RSICC CODE PACKAGE CCC-693

1. NAME AND TITLE

ANITA-2000: Code System to Calculate Isotope Inventories from Neutron Irradiation for Fusion Applications.

2. CONTRIBUTORS

ENEA - Centro Ricerche, Energia 'E. Clementel,' INN-FIS-MACO, Bologna, Italy, through the NEA Data Bank, Issy-les-Moulineaux, France.

3. CODING LANGUAGE AND COMPUTER

Fortran; IBM RS/6000, LINUX, Windows PC (C00693/MNYCP/00).

4. NATURE OF THE PROBLEM SOLVED

ANITA-2000 is a code package for the activation characterization of materials exposed to neutrons in fusion machines. The main component of the package is the activation code ANITA-4M that computes the radioactive inventory of a material exposed to neutron irradiation, continuous or stepwise. It provides activity, atomic density, decay heat, biological hazard, clearance index and gamma-ray source spectra at shut down and for different cooling times. An interactive utility module, MODBIN, to produce the neutron activation cross section libraries in the required binary ANITA-4M format, is also included. The GRANITA interactive module may plot activation parameters as a function of the cooling time. The main improvements over the previous release (CCC-606/ANITA-4) include:

the number of irradiation time intervals increased to 2000;

different neutron wall loading can be used for each burn time interval;

the photon source calculation in the 18 energy group scale structure was added;

the clearance index can be calculated.

In addition, the coding language has been standardized to Fortran 95 by maintaining the backward compatibility (except for the time/date routines), so the same code package can be compiled and run on unix and on pc under both dos/windows and under linux.

5. METHOD OF SOLUTION

The mathematical solution of the problem is given in analytical form using recurrence relations. Double precision arithmetic is used.

6. RESTRICTIONS OR LIMITATIONS

None.

7. TYPICAL RUNNING TIME

Problem dependent ranging from a few seconds to several minutes.

8. COMPUTER HARDWARE REQUIREMENTS

ANITA runs on IBM RS/6000 and on personal computers running either Linux or Windows.

9. COMPUTER SOFTWARE REQUIREMENTS

The codes are intended to run under any operating system on which a Fortran compiler is available. An ANITA-2000 executable (called ANITA4M.exe) is included with the PC version of ANITA-2000. It was created with the Lahey Fortran 95 v5.5 compiler on a P3 under Windows 2000.

10. REFERENCES

D. G. Cepraga, G. Cambi, M. Frisoni, and G. C. Panini, "ANITA-2000, Activation Code Package, Manual," ERG FUS TN SIC TR 16/2000 Part I (November 2000).

D. G. Cepraga, G. Cambi, M. Frisoni, and G. C. Panini, "ANITA-2000, Activation Code Package, Validation," ERG FUS TN SIC TR 16/2000 Part II (November 2000).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and a CD which contains Fortran source, PC executables, test cases, data, and documentation written in a GNU compressed Unix tar file and a self-extracting compressed Windows file.

12. DATE OF ABSTRACT

January 2002.

KEYWORDS: ACTIVATION; ISOTOPE INVENTORY; NEUTRON; RADIONUCLIDES