RSICC CODE PACKAGE CCC-712

1. NAME AND TITLE

DCHAIN-SP 2001: Code System for Analyzing Decay and Build-up Characteristics of Spallation Products.

2. CONTRIBUTOR

Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, Japan.

3. CODING LANGUAGE AND COMPUTER

Fortran 77; Sun, Dec, HPUX-9, IBM, PC Linux (C00712/MNYWS/01).

4. NATURE OF PROBLEM SOLVED

DCHAIN-SP 2001 estimates the nuclide inventories and radiation environment of high energy accelerator related facilities and was designed to resolve issues regarding spallation neutron utilization facilities. DCHAIN-SP2001 is an update of DCHAIN-SP. For analyzing the decay and build-up characteristics of spallation products, DCHAIN-SP was developed on the basis of CCC-370/DCHAIN2 by revising the decay data and implementing the neutron cross section data. The decay data are newly processed from the data libraries of EAF 3.1, FENDL/D-1 and ENSDF. The neutron cross section data taken from FENDL/A-2 are also prepared to take account of the transmutation of nuclides by the neutron field at the produced position.

The February 2004 update to the RSICC package includes some bug fixes to the code and the addition of a new report JAERI-Data/Code 2001-016 which is mostly written in Japanese with some appendices written in English.

5. METHOD OF SOLUTION

DCHAIN -SP solves the time evolution of decay and build-up of nuclides in every decay chain by the Bateman method. It can calculate the nuclide inventory, radioactivity, decay heat and gamma-ray energy spectra on the basis of the nuclide production rate calculated by the nucleon-meson transport code NMTC/JAERI97.

6. RESTRICTIONS OR LIMITATIONS

Nuclear reactions induced by neutrons with energies below 20MeV in the radiation field produced in the spallation target are taken into account in the code. However, due to the lack of available cross section data, nuclear reactions above 20MeV are not treated in the present release. The code cannot estimate the build-up of fission products by the fission reaction because fission yield data are not implemented in the present library, so that the applicable atomic number range is effectively limited to less than 83 although decay data and neutron reaction cross section data are prepared for nuclides with atomic number 1 through 100.

7. TYPICAL RUNNING TIME

The running time was less than 10 minutes on the systems tested for installation and sample case.

8. COMPUTER HARDWARE REQUIREMENTS

The source code is tuned to be executed on UNIX systems and has run on SUN, DEC, IBM and HP workstations. It has also run under Linux.

9. COMPUTER SOFTWARE REQUIREMENTS

The Unix system SUN SPARC Compiler Fortran 77 Ver. 4.0 was used for code development. The code was tested at RSICC on Sun Ultra-SparcStation, Dec/Alpha 500au, IBM RS/6000 590, and on an AMD Athlon running RedHat Linux 7.3 with GNU Fortran 0.5.26.

10. REFERENCES

a: included in documentation:

H. Takada and K. Kosako, "A Code System for Analyzing Decay and Build-up Characteristics of Spallation Products," JAERI-Data/Code-99-008 (March 1999).

T. Kai, F. Maekawa, et al., "DCHAIN-SP2001: High Energy Particle Induced Radioactivity Calculation Code," JAERI-Data/Code 2001-016 (In Japanese) (February 2001).

b: background information:

K. Tasaka, "DCHAIN2: A Computer Code for Calculation of Transmutation of Nuclides," JAERI-M-8727 (March 1980).

W. B. Wilson, T.R. Ekbland, M. Herman, R.E. Macfarlane, D.W. Muir, "CINDER'90 Code for Transmutation Calculation," G. Reffo, A. Venture, C. Grandi (eds.): Proc. Of Int. Conf. On Nucl. Data for Soc. And Technol., Trieste, 19-24 May 1997, Conf. Proc. Vol. 59, Part II, pp. 1454-1457 1997).

J. Bell, "ORIGEN The ORNL Isotope Generation and Depletion Code," ORNL-4628 (1973).

H. Takada, N. Yoshizawa, K. Kosako, K. Ishibashi, "An Upgrade Version of Nucleon Meson Transport Code, NMTC/JAERI97," JAERI-Data/Code 98-005 (1998).

H. Beteman, Proc. Cambridge Phil. Soc. Vol. 15, 423, 1910.

11. CONTENTS OF CODE PACKAGE

Included on the distribution CD are the referenced documents in 10.a and a Unix compressed tar file which includes source codes, installation script, sample input and output transmitted.

12. DATE OF ABSTRACT

September 2002, revised February 2004.

KEYWORDS: BURNUP; GAMMA-RAY; HIGH ENERGY; ISOTOPE INVENTORY; SPALLATION; RADIONUCLIDES