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Título: Mapas y enlaces sobre Fukushima disaster

Texto del artículo:

http://tori.ils.uec.ac.jp/TORI/index.php/Fukushima_disaster

# Fukushima disaster

Fukushima disaster is the catastrophe 2011 March 11 at the Fukushima nuclear plant (Japan),
coordinates [141.032917, 37.422972].
The catastrophe was caused by the series of the earthquakes in March 11 (estimated to have magnitude 8.9 by the Richter's scale) followed by the series of tsunami. The strong tsunami had destroyed the generators of cooling system of the reactors, causing explosions of some of them within a week after the earthquake.
Wide radioactive contamination of the Honshu iceland (see the pic) is usually attributed to
this catastrophe. During a month, the rank of the catastrophe raised up since 3 to 5 and then to 7; since 2011 April it is qualified with rank 7, the same as the Chernobyl disaster. In 2011 April, the level of radiation slows down; no future increase of the rank is expected.

[hide]

## Inetrpretation in the publications

Explosion March 14

At the beginning of the earthquake, 2.46pm local time on March 11, 2011, all the reactors in Japan were quickly shut-down. After such an emergency stop, the reactor requires the forced cooling during several days, consuming the electric power. Such a cooling was arranged by special water-pumps and the emergency back-up generators. These generators were destroyed by the tsunami followed the earthquake. The mobile generators were sent, but their power is lower, than that the damaged back-up generators were supposed to provide. This caused lack of the cooling water pumped in to the hot cores of the reactors that caused the partial destruction of some of them, causing the series of explosions during a week after the earthquake. The smoke after that in March 14 is shown at the picture at right.
The lack of information about the events at Fukushima and hiding of information about the contamination by the Japanese authorities provoked very pessimistic estimates; the scale of the catastrophe is considered similar to that due to the Chernobyl disaster
[3][4][5] or even worse [6][7][8][9].
Some 170,000 people have been ordered to evacuate the area covering a radius of 20 kilometers around the plant. After a month, the evacuation zone had been extended to 30km. April 11, the severity rate is raised to 7, setting the accident to the same scale as the Chernobyl disaster [10].
Certain doubts are expressed if the operators of the station did their best while the catastrophe was unfolding

[11]; the government is also criticized for hiding of the information about the catastrophe[12].

## Above the ground

All the reactors at Fukushima are built-up above the ground. Past century, Nobel laureate Andrei Sakharov had told, that
the above–ground nuclear reactors should be prohibited by the special law

[13]; up to year 2011, such reactors are not yet prohibited.
Until the 2011 March, many people in the Fukushima prefecture believed that the reactors are safe.
The Fukushima catastrophe may be one additional important argument to push forward the prohibition of the above-ground reactors.

## Robots

The journalists try to understand: why the country (which is most advanced in the industry of robots) had to send the workers-kamikaze to cool the reactors, instead of to send robots
[14][15][16].
According to publications, no one robot took part in the cooling of the reactor, although some attempts to use a robot for the automatic registration of radiation are discussed

[17][18].

## Lack of information

As in the case of the Chernobyl disaster, the hiding of the information about the level of contaminaiton was the strongest warning about the danger. Correspondents of the Washington Post had mentioned that the representatives of the Tokyo Electric Company had revealed almost no information on the things that are happening [19][20].

2011 April 6, Sebastian Pflugbeil had expressed very negative opinion about the ability of the Japanese officials to provide the adequate information about the Fukushina's catastrophe
[9]. During a month, these officials could not estimate even the order of magnitude of the amount of unstable isotopes released
[10].

contamination in Tokyo 2011 March 14-19

March 18, some data about the contamination were released
[21] by the Government. Soon, the site of newspaper Mainichi had released the map
[22],
where at some cities (except Sindai and Fukushima) the data about radiation are printed; these data are used to make the fit shown at the top. However, the units of measurement are not clearly specified in this map, this makes difficulties in the comparison of data [22] by Mainichi to the data

[21] by the Government.
The qualitative agreement takes place under assumption that the numbers at the Mainichi map mean amount of mS/year, while the data government use the unit $\mu$Sv/hour.

At the beginning of 2011 April, with enormous efforts by the emergency workers, the cooling of the reactors seems to be arranged; the situation seems to be stabilized at some intermediate level of emergency
[23][24][23], but
the officials from TEPCO and government have lost the fiance of the people [25][26].
The official maps with lines of constant level of radiation were not published, and the dangerous zone is still (beginning of April, 2011) considered as a circle (of radius of 30 km) centered at the Fukushima Daichi nuclear plant. The fit a the top figure cannot be considered as an official release. The information about the radiation at Sendai ( ??? ) seems to be intentionally hidden. The hiding of the information about the disaster caused many foreign workers to leave from the country [26][27].

Some maps of contamination were provided by Declan Butler [28]
and then by the Jonocelyn Kaiser
[2]
but neither by the Japanese government, nor by the TEPKO (who were expected to handle the case). As in the case of the USSR (Chernobyl, 1986), the citizen have to get information about events happening in their own country from the foreign publications.

The data by "Nature" and "Science Insider" data could be used to correct the approximation of data by Mainichi, shown in the top figure, but the calibration is necessary to avoid effects of the observational selection: the data by Mainichi[22] lack the description of the methodic of evaluation.

## Discrepancy in the data

The scale of the disaster due to Fukushima happens to be much lower than that in the estimates
[4][5][6][7]

(and in particular, much lower than that due to the Chernobyl disaster);
the main leaks of radiation seem to be fixed [23][24]. The nuclear fuel is supposed to remain in the confinement vessels, not burn up to the atmosphere, as in the case of Chernobyl. The question arises about the source of the contamination registered in the USA, Canada and other countries. Two hypothesis are described in the articles
Who contaminates Japan and Russia used the nuclear weapon in 2011. Each of them can be considered as a kind of a conspiration theory, although the ways to check (to confirm or to negate) these hypothesis are suggested, and for beginning of 2011 April, no other explanation of the strong disagreement in the estimates of the level of contamination seem to be available.

None of the hypothesis mentioned above explains the apparent hiding of the information about radioactive contamination by the Japanese authorities. The detailed map of the contamination (similar to or better than that shown at the top figure) for 2011 March 11-21, as well as for the 2011 April would be the good answer.

The main question is: why the contamination registered at the USA coast allowed to compare the scale of the catastrophe to that due to the Chernobyl disaster, if no boiling of nuclear fuel into the atmosphere was reported at the Fukushima; and where is main source of the contamination? The fit of data by Mainichi suggests that the main trend of the contamination does not go through the Fukushima nuclear plant, although perhaps goes through the epicenter of the earthquake of March 11 and through the Shikotan island (that currently is controlled by the Russian military troops).

In the later maps of the contamination, say, since 2011 April, the main spot of contamination seem to be at Fukushima-1; then it seems to be dominant source of radioactivity.

## Questions

Several other questions are formulated about this accident. 2011 March 19, the link to the questions below has been uploaded to the the Cabinet of the Prime Minister of Japan, at the section about the Countermeasures for the Great East Japan Earthquake [29].
questions have been moved to Fukushima disaster, questions; some of them are already with answers there.

## References

1. ?
http://mainichi.jp/select/weathernews/news/images/20110323k0000m040088000p_size8.jpg
Mainichi. Table of contamination for 2011 March 14–21. (In Japanese)

2. ? 2.0 2.1 http://news.sciencemag.org/scienceinsider/2011/04/a-map-of-fukushimas-radiation.html?ref=hp Jocelyn Kaiser. A Map of Fukushima's Radiation Risks. 22 April 2011, 11:17 AM, Data by DOE

3. ?
http://www.cbc.ca/news/world/story/2011/03/12/earthquake-japan-nuclear-explosion.html
Partial meltdown likely: Japanese official. The Associated Press Posted: Mar 12, 2011
A partial meltdown was likely under way at a second nuclear reactor...
Some 170,000 people have been ordered to evacuate the area covering a radius of 20 kilometres..
Chief Cabinet Secretary Yukio Edano said operators released slightly radioactive air from Unit 3 Sunday, while injecting water into it as an effort to reduce pressure and temperature to save the reactor from a possible meltdown...

4. ? 4.0 4.1 http://www.newscientist.com/article/dn20285-fukushima-radioactive-fallout-nears-chernobyl-levels.html Debora MacKenzie. Fukushima radioactive fallout nears Chernobyl levels. 17:14 24 March 2011.

5. ? 5.0 5.1
http://www.themoneyparty.org/main/?p=1519 Michael Collins. Fukushima radioactive fallout nears Chernobyl levels. 2011 March 25.

6. ? 6.0 6.1
http://www.novinite.com/view_news.php?id=126888 Russian Expert: Fukushima Disaster Greater Than Chernobyl World | April 2, 2011, Saturday ...
nuclear engineer Nataliya Mironova

7. ? 7.0 7.1 http://rus.ruvr.ru/2011/03/18/47628439.html ?????? ????????. ???????? ?? ???????? ??? ???????? ?????????. 18.03.2011, 18:16. (in Russian)

8. ?
http://www.ruskline.ru/news_rl/2011/03/14/konec_yaponskogo_chuda/ ????? ????????? ???????. ????? «????????? ????». 14.03.2011. ... ??????????? ??? ??????? ????, ? ???? ?????, ?? ????????????, ??????????, ??? ???????? ????????? ????????? ? ?????? ???? ????????? ???? ?????? ?? ??????????? ?????? ?????????.... ???????? ?????????? ? ???? ??? ????? ???????? ? ????? ?????? ????? ????????? ?????... (in Russian)

9. ? 9.0 9.1
http://www.mcot.net/cfcustom/cache_page/192061.html
Int'l conference on Chernobyl opens in Berlin. BERLIN, April 7 (Itar-Tass) -- Participants in an international conference on the 25th anniversary of the Chernobyl nuclear power plant disaster that opened in Berlin on Wednesday, April 6, discussed the impact of radiation on human health...
President Sebastian Pflugbeil said the situation at Fukushima-1 differed from that at Chernobyl where an explosion had occurred followed by an immediate release of radiation. In Japan, things are happening gradually but the level of radioactivity at the six Japanese reactors is higher than that at Chernobyl... Pflugbeil expressed regret that Japan's information policy in connection with the nuclear accident does not differ from that of the Soviet authorities during the Chernobyl disaster.

10. ? 10.0 10.1 http://www.washingtonpost.com/world/japan-to-raise-rating-of-nuclear-crisis-to-highest-level/2011/04/11/AFxrFEND_story.html Chico Harlan. Japan rates nuclear crisis at highest severity level. Monday, April 11, 10:22 PM.TOKYO — Japanese authorities raised Tuesday their rating of the severity of the Fukushima Daiichi nuclear crisis to the highest level on an international scale, equal to that of the 1986 Chernobyl disaster.

11. ?
http://online.wsj.com/article/SB10001424052748703922504576273234110896182.html
PHRED DVORAK. Reactor Team Let Pressure Soar. APRIL 23, 2011.
Japanese nuclear-power companies are so leery of releasing radiation into the atmosphere that their rules call for waiting much longer and obtaining many more sign-offs than U.S. counterparts before venting the potentially dangerous steam that builds up as reactors overheat, a Wall Street Journal inquiry found...
The controversy has reached Japan's embattled Prime Minister Naoto Kan. Shortly after 7 a.m. that same morning, Mr. Kan paid a 50-minute visit to the Fukushima Daiichi grounds and held a meeting there with plant executives. Opposition lawmakers have argued that his visit distracted plant managers, while Mr. Kan's supporters say he pushed to accelerate venting...

12. ?
http://kuwaitsamachar.com/index/news/japanese-plant-starts-installation-filters
Japanese plant starts installation of filters. 2011-May-03.
..
Ministry of Economy, Trade and Industry disclosed that 68 of its former senior officials have ended up working for power companies in the past 50 years, illustrating a close relationship between the regulatory body and the industry, and raising suspicion that regulatory failure could be partly responsible for the latest nuclear disaster...
The government continues to face criticism after the resignation of a key nuclear adviser Saturday over disagreements on information disclosure and radiation exposure limits..
..The resigned government adviser, Toshiso Kosako, criticized the government for failing to abide by its own rules requiring the disclosure of forecasts based on potential scenarios.

13. ?
http://www.sakharov-archive.ru/Raboty/Rabot_22.htm ?. ?. ???????. ??????????? ? ??????? ?. ????????? «????????????? ???????» ..????? ? ???????, ??? ??????? ?????????? ?????????? ???????????? ? ?????? ???????????, ?? ?????? ? ???????? ??????????? ?????? ????????????, ??? ??????? ??????? ?????????? ????????? ??? ??????. ????? ????????????? ?????, ??????????? ???????? ???????????? ?????????. ??????? ??????. (in Russian)

14. ? http://www.newser.com/story/114384/japan-robots-where-are-they-amid-this-nuclear-disaster.html Nick McMaster. Japan Has Robots All Over —Except Nuke Plant. Mar 17, 2011 2:32.

15. ?
http://www.boingboing.net/2011/03/17/japan-nuclear-crisis-1.html Maggie Koerth-Baker. Japan nuclear crisis: Where are the robots? 10:22 AM Thursday, Mar 17, 2011.

16. ?
http://www.telegraph.co.uk/news/worldnews/asia/japan/8388394/Japan-earthquake-no-place-for-robots-as-human-heroes-stave-off-meltdown.html John Bingham. 5:29PM GMT 17 Mar 2011. It has built robots to take the place of chefs, concert pianists and even sumo wrestlers but when it comes to the perilous task of staving off nuclear disaster Japan has been left relying on human efforts.

17. ?
http://www.scientificamerican.com/article.cfm?id=robots-arrive-fukushima-nuclear
Larry Greenemeier. Robots Arrive at Fukushima Nuclear Site with Unclear Mission.
March 24, 2011. Mitsui's 600-kilogram Moni-Robo is reportedly on site at Daiichi.

18. ?

http://www.yomiuri.co.jp/dy/national/T110502002997.htm
Yomiuri Shinbun. Unmanned machines enlisted at N-planr. Yomiuri, 2011 May 3.

19. ? http://www.washingtonpost.com/business/economy/nuclear-crisis-deepens-as-third-reactor-loses-cooling-capacity/2011/03/14/ABk6rQV_story_1.html Brian Vastag and Chico Harlan. New fire reported at nuclear plant as Japan races to avert catastrophe. Tuesday, March 15, 6:41 PM .. NHK television reported that the Japanese government had ordered the country’s 47 prefectures to publicly report recorded radiation levels twice a day... Higher-than-normal radiation levels were detected in Tokyo, roughly 150 miles from Fukushima.. In Ibaraki, roughly 70 miles from Tokyo, levels were briefly 100 times the normal measure, according to the Kyodo news agency.. Amid the four-day-long emergency at the Fukushima Daiichi plant, Japan’s public has grown skeptical about the reliability of official information, criticizing Tokyo Electric officials in particular for their vague answers during news conferences.// Kan himself was not briefed on the Tuesday morning explosion until after it had been reported on television. According to a Kyodo reporter who overheard the conversation, Kan later grilled the company representatives, asking, “What the hell is going on?”// During a midmorning news conference, four Tokyo Electric officials revealed almost no information about the blast.

20. ?
http://www.washingtonpost.com/world/anxious-foreigners-flee-japan/2011/03/15/ABrlvnW_story.html Rick Maese and Erin Cox. Anxious foreigners flee Japan. Tuesday, March 15, 10:14 PM The lack of information — or the unreliability of it — has frustrated not only citizens, but also foreigners who call Japan home.

21. ? 21.0 21.1
Table of contamination for 2011 March 16-17, in Japanese.

22. ? 22.0 22.1 22.2
http://mainichi.jp/select/weathernews/news/images/20110323k0000m040088000p_size8.jpg

Map of contamination for 2011 March 14-21, in Japanese.

23. ? 23.0 23.1 23.2 http://www.iaea.org/newscenter/news/tsunamiupdate01.html Fukushima Nuclear Accident Updates of 6 April 2011. At 6:07 UTC, 5 April coagulation agents (liquid glass) were injected into the holes drilled around the pits. The leakage was reported to have ceased at 20:38 UTC on April 5. Work continues to prevent further releases to the sea.

24. ? 24.0 24.1

http://in.reuters.com/article/2011/04/07/idINIndia-56176220110407 Japan's nuclear crisis. Thu Apr 7, 2011 8:41am IST. The head of a U.N. Scientific body says the situation at the plant is not expected to have any serious impact on people's health.

25. ?
http://www.washingtonpost.com/world/peace-of-mind-livelihood-gone-for-japanese-dairy-farmers-near-evacuation-zone/2011/04/01/AFxieedC_story.html
Andrew Higgins. Peace of mind, livelihood gone as Japanese city withers in shadow of nuclear plant. April 4, 2011.
...Radiation data released daily by the regional government, however, show just how difficult it is to work out who is and who isn’t at risk. Fukushima City, the regional capital, is much farther from Fukushima Daiichi than Minami Soma but has far higher radiation readings. The level of hazard depends not just on distance but a host of often inscrutable factors such as local topography and wind patterns... The danger may or may not be grave, but one thing is certain: Confusing and often contradictory announcements by jittery officials in Tokyo and shifty obfuscation by Tokyo Electric Power Co. executives have already stripped the Okubos of their livelihood, their peace of mind and the fruit of decades of labor...

26. ? 26.0 26.1

Gillian Shaw. Radiation fear drives Richmond family from Sendai home. March 25, 2011.
.. "People have a little bit of distrust for the government," he said. "They don't trust them, they are frustrated with the slow time and the gap in receiving information." ..

27. ?
Industries left short-handed after foreign workers flee Japan following nuke accident. (Mainichi Japan) April 25, 2011.
Tens of thousands of worried foreign workers left Japan shortly after a crisis at the nuclear power plant that was crippled by the March 11 earthquake and tsunami, causing serious labor shortages in some industries.

28. ?
http://blogs.nature.com/news/thegreatbeyond/2011/03/fukushima_update_against_the_o_1.html
Declan Butler. Fukushima update: Recovery efforts stalled, as hotspot concerns grow - March 30, 2011

29. ? http://www.kantei.go.jp/foreign/index-e.html
Countermeasures for the Great East Japan Earthquake.

### Monitoring of contamination in prefectures

http://www.jaea.go.jp/english/index.shtml Japan Atomic energy Agency

http://erms.jaea.go.jp/ monitoring at Tokai section, Ibaraki with wind direction (in Japanese)

http://www.mext.go.jp Monitoring of the contamination (?????) , in Japanese

http://www.bousai.ne.jp/eng/ Current contamination updated

http://www.mext.go.jp/english/incident/1303986.htm
temporal behavior in some cities.

http://park30.wakwak.com/~weather/geiger_index.html Monitoring at Tokyo

http://mextrad.blob.core.windows.net/page/13_Tokyo_en.html for April 2011 indicates $0.09 \mu \rm Sv/h$

http://park30.wakwak.com/~weather/geiger_index.html $15 {\rm CPM} \approx \frac{15}{120}\rm microSievert/hour \approx 0.125 microSievert/hour$.

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