1. NAME AND TITLE OF DATA LIBRARY

KDDK: Measured Results of Delayed Beta- and Gamma-Ray Spectra due to Thermal-Neutron Fission of U-235.

2. NAME AND TITLE OF DATA RETRIEVAL PROGRAMS

FINBT.IBM: Program for FINal BeTa processing.

FINGM.IBM: Program for FINal GaMma processing.

3. CONTRIBUTOR

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

4. HISTORICAL BACKGROUND AND INFORMATION

The data were obtained during the course of a program to measure the total energy-release rates following shutdown of a uranium-fueled reactor. They are the intermediate data, integrated and summed together to get the information desired by the funding agent, NRC. The spectral data are considered to be a bonus coming from the method chosen to get the desired results. They are the original set of data and do not supersede any other data set.

5. APPLICATION OF THE DATA

The data are believed to represent the results of a benchmark experiment and will be used to compare with the output of summation calculation codes, e.g., ORIGEN. The total energy-release rate was obtained by measuring separately the energy-release rates for each component, one set of data for gamma energy-release using a gamma-ray detector and another set for beta decay energy-release using a beta-ray detector. The authors believe that the most important use of the data in the report is to guide calculational efforts to a point where they can be used to correctly compute the fission-product decay heat for any operation history.

6. SOURCE AND SCOPE OF DATA

The data are from an experiment and were not generated by another computer code. The energy group structures and time (following fission) groups were chosen for experimental reasons. The data are given as spectral distributions, differential cross-section values, and beta-ray energy intervals. Counting time intervals range from 1 second for times-after-fission < 6 sec to 4000 sec for times-after-fission ~ 104 sec.

7. DISCUSSION OF THE DATA RETRIEVAL PROGRAM

The major use for the data retrieval programs is to indicate the format used to retrieve the data.

8. DATA FORMAT AND COMPUTER

BCD card images; IBM 360 or PDP-10.

9. TYPICAL RUNNING TIME

Less than 10 sec on the IBM 360.

10. REFERENCE

J. K. Dickens, T. A. Love, J. W. McConnell, J. F. Emery, K. J. Northcutt, R. W. Peelle, and H. Weaver, "Delayed Beta- and Gamma-Ray Production Due to Thermal Neutron Fission of ²³5U Spectral Distributions for Times After Fission Between 2 and 14000 sec: Tabular and Graphical Data," NUREG/CR-0162, ORNL/NUREG-39 (August 1978).

11. CONTENTS OF LIBRARY

Included are the referenced document and one (1.2MB) DOS diskette which contains the Beta- and Gamma-Ray spectra for 1 second thermal neutron irradiation of U²³⁵, and their spectrum output.

12. DATE OF ABSTRACT

March 1985.