Friday, December 7, 2012

Slight Rise in Pressure in #Fukushima II (Daini) Nuke Plant Reactor 1 Bldg After Dec 7 M7.3 Quake

Update on the Magnitude 7.3 outer-rise earthquake on December 7 off Miyagi Prefecture. (Yesterday's report is here.)

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.

Jiji Tsushin (12/7/2012):


TEPCO: Fukushima I Nuke Plant "No abnormality", Fukushima II [reactor] building pressure rise


TEPCO announced that there was no new abnormality in Fukushima I and II Nuclear Power Plants. The quake measured on site was small, and it didn't affect the water injection into the reactors or the cooling of the spent fuel pools.


However, 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.

Ah the famous last word, "No leak of radioactive materials in the environment".

There were 11 people injured in the M7.3 earthquake. There was a M6.2 earthquake 13 minutes after the M7.3 earthquake, but the Japanese tweets say there was no media report on that one, other than in the data pages of Japan Meteorological Agency and other meteorological news sites. Many people say they did indeed felt two shakes.

Right now, some people are trying to figure out what the hell is "autaah raizu" earthquake (and remember, "r" and "l" are indistinguishable to the Japanese) - a transliteration of "outer-rise" earthquake".


Anonymous said...

>At 5:20PM, workers lowered the pressure by manually operating [the system that] pumps out the air.

I wonder where the "air" gets pumped to?

"The outer trench swell, outer trench high, or outer rise is a subtle ridge on the seafloor near an oceanic trench, where a descending plate begins to flex and fault in preparation for its descent into the mantle at a subduction zone. The lithosphere is bent upwards by plate stresses, and is not in isostatic equilibrium (distinguish from the "outer ridge" of a forearc)."

Anonymous said...

There's no "leak", because it's more like a "flood"~

Post a Comment