A Proactive Materials Degradation Management (PMDM) project has been carried out at the Frontier Research Initiative (FRI), New Industry Creation Hatchery Center, Tohoku University for 5 years, as a part of a Nuclear Industries Safety Agency (NISA, now the Secretariat of the Nuclear Regulation Authority) project that was originally formed in 2007 to define an Aging Management Program that addresses unexpected structural material failures in Light Water Reactors (LWRs). Such a program required, therefor...
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Proactive Evaluation of Potential and Latent Materials Degradation Phenomena by PIRT

In order to improve the understanding of the effect of dissolved hydrogen (DH) on the property of oxide film in high temperature water, the electronic properties of the oxide film on Alloy 600 in hi gh temperature water under various levels of DH were studied by contact electric resistance (CER) technique and electrochemical impedance spectroscopy. The results showed that the oxide film exhibit ed n-type semiconductivity. The film resistance, charge transfer resistance and ionic defect transport resistance...
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Investigation of the Effect of Dissolved Hydrogen on the Oxide Film on Alloy 600 in HighTemperature Water by In-situ Electrochemical Techniques

A Proactive Materials Degradation Management (PMDM) project has been carried out at the Fronti er Research Initiative (FRI), New Industry Creation Hatchery Center, Tohoku University for 5 ye ars, as a part of a Nuclear Industries Safety Agency (NISA) project that was originally formed in 2007 to define an Aging Management Program that addresses unexpected structural material fa ilures in Light Water Reactors (LWRs). Such a program required, therefore, the development of a life prediction capability for sp...
英字タイトル:
Proactive Evaluation of Potential/Latent Degradation Phenomena for Light Water Reactor Structural Materials and System Safety

The predictive and preventive maintenance technologies are of increasingly importance for the long term operation (LTO) of Light Water Reactor (LWR) plants. In order f or the realization of LTO, it is essential to prevent the degradation phenomena from emergence using proper maintenance programs on foreseeing the phenomena and evalua ting their rates of development. In this paper, the proactive activities and the aging degradation phenomenon which were discussed in the Proactive Aging Management Gro up Mee...
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Proactive Materials Degradation Management and Development ofCondition Monitoring Technology

A Proactive Materials Degradation Management (PMDM) project has been carried out at the Frontier Research Initiative (FRI), New Industry Creation Hatchery Center, Tohoku University for 5 yea rs, as a part of a Nuclear Industries Safety Agency (NISA, now the Secretariat of the Nuclear Regulation Authority) project that was originally formed in 2007 to define an Aging Management P rogram that addresses unexpected structural material failures in Light Water Reactors (LWRs). Such a program required, therefore,...
英字タイトル:
Proactive Evaluation of Potential and Latent Materials Degradation Phenomena

The predictive and preventive maintenance technologies are of increasingly importance for the long term operation (LTO) of Light Water Reactor (LWR) plants. In order for the realization of LTO, it is essential to prevent the degradation phenomena from emergence using proper maintenance programs on foreseeing the phenomena and evaluating their rates of development. In this paper, the research subjects which should be required for the aging degradation phenomenon in LWR structural materials which were ...
英字タイトル:
Proactive Material Degradation Research Subjects for LWR