Kondenzace páry a možnosti systému akumulace tepla pro LOCA havárii v jaderných elektrárnách

POSSIBILITIES OF VAPOUR CONDENSATION AND HEAT ACCUMULATION SYSTEMS FOR LOCA ACCIDENTS IN NUCLEAR POWER PLANTS

journal article - other

en

The condensation process of vapour described in this article is generally studied and defined according to classical and experimental approaches. These general approaches have explored vapour condensation by different methods in very specific conditions and physical modifications. Mathematical formulations and practical conclusions from these approaches directly resulting in an applicable vapour condensation process have been theoretically examined for heat accumulation systems used in nuclear power plants. The heat accumulations systems are represented by ice condensers which are employed for vapour condensations during LOCA accidents. Generated vapour from the pressurized water in the primary circuit causes pressure increase in containment. The dangerous pressure peak is reduced by the vapour condensation on the ice layer. The disadvantageous features of the ice as a heat accumulating material can be solved by its replacing. The replacement is in view of materials providing the phase change within a specific temperature range close to the operating conditions of the nuclear power plant. The vapour condensation at the system filled by the replacing material is studied in different forms while accepting specific conditions of the given experimental system generally described. The experimental system offers the same possibility of the vapour condensation, however, the conditions impacting condensation effectiveness are mentioned and compared. The fundamental settings of the theoretically designed system are accordance to the conditions caused by the LOCA accident. The given comparison of the heat accumulation system providing the vapour condensation is mostly focused on the vapour steam direction, phase change temperature and heat transfer process

Publikace popisuje možnosti využití materiálů s přeměnou fáze (PCM) pro akumulaci tepla při havárii typu LOCA v jaderných elektrárnách. Popisuje rovněž experimentální smyčku a základní analytické metody řešení.

The condensation process of vapour described in this article is generally studied and defined according to classical and experimental approaches. These general approaches have explored vapour condensation by different methods in very specific conditions and physical modifications. Mathematical formulations and practical conclusions from these approaches directly resulting in an applicable vapour condensation process have been theoretically examined for heat accumulation systems used in nuclear power plants. The heat accumulations systems are represented by ice condensers which are employed for vapour condensations during LOCA accidents. Generated vapour from the pressurized water in the primary circuit causes pressure increase in containment. The dangerous pressure peak is reduced by the vapour condensation on the ice layer. The disadvantageous features of the ice as a heat accumulating material can be solved by its replacing. The replacement is in view of materials providing the phase change within a specific temperature range close to the operating conditions of the nuclear power plant. The vapour condensation at the system filled by the replacing material is studied in different forms while accepting specific conditions of the given experimental system generally described. The experimental system offers the same possibility of the vapour condensation, however, the conditions impacting condensation effectiveness are mentioned and compared. The fundamental settings of the theoretically designed system are accordance to the conditions caused by the LOCA accident. The given comparison of the heat accumulation system providing the vapour condensation is mostly focused on the vapour steam direction, phase change temperature and heat transfer process

Pára, kondenzace, jaderné elektrárny, havarie LOCA

Keywords: vapour, condensation process, nuclear power plants, LOCA accidents

2015

14.05.2015

FACULTY ENGINEERING HUNEDOARA

5, Revolutiei, 331128, HUNEDOARA, ROMANIA

1584-2665

12

2

81–84

249