Many rotating equipments, such as blowers and pumps, are installed in the Tokai Reprocessing Plant. Blowers are important to keep containment ability of nuclear materials in the plant. This work focuses on the function of the blowers as an object of the evaluation. MTTF(Mean Time To Failure) and failure ratio distribution of the configuration parts in the blower were obtained from the maintenance data based on 30-year experiences. The reliability of every parts in the blower was evaluated by calculating M...
英字タイトル:
Development of maintenance technology for rotation equipments in the Tokai Reprocessing Plant I?Failure analysis for configuration parts of rotating equipment-

Radioactive materials in nuclear plants are confined in the facility at a negative pressure less than atmospheric pressure, which is maintained by the ventilation system. Therefore, it is important for nuclear safety to keep the negative pressure an d to monitor the condition of the ventilation system. Also, immediate maintenance is essential when the ventilation system fails. In the Tokai Reprocessing Plant, monitoring the negative pressure in the facilities and the condition of the ventilatio n system is...
英字タイトル:
Negative Pressure Monitoring and Maintenance Management of theVentilation System in the Tokai Reprocessing Plant

Tokai Reprocessing Plant (TRP) is implementing its decommissioning activities based on the decommissioning plan approved by Nuclear Regulation Authority (NRA). In the decommissioning, safety countermeasure against earthquakes and tsunamis is a top priority matter, especially for High Active liquid Waste facility (HAW) and Tokai Vitrification Facility (TVF), which handle highly radioactive liquid waste with high safety risks. This study focuses on the immediate tsunami countermeasures among the other safety ...
英字タイトル:
Evaluation of Tsunami debris impact on Tokai Reprocessing Plant

The Tokai Reprocessing Plant has recovered nuclear materials from spent nuclear fuel. Reprocessing process is consisted of shearing process, a dissolution process and an extraction process etc. Each facilities designed to confine radioactive materials in controlled area to keep negative pressure using ventilation system. This system has been used over 40 years. We analyzed influences to the trouble of aging equipment, and we considered necessary additional check out system to prevent troubles based on ...
英字タイトル:
Maintenance for ventilation system of The Tokai Reprocessing Plant