The Grafenrheinfeld interim storage facility is located on the site of the Grafenrheinfeld nuclear power plant and is enclosed within the nuclear power plant site. This means that CASTOR® casks only need to be moved a short distance from the reactor building to the interim storage facility and that no public roads need to be used. The entire site is protected by a security perimeter fence.
The site houses two storage areas with a capacity of 88 spaces: Storage area 1 has a surface area of 670 m² for 40 spaces; storage area 2 covers 760 m² for 48 spaces. Casks are stored in 5 or 6 double rows, each with 8 spaces.