1. NAME AND TITLE
LGH-G: Calculation of Gamma Radiation through Partially Shielded Gaps (Buildup Factor
Method in Taylors Approximation).
Gesellschaft für Kernenergieverwertung in Schiffbau und Schiffahrt mbH (GKSS), HamburgGeesthacht, Germany.
3. CODING LANGUAGE AND COMPUTER
FORTRAN IV; IBM 360/370.
4. NATURE OF PROBLEM SOLVED
The flux, dose rate or related quantities resulting from a plane infinite source with cosn-distribution is calculated at points behind a plane two layer shield, one layer penetrated by a
cylindrical duct. The duct may be adjacent to the source or the observation point. Method is
kernel integration with Taylor-approximation for build-up factor.
5. METHOD OF SOLUTION
The integration is done analytically as far as possible and numerically by application of
Simpson's rule. By dividing the mesh intervals successively by two, a predefined accuracy will be
6. RESTRICTIONS OR LIMITATIONS
7. TYPICAL RUNNING TIME
Compilation requires 21 seconds. To calculate a 2-material shielding problem without build-up
factor, 6 seconds are required for one point on shielding surface. With build-up factor 18 seconds
are required on TR 440.
8. COMPUTER HARDWARE REQUIREMENTS
LGH-G is operable on the IBM 360/370 computers.
9. COMPUTER SOFTWARE REQUIREMENTS
A FORTRAN IV compiler is required.
R. Fiebig and P. Rybaczok, "LGH-G, A Program for the Calculation of Gamma Radiation
Through Partially Shielded Gaps," ORNL-tr-2831; GKSS 73/E/17 (1973).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (1.2MB) DOS diskette which contains the source
code and sample problem input and output.
12. DATE OF ABSTRACT
October 1974; updated August 1975.
KEYWORDS: GAMMA-RAY; KERNEL