ML20005A022

Forwards Results of Auxiliary Feedwater Pump 48-h Endurance Test in Response to 810508 Request

ML20005A022
Person / Time
Site:	Calvert Cliffs
Issue date:	06/23/1981
From:	Ash R BALTIMORE GAS & ELECTRIC CO.
To:	Clark R Office of Nuclear Reactor Regulation
References
NUDOCS 8106290256
Download: ML20005A022 (10)

Text

. _-_

o.

N SALTIMORE l GAS AND

! ELECTRIC CHARLES CENTER. P.O. BOX 1475 BALTIMORE, MARYLAND 21203 June 23, 1981 ELECTRIC ENGINEERING DEPARTMENT odi ! @ff Office of Nuclear Reactor Regulation g

y op U. S. Nuclear Regulatory Commission e

s 32 Washington, D. C.

20555 g

Attn:

Mr. Pobert A. Clark, Chief

[

/

Operating 11eactors Branch #3 g

Division of Licensing 4

4

Subject:

Calvert Cliffs Nuclear Power Plant Units Nos. 1 & 2, Dockets Nos. 50-317 & 50-318 Auxiliary Fee _dvater Pumn Endurance Tests

References:

a) Ltr frem Eisenhut to Lundvall, NRC Requirements for Auxiliary Feedvater Systems at CCNPP 1 & 2, dated 11/7/79 b) Ltr from Clark to Lundvall, Issuance of Amendments Nos. % & 37 to Facility Operating License, dated 5/8/81.

c) Ltr from Lundvall to Clark, HRC Recuirements for Auxiliary Feedvater System, dated 3/9/81.

Gentlemen:

Additional Short Term Rece==endation 2 of reference (a) cequired that a 72-hour endurance test be performed for each Auxiliary Feedvater ( AFW) pu: p.

Reference (b) pointed out that this was chantted to a 48-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 AF'J pump no.11.

Reference (c) was our comnitment to test IJV pumps nos.

12, 21, and 22.

This letter forvards the results of these tests as required by reference (b). It should be noted that upon installation of the third train punns, a similar test vill be performed and the results forwarded to the.

NRC.

The results are summari::ed as follows:

(1) Enclosure (1) is a flow schematic of the test. The AFW pump vas run at 2000 RPM, taking suction from the conj.ensate storas*e tank and returning the v' via the recirculation line. A strobotach was used to - -

y pump speed. A vibropac was used to measure pump vibration.

devpoint meter was used to deternine 8.106290 M P00R BRGINAL e

w

.s Mr. R. A. Clark Page 2 June 23, 1981 AFW pump room environmental conditions. The remainder of the instrtmentation was normally installed plant monitoring equipment as shown in the flow schematic.

(2) The pump flow, head, and speed was ecmpared to curves supplied by the vendor with satisfactory results. The head did not vary by more than +3 to 5 percent of the pu=p curves.

(3) Plots of bearing temperature vs time for the pump and turbine are included in Enclosure 2.

Turbine bearing oil temperature should not exceed 2100F. Pump bearing temperature should not 0

exceed 175 F.

As can be seen from Enclosure 2, these limits were maintained.

(h) Enclosure 2 also contain,s plots of ambient temperature and humidity. All equipment in the room was designed for a design te=perature of 125 F.

The highest temperature reached was 980F.

We have no limits on humidity, but the max attained was only 665.

Therefore, for these tests, the pump room ambient temperature did not exceed environmental qualification limits for safety-related equipment in the room.

(5) The pu=7 vibration did not exceed allovable limits during the h8-hour endurance test.

Should you have any questions, feel free to contact us.

Very +

y yours, R. F. Ash Chief Nuclear Engineer RFA/JCH/ san ec:

J. A. Biddison, Esquire G. F. Trowbridge, Esquire Messrs. E. L. Conner,.Tr.

JRC R. E. Architzel - ?TRC J. C. Ventura - Bechtel

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