放射 ほうしゃ せい物質 ぶっしつではありませんでした
hōshaseibusshitsudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 放射性物質

1. Was not radioactive.; Was not a radioactive substance.

Past/Perfective
Negative
Polite
Formal Register