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发表于 2024-10-20 15:18:20
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Your question(s)(2024.08.30):
"EU GMP Annex1 4.12 ...The final stage of the airlock should, in the “at rest” state, be of the same cleanliness grade (viable and total particle) as the cleanroom into which it leads."
Why should in the “at rest” state? In actual activities, for example, when personnel enter from the D-grade room into the C-grade room through the airlock, the airlock is "in operation" state. Even if items(goods) are placed alone in the airlock, the receiving room, which is the C-grade room, is also "in operation" state(because it relies on personnel to receive the items), so there is no need to maintain the “at rest” state for suspended particles in the airlock. I can prove that the viable and total particle in the airlock meets the "in operation" state, and there is no need to demonstrate compliance with the "in rest" standard.
Response to ASK(2024.10.17)
EU GMP Annex 1, points 4.29 and 9.15, provide more clarification on what is meant by the "at rest" state: the "at rest" state should be achieved after a short “clean up” period defined during qualification (guidance value of less than 20 minutes) in an unmanned state, after the completion of operations.
Point 4.29 reguires that cleanroom classification should be carried out in the "at rest" and "in operation" states, so it is expected to demonstrate compliance with the "at rest" limits. The definition of "at rest" and "in operation" is also included in the same paragraph.
As mentioned in point 4.25, more reference for the qualification of the cleanrooms can also be found in the ISO 14644 series of standards. |
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