CCC-0617 QBF.

1. NAME OR DESIGNATION OF PROGRAM:  QBF (Code System to Calculate
Radiation Dose Rates Relative to Spent Fuel Shipping Casks).

3. DESCRIPTION OF PROGRAM OR FUNCTION

QBF calculates and plots in a short running time, three dimensional radiation dose rate distributions in the form of contour maps on specified planes resulting from cylindrical sources loaded into vehicles or ships. Shielding effects by steel walls and shielding material layers are taken into account in addition to the shadow effect among casks. This code system identifies the critical points on which to focus when designing the radiation shielding structure and where each of the spent fuel shipping casks should be stored. The code GRAPH reads the output data file of QBF and plots it using the HGX graphics library. QBF unifies the functions of the SMART (NEA 1046) and MANYCASK (NEA 1047) codes.

4. METHOD OF SOLUTION

An analytical expression is introduced to describe radiation dose rate distribution functions around a cylindrical radiation source as a result of integration on the volume type radiation source. The concept of a shadow function is introduced to describe radiation shielding effect among sources. The introduction of the analytical shadow function expression is very effective for decreasing running time.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The graphics routines require the HGX library for the NEC PC-9801.

6. TYPICAL RUNNING TIME

For the two dimensional 6,000 mesh points, it takes about 20 minutes with the personal computer PC-9801 (VX-21).

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS:

10. REFERENCES:

- H. Yamakoshi:
  Description of the QBF Code System
  (1993)
- H. Yamakoshi:
  Simulation of Radiation Dose Rate Distributions Around Casks in
  Ships and Vehicles by Using QBF Code for PC-9801 Computer
  (1992)
- H. Yamakoshi:
  New Principle for Efficiency Calculating Radiation Dose Rate
  Distributions in Ships Loading Multiple Shipping Casks Containing
  Spent Nuclear Fuel
  J. Nucl. Sci. Technol., Vol. 25, pp 563-573 (July 1988)

11. MACHINE REQUIREMENTS

QBF was developed on the NEC PC-9801 and has  been ported to an IBM PC-486. HGX is available only for PC-9801 and  will not run on IBM PCs. IBM compatible users of GRAPH must replace  the graphics subroutine calls.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

Under DOS 5.0 the Silicon Valley Software C3 F77 compiler and linker version 2.8.2 were used to create the executable file included in the package. F77L was the compiler for this code system on the PC-9801.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHORS

Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, U. S. A.

Developed by:   The Ship Research Institute, Tokyo, Japan

README.TXT Description of QBF system
QBF.FOR Source code (use to create qbf.exe)
IN.DAT Input file for QBF
GRAPH.FOR Srce code for graphics interface
QBF.EXE Executable file for QBF
Description of the QBF Code System (1993)
Report Simulation of Radiation... (1992)
J.Nucl.Sci.Technol.Vol.25,pp 563-573,Jul 88