ML023600295
| ML023600295 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 12/05/2002 |
| From: | Hopkins L Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NMP2L 2078 | |
| Download: ML023600295 (4) | |
Text
P.O. Box 63 Lycoming, New York 13093 Constellation Energy Group Nine Mile Point Nuclear Station December 5, 2002 NMP2L 2078 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
Subject:
Nine Mile Point Unit 2 Docket No. 50-410; NPF-69 Monthly Operating Report for November 2002 Gentlemen:
Submitted herewith is the Operating Data Report, the Unit Shutdowns, and Summary of Operating Experience for November 2002.
Very truly yours, Lawrence A. Hopkins Plant General Manager LAH/jm Attachments cc:
Mr. H. J. Miller, NRC Regional Administrator, Region I Mr. G. K. Hunegs, NRC Senior Resident Inspector
NINE MILE POINT NUCLEAR STATION UNIT #2
SUMMARY
OF OPERATING EXPERIENCE Nine Mile Point Unit Two operated with a capacity factor (MDC) of 55.67% and an availability factor of 56.6% for the month of November 2002.
On November 11, 2002 at 0515 hours0.00596 days <br />0.143 hours <br />8.515212e-4 weeks <br />1.959575e-4 months <br />, Nine Mile Point Unit 2 automatically scrammed on a high reactor vessel pressure signal. The cause of the high pressure condition was the separation of Main Steam Isolation Valve 2MSS*AOV7B's disc from its stem, which served to abruptly stop all flow through the "B" steam line. Subsequently, all eight Main Steam Isolation Valves (MSIVs) received an automatic closure signal, due to high steam flow and closed. An extent of condition review found two more MSIVs susceptible to the same problem. All three valves were opened for inspection and have been modified or repaired as appropriate. Following post SCRAM review, the reactor was brought critical at 1106 hours0.0128 days <br />0.307 hours <br />0.00183 weeks <br />4.20833e-4 months <br /> on November 23, 2002. The generator was synchronized to the grid at 0544 hours0.0063 days <br />0.151 hours <br />8.994709e-4 weeks <br />2.06992e-4 months <br /> on November 24, 2002, ending forced outage 02-02. Full power was achieved at 2127 hours0.0246 days <br />0.591 hours <br />0.00352 weeks <br />8.093235e-4 months <br /> on November 26, 2002.
On November 27, 2002 at 2258 hours0.0261 days <br />0.627 hours <br />0.00373 weeks <br />8.59169e-4 months <br />, Operations commenced lowering power to 90% for control rod pattern adjustment. After completion of the planned rod manipulations full power was restored on November 28, 2002 at 0300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br />.
Two (2) Safety Relief Valves opened automatically as a result of pressure rise from the MSIV closure and plant SCRAM event on November 11, 2002. Operations subsequently used Safety Relief Valves to stabilize reactor pressure and control reactor depressurization/cool down rate.
312-5 A
3 MSIV 2MSS*AOV7B had its stem and disc separate, causing "B" steam line to isolate. This resulted in a reactor high pressure signal scramming the reactor and a high steam flow signal closing all the remaining MSIVs.
Extent of condition indicated two additional valves could be susceptible to the same problem All three valves were inspected and modified or repaired as appropriate.
I.
UNIT SHUTDOWNS APPENDIX B REPORTING PERIOD - NOVEMBER 2002 DOCKET NO: 50-410 UNIT NAME: NMP#2 DATE: 12/02/02 Prepared by: T. McMahon TELEPHONE: (315) 349-4045 Duration Method of Cause & Corrective Actions No.
Date Type (Hours)
Reasons' Shutting Down 2 Comments F.Forced S: Scheduled F
02-02 U
.5.
J 1
5
.5.
.5.
Reason:
A-Equipment Failure (Explain)
B-Maintenance or Test C-Refueling D-Regulatory Restriction E-Operator Training & License Exam F-Administrative G-Operational Error (Explain)
H-Other (Explain)
Method I-Manual 2-Manual Trip/Scram 3-Automatic Trip/Scram 4-Continuation 5-Other (Explain) 021111
OPERATING DATA REPORT DOCKET NO.
DATE:
COMPLETED BY:
TELEPHONE:
50-410 12/02/2002 T. P. McMahon (315) 349-4045 OPERATING STATUS Unit Name:
Reporting Period
- 1. Design Electrical Rating (MWe)
- 2. Maximum Dependable Capacity (Net MWe)
- 3. Number of Hours Reactor was Critical:
- 4. Hours Generator On-Line:
- 5. Reactor Reserve Shutdown Hours:
6 Net Electrical Energy Gen (MWH)
Nine Mile Point Unit #2 November 2002 1,143.3 1,119.8 This Month 426.1 407.5 0.0 448,854.0 Yr-to-Date 6,998.4 6,927.6 0.0 7,817,839.2 Cumulative 102,201.6 99,308.6 0.0 103,876,171.9