1. NAME AND TITLE
PIEDEC: A Practical Internal Exposure Dose Evaluation Code.
Kansai Electric Power Company and Mitsubishi Atomic Power Industries Inc., Japan, through the
NEA Data Bank, France.
3. CODING LANGUAGE AND COMPUTER
Fortran 77; IBM 3083, FACOM-M380.
4. NATURE OF PROBLEM SOLVED
PIEDEC calculates the initial intake activity and effective dose equivalent of a worker (who ingests
radioactive nuclides by inhalation or oral intake) using measured data (whole-body counting or bioassay
5. METHOD OF SOLUTION
The transformation of radioactive nuclides in each source organ is calculated by integration of the
analytically solved retention function using the Gauss-Legendre method. The effective dose equivalent
is obtained from multiplying specific energies and the transformations. The input for gamma-ray
emitters is the internal contamination measured by the whole-body counter; for alpha- and beta-ray
emitters it is the activity in urine or faeces. The code contains two sections: initial intake activity
evaluation and dose equivalent evaluation. The first applies the retention functions of the total body
to gamma-ray emitters and excretion functions to alpha- and beta-ray emitters. The excretion functions
have been obtained from the excretion models as prepared in this study.
6. RESTRICTIONS OR LIMITATIONS
The code is restricted to 14 radionuclides.
7. TYPICAL RUNNING TIME
The sample input was tested on the IBM 3083 at NEA Data Bank. It took 125.57 seconds.
8. COMPUTER HARDWARE REQUIREMENTS
PIEDEC runs on the IBM 3083 and FACOM-M380.
9. COMPUTER SOFTWARE REQUIREMENTS
The code was written in Fortran 77. On the IBM 3083, the compiler used was VS Fortran Level
a. Included in the documentation:
"PIEDEC, A Practical Internal Exposure Dose Evaluation Code," NEA 1084 (January 20, 1989).
b. Background information:
S. Iwai, K. Tanaka, A. Ikeoka, T. Mimura and K. Matsutani, "Practical Internal Dose Evaluation
Based on ICRP 30 Model IAEA-SM-276/07," pp. 459-473 in Proc. International Symposium on the
Assessment of Radioactive Contamination in Man, (1984) IAEA, Vienna.
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (1.2 MB) DOS diskette.
12. DATE OF ABSTRACT
KEYWORDS: INTERNAL DOSE; MODEL MAN; RADIONUCLIDES