A source from Japan with a background in nuclear engineering writes:
I get permission to write an article from one Minamisoma’s resident who found the real black material (520micro SV). [...]
As a picture, real black substance which found by one Minamisoma’s resident shows 2893cps, it is much stronger than Mr. Ooyama’s 500cps sample. In comparison with other low-level samples (approx. 140cps), real black substance has extremely higher radiation.
Up to now, both Mr. Ooyama and City of Minamisoma have not measured the real black substances at all. Black substance might have over 10M Bq/kg (possibly 20M Bq/kg) Cs134+Cs137! It is too dangerous and must be analyzed by public institutions.
Published: April 29th, 2012 at 12:10 am ET