TED-AJ03-105 SYSTEM EXPERIMENTS MODELLING SAFETY ASPECTS OF NUCLEAR POWER PLANTS OF VVER-440/213 TYPES
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概要
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The Paks Nuclear Power Plant is equipped with pressurized water reactors of VVER-440/213-type. These plants have design solutions different from the usual PWRs. To study the transient behaviour of these plants the PMK-2 integral-type facility was designed and constructed in the middle of 1980s. Report gives an overview of the research activity performed primarily in international framework with the participation of several experts from European and overseas countries. Paper shortly presents the specific design solutions of VVER-440/213 plants and gives the modelling aspects, similarity considerations and system description of the PMK-2,which is the full pressure scaled-down modell of the primary and partly the secondary circuit of the Paks Nuclear Power Plant. Since the start-up of the facility in 1985 altogether 48 experiments have been performed. In the time interval of 1987 to 1995 experimental results were provided to four Standard Problem Exercises of the International Atomic Energy Agency. Since 1996,several experiments have been performed in projects financed by the European Union to validate codes like the German ATHLET, the French CATHARE and the RELAP5 of the US. A series of experiments have been performed in national framework to provide experimental support to the assessment of symptom based emergency operating procedures of Westinghouse-type. Paper gives a selection of the results of experiments to study the VVER-specific problems as follows : disturbances of natural circulation in shutdown conditions when the heat is removed by natural circulation with two loops; the thermohydraulic consequences of the loop seal in the hot leg of the primary circuit; the pressuriser thermohydraulics; experiments to assess the effectiveness of primary and secondary bleed and feed with the evaluation of the VVER system response to these accident management measures. Paper presents short notes on the computer code validation for VVERs based on PMK-2 experiments and finally offers conclusions.
- 一般社団法人日本機械学会の論文