Digital out-of-pile nuclear measurement system based on PC/104 bus

Abstract

The invention discloses a digital out-of-pile nuclear measurement system based on a PC / 104 bus. The digital out-of-pile nuclear measurement system comprises a neutron detector, a front-end signal conditioning and amplifying unit and a signal digital processing unit, wherein the signal digital processing unit comprises a host processing unit, a data acquisition unit and a data output unit which are connected through the PC / 104 bus. Compared with the prior art, the digital out-of-pile nuclear measurement system based on the PC / 104 bus utilizes the PC / 104 bus as a safety software platform, facilitates adjusting of the control scheme and realization of various novel control strategies, reduces the number of components, and simplifies the hardware structure, thereby improving the reliability and meeting the requirement for nuclear safety digitization of ex-core nuclear instrumentation systems in large-scale nuclear power stations.

Description

technical field [0001] The invention relates to the technical field of PWR external core detection, in particular to a digital reactor external core measurement system based on PC / 104 bus. Background technique [0002] The nuclear measurement system outside the reactor is one of the important systems directly related to the safety of the reactor. It uses a signal processor and a series of neutron detectors distributed outside the reactor pressure vessel to continuously monitor the reactor power, power change rate and power axis. distributed. However, from start-up to full-power operation of the reactor, the dynamic variation range of its nuclear power reaches 11 orders of magnitude, specifically, from the rated power of 10 －9 % ~ 200%, it is difficult to use a detector and circuit to cover such a wide range. Therefore, the conventional nuclear measurement system uses 8 independent measurement channels of three different ranges to measure the reactor power: namely, 2 source...

AI Technical Summary

Problems solved by technology

However, because of the existence of resistance-capacitance components, the inherent defects of analog control circuits, such as the accuracy and consistency of component parameters, and component aging, still exist.

In addition, analog integrated control chips also have problems such as high power consumption, low integration, inflexible control, low communication capabilities, and poor versatility.

[0004] To sum up, under the current trend of digitalization of nuclear power plants, the nuclear measurement system outside the reactor reactor based on analog technology can no longer meet the needs of digital nuclear power plants, and its system interface and operation concept have been seriously outdated.

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