WebFeb 24, 2024 · Due to large uncertainty, the effectiveness of in-vessel retention (IVR) with external reactor vessel cooling (ERVC) for high-power reactors cannot be fully demonstrated during the transient process. To optimize the current IVR-ERVC strategy, the concept of IVR-ERVC with in-vessel injection (IVI) is studied. Two feasible IVI designs are … WebAug 1, 2024 · Abstract. Flow channel configuration has been considered as one of the key factors that affect the ability of IVR-ERVC. In this paper, a series of sensitivity tests have …
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WebThe efficacy of in-vessel through external reactor vessel cooling (IVR-ERVC) is strongly correlated with the critical heat flux (CHF) on the lower head of reactor pressure vessel (RPV). The high limit of CHF prevents the RPV from failure by extracting much heat out of the vessel through the circulation of working fluid in external flow channel. In present … WebFig. 5. Time variation of ERVC channel flows. Steam venting to the containment is compared with cavity inlet flow in Figure 6. Boiling of ERVC channel produces 1 kg/sec of steam flow rate. Cavity inlet flow rate is little smaller than steam outlet flow rate. Fig. 6. Comparison of inlet and outlet flows in the ERVC channel. hakutainomori
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WebFeb 7, 2014 · ERVC is widely adopted as a part of in-vessel retention (IVR) in severe accident management strategies. In this paper, two-phase flow instability in natural circulation loops of external reactor vessel cooling (ERVC) system in a large size power PWR (CAP 1700 with a thermal power 5000 MWt) is simulated and evaluated by the … WebOct 25, 2016 · In-Vessel Retention by External Reactor Vessel Cooling (IVR-ERVC) is method of removing the decay heat by cooling reactor vessel after corium relocation, and is also one of severe accident management strategies. Estimating heat transfer coefficients (HTCs) is important to evaluate heat transfer capability of the ERVC. In this study, the … WebThe two-phase flow distribution in the external reactor vessel cooling flow channel shows a significant local feature because of its particular flow structure. In this paper, a slice geometry test section and a 1 : 1 height scaling experimental apparatus is used to pistola pt 917 9 mm