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Experimental studies of core flow fluctuations and neutron noise in a BWR |
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| Authors: | Kunihiko Matsubara Ritsuo Oguma Masaharu Kitamura |
| Affiliation: | Japan Atomic Energy Research Institute, Oarai Research Establishment, Oarai-machi, Higashi-ibaraki-gun, Ibaraki-ken, Japan Japan Atomic Energy Research Institute, Tokai Research Establishment, Tokai-mura, Naka-gun, Ibaraki-ken, Japan Department of Nuclear Engineering, Tohoku University, Sendai-shi, Japan |
| Abstract: | Using the instrumented fuel assemblies (IFA) installed in the Japan Power Demonstration Reactor (JPDR)-II core, fluctuations of the inlet and outlet channel flow rates were observed under both conditions of at-power operation and cold core flow circulation. The correlation analysis revealed that the flow fluctuations in any IFA channel showed almost uncorrelated cross-covariance function with other IFA channel flow. To explain the mechanism of the channel flow fluctuations, some hypothetical idea is introduced. |
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