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Title: Evaluation of proposed panel closure modifications at WIPP

Abstract

A key component in the design of the WIPP repository is the installation of concrete structures as panel seals in the intake and exhaust drifts after a panel has been filled with waste containers. As noted in the EPA final rule, the panel seal closure system is intended to block brine flow between the waste panels at the WIPP. On April 17, 2001, the DOE proposed seven modifications to the EPA concerning the design of the panel closure system. EPA approval of these modifications is necessary since the details of the panel design are specified in EPA’s final rule as a condition for WIPP certification. However, the EPA has not determined whether a rulemaking would be required for these proposed design modifications. On September 4, 2001, the DOE withdrew the request, noting that it would be resubmitted on a future date. The Environmental Evaluation Group (EEG) contracted with two engineers, Dr. John Abel and Dr. Rusty Morgan, to evaluate the proposed modifications. The EEG has accepted the conclusions and recommendations from these two experts: 1) replacement of Salado Mass Concrete with a generic salt-based concrete; 2) replacement of the explosion wall with a construction wall; 3) replacement of freshwater groutingmore » with salt-based grouting; 4) option to allow surface or underground mixing; and 5) option to allow up to one year for completion of closure. The proposed modification to allow local carbonate river rock as aggregate is acceptable pending demonstration that no problems will exist in the resulting concrete. The proposed modification to give the contractor discretion in removal of steel forms is not supported. Instead, several recommendations are made to specifically reduce the number of forms left, thereby reducing potential migration pathways.« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
Environmental Evaluation Group, Albuquerque, NM (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
1195512
Report Number(s):
EEG-82; DOE/AL/58309-82
DOE Contract Number:  
ACO4- 89AL58309
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Allen, Lawrence E., Silva, Matthew K., Channell, James K., Abel, John F., and Morgan, Dudley R. Evaluation of proposed panel closure modifications at WIPP. United States: N. p., 2001. Web. doi:10.2172/1195512.
Allen, Lawrence E., Silva, Matthew K., Channell, James K., Abel, John F., & Morgan, Dudley R. Evaluation of proposed panel closure modifications at WIPP. United States. https://doi.org/10.2172/1195512
Allen, Lawrence E., Silva, Matthew K., Channell, James K., Abel, John F., and Morgan, Dudley R. Mon . "Evaluation of proposed panel closure modifications at WIPP". United States. https://doi.org/10.2172/1195512. https://www.osti.gov/servlets/purl/1195512.
@article{osti_1195512,
title = {Evaluation of proposed panel closure modifications at WIPP},
author = {Allen, Lawrence E. and Silva, Matthew K. and Channell, James K. and Abel, John F. and Morgan, Dudley R.},
abstractNote = {A key component in the design of the WIPP repository is the installation of concrete structures as panel seals in the intake and exhaust drifts after a panel has been filled with waste containers. As noted in the EPA final rule, the panel seal closure system is intended to block brine flow between the waste panels at the WIPP. On April 17, 2001, the DOE proposed seven modifications to the EPA concerning the design of the panel closure system. EPA approval of these modifications is necessary since the details of the panel design are specified in EPA’s final rule as a condition for WIPP certification. However, the EPA has not determined whether a rulemaking would be required for these proposed design modifications. On September 4, 2001, the DOE withdrew the request, noting that it would be resubmitted on a future date. The Environmental Evaluation Group (EEG) contracted with two engineers, Dr. John Abel and Dr. Rusty Morgan, to evaluate the proposed modifications. The EEG has accepted the conclusions and recommendations from these two experts: 1) replacement of Salado Mass Concrete with a generic salt-based concrete; 2) replacement of the explosion wall with a construction wall; 3) replacement of freshwater grouting with salt-based grouting; 4) option to allow surface or underground mixing; and 5) option to allow up to one year for completion of closure. The proposed modification to allow local carbonate river rock as aggregate is acceptable pending demonstration that no problems will exist in the resulting concrete. The proposed modification to give the contractor discretion in removal of steel forms is not supported. Instead, several recommendations are made to specifically reduce the number of forms left, thereby reducing potential migration pathways.},
doi = {10.2172/1195512},
url = {https://www.osti.gov/biblio/1195512}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {12}
}