Measured data acquisition method and differential worth acquisition method for reactor control rod

A technology for measuring data and control rods, which is applied in the field of zero-power physical experiment measurement of reactors, can solve the problems of complicated procedures and many controlled parameters, and achieves the effects of simplifying procedures, high precision and shortening measurement time.

Pending Publication Date: 2019-01-08
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

[0003] Aiming at the problems of cumbersome procedures and many parameters to be controlled in the measurement of the differential value of control rods in the prior art proposed above, the present invention provides a method for obtaining measurement data of reactor control rods and a method for obtaining differential value, using the data to obtain Compared with the prior art, the method not only simplifies the program, shortens the measurement time, but also improves the safety of the reactor operation; the differential value acquisition method is based on the above data acquisition method, and compared with the prior art, it not only simplifies the program, shortens the The measurement time is beneficial to the safety of the reactor operation, and at the same time, it can reduce the adverse factors in the measurement process and improve the measurement accuracy

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  • Measured data acquisition method and differential worth acquisition method for reactor control rod

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Embodiment 1

[0032] This embodiment provides a method for obtaining measurement data of reactor control rods. The method for obtaining measurement data is used to obtain raw data for obtaining the differential value of reactor control rods. Obtaining steps:

[0033] The step of the differential value calibration of the control rod is as follows: determine N measuring points on the control rod to be tested, and along the height direction of the control rod to be tested, the N measuring points are sequentially 1, 2...N, N measuring points Corresponding to N stick positions: 1 stick position, 2 stick positions...N stick positions, the stick height corresponding to each measuring point is: h 1 、h 2 ... hN ; The data acquisition steps are:

[0034] The control rod to be tested is lifted to the top, and the other control rods are adjusted to be critical, and the other control rods are adjusted to be: using other control rods to adjust the reactor to a critical state;

[0035] Using the pulsed...

Embodiment 2

[0041] This embodiment is further limited on the basis of Embodiment 1: as a specific solution for improving the measurement accuracy of neutrons in core leakage, it is set that: the neutron detector is a BF3 detector.

Embodiment 3

[0043] This embodiment is further limited on the basis of Embodiment 1: As a specific solution for calibrating the position of the measuring point, the position of any measuring point on the control rod to be tested corresponds to the predictive calculation value obtained by using the theoretical calculation method.

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Abstract

The invention discloses a measured data acquisition method and a differential worth acquisition method for a reactor control rod. In the data acquisition method, pulsed neutrons are injected into a reactor by gradually inserting a tested control rod downwards, data acquired by a neutron detector is analyzed, and a leakage neutron attenuation curve is obtained. In the differential worth acquisitionmethod, differential worth of the control rod is obtained on the basis of the leakage neutron attenuation curve, and differential worth measurement of the control rod in a subcritical state is realized. In the processes, frequent rod switching is not needed, operation is simple and safe, measurement time is shortened, efficiency is improved, the defect that time and labor are consumed by frequentrod switching in a critical state in traditional differential worth measurement of the control rod is overcome, adverse influence factors in the measurement process are avoided, nuclear system safetyis facilitated, and accuracy of measurement results can be improved.

Description

technical field [0001] The invention relates to the technical field of reactor zero-power physical experiment measurement, in particular to a method for obtaining measurement data of reactor control rods and a method for obtaining differential value. Background technique [0002] In zero-power physical experiment research, the measurement of control rod differential value is generally carried out by period method. During the measurement, the reactor is in a critical state and needs to be stabilized at a certain power level. The control rods to be tested are lifted step by step, and the surrounding control rods are compensated. At the same time, considering the requirements of the reactor cycle operation limit, the reactivity introduced each time is about 100 pcm, and a group of control rods with large equivalent reactivity usually need to measure dozens or even hundreds of points, and each measurement point is in the To stabilize the power and invert the rods under the crit...

Claims

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Application Information

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IPC IPC(8): G21C17/10
CPCG21C17/10Y02E30/30
Inventor 盘世标
Owner NUCLEAR POWER INSTITUTE OF CHINA
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