Recent developments in the TWODANT system of codes for criticality safety

Conference · Sun Sep 19 04:00:00 EDT 1993

OSTI ID:10143381

Parsons, D. Kent ^[1]; Alcouffe, Raymond E. ^[1]; Marr, Duane R. ^[1]; Brinkley, Forrest W. ^[1]

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1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

The application of deterministic, discrete ordinates codes to criticality safety problems can be a very useful complement to analyses performed using Monte Carlo methods. This is especially so if there is a need for dose or flux maps of the system or if configuration perturbations are to be studied. In these latter two situations, it is difficult to obtain reliable Monte Carlo results due to statistical effects. Deterministic calculations are also useful as an independent check and verification of Monte Carlo results. The TWODANT system of discrete ordinates codes` has recently been enhanced for criticality safety analysis. In addition to ONEDANT, TWODANT, and TWOHEX, the TWODANT system now includes TWODANT/GQ and THREEDANT. These two new code modules expand the applicability of the TWODANT system. These new capabilities will be demonstrated on a representative sample of nuclear criticality safety problems. First, TWODANT/GQ and THREEDANT will be described. Salient features of each code module will be discussed. Calculational results obtained by each will be presented and compared with each other and with Monte Carlo results. Finally, some guidelines for the effective use of the TWODANT system on criticality applications will be given.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 10143381
• Report Number(s): LA-UR--93-807; CONF-930907--2; ON: DE93010716
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220100
220900
97 MATHEMATICS AND COMPUTING
CALCULATION METHODS
COMPUTER CALCULATIONS
CRITICALITY
CYLINDRICAL CONFIGURATION
MESH GENERATION
Nuclear Criticality Safety Program (NCSP)
ONEDANT
REACTOR SAFETY
REACTORS
SAFETY
T CODES
THEORY AND CALCULATION
THREEDANT
TWODANT
URANIUM