Reports: “Something may have happened at Fukushima II Nuclear Power Plant” after M7.3 quake — Tepco “did not know cause of pressure rise”

Published: December 7th, 2012 at 5:20 pm ET
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Title: Current situation of Fukushima Daiichi and Daini nuclear power station
Source: Tepco
Date: Dec 7, 2012

Current status of the Fukushima Daiichi NPS and Fukushima Daini NPS after the earthquake (M7.3) at the offshore of Sanriku at 5:18 pm on December 7, 2012.

[...]

[As for the Fukushima Daini Nuclear Power Station]

After the earthquake occurred at 5:18 pm on December 7, 2012, we have conducted checkups at the Fukushima Daini Nuclear Power Station, and have found there was no problem.

Since we had found positive pressure in the reactor building of Unit 1, we have started Stand by Gas Treatment System* (the pressure was 0.05 kPa at that time of the start), and confirmed negative pressure in the reactor building. The negative pressure has been kept currently. We will conduct inspections for the cause of this matter.

The fluctuation of the monitoring post readings is being maintained within the range of normal fluctuation before and after the earthquake and currently no radiation impact to the outside of the power station has been reported due to the earthquake.

Source: Jiji Tsushin
Translation: EXSKF
Date: Dec 7, 2012

[...] in Fukushima II (Daini) Nuke Plant, the pressure inside the Reactor 1 building rose a little. At 5:20PM, workers lowered the pressure by manually operating [the system that] pumps out the air.

TEPCO’s manager Masayuki Ono explained “It’s not very serious”, even though he acknowledged the company did not know the cause of the pressure rise. According to TEPCO, there is no leak of radioactive materials in the environment.

EXSKF: “It looks something may have happened at Fukushima II Nuclear Power Plant. According to TEPCO, there was a small rise in pressure in the reactor building, which is to be kept at a negative pressure to prevent radioactive contamination from spreading into the environment.”

See also: Shukan Asahi: Fukushima Daini also had major damage from 3/11 -- Submerged under 4 meters of water

Published: December 7th, 2012 at 5:20 pm ET
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