Transcript 슬라이드 제목 없음 - tier.org.tw

Earthquake Monitoring System
for Power Facilities in Korea
Sep. 3, 2003
Presented by Jong-Rim LEE
Korea Electric Power Research Institute, KEPCO
Presentation Topics

Introduction

Earthquake Monitoring System
 for Nuclear Power Plants
 for Fossil Power Plant & Pumped Storage Hydroelectric Power Plants
 KEPRI EMC (Earthquake Monitoring Center)

Early Warning System
 Earthquake occurrence information by SMS (Short Message Service)
 Establishment of KISS (Korea Integrated Seismic System)
 Rapid Earthquake Damage Evaluation Program
 Earthquake Damage Assessment Program for NPP Containment Structure

Conclusion and Future Plan
Introduction
 Is the Korean Peninsula safe enough from Earthquake ?

Historical records ( AD 2 - 1904 )
YY/MM/DD MMI YY/MM/DD MMI YY/MM/DD MMI
27/12/??
9
1405/03/12
9
1613/07/16
8
89/06/??
9
1436/05/29
9
1643/07/24
9
304/09/??
9
1455/01/24
9
1670/10/30
8
510/05/??
9
1518/07/02
9
1681/06/12
8
779/03/??
9
1593/10/08
8
1700/04/29
8
1036/07/23
9
1594/11/20
8
1810/02/19
9
 Quite
a few severe earthquakes occurred
Epicenters of historical earthquake
( by KIGAM Web Site )
Introduction (cont.)

Instrumental records since 1905
1936/06/04 (ML=4.8)
1978/10/07 (ML=5.0)
1981/04/15 (ML=4.8)
1996/12/26 (ML=4.5)
2003/03/29 (ML=4.9)

Ssanggesa earthquake
Hongsung earthquake
Pohang earthquake
Yeongweoul earthquake
Jindo earthquake. Etc.
Frequency rate of earthquake occurrence
(since 1978)
(Frequency)
60
50
40
30
20
10
0
78 80
82 84 86 88
90 92
94 96
98 00 02
Epicenters of instrumental earthquake
(by KIGAM Web Site)
Introduction (cont.)
 Lessons learned from Kobe & Chi-Chi earthquakes
 To minimize earthquake damage for power facilities
 Systematic preventive system is required
 Objectives of establishing earthquake monitoring system
for power facilities
 Real time earthquake monitoring and analysis
 Immediate post-earthquake safety evaluation
 Verification of the aseismic safety of structure and equipment
Earthquake Monitoring for NPP Sites (1)
 Objectives
 Development of seismic safety-related technologies
 Post-earthquake procedure for NPP
 Seismic design considering site-specific geological & seismological characteristics
(by 10 CFR Part 100, Subpart A, B)
 Obligation of seismic monitoring system for new NPPs (by R.G. 1.165)
 Derivation of attenuation formulas and site specific response spectra etc.
 Evaluation of fault activity and seismic data acquisition
 Distribution of earthquake data
 Establishment of integrated seismic assessment programs
Earthquake Monitoring for NPP Sites (2)
 Location
: 13 stations in and around NPP sites
• Kori : 1 (4)
• Wolsung : 1 (3)
• Younggwang : 1 (1)
• Uljin : 1 (1)
KEPCO
Uljin NPP
KEPRI
Yeonggwang NPP
Wolsung NPP
Kori NPP
KEPRI Earthquake Observatory Station
Earthquake Monitoring for NPP Sites (3)
 Instrumentation
• Dual Sensor (Seismometer, Strong Ground-Motion Sensor)
- Seismometer (Short period) : Observation of local earthquake
- Strong Ground Motion Sensor (Accelerometer)
: Recording strong ground motion which is beyond capacity of seismometer
• Recorder(24 bit A/D board), Communication Equipment
Strong GroundMotion Sensor
Seismometer
Recorder
Earthquake Monitoring for NPP Sites (4)
 Data Transmission
KEPRI EMC
100 Mbps
100 Mbps
56 Kbps
(leased line)
KIGAM
(Router)
T1(1.5 Mbps)
Dial-up
station
(Router)
10 Mbps
10 Mbps
(leased line)
KISS
server
Earthquake Monitoring for Fossil &
Hydroelectric Power Plants (1)
 Objectives
 Re-examination of aseismic design
 Instruction by Ministry of Commerce, Industry and Energy
 Assessment of aseismic performance of major structures in fossil
& hydroelectric power plants
 Post-earthquake procedures for fossil & hydroelectric power plants
Earthquake Monitoring for Fossil &
Hydroelectric Power Plants (2)
 Location
: 12 monitoring system
• 9 Fossil Power Plants
- Free field
- Upper/lower boiler building
• 3 Pumped-Storage Power Plants
- Free field
- Upper/lower Dam
KEPCO
KEPRI
KEPRI Earthquake Observatory Station
Earthquake Monitoring for Fossil &
Hydroelectric Power Plants (3)
 Instrumentation
• Strong Ground Motion Sensor (Accelerometer)
• Recorder
- Free field : Q330
- Structure : Autosys (Developed by KEPRI)
• Communication Equipment
- MDSL (Multi-rate Digital Subscribe Line) equipment, etc.
Strong GroundMotion Sensor
Recorder (Q330)
Recorder (Autosys)
Earthquake Monitoring for Fossil &
Hydroelectric Power Plants (4)
 Data Transmission
MDSL
HUB
MDSL
Top of the
boiler building
Recorder
Basement of the
boiler building
MDSL
MDSL
Recorder
MDSL
MDSL
Recorder
MDSL
MDSL
Server of Fossil
KEPRI EMC
Power Plants
Free filed
Top of the Dam
MDSL
MDSL
Recorder
Basement
of the Dam
Recorder
Tunnel
HUB
Server of
PumpedStorage
Hydroelectric
Power Plants
MDSL
MDSL
Recorder
MDSL
MDSL
Recorder
Free filed
KEPRI EMC (Earthquake Monitoring Center)-(1)
 Automatic Analysis Process
Acquisition of seismic data
Real time data monitoring
& data transmitting
Management of seismic data
Automatic analysis & interpretation
Interactive data analysis
Data archiving
Applied to research work
KEPRI EMC (Earthquake Monitoring Center)-(2)
 Data Transmission to MCR of NPP in real time
(Earthquake monitoring)
0.001621g
0.000061g
0.001964g
(Map of epicenter & PGA value)
SMS (Short Message Service)
 Objectives
• To inform severe earthquake occurrence
within seconds to the researchers
via the cellular phone
• In case that
- ground motion level exceeds 1/1000g
- magnitude of earthquake > 4.0
KMA Earthquake Alarm Service
 Objectives
: Automatically receiving the information of earthquake occurrence
(Especially, warning for felt earthquake occurrence)
KISS (Korea Integrated Seismic System) - (1)
 What is KISS ?
• A set of network program and hardware system
• Similar to LISS (Live Internet Seismic Service) of Albuquerque
Seismological Laboratory in USA
 Objectives
: Sharing earthquake data with KEPRI, KMA, KIGAM, KINS, Universities
Establishment of a nationwide seismic network & D/B
Using earthquake data efficiently
Reducing damage due to an earthquake disaster
KISS (Korea Integrated Seismic System) - (2)
• Seismic Network of Korea
KEPRI
KMA
KIGAM
KINS
BROAD BAND
SHORT PERIOD
Only ACCEL.
ARRAY
BORE HOLE
(by Lee, H.I. et al., 2002)
KISS (Korea Integrated Seismic System) - (3)
• Schematic diagram of KISS
KIGAM
Station
Buffer
Station
KISS
Buffer
KEMS
KEMS
KISS
Server
KINS
Station
Buffer
KISS
KMA
Station
KISS
Buffer
KEMS
KISS
Antalope
KEPRI
Station
Buffer
KISS
KEMC
( by Lee, H.I. et al., 2002 )
Rapid earthquake damage evaluation system (1)
• Schematic diagrams of earthquake processing & reporting system
Earthquake Automatic Processing System
Data
transmission
Earthquake
parameter
determination
Automatic
processing
Propagation Velocity
Earthquake
wave
transmission
P-wave arrival
S-wave arrival
Rapid Earthquake Damage Evaluation System
Data
transmission
0sec
Analysis of
rapid
evaluation

Rapid reaction
(Alarm)
Analysis of
damage evaluation
Confirmation
Reporting
Rapid earthquake damage evaluation system (2)
 Objectives
: Visualization of spatial ground motion measurements in real time
 Procedure
Transferred 20 sps data
into KISS server
in real time
Drive out DSS data
from 20 sps data
Visualize the damaged area
with intensity
Real time 2-D
visualization of
ground motion
Spatially irregular PGA data
: interpolation
Rapid earthquake damage evaluation system (3)
• DSS (Data Subscription Service) data
: The pre-assigned request for the earthquake observatory stations to send
very limited brief data with minimized transmission load and time
• PGA Monitoring
1 sec
2000
Using DSS Data
Max.
To remove DC drifting
Digit value
1000
Average
Moving Average Method : AV
DC drifting
0
Max. value (EWmax, NSmax)
Min.
from
|Max -AV|, |Min-AV|
-1000
0
20
40
60
NumberofSamples(20sps)
80
100
120
PGA = [(EWmax)2+(NSmax)2]
Rapid earthquake damage evaluation system (4)
(An example of rapid earthquake damage evaluation system by Chi, H.C. et al., 2002 )
Seismic Damage Assessment Program (1)
 Objectives
: Analyze in real time the actual seismic resistance capacity and the
damage level of containment structures
Establishment of 3-D
Inelastic Seismic
Analysis Techniques
Development of
Damage Assessment Methods
under Seismic Events
3-D Graphic
Representation
Program
Development of 3-D
Inelastic Seismic
Analysis Program
Construction of
Seismic Damage
Assessment
System for
Containment
Structures
Earthquake Damage Assessment Program (2)
• Seismic Damage Assessment Procedure
Earthquake Event
3-D Inelastic Seismic Analysis
considering Aging Degradation
Estimation of Damage Level
Site Inspection
Safety Evaluation of
Containment Structures
(An example of damage evaluation program by Koh, H.M. et al., 2003 )
Conclusion and Future Plan (1)

To assess the safety of power facilities against an earthquake
 Earthquake observatory stations installed 13 for NPPs,
12 for fossil & hydroelectric power pants

Additional earthquake observatory stations are to be installed
step by step
 For the rest of fossil, hydroelectric power plants & 765 kV
substations
Conclusion and Future Plan (2)

Accumulated earthquakes data are
 basic data for building up a system which enables to assess and
predict damage to the structural integrity of power facilities
 used to develop the response spectra in consideration of
geological and seismological characteristics of NPP site
 useful for a nationwide earthquake mitigation plan with KISS