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Low Level Iodine Detection by TXRF in a Reactor Safety Simulation Experiment

Published online by Cambridge University Press:  06 March 2019

F. Hegedüs ,
P. Winkler ,
P. Wobrauschek  and
Christina Streli
F. Hegedüs
Affiliation:
Swiss Federal Institute for Reactor Research, CH-5303 Würenlingen, Switzerland
P. Winkler
Affiliation:
Swiss Federal Institute for Reactor Research, CH-5303 Würenlingen, Switzerland
P. Wobrauschek
Affiliation:
Atominstitut der Österreichischen Universitäten, Schüttelstr. 115, A-1020 Vienna, Austria
Christina Streli
Affiliation:
Atominstitut der Österreichischen Universitäten, Schüttelstr. 115, A-1020 Vienna, Austria
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Extract

In the event of an accident in a light water moderated nuclear plant, the fission products escape from the water moderator in form of gas bubbles. One of the most important fission products is Iodine. Presently there are only rough estimations of the escape of Iodine. The aim of the experiment planned at the Swiss Federal Institute for Reactor Research (EIR) is to simulate the conditions of an accident and to measure the amount of Iodine which escapes from the moderator water into the space inside the reactor containment.

It is supposed that at 5 m depth in a water pool, the canning of the fuel element explodes releasing 1-3 liter large gas bubbles containing the volatile fission products. The Iodine vapor concentration, saturated in the gas bubble, will be about 3 mg/l. It is expected that the water strongly absorbs the Iodine vapor and the I concentration in the gas bubble arriving at the water surface will be strongly reduced to a few ug/l.

Type
II. XRF Techniques and Instrumentation
Information
Advances in X-Ray Analysis , Volume 30: Thirty-Fifth Annual Conference on Applications of X-ray Analysis, August 4-8, 1986 , 1986 , pp. 85 - 88
Copyright
Copyright © International Centre for Diffraction Data 1986

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References

1) Aiginger, H. and Wobrauschek, P.: “Total Reflectance X-Ray Spectrometry”. Advances in X-ray Analysis, Vol. 28 (1-10).Google Scholar