Standardized Radiation Shield Design Method: 2005 HZETRN

Research committed by the Langley Research Center through 1995 resulting in the HZETRN code provides the current basis for shield design methods according to NASA STD-3000 (2005). With this new prominence, the database, basic numerical procedures, and algorithms are being re-examined with new methods of verification and validation being implemented to capture a well defined algorithm for engineering design processes to be used in this early development phase of the Bush initiative. This process provides the methodology to transform the 1995 HZETRN research code into the 2005 HZETRN engineering code to be available for these early design processes. In this paper, we will review the basic derivations including new corrections to the codes to insure improved numerical stability and provide benchmarks for code verification.

[1]  T. Cleghorn,et al.  Comparison of the SPE model with proton and heavy ion data. , 1999, Radiation measurements.

[2]  Fan Lei,et al.  MULASSIS: a Geant4-based multilayered shielding simulation tool , 2002 .

[3]  D. B. Davis,et al.  The Boeing Co. , 1993 .

[4]  F. Cucinotta,et al.  Improvements in computational accuracy of BRYNTRN (a baryon transport code) , 1991 .

[5]  William Atwell,et al.  International Space Station Radiation Shield Augmentation Optimization , 2003 .

[6]  John W. Norbury,et al.  Transport Methods and Inter-actions for Space Radiations , 2003 .

[7]  John W. Poston,et al.  Computer Techniques in Radiation Transport and Dosimetry , 1981 .

[8]  J. Wilson,et al.  A simple model for straggling evaluation. , 2002, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms.

[9]  J. Wilson,et al.  Computational methods for the HZETRN code. , 2005, Advances in space research : the official journal of the Committee on Space Research.

[10]  Contribution of High Charge and Energy (HZE) Ions During Solar-Particle Event of , 1999 .

[11]  R C Singleterry,et al.  A comparison of the multigroup and collocation methods for solving the low-energy neutron Boltzmann equation. , 2000, Canadian journal of physics.

[12]  J. Ranft,et al.  The Fluka and Kaspro Hadronic Cascade Codes , 1980 .

[13]  John W. Wilson Analysis of the theory of high energy ion transport , 1977 .

[14]  John W. Wilson,et al.  Perturbation theory for charged-particle transport in one dimension , 1975 .

[15]  J. Wilson,et al.  The fragmentation of 670A MeV neon-20 as a function of depth in water. III. Analytical multigeneration transport theory. , 1993, Radiation research.

[16]  B. Ganapol,et al.  A Hierarchy of Transport Approximations for High Energy Heavy (HZE) Ions , 1989 .

[17]  D. A. Seidel,et al.  8. PERFORMING ORGANIZATION , 1991 .

[18]  J. Wilson,et al.  A New Method for Calculating Low Energy Neutron Flux , 2006 .

[19]  H. Spieler,et al.  The fragmentation of 670A MeV neon-20 as a function of depth in water. I. Experiment. , 1989, Radiation research.

[20]  F. Cucinotta,et al.  International space station: A testbed for experimental and computational dosimetry , 2006 .

[21]  F. Cucinotta Calculations of cosmic-ray helium transport in shielding materials , 1993 .

[22]  J. Wilson,et al.  Medium modified nucleon-nucleon cross sections in a nucleus. , 1999, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms.

[23]  Takashi NAKAMURA,et al.  Development of General-Purpose Particle and Heavy Ion Transport Monte Carlo Code , 2002 .

[24]  Ralph H. Thomas,et al.  Operational Radiation Safety Program for Astronauts in Low-Earth Orbit:A Basic Framework , 2004 .

[25]  J. R. Thomas,et al.  EVALUATION OF THE RADIATION HAZARD DUE TO SOLAR-PARTICLE EVENTS. , 1963 .

[26]  W. John,et al.  Contribution of High Charge and Energy (HZE) Ions During Solar-Particle Event of September 29, 1989 , 1999 .

[27]  F. Cucinotta,et al.  Emerging Radiation Health‐Risk Mitigation Technologies , 2004 .

[28]  H. Bertini Nonelastic interactions of nucleons and pi mesons with complex nuclei at energies below 3 GeV. , 1972 .

[29]  John W. Wilson,et al.  Proton dose approximation in arbitrary convex geometry , 1974 .

[30]  D. C. Irving,et al.  VALIDITY OF THE STRAIGHTAHEAD APPROXIMATION IN SPACE-VEHICLE SHIELDING STUDIES. PART II. , 1968 .

[31]  J. Wilson,et al.  Nuclear absorption cross sections using medium modified nucleon-nucleon amplitudes. , 1998, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms.

[32]  G. A. Feldman,et al.  Solutions to the Low Energy Neutron Boltzmann Equation for Space Applications , 2003 .

[33]  J W Wilson,et al.  Overview of radiation environments and human exposures. , 2000, Health physics.