ML20071P034

Forwards RCS Pressure Isolation Valve Leakage Results Performed During First Refueling Outage,In Response to 820810 & 1223 Requests.Valve Disassembled & Inspected.Loose Corrosion Products May Have Prevented Closure

ML20071P034
Person / Time
Site:	Farley
Issue date:	06/03/1983
From:	Clayton F ALABAMA POWER CO.
To:	Varga S NRC
References
NUDOCS 8306070326
Download: ML20071P034 (4)

Text

Mailing h Alabama Power Company 600 North 18th Street

.A- Post Offico Box 2641 Birmin2 ham. Alabama 35291 Telephone 205 783-606i F. L Claykn, Jr.

Z%;"0;f,",*"' AlabamaPbwer the sotAhem electnc system June 3, 1983 Docket No. 50-364 Director of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Mr. S. A. Varga Joseph M. Farley Nuclear Plant - Unit 2 RCS Pressure Isolation Valve Leakage Results Gentlemen:

By letters dated August 10, 1982 and December 23, 1982, Alabama Power Company requested that Unit 2 Technical Specification 3.4.7.2 concerning isolation valve leakage be modified from 1 gpm to 1 to 5 gpm with certain restrictions. By Amendment No. 20 to the Unit 2 Facility Operating License, the NRC granted temporary relief to the leakage criteria. The NRC Staff requested the results of initial and final leakage tests performed during the first refueling outage. This ~

information, which has been provided informally, is hereby provided as an attachment to this letter.

If there are any questions, please contact us.

Yours very truly, M

. L. Clayton, .

FLCJr/RLG:lsh-D35 Attachment cc: Mr. R. A. Thomas Mr. G. F. Trowbridge Mr. J. P. O'Reilly Mr. E. A. Reeves Mr. W. H. Bradford Dr. I. L. Myers

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8306070326 B30603 PDR ADDCK 05000364 P PDr.

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l FNP-2 RCS PRESSURE' ISOLATION VALVE TEST RESULTS l 1st Refueling ist Refueling Valve Pre-0p All owable Leakage, .

Leakage, No. Description Leakage (GPM) Leakage *(GPM1 Shutdown (GPM) Startup (GPM)**

-Q2E11V001A 12" Gate 0.00 2.50 0.00 0.00 Q2E11V001B 12" Gate 0.00 2.50 0.00 0.00 Q2E11V016A 12: Gate 0.00 2.50 0.00 0.00 Q2E11V016B 12" Gate 0.00 2.50 0.00 0.00 Q2E11V021A 6" Check 0.00 2.50 0.00 0.00 Q2E11V021B 6" Check 0.00 2.50 0.00 0.00 Q2E11V021C 6" Check 0.00 2.50 0.00 0.00 Q2E11V042A 10" Check 0.00 2.50 0.00 0.00

-Q2E11V0428 10" Check 0.00 2.50 0.00 0.00 Q2E11V051A 6" Check 0.00 2.50 Failed # 0.29 Q2E11V051B 6" Check 0.00 2.50 0.00 0.15 Q2E11V051C 6" Check 0.00 2.50 0.00 0.37 Q2E21V032A 12" Check 0.00 2.50 0.00 0.00 Q2E21V032B 12" Check 0.00 2.50 0.00. 0.00 Q2E21V032C- 12" Check 0.00 2.50 0.00 0.00 Q2E21V037A 12" Check 0.00 2.50 0.00 0.00 Q2E21V037B 12" Check 0.00 2.50 0.00 0.00-Q2E21V037C 12" Check 0.00 2.50 0.00 0.00

! Q2E21V062A 2" Check 0.00 0.25 Q2E21V062B 2" Check 0.303 1.65 0.24 0.25 Q2E21V062C- 2"Checky 0.24 0.25 Q2E21V066A 2" Check 0.00 1.50 0.28 1.00 Q2E21V066B 2" Check 0.32 1.66 0.32 1.00 Q2E21V066C -2" Check: 0.91 1.96 0.29 1.00

_Q2E21V076A .6" Check 0.00 2.50 0.00 0.00 l-

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FNP-2 RCS PRESSURE ISOLATION VALVE TEST RESULTS 1st Refuelir.g ist Refueling Valve Pre-0p All owable Leakage, Leakage, No. Description Leakage (GPM) Leakage *(GPM) Shutdown (GPM) Startup (GPH)**

Q2E21V076B' 6" Check 0.00 2.50 0.00 0.00 Q2E21V077A- 6" Check 0.00 2.50 0.37 0.15 Q2E21V0778 6" Check 0.00 2.50 0.30 0.15 Q2E21V077C 6" Check 0.00 2.50 0.00 0.55 Q2E21V078A 2" Check 0.00 1.50 0.00 1.00 Q2E21V0788 2" Check 0.45 1.72 0.00 1.00 Q2E21V078C 2" Check 0.69 1.84 0.00 1.00 Q2E21V079A 2" Check 0.00 1.50 0.00 0.60 Q2E21V079B 2" Check 0.45 1.72 0.00 0.90 Q2E21V079C 2" Check 0.76 1.88 0.00 0.15 w Allowable leakage based on 10-11-82 Technical Specification change request.

.# The leakage rate was not measurable due to apparent failure of the valve to seat.

• • Official 1st refueling outage test results based on Technical Specification requirements.

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s ADDITIONAL DATA ON FNP-2 VALVE Q2E11V051A Manufacturer: Velan  ;

Design: 6",1500#, Forged, Bolted Cover, Swing Check ~

Class: ASME Class 1 Valve Identification #: 6C88 Valve was disassembled and inspected during weekend of October 30-31. A definite cause of failure to seat properly was not found. It is speculated that loose corrosion products may have prevented valve i-closure at the reduced pressure used for testing. The valve was lapped ,

, as a precaution and reinstalled. The valve successfully passed the official leakage test performed during startup.

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