Speaker
Mrs
Irina Popova
(ORNL)
Description
Each spent Spallation Neutron Source (SNS) structure that leaves the SNS site requires supporting documentation with radionuclide inventory and dose rate prediction for the time of the transportation. Analyses are performed, assuming realistic irradiation history and decay case to ensure that the container/package, housing the structure, is compliant with the waste management regulations.
For validating neutronics analyses, measurements of dose rates from the spent target vessel # 13 and proton beam window # 5 were performed. Neutronics analyses were performed to calculate residual dose rates from both structures for the time of measurements.
Overall the calculated dose rates for the spent target vessel are in a good agreement with the measured dose rates – within 25% besides a few locations, where the dose rates are overestimated by 50%. Proton beam window dose rates are in evaluation process.
Primary author
Mrs
Irina Popova
(ORNL)
Co-authors
Dr
Franz Gallmeier
(ORNL)
Mr
Michael Dayton
(ORNL)
Dr
Steven Trotter
(ORNL)
