Category Archives: Criticaliries


Keiji Nokitowa 轩 樋 启示 Kosokudoro
There’s such a release of 137Cs (1st Gen) around Daiichi we can reasonably assume that the corium is in contact with the sea 

   
Cesium soars in water under No. 1 plant
Tokyo Electric Power Co. on Tuesday reported a surge in radioactive cesium levels in groundwater in an observation well at its Fukushima No. 1 nuclear power plant.
This signals radioactive contamination is spreading under the disaster-stricken facility.
Water sampled from the well Monday contained 9,000 becquerels of cesium-134 per liter and 18,000 becquerels of cesium-137, both about 90 times the levels found Friday, Tepco said. The well is near the turbine building for reactor 2 and about 25 meters from the plant’s harbor.
“We still don’t know why the level of radiation surged, but we are continuing efforts to avert further expansion of contamination,” a Tepco spokesman stated.
Government guidelines permit cesium-134 at 60 becquerels per liter and -137 at 90 becquerels. Once ingested, the substances accumulate in muscle and bone and are believed to cause cancers.
The water collected Monday also contained 890,000 becquerels of substances that include strontium, which emits beta radiation, compared with 900,000 becquerels found in groundwater sampled from the well Friday.
Groundwater cesium levels in the well and other observation wells had remained low until recently. Readings were often below the minimum detectable levels.
Explaining the reason for the low contamination in groundwater, Tepco had said cesium can be easily absorbed by soil.
Following the latest findings, however, Tepco officials now say they do not know why the cesium levels have surged.
“Mud that has absorbed radioactive cesium may have got mixed with the water. We will measure the (contamination of the) water again,” a Tepco official told reporters at the Fukushima Prefectural Government office.
The official also said Tepco will determine if radioactive substances are seeping into the sea after studying its seawater survey.
The company also said groundwater collected Monday from a well located near the reactor 3 turbine building and about 23 meters from the port was found to have contained 1,700 becquerels of beta radiation-emitting substances per liter.
The reading was about 20 times the level detected Thursday and the highest for such substances in the well.
The new readings came two days after Tepco said tritium, a radioactive isotope of hydrogen used in glow-in-the-dark watches, was present at levels 10 times the permitted rate.
Tepco said in late June it had detected the highly toxic strontium-90, a byproduct of nuclear fission that can cause bone cancer if ingested, at levels 30 times the permitted rate.
The substances, which were released by the meltdowns of reactors at the plant in the aftermath of the huge tsunami of March 2011, were not absorbed by soil and have made their way into groundwater.
Subsoil water usually flows out to sea, meaning these two substances could normally make their way into the ocean, possibly affecting marine life and ultimately impacting humans who eat sea creatures.


Recent Criticalities at Fukushima June 2013

 

Japan finds highly toxic strontium in Fukushima groundwater and levels are rising rapidly.
It isn’t just from leakage of contaminated water. Criticalities appear to be occurring at the plant, as evidenced by webcam observations.
What follows are excerpts from news stories describing the contamination.
HIGHER STRONTIUM DETECTIONS (AND TRITIUM)   

Reuters. ‘Japan finds highly toxic strontium in Fukushima groundwater’ (19 June, 2013 10:05), http://www.timeslive.co.za/scitech/2013/06/19/japan-finds-highly-toxic-strontium-in-fukushima-groundwater

Rising strontium-90 levels are no doubt being partially driven by the accumulation of highly contaminated water as the water used to cool the melted fuel and the contaminated ground water at the site overwhelm efforts at capture and decontamination.
The ground water contamination level for tritium now exceeds the Japanese Government maximum allowable level,
Water at the site is very radioactive because the water is in direct contact with melted fuel: 

Yoshida, R. (21 May 2013) Fukushima No. 1 can’t keep its head above tainted water’, The Japan Times, http://www.japantimes.co.jp/news/2013/05/21/reference/fukushima-no-1-cant-keep-its-head-above-tainted-water/#.UZ2eRJwQNX9

Tepco must perpetually pour water over the melted cores of reactors 1, 2, and 3 via makeshift systems to prevent the fuel from melting and burning again.

Some of the contaminated water in the buildings is being captured and held. Tepco is trying to de-contaminate this water. Their de-contamination system cannot filter tritium and other un-named radioisotopes. I’m not sure whether the system can filter strontium, but I’ve heard it argued that it cannot (I need a citation for that):

Kyodo ‘Fukushima tank springs major leak’ (2013, April 7) http://www.japantimes.co.jp/news/2013/04/07/national/fukushima-tank-springs-major-leak/#.UWDtrFf4KSq

[Excerpted] Around 120 tons of contaminated water with an estimated 710 billion becquerels of radioactivity has probably leaked into the ground under the Fukushima No. 1 power plant, Tokyo Electric Power Co. revealed Saturday.

…Although much of the cesium had been removed, the water was still tainted with other dangerous radioactive substances. According to the utility, around 710 billion becquerels of radioactive materials are estimated to have seeped out of the tank, which measures around 60 meters long, 53 meters wide and 6 meters deep and is covered by three layers of waterproof sheeting… [end]

Levels of contamination appear to be RISING:

9 June 2013 Last updated at 05:32 ET Fukushima nuclear plant: Toxic isotope found in groundwater BBC http://www.bbc.co.uk/news/world-asia-22964089

[Excerpted] Radioactive water was found to be leaking from a storage tank at the plant last month High levels of a toxic radioactive isotope have been found in groundwater at Japan’s Fukushima nuclear plant, its operator says. Tokyo Electric Power Company (Tepco) said tests showed Strontium-90 was present at 30 times the legal rate.

Criticalities are occurring.

Over the last ten days the steam releases at the plant have become MORE VOLUMINOUS, LONGER, and appear to contain MORE PARTICULATES.

COMMENT ABOUT POTENTIAL ROLE OF CRITICALITIES

Phillip UpNorth writes at Enenews: June 19, 2013 at 10:45 am

New criticalities at Unit2, and/or Corium2 are producing strontium-90.
Strontium-90 is produced by nuclear fission.

Since the amount of strontium-90 in ground water is way up over last year, we can tell that the rate of criticality is way up in 2013.

This big spike is from measurements of strontium-90 in ground water samples taken from wells.
TEPCO contends this is cooling water they pumped through Reactor 2, that leaked out through cracks.

But more probably, this is ground water that has flowed past Corium2. Or at least this is ground water that has flowed through the corium lava tube left after the underground departure of Corium2.

You figure it out.

All I know is that with a half life of 28.8 years, this strontium-90 will be contaminating the Pacific Ocean for many years to come.
“Cold Shutdown”, you betcha!

CRITICALITY WEBCAM EVIDENCE:

VIDEO FROM 3/16 http://www.youtube.com/watch?v=kadDNOVSdjs

SCREEN CAPTURES

Wideawake June 14, 2013 at 7:06 pm · Reply
I’ve not seen the amount of pink/red/green emissions before or this vivid, as in the first s/shot 03:32jst.. This is Not a cam anom. the red stuff’ was coming out from the smoke… https://dl.dropboxusercontent.com/u/77637499/june%2015%2003%2032jst%20enlg.PNG

https://dl.dropboxusercontent.com/u/77637499/june15%2003%2032jst.PNG

https://dl.dropboxusercontent.com/u/77637499/june15%2003%2033jst.PNG