Study of the Radiographic Testing in the Reactor Material by using Neutron and -ray

在核电站，质量保证的重要性已得到强烈承认。核电站使用大量的部件和管道。在运行期间和制造过程中，对零件和管道进行例行检查。辐射透明试验是检测它们的方法之一。辐射透明测试是利用辐射来检查物质的内部结构。传统的测试使用10至300 kVp的x射线发生器或^<60>Co和^<192>Ir的伽马射线源作为辐射源。然而，由于核电站使用了各种各样的部件和管道，现在不可能与现有的辐射源进行检查。然后我们开始研究开发一种新的辐射源，以建立一种检测传统方法无法检测的零件和管道的方法。我们研究了使用中子、γ射线和x射线作为辐射源的新方法，得到了满意的结果。

In nuclear power plants, the importance of quality assurance has been strongly acknowledged. A nuclear power plant uses great many parts and pipes. The parts and pipes are routinely checked during an operation period as well as in their manufacturing. The radiation transparent test is one of the methods to check them. The radiation transparent test inspects the internal structure of a substance using radiation. The conventional test used an X-ray generator of 10 to 300 kVp or gamma-ray source of ^<60>Co and ^<192>Ir as the radiat-on source. However, because a wide variety of parts and pipes are used in nuclear power plants, it is now impossible to check them with the existing radiation sources. Then we started the study to develop a new radiation source to establish a method of checking parts and pipes which could not be checked by the conventional method. We examined new methods using neutrons, ^<169>Yb gamma-ray, and X-ray as radiation sources, which brought us satisfactory results.