WHIRLAWAY--A THREE-DIMENSIONAL, TWO-GROUP NEUTRON DIFFUSION CODE FOR THE IBM 7090 COMPUTER

Technical Report · Tue Aug 15 04:00:00 EDT 1961

DOI:https://doi.org/10.2172/4004593· OSTI ID:4004593

Fowler, T. B.; Tobias, M. L.

WHIRLAWAY is an IBM 7090 FORTRAN programmed code for the solution of two- group neutron diffusion equations in xyz geometry. The code was designed to run under control of the IBM 7090 FORTRAN Monitor System on a machine with at least six tape units. The maximum number of mesh points is limited to 12,750. Arbitrary distributions of materials and mesh spacing are permitted. The boundary conditions are either zero flux or zero current at each of the six faces of the reactor, and the code will, if desired, compute the adjoint-flux and associated flux-adjoint-flux region integrals that are necessary for perturbation calculations. Computation time is approximately 0.006 sec per point iteration. Normally, running times are about 2 to 3 hr for a 10,000-point problem. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-15-026464
• OSTI ID: 4004593
• Report Number(s): ORNL-3150
• Country of Publication: United States
• Language: English

Related Subjects

COMPUTERS
DIFFUSION
EQUATIONS
FORTRAN
IBM 7090
MATHEMATICS AND COMPUTERS
NEUTRON FLUX
NEUTRONS
PERTURBATION THEORY
PROGRAMMING
REACTORS