ML20029D739
| ML20029D739 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 05/02/1994 |
| From: | Wright G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Murphy W COMMONWEALTH EDISON CO. |
| References | |
| GL-89-10, NUDOCS 9405100012 | |
| Download: ML20029D739 (5) | |
Text
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l May 2, 1994 l
Docket No. 50-373 Docket No. 50-374 l
Commonwealth Edison Company i
ATTN: Mr. W. Murphr Site Vice P esident LaSalle Nuclear I'ower Station l
2601 North Olst Road Marseilles, IL 61341 l
Dear Mr. Murphy:
SUBJECT:
DOCUMENTATION REQUEST TO SUPPORT THE LASALLE STATION MOTOR OPERATED VALVE INSPECTION I would like to inform you that we intend to perform a Generic Letter (GL) 89-10 motor operated valve (M0V) inspection at the LaSalle Station on June 13 through 17 and June 27 through July 1,1994. This will be a Phase 2 inspection in 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 data to justify assumptions and update your program.
We will also review issues raised during the Phase 1 inspection (NRC Inspection Reports No. 50-373/92023(DRS); 50-374/92023(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 immediately following the entrance meeting. However, we request that the i
presentation be no longer than one hour in duration.
l If you have any questions regarding the attachment, or the inspection itself, please contact me (708) 829-9731 or John Jacobson of my staff (708) 829-9736.
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Sincerely, ORIGINAL SICED BY GCOHTO' C. TRICK!
9405100012 940502 PDR ADOCK 05000373 G
PDR G. C. Wright, Chief Engineering Branch
Attachment:
As stated See Attached Distribution RIIIb(
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1 Commonwealth Edison Company 2
May 2, 1994 Distribution s
cc w/ attachment:
L. O. DelGeorge, Vice President Nuclear Oversight and Regulatory Services D. J. Ray, Station Manager 4
J. Lockwood, Regulatory Assurance Supervisor D. Farrar, Nuclear Regulatory Service's Manager 4
0C/LFDCB Resident Inspectors, LaSalle Dresden, Quad Cities Richard Hubbard Nathan Schloss, Economist, Public Utilities Division 1.icensing Project Manager, NRR State Liaison Officer Chairman, Illinois Commerce Commission W. L. Axelson, RIII bcc w/ attachment:
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ATTACHMENT GENERIC LETTER 89-i0 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.
iour current GL 89-10 program description, including position papers or other program support documents.
2.
The valve number and noun-name for each valve in your program.
3.
" 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 (dp), 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 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 dp requirements b.
Determining torque switch settings c.
Preventive and corrective maintenance on HOVs, including post maintenance testing requirements d.
Performing dp and static testing e.
Evaluating MOV test results r.
Performing degraded voltage calculations
i Attachment - Generic Letter 89-10 2
Inspection-Documentation Request I
g.
Trending M0V parameters and failures 6.
The schedule for testing and maintenance of MOVs during the period of the' inspection.
l 7.
MOVs in safety-related systems which were not included in the GL 89-10 l
program and the reason for not including them.
8.
Specific justification for not performing design basis testing on MOVs included in the program.
9.
An MOV staff organizational chart and appropriate phone numbers.
10.
P& ids for systems which include GL 89-10 MOVs.
11.
A schedule of expected testing and completion projections for GL 89-10 commitments.
i 12.
Results of degraded voltage studies.
13.
Results of M0V sizing and switch setting calculations, if different than 3, above.
14.
Results of dp calculations.
15.
Evaluations and corrective action, if appropriate, to address various information notices pertaining to pressure locking and thermal binding of M0Vs.
16.
Diagnostic equipment manufacturer, devices used, assumed accuracies, and the associated vendor manuals.
17.
Information on MOV failures since January 1,1991.
18.
The latest MOV program self-assessment.
19.
Information on completed and proposed modifications to enhance M0V capability.
20.
The following areas will also be addressed during the inspection:
a.
Justification for generic assumptions for valve factors, stem friction coefficients under degraded and non-degraded conditions, 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 based on the results of your testing program.
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j Attachment - Generic letter 89-10 3
Inspection-Documentation Request c.
Assessment of ambient temperature effects on M0V motors, including actions taken (and planned) in response to the recent Limitorque Part 21 Notice, " Torque at Elevated Temperatures," dated May 13, 1993.
d.
Actions planned to justify design basis capability for MOVs which will not be subjected to dp testing.
1 e.
Justification demonstrating that static testing (performed to comply with the periodic verification recommendations) is sufficient to demonstrate that MOVs can perform their design basis functions, if applicable.
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