ML19345H646
| ML19345H646 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 05/13/1981 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| NUDOCS 8105210533 | |
| Download: ML19345H646 (4) | |
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(/Ll Docket Nos. 50-329 EAdensam 9
and 50- 330 DHood I' N 1 S 198l Ag RTedesco
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Mr. J. W. Cook OI&E(3) 4 N
Vice President ACRS(16) co Consumers Power Company 1945 West Parnall Road bec: TERA Jackson, Michigan 49201 NSIC
Dear Mr. Cook:
SUBJECT:
ENDURANCE TEST REQUIREMENTS FOR AUXILIARY FEEDWATER SYSTEMS AT MIDLAND PLANT On April 24, 1980, we advised you of our requirements for the auxiliary feedwater (AFW) systens of operating license applicants of nuclear steam supply systems designed by Babcock and Wilcox. These requirements were identified during the course of the NRR Bulletins and Orders Task Force review of operating reactors, following the accident at Three Mile Island, Unit No. 2.
Paragraph 5.3.2 of the April 24, 1980 letter contained a recomendation that a 72-hour endurance test be performed on all AFW syste pumps. Since that letter was issued the endurance pump recomendation was revised to a 48-hour tes t.
The revised reconsnendation is provided in the enclosure to this letter.
We request that you revise your response provided in FSAR Appendix 10A.3 to comit to performing 48-hour endurance tests and providing the data as out-lined in the revised recomendation.
Sincerely, original signed by g@egt L Tedeooo Robert L. Tedesco, Assistant Director for Licensing Division of Licensing
Enclosure:
l As stated cc w/ encl: See next page N105210533 :
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ENCLOSURE REVISION TO RECOMMENDATION N0. 2 0F " ADDITIONAL SHORT TERM REC 0feENDATIONS" REGARDING AUXILIARY FEEDWATER PUMP ENDURANCE TEST Tne licensee should perform an endurance test on all AFW system pumps. The test should continue for at least 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> after achieving the following test conditions;
- Pump,ldt 4ver operating at rated speed; Pump developing rated discharge pressure'and riow or some higher pressure at a reduced flow but not excee#.ng the pump vendor's maximum pennitted discharge pressure value for a 48-hour te-t; and
- For turbine drivers, steam temperature should be as close to normal operating steam temperature as practicable but in no case should the temperature be less..than 400*F.
Following the 48-hour pump run, the pumps should be shut down and allowed to cool down until pump temperatures reduce to within 20*F of their values at the start of the 48-hour test.and at least 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> have elapsed.
Following the cooldown, the pumps should be restarted and run for one hour. Test l
acceptance criteria should include demonstrating that the pumps remain within t
design limits with respect to bearing / bearing oil temperatures and vibration and that ambient pump room conditions (temperature, humidity) do not exceed l
environmental qualification limits for safety-related equipment in the room. ~
l The licensee should provide a sumary of the conditions and results of the tes ts. The summary should include the following:
(1) A brief description of the test method (including flow schematic diagram) and how the test was instrumented f l al.
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. (i.e., where and how bearing-temperatures were measured).
(2) A discussion of-how the test conditions (pump low, head, speed and steam temperature) comoare to design operating conditions, (3) Plcts of bearing / bearing oil temperature vs.
time for ::ch bearing of each AFW pump / driver demonstrating that temperature design limits were not exceeded, (4) A plot of pump room ambient temperature and humidity va. time cemonstrating that the pump room amuent conditions do not exceed environmental qualification limits for safety-related equipment in the room, (5) A statement confirming that the pump vibration did not exceed allowable limits during tests.
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Mr. J. W. Cook Vice President Consumers Power Company 1945 West Parnall Road Jackson, Michigan 49201 cc: Michael I. Miller, Esq.
Mr. Don van Farowe, Chief Ronald G. Zamarin, Esq.
Division of Radiological Health Alan S. Farnell, Esq.
Department of Public Health Isham, Lincoln & Beale P.O. Box 33035 Suite 4200 Lansing, Michigan 48909 1 First National Plaza Chicago, Illinoi; 60603 James E. Brunner, Esq.
William J. Scanlon, Esq.
Consumers Power Company 2034 Pauline Boulevard 212 West Michigan Avenue Ann Arbor, Michigan 48103 Jackson, Michigan 49201 U. S. Nuclear Regulatory Comission Myron M. Cherry, Esq.
Resident Inspectors Office 1 IBM Plaza Route 7 Chicago, Illinois 60611 Midland, Michigan 48640 Ms. Mary Sinclair Ms. Barbara Stamiris 5711 Sumerset Drive 5795 N. River Midland, Michigan 48640 Freeland, Michigan 48623 Frank J. Kelley, Esq.
Attorney General State of Michigan Environmental Protection Division 720 Law Building Lansing, Michigan 48913 Mr. Wendell Macshall Route 10 Midland, Michigan 48640 i
Mr. Steve Gadler 2120 Carter Avenue St. Paul, Minnesota 55108 l,r p