ML20058F350
| ML20058F350 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 12/01/1993 |
| From: | Wrigth G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Schnell D UNION ELECTRIC CO. |
| References | |
| GL-89-10, NUDOCS 9312080076 | |
| Download: ML20058F350 (5) | |
Text
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uNIVED STATES
[O Io NUCLEAR REGULATORY COMM!SSICN g
o REGION itt 2
3 799 ROOSEVELT HOAD
'8 GLEN ELLYN, ILUNOIS 60137-5927
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DEC i 1993 Docket No. 50-483 Union Electric Company ATTN:
Mr. Donald F. Schnell Senior Vice President -
Nuclear Post Office Box 149-Mail Code 400 St. Louis, MO 63166
Dear Mr. Schnell:
SUBJECT:
'GCUMENTATION REQUEST TO SUPPORT THE CALLAWAY NUCLEAR POWER PLANT u
MOTOR OPERATED VALVE INSPECTION I would like to inform you that we intend to perform a Generic Letter (GL) i 89-10 motor operated valve (MOV) inspection at your Callaway Nuclear Power Plant on January 10-14 and 24-28, 1994. This will be a Phase 2 inspection in i
accordance with Temporary Instruction 2515/109.
The inspection's main focus will be your GL 89-10 program implementation.
Specifically, we will review your evaluation of differential pressure test results and the use of available i
data to justify assumptions and update your program.
We will also review issues raised during the Phase 1 inspection (NRC Inspection Report No.
50-483/91020(DRS)).
The attachment to this letter lists information normally utilized during the inspection.
To facilitate the inspection, I request your assistance in having this information available at the beginning of the inspection.
We have found that a short MOV program implementation status summary is an effective way to supplement the documentation and enhance information exchange.
If you desire to make such a presentation, we suggest it be held immediate following the entrance meeting. However, we request that the presentation be no longer than two hours in duration.
If you have any questions regarding the attachment, or the inspection itself, please contact me (708) 790-5695 or John Jacobson of my staff (708) 790-5276.
Sincerely, 0700: 2 ked'
/ G. C. Wright, Chief Engineering Branch
Attachment:
As stated See Attached Distribution 9312080076 931201 I
PDR ADOCK 05000483 i
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Union Electric Company 2
DEC 3 1933-L Distribution cc w/ attachment:
G. L. Randolph, Vice President, Nuclear Operations.
J J. V. Laux, Manager, Quality
-l Assurance
- 5. E. Sampson, Supervising Engineer, Site Licensing OC/LFDCB
. Licensing Project Manager, NRR Resident Inspector, RIII Region IV Resident Inspector, Wolf Creek K. Drey C. John Renken, Engineer, l
Policy & Federal Dept.
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l Gerald Charnoff, Esq.
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R. A. Kucera, Deputy Director, I
Department of Natural Resources l
Dr. J. O. Cermac -
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Chairman, Illinois Commerce Commission i
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ATTACHMENT GENERIC LETTER 89-10 INSPECTION DOCUMENTATION RE0 VEST The following is representative of material used during a Phase 2 MOV inspection.
It will-significantly aid in inspection efficiency if the information is available at the beginning of the inspection.
1.
Your current GL 89-10 program description, including position papers or other documents, that are used to support your program.
2.
The valve number and noun-name for each valve in your program.
3.
A complete set of " Target Margin Calculations" for each MOV in your program, or other documents that contain the equivalent information, including:
a.
Motor: ac or dc, nominal voltage rating, nominal torque, speed.
b.
Actuator: manufacturer, type, size overall gear ratio, application factor, assumed efficiencies.
c.
Valve: Manufacturer, type, pressure rating, disc area used in calculations, stem diameter, assumed valve factor, assumed stem friction coefficient, pitch and lead, d.
Design Basis Conditions: differential pressure, system pressure, worst case motor voltage, fluid temperature and flow conditions, and ambient accident temperature conditions.
4.
Information on valves that have been tested and the type of test performed (static or dynamic design basis test). The following information is of specific interest:
valve factor observed for each valve which was differential ~ pressure (dp) tested, test dp,- stem friction coefficients observed during static and design basis testing, percentage of load sensitive behavior observed during the dp test, and thrust observed at torque switch trip under static and dp conditions.
5.
Procedures for:
a.
Calculating differential pressure (dp) requirements-b.
Determining torque switch settings c.
Preventive and corrective maintenance on MOVs, including post maintenance testing requirements d.
Performing dp and static testing e.
Evaluating MOV test results t
C.
Attachment - Generic Letter 89-10 2
l Inspection-Documentation Request f.
Performing degraded voltage calculations
-l g.
Trending MOV parameters and failures 6.
The status of your actions in response to items identified in GL 89-10
-j inspection report 50-483/91020(DRS).
7.
The schedule for testing and maintenance of MOVs during the period of the inspection.
8.
MOVs in safety-related systems which were not included in the GL 89-10 program and the reason for not-including them.
9.
Specific justification for not performing design basis testing on MOVs included in the program.
10.
An organizational chart for the NOV staff and the appropriate phone numbers.
11.
P&lDs for systems which include GL 89-10 MOVs.
12.
A schedule of expected testing and completion projections for GL 89 commitments.
13.
Results of degraded voltage studies.
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Results of MOV sizing and switch setting calculations, if different than 3, above.
15.
Results of differential-pressure. calculations.
16.
Evaluations and corrective action, if appropriate, to address various information notices pertaining to pressure locking and thermal binding of M0Vs.
l 17.
Diagnostic equipment manufacturer, devices used, assumed accuracies,.and the associated vendor manuals.
j 18.
Information on MOV failures since January 1,1990.
19.
The latest self-assessment performed to address your MOV program.
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20.
.Information on completed and proposed modifications to enhance MOV capability.
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Attachment - Generic Letter 89-10 3
j Inspection-Documentation Request
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21.
The following areas will also be addressed during the-inspection:
i a.
Justification for generic assumptions for valve factors, stem friction coefficients under degraded and non-degraded conditions, l
and load sensitive behavior.
b.
Test information feedback into your GL 89-10 program.
Specifically, steps taken to update programmatic values for valve factors, stem friction coefficients, and load sensitive behavior i
based on the results of your testing program.
c.
Assessment of ambient' temperature effects on MOV motors, including actions taken (and planned) in response to the recent Limitorque Part 21 Notice, " Torque at Elevated Temperatures,". dated May 13, 1993.
i d.
Actions planned to justify design basis capability for MOVs which will not be subjected to dp testing.
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e.
Justification demonstrating that static testing (performed to
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comply with the periodic verification recommendations) is sufficient to demonstrate that MOVs can perform their design basis functions, if applicable.
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