Document: NUREG-0800
Document ID: 73747cf4-ff95-449b-b6b0-53dc0755b9e0
Document Type: srp
Title: OTHER SEISMIC CATEGORY I STRUCTURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1235/ML12353A382.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.4
CFR Part: 
CFR Title: 

Content:
ember 2012 rods. In addressing the inconsistency of spent fuel structural integrity reviews, the addendum to Appendix D should afford a greater degree of guidance to reviewers that will facilitate the deliberate and accurate assessment of spent fuel structural integrity. Spent fuel pool racks are Seismic Category I, and Appendix D states “The main safety function of the spent fuel pool, including the liner, and the racks is to maintain the spent fuel assemblies in a safe configuration….” It has come to the attention of staff reviewers that at least some licensees and applicants consider spent fuel pool racks to be non- safety related, do not invoke the Appendix B quality assurance requirements for spent fuel pool racks, and exclude spent fuel pool racks from Maintenance Rule Condition Monitoring programs. The proposed addition to the first paragraph of Appendix D should clarify the staff’s position. Appendix D, as currently written, provides the staff’s guidance for spent fuel pool re- racking at operating plants, in order to provide significantly increased spent fuel storage. This was necessitated by the lack of available off-site storage facilities for spent nuclear fuel. Consequently, the wording of Appendix D is in need of updating to be more generically applicable, now that new reactors are being designed and constructed. 4. Revised Item 6 “Structural Acceptance Criteria” to enhance the guidance for acceptance criteria in accordance with ASME Code, Section III, Division 1, Subsection NF. See item 3 above for the technical rationale for this change. 5. Revised Table 1 to enhance the guidance on acceptance limits and the guidance on load combinations when performing a limit analysis. The technical rationale for this change is as follows. A change was made in Table 1 of Appendix D, for the acceptance limit under the heading “Limit Analysis.” Since ASME Code Section III, Appendix XVII was deleted, the acceptance limit was replaced with ASME Code