NESC0270 CAESAR4/LIBLST

1. NAME OR DESIGNATION OF PROGRAM:  CAESAR4/LIBLST

3. DESCRIPTION OF PROBLEM OR FUNCTION

CAESAR4 solves    the    one-
dimensional,  multigroup,  diffusion  equations in  any  of  three
geometries  and provides  a wide  choice  of boundary  conditions,
criticality searches, edits and other auxiliary computations.

4. METHOD OF SOLUTION:  Standard finite-difference equations are used.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maxima of -
    20 regions
    20 elements in library
    12 elements per material
    10 materials
   100 intervals
    35 groups
    10 downscatter groups
20 groups and 15 elements in resonance cross section        calculation

6. TYPICAL RUNNING TIME:  1 to 3 minutes are required.

7. UNUSUAL FEATURES OF THE PROGRAM

(a) Non-homogeneous boundary conditions.
(b) Fixed source calculation.
(c) Convergence on search quantity as well as on eigenvalue of     source.
(d) Transverse buckling calculated or input as constant,  group-dependent, region-dependent or group- and     region-dependent.
(e) Option to use source from previous case to start iteration.
(f) Numerous printing options.
(g) Data edits include flux normalization, peak-to-average power,  median fission energy, median flux energy, mass fissile  elements, breeding ratio by region and by reactor, neutron  balance and reaction rates, mass and reaction rates by element,  by region and reactor, integrated fluxes, median fission,  absorption and flux energy by mesh point, total buckling     punchout for AILMOE (NESC Abstract 147).
(h) Group- or group- and region-dependent fission spectrum.
(i) Adjoint flux calculation.
(j) Perturbation calculation using the PERT4 code (NESC Abstract     304).
(k) Nine different criticality searches.
(l) Transport correction to diffusion coefficient.
(m) Microscopic cross section library.
(n) Input of microscopic and/or macroscopic cross sections.
(o) Preparation of homogenized materials by cell calculation.
(p) Resonance cross section calculation by ARES2 or by table     interpolation in cell and/or reactor calculation.
(q) Material-dependent cross section tape providing a different     microscopic cross section library for each material.
(r) Multiple case feature - only changes to previous case are  required. Cell calculation can be rerun as well as reactor     problems.

8. RELATED AND AUXILIARY PROGRAMS

(a) CAESAR4 is based on the AIM, FOG (NESC Abstract 28), FAIM (NESC      Abstract 120), PERT (NESC Abstract 30) and ARES2 programs.
(b) The microscopic library program, LIBLST.

10. REFERENCES

- R.A. Blaine, Atomics International Environment Report (May 1967).

- D.C. Baller:
  CAESAR, Conversion to System/360
  AI-66-MEMO-167, Vol. 1 (December 1966).
- D.C. Baller and R.A. Blaine:
  LIBLST, Conversion to System/360
  AI-66-MEMO-166, Vol.1 (December 1966).
- D.C. Baller and R.A. Blaine:
  LIBLST, A Library Preparation Program for the CAESAR IV Code
  AI-66-MEMO-123 (August 1966).

11. MACHINE REQUIREMENTS:  256K bytes

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:   OS/360.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHOR

                 R. A. Blaine*
                 Supervisor, Reactor Computing Systems Unit
                 Mathematics and Computer Sciences
                 Atomics International
                 P. O. Box 309
                 Canoga Park, California  91304
*Present address-IBM Palo Alto Scientific Center
                 Palo Alto, California  95014

File name	File description	Records
NESC0270_01.001	SOURCE & DATA 360/65	9434
NESC0270_01.002	OUTPUT	992
NESC0270_01.003	LIBLST & 18-GROUP DATA	706
NESC0270_01.004	LIBLST OUTPUT	588
NESC0270_01.005	ARES LIBRARY	375