Nuclear Science and Engineering · 1957 · 10 citations · 1 references
EngineeringMaterials ScienceNuclear EngineeringHeat TransferNuclear MaterialsReactor PhysicsHeat Transfer In ReactorsNuclear Material MeasurementReactor InstrumentationTemperature CoefficientsTemperature MeasurementThermal Properties Of MaterialsDirect MeasurementModerator Temperature CoefficientsReactivity Coefficient MeasurementReactivity CoefficientsReactivity Temperature CoefficientTemperature Coefficients Of ReactivityTemperature Reactivity CoefficientUranium Metal
The uranium metal temperature coefficient of reactivity has been measured in ZEEP. A uranium sample was oscillated in the reactor and the resulting modulation of reactor power was measured as a function of the sample temperature. The temperature coefficient of uniformly heated uranium rods, 3.25 cm. in diameter, immersed in a constant temperature moderator (moderator-to-uranium volume ratio 22) is deduced from this experiment. Over the range +30°C to +230°C the coefficient is dk/dT = − (1.25 ± O.09) × 10−5 per °C. Over the range +10°C to −140°C the coefficient is dk/df = −(1.58 ± 0.18) × 10−5 per °C.
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