Radiation levels in Japan

Discuss issues that arise in todays world.
Post Reply
User avatar
kowalskil
Junior Member
Posts: 41
Joined: Tue Jan 11, 2011 12:14 am
Location: New Jersey, USA
Political Stand:
Contact:

Radiation levels in Japan

Post by kowalskil » Sun Sep 04, 2011 12:58 am

1) Those interested in recently (?) measured radiation levels (at different distances from the Fukushima reactors in Japan) should see:

 http://www.meti.go.jp/earthquake/nuclea ... r02_01.pdf  
(dose levels measured 1 meter above the ground)

 http://www.meti.go.jp/earthquake/nuclea ... r02_02.pdf
(dose levels measured 1 centimeter above the ground)

Note that the color code is explained near the lower left corner of each dispay. Radiation levels are expressed in micro-Sieverts per hour. [The 10 micro-sieverts, for example, is the same as 0.01 mSv, etc. And 10 micro-Sievert/hour is the same as 0.24 mSv/day, or 7.2 mSv/month.]

2) The effect of penetrating radiation on a person depends on the dose received. The common unit of dose is Sievert (Sv). Smaller doses are expressed in milliseverts (mSv) or microseveret.

A dose of 10 Sv will most likely results in death, within a day or two.
5 Sv would kill about 50% of exposed people.
2 Sv can also be fatal, especially without prompt treatment.

0.25 Sv = 250 mSv is the limit for emergency workers in life-saving operations.
0.10 Sv = 100 mSv dose is clearly linked to later cancer risks.
0.05 Sv = 50 mSv is the yearly limit for radiation workers.

0.004 Sv= 4 mSv typical yearly dose due to natural radiation (cosmic rays, etc).
0.003 Sv= 3 mSV typical dose from mammogram

Ludwik Kowalski (see Wikipedia)
.

User avatar
DodgeFB
Gifted Member
Posts: 785
Joined: Fri Jun 16, 2006 12:31 am
Political Stand:

RE: Radiation levels in Japan

Post by DodgeFB » Thu Sep 08, 2011 4:21 pm

kowalskil wrote: 1) Those interested in recently (?) measured radiation levels (at different distances from the Fukushima reactors in Japan) should see:

 http://www.meti.go.jp/earthquake/nuclea ... r02_01.pdf  
(dose levels measured 1 meter above the ground)

 http://www.meti.go.jp/earthquake/nuclea ... r02_02.pdf
(dose levels measured 1 centimeter above the ground)

Note that the color code is explained near the lower left corner of each dispay. Radiation levels are expressed in micro-Sieverts per hour. [The 10 micro-sieverts, for example, is the same as 0.01 mSv, etc. And 10 micro-Sievert/hour is the same as 0.24 mSv/day, or 7.2 mSv/month.]

2) The effect of penetrating radiation on a person depends on the dose received. The common unit of dose is Sievert (Sv). Smaller doses are expressed in milliseverts (mSv) or microseveret.

A dose of 10 Sv will most likely results in death, within a day or two.
5 Sv would kill about 50% of exposed people.
2 Sv can also be fatal, especially without prompt treatment.

0.25 Sv = 250 mSv is the limit for emergency workers in life-saving operations.
0.10 Sv = 100 mSv dose is clearly linked to later cancer risks.
0.05 Sv = 50 mSv is the yearly limit for radiation workers.

0.004 Sv= 4 mSv typical yearly dose due to natural radiation (cosmic rays, etc).
0.003 Sv= 3 mSV typical dose from mammogram

Ludwik Kowalski (see Wikipedia)
.
That is very good information. Thank you.

User avatar
1988sonya
Junior Member
Posts: 6
Joined: Mon Sep 26, 2011 7:40 am
Political Stand:

RE: Radiation levels in Japan

Post by 1988sonya » Fri Sep 30, 2011 10:12 am

Thanks for share information about of radiation effect in Japan. But can anyone say how to remove this Radiation Effect in Japan?

User avatar
appleton
Technical Administrator
Posts: 1209
Joined: Tue Jun 06, 2006 3:07 pm
Location: London, UK
Political Stand: Liberal
Contact:

RE: Radiation levels in Japan

Post by appleton » Fri Sep 30, 2011 8:54 pm

Great information in regards to removing the effect there isn't no way it can be done I think. Radiation doesn't get attracted to lead does it? It only shields you from it.

The only option would be to wait thousands of years I assume. Having a nuclear engineer chime in here or maybe even the OP himself would be cool :)
"Practical men who believe themselves to be quite exempt from any intellectual influence, are usually the slaves of some defunct economist. Madmen in authority, who hear voices in the air, are distilling their frenzy from some academic scribbler of a few years back" - John Maynard Keynes

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest