Document: NUREG-0800
Document ID: 988a555f-fdfa-4452-829d-c06654bfbba5
Document Type: srp
Title: Initial Plant Test Program - Design Certification and New License Applicants
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070660618.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.2
CFR Part: 
CFR Title: 

Content:
nt or licensee, requires NRC approval prior to the change. The areas designated as Tier 2* by the NRC staff are listed in the FSER, and these areas should be similar for the passive designs. The staff may determine that selected material in the SSAR, if considered for a change by an applicant or licensee that references the certified design, would require NRC approval prior to implementation of the change. This information is designated as Tier 2* information. Tier 2* is generally information that is not appropriate for treatment in Tier 1 because it is subject to change. Tier 2* is generally considered for areas associated with detailed structural and equipment design; design and analysis methodology for fuel and control rods; and supporting material for the DAC areas of the design. Some designations of Tier 2* material may expire at first full power operation, when the detailed design of the facility and its performance characteristics are known, and tested through the initial test program. The NRC bears the final responsibility for designating which material in the SSAR is Tier 2*. All cases where the staff believes that Tier 2* applies are to be reviewed and approved by the cognizant Division Director. The staff's rationale for the Tier 2* information in each area and the basis for the determination that a change would require prior NRC approval, should be documented in the FSER. The DCD should designate clearly (bracketed and italicized) the information that is determined to be Tier 2*. Use of other markers such as asterisks and bold type may also be appropriate. A table should be provided in the DCD listing the areas of the DCD that contain Tier 2* information. A statement should be included with the table stating 14.3-12 March 2007 that prior NRC approval is required to change the information, and the statement may be added to each Tier 2* area in the DCD as appropriate for clarity. IV. Tier 1 information A third section of the DCD is the Tier 1 information.