NEA-0589 RICE/CEGB.

RICE-CEGB, Long-Term Actinides and Fission Products Inventory of Irradiated Fuel

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROBLEM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: RICE/CEGB.

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2. COMPUTERS

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Program name	Package id	Status	Status date
RICE/CEGB	NEA-0589/01	Tested	01-FEB-1980

Machines used:

Package ID	Orig. computer	Test computer
NEA-0589/01	IBM 3033	IBM 3033

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3. DESCRIPTION OF PROBLEM OR FUNCTION

Calculates the actinide and/or fission product inventories of irradiated nuclear fuel. The range of actinide and fission product isotopes considered is large enough to permit studies to be made of the effect of decades-long irradiations and geological cooling times. Output consists of inventories, activities, biological hazards, decay heating, gamma spectra and macroscopic cross sections, among others.

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4. METHOD OF SOLUTION

For burnup periods the nonlinear physical system is approximated by a linear physical system with the cross sections and flux levels being held constant in any given time step and changed discontinuously between time steps, the length of the time step being chosen to make the approximations as good as required.

The stiff set of differential equations for the actinide case is solved by using the implicit trapezoidal rule and Aitken's formula for accelerated convergence of a series. For the fission product case the implicit Euler rule is used; the algorithm is specially designed to solve sets of linear first order differential equations. For cooling periods analytical solutions are used.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:

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6. TYPICAL RUNNING TIME

Sample problem 72 GWY/TE HTR burnup took 2.6 seconds on IBM 3033.

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7. UNUSUAL FEATURES OF THE PROGRAM

A library is included containing 74 actinide isotopes ranging from 206 PB to 253 ES, and 425 fission product isotopes ranging from 72 ZN to 163 DY.

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8. RELATED AND AUXILIARY PROGRAMS

A short program RICESTUP is included to read the formatted version of the library and create several unformatted libraries to be read by RICE.

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9. STATUS

Package ID	Status date	Status
NEA-0589/01	01-FEB-1980	Tested at NEADB

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10. REFERENCES:

NEA-0589/01, included references:

- S. Nair:
  RICE - A Reactor Inventory Code for Calculating Actinide and
  Fission Product Arisings Using a Point Source Model
  RD/B/N4138, IMAC/P(77)10, Central Electricity Generating Board,
  Berkeley Nuclear Laboratories (October 1977).
- S. Nair and M.J. Henning:
  A User's Guide to the Reactor Inventory Code RICE
  RD/B/N4079, IMAC/P(77)20, Central Electricity Generating Board,
  Berkeley Nuclear Laboratories (January 1978).

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11. MACHINE REQUIREMENTS

364 K bytes of fast core memory, 7 disc or tape files, on IBM computers.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0589/01	FORTRAN-IV

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

IBM MVS/SE.
There are no operating system dependent routines.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

A set of FORTRAN subroutines called DECINF are included to process free format card input; the PACK routine uses LOGICAL*1 data type. The test problem was run with a dummy FORTRAN clock routine.

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15. NAME AND ESTABLISHMENT OF AUTHOR

          S. Nair
          Central Electricity Generating Board
          Research Division
          Berkeley Nuclear Laboratories
          Berkeley, Gloucestershire GL13 9PB
          United Kingdom.

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16. MATERIAL AVAILABLE

NEA-0589/01

File name	File description	Records
NEA0589_01.001	RICESTUP, BCD TO BIN CONVERTER (F4,EBCDIC)	45
NEA0589_01.002	ACTINIDES AND FISSION PRODUCT BCD LIB.	4800
NEA0589_01.003	SOURCE (F4,EBCDIC)	4731
NEA0589_01.004	DECINF , FREE FORMAT INPUT ROUTINES (F4)	280
NEA0589_01.005	INPUT DATA FOR S.P.	6
NEA0589_01.006	PRINTED OUT OF S.P.	1194
NEA0589_01.007	JCL AND INFORMATION	98