A Correction Method of Isothermal Temperature Coefficient Measured Value in Zero Power Physical Experiment
A technology of temperature coefficient and measurement value, which is applied in the field of temperature coefficient measurement value control rod rod position-critical boron concentration correction field, can solve the problems of inconsistency in core operation and large error, achieve simplification of correction method and reduction of correction error Effect
Active Publication Date: 2019-04-16
CNNC FUJIAN FUQING NUCLEAR POWER
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The traditional correction method is the result of two-dimensional nuclear design calculation, and the simple linear interpolation calculation of the control rod position and critical boron concentration is inconsistent with the actual operation of the core, especially the effect of control rod insertion on the isothermal temperature coefficient is actually is non-linear, so the error introduced by this correction is very large
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[0025] The technical solutions of the present invention will be further described in detail below with reference to the drawings and specific embodiments.
[0026] Taking the measurement test of a cycle zero-power ARO isothermal temperature coefficient of a unit in a certain power plant as an example, the technical solution of the present invention includes the following steps:
[0027] Step 1: Use a three-dimensional program to calculate the comprehensive correction amount of the control rod position-critical boron concentration to the isothermal temperature coefficient.
[0028] Since the change of control rod position and boron concentration has a great influence on the curvature of the core, the influence of the change of the curvature of the core on the comprehensive correction can be avoided by using three-dimensional calculation.
[0029] As shown in Table 1, the critical boron concentration and the calculated isothermal temperature coefficient (Isothermal temperature c...
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The invention belongs to the technical field of nuclear reactor physics, and particularly relates to a method for correcting a control rod position-critical boron concentration of a measurement value of a zero-power physical test isothermal temperature coefficient. By adopting the method, the correction error in the measurement of the isothermal temperature coefficient is effectively reduced. A three-dimensional calculation model adopted in the method is closer to an operation state of a reactor core, and the influence of a rod position-boron concentration is considered while various reactor core state parameters are calculated, so that the correction error in the measurement of the isothermal temperature coefficient is greatly reduced.
Description
technical field [0001] The invention belongs to the technical field of nuclear reactor physics, and in particular relates to a zero-power physical test isothermal temperature coefficient measurement value control rod position-critical boron concentration correction method, which can effectively reduce the correction error in the isothermal temperature coefficient measurement. Background technique [0002] The pressurized water reactor nuclear power plant requires that when the reactor operates at various power levels, the temperature coefficient of the moderator must be negative or zero, so that the reactor has a negative feedback characteristic. During the zero-power physical test, the temperature coefficient of the moderator is required to be measured and verified. However, due to the difficulty in measurement, the temperature coefficient of the moderator is not directly measured, but indirectly obtained by measuring the isothermal temperature coefficient. The isothermal t...
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IPC IPC(8): G21C17/10G21C17/112
CPCG21C17/10G21C17/112Y02E30/30
Inventor 蔡光明刘国明高鑫何子帅郑东佳程宏亚胡娟
Owner CNNC FUJIAN FUQING NUCLEAR POWER