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EXPERIMENTS WITH DIDO/PLUTO MOCK-UPS IN DIMPLE

Technical Report ·
OSTI ID:4316615
A series of experiments carried out in Dimple with mock-ups of the Dido/ Pluto reactors are described. The observed critical conditions for the clean void free reactor were found to be in considerable disagreement with the original estimates. The flux distributions in cores formed from fuel of two different enrichments (46 and 93% U/sup 235/, respectively) were measured. The reactivity controlled by the principal safety devices, by the empty experimental tubes, and by a number of specimens in the experimental holes have been determined by experiment and, where possible, compared with two group perturbation theory. In spite of the clean core reactivity discrepancy a selfconsistent scale of reactivity was established which enables the criticality conditions for various loadings of the reactor to be predicted. It was not however possible to relate this static reactivity scale to the kinetic behavior of the reactor. (auth)
Research Organization:
Gt. Brit. Atomic Energy Research Establishment, Harwell, Berks, England
NSA Number:
NSA-12-003197
OSTI ID:
4316615
Report Number(s):
AERE-R/R-2337
Country of Publication:
United Kingdom
Language:
English

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