ML20214U096

Forwards Request for Addl Info Re Verification & Validation of Facility Safety Monitoring Sys (Psms V & V)

ML20214U096
Person / Time
Site:	Beaver Valley
Issue date:	06/04/1987
From:	Tam P Office of Nuclear Reactor Regulation
To:	Carey J DUQUESNE LIGHT CO.
References
TAC-64577, NUDOCS 8706110046
Download: ML20214U096 (4)

Text

. '. June 4, 1987 Docket No. 50-412 Mr. J. J. Carey, Senior Vice President Duquesne Light Company Nuclear Group Post Office Box 4 Shippingport, Pennsylvania 15077

SUBJECT:

BEAVER VALLEY UNIT 2 - VERIFICATION AND VALIDATION OF PLANT SAFETY MONITORING SYSTEM (PSMS V AND V) (TAC #64577)

The PSMS V and V plan was addressed in our letter dated February 11, 1987 and your letter dated April 30, 1987. Furthennore, a license condition on this subject was imposed in the low-power license dated May 28, 1987.

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The enclosure describes the infonnation needed by us to complete this review.

. Please respond in accordance with the schedule stated in the low-power license.

The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.

Sincerely,

/s/

Peter S. Tam, Project Manager Project Directorate 7-4 Division of Reactor Projects I/II DISTRIBUTION

, Docket File NRC & Local PDRs PDI-4 Reading S. Varga B. Boger S. Norris P. Tam OGC-Bethesda E. Jordan J. Partlow ACRS(10)

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PDR ADOCK 05000412 A PDR l 1

Mr. J. J. Carey Duquesne Light Company Beaver Valley 2 Power Statior.

CC:

Gerald Charnoff, Esq. Mr. R. E. Martin, Manager Jay E. Silberg, Esq. Regulatory Affairs Shaw, Pittman, Potts & Trowbridge Duquesne Light Company 2300 N Street, N.W. Beaver Valley Two Project -

Washington, DC 20037 P. O. Box 328 Shippingport, Pennsylvania 15077 Mr. C. W. E4fng, Quality Assurance Pennsylvania Office of Consumer Manager Advocate Quality Asstrance Department ATTN: Michael Bardee Duquesne Light Company 1425 Strawberry Square P. O. Box 186 Harrisburg, Pennsylvania 17120 Shippingport, Pennsylvania 15077 John D. Burrows, P.E.

Director, Pennsylvania Emergency Director of Utilities Management Agency State of Ohio Room B-151 Public Utilities Comission Transportation & Safety Building 180 East Broad Street Harrisburg, Pennsylvania 17120 Columbus, Ohio 43266-0573 Mr. T. J. Lex Bureau of Radiation Protection '

Westinghouse Electric Corporation PA Department of Environmental Power Systems Resources P. O. Box 355 ATTN: R. Janati Pittsburgh, Pennsylvania 15230 P.O. Box 2063 Harrisburg, Pennsylvania 17120 Mr. P. RaySircar Stone & Webster Engineering Corporation BVPS-2 Records Management Supervisor P. O. Box 2325 Duquesne Light Company Boston, Massachusetts 02107 Post Office Box 4 Shippingport, Pennsylvania 15077 Mr. J. Beall U. S. NRC John A. Lee, Esq.

P. O. 181 Duquesne Light Company Shippingport, Pennsylvania 15077 1 0xford Centre 301 Grant Street Regional Administrator, Region I Pittsburgh, Pennsylvania 15279 U.S. Nuclear Regulatory Comission 631 Park Avenue King of Prussia, Pennsylvania 19406 l

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ENCLOSURE 1 f REQUEST FOR ADDITIONAL INFORMATION i

BEAVER VALLEY UNIT 2 VERIFICATION AND VALIDATION RELATING TO PSMS CLASS 1E SOFTWARE (SRPSECTION7.5)

The license (Duquesne Light Company) is using a Class IE computer-based digital display system (plant safety monitoring system (PSMS)) to display many of the RG 1.97 variables on plasma display modules in the control room. The staffhasbeenrequiringthataverificationandvalidation(Y8V)programbe performed on the development of all software used in Class IE systems.

By letter dated April 30, 1987 Duquesne Light Company stated that the PSMS is a Class IE design and is given the required degree of design review, factory testing and site testing to ensure that it meets its design function. No specific infomation was provided regarding a V8V plan for the PSMS Class IE software components. The BVPS-2 station control philosophy is that the operators will use the Main Control Board (MCB) indication as the primary source of control infomation. The licensee then identified the Category 1 and Category 2 RG 1.97 variables that are displayed on the PSMS.

Of the 9 Category 1 variables displayed on the PSMS all but two of the Category 1 variables have diverse instrumentation that is either independent or redundant from the PSMS and is available on the control room boards. One variable (neutron flux monitoring) has diverse indication that is available at a local cabinet. The second variable (core exit themocouple) can be detemined by an alternate method of measuring the voltage output of the thtmocouples at the terminals screw inputs to the PSMS cabinet.

The staff finds that the design review, the redundant MCB indicators and the procedures for alternate indication discussed by the licensee, provide adequate

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-2, assurance that sufficient accident monitoring instrumentation will be available to the operator over an interim period (approximately six sonths) of operation.

By November 29, 1987, the licensee shall submit a V&V plan which will be able to demonstrate the reliability of the PSMS software. The approved V&V plan must be implemented prior to startup following the first refueling outage.

This submittal schedule is consistent with that in the low-power license.

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