The rail shipments have already begun, the laboratory said.
The laboratory said it did not find any conclusive evidence that such a detonator existed.
A tiny amount of radiation was vented from the reactor stack, the laboratory said.
He had a major heart attack five days earlier, the laboratory said.
The laboratory says the uranium-233 readings were minimal and not a cause for concern.
The other laboratory would say that the father was definitely - again, with astronomically high odds - not the father.
The laboratory said it would give him access for 15 working days.
The laboratory has said it would bear the cost of any retesting.
Radiation just outside the cube is very slightly above background levels for Long Island, the laboratory said.
Hospitals and laboratories said they could do their own tests for much less.