Document: NRC Regulatory Guide
Document ID: 7ff7fac8-958f-48d8-82dd-0c18b1b6e487
Document Type: regulatory_guide
Title: Installation Design and Installation of Vented Lead-Acid Storage Batteries for Nuclear Power Plants + HISTORY – HISTORY 01/2024 – DG-1421 , Proposed Revision 3 10/2006 – DG-1154 , Proposed Revision 2 Prior to the issuance of DG-1154, RG 1.128 was entitled "Installation Design and Installation of Large Lead Storage Batteries for Nuclear Power Plants" (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2327/ML23277A276.pdf
Revision Date: 2024-01
Chapter: 
Section ID: RG-1.128
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Content:
sembly, assembly, and charging of vented lead-acid batteries. IEEE Std. 484-2019 is an updated consensus standard that adds new recommendations and guidance, as well as informative annexes, for vented lead-acid batteries for stationary applications. The standard was developed by the IEEE Power Engineering Society Energy Storage and Stationary Battery Committee and approved by the IEEE Standards Association Standards Board on November 7, 2019. The standard is applicable to vented lead-acid batteries only and does not pertain to valve-regulated lead-acid batteries. Consideration of battery types other than vented lead-acid is beyond the scope of this RG. Additionally, sizing, maintenance, capacity testing, charging equipment, and dry-charged units are beyond the scope of the IEEE standard and this RG. Portions of IEEE Std. 484-2019 continue to be directed toward recommendations in the area of battery room cleanliness and ventilation, temperature control, ground fault detection, and fire prevention. Battery room cleanliness and ventilation are important because the battery chemistry for lead-acid storage batteries is sensitive to contaminants and temperatures above and below the manufacturer’s rating. In addition, the batteries release hydrogen (a potential fire hazard) to the battery room during charging. The NRC also has regulatory guidance for preventing fires in battery rooms; however, some of its elements (such as the value for the hydrogen accumulated limits, air flow sensors and alarms in the control room, and fire detection design features) are not included in this IEEE standard. The staff notes that IEEE Std. 1635/American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) Guideline 21, “Guide for the Ventilation and Thermal Management of Batteries for Stationary Applications” (Ref. 16), provides helpful ventilation calculations that are associated with IEEE Std. 484. IEEE Std 484-2019 discusses mounting arrangements that allow