A steam tube-leak is a very critical issue in industrial plants because the steam jet from the damaged point immediately causes damage to the surrounding tubes. Therefore, an early detection of the tube leak is important to reduce the maintenance cost and the outage time. In this study, we conducted a detection test of the steam tube leak using acceleration sensors; they are expected to catch a radial tube-vibration induced by acoustic propagation. Through the test, we found that the sensor detected a radia...
英字タイトル:
Development of detection method for a steam tube-leak in a boiler using acceleration sensors

日立 GE 安藤 浩二 Kouji ANDOU Non-Member The new dry-well cooler (DWC) for a severe accident has been developed to avoid release of radioactive materials to environment caused by primary containment vessel failure. The DWC can be operated using natural driving force to remove decay heat. The element tests using copper tube bundle with 3 rows and 5 levels were conducted under existing nuclear power plant conditions to estimate heat removal ratio with non-condensable gas (N2) and to confirm occurrence of natu...
英字タイトル:
Heat Removal Characteristics of Dry-well Cooler for a Severe Accident