2020/05/22 NRR E-mail Capture - Exelon Generation Company, LLC - Request for an Alternative to Use ASME Code Case N-885 (EPID L-2020-LLR-0069)

Mr. Loomis:

By application dated April 28, 2020 (ADAMS Accession No. ML20119B061), Exelon Generation

Company, LLC (the licensee) submitted a request in accordance with Paragraph 50.55a(z)(1) of

Title 10 of the Code of Federal Regulations (10 CFR) for a proposed alternative to the

requirements of 10 CFR 50.55a and the American Society of Mechanical Engineers (ASME)

Code at Braidwood Station, Units 1 and 2; Byron Station, Unit Nos. 1 and 2; Calvert Cliffs

Nuclear Power Plant, Units 1 and 2; and R. E. Ginna Nuclear Power Plant The proposed

alternative would allow the licensee to use ASME Code Case N-885, “Alternative Requirements

for Table IWB-2500-1, Examination Category B-N-1, Interior of Reactor Vessel, Category B-N-2,

Welded Core Support Structures and Interior Attachments to Reactor Vessels, Category B-N-3,

Removable Core Support Structures Section XI, Division 1,” at these facilities.

ML20149K430.pdf