ML032661036
| ML032661036 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold  |
| Issue date: | 09/10/2003 |
| From: | Peifer M Nuclear Management Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| GL-97-002, NG-03-0642 | |
| Download: ML032661036 (3) | |
Text
N1i Committed to Nuclear Excelen Duane Arnold Energy Center Operated by Nuclear Management Company, LLC September 10, 2003 NG-03-0642 10 CFR 50.4 Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station 0-Pl-17 Washington, DC 20555-0001 DUANE ARNOLD ENERGY CENTER DOCKET 50-331 LICENSE No. DPR-49 AUGUST 2003 MONTHLY OPERATING REPORT Please find enclosed the Duane Arnold Energy Center Monthly Operating Report.
The report has been prepared in accordance with the guidelines of NRC Generic Letter 97-02: "Revised Contents Of The Monthly Operating Report," and distribution has been made in accordance with DAEC Technical Specifications, Section 5.6.4.
This letter contains no new commitments.
Site Vice-President, Duane Arnold Energy Center CC Regional Administrator, USNRC, Region IlIl Project Manager, USNRC, NRR NRC Resident Inspector (DAEC)
Enclosure:
OPERATING DATA REPORT 3277 DAEC Road
- Palo, Iowa 52324-9785 Telephone: 319.851.7611
4
September 10, 2003 Enclosure to NG-03-0642 Page 1 of 2 OPERATING DATA REPORT DOCKET NO.
UNIT NAME DATE COMPLETED BY TELEPHONE REPORTING PERIOD:
50-331 Duane Arnold I September 2, 2003 Richard Woodward (319) 851-7318 August 2003 1.
2.
Design Electrical Rating (MWe)
Maximum Dependable Capacity (MWe-Net) 581.40 565.50 3.
4.
5.
6.
Number of Hours the Reactor was Critical Number of Hours Generator On-line Reserve Shutdown Hours Net Electrical Energy Generated (MWHrs)
This Month 744.00 744.00 0.00 419.018.80 Yr-to-Date 4.895.27 4,820.79 0.00 2.732,875.30 Cumulative 1 99140.99 194.894.04 192.80 90.689.577.58 UNIT SHUTDOWNS IReason:
A Equipment Failure (Explain)
B Maintenance or Test C
Refueling D
Regulatory Restriction E
Operator Training & License Examination F
Administration G
Operational Error (Explain)
H Other (Explain) 2Method:
I Manual 2
Manual TriplScram 3
Automatic TriplScram 4
Continuation 5 Other (Explain)
NARRATIVE
SUMMARY
At the beginning of August, the DAEC had operated 102 days since completion of Refueling Outage 18. During the month, there were two departures from full-power operation: (1) an unplanned runback of both reactor water recirculation pumps on August 22, and (2) a load-line adjustment to 94.5% on August 24.
At 1300 on August 22, a runback of both reactor recirculation pumps to 45% occurred.
The plant was stabilized at approximately 64%. All other key plant parameters were stable and indicated within acceptable values.
September 10, 2003 Enclosure to NG-03-0642 Page 2 of 2 At the time of the reactor recirculation pump runback transient, a surveillance test was in progress which required changing the position of the Reactor Water Level Control Input Select Handswitch. If only a single reactor feed pump is running, a 45% runback may occur when switching this handswitch position. The runback occurs because this switch is a break before make design resulting in a momentary low level indication. The procedure cautions operators to verify that both reactor feed pumps are operating before switching the handswitch position. Operators complied and verified that both feed pumps were running. However, after the transient, it was noted that an auxiliary contact on the "B" reactor feed pump was not picked up. Subsequently, it was noted that the affected relay had failed and dropped out, resulting in the logic recognizing only the UA7 feedpump as running.