{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/43927"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/43927","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Neutron radiography with the VPI & SU research reactor","abstract":"A feasibility study to determine the feasibility of neutron radiography with the VPI & SU Research Reactor has been completed. Various experimental facilities of the reactor were tested to determine which gave the best beam parameters. The beam parameters considered were: 1) thermal neutron flux; 2) thermal to fast-flux ratio; 3) gamma vs neutron relative film exposure ratio; 4) collimator length vs diameter ratio. It was found that the north beam port best met the necessary requirements. The direct exposure method utilizing a commercially available gadolinium paint was decided upon for X-ray film exposure. The resolution capabilities of the gadolinium paint converter screen were determined for several screen thicknesses using a cadmium test object. Exposure times and object limitations were found for the combination of the X-ray film, converter screen, and neutron beam of the north beam port. The test devices used were: 1) various thicknesses of acrylic plastic; 2) plywood and white pine test pieces; 3) thorium and natural uranium slugs; 4) enriched uranium fuel plate; 5) used and unused boral control elements; 6) miscellaneous small test objects. The results were, in general, good. Exposure times and limitations were found to be in agreement with other published works. Any significant differences in the technique's capability with other facilities were noted in the discussion of procedures and results. From the results of this work, neutron radiography can be successfully carried out on the VPI & SU reactor with small objects while further development should allow studies to be made of larger objects.","abstract_html":"A feasibility study to determine the feasibility of neutron radiography with the VPI & SU Research Reactor has been completed. Various experimental facilities of the reactor were tested to determine which gave the best beam parameters. The beam parameters considered were: 1) thermal neutron flux; 2) thermal to fast-flux ratio; 3) gamma vs neutron relative film exposure ratio; 4) collimator length vs diameter ratio. It was found that the north beam port best met the necessary requirements. The direct exposure method utilizing a commercially available gadolinium paint was decided upon for X-ray film exposure. The resolution capabilities of the gadolinium paint converter screen were determined for several screen thicknesses using a cadmium test object. Exposure times and object limitations were found for the combination of the X-ray film, converter screen, and neutron beam of the north beam port. The test devices used were: 1) various thicknesses of acrylic plastic; 2) plywood and white pine test pieces; 3) thorium and natural uranium slugs; 4) enriched uranium fuel plate; 5) used and unused boral control elements; 6) miscellaneous small test objects. The results were, in general, good. Exposure times and limitations were found to be in agreement with other published works. Any significant differences in the technique's capability with other facilities were noted in the discussion of procedures and results. From the results of this work, neutron radiography can be successfully carried out on the VPI & SU reactor with small objects while further development should allow studies to be made of larger objects.","abstract_has_math":false,"creators":["Tuley, Charles Richard"],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Nuclear Science and Engineering","degree_department":"Nuclear Science and Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1974,"date_issued":"1974","date_published":"1974","updated_at":"2026-07-22T22:20:27Z","subjects":[],"languages":[],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-07282010-020033"],"render_values":[{"text":"etd-07282010-020033","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/43927","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Nuclear Science and Engineering"]},{"key":"dc:creator","label":"Author","values":["Tuley, Charles Richard"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-03-14T21:41:20Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-03-14T21:41:20Z","2010-07-28"]},{"key":"dc:date.issued","label":"Date","values":["1974"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Nuclear Science and Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-07282010-020033"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/43927"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["A feasibility study to determine the feasibility of neutron radiography with the VPI & SU Research Reactor has been completed. Various experimental facilities of the reactor were tested to determine which gave the best beam parameters. The beam parameters considered were: 1) thermal neutron flux; 2) thermal to fast-flux ratio; 3) gamma vs neutron relative film exposure ratio; 4) collimator length vs diameter ratio. It was found that the north beam port best met the necessary requirements. The direct exposure method utilizing a commercially available gadolinium paint was decided upon for X-ray film exposure. The resolution capabilities of the gadolinium paint converter screen were determined for several screen thicknesses using a cadmium test object. Exposure times and object limitations were found for the combination of the X-ray film, converter screen, and neutron beam of the north beam port. The test devices used were: 1) various thicknesses of acrylic plastic; 2) plywood and white pine test pieces; 3) thorium and natural uranium slugs; 4) enriched uranium fuel plate; 5) used and unused boral control elements; 6) miscellaneous small test objects. The results were, in general, good. Exposure times and limitations were found to be in agreement with other published works. Any significant differences in the technique's capability with other facilities were noted in the discussion of procedures and results. From the results of this work, neutron radiography can be successfully carried out on the VPI & SU reactor with small objects while further development should allow studies to be made of larger objects."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["BTD"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Neutron radiography with the VPI & SU research reactor"]}]}],"canonical_facts":{"dc:contributor.department":["Nuclear Science and Engineering"],"dc:creator":["Tuley, Charles Richard"],"dc:date.accessioned":["2014-03-14T21:41:20Z"],"dc:date.available":["2014-03-14T21:41:20Z","2010-07-28"],"dc:date.issued":["1974"],"dc:description.abstract":["A feasibility study to determine the feasibility of neutron radiography with the VPI & SU Research Reactor has been completed. Various experimental facilities of the reactor were tested to determine which gave the best beam parameters. The beam parameters considered were: 1) thermal neutron flux; 2) thermal to fast-flux ratio; 3) gamma vs neutron relative film exposure ratio; 4) collimator length vs diameter ratio. It was found that the north beam port best met the necessary requirements. The direct exposure method utilizing a commercially available gadolinium paint was decided upon for X-ray film exposure. The resolution capabilities of the gadolinium paint converter screen were determined for several screen thicknesses using a cadmium test object. Exposure times and object limitations were found for the combination of the X-ray film, converter screen, and neutron beam of the north beam port. The test devices used were: 1) various thicknesses of acrylic plastic; 2) plywood and white pine test pieces; 3) thorium and natural uranium slugs; 4) enriched uranium fuel plate; 5) used and unused boral control elements; 6) miscellaneous small test objects. The results were, in general, good. Exposure times and limitations were found to be in agreement with other published works. Any significant differences in the technique's capability with other facilities were noted in the discussion of procedures and results. From the results of this work, neutron radiography can be successfully carried out on the VPI & SU reactor with small objects while further development should allow studies to be made of larger objects."],"dc:description.degree":["Master of Science"],"dc:format.medium":["BTD"],"dc:format.mimetype":["application/pdf"],"dc:identifier.other":["etd-07282010-020033"],"dc:identifier.uri":["http://hdl.handle.net/10919/43927"],"dc:publisher":["Virginia Tech"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:title":["Neutron radiography with the VPI & SU research reactor"],"dc:type":["Thesis"],"dc:type.dcmitype":["Text"],"thesis:degree_discipline":["Nuclear Science and Engineering"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:20:27Z"}