The plutonium equivalent curie function (PECi) was revised to be more consistent with the Waste Isolation Pilot Plant (WIPP) methodology described in DOE/WIPP-03-3174, Appendix B and U.S. Department of Energy guidance regarding AMAD for occupational dose conversion factors (ICRP 68). Specifically, the normalization is now done with the dose conversion factor for Pu-239 using lung absorption type M and AMAD of 5 micron (for ICRP 68). The affect of this change is evident when evaluating the PE-Ci for Pu-239 with an AMAD of 1 micron:
=PECi("Pu-239",1,68,"M",5) returns 1
=PECi("Pu-239",1,68,"M",1) returns 1.46875
Previously, the normalization was done with the same lung absorption type and AMAD as the radionuclide of interest. This caused erroneous results for some combinations.
