• Blog Stats

    • 73,666 hits
  • Archives

  • Enter your email address to subscribe to this blog and receive notifications of new posts by email.

    Join 152 other followers

  • Copyright notice

    This blog entry and all other text on this blog is copyrighted, you are free to read it, discuss it with friends, co-workers and anyone else who will pay attention.

    If you want to cite this blog article or quote from it in a not for profit website or blog then please feel free to do so as long as you provide a link back to this blog article.

    If as a school teacher or university teacher you wish to use content from my blog for the education of students then you may do so as long as the teaching materials produced from my blogged writings are not distributed for profit to others. Also at University level I ask that you provide a link to my blog to the students.

    If you want to quote from this blog in an academic paper published in an academic journal then please contact me before you submit your paper to enable us to discuss the matter.

    If you wish to reuse my text in a way where you will be making a profit (however small) please contact me before you do so, and we can discuss the licensing of the content.

    If you want to contact me then please do so by e-mailing me at Chalmers University of Technology, I am quite easy to find there as I am the only person with the surname “foreman” working at Chalmers. An alternative method of contacting me is to leave a comment on a blog article. If you do not know which one to comment on then just pick one at random, please include your email in the comment so I can contact you.

Radiation levels in Japan

Dear All

Here is a link to a site which gives details of the radiological situation in Japan

http://www.slideshare.net/iaea/technical-briefing-on-theradiological-situation-in-japan-renate-czarwinski-18th-march-2011

Ido not think that the radiation level in the cities is not able to cause the so called “radiation sickness”, the dose rates in the cities is higher than normal but it is not an immediate threat to life.

Most of the time in Ibaragi (120 km SW of the plant), Togichi (140 km SW of the plant), Chiba (218 km SW of the plant), Tokyo (230 km SW of the plant) the dose rate has been below 0.3 micro sievert per hour, even if the dose rate was to stay at 1 micro sievert per hour for ever then it would take about 42 days for the dose experienced by the general public to reach their UK occupational limits for one year. But going over the UK occupational limit for the general public does not condemn a person to a certain horrible death.

It would take 2 years and 100 days at that dose rate to reach the one year occupational limit (20 mSv) for a radiation worker. This is a dose which would not cause a serious short term injury or disease. The risk of getting cancer from a 20 mSv dose is 0.1 %. This is not a large chance of cancer. This is based on the assumption that a person has a 5% chance of getting cancer as a result of a 1 sievert dose.

I have checked the details for the reactor site, the radiation level close to the edge of the site is higher than normal. The dose rate close to the fence does in my view justify the evacuation of the general public.

Advertisements

Go on, Have your say !

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: