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Addendum to a Safety Case
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| 2.5.4 Addendum to a Safety Case In certain circumstances, and only with the prior agreement of the CER, certain material changes to a safety case maybe handled by these changes being identified and submitted in an addendum to the safety case. This addendum will be valid fora defined period of time, and explains the impact of the material change and how the risks are maintained ALARP in this period. The format and guidance for the addendum is the same as for the full safety case, but with the scope only covering the changes and their impact on the risk of the affected designated petroleum activities and a clear statement of the period for which the addendum is valid. Such an addendum would be appropriate if the change described in the addendum was temporary in nature such that once the defined period of time for the addendum lapsed, the safety case remains appropriate to the petroleum activities and associated petroleum infrastructure. 12 Example If a Non-production Installation (drill rig) and a Production Installation operate together for the purpose of drilling an additional platform well into an existing reservoir, the additional well may not be a material change to the platform (provided the hazards are the same as the existing wells. Notwithstanding the fact that a Well Work Safety Case has to be submitted and approved for the well being drilled, the Production Safety Case only changes slightly (by virtue of an additional well. Therefore, the temporary material change that is the combined operation (drilling over a production facility, can be described in an addendum to the Production Safety Case (with reference to the Non-production Safety Case. The following points should be considered in a Production Safety Case addendum fora combined operation with a drill rig Extra or altered plant or equipment needs to be described. New or altered hazardous substances, increased risks or SCEs introduced as part of the combined operation need to be described. A joint review of the safety aspects of the combined operation should be carried outwith all significant parties involved, in which the identification of MAHs and the assessment of risks which may arise are assessed. The safety case must show that the combined operation is suitably managed between the Non-production and Production Installations and that where the Safety Management Systems interact, or overlap, it provides clarity with regard to the procedures that are in place and the roles of individuals. In particular, the procedures and processes for communications between the two parties should be highlighted. Abridging document must be referenced and summarised in the safety case. Any additional or altered tasks, roles and responsibilities of the installation manager and staff need to be described for normal operations and emergency response. The managerial person identified with overall authority and responsibility in the event of an incident should be identified. Any changes to emergency response plans, procedures and exercises should be described. |