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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视频检查技术。其目的是防止蒸汽发生器中杂质沉积以及管间外来物导致传热管的损害。利用泥渣枪从中间管廊将高压水流射入管束内,使水流机械能粉碎泥渣层,携带着碎渣的水流经外环廊吸出。清洗前的视频检查包括外环廊、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
The mechanical cleaning method and video inspection technology used on the secondary side of Daya Bay Nuclear Power Station steam generator are introduced. The purpose is to prevent the deposition of impurities in the steam generator and the damage of the heat transfer tubes caused by foreign substances in the tubes. The use of mud gun from the middle of the corridor will be high-pressure water jet into the tube bundle, the mechanical flow of water to crush the sludge layer, carry the debris of water flow through the outer ring suction. The pre-cleaning video inspection includes cleanliness inspection of the outer gallery, the intermediate gallery and its vicinity and the removal of foreign objects; after cleaning