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U.S. Department of Energy
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TWIGL; TWIGGLE; two-dimensional, two-group space-time diffusion feedback. [CDC6600; IBM360; FORTRAN IV]

Technical Report ·
OSTI ID:6233034

TWIGL solves the two-dimensional, two-group, space-time neutron diffusion equations in rectangular or cylindrical geometry in the presence of temperature feedback. The neutron diffusion and delayed precursor equations are differenced in both space and time. The thermal-hydraulic description is based on a no-boiling, one-pass model formulated in terms of regionwise-averaged coolant and fuel metal temperatures.CDC6600;IBM360; FORTRAN IV; SCOPE 2.0 (CDC6600) and OS/360; 64K memory.

Research Organization:
Westinghouse Electric Corp., West Mifflin, PA (USA). Bettis Atomic Power Lab.
OSTI ID:
6233034
Report Number(s):
ANL/NESC-338R; ON: DE83048338
Country of Publication:
United States
Language:
English