本部分适用于金属材料制承压设备用原材料或零部件和焊接接头的超声检测，也适用于金属材料制在用承压设备的超声检测。

本标准适用于架空输电线路用钢芯软铝绞线。

NB/T 20259.4-2014.Code of valuation on bill of quantities of nuclear power plant construction works-Part4: Ventilation and air-conditioning. 1范围 NB/T

NB/T 20259.4-2014.Code of valuation on bill of quantities of nuclear power plant construction works-Part4: Ventilation and air-conditioning. 1范围 NB/T

NB/T 20259.4-2014.Code of valuation on bill of quantities of nuclear power plant construction works-Part4: Ventilation and air-conditioning. 1范围 NB/T

NB/T 20261-2014.Design criteria for emergency core cooling system of pressurized water reactor nuclear powcr plants. 1范围 NB/T 20261规定了二代改进型乐水堆核电厂应急堆芯冷

NB/T 20262-2014.Design criteria for steam generator blowdown system of pressurized water reactor nuclear power plants. 1范围 NB/T 20262规定了压水堆核电厂蒸汽发生器排污系

NB/T 20269-2014.Design and fabrication specification for reactor coolant pump of pressurized water ractor nuclear power plant. 1范围 NB/T 20269规定了压水堆核电厂

NB/T 20270-2014.Criteria for human factors applications of computerized operating procedure systems in nuclear power plants. 1范围 NB/T 20270规定了人因工程在核电厂

NB/Z 20250-2013.Guidance for the decision on modernization for instrumentation and control system important to safety in nuclear power plants. 1范围 NB/

NB/T 20253-2013.System cleaning for PWR nuclear power plant installation and commissioning. 1范围 NB/T 20253规定了压水堆核电厂系统现场安装/调试期间的清洗要求。 NB/T 20253适用于压水堆核

NB/T 20254-2013.Criteria for nuclear power plant reactor coolant system leakage detection. 1范围 NB/T 20254规定了压水堆核电厂反应堆冷却剂泄漏探测系统设计的基本要求、探测泄漏流所需仪表的要求和探测泄