|PART 21 REPORT - CONTAINER FAILURE IN KCR-07 BATTERIES
The following is a synopsis of a Part 21 report received by email:
"On December 6, 2019, Browns Ferry Nuclear Plant notified C&D of an issue with a KCR-07 battery where a crack had developed in the container wall, and electrolyte levels had dropped below the low-level line. C&D issued a Return Material Authorization to the customer, and the batteries were returned and analyzed. On February 3, 2020, this battery was analyzed, and the cause of the crack was determined to be caused by expansion of the post seals directly stressing the container walls. Although this unit passed capacity testing after return to C&D, undetected loss of electrolyte in field units could impact the operability of KCR-07 systems in the field. Accordingly, C&D is submitting this report to the NRC and notifying C&D's customers that use KCR-07 batteries[, manufactured prior to January 2012,] of this report.
"The battery manufacturing date is on the label.
"C&D implemented corrective actions to eliminate expansion of the positive post seal and to reinforce cover designs in 2011. Information from laboratory testing and field experience has shown that these corrective actions were effective at eliminating excessive stress in the post seal, cover, and container.
"If you have any questions or wish to discuss this matter or this report, please contact:
Robert Malley, VP Customer Experience, email@example.com, (215) 619-7830 [or]
Kristen Jamison, Nuclear Applications Engineer, firstname.lastname@example.org, (215) 775-1306."
The following Utilities/Plants are affected: Exelon Fitzpatrick, Exelon Limerick, First Energy Perry, TVA Browns Ferry, TVA Sequoyah, TVA Watts Bar.