ML19320A867
| ML19320A867 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 07/03/1980 |
| From: | Kay J YANKEE ATOMIC ELECTRIC CO. |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| WYR-80-75, NUDOCS 8007080079 | |
| Download: ML19320A867 (8) | |
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Telephone bl7 366-90\\\\
4 TwX 7t0-390-0739 YANKEE ATOMIC ELECTRIC COMPANY B321 WYR 80-75
.Yimx$
20 Turnpike Rood Westborough, Mossochusetts 01581 se N
July 3, 1980 1
United States Nuclear Regulatory Commission Washington, D.C.
20555 Attention:
Mr. Dennis M. Crutchfield, Chief Operating Reactors Branch #5 Division of Licensing
Reference:
(a) License No. DPP.-3 (Docket No. 50-29)
(b) USNRC Letter to YAEC dated November 9, 1979 (c) USNRC Letter to YAEC dated June 16, 1960
Subject:
Auxiliary Feedwater Pump Endurance Test
Dear Sir:
As required in Reference (b), we have performed an endurance test of the auxiliary feed <ater pump.
Th roughou t the test and subsequent one hour re-run, all parameters remained within normal operating ranges. The specific information requested in the attachment to Reference (c) is provided below:
(1) Testing was performed in accordance with the specified criteria with the exception of steam temperature. This exception is unique to Yankee and was discussed with and agreed to by the staff prior to the test.
During the test, steam temperature at the turbine inlet was as close to the actual operating steam temperature as practicable, however, was less than the 4000F criteria in Reference (b).
Steam supplied to the turbine control valve is throttled upstream to 100 psig (see drawing M-24) and results in a maximum achievable temperature during any transient of approximately 3600F (i.e. throttling is a constant enthalpy process). The test was run operating the auxiliary boilers at 125 psig (maximum capacity) to bring the steam temperature to within 200F of the worst case.
The auxiliary feedwater pump is a turbine driven positive displacement reciprocating pump. The pump was run continuously for a period of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> with the pump in the recirculating mode and taking suction from TK-1 or TK-39 at a discharge pressure of greater than or equal to 950 and less than 1050 psig (see drawing M-14).
Design flow was verified by monitoring pump speed using a strobe tachometer.
Pump discharge and steam supply pressure were monitored THIS DOCUMENT CONTAINS 8007080 373 POOR QUALITY PAGES 4 I
U. S. Nuc1ccr R2gulctory C:mmission Page 2 Attenti:n Mr. DInnis M. Crutchfield July 3, 1980 r,
using test gauges.- Bearing temperatures were monitored using a pyrometer and vibration readings were taken with a hand held instrument. A psychrometer was used to _ measure humidity and a thermometer installed for temperature.
Bearing temperatures were measured at the following locations:
Turbine oupling end bearing (#2) thrust bearing (#1)
Pump pinion counter shaft gear box bearings (#2 and 4) eccentric gear shaft gear box bearings (#1 and 3)
(2) All test. conditions measured within acceptable limits. All bearing
. temperatures measured below the 2000F maximum allowed.
Pump gland seal water temperature averaged between 1050F and 1100F, well below the 1600F maximum allowed.
(3) The attached plots of bearing temperature vs. time demonstrate that the bearing temperature design limits were not exceeded. The low readings indicated at appproximately 28 hours3.240741e-4 days <br />0.00778 hours <br />4.62963e-5 weeks <br />1.0654e-5 months <br /> into the test were due to a slight amount of anti-seize-lubricant on the end of the probe.
(4) The attached plots of pump room temperature and humidity vs. time show that the. pump room ambient conditions remained below excessive limits. Temperatures remained below 1000F and humidity remained below 40%. Ventilation equipment was secured for the duration of the test.
(5) Pump vibration did not exceed allowable limits during tne test.
Vibration measured between the allowed range of 1-3 mils.
We trust this information is satisfactory; however, if you have any questions, please contact us.
Very truly-yours, YANKEE ATOMIC ELECTRIC COMPANY J. A. Kay Senior Engineer - Licensing JAK/kaf Attachment I
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