Novel fuel pool underwater lamp assembly

Abstract

The invention belongs to the technical field of nuclear power station in-service inspection. The invention relates in particular to a novel fuel pool underwater lamp assembly, and aims to design a novel fuel pool underwater lamp support, remodel an original underwater lamp support and a lamp, and enable maintenance personnel to stand or squat beside a pool to lift an underwater lamp out of a fuelpool, then place the underwater lamp in a low-irradiation area for replacement and illumination, and then place the underwater lamp back. Maintenance personnel do not need to adopt an inverted postureto loosen the fixing screw. In this way, the working time is greatly shortened, the irradiation dosage of workers is reduced, tools do not need to extend into the fuel pool, and the risk that foreignmatters fall into the fuel pool due to work of replacing the underwater lamp is eliminated. The novel fuel pool underwater lamp assembly is characterized by comprising a fixed underwater lamp, a lampmounting bracket, a hanging frame, a water loss protection device, a connecting bracket and a handle.

Description

technical field [0001] The invention belongs to the technical field of in-service inspection of nuclear power plants, and in particular relates to a novel underwater light assembly of a fuel pool. Background technique [0002] There are design problems in the installation bracket and lamps of the underwater lights in the K / R fuel pool of the Fangjiashan Nuclear Power Plant system. In the original design, when the underwater lights were turned to the highest position with the crank To take it out, you need to extend the wrench into the fuel pool and loosen the fastening screw to take out the underwater light for replacement. During this process, maintenance personnel are almost in an upside-down position, which makes replacement very difficult, and the working hours are prolonged, which exposes personnel to unnecessary exposure. In addition, tools need to be inserted into the fuel water pool, and maintenance personnel's hands must also be extended into the fuel water pool, w...

AI Technical Summary

Problems solved by technology

[0003] Under this design, an average of 4 working members are required to replace a group of underwater lights, and the average replacement time is 50 minutes. The average collective dose of a group of lighting replacements is about 12μsv. The number of faults in one overhaul of underwater lighting is about 7 sets of lights. Such time-consuming and labor-intensive work makes the work of replacing underwater lighting a high-risk, high-intensity, high collective dose, and a high probability of foreign objects falling into the fuel pool. Therefore, need to improve it

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