ML20058C223
| ML20058C223 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 10/24/1990 |
| From: | Vaughn G CAROLINA POWER & LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-1.D.2, TASK-TM GL-89-06, GL-89-6, NLS-90-170, NUDOCS 9011010064 | |
| Download: ML20058C223 (3) | |
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l Carolina Power & Light Company-l1 OCT 241990 seg13t: yts,90 17o United States Nuclear Regulatory Commission ATTENTION: Document Control Desk Washington, DC 20555 BRUNSWICK STEAM ELECTRIC PIANT, UNIT NOS.1 AND_2 DOCKET NOS. 50 325 & 50-324/ LICENSE NOS. DPR-71 & DPR 62 SUPPLEMENT TO GENERIC LETTER 89-06 SPDS CERTIFICATION Gentlemen:
On July 11, 1989 (NLS 89 202), Carolina Power & Light Company responded to Generic Letter 89 06, " Task Action Plan Item I.D 2 - Safety Parameter Display System (SPDS)," dated April 12, 1989. The submittal specified a number of enhancements to be made in order to bring the SPDS for Brunswick Unitsf1 and 2 into full compliance with the requirements of NUREG-0737, Supplement 1.
CP&L committed to complete 'the proposed modifications by December 31, 1990.
As-discussed below, completion of the SPDS enhancements'is currently-scheduled for September 30, 1991, 5
The enhancements committed to in the July 11, 1989 response to Generic Letter 89-06 were sub-divided into 30 tasks.
Twenty of the 30 tasks.are currently scheduled for completion by December 31, 1990 with the remaining work to be completed by September-30, 1991.
The items scheduled for completion in 1991 are associated primarily with the SPDS terminal replacement but also include enhancement of the data acquisition system and system documentation. Attachment 1 provides a more detailed breakdown of the expected completion schedule for each of the 30 tasks.
The major factors responsible for the extended completion schedule relate to improvement of SPDS terminal availability and reduction,of delays in response to user commands.
In an effort to resolve these discrepancies,.CP&L proceeded i
to examine the technical and regulatory-requirements associated with the man machine interface (MMI).
Several deficiencies in the performance of the MMI-and MMI terminal software were identified which prompted CP&L to solicit i
vendors to demonstrate software packages capable of duplicating the existing l
SPDS display fermat given real time _ data input.
Independent of the SPDS i
efforts a decision was made to replace the Process Computer at Brunswick.
With this knowledge, among the vendors contacted for the software demonstrations were those who were being-considered for the Process Computer replacement.
As a result of the identifiedLMMI and MMI terminal ~ software deficiencies and the success of the vendor demonstrations, it became evident that the optimum solution to the SPDS deficiencies is to replace the exisdng SPDS terminals with an MMI and MMI terminal software which is common-to thet
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of the new Process Computer.
This effort will improve both the terminal availability and the response time to user commands to within the guidelines of NUREG-1342.
In order to provide a common MMI for both the Process Computer and the SPDS, CP&L has elected to perform the SPDS terminal replacement in conjunction with the ongoing Process Computer Replacement Project. - Although the SPDS completion schedule was impacted by this decision, numerous advantages will _be og h
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Document Control Desk NLS 90 170 / Page 2 realized through the integration of these projects.
For example, it will help to avoid potential human factors engineering concerns in the Control Room by having a common MMI. Also, a co.umon MMI will allow use of the same graphics software package to assemble both the SPDS and the Process Computer displays.
i A common MMI and driving software will reduce the. complexity of the necessary operator training and maintenance associated with both the hardware and software.
Since the July 11, 1989 response to Generic Letter 89-06, CP&L has made-significant improvements to the SPDS. Recently, the Vax 11/785 central processing units (CPUs) were replaced with Vax 8600 CPUs resulting in improved computer performance.
The Suppression Pool Temperature Monitoring System availability has been enhanced-by the replacement of defective switches with upgraded models. Also, certain radiatirn monitoring and reactor power conditions-have been modified to reduce the number of false alarms generated.
CP&L has assigned a. full-time' engineering staff'to.the' completion of.the SPDS task. As problems are encountered through the ongoing Verification and Validation effort. they are thoroughly researched to ensure that the best solution will be implemented. Through the' efforts of the dedicated engineering staff, the overa11' functioning of the SPDS continues to improve.
These actions have enhanced the availability and reliability of the Brunswick SPDS which in turn has facilitated Operations Staff use of the SPDS.
The SPDS is in operation and is used by the operators. As a result of the ongoing efforts, the Brunswick SPDS has shown noticeable improvement and improvements are continually being made to the system.. The decision to i
complete the SPDS enhancement project with the Process Computer Replacement Project will cause a delay in overall completion of the SPDS modifications, however, the end result should be a better, more reliable SPDS.
Please refer any questions or concerns regarding the revised completion-schedule to Mr. M. R. Oates at (919) 546-6063.
Yours very truly, N
G. E. Vaughn l
Vice President Nuclear Services Department cc:
Mr. S. D. Ebneter Mr. N. B. Le i
Mr. R. L. Prevatte G. E. Vaughn, having been first duly sworn, did depose and say that the infor-mation contained herein is true and correct to the best'of his information, l
knowledge and belief; and the sources of his information are officers, l
employees, contractors, and agents of Carolina Power: & Light Company.
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... to SERIAL: NLS-90-170-Completion' Schedule for the 30' Tasks Associated SPDS Certification
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FSAR AND SAFETY ANALYSIS REPORT UPDATE.
Complete SPTMS DATA SELECTOR SWITCH UPCRADE Complete FORMATTER /DAS PERFORMANCE ENHANCEMENT Complete-PDS SECURITY PROBLEM RESOLUTION Complete SD-60 COMPLETION Complete' SYSTEM PERFORMANCE ENHANCEMENT Complete RADIATION MONITOR ALARM REDUCTION, Complete:
REACTOR POWER INACCURACY CORRECTION
-Complete VT100 TRAINING FOR OPERATIONS
-Complete SPTMS LINE NOISE REDUCTION Complete:
VERIFICATION OF +/- 2% TOLERANCE OF November 1990 SOME POINTS
. INSTALLATION OF FIBER OPTIC CABLES November 1990 FOR MAINTENANCE TERMINALS DATA BASE DISCREPANCY RESOLUTION November 1990 COMPLETION OF 5500 TEST PROCEDURE December 1990 4020/4030 DOCUMENT COMPLETION December 1990 ALCORITHM VERIFICATION / VALIDATION December 1990 MICROVAX/VAX DATALINK DATA TRANSFER December 1990 COMPLETE V&V ON DATABASE December 1990 OUTPUT POINTS VERIFICATION December 1990 VERIFICATION OF MUX CABINET INTERNAL December 1990-TEMPERATURE PLANT PROCEDURES UPDATE
'Dscember-1990 COMPLETION OF DATABASES Feb ruary - 1991 DOCUMENT SUPPORT MECHANISM February 1991 INSTALLATION OF CURRENT ECNs/FCNs
> April 1991' RESOLUTION OF UPS FAILURE PROBLEMS July 1991' INSTALL SYSTEM / PRINT QUEUE MANAGER September 1991~
TOSHIBA REPLACEMENT
' September 1991 5500 DOWNLOAD FROM SEPARATE CPUs September 1991 SPDS AVAILABILITY ENHANCEMENT September _1991 DAS EQUIPMENT UPCRADE September 1991 1/1
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