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Title: A Method to Evaluate Additional Waste Forms to Optimize Performance of the HLW Repository

Abstract

The DOE high-level waste (HLW) disposal system is based on decisions made in the 1970s. The de facto Yucca Mountain WAC for HLW, contained in the Waste Acceptance System Requirements Document (WASRD), and the DOE-EM Waste Acceptance Product Specification for Vitrified High Level Waste Forms (WAPS) tentatively describes waste forms to be interred in the repository, and limits them to borosilicate glass (BSG). It is known that many developed waste forms are as durable as or better than environmental assessment or “EA”-glass. Among them are the salt-ceramic and metallic waste forms developed at ANL-W. Also, iron phosphate glasses developed at University of Missouri show promise in stabilizing the most refractory materials in Hanford HLW. However, for any of this science to contribute, the current Total System Performance Assessment model must be able to evaluate the additional waste form to determine potential impacts on repository performance. The results can then support the technical bases required in the repository license application. A methodology is proposed to use existing analysis models to evaluate potential additional waste forms for disposal without gathering costly material specific degradation data. The concept is to analyze the potential impacts of waste form chemical makeup on repository performance assumingmore » instantaneous waste matrix dissolution. This assumption obviates the need for material specific degradation models and is based on the relatively modest fractional contribution DOE HLW makes to the repository radionuclide and hazardous metals inventory. The existing analysis models, with appropriate data modifications, are used to evaluate geochemical interactions and material transport through the repository. This methodology would support early screening of proposed waste forms through simplified evaluation of disposal performance, and would provide preliminary guidance for repository license amendment in the future.« less

Authors:
;
Publication Date:
Research Org.:
Idaho National Laboratory (INL)
Sponsoring Org.:
DOE - EM
OSTI Identifier:
911586
Report Number(s):
INL/CON-05-00663
TRN: US0800024
DOE Contract Number:  
DE-AC07-99ID-13727
Resource Type:
Conference
Resource Relation:
Conference: WM '06,Tuscon, Arizona,02/26/2006,03/02/2006
Country of Publication:
United States
Language:
English
Subject:
54 - ENVIRONMENTAL SCIENCES; BOROSILICATE GLASS; DISSOLUTION; EVALUATION; IRON PHOSPHATES; LICENSE APPLICATIONS; MISSOURI; MODIFICATIONS; PERFORMANCE; RADIOISOTOPES; SPECIFICATIONS; TRANSPORT; WASTE FORMS; WASTES; YUCCA MOUNTAIN; disposal; high-level waste disposal system; waste

Citation Formats

D. Gombert, and L. Lauerhass. A Method to Evaluate Additional Waste Forms to Optimize Performance of the HLW Repository. United States: N. p., 2006. Web.
D. Gombert, & L. Lauerhass. A Method to Evaluate Additional Waste Forms to Optimize Performance of the HLW Repository. United States.
D. Gombert, and L. Lauerhass. Wed . "A Method to Evaluate Additional Waste Forms to Optimize Performance of the HLW Repository". United States. https://www.osti.gov/servlets/purl/911586.
@article{osti_911586,
title = {A Method to Evaluate Additional Waste Forms to Optimize Performance of the HLW Repository},
author = {D. Gombert and L. Lauerhass},
abstractNote = {The DOE high-level waste (HLW) disposal system is based on decisions made in the 1970s. The de facto Yucca Mountain WAC for HLW, contained in the Waste Acceptance System Requirements Document (WASRD), and the DOE-EM Waste Acceptance Product Specification for Vitrified High Level Waste Forms (WAPS) tentatively describes waste forms to be interred in the repository, and limits them to borosilicate glass (BSG). It is known that many developed waste forms are as durable as or better than environmental assessment or “EA”-glass. Among them are the salt-ceramic and metallic waste forms developed at ANL-W. Also, iron phosphate glasses developed at University of Missouri show promise in stabilizing the most refractory materials in Hanford HLW. However, for any of this science to contribute, the current Total System Performance Assessment model must be able to evaluate the additional waste form to determine potential impacts on repository performance. The results can then support the technical bases required in the repository license application. A methodology is proposed to use existing analysis models to evaluate potential additional waste forms for disposal without gathering costly material specific degradation data. The concept is to analyze the potential impacts of waste form chemical makeup on repository performance assuming instantaneous waste matrix dissolution. This assumption obviates the need for material specific degradation models and is based on the relatively modest fractional contribution DOE HLW makes to the repository radionuclide and hazardous metals inventory. The existing analysis models, with appropriate data modifications, are used to evaluate geochemical interactions and material transport through the repository. This methodology would support early screening of proposed waste forms through simplified evaluation of disposal performance, and would provide preliminary guidance for repository license amendment in the future.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {2}
}

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