IR 05000280/1991010

Discusses Current Instrument Setpoint Program & Provides Overview of Ongoing Program Enhancements,Per Insp Repts 50-280/91-10 & 50-281/91-10

ML18153C706
Person / Time
Site:	Surry
Issue date:	08/20/1991
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
91-347, NUDOCS 9108260119
Download: ML18153C706 (3)

Text

e e VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 August 20, 1991 .. United States Nuclear Regulatory Commission Attention:

Document Control Desk Washington, D. C. 20555 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 INSTRUMENT SETPOINT PROGRAM Serial No. NO/ETS Docket Nos. License Nos.91-347 R4 50-280 50-281 DPR-32 DPR-37 Your letter of June 10, 1991, which documented Inspection Report 50-280/91-1 O and * 50-281/91-10, identified an instrument setpoint control issue and requested additional information on the overall instrument setpoiht control program. This letter provides a discussion of the current setpoint program and an overview of the ongoing program enhancement As noted in your inspection report and reaffirmed by our ongoing review, no specific safety significant discrepancies have been identified to date. A setpoint verification program was initiated for both stations in early -1989 with the * initial focus on safety-related instruments and instruments located in harsh environment Reactor Protection and Engineered Safety Features instrument setpoints used in the safety analysis have been verified with the exception of the final revision and documentation of the RCP undervoltage/under frequency relay setpoint We are actively working to obtain the additional design information necessary to complete the verification of these undervoltage/under frequency relay setpoint No significant safety discrepancies have been identified to date from this design basis document review and verificatio In early 1990, Units 1 and 2 Design Reference Procedures were developed to consolidate station* setpoints into one controlled series of documents for each unit. The information was compiled using the existing setpoint data from readily available station document These setpoints were not reverified nor were any missing tolerances, spans, and reset values generate In cases where a specific value (tolerances, spans, reset values, etc.) was missing from the Design Reference Procedures or calibration procedures, the value was obtained from controlled documents and/or the instrument loop calibration folders. If a specific value could not be provided from those documents, Engineering would then have been contacted for support. Guidance for use and control of setpoints has now been formalized in a station administrative procedur Additionally, the Units 1 and 2 Design Reference Procedures 005 for instrumentation have been compared to resolve differences in setpoints for corresponding instruments and provide documented references to justify differences that do exist (e, g,. level setpoint differences attributable to differences in 9108260119 910820 PDR ADOCK o~non?R0 ff * *--PDR. /{JD\ 1\.1 I.Xv '*

e the configuration of the reference leg on each unit): Any missing values for instruments (tolerances, reset values, spans, etc.) will be systematically included in the * Design Reference Procedure as individual instrument calibrations are* performe The remaining Units 1 and 2 Design Reference Procedures will also be compared based on the priority assigned by the Setpoint Control Program Action Plan discussed below. The Setpoint Control Program action plan has been developed to provide a systematic approach to enhancing the setpoint control program.*

The action plan will include identification of necessary support resources, criteria for selection of setpoints to be verified, compilation of reference documents, and training of appropriate personne To date, the setpoint control program coordinators and necessary support personnel have been identified at corporate and each station. The Attachment to this letter provides a summary of the action plan and the associated milestones for completing the setpoint control program enhancement Any setpoint deficiency identified during implementation of the program enhancement action plan will be evaluated in a timely manner. Upon completion of the evaluation, operability and reportability will be assessed, if applicable, and any necessary corrective actions initiate It is our intent to provide you periodic status of the setpoint verification effort and the setpoint control program enhancement If you have any questions, please contact us. Very truly yours, -1\ I r r1* _ I l\, I ' :_'\ --~\ \.._ \ **,,j_/_;\~

,*\ W. L. Stewart Senior Vice President-Nuclear Attachment cc: U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N. W. -Suite 2900 Atlanta, Georgia 30323 Mr. M. W. Branch NRC Senior Resident Inspector Surry Power Station *

• • * e ATTACHMENT SURRY POWER STATION INSTRUMENT SETPOINT CONTROL PROGRAM ENHAN_CEMENT ACTION PLAN * Setpoint Control Program Coordinators Appoint setpoint control program coordinator Completion date: Complete * * Setpoint Control Program Support Personnel Identify corporate and station personnel who will serve on the support team for this program. Completion date: Complete * Setpoint Document Conversion and Database Structure

_ Complete conversion of the setpoint documents for both stations to a controlled electronic database format accessible to corporate and station personne Completion date: -12/31 /92 * Setpoint Reference Information Compile available'

references which provide setpoint basis informatio Priority will be given to the protection systems setpoint Completion date: Note 1 * Procedural and Overall Programmatic Controls Review procedural and programmatic controls for controlling and implementing setpoint changes. Prepare interim controls as necessary to enhance the overall structure of the program. Completion date: 9/30/91 for necessary interim control Note 1 * Setpoint Design Basis Verification Develop and implement on a priority basis decision criteria for verification of_ setpoint basis informatio Completion date: Note 1 -* Training Ensure that nuclear personnel who are involved with setpoints are adequately trained. Completion date: Initial seminar training -11/15/91 Long term training needs identification-12/31/91 Additional long term training as needed -6/30/92 NOTE 1: Although work is proceeding on these activities, a detailed scoping assessment has not been complete We will provide periodic status of the setpoint control program enhancement I -