A simulation method for the characteristics of nuclear reactor gravity passive safety injection equipment
A technology for the characteristics of nuclear reactors and equipment, applied in the field of nuclear reactors, can solve problems such as leakage of radioactive substances, burning of fuel element cladding, etc., and achieve the effect of accurate cooling capacity
Active Publication Date: 2022-07-29
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology
As the primary circuit coolant continues to be sprayed from the breach, the liquid level in the reactor core continues to drop. After the core is exposed, the decay heat power of the fuel element may burn the fuel element cladding, resulting in the leakage of radioactive substances.
Method used
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Embodiment 1
[0041] like figure 1 As shown, the test device of the present invention mainly includes a reactor pressure vessel simulation body, a passive safety injection equipment simulation body, a valve, a flow meter and a loop pipeline. Determine the area reduction factor of all equipment and pipelines of the test device as λ, and then obtain the flow channel area of all equipment and pipelines of the test device.
[0042] A method for simulating the characteristics of a gravity-type passive safety injection device for a nuclear reactor, comprising the following steps:
[0043] 1), get the simulation criterion number:
[0044] a1), according to the mass conservation equation and the energy conservation equation, the formula describing the safety injection process is obtained:
[0045]
[0046] In the formula, A E is the cross-sectional area of the outlet of the safety injection pipeline, A T is the flow cross-sectional area of the safety injection equipment, Π TE is the f...
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The invention discloses a method for simulating the characteristics of a gravity-type passive kinetic safety injection device of a nuclear reactor, comprising the following steps: 1) obtaining a simulation criterion number: establishing a mass and momentum conservation equation for a gravity-driven safety injection, and reasonably simplifying the equation After the sum dimensionless, the number of simulation criteria for simulating the characteristics of the prototype passive safety injection equipment is obtained; 2), ensure that the number of simulation criteria of the test device and the prototype device are the same, and obtain the simulation ratio of the main parameters of the test device; 3), after satisfying the pressure vessel, On the premise that the passive safety injection equipment and safety injection pipeline are scaled down, the test device and parameter control are set up according to the requirements of simulation scale and contour simulation. The invention can simulate in real time and accurately the safety injection characteristics of the gravity passive safety injection equipment and the cooling capacity of the core after a water loss accident occurs in a nuclear reactor with a small-scale experimental scale ratio.
Description
technical field [0001] The invention relates to the field of nuclear reactors, in particular to a method for simulating the characteristics of gravity-type passive dynamic safety injection equipment of nuclear reactors. Background technique [0002] When a water loss accident occurs in the nuclear reactor, the pressure of the primary circuit drops sharply, and then the control rods are dropped to implement an emergency core, and the main pump stops running after a brief idle run. As the primary circuit coolant is continuously sprayed from the breach, the liquid level in the reactor core continues to drop. After the core is exposed, the decay heat power of the fuel element may burn the fuel element cladding, resulting in the leakage of radioactive materials. Therefore, when a water loss accident occurs in the reactor, injecting coolant into the reactor pressure vessel to effectively cool the core is an important measure to prevent the leakage of radioactive materials in the n...
Claims
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IPC IPC(8): G06F30/20G06F17/11
CPCG06F17/11
Inventor 彭传新昝元锋白雪松张妍卓文彬闫晓
Owner NUCLEAR POWER INSTITUTE OF CHINA