Document: NRC Regulatory Guide
Document ID: a9ef2370-dd48-458d-8383-4aa42db35627
Document Type: regulatory_guide
Title: Spent Fuel Storage Facility Design Basis + HISTORY - HISTORY 03/2026 – Periodic Review of Revision 2 – Reviewed with issues identified for future consideration 10/2015 – Periodic Review of Revision 2 – No Issues Identified 10/2006 – DG-1162 , Second Proposed Revision 2 12/1981 – Draft CE 913-5 , First Proposed Revision 2 Revision 1 was issued for public comment on 12/1975 (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2605/ML26050A188.pdf
Revision Date: 2026-03
Chapter: 
Section ID: RG-1.13
CFR Part: 
CFR Title: 

Content:
Regulatory Guide Periodic Review Regulatory Guide Number: 1.13, Revision 2 Title: Spent Fuel Storage Facility Design Basis Office/Division/Branch: NRR/DSS/SCPB Technical Lead: David Coy Staff Action Decided: Reviewed with issues identified for future consideration 1. What are the known technical or regulatory issues with the current version of the Regulatory Guide (RG)? No significant issues were identified, and the following minor issues were identified for future consideration: • On page 5 of RG 1.13, Exceptions, first bullet, last sentence, add clarification for all heat conditions to include boiling. This is because passive pools are allowed to boil. o Consider modifying sentence to state, “for all heat load conditions, including full-core offloads during refueling except under accident conditions where passive pools are allowed to boil.” For future considerations.  NOTE: Except for passive spent fuel pools that are allowed to exceed the limit of 60 °C only during accident conditions. • On page 8 of RG 1.13, section 6, bullet b, consider making these two different bullets (bullet b and new addition of bullet c) to clarify and differentiate between active makeup and passive cooling. o For bullet b (active makeup cooling) Consider adding, “If the spent fuel pool is designed to allow coolant boiling during accident conditions and credits active makeup water, no drains, piping, or other systems should be installed that would allow coolant levels to drain below adequate shielding depths of approximately 3 meters (10 feet) above the top of the fuel assemblies.”  NOTE: When you are crediting cooling and makeup you must maintain adequate shielding (3 meters or 10 feet). When the system credits passive cooling, you must maintain adequate water volume for 72 hrs for spent fuel cooling. o Add bullet c (passive cooling) on page 8 of RG 1.13, section 6, to clarify and address passive cooling (no active makeup for 72 hrs) minimum drain down protection