MIL-STD-1901A
4.5 Safety System Failure Rate. The safety failure rate of the IS shall be calculated by performing a safety analysis (see 4.2) and shall be verified to the extent practicable by test and analysis. As a minimum requirement, the safety failure rate shall not exceed one failure in one million prior to intentional initiation of the arming sequence.
4.6 Documentation. The evaluation program used as the basis of the safety assessment prepared by the developing agency shall be documented in both detail and summary form.
4.7 Electromagnetic Environments. ISs and ISDs, in their normal life cycle configurations, shall not inadvertently arm or function during and after exposure to: electromagnetic radiation (EMR), electrostatic discharge (ESD), electromagnetic pulse (EMP), electromagnetic interference (EMI), lightning effects (LE) or power supply transients (PST). In addition, ISs and ISDs shall not exhibit unsafe operation during and after exposure to the above environments. ISs and ISDs installed in the host munition shall be tested or evaluated for:
a. EMR - per MIL-STD-464 b. ESD - per MIL-STD-464 c. EMP - per MIL-STD-464 d. EMI - per MIL-STD-464 e. LE - per MIL-STD-464
f. PST - by appropriate test and analysis based on the design of the power system for the IS.
4.8 Electronic Logic Functions. Any electronic logic related to safety functions performed by the IS or ISD shall be embedded as firmware or hardware. Firmware devices shall not be erasable or alterable by credible environments which the IS or ISD would otherwise survive.
4.9 Fail-Safe Features. Fail safe designs shall be considered for ignition systems and ignition safety devices. ISD designs shall incorporate fail-safe feature(s) based on munition requirements.
4.10 Explosive Ordnance Disposal. The IS and ISD shall incorporate Explosive Ordnance Disposal (EOD) features which insure that, in the event of accidents, extreme/hostile situations, or dud ordnance, EOD personnel can either return the
munition to a safe to handle condition or, where necessary, implement field expedient disposal. Where practical, incorporate features that permit determination of the armed or unarmed state of the IS or ISD by EOD in the event of a misfire, hung store, etc.
4.10.1 EOD reviewing authority. All new or altered designs, or new applications of existing designs shall be presented to the appropriate service's EOD
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