TORTSQ - A SCALE Sequence for 3-D Discrete Ordinates Calculations

摘要

In an effort to improve the usability of the TORT three-dimensional (3-D) deterministic transport code, a new sequence called TORTSQ (TORT SeQuence) has been developed within the SCALE code system. The new TORTSQ sequence provides 1. a user-friendly keyword-based input and a reduced amount of required input data, as compared to the current FIDO format TORT input; 2. automated use of point sources (incorporation of GRTUNCL3D, a first collision code); 3. built-in angular quadratures; and 4. automated, problem-dependent, cross-section library generation, including problem-dependent cross-section self-shielding and collapsing with a fixed source or an eigenvalue calculation. A major feature of the sequence is the coupling of the SCALE cross-section libraries (or any library in the AMPX master format) and the SCALE cross-section processing codes with TORT, thus eliminating the need for the use of the GIP cross-section mixing program. The option to use a GIP-generated library is retained by the sequence. The possibility of using pointwise cross sections for resonance processing is provided by the incorporation of the CENTRM module in the sequence. It is worth noting that the CSASI sequence in SCALE-5 can also be used to prepare mixed resonance self-shielded cross sections for deterministic codes such as ANISN, DORT, TORT, DANT, and PARTISN.