Abstract
A procedure has been developed for measuring and reporting neutron exposure for radiation damage studies. The neutron spectrum shape is calculated and its magnitude determined by the reaction Fe 54 (n,p)Mn 54. A unit, called RDU, is used for reporting exposure. To test this procedure, steel specimens were irradiated in three very different reactor spectra. The exposures were expressed in RDU's and the resulting embrittlement compared. Satisfactory agreement was obtained. The procedure proved to be easy to use. A new method for reducing a limited amount of irradiation data was devised to handle irradiations done in a facility where the neutron flux varied appreciably from place to place.
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