Fingerprint Analysis

NNL has over 25 years' experience of developing isotopic fingerprints for wastes relative to key indicator radionuclides to support LLWR disposal for 18 UK nuclear power stations. We offer advice and support from the initial project proposal to ensure the characterisation is fit for purpose through to final reporting and potential rationalisation of waste streams.


NNL has a proven track record of sampling contaminated areas at a number of nuclear sites. Our highly skilled analysts are fully trained and have experience of working under the different requirements of each station.


NNL takes a high quality approach to ensuring that samples taken are representative and carry out thorough dissolution procedures. We tailor the analysis to each stations requirements and can carry out a comprehensive suite of radiochemical determinations to fully characterise the waste. Analysis can include:

Total alpha and total beta activity analysis

We provide a range of total alpha, low and high-energy beta analysis.

Gamma emitters

Sc-46, Cr-51, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Se-75, Nb-94, Nb-95, Zr- 95, Ru-103, Ru-106, Ag-108m, Ag-110m, Sb-124, Sb-125, Ba-133,
Cs-134, Cs-137, Ce-144, Eu-152, Eu-154, Eu-155, Ta-182, Hg-203.

Beta/X-ray emitters

H-3, C-14, S-35, Cl-36, Ca-41, Ca-45, Fe-55, Ni-59, Ni-63, Sr-90 (& Y-90), Tc-99, I-129, Sm-151, Pm-147, Pu-241.

Alpha emitters

Am-241, Am-243, Cm-242, Cm-243/244, Np-237, Pu-238, Pu-239/240, Pu-242, Th-228, Th-229, Th-230, U-232, U-233/234, U-235/236, U-238,

Fingerprints for each area are produced and ratios to key indicators obtained, usually Co-60 and Cs-137. Area fingerprints are used to produce waste stream fingerprints. Finally, waste stream fingerprints are then used with a gamma assessment of waste drums or items to provide consignment inventories for disposal.



Fingerprint Analysis