| 摘要 |
PROBLEM TO BE SOLVED: To provide a design of an improved condensing chamber that reduces the possibility of discharge of a non-condensable gas from a solution in a reference passage and thus supplies liquid level read values of more reliability using a differential pressure measuring system. SOLUTION: The present device includes the condensation chamber (CC) for maintaining a certain quantity of condensate obtained from vapor generated from a vessel such as a reactor pressure vessel (RPV). The condensation chamber is coupled to a reference leg (RL), a variable leg (VL), and vapor or steam leg (SL). The RL coupling section becomes a flow channel where compensated matter of a CRD drive water system flows into the CC and overflows into the VL. Excessive compensated matter and/or condensate is typically returned to the vessel at a part under the liquid level inside the vessel. Thus, the non-condensed gas is substantially returned from the CC to the RPV in a continuous form, and a trend of preventing a liquid containing much non-condensable gas from being introduced from the CC to the RL is then provided. Also, the tolerance and reliability of liquid level measurement are improved, and/or the thermal stress to various CC coupling sections is reduced. COPYRIGHT: (C)2007,JPO&INPIT
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