Document: 10 CFR Part 50
Document ID: ee5fead7-5118-4299-bc5f-8c6add25258c
Document Type: cfr
Title: Backfitting.
Source: 10 CFR Part 50
Source URL: https://www.ecfr.gov/current/title-10/part-50/section-50.109
Revision Date: 
Chapter: 
Section ID: 50.109
CFR Part: 50
CFR Title: 10

Content:
§ 50.109 Backfitting. ( a ) ( 1 ) Backfitting is defined as the modification of or addition to systems, structures, components, or design of a facility; or the design approval or manufacturing license for a facility; or the procedures or organization required to design, construct or operate a facility; any of which may result from a new or amended provision in the Commission's regulations or the imposition of a regulatory staff position interpreting the Commission's regulations that is either new or different from a previously applicable staff position after: ( i ) The date of issuance of the construction permit for the facility for facilities having construction permits issued after October 21, 1985; ( ii ) Six (6) months before the date of docketing of the operating license application for the facility for facilities having construction permits issued before October 21, 1985; ( iii ) The date of issuance of the operating license for the facility for facilities having operating licenses; ( iv ) The date of issuance of the design approval under subpart E of part 52 of this chapter ; ( v ) The date of issuance of a manufacturing license under subpart F of part 52 of this chapter ; ( vi ) The date of issuance of the first construction permit issued for a duplicate design under appendix N of this part ; or ( vii ) The date of issuance of a combined license under subpart C of part 52 of this chapter , provided that if the combined license references an early site permit, the provisions in § 52.39 of this chapter apply with respect to the site characteristics, design parameters, and terms and conditions specified in the early site permit. If the combined license references a standard design certification rule under subpart B of 10 CFR part 52 , the provisions in § 52.63 of this chapter apply with respect to the design matters resolved in the standard design certification rule, provided however, that if any specific backfitting limitations are included in a referenced