Document: NRC Regulatory Guide
Document ID: d9cc810b-2b66-41ff-aa66-9378ca993586
Document Type: regulatory_guide
Title: Sizing of Large Lead-Acid Storage Batteries (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2311/ML23118A344.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.212
CFR Part: 
CFR Title: 

Content:
thod acceptable to the NRC staff for meeting that regulatory requirement as described in the specific RG. If the secondary reference has neither been incorporated by reference into NRC regulations nor endorsed in a RG, then the secondary reference is neither a legally-binding requirement nor a “generic” NRC-approved acceptable approach for meeting an NRC requirement. However, licensees and applicants may consider and use the information in RG 1.212, Rev. 2, Page 6 the secondary reference, if appropriately justified, consistent with current regulatory practice, and consistent with applicable NRC requirements. RG 1.212, Rev. 2, Page 7 C. STAFF REGULATORY GUIDANCE The staff finds that IEEE Std. 485-2020 provides methods acceptable to the NRC staff for complying with the design requirements for stationary battery applications in full-float operation for production and utilization facilities, subject to the following limitations and a clarification: 1. Annex A to IEEE Std. 485-2020 is informative and provides sample sizing demonstrations. Unless otherwise stated in a separate regulatory position, endorsement of IEEE Std. 485-2020 does not include endorsement of this annex. 2. Annex B to IEEE Std. 485-2020 is informative and provides a method for estimating battery terminal voltage at various points in the battery duty cycle using the manufacturer’s typical discharge characteristics. Unless otherwise stated in a separate regulatory position, endorsement of IEEE Std. 485-2020 does not include endorsement of this annex. 3. Annex C to IEEE Std. 485-2020 is informative and provides a method for considering other cell types when selecting a battery for its intended application. Unless otherwise stated in a separate regulatory position, endorsement of IEEE Std. 485-2020 does not include endorsement of this annex. 4. Annex D to IEEE Std. 485-2020 is informative and provides a method for sizing a battery properly for a constant power application and for converting from