The prompt neutron decay constant of the MOATA reactor and related coupled-core assemblies

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dc.contributor.authorKnott, RBen_AU
dc.contributor.authorHarries, JRen_AU
dc.date.accessioned2007-11-22T04:25:58Zen_AU
dc.date.accessioned2010-04-30T04:37:11Zen_AU
dc.date.available2007-11-22T04:25:58Zen_AU
dc.date.available2010-04-30T04:37:11Zen_AU
dc.date.issued1976-03en_AU
dc.description.abstractThe correlation functions of the neutron noise have been used to determine the prompt neutron decay constant, α, for the AAEC reactor Moata - a Universities1 Training Reactor (UTR). The basic characteristics of the UTR system are two coupled 235u fuel cores, hydrogen moderated and graphite reflected. To investigate this type of reactor in greater detail, a series of 'mockup' assemblies was constructed on the AAEC Split-table Zero-power Critical Facility. A value of α was experimentally determined for each assembly, and the effects on α of core separation, fuel arrangements, perturbations to the coupling region, and detector positions were investigated. A comparison with previous results for the Moata reactor and with results for similar UTR systems was carried out. Using a two-dimensional neutron diffusion and kinetics computer code, the prompt neutron generation time, Λ, and the effective delayed neutron fraction, β, were calculated for each assembly. The results from the two-dimensional calculations were consistent with experiment, but the difficulty of modelling the neutron leakage limited the accuracy of the calculated α. Improved agreement with experiment was obtained using a three-dimensional diffusion calculation.en_AU
dc.identifier.citationKnott, R. B., & Harries, J. R. (1976). The prompt neutron decay constant of the MOATA reactor and related coupled-core assemblies. AAEC/E380). Lucas Heights, NSW: Australian Atomic Energy Commission.en_AU
dc.identifier.govdoc599en_AU
dc.identifier.isbn0642997411en_AU
dc.identifier.otherAAEC-E-380en_AU
dc.identifier.placeofpublicationLucas Heights, New South Walesen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/589en_AU
dc.language.isoen_auen_AU
dc.publisherAustralian Atomic Energy Commissionen_AU
dc.subjectPrompt neutronsen_AU
dc.subjectNeutron diffusion equationen_AU
dc.subjectMOATA Reactoren_AU
dc.subjectDecayen_AU
dc.titleThe prompt neutron decay constant of the MOATA reactor and related coupled-core assembliesen_AU
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