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Fukushima Daiichi Unit 2 Measures 530 Sieverts an hour but Units 1 and 3 Hotter Still

TEPCO is reporting measuring radiation levels of 530 SIEVERTS AN HOUR (10 will kill you dead pretty quickly) and has discovered a 2-meter hole in the grating beneath the reactor pressure vessel (1 meter-square hole found in grating):

Radiation level at Fukushima reactor highest since 2011 disaster; grating hole found. The Mainichi, February 2, 2017, http://mainichi.jp/english/articles/20170202/p2g/00m/0dm/087000c

TOKYO (Kyodo) — The radiation level inside the containment vessel of the No. 2 reactor at the crippled Fukushima Daiichi nuclear complex stood at 530 sieverts per hour at a maximum, the highest since the 2011 disaster, the plant operator said Thursday.

Tokyo Electric Power Company Holdings Inc. also announced that based on image analysis, a hole measuring 2 meters in diameter has been found on a metal grating beneath the pressure vessel inside the containment vessel and a portion of the grating was distorted.

…The hole could have been caused by nuclear fuel that penetrated the reactor vessel as it overheated and melted due to the loss of reactor cooling functions in the days after a powerful earthquake and tsunami on March 11, 2011 hit northeastern Japan.

According to the image analysis, about 1 square meter of the grating was missing.

…Images captured using a camera attached to a telescopic arm on Monday also showed part of the grating has gone. A further analysis of the images found a 2-meter hole in an area beyond the missing section on the structure.

A separate article published in The Asahi Shimbun notes that radiation levels in units 1 and 3 remain so high (higher than unit 2) that TEPCO is unable to investigate conditions in there:

MASANOBU HIGASHIYAMA (January 31, 2017) Images indicate bigger challenge for TEPCO at Fukushima plant. The Asahi Shimbun,http://www.asahi.com/ajw/articles/AJ201701310073.html

If confirmed, the first images of melted nuclear fuel at the Fukushima No. 1 nuclear plant show that Tokyo Electric Power Co. will have a much more difficult time decommissioning the battered facility.

The condition of what is believed to be melted fuel inside the No. 2 reactor at the plant appears far worse than previously thought.

…High radiation levels have prevented workers from entering the No. 2 reactor, as well as the No. 1 and No. 3 reactors at the plant.

If radiation levels are at 530 sieverts an hour inside unit 2, I wonder what conditions are like in the 1 and 3 reactors, which are described as even hotter?

I can tell you from watching the reactors on the webcams for 5 plus years that atmospheric emissions from unit 3 have never ceased (as illustrated below far right side of screenshot):

Feb 2, 2017 23:20
index.png
http://majiasblog.blogspot.fr/2017/02/fukushima-daiichi-unit-2-measures-530.html

February 5, 2017 Posted by | Fukushima 2017 | , , | Leave a comment

Recently Found Fukushima Daiichi’s Reactor 2 High Level of Radiation Does not Mean Radiation Increase

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There is some dispute about the recent high level of radiation measured inside the Fukushima Daiichi reactor 2, thanks to the Japan Times unprecise english translation of the Kyodo News Japanese language article.

They have been able to measure these highest radiation levels only now because they couldn’t get as close to where they think the melted fuel may be with monitors before. Not the highest levels ever present at the site. That would have been around the time of the accident, or soon after. The radiation levels at the site do not appear to be rising, they are just now able to get deeper inside the reactor containment before the monitors fail, and so they get better readings.

feb-2-2017-6

 

The unprecise english translation of the Kyodo News Japanese language article published by the Japan Times opened the door to possible misconstruction of the real facts by other media, western media and websites relying on that Japan Times article. http://www.japantimes.co.jp/news/2017/02/03/national/fukushima-radiation-level-highest-since-march-11/#.WJY4ffLraM_

The Japan Times article’s title is ok: “Highest radiation reading since 3/11 detected at Fukushima No. 1 reactor”. Yes, it is the highest radiation reading found since 3/11 because since 3/11 Tepco had not been able to reach such deep place to measure the radiation there. So this recent reading is the highest found since 3/11.

The Japan Times article in itself does not mention directly any radiation increase or “spike. But their wording “has reached” in “The radiation level in the containment vessel of reactor 2 at the crippled Fukushima No. 1 power plant has reached a maximum of 530 sieverts per hour, the highest since the triple core meltdown in March 2011, Tokyo Electric Power Co. Holdings Inc. said” could be misconstrued as meaning that the high level recently found is resulting from an increase of radiation, when compared to the lower level previously found . Which is not the case. Their previous reading was lower because they had not been able to go that deep before to monitor radiation there.

The Japan Times article then misled some western media, such as the Guardian, Popular Mechanic and others to themselves publish misconstrued articles based on the Japan Times article as their source.

The Popular Mechanics article’s title was ok: “Highest Radiation Levels Since Meltdown Recorded at Fukushima” but their subtitle is entirely wrong and misleading: “Levels haven’t been this high since the actual meltdown in 2011.” That subtitle is wrong, the levels were maybe that high or even higher, but Tepco had not been able to reach there before to find out, to take such measure in that place, at that deep level. That subtitle is wrong, suggesting that there is an increase. Popular Mechanics misconstrued the article of Japan Times and drawed the wrong conclusion. http://www.popularmechanics.com/technology/infrastructure/a25034/radiation-spikes-fukushima-possible-breach/

The Guardian ‘s article title is in itself misleading: ” Fukushima nuclear reactor radiation at highest level since 2011 meltdown”. A title such as “Fukushima nuclear reactor radiation highest level to date found since 2011 meltdown” would have been better and more accurate. The added words “to date found” would clarify that it was maybe already there before but that it had not been found yet, because they had not been able to reach that place and that deep before to take such measure. In its text it fails to mention the real reason why the measure recently found is higher than the previous measure. This all results in the Guardian article saying that this highest recent measure compared to the lower previous one is due to an increase of radiation. This is absolutely wrong, a complete misconstruction of the real facts. https://www.theguardian.com/environment/2017/feb/03/fukushima-daiichi-radiation-levels-highest-since-2011-meltdown?CMP=share_btn_fb

And many other western media and websites went along and repeated the same blind misconstruction.

Thanks heavens there were two websites who noticed the error made by those mainstream media and many other websites. They stepped in trying to correct that misconstruction and to re-establish the true facts. The Simply Info Fukuleaks website and the Safecast website, thanks to both websites’ bloggers team for their vigilance and their efforts in keeping the facts straight.

No, Fukushima Daiichi Did Not See A Radiation Spike http://www.fukuleaks.org/web/?p=16094

No, radiation levels at Fukushima Daiichi are not rising http://blog.safecast.org/2017/02/no-radiation-levels-at-fukushima-daiichi-are-not-rising/

We can’t say that there has been an increase in radiation because we do not know that. To know that we would need to have a previous measure at the same deep at the same place to compare both measures. But such previous measure that deep at that place we do not have, so it is impossible to draw any conclusion at this stage, only that it is very high.

Now what we really need is a second probe at the same deep at the same place, to confirm the first probe readings, but also to compare the recent readings and the next readings so as to assess if the radiation levels there are stable or not, if there will be an increase of radiation between the two probes or not…Until such second probing takes place, at this stage no one can say anything about any occuring increase…

feb-3-2017-2

 

For more information: TEPCO Reports:

Pre-investigation results of the area inside the pedestal for the Unit 2 Primary Containment Vessel Investigation at Fukushima Daiichi Nuclear Power Station(examination results of digital images)

Images Inside Fukushima Daiichi Unit 2 Need Further Examination Including The Possibility Of Fuel Debris

TEPCO Photos:

http://photo.tepco.co.jp/en/index-e.html

http://photo.tepco.co.jp/en/date/2017/201702-e/170202-01e.html

http://photo.tepco.co.jp/en/date/2017/201701-e/170130-01e.html

Video here: NHK Video (in Japanese)

 

 

February 5, 2017 Posted by | Fukushima 2017 | , , | Leave a comment

Record high fatal radiation levels, hole in reactor 2 detected

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Deadly radiation estimated inside reactor vessel

The operator of the crippled Fukushima Daiichi nuclear plant says its latest estimation of the radiation level inside one of the reactors was extremely high and had the potential to be lethal to a human within a short period of time.

Tokyo Electric Power Company conducted an inspection inside the containment vessel of the plant’s No.2 reactor last month using a remote-controlled camera, as part of a survey to scrap the reactor.

An analysis of the images found that the radiation was up to 530 sieverts per hour at a concrete cylinder supporting the reactor.

The level is enough to be lethal to a human within a short period of time, despite a possible error margin of up to 30 percent.

A survey conducted 1 year after the nuclear accident at a different part inside the same containment vessel logged 73 sieverts per hour.

In the latest estimation inside the vessel, the area near its opening logged 50 sieverts per hour at maximum.

The operator officials say that there are no leaks of gas with radioactive substances from the containment vessel.

Officials suspect that fuel debris; a mixture of nuclear fuel and melted parts of the reactor’s facility, may be emitting strong radiation inside the vessel.

Some molten fuel penetrated the reactor’s bottom and has reached the containment vessel as fuel debris.

The company plans conduct further inspections with a robot. There is a risk that some parts of the grating where the robot will be moving may be damaged by the high heat of the molten fuel.

https://www3.nhk.or.jp/nhkworld/en/news/20170202_31/

Record high fatal radiation levels, hole in reactor detected at crippled Fukushima nuclear facility

Record high radiation levels that’s lethal even after brief exposure have been detected at a damaged reactor at the Fukushima power plant in Japan. Specialists also found a hole, likely caused by melted nuclear fuel.

Radiation levels of up to 530 Sieverts per hour were detected inside an inactive Reactor 2 at the Fukushima Daiichi nuclear complex damaged during the 2011 earthquake and tsunami catastrophe, Japanese media reported on Thursday citing the plant operator, Tokyo Electric Power Company (TEPCO).

A dose of about 8 Sieverts is considered incurable and fatal.

A hole of no less than one square meter in size has also been discovered beneath the reactor’s pressure vessel, TEPCO said. According to researchers, the apparent opening in the metal grating of one of three reactors that had melted down in 2011, is believed to be have been caused by melted nuclear fuel that fell through the vessel.

The iron scaffolding has a melting point of 1500 degrees, TEPCO said, explaining that there is a possibility the fuel debris has fallen onto it and burnt the hole. Such fuel debris have been discovered on equipment at the bottom of the pressure vessel just above the hole, it added.

The latest findings were released after a recent camera probe inside the reactor, TEPCO said. Using a remote-controlled camera fitted on a long pipe, scientists managed to get images of hard-to-reach places where residual nuclear material remained. The substance there is so toxic that even specially-made robots designed to probe the underwater depths beneath the power plant have previously crumbled and shut down.

However, TEPCO still plans to launch further more detailed assessments at the damaged nuclear facility with the help of self-propelled robots.

 

Earlier this week, hopes for a more efficient cleanup at Fukushima were high, as the plant operator announced a portion of nuclear fuel debris responsible for a lot of the lingering contamination from six years ago may have finally been found.

https://www.rt.com/news/376107-fukushima-record-radiation-level/

February 3, 2017 Posted by | Fukushima 2017 | , , , | Leave a comment