1. NAME AND TITLE

RICE CCC: A Reactor Nuclide Inventory Code for Calculating Actinides and Fission Products.

DATA LIBRARY

RICE Data Library: Actinide Cross Sections.

2. CONTRIBUTOR

Central Electricity Generating Board, Berkeley Nuclear Laboratory, United Kingdom.

3. CODING LANGUAGE AND COMPUTER

Fortran IV; IBM 360/370.

4. NATURE OF PROBLEM SOLVED

RICE CCC calculates actinide and fission product inventories in irradiated reactor fuel.

5. METHOD OF SOLUTION

The calculational methods employed in RICE CCC are based on the point source model, i.e., nuclear effects such as self-shielding and resonance interference are ignored. Reliance is placed on a reactor physics code to generate multigroup neutron fluxes and cross-sections for those isotopes having a significant effect on reactor neutron balance while nuclear effects such as neutron self-shielding and resonance interference are assumed to be negligible for all other isotopes.

Two groups of first order, linear differential equations of order 74 (actinides) and 425 (fission products) are weakly coupled to each other but have strong internal coupling. The equations are solved using the implicit trapezoidal and Euler rules, respectively, for irradiation periods, and using analytical solutions for cooling periods.

6. RESTRICTIONS OR LIMITATIONS

(a) Cross-section energy groups < 10.

(b) Burnup interval can be divided into < 10 sub-intervals.

(c) Fractional fission rates for < 17 isotopes.

(d) No reprocessing of fission products.

7. TYPICAL RUNNING TIME

LMFBR burnup to 72 GWd/Te at 160 MW/Te, 1 year cool, 99.9% U + Pu reprocessing, cools from 1, 2, 3, 4, 5, 10, 40, 100, 400, 1000 ... up to 10⁶ years takes 68.5 secs CPU time and 280 K of core, if overlay structure is used in conjunction with a version of the code compiled under release 20.6, OPT = 2 in the IBM 370/165 computer.

8. COMPUTER HARDWARE REQUIREMENTS

The code is operable on the IBM 360/370 computers. Clock is sampled.

9. COMPUTER SOFTWARE REQUIREMENTS

A Fortran H compiler is required.

10. REFERENCES

S. Nair and M. J. Henning, "A User's Guide to the Reactor Inventory Code RICE," RD/B/N4079 (January 1978).

S. Nair, "RICE - A Reactor Inventory Code for Calculating Actinide and Fission Product Arisings Using A Point Source Model," RD/B/N4138 (October 1977).

G. A. Harte, J. Mairs, and S. Nair, "Amendments to the Data Libraries of the HYACINTH and RICE Reactor Inventory Codes," RD/B/N4582 (June 1979).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (1.2MB) DOS diskette which contains the source codes and sample problem input and output.

12. DATE OF ABSTRACT

January 1982, updated August 1991.