When a nuclear facility (power plant or other) is decommissioned, it has to beproven that the site is free from contaminations. While this is commonlydemonstrated using radiometric methods, in the case of several long-livedradionuclides, accelerator mass spectrometry (AMS) measurements mightcontribute. This is the case for "classical" AMS radionuclides like 14C, 36Cl, 41Ca, but also for radionuclides that are more commonly attributed to nuclear waste (Puisotopes, 90Sr, 137Cs).
I will give a short introduction on how a nuclear power plant is decommissioned, what material is considered conventional waste and on typical requirements ofauthorities in this context. Afterwards, I will report on the several related AMSmeasurements that have been performed at CologneAMS so far and what thefuture of AMS in decommissiong might be.
