ML19209A771

Responds to IE Bulletin 79-15, Deep Draft Pump Deficiencies. Two Bingham-Willamette Model 30 by 44C-VTM Vertical Turbine Deep Draft Pumps Utilized in safety-related Applications in Each Facility.Pumps Not Yet Operational

ML19209A771
Person / Time
Site:	Catawba
Issue date:	09/07/1979
From:	Parker W DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
NUDOCS 7910050357
Download: ML19209A771 (3)

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Director, Division of Reactor Construction Inspection -

United States Nuclear Regulatory Comission Office of Inspection and Enforcement Washington, DC 20555

Subject:

Catawba Nuclear Station Docket Nos.40-413 and 50-414 IE Bulletin 79-15

Dear Sirs:

Enclosed is Duke Power's ' esponse to IE Bulletin 79-15 for the Catawba Nuclear Station.

Ver truly yours, f ,

w .a U . ex L.

William 0. Parker, Jr.

ROS/sch Enclosure cc: Mr. J. P. O'Reilly, Director U.S. Nuclear Regulatory Commission 101 Marietta Street, Suite 3100 Atlanta, GA 30303 4 O* ypROGng,%g C  % <

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CATAWBA NUCl. EAR STATION

, Docket Nos. 50-413 & 50-414 Duke Power's Response to USNRC IE Bul M 'y 79-15 IE Bulletin 79-15 requested six items of information from all holders of Construction Permits. Duke's responses are as follow:

~(1) The number of deep draft pumps utilized in safety related applications in each facility.

There are four such pumps--two per unit--all of which are vertical turbine pumps similar in configuration to those shown in Figure 1 of the referenced Bulletin.

(2) Manufacturer, model, capacity and plant application.

These pumps were manufactured by Bingham-Willamette, model number 30 x 44C-VTM. Each pump has a capacity of 20,900 GPM at 174' TDH and will be utilized as a Nuclear Service Water Pump.

(3) Overall Dimensions.

The overall dimensions are 5' x 62'; the pump is 5' x 52' and the motor is 5' x 10'.

(4) Summary of startup, testing and routine maintenance history.

These pumps have been installed in accordance with approved procedures under supervision of Bingham Field Service personnel.

During September 1979, the pumps will be used to flush the Nuclear Service Water System. Subsequent to this, the pumps will be used to flush numerous other systems during plant construction. A detailed maintenance and operation log will be maintained during this period.

(5) Operational problems and major repair efforts.

These pumps are not yet operatinad, therefore this information cannot be provided.

(6) The longest interval that each pump has been available without corrective maintenance.

These pumps are not yet operational, therefore this information cannot be provided. .

1126 2'/0

2 The following three items provide relevant, supplementary information concerning design and testing performed to improve the reliability of these pumps:

, i (1) A witnessed performance test was conducted on each pump at Bingham's test facility prior to shipment. The results of the test, including vibrations, were in accordance with the require-ments of the design specification and Hydraulic Institute Standards.

(2) Supports between the pump and structure walls, which are seismically designed to assure rigid response of the pump assembly, restrain pump column and discharge head movement in two horizontal orthogonal directions.

(3) Droblems that might occur in the pump shaft and bushings have been avoided by isolating these components from the lake water with an enclosing tube within the pump column. A separate clean source of bearing flush and cooling water is introduced into the tube it the e

pump stuffing box. This water exhausts at the pump's suction.

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