Section 51.72 - Supplement to draft environmental impact statement(a) The NRC staff will prepare a supplement to a draft environmental impact statement for which a notice of availability has been published in the FEDERAL REGISTER as provided in § 51.117 , if: (1) There are substantial changes in the proposed action that are relevant to environmental concerns; or(2) There are significant new circumstances or information relevant to environmental concerns and bearing on the proposed action or its impacts.(b) The NRC staff may prepare a supplement to a draft environmental impact statement when, in its opinion, preparation of a supplement will further the purposes of NEPA.(c) The supplement to a draft environmental impact statement will be prepared and noticed in the same manner as the draft environmental impact statement except that a scoping process need not be used.