Neutron Flux and Spectra Measurements in the Sandia Pulsed Reactor Facility (SPRF).
Neutron Flux and Spectra Measurements in the Sandia Pulsed Reactor Facility (SPRF).

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Published: 1962

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Neutron flux measurements were made in the reactor building of the Sandia Pulsed Reactor Facility using threshold detectors for the neutrons with energies greater than 10 kev. Bare and cadmium-covered gold were used for measurement of the thermal neutron fluxes. Midplane measurements were made as a function of distance outward from the reactor vertical centerline in several different directions within the building. In addition, detailed measurements were made on a midplane traverse around the circumference and a vertical traverse from the base of the safety screen over the domed top and to the base on the opposite side. All measurements were free field'' in the sense that no spectrum-perturbing experiments were near the reactor during these measurements. The fluxes above 10 kev follow a (1/r)/sup 2/ attenuation, whereas the thermal fluxes show very little attenuation with distance. The reactor is, to a good approximation, a point isotropic neutron emitter. (auth).

Measurement of Neutron Spectra in Varied Environments by the Foil-activation Method with Arbitrary Trials
Measurement of Neutron Spectra in Varied Environments by the Foil-activation Method with Arbitrary Trials

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Published: 1987

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Neutron spectra have been measured by the foil-activation method in 13 different environments in and around the Sandia Pulsed Reactor, the White Sands Missile Range Fast Burst Reactor, and the Sandia Annular Core Research Reactor. The spectra were obtained by using the SANDII code in a manner that was not dependent on the initial trial. This altered technique is better suited for the determination of spectra in environments that are difficult to predict by calculation, and it tends to reveal features that may be biased out by the use of standard trial-dependent methods. For some of the configurations, studies have also been made of how well the solution is determined in each energy region. The experimental methods and the techniques used in the analyses are thoroughly explained. 34 refs., 51 figs., 40 tabs.