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Title: Test plan for techniques to measure and remove coatings from K West Basin fuel elements

Several types of coatings have previously been visually identified on the surface of 105-K East and 105-K West Basins fuel elements. One type of coating (found only in K West Basin) in particular was found to be a thick translucent material that was often seen to be dislodged from the elements as flakes when the elements were handled during visual examinations (Pitner 1997). Subsequently it was determined (for one element only in a hot cell) that this material, in the dry condition, could easily be removed from the element using a scraping tool. The coating was identified as Al(OH){sub 3} through X-ray diffraction (XRD) analyses and to be approximately 60 {micro}m thick via scanning electron microscopy (SEM). However, brushing under water in the basin using numerous mechanical strokes failed to satisfactorily remove these coatings in their thickest form as judged by appearance. Such brushing was done with only one type of metal brush, a brush design previously found satisfactory for removing UO{sub 4}.xH{sub 2}O coatings from the elements.
Authors:
Publication Date:
OSTI Identifier:
362487
Report Number(s):
HNF--2440
ON: DE99050723; BR: EW7040000; TRN: AHC29926%%142
DOE Contract Number:
AC06-96RL13200
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 17 Jun 1998
Research Org:
Fluor Daniel Hanford Inc., Richland, WA (United States)
Sponsoring Org:
USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; HANFORD RESERVATION; FUEL STORAGE POOLS; FUEL ELEMENTS; COATINGS; REMOVAL; ALUMINIUM HYDROXIDES