ML20078E799
| ML20078E799 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 01/23/1995 |
| From: | Rehn D DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-89-10, NUDOCS 9502010142 | |
| Download: ML20078E799 (5) | |
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- DukeIbicerComparty -
D. L Ron.
i Catatcba Nudear Genemtion Department lice President '
4800ConcordRoad (803)W3205 office i
' York. 'iC29:45 (803)W3426 Fat
-1 DUKEPOWER
- January 23,1995 U. S. Nuclear Regulatory Commission A'ITN: Document Control Desk Washington, D. C. 20555
Subject:
Catawba Nuclear Station, Units 1 and 2 Dockets Nos. 50-413 and 50-414 Generic I2tter 89-10, " Safety-Related Motor-Operated Valve Testing and Surveillance", Group 1 Valve Closure Pursuant to the requirements of Generic Letter (GL) 89-10, item "m" and D.L. Rehn's letter to your staff, dated December 13, 1994, Duke Power Company (DPC) requests closure of Catawba's GL 89-10, Group 1 and low margin Group 2 valves for both Stage 1 and Stage 2 verifications. This request for closure does not include the remaining GL 89-10 Group 2 valves.
Total valves, for which closure is requested at Catawba, consists of 290 Group 1 and 6 Group 2 valves originally identified as low margin for a total of 296 valves. The Motor Operator Valve (MOV) design basis capability verification portion of the GL 89-10 program for these 1
valves was completed December 28,1994, as committed by DPC letter dated October 31,1991.
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' Stage 1 (calculations and ~ stat % testing) for these valves are complete, as well as the Stage 2 verifications. The distribution of methods used to complete the Stage 2 verifications are outlined in the Attachment.
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For valves that have not been differential-pressure (DP) tested, furtherjustification in the areas j
of rate of loading and friction coefficients are continuing to be reviewed with information, test techniques, and tools developed from the EPRI MOV Prediction Program.
We agreed, by DPC letter dated October 27,1994, to accelerate the schedule and commit to completing kil remaining Group 2 valves (currently 178 valves for both units) for Unit 1 by the end of refueling outage 1EOC9 (currently scheduled to end October 23,1996) and for Unit 2 by the end of refueling outage 2EOC8 (currently scheduled to end May 5,1997).
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U. S. Regulatory Commission l
January 23,1995 j
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If there are any further questions, please cortact Jeff Lowery at (803) 831-3414.
Very truly fours, y
D. L. Rehn, Site Vice-President Catawba Nuclear Station Attachment xc:
S. D. Ebneter, Regional Administrator, Region 11 R. E. Martin, ONRR R. J. Freudenberger, Senior Resident Inspector C. A. Casto, Engineering Branch, Region II i
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ATTACHMENT l
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s GROUP 1 STAGE 2 VERIFICATION l
300 m
250-200 150 113 100-N 50 -
42 O
TOTAL DP TESTED KEROTEST RSHER/
EPR VALVE GROUPING OTHER VALIDATION POSI-SEAL GROUPING WITH DP PROGRAM TESTING TESTED VALVES k
N closet.xis
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Attachment - Page 2 of 2 GROUP 1 STAGE 2 VERIFICATION METIIODS Consists of MOVs that were DP tested at 80% or DP Tested greater design basis conditions, where a static test demonstrates design basis conditions, and for some butterfly valves where a partial design basis DP and flow test and grouping was used.
Kerotest Validation Program Consists of Kerotest valves verified by grouping by the Duke Kerotest Validation Program.
Fisher /Posi-Seal Testing Consists of the group of Fisher /Posi-Seal valves verified by testing conducted by Duke Power and Kalsi Engineering.
EPRI Valve Grouping Consists of valves whose calculation has valve i
factors that bound the flow loop and in-situ test results used to validate the EPRI MOV Performance I
Prediction Program.
I Grouping with DP Tested Valves -
Consists of valves grouped with valves DP tested of similar design.
Other Consists of four Westinghouse 18 inch, 300 LB Class gate valves. Valves cannot be DP test in-situ and no similar valve DP test information is available.
The valves are containment sump isolation valves. The safety function is to open with 20 psid.
Review of the available Westinghouse information from Duke and EPRI
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testing indicate conservative margin is available to open the valves.
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