Three Mile Island Nuclear Station, Unit 1 - Request for Additional Information Regarding License Amendment Request to Adopt Technical Specification...

Letter from the NRC to Exelon:

By letter dated November 6, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML083120122), supplemented by letters dated December 11,2008, (ADAMS Accession No. ML083470249), and July 2,2009 (ADAMS Accession No. ML091870996), AmerGen Energy Company, LLC (the licensee, now Exelon Generation Company, LLC) submitted a license amendment request regarding proposed changes to the technical specifications (TSs) for Three Mile Island Nuclear Station, Unit 1 (TMI-1). The proposed amendment would replace the current TMI-1 TS limit on Reactor Coolant System (RCS) gross specific activity with a new limit on RCS noble gas specific activity. The noble gas specific activity limit would be based on a new dose equivalent Xenon-133 definition that would replace the current E Bar average disintegration energy definition. In addition, the current dose equivalent lodine-131 definition would be revised.

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