Institute of Nuclear TechnologyWorking to further enhance the safety
and reliability of nuclear power

Working to further enhance the safety and reliability of nuclear power
Comprehensively Addressing Issues of Aging

The following groups have been established by the Nuclear Power Plant Aging Research Center in order to understand the safety limits of equipment and structures: the Thermal Hydraulics and Mechanics Group and the Material Technology Group, which aim to understand and predict aging phenomena; the Non-Destructive Inspection and Monitoring Group, which conducts technological development to diagnose the degree of aging (such as the size of defects); and the Planning and Coordination Group, which plans and coordinates the aging research performed by these groups.
Age-related degradation is not the sole concern for the long-term operation of nuclear power plants; there are also concerns about degradation in the systems of quality assurance and maintenance management. The Nuclear Power Plant Aging Research Center, in collaboration with the Institute of Social Research, is engaged in comprehensive research that goes beyond equipment and structures to address the prevention of degradation from quality assurance and maintenance management perspectives. Through the Planning and Coordination Group, the Nuclear Power Plant Aging Research Center promotes research while gathering information on aging, further enhancing collaboration with external organizations, extracting comprehensive research subjects, and coordinating with the needs of electric power companies and external research institutions.
This is done with the aim of disseminating results that will contribute to on-site measures against aging at nuclear power plants.

“Aging” refers to the long-term use of equipment and materials that make up nuclear power plants. Japan’s first commercial light water reactor went into operation in 1970, and some nuclear power plants have now been in commercial operation for more than 40 years.

Group

  • Nuclear Power Plant Aging Research Center
    Thermal Hydraulics and Mechanics Group

    Research related to the evaluation of stress loading and thermal loading, which are consequences of aging, and the proactive prevention of problems
  • Nuclear Power Plant Aging Research Center
    Material Technology
    Group

    Research related to the degradation of structural materials due to causes such as corrosion and neutron irradiation damage
  • Nuclear Power Plant Aging Research Center
    Non-Destructive Inspection and Monitoring Group

    Research related to non-destructive testing techniques which can detect and assess the aging-related degradation of components and materials, and on techniques for equipment aging diagnosis, condition monitoring and life assessment