2013
DOI: 10.1021/es402718j
|View full text |Cite
|
Sign up to set email alerts
|

Real-Time Gamma Imaging of Technetium Transport through Natural and Engineered Porous Materials for Radioactive Waste Disposal

Abstract: We present a novel methodology for determining the transport of technetium-99m, a γ-emitting metastable isomer of 99Tc, through quartz sand and porous media relevant to the disposal of nuclear waste in a geological disposal facility (GDF). Quartz sand is utilized as a model medium, and the applicability of the methodology to determine radionuclide transport in engineered backfill cement is explored using the UK GDF candidate backfill cement, Nirex Reference Vault Backfill (NRVB), in a model system. Two-dimensi… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

2
18
0

Year Published

2013
2013
2021
2021

Publication Types

Select...
7

Relationship

2
5

Authors

Journals

citations
Cited by 22 publications
(20 citation statements)
references
References 18 publications
2
18
0
Order By: Relevance
“…the sand does not impose a significant physical or chemical impediment to 99m Tc transport. These results were reproducible across a number of flow cells with identical conditions, and also for sand that was saturated using a pH 10 buffer (NaOH, NaHCO 3 ) [5].…”
Section: Transport Datasupporting
confidence: 59%
See 1 more Smart Citation
“…the sand does not impose a significant physical or chemical impediment to 99m Tc transport. These results were reproducible across a number of flow cells with identical conditions, and also for sand that was saturated using a pH 10 buffer (NaOH, NaHCO 3 ) [5].…”
Section: Transport Datasupporting
confidence: 59%
“…This is unsurprising, due to the net negative surface charge of sand under the conditions in this study. Since the pertechnetate anion is also negatively charged, chemical sorption is prevented by repulsive electrostatic interactions [5]. As a simplified analogue for sandstone rock, results from this study suggest that should technetium be released from a GDF, it may be transported freely by groundwater.…”
Section: Transport and Immobilization Of Technetiummentioning
confidence: 87%
“…It is possible to find, in the literature, data pertaining to NRVB prepared with laboratory (pure) materials (e.g. Corkhill et al, 2013) and also with industrial materials (e.g. Butcher et al, 2012).…”
Section: Methodsmentioning
confidence: 99%
“…These include carbon capture and storage (CCS) 1,2 , scrubbing procedures of solid waste incinerators 3 , emerging low carbon building technologies for construction [4][5][6] , and geological disposal repositories for nuclear waste 7,8 where portlandite content in cements becomes a critical factor. Despite its importance, 2,4,9-14 the carbonation mechanism in high pH environments is debated and not yet fully understood.…”
Section: Introductionmentioning
confidence: 99%