L-2013-073, Extended Power Uprate Cycle 26 Startup Report, Supplement 1
| ML13071A345 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 02/26/2013 |
| From: | Kiley M Florida Power & Light Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| L-2013-073 | |
| Download: ML13071A345 (2) | |
Text
L-2013-073 10 CFR 50.36 0FEB 2 6 2013 FPL.
U. S. Nuclear Regulatory Commission Attn.: Document Control Desk Washington, D.C. 20555-0001 Re:
Turkey Point Unit 3 Docket No. 50-250 Renewed Facility Operating License No. DPR-31 Extended Power Uprate Cycle 26 Startup Report - Supplement 1
References:
(1)
J. Page (NRC) to M. Nazar (FPL), Turkey Point Units 3 and 4-Issuance of Amendments Regarding Extended Power Uprate (TAC Nos. ME4907 and ME 4908), Accession No. ML11293A365, June 15, 2012.
(2)
M. Kiley (FPL) to U. S. Nuclear Regulatory Commission (NRC) (L-2012-426), Renewed Facility Operating License No. DPR-31 Extended Power Uprate Cycle 26 Startup Report, Accession No. ML12341A097, December 4, 2012.
Pursuant to Turkey Point Unit 3 Technical Specification (TS) 6.9.1.1, Florida Power & Light Company (FPL) is providing a 90 day supplemental report to the Unit 3 Cycle 26 Startup Report submitted on December 4, 2012 via Reference 2. The Startup Report and supplemental report are required due to the implementation of Unit 3 Amendment No. 249 for the Extended Power Uprate (EPU) Project that was issued via Reference 1.
At the time that the initial Startup Report [Reference 2] was issued, Turkey Point Unit 3 had not reached the 100% EPU power level due to excessive steam and feedwater flow oscillation above 99% power. Single channel Hi steam flow and feed flow/steam flow mismatch alarms were being received at approximately 99.7% power which was considered exceeding test acceptance criteria.
Unit 3 power was lowered to approximately 99.5% power to reduce these oscillations to normal levels while the cause of the alarms was determined and corrective actions implemented.
It has since been determined that the alarms were caused by flow induced turbulence in the feedwater and main steam lines. Since the initial Startup Report [Reference 2] was issued, FPL has taken corrective actions to modify the steam flow and feedwater flow circuits and thereby eliminate the alarms such that Unit 3 has been able to reach 100% rated thermal power (RTP).
However, the remaining 10% transient ramp test at 100% RTP has not been performed due to two unscheduled outages. Therefore, an additional supplemental report will be required to address the complete 100% RTP power ascension testing when Unit 3 is returned to 100% RTP.
Turkey Point Unit 3 L-2013-073 Docket No. 50-250 Page 2 of 2 Should you have any questions regarding this submittal, please contact Mr. Robert Tomonto, Turkey Point Licensing Manager, at 305-246-7327.
Sincerely, Michael Kiley Site Vice President Turkey Point Nuclear Plant cc:
USNRC Regional Administrator, Region II USNRC Project Manager, Turkey Point Nuclear Plant USNRC Senior Resident Inspector, Turkey Point Nuclear Plant