PNNL

Amy Westesen is a chemical engineer in the Nuclear Sciences Division at Pacific Northwest National Laboratory. She has been extensively involved with the Radioactive Waste Test Platform, conducting testing with both actual and simulated Hanford tank waste.

• Chemical Process Engineering
• Filtration
• Ion Exchange
• Simulant Development
• Tank Waste Chemistry

BS, chemical engineering, Montana State University

2022

Allred J.R., E.C. Buck, C. Burns, R.C. Daniel, J. Geeting, Z.B. Webb, and A.M. Westesen, et al. 2022. Fiscal Year 2022 Filtration of Hanford Tank 241-AP-101 Supernatant at 16 °C. PNNL-32851. Richland, WA: Pacific Northwest National Laboratory. Fiscal Year 2022 Filtration of Hanford Tank 241-AP-101 Supernatant at 16 °C

Shimskey R.W., J.R. Allred, S.E. Asmussen, S.K. Cooley, R.C. Daniel, L.H. Dinh, and M.K. Edwards, et al. 2022. PNNL FY2021 Sibling Pin Testing Results. PNNL-32783. Richland, WA: Pacific Northwest National Laboratory. PNNL FY2021 Sibling Pin Testing Results

Westesen A.M., E.L. Campbell, A.N. Williams, A.M. Carney, T. Trang-Le, and R.A. Peterson. 2022. Reduced Temperature Cesium Removal from AP-101 Using Crystalline Silicotitanate. PNNL-32911. Richland, WA: Pacific Northwest National Laboratory. Reduced Temperature Cesium Removal from AP-101 Using Crystalline Silicotitanate

Westesen A.M., E.L. Campbell, S.K. Fiskum, and R.A. Peterson. 2022. "Evaluation of load behavior for select analytes in Hanford tank waste." Industrial and Engineering Chemistry Research 61, no. 32:11691-11698. PNNL-SA-172935. doi:10.1021/acs.iecr.2c01656

2021

Allred J.R., J. Geeting, A.M. Westesen, E.C. Buck, and R.A. Peterson. 2021. Fiscal Year 2021 Filtration of Hanford Tank 241-AP-107 Supernatant Samples Obtained at Prototypic Tank Level and Filtered at 16 °C. PNNL-31557. Richland, WA: Pacific Northwest National Laboratory. Fiscal Year 2021 Filtration of Hanford Tank 241-AP-107 Supernatant Samples Obtained at Prototypic Tank Level and Filtered at 16 °C

Dixon D.R., A.M. Westesen, M.A. Hall, C.M. Stewart, J.B. Lang, D.A. Cutforth, and W.C. Eaton, et al. 2021. Vitrification of Hanford Tank Wastes for Condensate Recycle and Feed Composition Changeover Testing. PNNL-32344. Richland, WA: Pacific Northwest National Laboratory. Vitrification of Hanford Tank Wastes for Condensate Recycle and Feed Composition Changeover Testing

Fiskum S.K., A.M. Westesen, A.M. Carney, T. Trang-Le, and R.A. Peterson. 2021. Ion Exchange Processing of AP-105 Hanford Tank Waste through Crystalline Silicotitanate in a Staged 2- then 3-Column System. PNNL-30712. Richland, WA: Pacific Northwest National Laboratory. Ion Exchange Processing of AP-105 Hanford Tank Waste through Crystalline Silicotitanate in a Staged 2- then 3-Column System

Fiskum S.K., A.M. Westesen, and R.A. Peterson. 2021. Spent Crystalline Silicotitanate Storage Study-Post AP-105DF Processing. PNNL-30730 Rev 1. Richland, WA: Pacific Northwest National Laboratory. Spent Crystalline Silicotitanate Storage Study-Post AP-105DF Processing

Fiskum S.K., A.M. Westesen, and R.A. Peterson. 2021. Spent Crystalline Silicotitanate Storage Study-Post AP-105DF Processing. PNNL-30730. Richland, WA: Pacific Northwest National Laboratory. Spent Crystalline Silicotitanate Storage Study-Post AP-105DF Processing

Westesen A.M., S.K. Fiskum, A.M. Carney, E.L. Campbell, T. Trang-Le, and R.A. Peterson. 2021. Reduced Temperature Cesium Removal from AP-107 Using Crystalline Silicotitanate. PNNL-31868. Richland, WA: Pacific Northwest National Laboratory. Reduced Temperature Cesium Removal from AP-107 Using Crystalline Silicotitanate

Westesen A.M., S.K. Fiskum, H.A. Colburn, J.R. Allred, M.R. Smoot, and R.A. Peterson. 2021. Cesium Ion Exchange Testing Using Crystalline Silicotitanate with Hanford Tank Waste 241-AP-107. PNNL-27706 Rev 1. Richland, WA: Pacific Northwest National Laboratory. Cesium Ion Exchange Testing Using Crystalline Silicotitanate with Hanford Tank Waste 241-AP-107

Westesen A.M., S.K. Fiskum, T. Trang-Le, A.M. Carney, R.A. Peterson, M.R. Landon, and K.A. Colosi. 2021. "Small to Full-Height Scale Comparisons of Cesium Ion Exchange Performance with Crystalline Silicotitanate." Solvent Extraction and Ion Exchange 39, no. 1:104-122. PNNL-SA-152428. doi:10.1080/07366299.2020.1831142

2020

Allred J.R., J. Geeting, A.M. Westesen, E.C. Buck, and R.A. Peterson. 2020. Fiscal Year 2020 Filtration of Hanford Tank Waste 241-AP-105. PNNL-30485. Richland, WA: Pacific Northwest National Laboratory. Fiscal Year 2020 Filtration of Hanford Tank Waste 241-AP-105

Campbell E.L., A.M. Westesen, F. Cintron Colon, D. Boglaienko, T.G. Levitskaia, and R.A. Peterson. 2020. "Elemental Characterization of Crystalline Silicotitanate Following Hanford Tank Waste Processing." Separation Science and Technology 56, no. 8:1457-1465. PNNL-SA-152594. doi:10.1080/01496395.2020.1777429

Dixon D.R., A.M. Westesen, M.A. Hall, C.M. Stewart, J.B. Lang, D.A. Cutforth, and W.C. Eaton, et al. 2020. Vitrification of Hanford Tank 241-AP-107 with Recycled Condensate. PNNL-30189. Richland, WA: Pacific Northwest National Laboratory. Vitrification of Hanford Tank 241-AP-107 with Recycled Condensate

Westesen A.M., E.L. Campbell, G.J. Lumetta, S.K. Fiskum, and R.A. Peterson. 2020. Modified Isotherm Modeling to Predict Cs Exchange with Crystalline Silicotitanate in Tank Waste Simulants. PNNL-30212. Richland, WA: Pacific Northwest National Laboratory. Modified Isotherm Modeling to Predict Cs Exchange with Crystalline Silicotitanate in Tank Waste Simulants

Westesen A.M., S.K. Fiskum, T. Trang-Le, A.M. Carney, and R.A. Peterson. 2020. Small to Full Height Scale Comparisons of Cesium Ion Exchange Performance with Crystalline Silicotitanate. PNNL-30142. Richland, WA: Pacific Northwest National Laboratory. Small to Full Height Scale Comparisons of Cesium Ion Exchange Performance with Crystalline Silicotitanate

2019

Dixon D.R., C.M. Stewart, J.J. Venarsky, J.A. Peterson, G.B. Hall, T.G. Levitskaia, and J.R. Allred, et al. 2019. Vitrification of Hanford Tank Waste 241-AP-107 in a Continuous Laboratory-Scale Melter. PNNL-28361. Richland, WA: Pacific Northwest National Laboratory. Vitrification of Hanford Tank Waste 241-AP-107 in a Continuous Laboratory-Scale Melter

Fiskum S.K., A.M. Rovira, H.A. Colburn, A.M. Carney, and R.A. Peterson. 2019. Cesium Ion Exchange Testing Using a Three-Column System with Crystalline Silicotitanate and Hanford Tank Waste 241-AP-107. PNNL-28958, Rev. 0. Richland, WA: Pacific Northwest National Laboratory. Cesium Ion Exchange Testing Using a Three-Column System with Crystalline Silicotitanate and Hanford Tank Waste 241-AP-107

Fiskum S.K., A.M. Rovira, J.R. Allred, H.A. Colburn, M.R. Smoot, A.M. Carney, and T. Trang-Le, et al. 2019. Cesium Removal from Tank Waste Simulants Using Crystalline Silicotitanate at 12% and 100% TSCR Bed Heights. PNNL-28527. Richland, WA: Pacific Northwest National Laboratory. Cesium Removal from Tank Waste Simulants Using Crystalline Silicotitanate at 12% and 100% TSCR Bed Heights

Fiskum S.K., A.M. Rovira, M.G. Cantaloub, A.M. Carney, H.A. Colburn, R.A. Peterson, and B.D. Pierson. 2019. Impact of Crystalline Silicotitanate Particle Size on Cesium Removal Efficiency. PNNL-29273. Richland, WA: Pacific Northwest National Laboratory. Impact of Crystalline Silicotitanate Particle Size on Cesium Removal Efficiency

Fiskum S.K., H.A. Colburn, A.M. Rovira, J.R. Allred, M.R. Smoot, R.A. Peterson, and M.R. Landon, et al. 2019. "Cesium Removal from AP-105 Hanford Tank Waste Using Spherical Resorcinol Formaldehyde Resin." Separation Science and Technology 54, no. 12:1932-1941. PNNL-SA-138559. doi:10.1080/01496395.2019.1577273

Geeting J., J.R. Allred, A.M. Rovira, and R.A. Peterson. 2019. Fiscal Year 2019 Filtration of Hanford Tank AP-107 Supernatant. PNNL-28780. Richland, WA: Pacific Northwest National Laboratory. Fiscal Year 2019 Filtration of Hanford Tank AP-107 Supernatant

Rovira A.M., J. Geeting, J.R. Allred, R.W. Shimskey, C. Burns, R.A. Peterson, and K.A. Colosi. 2019. "Media Comparison of Filtration with Hanford Tank AP-107 Supernate." Separation Science and Technology 54, no. 12:1912-1921. PNNL-SA-138682. doi:10.1080/01496395.2019.1575419

Rovira A.M., S.K. Fiskum, H.A. Colburn, J.R. Allred, M.R. Smoot, R.A. Peterson, and K.A. Colosi. 2019. "Cesium Ion Exchange Testing Using Crystalline Silicotitanate with Hanford Tank Waste 241-AP-107." Separation Science and Technology 54, no. 12:1942-1951. PNNL-SA-138733. doi:10.1080/01496395.2019.1577895

Rovira A.M., S.K. Fiskum, J.R. Allred, J. Geeting, H.A. Colburn, A.M. Carney, and T. Trang-Le, et al. 2019. Dead-End Filtration and Crystalline Silicotitanate Cesium Ion Exchange with Hanford Tank Waste AW-102. PNNL-28783. Richland, WA: Pacific Northwest National Laboratory. Dead-End Filtration and Crystalline Silicotitanate Cesium Ion Exchange with Hanford Tank Waste AW-102

2018

Dixon D.R., C.M. Stewart, J.J. Venarsky, J.A. Peterson, G.B. Hall, T.G. Levitskaia, and J.R. Allred, et al. 2018. Vitrification of Hanford Tank Waste 241-AP-105 in a Continuous Laboratory-Scale Melter. PNNL-27775. Richland, WA: Pacific Northwest National Laboratory.

Fiskum S.K., H.A. Colburn, R.A. Peterson, A.M. Rovira, and M.R. Smoot. 2018. Cesium Ion Exchange Using Crystalline Silicotitanate with 5.6 M Sodium Simulant. PNNL-27587. Richland, WA: Pacific Northwest National Laboratory. Cesium Ion Exchange Using Crystalline Silicotitanate with 5.6 M Sodium Simulant

Fiskum S.K., J.R. Allred, H.A. Colburn, A.M. Rovira, M.R. Smoot, and R.A. Peterson. 2018. Multi-Cycle Cesium Ion Exchange Testing Using Spherical Resorcinol-Formaldehyde Resin with Diluted Hanford Tank Waste 241-AP-105. PNNL-27432. Richland, WA: Pacific Northwest National Laboratory. Multi-Cycle Cesium Ion Exchange Testing Using Spherical Resorcinol-Formaldehyde Resin with Diluted Hanford Tank Waste 241-AP-105

Geeting J., A.M. Rovira, J.R. Allred, R.W. Shimskey, C. Burns, and R.A. Peterson. 2018. Filtration of Hanford Tank AP-107 Supernatant. PNNL-27638;RPT-DFTP-009, Rev. 0. Richland, WA: Pacific Northwest National Laboratory.

Geeting J., J.R. Allred, A.M. Rovira, R.W. Shimskey, C. Burns, and R.A. Peterson. 2018. Crossflow Filtration of Hanford Tank AP-105 Supernatant. PNNL-27085. Richland, WA: Pacific Northwest National Laboratory. Crossflow Filtration of Hanford Tank AP-105 Supernatant

Rovira A.M., S.K. Fiskum, H.A. Colburn, J.R. Allred, M.R. Smoot, and R.A. Peterson. 2018. Cesium Ion Exchange Testing Using Crystalline Silicotitanate with Hanford Tank Waste 241-AP-107. PNNL-27706. Richland, WA: Pacific Northwest National Laboratory. Cesium Ion Exchange Testing Using Crystalline Silicotitanate with Hanford Tank Waste 241-AP-107