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NEA-1265 HERMES-KFA.

HERMES-KFA, High-Energy Radiation Transport by Monte-Carlo

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1. NAME OR DESIGNATION OF PROGRAM:  HERMES-KFA.
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2. COMPUTERS
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Program name Package id Status Status date
HERMES-KFA NEA-1265/02 Arrived 24-NOV-1998

Machines used:

Package ID Orig. computer Test computer
NEA-1265/02 UNIX W.S.
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3. DESCRIPTION OF PROGRAM OR FUNCTION

HERMES-KFA consists of a set of Monte Carlo Codes used to simulate particle radiation and interaction with matter. The main codes are HETC, MORSE, and EGS. They are supported by a common geometry package, common random routines, a command interpreter, and auxiliary codes like NDEM that  is used to compute the deexitation photons from nuclear deexitation  after spallation processes. The codes have been modified so that any particle history falling outside the domain of the physical theory of one program can be submitted to another program in the suite to complete the work. Also response data can be submitted by each program, to be collected and combined by a statistic package included within the command interpreter.
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4. METHOD OF SOLUTION

The main programs within HERMES use the Monte Carlo method to simulate the history of particles moving in and interacting with matter. HETC (here HET KFA 2) uses Bertini's intra  nuclear cascade model for p, n, and pions to describe nonelastic interactions, followed by EVAP5 for the evaporation of the highly excited residual nucleus. A high energy fission model (from RAL) and a semiempirical model for elastic scattering of protons and neutrons have been added. MORSE uses neutron and gamma cross-sections to describe the behavior of low energy particles. We included a subset  of the EPR cross-section library. EGS covers the electromagnetic part of the particle showers. It uses PWLF-functions for the cross-sections precomputed by PEGS and has implemented the models of photon and electron interaction with atoms.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Problem restrictions arise from the different physical models used and from the statistical behavior of the problem itself. The prediction of particle fluxes or their induced energy dose in geometric regions, where only few particles will ever enter (for example beyond of a
bulk shield) is such statistical problem that will imply restrictions. The measure of a distinct isotope in the vector of residual nuclei is an example, where the models (here EVAP) only give a guideline of the mean residual nuclei vector but not the differential measure.
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6. TYPICAL RUNNING TIME

The time requirements depend strongly on the  complexity of the Problem in terms of
  geometry
  energy range observed
  statistical quality required for the results
  whether all HERMES programs are involved (HETC, MORSE, EGS...)
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7. UNUSUAL FEATURES OF THE PROGRAM

HERMES program suite is designed in a way that each program can be used standalone, if the given problem does not need the full description. (For example: a problem  dealing with neutrons in a reactor can be solved by MORSE alone.) When the programs work together, the result of each can be looked at separately, also the flow of particles through the program system ca be monitored and controlled. This approach makes it easier to value  the influence of the different sources of statistical and systematical errors on the final results.
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8. RELATED AND AUXILIARY PROGRAMS:
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9. STATUS
Package ID Status date Status
NEA-1265/02 24-NOV-1998 Masterfiled Arrived
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10. REFERENCES

- G. Bauer et al.:
  The ESS Target Station Concept
  ESS-96-60-T (December 1996)
NEA-1265/02, included references:
- P. Cloth et al.:
  HERMES, A Monte Carlo Program System for Beam-Materials
  Interaction Studies
  JUL-2203 (May 1988).
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11. MACHINE REQUIREMENTS

UNIX Workstation (IBM RS6000) about 100 MB free disk space.
Note: The programs in HERMES have been designed very long time ago on IBM 370, IBM 3090 and later systems running MVS and VM/CMS. The version released here is implemented on IBM RS6000 using AIX 4.1 and has been also installed on a SunSparcstation using SunOS 4.1.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-1265/02 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

IBM AIX4.1 (also  tested briefly under SunOS 4.1 and Solaris 2.5).
HERMES should also run on Cray UNICOS (the early version did).
The implementation procedures use csh and ksh scripts and Makefiles.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

   P.Cloth, D.Filges, R.D.Neef, G.Sterzenbach,
   Forschungszentrum Juelich GmbH
   D-52425 JUELICH, Germany
   e-mail contact: G.Sterzenbach@FZ-Juelich.de
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16. MATERIAL AVAILABLE
NEA-1265/02
source program   mag tapehermes.96b.tar.gz Source codes             SRCTP
test-case data   mag tapehermes.96b.tar.gz Installation procedures  DATTP
test-case data   mag tapehermes.96b.tar.gz Basic data files         DATTP
test-case data   mag tapehermes.96b.tar.gz Examples                 DATTP
report           mag tapehermes.96b.tar.gz User's guide (HTML)      REPTP
miscellaneous    mag tapegrsoft-2.1.5.tar.gz Graphic software GRSOFTMISTP
miscellaneous    mag tapegligks-4.5.17.tar.gz  GLI/GKS material     MISTP
report                   JUL-2203 (May 1988)                        REPPT
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17. CATEGORIES
  • J. Gamma Heating and Shield Design
  • K. Reactor Systems Analysis

Keywords: Monte Carlo method, collisions, gamma radiation, high-energy reactions, neutron transport equation, nuclear cascades, particles, shielding.