Method for realizing nuclear reactor load tracking

Abstract

The invention discloses a method for realizing nuclear reactor load tracking. The method uses two groups of relatively-independent control rods for reactive and axial power shift power control of a nuclear reactor; the two groups of relatively-independent control rods are a T rod group and a K rod group respectively, wherein the K rod group consists of a plurality of beams of black rods; the T rodgroup comprises a plurality of beams of grey rods and black rods; during the base load operation of the nuclear reactor, only the K rod group is inserted into a reactor core, and the insertion depthof K rod group is greater than or equal to the bite amount plus 24 steps; during the load tracking operation of the nuclear reactor, both the T rod group and the K rod group are inserted in the reactor core. The method disclosed by the invention has the benefits that only one group of control rods is required to be inserted into the reactor core during the base load operation, and the defects thatthe fuel consumption is non-uniform, the control rod fluence is increased, the control rod absorption body fuel consumption is more, the control rod drive mechanism load is increased, and the like due to the insertion of the more control rods into the reactor core during the base load operation are overcome.

Description

technical field [0001] The invention relates to the technical field of design and operation of a pressurized water reactor nuclear power plant, in particular to a method for realizing load tracking of a nuclear reactor. Background technique [0002] If the pressurized water reactor nuclear power plant wants the unit to follow the grid demand for load tracking, it is necessary to adjust the reactor power by adjusting the reactivity. There are two main ways to achieve this: 1) adjust the concentration of boric acid in the main coolant; 2) adjust the control rod in Insertion depth in the core. The first adjustment method requires the chemical and volume control system to inject water or high-concentration boron solution into the primary circuit to dilute or borate the main coolant. Since boron takes time to enrich and dilute, it is also slower to regulate the power of the reactor. On the other hand, if the load of the power plant needs to rise and fall frequently, and the bor...

AI Technical Summary

Problems solved by technology

[0008] In view of the above-mentioned existing implementation methods of unadjusted boron load tracking, it is required that two sets of control rod groups are inserted into the core during base load operation, resulting in uneven fuel burnup, increased control rod fluence, and control rod absorption. In view of the disadvantages of higher body fuel consumption and increased load of the control rod drive mechanism, the present invention provides a method for implementing load tracking of nuclear reactors. This method only requires a group of control rods to be inserted into the core during base load operation. The method It avoids the disadvantages of uneven fuel burnup caused by too many control rods inserted into the core during base load operation, increased control rod fluence, high burnup of control rod absorbers, and increased load of control rod drive mechanisms.

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