ISO 23312:2022

Overview

ISO 23312:2022 - "Space systems - Detailed space debris mitigation requirements for spacecraft" - provides detailed, implementable requirements and recommendations for minimizing space debris from unmanned spacecraft in Earth orbit. It supports the high‑level principles of ISO 24113 by defining design, operational and documentation measures addressing intentional releases, accidental break‑ups, end‑of‑mission disposal and estimation of remaining usable propellant. NOTE: the standard does not cover nuclear power sources on spacecraft.

Key topics and technical requirements

• Avoiding release of debris during normal operations
  • Design appendages and deployment mechanisms to prevent unintended release (fasteners, caps, MLI, paint).
  • Select materials/processes to avoid flaking and fragmentation.
  • Special measures for tether systems (e.g., multi‑strand, retraction at disposal).
• Avoiding accidental break‑up
  • Quantitative probability assessment for break‑up risk in orbit (aligned with ISO 24113 probability levels).
  • Design and operational measures to deplete or permanently deactivate on‑board stored energy sources (propellant residuals, batteries, pressure vessels, momentum wheels).
  • Subsystem monitoring requirements (pressures, temperatures, battery state, attitude/orbit control health).
  • Requirement to update and implement passivation procedures prior to end of life.
• End‑of‑mission disposal
  • Disposal planning and execution measures for GEO and LEO to minimize long‑term interference (stable disposal orbits, long‑term 100‑year characteristics, re‑entry options for LEO).
  • Ensuring execution and verification of disposal manoeuvres.
• Estimating remaining usable propellant
  • Methods such as book‑keeping and PVT (pressure‑volume‑temperature) to estimate usable propellant mass, with treatment of uncertainty and documentation.
• Space debris mitigation planning
  • Requirement for a Space Debris Mitigation Plan (SDMP) including break‑up prevention, End of Mission Disposal Plan (EOMDP) and contingency procedures.
• Informative annexes
  • Examples and procedures for break‑up probability estimation, estimation methods, and deployable drag enhancement devices.

Practical applications

• Integrating debris mitigation into spacecraft design reviews and verification activities.
• Defining flight‑operations monitoring and passivation sequences.
• Creating EOMDPs and contingency response plans for mission operators and integrators.
• Supporting regulatory compliance and procurement requirements for satellite programs.

Who should use this standard

• Spacecraft systems engineers and designers
• Mission planners and satellite operators
• Acquiring organizations and contract managers
• Space regulatory bodies and orbital debris assessors
• Test and verification teams responsible for passivation and disposal validation

Related standards

• ISO 24113 (top‑level space debris mitigation requirements)
• ISO 16127, ISO 16164, ISO 23339, ISO 26872 (legacy documents consolidated into ISO 23312)
• ISO/TR 20891 (battery health assessment)
• ISO 16691, ISO 23129, ISO 23230 (materials and coatings guidance)

Keywords: ISO 23312:2022, space debris mitigation, spacecraft disposal, passivation, end‑of‑mission disposal plan, propellant estimation, ISO 24113.