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Investigation on the determination of disposal critical nuclides in waste from PWR power plants, final report (1993)

AuthorNIRAS, SCKCEN
Date1993
Classification 6.01.5.50/49 (WASTE - RADIOACTIVE WASTE GENERAL)
Front

From the publication:

SUMMARY

An R & D programme has been conducted in Belgium on the main waste streams
arising from the operation of PWR power plants, in order to assay, both in a practical
and reliable way, the concentrations of a number of longer-lived nuclides such as
C-14, Ni-59, Ni-63, Sr-90, Nb-94, Tc-99, 1-129, Cs-135, Cs-137 and the
transuranium elements.

The aim was to evaluate the possibility of deducing the concentrations of the longer-
lived "critical" nuclides from the data on easily measurable. "key" nuclides such as
Co-60 and Cs-137, e.g. by gamma spectrometry on conditioned drums. If so, some
correlations can be defined.

A number of samples from representative batches of primary water, evaporator
concentrates, ion exchange resins and filter cartridges were collected at the
different PWR power plants operated in Belgium and destructively analyzed in order
to determine their content of critical nuclides and key nuclides. In parallel, a
number of cemented drums made from the same batches were examined by gamma
spectrometry in order to confirm the concentrations of key nuclides determined by
destructive analysis. As an additional verification, some of these conditioned drums
were core drilled and the samples analyzed destructively.

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