28 Février 2013
February 28, 2013
Posted by Mochizuki
The puddle of contaminated water was found in reactor2. Tepco explains it came down from the second floor of turbine building.
They concluded it was rainwater but there is no explanation about why they didn’t find the puddle of water before.
-At around 12:12 PM on February 23, a cooperative company worker found a puddle near the center of the Heater Room on the first floor of Unit 2 Turbine Building. The puddle was approx. 5m x 1m x 1mm. It was confirmed that water was dripping from some areas of the ceiling (a drop every 5 seconds) and that there was no leakage from the piping and temporary hose installed near the puddle. The radioactivity density analysis results of the water sampled from the puddle are as follows. Cesium 134: 1.3×10^2Bq/cm3, cesium 137: 2.5×10^2Bq/cm3. The contamination conditions (radioactivity densities) of the floor surface are as follows: Cesium 134: 1.2×10^2Bq/cm3, cesium 137: 2.1×10^2Bq/cm3. The atmosphere dose rates measured at the site are as follows: γ+β: 0.7mSv/h, γ: 0.7mSv/h. Also, a puddle (approx. 15m x 11m x 10mm) was found in the Turbine Exhaust Filter Room on the second floor of Unit 2 Turbine Building, which is located just above the site where a puddle was first found. On February 25, the puddle in the Turbine Exhaust Filter Room on the second floor of Unit 2 Turbine Building was identified to be the water dripping from the ceiling. The radioactivity density analysis results of the water dripping from the ceiling of the Turbine Exhaust Filter Room (obtained on February 26) are as follows. Cesium 134: 1.1×10^0Bq/cm3, cesium 137: 1.9×10^0Bq/cm3. The water is assumed to be rainwater. Upon site investigation, it was confirmed that water dripping onto the floor of the Heater Room on the first floor (a drop every 5 seconds) and onto the floor of the Turbine Exhaust Filter Room on the second floor (a drop every 2-3 seconds) had been continuing. The incident is currently being investigated in details.