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Invisible for humans, but detectable for radiation-filters. A cloud with tiny levels of radioactivity, believed to originate from western Russia, has been detected over Scandinavia and European Arctic. First, in week 23 (June 2-8), iodine-131 was measured at the two air filter stations Svanhovd and Viksjøfjell near Kirkenes in short distance from Norway’s border to Russia’s Kola Peninsula. The same days, on June 7 and 8, the CTBTO-station at Svalbard measured tiny levels of the same isotope. CTBTO is the global network of radiological and seismic monitoring under the Comprehensive Nuclear-Test-Ban Treaty Organization. Norway’s nuclear watchdog, the DSA, underlines that...

Since January 2017, low levels of radioactive Iodine-131 contamination have been detected over various European countries. Highest levels have been detected in Poland. The radioactive particles were first detected in Finland. Source is anyone's guess, but the initial area of detection and area of highest concentration point to Russia. I disagree with the blog's conclusion that this is likely to be a nuclear test since I-131 has a short half-life of 8 days. More likely, there's an ongoing issue with a Russian nuclear reactor. (Doesn't have to be a power station - could be a sub or other naval reactor.)

A trace of radioactive Iodine-131 of unknown origin was in January detected over large areas in Europe. Since the isotope has a half-life of only eight days, the detection is a proof of a rather recent release. Where the radioactivity is coming from is still a mystery. The air filter station at Svanhovd was the first to measure small amounts of the radioactive Ionide-131 in the second week of January. The station is located a few hundred metres from Norway’s border to Russia’s Kola Peninsula in the north. Soon, the same Iodine-131 isotope was measured in Rovaniemi in Finnish Lapland....

Hungary was the latest European country on Saturday to confirm higher than usual levels of radioactivity in the air, although like others it maintained that this did not pose any health risks. "In Hungary, a higher-than-usual concentration of iodine-131 particles was registered in Budapest and Miskolc (in the northeast)," Geza Safrany, the head of the national research institute for radiology OSSKI, said in a statement.

Gov't didn't release radiation data after accident The Japanese government has expressed regret for not disclosing some important results of the radiation monitoring conducted near the Fukushima Daiichi nuclear plant soon after the accident. The central and Fukushima prefectural governments collected the data to determine evacuation measures as well as food and water restrictions for residents. A reading on March 12th, one day after the massive earthquake and tsunami hit the plant, shows that radioactive tellurium was detected 7 kilometers away. Tellurium is produced during the melting of nuclear fuel. Three hours before the data was collected, the government expanded...

TrueNorth found an article saying the risk in Europe from Fukushima fallout is “no longer negligible”. Children up to two years old are the most vulnerable and ingestion of 50 becquerel (Bq) is enough to deliver to the body a dose of 10 mSv, according to the institute. There’s no way that’s enough for a “body” dose of 10 mSv, or 1 rem. But since they’re talking about I-131, I’ll assume they mean “thyroid dose”. Thyroid and body aren’t interchangable. Radioactive iodine-131 values …0,08 Bq/kg in salad, spinach and leeks in Aix-en-Provence, 0,17 Bq per litre in milk in Lourdes...

Radioiodine 4,385 Times Limit Found in Seawater near N-Plant Tokyo, March 31 (Jiji Press)--Radioactive iodine 4,385 times the legal limit has been detected in seawater near the troubled Fukushima No. 1 nuclear power plant, the industry ministry's Nuclear and Industrial Safety Agency said Thursday. Some 180 becquerels of iodine-131 per cubic centimeter were found in a seawater sample collected on Wednesday afternoon 330 meters off the discharge outlet of the No. 1 to 4 reactors of the plant in Fukushima Prefecture, northeastern Japan, the agency said. The reading was higher than 3,355 times the limit of the radioactive material found...

Saturday, March 26, 2011 Levels Of Radioactive Materials Soaring In Sea Near Nuke Plant TOKYO (Kyodo)--Levels of radioactive materials are skyrocketing in the sea near the crisis-hit nuclear power station in Fukushima Prefecture, the government's nuclear safety agency said Saturday, while the plant's operator has started injecting fresh water into the No. 2 reactor core to enhance cooling efficiency. According to the government's Nuclear and Industrial Safety Agency, radioactive iodine-131 at a concentration 1,250.8 times the legal limit was detected Friday morning in a seawater sample taken around 330 meters south of the plant, near the drain outlets of its...

'Radioactive' Woman Shuts Down Russian Airport Terminal Thursday, July 24, 2008 An airport terminal in Vladivostok, Russia was evacuated Thursday after a ‘radioactive’ woman set off an alarm. The woman had just arrived from a flight from Seoul, South Korea when a radiation alarm went off forcing security officers to shutdown the terminal, Interfax news agency reported. The alarm was eventually called off when officials discovered the source of the scare was the woman. According to the news agency, she had just received radiation therapy.