 time-dependent isotopes, are treated in the depletion scheme. The full coefficient matrix generated for each group contains of the order of 100,000 x 100,000 entries. A detailed description of the calculations performed by the code is presented, including the mathematical derivation of the normalized block iteration method used for calculating flux values and the extrapolated power method for computing the fission source and criticality factor. (Author)

Descriptors :   (*FUEL BURN UP, COMPUTER PROGRAMMING), (*COMPUTER PROGRAMMING, FUEL BURN UP), (*REACTOR CONTROL, COMPUTER PROGRAMMING), SPECIFICATIONS, FUEL CONSUMPTION, REACTOR FUEL ELEMENTS, MATRICES(MATHEMATICS), GROUPS(MATHEMATICS), ITERATIONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE