Thursday, February 2, 2012

#Fukushima I Nuke Plant Reactor 4: Leak Continues from Reactor Well/SFP/DS

TEPCO hasn't identified the leak, but the leak is evidenced by the rapidly dropping water level of the Skimmer Surge Tank.

From Jiji Tsushin (2/3/2012):

東京電力は3日、福島第1原発の4号機原子炉建屋の原子炉と使用済み燃料プール、機器用プールに共通して張っている水が建屋内に依然として漏れ続けている とみられると発表した。水位はほぼ満水状態に維持しているが、あふれた水を受けるタンクの水位が通常の2倍のペースで低下しているため、漏出の可能性が高 いと分かった。

TEPCO announced on February 3 that the water in the Reactor Pressure Vessel, Spent Fuel Pool and DS Pool in Reactor 4 continues to leak into the reactor building. The RPV, SFP, and DS Pool are filled with water to the near-full level, but the water level of the Skimmer Surge Tank is dropping twice as fast as normal, which likely indicates a leak.


The water is contaminated with radioactive materials, and is considered to be flowing to the basement of the reactor building where the contaminated water has already been sitting. The possible causes include the frozen or damaged pipe joints, and the workers are trying to identify the location(s).

From TEPCO's Plant Parameter data, the water levels of Reactor 4 Skimmer Surge Tank:

2/3 11AM: 3179 millimeters
2/3: 5AM: 2085 mm
2/2 11AM: 2498 mm
2/2 5AM: 2784 mm
2/1 11AM: 3223 mm
2/1 5AM: 3225 mm
1/31 11AM: 3977 mm
1/31 5AM: 4357 mm
1/30 11AM: 5416 mm
1/30 5AM: 5208 mm

The relationship of the Reactor Well (RPV), SFP, and DS Pool:

SFP and Skimmer Surge Tank:

(Graphics created by @pluredro based on TEPCO's information)


Anonymous said...

Fukushima: A Nuclear War without a War: The Unspoken Crisis of Worldwide Nuclear Radiation
by Prof. Michel Chossudovsky
Global Research, January 25, 2012

Anonymous said...


Atomfritz said...

When the thawing season begins, the true extent of the leaks will reveal.

I predict a massive splash flood of thousands of cubic meters of highly contaminated water from the reactor well and the reactor 4 basements around the reactors' area, making the water decontamination facilities which are located near reactor #4 off-limits to carbon-based robots by raising the background radiation there from a millisievert level to a sieverts level.
Most of the water anyway will probably conveniently spill over to the ocean.

Then other issues like the little remaining water coverage in the spent fuel pool will become pressing, when the then-empty reactor vessel takes over the function of the skimmer surge tank.

Only one thing can be predicted for sure: The situation of the plant will deteriorate substantially at spring, including the danger of new massive widespread radiation emission.

As it then will be not a matter of days but a matter of hours when the SFP water supply fails for whatever reason before a new catastrophe sets on.

Post a Comment