MEASUREMENT AND ANALYSIS OF NUCLEAR RADIATION HEATING IN SELECTED SHIELDING MATERIALS.
GENERAL DYNAMICS FORT WORTH TX NUCLEAR AEROSPACE RESEARCH FACILITY
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An experiment was performed to measure the heating rates in slabs of zirconium hydride, beryllium oxide, Inconel-X, and 6 percent borated polyethylene. Measurements were also obtained with the zirconium hydride shielded by boral and by boral plus lead and with the beryllium oxide shielded by lead. The measured data are compared to calculations of the heating rates obtained by SHADRAC, a procedure that uses moments-method data. The neutron flux distributions in the test configurations were obtained by means of DTK, an S sub N radiation transport code. These neutron distributions were used in hand calculations of secondary-gamma source terms used as input in SHADRAC to compute the heating rates from the capture and scatter of neutrons. The measured and calculated heating rates differ in magnitude by less than 25 percent at all detector positions, and the curves of the heating rates as a function of material thickness show good agreement in shape. The heating from the primary gamma radiation is the most important component of the total heating rate calculated for all configurations. Author
- Nuclear Instrumentation