All other terms and conditions of the policy remain unchanged.

* **"Nuclear Facility"** means 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 the insured at the premises where such equipment or device is located consists of the insured of "Plutonium" or "Uranium 233" or any combination thereof, or more than 250 grams of uranium 235, or

* **"Nuclear Reactor"** means any apparatus designed or used to sustain nuclear fission in a self-supporting chain reaction to contain a critical mass of fissile material;

* **"Nuclear Waste"** means any fuel element or fuel component, solid or liquid, which has been used or exposed to radiation in a "Nuclear Reactor";

* **"Byproduct Material"** other than the tallings of "Waste" produced by the extraction of co-concentration of uranium from any "Source Material" included within the definition of "Nuclear Facility" under paragraph (a) or (b) thereof;

* **"Source Material"**, "Special Nuclear Material", and "Byproduct Material" have the meanings given them in the Atomic Energy Act of 1954 or in any law amendatory thereof.