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Title: HANFORD K BASINS SLUDGE RETREIVAL & TREATMENT

This paper shows how Fluor Hanford and BNG America have combined nuclear plant skills from the US and the UK to devise methods to retrieve and treat the sludge that has accumulated in K Basins at the Hanford site over many years. Retrieving the sludge is the final stage in removing fuel and sludge from the basins to allow them to be decontaminated and decommissioned, thus removing the threat of contamination of the Columbia River. A description is given of sludge retrieval using vacuum lances and specially developed nozzles and pumps into Consolidation Containers within the basins. The special attention that had to be paid to the heat generation and potential criticality issues with the irradiated uranium-containing sludge is described. The processes developed to re-mobilize the sludge from the Consolidation Containers and pump it through flexible and transportable hose-in-hose piping to the treatment facility are explained with particular note made of dealing with the abrasive nature of the sludge. The treatment facility, housed in an existing Hanford building is described, and the uranium-corrosion and grout encapsulation processes explained. The uranium corrosion process is a robust, tempered process very suitable for dealing with a range of differing sludge compositions. The groutmore » process to produce the final waste form is backed by BNG America's 20 years experience of grouting radioactive waste at Sellafield and elsewhere. The use of transportable and re-usable equipment is emphasized and its role noted in avoiding new plant build that itself will require cleanup. The processes and techniques described in the paper are shown to have wide applicability to nuclear cleanup worldwide.« less
Authors:
Publication Date:
OSTI Identifier:
841364
Report Number(s):
HNF-24569-FP, Rev.0
DE-AC06-96RL13200; TRN: US0502580
DOE Contract Number:
AC06-96RL13200
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 5 Jul 2005
Research Org:
FH (US)
Sponsoring Org:
ENVIRONMENTAL MANAGEMENT (US)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; ABRASIVES; COLUMBIA RIVER; CONTAINERS; CONTAMINATION; CORROSION; CRITICALITY; ENCAPSULATION; GROUTING; NOZZLES; PHOSPHORS; RADIOACTIVE WASTES; SLUDGES; URANIUM; WASTE FORMS