While drying-out, there is plenty of steam coming out fromthe feed water tank TK45001.The water seal of U-bend is designed to be 2m high, whichis consistent with the design on site. However, the thermaldeaerator pressure is set at 0.02MPa. If the pressurefluctuates, the water seal will fail. There is no allowance inthis design. XZT need to modify the water seal height.2. XZT modifies the pressure setting, but it cannot belower than 0.015MPa (the value is the steam pressurecorresponding to water at 104 ℃).