MMOD Shield Spare Inventory
Standardized MMOD Panel Spare Parts Inventory
The standardized MMOD panel spare parts inventory is a 500-kilogram reserve of modular shielding components—including Whipple panels, stuffed-layer assemblies, and hatches with aluminum mounting hardware—used to replace surface units compromised by debris strikes. Stocking six standardized panel types at twenty units each, the inventory requires zero operational power, provides a 50-year shelf life, and features a 1,000,000-hour mean time between failures. Sustaining passive structural defenses over a 100-year mission requires robotic-accessible storage configurations, continuous shelf-life tracking, and integration with in-situ manufacturing systems to replace consumed stock without relying on terrestrial resupply.
Inventory of standardised MMOD panel spare parts (Whipple panels, stuffed-layer assemblies, hatches) ready for L1-MNT replacement of damaged units.
Purpose
Inventory of standardised MMOD panel spare parts (Whipple panels, stuffed-layer assemblies, hatches) ready for L1-MNT replacement of damaged units.
Context
Child of L2-MMD-SPARE within the Lunar Ark system
Principles
- ▸Standardised panel sizes for robotic L1-MNT swap
- ▸Inventory tracked in L1-DVT
- ▸Replenishment via L1-MFG in-situ manufacture
- ▸Critical-path spares prioritised
- ▸Aging tracked (polymer components have shelf life)
Typical implementations
- ▸ISS Orbital Replacement Unit (ORU) heritage
- ▸Aerospace spare parts logistics
- ▸NASA Lunar Logistics studies
Lunar considerations
- ▸100-year mission requires renewable spares — ISRU dependent
- ▸Long-mission shelf-life tracking
- ▸Robotic-accessible storage
Specifications
Functional
| primary function | Inventory of standardised MMOD panel spare parts (Whipple panels, stuffed-layer assemblies, hatches) ready for L1-MNT replacement of damaged units. |
| panel types | 6 |
| stock quantity each | 20 |
Physical
| mass kg | 500 |
| materials | Standardised panel stock, Aluminum mounting hardware |
| vacuum compatibility | True |
Operational
| power consumption w | 0 |
| thermal range c | -40, 70 |
| lifetime years | 50 |
| mtbf hours | 1000000 |
Interfaces
Provides
- MMOD panel spares for replacement
Requires
- In-situ panel manufacture
- Inventory database
Cite this entry
Lunar Ark Codex. "MMOD Shield Spare Inventory" (L3-MMD-SPARE-INV). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-MMD-SPARE-INV
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.