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Report No.
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A improvement of JOYO simulator plant dynamic model

not registered; not registered; Iwashita, Tsuyoshi*

JOYO Simulator(FOSTER) has been operated for operational training. Also. it is necessary to utilize FOSTER for characteristics evaluation of various special operation. So, we studied to improve the reactor core model, main intermediate heat exchanger(IHX) model and main dump heat exchanger(DHX) model which were main plant dynamic model of FOSTER by multi-node and multi-channel modeling and evaluated the simulation ability. We evaluated the simulation ability of the JOYO natural circulation test(100MW transient test). In case of the short time simulation(300 seconds), the highest temperature of the core fuels in No.0 row was higher 14$$^{circ}$$C than the experimental data. In case of the long time simulation(1 hour), the simulation result corresponds to the experimental data. In relation to the other fuel outlet temperature, especially No.5 row fuel outlet temperature fitted the experimental data. So, we confirmed the modified plant dynamic model was good for plant simulator.

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