The Significance of Carbon 14 in Graphite Reactor Components at End of Generation

Metcalfe, M.P.; Tzelepi, Athanasia

doi:10.4236/jep.2019.102008

Cited by 3 publications

(1 citation statement)

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“…[20] This concurrent activation path could explain 14 C distribution with depth, as the external graphite layers should be more enriched in 14 N than the bulk due to manufacturing process and exposure to air,. [13,17,21] Dealing with 36 Cl, a depth gradient may similarly arise from activation of 35 Cl by (n,γ) reaction, since 35 Cl may be more concentrated in the superficial layers of the graphite blocks as well. [22] In this case, the purification treatments usually performed during graphitization involve the exposure of carbon blocks to halogen gases, such as fluorinated and chlorinated gases.…”

Section: Introductionmentioning

confidence: 99%

Determination of nuclear graphite impurities by prompt gamma activation analysis to support decommissioning operations

Mossini

Révay

Camerini

et al. 2022

J Radioanal Nucl Chem

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Elemental composition of non-irradiated nuclear grade graphite was determined by Prompt Gamma Activation Analysis (PGAA) to quantitively assess some neutron activation precursors. The knowledge of these data is paramount for an accurate radiological characterization of the material before decommissioning of graphite-moderated nuclear reactors. Bulk results of most of the nuclides were consistent with benchmark Inductively Coupled Plasma–Mass Spectrometry (ICP-MS) and literature data. In the case of 14N and 35Cl, depth distribution profiles were observed and quantified for the first time. These outcomes could shine a light on 14C and 36Cl depth distribution profiles and fractional release during leaching experiments.

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