Neutron poison burnout and effects on SNS moderator performance

Conference · Tue May 01 00:00:00 EDT 2018

DOI:https://doi.org/10.1088/1742-6596/1021/1/012071· OSTI ID:1659645

Gallmeier, Franz X. ^[1]; Lu, W. ^[2]; Iverson, Erik B. ^[1]

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1. ORNL
2. Oak Ridge National Laboratory (ORNL)

Detailed neutron absorber burnup calculations were performed for the poison plate and decoupler layers of the decoupled ambient water and liquid hydrogen moderators of SNS. Although local poison burnout was identified for the water moderator at 32 GWh and local decoupler burnout was becomes apparent at the hydrogen moderator at 37 GWh delivered proton beam energy, both moderators see major impacts to the moderator performance by increases of pulse widths and spectral changes only past the stated burnout energies.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1659645
• Country of Publication: United States
• Language: English