ML20046C672
| ML20046C672 | |
| Person / Time | |
|---|---|
| Site: | 05200002 |
| Issue date: | 07/23/1993 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Brinkman C ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY |
| References | |
| NUDOCS 9308110337 | |
| Download: ML20046C672 (3) | |
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NUCLEAR REGULATORY COMMISSION
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July 23,1993 V
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Docket No.52-002 Mr. C. B. Brinkman, Acting Director Nuclear Systems Licensing Combustion Engineering, Inc.
1000 Prospect Hill Road Windsor, Connecticut 06095-0500
Dear Mr. Brinkman:
SUBJECT:
STATUS OF THE REVIEW AND GENERAL ASSESSMENT OF THE NUPLEX 80+ DESIGN In your letter (LD 93-099) of June 24, 1993, you asked for the status of the Nuclear Regulatory Commission's (NRC) review and general assessment of the Nuplex 80+ advanced control complex design for System 80+.
Since the staff issued the draft safety evaluation ryort (DSER), the Nuplex 80+ instrumenta-tion and control (I&C) systems and advanced control room design features have undergone extensive review. The NRC's review of the Nuplex 80+ design and program development is in its final stages.
The staff is continuing its integrated, multi-disciplined review of Nuplex 80+.
The principal disciplines include I&C and human factors engi-neering. The majority of the product developed to date and the design process have been evaluated, based on staff review of a broad spectrum of issues as documented in CESSAR-DC, and supporting documents that provide detailed descriptions of the desip and design process.
Numerous public technical meetings and conferences between the NRC staff and ABB-CE personnel have been conducted to answer NRC questions and concerns.
This substantial effort by both parties has resulted in significant closure of control room design and I&C issues identified in the DSER and subsequent issues resulting from our continued review of Nuplex 80+.
The remaining issues are being resolved in a timely manner, consistent with the schedule outlined in SECY-93-097, " Integrated Review Schedules for the Evolutionary and Advanced Light-Water Reactor Projects."
Areas still under assessment and nearing completion include software develop-ment methodologies, human system interface, plant emergency procedure guide-lines, and human factors verification and validation. Ultimately, the staff will complete the review of System 80+ technical specifications for digitally based I&C systems and the associated I&C and control room related inspections, L
tests, analyses, and acceptance criteria.
j The staff believes that there are significant potential advantages of a qigitally-based control room as compared with the traditional analog-based I
tontrol room (characterized by all hardwired meters, recorders, alarms, and controls) for operator efficiency and operational safety. The expected reduction in operator workload, improved information management, and the increase in computer assistance to the operator'for mundane tasks, which can
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occupy much of the operator's time and attention, should be effective in f
improving overall plant safety.
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w Mr. C. B. Brinkman July 23, 1993 Although the control room design is only partially completed, key design features of Nuplex 80+ have been reviewed for appropriate human factors design principles. Standard design features offered in Nuplex 80+ were evaluated in the staff's audit of the Nuplex 80+ mockup at your facilities in Windsor, Connecticut. The design features evaluated include:
(1) the discrete indication and alarm system (DIAS) alarm tile display, (2) the DIAS dedicated parameter display, (3) the DIAS multiple parameter display, (4) the data processing system (DPS) display hierarchy, (5) the component control system (CCS) process controller display, and (6) the CCS switch configuration.
Additionally, the review included an evaluation of selected DIAS, DPS, and CCS display screen characteristics.
Characteristics of the integrated process status overview (IPS0) were also reviewed in relation to tasks performed at the reactor coolant system panel.
The staff concluded that IPS0 provides a concise, rapid, continuous, and convenient display of the safety parameter display system function in confor-mance with the requirements of Supplement I to NUREG-0737.
?n addition, the staff has evaluated the I&C architecture especially in relationship to ABB-CE's approach to I&C diversity through use of non-safety systems as defense against common-mode failures.
On the basis of our review to date, the staff believes that the final Nuplex 80+ design should be an improvement over the current generation of power-reactor control rooms. The final Nuplex 80+ design and construction will, of course, ultimately have to be verified and validated to ensure operational safety and conformance with the standards and regulatory require-ments specified in the System 80+ design certification.
Some issues remain to be resolved in the human factors and I&C areas; however, all of the remaining issues are approaching resolution and none should be an impediment to the licensing of the Nuplex 80+ design.
Sincerely, OrIctSi%M r,g;-
l Dennis M. Crutchfield, Associate Director for Advanced Reactors and License Renewal Office of Nuclear Reactor Regulation cc: See next page DJSTRIBUTION:
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0FFICIAL RECORD COPY:
NUPLEX.MXF
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ABB-Combustion Engineering, Inc.
Docket No.52-002 cc:
Mr. C. B. Brinkman, Manager Washington Nuclear Operations ABB-Combustion Engineering, Inc.
12300 Twinbrook Parkway, Suite 330 Rockville, Maryland 20852 Mr. Stan Ritterbusch Nuclear Licensing ABB-Combustion Engineering 1000 Prospect Hill Road Post Office Box 500 Windsor, Connecticut 06095-0500 Mr. Sterling Franks U.S. Department of Energy NE-42 Washington, D.C.
20585 Mr. Steve Goldberg Budget Examiner 725 17th Street, N.W.
Washington, D.C.
20503 Mr. Raymond Ng 1776 Eye Street, N.W.
Suite 300 Washington, D.C.
20006 Joseph R. Egan, Esquire Shaw, Pittman, Potts & Trowbridge 2300 N Street, N.W.
Washington, D.C.
20037-1128 Mr. Regis A. Matzie, Vice President Nuclear Systems Development ABB-Combustion Engineering, Inc.
1000 Prospect Mill Road Post Office Box 500 Windsor, Connecticut 06095-0500