ML20057C121
| ML20057C121 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 09/17/1993 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-89-10, ULNRC-2860, NUDOCS 9309270096 | |
| Download: ML20057C121 (5) | |
Text
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1 1llG1 ChritjT(:ity Astnye Post Orf:w Cu 1G l
St Lou? Mr;owiC1lV 3!4 M4 ?tBO Union Etsc71oc itc"'"" "" *"'
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September 17, 1993 U.S. Nuclear Regulatory Commission ATTN:
Document Control Desk Mail Stop P1-137 Washington, D.C.
20555 Gentlemen:
ULNRC-2860 DOCKET NUMBER 50-483 CALLAWAY PLANT SAFETY-RELATED MOTOR-OPERATED VALVE TESTING AND SURVEILLANCE
Reference:
NRC Generic Letter No. 89-10, Supplement 5 dated June 28, 1993 The attachment to this letter provides Union Electric's response to Generic Letter 89-10, Supplement 5.
If you have any questions regarding this information, please contact'me.
Very truly yours, Donald F.
Schnell WEK/kea Attachment 9309270096 930917 PDR ADDCK 05000483~
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i Donald F.
Schnell, of lawful age, being first duly, sworn upon oath says that he is Senior Vice President-Nuclear and an officer of Union Electric Company; that he has read the foregoing. document and knows the content thereof; that he has executed the same for and on behalf of said company with full power and authority to do so; and
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that the facts therein stated are true and correct to the best of his-knowledge, information and belief.
O By Donald F. 'Schnell Senior Vice President Nuclear SUBSCJtIBED and sworn to before me this
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1993.
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BARBARA L PFAFE NOTARY PUBLIC-STATE OF MISSOURI MY COMMISSION [XPIRES APRIL 22,1997 ST. LOUIS COUNTY I
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T.
A.
Baxter, Esq.
Shaw, Pittman, Potts & Trowbridge 2300 N.
- Street, N.W.
Washington, D.C.
20037 M. H.
Fletcher CFA, Inc.
18225-A Flower Hill Way i
Gaithersburg, MD 20879-5334 L. Robert Greger Chief, Reactor Project Branch 1 U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 i
Bruce Bartlett Callaway Resident Office U.S.. Regulatory Commission RR#1 i
Steedman, Missouri 65077 L. R. Wharton (2)
Office of Nuclear Reactor Regulation U.S.
Nuclear Regulatory Commission 1 White Flint, North, Mail Stop 13E21 11555-Rockville Pike Rockville, MD 20852 Manager, Electric Department Missouri Public Service Commission P.O.
Box 360 Jefferson City, MO 65102 1
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UNION ELECTRIC RESPONSE TO NRC GENERIC LETTER 89-10, SUPPLEMENT 5
" INACCURACY OF MOTOR-OPERATED VALVE DIAGNOSTIC EQUIPMENT" Reporting Reauirement 1:
DIAGNOSTIC EQUIPMENT USED Within 90 days of receipt of this generic letter, all licensees are required to notify the NRC staff of the diagnostic equipment used to confirm the proper size, or to establish settings, for I
MOVs within the scope of GL 89-10.
Union Electric Response Callaway uses ITI-MOVATS equipment to confirm the proper size and establish settings for MOVs within the scope of GL 89-10.
Reporting Recuirement 2:
ACTIONS TO ADDRESS MOV DIAGNOSTIC ACCURACY CONCERNS Within 90 days of receipt of this generic letter, licensees are required to report whether they have taken actions or plan to take actions (including schedule and summary of actions taken or planned) to address the information on the accuracy of MOV diagnostic equipment.
Union Electric Response Union Electric evaluated diagnostic equipment inaccuracy when reviewing NRC Information Notice 92-23, "Results of Validation Testing of Motor-Operated Valve Diagnostic Equipment."
The actions taken to respond to Notice 92-23, early 1
in 1992, are applicable to Generic Letter 89-10, Supplement 5 and are listed below:
Callaway's MOV testing policy was changed.
Callaway now measures closing thrust directly whenever possible.
Page 1 of 2
a.
All previously MOVATS tested MOVs were re-evaluated using the bounding criteria established in MOVATS Engineering Report 5.2.
The intent of this evaluation was to identify MOVs that would be included in the Spring 1992 refueling outage.
Based on the evaluation, 12 MOVs were added to the test schedule for the Spring 1992 refueling outage and 36 MOV tests were augmented by the performance of direct thrust measurements during the Spring refueling outage due to the testing policy change.
i STATUS OF ACTIONS TO DATE Union Electric evaluated diagnostic equipment inaccuracy as required by NRC Generic Letter 84-10, Supplement 5.
The concerns of this document have or will be addressed as described below:
Generic Letter 89-10, Supplement 5 was evaluated and found to be applicable to 109 MOVs at Callaway.
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89 MOVs have been tested using direct thrust measurement, 85 with the MOVATS Torque Thrust Cell '(TTC) and 4 with Stem Strain-Rings.
9 MOVs are scheduled for initial direct close thrust measurement using a TTC during the Fall 1993 refuel outage.
3 additional MOVs are scheduled for initial i
direct close thrust measurement using a TTC before the end of 1993.
The remaining 8 applicable MOVs have either been full flow DP tested or do not have a safety function to close.
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