Modelling of Remediation Technologies at the Performance Assessment Level
Conference
·
OSTI ID:21326022
- Nexia Solutions Limited, Hinton House, Risley, Warrington, Cheshire, UK, WA (United States)
This paper presents approaches to modelling three different remediation technologies that are designed to support site operators during their assessment of remediation options for the management of radioactively contaminated land on nuclear licensed sites in the UK. The three selected technologies were soil washing, permeable reactive barrier and in-situ stabilisation. The potential exists to represent electrokinetics in the future. These technologies were chosen because it was considered that enough information already existed for site operators to assess mature technologies such as soil dig and disposal and groundwater pump and treat. Using the software code GoldSim, the models have been designed to allow site operators to make both a reasonable scoping level assessment of the viability of treatment and understand the cost-benefits of each technology. For soil washing, a standard soil leaching technique was simulated whereby the soil is separated into fines and oversize particles, and subsequently a chemical reagent is used to strip contamination off the soil. The cost benefit of this technology in terms of capital costs for the plant and materials, operational costs and waste disposal costs can also be assessed. The permeable reactive barrier (PRB) model can represent either a continuous wall or a funnel and gate system. The model simulates the transport of contaminants through the reactive material contained in the PRB. The outputs from the model include concentration of contaminants in the groundwater flow downstream of the PRB, mass of contaminants retained by the PRB, total mass and volume of waste and the various costs associated with the PRB remediation technology. The in-situ stabilisation (ISS) model has the capability to represent remediation by the addition of reagents that immobilise contaminated soil. The model simulates the release of contaminants from the treated soil over time. Performance is evaluated by comparison of the mass of contaminants retained and released to the area outside the treatment zone. Other outputs include amount of spoil generated (to be treated as waste) and the costs associated with the application of the ISS technology. These models are aimed to help users select a technology or technologies that are potentially suitable for a particular site. It is anticipated that they will prompt the user to undertake more detailed assessments to tailor the selected technology to their site specific circumstances and contaminated land conditions. (author)
- Research Organization:
- WM Symposia, 1628 E. Southern Avenue, Suite 9 - 332, Tempe, AZ 85282 (United States)
- OSTI ID:
- 21326022
- Report Number(s):
- INIS-US--10-WM-08030
- Country of Publication:
- United States
- Language:
- English
Similar Records
Modelling the remediation of contaminated groundwater using zero-valent iron barrier
Overview on backfill materials and permeable reactive barriers for nuclear waste disposal facilities.
Superfund record of decision (EPA Region 1): Fletcher`s Paint Works and Storage, Milford, NH, September 30, 1998
Conference
·
Sun Jul 01 00:00:00 EDT 2007
·
OSTI ID:21294624
Overview on backfill materials and permeable reactive barriers for nuclear waste disposal facilities.
Technical Report
·
Wed Oct 01 00:00:00 EDT 2003
·
OSTI ID:917140
Superfund record of decision (EPA Region 1): Fletcher`s Paint Works and Storage, Milford, NH, September 30, 1998
Technical Report
·
Sun Feb 28 23:00:00 EST 1999
·
OSTI ID:350743