1,721,337 research outputs found
Multi-Dimensional Multicomponent Mixture Air-Ingress Analysis and Air-Ingress Experiment in an HTGR
No full textKOREAN DEVELOPMENT OF ADVANCED THERMAL-HYDRAULIC CODES FOR WATER REACTORS AND HTGRS: SPACE AND GAMMA
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매우 작은 규모의 냉각재 상실 사고 동안 잔열 제거와 운전자의 개입
No full textSample calculations were done for KORI-1 to develop a better understanding of what happens after very small LOCA (≤0.05 ft²). For s water-side break with the break size larger than 0.006 ft², fluid-loss through break exceeds the makeup. If the break size is larger than 0.008ft², decay heat can be completely removed through break. Based on these results, it was concluded that KORI-1 is fairly safe for the whole spectrum of sizes in very small LOCA. However, for the reactor with 900 MWe or 1200 MWe, a certain spectrum of sizes in very small LOCA should be carefully considered. In the accident sequence the transition from natural circulation to pool boiling or from pool boiling to natural circulation may be troublesome to the operator or in the safety analysis. Operators intervention was discussed; primary pump shutoff, HPI pump shutoff, break isolation, and opening relief valve. It was proved that continuous operation of HPI pumps after shutdown will not threaten the integrity of the primary system
A zero-dimensional model for dryout heat flux of debris bed considering interfacial friction between two phases
No full textScaling and parametric studies of condensation oscillation in an in-containment refueling water storage tank
No full textThe purpose of this paper is to study the condensation oscillation phenomena by steam-jetting into subcooled water through a multihole sparger, implementing a scaling methodology and the similarity correlation between the test facility and model prototype. To corroborate the scaling methodology, various experimental tests were conducted The thickness of the boundary layer that encloses the steam cavity was found to be equal to the maximum length of the steam cavity formed Three key scaling parameters were identified and correlated with the maximum amplitude of pressure oscillation: flow restriction coefficient, area ratio of discharge hole to steam cavity, and density ratio of water to steam. Variations of the oscillation amplitude were small when steam-jetting directions were altered The concept of a reduction factor was introduced for estimating the oscillation amplitude of the multihole sparger with test data from a single-hole sparger. The results of this study can provide suitable guidelines for sparger design utilized in the in-containment refueling water storage tank for the Advanced Power Reactor 1400
CONCEPTUAL DESIGN AND FEASIBILITY STUDY FOR FAIL-SAFE SIMPLE ECONOMICAL SMR (FASES) SYSTEM
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