Posts Tagged ‘overflow’

4,200,000,000Bq of β and 10,000,000 Bq of γ nuclides leaked from ALPS again / New technology never get into operation

Extremely high level of radiation leaked from multiple nuclide removing system ALPS (Advanced Liquid Processing System). This system has been continuously in the serious trouble since they started the hot test last Spring. However, Tepco doesn’t change their plan to try to purify 1,960 m3 / day of contaminated water from this Summer. ALPS is [...]

[100m3 overflow] Accident scale INES level 3 potentially / The amount of damage up to a few million USD

Following up this article.. [100m3 overflow] No information obtained about a potential suspect / Tepco practically give up investigation [URL]   The overflow accident of 100m3 corresponds to INES Level 3 if they evaluate it based on the volume and density of the overflowed radioactive density, a press revealed in the press conference of 3/26/2014. [...]

[100m3 overflow] No information obtained about a potential suspect / Tepco practically give up investigation

Following up this article.. [100m3 overflow] Tritium density in groundwater spiking up 60m east from the overflowed tank [URL]   Tepco ended up obtaining no useful information to identify someone who can have operated the valves for malicious purpose. They have been investigating 124 workers including 16 Tepco employees. They held 169 interrogations, which last [...]

[100m3 overflow] Tritium density in groundwater spiking up 60m east from the overflowed tank

Following up this article.. [100m3 overflow] All β detected 60m east from the tank / Contamination already penetrating to groundwater [URL]   Tritium density is rapidly increasing in groundwater taken from the same point. Since they started sampling from this boring hole on 3/17/2014, Tritium density had been under detectable level for the first 2 [...]

[100m3 overflow] All β detected 60m east from the tank / Contamination already penetrating to groundwater

Following up this article.. [100 m3 overflow] “Who turned on the wrong valve and why ?” / Still not identified [URL]   The contamination is possibly penetrating to groundwater already, according to Tepco. One month after the overflowing accident, 120,000 Bq/m3 of all β nuclide to include Strontium-90 was detected from groundwater. The sample was [...]

Contaminated water storage already 91% full / Could be overflowing by this coming June

Related to this article.. 21 tanks and 1km of pipe must be decontaminated due to the system failure of ALPS / Not known when to reboot ALPS [URL]   From Tepco’s own data, their contaminated water storage is already 91% full. The report was published on 3/19/2014. At the moment of 3/18/2014, the total volume [...]

[100 m3 overflow] “Who turned on the wrong valve and why ?” / Still not identified

Following up this article.. Tepco to re-interrogate 43 workers about 100 m3 overflow [URL]   On 3/7/2014, Tepco announced they hadn’t obtained any useful information from the interrogation. The overflow of 100m3 contaminated water was caused by the wrong valve settings. However, nobody was supposed to work beside the issued valves that day, and also [...]

[100m3 overflow] More than half of water absorbed by the ground soil / Possibly flowing into groundwater again

Following up this article.. [100m3 overflow] Contaminated water is removed by “hand-digging” of human workers [URL]   More than half of the overflowed contaminated water was absorbed by the ground before they removed, according to Tepco. Among overflowed 100m3 contaminated water, it was only 42 m3 that Tepco managed to remove. The rest of 58 [...]

[100m3 overflow] Tepco “Abnormality was too slight to notice”

Following up this article.. [100m3 overflow] Contaminated water is removed by “hand-digging” of human workers [URL]   The abnormality of tank water level trend was too slight to recognize, Tepco stated in the press conference of 3/5/2014.   When 100m3 of highly contaminated water overflowed from the tank, the operators were watching the monitor of [...]

The tank had water to 98% of capacity / Tepco “Can’t reduce due to the serious shortage of water storage”

Following up this article.. Tepco to re-interrogate 43 workers about 100 m3 overflow [URL]   The overflowed tank had contaminated water up to 98% of its capacity before the overflowing accident, according to Tepco. The primary cause of the overflow was because additional water was lead in due to the mis-operation, however there was the [...]

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