radiological attack
A military or terrorist attack using radioactive materials, distinct from a nuclear explosion.
The threat of radiological attacks by terrorist groups is increasing.
核攻撃 refers to a nuclear attack involving a nuclear explosion, while 放射能攻撃 is a radiological attack using radioactive dispersal without a nuclear detonation.
Compound of 放射能 (radioactivity) and 攻撃 (attack).