Multi-Pack Disposal Concepts for Spent Fuel (Revision 1)

Hardin, Ernest¹  Matteo, Edward N.¹  Hadgu, Teklu¹ 

[1] Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

关键词: SPENT FUELS;    HIGH-LEVEL RADIOACTIVE WASTES;    RADIOACTIVE WASTE DISPOSAL;    UNDERGROUND DISPOSAL;    PWR TYPE REACTORS;    BWR TYPE REACTORS;    FINLAND;    SWEDEN;    CLAYS;    CONTAINERS;    FRANCE;   

DOI  :  10.2172/1235646
RP-ID  :  SAND--2016-0338R
PID  :  OSTI ID: 1235646
Others  :  Other: 618505
Others  :  TRN: US1600257

学科分类：核能源与工程

美国|英语

来源: SciTech Connect

【 摘 要 】

At the initiation of the Used Fuel Disposition (UFD) R&D campaign, international geologic disposal programs and past work in the U.S. were surveyed to identify viable disposal concepts for crystalline, clay/shale, and salt host media. Concepts for disposal of commercial spent nuclear fuel (SNF) and high-level waste (HLW) from reprocessing are relatively advanced in countries such as Finland, France, and Sweden. The UFD work quickly showed that these international concepts are all ???enclosed,??? whereby waste packages are emplaced in direct or close contact with natural or engineered materials . Alternative ???open??? modes (emplacement tunnels are kept open after emplacement for extended ventilation) have been limited to the Yucca Mountain License Application Design. Thermal analysis showed that if ???enclosed??? concepts are constrained by peak package/buffer temperature, that waste package capacity is limited to 4 PWR assemblies (or 9 BWR) in all media except salt. This information motivated separate studies: 1) extend the peak temperature tolerance of backfill materials, which is ongoing; and 2) develop small canisters (up to 4-PWR size) that can be grouped in larger multi-pack units for convenience of storage, transportation, and possibly disposal (should the disposal concept permit larger packages). A recent result from the second line of investigation is the Task Order 18 report: Generic Design for Small Standardized Transportation, Aging and Disposal Canister Systems. This report identifies disposal concepts for the small canisters (4-PWR size) drawing heavily on previous work, and for the multi-pack (16-PWR or 36-BWR).