✦ LIBER ✦
Non-uniform flow distribution in the steam generator U-tubes of a pressurized water reactor plant during single- and two-phase natural circulations
✍ Scribed by Jae-Jun Jeong; Moonkyu Hwang; Young Jin Lee; Bub Dong Chung
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 298 KB
- Volume
- 231
- Category
- Article
- ISSN
- 0029-5493
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✦ Synopsis
A flow model is formulated to analyze the single-and two-phase flow characteristics in the primary side of a vertical, inverted U-tube steam generator. Using the flow model, a pressure drop-mass flow rate curve is derived. It is shown that the curve has a negative slope and, thus, flow excursion instability can occur under certain low-flow conditions. The stability criterion and its physical interpretation are given. Nonuniform flow behaviors in multiple U-tubes of different tube lengths are also discussed.