Japan Atomic power Co.
Information about Operating Condition
- Periodical inspection has been carrying out at Tsuruga Power Plant No.1 since January 26, 2011.
＜Process of shutdown with the periodical inspection start＞
| 20:00 |
January 25, 2011: Power fall start |
| 0:00 |
January 26, 2011: Generator parallel off |
| 5:22 |
January 26, 2011: Reactor shutdown |
- Tsuruga Power Plant No.2 was shut down on May 7, 2011 to specify the leaked fuel with the rise of the radioactivity concentration in a primary refrigerant, and then periodical inspection has been carrying out since August 29, 2011
＜ Process of shutdown＞
| 9:00 |
May 7, 2011: Power fall start |
| 17:00 |
May 7, 2011: Generator parallel off |
| 20:00 |
May 7, 2011: Reactor shutdown |
Information about missing of data measuring
- Data measuring may miss because of maintenance of measuring equipment or computer for data processing.
In such cases, the data is displayed as “under maintenance”.
Information about data fluctuation
- Data of air dose rate or canal discharge monitor may increase under the influence of rainfall.
- Air dose rate may change under the influence of radioactive material (radon daughter which emits radiation) density in the air.
It has the feature that is often detected from the night to the morning and fluctuates periodically every day.
- When the large numbers of marine creatures such as jellyfishes are cast ashore into the outlet, the operating power may slightly decrease by the valve opening position of the steam condenser outlet at Plant No.1, or the wingspan level of the circulating water pump at Plant No.2.
- Indicated value of the stack gas monitor may change according to the work or the operation in the power plant, but it is monitored continuously and confirmed that it is within the level that it has no effect to the environment.
- The canal discharge monitor value of Tsuruga Power Plant No.2 may change under the influence of the natural radioactive nuclide in the spring water when the highwater flow discharge (seawater flow discharge) decreases because of suspension of operation.