Advanced Moderator Material Handbook (FY23 Version)

Technical Report · Wed Oct 25 00:00:00 EDT 2023

DOI:https://doi.org/10.2172/2204161· OSTI ID:2204161

Shivprasad, Aditya Prahlad ^[1]; Cinbiz, Mahmut N. ^[2]; Torres, James R. ^[3]; Cutler, Theresa Elizabeth ^[1]; Wootan, D.W. ^[4]; Jewell, J. Keith ^[2]; Mehta, Vedant Kiritkumar ^[1]; Widgeon Paisner, Scarlett ^[1]; Kohnert, Caitlin Anne ^[1]; Taylor, C. N. ^[2]; Luther, Erik Paul ^[1]; Trellue, Holly Renee ^[1]

---

1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
2. Idaho National Laboratory (INL), Idaho Falls, ID (United States)
3. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
4. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

High hydrogen density moderators such as metal hydrides are an important research topic within the DOE NE Microreactor Program due to their ability to retain hydrogen to much higher temperatures than other hydrogenous media. This class of moderators, which includes yttrium dihydride (YH₂), thermalizes neutrons in the system such that the overall fuel mass or the required uranium enrichment in the system can be significantly reduced. Knowledge of material properties, both in the as-fabricated and irradiated state, are important to understanding moderator performance during steady-state and transient reactor operation.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Office of Nuclear Energy (NE)
• DOE Contract Number: 89233218CNA000001
• OSTI ID: 2204161
• Report Number(s): LA-UR--23-30491
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
22 GENERAL STUDIES OF NUCLEAR REACTORS