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DEFENCE IN DEPTH
Defence in depth: sources

HOW TO CATEGORIZE MACHINE SOURCES

 

Events involving accelerators should be rated using the facilities guidance covered in the defence in depth: facilities module and chapter 6 of the Manual.

Guidance for other machine sources is provided here.

Use Category 4 row if no event can result in any deterministic effects even when all the safety provisions fail.

Use Category 2/3 row when deterministic effects could occur if all the safety provisions fail.

Source category

Rating for maximum
potential consequences

Maximum rating under
defence-in-depth

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2

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