Design Blueprint: A Passive Radiative Cold Box for Preserving Volatile-Bearing Samples Sized from Radiative and Conduction Bounds

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24152071): This paper presents the sizing of a surface system for the Moon, designed around a single operating principle and computed from published material properties of its working environment. The headline results are: radiated cooling power of 51.092 W; parasitic heat leak of 1.9 W; cooling margin of 49.192 W. The total mass is 17.4 kg including a twenty percent margin over the component subtotal. Every figure was produced by the accompanying computation script from stated assumptions about density, strength, thermal properties and composition; no figure is asserted without its derivation. Weak poin Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.