Gamma scanner for characterisation (VINISH)

Immediately after the inspection of a can, gamma-emitting radionuclides present inside can be identified with the aid of gamma spectrometry without opening the can. The gamma scanner that is used for this is called VINISH (Visual Inspection and Nuclide Identification System for High-level radioactive waste).
The can, protected by the shielded W container, is placed on VINISH. To thoroughly measure the whole can, it is rotated horizontally and moved vertically in VINISH. The can is placed in four or five different positions so that part of it is measured in each measurement. VINISH determines the activity of a number of nuclides and thus gives a clear picture of the contents of the can.

Two VINISH gamma scanners are used. The first scanner is set up at the WSF and is used immediately after the lifting of the cans. The second scanner is at the HCL to re-measure sorted cans after filling before they are transported away.

The characterisation and collection of radiation- and safety-relevant information is not only used to separate the waste economically, but is also needed to allow the sorted cans to be transported in accordance with legislation and regulations to the service provider, for disposal to COVRA, and to allow a complete dossier on the contents of a sorted can to be supplied to partners in the chain.

 

 

 

Other technical equipment:Waste Retrieval Unit (WRU) | Inspection Ring | Gamma detector for sorting (HIRARCHI) | Measurement Ring | Loading Frame | Waste Transfer Unit (WTU)