TMI-13-055, Response to Request for Additional Information - 10 CFR 50.46 30-Day Report

Response to Request for Additional Information - 10 CFR 50.46 30-Day Report

ML13093A381
Person / Time
Site:	Three Mile Island
Issue date:	04/02/2013
From:	Jesse M Exelon Generation Co
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
TAC ME8237, TMI-13-055
Download: ML13093A381 (11)

Text

10 CFR 50.46 TMI-13-055 April 2, 2013 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Three Mile Island Nuclear Station, Unit 1 Renewed Facility Operating License No. DPR-50 NRC Docket No. 50-289

Subject:

Response to Request for Additional Information - 10 CFR 50.46 30-Day Report

References:

1) Letter from M. D. Jesse (Exelon Generation Company, LLC) to U.S. Nuclear Regulatory Commission, "10 CFR 50.46 30-Day Report,"

dated March 21 , 2012

2) Letter from P. Bamford (U.S. Nuclear Regulatory Commission) to M. J. Pacilio (Exelon Generation Company, LLC), "Three Mile Island Nuclear Station, Unit 1 - Request for Additional Information Regarding 30-Day Report for Emergency Core Cooling System Model Changes Pursuant to the Requirements of 10 CFR 50.46 (TAC NO. ME8237),"

dated November 13, 2012

3) Letter from P. Salas (AREVA NP Inc.) to U.S. Nuclear Regulatory Commission, "Generic RAI Response to a 30-Day 10 CFR 50.46 Report of Significant PCT Change," dated December 6, 2012

4) Letter from M. D. Jesse (Exelon Generation Company, LLC) to U.S. Nuclear Regulatory Commission, "Response to Request for Additional Information - 10 CFR 50.46 30-Day Report," dated December 12, 2012

5) Letter from P. Bamford (U.S. Nuclear Regulatory Commission) to M. J. Pacilio (Exelon Generation Company, LLC), "Three Mile Island Nuclear Station, Unit 1 - Request for Additional Information Regarding 30-Day Report for Emergency Core Cooling System Model Changes Pursuant to the Requirements of 10 CFR 50.46 (TAC NO. ME8237),"

dated March 5, 2013

Response to Request for Additional Information 10 CFR 50.46 30-Day Report April 2, 2013 Page 2

6) Letter from P. Salas (AREVA NP Inc.) to U.S. Nuclear Regulatory Commission, "Generic RAI Response to a 30-Day 50.46 Report of Significant PCT Change," dated March 28, 2013 In the Reference 1 letter Exelon Generation Company, LLC (Exelon) submitted a 30-day 10 CFR 50.46 report for Three Mile Island Nuclear Station (TMI), Unit 1. This letter discussed an AREVA NP Inc. (AREVA) notification concerning two Evaluation Model (EM) error corrections. In the Reference 2 letter the U.S. Nuclear Regulatory Commission requested additional information. References 3 and 4 provided the responses to this request.

In the Reference 5 letter the U.S. Nuclear Regulatory Commission requested additional information. In response to this request, AREVA has prepared a response to address these questions. This response is contained in Reference 6.

No new regulatory commitments are established in this submittal. If any additional information is needed, please contact Tom Loomis at (610) 765-5510.

Respectfully, Michael D. Jesse !

Director - Ucensingt & ulatory Affairs Exelon Generation Company, LLC cc: USNRC Administrator, Region I USNRC Project Manager, TMI, Unit 1 USNRC Senior Resident Inspector, TMI, Unit 1