BNWIGL; UNIWIGL; two-group time-dependent one-dimensional diffusion. [UNIVAC1108,1100; CDC6600; FORTRAN (99%) and COMPASS (1%) (CDC6600), FORTRAN V (UNIVAC1108)]

Technical Report ·

OSTI ID:6232800

Heeb, C M

BNWIGL and UNIWIGL solve the one-dimensional, two-energy group, time-dependent diffusion theory equation with thermal feedback. The stand-alone, one-dimensional, steady-state diffusion theory code, HFN, is incorporated to perform critical searches and to determine the initial direct and adjoint fluxes for input to the time-dependent calculation. Problems in slab, cylindrical, and spherical geometries with up to six delayed neutron groups can be solved. Thermal feedback is introduced through the solution of the non-boiling heat transfer equations. Transients can be initiated either from changes in the thermal-hydraulic parameters or by simulated control rod movement in either of the two independent pseudo-rod models. Effects of two and three dimensions can be simulated through the use of interpolation tables for control rod worths and Doppler weighting factors.UNIVAC1108,1100;CDC6600; FORTRAN (99%) and COMPASS (1%) (CDC6600), FORTRAN V (UNIVAC1108); SCOPE 3.4.4 (CDC6600), EXEC8 (UNIVAC1108); If the programs are segmented, 154,000 (octal) words of memory are required for execution of UNIWIGL (CDC6600), and 51,000 words of memory are required for BNWIGL (UNIVAC1108).

• Research Organization: Los Alamos National Lab., NM (USA)
• OSTI ID: 6232800
• Report Number(s): ANL/NESC-870R; ON: DE83048870
• Country of Publication: United States
• Language: English

Related Subjects

654003* -- Radiation & Shielding Physics-- Neutron Interactions with Matter
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
B CODES
COMPUTER CODES
CYLINDERS
DIFFERENTIAL EQUATIONS
ENERGY TRANSFER
EQUATIONS
FEEDBACK
HEAT TRANSFER
NEUTRON DIFFUSION EQUATION
ONE-DIMENSIONAL CALCULATIONS
SLABS
SPACE-TIME
SPHERES