1. NAME AND TITLE
CITATION-LDI 2 : Nuclear Reactor Core Analysis Code System.
AUXILIARY CODE: CITALDI-PC: List-directed input version
CITAXSEC: A cross section processing code for CITATION-PC and CITALDI-PC.
Oak Ridge National Laboratory, Oak Ridge, Tennessee.
3. CODING LANGUAGE AND COMPUTER
FORTRAN, PC386 (C00643/PC386/02).
4. NATURE OF PROBLEM SOLVED
CITATION is designed to solve problems using the finite difference representation of neutron diffusion theory, treating up to three space dimensions with arbitrary group to group scattering. X-y-z, theta-r-z, hexagonal z, and trigonal z geometries may be treated. Depletion problems may be solved and fuel managed for multi-cycle analysis. Extensive first order perturbation results may be obtained given microscopic data and nuclide concentrations. Statics problems may be solved and perturbation results obtained with microscopic data. This version of CITATION was released by ORNL as CITATION - Rev. 2, Supplement 3 in July 1972 and ran on mainframes. It was first ported to PC by AECL in October 1988. CITATION-PC, added to the package in March 1996, involved minor changes including the removal of overlay statements introduced in 1988. CITADLI-PC is a new modified version with list-directed input. The codes in this package accept cross sections in CITATION format. Macroscopic data may be entered according to format specifications in Section 008 of the published report. Microscopic data format is specified in Section 105. In the January 1998 update, CITAXSEC was added to the package to process an ISOTXS binary microscopic cross section file to make an ASCII file which CITATION can use directly as part of the input data.
5. METHOD OF SOLUTION
Explicit, finite difference approximations in space and time have been implemented. The neutron-flux-eigenvalue problems are solved by direct iteration to determine the multiplication factor or the nuclide densities required for a critical system.
6. RESTRICTIONS OR LIMITATIONS
Unusual Features: CITATION is considered unusual in that it should be relatively easy to modify the contents or to add routines. Effective techniques are incorporated to determine a critical system. More than one set of microscopic cross sections may be used in a system and nuclide behavior can be followed on a sub zone scale within depletion regions. The user has flexible control over the route of a calculation as well as the edit of results.
7. TYPICAL RUNNING TIME
Run time is 15 to 45 minutes for the included test cases on a 486 DX running at 50 MHZ.
8. COMPUTER HARDWARE REQUIREMENTS
CITATION 2.0 runs on personal computers equipped with an 80386 processor or better. At least 578K RAM must be available (use NORTON SI if possible to check). There cannot be any other resident programs (including PRINT). If you are using the shell command, make sure the e parameter does not exceed 800. This is necessary to allow the largest possible array size in the complied code. A numeric math coprocessor is required. CITAXSEC will run on a 386, 486, or Pentium PC. The memory and disk requirements are minimal and are determined at run-time by the code.
9. COMPUTER SOFTWARE REQUIREMENTS
The executables were created with the Lahey Fortran V5.1 and 5.2 compilers under DOS 6. They can be run in a DOS window of Windows95.
T. B. Fowler, "CITATION-PC README File" (February 1996).
T. B. Fowler, "CITALDI-PC README File (LDI = 'List Directed Input')" (March 1996).
T. B. Fowler, D. R. Vondy, G. W. Cunningham, "Nuclear Reactor Core Analysis Code: CITATION," ORNL-TM-2496, Rev. 2, with Supplements 1, 2, and 3 (October 1971).
11. CONTENTS OF CODE PACKAGE
Included are referenced document and source, executables, and test cases on two DS/HD 3.5-in. (1.44 MB) diskettes in self-extracting compressed DOS files. No cross sections are included.
12. DATE OF ABSTRACT
September 1995, revised March 1996, January 1998, March 1999.
KEYWORDS: FUEL MANAGEMENT; REACTOR PHYSICS; CRITICALITY CALCULATIONS; COMPLEX GEOMETRY; DIFFUSION THEORY; MICROCOMPUTER.