仅仅由于怀疑主蒸汽管道和再热蒸汽管道在运行工况下是否会有破损及爆裂的可能,就使电站承受不可避免的巨额费用。如机组计划继续运行的情况之下,必须对该管道进行检验,但检验费用如此之大,某些电站宁愿不进行检验就更换可疑管道。现有的大部分检验技术在开始检验以前都必须拆除 Merely taking into account the possibility of damage and bursting of the main steam pipe and reheat steam pipe under operating conditions, the plant is subject to unavoidable huge costs. If the crew is planning to continue operation, the pipeline must be inspected, but the inspection costs are so great that some plants would rather replace the suspect pipeline without inspection. Most of the existing inspection techniques must be disassembled before starting the inspection