Steam condensation inside a vertical tube with noncondensable gas
Passive containment cooling systems are being studied extensively in order to enhance reactor simplicity. One promising concept is a system equipped with condensers submerged in pools located outside the primary containment vessel (PCV). Assuming a loss-of-coolant accident, steam flows into the condensers together with nitrogen, which fills the containment drywell. Then steam is condensed in the tubes, and the decay heat is released to the atmosphere by vaporization of the pool water, suppressing and pressure of the PCV below the design pressure. In the foregoing process, the noncondensable gas greatly lowers the heat transfer coefficient (HTC) inside the condenser tubes. Therefore the effect of noncondensable gases should be clarified to predict HTCs under such conditions. The objective of this study are to measure local HTCs inside a condenser tube and to develop their evaluation methods in the presence of noncondensable gas.
- OSTI ID:
- 76142
- Report Number(s):
- CONF-940602--
- Journal Information:
- Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 70; ISSN 0003-018X; ISSN TANSAO
- Country of Publication:
- United States
- Language:
- English
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