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Fusion Science and Technology
Latest News
First astatine-labeled compound shipped in the U.S.
The Department of Energy’s National Isotope Development Center (NIDC) on March 31 announced the successful long-distance shipment in the United States of a biologically active compound labeled with the medical radioisotope astatine-211 (At-211). Because previous shipments have included only the “bare” isotope, the NIDC has described the development as “unleashing medical innovation.”
Jennifer Lyons, Edward Love, Kim Burns
Fusion Science and Technology | Volume 71 | Number 4 | May 2017 | Pages 616-621
Technical Note | doi.org/10.1080/15361055.2017.1290944
Articles are hosted by Taylor and Francis Online.
TEACUP (Tritium Effluent Analysis and Core-follow, Up-to-date and Predictive) is a tritium management and supplemental core follow program that allows its users to account for reactor coolant system (RCS) tritium sources, generate discharge release estimates, account for downstream river flows and concentrations, and calculate corresponding uncertainties. The program incorporates water balance methodologies, tritium production estimates from secondary startup neutron sources, soluble boron content, reactor coolant system tritium measurements, and seasonal river flow estimates. TEACUP was designed specifically to facilitate the tracking of Tritium Producing Burnable Absorber Rod (TPBAR) permeation since measuring in-reactor permeation directly is not feasible and prediction methodologies have thus far been insufficient. A number of models, calculations, and correlations were developed in order to quantify all of the leading sources and losses of tritium in the RCS. By comparing all of the known contributors and discharges from the RCS tritium inventory to the measured RCS tritium concentration, the unaccounted for balance (within some band of uncertainty) can be attributed to TPBAR permeation. The tritium release estimates to the river generated from TEACUP are validated by comparing them to the measured tritium releases which match well and give confidence that TEACUP is tracking and accounting for tritium appropriately. An additional check on the methodologies within TEACUP is that the cycle-to-cycle trends for tritium permeation per TPBAR are consistent in behavior and the estimated release per TPBAR across each cycle is the same within their uncertainty.