Top > Releases ･ Announcements > Fukushima Daiichi NPS Prompt Report > 2013 > Water Leak at a Tank in the H4 area in Fukushima Daiichi Nuclear Power Station (Follow-up Information 10)
This is follow-up information on the "water leak at a tank in the H4 area in Fukushima Daiichi Nuclear Power Station" found on August 19.
From around 11:00 AM to around 3:00 PM, we conducted full inspections (appearance inspections and dose measurement) on the flanged tanks in the other areas, which are of the same type as the tank from which water has leaked.
Neither leak nor puddle was found by the appearance inspections on the tanks and the drain valves. However, 2 locations locally showing high dose rates were found around the H3 area tanks.
The surfaces of these locations were dry, and we confirmed that water flowed out neither into the inside of the dike nor into the outside of the dike. We also confirmed that the water levels of these tanks remain unchanged after receiving water.
[High dose rate locations, the surface dose equivalent rates at these locations (γ and β rays (70μm dose equivalent rate)), and tank water levels]
" Near the bottom flange of the tank No.4 in the group B in the H3 area: 100mSv/h and approx. 97% of the full water level
" Near the bottom flange of the tank No.10 in the group A in the H3 area: 70mSv/h and approx. 95% of the full water level
No locations around the other tanks and drain valves showed high dose rates.
© Tokyo Electric Power Company Holdings, Inc.
