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Overview on Analyses of Dose Rates During RID Parts Removal/Exchange

by Irina I Popova, Franz X Gallmeier
Publication Type
Conference Paper
Book Title
Transactions of the American Nuclear Society
Publication Date
Page Numbers
868 to 872
ISSN: 0003
Publisher Location
Illinois, United States of America
Conference Name
2023 ANS Annual Meeting
Conference Location
Indianapolis, Indiana, United States of America
Conference Sponsor
Conference Date

One of the most irradiated Spallation Neutron Source (SNS) accelerator components is ring injection dump (RID), which is located downstream of the accumulator ring injection section. The unstripped and only partially stripped H- beam is discarded in the injection into the accumulator ring and is redirected to the RID, which is about 5% of the full beam current. According to the accelerator operation plan, the beam stop and the window assemblies of the existing RID will be removed and replaced, when they have reached their end-of-life. This procedure, which includes multiple steps, is scheduled to take place during facility maintenance period in January 2023.
In order to support job planning and meet ALARA requirements during removal and exchange of the components, dose rates for each stage of exchange operation are calculated.