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Niobium Concentration Measurement in Steel Samples with TXRF

Published online by Cambridge University Press:  06 March 2019

F. Hegedüs  and
P. Winkler
F. Hegedüs
Affiliation:
Paul Schcrrer Institute CH-5232 ViHigen PSI
P. Winkler
Affiliation:
Paul Schcrrer Institute CH-5232 ViHigen PSI
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Extract

In nuclear power plants the fast neutron fluence on the pressure vessel (PV) inner wall is measured by the scraping sampling method (1). As the inner plating of the pressure vessel contains 0.5 - 0.6 % of niobium, 93mNb (tt/2 = 16a) isomer is produced by the reaction 93Nb (n, n’). The activity of 93mNb is related to the fast neutron fluence.

Scraping samples (few hundred of mg) were taken from the PV inner wall. The niobium was chemically extracted from steel by using a HAP column. This extraction was needed to reduce matrix effects and to avoid interferences of other activities with 93mNb

Type
V. XRF Instrumentation and Techniques
Information
Advances in X-Ray Analysis , Volume 34: Thirty-Ninth Annual Conference on Applications of X-ray Analysis, July 30 - August 3, 1990 , 1990 , pp. 239 - 241
Copyright
Copyright © International Centre for Diffraction Data 1990

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References

1. Hegedüs, F.: Fast Neutron Dosimetry by means of Scraping Sampling Method. Proceedings of the Fifth ASTM-Euratom Symposium on Reactor Dosimetry. Edited by J. P. Gcnthon and H. Röttger, 1985.Google Scholar
2. Hegedüs, F. et al.:TXRF Spectrometer for Trace Element Detection. Advances in X-Ray Analysis. Vol.33.Google Scholar