Open reference architecture for modular nuclear cogeneration combining aqueous thorium-uranium-plutonium reactors, working-fluid doping as a unified design principle, and integrated industrial heat coverage including cement, glass, and steel via the 1/2 loop radiolysis architecture. Targets indefinite operation on raw monazite ore feedstocks. The same architecture, with feedstock substitutions, supports off-Earth settlement — the compactness constraint of space deployment is the driving design pressure that makes consolidated multipayload working-fluid transport architecturally necessary. The package contains five documents: - readme.pdf — Package motivation, structure, and reading guide. Start here.- paper0-prior-art.pdf — Prior Art and Novelty Statement. Consolidates attributions and contribution claims for the whole package.- paper1-cogeneration.pdf — Modular Nuclear Cogeneration Blocks (Engineering Reference). Module catalog, thermal interface tiers, worked material and energy balances.- paper2-doping-thesis.pdf — Working-Fluid Doping as a Unified Architectural Principle. Conceptual framework with explicit regime boundaries.- paper3-closed-loop.pdf — Closed-Loop Fuel Cycle Synthesis (Deployment Strategy). Four-phase deployment with explicit positioning relative to India's three-stage nuclear program and China's TMSR program. The four substantive documents are intended to be read together; each cross-references the others and they share consolidated prior art in Paper 0. DOCX source files are included alongside the PDFs for readers wanting to adapt or extend the content. Released under CC BY-SA 4.0 as open reference for vendors, customers, regulators, researchers, and policymakers to converge on a shared specification. Corrections, criticisms, and extensions are invited.