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USFWS Polar Bear Draft Plan Comment Deadline is soon – almost midnight Saturday night (11.59) on the US East Coast. See more here: https://miningawareness.wordpress.com/2015/09/15/polar-bear-plan-must-include-impact-of-radionuclides-comment-deadline-sat-19-sept-1159-pm-et-dc-ny-us-fisheries-wildlife-service/
US FWS polar bear with cubs 2
Around Half of the Radioactive iodine 129, half-life 15.7 million years, emitted by the nuclear facilities of Sellafield (UK) and La Hague (France), is estimated to end up in the Arctic. Now you see how. (See more at the bottom of the post). Nuclear power emits deadly radionuclides during the entire fuel chain. Nuclear reactors legally leak radiation. When they have accidents, they leak even more. Much nuclear waste is also allowed to leak. Some will end up in the Arctic.
Air Pollution to Arctic 2005 From collection: Barentswatch Atlas Author: GRID-Arendal
Year: 2005
From collection: Barentswatch Atlas
Author: GRID-Arendal
Description:
The pollution from industrialized nations are affecting the environment in the Arctic region. The main areas of industrial activity in the northern hemisphere are spreading to specific areas in the Arctic though air currents
“. http://www.grida.no/graphicslib/detail/dominating-air-currents_b902
Arctic Sea Currents Philippe Rekacewicz, UNEP/GRID-Arendal
Year: 2005
From collection: Barentswatch Atlas
Author: Philippe Rekacewicz, UNEP/GRID-Arendal
Description:
Arctic Ocean circulate in a large clockwise rotational pattern moving from east to west around the polar ice cap. This rotating pattern, known as a gyre, occurs as a result of the clockwise winds that typically occur in this region. The Barents region is affected by this and the ice edge extent in the Arctic.
http://www.grida.no/graphicslib/detail/ocean-currents-and-sea-ice-extent_4aa6

its unique geographical, climatic and biological characteristics mean that the Arctic is a ‘sink’ for certain pollutants transported into the region from distant sources,…The region is a focus for major atmospheric, riverine and marine pathways that carry contaminants over long distances. These forms of long-range transport include strong south-to-north airflows, northward-flowing Arctic rivers which can lead to local and regional dispersal of contaminants, and ice and ocean currents that can store and transport pollution….

The Arctic is vulnerable to radioactive pollution transported from distant sources, whether by ocean currents or via the atmosphere. These sources include the atmospheric nuclear tests conducted in the 1950s and 1960s, nuclear fuel reprocessing, historical dumping and, more recently, accidents such as those at nuclear power plants in Chernobyl in 1986 and Fukushima in 2011.

Transfer pathways for certain radionuclides in the Arctic terrestrial environment can also lead to elevated human exposures. Moreover, the Arctic has a high density of sources of radioactive material, due to historical dumping of radioactive waste in some areas of the Russian Arctic, incomplete decommissioning of nuclear equipment and the inadequate storage of waste.” (p. 2)

New potential sources of radioactive contamination in the Arctic include the decommissioning of nuclear power plants in Europe, which may lead to temporary increases in radioactive discharges that could eventually reach the Arctic. New nuclear power plants are also planned in areas where a nuclear accident could potentially affect the Arctic region, and many older plants have been granted extensions to their operating licenses” p. 5, “Summary for Policy-makers: Arctic Pollution Issues 2015 Persistent Organic Pollutants; Radioactivity in the Arctic; Human Health in the Arctic” (Emphasis our own) Read the document here: http://www.amap.no/documents/download/2222

If a polar bear eats reindeer, caribou, and other food, with the same maximum contamination level that the US FDA allows people to eat, s/he would be exposed to around 100 mSv per year, since polar bears eat around three times more food. This is not far-fetched as Norwegian Reindeer have remained in that range of contamination, largely due to Chernobyl Nuclear Reactor Accident. They were also seriously impacted by nuclear weapons testing, especially nearby Russian weapons testing.

A highly contaminated reindeer is more likely to be sick, and hence more likely to be eaten by a bear:
Brown bears and polar bears prey on reindeer of all ages, but like the wolverines they are most likely to attack weaker animals, such as calves and sick deer, since healthy adult reindeer can usually outpace a bearhttps://en.wikipedia.org/wiki/Reindeer Medical coverage for Reindeer with cancer or thyroid problems is getting eaten.

100 mSv is 5 times more than recommended for nuclear workers per year. And, if polar bears have the same risk as humans, then, according to BEIR, 2006, they would have an excess risk of cancer of about 10% after 10 years (1% after 1 year.) Some experts believe that the risk is twice as high. [Recent research suggests that excess cancers may be 15 times or more greater than BEIR estimated: https://miningawareness.wordpress.com/2015/12/19/another-look-at-the-recent-low-dose-radiation-exposure-study-inworks/ ]

Does Obama-care pay for polar bear cancer treatment? Thyroid medication? Of course, this is supposed to be 1,000 out of a population of 100,000. But, there aren’t 100,000 polar bears left in the Arctic! Cesium 137 ups and downs in Norwegian Reindeer over time: http://www.environment.no/Goals-and-indicators/Goals-and-indicators/Radioactive-pollution/Limit-radiation/Geographical-distribution-of-caesium-137-in-soils-in-Norway-/Caesium-137-in-wild-reindeer-/
A polar bear looks out over a barrier island on the Arctic coast of Alaska. These islands are important habitat for the polar bear.  Photo Credit: USFWS
A polar bear looks out over a barrier island on the Arctic coast of Alaska. These islands are important habitat for the polar bear. Photo Credit: USFWS
Philippe Rekacewicz, UNEP/GRID-Arendal
Year: 2005
From collection: Barentswatch Atlas
Author: Philippe Rekacewicz, UNEP/GRID-Arendal
Description:
Worldwide there are thought to be 22,000-27,000 polar bears (Ursus maritimus)in 20 separate populations. They can be found in the United States, Canada, Russia, Greenland and on the Arctic islands of Norway.
http://www.grida.no/graphicslib/detail/distribution-of-polar-bear-populations-in-the-arctic_b75a
Polar Bear Nuclear Won't Save the Climate
http://www.sortirdunucleaire.org

Radioactive Cesium in Sea Ice Sediment

(This was prior to the ongoing Fukushima Daiichi Nuclear Accident, which continues to contaminate the air and sea, by TEPCO’s own admission.)

Cesium 137 sea ice sediment contamination ranged from 1.8 to 4,000 Bq/kg, according to Mor, 2012. Only 5% of samples were higher than 38 Bq/kg, however. Excluding the higher outliers, the average was 9.1 +/- 7.4 Bq per kg (i.e. 1.7 to 16.5 Bq/kg). The highest amount of 4,000 Bq/kg was near Franz Josef Land (collected Sept. 2001). Cota et. al. reported 2500 Bq/kg from the Canadian Archipelago (date was 1995). See: p. 47 “Radionuclides in the Arctic Ocean : tracing sea ice origin, drifting and interception of atmospheric fluxes“, Patricia Cámara Mor, PhD thesis, 2012 UNIVERSITAT AUTÒNOMA DE BARCELONA INSTITUT DE CIÈNCIA I TECNOLOGIA AMBIENTALS Read the dissertation here: http://www.tdx.cat/bitstream/handle/10803/123297/pcm1de1.pdf?sequence=1

Unexpectedly high radioactivity burdens in ice-rafted sediments from the Canadian Arctic Archipelago Glenn F. Cota, Lee W. Cooper. Dennis A. Darby, I.L. Larsen
Science of The Total Environment, 31 July 2006, Vol.366(1):253–261
Abstract
Unexpectedly high specific activities of (137)Cs (1800-2000 Bq kg(-1) dry weight) have been detected in fine-grained sediments entrained in multi-year sea ice floes grounded in Resolute Bay near the center of the Northwest Passage through the Canadian Arctic Archipelago. These results are remarkable because: (1) the specific activities are about two orders of magnitude higher than average specific activities detected in previous studies of sea ice rafted sediments from the Arctic Ocean, (2) two independent observations of these unexpectedly high specific activities were made several years apart, (3) the sampling site is on the opposite side of the Arctic basin from potential radioactive sources such as disposal and weapons testing sites of the former Soviet Union and nuclear fuel reprocessing sites in western Europe, and (4) the closest compositional match to known geologic source regions is Banks Island, on the western edge of the Arctic Archipelago, although a smaller number of grains from one of the two samples were mineralogically matched to sediments in the Laptev Sea. Consequently, the sediments are probably not from a single distinct source and were likely mixed during sea ice transport. Coupled with previous observations of higher radionuclide specific activities in some sea ice rafted sediments relative to bottom sediments, these new observations indicate that comparatively high as well as variable radioactive contaminant burdens in ice rafted sediments must be common and geographically independent of proximity to known contaminant sources. The mechanisms that would facilitate these unexpected high radionuclide burdens in sea ice are not known and require additional study, as well as investigations of the implications for the transport and fate of contaminants in Arctic sea ice.
http://www.ncbi.nlm.nih.gov/pubmed/16197983 (Emphasis added) Note that their actual data go as high as 2528 +/- 84 Bq/kg for 1995 and 1857 +/- 37 Bq/kg for 1998. (Table 1, p. 4)

The behaviour of ¹²⁹I released from nuclear fuel reprocessing factories in the North Atlantic Ocean and transport to the Arctic assessed from numerical modelling.“Mar Pollut Bull. 2015 Jan 15;90(1-2):15-24. Villa M, López-Gutiérrez JM, Suh KS, Min BI, Periáñez R. “Thus, 5.1 and 16.6 TBq of (129)I have been introduced in the Arctic from Sellafield and La Hague respectively from 1966 to 2012. These figures represent, respectively, 48% and 55% of the cumulative discharge to that time. Inventories in the North Atlantic, including shelf seas, are 4.4 and 13.8 TBq coming from Sellafield and La Hague respectively” Read the abstract here: http://www.ncbi.nlm.nih.gov/pubmed/25487086
TBq terabecquerel (1 x 10 to the power of 12), 13,800,000,000,000 Bq 13.8 TBq for La Hague. 4,400,000,000,000 4.4 TBq Sellafield https://en.wikipedia.org/wiki/Becquerel

Half-lives
Cesium 137 has a half-life of about 30 years. Thus, after 300 years 0.097% will be left. Iodine 129 has a half-life of 15.7 million years, so it’s not worth even doing the calculation.
20 half-lives is still 0.0001 % which is still dangerous
1 half life = 50% left
10 half life = 0.097% left
20 half life = 0.0001% left
Radioactive iodine in Arctic sea ice may have European origin  European Union
http://ec.europa.eu/environment/integration/research/newsalert/pdf/radioactive_iodine_in_arctic_sea_may_have_european_origin_407na7_en.pdf