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A Calculation Method of Nuclear Power Plant Burnup Based on Single Precision Floating Point Data

A floating-point data and calculation method technology, applied in calculation, data processing applications, instruments, etc., can solve problems that cannot meet engineering applications, cannot achieve accurate real-time tracking and calculation of fuel consumption, and achieve the effect of meeting engineering application requirements

Active Publication Date: 2022-06-28
CNNC FUJIAN FUQING NUCLEAR POWER
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Problems solved by technology

[0003] At present, the DCS of domestic nuclear power plants provides the calculation function of single-precision floating point type. When using this function to calculate the fuel consumption, if the truncation error is not considered, the calculation error of the fuel consumption can reach 30% within one fuel cycle, which cannot meet the requirements. For engineering applications, accurate real-time tracking and calculation of fuel consumption cannot be realized

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  • A Calculation Method of Nuclear Power Plant Burnup Based on Single Precision Floating Point Data
  • A Calculation Method of Nuclear Power Plant Burnup Based on Single Precision Floating Point Data
  • A Calculation Method of Nuclear Power Plant Burnup Based on Single Precision Floating Point Data

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Embodiment Construction

[0034] A burnup calculation method based on single-precision floating point, comprising the following steps:

[0035] S1: Use equivalent full power days, unit EFPD, or energy emitted by unit mass of uranium, unit MWd / tU, to characterize burnup, the calculation formula of nuclear power plant burnup is:

[0036]

[0037] Among them, Bu is the fuel consumption of this fuel cycle, and the unit is EFPD;

[0038] t 1 The start time of the fuel cycle burnup statistics;

[0039] t 2 The cut-off time for this fuel cycle burnup statistics;

[0040] P is the relative power of the reactor at a certain time.

[0041] Converting the dt in the integral form of formula (1) into the calculation period T, the fuel consumption calculation formula can be obtained as:

[0042]

[0043] Among them, Bu t The fuel consumption value calculated for this calculation cycle, the unit is EFPD;

[0044] P t The average value of the reactor power in this calculation period, expressed as %FP, FP...

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Abstract

A nuclear power plant burnup calculation method based on single-precision floating-point data, which can perform online real-time tracking and calculation of burnup. Including the following steps S1: Calculating the fuel consumption of the nuclear power plant; S2: Continue to simplify to obtain the following formula: S3: According to the formula (2), perform real-time tracking calculation of the fuel consumption, the formula is: the calculation period adopts T=120s, after Fuqing Nuclear Power Plant 1 ‑ In the verification of 10 fuel cycles of Unit 4, the error between the fuel consumption calculated by the online fuel consumption and the actual fuel consumption of the unit is less than 1EFPD. At the end of the service life, the relative error of the online fuel consumption calculation is less than 0.5%, which meets the engineering application requirements.

Description

technical field [0001] The invention relates to the field of nuclear power plant core supervision, in particular to a nuclear power plant fuel consumption calculation method based on single-precision floating point data. Background technique [0002] The burnup calculation must be carried out in the physical design of the reactor. The moderator temperature coefficient, power distribution, critical boron concentration, boron differential value, control rod position insertion limit, and shutdown margin during the reactor operation are all related to burnup. have a close relationship. Therefore, the accurate calculation of burnup is of great significance to the nuclear design and safe and economical operation of nuclear power plants. [0003] At present, the DCS of domestic nuclear power plants provides a single-precision floating-point calculation function. When using this function for fuel consumption calculation, if the truncation error is not considered, the fuel consumpti...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 孟凡锋蔡光明李振振郑东佳耿飞肖冰山杨浩陈伟
Owner CNNC FUJIAN FUQING NUCLEAR POWER