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1.5.2  Unit safety assurance documentation will be supported by individual safety documentation that describes projects or changes which occur during the lifetime of the unit. Such documentation should be notified to SRG, who will advise if specific approval under the ANO is required, or if the safety documentation may be considered for later audit activity, if considered necessary (946). This is likely to be the situation when SRG has agreed the adoption of a formal SMS at the unit. The approval or acceptance of such documentation may require the amendment of the unit safety assurance documentation.
1.5.2.1  Current Operations
a) The current operations of the unit should be described in the Unit safety assurance documentation (947). The purpose of this documentation is to provide assurance that the operations are safe and will continue to be safe.
b) The documentation is used for managing operational safety. It may be accepted by the regulator as a prime regulatory document within the context of a formal safety management system.
c) In order to provide the necessary assurance, the documentation should present evidence and arguments that demonstrate the safety adequacy of existing operations for their role (948). The following areas should be addressed:
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Safety management system (949)

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Description of operation (950)

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Safety assessment of operation (951)

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Compliance with regulations (952)

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Safety performance (953)

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Operational procedures (954)

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Safety accountabilities (955)

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Safety communications (956)

 

1.5.2.2  Safety related changes to current operations
a) Changes to the  current operations, which may have an impact on the safe operation of the unit’s ATS provision, should be notified to SRG (957). The following illustrates but is not limited to, the anticipated activities requiring such notification:
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the installation and commissioning of a system

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a modification to a piece of equipment which is in service

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a change to maintenance arrangements

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the withdrawal of a service or facility

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the introduction of a new, or a change to an existing, ATS procedure

b) The safety assurance documentation supporting the proposed activity should consider all aspects of the proposal, from inception through to routine operational use (958). Typically the following areas should be considered:
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The identification of operational and functional requirements;

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The management of the implementation of the activity;

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The completion of a risk assessment and identification of the safety requirements to be satisfied;

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The presentation of evidence that the system design will achieve the safety, operational and functional requirements identified;

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The presentation of measures to control any risks which cannot be satisfactorily mitigated by the system design;

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The presentation of measures taken to achieve an equivalent level of safety where identified requirements cannot be satisfied by the system design;

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Evidence that no unpredicted impact will occur to other components of the system as a result of the change;

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Evidence that operating and maintenance procedures are acceptable for routine operation.

 

1.6  Submission of Safety related change assurance documentation
1.6.1  The safety assurance documentation produced that addresses, but is not limited to, the foregoing should be submitted to SRG if requested, following notification of the intent to introduce the change (959). Typically the submitted documentation may take the form of several sequential parts. The following provides guidance and expansion of each typical area.
　
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