Low-voltage power supply for out-of-reactor nuclear instrument system simulation component and application method thereof

Abstract

The invention discloses a low-voltage power supply for an out-of-reactor nuclear instrument system simulation component and an application method of the low-voltage power supply, relates to the fieldof on-line nuclear instrument and on-line reactor nuclear data measurement of reactors, and solves the problem that the influence of a high-frequency component of a switching power supply on the performance of a conditioning part cannot be eliminated. The low-voltage power supply comprises a low-voltage power supply body supplying power to three channels of an out-of-reactor nuclear instrument system, wherein a rectifier transformer is used for converting alternating-current voltage into four paths of independent direct-current voltage, and a voltage stabilizing circuit independently performslow ripple output processing on the four paths of independent direct-current voltage respectively, so that low ripple output of the direct-current voltage is that VP-P<=10 mV and VR-MS<=2 mV. The low-voltage power supply can eliminate the influence of the high-frequency component of an existing low-voltage power supply on the operation of the nuclear instrument system simulation component, improves the efficiency of the low-voltage power supply, reduces the heating of the low-voltage power supply, and improves the performance of the out-of-reactor nuclear instrument system.

Description

technical field [0001] The invention relates to the fields of reactor online nuclear instrumentation and online reactor nuclear data measurement, in particular to a low-voltage power supply for analog components of an external nuclear instrumentation system and an application method thereof. Background technique [0002] The reactor nuclear instrumentation system of a nuclear power plant measures the neutron fluence rate of core leakage through a series of neutron detectors installed outside the reactor pressure vessel, and the pulse / current signals measured by the detectors are sent to the system protection cabinet for conditioning and processing , realize continuous monitoring of reactor power level, power change and power distribution, provide operators with reactor status information during reactor shutdown, start-up and power operation, and during high neutron fluence rate and neutron fluence rate An initial signal for shutting down is sent to the reactor protection sys...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: it is impossible to eliminate the influence of the high-frequency component of the switching power supply on the performance of the conditioning part of the nuclear instrumentation system, because the conditioning part of the nuclear measuring instrument performs the measurement of weak signals, so the low-voltage power supply for its power supply has low ripple Wave performance is very important, which is the most critical part of the present invention different from other low-voltage power supplies;

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