ML20024J512
| ML20024J512 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 10/13/1994 |
| From: | Jabbour K Office of Nuclear Reactor Regulation |
| To: | Berkow H Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9410180373 | |
| Download: ML20024J512 (14) | |
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UNITED STATES 3
j NUCLEAR REGULATORY COMMISSION
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WASHINGTON, D.C. 20066-O'XH L
f October 13, 1994 in 1
a MEMORANDUM TO:
Herbert N. Berkow, Director Project Directorate II-3 Division of Reactor Projects - I/II i
Matthew Chiramel, Acting Chief Instrumentation and Controls Branch Division of Reactor Controls and Human Factors FRON:
Kahtan N. Jabbour, Senior Project Manager Project Directorate II-3 Division of Reactor Projects - I/II
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SUBJECT:
SUMMARY
OF SEPTEMBER 13, 1994, MEETING WITH GENERAL 4
ELECTRIC COMPANY REGARDING POWER RANGE NEUTRON MONITOR WIIH %
STABILITY EDWIN I. HATCH NUCLEAR PLANT, UNIT 1 P
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On September 13, 1994, the NRC staff met with the representatives of General' M Electric Company (GE) in Rockville, Maryland.- The purpose of the meeting was to discuss the review plans for generic and plant-specific licensing activities related to the replacement of the analog power range monitoring i
equipment with a GE NUMAC digital power range neutron monitor (PRNM) and associated reactor power stability software. The attendees are listed in Attachment 1., the meeting agenda and the viewgraphs used for the GE presentation are included as Attachment 2.
After brief introductory remarks, Mr. D. Reigel, GE, discussed the scope of the project including its generic and plant-specific aspects. He stated that, at the plant level, the project is limited to the current PRNM panel, the plant computer interface, and the operator interface.
In a plant such as Hatch, the existing power range monitor hardware is a 5-bay panel which contains the electronics as originally supplied to the plant. The instability
" detect and suppress" function is new and is being incorporated into the digital PRNMR Procedures and training should be updated and considered part of the project.
Also, Mr. Reigel discussed the relationship between the work done by the BWR Owners Group (BWROG) to define the requirements for the " detect and suppress" function and the current GE work, which is fo'cused on implementation. He
- -w....- stated -that-the p1-ant-specific PRNM-submittal would confirm the applicability of the generic PRNM topical report and the BWROG methodology topical report (NED0-3196 and Supplement 1), and would contain the appropriate plant.
technical specification changes for PRNM. Hatch Unit 2 plans to implement the digital PRNM by September 1995, and will be followed by Fermi 2 and Browns Ferry 2.
Approval of the EPRI report TR-102323 is needed before the implementation of the plant-specific applications.
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. October 13, 1994 The staff had several comments regarding the environmental qualification of the equipment inside ti e panel (i.e., temperature, fire, and smoke effect),
total heat load inside the control room panel, the impedance level, the-approach to the " detect and suppress" algorithm, and the proposed implementation schedule. The staff requested that GE provide information on the outline of the technical report and the key technical issues as soon as possible to support their proposed schedule. The staff and GE representatives agreed to meet at San Jose, California, the week of October 10, 1994.
Attachments:
As stated cc w/ Attachments:
David W. Reigel, GE DISTRIBUTIDE R. Wilson, 0-8 D18 Central File R. Ledesma, 0-8 H3 PUBLIC H. Richings, 0-8 E23 PDil-3 R/F T. Vises WRussell/F. Miraglia, 0-12 M. Sinkule, RII RZimmerman, 0-12 G18 S. Varga G. Lainas OGC, 0-15 B18 E. Jordan, T-4 D18 ACRS (10), P-315 G. Tracy, 0-17 G21 B. Boger, RII J. Mauck, 0-8 H3 M. Waterman, 0-8 H3 DOCUMENT NAME:
G:\\ HATCH \\POWERRAN.MTG To,ecalve a copy of tide document, Indicate in the boa: *C' = Copy without attachinent/ enclosure "E" = Copy with attachrnent/ enclosure
- N" = No copy 0FFICE LA:PD23:DRPE lE PM:PD23:DRPE _f g l E l DDeaBCIL -;ff// l E 0:PD23:DQA'5 lE' l
NAME CNorsworthy[ M KJabbour:cdw k W JWermiel HBerkow 0 F DATE
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I', /94 0FFICLAL RECORD COPY 7
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4 o October 13, 1994 The staff had several comments regarding the environmental qualification of the equipment inside the panel (i.e., temperature, fire, and emoke effect),
i total heat load inside,the control room panel, the impedance level, the
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approach to the " detect and suppress" algorithm, and the proposed 1
implementation schedule. The staff requested that GE provide information on i
the outline of the technical report and the key technical issues as soon as possible to support their proposed schedule. The staff and GE representatives agreed to meet at San Jose, California, the week of October 10, 1994.
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Attachments:
As stated cc w/
Attachment:
David W. Reigel, GE g.
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5 September 14. 1994 i
NRC/GPC Meetino List of Attendees i
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NRC GE t
K. Jabbour F. Downey J. Mauck D. Reigel M. Waterman L. Gifford R. Wilson R. Ledesma H. Richings T. Ulses
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t S. Bethay, Georgia Power 1/
T. Mitchell, Georgia Power t..
B. Newtirk, Detroit Edison
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I NRC/GE/ Utility Licensing Planning Meeting NUMAC Power Ranae Neutron Monitor retrofit plus Stability 13 September 1994
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NRC/GE/ Utility Licensing Planning Meeting NUMAC Power Range Neutron Monitor (PRNM) Retrofit plus Stability 13 September 1994 Purpose of the meeting:
Review plans for Generic and plant specific licensing activities Agenda:
Topic Presenter
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General overview of project scope GE 2.
Submittals planned GE (w/ utilities)
Generic NUMAC PRNM Plant specific submittals Related BWROG submittals 3.
Planned relationship and sequencing of submittals GE 4.
Licensing issues and plans to resolve them GE/Ali 5.
Schedule objectives.
GE (w/ utilities) 6.
Discussion All 7.
Establish next actions GE/All
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r, General overview of prolemt scope Overall scope Existing Power Rpnge Monitor electronics replaced with NUMAC digital PRNM incorporate BWROG defined Option lli " detect and suppress" function into PRNM e
Update plant procedures and documentation
. Functionalimpact Power Range Monitor functions retained
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Local Power Range Monitor (LPRM) detector signal processing
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LPRM averaging, Average Power Range Monitor (APRM) trips One alternate reduces APRM channels, incorporates 2-out-of-4 final trip logic.
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Recirc flow signal processing
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Rod Block Monitor (RBM) logic and interlocks (where applicable)
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Data to the plant computer (changed to multiplexed form)
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Local power supply for electronics
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Add automatic instability detect and suppress function (phased implementation)-
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What changes?
Analog electronics replaced with digital electronics t
New function added (instability detect and suppress)
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Flow signal processing integrated with flux signal processing Number of averaging channels (for one attemate)
Final output trip logic (for one attemate) leolation mooomplished using optical means Method of setting gain constants (allows automatic download) e Operator's interface (one of the attemates)
Small number of fiberoptic cables added What does not change?
LPRM detectors Electrical cables outside the control panel l
p Basic system functions and architecture Interfaces with other systems (except plant computer).
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Licensing submittals. relationship and sequencing pknned l
BWROG long-term stability licensing methodology Topical Report NEDO-31960 & Supplement 1.
Defines basic logic and algorithms required for Option 111 detect and suppress function Provides basis for logic and algorithms Submitted and approved by NRC Generic NUMAC PRNM Retro-Fit Topical Report Overall retrofit project, enveloping application specific differences PRNM requirements and implementation Implementation of BWROG defined Option lli detect and suppress function Address digital retrofit issues EPRI TR-102348, " Guidelines on Licensing Digital Upgrades" as a guide General impact on Technical Specification Define specific plant unique issues, and criteria for closure Will reference BWROG Methodology Topical Reports (NEDO-31960 & Supplement 1) for stability trip requirements Second in the sequence w ww 13 September 1994 eneses.aturu
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Licensing submittals. relationship and se9uencing planned (continued)
Plant specific PRNM license amendment / Technical Specification Change submittal Confirm applicability of Generic PRNM Topical Report with any clarifications or reconcile differences Confirm / define applicability of BWROG Methodology Topical Reports Plant unique information within envelope covered by Generic PRNM Topical Report
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Plant unique information required to apply Generic BWROG Topical Reports Specific revised Technical Specification to cover PRNM Will reference PRNM Topical Report and BWROG Methodology Topical Report (NEDO-31960 &
Supplement 1)
Third in 'the sequence BWROG detect and suppress Top.ical Report Plant specific implementation requirements for basic logic and algorithms s
Provides basis for specific requirements Defines process by which plants will demonstrate safety limit protection Will reference BWROG Methodology Top: cal Report (NEDO-31960 & Supplement 1)
Fourth in the sequence i
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Licensing submittals. relationship and sequencing planned (continued)
Plant specific stability detect and suppress Technical Specification Change submittal Any changes in detect and suppress implementation resulting form trial period Plant specific values with confirmation of applicability of BWROG methods Specific revised Technical Specification to cover detect and suppress function Will reference all four of the above Fifth in the sequence r
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Licensing issues and plans to resolve them Digital equipment issues V&V o
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For GE scope, latest version of NUMAC V&V program
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Utility participation at key points in the precess
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Utility scope under existing QA programs
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Delivered equipment maintained by existing utility QA programs EMI
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Qualify equipment based on test (similar to recent NUMAC projects)
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Establish plant environment based on EPRI TR-102323
(" Guidelines for EMI testing in Power Plants")
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Document how qualified level covers plant environment Seismic
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Qualify equipment based on test
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Analytically demonstrate mounting location spectrum is enveloped
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.:q Licensing issues and plans to resolve thorn (continued)
Digital equipment issues Software comrpon cause faults
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Failure analysis to identify modes
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Document how safety functions are met using " defense in depth" concepts General issues Stability trip logic, set points, etc.
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Handled by BWROG 2-out-of-4 final trip logic e
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Failure analysis to demonstrate equal to or better than existing logic Technical Specifications
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Based on improved Technical Specifications
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9-Schedule objectives 1993 BWROG Long-Term Stability Solutions Licensing Methodology, NEDO-31960 and NEDO-31960, Supplement 1 approved.
1993 initiate NUMAC PRNM equipment design work i
2094 Deliver first NUMAC PRNM, non-US BWR 2O94 Initiate design work to incorporate Option ill into NUMAC PRNM 8/94 GE/ lead plant meeting to develop licensing plan
~ 9/94 Meet with NRC to review overall licensing plan, review key issues 10/94 Meet with NRC to eview technical issues and resolution status....
11/94 Meet with NRC to review technical issues and resolution status 12/94 BWROG Detect & Suppress technicalissues resoived (BWROG),
1/95 Submit Generic Topical Report, NUMAC PRNM Retrofit 3/95 Submit BWROG Detect & Suppress Topical Report (BWROG) 4/95 Lead plant system design complete 6/95 Lead plant hardware fabrication complete 7/95 NRC approval (SER) of Generic NUMAC PRNM Topical Repori 9/95 NRC approval (SER) of BWROG Detect & Suppress Topical Report i.
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