Ensure that all known hazards and their associated

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Ensure that all known hazards and their associated risks are defined, documented, and tracked as a program policy so that the decision-makers are made aware of the risks being assumed when the system becomes operational. Require that an assessment of safety risk be presented as a part of program reviews and at decision milestones. Make decisions on risk acceptability for the program and accept responsibility for that decision. Check Your Progress Fill in the blanks: 1. …………... Management is the overall process of identifying, evaluation, controlling or reducing and accepting risks. 2. The term …………... is used to identify the responsible entity for managing the system safety effort. (c) UPES, Not for Reproduction/ Sale
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UNIT 16: Principle of System Safety Notes ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ Safety Order of Precedence One of the fundamental principles of system safety is the Safety Order of Precedence in eliminating, controlling or mitigating a hazard. The Safety Order of Precedence is shown in Table 16.5. Table 16.5: Safety Order of Precedence Description Priority Definition Design for minimum risk 1 Incorporate safety devices 2 Provide warning devices 3 Develop procedures and training 4 Examples: Design for Minimum Risk Incorporate Safety Devices Provide warning devices Develop procedures and training Design to eliminate risks. If the identified risk cannot be eliminated, reduce it to an acceptable level through design selection. When neither design nor safety devices can effectively eliminate identified risks or adequately reduce risk, devices shall be used to detect the condition and to produce an adequate warning signal. Warning signals and their application shall be designed to minimize the likelihood of inappropriate human reaction and response. Warning signs and placards shall be provided to alert operational and support personnel of such risks as exposure to high voltage and heavy objects. If identified risks cannot be eliminated through design selection, reduce the risk via the use of fixed, automatic, or other safety design features or devices. Provisions shall be made for periodic functional checks of safety devices. Where it is impractical to eliminate risks through design selection or specific safety and warning devices, procedures and training are used. However, concurrence of authority is usually required when procedures and training are applied to reduce risks of catastrophic, hazardous, major, or critical severity. Design hardware systems as per specifications, e.g. use low voltage rather than high voltage where access is provided for maintenance activities. If safety devices are not practical, provide warning placards. Train maintainers to shut off power before opening high voltage panel. If low voltage is unsuitable, provide interlocks.
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