Nuclear power station upper-part in-reactor component mounting method

Abstract

The invention discloses a nuclear power station upper-part in-reactor component mounting method comprising the steps that: (1) a produced upper-part in-reactor component is lifted and positioned with a forward direction into a vertical transportation support, wherein the vertical transportation support is provided with lugs; (2) the upper-part in-reactor component and the vertical transportation support are transported to a construction side with the lugs of the transportation support, and the entire lifting assembly are positioned into a mounting frame in a nuclear island plant designated mounting area; (3) the mounting of the upper-part in-reactor component is finished by using the mounting frame. Compared with prior art, according to the nuclear power station upper-part in-reactor component mounting method, with the vertical transportation support, upper-part in-reactor component vertical transportation is realized, such that frequent turning of the upper-part in-reactor component in a manufacturing plant and during a site construction process of an existing horizontal transportation scheme is avoided. Also, with the mounting frame, upper-part in-reactor component related part off-line mounting is realized, such that upper-part in-reactor component mounting can be carried out under the lack of condition at +7.5m water tank storage rack and peripheral areas.

Description

technical field [0001] The invention belongs to the field of design and construction of nuclear power plants, and more specifically, the invention relates to a method for installing the upper reactor internals of the nuclear power plant. Background technique [0002] The reactor internals are the internal components of the reactor pressure vessel of the nuclear power plant, which are used to support and fix the nuclear fuel assembly of the reactor. [0003] In the current construction plan, the upper stack internals are transported horizontally. The specific process is as follows: when leaving the factory, the upper stack internals are first placed on a special transport frame, and then turned into a horizontal transport state by hoisting; when they arrive at the construction site Afterwards, the upper reactor internals together with the transport frame are transported to the interior of the nuclear island building through the gate of the nuclear island equipment, and then t...

AI Technical Summary

Problems solved by technology

Since the condition of the storage bracket and the surrounding construction area is the prerequisite for the installation of the upper reactor internal components, there is a hard logical relationship between the construction procedures, which increases the risk of the progress control of the on-site construction and is not conducive to the optimization of the construction logic.

In addition, the entire installation process of the upper reactor internal components needs to be carried out in the refueling pool of the nuclear island powerhouse, which requires long-term occupation of the ring crane resources of the nuclear island powerhouse, which seriously affects the progress of other construction activities on the critical path of nuclear island installation, which is not conducive to construction resources The optimal configuration and the optimization of the total construction period

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