RS-20-042, Withdrawal of Proposed Relief Request I4-RS-1 to Use Code Case OMN-13

Withdrawal of Proposed Relief Request I4-RS-1 to Use Code Case OMN-13

ML20086J027
Person / Time
Site:	Clinton
Issue date:	03/26/2020
From:	Simpson P Exelon Generation Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RS-20-042
Download: ML20086J027 (2)

Text

4300 Winfield Road Warrenville, IL 60555 630 657 2000 Office RS-20-042 10 CFR 50.55a March 26, 2020 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Clinton Power Station, Unit 1 Facility Operating License No. NPF-62 NRC Docket No. 50-461

Subject:

Withdrawal of Proposed Relief Request I4-RS-1 to Use Code Case OMN-13

Reference:

1. Letter from P. R. Simpson (Exelon Generation Company, LLC) to U.S. NRC, "Relief Request I4-RS-1 to Use Code Case OMN-13," dated December 11, 2019

2. Volume 85, Federal Register, Page 14736 (85FR14736), "Approval of American Society of Mechanical Engineers' Code Cases," dated March 16, 2020 In Reference 1, Exelon Generation Company, LLC (EGC) requested NRC approval of a relief request for Clinton Power Station (CPS), Unit 1. The proposed relief request would allow use of American Society of Mechanical Engineers (ASME) Code Case OMN-13, "Performance-Based Requirements for Extending Snubber Inservice Visual Examination Interval at LWR Power Plants," Revision 2, during the fourth interval of the CPS Inservice Test program. The fourth interval of the CPS Inservice Test program complies with the ASME Code for Operation and Maintenance of Nuclear Power Plants (i.e., OM Code), 2012 Edition. Although this Code Case has been unconditionally approved for use in Regulatory Guide (RG) 1.192, "Operation and Maintenance Code Case Acceptability, ASME OM Code," Revision 2, relief was requested because the Applicability section of the Code Case states that it is applicable to the ASME OM Code 1995 Edition through 2011 Addenda (i.e., which does not include the 2012 Edition that is applicable to the CPS Inservice Test program).

In Reference 2, a final rule was published in the Federal Register that, in part, incorporated by reference Revision 3 of RG 1.192. As stated in the Federal Register, the NRC has moved Code Case OMN-13, Revision 2, to Table 2 in RG 1.192 to clarify its acceptance for use with all editions and addenda of the OM Code listed in 10 CFR 50.55a(a)(1)(iv). Based on this final rule, which becomes effective on April 15, 2020, the relief requested in Reference 1 is no longer needed. Therefore, EGC is withdrawing the proposed relief request.

March 26, 2020 U.S. Nuclear Regulatory Commission Page 2 There are no regulatory commitments contained within this letter. Should you have any questions concerning this letter, please contact Mr. Kenneth M. Nicely at (630) 657-2803.

Respectfully, PJ;;;tR~

Patrick R. Simpson Sr. Manager Licensing cc:

NRC Regional Administrator, Region Ill NRC Senior Resident Inspector-Clinton Power Station