August 9th 2019 Russian Accident?

Radioactive iodine detected in Norway
https://www.reuters.com/article/us-russia-blast-norway/norway-detects-radioactive-iodine-by-russian-border-days-after-blast-idUSKCN1V510N

This doesn't add any more significant details, but contains some interesting wonderings about what might have been tested etc.

https://www.defensenews.com/global/europe/2019/08/13/an-explosion-a-spike-in-radiation-evacuation-preparations-what-exactly-happened-in-russia/

https://www.enmnews.com/2019/08/17/in-russia-after-the-radiation-came-the-rumors/

From the enmnews.com article:

On Thursday, Norway’s radiation and nuclear safety authority said it had detected tiny amounts of radioactive iodine in northern Norway.

But such traces waft across from Russia half a dozen times a year, from old nuclear tests or leaks, rendering it impossible to determine the origin, the agency said.

I thought this sounded strange as (I thought) Iodine 131 is only released during an actual nuclear reaction. Whether it is a power station or a weapon, Iodine 131 is a dead giveaway for either a Uranium, Plutonium or MOX nuclear reaction. It has a half life of about 8 days and as such is pretty much untraceable after about 30 days so I found it strange they report "such traces waft across from Russia half a dozen times a year". As it happens Iodine 131 is also used in gas pipeline testing for testing the integrity of pipelines so is a possibility of these wafts being from the gas industry, and Russia is big on natural gas.