NEA-1603 DCHAIN-SP 2001.

1. NAME OR DESIGNATION OF PROGRAM:  DCHAIN-SP 2001.

3. DESCRIPTION OF PROGRAM OR FUNCTION

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 new version includes corrections to known errors.

4. METHODS

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.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

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.

6. TYPICAL RUNNING TIME

The running time is about 9 minutes on a Sun UltraSparc 60 workstation for the test problems.

10. REFERENCES

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.

- Hiroshi Takada and Kazuaki Kosako:
Development of the DCHAIN-SP code for Analyzing Decay and Build-Up
Characteristics of Spallation Products
JAERI-Data/Code 99-008 (March 1999)
- T. Kai, F. Maekawa, K. Kosako, Y. Kasugai, H. Tadada and Y. Ikeda:
DCHAIN-SP 2001: High Energy Particle Induced Radioactivity Calculation Code
JAERI-Data/Code 2001-016 (February 16, 2001) (in Japanese)

11. HARDWARE REQUIREMENTS:  The source code is tuned to be executed on UNIX systems.

13. SOFTWARE REQUIREMENTS

The Unix system SUN SPARC Compiler Fortran 77 Ver. 4.0 was used for code development.

15. NAME AND ESTABLISHMENT OF AUTHORS

Center for Neutron Science
Tokai Research Establishment
Japan Atomic Energy Research Institute
Tokai-mura, Naka-gun, Ibaraki-ken
Japan

README.NOW   User instructions
installer  Script to install the code
spd.sh1  Script to install the code
spd.sh2  Script to install the code
lib\  Data libraries
src3\  Source files, makefiles for different platforms and source include files
test\  Sample problem input and output files for the different platforms
cyi\ Program CYI
JAERI-Data-Code-2001-016.pdf  Documentation
JAERI-Data-Code-99-008.pdf   Documentation