ML18139A422

Forwards Reactor Coolant Pump Support Drawings & Description of Pump Support Disassembly & Insp Procedures,In Response to NRC 800707 Ltr

ML18139A422
Person / Time
Site:	Surry
Issue date:	07/07/1980
From:	Sylvia B VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Harold Denton, Varga S Office of Nuclear Reactor Regulation
Shared Package
ML18130A316	List: ML18130A315 ML18139A422 ML18139A423 ML18139A424
References
564, NUDOCS 8007110189
Download: ML18139A422 (2)

Text

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VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND,VIHGINIA 23261 July 7, 1980 Mr. Harold R. Denton, Director Serial Number 586 Office of Nuclear Reactor Regulation NO/HSM/sjl Attention: Mr. Steven A. Varga, Chief Docket Nos. 50-280 Operating Reactors Branch No. 1 50-281 Division of Licensing License Nos. DPR-32 U.S. Nuclear Regulatory Commission DPR-37 Washington, D. C. 20555

Dear Mr. Denton:

In our letter of March 19, 1980 concerning the disassembly and inspection of the reactor coolant pump supports, we stated that the. details of the inspec~

tion program would be provided to you for your review when the procedures were completed. Described herein are the disassembly and inspection procedures of the reactor coolant pump supports.

To assist in the description of the disassembly and inspection, we have attached drawings 11448-FM-53A, 53B, and 53C which are drawings of the reactor coolant pump supports. As stated in our letter of March 19, 1980, we intend to disassemble one leg assembly and fully inspect one of the mono-ball assemblies. The leg to be removed is shown as item 1 on drawing 11448-FM-53A and will be done in steam generator cubicle "C" only.

The steps to be followed in the disassembly are described below:

1. Install a temporary support frame under the reactor coolant pump.

2. Remove the two (2) upper diagonal supports (item 10, FM-53A).

3. Scribe match marks on each half of the clevis (items 1 and 2, FM-53C) of the monoball assembly so that the leg assembly may be reassembled to its original configuration.

4. Remove retaining rings and washers and drive out clevis pins (item 3, FM-53C) at each end of leg 1 and remove leg 1.

5. Remove the upper clevis half from ceiling support plate, the lower clevis half from the support leg, and prepare them for inspection by pressing out the monoball, sand blasting to remove the hersite coating ( the threads, pin bearing surfaces, and clevis bearing surfaces will be protected during sandblasting), and cleaning in acetone.

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6. The inspection will consist of a 100 percent visual inspection, s 100 percent ultrasonic inspection, and 100 percent liquid pene- J/'/O trant inspection of the clevis halves and pins.

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VIRGINIA ELECTRIC AND POWER COMPANY TO Mr. Harold R.

• Denton 2

7. The support leg will then be reassembled and recoated with a protec-tive coating.

If you require further information on this matter, we would be pleased to meet with your staff at their convenience.

Very truly yours, I ~

B. R. Sylvia Manager - Nuclear Operations and Maintenance HSM/sjl:D2 Attachment cc: Mr. James P. O'Reilly, Director Office of Inspection and Enforcement Region II