Eighteen Years of Safe Storage and Counting

摘要

Interim safe storage (ISS) is the process of demolishing all but the shield walls surrounding the reactor core, removing or stabilizing all loose contamination within the facility, and placing a new roof on the remaining structure (Reference 1). A single doorway in the structure is installed to provide access for surveillance and maintenance (S&M) work. This doorway is welded shut and all other openings in the shield walls are sealed to prevent intrusions and the release of radioactive materials. ISS is sometimes referred as "cocooning". The remaining physical structure is referred to as the safe storage enclosure (SSE) capable of being held in a SAFSTOR condition for 50 to 70 years.