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ECN publication
Title:
Design of a Visual Inspection and Nuclide Identification System for High level radioactive waste (VINISH)
 
Author(s):
Verbakel, W.F.A.R.; Schram, R.P.C.
 
Published by: Publication date:
ECN NUC 1998
 
ECN report number: Document type:
ECN-RX--98-029 Article (scientific)
 
Number of pages:
10  

Published in: Paper to be presented at RECOD'98, Nice, France, 25-28 October 1998 (), , , Vol., p.-.

Abstract:
The design of a device that measures the nuclide specific activity inhigh level radioactive waste containers, and also visually inspects this container, is described. The device, called VINISH (Visual Inspection and Nuclide Identification System for High level radioactive waste), can handle waste containers with activities up to 10 TBq. The nuclide specific activity of each container is reconstructed from the measurements of the spectrum of the gamma radiation and calculations of the detection efficiency. The problem of the expected high count rates on the detector has been coped by means of: (1) providing distance between detector and source; (2) placement of two collimators and heavy shielding in front of the detector; and (3) special high count rate electronics. The design has been optimised by use of Monte Carlo calculations. 2 refs.


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