An Evaluation on the Pebble Flow Velocity in PBMR Core by Using Modified Kinematic Model
- Title
- An Evaluation on the Pebble Flow Velocity in PBMR Core by Using Modified Kinematic Model
- Author
- 김종경
- Keywords
- Pebble bed reactor; Pebble flow velocity; Kinematic model; Pebble flow experiment
- Issue Date
- 2011-05
- Publisher
- Elsevier Science LTD
- Citation
- Annals of Nuclear Energy, 2013, 55, P.322-330
- Abstract
- A pebble bed reactor is filled by a large number of pebbles, which are randomly piled up in the core region. During the process of fuel loading and extraction, the pebbles flow downward through the core. The basic physics of the dense granular flow such as pebble flow is not fully understood; hence, the dynamic core of the pebble bed reactor has been a subject of concern among designers and regulators. The kinematic model is one of the representative models for the reconstruction of the granular flow velocity, however, it is noted that there are some limitations in the reconstruction ability. In this study, a modified kinematic model was proposed to enhance the reconstruction ability of the pebble velocity profile. Pebble flow experiments were performed to derive the coefficients needed for the modified kinematic model and to verify the reconstruction ability and the applicability of the proposed method in the annular core. The modified kinematic model can contribute to accurate velocity evaluation as well as large applicability for the specific core types such as an annular core. Also, the results can be used for reference data in the design of a pebble bed reactor. (C) 2012 Elsevier Ltd. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S0306454912004902?via%3Dihubhttp://hdl.handle.net/20.500.11754/51781
- ISSN
- 0306-4549
- DOI
- 10.1016/j.anucene.2012.11.035
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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