**1. NAME AND TITLE**

PUSHLD: Gamma-Ray Three-Dimensional Calculation of Dose Rates from Plutonium in Various Geometries.

**AUXILIARY ROUTINE**

FIXEXP: Iron-Standard Library Routine.

**2. CONTRIBUTOR**

Hanford Engineering Development Laboratory, Richland, Washington.

**3. CODING LANGUAGE AND COMPUTER**

FORTRAN IV and Assembler Language; CDC CYBER-74.

**4. NATURE OF PROBLEM SOLVED**

PUSHLD calculates gamma-ray dose rates at various distances from plutonium in three-dimensional source and shield geometries.

**5. METHOD OF SOLUTION**

The point kernel method is used to calculate the dose rate for a particular gamma-ray energy from a volume element of the source. Corrections are made for secondary radiation and calculations are performed analytically insofar as possible. Since simple analytical solutions are not possible for most geometries, results are usually obtained by numerical integration using Simpson's rule.

**6. RESTRICTIONS OR LIMITATIONS**

None noted.

**7. TYPICAL RUNNING TIME**

A typical running time has not been determined by RSIC.

**8. COMPUTER HARDWARE REQUIREMENTS**

PUSHLD was designed to run on a CDC CYBER-74 computer.

**9. COMPUTER SOFTWARE REQUIREMENTS**

A FORTRAN IV compiler and associated CDC assembler is required.

**10. REFERENCES**

J. N. Strode, "Transmittal of PUSHLD Gamma Shielding Code and Information Package" (October 1975).

J. N. Strode and H. H. Van Tuyl, *"*PUSHLD: A Code for Calculation of Gamma Dose Rates
from Plutonium in Various Geometries," HEDL-TME 73-89.

**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 an iron-standard library routine.

**12. DATE OF ABSTRACT**

October 1978; reviewed March 1982, updated January 1983, January 1985.

**KEYWORDS: ** GAMMA-RAY; PLUTONIUM; SLAB; COMPLEX GEOMETRY; CYLINDRICAL GEOMETRY; SPHERICAL GEOMETRY; NUMERICAL INTEGRATION; KERNEL