Strontium in helicopter's rotors?

October 15, 2017

Radiation levels unchanged after Okinawa accident

https://www3.nhk.or.jp/nhkworld/en/news/20171015_13/

The Defense Ministry's Okinawa Bureau says radiation levels are normal near the site where a Marine Corps helicopter made an emergency landing on Wednesday after one of its engines caught fire.

The CH-53 transport helicopter burst into flames in a privately owned field in Higashi Village in the northern part of Okinawa's main island. The helicopter had been on a training flight from the Futenma Air Station.

The US military told NHK that the aircraft's rotors contain radioactive strontium, but the amount is not significant enough to pose a health risk.

The US military added that the radioactive substances were quickly and safely removed by its team.

Defense bureau officials checked the soil and water near the site on Friday and Saturday, and detected normal levels of radiation.