RS-09-105, Withdrawal of Request for Amendment to Technical Specifications Section 3.3.6.1, Primary Containment and Drywell Isolation Instrumentation, to Eliminate Requirements for Main Steam Line Isolation on High Turbine Building Temperature

Withdrawal of Request for Amendment to Technical Specifications Section 3.3.6.1, Primary Containment and Drywell Isolation Instrumentation, to Eliminate Requirements for Main Steam Line Isolation on High Turbine Building Temperature

ML092170159
Person / Time
Site:	Clinton
Issue date:	08/04/2009
From:	Hansen J Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RS-09-105, TAC ME1499
Download: ML092170159 (2)

Text

Exelom, Exelon Nuclear 4300 Winfield Road www.exeloncorp .co m Nuclear Warrenville, IL 60555 RS-09-105 August 4, 2009 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 Request for Amendment to Technical Specifications Section 3.3.6.1, "Primary Containment and Drywell Isolation Instrumentation," to Eliminate Requirements for Main Steam Line Isolation on High Turbine Building Temperature

References:

(1) Letter from P. R. Simpson (Exelon Generation Company, LLC) to U. S . NRC, "Request for Amendment to Technical Specifications Section 3.3.6.1,

'Primary Containment and Drywell Isolation Instrumentation,' to Eliminate Requirements for Main Steam Line Isolation on High Turbine Building Temperature," dated June 15, 2009 (2) Letter from J. L. Hansen (Exelon Generation Company, LLC) to U . S. NRC, "Request for Processing an Amendment to Technical Specifications Section 3.3.6 .1, 'Primary Containment and Drywell Isolation Instrumentation,' to Eliminate Requirements for Main Steam Line Isolation on High Turbine Building Temperature on an Emergency Basis," dated June 20, 2009 (3) Letter from S. P. Sands (U. S. NRC) to C. G. Pardee (Exelon Generation Company, LLC), "Clinton Power Station, Unit No. 1 - Re : Request for Amendment to Technical Specifications Section 3.3 .6 .1, 'Primary Containment And Drywell Isolation Instrumentation,' to Eliminate Requirements for Main Steamline Isolation on High Turbine Building Temperature (TAC NO. ME1499)," dated July 2, 2009 In Reference 1, Exelon Generation Company, LLC (EGC) requested an amendment to Facility Operating License No. NPF-62 for Clinton Power Station (CPS), Unit 1 . The proposed change was submitted to eliminate the potential for an unnecessary plant transient caused by a main steam line (MSL) isolation that is not credited in any CPS design basis or transient analysis . In Reference 2, EGC requested that the proposed change be evaluated and approved by the NRC on an emergency basis in accordance with 10 CFR 50.91(a)(5) . This request was made in response to elevated ambient air temperatures and equipment issues in the vicinity of the Turbine Building temperature instruments that were causing the instruments' MSL isolation

August 4, 2009 U . S . Nuclear Regulatory Commission Page 2 setpoints to be approached . While the NRC initially agreed to evaluate the proposed change on an emergency basis, ambient air temperatures did not increase as expected . In Reference 3, the NRC indicated that amendment request would no longer be processed as an emergency in accordance with 10 CFR 50 .91(a)(5) .

After internal discussions, EGC has determined that it no longer desires to pursue this amendment. Therefore, EGC is withdrawing the license amendment requested in Reference 1 .

EGC appreciates the NRC staffs' initial accommodation of our request to process this amendment on an emergency basis.

There are no regulatory commitments contained in this letter . Should you have any questions concerning this letter, please contact Mr. Mitchel A. Mathews at (630) 657-2819 .

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