Tepco found highly contaminated water stocked at additional 4 locations in the trench facilities.
1.
In the pit of water circulating pomp at reactor.
500 m3
Cs-134 : 7.1*10^3 Bq/cm3
Cs-137 : 9.1*10^3 Bq/cm3
2.
In the pit of water circulating pomp at reactor3
600 m3
Cs-134 : 3.8*10^2 Bq/cm3
Cs-137 : 4.8*10^2 Bq/cm3
3.
In the pit of water circulating pomp at reactor4
Unknown m3
Cs-134 : 9.1*10^0 Bq/cm3
Cs-137 : 1.2*10^1 Bq/cm3
4.
The duct of Central radioactive disposal stock facility
Unknown m3
Cs-134 : 7.3*10^-1 Bq/cm3
Cs-137 : 9.4*10^-1 Bq/cm3
About 1 and 3, the reason was not announced.
About 2, Tepco assumes it may be from other leaking place of highly radioactive water.
About 4, Tepco assumes it’s from water underground or rain water leaking in.
They are planning to carry the water away.
Iori Mochizuki