ML20128D661
| ML20128D661 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 11/25/1992 |
| From: | Lo R Office of Nuclear Reactor Regulation |
| To: | Watson R CAROLINA POWER & LIGHT CO. |
| Shared Package | |
| ML20128D666 | List: |
| References | |
| TAC-M844686, TAC-M844687, NUDOCS 9212070345 | |
| Download: ML20128D661 (6) | |
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Docket Nos. 50-325 November 25, 1992 and 50-324 Mr. R.
- x. Watson Senior Vice President Nuclear Generation Carolina Power & light Company Post office Box 1551 Raleigh, North Carolina 27602
Dear Mr. Watson:
SUBJfCT:
REQUEST l0R ADDITIONAL INf0RMA110N RElAl[0 10 1HE PROPOSED STEAM IfAK DllEC110N IflSTRUMEllTAT10fl NUfMC UPGRADE - BRUNSWICK STEAM EllC1Ric PL ANT, UNilS 1 AND 2 (TAC NOS. M84686 AND M84687) on September 14, 1992, you submitted a proposed revision to the lechnical Sae(ifications (15) for the Brunswick Steam Electric Plant, Units 1 and 2.
11e staff has determined that several topics addressing hardware and software implementation have not been addressed adequately in this submittal; therefore, it is requested that you provide the additional information as listed in the enclosure.
Please provide a response and related documentation to these questions within 60 days.
If you have any questions, please contact me at (301) 504-1457.
ihe reporting and/or recordkeeping requirements contained in this letter affect fewer than nine respondents; therefore, OMB clearance is not required under P. L.96-511.
Sincerely, ORIGINAL SIGNED BY:
Ronnie 11. Lo, Senior Project Manager Project Directorate 11-1 9212070345 921125 Division of Reactor Projects - 1/11 2DR ADOCK 0500 4
Office of Nuclear Reactor Regulations
Enclosure:
As stated cc w/ enclosure:
See next page DIEll11M110N:
! Docket File R. Lo NRC/ Local PDRs E. Adensam PD 11-1 Reading S, Newberry S. Varga ACRS (10)
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g Carolina Power & Light Company Brunswick Steam Electric Plant Units 1 and 2 cc: Mr. R. B. Richey Mr. H. A. Cole Vice President Special Deputy Attorney General Brunswick Nuclear Project State of North Carolina Post Office Box 10429 Post Office Box 629 Southport, North Carolina 28461 Raleigh, North Carolina 27602 Mr. H. Ray Starling Manager - Legal Department Mr. Robert P. Gruber Carolina Power & Light Company Executive Director Post Office Box 1551 Public Staff - NCUC Raleigh, North Carolina 27602 Post Office Box 29520 Raleigh, North Carolina 27626-0520 Mr. Kelly Holden, Chairman Board of Commissioner. Mr. R. B. Starkey, Jr. Post Office Box 249 Vice President ^ Bolivia, North Carolina 28422 -Nuclear Services Department Carolina Power & Light Company Resident Ins"ectnr Post Office Box 1551 U. S. Nucita Regulatory Commission Raleigh, North Carolina 27602 Star Route 1, P.O. Box 208 Southport, North Carolina 28461 Mr. R. A. Watson Senior Vice President Regional Administrator, Region 11 Nuclear Generation U. S. Nuclear Regulatory Commission Carolina Power & Light Company 101 Marietta Street, Suite 2900 Post Office Box 1551 Atlanta, Georgia 30323 Raleigh, North Carolina 27602 Mr. Dayne H. Brown, Director Division of Radiation Protection N. C. Department of Environmental, Commerce and Natural Resources Post Office Box 27687 Raleigh, North Carolina 27611-7687 Mr. J. W. Spencer Plant General Manager Brunswick Steam Electric Plant Post Office Box 10429 Southport, North Carolina 28461 Public Service Commission State of South Carolina Post Office Drawer 11649 Columbia, South Carolina 29211 u
i ENCLOSURE REQUEST TOR ADDITIONAL INFORMATION RELATED TO THE PROPOSED STEAM LEAK i DETECTION INSTRUMENTATION NUMAC UPGRADE 1.0 General Backaround Information 1.1 Provide design information of the GE microprocessor based NUMAC
- system, include the descriptions of the devices used in the microprocessor, the programming language, compiler, type of microprocessor, etc.
1.2 Provide drawings and descriptions of the physical location of the replacement system in the plant. 1.3 Discuss the temperature and humidity qualifications of the NUMAC system and how these qualifications meet normal plant and worst-case accident conditions. - l 2.0 Sof tware Verification and Validation 2.1 Provide references / guidelines used for the NUMAC system. 2.2 Discuss any differences with IEEE 7.4.3.2. 2.3 Describe the plans for performing the-verification and validation (V&V) of the NUMAC system logic, i f the V&V has been performed, provide the documentation of the V&V plan, if the V&V has not been performed, describe the process by which CP&L will ensure the adequacy of the software used in the NUMAC system for IE applications. 2.4 Provide the acceptance criteria for hardware and software, and also discuss traceability of products at different development stages to their specifications, 2.5 Provide the acceptance criteria and procedures for, and results of ihe hardware / software integration testing, 2.6 Provide the procedures and results for the startup-testing. 2.7 Provide a listing of all softwara errors and their ensuing I corrections. 3.0 Ooerations/Suryf1] lances 3.1 Describe site acceptance / pre-operational testing; specifically address loss and restoration of power to the NUMAC system during standby and power. operation. Also describe the memory-retention capability of the-NUMAC system. 3.2 Discuss coordination of self 'Seck and continuous monitoring modes [ with normal NUMAC system operations. 3.3 Describe the steps required to recover the NUMAC system-if a loss of c y- - cm >av e - m m uy c y+- 3-- -ct-,-,w--wc-, , wr m : +-.a-- v , - ve~--3,ve,+re-*ar--- ,ww--eee w r - w w w m,-- m www-w-=w- '---w
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l 1 Y . 34 Describe all provisions for "back-up" provision to the NUMAC system. 3.0 Does the system provide alarms for the loss of the NUMAC system's self-diagnostic features? r 3.6 Discuss the potential failures for which the NUMAC system is not capable of detecting during channel functional testing. 3.7 Discuss the NUMAC system stability. 4.0 ELECTROMAGNETIC INTERFERENCE / RADIO FRE0VENCY INTERFERENCE (EMI/RFI) t 4.1 Provide the NUMAC electromagnetic compatibility (EMC) specifications and jus,*ify the margin between the EMC specifications and expected electromagnetic interference. 4.2 Discuss the process by 4hich CP&L will verify that the electromagnetic environment at the plant is enveloped by the NUMAC EMC test parameters: 4.2.1 Provide a list of the test equipment used in the onsite EMI/RFI testing and their technical specifications. 4.2.2 Provide the methodology and the results of the onsite electromagnetic interference survey. 4.2.3 Provide the evaluations of the vendor's EMI/RFI testing methodology and the results of the factory testing for radiated and conducted (e.g., power supplies) susceptibility. 4.4.4 Provide the results of th'e licensee's_ comparison between the onsite and factory EMI/RFI testing. 4.3 List the EMI/RFI testing frequencies and provide justifications for any frequencies not tested. 4.4 During the pre-operational test, are there any transient monitors installed? If any, what are the parameters being monitored? 4.5 Provide the surge transient susceptibility testing specifications for the NUMAC system and justify the margin between the specifications and expected surges. 5.0 Man-Machine Interface (MMI) 5.1 Discuss the MMI and how it interacts with the NUMAC system. 5.2 Discuss the process of altering setpoints through MMI or other means, i.e., password protection, administrative control', etc.
_.m I' 3-6.0 IE and Non-lE isolation 6.1 Provide a detailed description of the devices used to accomplish electrt:e1 isolation between the lE and non-lE systems and describe the spcrific testing performed to demonstrate that the devices are acceptable for this application. 6.2 Proutde data to verify that the maxieum credible faults applied during the tests discussed in the above question were the opy!!aum voltage / current to which the device cou'd be exposed, and explain how the maximum voltage / current was determined. 6.3 Verify that other faults were considered (i.e., open and short circuits) 6.4 Define the acceptance criteria for each type isolation device. 6.5 Provide the electrical wiring diagrams which show the non-lE connections to the NUMAC system. 7.0 Confiouration Control 7.1 Describe the process for future modification to the software and hardware of the NUMAC system. 8.0 [q39srcial Grade Item Dedication (1s the system beino orocured as a f atety-related system?) 8.1 Provide the procurement documentation for the NUMAC system. 8.2 Provide the mean-time-to-failure and the mean-time-to-repair information for the NUMAC system. 8.3 Describe the audit and audit results of the vendor's QA program and procedures for commercial grade dedication of the NUMAC system. S.4 What are the vendor's recommendation and bases for the shelf life of the NUMAC spare parts? 8.5 Provide the standards and procedures used to dedicate the GE commercial grade NUMAC system. 8.6 Describe the criteria that governed the successful completion of the GE V&V commercial grade dedication of the NUMAC system. 8.7 Identify the methods and acceptance criteria for verifying the critical characteristics. m 4 .r-v e q 7- ~ 9 g-yg- $-,.,.mm,m-en---g-- -mg. -r y -p.e-.-,, v> --,--i.r..s ---ae =
t 9.0 Desian basis consideration 9.1 Provide the assessm7nt and documentation on the development of the design modification with respect to the design basis of BSEP. l 10.0 Power Supply 1 10.1 Was the power sup)1y independently tested for the ability to withstand uvyr surges, spices or fluctuations? e 10.2 Provide the power requirements for the-NUMAC system. 10.3 Are switching power-supplies used, and if so, what provisions are made to control harmonic distortions in the NUMAC system? 11.0 Failure Mode 11.1 Discuss the failure mode of a loss of detector signal. 12.0 Fail Safe 12.1 Describe operation and design of any other NUMAC component used to - place the system in its fail safe condition. 13.0 Groundinu 13.1 Are the analog ..d digital grounds isolated? 13.2 During RFI testing, was the signal on the ground-line monitored? Discuss the effects of the signal measured en _the ground line in relation to RFI testing. 13.3 Discuss the effects of lightning strike on the ground line and provisions for system protection, 14.0 Setooint Calculations 14.1 Discuss the methodology of caiculating the_ analytical limit and-allowable limit for the differential flow of the reactor water cleanup -system isolation function. i r - .-------.m-..-m.,_..__.m.,,..,..._,....._.-_. .,,,y-c~_ -.,..m..m .r.,...,,.~. .4,.-,}}