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Category 4


In a post Re: Point Beach, imbucky makes reference to "...a CAL, Category 4, and so on....".  Can someone please inform me as to what safety standard or other doctrine establishes or dictates what a Category 4 is and what its requirements are?
Thank you for any help you can provide?

Edit: spelling

Google USNRC Confrimatory Action Letter   I think its special concerns and you have to look and see what specifics are stated in the letter. Any CAL is not good.


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