B. Any injury or "nuclear property damage" resulting from the "hazardous properties" of "nuclear material," if:

1. the "nuclear material" (a) is at any "nuclear facility" owned by, or operated by or on behalf of, any Insured or (b) has been discharged or dispersed therefrom;

2. the "nuclear material" is contained in "spent fuel" or "nuclear waste" at any time possessed, handled, used, processed, stored, transported or disposed of by or on behalf of any Insured; or

3. the injury or "nuclear property damage" arises out of the furnishing by any Insured of services, materials, parts of equipment in connection with the planning, construction, maintenance, operation or use of any "nuclear facility," but if such facility is located within the United States of America, its territories or possessions or Canada, this Exclusion B.3. applies only to "nuclear property damage" to such "nuclear facility" and any property therein.

C. As used in this exclusion:

1. "Hazardous properties" includes radioactive, toxic or explosive properties.

2. "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 "nuclear waste";

   c. any equipment or device used for the 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

7. "Source material," "special nuclear material," and "by-product material" have the meanings given them in the Atomic Energy Act of 1954 or in any law amendatory thereof.

8. "Spent fuel" means any fuel element or fuel component, solid or liquid, which has been used or exposed to radiation in a "nuclear reactor."

This endorsement does not change any other provision of the policy.