ML020390447
| ML020390447 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 02/07/2002 |
| From: | Graves D NRC/RGN-IV/DRP/RPB-A |
| To: | Terry C TXU Generation Co, LP |
| References | |
| Download: ML020390447 (42) | |
Text
UNITED STATES 0
NUCLEAR REGULATORY COMMISSION REGION IV 611 RYAN PLAZA DRIVE, SUITE 400 4
ARLINGTON, TEXAS 760111-8064 F EB - 7 2002 Mr. C. L. Terry, Senior Vice President
& Principal Nuclear Officer TXU Generation Management Company LCC, Managing General Partner for TXU Generation Company LP ATTN: Regulatory Affairs Department P.O. Box 1002 Glen Rose, Texas 76043
SUBJECT:
SUMMARY
OF MEETING REGARDING UPDATE ON ELECTRIC RELIABILITY COUNCIL OF TEXAS, INC. (ERCOT) STRUCTURE AND OPERATIONS AND MAINTAINING TEXAS NUCLEAR PLANT DESIGN BASES
Dear Mr. Terry:
This refers to the meeting conducted in the Region IV office on January 24, 2002. This meeting was held to discuss changes to ERCOT's structure and operations to support the Texas nuclear plants' design bases given the current deregulated electrical industry environment in Texas.
The meeting was informative in providing insights into the relationships, including agreements and communications protocols, that exist between the qualified scheduling entities, the power generating companies, the load serving entities, the transmission and distribution service providers, and ERCOT, the grid manager, that exist to ensure that the design bases are maintained for both Comanche Peak Steam Electric Station and South Texas Project.
In accordance with 10 CFR 2.790 of the NRC's "Rules of Practice," a copy of this letter and its enclosures will be made available electronically for public inspection in the NRC Public Document Room or from the Publicly Available Records (PARS) component of NRC's document system (ADAMS). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/ADAMS.htmi (the Public Electronic Reading Room).
Should you have any questions concerning this matter, we will be pleased to discuss them with you.
Sincerely, David N. Graves, Chief Project Branch A Division of Reactor Projects
TXU Generation Company LP
Enclosures:
- 1. Attendance List
- 2. Licensee Presentation cc:
Roger D. Walker Regulatory Affairs Manager TXU Generation Company LP P.O. Box 1002 Glen Rose, Texas 76043 George L. Edgar, Esq.
Morgan, Lewis & Bockius 1800 M. Street, NW Washington, D.C. 20036 G. R. Bynog, Program ManagerI Chief Inspector Texas Department of Licensing & Regulation Boiler Division P.O. Box 12157, Capitol Station Austin, Texas 78711 County Judge P.O. Box 851 Glen Rose, Texas 76043 Chief, Bureau of Radiation Control Texas Department of Health 1100 West 49th Street Austin, Texas 78756-3189 John L. Howard, Director Environmental and Natural Resources Policy Office of the Governor P.O. Box 12428 Austin, Texas 78711-3189 Sam Jones, Chief Operating Officer ERCOT 7620 Metro Center Drive Austin, Texas 78744 James A. Byrd, Vice President Grid Management ONCOR 2233-B Mountain Creek Parkway Dallas, Texas 75211-6716 ENCLOSURE 1 MEETING ATTENDANCE LICENSEE/FACILITY ERCOTITXUISTPNOC/RELIANT ENERGY DATE/TIME January24, 2002 1:30 P.M.
SUBJECT Update on Electric Reliability Council of Texas, Inc. (ERCOT)
Structure and Operations, and Maintaining Texas Nuclear Plant Design Bases NAME (PLEASE PRINT)
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MEETING ATTENDANCE LICENSEE/FACILITY ERCOTITXU/STPNOC/RELIANT ENERGY DATE/TIME January 24, 2002 1:30 P.M.
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Structure and Operations, and Maintaining Texas Nuclear Plant design Bases_
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MEETING ATTENDANCE LICENSEE/FACILITY ERCOTITXU/STPNOC/RELIANT ENERGY DATE/TIME January 24, 2002 1:30 P.M.
SUBJECT Update on Electric Reliability Council of Texas, Inc. (ERCOT)
Structure and Operations, and Maintaining Texas Nuclear Plant Design Bases NAME (PLEASE PRINT)
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MEETING ATTENDANCE LICENSEE/FACILITY ERCOT/TXU/STPNOC/RELIANT ENERGY DATE/TIME January24, 2002 1:30 P.M.
SUBJECT Update on Electric Reliability Council of Texas, Inc. (ERCOT)
Structure and Operations, and Maintaining Texas Nuclear Plant Design Bases NAME (PLEASE PRINT)
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E14CLOSURE 2 INTRODUCTION J.J. Kelley, Jr.
Vice President Nuclear Engineering & Support TXU Generation Company LP and Member of the STP Nuclear Safety Review Board
Update on ERCOT Structure and Operations, and Maintaining Texas Nuclear Plant Design Bases
INTRODUCTION Presentations By ERCOT, CPSES and STP, with Support from their TDSP and QSE January 24, 2002
INTRODUCTION
- Purpose of Meeting
- Overview of the deregulated Texas electric market structure
- How the design basis of Texas nuclear generating plants are maintained in a deregulated market
- How voltage conditions are monitored
- Actions on degraded voltage conditions
- Continuing communications
INTRODUCTION
- Nuclear Plant Design Requirements
- Evans Heacock, STP Design Engineering
- Ijaz Ahmad, CPSES Design Engineering
- Texas Grid Reliability
- Sam Jones, ERCOT Chief Operating Officer/Executive VP
INTRODUCTION
° Transmission Control and Planning
-John Jonte, Reliant Energy Real Time Operations Licensee Perspective
- Dave Rencurrel,
- Steve Ellis, CP,
- Division Manager of STP Plant Operations Manager ES Plant Operations Manager
UmN TXU Offsite Power Requirements Evans Heacock STP Electrical Design Bases Engineer Ijaz Ahmad CPSES Electrical Design Bases Engineer
Offsite Power System TXU Bases e 10CFR50 Appendix GDC-17
- Capacity
- Capability
- Reliability A,
Offsite Power TXU 3TP System
"° ERCOT and TDSP Obligation
- To support plant licensing requirements
- To maintain plant voltage requirements
"° TDSP Procedures Incorporate
- Plant Acceptable Voltage Limits
- Plant Voltage Planning Contingencies
I TXU CPSES Offsite System Power L.
- Two Independent Sources
- 345 kV and 138 kV Switchyards
° Acceptable Voltages
- 345 kV System
- 138 kV System 340 to 361 kV 135 to 144 kV
- System Normal Frequency 60 + 0.1 Hz
STP Offsite Powe:r System
- Two Independent Sources
- Acceptable Voltages
- 345 kV System 347 to 369 kV
- System Normal Frequency 60+ 0.1 Hz
Offsite Power TXU a<
System
- Offsite Power Reliability
- Preferred source available normally
- Automatic transfer to other source
- Offsite sources highly Reliable
- Deregulation does not reduce reliability
EIR OT THE TEXAS CONNECTION Wholesale Market Operations Sam Jones ERCOT Chief Operating Officer/Executive VP
THE TEXAS CONNECTION The ERCOT Interconnection 75,479 MW of Generation 55,285 MW Peak in 2001 WSCC 57,644 MW Peak in 2000 37,000 miles transmission, 7,500 345 KV Intrastate Interconnection 2 HVDC Ties (820 MW) to Eastern Interconnect (SPP)
Provides Electricity to 85% of Texas One of Four Electric Interconnections in North America Texas PUC has Primary Jurisdiction 2
2
RECOT THE TEXAS CONNECTION ERCOT Control Center Two duplicate control centers
- Each control center with redundant systems
- 40 miles apart
- Staffed 24x7
- Capable of operating without off site power
- One will be hardened facility (Summer 2002)
- Redundant communication paths 3
THE TEXAS CONNECTION ERCOT Entities
"* Qualified Scheduling Entities (QSEs) - represent PGCs and LSEs to ERCOT; similar to former Control Areas
"* Power Generating Companies (PGCs) - entities that own generation assets
"* Load Serving Entities (LSE) - Entities that serve retail load.
Include Competitive Retailers (CRs) and Non-Opt In Entities (NOIEs)
"* Transmission and Distribution Service Providers (TDSPs)
Own and operate transmission andlor distribution systems; essentially same regulated companies as before
.All the above have signed agreements with ERCOT to comply with applicable Protocols and Operating Guides 4
THE TEXAS CONNECTION ERCOT Market L Schedules, Bids, RTU Data Energy Deployments Bid awards QSEs Load LSEs PGCs SCADA Dat; Outage Approval Switching RequestsJ Outage Requ Residential Commercial Commercial Industrial 5
,sts THE TEXAS CONNECTION 1
TDSPs Generation
THE TEXAS CONNECTION Elements of Meeting Electricity Requirements
- Base (bilateral) Energy Schedules
- Balancing Energy
- Ancillary Services (capacity that can provide energy)
ERcor THE TEXAS CONNECTION ERCOT Operations Communication with QSEs
"* Electronic Balancing deployment instructions (portfolio and unit specific) every 15 minutes - From ERCOT Ancillary service bid awards - From ERGOT Regulation Ancillary Service signals every 4 seconds - From ERGOT Base Energy Schedules - From QSEs Resource Plans - From QSEs Balancing Energy and Ancillary Service Bids - From QSEs Real time generation data - From QSEs
"* Telephone Verbal dispatch instructions - From ERGOT Hot Lines to TDSP and QSE for unusual operating situations - From ERGOT Miscellaneous information - QSEs and ERGOT 7
ERCOT THE TEXAS CONNECTION ERCOT Operations Communication with TDSPs
, Electronic SCADA data every 10 seconds - From TDSPs
- Transmission facility Outage Requests - From TDSPs
- Outage Approval/Denial - From ERCOT
- Telephone Verbal instructions - From ERGOT Hot Line for unusual operating situations - From ERCOT Miscellaneous information - TDSPs and ERCOT 8
ENaOT THE TEXAS CONNECTION Transmission Planning
- ERCOT works with Regional groups of TDSPs to determine future transmission needs
- ERCOT evaluates all Generation Interconnection Requests for new generation to determine what new construction and Special Protection Schemes are needed
- ERCOT has developed voltage and reactive standards and operating procedures for maintaining appropriate voltage profiles, including nuclear plant requirements 9
ERCOT THE TEXAS CONNECTION Black Start Plans
"* Black Start plans are being revised with TDSPs to replace those in effect prior to deregulation
"* Black Start resources have been selected and tested to verify compliance with requirements
"* Nuclear facilities continue to be considered critical loads in the plans 10
Communications John Jonte Reliant Energy, Division Manager of Real Time Operations
Real Time Communications Between Nuclear Plants and Transmission Operators
"* Voltage Monitoring and Control Normal voltage communications are routed through the QSE. If real time voltage moves outside prescribed limits, Plant Control Room is notified by the Transmission Operator.
"* Forced Outages The Plant Control Room is notified of transmission outages that relay out or that are forced out because of potential failure of the equipment and danger to personnel.
Implementing Planned Outages The Plant Control Room is notified of switching activities in the yard before the switching commences.
Real Time Communications Cont'd
- Emermency and Reliability Communication Path Various communications paths are available for communications between Plant Operators and the Transmission Operators.
Critical unit status changes such as "Mid-Loop" and other unit information are communicated this way.
Real Time Alarming Transmission voltage alarm limits are set more conservatively than nuclear plant requirements. TDSP, QSE, and ERCOT Operators take appropriate actions to prevent voltage levels from going outside plant design limits.
Short Term Planning Planned Outa2e Scheduling and Execution of Switching
- 1. Requesting party notifies TDSP of planned outage. TDSP performs studies and seeks concurrence with plant, if affected. If there is an operational conflict with the planned switching, the planned switching may be rescheduled.
- 2. TDSP submits requests to ERCOT and ERCOT perform studies of Planned Outages that may occur over the next several days. If contingency or voltage violations show up, the Planned Outage switching will not be approved.
- 3. Transmission Operators coordinate and control switching activities so that switching is done safely according to plan.
Long Term Planning Switchyard Committee
- Both plants have committees which meet periodically to discuss long-range needs of the switchyard based on studies, equipment problems, and upgrades.
Transmission Planning The TDSPs for both plants perform studies and take appropriate actions to ensure that substation fault duty, voltage profiles, transmission line capacity, system stability, and other components of the system are reliable and secure._
TXU Licensee Perspective David Rencurrel STP Operations Manager Steve Ellis CPSES Operations Manager
LicenseeTxu Z
Perspective
=TP Our Off-site Power Sources are RELIABLE
- ERCOT, TDSP, QSE understand our design requirements
- Our requirements are in protocols and formal agreements
- We will be notified of future grid changes or voltage studies
- Plant notified by TDSP and/or QSE of abnormal voltage conditions
Hierarchy of Grid Procedures
Licensee TXU 2<p Perspective 3TP Control room staff will respond to notifications of off-normal voltage
- control room indications will display real condition
- procedures are in place to direct operator action if telephone notification is received for abnormal voltage condition
- operators are trained on abnormal voltage conditions
- risk management tools are applied to grid activities that the switchyard
Licensee ATX Q
Perspective STPlP All parties will continue to communicate
- periodic voltage studies
- switchyard committee
- formal agreements
- periodic meeting of nuclear generators, TDSPs, QSEs, and ERCOT
'U
CONCLUSIONS
Electric Utility De-Regulation
"* CPSES and STP are Operating within their Design Basis with De-Regulation
"° ERCOT is Effectively Managing the Electric Grid - Highly Reliable Service, Knowledgeable on Nuclear Plant Issues, and Can Accommodate Future Changes
"* Communications Protocols are in Place to Deal with Short Term and Long Term Issues
QUESTIONS?
TXU Generation Company LP Electronic distribution from ADAMS by RIV:
Regional Administrator (EWM)
DRP Director (KEB)
DRS Director (ATH)
Senior Resident Inspector (DBA)
Branch Chief, DRP/A (DNG)
Senior Project Engineer, DRP/A (JMK)
Staff Chief, DRP/TSS (PHH)
RITS Coordinator (NBH)
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