GB/Z 41270.5-2026Process management for avionics - Atmospheric radiation effects - Part 5: Assessment of thermal neutron fluxes and single event effects in avionics systems (English PDF)
航空电子过程管理 大气辐射影响 第5部分：航空电子系统中热中子注量率及其单粒子效应影响评估
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 24, 2026
Implementation date
September 24, 2026
Scope
GB/Z 41270.5-2026 is the English-translated version of 航空电子过程管理 大气辐射影响 第5部分：航空电子系统中热中子注量率及其单粒子效应影响评估.
This guiding technical document concerns the assessment of thermal neutron fluxes and the single event effects they can cause in avionics systems. It is Part 5 of the series on atmospheric radiation effects under process management for avionics. It is meant for avionics system designers, equipment manufacturers, reliability and safety engineers, and certification specialists who evaluate how neutrons in the atmosphere may affect electronic hardware on aircraft.
It adopts an international standard and was issued on 24 September 2026. As a GB/Z, it gives guidance rather than requirements that must be satisfied. Thermal neutrons are low-energy particles that can interact with certain materials used in electronic components, so they need to be assessed separately from the high-energy particles that are often considered first. The document can be read together with the other parts of the series, which deal with different particle types and design topics, and it gives programs a Chinese reference for the assessment of this particular hazard.
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Document preview — GB/Z 41270.5-2026
National Standard of the People's Republic of China
- ICS
- 49.025.01
- Classification
- V25
Issued by: State Administration for Market Regulation; Standardization Administration of China
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
Foreword
GB/Z 41270.5-2026 is a national guiding technical document (GB/Z) of the People's Republic of China, issued on 24 September 2026 by the State Administration for Market Regulation and the Standardization Administration of China.
The document adopts an international standard (ISO or IEC).
It is under the responsibility of the Standardization Administration of China.
Classification: ICS 49.025.01; CCS V25.
1 Scope
This guiding technical document concerns the assessment of thermal neutron fluxes and the single event effects they can cause in avionics systems. It is Part 5 of the series on atmospheric radiation effects under process management for avionics. It is meant for avionics system designers, equipment manufacturers, reliability and safety engineers, and certification specialists who evaluate how neutrons in the atmosphere may affect electronic hardware on aircraft.
It adopts an international standard and was issued on 24 September 2026. As a GB/Z, it gives guidance rather than requirements that must be satisfied. Thermal neutrons are low-energy particles that can interact with certain materials used in electronic components, so they need to be assessed separately from the high-energy particles that are often considered first. The document can be read together with the other parts of the series, which deal with different particle types and design topics, and it gives programs a Chinese reference for the assessment of this particular hazard.
Remaining clauses in the full document
- 2 Normative references
- 3 Terms and definitions
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 21 pages — is available in the English PDF.
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Related Standards
GB/Z 41270.6-2026 — Process management for avionics - Atmospheric radiation effects - Part 6: Potential impacts of extreme space weather on the avionics environment and electronic equipment
GB/Z 41270.4-2026 — Process management for avionics - Atmospheric radiation effects - Part 4: Design of high voltage aircraft electronics managing potential single event effects
GB/Z 41270.8-2026 — Process management for avionics - Atmospheric radiation effects - Part 8: Proton, electron, pion, muon, alpha-ray fluxes and single event effects in avionics electronic equipment awareness guidelines
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