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
CFR Part: 
CFR Title: 

Content:
ell should be based on the lowest voltage cell(s) in the battery, and the frequency of specific gravity measurements should be reduced so as to not over-sample the cell(s). When using specific gravity measurements to indicate a fully charged condition, the pilot cell(s) should have an individual cell voltage (ICV) equal to the average of all ICVs of the battery to allow for rotating pilot cells annually so that no one cell is over-sampled. 10. For Section 6.4.1, “Freshening charge sequence,” items b and d, “pilot unit” should be replaced with “pilot cell.” A pilot cell is defined as “A cell chosen to represent the operating parameters of the entire battery or a subset of the battery. NOTE— Multiple pilot cells may be used.” 11. Section 6.4.2, “Data collection,” should be supplemented with the following, as data to be recorded after the freshening charge: e) A hydrogen survey should be performed to verify that the design criteria required by Section 5.5, ‘Ventilation,’ are met (see Section 7.1, “General”). 12. Section 6.4.4, “Acceptance test,” should be replaced with the following: Upon initial installation, the battery’s capability should be demonstrated by completing a service test or modified performance test in accordance with RG 1.129. If factory tests did not include capacity tests, the battery’s capacity should also be demonstrated by completing a performance test or modified performance test in accordance with RG 1.129. 13. Section 7.1, “General,” should be supplemented with the following: - Initial hydrogen survey data DG-1421, Page 9 14. IEEE Std. 484-2019 should be supplemented by adding section 8.0, as follows: 8.0 Quality Assurance Program For nuclear power plants, where the battery performs a Class 1E function, a quality assurance program that meets the requirement of 10 CFR Part 50, Appendix B, shall be adopted to control and document all activities related to such functions. DG-1421, Page 10 D. IMPLEMENTATION