Difference between revisions of "ML20071P052"
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MISSISSIPPI POWER & LIGHT CO.
Office of Nuclear Reactor Regulation
|Download: ML20071P052 (3)|
Attachment 2 i F *.. f f .
AECM-83/ 0040 J r:::n l
U.S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, D.C. 20555 Attention: Mr. Harold R. Denton, Director
Dear Mr. Denton:
Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416 and 50-417 License No. FF-13 File 0260/! ;,50.0 Deep Draft Pump Reliability -
SER Section 1.10 (13)
AECM-82/491 In order to address the NRC's concerns for deep draft pump reliability as summarized in SER Sections 1.10 (13), 5.4.2, and 184.108.40.206, Mississippi Pover & Lght Company (MP&L) submitted AECM-82/460. However, the submittal contained a commitment to summarize the vibration monitoring analysis program for deep draf t pumps at a later date.
MP&L is providing as Attachment 1 the subject summary to close the issue of deep draft pump reliability for full power licensing. If you have any questions, please do not hesitate to contact us.
Yourspruy, pl:: <
'L. F. Dale Lekh Manager of Nuclear Services
Grand Gulf Deep Draft Pump Vibration Monitoring Trend Analysis Program c'c : Mr. N. L. Stampley (w/a) Mr. R. B. McGehee (w/o)
Mr. T. B. Conner (w/o) Mr. G. B. Taylor (w/o)
- Mr. Richard C. DeYoung, Director (w/a)
Office of Inspection & Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. J. P. O'Reilly, Regional Administrator (w/a)
Office of Inspction & Enforcement Region II
<) 1[ Y - .Atlanta101 Mariet,ta Street, N.W., Suite 3100 A s 30303 l yft N'( } Yl S O O !Y] , Ge rgia
CA M;5515SIPPI POWER & LIGHT COMPANY AECM-82/491 Page 2 bec: Mr. J. B. Richard (w/o)
Mr. A. Zaccaria (w/o)
Mr. R. S. Trickovic (w/a)
Mr. C. D. Wood (w/o)
Mr. J. F. Hudson, Jr. (w/o)
Mr. T. H. Cloninger (w/o)
- Mr. J. P. McGaughy (w/o)
Mr. T. E. Reaves (w/o)
Mr. C. K. McCoy (w/o)
Mr. J. W. Yelverton (w/ a)
Mr. A. R. Smith (w/o)
Mr. A. G. Wagner (w/a)
Mr. C. C. Hayes (w/a)
Mr. M. D. Houston (w/a)
Mr. J. F. Pinto (w/o)
Mr. M. D. Archdeacon (w/;)
File (LCTS) (w/s)
I . 3F ir. .
Attachment to AECM-82/491 Page 1 Grand Gulf Deep Draft Pump Vibration Monitoring Trend Analysis Program Each of the eight deep draft pumps listed below are functionally tested at periodic intervals of once per month.
- 1) RHR A Pump
- 2) RHR B Pump
- 3) RHR C Pump
- 4) LPCS Pump
- 5) HPCS Pump
- 6) SSV A Pump
- 7) SSW B Pump
- 8) HPCS SW Pump During each testing, vibration measurements are taken and included with the test results. The plant technical engineering staff reviews the test results and a graphical trend analysis of the vibration results is performed. This analysis compares test values with established base line values to ensure that acceptable values are not exceeded. The acceptable values and ranges are in accordance with the guidelines in ASME section XI, Article IWP-3000, manufacturers pump curves, and preoperational test procedures. The baseline values are a fixed set of values observed and measured with the pumps known to be operating acceptably. Two sets of readings are taken from two different parts of the pumps. Each reading each month is plotted. At present, test values and graphical analysis do not show any particular trends. As more data is collected, the graphs will be closely watched for any developing trends.