scope:

This publication includes all of the written replies issued between the indicated dates by the Secretary, speaking for the ASME CONAGT Committee, Committee on Nuclear Air and Gas Treatment, to inquiries concerning interpretations of technical aspects of ASME N509, Nuclear Power Plant Air Cleaning Units and Components.

These replies are taken verbatim from the original letters except for a few typographical corrections and some minor editorial corrections made for the purpose of improved clarity. In a few instances, a review of the interpretations revealed a need for corrections of a technical nature: in these cases a corrected interpretation immediately follows the original reply.

These interpretations were prepared in accordance with the accredited ASME procedures. ASME procedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect the interpretation. Further, persons aggrieved by this interpretation may appeal to the cognizant ASME committee or subcommittee. ASME does not "approve," "certify," "rate," or "endorse" any item, construction, proprietary device, or activity.