Fukushima Daiichi NPS Prompt Report 2013

At around 10:46 AM today (on October 1), the nitrogen gas separation apparatus A was found to be stopped when the nitrogen gas separation apparatus A and C, which are injecting nitrogen to the RPV and the PCV of Unit 1-3 at Fukushima Daiichi NPS, were under operation.

The nitrogen gas separation apparatus C is operating continuously to secure required injection amount, and the nitrogen is being supplied.

Neither abnormality on the plant data (hydrogen concentration and temperature inside the PCV, etc.) nor significant change in the monitoring post data has been found.

The nitrogen gas separation apparatus B is in the standby state.