放射 ほうしゃ せい物質 ぶっしつじゃなかったです
hōshaseibusshitsujanakattadesu

Noun
Desu Copula

The polite, past negative form of 放射性物質

1. Wasn't radioactive.; Wasn't a radioactive substance.

Past/Perfective
Negative
Polite
Casual Register