Checking testing device for pool liquid meter of PTR of nuclear power station and testing method of checking testing device

Abstract

The invention provides a checking test device for a pool liquid meter of a PTR of a nuclear power station and a test method of the checking test device. The test device comprises a communicating device connected with a demineralization water system and used for providing the water source, and a plurality of adapters respectively installed at the bottoms of liquid meters detachably in a sealing mode, wherein a plurality of connecting pipes are arranged on the communicating pipe, and a main needle-shaped valve is arranged on each connecting pipe; each adapter is connected with the connecting pipes through water injecting pipes, the water injecting pipes are further provided with branch pipe needle-shaped valves and branch joints, and the branch joints are arranged between the main needle-shaped valves and the branch pipe needle-shaped valves, and at least one water dividing opening is reserved in each branch joint and used for adjusting a single liquid level of each liquid meter. The testing method utilizes the testing device. The checking test device for the pool liquid meter of the PTR of the nuclear power station and the test method of the checking test device are restricted by on-site test conditions, the test cost is lower, the test process is more flexible and more efficient, and higher popularization and application value is achieved.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant debugging, in particular to a verification test device and a test method for a liquid level gauge in a PTR pool of a nuclear power plant. Background technique [0002] PTR (Fuel pool cooling and purification system, fuel pool cooling and purification system) pool level gauge is an important device to monitor the pool liquid level to generate automatic replenishment signals and issue protection commands. According to the design requirements of the pressurized water reactor nuclear power plant, all liquid level gauges of PTR need to be compared with each other during commissioning to ensure that the reading deviation of all liquid level gauges is within the allowable error range. The current test method is to inject desalted water into the pool, all the liquid level gauges in the pool measure different liquid levels simultaneously, and check whether the measurement deviation of each liqu...

AI Technical Summary

Problems solved by technology

[0003] However, because the PTR pool level gauge adopts a large number of redundancy and "anti-common cause failure" designs, the number of level gauges that need to be cross-compared is as many as 40, and because the entire pool needs to be filled with water, the test time is long. High test cost

If there is a problem with the liquid level gauge, it is necessary to perform filling and draining operations many times, which is inconvenient for quick processing, and the cost of repeated tests is high, which seriously affects the progress of the test; on the other hand, this test plan not only occupies the main line of construction, but also has high requirements on the site environment , before the pool enters the water, it is necessary to complete the nuclear cleaning of all PTR pools, and temporarily block the holes on the pool wall. During the water intake, it is also necessary to ensure that there are no foreign objects around the pool.

However, during the commissioning stage, there is a lot of installation work in the PTR pool, the pool is not clean, there is a lot of dust and debris inside, and the test conditions are not available

Therefore, this test plan is only applicable to the periodic test after the commercial operation of the unit, and not applicable to the on-site commissioning stage before commercial operation

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