11,400,000 Bq/m3 of cesium leaked again, “metal fatigue of a coupler”

 

0.2 m3 of contaminated water leaked again. It contained 11,400,000 Bq/Kg of cesium.
It leaked from a coupler part made of stainless steel. They found it broken. It is presumed that over pressure caused metal fatigue. Tepco is going to check similar parts of other places. (cf. [Reactor3,4] 8 billion Bq/m3 of cesium leaked from contaminated water pipe)

Tepco explains like this below,

Time and day
At around 10:16 AM on August 17, 2012

Location
In the temporary warehouse of the desalination system (Reverse osmosis
membrane) 3

Detail
1. A worker of a cooperative company on patrol found a puddle on the floor as
he entered the temporary warehouse (at 10:16).
2. The desalination system (RO3) was stopped manually (at 10:17) and the
leakage was stopped (at 10:22).

Estimated leakage amount
Approx. 0.2 [m3]

Radiation dose measurement result (surface radiation dose)
γ: 0.1[mSv/h], β: 3 [mSv/h]

 

 

 

 

 

 

Source 1 2

 

 

Iori Mochizuki