Marine Environment Monitoring<br />Assessment of IAEA Environment Laboratories on Data provided by Japan<br />Update 7 Apr...
General comments<br /><ul><li>The contamination of the marine environment has occurred both through atmospheric fallout or...
Authorised discharge of low level contaminated water (4 April)
Japanese institutes continue to perform measurements in seawater at 30 m and 330 m off the discharge points of Dai-ichi NP...
Additional sampling stations at 10 and 20 km offshore, for which both surface and bottom seawater are sampled (M9-M10)
New transect 15 km offshore
Mainly surface water was collected and analysed, but meanwhile also some analyses for deep water samples were carried out<...
Concentrations in sea water near discharge point of Unit 1-4<br />
Concentrations in sea water near discharge point of <br />Unit 5 and 6<br />
Upcoming SlideShare
Loading in...5
×

Marine Environment Monitoring

8,287

Published on

Assessment of IAEA Environment Laboratories on Data provided by Japan

Update 7 April

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
8,287
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
273
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Marine Environment Monitoring

  1. 1. Marine Environment Monitoring<br />Assessment of IAEA Environment Laboratories on Data provided by Japan<br />Update 7 April<br />IAEA Environment Laboratories, Monaco<br />
  2. 2. General comments<br /><ul><li>The contamination of the marine environment has occurred both through atmospheric fallout or washout with precipitation, and through discharges of contaminated water into the sea
  3. 3. Authorised discharge of low level contaminated water (4 April)
  4. 4. Japanese institutes continue to perform measurements in seawater at 30 m and 330 m off the discharge points of Dai-ichi NPP, as well at 10 km and 20 km off-shore and along two North-South transects situated 15 and 30 km off-shore</li></li></ul><li>Seawater sampling offshore Fukushima carried out by Japanese Authorities <br />Seawater sampling locations of Japanese Authorities<br /><ul><li>Transect about 30 km offshore, sampling points separated by 10 kilometres, surface and bottom seawater sampled
  5. 5. Additional sampling stations at 10 and 20 km offshore, for which both surface and bottom seawater are sampled (M9-M10)
  6. 6. New transect 15 km offshore
  7. 7. Mainly surface water was collected and analysed, but meanwhile also some analyses for deep water samples were carried out</li></ul>Map 1<br />
  8. 8. Concentrations in sea water near discharge point of Unit 1-4<br />
  9. 9. Concentrations in sea water near discharge point of <br />Unit 5 and 6<br />
  10. 10. I-131 concentration in sea water<br />
  11. 11. Cs-137 concentration in sea water<br />
  12. 12. Conclusions<br /><ul><li>The highest levels are still measured close to the coast, namely 30 m, 330 m and 10 km near-shore.
  13. 13. Concentration data from about 30 km off-shore show a generally decreasing time trend
  14. 14. It can be expected that, if no additional releases occur, the levels measured at the stations 30 km off-shore will continue to decrease significantly by dilution into deeper layers and dispersion by ocean currents</li></li></ul><li>Conclusions<br />The number of marine sampling points has been increased with a new North-South transect 15 km offshore <br />One marine expert from IAEA Environmental Laboratories, Monaco has been in Japan to review and advise on marine sampling and measurements (back yesterday night) . <br />
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×