Implementation of the indirect assessment method for 129I and 135Cs accumulation in the RBMK-1500 reactor coolant purification system

Jermolajev, A.; Juodis, L.; Druteikienė, R.; Remeikis, Vidmantas

doi:10.1016/j.nucengdes.2013.11.079

Cited by 6 publications

(1 citation statement)

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“…Iodine-129 is a fission product present in the spent fuel from nuclear power plants and it is considered as a key mobile radionuclide for the disposal of spent fuel and high-level radioactive waste [8][9][10]. The behaviour of iodine in the geomedia is of particular importance because of its long half-life ( 129 I, T ½ = 1.57 • 10 7 years), its radiotoxicity, and its chemistry [11]. Since iodine is very much soluble, it easily migrates along water pathways if it enters the environment [12].…”

Section: Introductionmentioning

confidence: 99%

Immobilization of radioactive waste in cement: Iodine binding by cementitious materials under highly alkaline conditions

Druteikienė¹,

Šapolaitė²,

Ežerinskis³

et al. 2015

Lith. J. Phys.

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This work is directed to assess iodine interactions with hardened cement paste (HCP) under highly alkaline conditions (pH > 12) with/without a reductant. For this purpose, a series of Kd(distribution coefficient) experiments using127I as a tracer were performed. The Kdvalues of iodine were in the order of 172–1095 mL g–1in the batch experiment without a reductant, and in the order of 83–92 mL g–1in the experiment with a reductant. The percentage of iodine leached out from HCP throughout the experiment suggested its very strong binding with cementitious materials. The obtained results allow supposing that chemical speciation of iodine has influence on the interaction of iodine with HCP under highly alkaline conditions.

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