#
# arev:/usr/local/unicat/unireq/beamreq/req00109.txt
# UNICAT Member Beam Time Request  #109

# created Thu Mar 30 12:01:52 CST 2000
#

collaboration:
	Yes

days:
	1

description:
	Groundwater-borne colloids have the potential to transport radioactive
	contaminants from a waste storage or disposal site. These radionuclide-
	bearing colloids, generated from the corrosion of commercial spent nuclear
	fuel and high level waste glass, are expected to be the focus of intense
	future studies. To understand the transport of colloids, it is necessary to
	characterize the solution-borne colloids that form during degradation of the
	waste forms, specifically as related to actinide releases.
	
	We propose to use USAXS to characterize several colloid systems that are
	related to known or suspected agents in radionuclide release from glass waste
	forms. We will use non-hazardous surrogate elements (such as cerium or
	ytterbium).  If time permits, we may monitor the rates of aggregation in the
	system. The particles should start to aggregate within 1 hr or so. If
	possible we should try to run these until the mean diameter approaches 1 %B5m.
	

equipment+required:
	USAXS, liquid sample cells

experiment:
	USAXS of Potential Groundwater-Borne Colloids in Geologic Repository

hazards:
	No hazards.
	Samples will be prepared at ANL/CTD prior to experiments.
	Samples will be loaded into liquid cells in UNICAT chem lab.

name:
	Pete Jemian

new+request:
	on

nonmembers:
	Jeffrey A. Fortner, ANL CTD
	Carol J. Mertz, ANL CTD
	Edgar C. Buck, ANL CTD
	

station:
	33ID-D

unacceptable+dates:
	I am unavailable May 10 - May 14 and evening of May 24.
	This experiment is best scheduled in conjunction with a "batch" of USAXS experiments.  
	Such as immediately following request #105.
	



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