Description
An initially very high-pH (>13) and high ionic-strength environment results from the degradation of the cementitious near-field materials (dissolution of alkali hydroxides into cement porewater). In a second stage, a high pH (approx. 12.5) is expected, dominated by portlandite.
OPA Category
Category as used in the OPA assessment
ILW waste and packages
OPA Number
Number as used in the OPA assessment
2.03
Waste Relevance
Classes of waste to which this FEP is relevant
ILW
NEA V1 IFEP Reference(s)
Related IFEPs from the NEA V1 IFEP list from 1999
2.1.09