Method for online measuring zinc content of coolant in primary circuit of pressurized water reactor

Abstract

The invention belongs to the technical field of water chemistry of reactor engineering and discloses a method for online measuring zinc content of a coolant in a primary circuit of a pressurized water reactor. The method comprises the following steps: measuring absorbencies of zinc of the coolant before and after adding a color developing agent and a buffer agent by using a spectrophotometric method, thus obtaining a work curve of a difference value between the two absorbencies and zinc concentration, and further obtaining the zinc content of the coolant. The method has the advantages that zinc in the coolant of the primary circuit of the pressurized water reactor can be online measured and the measuring accuracy is high.

Description

technical field

[0001] The invention belongs to the technical field of reactor engineering water chemistry, and in particular relates to a method for on-line determination of the zinc content in the primary circuit coolant of a pressurized water reactor. Background technique

[0002] Corrosion is one of the biggest hidden dangers threatening the safety and life of nuclear reactors. On the one hand, the corrosion of primary circuit component materials of nuclear reactors threatens the safety of the reactor, on the other hand, the activation and deposition of corrosion products will also cause excessive radiation dose in shutdown. In order to alleviate the stress corrosion of PWR structural materials and reduce the radiation dose of operators during overhaul, the water chemical technology of adding zinc to the primary circuit coolant is usually adopted in the world. This is mainly because zinc can replace some ions in the oxide film of the primary circuit equipment material, ...

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