1. NAME AND TITLE
HORN: A Computer Code To Analyze The Gas-Phase Transport Of Fission Products In
Reactor Cooling System Under Severe Accidents.
Japan Atomic Energy Research Institute, through NEA Data Bank, Gif-sur-Yvette Cedex, France.
3. CODING LANGUAGE AND COMPUTER
Fortran 77; IBM 3083.
4. NATURE OF PROBLEM SOLVED
HORN calculates the transport of volatile fission products in a dry primary cooling circuit under
severe accidents of water reactors.
5. METHOD OF SOLUTION
HORN determines the chemical forms of fission products both in the bulk flow and at the wall by
the gas-liquid-solid equilibrium model. The results are used to calculate the diffusional deposition rates
of vapors and to estimate the nucleation rates of aerosols. The number of fission product elements is
minimized by using the periodicity of elements and by treating less volatile elements collectively as one
imaginary element which always behaves like an aerosol.
6. RESTRICTIONS OR LIMITATIONS
The elements considered are H, O, B, Kr, Xe, Cs, I, Te, Sb, Ag, Cd, and Ba.
7. TYPICAL RUNNING TIME
The sample input was tested on the IBM 3083 at NEA Data Bank. It took 205 seconds.
8. COMPUTER HARDWARE REQUIREMENTS
HORN runs on the IBM 3083.
9. COMPUTER SOFTWARE REQUIREMENTS
The code was written in Fortran 77. On the IBM 3083, the compiler used was VS Fortran Level
M. Uchida and H. Saito, "HORN: A Computer Code To Analyze the Gas-Phase Transport Of
Fission Products In Reactor Cooling System Under Severe Accidents," JAERI-M 86-158 (October 7,
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one DS/DD (360 K) 5.25 inch diskette.
12. DATE OF ABSTRACT
KEYWORDS: FISSION PRODUCTS; HEAT TRANSFER; REACTOR ACCIDENT