スウエーデンの面白いものたち


by nyfiken
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海外のメデイアの報道問題比較

Good analyse of Fukushima masmedia reports in the world.
Even BBC report on Fukushima was downsized and the report itself was severely critisized.


This time we should review again in fact what really happened on the day. How the report from TEPCO was also downsized as well.

3 nuclear reactors melted down after quake, Japan confirms
NUCLEAR REACTORSJune 06, 2011|By the CNN Wire Staff
An aerial view of the damaged Fukushima Daiichi nuclear power plant.
Japan's Fukushima Daiichi nuclear power plant experienced full meltdowns at three reactors in the wake of an earthquake and tsunami in March, the country's Nuclear Emergency Response Headquarters said Monday.

The nuclear group's new evaluation, released Monday, goes further than previous statements in describing the extent of the damage caused by an earthquake and tsunami on March 11.

The announcement will not change plans for how to stabilize the Fukushima Daiichi plant, the agency said.

Reactors 1, 2 and 3 experienced a full meltdown, it said

'Melt-through' at Fukushima? / Govt report to IAEA suggests situation worse than meltdown

The Yomiuri Shimbun
Nuclear fuel in three reactors at the Fukushima No. 1 nuclear plant has possibly melted through pressure vessels and accumulated at the bottom of outer containment vessels, according to a government report obtained Tuesday by The Yomiuri Shimbun.

A "melt-through"--when melted nuclear fuel leaks from the bottom of damaged reactor pressure vessels into containment vessels--is far worse than a core meltdown and is the worst possibility in a nuclear accident.

The possibility of the situation at the plant's Nos. 1 to 3 reactors was raised in a report that is to be submitted to the International Atomic Energy Agency.

If the report is released as is, it would be the first official recognition that a melt-through has occurred.

It was revealed earlier that sections of the bottom of the pressure vessels where control rods go through have been damaged. Highly radioactive water from inside the pressure vessels was confirmed to have leaked out of the containment vessels, even outside the buildings that house the reactors.

The report also acknowledges problems with the vertical administrative structure concerning nuclear safety regulations. As a result, the report says, who was responsible for keeping people safe in the event of a nuclear accident was not clear.

The report proposes separating the Nuclear and Industrial Safety Agency from the Economy, Trade and Industry Ministry and making it an independent organization. The report also proposes drastic reform of the nation's nuclear administration, including the Nuclear Safety Commission.

===

Vessel damaged 5 hours later

The pressure vessel of the No. 1 reactor at the Fukushima No. 1 nuclear power plant is believed to have been damaged five hours after the March 11 earthquake, according to an analysis by the Nuclear and Industrial Safety Agency.

The finding differs with a provisional analysis earlier released by plant operator Tokyo Electric Power Co., which stated the the pressure vessel was believed to have been damaged 15 hours after the March 11 Great East Japan Earthquake.

On Monday, NISA, a nuclear watchdog body run by the Economy, Trade and Industry Ministry, disclosed the results of a detailed analysis regarding damage at the Nos. 1 to 3 nuclear reactors at the Fukushima facility. NISA estimates that the No. 2 reactor's pressure vessel was damaged 80 hours after the disaster. TEPCO's analysis contends the No. 2 reactor's pressure vessel was damaged 109 hours after the quake.
According to NISA's analysis, the No.1 reactor's core began suffering damage three hours after the earthquake.
The No. 1 reactor's pressure vessel was damaged at 8 p.m. on March 11, five hours after the earthquake. The No. 2 reactor's pressure vessel suffered damage at 10:50 p.m. on March 14, while the No. 3 reactor's pressure vessel suffered damage at 10:10 p.m. on March 14. NISA data showed the pressure vessels at the Nos. 1 and 2 reactors were damaged earlier than TEPCO's analysis showed.

On the other hand, the No. 3 reactor's pressure vessel was found to have been damaged 13 hours later than TEPCO's data showed.

NISA presumed the vessels failed when there was almost no water in the reactor cores of the Nos. 2 and 3 reactors.

(Jun. 8, 2011)

REVIEW ARTICLE
Long-term Radiation-Related Health Effects
in a Unique Human Population:
Lessons Learned from the Atomic Bomb Survivors of Hiroshima and Nagasaki
Evan B. Douple, PhD; Kiyohiko Mabuchi, MD, DrPH; Harry M. Cullings, PhD;
Dale L. Preston, PhD; Kazunori Kodama, MD, PhD; Yukiko Shimizu, PhD;
Saeko Fujiwara, MD; Roy E. Shore, PhD, DrPH
ABSTRACT
For 63 years scientists in the Atomic Bomb Casualty Commission and its successor, the Radiation Effects
Research Foundation, have been assessing the long-term health effects in the survivors of the atomic bombings of Hiroshima and Nagasaki and in their children. The identification and follow-up of a large population (approximatelya total of 200 000, of whom more than 40% are alive today) that includes a broad range of ages and radiation
exposure doses, and healthy representatives of both sexes; establishment of well-defined cohorts whose members have been studied longitudinally, including some with biennial health examinations and a high survivorparticipation
rate; and careful reconstructions of individual radiation doses have resulted in reliable excess relativerisk estimates for radiation-related health effects, including cancer and noncancer effects in humans, for thebenefit of the survivors and for all humankind. This article reviews those risk estimates and summarizes what has been learned from this historic and unique study.
(Disaster Med Public Health Preparedness. 2011;5:S122-S133

In light of that study, it's worth noting that the Japanese government calculated that the Cesium-137 alone emitted from Fukushima as of late August was 168 times more radioactive than the atomic bomb dropped on Hiroshima: http://www.telegraph.co.uk/news/worldnews/asia/japan/8722400/Fukushima-caesiu...


IAEA Report Quoted
http://www-pub.iaea.org/MTCD/meetings/PDFplus/2011/cn200/documentation/cn200_...

NYAS Review (Yablokov et al.) Cited
http://www.strahlentelex.de/Yablokov%20Chernobyl%20book.pdf
by nyfiken | 2012-07-21 10:10