Probabilistic Fracture Mechanics Analysis of the Pressure-Tempera-ture Curve of the Core Beltline
The pressure-temperature curve of the reactor pressure vessel is the limit boundary for the normal operation of nuclear power plant,ensuring the safe operation of nuclear energy equipment.Now,the standard provides the method for calculating the pressure-temperature curve,but results obtained by this method have high conservatism.From the perspective of probabilistic fracture mechanics,and used the high irradiation zone of core beltline as the calculation case to study the pressure-temperature curve of the core beltline of pressure vessel.The study results indicate that the risk of the reactor heat-up and the hydro test process of nuclear power plant is very low,and attention should be paid to the cooling rate during the reactor cool-down.The new safety coefficients have been proposed based on the results of the probability analysis for the reactor heat-up,reactor cool-down,and hydro test.
probabilistic fracture mechanicspressure-temperature curvenuclear power plantbeltline
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