| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pipeline crack progress quantity predicting device that can immediately know the total value of the crack progress quantity caused by fluctuating thermal load during a long plant cycle and can continue to monitor constantly. SOLUTION: A pipeline crack progress quantity predicting device has a temperature detector 9 installed in a monitor place 30 in a pipeline with its inner surface receiving thermal load, an arithmetic processing unit 10 inputting a signal from the detector 9 and computing the pipeline crack progress quantity in the place 30, and a display device 20 inputting a signal from the arithmetic processing unit 10 and displaying the crack progress quantity of the pipeline in the installed place of the detector 9. The arithmetic processing unit 10 consists of a means 100 for computing generated stress, a simplified means 200 for computing the J-integrated value, a means 400 for comparing with a crack propagation curve, and a means 500 for computing the crack progress quantity. The display device 20 inputs a signal from the means 500 for computing the crack progress quantity and displays the crack progress quantity of the pipeline.</p> |
