L-86-421, Forwards Response to 860919 Request for Addl Info Re Util 860515 Response to IE Bulletin 85-003.Differential Pressure Values Calculated by C-E as Part of C-E Owners Group Effort

Forwards Response to 860919 Request for Addl Info Re Util 860515 Response to IE Bulletin 85-003.Differential Pressure Values Calculated by C-E as Part of C-E Owners Group Effort

ML20213C823
Person / Time
Site:	Saint Lucie
Issue date:	10/31/1986
From:	Woody C FLORIDA POWER & LIGHT CO.
To:	Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-85-003, IEB-85-3, L-86-421, NUDOCS 8611100305
Download: ML20213C823 (3)

Text

f, P. o. Box 14000, JUNO BEACH, FL 33408 g e FLORIDA POWER & LIGHT COMPANY OCTOBER 31 1986' L-86-421 Dr. J. Nelson Croce Regional Administrator, Region 11 U. S. Nuclear Regulatory Commission 101 Marietta Street, N.W., Suite 2900 Atlanto, GA 30323

Dear Dr. Grace:

Re: St. Lucie Units I and 2 Docket Nos. 50-335, 50-389 IE Bulletin 85-03 Response to NRC Request for Additional Information By letter dated September 19, 1986, NRC transmitted a request for Additional Information (RAI) based on the FPL response to IE Bulletin 85-03 (L-86-204 dated May 15,1986). Attached, please find the response to your request.

Should you or your staff have any questions on this information, please contact us.

Very truly yours,

.d ,

C. O. W y

1. Group Vice President Nuclear Energy COW /GRM/gp Attachment cc: Harold F. Reis, Esquire Fe211100305 861031 FDR ADOCK 05000335 o PDR g[j j

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Re: St. Lucie Units I and 2' Docket Nos. 50-335 and 50-389 L-86-421 i.

ATTACHMENT QWSTION 1. How will the torque' switch settings be determined and who makes that determination?

RESPONSE

I The following process is being utilized by Florida Power & Light Company (FPL) to verify or re-calculate the motor operated valve.(MOV) torque switch setting associated with IE Bulletin 85-03. The maximum operating differential pressures l that were calculated in item A. of IE Bulletin 85-03 have been transmitted to the .

oppliccble valve vendors. Each valve vendor has been requested to provide the following information associated with volve:

, a. Stem thrust required for operation

b. Stem torque required for operation

c. Maximum allowable stem thrust

d. ~ Maximum allowable stem torque

! e. Recommended motor-operator control logic

f. Recommended torque bypass switch settings.

Once. this information is received, it will be transmitted to Limitorque

. Corporation. Limitorque will be requested to provide CPL with the original torque switch settings and revised torque switch settings (aoth normal and maximum) i based on the latest volve vendor torque and thrust information. Limitorque will l also be requested to provide recommendations for changes required to meet the l updated torque and thrust requirements, if necessary. These changes could consist of changes in motor size, gear ratios, and/or torque spring assemblies.

Note that a summary of the findings associated with this portion of IE Bulletin 85-03 will be included in the final wr!tten report.

QWSTION 2. How were the differential pressure (d/p) values determined?

RESPONSE

The differential pressure values included in the response to item A. of IE Bulletin 85-03 were calculated by Combustion Engineering (CE) as part of a CE Owners Group effort. CE Emergency Procedure Guidelines, capropriate Final Safety Analysis Report (FSAR) sections, and the latest St. Lucie Hant Units I and 2 plant drawings were all utilized by CE in determining the maximum operating differential pressure associated with each valve.

GRM4/015/2 l

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Attachment (con't)

QWSTION 3. How will the testing be accomplished?

RESPONSE

Our initial response stated that I&E Bulletin 85-03 testing would be occomplished using differential pressure (d/p) stroke testing or other available and approved techniques. Currently our intentions are to combine full d/p stroke testing with the application of signature analysis techniques to complete all testing required by the bulletin. In the event that full d/p stroke testing is found not to be practicable during our testing program, FPL will evoluote opproved alternatives at that time. Additionally, should alternative methods or equipment be developed and approved for use, FPL will consider their use in lieu of existing methods where a benefit con be shown.

QWSTION 4. What is the justification if full d/p testing is not performed?

RESPONSE

Currently, FPL is evoluoting volve testing configurations required for the volves identified in the FPL bulletin response. -If during this phase or the testing phase of testing is not practicable for o particular our MOV program, opplication, justificationwe forfind thatdfull d/p/p methods will be developed at. that time non-full Additionally, should a method of non-full d/p testing be developed and approved during our test program by other utilities or vendors, FPL will consider their opplication when deve!oped.

GRM4/015/3

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