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介绍了大亚湾核电站蒸汽发生器二次侧所采用的机械清洗方法与电视检查技术。其目的是防止蒸汽发生器中杂质沉积以及外来物导致传热管的损伤。利用泥渣枪从中间管廊将高压水流射入管束内,由水流机械能粉碎泥渣层,携带着碎渣的水流经外环廊吸出。清洗前的电视检查包括外环廊、中间管廊及其邻近区的清洁度检查和外来物的取出;清洗后的电视检查,包括外环廊、中间管廊及其邻近区、管间的清洁度检查和外来物的取出。电视检查后,需由反映检查过程的录像带来验证和确认检查过程的质量状况。不允许存在漏检、图像不清
The mechanical cleaning method and television inspection technology used on the secondary side of Daya Bay Nuclear Power Station steam generator were introduced. Its purpose is to prevent the deposition of impurities in the steam generator as well as foreign objects leading to damage to the heat transfer tubes. Using the mud gun from the middle of the corridor will be high-pressure water jet into the tube bundle, the mechanical flow of water can crush the sludge layer, carry the debris of water flow through the outer ring suction. Cleaning before the TV inspection, including the outer ring gallery, the middle of the corridor and its vicinity of the cleanliness inspection and removal of foreign objects; After cleaning the television inspection, including the outer gallery, the middle of the gallery and its adjacent areas, between the cleaning Degree inspection and removal of foreign objects. After the television inspection, the quality of the inspection process shall be verified and confirmed by a video tape that reflects the inspection process. Not allowed to exist missing inspection, the image is unclear