In the demonstration of the long fuel cycle of the nuclear power plant,the demonstration on the extension of instrument calibration interval is a very important part. By data collection and statistical analysis of typical pressure measuring instruments for chemical and volume control systems,the feasibility for the extension of instrument calibration interval is demonstrated by using AFAL method. The results show that： the instrument has good stability,the calibration cycle of instrument is extended from year to 18 month,the safety function not less than...
