Replication Data for: The Consumable Centrepost: Coverage-versus-Protection Neutronics, Coil Integrity, and Fused Quench Detection for a Compact Spherical-Tokamak Breeder
Year: 2026
Type: dataset
Abstract: Replication data for the paper The Consumable Centrepost: Coverage-versus-Protection Neutronics, Coil Integrity, and Fused Quench Detection for a Compact Spherical-Tokamak Breeder (Kronos Fusion Energy 2026 Publication Series, paper 2.16), published at doi:10.5281/zenodo.22645704. Abstract of the paper. The inboard centrepost of a compact spherical-tokamak (ST) breeder sits closest to the 14 MeV source and is the machine's dominant lifetime risk: at useful breeding coverage the high-temperature REBCO conductor reaches its irradiation limit in a small fraction of a full-power year (fpy). We treat the centrepost as a consumable, scheduled-replacement cartridge and quantify the architecture through four coupled analyses on the frozen Hyperion design point (configuration 22021, δ=-0.30, B_0=8 T, centrepost peak field 16.84 T). Casting the inboard radial budget as a constrained optimisation, a three-dimensional OpenMC scan of the 72 cm inboard-column split (tungsten-carbide shield versus beryllium-multiplied breeding mantle) yields the coverage-versus-protection Pareto set: net tritium breeding ratio (TBR) falls monotonically from 1.196 to 1.097 as the shield grows from 5 to 40 cm, while centrepost life at the Fischer REBCO onset threshold (3.9×10^22 n m^-2) rises from 0.0048 to 0.194 fpy — the binding constraint is centrepost life, not breeding. The damage and cryogenic heat load fall with the shield at e-folding lengths of ~11 and ~9 cm respectively, and the life obeys an exact iso-elastic mission-dial law (life × source = const) that carries a 2.25× margin to the 6.57 MA mid-current point. A wedged-sector finite-element model reproduces the analytic thick-wall (Lam\'e) bore hoop stress to -4.75% (625.3 versus 656.6 MPa). What this dataset contains data/key_values.csv and data/anchors.json: the frozen design-point values quoted in the paper (symbol, value, unit, provenance), in machine-readable form. data/verification.csv: the validator gates the paper cites, each with its verdict and a link to a live recompute page. figures/: the figures from the paper, as vector PDF, with an inventory. centrepost-and-magnet-integrity.data-methods.pdf: methods, the computational codes used, and the full value table. data/data_dictionary.md: column definitions. Every value is a frozen design-point number that is independently re-run and recorded in the Kronos Physics De-Risking Register (doi:10.5281/zenodo.22645689). The paper itself is not duplicated here; read it at the DOI above.
Source: Harvard Dataverse
DOI: 10.7910/dvn/c27ros
Authors: Ford, P I, Kulcinski, G L
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7214635915