Attended Safeguards for the BN-350 Dry Storage Facility

摘要

One technique that is currently under development for safeguarding spent- fuel in dry storage is an indirect verification method that measures the neutron flux at several locations around the exterior of the storage cask. This technique establishes a neutron "fingerprint" that is sensitive to the contents of the cask. The sensitivity of the "fingerprinting" technique to the removal of a certain amount of material from the cask is limited by the systematic uncertainties that are associated with a given dry storage scenario. In the case of the placement of spent-fuel from the BN-350 fast breeder reactor into dry storage, the consideration of safeguards issues into the design of the dry storage facility along with the well-characterized properties of the spent-fuel have enabled the development of a "fingerprint" technique that is sensitive to both the amount and location of material that is in an individual cask.