1 st Response Submittal to the EPA Enclosure 1

1 EPA Comment 1 - 23 - 11 EQ3/6 and Supporting Files. Please provide the following computer files related to the actinide source term modeling calculations and the determination of the cumulative distribution functions for the actinide s olubilities: 1. The EQ3/6 database file DATA0.FM1 used for the CRA - 2014 solubility calculations, (also known as DATA0.FMT.R2). 2. EQ3/6 input and output files used for calculating actinide solubilities for the actinide source term at different brine volu mes (1x, 2x, 3x, 4x, 5x minimum brine volumes). 3. The Excel macro GetEQData.xls and all Excel spreadsheets that contain the output extracted with GetEQData.xls. 4. EQ3/6 input and output files used for calculating actinide solubilities for the +III and +IV actinide uncer tainty analysis calculations. 5. Excel macros GetEQData_v101e.xls and GetEQData_v101f.xls; and 6. Excel files Thorium_Uncertainty_Results_2014_PA.xls and Americium_Uncertainty _Results_2014_PA.xls. DOE Response The requested documentation is in cluded in Enclosure 2 . Use “Notepad” to access the requested files.1 st Response Submittal to the EPA Enclosure 1

2 EPA Comment 1 - 23 - 13 Missing Reference. Appendix SOTERM, Figure SOTERM - 7 caption cites Altmaier (2011) but this reference is missing from the reference list. Please provide this refer ence. DOE Response This is a typo graphical error in Appendix SOTERM . The text will be corrected to read “Altmaier et al., 2008” which is already included as a reference in Appendix SOTERM, given below. The requested reference is included in Enclosure 2 . Figure SOTERM - 7 is based on Figure 5 in this reference and shows the highest three CaCl 2 concentrations shown in the published Figure. This typographical error has been added to Enclosure 4, CRA - 2014 Errata Tracking . Reference Altmaier M., Neck, V., F anghänel, T., “Solubility of Zr(IV), Th(IV) and Pu(IV) hydrous oxides in CaCl2 solutions and the formation of ternary Ca - M - OH complexes,” Radiochimica Acta 96 , (2008).1 st Response Submittal to the EPA Enclosure 1

3 EPA Comment 1 - 24 - 4 Missing References. Please provide the following references: French, D. 2009. Analysis of Container Material Masses, INV - SAR - 19. Los Alamos National Laboratory - Car lsbad Operations, Carlsbad, NM. Los Alamos National Laboratory - Carlsbad Operations (LANL - CO) 2010. Analyses, LCOQP9 - Los Alamos National Laboratory - Car lsbad Operations, Carlsbad, NM. Los Alamos National Laboratory - Carlsbad Operations (LANL - CO) 2011a. Data Collection, Data Management, and Control for the Comprehensive Inventory, INV - SP - 01. Los Alamos National Laboratory - Carlsbad Operations, Carl sbad, NM. Los Alamos National Laboratory - Carlsbad Operations (LANL - CO) 2011b. Entry, Verification, and Validation of inventory Information in the Comprehensive Inventory Database, INV - SP - 02. Los Alamos National Laboratory - Carlsbad Operations, Carlsb ad, NM. Los Alamos National Laboratory - Carlsbad Operations (LANL - CO) 2011c. LANL - CO Software Quality Assurance Plan, LCO - QPD - 02. Los Alamos National Laboratory - Carlsbad Operations, Carlsbad, NM. Los Alamos National Laboratory - Carlsbad Operations (LANL - CO) 2011d. Software Quality Assurance, LCO - QP19 - 1. Los Alamos National Laboratory - Carlsbad Operations, Carlsbad, NM. Los Alamos National Laboratory - Carlsbad Operations (LANL - CO) 2011e. Comprehensive Inventory Database, Version 2.0, Schema Version S2.00, Data Version D.10.01. Los Alamos National Laboratory - Carlsbad Operations, Carlsbad, NM. Los Alamos National Laboratory - Carlsbad Operations (LANL - CO) 2012. Comprehensive Inventory Da tabase, Version 2.01, Schema Version S2.01, Data Version D.11.00. Los Alamos National Laboratory

- Carlsbad Operations, Carlsbad, NM. Chemical and Cement Components 2011 Inventory Estimates. LANL - CO. INV - SAR - 28, Revision 0, Novembe r 1, 2012. LANL - CO Recor d ID# INV

- 1211 - 01 - 01 - 01. Estimation of Cellulose, Plastic, and Rubber Emplacement Materials in the Waste Isolation Pilot Plant (WIPP). LANL - CO. INV

- SAR - 27, Revision 0, November 5, 2012. LANL - CO Record ID# INV - 1211 - 02 - 01 - 01.1 st Response Submittal to the EPA Enclosure 1

4 DOE Response The reques ted references are included in Enclosure 2 . Two references listed below are actual Comprehensive Inventory Database ( CID ) software and cannot be transmitted by email or disk. The DOE recommends that EPA visit the Los Alamos National Laboratory - Carlsbad O perations office to review the CID software. 1. Los Alamos National Laboratory - Carlsbad Operations (LANL - CO) 2011 e. Comprehensive Inventory Database, Version 2.0, Schema Version S2.00, Data Version 0.10.01. Los Alamos National Laboratory - Carlsbad Operatio ns, Carlsbad, NM. 2. Los Alamos National Laboratory - Carlsbad Operations (LANL - CO) 2012. Comprehensive Inventory Database, Version 2.01, Schema Version S2.01, Data Version D. 11.00. Los Alamos National Laboratory - Carlsbad Operations, Carlsbad, NM.1 st Response Submittal to the EPA Enclosure 1

5 EPA Comment 1 - G - 1 Reference Appendix QAPD - 2014 Not Provided. CRA - 2014 Section 23, Models and Computer Codes, Section 23.5.7 states, "The DOE's quality assurance program, as applied to the CRA - 2014, is contained in Appendix QAPD - 2014." The appendix has no t been provided. Please provide this document. DOE Response Th ere was not an Appendix QAPD - 2014 in the CRA - 2014; therefore, the statement above is a typo graphical error in CRA - 2014 Section 23.5.7. The reference to Quality Ass urance Program Document (QAPD) will be added to Section 23 References and the t ext will be corrected to read , “The DOE's quality assurance program, as applied to the CRA - 2014, is contained in the Quality Assurance Program Document (U.S. DOE 2010 ) . " The QAPD is already included as a reference in the CRA - 2014 ; however, a copy of the QAPD is included in Enclosure 2 . This typographical error has been added to Enclosure 4, CRA - 2014 Errata Tracking . Reference U.S. Department of Energy (DOE) 2010. Quality Assurance Program Document , DOE/CBFO - 94 - 1012, Revision 11 . Carlsbad Field Office, Carlsbad, NM.1 st Response Submittal to the EPA Enclosure 1

6 EPA Comment 1 - G - 2 Codes IDs Do Not Include Source Code Listing. CRA - 2014 Section 23, Models and Computer Codes, Section 23.8.7 states, "The IDs include s ource - code listings..." EPA examined a number of code Implementation Documents; they include a reference to the location of the source - code listing, but not the actual listing of the code. Please provide the source - code listing for the following CRA - 2014 c odes: BRAGFLO 6.02, MATSET 9.20, CCDFGF 6.0. DOE Response The requested documentation is included in Enclosure 2 . Use “Notepad” to access the requested files.1 st Response Submittal to the EPA Enclosure 1

7 EPA Comment 1 - G - 3 New Codes EQ3/6 and JAS3D Documentation Incomplete. DOE states in CRA - 2014 Section 23, 23.7.7, "The documentation for the new codes EQ3/6 and JAS3D may be found in their respective UM, AP, VD, ID, and RD/VVP." It does not appear that this documentation has been included in CRA - 2014. Please provide this docu mentation. DOE Response The requested documentation is included in Enclosure 2 .