Contaminated water leaked at reverse osmosis membrane of desalination unit. (After collecting gamma nuclides)
- 4/27/2012 9:17 Sob-contract company worker found water leakage.
- 9:30 Tepco employee stopped the desalination unit.
- 9:35 Water leaking alarming system finally started working in water purification control room.
- 10:19 Caught the leaking water by a plastic bag and stopped leakage by Valve isolation operations.
- 10:20 ~ 11:10 Collected leaked water.
- Leakage amount was 36L.
- Radiation level of the surface, Gamma : 1mSv/h Beta : 7mSv/h Alpha : Unknown
- Reason : Unknown.
- Leakage amount of radionuclide : Cesium 134 5.4E+4 Cesium 137 7.5E+4 Total beta 1.9E+9