Regarding Fukushima Daiichi Nuclear Power Station Unit 1, taking into 
account the possibility of hydrogen accumulating inside, we have been 
considering encapsulation of hydrogen by injecting nitrogen to the 
reactor containment vessel.

Today, we received an order from minister of economy, trade and industry 
to report on matter such as necessity of encapsulating nitrogen, method 
for implementation, and impact assessment of safety. Accordingly, we have 
compiled related matters and reported to minister of economy, trade and 
industry today. The report was approved after the deliberation in the 
Ministry of Economy, Trade and Industry.

Base on the report, we will begin injecting nitrogen to the reactor 
containment vessel of Unit 1 today, around 10:30pm. 

Appendix1: Necessity for injecting nitrogen(PDF 11.1KB) 
Appendix2: Schematic Diagram Regarding Injection of Nitrogen Gas 
           into the PCV(PDF 17.9KB)