Portable reactivity meter for carrying out full measuring range automatic monitoring on reactor signal, and reactivity correction method

Abstract

The present invention provides a portable reactivity meter for carrying out full measuring range automatic monitoring on the reactor signal, and a reactivity correction method. According to the present invention, the reactor signal input portion supports USB data communication, is connected with a computer through USB, and can flexibly support online measurement and offline treatment on the reactivity; the portable reactivity meter is provided with a high-precision micro-current measurement unit, the neutron detector current value is read through an industrial-grade high-precision electrometer, the bus communication circuit is matched to form the micro-current measurement channel of the reactivity meter, and the current mature micro-current measurement technology is integrated into the reactivity meter so as to produce the intrinsic improvement effect on the precision and the stability of the reactivity meter; and with the system adopting the image value to recognize the non-intrusive read nuclear instrument display value, the disadvantages of the hardware intervention, time-saving and easy mistake during human reading in the previous nuclear instrument data acquiring way are overcome, and the nuclear instrument display value can be recognized as the data only requiring the camera so as to achieve the real-time collection and sharing of the important data.

Description

technical field [0001] The invention relates to a reactor monitoring technology, in particular to a reactivity meter and a reactivity correction method for real-time measurement of the degree to which a reactor deviates from a critical state. Background technique [0002] During the start-up experiment and power operation stage of the nuclear reactor, the critical state of the reactor needs to be monitored by the reactivity meter. Whether the reactor signal is collected comprehensively and whether the data processing is accurate directly determines the accuracy of the reactivity meter measurement. At the same time, whether the hardware architecture design is reasonable also directly affects the reaction. The reliability and practicality of the tester. [0003] The domestic and foreign reactivity instruments currently used in nuclear power plants can be divided into the following three structures: [0004] 1. The overall packaging structure of the computer main board, displa...

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Problems solved by technology

[0005] 2. Signal acquisition cabinet plus computer structure, there are special instruments for collecting pulse signals, voltage signals and current signals of nuclear reactors in the signal acquisition cabinet. and maintenance

[0006] 3. The structure of data processor, signal conditioner and portable industrial computer. In this structure, the data processor and signal conditioner are either packaged separately in a chassis, or packaged together with the portable industrial computer. Since the portable industrial computer itself is still the motherboard A computer with a computer structure cannot achieve the portability of a notebook computer. At the same time, the data processor and the signal conditioner change multiple times in the signal processing, which introduces large errors and instability.

The disadvantage of signal acquisition is that the interface is complex and must be compatible in advance, and there is a risk of interference to the original system, and it takes time and effort to wait for safety approval and wiring permission; the disadvantage of manual recording is that it wastes scientific research manpower, human errors are prone to occur, and dynamic changes in data cannot be completely recorded.

At the same time, information such as rod position, temperature and boron concentration, which are closely related to the state of the reactor, is collected in a common voltage method, and multiple conversions of the signal will bring large errors. When it is used for new functions such as dynamic rod marking, it cannot meet the requirements.

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