ML16342A043
| ML16342A043 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 03/30/1993 |
| From: | Peterson S Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9304060118 | |
| Download: ML16342A043 (92) | |
Text
Pacific Gas and Electric Company 2
March 30, 1993 Identification of plant specific code Verification and validation tools Potential for interrupts in the software area Panel wiring Cross calibration and general testing Automatic testing Training Simulator applications Configuration Management The licensee agreed to address these issues prior to audits the staff plans to conduct at Westinghouse and PGKE in April 1993.
The RTD bypass elimination was also discussed.
The staff requested that the licensee provide the calculation associated with the 2.4N flow uncertainty and the uncertainty analysis with regard to temperature deviations.
These issues and any additional questions will be addressed in a request for additional information.
The schedule for completing the staff's review of the licensee's proposed amendment was discussed with regard to the licensee's administrative requirements on preparing modification packages for outage planning purposes.
The licensee currently plans to implement the Eagle 21 upgrade and RTD bypass elimination during the 1R6 refueling outage for Unit 1 scheduled to begin February 1994 and the 2R6 refueling outage For Unit 2 scheduled to begin September 1994.
At the meeting, the staff agreed to June 1993 as the schedule for completing the review of the Eagle 21 upgrade, provided the necessary information is available.
Ql'iginal signed by Sheri R. Peterson, Project Manager Project Directorate V
Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation
Enclosures:
1.
List of Attendees 2.
Presentation Slides cc w/enclosures:
See next page 93040bOi 18,930330 PDR ADOCK(05000275
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- JPartlow, 12G18 JRoe HVirgilio Tguay DFoster
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- JWermiel, 10D24 HBalukjian, 8E23 JMauck.
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/30/93
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Pacific Gas and Electric Company
- 2 Identification of plant specific code Verification and validation tools Potential for interrupts in the software area Panel wiring Cross calibration and general testing Automatic testing Training Simulator applications Configuration Hanagement The licensee agreed to address these issues prior to audits the staff plans to conduct at Westinghouse and PGKE in April 1993.
The RTD bypass elimination was also discussed.
The staff requested that the. licensee provide the calculation associated with the 2.4/. flow uncertainty and the uncertainty analysis with regard to temperature deviations.
These issues and any additional questions will be addressed in a request for additional information.
The schedule for completing the staff's review of the licensee's proposed amendment was discussed with regard to the licensee's administrative requirements on preparing modification packages for outage planning purposes.
The licensee currently plans to implement the Eagle 21 upgrade and RTD bypass elimination during the 1R6 refueling outage for Unit 1 scheduled to begin February 1994 and the 2R6 refueling outage for Unit 2 scheduled to begin September 1994.
At the meeting, the staff agreed to Dune 1993 as the schedule for completing the review of the Eagle 21 upgrade, provided the necessary information is available.
Enclosures:
1.
List of Attendees 2.
Presentation Slides Sheri R. Peterson, Project Manager Project Directorate V
Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation cc w/enclosures:
See next page
1,)
Mr. Gregory H. Rueger Pacific Gas and Electric Company Diablo Canyon CC:
NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0.
Box 369 Avila Beach, California 93424 Dr. Richard Ferguson, Energy Chair Sierra Club California 6715 Rocky Canyon
- Creston, California 93432 Hs.
Nancy Culver San Luis Obispo Mothers for Peace P. 0.
Box 164 Pismo Beach, California 93448 Ms'acquelyn C. Wheeler 3303 Barranca Court San Luis Obispo, California 93401 Hanaging Editor The County Telegram Tribune 1321 Johnson Avenue P. 0.
Box 112 San Luis Obispo, California 93406 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 Hr. Truman Burns Hr. Robert Kinosi an California Public Utilities Commission 505 Van Ness, Rm.
4102 San Francisco, California 94102 Diablo Canyon Independent Safety Committee ATTN:
Robert R. Wellington, Esq.
Legal Counsel 857 Cass Street, Suite D
Monterey, California 93940 Hr. Steve Shu Radiologic Mealth Branch State Department of Health Services Post Office Box 942732 Sacramento, California 94234 Regional Administrator, Region V
U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Hr. Peter H. Kaufman Deputy Attorney General State of California 110 West A Street, Suite 700 San Diego, California 92101 Michael M. Strumwasser, Esq.
Special Assistant Attorney General State of California Department of Justice 3580 Wilshire Boulevard, Room 800 Los Angeles, California 90010 Christopher J. Warner, Esq.
Pacific Gas
& Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. John Townsend Vice President and Plant Hanager Diablo Canyon Power Plant P.
O.
Box 56 Avila Beach, California 93424
ENCLOSURE 1
ATTENDEES MARCH 10 1993 MEETING BETWEEN THE NRC STAFF AND PG&E TO DISCUSS PROPOSED EAGLE 21 PROCESS PROTECTION NAME L. Erin P.
Ful ford C. Antonesan H. Balukjian J.
Wermiel J.
Hauck R. Skokowski S.
Peterson B. Lint J.
Tomkins J. Hefler K. Herman M. Smith R.
Webb R. Johnson R. Johansen B. Hiller C.
Harmo G. Brassart H. Murphy J.
Bass H. Hiller H. Osborne ST Andre W. Scherder ORGANIZATION I&C Licensing LIS/NUS NRC/RES/DE/EMEB NRC/OSSA/SRXB NRC/DRCH/HICB NRC/DRCH/HIC8 NRC/NRR NRC/DRPW/PDV PG&E PG&E PG&E PG&E PG&E PG&E PG&E PG&E Westinghouse Westinghouse Westinghouse Westinghouse Westinghouse Westinghouse Westinghouse Westinghouse Westinghouse
J
~
DIABLO CANYON UNITS 1 ancf 2 Eagle 21 RTD Bypass Elimination NRC/PG8 E Meeting March 10, 1993
1
1.
Opening Remarks 2.
Introduction/Overview 3.
Eagle 21 4.
RTDBE
- 5. Status/Schedule
- 6. Comments/Discussion NRC PGBE PGS.E PG&E PGRE NRC/PGRE
MEETING 08JECTIVES
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Describe implementation in Diablo Canyon
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Answer Staff questions
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Identify any loose ends
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Get review off to a good start obj
Il I
EAGLE 2 I/RTOBE LAR
/
. LAR proposes to:
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Replace W 7100 analog process protection equipment with W Eagle 21 digital equipment
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Eliminate the RTD hot and cold leg bypass manifolds and install thermowell-mounted RTDs
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Make certain functional upgrades
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Make appropriate technical specification changes Equipment installation:
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1R6 (March 1994)/2R6 (September 1994) eagl
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DIABLO CANYQN UNITS 7 B.nd 2 Eagle 21, Process Protection System Upgrade
REASQNS FQR UPGRADE
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Replace aging 7100 analog system
- Unavailability of spare parts
- High cost 8 long ead time for new modules
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Reduction in maintenance time
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Reduce probability of unnecessary trip
- Test in bypass not partial trip mode
- MMI/technican interface improved
- Automatic surveillance testing
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Incorporate functional upgrades
- RTD Bypass Elimination
- New Steamline Break Protection
- S/G Low-Low Level Trip Time Delay
- Hi-Hi S/G Level Turbine Trip setpoint change
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Provide for future expansion
WHYEAGLE 27
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Form, fit 8 functional replacement for W 7100 system
- uses existing racks
- minimal impact on field wiring
- maintains existing signal interfaces Digital system with substantial operating experience
- in use at 6 operating units
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Provides solution to all "REASONS FOR UPGRADE"
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SUBMITTALS
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- Technical Specification changes
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WCAP-13423 - Topical Report
- Hardware description
- Software description
- V&VPlan
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WGAP-12813-R2 - Summary Report
- Discussion of functional upgrades
- Safety analyses for functional upgrades
- Defense-in-depth analysis
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WCAP-12934 - DCPP VB V Report
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EMI/RFI Survey Report
J
TECHNICAL SPECIFICATIONS CHANGES
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Definition revisions for digital channels
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Allowable value revisions to reflect rack drift allowances for Eagle 21
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Low-low SG water level revisions to reflect TTD
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OTZT and OPET revisions to reflect uncertainty and time response of new RTDs
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ESFAS changes related to new steam line break protection logic
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Allowance for testing and maintenance in bypass
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SG water level high-high trip setpoint increase from 67 to 75% for turbine trip and feedwater isolation
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DESIGN SCQPE
~ Hardware upgrade
~ Functional upgrades
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EAGLE-21 IMPLEMENTATION mergency Control Room Plant Computer Supervisory Island Control Room ERF and Plant Computer Technical Support Center rain A8 Misc.-
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Relay Racks NIS 24b l23ISN4X 044 Process Protection Racks Process SSPS or Control Relay Racks Prot.
Logic Typical IBG System Block Diagram
Eagle 21 Desi n Philosophy
~ Form, fit and function replacement
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Analog System = Digital System Terminal
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EAGLE 21 EQUIPMENT DESCRIPTION
~
Input/Output Subsystem
~
Loop Processor Subsystem
~
Tester Subsystem
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EQUIPMENT CHANGEPUT Installation is straightforward
- W to install
- DCPP testing follows W
~
Last W installation performed in 19 da s
~
e ailed outage planning in progress at DCPP
Ea te 21 Subsystems nputl Output Subsyste Sensor Card Gage TQ TI'ip Logic SjbsyP,.~m To
- Control, MCB, Computers, etc.
816 G32372.014 SIR Bus To Man-Machine-Interface Test Cart
Eagle 21 Loo Processor Subs stem Auto Calibration To Analog Output Modules Analog input Modules C
'i To Contact Partial OutPut and TriP Modules Output Modules From Contact Input Module Parameter Update To Tester Subsystem
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From Loop Processor Subsystem To Loop Processor Subsystem Parameter Update BIT BUS
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Output Subsystem SIR BUS To Input/ Output Subsystem Man-Machine-Inter face Test Gart B 18 632372.011
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Figure 6-0 Existing Analog 3-Bay Cabinet Typical Mfestinghouse 7'l00 Series
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Figure 6-3 Existing Cabinet (Analog Equipment Removed) EAGLE 2l Mounting Rails installed
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OlABlO CAIVYOM-SPECIFIC TOF'lCS
~
Software Integrity
- V8V Program Plan (WCAP-1 3423, App. A)
- DCPP V8 V Report (WCAP-12934)
- Defense-In-Depth Analysis (WCAP 12813-R2)
~
EMI/RFI Environment
- NTS/Acton survey
~
Power Supply
- Vital inverter replacement
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Utility/Vendor Interface
P
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FU/VC7IQNAL UF'GRAQES
~
RTD Bypass Elimination
- Eagle 21 provides algorithms to facilitate this upgrade
~
New Steamline Break Protection
- Same scheme used in all later vintage W plants
~
S/G Low-Low Level Trip Time Delay
- Delays low-low level trip during transients at low power levels (<50/o)
~
S/G High-High Level Turbine Trip setpoint change
- Increases operating margin
- Not really Eagle 21 but requires technical specification change
EAGLE-21 PROTECTION SYSTEM EQUIPMENT QUALIFICATIONDOCUMENTATION I
WCAP-8587, REV. 6A o
WESTINGHOUSE METHODOLOGYFOR QUALIFYINGSAFETY RELATED ELECTRICAL EQUIPMENT o
WESTINGHOUSE INTERPRETATION OF IREE STD. 323-1974 o
WESTINGHOUSE INTERPRETATION OF IEEE STD. 344-1975 o
SAFETY EVALUATIONREPORT DATED NOVEMBER 30, 1983 WCAP-8587, SUPPLEMENT, EQDP-ESE-69, REV. 1 o
EAGLE-21 EQUIPMENT QUALIFICATION DATAPACKAGE o
SUMMARY
OF EAGLE-21 TEST P&4QHETERS, EQUIPMENT PERFORMANCE REQUIREMENTS, AND TEST RESULTS
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WCAP-8687, SUPPLEMENT 2-E69A, 2-E69B, L 2-E69C o
EAGLE-21 EQUIPMENT QUALIFICATION TEST REPORT o
DETAILEDDESCRIPTION OF EAGLE-21 TEST PARM4ETERS, EQUIPMENT PERFORMANCE REQUIREMENTS, AND TEST RESULTS
/
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EAGLE-21 PROTECTION SYSTEM NOISE, FAULT, AZC) RFI TEST PROGtuAI WCAP-11733 o
DEMONSTRATED THE EAGLE-21 SYSTEM REMAINED OPERATIONALBEFORE, DURING AND AFFER THE APPLIED CONDITIONS o
DEMONSTRATED THE PROTECTION TO CONTROL ELECTRICALISOLATIONCAPABILITIESOF THE EAGLE-21 SYSTEM TESTS PERFORMED:
o NOISE INTERFERENCE o
FAULTISOLATION o
SURGE WITHSTAI'6)CAPABILITY o
RADIO FREQUENCY INTERFERENCE
I
SYSTEM DESIGN, VERIFICATIONR VALIDATION{V%V)PROCESS o
SYSTEM DESIGN:
Top Down System Definition, Design & Implementation of the Design Requirements o
SOFI'WARE VERIFICATION:
Demonstrates that EACH Software Element performs its REQUIRED Function o
SYSTEM VALIDATION:
Demonstrates that the IÃZEGRATED System (Hardware & Software) Design MEETS the System Functional Requirements o
PROCESS EVOLUTION:
Started with RESAR 414 Integrated Protection System Program ANSUIEEE 7-4.3.2, 1982/Regulatory Guide 1.152, 1985 First Applied in the Software V&Vof the South Texas Qualified Display Processing System (QDPS)
Adopted for Eagle-21 Software Design V&Vplan has been reviewed and approved by NRC as part of the Watts Bar Unit 1, Sequoyah Units 1 & 2, Turkey Point Units 3 & 4 and Zion Units 1 & 2 process protection system upgrades.
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SYSTEM DESIGN PROCESS Design is based on the following documents:
Protection System Functional Requirements and Diagrams Plant Specific Controlled Drawings Plant Walkdown Data Requirements are decomposed into design documents:
System Design Requirements & Specifications Process Control Block Diagrams Plant Configuration Drawings Software Design Requirements & Specifications (SDR, SDS)
Software Code Software 4 System Integration Tests are performed by Design Team Design Documentation R Source Code Configuration is Controlled Using DEC CMS Configuration Management Manufactured Systems undergo comprehensive Factory Acceptance Tests
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SOFI'WARE VERIFICATIONPROCESS o
Demonstrates that each Software Element (Module) performs its REQUIRED safety function properly as SPECIFIED by the SYSTEM FUNCTIONALREQUIREMENTS DOCUMENTS Code R Document Reviews Software Verifiers compare code to Software Design Specifications, Software Design Requirements and Coding Standards Inconsistencies Found Result-in Problem Reports 0
Software Testing Only NEW or FUNCTIONALLYModified Code is Tested Automatic Tests Performed on Each Module of Code Test Cases Developed from the Software Design Specification Inconsistencies found result in Problem Reports Problem Reports Tracked on an On-Line Database
SYSTEM VALIDATIONPROCESS Ensures a Proper Design Translation has occurred from the Protection System Functional Requirements through the As-Built System Equipment Tested as an Integrated System Validation Includes:
Hardware Reviews Engineering Tests Software Configuration Validation Review Factory Acceptance Testing Validation Testing Prudency Testing o
System Tested with both Normal R Abnormal Inputs (i.e., Out of Range inputs, etc.)
0 Problem Reports generated ifTesting/Reviews Indicate Design DOES NOT Reflect Design Requirements Problem Reports Tracked on an On-Line Database
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EAGLE-21 LICENSING EXPERIENCE 0
Eagle-21 Process Protection System has been successfully licensed for several Westinghouse Plants TVA-Watts Bar Unit 1 (4 Racks - RTD Bypass Elimination)
TVA-Sequoyah Units 1 & 2 (Full Protection System Replacement with RTD Bypass Elimination, Trip Time Delay, Environmental Allowance Modifier&
New Steamline Break Protection)
FP&L - Turkey Point Units 3 & 4 (3 Racks - RTD Bypass Elimination)
Zion Units 1 & 2 (Full Protection System Replacement - Form, Fit &
Function) 0 Eagle-21 Process Protection System is in the licensing process for:
PG&E - Diablo Canyon Units 1 & 2 (Full Protection System Replacement with RTD Bypass Elimination, Trip Time Delay, & New Steamline Break Protection)
TVA-Watts Bar Unit 1 (Full Protection System Replacement with RTD Bypass Elimination, Trip Time Delay, &New Steamline Break Protection)
LICENSING Y PIC FERENCE ISCU ION DIABLOCANYON EAGLE-21 TOPICAL REPORT W CAP-13423 REVIEWED BY NRC STAFF ON SEQUOYAH, TURKEY POINT, & ZION DOCKETS RBF: WCAP-12374 TEMPERATURB AVERAGING SYSTEM FUNCTIONALDESIGN W CAP-12632 RBVIBWBDBY NRC STAFF ON SEQUOYAH & TURKEY POINT DOCKETS RBF: WCAP-12504 RBF: WCAP-12632 TRIP TQdE DELAYAND NEW SIRIMUNHBl!EAK FUNCTIONALDESIGN WCAP-12632 REVIEWED BY NRC STAFF ON SEQUOYAH DOCKET REF: WCAP 12504 EAGLE-21 SEISMIC AND WCAP-8587 ENVIRONMENTALEQUIPMENT WCAP-8687 QUALIFICATION REVIEWED BY NRC STAFF ON SEQUOYAH ANDWATI'S BAR DOCKETS EAGLE-21 NOISE, FAULT, SURGE, AND RFI EQUIPMEN'I'UALIFICATION WCAP-11733 REVIEWED BY NRC STAFF ON SEQUOYAH, WATI'S BAR, TURKEY POINT, & ZION DOCKETS EAGLE-21 DESIGN, VERIFICATIONAND VALIDATIONPLAN WCAP-13423 REVIEWED BY NRC STAFF ON SEQUOYAH, TURKEY POINT, & ZION DOCKETS REF: WCAP 12374, QUARTERLY SURVEILLANCE/
INCREASED 'IIMEALLOWANCES FOR "CHANNELIN BYPASS" FUNCTIONALDIVERSITY/
DEFENSB IN DEPTH WCAP-10271 WCAP-12632 EAGLE-21 APPLICABILITY RBVIBWEDBY NRC STAFF ON SEQUOYAH &'IURKBY POINT DOCKETS REVIEWED BY NRC STAFF ON ZION DOCKET
I
DIABLO CANYON UNITS 1 and 2 RTD Bypass Elimination
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P STEAMGENERATOR HOT LEG VENT TE TE f
COLD LEG MANIFOLD BYPASS Fl FLOW INSTRUMENT VENT TE TE
'EACTOR COOLANT PUMP DRAIN COLD LEG DRAIN HOT LEG MANIFOLD TYPICALRTD LOOP
>20'OT LEG PENETRATION DETAIL
OISAQVANTAGES OF BYPASS SYSTEM
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Lack of reliability/plant shutdowns
- Valve packing and mechanical joint leakage
- Flow reductions due to valve problems
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High Radiation Dose
- Valve and socket joints are crud traps
- Valve maintenance results in significant exposure
- Maintenance work on S/G'and RCP also affected
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/
ADVANTAGESOF RTD BYPASS ELIMINATION Eliminates
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500 Feet of RCS pressure boundary piping
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Approximately 30 snubbers
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More than 100 hangers
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60-70 valves (20 of which are subject to stem/disk separation failure)
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Reduces
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Man-rem exposure (30% per refueling outage)
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Maintenance activities for snubbers and valves
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In-service inspections
~ )
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REPLACEMENT SYSTEM
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All bypass loop piping, valves, manifolds, etc., eliminated
/
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Thermowell mounted, dual element RTDs are installed
.in the loop piping
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The three T-hot signals in each loop are averaged to produce one T-hot signal for the loop
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Signal from RTD in cold leg replaces signal from RTD in bypass loop
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Return line connection capped
~ ~
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- STEAM GENERATOR HOT LEG T
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REACTOR COOLANT PUMP COLD LEG
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Reactor cootant pump motor s
prtmartl loop ptpo floni stoaln Qohdt&g~ loQ Primay foop g>> from reactor "hot leg" a
PIQTlSpg loop pipe 'lo reactor cootafa pump suctfon croseuntfol a
Roazsor vessel support e
Stean generator support wtth sfdhg frame c
Reactor cootant puny support o
prossurtzer support E
CrossElnrfor pipe ostblafrs r
Upper steam ennerstrx latoraf estttafra o
Steam Qoneraor lateral rostratm igaapphhlraaggmmstiffoner Upper prossurtzer lateral osttatlnt DIABLOCANYON UNIT 1 PRIMARY SYSTEM EQUIPMENT AND SUPPORTS
( ~
SCHEDULE CONSIDERATIIONS
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Installation - 1R6 (March 1994)/2R6 (September 1994)
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License amendment needed
- June 1993
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Why June?
- Outage philosophy of no last minute changes
- Detailed outage planning
- Outage design completion/issue date is May 8
- Eagle 21 High Impact Team meetings already underway
0 P