ML15261A135
| ML15261A135 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 03/25/1997 |
| From: | Christensen H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Hampton J DUKE POWER CO. |
| References | |
| NUDOCS 9704170141 | |
| Download: ML15261A135 (31) | |
Text
March 25, 1997 Duke Power Company ATTN:
Mr. J. W. Hampton Vice President Oconee Site P. 0. Box 1439 Seneca, SC 29679
SUBJECT:
MEETING
SUMMARY
- SERVICE WATER PROJECT STATUS OCONEE NUCLEAR STATION
Dear Mr. Hampton:
This refers to'a meeting conducted at your.request on March 20, 1997, in Atlanta, Georgia. The purpose of the meeting was to discuss the status of the Service Water Project at the Oconee Nuclear Station. The meeting was beneficial in describing the status of modifications being performed.
Enclosed is a List of Attendees and a copy of the Service Water Project Status Meeting Handout.
In accordance with Section 2.790 of the NRC's "Rule of Practice," part 2 Title 10 Code of Federal Regulations, a copy of this letter and its enclosures will be placed in the NRC Public Document Room.
Should you have any questions concerning this letter, please contact us,.
Sincerely, Original signed by Harold 0. Christensen Harold 0. Christensen, Chief Engineering Branch Division of Reactor Safety Docket Nos. 50-269, 50-270, 50-287 License Nos.. DPR-38, DPR-47, DPR-55
Enclosures:
- 1. List of Attendees
- 2. Service Water Project Status Meeting cc w/encls:
(See page 2) 9704170141 970325 PDR ADOCK 05000269 P
DPC 2
cc w/encls:
Mr. J. E. Burchfield Compliance Duke Power Company P. 0. Box 1439 Seneca, SC 29679 Mr. Paul R. Newton Legal Department (PB05E)
Duke Power Company 422 South Church Street Charlotte, NC 28242-0001 Mr. Robert P. Gruber Executive Director Public Staff - NCUC P. 0. Box 29520 Raleigh, NC 27626-0520 Mr. Robert B. Borsum Framatome Technologies 1700 Rockville Pike, Suite 525 Rockville, MD 20852 Mr. J. Michael McGarry, IlI, Esq.
Winston and Strawn 1400 L Street, NW Washington, D. C. 20005 Dayne H. Brown, Director Division of Radiation Protection N. C. Department of Environmental Health & Natural Resources P. 0. Box 27687 Raleigh, NC 27611-7687 Mr. Max Batavia, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, SC 29201 (cc w/encls cont'd)
- 3.
(cc w/encls cont'd)
County Supervisor of Oconee County Walhalla, SC 29621 Manager, LIS NUS Corporation 2650 McCormick Drive Clearwater, FL 34619-1035 Mr. G. A. Copp Licensing - ECO50 Duke Power Company P. 0. Box 1006 Charlotte, NC 28201-1006 Ms. Karen E. Long Assistant Attorney General N. C. Department of Justice P. 0. Box 629 Raleigh, NC 27602 Distribution w/encls:
D. LaBarge, NRR R. Carroll, RII C. A. Casto, RII N. Economos, RiI R. Baldwin, RII PUBLIC OFFC RILDRS RIIDRP SIGNATURE NAME RM ore:pd CCasto DATE 0O
/ 97 03
/ / 97 03 /
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(YES NO Y
YES NO YES NO YES NO YES NO UULUMElIl NAME:
S:\\bkS\\EB\\UCOSUM.RR LIST OF ATTENDEES Duke Power Company J. Hampton, Vice President, Oconee Nuclear Plant (ONP)
L. Azzarello, Engineering, ONP E. Burchfield, Regulatory Compliance Manager, ONP B. Foster, Safety Assurance, ONP J. Davis, Engineering Manager, ONP D. Nix, Regulatory Compliance, ONP NRC J. Jaudon, Director, Division of Reactor Safety (DRS), RII R.,Carroll, Project Engineer, Branch 1, Division of Reactor Projects (DRP), Ru C. Casto, Chief, Reactor Project Branch 1, DRP, RII H. Christensen, Chief, Engineering Branch (EB), DRS, RII W. Rogers, Senior Reactor Analyst, R1I M. Scott, Senior Resident Inspector, R1l
O f"e ude Oconee Nuclear Station Service Water Project Status Meeting March 20, 1997 Oconee Nuclear Station
Introduction
- Project larger than anticipated
- Forced outages diverted workforce Dedicated project team in place
- Objectives will be met on Unit 2 Tech Spec to address Unit 2
- Units 1 & 3 will operate under current licensing basis until refueling outages in 1998
- Reliability enhanced on all three units Oconee Nuclear Station 2
Agenda
- Historical Perspective
- Key System Characteristics
- Modification Overview Current Status
> Organization
>> Scope/Schedule NRC Interaction Conclusions Oconee Nuclear Station
Historical Perspective Service Water System Reviews from 1987 to 1994 Culminated in Current Modification effort:
>> 1987 Internal Low Pressure Service Water (LPSW) Self Initiated Technical Audit (SITA)
>> 1993 Inspections by NRC Resident Inspectors
>> 1993-1994 NRC Service Water System Operational Performance Inspection (SWSOPI)
Oconee Nuclear Station 4
Historical Perspective Service Water open items fi-o these reviews fell into three major categories:
> LPSW System dependence on High Pressure Service Water (HPSW) System
>> Net Positive Suction Head (NPSH) for LPSW pumps
>> QA classification of Structures, Systems, and Components (SSCs) supporting operability of LPSW System Oconee Nuclear Station
Historical Perspective
- NRC/Duke Meeting on February 24, 1995 to Discuss Outstanding SWSOPI Issues NRC/Duke Meeting on November 1, 1995 to Present Revised Conceptual Design Comprehensive Preliminary Design Description Letter Submitted by Duke on December 28, 1995 NRC Provided General Concurrence to Service Water Design Description in Letter Dated July 2, 1996 Oconee Nuclear Station 6
Historical Pers ective
- First Tech Spec Change associated with Service Water modifications approved August 19, 1996 Closure of all NRC open items and tracking under new IFI 96-13-03 Duke letter regarding schedule for completion of Service Water Project on October 28, 1996 Oconee Nuclear Station 7
"0 V ER 0
Key System Characteristics.
Key Condenser Circulating Water (CCW)0 Characteristics
>> During normal operation, CCW provides forced flow for condenser cooling and LPS.W pump suction
>> Portion of CCW, called Emergency CCW, supplies suction to LPSW during certain Design Basis Events
>> ECCW flow maintained by siphon
> Bounding event for this function is LOCA/LOOP Oconee Nuclear Station
0 -13, E S MM-7 e
0
.. Key System Characteristics e Key LPSW Characteristics
> Units 1 & 2 Share three pumos, Unit 3 has two pumps
> Takes suction from CCW Crossover Header
>> LPSW pumps and certain LPS W valves receive an Engineered Safeguards (ES) signal.
Oconee Nuclear Station 9
Modification Overview Objectives of Service Water Modifications:
>> Eliminate dependence on HPSW System
>> Assure NPSH for LPSW Pumps under all Design Basis Accident conditions
>> Upgrade QA Condition of SSCs needed for LPSW operability Oconee Nuclear Station 0
Modification Overview Major Parts of Service Water Modification:
>> QA-1 sealing/cooling water supply to CC W pumps
>> QA-1 Vacuum System to maintain ECCW siphon indefinitely
>> Configuration changes to LPSW System
>> Upgrade QA Condition of certain SSCs required to maintain s iphon.
Oconee Nuclear Station
Modification Overview QA-1 Siphon Seal Water (SSW) to CCW pumps and motors from LPSW System
>> New flowpath from LPSW to CCW Pumps
>> Eliminate dependence on HPSW Oconde Nuclear Station 12
IR (0 Modification Overview New QA-1 Essential Siphon Vacuum (ESV)
System to increase reliability of ECCW siphon supply to LPSW
>> Draws continuous vacuum on CCW inlet headers
>> Ensures siphon effect maintained indefinitely Oconee Nuclear Station 13
Modification Overview ud e LPSW configuration changes
> Control system demand
> Ensure adequate NPSH under all conditions Oconee Nuclear Station
%OVh)
EIR 0
modification Overview Upgrade QA classification of SSCs required to maintain the ECCW siphon
>> Upgrade the control circuitry for CCW pump discharge valves
>> Replace gear boxes on CCW pump discharge valves
>> Reclassify and upgrade the design of the siphon pressure boundary Oconee Nuclear Station 15
I6V1 ER Current Status
!fud Organization
>> Dedicated Project & Leadership Team in place
>> New, detailed schedule completed, based on implementation needs Oconee Nuclear Station 16
Current. Status
- By end of Unit 2 EOC 16 Refueling
> Two redundant safety-related siphon sources feeding all three units' LPSW from Unit 2 CCW
>> Configuration changes to LPSW System for Units 1, 2, and 3
>> Operational and fully tested Oconee Nuclear Station 17
Current Status
- Modification Parts Completed To Date.
Includes:
>> Remove ES Signal from 3LPSW-4,-5
>> Install LPSW Pump Minimum Recirc Piping on Unit 3
> Install Minimum Recirc Flow Element on Unit 3
>> Move 3LPSW-139 Control Switch into Control Room
>> Install Trenches in Dike
>> Two wet taps in Turbine Building Oconee Nuclear Station 18
Current Status Additional Modification Parts to be Completed During Current Innage.
Includes:
> ESV Pad, Building, & Misc. Equipment
>> SSW headers to ESV Building, CCW pumps
>> Electrical Cable Trench & Conduit Bank
> ESV headers from Building to CCW inlet pipe Oconee Nuclear Station 19
Current Status Modification Parts to be Completed During Unit 1 Outage (8/97). Includes:
>> Remove ES Signal from 1LPSW-4,-5
>> Install LPSW Pump Minimum Recirc. Piping & Flow Element
>> Install New LPSW-139 for Unit 2
>> Move 1 LPSW-139 Control Switch into Control Room
>> Install New LPSW Pump Impellers Oconee Nuclear Station 20
Current Status Modification Parts to be Completed During Next Innage. Includes:
> SSW Lines from Unit 1&2 LPSW
>> SSW Line Instrumentation in Turbine Building.
>> ESV Pumps, Tanks, Valves, Power & Instrumentation
>> Upgrade QA Condition of Siphon Pressure Boundary
>> Upgrade QA Condition of RWF Trench
>> New Chiller Piping, Booster Pumps & Power Oconee Nuclear Station 21
Current Status Modification Parts to be Completed During Unit 2 Outage (2/98). Includes:
>> Remove ES Signal from 2LPSW-4,-5
>> Move 2LPSW-139 Control Switch into Control Room
>> Upgrade Unit 2 CCW Valve Control Circuitry
>> ESV Tie-ins to Unit 2 CCW Inlet Lines
>> SSW Tie-ins to Unit 2 CCW Pumps
>> Flow, Level Instrumentation, Heat Tracing Oconee Nuclear Station
~O1V EIR...
Current Status Items Planned for Completion by End of Following Unit 3 and Unit 1 Refuelings. Includes:
>> SSW tie-ins to Unit 1 and 3 CCW pumps
>> Isolation of HPSW tie-ins on Units 1 and 3
>> ESV tie-ins for Units 1 and 3 Unit 3 Work Completed Third Quarter 1998
- Unit 1 Work Completed First Quarter 1999 Oconee Nuclear Station 23
NRC Interaction
-License Amendment on Turbine-Generated Missiles.
Proposed Tech Specs to Address ESV and ECCW Systems Oconee Nuclear Station 24
NRC Interaction License Amendment on Turbine-Generated Missiles
> Submittal scheduled by 7/97
>> Need approval of application of SRP methodology for missile protection to new design
>> Will require license amendment approval and revision to UFSAR
>> Wi ll request NRC approval by 2/98 Oconee Nuclear Station 25
NRC Interaction Proposed Technical Specifications to Address ESV and ECCW Systems
>> Perform Service Water Modifications under 50.59
>> Submit ESV/ECCW Tech Specs for Unit 2 to NRC by 9/97
>> Will request NRC.approval by 2/98
>Upon approval of Tech Specs, place new Service Water functions into operation for Unit 2
>> Operate Units 1 and 3 under existing SLCs until upgraded
>> Phase in ESV/ECCW Tpech Specs for Units 1 and 3
>> Updated description of modification in Tech Spec submittal Oconee Nuclear Station
.26
&Conclusions Committed to Completing Service Water Upgrade Scope and Schedule are Well Defined Licensing Basis of New Design will be Well Defined Operability Requirements will be Addressed in Tech Specs New Design to be Verified by Integrated Testing 0
Will Enhance Level of Safety of Plant Oconee Nuclear Station 27