A Method of Measuring Decay Heat in Spent Nuclear Fuel using Gamma-ray Spectroscopy
2001 (English)In: Waste Management Symposium 2001 (WM'01), 2001Conference paper, Poster (Refereed)
In this paper, a method is presented for determining the decay heat in spent nuclear fuel by using gamma-ray spectroscopy. Using this method, the decay heat may be determined within ten minutes per assembly i.e. it is well suited for industrial applications in, for example, an encapsulation facility. The method has been tested and evaluated in the wet Swedish Central Storage for Spent Fuel, CLAB. Although only tested in a wet storage, the method should also be applicable for dry storage.
The objective of developing the method was primarily to investigate possibilities to achieve a fast, robust and reasonable accurate determination of decay heat by gamma-ray measurements on fuel assemblies. Such a method could also be for verification of burnup and cooling time, for safeguard purposes prior to encapsulation, (1).
So far, measurements and calculations on 35 BWR- and 34 PWR-assemblies, with various nuclear data, have been performed. The test measurements, using preliminary measuring equipment, have shown that the decay heat may be determined within an uncertainty of 3%.
Place, publisher, year, edition, pages
Research subject Applied Nuclear Physics
IdentifiersURN: urn:nbn:se:uu:diva-161472OAI: oai:DiVA.org:uu-161472DiVA: diva2:456183
Waste Management Symposium -01 (WM'01); Tucson, Arizona, USA; February 25 - March 1, 2001