Method for checking leakage of vertical cooler of hydrogen cooled generator for nuclear power plant

Abstract

The invention relates to a method for checking leakage of a vertical cooler of a hydrogen cooled generator for a nuclear power plant. The method includes discharging remain water after the hydrogen cooled generator cooled generator stops working and gas is replaced, opening a cover plate of a water chamber on the upper portion of the hydrogen cooled generator, exposing water pipes of the cooler, pouring water after a drain outlet at the bottom of the generator is opened until the water pipes of the cooler is submerged by water, recording water pipes generating air bubbles, and completing leakage checking; and plugging two ends of the water pipes of the leaked water pipes. Compared with the prior art, drawing out the cooler from the generator body is omitted, workload is reduced, the method for checking leakage is accurate, visual and clear at a glance, no leakage checking missing is caused, efficiency is high and construction period can be shortened.

Description

technical field [0001] The invention relates to a leak checking method, in particular to a leak checking method for a vertical cooler of a hydrogen-cooled generator used in nuclear power. Background technique [0002] The hydrogen cooler is an important part of the hydrogen-cooled generator. With the passage of the operating time of the unit and the aging of the equipment, its leakage is inevitable. Leakage of the water pipe of the hydrogen cooler of the generator is the main cause of the internal hydrogen leakage of the generator, which directly threatens the operation safety of the generator. The traditional leak detection method is to pull out the cooler from the generator body after the unit is shut down, and carry out water pressure to confirm the pipes one by one. Since there are many cooling water pipes in the cooler, it is very cumbersome to check, and those pipes with insignificant leakage It is not easy to find, resulting in omission and rework. Its disadvantages...

AI Technical Summary

Problems solved by technology

The traditional leak detection method is to pull out the cooler from the generator body after the unit is shut down, and carry out water pressure to confirm the pipes one by one. Since there are many cooling water pipes in the cooler, it is very cumbersome to check, and those pipes with insignificant leakage It is not easy to find, resulting in omission and rework

Its disadvantages are heavy workload, low work efficiency and long construction period