Pressurized water reactor nuclear power plant pressurizer spraying apparatus

Abstract

The present invention belongs to pressurized water reactor nuclear power plant equipment, and particularly relates to a pressurized water reactor nuclear power plant pressurizer spraying apparatus. According to the pressurized water reactor nuclear power plant pressurizer spraying apparatus, the top of the upper dome of a pressurizer is provided with a manhole assembly, a spraying ring pipe supporting base is fixedly connected with the inner wall of the upper dome of the pressurizer through a surfacing welding boss for ring pipe supporting, a spraying ring pipe supporting pipe is connected with the spraying ring pipe supporting base, a spraying ring pipe is connected with the spraying ring pipe supporting pipe, is connected with a spraying head through a spraying head threaded connection pipe, and is connected with a water inlet pipe through welding, and the water inlet pipe is communicated with a heat shock resistance casting pipe, and is connected with the safety end of a pressurizer spraying pipe connection nozzle through a water inlet pipe supporting boss. The pressurized water reactor nuclear power plant pressurizer spraying apparatus has the following advantages that: the plurality of the spraying heads are arranged on the ring pipe, such that the spraying uniformity can be improved, and the arrangement positions of the spraying heads can be changed according to the actual requirements so as to achieve adjustment on different spraying amounts in different spraying areas; and the spraying head has characteristics of small size, light weight and convenient maintenance and replacement.

Description

technical field [0001] The invention belongs to equipment of a pressurized water reactor nuclear power plant, in particular to a spray device for a pressure stabilizer of a pressurized water reactor nuclear power plant. Background technique [0002] A spray head is installed on the top of the pressurizer of the pressurized water reactor nuclear power plant, and is connected with the cold section of the reactor coolant system through the spray pipeline. There is a saturated vapor-liquid two-phase in the pressurizer, and the water in the reactor coolant system is subcooled water, which sprays the saturated steam space of the pressurizer through the spray pipeline and the spray head installed inside the pressurizer, so that The saturated steam is condensed to achieve the purpose of reducing the pressure inside the pressurizer. [0003] In the past, PWR nuclear power plants usually installed a large-flow spray head on the top of the pressurizer. Because of the large flow rate o...

AI Technical Summary

Problems solved by technology

[0003] In the past, PWR nuclear power plants usually installed a large-flow spray head on the top of the pressurizer. Because of the large flow rate of the spray head, the uniformity of spraying was limited, and because PWR nuclear power plants often used solid Cone large flow spray head, the structural characteristics of this type of spray head determine that the larger the flow rate, the larger the blade size of the spray head, the worse the atomization effect, and the greater the flow resistance (pressure drop) of the spray head

At the same time, the large structural size and mass are also large, which brings certain difficulties to maintenance and replacement.

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