ML20028G164
| ML20028G164 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 01/21/1983 |
| From: | Ash R BALTIMORE GAS & ELECTRIC CO. |
| To: | Clark R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8302070473 | |
| Download: ML20028G164 (4) | |
Text
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BALTIMORE GAS AND ELECTRIC CHARLES CENTER . P.O. BOX 14i5 BALTIMORE, MARYLAND 21203 ELECTRIC ENGINEERING DEPARTMENT office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Attn: Mr. Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing
Subject:
Calvert Cliffs Nuclear Power Plant Units Nos. 1 & 2; Dockets Nos. 50-317 & 50-318 Auxiliary Feedvater Pump Fndurance Tests
References:
a) LTR from Eisenhut to Lundvall, NRC Requirements for Aux Feedvater Systems at CCNPP 1 & 2, dated 11/7/79 b) LTR from Clark to Lundvall, Issuance of Amendments Nos. Sh & 37 to Facility Operating License, dated 5/8/81.
c) LTR from Lundvall to Clark, NRC Requirements for Aux Feedvater System, dated 3/9/81.
d) LTR from Ash to Clark, Aux Feedvater Pump Endurance j Tests, dated 6/23/81.
Gentlemen:
Additional Short Term Recommendation 2 of reference (a) required that a 72-hour endurance test be performed for each Auxiliary Feedvater (AFW) pump. Reference (b) changed the requirement to a h8-hour endurance test followed by a one-hour run after the pump had been cooled down.
Reference (b) also acknowledged satisfactory completion of the test for APW pump no. 11. Reference (c) was our commitment to test AFW pumps nos.
12, 21, 22, and the motor driven pumps when installed. Reference (d) forwarded the results of the testing on pumps 12, 21 and 22.
3 During the Unit 2 Cycle 5 refueling outage, we completed the installation of No. 23 AFW pump. The required endurance testing was performed on this pump in mid December prior to startup of the unit. This letter forwards the results of our testing.
The results are summarized as follows:
(1) Enclosure (1) is a flow schematic of the teat. The AFW pump was run at normal rated RPM (nominal value of 3560 RPM), taking suction from the condensate storage tank and returning the water via 8302070473 830121 \
Mr. R. A. Clark Pags 2 January 21, 1983 the recirculation line. A digital strobe was used to verify pump speed. Pump speed did not vary by more than 0.6% from the nominal value.
(2) A vibro pac was used to measure pump and motor vibration. The results were satisfactory.
4 (3) A psychrometer was used to measure the room hunidity. It should be noted that No. 23 AFW pump is located in the Unit 2 Service Water Heat Exchanger Room. Enclosure (2) contains plots of the rooms temperature and humidity. The ambient conditions in the room did not exceed the environmental qualification limits for safety related equipment in the room.
(h) The pump flow and head was compared to curves supplied by the vendor with satisfactory results. The head did not vary by more than +3 percent of the pump curves.
(5) plots of bearing temperature vs. time for the pump and motor are included in Enclosure 2. Pump bearing oil temperature should not exceed 170 F and motor bearing temperature should remain below 19h F. As can be seen from Enclosure 2, these limits were maintained.
Should you have any questions, feel free to contact us.
Very truly yours,
'a L.
Robert F. Ash Supervising Engineer RFA/WCH/smn ec: J. A. Biddison, Esquire G. F. Trowbridge, Esquire Messrs. D. H. Jaffe, NRC R. E. Architzel, NRC J. C. Ventura, Bechtel
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