Cone penetrometer shear strength measurements of Hanford site sludge waste - 15314
- Washington River Protection Solutions, LLC Richland, Washington 99352 (United States)
In response to research examining the effect of gas production on the storage capacity of artificial sludge depots [1], a new mechanism was proposed for a spontaneous deep sludge gas release event (DSGRE) that had not been described in the Hanford Site Tank Farm safety basis [2]. Implementation of a new safety basis for Hanford Site sludge waste to address the DSGRE concern required showing that the waste maintains low gas fractions as settled solids depth is increased, which is directly related to the shear strength of the waste. Therefore, safety basis development involved determining the in situ shear strength of the sludge waste in C-Farm sludge accumulation Tanks 241-AN-101 (AN-101) and 241-AN-106 (AN-106). In situ measurements were taken in the sludge waste using a cone penetrometer with a 3-inch (76-mm) diameter ball attachment. Full-flow cone penetrometer measurements were taken in Tank AN-101 sludge waste in January 2014 and in Tank AN-106 in November 2013. Measurements in both AN-101 and AN-106 sludge demonstrated roughly uniform increasing undrained shear strength with increased depth, which was expected based on similar testing performed in soft, normally consolidated clays at test sites globally [3]. Comparison of in situ data to other soft-clay sites investigated with full-flow penetrometers suggests AN-101 and AN-106 sludge wastes do not behave differently in this regard than other normally consolidated clay or soil deposits, which supported revision of the safety basis to allow continuation of retrieval from C-Farm tanks. (authors)
- Research Organization:
- WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (United States)
- OSTI ID:
- 22822827
- Report Number(s):
- INIS-US-19-WM-15314; TRN: US19V0817067742
- Resource Relation:
- Conference: WM2015: Annual Waste Management Symposium, Phoenix, AZ (United States), 15-19 Mar 2015; Other Information: Country of input: France; 10 refs.; Available online at: http://archive.wmsym.org/2015/index.html
- Country of Publication:
- United States
- Language:
- English
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