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Edwin I. Hatch Nuclear Plant Edwin I. Hatch Nuclear Plant NRC Region II Status Meeting NRC Region II Status Meeting
August 15, 2007August 15, 2007Dennis Madison – Hatch Vice President
Steve Douglas – Plant Manager
Southern Nuclear Operating Company
Enclosure 2
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Agenda• Introduction• Hatch Project Overview
– Plant Performance– Site Vice President Reorganization
• Topical Updates• Major Projects
– Major Projects Underway– Recently Completed Projects
• Open Discussion
Enclosure 2
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Plant Performance
Enclosure 2
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August 7, 2007 Unit 2 Reactor Trip• I&C technician inadvertently tripped an overcurrent relay on
the normal incoming feeder breaker for “D” 4160 VAC bus during calibration
• Loss of this bus resulted in a loss of 2 condensate pumps and 2 booster pumps, as well as a recirc runback
• Plant scrammed on low reactor water level
• All systems responded as designed; no actuation of HPCI or RCIC
• Bus re-energized about 1.5 minutes from alternate source
• Breakdown in risk assessment process Enclosure 2
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Forced Loss Rate - Hatch
Forced Loss Rate
0.01.02.03.04.05.06.07.08.09.0
10.011.012.0
Jan06 Feb06 M ar06 Apr06 M ay06 Jun06 Jul06 Aug06 Sep06 Oct06 Nov06 Dec06 Jan07 Feb07 M ar07 Apr07 M ay07 Jun07
Cycle Based Averages (18 or 24 Months)
Per
cent
INPO 100% Performance Level Unit 1 - Monthly Cycle AvgUnit 2 - Monthly Cycle Avg Year End Goal LevelAction Level
Enclosure 2
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Industrial Safety - Hatch
Industrial Safety Accident Rate - Plant Value
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Jan06 Feb06 M ar06 Apr06 M ay06 Jun06 Jul06 Aug06 Sep06 Oct06 Nov06 Dec06 Jan07 Feb07 M ar07 Apr07 M ay07 Jun07
Cycle Based Averages (18 or 24 Months)
Indu
stria
l Saf
ety
Acc
iden
t Rat
e pe
r 20
0,00
0 H
ours
Wor
ked
INPO 100% Performance Level Industrial Safety Accident Rate (Cycle Based)Action Level
Enclosure 2
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NRC Performance Indicators - HatchNRC PI - Safety System Functional Failures
White > 6
Green ≤ 6
0
1
2
3
4
5
6
7
8
Safe
ty S
yste
m F
unct
iona
l Fai
lure
s
Jan-06 Feb-06 Mar-06 Apr-06 May-06 Jun-06 Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 May-07 Jun-07
12 Month Rolling Sum
White > 6 Green ≤ 6 Unit 1 Data Unit 2 Data Action LevelNote: Yellow/Red No Threshold
Enclosure 2
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Unit 1 HPCI
Enclosure 2
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Unit 1 RCIC
Enclosure 2
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Unit 2 HPCI
Enclosure 2
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Unit 2 RCIC
Enclosure 2
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NRC Performance Indicators - Hatch
NRC PI - Mitigating System Performance Index, Emergency AC Power System
Green ≤ 1.0E-06
White > 1.0E-06 OR
PLE = Yes
Yellow > 1.0E-05
Red > 1.0E-04
1.0E-07
1.0E-06
1.0E-05
1.0E-04
1.0E-03
Miti
gatin
g Sy
stem
Per
form
ance
Inde
x (M
SPI)
Valu
e
Jan-06 Feb-06 Mar-06 Apr-06 May-06 Jun-06 Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 May-07 Jun-07Rolling 36 Month Values
Green ≤ 1.0E-06 White > 1.0E-06 OR PLE = Yes Yellow > 1.0E-05Red > 1.0E-04 Unit 1 Data Unit 2 DataAction Level
Enclosure 2
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Emergency Diesel Generator
Enclosure 2
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NRC Performance Indicators - Hatch
NRC PI - Mitigating System Performance Index, High Pressure Injection System
Green ≤ 1.0E-06
White > 1.0E-06 OR
PLE = Yes
Yellow > 1.0E-05
Red > 1.0E-04
1.0E-07
1.0E-06
1.0E-05
1.0E-04
1.0E-03
Miti
gatin
g Sy
stem
Per
form
ance
Inde
x (M
SPI)
Valu
e
Jan-06 Feb-06 Mar-06 Apr-06 May-06 Jun-06 Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 May-07 Jun-07Rolling 36 Month Values
Green ≤ 1.0E-06 White > 1.0E-06 OR PLE = Yes Yellow > 1.0E-05Red > 1.0E-04 Unit 1 Data Unit 2 DataAction Level
Enclosure 2
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Site Vice President Reorganization
Enclosure 2
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J. B. BEASLEY, JR.Chairman,
President & Chief Executive Officer
K. S. KING CFO & Vice President
Corporate Services
M. M. CASTONGeneral Counsel,
VP External Affairs & Corporate Secretary
W. L. BARGERONPlant Manager
J. D. WILLIAMSSite Support
Manager
W. D. DRINKARDQuality Assurance
Manager
M. J. AJLUNISite Support
Manager
*SCS Employee
Site Vice President Reorganization – January 2007
0407
R. A. BELL*Human Res. Sr. VPSouthern Company
D. R. MADISONVice President - Hatch
J. R. JOHNSONVice President - Farley
T. E. TYNANVice President - Vogtle
T. L. YOUNGBLOODSite Support
Manager
C. R. DEDRICKSONPlant Manager
S. M. DOUGLASPlant Manager
S. A. MITCHELLAsst. Corp. Sec./Exec.
Asst. to Pres./Asst. Treas.
P. R. BIZJAKSafety & Health
Manager
C. D. COLLINSSupply Chain
General Manager
VACANT *H. R. Director
J. G. WOLFEComptroller &
Treasurer
J. T. GASSERExecutive Vice President & Chief Nuclear Officer
A. F. THORNHILLManaging Atty. &
Compliance Manager
C. H. PHILLIPSPublic Affairs Manager
J. M. GODFREYEnvironmental Affairs
Manager
W. H. LEEEmergency Planning
Supervisor
J. A. MILLERSenior Vice PresidentNuclear Development
D. P. BURFORDNuclear Fleet Security
and Emergency Preparedness Manager
Vogtle 3&4
Bellefonte
D. H. JONESEngineering
Vice President
W. L. BURMEISTER
Plant Support Manager
A. HARRISEngineering
Services Manager
G. K. McELROYEngineering Admin. Services Manager
J. B. PAPPASConfiguration
Management Manager
B. E. HUNTNuclear Fuels
Manager
B. J. GEORGENuclear Licensing
Manager
W. B. THIGPENSecurity
Supervisor/Access Authorization
P. A. HURSTCorporate Concerns
Supervisor
L. M. STINSONFleet Operations Support
Vice President
Enclosure 2
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Fleet Operations Support (proposed)Fleet Ops VP
FleetOperations
Manager
Fleet Maintenance / WC Manager
Fleet Outage Manager
Assistant
Fleet Chem / HP Manager
Fleet Security &EP Manager
Fleet Training & PI Manager
OperationsStaff
Maintenance/WC Staff Outage Staff HP Staff ***
Chem Staff * SecuritySupervisor
EPSupervisor
Security Staff EP Staff
NFSCoordinator Admin Asst Admin Asst *
TrainingSupervisor *
Instructors /Staff * / **
PI Staff
CAPCO
* Transfer from Engineering
** Transfer from Supply Chain
*** Transfer from Environmental
Enclosure 2
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Site Engineering (proposed)
Site VP
Plant Mgr. Engineering Mgr. *** Site Suppt. Mgr.
Design Engineering Support
Modifications PMMS
*Mech & CivilDesign
*Elec/I & CDesign
Nuc. Systems Programs
BOP Systems Elec./I & C
Admin. Asst PerformanceImprovement
Principal Engineer –Licensing **
Equipment Reliability
New or Modified Org.
*EFIN •Design Chg. (Corp) •Mech/Civil (Corp)•Elec/I &C (Corp)
**Dotted line reporting to Corporate Licensing
*** Dotted line reporting to Chief
Engineer
Enclosure 2
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Topical Updates
Enclosure 2
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SNM Update
• Procedure revisions implemented to upgrade SNM accountability practices for in-core detectors following conclusion of SNM retrieval activities last year
• Initial results indicated that 4 in-core detectors were not at the location specified
• All 4 detectors were subsequently located and accounted for
• Fuel pool legacy cleanup scheduled 3rd/4th quarter 2007
Enclosure 2
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Tritium Sampling
• Update on tritium graphs (T12, NW10, N008A)
• Mactec Status – Phase 2 Report (2007)
– Complete hydrology study (determine need)
• Unit 2 CST pipe Replacement Update
Enclosure 2
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Tritium Sampling
SAMPLE WELL T12
1.00E+03
1.00E+04
1.00E+05
1.00E+06
1.00E+07
Feb-03
May-03
Aug-03Nov-03Mar-0
4Jun-04Sep-04Jan-05Apr-0
5Jul-0
5Oct-0
5Feb
-06May-0
6Aug-06Dec-06Mar-0
7Jun-07
H3 p
Ci /
L
T12
Enclosure 2
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Tritium Sampling
Tritium Outfall Sample (Subsurface drain N008A)
1.00E+03
1.00E+04
1.00E+05
05/01 /06
07/01 /06
09/01 /06
11/01 /06
01/01 /07
03/01 /07
05/01 /07
07/01 /07
H3
pCi /
L
1Y22N008A
Enclosure 2
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Tritium Sampling
SAMPLE WELL (NW10)
1.00E+043.00E+045.00E+047.00E+049.00E+041.10E+051.30E+051.50E+051.70E+05
10/9
/200
6
11/9
/200
6
12/9
/200
6
1/9/
2007
2/9/
2007
3/9/
2007
4/9/
2007
5/9/
2007
6/9/
2007
7/9/
2007
8/9/
2007
H3
pCi/
L
NW10
Enclosure 2
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1A RHR Pump Vibration
• Vibration observed on 1A RHR pump only during two pump flow in Division 1 (Pumps A & C)
• Occurs only in loop flow range of 4000 – 6000 gpm
• Cause of vibration has not been determined
• Conceptual design being developed to increase natural frequency of the loop
Enclosure 2
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Alternative Source Term
• Full scope AST analysis submitted to NRC 8/29/2006
• Addresses control room inleakage concerns of Generic Letter 2003-01
• Control room inleakage testing showed good results, well within interim licensing basis limits
• Approval of AST submittal required by 5/31/2010
• Significant interdisciplinary review at NRR is in progress
• Planned and potential modifications to support AST are scheduled to complete by spring 2010
Enclosure 2
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Staffing• Pipeline Replenishment
– Strategies for hiring entry level workers and engineers
– License classes
• 8 candidates to finish this December
• 10 SRO candidates started June 2007
• 16 candidates to start March 2008
• 16 candidates to start March 2009
• Average class size of 16
– All other initial programs up and running (Chemistry, HP, Maintenance, etc.)
Enclosure 2
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Steam Chase Grating Analyses
• Tool boxes were staged over grated vent openings between Reactor Building steam pipe chase and torus room
• Hinged vent covers were strapped to vent grating on Unit 2
• Tool boxes were removed from grating on both units and strap was removed on Unit 2
Enclosure 2
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Tool Box
Enclosure 2
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Steam Chase Grating Analyses• Unit 1 limiting parameter is differential pressure on wall
between torus room and ECCS pump rooms• Unit 1 analysis demonstrated that as-found vent paths
provided adequate opening to meet differential pressure limits• Unit 2 limiting parameter is differential pressure on wall
between torus room and reactor building ground level floor• Unit 2 analysis is at the preliminary results stage (not
checked)• Preliminary results indicate that correcting for mass flow
conservatisms will result in differential pressures within the analyzed limits
Enclosure 2
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TSC HVAC Availability
• Event represents good incorporation of corrective actions from 2005 TSC white finding
• EP and work planning personnel discussed work activity during planning phase
• Work was placed on hold when first phase took longer than expected so issue could be discussed with NRC Region II personnel
• Region II provided timely feedback regarding SNC’s planned course of action
Enclosure 2
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Planned Major Projects
Enclosure 2
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Unit 1 Main Transformer Replacement
• Unit 1 Main transformer replacement (2008)– Asset management/Life Cycle management
– Replaces leased Alabama Power transformer with permanent transformer
– Spare transformer delivered early 2008 for infant mortality issue
– New transformer good to end of plant life
Enclosure 2
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Shroud Tie Rod Upper Restraints
• Unit 1 Shroud tie rod upper restraint replacement (2008)
• Unit 2 Shroud tie rod upper restraint replacement (2009)– Equipment reliability/safety
– Replaces upper supports with larger components to remove susceptibility to IGSCC
– Restores to BWRVIP criteria for repaired shrouds
– Eliminates need to re-inspect shroud horizontal welds
– Licensing submittal for Unit 1 has been issued
Enclosure 2
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Condenser Bypass Sparger Replacement
• Unit 1 and Unit 2 Condenser bypass sparger replacements (Unit 1 in 2008. Unit 2 in 2009)– Replaces degraded bypass spargers
– Spargers currently limit Operations use of bypass (i.e., length of time in Hot shutdown)
Enclosure 2
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Adjustable Speed Drives
• Adjustable speed drives (Unit 1 in 2010 and Unit 2 in 2011)– Asset management/Life Cycle management
– Replaces the Recirculation M-G sets with Variable Frequency drives
– Eliminates Recirculation flow step changes from fluid coupling positioner
– Does not eliminate step changes from Bi-stable flow
– Equipment reliability
Enclosure 2
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Feedwater Sparger End Pins
• Feedwater sparger end pin replacement (Unit 1 in 2008, no Unit 2 installation)
• Remote tooling will allow the installation of the Feedwater Sparger End Pins simultaneously with other work activities on the refueling floor
Enclosure 2
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Completed Major Projects
Enclosure 2
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Mark VI Turbine Controls
• Unit 1 and Unit 2 Mark VI Turbine Controls– Completed on both units
– Asset management/Life Cycle management
– Installs triple redundant digital controls
– Replaces obsolete Mark I control system
Enclosure 2
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Unit 2 Generator Exciter Controls
• Unit 2 Generator Exciter Controls – Completed on Unit 2 – Unit 1 to complete in 2008)
– Asset management/Life Cycle management
– Replaces obsolete exciter with EX 2100 alterex
Enclosure 2
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Condenser Bellows Replacement
• Unit 1 and Unit 2 Condenser Bellows Replacement– Completed on both units
– Equipment reliability – Industry OE
– Replaced bellows that were beyond design life
Enclosure 2
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Unit 1 Drywell Cooler Replacement
• Unit 1 Drywell Cooler Replacement– Equipment reliability
– 2005 shutdown due to drywell leakage and containment integrity issue (leak from drywell into cooler)
– Replaced all 16 Drywell cooler coils
Enclosure 2
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Open Discussion
Enclosure 2