BYRON 2005-0053, Revision to Expected Supplemental Report Submittal Date for Licensee Event Report (LER) 454-2004-001-00, Reactor Containment Fan Coolers Flow Rates Below Technical Specification Requirements Due to Inaccurate Flow Indication.

Revision to Expected Supplemental Report Submittal Date for Licensee Event Report (LER) 454-2004-001-00, Reactor Containment Fan Coolers Flow Rates Below Technical Specification Requirements Due to Inaccurate Flow Indication.

ML051220322
Person / Time
Site:	Byron
Issue date:	04/29/2005
From:	Kuczynski S Exelon Generation Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
1.10.0101, BYRON 2005-0053, LER 2004-001-00
Download: ML051220322 (1)

Text

April 29, 2005 LTR: BYRON 2005-0053 File: 1.10.0101 United States Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Byron Station, Unit 1 Facility Operating License No. NPF-37 NRC Docket No. STN 50-454

Subject:

Revision to Expected Supplemental Report Submittal Date for Licensee Event Report (LER) 454-2004-001-00, Reactor Containment Fan Coolers Flow Rates Below Technical Specification Requirements Due to Inaccurate Flow Indication

Reference:

Stephen E. Kuczynski to NRC Document Control Desk, Licensee Event Report (LER) 454-2004-001-00, Reactor Containment Fan Coolers Flow Rates Below Technical Specification Requirements Due to Inaccurate Flow Indication, dated October 17, 2005 In the referenced LER, we indicated that we expected to submit a supplemental report after further investigation into the root cause of the inaccurate flow indication for the reactor containment fan coolers in the Unit 1 spring 2005 refuel outage. The investigation during the refuel outage was inconclusive and further investigation is needed before the root cause can be determined. The investigation will continue and we now expect to submit the supplemental report in July 2005 timeframe.

Should you have any questions concerning this matter, please contact Mr. William Grundmann, Regulatory Assurance Manager, at (815) 234-5441, extension 2800.

Respectfully, (signed by)

Stephen E. Kuczynski Site Vice President Byron Nuclear Generating Station SED\JL\rah