Document: NRC Regulatory Guide
Document ID: 05969442-49ea-4f4a-a9e2-de3a14628b5e
Document Type: regulatory_guide
Title: Minimization of Contamination and Radioactive Waste Generation:  Life-Cycle Planning - HISTORY 07/2013 – Periodic Review of Revision 0 – No issues identified
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML0805/ML080500187.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.21
CFR Part: 
CFR Title: 

Content:
taining reliable ground positioning system readings within certain SSCs is not practical because of structural interference with signal quality. e. Facility designs should minimize the use of embedded pipes in facility walls, floors, and the like to the extent practicable, consistent with maintaining radiation doses as low as is reasonably achievable during operations and decommissioning. Embedded pipes, especially those that are small in diameter (e.g., less than 6 inches), could complicate decommissioning activities because they can be very difficult to remove or survey. Their location should be carefully documented to facilitate eventual decommissioning. f. Temporary piping installed during construction should be removed to avoid undocumented random piping in the field that, when uncovered, will raise questions about the extent of site contamination during decommissioning. Construction debris should not be disposed of within the controlled area. g. During the design stage, consideration should be given to facilitating the removal of any equipment and/or components that may require removal and/or replacement during facility operation or decommissioning. When designing buildings or enclosures for large equipment (e.g., steam generators, large piping, tanks), an applicant should determine how the equipment will be removed for replacement/repair or how it will be permanently removed at the time of facility decommissioning. 10 CFR 20.1406 applicants should evaluate the following: • size/space clearances • installation of removable roofs/walls • placement of cranes and lifts for replacement or removal of heavy equipment or components • installation of lifting lugs • design of anchor points for lifts • use of shearable nuts and bolts • use of quick-disconnect components • ease of insulation removal • setdown areas Appendix A to RG 4.21, Page A-7 A-4. Minimizing the Generation of Waste To minimize the generation of waste, 10 CFR 20.1406 applicants