Exelon Generation Company, LLC and MidAmerican Energy Company Quad Cities Nuclear Power Station, Units 1 and 2

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The U.S. Nuclear Regulatory Commission (NRC) has issued an exemption in response to a July 22, 2019, request from Exelon Generation Company, LLC, from certain regulatory requirements in order to permit exclusion of main steam isolation valve (MSIV) leakage from the overall integrated leak rate Type A test measurement and MSIV pathway leakage contributions from the combined leakage rate of all penetrations and valves subject to Type B and Type C tests.