**(b) The nuclear material is contained in spent fuel or waste at any time possessed, handled, used, processed, transported or disposed of by or on behalf of any insured; or**

**(c) the injury, sickness, disease, death or destruction arises out of the furnishing by an insured of services, materials, parts or 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 (c) applies only to injury to or destruction of property at such nuclear facility.**

**III. As used herein:**

* **"hazardous properties" include radioactive, toxic or explosive properties.**
* **"nuclear material" means source material, special nuclear material or byproduct material.**
* **"source material" means uranium or thorium, or any compound thereof, which has been mined or otherwise separated from its natural source, or any material containing more than 0.1 percent by weight of uranium-235 or plutonium-239.**
* **"special nuclear material" means uranium-233, plutonium, or any compound thereof, or any material containing more than 0.1 percent by weight of uranium-233 or plutonium-239.**
* **"byproduct material" means any material produced by a nuclear reactor and which is not source material or special nuclear material.**
* **"spent fuel" means any fuel element or fuel component, solid or liquid, which has been used or exposed to radiation in a nuclear reactor.**
* **"waste" means any waste material (1) containing byproduct material and (2) resulting from the operation by any person or organization of any nuclear facility included within the definition of nuclear facility under paragraph (a) or (b) thereof.**
* **"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 the 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 or contains more than 25 grams of plutonium or 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 the site on which any of the foregoing is located, all operations conducted on such site and all premises used for such operations; "nuclear reactor" means any apparatus designed or used to sustain nuclear fission in a self-supporting chain reaction or to contain a critical mass of fissionable material;**

**With respect to injury to or destruction of property, the word "injury" or "destruction" includes all forms of radioactive contamination of property.**

**CANCELLATION**

**20. This Certificate may be cancelled at any time at the written notice of the Insured or may be cancelled by or on behalf of the Company provided thirty (30) days written notice is given to the Insured at the address shown in the Declarations. The mailing of notice as aforesaid shall be sufficient proof of notice. The effective date of cancellation stated in the notice shall become the end of the certificate period. However, in the event of cancellation or non-renewal of the underlying insurance immediately preceding this Certificate, this Certificate terminates as of the same date without notice to the Insured. If the Insured cancels, earned premium shall be computed on a short rate basis, and if cancelled by the Company, adjustment shall be pro-rata. Notice by the Company to the first named Insured, if more than one, shall be deemed notice to any other interests included as an Insured.**

**IN WITNESS WHEREOF The Company has caused this Certificate to be signed by its President and Secretary, but same shall not be binding upon the Company unless countersigned on the Declarations page by an authorized representative of the Company.**

**President**

**Secretary**

**Page 4 of 4**