Sizing of Large Lead-Acid Storage Batteries

The U.S. Nuclear Regulatory Commission (NRC) is issuing Revision 1 of Regulatory Guide (RG) 1.212, ``Sizing of Large Lead-Acid Storage Batteries.'' This RG endorses, with certain clarifications, the Institute of Electrical and Electronic Engineers (IEEE) Standard 485- 2010, ``IEEE Recommended Practice for Sizing Lead-Acid Batteries for Stationary Applications.'' This RG describes methods acceptable to the NRC for complying with the design requirements for vented lead-acid batteries used in stationary applications under full float operation for nuclear power plants.