Document: NRC Regulatory Guide
Document ID: dfb24267-98c5-442f-8325-3b1dee97bc46
Document Type: regulatory_guide
Title: Maintenance, Testing, and Replacement of Vented Lead-Acid Storage Batteries for Production and Utilization Facilities + HISTORY – HISTORY 08/2022 – DG-1401 , Proposed Revision 4 03/2013 – DG-1269 , Proposed Revision 3 10/2006 – DG-1155 , Proposed Revision 2 Prior to the issuance of DG-1155, RG 1.129 was entitled "Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Nuclear Power Plants" (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2202/ML22026A441.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.129
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CFR Title: 

Content:
est at any time. If the battery has been sized in accordance with RG 1.212, which endorses IEEE Std. 485, then the battery is acceptable if it delivers a tested capacity of 80 percent or greater. This statement should be replaced with the following: A modified performance test can be used in lieu of a service test and/or a performance test when the service and/or performance tests are scheduled to be performed. The modified performance test should follow the “Rules for Modified Performance Tests” in Annex I, “Modified Performance Testing Methods and Examples,” to IEEE Std. 450-2020. If the battery has been sized in accordance with RG 1.212, which endorses IEEE Std. 485, the battery is acceptable if (1) it delivers a tested capacity of greater than 80 percent, and (2) there are no indications of degradation as stated in Section 6.3 of IEEE Std. 450-2020. The modified performance test/service test should be performed with intervals not to exceed 24 months. However, when modified performance test/service test results show that the battery has degraded or has reached 85 percent of its expected service life with a capacity lower than 100 percent of the manufacturer’s rating, modified performance testing should be performed on an annual basis. 8. Section 7.7, “Restoration,” of the IEEE Std. 450-2020 recommended practices should be supplemented with the following: Following the recharge and before returning the battery to service, record the float voltage of each cell of the string. DG-1401, Page 9 D. IMPLEMENTATION The NRC staff may use this RG as a reference in its regulatory processes, such as licensing, inspection, or enforcement. However, the NRC staff does not intend to use the guidance in this RG to support NRC staff actions in a manner that would constitute backfitting as that term is defined in 10 CFR 50.109, “Backfitting,” and as described in NRC Management Directive 8.4, “Management of Backfitting, Forward Fitting, Issue Finality, and