Plate-fuel-element power calibration method for fuel consumption measurement

A fuel element and calibration method technology, applied in the field of research reactor fuel irradiation, can solve the problems of difficult-to-test fuel element nuclear power and high share

Active Publication Date: 2018-01-19
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the heat release of each structural material in the test section accounts for a relatively high share of the total heat release in the test section during the irradiation test of the existing plate-type fuel element, and it is difficult to determine the nuclear power of the test fuel element by using a simple heat balance method , so that the burnup of fuel elements cannot be obtained by accumulating the nuclear power of fuel elements, the purpose is to provide a power calibration method for plate-type fuel elements for burnup measurement

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  • Plate-fuel-element power calibration method for fuel consumption measurement
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  • Plate-fuel-element power calibration method for fuel consumption measurement

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Embodiment

[0051] Such as figure 2 As shown, the hardware part of the plate-type fuel element irradiation test device involved in the present invention includes a device section 12 for connecting the research reactor pressure vessel shell and an external measurement system, etc., and is used for accommodating test fuel elements and connecting the device section 12 The test section 11 and the grid plate in the stack, and the device section 12 have the function of regulating the flow of coolant. The device section 12 is mainly composed of a bracket assembly, a flange assembly, a support pipe assembly, a water inlet pipe assembly, a flow adjustment assembly, and a thermocouple. The device segment 12 is also connected with the sealing mechanism of the core pressure vessel, the coolant inlet mechanism, the driving mechanism of the coolant flow regulating device, and the coolant flow regulating device.

[0052] image 3 The mid-test section mainly consists of a combination plate composed of ...

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Abstract

The invention discloses a plate-fuel-element power calibration method for fuel consumption measurement. The flow quantity of different coolants passing through an irradiation test device is calculatedfor obtaining flow distribution coefficients of inner and outer flow channels of a test section; the nuclear power of a plate fuel element and the total heat release power of the test section are utilized for obtaining initial values of the nuclear power of fuel element cores and the gamma heat release rate of each structural material, and the heat source and the distribution in the test sectionare preliminarily determined; a geometric structure model is utilized for building a calculation model; the gamma heat release rate of the material is determined through iterative calculation; the nuclear power of the fuel element is determined; and the fuel consumption of the fuel element is determined. The method is used for determining real-time fuel consumption values of the test fuel element,so that the fuel consumption irradiation index of the fuel element can be realized. The influence of the gamma release heat of the structural material is stripped through a certain analysis mean andmethod, and the error of the fuel nuclear power is reduced when fuel consumption in a fuel irradiation test is measured by a thermal balance method, so that the calibration of the fuel nuclear power in the irradiation test process of the fuel consumption measurement is realized.

Description

technical field [0001] The invention relates to the technical field of research reactor fuel irradiation, in particular to a method for calibrating the power of a plate-type fuel element for burnup measurement. Background technique [0002] The performance of fuel elements is directly related to the safety and economics of research reactors. Carrying out in-pile irradiation tests of fuel elements is a key part of the research and development and design of fuel elements. Fuel elements must be tested by in-core irradiation, and the changes in various properties of fuel elements under irradiation conditions are studied to verify whether their comprehensive performance meets the requirements of use under different thermal and hydraulic conditions and different burnups. [0003] In high-throughput research reactors, special radiation test devices are generally used to conduct radiation test research on fuel elements. According to the classification of the irradiation method, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/108
CPCY02E30/30
Inventor 张亮杨文华童明炎斯俊平胡晓晖聂良兵
Owner NUCLEAR POWER INSTITUTE OF CHINA
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