Issue |
EPJ Web Conf.
Volume 278, 2023
ISRD 17 – International Symposium on Reactor Dosimetry
|
|
---|---|---|
Article Number | 02001 | |
Number of page(s) | 9 | |
Section | Calculational Methods | |
DOI | https://doi.org/10.1051/epjconf/202327802001 | |
Published online | 02 March 2023 |
https://doi.org/10.1051/epjconf/202327802001
Dosimetry data from fuel channel clips for benchmarking a new computational fluid dynamics model in neutron transport
MP Machinery and Testing (MPM), LLC, 2161 Sandy Drive, State College, PA 16803, USA
* Corresponding author: MPManahan@MPMachineryandTesting.com
Published online: 2 March 2023
Accurate neutron transport models for BWRs are needed to characterize neutron damage to the top guide, top guide cylinder, vessel nozzles, and to other upper internals. In the past, neutron transport calculations above top-of-active-fuel (TAF) have had large uncertainties (well in excess of ± 20%) mainly due to the fact that the steam density distribution in that region is not well known. An advanced three-dimensional (3D) neutron transport model, which incorporates computational fluid dynamics (CFD) in the code suite, has been developed. Retrospective dosimetry measurements were made to benchmark the transport results. Six fuel channel clips were removed from the top of the fuel bundles, and small disk-shaped dosimetry samples were cut from the clips. The cuts were made through the Inconel spring and through the stainless steel clip body. The clips were selected from bundles that cover regions of low, intermediate, and high steam density. The average C/M ratio for the 10 dosimeters is 1.06. It has been shown that all of the calculated dosimeter activities fall within ± 20% of the measurement. This meets the criterion set by RG 1.190 [1] for acceptability of the calculations.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.