DCFPAK: Dose coefficient data file package for Sandia National Laboratory Page: 25 of 52
This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to UNT Digital Library by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
CLASS: This is a character*1 variable that specifies the clearance class for inhaled
forms of the radionuclide. The dose coefficients are based on the lung model of ICRP
Publication 30, and the variable has values of "D", "W", "Y", and W"V. Class D refers
to a clearance time of days, W to a clearance time of weeks, and Y to a clearance time
of years. The less frequently used Class "V" refers to rapid clearance such as occurs
for vapor forms of some elements. If CLASS is not supplied, DCFPAK will select the
classification of the chemical form giving the highest effective dose.
AMAD: This is a real variable representing the activity median aerodynamic
diameter of the aerosol. If unspecified, a default AMAD of 1 pm is applied. If
specified, DCFPAK calculates coefficients for the user's supplied AMAD. DCFPAK
applies the value of AMAD to all chain members.
IPATH: This is a logical array (size 9) used to flag the type of dose coefficients that
are of interest to the user. IPATH should be set to "true" to return tables of dose
coefficients for all nine exposure models addressed by DCFPAK.
In addition to assembling the decay chain and the corresponding dose coefficients, DCFPAK
can be used to compute the activities of the chain members as a function of time. The calculations
assume a unit activity ofthe chain parent at time zero and no initial activity of other chain members.
To make use of this capability, the following call should be inserted into the user's driver code after
a call to DOSECOF:
CALL BIRCH(ISPEC, T, A, AINT)
The variables are defined as follows:
ISPEC: This input variable is the index number of the chain member of interest. ISPEC
ranges from 1, the chain parent, to NSPEC, the last radioactive member of the chain.
T: This input variable is the time (d) for which the activity of chain member ISPEC is to be
computed.
A: This output variable of the routine BIRCH is the activity of ISPEC at time T assuming
that one unit of activity was present at T=O for the parent and all daughter activities at that
time were zero.
AINT: The output variable is the time integrated activity of ISPEC during the period of
length T, assuming that one unit of activity was present at T=O for the parent and all daughter
activities were zero at T=0. The unit is days. The number of nuclear transformations of
ISPEC per Bq of the parent during this period would be 8.64E04 x AINT.
18* ~.-~-*.-*.--*. - ~-.,.......- -
Upcoming Pages
Here’s what’s next.
Search Inside
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
Eckerman, K. F. & Leggett, R. W. DCFPAK: Dose coefficient data file package for Sandia National Laboratory, report, July 31, 1996; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc684956/m1/25/: accessed May 15, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.