Idaho Code § 5-244

No action or proceeding to recover for latent ionizing radiation damage shall be barred by recovery in any earlier action or proceeding, unless the plaintiff in the earlier action or proceeding shall actually have been awarded damages for the latent injury, or shall have known or reasonably have been expected to know that such latent damage would occur, and its nature and extent with sufficient particularity to establish entitlement to a specific amount of damages on account thereof.