The specific dose equivalent constants were recalculated when an error in the computer program was discovered. The error, omission of the third term in the polynomial representation of the flux-to-dose equivalent factor between 0.5 and 5 MeV, resulted in the dose factor being too high by 2% at 0.5 MeV, 0% at 1 MeV, and increasing to nearly 9% at 5 MeV. This is to be compared to the correct polynomial which gives results within 3% of the recommended standard values. The effect on the specific dose constant was much smaller, generally much less than 2%. The greatest error noted was for ^'Ca which was too high by 4.5%. Although errors of this magnitude are of little practical significance, the results have been corrected for this edition since a reprinting was necessary anyway. Some other changes were made also. These included correcting a typographical error in the '"Cs value and inserting a space where data were too crowded together.
EXREM I11 i s a computer code t o estimate the dose equivalent rate itron, electron, and gamma quivalent fro sion in contaminated water, submersion re t o a contaminated surface. There vironmental release, and exposure can begin a t t release. EXREM I11 considers contributions nuclide decay chains, For a particul a r problem the user may choose t o calculate either the dose rates, or the t o t a l doses, o r both for any of the three modes of exposure. A separate solution array i s printed for each mode of exposure. EXREM I11 i s a revised version of EXREM I1 which was available earlier.' The principal revisions include positron and electron radiatfons , lection of nuclear d a t a from a data base, variable dimensioning of large data arrays, and free field i n p u t. The code is availa n Shielding Information Center .
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