Evaluation of results and corrective actions

The operating organization should ensure that the results of MS I are evaluated in order to verify compliance with the acceptance criteria. 

Acceptance criteria for MS I can be based on the as-manufactured specific standards. They should be established before the start of the programme and should be submitted to the regulatory body for review when required. When new or revised standards are developed or introduced, they should be agreed with the regulatory body. 

Once an activity for MS I has been completed, the results should be reviewed by a competent person other than the person who performed the activity. The review should establish whether the activity was appropriate and was properly completed, and should provide assurance that all resirlts satisfy the acceptance criteria. If the resirlts are 

When the results of MS I for a plant item that is out of service fall outside the acceptance criteria, then that plant item, unless it is repaired, replaced or modified, should remain non-operational until the safety aspects have been reviewed. If a review of the safety aspects for such a safety related plant itan shows that its reliability and effectiveness have been affected, and if it is confirmed that a decision was taken not to repair, replace or modify it, then the deviation from the acceptance criteria should be justified in accordance with established procedures as a change to the safety analysis report. Any such plant item should remain non-operational until a justification of the deviation has been completed and approval of the regulatory body, if required, has been obtained. If the results of MS I or of the review show that other SSCs of the plant may have similar defects, these SSCs should be inspected as soon as possible. 

The MS I programme should include appropriate actions to be taken in response to postulated deviations from the acceptance criteria, on the basis, primarily, of design information and design analysis. As a general rule, the actions to be taken when a deviation is detected should include, as appropriate  

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