Pressure Vessel Inspection Provisions
In-Service Inspection Access and NDE System
Pressure vessel inspection provisions are integrated structural access ports, flush-mounted ultrasonic transducers, strain gauge rosettes, and acoustic emission sensors designed to monitor lunar habitat pressure vessel integrity. These non-destructive evaluation systems enable robotic tools to examine critical weld joints, monitor stress concentrations, and detect crack growth or wall thinning during operation. Lunar operational requirements dictate that this infrastructure support thousands of robotic inspection cycles across a 100-year program without depressurizing the vessel. Consequently, all built-in access ports and sensor mounting pads must allow continuous and periodic structural assessment without weakening the primary pressure boundary.
Built-in provisions for periodic inspection of pressure vessel integrity
Purpose
Built-in provisions for periodic inspection of pressure vessel integrity
Context
Child of L2-STR-PRES
Principles
- ▸Inspection ports at critical weld joints enable robotic NDE access
- ▸Strain gauge rosettes at stress concentration points provide continuous monitoring
- ▸Acoustic emission sensors detect crack growth between scheduled inspections
- ▸Ultrasonic thickness measurement detects wall thinning from any corrosion
Typical implementations
- ▸Nuclear pressure vessel in-service inspection programs (ASME Section XI)
- ▸ISS structural health monitoring provisions
- ▸Pipeline inspection pig technology adapted for internal vessel inspection
Lunar considerations
- ▸Robotic inspection must be possible without depressurizing the vessel
- ▸100-year inspection program means thousands of inspection cycles
- ▸Access provisions must not weaken pressure boundary
Specifications
Functional
| primary function | Built-in provisions for periodic inspection of pressure vessel integrity |
Physical
| materials | Flush-mounted UT transducers, Strain gauge rosettes, AE sensor mounting pads |
Interfaces
Provides
- NDE and monitoring data for structural health assessment
Requires
- Robotic access for inspection tasks
Cite this entry
Lunar Ark Codex. "Pressure Vessel Inspection Provisions" (L3-STR-PRES-INSP). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-STR-PRES-INSP
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.