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Dataset: Accident Tolerant Reactor Shutdown for NTP Systems, Phase II
Provided by National Aeronautics and Space Administration
Updated 12 Nov 2020

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Dataset summary

The dataset on this page is a cache of the dataset It is a snapshot of the dataset as it appeared on 06 Jun 2021 23:23 GMT. The current dataset could have changed in the meantime. Attribution: Contains data retrieved from

In brief, USNC's accident submersion safe drums are control drums where a small amount of fuel is added opposite to the neutron absorber and the drums impinge on the active core to substantially increase the shutdown criticality margin of the control drums. Phase 1 results indicate that the shutdown criticality margin is more than sufficient to maintain sub-criticality in the worst-case water submersion accidents. Key accidents that the accident submersion safe drums address include submersion in freshwater and sand with a stuck drum in the full-on position and submersion in water and wet sand with reflector loss. This SBIR will develop the submersion safe reactor shutdown system for Nuclear Thermal Propulsion (NTP) identified in the Phase 1. Remaining subcritical during a during water submersion accident is a design requirement for NTP systems. As of now, all thermal spectrum NTP concepts (including LEU NTP systems) fail to remain subcritical during water submersion and thus are not w...

Dataset:Accident Tolerant Reactor Shutdown for NTP Systems, Phase II
Provider:National Aeronautics and Space Administration
Licence:License information is derived automatically. Refer to source for license information before using this data.
License not specified
Country:United States of America

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