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Showing posts with label I-131. Show all posts
Showing posts with label I-131. Show all posts
Latest radiological monitoring in Japan
Radiological Monitoring and Consequences - 19 April 2011
View more presentations from IAEA
There are spikes in deposition around April 10; the report does not tell us why.
Also the IAEA reported: "Work to strengthen the electrical power system between Units 1 - 2 and Units 3 - 4 was completed on 19 April. White "smoke" continues to be emitted from Units 2, 3 and 4."
IRSN April 8th, bulletin
"Depuis la détection d’iode 131 le 24 mars, au sommet du Puy de Dôme, les résultats de mesures obtenus par l’IRSN ou transmis par les exploitants jusqu’à ce jour confirment une présence généralisée de traces d’iode 131 en France dans l’air, les végétaux et le lait, en relation avec les rejets radioactifs dans l’air de l’accident de Fukushima (voir synthèses n°4 à 11).
Les concentrations en radionucléides artificiels mesurées en France dans les différents milieux surveillés restent très faibles :
- entre quelques dixièmes de millibecquerels et quelques millibecquerels d’iode 131 par mètre cube d’air (mBq/m3) ;
- au maximum quelques becquerels par kilogramme (Bq/kg) de végétaux (herbe ou légumes feuilles) ;
- au maximum quelques becquerels par litre (Bq/L) dans l’eau de pluie ou dans le lait.
Des traces de césium 134, césium 137 et ponctuellement de tellure 132, imputables à l’accident de Fukushima, sont également mesurées dans l’air en différents points du territoire, à des activités de l’ordre de quelques centièmes de millibecquerels par mètre cube d’air. Les résultats de mesure pour ces radionucléides dans les autres catégories de prélèvement sont la plupart du temps inférieurs aux limites de détection des appareils utilisés.
Ces niveaux de concentration en radionucléides artificiels mesurés en France dans les différents milieux surveillés sont conformes aux prévisions de l’IRSN (voir la note sur l’impact à très grande distance des rejets radioactifs provoqués par l’accident de Fukushima). Ils sont très faibles et représentent aucun risque environnemental ou sanitaire, même en cas de persistance dans la durée.
Télécharger le Bulletin d’information n°12 du 8 avril 2011 à 17h (document PDF) "
If you want to know more go to their web site at: http://www.irsn.fr/FR/Actualites_presse/Actualites/Pages/20110408_synthese-resultats-mesures-environnement-france.aspx
Salt shortage in South Korea prompted by radiation scare
Fear that the salt will be contaminated and that perhaps it may help in reducing the uptake of Iodine-131 by the Thyroid gland.
While reading Wikipedia article on Fukushima
"On 23 March, it was reported that low level neutron radiation (reported as "neutron beam") was observed several times. The measured neutron radiation may have originated from leaked uranium or plutonium. [263]
On 23 March, it was reported that the cooling pump at reactor No 5 stopped working when it was transferred from backup power to the grid supply.[269][270]
This contains 6375 fuel assemblies and was reported 'secured' with a temperature of 55 °C. After further cooling, fuel can be transferred to dry cask storage, which has shown no signs of abnormalities.[271] On 21 March temperatures in the fuel pond had risen a little to 61 °C and water was sprayed over the pool.[2]
Asahi Shimbunreported that by 24 March the accident might have emitted 30,000 to 110,000 TBqof radioiodine.[272] On the INES scale, the accident would rate 6 rather than the official level 5, according to the newspaper.
On March 23, Tokyo drinking water exceeded the safe level for infants, prompting the government to distribute bottled water to families with infants.[277] World wide measurements of wind-born radioactive iodine and caesium vented from reactors suggest that levels have reached around 2/3 those during the Chernobyl disaster, though in that case other radioactive material was also released.[10]
On 23 March, it was reported that the cooling pump at reactor No 5 stopped working when it was transferred from backup power to the grid supply.[269][270]
This contains 6375 fuel assemblies and was reported 'secured' with a temperature of 55 °C. After further cooling, fuel can be transferred to dry cask storage, which has shown no signs of abnormalities.[271] On 21 March temperatures in the fuel pond had risen a little to 61 °C and water was sprayed over the pool.[2]
Asahi Shimbunreported that by 24 March the accident might have emitted 30,000 to 110,000 TBqof radioiodine.[272] On the INES scale, the accident would rate 6 rather than the official level 5, according to the newspaper.
On March 23, Tokyo drinking water exceeded the safe level for infants, prompting the government to distribute bottled water to families with infants.[277] World wide measurements of wind-born radioactive iodine and caesium vented from reactors suggest that levels have reached around 2/3 those during the Chernobyl disaster, though in that case other radioactive material was also released.[10]
The Wall Street Journal reported on 25 March that authorities were considering raising the event to level 6, a "serious accident," one level above the Three Mile Island accident, and second only to Chernobyl.[279] On the same day, Asahi Shimbun supported this upgrading, based on the amount of radioactive contamination.[272][280]
the Finnish nuclear safety authority—estimated the accidents at Fukushima to be at Level 6 on the INES.[283][284] On 24 March, a scientific consultant for Greenpeace, working with data from the Austrian ZAMG[285] and French IRSN, prepared an analysis in which he rated the total Fukushima I accident at INES level 7.[286]"
Radiation has been detected n rain water in the US
"Massachusetts, Pennsylvania, Nevada and other Western states are among the states that have reported minuscule amounts of radiation.
Nuclear-plant operators Progress Energy Inc. and Duke Energy Corp. in North Carolina and South Carolina Electric & Gas Co. also said they have detected trace amounts of radiation.
Nuclear experts and health officials said there is no public-health risk. The U.S. Environmental Protection Agency said people are exposed to much more radiation on an international airline flight."
Except that radiation in a flight last for the time of the flight, Cs-137,Cs-134,Strontium-90 and Plutonium, uranium ...will remain around for a long time and keep releasing radiation.
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