{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/98301"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/98301","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Characterization of pressurized wash for decontamination of porous building materials and a Goldsim model for recycling contaminated wash","abstract":"Made available in DSpace on 2017-09-29T17:52:27Z (GMT). No. of bitstreams: 2 HEPLER-THESIS-2017.pdf: 3041434 bytes, checksum: cf23c087f91157c6b695c956754033fd (MD5) LICENSE.txt: 4213 bytes, checksum: b92a7eeb5410088e53d0e987f7bbe16f (MD5) Previous issue date: 2017-07-20","abstract_html":"Made available in DSpace on 2017-09-29T17:52:27Z (GMT). No. of bitstreams: 2 HEPLER-THESIS-2017.pdf: 3041434 bytes, checksum: cf23c087f91157c6b695c956754033fd (MD5) LICENSE.txt: 4213 bytes, checksum: b92a7eeb5410088e53d0e987f7bbe16f (MD5) Previous issue date: 2017-07-20","abstract_has_math":false,"creators":["Hepler, Katherine C"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Nuclear, Plasma, Radiolgc Engr","degree_department":null,"school":null,"contributors":["Kaminski, Michael D.","Roy, William"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017-09-29T17:52:27Z","date_published":"2017-09-29T17:52:27Z","updated_at":"2026-07-22T22:24:35Z","subjects":["Radiological contamination","Decontamination","Pressurized wash","Remediation"],"languages":["en"],"rights":["Copyright 2017 Katherine Hepler"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/98301","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Kaminski, Michael D.","Roy, William"]},{"key":"dc:creator","label":"Author","values":["Hepler, Katherine C"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2017-09-29T17:52:27Z","2019-09-30T09:15:23Z","2017-07-20","2017-08"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Nuclear, Plasma, Radiolgc Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Radiological contamination","Decontamination","Pressurized wash","Remediation"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2017 Katherine Hepler"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/98301"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Made available in DSpace on 2017-09-29T17:52:27Z (GMT). No. of bitstreams: 2 HEPLER-THESIS-2017.pdf: 3041434 bytes, checksum: cf23c087f91157c6b695c956754033fd (MD5) LICENSE.txt: 4213 bytes, checksum: b92a7eeb5410088e53d0e987f7bbe16f (MD5) Previous issue date: 2017-07-20","Embargo set by: Colleen Fallaw for item 103509 Lift date: 2019-09-29T17:52:45Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited Restriction Lifted for Item 103509 on 2019-09-30T09:15:23Z.","The probability of a terrorist attack with a Radiological Dispersion Device (RDD) is unknown, response and recovery plans must be created beforehand to minimize the detrimental economic, social, and psychological effects of wide-spread nuclear contamination. In 2014 the IWATERS system was proposed for quick, non-destructive remediation of the urban environment. An ionic wash solution (“Wash Aid”) is applied by hosing and then used wash solution is recycled on-site with sand-clay beds. The following experiments were performed to help characterize the IWATERS technology. The HUDEX (High-pressure Urban Decontamination EXperiments) system applied a pressurized wash solution with a 40° nozzle to Sr-85, Cs-137, and Eu-152 contaminated brick, asphalt, and concrete. Statistically significant increases in percent removals were observed using a nominal 0.5 M KCl solution vs. tap water (20-40% difference for majority). Highest decontamination was 84.6% Sr from asphalt with 0.5 M KCl. Tests varying cleaning rate and distance on concrete with tap water yielded insignificant trends (8%-45% average removals). Depth profiles of the remaining contamination were determined after cleaning from the 15-cm distance. By using sand paper to remove layers from the coupon, the relative fraction activity removed in each layer was plotted vs. depth. Consistently, Cs and Sr penetrated significantly deeper than Eu, with Sr penetrating slightly more than Cs. Relatively small grind layers (17 to 35 μm vs. 1 to 7 mm) made literature comparison difficult. More tests are needed to determine effects of pressurized washing on contamination depth profiles. A GoldSim Contaminant Transport model for recycling contaminated wash solution through a sand/clay column was modified for sensitivity analyses of column and material parameters. Linear or quadratic relationships (R2 ≥ 0.98) were observed between most column parameters and breakthrough time and total volume of wash solution processed. Using the relationships, look-up tables for first responders and equations for on-the-fly modifications can be generated. Changes to the sand/clay bed composition yielded mostly non-linear trends for both total volume recycled and elution time. Therefore, in a response scenario, the composition must be set beforehand. Parameters such as bed area and head height are more easily changed to total recycled wash solution and recycling rate.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2019-08-01","The student, Katherine Hepler, accepted the attached license on 2017-07-19 at 09:20.","The student, Katherine Hepler, submitted this Thesis for approval on 2017-07-19 at 09:43.","This Thesis was approved for publication on 2017-07-20 at 17:04.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11522 on 2017-09-29 at 11:19:47"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Characterization of pressurized wash for decontamination of porous building materials and a Goldsim model for recycling contaminated wash"]}]}],"canonical_facts":{"dc:contributor":["Kaminski, Michael D.","Roy, William"],"dc:creator":["Hepler, Katherine C"],"dc:date":["2017-09-29T17:52:27Z","2019-09-30T09:15:23Z","2017-07-20","2017-08"],"dc:description":["Made available in DSpace on 2017-09-29T17:52:27Z (GMT). No. of bitstreams: 2 HEPLER-THESIS-2017.pdf: 3041434 bytes, checksum: cf23c087f91157c6b695c956754033fd (MD5) LICENSE.txt: 4213 bytes, checksum: b92a7eeb5410088e53d0e987f7bbe16f (MD5) Previous issue date: 2017-07-20","Embargo set by: Colleen Fallaw for item 103509 Lift date: 2019-09-29T17:52:45Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited Restriction Lifted for Item 103509 on 2019-09-30T09:15:23Z.","The probability of a terrorist attack with a Radiological Dispersion Device (RDD) is unknown, response and recovery plans must be created beforehand to minimize the detrimental economic, social, and psychological effects of wide-spread nuclear contamination. In 2014 the IWATERS system was proposed for quick, non-destructive remediation of the urban environment. An ionic wash solution (“Wash Aid”) is applied by hosing and then used wash solution is recycled on-site with sand-clay beds. The following experiments were performed to help characterize the IWATERS technology. The HUDEX (High-pressure Urban Decontamination EXperiments) system applied a pressurized wash solution with a 40° nozzle to Sr-85, Cs-137, and Eu-152 contaminated brick, asphalt, and concrete. Statistically significant increases in percent removals were observed using a nominal 0.5 M KCl solution vs. tap water (20-40% difference for majority). Highest decontamination was 84.6% Sr from asphalt with 0.5 M KCl. Tests varying cleaning rate and distance on concrete with tap water yielded insignificant trends (8%-45% average removals). Depth profiles of the remaining contamination were determined after cleaning from the 15-cm distance. By using sand paper to remove layers from the coupon, the relative fraction activity removed in each layer was plotted vs. depth. Consistently, Cs and Sr penetrated significantly deeper than Eu, with Sr penetrating slightly more than Cs. Relatively small grind layers (17 to 35 μm vs. 1 to 7 mm) made literature comparison difficult. More tests are needed to determine effects of pressurized washing on contamination depth profiles. A GoldSim Contaminant Transport model for recycling contaminated wash solution through a sand/clay column was modified for sensitivity analyses of column and material parameters. Linear or quadratic relationships (R2 ≥ 0.98) were observed between most column parameters and breakthrough time and total volume of wash solution processed. Using the relationships, look-up tables for first responders and equations for on-the-fly modifications can be generated. Changes to the sand/clay bed composition yielded mostly non-linear trends for both total volume recycled and elution time. Therefore, in a response scenario, the composition must be set beforehand. Parameters such as bed area and head height are more easily changed to total recycled wash solution and recycling rate.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2019-08-01","The student, Katherine Hepler, accepted the attached license on 2017-07-19 at 09:20.","The student, Katherine Hepler, submitted this Thesis for approval on 2017-07-19 at 09:43.","This Thesis was approved for publication on 2017-07-20 at 17:04.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11522 on 2017-09-29 at 11:19:47"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/98301"],"dc:language":["en"],"dc:rights":["Copyright 2017 Katherine Hepler"],"dc:subject":["Radiological contamination","Decontamination","Pressurized wash","Remediation"],"dc:title":["Characterization of pressurized wash for decontamination of porous building materials and a Goldsim model for recycling contaminated wash"],"dc:type":["text"],"thesis:degree_discipline":["Nuclear, Plasma, Radiolgc Engr"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:35Z"}