Hydrogen concentrations measured inside the Unit 1 Primary Containment Vessel at Fukushima Daiichi Nuclear Power Station
Here are the measurement results of hydrogen concentrations inside the Unit 1 Primary Containment Vessel at Fukushima Daiichi Nuclear Power Station.
Monitoring points
![Monitoring points](/en/wp-content/uploads/hd_582_1.png)
hydrogen concentrations
![hydrogen concentrations](http://www.tepco.co.jp/en/nu/fukushima-np/f1-rt/images-e/f1-PCV-hc-1u-lg-e.png)
- ※
Here is the measurement method for each hydrogen concentration.
- ※
A hydrogen concentration will be displayed as 0.00% when the measurement result is less than 0.00%.
- ※
For reference: The following is the “Limiting Conditions of Operations” designated in the implementation plan for hydrogen
concentrations inside the Primary Containment Vessel:
・Hydrogen concentration inside the Primary Containment Vessel: Less than 2.5%
Announcement
- Data may change or be missing due to equipment failure or regular inspections.