The maintenance of atomic energy-related facilities has been performed mainly on the vibration method until now. However, for the maintenance in atomic energy-r elated facilities and the fact of the rotary apparatus, it is not enough at all only by the vibration method. We note the SPM method as a technique to watch th e bearing condition in accord with those facts and carried out verification. We wrote about a background of starting this verification, the principle of the SPM method, contents of the verif...
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Inspection of bearing diagnosis and development to optimization by SPM method

Abstract : For stress corrosion crack(SCC) of Inconel 600, on the opportunity of the leak issue of the reacter vessel he ad nozzle at Bujey-3 in 1991, MHI has been engaged in reseach and development about the field of evaluation, maintenanc e and inspection for the part using Inconel 600 on RCS pressurized boundary. In this report, it introduces about the tec hnique of preventive maintenance for the part using Inconel 600, which have been developed or under development by MHI....
英字タイトル:
Technique of Preventive Maintenance for part using Inconel 600

吉田 光宏 Mitsuhiro YOSHIDA 山本 昌志 Masashi YAMAMOTO 中村 直樹 Naoki NAKAMURA ...
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Portable 950keV X-band Linac X-ray Source for On-site NDT

For high earthquake resistance and ease of installation, free standing racks which are not anchored to the pool floor or walls has been adopted in many countries. Under the earthquake, the response of the free standing rack is highly nonlinear and involves a complex combination of motions (sliding, rocking, twisting, and turning) and impacts between the fuel assemblies and the fuel cell walls, rack-to-rack, and the pit floor and rack pedestals. We carried out seismic experiments on the full-scale rack ...
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Seismic Design Method of Free Standing Rack

Development of equipment reliability(ER) process, specifically for predictive maintenance (PdM) technologies integrated condition based maintenance (CBM) process, at Hamaoka Nuclear Power Station is introduced in this paper. Integration of predictive maintenance technologies such as vibration, oil analysis and thermo monitoring is more than important to establish strong maintenance strategies and to direct a specific technical development. In addition, a practical example of CBM is also presented to su...
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Development of Equipment Reliability Process using predictive technologies at Hamaoka Nuclear Power Station

Present all nuclear power plants in Fukui prefecture are located at the bay side of Japan Sea coast. New facilities may be planed to be at ocean side. The sea salt corrosion at the ocean side should be larger than it at the bay s ide. We have the salt damage experimental yard at Awara sea coast and at Fukui city (about 15km from coast) for the corrosion comparison study between Japan Sea coast and inland.We confirm the amounts of sea salt aerosol vary amo ng the season and year. The weight loss of specimen...
英字タイトル:
Determination of the Environmental Effect for the Sea Salt Aerosols Corrosion (2)

Fukui Prefecture presently hosts 15 rector units, including PWRs, BWR, FBR (Monjyu) and Japanese ATR (Fugen), all of which are located along the Japan Sea. Under such a circumstance, corrosion due to sea salt aerosols is one of the major factors causing ageing degradation of nuclear power plants facilities. Many scientists have been engaged in research on the corrosion of structures due to se a salt aerosols. In pursuing sea salt aerosol-induced corrosion research, it was necessary to perform corrosion tes...
英字タイトル:
Determination of the Environmental Effect for the Sea Salt Aerosols Corrosion (3)

量子科学技術研究開発機構（量研）は、文部科学大臣から ITER計画における国内機関、BA活動における実施機関の指定を受けて、国際研究協力プロジェクトである ITER計画及び日欧協力による BA活動を実施している。 本稿では、我が国における核融合エネルギー開発の中核的事業である ITER（イーター）計画、及び同計画を支援・補完し、核融合エネルギーの早期実用化に向けて実施している幅広いアプローチ（BA）活動の全体像を概説する。...

Illuminance measurement is one of heavy burden tasks, which needs two people at least and conducts at night, in the construction work. For these reasons, the demand of optimized illuminance measurement system is becoming high, and we have proposed the system using a mobile robot. In the construction site which does not have enough landmarks for SLAM, illuminance measurement task cannot be successful because the robot cannot estimate its position, going to the wrong place. For this problem, this paper also p...
英字タイトル:
Co-evolutionary Optimization for Autonomous Illuminance Measurement Robot