2. "Nuclear Material" means "Source Material", "Special Nuclear Material" or "By-Product Material".

3. "Source Material", "Special Nuclear Material", and "By-Product Material" have the meaning given them in the Atomic Energy Act of 1954 or in any law amendatory thereof.

4. "Spent Fuel" means any fuel element or fuel component, solid or liquid, which has been used or exposed to radiation in a "Nuclear Reactor".

5. "Waste" means any material which:

a. Contains "By-Product Material" other than the tailings or wastes produced by the extraction or concentration of uranium or thorium, from any ore processed primarily for its Source Material content; and

b. Results from the operation by any person or organization of any "Nuclear Facility" included under a. and b. of the definition of "Nuclear Facility".

6. "Nuclear Facility" means:

a. Any "Nuclear Reactor";

b. Any equipment or device designed or used for:

(1) Separating the isotopes of uranium or plutonium;

(2) Processing or utilizing "Spent Fuel"; or

(3) Handling, processing or packaging "Waste";

c. Any equipment or device used for processing, fabricating or alloying of "Special Nuclear Material" if, at any time, the total amount of such material in the custody of any Insured at the premises where such equipment or device is located consists of or contains more than 25 grams of:

(1) Plutonium; or

(2) Uranium 233; or

any combination thereof, or more than 250 grams of uranium 235;

d. Any structure, basin, excavation, premises or place, prepared or used for the storage or disposal of "Waste";

and includes:

a. The site on which any of the foregoing is located;

b. All operations conducted on such site; and

c. All premises used for such operations.

7. "Nuclear Reactor" means any apparatus designed or used to:

a. Sustain nuclear fission in a self-supporting chain reaction; or

b. Contain a critical mass of fissionable material.

8. With respect to injury to or destruction of property, the words "injury" or "destruction" include all forms of radioactive contamination of property.