This letter will serve as notification from EnerSys to the United States Nuclear Regulatory Commission of an identified deviation in published literature information. The literature defines requirements for resistance in both cell to cell and cell to terminal connections in supplied battery systems. High connection resistance causes increased cell voltage drop and a potential failure to meet run time requirements.
Internal investigation by EnerSys confirms that no defects exist in systems tested before shipment to customer utilities as internal documented procedures define correct parameters. However, the potential of less than desired performance exists if the values noted in the literature are used during installation and test at utility sites.
EnerSys does not have the ability to evaluate if a defect exists at customer utilities so per the provisions of Part 21, notification is being made to both the Commission and affected EnerSys customers.
POC: 800-538-3627 ext. 1974
- * * UPDATE FROM WILLIAM ROSS TO STEVEN VITTO AT 1339 EDT on 09/02/2016 * * *
The literature in question is the EnerSys Safety, Storage, Installation, Operation and Maintenance Manual for Flooded Lead-Acid Batteries C, D, E, F and G, number US-FL-IOM-002 dated January 2007. The errors are located in Section 7.4.3.8c line 2. The current wording of '... connection is more than 30 percent or 5 Mohms above the average...' should read 'connection is more than 10 percent or 5 micro-ohms, whichever is greater, above the average'.
Licensees affected are Dominion North Anna, Dominion Surry Nuclear Power Plant, Energy Northwest Columbia Generating Station, Entergy Nuclear Operations IP2, First Energy Beaver Valley NPP, NextEra Energy Point Beach Nuclear Plant, Perry Nuclear Power Plant, and San Onofre Nuclear Generating Station.
Notified R1DO(Powell), R2DO (Bartley), R3DO (Dickson), R4DO (Warnick), and Part 21Group via email.