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

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

Plant Performance

Enclosure 2

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

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

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

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

Unit 1 HPCI

Enclosure 2

Unit 1 RCIC

Enclosure 2

Unit 2 HPCI

Enclosure 2

Unit 2 RCIC

Enclosure 2

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

Emergency Diesel Generator

Enclosure 2

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

Site Vice President Reorganization

Enclosure 2

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

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

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

Topical Updates

Enclosure 2

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

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

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

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

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

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

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

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

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

Tool Box

Enclosure 2

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

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

Planned Major Projects

Enclosure 2

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

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

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

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

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

Completed Major Projects

Enclosure 2

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

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

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

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

Open Discussion

Enclosure 2