ML17285B261
| ML17285B261 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 05/04/1990 |
| From: | Samworth R Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| TAC-76488, NUDOCS 9005110192 | |
| Download: ML17285B261 (35) | |
Text
May 4, 1990 Docket No. 50-397 LICENSEE:
Washington Public Power Supply System FACILITY:
WNP-2
SUBJECT:
SUMMARY
OF MEETING HELD ON APRIL 19, 1990 WITH WASHINGTON PUBLIC POWER SUPPLY SYSTEM REPRESENTATIVES TO DISCUSS THE SCHEDULE FOR SIMULATION FACILITY CERTIFICATION (TAC NO. 76488)
On April 19, members of the NRC staff met with representatives of the licensee to discuss the simulator being procured for WNP-2.
Attachment 1 lists the meeting attendants.
The licensee described the procedures being followed to develop the new simulator.
They also informed the NRR staff of progress and problems encountered by the simulator vendor (Westinghouse).
The licensee also advised that significant upgrades have been effected for the existing simulator.
By letter dated April 4, 1990 the licensee had submitted an application for exemption to NRC regulations to extend the time by which the simulator must be certified.
The regulation requires certification by March 26, 1991.
The licensee proposed that they be issued an exemption to extend this date to December 31, 1991.
The existing simulator would continue in service until the new date.
Neal Hunemuller advised that NRC has no comment on the WPPSS application for an exemption at this time.
Copies of slides provided by the licensee are included here as attachment 2.
original signed by Robert B. Samworth Robert B. Samworth, Senior Project Manager Project Directorate V
Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation DISTRIBUTION NRC 5 LPDRs F. Miraglia J. Partlow J. Larkins R. Samworth OGC E. Jordan NRC Participants ACRS (10)
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SUMMARY
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Docket No. 50-397 UNITEDSTATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 May 4, 1990 LICENSEE:
Washington Public Power Supply System FACILITY:
WNP-2
SUBJECT:
SUMMARY
OF MEETING HELD ON APRIL 19, 1990 WITH WASHINGTON PUBLIC POWER SUPPLY SYSTEM REPRESENTATIVES TO DISCUSS THE SCHEDULE FOR SIMULATION FACILITY CERTIFICATION (TAC NO. 76488)
On April 19, members of the NRC staff met with representatives of the licensee to discuss the simulator being procured for WNP-2.
Attachment 1 lists the meeting attendants.
The licensee described the procedures being followed to develop the new simulator.
They also informed the NRR staff of progress and problems encountered by the simulator vendor (Westinghouse).
The licensee also advised that significant upgrades have been effected for the existing simulator.
By letter dated April 4, 1990 the licensee had submitted an application for exemption to NRC regulations to extend the time by which the simulator must be certified.
The regulation requires, certification by March 26, 1991.
The licensee proposed that they be issued an exemption to extend this date to December 31, 1991.
The existing simulator would continue in service until the new date.
Neal Hunemuller advised that NRC has no comment on the WPPSS application for an exemption at this time.
Copies of slides provided by the licensee are included here as attachment 2.
Robert B. Samworth, Senior Project Manager Project Directorate V
Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation
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Mr. G.
C. Sorensen WPPSS Nuclear Project No.
2 (WNP-2)
CC:
Mr. C.
M. Powers WNP-2 Plant Manager Washington Public Power Supply System P.O.
Box 968, MD 927M Richland, Washington 99352 Mr. G. E. Doupe, Esquire Washington Public Power Supply System P. 0.
Box 968 3000 George Washington Way Richland, Washington 99532 Mr. Curtis Eschels, Chairman Energy Facility Site Evaluation Council Mail Stop PY-11 Olympia, Washington 98504 Mr. Alan G. Hosier, Licensing Manager Washington Public Power Supply System P. 0.
Box 968, MD 956B Richland, Washington 99352 Mr. A. Lee Oxsen Assistant Managing Director for Operations Washington Public Power Supply System P. 0.
Box 968, MD 1023
- Richland, Washington 99352 Mr. Gary D. Bouchey, Director Licensing and Assurance Washington Public Power Supply System P. 0.
Box 968, MD 280
- Richland, Washington 99352 Regional Administrator, Region V
U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, Califor nia 94596 Chairman Benton County Board of Commissioners
- Prosser, Washington 99350 Mr. Christian Bosted U. S. Nuclear Regulatory Commission P. 0.
Box 69 Richland, Washington 99352 Nicholas S. Reynolds, Esq.
- Bishop, Cook, Purcell 5 Reynolds 1400 L Street NW Washington, D.C.
20005-3502
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LIST OF ATTENDEES NRC Robert B. Samworth Neal K. Hunnemuller WPPSS Larry Aeschliman Joseph P.
Burn David W. Fraley David L. Larkin
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NEW SIMULATOR PROJECT STATUS APRIL 19, 1990 WASHINGTOND.C.
WNP-2 SIMUL4TOR
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SYSTEM DEFINITION v /~)
o Prelinunary (scope) documents completed by vendor; Supply System review is 88%
complete.
o Malfunction cause k effect descriptions 36% complete; expected by 9/Ol/90.
o Acceptance test procedures in preparation:,
additional negotiation on test scope in process.
o SUPPLY SYSTEM IS EMPHASIZING"UP-FRONT" DOCUMENTATION.
WlVP-2 SIMULATOR
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SYSTEM MODELDEVELOPMENT o
COMPONENT MODELS Valve source programs 80% complete Pump source programs 70% complete o
SYSTEM MODELS Assumptions and approximations Derivations of equations Calculation ofmodel constt'aints Review prior to coding authorization Document preparation now in earnest o
SYSTEM MODELDEVELOPMENTIS BEHINDSCHEDULE 3 to 6 months o
VENDOR HAS PROPOSED RECOVERY SCHEDULE TO MAIINTAjÃTHEIR PRE-FACTORY ATP DATE
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HARDWAREDEVELOPMENT o
MAINCONTROL'BOARDS ON VENDOR FLOOR BY MAY 1, 1990 o
AU3QLIAXYPANELS EXPECTED BY KJLY 1, 1990.
Panel delivery schedule has slipped by two (2) months o
DOCUMENTATION Billof Material and Wirelist is complete for all panels Hardware designdocumentationreviewedby Supply System o
PAI&LDISCREPANCIES BEING RESOLVED ATVENDOR FACILITY;SUPPLY SYSTEM RESIDENT STAFF
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MA OR CONCERNS 1.
Staff Resources Key modelers continue to be diverted on other customer's projects. Although some project staff have been added there is no evidence ofcommitment.
2.
Model Develo ment Momentum has not been achieved. Initialmodel documentation was unacceptable for one ofthree systems.
Schedule slips have started. (Model development is a serial process, for which added resources cannot help schedules.)
3.
Confi urationMana ement Ours is one of the first integrated (Database and Simulator) systems for Westinghouse.
We don't believe that all problems have been resolved. Recent Database and Configuration Management System problems substantiate our concern.
4.
Qua~lit We need to strike a delicate balance between our determination to have the highest fidelity and on schedule delivery.
Signals indicate that our staff will soon be taxed in providing sound technical review and responses to data requests.
Several recent deliverables appear to sacrifice quality to meet schedules.
Other Westinghouse customers (e.g. GPUN) have been pressed to start testing before all design reviews were complete and the models installed. We cannot allow a similar situation. Allindicators point to this happening.
04-l7-90
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SIMULATORUPGRADES PROGRAM STATUS APRIL 19, 1990 WNP-2 SIMULATOR
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SIMULATORUPGRADES - BACKGROUND o
December 1988 - action plan for incremental improvements presented to Region S NRC office.
o Consultant review of simulator problem areas and specification for model upgrades.
o Contract established in mid-Aprilfor model development.
o First phase to June 30, 1989
- Development, entry and compilation of replacement boiler model.
- Upgrade of condensate and feedwater and-main steam models.
o Second phase to December 30, 1989
- Integration ofnew boiler with feedwater heaters, contahunent, etc.
- Instructor/operating system modifications.
o Follow-on support
- Correct deficiencies identified during testing.
- Install training set SFP-2 SIMUL4TOR 04-l9-90
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SIMULATORUPGRADES - SCOPE o
Consultant improves or replaces models in the. main energy loop including:
Boiler/Recirculation System Condensate and Feedwater Steam Lines o
Contractor makes Instructor/Operating system improvements:
IC stabilization Malfunction initiation o
Our staff will:
WNP-2 SIMUL4TOR Install new plant process computer and display simulator (PPCRS and PDIS).
Address change requests.
Upgrade other simulator systems.
Primary Containment Diesel Generators ECCS System Work with contractor to integrate new models.
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SII'NULATORUPGRADES - STATUS o
Twelve (12) oftwelve (12) PMR's in the ActionPlan and six (6) new PMR's are cleared, and two hundred ninety (290) additional change requests have been cleared.
o Upgrade models installed with all "show stopper" problems resolved.
o Instructor system problems corrected.
o Plant computer hardware installed; interface complete and displays are operational.
Data point verification continues.
o Simulator used for license examination - no major discrepancies identified.
WNP-2 SIMUL4TOR
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CURRENT SIMULATORUPGRADES - PRIORITIXKDSYSTEMS o
Boiler/Core System including Recirculation Loops Boiler - Installed replacement model.
Core = Revised reactivity feedbacks.
Recirc Loops - Revised jet pump f1ow calcualtions.
o Condensate and Feedwater Condenser - Revised heat transfer calculations.
Cnd Ez, Feed Flow.- Replaced flownetwork model.
Revised pump curves.
Revised feed pump turbine dynamics 8'c control system.
Feedwater Heaters - Installed replacement model.
o Operating System Modifications Local Operator. Actions - Improved system interface.
IC Set set scrambled - Located and corrected code error.
Malfunction save file - Provided for malfunction saving and LOAsets (1-99) indepen-dent ofIC sets.
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CURRENT SIMUIATOR UPGRADES - PRIORITIXEDSYSTEMS cont o
Main Steam Main header pressure/flow calculation revised.
o Primary contairunent Installed replacement Model.
o RWCU Models Model revised to interface with new boiler model and improved mass/energy balances.
o Diesel Generators Model revised to provide "slow start" required by surveillance test.
o ECCS Systems Dynamics revised to interface with new boiler model.
Logic revised to include plant changes.
04-19-90
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TEST PLANFOR UPGRADES 1.
Normal Start-up Ez. Shutdown 2.
Full Power Feedpump Trip 3.
RRC Control Valve Failure 4.
Recirc Trip, Isolation 8c Recovery 5.
MSIVClosure 6.
Turbine Trip From FuQ Power, Hot Shutdown To Synch Generator 7.
Turbine Trip From FullPower, No Bypass Valves 8.
Loss OfAllHigh Pressure Systems - No Water Prior To Low Pressure Injection 9.
Small k Large Steam leaks in Contahunent 10.
Small 8c Large Breaks in the RRC Loops 11.
Hydraulic A'AVISStraight Up 12.
Hydraulic A'PVIS withMSIVClosure 13.
Station Blackout WNP-2 SIMULATOR
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OPERATING/INSTRUCTOR SYSTEMS IMPROVEMENTS o
Arbitrary IC Scrambles Resolved and all recent discs corrected, old IC's reshot as required for testing.
o Loss of Device Overrides Corrected; after resets, only newly reset devices or input overrides are active.
o Malfunction Save/Restore Feature added to instructor system software to allow saves for reset.
o Malfunction Yxiggers Logical functions using real variable comparisons can now be written.
WWP-2 SIMULATOR 04-l9-90
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MA OR SIMULATOR VS PLANTDIFFERENCES O
1.
RPV level overfills on a turbine trip.
O 2.
RPV level does not have correct swell characteristics during SRV cycling.
O 3.
RPV level does not response correctly during LOCA's.
O 4.
Power vs Flow response not correct during transients.
O 5.
Natural circulation Qow not correct.
6.
RPV level reduction does not reflect reactor power during an ATWS transient.
O 7.
CBP's inject at 700 psig.
O 8.
RFW pumps run at a higher RPM for a given flow.
O 9.
Condensate and FW response is sluggish during a transient.
- 10. OG and condenser vacuum response not correct for a given air leak.
11 Loss of a CW pump effects vacuum excessively.