Document: NUREG-0800
Document ID: 73dc4705-6dff-4f44-87ee-2a6f76cc6536
Document Type: srp
Title: OTHER SEISMIC CATEGORY I STRUCTURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1319/ML13198A258.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.4
CFR Part: 
CFR Title: 

Content:
arrived at this conclusion due to the fact that it is apparent that licensees and applicants are able to adequately estimate the loading imparted on a spent fuel bundle. However, the challenge lies in determining whether the cladding can withstand these imparted loads. This challenge is exacerbated 3.8.4-42 Revision 4 – September 2013 by the fact that there is no design code applicable to the structural design of spent fuel 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 nonsafety- 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 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