3. DESCRIPTION OF PROGRAM OR FUNCTION
ISO-PC is a revision to the CCC-0079/ISOSHLD-II program. It calculates dose rates from the decay of radionuclides at the exterior of simple geometric shapes. The dose rates from X-rays, gamma-rays and bremsstrahlung radiation are computed. The portion of the program which computes fission product inventories (RIBD) has been removed. The ISO-PC program is strictly a shielding code for simple arrangements of source and shields.
Version 2.1, which replaced Version 1.98 in November 1996, contains several changes and improvements:
1) three new geometries were added for follow cylinders
2) maximum number of shield regions increased from 5 to 6
3) the DELR parameter is now computed internally
4) several nuclides were added to the library
5) the definition of ICONC was expanded to include mass
concentrations
6) new NAMELIST variables were added to allow input in SI units
with standard prefix multipliers.
SOURCE AND SHIELD GEOMETRIES
1. Point source with slab shields
2. Line source with slab shields
3. Sphere with spherical or slab shields
4. Truncated cone with slab shields
5. Infinite slab or infinite plane with infinite slab shields
6. Flat disc with slab shields
7. Cylinder with cylindrical or slab shields or a combination of
one cylindrical shield with two slab shields and the region
between
8. End of a cylinder with slab shields
9. Rectangular solid with slab shields
10. Annular cylindrical source with cylindrical and slab shields
SHIELD MATERIALS
1. At most 5 shield regions, including the source
2. At most 45 shield materials may be specified for each region
3. User must specify which region to use for buildup factors
SOURCE REGION
1. Specify source strength as the total in the source region or
a uniform concentration
2. Specify source strength using library of 535 nuclides or give
photons/sec at specific energies
MISCELLANEOUS
1. 30 energy groups for photons from 10 KeV to 10 MeV
2. Final dose rate as exposure rate or dose equivalent rate
3. Use up to 40 dose points (different distances from source)
in a single case
4. Each run may have multiple cases
5. Use SI or traditional units for activity or dose rate
