| Description |
x, 120 leaves : illustrations ; 28 cm |
| Summary |
"The differential fast flux spectrum of the UMR Pool Research and Training Reactor core was determined by simultaneous activations of threshold foil detectors by neutron-nucleon reactions. This represents one phase of the composite neutron environment at two sample irradiation locations and the center of a fuel element during a power operation of 200 Kw (th). To accomplish this measurement a semiempirical least-squares approximation fitting activation date to a theoretical Cranberg U-wet fission spectrum was applied. This is a technique designed specifically for water moderated systems and takes into consideration both virgin and down-scatter neutrons. Gamma decay photopeaks were reduced using computer code PPA (Photopeak Analysis), and the differential fast neutron spectrum was resolved by computer code RUFF. The results of the method used in this work were compared with spectrum results of a previously applied weighted orthonormal method. A parameter variational study was made for determination of spectrum effects"--Abstract, leaf ii. |
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