Delayed neutrons from the neutron irradiation of ???U

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Title: Delayed neutrons from the neutron irradiation of ???U
Author: Heinrich, Aaron David
Abstract: A series of experiments was performed with the Texas A &M University Nuclear Science Center Reactor (NSCR ) to verify ? ? ?U delayed neutron emission rates . A custom device was created to accurately measure a sample's pneumatic flight time and the Nuclear Science Center's (NSC's ) pneumatic transfer system (PTS ) was redesigned to reduce a sample's pneumatic flight time from over 1 ,600 milliseconds to less than 450 milliseconds . Four saturation irradiations were performed at reactor powers of 100 and 200 kW for 300 seconds and one burst irradiation was performed using a $1 .61 pulse producing 19 .11 MW -s of energy . Experimental results agreed extremely well with those of Keepin . By comparing the first ten seconds of collected data , the first saturation irradiation deviated ~1 .869 % with a dead time of 2 microseconds , while the burst irradiation deviated ~0 .303 % with a dead time of 5 microseconds . Saturation irradiations one , three and four were normalized to the initial count rate of saturation irradiation two to determine the system reproducibility , and deviated ~0 .449 % , ~0 .343 % and ~0 .389 % , respectively .
URI: http : / /hdl .handle .net /1969 .1 /85943
Date: 2008-10-10

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Delayed neutrons from the neutron irradiation of ???U. Available electronically from http : / /hdl .handle .net /1969 .1 /85943 .

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