1. NAME AND TITLE OF DATA LIBRARY

 DRALIST: Radioactive Decay Data for Application to Radiation Dosimetry and Radiological Assessments.

2. NAME AND TITLE OF DATA RETRIEVAL PROGRAMS

 MEDPRINT: Print Data Available in MEDLIST Format.

3. CONTRIBUTORS

 Oak Ridge National Laboratory, Oak Ridge, Tennessee.
 EG&G Energy Measurements, Inc., Goleta, California.

4. HISTORICAL BACKGROUND AND INFORMATION

 DRALIST is a data set of radioactive decay energies, spectra, half lives, and other information for 561 radionuclides in DLC-46/MEDLIST output format and also in an abbreviated form. The data are derived from the Evaluated Nuclear Data Structure File (ENSDF) using the MEDLIST program. A modified version of the MEDPRINT program with improved editing capability plus a file of decay branching information are provided.  The data in DRALIST represent an update to DLC-046/MEDLIST and to DLC-062/NFCLIST as documented in ORNL-5114 and ORNL/NUREG/TM 102.  Different and more recent radioactive decay data are available in the ICRP-38 data package DLC-172/NUCDECAY, which was released in November 1994.

5. APPLICATION OF THE DATA

 The estimation of radiation dose to man from either external or internal exposure to radionuclides requires a knowledge of the energies and intensities of the atomic and nuclear radiations emitted during the radioactive decay process. The availability of evaluated decay data for the large number of radionuclides of interest is of fundamental importance for radiation dosimetry. The report deals with radionuclides occurring naturally in the environment, those of potential importance in routine or accidental releases from the nuclear fuel cycle, those of current interest in nuclear medicine and fusion reactor technology, and some of those of interest in the estimation of annual limits on intake via inhalation and ingestion for occupationally exposed individuals.

6. SOURCE AND SCOPE OF DATA

 The radioactive decay data tabulated for the report result from the continual expansion and updating of the data base published in ORNL/NUREG/TM-102. In addition to the radionuclides of interest in the nuclear fuel cycle, the data base comprises most of the nuclides occurring naturally in the environment, those of current interest in nuclear medicine and fusion reactor technology, and some additional radionuclides of use in the estimation of annual limits of intake and derived air concentrations for occupationally exposed individuals. The current data base contains approximately 500 radionuclides. It is believed that, with few exceptions, the decay data contained in this report are not likely to change significantly over the next few years as the result of new measurements.

7. DISCUSSION OF THE DATA RETRIEVAL PROGRAMS

 MEDPRINT reads and selectively lists data available in MEDLIST format. Each nuclide in the radioactive decay data file has a sequential MAT number which is input to MEDPRINT to select nuclides to be edited. The Vax version is interactive and was the EG&G contribution to this package.

8. DATA FORMAT AND COMPUTER

 EBCDIC card images; IBM or Vax.

9. TYPICAL RUNNING TIME

 Not applicable.

10. REFERENCES
a) Included in documentation:

 R. W. Roussin, "Discussion of the Contents of the DRALIST Data Package," Informal Notes (January 1981).

D. C. Kocher, "Description of the Simplified Format for the Radionuclides in DRALIST (KOCHER'S FORMAT)" (April 1980).

D. C. Kocher, "Description of the Format for the Branching Fractions for Radionuclides in DRALIST" (April 1980).

"Listing of the Decay Branching Fractions for the Radionuclides in DRALIST" (January 1981).

 "Titles of the Radionuclide Data Sets in DRALIST" (January 1981).

 D. K. Trubey, "MEDPRINT Program Instructions" (January 1981).

D. C. Kocher, Radioactive Decay Tables - A Handbook of Decay Data for Application to Radiation Dosimetry and Radiological Assessments, DOE/TIC-11026 (1981).

b) Background information:
M. J. Martin, "Nuclear Decay Data for Selected Radionuclides," ORNL-5114 (March 1976).
D. C. Kocher, Nuclear Decay Data for Radionuclides Occurring in Routine Releases from Nuclear Fuel Cycle Facilities," ORNL/NUREG/TM 102 (August 1977).

11. CONTENTS OF LIBRARY

 Included are the referenced documents and one DS/HD 1.44 MB diskette in a DOS self-extraction compressed file which contains the MEDPRINT source program, the DRALIST radioactive decay data, JCL and input data for MEDPRINT sample edit, the MEDPRINT sample edit output, listing of titles of isotopes in DRALIST, decay branching data for isotopes in DRALIST, and the DRALIST radioactive decay data; total records 38,736.

12. DATE OF ABSTRACT

 May 1985; revised June 1988; July 1998.