CN-121983357-A - Control rod overlapping step rod position adjusting method, device, equipment and storage medium

CN121983357ACN 121983357 ACN121983357 ACN 121983357ACN-121983357-A

Abstract

The application discloses a control rod overlapped step rod position adjusting method, a device, equipment and a storage medium, relates to the technical field of nuclear reactor control rods, can adapt to the overlapped step rod position adjusting requirements of various reactor types in the controlled insertion or controlled extraction process of the control rods, can improve the flexibility of the overlapped step rod position calculating process, and effectively meets the accurate calculating requirements in different reactor core states. The method comprises the steps of obtaining real-time rod position information of a control rod group and an effective multiplication coefficient of the whole reactor core in the overlapping step rod position adjusting process, determining motion state information of the control rod group according to the effective multiplication coefficient, calculating rod position adjusting information of each control rod in the control rod group in a corresponding motion state under the constraint of preset conditions according to the motion state information and the real-time rod position information, and executing rod position adjustment on each control rod in the control rod group according to the rod position adjusting information in each time step.

Inventors

LI ZHIGANG
LU ZONGJIAN
HUANG DAISHUN
GUO FENGCHEN
YU YANG
ZHANG YAOYI
QIN ZHIHONG
LI XIANGYU
PAN JUNJIE
LU WEI
CAO RUI
XIN SUFANG
CUI HUAIMING
ZHANG MING

Assignees

中国核动力研究设计院

Dates

Publication Date: 20260505
Application Date: 20251215

Claims (10)

1. A control rod overlap walking rod position adjustment method, comprising: acquiring real-time rod position information of a control rod group in the overlapping step rod position adjusting process and an effective proliferation coefficient of the whole reactor core; determining the motion state information of the control rod group according to the effective proliferation coefficient; According to the motion state information and the real-time rod position information, rod position adjustment information of each control rod in the control rod group in a corresponding motion state is calculated under the constraint of preset conditions, wherein the preset conditions comprise at least one condition for constraining the control rods in the overlapping step rod position adjustment process; and executing rod position adjustment on each control rod in the control rod group according to the rod position adjustment information in each time step.
2. The method according to claim 1, characterized in that said determining the movement state information of the control rod group according to said effective proliferation factor, in particular comprises: When the effective proliferation coefficient is lower than a subcritical threshold value, determining that the motion state information of the control rod group is controlled lifting; When the effective proliferation coefficient exceeds a supercritical threshold, determining that the motion state information of the control rod group is controlled downward insertion; And when the effective multiplication coefficient is in a critical interval, determining the motion state information of the control rod group as the control rod to keep the current position unchanged.
3. The method according to claim 1, wherein calculating the rod position adjustment information of each control rod in the control rod group in the corresponding motion state according to the motion state information and the real-time rod position information under the constraint of the preset condition specifically comprises: Determining an initial control rod used for overlapping step adjustment in a control rod group and rod position information of the initial control rod according to the motion state information and the real-time rod position information; According to the rod position information of the initial control rod, calculating rod position adjustment information of the initial control rod in a corresponding motion state under the constraint of preset conditions; Based on the rod position adjusting information of the initial control rod in the corresponding motion state, calculating the rod position adjusting information of other control rods in the control rod group in the corresponding motion state under the constraint of preset conditions.
4. A method according to claim 3, wherein determining a starting control stick for overlapping step adjustment in a control stick group and stick position information of the starting control stick according to the motion state information and the real-time stick position information specifically comprises: On the premise of the motion state information, determining the setting sequence of each control rod in the control rod group in different motion directions; According to the real-time bar position information, sequentially acquiring the adjustment allowance of the control bars in the control bar group in the corresponding movement direction according to the set sequence; and taking the first control rod with the adjustment allowance in the control rod group as the control rod for overlapping step adjustment, and determining the initial control rod and the rod position information of the initial control rod.
5. A method according to claim 3, wherein the preset condition includes an adjustment amount condition of the constraint control rod, the adjustment amount condition records a set adjustment amount of the overlapping step of the constraint control rod, and the calculating the rod position adjustment information of the start control rod in the corresponding motion state according to the rod position information of the start control rod under the constraint of the preset condition specifically includes: Under the constraint of the adjustment quantity condition, adding and calculating the rod position information of the initial control rod and the set adjustment quantity of the control rod overlapping step to obtain the rod position adjustment information of the initial control rod in a corresponding motion state; Correspondingly, based on the rod position adjustment information of the initial control rod in the corresponding motion state, under the constraint of a preset condition, calculating the rod position adjustment information of other control rods in the control rod group in the corresponding motion state, wherein the rod position adjustment information specifically comprises: Based on the rod position adjusting information of the initial control rod in the corresponding motion state, performing position comparison on the rod position adjusting information and the constraint of preset conditions to obtain a position comparison result; And calculating rod position adjusting information of other control rods in the control rod group in corresponding motion states according to the position comparison result.
6. The method of claim 5, wherein the preset conditions include a down-going condition of a constraint control rod, the down-going condition records a first down-going position where the constraint control rod normally operates and a second down-going position where the constraint control rod is fully inserted into a reactor core, and when the motion state information of the initial control rod is a controlled down-insertion, the calculating rod position adjustment information of other control rods in the control rod group in corresponding motion states according to the position comparison result specifically includes: When the rod position adjusting information is controlled to be inserted into the first descending position, the initial control rod and the rear control rod of the initial control rod are controlled to be inserted synchronously until the rod position adjusting information of the initial control rod exceeds the second stroke position, and the rod position adjusting information of the rear control rod of the initial control rod in the control rod group in the controlled insertion process is calculated on the basis of the adjusting quantity condition of the constraint control rod; When the rod position adjusting information is controlled to be inserted into the second descending position, determining that the motion state information of the initial control rod is completely inserted into the reactor core, taking the rear control rod of the initial control rod as the initial control rod according to a set sequence, and calculating the rod position adjusting information of the rear control rod of the initial control rod in the control rod group in the controlled insertion process under the constraint of set conditions.
7. The method of claim 5, wherein the preset condition includes an uplink condition of a constraint control rod, the uplink condition records a first uplink position of the constraint control rod in normal operation and a second uplink position of the constraint control rod in which the constraint control rod fully proposes a reactor core, and when the motion state information of the initial control rod is a controlled uplink, the calculating the rod position adjustment information of other control rods in the control rod group in corresponding motion states according to the position comparison result specifically includes: when the rod position adjusting information is controlled to be lifted to the first ascending position, the starting control rod and the rear control rod of the starting control rod are controlled to be lifted synchronously until the starting control rod is lifted to the core, and the rod position adjusting information of the rear control rod of the starting control rod in the control rod group in the controlled lifting process is calculated on the basis of the adjusting quantity constraint condition of the restraining control rod; When the rod position adjusting information is controlled to be lifted to the second ascending position, determining that the movement state information of the initial control rod is completely lifted to the reactor core, taking the rear control rod of the initial control rod as the initial control rod according to a set sequence, and calculating the rod position adjusting information of the rear control rod of the initial control rod in the control rod group in the controlled lifting process under the constraint of set conditions.
8. A control rod overlap walking rod position adjusting device, comprising: the acquisition unit is used for acquiring real-time rod position information of the control rod group in the overlapping step rod position adjustment process and an effective proliferation coefficient of the whole reactor core; A determining unit for determining motion state information of the control rod group according to the effective proliferation coefficient; The calculation unit is used for calculating rod position adjustment information of each control rod in the control rod group in a corresponding motion state under the constraint of preset conditions according to the motion state information and the real-time rod position information, wherein the preset conditions comprise at least one condition for constraining the control rods in the overlapping step rod position adjustment process; And the adjusting unit is used for executing rod position adjustment on each control rod in the control rod group according to the rod position adjustment information in each time step.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 7 when the computer program is executed.
10. A computer storage medium having stored thereon a computer program, which when executed by a processor realizes the steps of the method according to any of claims 1 to 7.

Description

Control rod overlapping step rod position adjusting method, device, equipment and storage medium Technical Field The application relates to the technical field of nuclear reactor control rods, in particular to a control rod overlapping step rod position adjusting method, a device, equipment and a storage medium. Background In the operation process of the reactor, the control rods are dynamically adjusted according to the neutron increment rate of the reactor core and the power state, wherein when the reactor core is in a supercritical state, the control rods are controlled to be inserted to introduce negative reactivity, and when the reactor core is in a subcritical state, the control rods are controlled to be extracted to introduce positive reactivity. The control rod overlapping step adjustment is a key control mode in the reactor load tracking process, and the smooth adjustment of the reactivity is realized through the alternate actions of a plurality of groups of control rods according to a preset sequence and intervals, namely, the control rod overlapping step rod position adjustment depends on standard quantization parameters of a plurality of groups of control rods, the standard quantization parameters are required to be determined through overlapping step rod position calculation, and the standard quantization parameters are dynamically corrected by combining working conditions in the reactor core operation process, so that a quantization basis is provided for the accurate execution of the control rod overlapping step adjustment. In the related art, the method for calculating the overlapped step bar position comprises a simplified model method and a pseudo total bar position replacement algorithm. The simplified model method generally adopts a simplified mathematical model/empirical formula, and cannot adapt to calculation of the overlapped step rod positions of the control rods in different reactor core states, the pseudo total rod position replacement algorithm generally firstly converts the actual list of each group of control rods into pseudo total rod positions in a unified mode, and then calculates the overlapped step parameters based on the pseudo total rod positions, and the process needs to additionally depend on preset conversion parameters, so that the calculation complexity is increased, and the actual engineering application is inconvenient. In addition, the two methods all need to assume that all the overlapped step parameters are consistent, so that the overlapped step rod position calculation process lacks flexibility and cannot meet the accurate calculation requirements under different reactor core states. Disclosure of Invention In view of this, the application provides a control rod overlapped step rod position adjusting method, a device, equipment and a storage medium, and mainly aims to solve the problem that in the prior art, the overlapped step rod position calculating method needs to assume that all overlapped step parameters are consistent, so that the overlapped step rod position calculating process lacks flexibility, and cannot meet the accurate calculating requirements under different reactor core states. According to a first aspect of the present application, there is provided a control rod overlap walking rod position adjustment method, the method comprising: acquiring real-time rod position information of a control rod group in the overlapping step rod position adjusting process and an effective proliferation coefficient of the whole reactor core; determining the motion state information of the control rod group according to the effective proliferation coefficient; According to the motion state information and the real-time rod position information, rod position adjustment information of each control rod in the control rod group in a corresponding motion state is calculated under the constraint of preset conditions, wherein the preset conditions comprise at least one condition for constraining the control rods in the overlapping step rod position adjustment process; and executing rod position adjustment on each control rod in the control rod group according to the rod position adjustment information in each time step. Further, the determining the motion state information of the control rod group according to the effective proliferation coefficient specifically comprises the following steps: When the effective proliferation coefficient is lower than a subcritical threshold value, determining that the motion state information of the control rod group is controlled lifting; When the effective proliferation coefficient exceeds a supercritical threshold, determining that the motion state information of the control rod group is controlled downward insertion; And when the effective multiplication coefficient is in a critical interval, determining the motion state information of the control rod group as the control rod to keep the current position unchanged. Further, according