Skip to main content

TEPCO still working on plan to end Japan nuclear crisis

http://af.reuters.com/article/worldNews/idAFTRE72A0UU20110413?sp=true

By Taiga Uranaka and Chisa Fujioka

TOKYO (Reuters) - The operator of Japan's crippled nuclear plant said on Wednesday it was still working on a detailed plan to end the country's nuclear crisis a month after it began, as tests showed radiation levels in the sea near the complex had spiked.

Engineers moved a step closer to emptying highly radioactive water from one of the six crippled reactors, which would allow them to start repairing the cooling system crucial to regaining control of the reactors.

Japan's nuclear safety agency said the latest tests showed radiation nearly doubled last week, to 23 times above legal limits, in the sea off Minamisoma city near the plant.

Radiation in Tokyo, 240 km (150 miles) from the plant, had fallen to pre-disaster levels on Tuesday, the science ministry said late on Wednesday.

A series of strong aftershocks this week has rattled eastern Japan, slowing the recovery effort at the Fukushima Daiichi plant due to temporary evacuations of workers and power outages.

The beleaguered president of operator Tokyo Electric Power Co (TEPCO) said the situation at the nuclear plant, wrecked by a 15-metre tsunami on March 11, had stabilised.

But TEPCO president Masataka Shimizu said the firm was still preparing a blueprint to end the crisis, now rated on a par with the world's worst nuclear accident, the 1986 Chernobyl disaster.

"As instructed by Prime Minister Kan we are working out the specific details of how to handle the situation so they can be disclosed as soon as possible," a relaxed-looking Shimizu told a news conference in Tokyo.

Shimizu has been largely absent from the recovery operation, spending time in hospital and only visiting the area on Monday. He refused to comment on public calls for his resignation, and again apologised to the Japanese people for the crisis.

"We are making the utmost effort to bring the reactors at Fukushima Daiichi to a cold shutdown and halt the spread of radiation," he said.

ANGRY PROTESTS

TEPCO's Tokyo head office has been the target of angry protests over the nuclear crisis and authorities took no chances on Wednesday, with riot trucks and security officers guarding the front gate during the news conference.

Latest data shows much more radiation leaked from the Daiichi plant in the early days of the crisis than first thought, prompting officials to rate it on a par with the Chernobyl disaster.

But experts were quick to point out the two crises were vastly different in terms of radiation contamination, and on Wednesday, Russia's nuclear chief said Japan was exaggerating the scope of the disaster.

"It is hard for me to assess why the Japanese colleagues have taken this decision. I suspect, this is more of a financial issue, than a nuclear one," Sergei Kiriyenko said on the sidelines of a meeting of major economies in southern China.

There have been fears of contamination among Japan's neighbours, but China said the impact there had been small, noting the radiation was just 1 percent of what it had experienced from Chernobyl.

The toll of the disaster is rising. More than 13,000 people have been confirmed dead, and on Wednesday the government cut its outlook for the economy, in deflation for almost 15 years, for the first time in six months.

"The biggest risks, or uncertain factors for the economy, are when power supplies will recover, whether the nuclear situation will keep from worsening," Economics Minister Kaoru Yosano said.

The total cost of the triple catastrophe has been estimated at $300 billion (184.4 billion pounds), making it the world's most costly natural disaster. TEPCO said it was working on a compensation plan.

The Yomiuri newspaper reported on Wednesday that the government may cap TEPCO's liability to as little as $24 billion for damages. Bank of America-Merrill Lynch has estimated compensation claims of more than $130 billion.

SEAWATER RADIATION SPIKE

Radiation readings in seawater near the crippled plant spiked last week, Japan's Nuclear and Industrial Safety Agency (NISA) said on Wednesday.

Seawater samples collected on Monday from around 15 km (9 miles) off the coast of Minamisoma city showed radiation in the water rose to 23 times the legal limit from 9.3 times on April 7, said Hidehiko Nishiyama, a NISA deputy director-general.

He later said NISA had asked TEPCO to assess the quake resistance of the buildings, and to look into how they could be reinforced against aftershocks.

"We need to think about how these aftershocks are affecting the buildings, which are already damaged," he said.

Japan has expanded the 20 km (12 miles) evacuation zone around the plant because of high accumulated radiation.

No radiation-linked deaths have been reported and only 21 plant workers have been affected by minor radiation sickness.

Still, the increase in the severity level heightens the risk of diplomatic tension with Japan's neighbours over radioactive fallout. Chinese Premier Wen Jiabao told Kan on Tuesday he was "concerned" about the release of radiation into the ocean.

"Its impact on our country's environment has been small, equivalent to about 1 percent of the impact of the Chernobyl nuclear accident on our country," China's nuclear safety body said on Wednesday.

"There is no need to adopt protective measures."

(Additional reporting by Mayumi Negishi, Yoko Nishikawa, Kiyoshi Takenaka, Kazunori Takada, Shinichi Saoshiro in Tokyo and Alexei Anischuk in Sanya, China; Writing by Michael Perry and Daniel Magnowski; Editing by Sanjeev Miglani)

(Corrects 'recession' to 'deflation')

Comments

Popular posts from this blog

The Difference Between LEGO MINDSTORMS EV3 Home Edition (#31313) and LEGO MINDSTORMS Education EV3 (#45544)

http://robotsquare.com/2013/11/25/difference-between-ev3-home-edition-and-education-ev3/ This article covers the difference between the LEGO MINDSTORMS EV3 Home Edition and LEGO MINDSTORMS Education EV3 products. Other articles in the ‘difference between’ series: * The difference and compatibility between EV3 and NXT ( link ) * The difference between NXT Home Edition and NXT Education products ( link ) One robotics platform, two targets The LEGO MINDSTORMS EV3 robotics platform has been developed for two different target audiences. We have home users (children and hobbyists) and educational users (students and teachers). LEGO has designed a base set for each group, as well as several add on sets. There isn’t a clear line between home users and educational users, though. It’s fine to use the Education set at home, and it’s fine to use the Home Edition set at school. This article aims to clarify the differences between the two product lines so you can decide which...

Let’s ban PowerPoint in lectures – it makes students more stupid and professors more boring

https://theconversation.com/lets-ban-powerpoint-in-lectures-it-makes-students-more-stupid-and-professors-more-boring-36183 Reading bullet points off a screen doesn't teach anyone anything. Author Bent Meier Sørensen Professor in Philosophy and Business at Copenhagen Business School Disclosure Statement Bent Meier Sørensen does not work for, consult to, own shares in or receive funding from any company or organisation that would benefit from this article, and has no relevant affiliations. The Conversation is funded by CSIRO, Melbourne, Monash, RMIT, UTS, UWA, ACU, ANU, ASB, Baker IDI, Canberra, CDU, Curtin, Deakin, ECU, Flinders, Griffith, the Harry Perkins Institute, JCU, La Trobe, Massey, Murdoch, Newcastle, UQ, QUT, SAHMRI, Swinburne, Sydney, UNDA, UNE, UniSA, UNSW, USC, USQ, UTAS, UWS, VU and Wollongong. ...

Logic Analyzer with STM32 Boards

https://sysprogs.com/w/how-we-turned-8-popular-stm32-boards-into-powerful-logic-analyzers/ How We Turned 8 Popular STM32 Boards into Powerful Logic Analyzers March 23, 2017 Ivan Shcherbakov The idea of making a “soft logic analyzer” that will run on top of popular prototyping boards has been crossing my mind since we first got acquainted with the STM32 Discovery and Nucleo boards. The STM32 GPIO is blazingly fast and the built-in DMA controller looks powerful enough to handle high bandwidths. So having that in mind, we spent several months perfecting both software and firmware side and here is what we got in the end. Capturing the signals The main challenge when using a microcontroller like STM32 as a core of a logic analyzer is dealing with sampling irregularities. Unlike FPGA-based analyzers, the microcontroller has to share the same resources to load instructions from memory, read/write th...