Text

Seismic Walkdown Information Request for Information Pursuant to Title 10 of Code of Federal Regulations Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review of Insights from Fukushima Dai-ichi Accident 3/12/12
	ML12347A252
Person / Time
Site:	Oconee
Issue date:	11/27/2012
From:	Gillespie T; Duke Energy Carolinas
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	Download: ML12347A252 (127)
	v • d • e

T. PRESTON GILLESPIE, Jr.

D key Vice President Oconee Nuclear Station Duke Energy ON01 VP / 7800 Rochester Hwy.

Seneca, SC 29672 864-873-4478 864-873-4208 fax T.Gillespie@duke-energy.com November 27, 2012 10 CFR 50.54(0 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852

Subject:

Duke Energy Carolinas, LLC (Duke Energy)

Oconee Nuclear Station (ONS), Units 1, 2 and 3 Docket Nos. 50-269, 50-270, and 50-287 Seismic Walkdown Information Requested by NRC Letter, Request for Information Pursuantto Title 10 of the Code of FederalRegulations 50.54(0 Regarding Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichiAccident; dated March 12, 2012

Reference:

1. NRC Letter, Request for Information Pursuantto Title 10 of the Code of FederalRegulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident, dated March 12, 2012

2. EPRI 1025286, Seismic Walkdown Guidance for Resolution of Fukushima Near-Term Task Force Recommendation 2.3: Seismic, Final, dated June 2012 On March 12, 2012, the NRC staff issued a Request for Information in accordance with 10 CFR 50.54 (Reference 1). Enclosure 3 of Reference 1 contains specific requests associated with Recommendation 2.3 for Seismic Walkdowns, which required a written response to be submitted within 120 days.

Duke Energy submitted its response on July 9, 2012, which in part, confirmed that Duke Energy would use the NRC endorsed industry guideline, EPRI 1025286 (Reference 2), as the basis for performing Seismic walkdowns at the Oconee Nuclear Station (ONS). Based on the date EPRI 1025286 was endorsed, May 31, 2012, and the schedule presented in Reference 1, the report associated with the seismic walkdowns at ONS is to be submitted to the NRC by November 27, 2012.

Enclosures 1, 2, and 3 contain the seismic walkdown reports for ONS Units 1, 2, and 3 respectively, and address the information request from Reference 1, as outlined in Section 8 of EPRI 1025286. Each of these enclosures includes an Attachment 5 which contains information that is Security-Sensitive. These attachments are requested to be withheld from public disclosure in accordance with 10CFR 2.390(d)(1).

Attachment 5 of Enclosures 1,2 and 3 Contains Security-Sensitive Information -

1J Withhold From Public Disclosure Pursuant to 10 CFR 2.390(d)(1) 1 *

(Upon removal of Enclosures 1, 2 and 3, this letter is uncontrolled. A Also upon removal of Attachment 5 from its respective www.duke-energy. com Enclosure, that Enclosure is uncontrolled)

&A United States Nuclear Regulatory Commission November 27, 2012 Page 2 Multiple components in all three units at ONS were not able to be inspected due to inaccessibility. A list of these components and a schedule for completing the walkdown of these components is provided for each unit in Section 4 of the respective unit's walkdown report (contained in Enclosure 1, 2 and 3 respectively). In accordance with EPRI Report 1025286, ONS will submit an update to each respective report (i.e. Enclosure), after a walkdown of the inaccessible components is complete. The commitment to submit updates is described in Enclosure 4.

This submittal has been reviewed by licensee management, representing the technical staff, regulatory staff, and senior management, in accordance with Duke Energy procedures and processes.

Should you have any questions concerning this letter, or require additional information, please contact David Haile at (864) 873-4742.

I declare under penalty of perjury that the foregoing is true and correct. Executed on November 27, 2012 Sincerely, T. P. Gillespie Jr., Vice President, Oconee Nuclear Station Enclosures

1. Unit 1 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3

2. Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3

3. Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3

4. List of Voluntary Regulatory Commitments Attachment 5 of Enclosures 1, 2 and 3 Contains Security-Sensitive Information -

Withhold From Public Disclosure Pursuant to 10 CFR 2.390(d)(1)

(Upon removal of Enclosures 1, 2 and 3, this letter is uncontrolled.

Also upon removal of Attachment 5 from its respective Enclosure, that Enclosure is uncontrolled)

&A United States Nuclear Regulatory Commission Seismic Walkdown Report November 27, 2012 Page 3 xc:

Mr. Victor M. McCree, Administrator, Region II U.S. Nuclear Regulatory Commission Marquis One Tower 245 Peachtree Center Ave., NE, Suite 1200 Atlanta, GA 30303-1257 Eric J. Leeds, Director, Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission One White Flint North, Mailstop 13-H16M 11555 Rockville Pike Rockville, MD 20852-2738 Mr. John P. Boska, Project Manager (ONS)

(By electronic mail only)

U. S. Nuclear Regulatory Commission One White Flint North, M/S O-8G9A 11555 Rockville Pike Rockville, MD 20852 NRC Senior Resident Inspector Oconee Nuclear Station

Oconee's Seismic Walkdown Information Requested by NRC's March 12, 2012, 10CFR 50.54(f) Letter November 27, 2012 -.

Enclosure 1 Unit 1 Seismic Walkdown Report (NRC 50.54 (f) NTTF Recommendation 2.3)

Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Unit 1 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 Executive Summary Electric Power Research Institute (EPRI) Report 1025286, Seismic Walkdown Guidance for Resolution of Fukushima Near-Term Task Force Recommendation 2.3: Seismic was issued in June 2012. This Document provides guidance and procedures to perform seismic walkdowns as required by the U.S. Nuclear Regulatory Commission's (NRC's) 50.54(f) letter regarding Near-Term Task Force (NTTF) Recommendation 2.3: Seismic. The EPRI guidance covers selection of personnel; selection of a sample of structures, systems, and components (SSCs) that represent diversity of component types and assures inclusion of components from critical systems / functions; conduct of the walkdowns; evaluation of potentially adverse conditions against the plant seismic licensing basis; and reporting requirements. It also includes check lists to be used by the Seismic Walkdown Engineers (SWEs) in performing the seismic walkdowns and walk-bys. Duke Energy committed to implement resolution of Near-Term Task Force (NTTF) Recommendation 2.3: Seismic using EPRI Report 1025286 in a letter to the NRC dated 7/9/2012.

1. Seismic Licensing Basis The seismic design basis for SSCs at Oconee nuclear station are defined in Section 3.7 of the UFSAR. Due to the vintage of Oconee nuclear station, some seismic terminology is not consistent with current terminology. The Operating Basis earthquake (OBE) is also referred to as the Design Basis earthquake (DBE) and the Safe Shutdown earthquake (SSE) is also referred to as the Maximum Hypothetical Earthquake (MHE).

1.1. Response Spectra The seismic spectrum response curves for Oconee were generated by the time history technique of seismic analysis. The sample earthquake utilized is that recorded at El Centro, California, N-S, May 18, 1940. The Peak Ground Acceleration (PGA) for the Design Basis earthquake (DBE) is 0.05g. The PGA for the Maximum Hypothetical earthquake (MHE) for Class 1 Structures founded on rock is 0.1g. The PGA for the Maximum Hypothetical Earthquake (MHE) for Class 1 Structures founded on overburden is 0.15g.

1.2. Seismic Qualification 1.2.1. Seismic Qualification of Safety-Related Mechanical Equipment When the response spectra at each elevation in the building have been determined, the G-loadings imposed on a component may then be determined. These loads are evaluated by the equipment supplier and in the case of complex components such as heat exchangers, the design calculations performed by the supplier are reviewed by B&W Engineering or Duke Energy, as applicable. The supplier has the freedom to use either of two alternate analytical methods to evaluate the equipment or he may choose to test it. Components maybe tested by either shaker or impact tests or a certification of the test results are required. In a few cases, a manufacturer's certification that the equipment would withstand seismic conditions is acceptable based on tests of similar equipment, an example of this would be similar type pumps. Analytically the evaluation can be made by calculating the natural frequency of the component, entering the appropriate damping curve and determining the amplification factor from the response spectrum curve. The equipment is then evaluated using these G-Ioadings. As an alternative, the component may be evaluated without calculating the natural frequency by using the peak amplification factor from the appropriate damping curve to determine Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 2 of 13

Unit 1 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 the equipment loads-This latter approach is conservative. Special attention is given to foundation and nozzle loadings for equipment such as tanks, pumps, heat exchangers, demineralizers and filters. Loads imposed by connecting piping on a given component are included and in some cases, component nozzles have had to be reinforced to accommodate these loads. Components which are most likely to require special reinforcement due to seismic loads, are long, horizontal, saddle mounted tanks, vertical tanks, mounted on legs, and stacked heat exchangers. These have all been evaluated and appropriately designed for the seismic conditions. An alternate method of seismic qualification for mechanical equipment (within the applicable equipment classes) would be an experience based approach. Seismic adequacy can be established using methods described in the Generic Implementation Procedure (GIP) for Seismic Verification of Nuclear Plant Equipment, Revision 3A, developed by the Seismic Qualification Utility Group (SQUG). This method is also commonly known as SQUG.

1.2.2. Seismic Qualification of Safety-Related Electrical Equipment The seismic design basis for instrumentation and electrical equipment is that the electrical devices considered essential in performing Reactor Protection and Engineered Safeguards functions and in providing emergency power shall be designed to assure that they will not lose their capability to perform intended safety functions during and following the Safe Shutdown Earthquake (SSE). This basic criterion has remained unchanged since the issuance of the operating license; however, the seismic qualification techniques and documentation requirements for various plant modifications have in many instances followed the advances in the state of the art.

The seismic adequacy of all electrical cable tray supports is established by the methods and criteria established for cable tray supports in the Generic Implementation Procedure (GIP-3A) for Seismic Verification of Nuclear Plant Equipment, Rev 3A, developed by the Seismic Qualification Utility Group (SQUG).

In order to meet the seismic design objectives defined in UFSAR Section 3.10.1, the following seismic evaluation methods were employed consistent with the applicable licensing commitment.

Testing Devices may be qualified by either shaker or impact tests. A certification of the test results or copies of the test results are required. Additionally, a manufacturer's certification that a certain type of equipment would withstand the seismic conditions is acceptable based on previous testing/experience with similar equipment.

Analysis Devices may also be qualified by analytical methods. For example, one evaluation method involves calculating/determining the natural frequency of the device, entering the appropriate response spectra damping curves, and determining the corresponding amplification factor. The device is then evaluated using this "G" loading value.

Alternatively, the devices may be evaluated without calculating/determining its natural frequency by using the peak amplification factor from the appropriate response spectra damping curve to determine the "G" loading.

An alternate method of seismic qualification for electrical equipment (within the applicable equipment classes) would be an experience based approach. Seismic adequacy can be established using methods described in the Generic Implementation Attachment 5 Contains Security-Sensitive Information -Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 3 of 13

Unit 1 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 Procedure -(4IP) for Seismic Verification of Nuclear Plant Equipment, Revision 3A, developed by the Seismic Qualification Utility Group (SQUG). This method is also commonly known as SQUG.

1.3. Response to generic letter 87-02 Generic Letter 87-02, "Verification of Seismic Adequacy of Mechanical and Electrical Equipment in Operating Reactors, Unresolved Safety Issue (US[) A-46," was issued because the NRC concluded that the seismic adequacy of certain equipment in operating plants must be reviewed against seismic criteria developed during the resolution of Unresolved Safety Issue (USI) A-46.

The NRC determined that it is not feasible to require older operating plants to meet new licensing requirements that were not in use when plants were licensed. Therefore, an alternative method was selected to -verify the seismic capability of equipment. This alternative method used a compilation of existing earthquake experience data supplemented by test data as the basis to verify the seismic capability of equipment. Generic Letter 87-02 allowed the seismic verification to be accomplished by utilities through a generic program, and the Seismic Qualification Utility Group (SQUG) was formed. The SQUG developed a Generic Implementation Procedure (GIP) that documents the seismic verification process, procedures, and methodologies for verifying the seismic qualification of equipment and resolving USI A-46. Supplement 1 of Generic Letter 87-02 endorsed use of the GIP for the seismic qualification process and contained revised licensee actions. Oconee performed the seismic qualification process in accordance with the NRC enforced version of the GIP. In a Safety Evaluation Report, the NRC concluded that Oconee met the purpose and intent of the seismic qualification process and that the corrective actions and modifications provide sufficient basis to close the USI A-46 review at Oconee.

The seismic verification process is considered part of the seismic licensing basis for Oconee, so the seismic qualification criteria developed by the SQUG in response to Generic Letter 87-02 must be considered during mechanical and electrical equipment modifications 1.4. Codes and Standards The following codes, standards, and specifications were used during the design, construction, testing and in-service inspection of Class 1 Structures:

ASME-1965 - Boiler and Pressure Vessel Code, Sections III, VIII, and IX

AISC - Steel Construction Manual, 6th ed

Regulatory Guide 1.92, Combining Responses And Spatial Components In Seismic Response Analysis, Revision 1, February 1976

Regulatory Guide 1.29, Seismic Design Classification, Revision 3, September 1978

Supplement No. 1 To Generic Letter (GL) 87-02 That Transmits Supplemental Safety Evaluation Report NO.2 (SSER NO. 2) On SQUG Generic Implementation Procedure Revision 2, As Correction On February 14, 1992 (GIP-2), May 22, 1992

NRC Letter To SQUG Dated December 4, 1997. Supplemental Safety Evaluation Report NO. 3 (SSER NO. 3) On The Review Of Revision 3 To The Generic Implementation Procedure For Seismic Verification Of Nuclear Power Plant Equipment, Updated 5/16/97 (GIP-3)

NRC Letter To SQUG Dated 6/23/99, Review Of Seismic Qualification Utility Group's Report on the use of Generic Implementation Procedure for New and Replacement Equipment and Parts Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 4 of 13

Unit 1 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3

2. Personnel Qualifications The personnel involved in the Oconee NTTF Recommendation 2.3 Seismic Walkdown effort met the qualification requirements of EPRI 1025286. The personnel responsibilities and qualifications are outlined in TABLE 2.1 below. (Note: PE=Professional Engineer, CLB=Current License Basis, SWEL= Seismic Walkdown Equipment List)

Table 2.1 Years of Relevant C Personnel Degree Year of Experience Reevn Qualifications E V -J E0 W 0

Russell Childs PE, SCE°", SWE',' X(3) X (Duke Energy) BS/Civil Engineering 30 IPEEEO6 )

Ray Mc Coy BS/Civil Engineering 32 PESCE X (Duke Energy)

Bob Hester (Duke Energy) BS/Civil Engineering 36 PE,SCE X Paul Mabry BS/Nuclear 27 SRO('), STA(5) X (Duke Energy) Engineering Tommy Loflin AS/Electrical 35+ SRO(4" X (Duke Energy) Engineering Jim Weir BS/Mechanical 31 SWE 2';,

(Duke Energy) Engineering SFC SYS ENG Charles M. BS/Civil Engineering 28 PE,SCE(1 ), SWE (2) X(3)

Conselman (ARES)

James White (ARES) BS/Civil Engineering 42 PE,SCE11 ), SWE (2) X(3)

John North (ARES) BS/Civil Engineering 28 PE,SWE' 2' X(3)

Mike Donnelly BS/Civil Engineering 4 SWE(2) X (ARES)

Anthony razio BS/Chemical 40+ SWE( 2 1 X (Shaw) Engineering John Spizuoco BS/Mechanical 44 PESCE(', SWE(2) X (Shaw) Engineering Arthur Richert BS/Mechanical 32 PE,SWE(2) X (Shaw) Engineering Paul BaugEman BS/Civil Engineering >40 PE,SCEt1 ), SWE (2) X(3)

(ARES) _______

George Bushnell BS/Mechanical >40 PE,SCE"), SWE (2) X (Shaw) Engineering Robert L. Keiser MS/Civil Engineering >20 PE,SCEt 1 ), SWE (2) X (Duke Energy)

NOTES:

1) Seismic Capability Engineers (SCEs) who have successfully completed EPRI Experience Based Seismic Evaluation training.

2) Seismic Walkdown Engineers (SWEs) have successfully completed EPRI 1025286 2 day walkdown training course.

3) Senior Team Member.

4) Prior Senior Reactor Operator (SRO).

5) Prior Shift Technical Advisor

6) IPEEE seismic Walkdown Coordinator and current A-46/IPEE Program Owner (SQUG)

3. Selection of SSCs The Oconee Unit 1 SWEL-1 and SWEL-2 equipment selection was performed in accordance with the EPRI guidance outlined in EPRI Technical Report #1025286. SWEL-1 represents a Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 1 OCFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 5 of 13

Unit 1 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 satnrpte of items to safely shut down the reactor and maintain containment-irntg-iity. SWEL-2 represents spent fuel pool related items.

The Oconee USI A-46/IPEEE Safe Shutdown Equipment List (SSEL) was used as the basis for the Base-1 equipment list. The scope of the Seismic Walkdown Equipment List (SWEL) is limited to SSCs that are classified as Seismic Category I. This is done such that items have a defined seismic licensing basis against which to evaluate the as-installed configuration. Oconee is a USI A-46 plant. The purpose of the USI A-46 program was to verify the seismic adequacy of essential equipment in older operating plants that had not been qualified in accordance with more recent criteria. Many of the SSC's listed in the USI A-46/IPEEE Safe Shut down Equipment List (SSEL) are not category I. However, Oconee programmatically maintains the seismic capability of these components. Therefore, for the purpose of developing the SWEL all USI A-46/IPEEE components are considered to have a seismic licensing basis.

The A-46/IPEEE SSEL effectively represents the output of EPRI guidance equipment Screening criteria's #1, #2 and #3. The underlying data used to generate the Base-1 list is contained in an ACCESS database. This ACCESS database was used to generate the Base-1 Equipment List from which the SWEL-1 was selected. The equipment comprising the Base-1 equipment list is contained in Attachment 1. Their individual Safety Function is identified as shown below. Some components support more than one safety function.

A. Reactor reactivity control B. Reactor coolant pressure control C. Reactor coolant inventory control D. Decay heat removal E. Containment function The Base-1 Equipment List is comprised of 2264 components from Oconee Units 1, 2 & 3 &

components that support all 3 Units (Common). The Base-1 Equipment list is contained in Attachment 1.

3.1. SWEL-1 Development EPRI TN-1 025286 specifies that the SWEL-1 should be comprised of between 90-120 components and that each unit should have its own individual SWEL-1.

357 of the Base-1 components are Common components that support all 3 units. In order to account for these common components, -10% (39 items) of the base-1 common components were selected as SWEL-1 components. All of the 39 common components are considered to be part of each individual unit's SWEL-1.

The Unit 1 SWEL-1 consists of 131 components. Of these 131 components, 39 are common components which are also represented in each individual unit's SWEL-I. Attachment 2 contains the SWEL-1 components for Unit 1. The criteria for selection of equipment to be included in the SWEL are described in EPRI TN-1025286 section 3.

Screen #4 -- Sample Considerations -

Five sample selection attributes that should be represented in SWEL 1:

" A variety of types of systems

Major new and replacement equipment

" A variety of types of equipment

" A variety of environments

" Equipment enhanced due to vulnerabilities identified during the IPEEE program Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 6 of 13

Unit 1 Seismic Walkdown Report-- NRC 50.54 (f) NTTF Recommendation 2.3 In addition to the five sample considerations listed above, the equipment selected for the SWEL-1 should include considerations of the contribution to Risk for the SSC's and should also include a review by appropriate Operations personnel.

SWEL-1 Systems -

The SWEL-1 equipment list represents 26 systems associated with the 5 safety functions.

SWEL-1 Types of Equipment -

The SWEL-1 list contains representative equipment from all equipment classes with the following exceptions:

There are no equipment Class 11 (Chillers), Class 12 (Air Compressors), or Class 13 (Motor - Generators) components on the Unit 1 SWEL-1 list because they are not represented in the Base-1 list.

" There are no equipment Class 17 (Engine - Generators) components on the Unit 1 SWEL-1. The Standby Shutdown Facility (SSF) Diesel Engine (16 Cylinder)

(OSSFDEOOOA) is listed on the Base-1 list. However, it was not selected as part of the SWEL-1 due to its inherently robust nature and the very low seismic input at its location.

SWEL-1 Equipment locations -

The SWEL-1 equipment list includes equipment located in a broad variety of areas and environments. These areas comprise multiple buildings and elevations and include equipment located both inside and outside. The equipment areas provide a broad range of equipment environmental conditions, which include:

" Mild environmental conditions with limited temperature and humidity variations (e.g.

Control Room, Cable Rooms, Equipment Rooms, SSF Electrical Room, Relay House, etc.)

Moderate environmental conditions (e.g. general areas of the Auxiliary Building, East &

West Penetration Rooms, SSF Diesel Room, SSF Battery Room, Control Room Ventilation Rooms, etc.)

Moderate to harsh environmental conditions (e.g. LPI/BS/HPI Pump Rooms, LPI Cooler Room, etc.)

Harsh environmental conditions (e.g. Inside RB Containment, etc.).

Partial exposure to outdoor environmental conditions (e.g. Switchyard, Intake Structure)

Wet environments (Keowee Turbine Wheel Pit)

SWEL-1 Major New and Replacement Equipment -

In order to capture significant new and replacement equipment on the SWEL-1, a query was written which related the Base-1 equipment list to underlying data supporting Engineering Changes in the Duke Energy Nuclear Asset Suite Software (NAS). By doing this, a list EC's associated with all components on the Base-1 equipment list was generated. Editorial and minor modifications were then filtered out of the list. The following New and Replacement Equipment have been included in the Unit 1 SWEL-1.

Equip* Eninern I':*D Noý.:J

_____N * *:_____ :'

a___________me._

Change Ch**!:!i ange* :,* , .... *,"i*

MOD Description I* ...

1ASPT0117P AUX STEAM PRESSURE ECO000099571 REPLACE OBSOLETE MOORE 352 CONTROLLER TRANSMITTER (MS-126 & MS-129) 1ASSS0017 WITH A SIEMENS 353 CONTROLLER OD100219 -(REFURB) DIGITAL CONTROL ROD 1CRDCACC1 DCRDCS CONTROL CABINET CC-1 EC0000078244 DRIVE CONTROL STE DRIVE CONTROL SYSTEM Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 7 of 13

Unit 1 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3

,.Equip Engineering...

'I.DiNo. ", . i ..** Name*.

!! : .:,*Chfa~nge:* ., ... , : MOD Description

- i* ,*

NSM ON-130S3/00/00/AL1 - (REFURB)

EC 00 00 0 6 8 1 12 A TM FEEDWATER ISOLA Y ( AFIS) 1 ELCA SGLC 1 S T EA M GEN LO G IC CA BIN ET AUTOMATIC FEEDWATER ISOLATION SYS (AFIS) 00501461 - UNIT 1 & 2 SFP LEVEL INTERLOCK UNIT 1 PNEUMATIC INSTR RACK ECO000093683 SINGLE FA IURE 1ELIRPIR SINGLE FAILURE 1ELPLPZR1B 600V 60VPBl PPB 1B (FOR PRESSURIZER FRPESRZR EREPLACE EC0000106356 70 A AND 225 A PZR HTR BREAKERS IN HEATERS GROUP 1B, BANK 2) REACTOR BUILDING WITH 80 A FUSES 1ELTFOCT1 XFMR CT-i EC0000100369 REPLACE 70AB AGASTAT 2432ABB WITH AGASTAT 7032ABB 1HPIFT0007A HPI A TRAIN INJ FLOW TRANS EC0000089821 OD100076 - (REFURB) UNIT 1 INST LOOP UPGRADES AND NEW CRS OD100076 - (REFURB) UNIT 1 INST LOOP UNIT 1 ICCM TRAIN A CABINET ECO000089821 UDES A NEW CRS 11CCCA0001A UPGRADES AND NEW CRS lLPIFT0004P LPI TRAIN 1B INJ FLOW TRANS ECO000089821 OD100076 - (REFURB) UNIT 1 INST LOOP (Powered by ICCM) UPGRADES AND NEW CRS LPI COOLER 1A FLOW XMTR OE400391 - DETERMINE REPLACEMENT FOR (1LPSW-251) ROSEMOUNT 1151 TYPE J 1PPSCA0005 RPS C/ES C1 EC0000090482 (EC90482) (REFURB) UNIT 1 RPS REPLACEMENT MODIFICATION 1PPSCA0009 ES A2 EC000090423 OD100066 - (REFURB) UNIT 1 ESFAS REPLACEMENT MODIFICATION IPPSCA0011 ES C2 EC0000090423 OD100066 - (REFURB) UNIT 1 ESFAS REPLACEMENT MODIFICATION 1PPSCA0018 .ES STATUS EVEN EC0000090423 OD100066 - (REFURB)UNIT1ESFAS REPLACEMENT MODIFICATION 1RCLT0004P1 PRZ LEVEL TRANSMITTIER EC0000089821 OD100076 UGAE - N(REFURB) E RUNIT 1 INST LOOP UPGRADES AND NEW CRS OD100613 - REPLACE SSF CONTROL CONSOLE 1RCPT0226 Ul RC LOOP B PRESSURE EC0000090682 IDICATOR A RCSPTN INDICATORS AND RCS PTS 1VSAH0011 AHU-11 CONTROL ROOM A/C ECO000100110 REPLACE UNIT 1&2 CONTROL ROOM AHU 1-11 Oconee revised the modification process at the completion of the A-46/IPEEE programs to require plant modifications to evaluate impact to A-46/IPEEE components to ensure that the seismic capability of A-46/IPEEE components was not degraded.

Current site projects such as Protected Service Water (PSW) which are not operational and not currently credited within the Current Licensing Basis (CLB) of Oconee are not within the scope of the SWEL-1.

SWEL-1 Equipment Enhanced per IPEEE -

Significant IPEEE enhancements associated with the Base-1 equipment list as reported in the IPEEE submittal dated 12/15/1997 were identified. SWEL-1 SSCs were selected such that a sampling of SSCs which had been enhanced per IPEEE was included. The following SWEL-1 SSCs were enhanced due to IPEEE.

r Equip _*Engineer.ing IDNrn N~ MOD Description 1BAGBD1UB2 CONTROL BOARD 1UB2 ONOE-12649 Relocate drawing sticks located behind 1UB2.

A 240/120V 1A REGULATOR Install additional bracing to unistrut frame 1ELBKIA OUTPUT BKR ONOE-14009 supportinglA/1B/SW, 1A/MCB, 1B/MCB, 1A/REG, 1B/REG, 1A/XFMR & 1B/XFMR 1ELDI1ADB ISOL DIODE ASSEMBLY 1ADB ONOE-12675 Install 1D washer plates to three North anchors of 1ADB 1ELLX1X4 600V LC 1X04 ONOE-14369 Weld emdedag.transformer section of Load Centers 1X04 to embedded angle.

Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 8 of 13

Unit 1 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 Equip EnginMring .

" Name " MOD Description JD No. .. Change .

Add shims under load center at anchors on North 1ELLX1X9 600V LC 1X09 ONOE-13461 sie side.

1ELMX1XC MCC 1XC ONOE-14370 Add back to back bolting to 1XC.

Add back to back bolting to the 3 South most bays 1ELMXIXGB MCC 1XGB ONOE-14360 of1B of lXGB 1ELMX1XL MCC 1XL ONOE-14378 Add rigid support to cable tray above 1XL & 1XN in E-W direction.

1ELPLIDCA 125V DC 1DCA ONOE-12778 Replace back right anchor for 1DCA 1ELPLPZR1B 600V PPB 1B (FOR PRESSURIZER ONOE09290 Replace missing or broken door latch on PPB 1B HEATERS GROUP 1B BANK 2) and adjacent PPB 1A & ID.

1VSAH0011 AHU-11 CONTROL ROOM A/C ONOE-15560 Install lateral seismic restraint.

SWEL-1 Risk Considerations -

EPRI TN-1 025286 requires that the development of SWEL 1 should include consideration of the importance of the contribution to risk for the SSCs.

In response to IPEEE, Oconee utilized the results of seismic margin methodology walkdowns to enhance the existing seismic PRA. These results are documented in OSC-10225 "Seismic PRAIIPEEE Backup Calculations" and summarized in the Supplemental IPEEE submittal Report. From the conclusions presented in the Supplemental IPEEE submittal Report, PRA sequences involving loss of power and SSF response make up several of the most dominate PRA cut sets. SSC's supporting Keowee, the SSF, and the 230 KV switchyard are well represented in the SWEL-1.

In addition, input was obtained from the General Office PRA group to determine a ranking of the most seismically risk significant components.

Of the 31 unscreened PRA events with a contribution to CDF of greater than 0%, 19 are represented in the combined SWEL-I's for Units 1, 2 & 3. This represents 61% of PRA risk significant components and meets then intent of EPRI TN-1 025286.

SWEL-1 Operations review -

The SWEL-1 equipment listed was submitted to Oconee Operations for review as recommended within EPRI TN-1025286. Operations concurred with the equipment listed on the SWEL-1 list. The SWEL-2 equipment list was developed within the Oconee Engineering organization by a highly experienced engineer who had previously held a Senior Reactor Operators License (SRO) and was previously an Operations Shift Technical Advisor (STA).

3.2. SWEL-2 Development The Oconee Unit 1 SWEL-2 spent fuel pool equipment list was developed in accordance with the EPRI guidance. Seismic Category I structures, piping, and containment penetrations were specifically excluded by the EPRI guidance. The four screening criteria specified were as follows:

1) Seismic Category I or USI A-46 (SQUG) licensing bases,

2) Spent Fuel Pool (SFP) equipment appropriate for an equipment walkdown process,

3) Sample considerations represent broad population of equipment with considered sample selection attributes such as:

a. represent a variety of systems, Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 1 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3

b. major new/replacement equziliiient,

c. variety of equipment types,

d. variety of environments

4) Equipment which could result in rapid drain down of the SFP (includes both seismic and non-seismic components and similar factors outlined in 3) above.

The SWEL-2 equipment Base-2 (Attachment 3) was established based on screens #1 and

2 above. Equipment was selected from the Base-2 list based on screening criteria #3 above, and primarily included major equipment such as the spent fuel cooling system pumps, pump motor air handling units, and heat-exchangers.

The SWEL-2 list was further evaluated based on screening criteria #4 above, to include equipment which could result in SFP rapid drain-down, as defined by the EPRI guidance.

All three Oconee Unit's have SF Pool transfer tubes that open to the SF Pool in normal operation. The SSF RC Make-up and letdown lines penetrate into the SF Pool transfer tubes. The SSF Make-up and Letdown lines meet Seismic Category 1. There were also SF Pool discharge lines at valves SF22&50 and 3SF-22&50 that could meet the criteria for a rapid drain down due to a siphon if the SF Cooling pump discharge piping, which meets Seismic Category 1, were to fail outside the SF Pool. However, this vulnerability had previously been identified and procedure requirements prevent system alignment and thereby remove this vulnerability. For these reasons, there are no rapid draw down items on the SWEL-2.

The SWEL-2 components were selected based on their radiological accessibility. Of the 3 pumps identified in the SWEL-2 base list, 2 were included in the SWEL-2. Of the 7 Tanks identified in the SWEL-2 base list, 4 were included in the SWEL-2. This sampling is in accordance with EPRI TN-1025286.

The final SWEL-2 list is provided in Attachment 4.

4. Seismic Walkdowns and Area Walk-Bys SWEL-1 SSCs which could only be accessed during an outage will be walked down by Duke Energy personnel and reported on at a later date. These SSCs are listed below.

1 Bldg MV0A STEAM NaSFeTYE 1 AB 1MSVA0006 MAIN STEAM SAFETY RELIEF 1 AB 1MSVAOO1O MAIN STEAM SAFETY RELIEF 1 RB 1ELPLPZR1B 600V PPB 113 (FOR PRESSURIZER HEATERS GROUP 1B BANK 2) 1 RB 1FDWLT0082 SG 1A LEVEL TRANSMITTER 1 RB 1HPIPUO00S SSF RC MAKEUP PUMP 1 RB 1RBCAH0020A RBCU FAN 1A 1 RB 1RBCHXOOODAUX AUX RBCU D 1 RB 1RCLT0004P1 PRZ LEVEL TRANSMITTER 1 RB 1RCPT0166P RCS LOOP B PRESS TRANS 1 RB 1RCPT0226 Ul RC LOOP B PRESSURE 1 RB 1RCRDOOO6A Al COLD LEG RTD 1 RB 1RCVAO066 PRZ PORV 1 RB 1RCVA0159 RV VENT ISOLATION Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 1 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 Duke Energy contracted with the Shaw Group / ARES Corporation team to perform the majority of the NTTF 2.3 seismic walkdowns at Oconee Nuclear Station. A summary report of the walkdowns along with the individual Seismic Walkdown Checklists and the Area Walk-By Checklists are contained in this report. The NTTF 2.3 Seismic Walkdown Report for Unit 1 is contained in Attachment 5. Items found to be inaccessible during this walkdown are addressed below.

Inaccessible SSCs -

Several Unit 1 SSC's were inaccessible due to their physical location or due to personnel safety concerns. These items are listed below.

1 TB 1ELLX1X4 600V LC 1X04 1 AB 1ELLX1X9 600V LC IX09 1 AB 1VSAH0011 AHU-11 CONTROL ROOM A/C The anchorage for one SSC was only partially visible due to some of the welds being covered by mortar spillage from an adjacent masonry wall. A station Work request has been written to clean the weld area and the welds will be evaluated at a later date. This Item and several other inaccessible items listed below are common to all 3 units but will be included in the Unit 1 update report.

0 SYD OSYDPLSYDC1 SWITCHYARD DISTRIBUTION CENTER 1 K1 KEO K1PMGDTMPU1A SPEED CONTROL MAGNETIC PICKUP 1A K2 KEO K2ELKTNO203 TERM BOX TB-203 K2 KEO K2GAHXO003 GEN AIR COOLER 3 K2 KEO K2HPOPU88HA AC GEN HP LIFT PUMP (88HA)

K2 KEO K2TSLS63SB TURB SUMP LEVEL SWITCH (2TSLS0002)

An update to this report will be submitted by July 1, 2013. The update will provide the results associated with the Outage deferred items and the inaccessible items above. Associated Area Walk bys for the listed components will be completed in conjunction with the individual SSC's.

5. Licensing Basis Evaluations A total of 17 potential adverse conditions were identified per the Seismic Walkdowns and the Area walk-by's. All of these potential issues were entered into the Corrective Action Program (CAP). All potential adverse conditions were evaluated for their compliance with the seismic licensing basis within the CAP and were found to be acceptable. Station Work Requests were written for some conditions as good practice. The potential adverse conditions and their individual Problem Investigation process (PIP) tracking numbers are listed in the NTTF 2.3 Seismic Walkdown Report for Unit 1 contained in Attachment 5.

6. IPEEE Vulnerabilities Resolution Report Oconee submitted its response to IPEEE on 12/21/1995 & 12/15/1997. In those submittals, Oconee stated that there were no underlying significant sequences (vulnerabilities) from external events. There were also no plant changes identified that would significantly reduce risk from external events.

Table 6-1 of the IPEEE Submittal dated 12/15/1997 listed 152 enhancements. The enhancements identified have been completed by either Station Work Request, Plant Modification or Analysis.

Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 1 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 Oconee is a USI A-46 plant and performed the USI A-46 walkdowns in conjunction with the IPEEE walkdowns. In Oconee's letter to the NRC dated 9/12/2002, Oconee confirmed that outliers associated with Generic Letter 87-02 (USI A-46) have been completed. Oconee performed the USI A-46 seismic evaluations in conjunction with the IPEEE evaluations. The criteria for both programs were conservatively enveloped such that an evaluation of a given component would address all aspects of both programs. IPEEE enhancements are a subset of the overall USI A-46 outliers. Therefore, implementation of the IPEEE enhancements is confirmed by the 9/12/2002 SQUG Outlier Resolution Completion Notice.

7. Peer Review Duke Energy (Duke) contracted with the Shaw Group (Shaw) / ARES Corporation (ARES)

Team to perform the NTTF 2.3 peer review at the Oconee Nuclear Station (ONS). The Peer Review Report is contained in Attachment 6.

The Peer Review Team consisted of three individuals, all of whom have seismic engineering experience as it applies to nuclear power plants. These individuals participated in the peer review of each of the activities. The members of the Peer review team and their qualifications are listed in table 2.1 The Peer Review team concluded that the Shaw/ARES methodology conforms to the guidance in Section 6 of EPRI 1025286. The peer review covered the following:

The selection of the SSCs included on the Seismic Walkdown Equipment List (SWEL).

A sample of the checklists prepared for the seismic walkdowns and area walk-bys.

The licensing basis evaluations.

The decisions for entering the potentially adverse conditions in the Corrective Action Program (CAP) process.

The submittal report.

The peer review process for the SWEL development and the seismic walkdowns consisted of the following:

Reviewing the activity guidance in EPRI 1025286, the NEI Q&A bulletins, the NEI first-mover reports, and NRC Temporary Instruction 2515/188.

" Conducting an in-process review at the plant site, including interviews with the personnel performing the activity and reviewing in-process documentation.

Performing an in-plant surveillance (for the walkdown activity) of a seismic walkdown and an area walk-by.

Providing in-process observations and comments to the personnel performing the activities.

" Conducting a final review of a sample of the completed documentation.

The peer review process for the licensing basis evaluations and the decisions for entering potentially adverse conditions into the CAP consisted of reviewing the overall review process and a sample of the licensing basis reviews. The peer review process for the submittal report consisted of reviewing the draft submittal prepared by Oconee Design Engineering for licensing review.

Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 1 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 The conclusion of the peer review is that the ONS NTTF 2.3 seismic walkdown effort has been conducted in accordance with the guidance in EPRI 1025286. Comments made during the in-process review of the SWEL development and the walkdowns have been addressed satisfactorily. In-process comments on the final walkdown reports, the licensing basis reviews, and the submittal have also been resolved.

REFERENCES:

1) UFSAR Section 3.2.1 Seismic Classification (Rev. 21)

2) UFSAR Section 2.5.1.2 Site Geology (Rev. 21)

3) UFSAR Sections 2.5.2.10, 2.5.2.11 SSE/OBE (Rev. 21)

4) UFSAR Section 3.7 Seismic Design (Rev. 21)

5) EPRI Report 1025286, Dated May 2012, Seismic Walkdown Guidance for Resolution of Fukushima Near-Term Task Force (NTTF) Recommendation 2.3 (ATTACHMENT 1).

6) Oconee NRC Response to GL 88-20, Individual Plant Examination of External Events (IPEEE)

Submittal, dated Dec. 18, 1997, W. R. McCollum Jr. to NRC.

7) 7/9/12 correspondence to NRC from Ben C. Waldrep, "Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident" ATTACHMENTS:

1) Oconee Unit 1 SWEL-1 Base-1 List

2) Oconee Unit 1 SWEL-1

3) Oconee Unit 1 SWEL-2 Base-2 List and Rapid Drain Down List

4) Oconee Unit 1 SWEL-2

5) Seismic Walkdown Summary Report and Checklists

6) PEER Review Summary Report Attachment 5 Contains Security-Sensitive Information -Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Attachment 1 Oconee Unit 1, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 0 CC CD 0001 SSF HVAC CONDENSER 1 SSF 817 B,C 0 CC CD 0002 SSF HVAC CONDENSER 2 SSF 817 B,C 0 CC PU 0001 AUX SERVICE WATER PUMP AB 771 D 0 CC PU 0002 SSF AUX SERVICE WATER PUMP SSF 754 D 0 CC PU 0003 HVAC SERVICE WTR PUMP 1 SSF 754 B,C 0 CC PU 0004 HVAC SERVICE WTR PUMP 2 SSF 754 B,C 0 CC PU 0005 SSF DIESEL WATER JACKET PUMP SSF 754 B,C 0 CC PU 0010 SSF SUBMERSIBLE PUMP SSF 796 B,C 0 DA TK OOOA DIESEL STARTING AIR TANK A SSF 777 B,C 0 DA TK 000B DIESEL STARTING AIR TANK B SSF 777 B,C 0 DA TK 000C DIESEL STARTING AIR TANK C SSF 777 B,C 0 DA TK OOOD DIESEL STARTING AIR TANK D SSF 777 B,C 0 DJW HX OOOA SSF DJW HEAT EXCHANGER A SSF 777 B,C 0 DJW HX 000B SSF DJW HEAT EXCHANGER B SSF 777 B,C 0 EL BS 4160CT4 4160V STANDBY BUS FDR FROM XFMR CT4 TO BIT & B2T TB 796 A, B, C, D, E 0 EL BS CCTRENCH CONTROL CABLE TRENCH (SWYD TO OCONEE) SYD 770 A, B, C, D, E 0 EL BS UFCT4 UNDERGROUND FEEDER (KEOWEE TO CT4) SYD 770 A, B, C, D, E 0 EL CA SYTC1 SWYD TERMINAL CABINET 01 SYD 770 A, B, C, D, E 0 EL CA SYIC12 SWYD TERMINAL CABINET 12 SYD 770 A, B, C, D, E 0 EL CA SYTC15 SWYD TERMINAL CABINET 15 SYD 770 A, B, C, D, E 0 EL CA SYTC 17 SWYD TERMINAL CABINET 17 SYD 770 A, B, C, D, E 0 EL CA SYTC18 SWYD TERMINAL CABINET 18 SYD 770 A, B, C, D, E 0 EL CA SYTC19 SWYD TERMINAL CABINET 19 SYD 770 A, B, C, D, E 0 EL CA SYTC2 SWYD TERMINAL CABINET 02 SYD 770 A, B, C, D, E 0 EL CA SYTC3 SWYD TERMINAL CABINET 03 SYD 770 A, B, C, D, E 0 EL CA SY-C4 SWYD TERMINAL CABINET 04 SYD 770 A, B, C, D, E 0 EL CA SYTC5 SWYD TERMINAL CABINET 05 SYD 770 A, B, C, D, E 0 EL CA SYTC8 SWYD TERMINAL CABINET 08 SYD 770 A, B, C, D, E 0 EL PL CT4FSC CT4 FAN SPEED CABINET TB 796 A, B, C, D, E 0 EL PL DCSF 125 VDC POWER PNL BRD DCSF SSF 777 A, B, C, D, E 0 EL PL DCSF1 125 VDC DISTRIBUTION CENTER DCSF-1 SSF 777 A, B, C, D, E 0 EL PL KSF 208/120VAC SSF VITAL PWR PNL (GRAY) SSF 777 A, B, C, D, E 0 EL PL KSFC 120V PPB KSFC SSF 777 A, B, C, D, E 0 EL SH ASWS AUX SERV WATER SWGR (4160V) (1TD-0) AB 771 A, B, C, D, E 0 EL SH BIT05 SK1 CT4 TO STDBY BUS 1 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH B1T09 SL1 CT5 STDBY BUS 1 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH BIT1O AUX SERVICE WATER SWGR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH B2T05 SL2 CT5 STDBY BUS 2 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH B2T09 SK2 CT4 STDBY BUS 2 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH DGSWGR DIESEL GENERATOR SWITCHGEAR SSF 777 A, B, C, D, E 0 EL TF OCT4 XFMR CT-4 BH3 796 A, B, C, D, E 0 EL TF OCT5 XFMR CT-S YD 796 A, B, C, D, E 0 FO PU 0005 SSF DIESEL ENGINE FUEL OILTRANSFER PUMP SSF 777 B,C 0 FO TK 0003 SSF DIESEL OIL DAY TANK SSF 777 B,C Page 1 of 23

Attachment 1 Oconee Unit 1, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 0 FO TK 0004 SSF DIESEL OIL STORAGE TANK YD 785 B,C 0 HPS PG 0012 JOCKEY PUMP DISCH. PRESS. GAGE TB 775 B,C 0 HPS PG 0013 HPSW PUMP B DISCH. PRESS. GAGE TB 775 B,C 0 HPS PG 0016 HPSW PUMP A DISCH. PRESS. GAGE TB 775 B,C 0 HPS PG 0224 HPSW PUMP A STRAINER DP GAGE TB 775 B,C 0 HPS PG 0225 HPSW PUMP B STRAINER DP GAGE TB 775 B,C 0 HPS PG 0226 JOCKEY PUMP STRAINER DP GAGE TB 775 B,C 0 HPS PU 0001 HPSW STANDBY PUMP A TB 775 B,C 0 HPS PU 0002 HPSW STANDBY PUMP B TB 775 B,C 0 HPS PU 0003 HPSW JOCKEY PUMP TB 775 B,C 0 HPS VA 0140 Seal Supply Reg. Valve TB 775 B 0 HPS VA 0147 Seal Supply Reg. Valve TB 775 B 0 HPS VA 0154 Seal Supply Reg. Valve TB 775 B 0 LPS FL OOOA LPSW PUMP A STRAINER TB 775 D 0 LPS FL 000B LPSW PUMP B STRAINER TB 775 D 0 LPS FL 000C LPSW PUMP C STRAINER TB 775 D 0 LPS PS 0097 A LPSW HDR PRESS #1 TB 775 D 0 LPS PS 0098 A LPSW HDR PRESS #2 TB 775 D 0 LPS PU OOOA LPSW PUMP A TB 775 D 0 LPS PU 0008 LPSW PUMP B TB 775 D 0 LPS PU 000C LPSW PUMP C TB 775 D 0 LPS VA 0175 LPSW PUMP A SEAL FLOW REG TB 775 D 0 LPS VA 0182 LPSW PUMP B SEAL FLOW REG TB 775 D 0 LPS VA 0189 LPSW PUMP C SEAL FLOW REG TB 775 D 0 NI CA 0225 SSF NUCLEAR INSTRUMENTATION RACK SSF 777 A, B, C, D, E 0 RC HX 000A A RCW HEAT EXCHANGER TB 775 D 0 RC HX 0008 B RCW HEAT EXCHANGER TB 775 D 0 RC HX 000C C RCW HEAT EXCHANGER TB 775 D 0 RC HX 000D D RCW HEAT EXCHANGER TB 775 D 0 SSF BA DCSF DCSF SSF NORMAL BATTERY SSF 777 A, B, C, D, E 0 SSF BA DCSFS DCSFS SSF STANDBY BATTERY SSF 777 A, B, C, D, E 0 SSF CA 0002 PZR HEATER CAB (SSF)SSF PRESSURIZER HEATER CABINET (PHC) SSF 777 A, B, C, E 0 SSF CA 0003 SSF PRESSURIZER HEATER CABINET (PHC1) SSF 777 A, B, C, E 0 SSF CA ICl SSF EOC SYS INTERCONN CAB IC1 SSF 797 A, B, C, D, E 0 SSF CA IC2 SSF EOC SYS INTERCONN CAB IC2 SSF 797 A, B, C, D, E 0 SSF CA MEC MISC EQUIP CAB 5SF 797 A, B, C, D, E 0 SSF DE OOOA SSF DIESEL ENGINE B (16 CYL) SSF 777 A, B, C, D, E 0 SSF MX XSF MCC XSF(600V) SSF 777 A, B, C, D, E 0 SSF PL SSFCP SSF CONTROL PANEL SSF 797 A, B, C, D, E 0 SSF SH OTS1 OTS1 SSF ESSENTIAL SWGR 4160V SSF 777 A, B, C, D, E 0 SYD BA SYl 230KV SWYD BATTERY #SY1 SYD 770 A, B, C, D, E 0 SYD BA SY2 230KV SWYD BATTERY #SY2 SYD 770 A, B, C, D, E 0 SYD BC SYl 230KV SWYD BATTERY CHARGER SY1 SYD 770 A, B, C, D, E 0 SYD BC SY2 230KV SWYD BATTERY CHARGER SY2 SYD 770 A, B, C, D, E Page 2 of 23

Attachment 1 Oconee Ubit , SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 0 SYD BD RB02 SWITCHYARD RELAY BOARD RB02 SYD 770 A, B, C, D, E 0 SYD BD RBO3 SWITCHYARD RELAY BOARD RB03 SYD 770 A, B, C, D, E 0 SYD BD RB06 SWITCHYARD RELAY BOARD RB06 SYD 770 A, B, C, D, E 0 SYD BD RB07 SWITCHYARD RELAY BOARD RB07 SYD 770 A, B, C, D, E 0 SYD BD RB08 SWITCHYARD RELAY BOARD RB08 SYD 770 A, B, C, D, E 0 SYD BD RB1O SWITCHYARD RELAY BOARD RB1O SYD 770 A, B, C, D, E 0 SYD BD RB17 SWITCHYARD RELAY BOARD RB17 SYD 770 A, B, C, D, E 0 SYD BD RFO2 SWITCHYARD RELAY BOARD RF02 SYD 770 A, B, C, D, E 0 SYD BD RF03 SWITCHYARD RELAY BOARD RFO3 SYD 770 A, B, C, D, E 0 SYD BD RF06 SWITCHYARD RELAY BOARD RF06 SYD 770 A, B, C, D, E 0 SYD BD RF17 SWITCHYARD RELAY BOARD RF17 SYD 770 A, B, C, D, E 0 SYD BD SRB06 SWITCHYARD RELAY BOARD SRB06 SYD 770 A, B, C, D, E 0 SYD BD SRB09 SWITCHYARD RELAY BOARD SRB09 SYD 770 A, B, C, D, E 0 SYD BD SRB14 SWITCHYARD RELAY BOARD SRB14 SYD 770 A, B, C, D, E 0 SYD BD SRB15 SWITCHYARD RELAY BOARD SRB15 SYD 770 A, B, C, D, E 0 SYD BD SRB17 SWITCHYARD RELAY BOARD SRB17 SYD 770 A, B, C, D, E 0 SYD BD SRF06 SWITCHYARD RELAY BOARD SRF06 SYD 770 A, B, C, D, E 0 SYD BD SRF07 SWITCHYARD RELAY BOARD SRF07 SYD 770 A, B, C, D, E 0 SYD BD SRF08 SWITCHYARD RELAY BOARD SRF08 SYD 770 A, B, C, D, E 0 SYD BD SRF09 SWITCHYARD RELAY BOARD SRF09 SYD 770 A, B, C, D, E 0 SYD BD SRF10 SWITCHYARD RELAY BOARD SRF1O SYD 770 A, B, C, D, E 0 SYD BD SRF17 SWITCHYARD RELAY BOARD SRF17 SYD 770 A, B, C, D, E 0 SYD BK PCB08 230KV AC POWER CIRCUIT BREAKER 08 (PCB-08) SYD 770 A, B, C, D, E 0 SYD BK PCB09 230KV AC POWER CIRCUIT BREAKER 09 (PCB-09) SYD 770 A, B, C, D, E 0 SYD BK PCB12 230KV AC POWER CIRCUIT BREAKER 12 (PCB-12) SYD 770 A, B, C, D, E 0 SYD BK PCB15 230KV AC POWER CIRCUIT BREAKER 15 (PCB-15) SYD 770 A, B, C, D, E 0 SYD BK PCB33 230KV AC POWER CIRCUIT BREAKER 33 (PCB-33) SYD 770 A, B, C, D, E 0 SYD BS 230KRED 230KV SWITCHYARD RED BUS SYD 770 A, B, C, D, E 0 SYD BS 23OKYEL 230KV SWITCHYARD YELLOW BUS SYD 770 A, B, C, D, E 0 SYD BS TRENCH MISC SWYD TRENCHES SYD 770 A, B, C, D, E 0 SYD PL DYA DC PANELBOARD A SYD 770 A, B, C, D, E 0 SYD PL DYB DC PANELBOARD B SYD 770 A, B, C, D, E 0 SYD PL DYC DC PANELBOARD C SYD 770 A, B, C, D, E 0 SYD PL DYE DC PANELBOARD E SYD 770 A, B, C, D, E 0 SYD PL DYF DC PANELBOARD F SYD 770 A, B, C, D, E 0 SYD PL DYG DC PANELBOARD G SYD 770 A, B, C, D, E 0 SYD PL SYDC1 SWITCHYARD DISTRIBUTION CENTER 1 SYD 770 A, B, C, D, E 0 SYD PL SYDC2 SWITCHYARD DISTRIBUTION CENTER 2 SYD 770 A, B, C, D, E 0 SYD TF RBPT RED BUS POTENTIAL TRANSFORMER (EGPS) SYD 770 A, B, C, D, E 0 SYD TF YBPT YELLOW BUS POTENTIAL TRANSFORMER (EGPS) SYD 770 A, B, C, D, E 0 VS AH 0042 AHU 0-42 HEATING AND A/C SSF BUILDING SSF 817 B,C 0 VS AH 0044EX1 SSF CONST VENT SUPPLY FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX2 SSF SUMMER VENT SUPPLY FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX3 SSF ON LINE VENT SUPPLY FAN & MOTOR SSF 817 B,C Page 3 of 23

Attachment 1 Ocorit--Unit 1, SWEL-1, Base 1 Equipment List Unit Sys 1ype Number Description Bldg. FLEL Safety Function 0 VS HA 0044EX4 SSF ENGINE EX FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX5 SSF SUMMER EXHAUST FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX6 SSF ON LINE EXHAUST FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX7 SSF CONSTANT EXHAUST FAN & MOTOR SSF 817 B,C 0 VS DA CDO1 SSF CONSTANT VENTILATION (VS-AH-0044EX1) EXHAUST FAN DAMPER SSF 817 B,C 0 VS DA CD02 SSF SUMMER VENTILATION (VS-AH-044EX2) EXHAUST FAN DAMPER SSF 817 B,C 0 VS DA CD03 SSF ON-LINE VENTILATION (VS-AH-0044EX3) EXHAUST FAN DAMPER SSF 817 B,C 0 VS DA IDOl SSF INLET DAMPER ID-1 (AH EXHAUST FAN AH0044EX4) SSF 817 B,C 0 VS DA IDOlE ACTUATOR FOR INTAKE DAMPER SSF-ID-A & B SSF 817 B,C 0 VS DA ID01W ACTUATOR FOR INTAKE DAMPER SSF-ID-C & D SSF 817 B,C 0 VS DA ID02 INLET DAMPER ID-2 (SSF AH EXH FAN AHOO44EX3) SSF 817 B,C 0 VS DA IDO2A ACTUATOR FOR INLET DAMPER SSF-ID2 (EXH FAN AH0044EX3) SSF 817 B,C 0 VS DA ID03 SSF INLET DAMPER ID-3 (AH EXHAUST FAN AH0044EX1) SSF 817 B,C 0 VS DA ID03A ACTUATOR FOR INLET DAMPER SSF-ID3 (EXH FAN AH0044EX1) SSF 817 B,C 0 VS DA ID04 SSF INLET DAMPER ID-4 (AH EXHAUST FAN AH0044EX2) SSF 817 B,C 0 VS DA ID04A ACTUATOR FOR INLET DAMPER SSF-ID4 (EXH FAN AH0044EX2) SSF 817 B,C 0 VS DA XD01 SSF EXH DAMPER XD-1 (AH EXH. FAN AH0044EX4) SSF 817 B,C 0 VS DA XDO1E ACTUATOR FOR EXH DAMPER SSF-XD-A&B SSF 817 B,C 0 VS DA XDO1W ACTUATOR FOR EXH DAMPER SSF-XD-C&D SSF 817 B,C 0 VS DA XO02 SSF PRESS OPER EXH DAMPER XD-2 (AH EXH FAN AHOO44EX7) SSF 817 B,C 0 VS DA XD03 SSF EXH DAMPER XD-3 (AH EXH FAN AH0044EX1) SSF 817 B,C 0 VS DA XD03A ACTUATOR FOR EXH DAMPER SSF-XD3 (EXH FAN AH0044EX1) SSF 817 B,C 0 VS DA XD04 SSF PRESS OPER EXH DAMPER XD-4 (AH EXH. FAN AH0044EX5) SSF 817 B,C 0 VS DA XD05 SSF EXH DAMPER XD-5 (AH EXH. FAN AH0044EX2) SSF 817 B,C 0 VS DA XD05A ACTUATOR FOR EXH DAMPER SSF-XD5 (EXH FAN AH0044EX2) SSF 817 B,C 0 VS DA XD06 SSF PRESS OPER EXH DAMPER XD-6 (AH EXH. FAN AH0044EX6) SSF 817 B,C 0 VS PE SSFPE01 SSF SUMMER VENT. SYSTEM (VH) EXHAUST FAN (SSF-XF-3) SSF 825 A, B, C, D, E 0 VS PE SSFPE02 SSF A/C SYSTEM AIR HANDLING UNIT SSF TBD A, B, C, D, E 0 VS PL CP01AH2 SSF CONTROL BOARD FOR THE HVAC SYSTEM SSF 817 A, B, C, D, E 0 VS PS SSFPS01 SSF CONSTANT VENTILATION SYSTEM SUPPLY FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS02 SSF SUMMER VENTILATION SYSTEM SUPPLY FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS03 SSF ON-LINE VENTILATION SYSTEM SUPPLY FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS04 SSF CONSTANT VENTILATION SYSTEM EXHAUST FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS05 SSF SUMMER VENTILATION SYSTEM EXHAUST FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS06 SSF ON-LINE VENTILATION SYSTEM EXHAUST FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS07 SSF ENGINE VENTILATION SYSTEM EXHAUST FAN SSF 782 A, B, C, D, E 0 VS PS SSFPS08 SSF A/C SYSTEM AIR FLOW PRESS SWITCH SSF A, B, C, D, E TBD 0 VS I-r SSFCTl HVAC TEMPERATURE CONTROLLER (FOR SSF-AH-1) SSF 822 A, B, C, D, E 0 VS SSFCT2 HVAC TEMPERATURE CONTROLLER (FOR SSF-CP-1) SSF 822 A, B, C, D, E 1 AS PT 0117P AUX STEAM PRESSURE TRANSMITTER (MS-126 & MS-129) TB 796 D 1 BAG BID lAB1 CONTROL BOARD lAB1 AB 822 A, B, C, D, E 1 BAG BD 1AB2 A, B, C, D, E CONTROL BOARD 1AB2 AB 822 1 BAG BD 1AB3 CONTROL BOARD 1AB3 AB 822 A, B, C, D, E 1 BAG BD 1UB1 CONTROL BOARD 1UB1 AB 822 A, B, C, D, E Page 4 of 23

Attachment 1

~'-Oconee Unit 1, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 BAG BD 1UB2 CONTROL BOARD 1UB2 AB 822 A, B, C, D, E 1 BAG BD 1VB1 CONTROL BOARD IVB1 AB 822 A, B, C, D, E 1 BAG BD 1VB2 CONTROL BOARD 1VB2 AB 822 A, B, C, D, E 1 BAG BD 1VB3 CONTROL BOARD lVB3 AB 822 A, B, C, D, E 1 BS PS 0018 RB PRESS SWITCH (ES CH 1A) (CHANNEL 7) AB 809 E 1 BS PS 0019 RB PRESS SWITCH (ES CH 1A) (CHANNEL 8) AB 809 E 1 BS PS 0020 RB PRESS SWITCH (ES CH 1B) (CHANNEL 7) AB 809 E 1 BS PS 0021 RB PRESS SWITCH (ES CH 1B) (CHANNEL 8) AB 809 E 1 BS PS 0022 RB PRESS SWITCH (ES CH 1C) (CHANNEL 7) AB 809 E 1 BS PS 0023 RB PRESS SWITCH (ES CH 1C) (CHANNEL 8) AB 809 E 1 BS PT 0004P RB PRESS XMTR (ES CH 1A) AB 809 E 1 BS PT 0005P RB PRESS XMTR (ES CH 1B) AB 809 E 1 BS PT 0006P RB PRESS XMTR (ES CH 1C) AB 809 E 1 BS PU 0001 RBS PUMP 1A AB 758 E 1 BS PU 0002 RBS PUMP 1B AB 758 E 1 BS VA 0001 RB SPRAY HEADER 1A ISOLATION AB 809 E 1 BS VA 0002 RB SPRAY HEADER 1B ISOLATION AB 809 E 1 BS VA 0003 RBS PUMP SUCTION ISOL AB 758 E 1 BS VA 0004 RBS PUMP SUCTION ISOL AB 758 E 1 C CD OOOA CONDENSER 1A TB 775 D 1 C CD ODOB CONDENSER 1B TB 775 D 1 C CD OOOC CONDENSER IC TB 775 D 1 C DM OOOA POLISHING DEMINERALIZER 1A TB 775 D 1 C DM 000B POLISHING DEMINERALIZER 1B TB 775 D 1 C DM O0OC POLISHING DEMINERALIZER IC TB 775 D 1 C DM 0DOD POLISHING DEMINERALIZER ID TB 775 D 1 C DM OOOE POLISHING DEMINERALIZER 1E TB 775 D 1 C HX 002A CONDENSATE COOLER 1A TB 775 D 1 C HX 0028 CONDENSATE COOLER 1B TB 775 D 1 C LT 001SA UST 1B LEVEL TB 838 D 1 C LT 0036 UST 1A LEVEL TB 838 D 1 C PS 0015 UST MAKEUP LEVEL CONTROL (PS-15) TB 838 D 1 C PS 0036 UST MAKEUP LEVEL CONTROL (PS-36) TB 838 D 1 C PS 0227 CONDENSATE BOOSTER PUMP SUCTION HEADER PRESS LOW TB 775 D 1 C PU 0010 HOTWELL PUMP 1A TB 775 D 1 C PU 0011 HOTWELL PUMP 1B TB 775 D 1 C PU 0012 HOTWELL PUMP 1C TB 775 D 1 C PU 0019 HOLDING PUMP 1A TB 775 D 1 C PU 0020 HOLDING PUMP 1B TB 775 D 1 C PU 0021 HOLDING PUMP IC TB 775 D 1 C PU 0022 HOLDING PUMP 1D TB 775 D 1 C PU 0023 HOLDING PUMP 1E TB 775 D 1 C SV 1920 SOLENOID VLV TO HOTWELL NORMAL MAKEUP CONTROL- VALVE 1C- TB 775 D 1 C TK 0003 SLURRY TANK TB 775 D Page 5 of 23

Attachment 1 Oconee Unit 1, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 C TK OOOA UPPER SURGE TANK 1A TB 838 D 1 C TK 000B UPPER SURGE TANK 1B TB 838 D 1 C TK 000C UPPER SURGE TANK DOME TB 838 D 1 C VA 0192 HOTWELL NORMAL MAKEUP CONTROL TB 775 D 1 C VA 0391 HOTWELL SUPPLY ISOL TO TDEFW TB 775 D 1 CC HX OOOA COMPONENT COOLER 1A AB 783 A 1 CC FT 0225 SSF ASW FLOW AB 796 D 1 CC PL 0268 REMOTE STARTER ENCLOSURE FOR 1CCW-268 SSF 754 D 1 CC PL 0287 REMOTE STARTER ENCLOSURE FOR 1CCW-287 SSF 758 D 1 CC PU 0001 CCW PUMP 1A INT 810 D,A 1 CC PU 0002 CCW PUMP 1B INT 810 D,A 1 CC PU 0003 CCW PUMP iC INT 810 D,A 1 CC PU 0004 CCW PUMP 1D INT 810 D,A 1 CC PU 0024 EFWPT OIL COOLER PUMP TB 775 C 1 CC VA 0268 SSF ASW PUMP DISCH ISOL SSF 754 D 1 CC VA 0269 CROSSOVER ISOLATION TO A RB 777 D 1 CC VA 0287 SSF ISOL VALVE SSF 754 D 1 CF TK O00A CORE FLOOD TANK 1A RB 797 B, D 1 CF TK 000B CORE FLOOD TANK 1B RB 817 B,D 1 CRD CA 0001 CRD AC REACTOR TRIP BREAKER CABINET AB 809 A 1 CRD CA CC01 CONTROL CABINET 1 AB 809 A 1 CRD CA CC02 CONTROL CABINET 2 AB 809 A 1 CRD CA CC1 DCRDCS CONTROL CABINET CC-1 AB 809 A 1 CRD CA CC2 DCRDCS CONTROL CABINET CC-2 AB 809 A 1 CRD CA CC3 DCRDCS CONTROL CABINET CC-3 AB 809 A 1 CRD CA CC4 DCRDCS CONTROL CABINET CC-4 AB 809 A 1 CRD CA CC5 DCRDCS CONTROL CABINET CC-5 AB 809 A 1 CRD CA CC6 DCRDCS CONTROL CABINET CC-6 AB 809 A 1 CRD CA SRPSCC1 DCRDCS CONTROL CABINET SRPS CC1 AB 809 A 1 CRD CA SRPSCC2 DCRDCS CONTROL CABINET SRPS CC2 AB 809 A 1 CS VA 0005 QUENCH TANK DRAIN RB 777 A, B,C 1 CS VA 0006 QUENCH TANK DRAIN AB 758 A, B,C 1 EHC CA EHC1 EHC CAB 1EHC1 AB 809 D 1 EHC CA EHC2 EHC CAB 1EHC2 AB 809 D 1 EHC CA EHC3 EHC CAB 1EHC3 AB 809 D 1 EHC CA EHTC1 EHC TERM CAB 1EHTC1 AB 809 D 1 EHC SV 1083 MASTER TRIP SOLENOID VALVE A TB 809 D 1 EHC SV 1084 MASTER TRIP SOLENOID VALVE B TB 809 D 1 EL BA 1CA CONTROL BATT 1CA AB 809 A, B,C, D, E 1 EL BA 1CB CONTROL BATT 1CB AB 809 A, B,C, D, E 1 EL BA 1PA PWR BATT 1PA TB 796 A, B,C, D,E 1 EL BA 1PB PWR BATT 1PB TB 796 A,B,C,D,E 1 EL BC 1CA CONTROL BATT CHGR 1CA AB 796 A, B,C, D,E 1 EL BC 1CB CONTROL BATT CHGR 1CB AB 796 A,B,C,D,E Page 6 of 23

Attachment 1 Oconee Unit 1, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 EL BC IPA PWR BATT CHGR IPA TB 796 A, B, C, D, E 1 EL BC 1PB PWR BATT CHGR 1PB TB 796 A, B, C, D, E 1 EL BI 1DIA 120V STATIC INV 1DIA AB 796 A, B, C, D, E 1 EL BI 1DIB 120V STATIC INV 1DIB AB 796 A, B, C, D, E 1 EL BI 1DIC 120V STATIC INV 1DIC AB 796 A, B, C, D, E 1 EL BI IDID 120V STATIC INV 1DID AB 796 A, B, C, D, E 1 EL BI 1KI STATIC INVERTER 1KI (INCLUDES STATIC XFER SW) AB 796 A, B, C, D, E 1 EL BI 1KU STATIC INVERTER 1KU (INCLUDES STATIC XFER SWITCH) AB 796 A, B, C, D, E 1 EL BI 1KX STATIC INVERTER 1KX (INCLUDES STATIC XFER SWITCH) AB 796 A, B, C, D, E 1 EL BK 1A 240/120V 1A REGULATOR OUTPUT BKR AB 796 A, B, C, D, E 1 EL BK 1B 240/120V lB REGULATOR OUTPUT BKR AB 796 A, B, C, D, E 1 EL BS 230CT1 CT1 OVERHEAD FEEDER (SWYD PCB 18 TO CT1) SYD 796 A, B, C, D, E 1 EL BS 4160CTI CT1 4160V STARTUP BUS UNIT 1,FROM TRANSFORMER CT1 TB 796 A, B, C, D, E 1 EL BS 4160MFB1 4160V MAIN FEEDER BUS 1, 311, (BITTO lTC,ITD,1TE) TB 796 A, B, C, D, E 1 EL BS 4160MFB2 4160V MAIN FEEDER BUS 2, B21, (BIT TO 1TC,1TD,1TE) TB 796 A, B, C, D, E 1 EL CA 1AT3 AREA TERM CAB 1AT3 AB 809 A, B, C, D, E 1 EL CA 1AT4 AUXILIARY BENCHBOARD lAB1 TERMINAL CABINET # 1AT4 AB 809 A, B, C, D, E 1 EL CA 1ATS AREA TERM CAB 1AT5 AB 809 A, B, C, D, E 1 EL CA 1AT8 AREA TERM CAB 1AT8 AB 809 A, B, C, D, E 1 EL CA 1AXTC2 AUX TERMINAL CABINET 1AXTC2 TB 796 A, B, C, D, E 1 EL CA 1EB1 ELECTRICAL BOARD 1EB1 AB 822 A, B, C, D, E 1 EL CA 1EB2 ELECTRICAL BOARD 1EB2 AB 822 A, B, C, D, E 1 EL CA 1EB3 ELECTRICAL BOARD 1EB3 AB 822 A, B, C, D, E 1 EL CA 1EB4 ELECTRICAL BOARD 1EB4 AB 822 A, B, C, D, E 1 EL CA 1EB5 ELECTRICAL BOARD 1EBS AB 822 A, B, C, D, E 1 EL CA 1EB6 ELECTRICAL BOARD 1EB6 AB 822 A, B, C, D, E 1 EL CA 1EB7 ELECTRICAL BOARD 1EB7 AB 822 A, B, C, D, E 1 EL CA 1EB8 ELECTRICAL BOARD lEBB AB 822 A, B, C, D, E 1 EL CA lEF1 ELECTRICAL BOARD 1EF1 AB 822 A, B, C, D, E 1 EL CA 1EF2 ELECTRICAL BOARD 1EF2 AB 822 A, B, C, D, E 1 EL CA 1EF3 ELECTRICAL BOARD 1EF3 AB 822 A, B, C, D, E 1 EL CA 1EF4 ELECTRICAL BOARD 1EF4 AB 822 A, B, C, D, E 1 EL CA 1EF5 ELECTRICAL BOARD 1EF5 AB 822 A, B, C, D, E 1 EL CA IEF6 ELECTRICAL BOARD IEF6 AB 822 A, B, C, D, E 1 EL CA 1EF7 ELECTRICAL BOARD 1EF7 AB 822 A, B, C, D, E 1 EL CA 1EF8 ELECTRICAL BOARD 1EF8 AB 822 A, B, C, D, E 1 EL CA 1MTC1 MISC TERM CAB 1MTC1 AB 809 A, B, C, D, E 1 EL CA 1MTC2 MISC TERM CAB 1MTC2 AB 809 A, B, C, D, E 1 EL CA 1MTC3 MISC TERM CAB 1MTC3 AB 809 A, B, C, D, E 1 EL CA IMTC4 MISC TERM CAB 1MTC4 AB 809 A, B, C, D, E 1 EL CA 1TTC5 TURB TERM CAB lTTC5 TB 796 A, B, C, D, E 1 EL CA 1TTC6 TURB TERM CAB 1nTC6 TB 796 A, B, C, D, E 1 EL CA SGLC1 STEAM GEN LOGIC CABINET AB 809 A, B, C, D, E 1 EL DI 1ADA ISOL DIODE ASSEMBLY 1ADA AB 796 A, B, C, D, E Page 7 of 23

Attachment 1

Oconee Unit 1, SWEL-1, Base 1 Equiplrient List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 EL DI 1ADB [SOL DIODE ASSEMBLY 1ADB AB 796 A, B, C, D, E 1 EL DI 1ADC ISOL DIODE ASSEMBLY 1ADC AB 796 A, B, C, D, E 1 EL DI 1ADD ISOL DIODE ASSEMBLY 1ADD AB 796 A, B, C, D, E 1 EL DI lADE ISOL DIODE ASSEMBLY lADE AB 796 A, B, C, D, E 1 EL DI 1ADF ISOL DIODE ASSEMBLY 1ADF AB 796 A, B, C, D, E 1 EL DI 1ADG ISOL DIODE ASSEMBLY 1ADG AB 796 A, B, C, D, E 1 EL IR MC20 INSTRUMENT RACK 1MC-M20 TB 796 D 1 EL IR MCD24 INSTRUMENT RACK 1MC-D24 TB 775 D 1 EL IR MCE16 INSTRUMENT RACK 1MC-E16 TB 796 D 1 EL IR MCE25 INSTRUMENT RACK 1MC-E25 TB 775 D 1 EL IR PIR UNIT 1 PNEUMATIC INSTR RACK AB 809 B 1 EL LX 1Xi 600V LC lXO1 TB 796 A, B, C, D, E 1 EL LX iXi1 600V LC 1X10 TB 796 A, B, C, D, E 1 EL LX 1X2 600V LC 1X02 TB 796 A, B, C, D, E 1 EL LX lX4 600V LC 1X04 TB 796 A, B, C, D, E 1 EL LX 1X5 600V LC IX05 TB 796 A, B, C, D, E 1 EL LX 1X6 600V LC IX06 TB 796 A, B, C, D, E 1 EL LX 1X7 600V LC 1X07 TB 796 A, B, C, D, E 1 EL LX 1X8 600V LC 1X08 AB 796 A, B, C, D, E 1 EL LX 1X9 600V LC 1X09 AB 796 A, B, C, D, E 1 EL MX IXA MCC 1XA TB 796 D 1 EL MX 1XAA 208V MCC 1XA-A TB 796 D 1 EL MX 1XB 600V MCC 1XB TB 775 D 1 EL MX 1XC MCC 1XC TB 775 D 1 EL MX IXE MCC IXE TB 775 D 1 EL MX 1XGA MCC 1XGA TB 796 D 1 EL MX 1XGB MCC 1XGB TB 796 D 1 EL MX 1XI 600V MCC iXI AB 809 D 1 EL MX 1XJ 600V MCC 1XJ AB 809 D 1 EL MX 1XL MCC 1XL AB 771 A, B, C 1 EL MX 1XN MCC 1XN AB 771 A, B, C 1 EL MX lXO MCC lXO AB 796 A, B, C, D, E 1 EL MX 1XP MCC 1XP AB 796 A, B, C, D, E 1 EL MX 1XR 600V MCC 1XR AB 838 A 1 EL MX 1XS1 MCC 1XS1 AB 796 A, B, C, D, E 1 EL MX 1XS2 MCC 1XS2 AB 796 A, B, C, D, E 1 EL MX 1XS3 MCC lXS3 AB 796 A, B, C, D, E 1 EL MX 1XSF MCC 1XSF(60OV) SSF 817 A, B, C, D, E 1 EL MX 1XSF1 MCC 1XSF-1 (208V) SSF 797 A, B, C, D, E 1 EL MX 1XSFA MCC IXSF(208V) SSF 817 A, B, C, D, E 1 EL PL 1CPS I POWDEX PANEL TB 775 D 1 EL PL 1DCA 125V DC 1DCA AB 796 A, B, C, D, E 1 EL PL 1DCB 125V DC 1DCB AB 796 A, B, C, D, E 1 EL PL 1DIA 125V PPB 1DIA AB 809 A, B, C, D, E Page 8 of 23

Attachment 1 Oconee Unit 1, SWEL-1, Base1 Equipment List Unit Sys Type Number Description Bldg. FL.EL Safety Function 1 EL PL 1DIB 125V PPB IDIB AB 809 A, B, C, D, E 1 EL PL IDIC 125V PPB IDIC AB 809 A, B, C, D, E 1 EL PL 1DID 125V PPB 1DID AB 809 A, B, C, D, E 1 EL PL 1DL2 250V DC 1DL2 PPB AB 796 A, B, C, D, E 1 EL PL 1DP 125/250V DC 1DP TB 796 A, B, C, D, E 1 EL PL 1EPSLP1 EPSL PANEL 1EPSLP1 AB 809 A, B, C, D, E 1 EL PL 1EPSLP2 EPSL PANEL 1EPSLP2 AB 809 A, B, C, D, E 1 EL PL IKA 120V PPB 1KA TB 775 A, B, C, D, E 1 EL PL 1KC 120V PPB 1KC TB 796 A, B, C, D, E 1 EL PL 1KE 120V PPB 1KE AB 796 A, B, C, D, E 1 EL PL 1KESP KEOWEE EM START PANEL AB 809 A, B, C, D, E 1 EL PL 1KG 120V PPB 1KG AB 838 A, B, C, D, E 1 EL PL 1KI 120V PPB 1KI AB 809 A, B, C, D, E 1 EL PL 1KRA 120V PPB 1KRA AB 809 A, B, C, D, E 1 EL PL 1KRB 120V PPB 1KRB AB 809 A, B, C, D, E 1 EL PL 1KSG 208/120V POWER PANELBOARD 1KSG TB 796 A, B, C, D, E 1 EL PL 1KSGO1 Remote Starter Cabinet for 1KSG-01 TB 796 A, B, C, D, E 1 EL PL 1KSGO2 Remote Starter Cabinet for 1KSG-02 TB 796 A, B, C, D, E 1 EL PL 1KSG03 Remote Starter Cabinet for 1KSG-03 TB 796 A, B, C, D, E.

1 EL PL 1KSG04 Remote Starter Cabinet for 1KSG-04 TB 796 A, B, C, D, E 1 EL PL 1KU 120V PPB 1KU AB 809 A, B, C, D, E 1 EL PL 1KVIA 120V PPB 1KVIA AB 809 A, B, C, D, E 1 EL PL 1KVIB 120V PPB IKVIB AB 809 A, B, C, D, E 1 EL PL 1KVIC 120V PPB 1KVIC AB 809 A, B, C, D, E 1 EL PL 1KVID 120V PPB 1KVID AB 809 A, B, C, D, E 1 EL PL 1KX 120V PPB 1KX AB 809 A, B, C, D, E 1 EL PL 1L2 120V PPB 1L2 AB 771 A, B, C, D, E 1 EL PL 1L21 125V DC PPB IL21 AB 822 A, B, C, D, E 1 EL PL 1SGFP SG FWP PANEL TB 775 A, B, C, D, E 1 EL PL 1SGFSP BIT FAN SPEED CABINET TB 796 A, B, C, D, E 1 EL PL 1SKJ 120V PPB 1SKJ AB 809 A, B, C, D, E 1 EL PL 1SKK 120V PPB 1SKK AB 809 A, B, C, D, E 1 EL PL 1SKL 120V PPB 1SKL AB 809 A, B, C, D, E 1 EL PL 1SKM 240/120V PPB 1SKM ESV 797 A, B, C, D, E 1 EL PL 1SKN 240/120V PPB 1SKN ESV 797 A, B, C, D, E 1 EL PL 1SKP 240/120V PPB 1SKP ESV 797 A, B, C, D, E 1 EL PL 1TCPA TURB CONT PANEL 1TCPA TB 796 A, B, C, D, E 1 EL PL 1TDC3 TRANSDUCER CAB 1TDC3 AB 809 A, B, C, D, E 1 EL PL HBP UNIT 1 HEATER BLANKETING PANEL TB 822 D 1 EL PL MFBMRP MAIN FDR BUS MONITOR RLY PANEL AB 809 A, B, C, D, E 1 EL PL PZR1B 600V PPB lB (FOR PRESSURIZER HEATERS GROUP 1B BANK 2) RB 817 A, B, C, E 1 EL SH 1TC01 1TC BUS 2 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 1 EL SH 1TC14 1TC BUS 1 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 1 EL SH 1TDO1 lTD BUS 2 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E Page 9 of 23

Attachment 1 Oconee Unit 1, SWEL 4Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 EL SH 1TD14 lTD BUS 1 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 1 EL SH ITE01 1TE BUS 2 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 1 EL SH 1TE14 1TE BUS 1 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 1 EL SH BITO1 Ell MFB1 STARTUP FDR SECTION BH1 796 A, B, C, D, E 1 EL SH BlT02 BIT INSTRUMENTATION SECTION BH1 796 A, B, C, D, E 1 EL SH BIT03 Nll MFB1 NORMAL FDR BKR SECTION BH1 796 A, B, C, D, E 1 EL SH BlT04 B HPSW PUMP BREAKER SECTION BH1 796 A, B, C, D, E 1 EL SH B1T06 Si UNIT 1 STBY BUS 1 TO MFB1 BKR SECTION BH1 796 A, B, C, D, E 1 EL SH B2T08 S21 STDBY BUS TO MFB2 BKR SECTION BH1 796 A, B, C, D, E 1 EL SH B2T1O A HPSW PUMP BREAKER SECTION BH1 796 A, B, C, D, E 1 EL SH B2T11 N21 MFB2 NORMAL FDR BKR SECTION BH1 796 A, B, C, D, E 1 EL SH B2T12 B2T INSTRUMENTATION SECTION BH1 796 A, B, C, D, E 1 EL SH B2T13 E21 MFB2 STARTUP FDR BKR SECTION BH1 796 A, B, C, D, E 1 EL SX 1KIBKUP BACKUP TRANSFER SWITCH iKI AB 796 A, B, C, D, E 1 EL SX IKIBYP INVERTER BYPASS SWITCH 1KI AB 796 A, B, C, D, E 1 EL SX 1KUBKUP BACKUP TRANSFER SWITCH 1KU AB 796 A, B, C, D, E 1 EL SX 1KUBYP INVERTER BYPASS SWITCH 1KU AB 796 A, B, C, D, E 1 EL SX 1KXBKUP BACKUP TRANSFER SWITCH 1KX AB 796 A, B, C, D, E 1 EL SX 1KXBYP INVERTER BYPASS SWITCH 1KX AB 796 A, B, C, D, E 1 EL SX ABXFER 1A/1B REG XFER SW AB 796 A, B, C, D, E 1 EL TF OCTI XFMR CT-1 YD 796 A, B, C, D, E 1 EL TF 1A XFMR 1A (600V TO 240V) AB 796 A, B, C, D, E 1 EL TF lB XFMR 1B (600V TO 240V) AB 796 A, B, C, D, E 1 EL TF 1KC XFMR 1KC (600:208:120V) TB 796 A, B, C, D, E 1 EL TF iKI ISOLATION XFMR SHIELDED 1KI AB 796 A, B, C, D, E 1 EL TF 1KSG 600/120V PPB 1KSG TRANSFORMER TB 796 A, B, C, D, E 1 EL TF 1KU ISOLATION XFMR SHIELDED lKU AB 796 A, B, C, D, E 1 EL TF IXA XFMR iXA TB 796 A, B, C, D, E 1 EL TF lXC XFMR 1XC (600V TO 208V) TB 775 A, B, C, D, E 1 EL TF 1XGA XFMR 1XGA TB 796 A, B, C, D, E 1 EL TF 1XGB XFMR lXGB TB 796 A, B, C, D, E 1 EL TF 1XL XFMR lXL (600V TO 208V) AB 771 A, B, C, D, E 1 EL TF 1XN XFMR lXN (600V TO 208V) AB 771 A, B, C, D, E 1 EL TF lXO XFMR 1XO (600V TO 208V) AB 796 A, B, C, D, E 1 EL TF 1XP XFMR 1XP (600V TO 208V) AB 796 A, B, C, D, E 1 EL TF 1XR XFMR lXR (600V/208V) AB 838 A, B, C, D, E 1 EL TF 1XSIA XFMR 1XS1A (600VTO 208V) AB 796 A, B, C, D, E 1 EL TF 1XS2A XFMR 1XS2A (600V TO 208V) AB 796 A, B, C, D, E 1 EL TF IXS3A XFMR 1XS3A (600V TO 208V) AB 796 A, B, C, D, E 1 EL TF 1XSF XFMR 1XSF (600V TO 208V) SSF 817 A, B, C, D, E 1 EL TN 0329 TERMINAL BOX TB-329 AB 783 B 1 EL TN 0377 TERMINAL BOX TB-377 TB 796 D 1 EL TN 0417 TERMINAL BOX TB-417 AB 809 D 1 EL TN 0418 TERMINAL BOX TB-418 AB 809 D Page 10 of 23

Attachment 1 Oconee Unitl-, WEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FL EL Safety Function 1 EL VR OOOA REGULATED PWR SUPP REG 1A AB 796 A, B, C, D, E 1 EL VR 000B REGULATED PWR SUPP REG 1B AB 796 A, B, C, D, E 1 ES CA 1ESTC1 ESFAS ODD CH TERM CAB 1ESTC1 AB 809 A, B, C, D, E 1 ES CA 1ESTC2 ESFAS EVEN CH TERM CAB 1ESTC2 AB 809 A, B, C, D, E 1 ES CA 1ESTC2A ESFAS AUX RLY CAB 1ESTC2A AB 809 A, B, C, D, E 1 ES CA 1ESTC3 ESFAS EVEN/ODD TERM CAB 1ESTC3 AB 809 A, B, C, D, E 1 ESV CA 1ESV1 ESV PUMP CONTROLS RELAY CABINET 1ESV1 AB 796 D 1 ESV PL 0001 UNIT 1 ESV LOCAL CONTROL PANEL ESV 797 D 1 ESV PT 0001 ESV Tank Pressure Transmitter ESV 797 D 1 ESV PT 0002 ESV Tank Pressure Transmitter ESV 797 D 1 ESV PU 0001 ESV Pump 1A ESV 797 D 1 ESV PU 0002 ESV Pump 1B ESV 797 D 1 ESV PU 0003 ESV Pump 1C ESV 797 D 1 ESV TF 0001 600/240/120V PPB 1SKM MAIN TRANSFORMER ESV 797 D 1 ESV TF 0002 600/240/120V PPB 1SKN MAIN TRANSFORMER ESV 797 D 1 ESV TF 0003 600/240/120V PPB 1SKP MAIN TRANSFORMER ESV 797 D 1 ESV TK 0001 ESV Receiver Tank 1A ESV 797 D 1 ESV TK 0002 ESV Receiver Tank 1B ESV 797 D 1 ESV VA 0001 ESV Float Valve YD 797 D 1 ESV VA 0002 ESV Float Valve YD 797 D 1 ESV VA 0028 ESV Tank Min. Flow Valve ESV 797 D 1 ESV VA 0029 ESV Tank Min. Flow Valve ESV 797 D 1 FD FT 0129 1A EFW HEADER FLOW AB 783 D 1 FD FT 0130 1B EFW HEADER FLOW AB 796 D 1 FD FT 0153 1A EFW HEADER FLOW TRANSMITTER AB 783 D 1 FD FT 0154 1B EFW HEADER FLOW TRANSMITTER AB 783 D 1 FD LT 0066 S/G 1A LEVEL RB 777 D 1 FD LT 0067 S/G 1B LEVEL RB 777 D 1 FD LT 0080 SG 1A LEVEL TRANSMITTER RB 777 D 1 FD LT 0081 SG 1B LEVEL TRANSMITTER RB 777 D 1 FD LT 0082 SG 1A LEVEL TRANSMITTER RB 777 D 1 FD LT 0083 SG 1B LEVEL TRANSMITTER RB 777 D 1 FD PL 0368 REMOTE STARTER ENCLOSURE FOR 1FDW-368 AB 809 D 1 FD PL 0369 REMOTE STARTER ENCLOSURE FOR 1FDW-369 AB 809 D 1 FD PL 0372 REMOTE STARTER ENCLOSURE FOR 1FDW-372 AB 809 D 1 FD PL 0374 REMOTE STARTER ENCLOSURE FOR 1FDW-374 AB 809 D 1 FD PL 0382 REMOTE STARTER ENCLOSURE FOR 1FDW-382 AB 809 D 1 FD PL 0384 REMOTE STARTER ENCLOSURE FOR 1FDW-384 AB 809 D 1 FD PL ATWSCP Ul ATWS CONTROL PANEL AB 838 D 1 FD PS 0300 1EFPT LOW HYDRAULIC OIL PRESS SWITCH TB 775 C 1 FD PS 0382 FWPT 1A CONTROL OIL PRESS SWITCH TB 775 D 1 FD PS 0383 FWPT 1A CONTROL OIL PRESS LOW TB 775 D 1 FD PS 0384 FWPT 1B CONTROL OIL PRESS SWITCH TB 775- D 1 FD PS 0385 FWPT 1B CONTROL OIL PRESS LOW TB 775 D Page 11 of 23

Attachment 1 Oconee1Ifit 1, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 FD PS 1011 FWP 1A CONTROL OIL PRESSURE SWITCH TB 775 D 1 FD PS 1012 FWP 1B CONTROL OIL PRESS SWITCH TB 775 D 1 FD PU 0003 TDEFW PUMP TB 775 D 1 FD PU 0004 MDEFW PUMP 1A TB , 775 D 1 FD PU 0005 MDEFW PUMP 1B TB 775 D 1 FD SV 0037 STEAM GEN A SAMPLE ISOL VALVE FOR 1FDW-106 AB 809 D 1 FD SV 0038 STEAM GEN B SAMPLE ISOL VALVE FOR 1FDW-108 AB 822 D 1 FD TN 1TBATWS1 ATSW TERM BOX 1 AB 809 D 1 FD TN 1TBATWS2 ATSW TERM BOX 2 AB 809 D 1 FD TN ITBFPT FEEDWATER PUMP TURBINE TERMINAL BOX TB 775 D 1 FD VA 0086 PRESS REG TD PUMP SEALS TB 775 D 1 FD VA 0087 PRESS REG TD PUMP SEALS TB 775 D 1 FD VA 0105 SG 1A SAMPLE ISOLATION RB 808 D 1 FD VA 0106 SG 1A SAMPLE ISOLATION AB 809 D 1 FD VA 0107 SG 1B SAMPLE ISOLATION RB 808 D 1 FD VA 0108 SG 1B SAMPLE ISOLATION AB 809 D 1 FD VA 0129 PRESS REG TD PUMP SEALS TB 775 D 1 FD VA 0218 PRESS REG TD PUMP SEALS TB 775 D 1 FD VA 0315 MDEFW PUMP 1A ISOLATION AB 809 D 1 FD VA 0316 MDEFW PUMP 1B ISOLATION AB 809 D 1 GEN BS IPB ISOLATED PHASE BUS 19KV TB 796 A, B, C, D, E 1 GW VA 0012 QUENCH TANK VENT RB 797 A, B, C 1 GW VA 0013 QUENCH TANK VENT AB 809 A, B, C 1 HP VA 0003 LETDOWN ISOLATION RB 777 B 1 HP VA 0004 LETDOWN ISOLATION RB 797 B 1 HP VA 0005 LETDOWN ISOLATION AB 809 B 1 HP VA 0020 RCP SEAL RETURN ISOLATION RB 808 B 1 HP VA 0021 RCP SEAL RETURN ISOLATION AB 809 B 1 HP VA 0024 BWST SUCTION ISOLATION AB 771 A,B,C 1 HP VA 0025 BWST SUCTION ISOLATION AB 771 A,B,C 1 HP VA 0026 HPI TRAIN 1A INJECTION AB 809 A,B,C 1 HP VA 0027 HPI TRAIN 1B (EMERGENCY) INJECTION AB 809 A,B,C 1 HP VA 0031 RCP SEAL INJ FLOW CONTROL AB 796 B 1 HP VA 0071 SEAL RETURN LINE RELIEF AB 771 B 1 HP VA 0120 RC VOLUME CONTROL AB 809 A,B,C 1 HP VA 0355 HPI AUX SPRAY THROTTLE AB 809 C 1 HP VA 0398 RC MAKEUP PUMP TO RCP SEALS BLOCK RB 777 B 1 HP VA 0409 HPI CROSSOVER ISOLATION AB 809 A,B,C 1 HP VA 0410 HPI CROSSOVER ISOLATION AB 809 A,B,C 1 HP VA 0426 ALT LETDOWN PATH ISOLATION RB 777 A,B 1 HP VA 0428 ALT LETDOWN PATH ISOLATION RB 777 A,B 1 HPI EP 0003 MAKEUP FLOW CONTROL AB 809 A,B,C 1 HPI EP 0031 1HP-31 VALVE POSITIONER (1HP11-E/P) AB 783 B 1 HPI FT 0007A HPI A TRAIN [NJ FLOW TRANS AB 758 A,B,C Page 12 of 23

Attachment 1 O-fi e Unit 1, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 HPI FT 0008A HPI B TRAIN INJ FLOW TRANS AB 758 A,B,C 1 HPI FT 0075 RCP SEAL INJ FLOW TRANSMITTER AB 783 B 1 HPI FT 0101 RC PUMP SEAL INLET FLOW XMTR AB 783 B 1 HPI FT 0102 RC PUMP SEAL INLET FLOW XMTR AB 783 B 1 HPI FT 0103 RC PUMP SEAL INLET FLOW XMTR AB 783 B 1 HPI FT 0104 RC PUMP SEAL INLET FLOW XMTR AB 783 B 1 HPI FT 0157 Ul RC MAKE UP PUMP FLOW RB 777 B 1 HPI FT 0160 B LOOP [NJ FLOW TRANSMITTER AB 809 A,B,C 1 HPI HX OOOA LETDOWN COOLER 1A RB 777 B 1 HPI HX 000B LETDOWN COOLER 1B RB 777 B 1 HPI HX 001A RC SEAL RETURN COOLER 1A AB 771 B 1 HPI HX 001B RC SEAL RETURN COOLER 1B AB 771 B 1 HPI LT 0033P1 LETDOWN STORAGE TANK LEVEL TRAIN 1 AB 771 B 1 HPI LT 0033P2 LETDOWN STORAGE TANK LEVEL TRAIN 2 AB 771 B 1 HPI PL 0409 REMOTE STARTER ENCLOSURE FOR 1HP-409 AB 796 A,B,C 1 HPI PL 0410 REMOTE STARTER ENCLOSURE FOR 1HP-410 AB 796 A,B,C 1 HPI PS 0357 LETDOWN FLOW TEMP HIGH INTERLOCK AB 783 B 1 HPI PU 0001 HPI PUMP 1A AB 758 A,B,C 1 HPI PU 0002 HPI PUMP 1B AB 758 A,B,C 1 HPI PU 0003 HPI PUMP 1C AB 758 A,B,C 1 HPI PU 0005 SSF RC MAKEUP PUMP RB 777 B 1 HPI SV 0090 CONTROLS LETDOWN ISOLATION VALVE FOR 1HP-5 AB 809 B 1 HPI SV 0095 RC PUMP SEAL RETURN ISOLATION VLV FOR 1HP-21 AB 809 B 1 HPI TK 0001 LETDOWN STORAGE TANK AB 771 B 1 HT PL EP04 TRACE HEATING EMERG BKR ALARM PNL 4 AB 771 D 1 HT PL EP05 TRACE HEATING EMERG BKR ALARM PNL 5 AB 771 D 1 HT PL KTH2 TRACE HEATING PNLBD KTH2 AB 771 D 1 HT TF KTH2 FDR TO 208V TRACE HEATING PNLBD KTH2 (600/208) AB 771 D 1 ICC CA 0001A UNIT 1 ICCM TRAIN A CABINET AB 822 A, B, C, D, E 1 ICC CA 0001B UNIT 1 ICCM TRAIN B CABINET AB 822 A, B, C, D, E 1 ICS CA 0001 ICS CABINET 1 AB 822 A, B, C, D, E 1 ICS CA 0002 ICS CABINET 2 AB 822 A, B, C, D, E 1 ICS CA 0003 ICS CABINET 3 AB 822 A, B, C, D, E 1 ICS CA 0004 ICS CABINET 4 AB 822 A, B, C, D, E 1 ICS CA 0005 ICS CABINET 5 AB 822 A, B, C, D, E 1 ICS CA 0006 ICS CABINET 6 AB 822 A, B, C, D, E 1 ICS CA 0007 ICS CABINET 7 AB 822 A, B, C, D, E 1 ICS CA 0008 ICS CABINET 8 AB 822 A, B, C, D, E 1 ICS CA 0009 ICS CABINET 9 AB 822 A, B, C, D, E 1 ICS CA 0010 ICS CABINET 10 AB 822 A, B, C, D, E 1 ICS CA 0011 ICS CABINET 11 AB 822 A, B, C, D, E 1 ICS CA 0012 AUXILIARY SYSTEM CABINET #12 AB 822 A, B, C, D, E 1 ICS CA 0013 AUXILIARY SYSTEM CABINET #13 AB 822 A, B, C, D, E 1 ICS CA 0014 AUXILIARY SYSTEM CABINET #14 AB 822 A, B, C, D, E Page 13 of 23

Attachment 1 SOconee Unit 1, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 ICS PL ASP AUX SHUTDOWN PANEL TB 822 A, B, C, D, E 1 LP VA 0001 LPI DROPLINE ISOL FROM RCS RB 797 B,D 1 LP VA 0002 LPI DROPLINE ISOL FROM RCS RB 797 D 1 LP VA 0003 LPI HOT LEG SUCTION AB 809 D 1 LP VA 0005 LPI PUMP 1A SUCTION AB 758 D 1 LP VA 0006 LPI SUCTION CROSSOVER AB 758 D 1 LP VA 0007 LPI SUCTION CROSSOVER AB 758 D 1 LP VA 0008 LPI PUMP 1B SUCTION AB 758 D 1 LP VA 0009 LPI CROSSOVER AB 758 D 1 LP VA 0010 LPI CROSSOVER AB 758 D 1 LP VA 0012 LPI COOLER 1A ISOLATION AB 771 D 1 LP VA 0014 LPI COOLER 1B ISOLATION AB 771 D 1 LP VA 0017 LPI TRAIN 1A INJECTION ISOLATION AB 809 D 1 LP VA 0018 LPI TRAIN 1B INJECTION ISOLATION AB 809 D 1 LP VA 0069 LPI SWITCHOVER FLOW CONTROL VALVE AB 758 D 1 LP VA 0126 LPI POST ACCIDENT SAMPLE ISOL AB 758 A 1 LPI FT 0004P LPI TRAIN 1B INJ FLOW TRANS (Powered by ICCM) AB 809 D 1 LPI FT 0005P LPI TRAIN 1A INJ FLOW TRANS (Powered by ICCM) AB 809 D 1 LPI HX OOOA LPI COOLER 1A AB 771 D 1 LPI HX OOOB LPI COOLER 1B AB 771 D 1 LPI PU 0001 1LPI PUMP A AB 758 D 1 LPI PU 0002 ILPI PUMP B AB 758 D 1 LPI PU 0003 1LPI PUMP C AB 758 D 1 LPI TE 0209 LPI COOLER 1B OUTLET TEMP (ICS Input) AB 809 D 1 LPI TE 0210 LPI COOLER 1A OUTLET TEMP (ICS Input) AB 771 D 1 LPI TK 0001 BWST YD 796 A,B,C 1 LPS FT 0124 LPI COOLER 1A FLOW XMTR (1LPSW-251) AB 771 D 1 LPS FT 0125 LPI COOLER 1B FLOW XMTR (1LPSW-252) AB 771 D 1 LPS FT 1000 DECAY HEAT COOLER (A) LPSW FLOW (1LPSW-251) AB 771 B,D I LPS FT 1001 DECAY HEAT COOLER B FLOW XMI17ER AB 771 B,D 1 LPS PL 0139 REMOTE STARTER ENCLOSURE FOR 1LPSW-139 AB 796 D 1 LPS SV 0202 MOTOR DRIVEN EFDW PUMP MTR 1A COOLING WATER FLOW TB 775 C 1 LPS SV 0203 MOTOR DRIVEN EFDW PUMP MTR 1B COOLING WATER FLOW TB 775 C 1 LPS SV 1000 SOLENOID VALVE FOR 1LPSW-251 AB 783 D 1 LPS SV 1001 SOLENOID VALVE FOR 1LPSW-252 AB 783 D 1 LPS VA 0004 LPI COOLER 1A ISOLATION VALVE AB 783 D 1 LPS VA 0005 LPI COOLER 1B ISOLATION VALVE AB 783 D 1 LPS VA 0018 RBCU 1A RETURN VALVE AB 809 E 1 LPS VA 0021 RBCU 1B RETURN VALVE AB 809 E 1 LPS VA 0024 RBCU 1C RETURN VALVE AB 809 E 1 LPS VA 0139 Nonessential Header Isolation Valve TB 775 D 1 LPS VA 0251 LPI COOLER 1A CONTROL VALVE AB 783 D 1 LPS VA 0252 LPI COOLER 1B CONTROL VALVE AB 783 D 1 LPS VA 0516 EFW PUMP 1A LPSW ISOLATION VALVE TB 775 C Page 14 of 23

Attachment 1 Oconee Unit 1, SWEL-1, Base 1 Equipment List-Unit Sys Type Number Description Bldg. FLEL Safety Function 1 LPS VA 0525 EFW PUMP 1B LPSW ISOLATION VALVE TB 775 C 1 MS PS 0086 MAIN STEAM PRESS SWITCH (1MS-19) TB 796 D 1 MS PS 0087 MAIN STEAM PRESS SWITCH (1MS-22) TB 796 D 1 MS PS 0088 MAIN STEAM PRESS SWITCH (1MS-28) TB 796 D 1 MS PS 0089 MAIN STEAM PRESS SWITCH (1MS-31) TB 796 D 1 MS PT 0024P SG 1A PRESSURE RB 825 D 1 MS PT 0025P SG 1A PRESSURE RB 825 D 1 MS PT 0026P SG 1B PRESSURE RB 825 D 1 MS PT 0027P SG 1B PRESSURE RB 825 D 1 MS PT 1006 AFIS ANALOG CHANNEL 3 - IA S/G HDR PRESSURE TB 796 D 1 MS PT 1007 AFIS ANALOG CHANNEL 3 - 1B S/G HDR PRESSURE TB 796 D 1 MS PT 1008 AFIS ANALOG CHANNEL 4- 1A S/G HDR PRESSURE TB 796 D 1 MS PT 1009 AFIS ANALOG CHANNEL 4 - 1B S/G HDR PRESSURE TB 796 D 1 MS PY 0042 UNIT 1 UPS (1MSSS0042 - 1MS-87) AB 796 D 1 MS SV 0074 TD EFDWP STEAM ADMISSION SOLENIOD FOR 1MS-93 TB 775 D 1 MS SV 0178 TURB BYPASS CONTROL VLV A SHUTOFF TB 796 D 1 MS SV 0179 TURB BYPASS CONTROL VLV B SHUTOFF TB 796 D 1 MS SV 0180 TURB BYPASS CONTROL VLV C SHUTOFF TB 796 D 1 MS SV 0181 TURB BYPASS CONTROL VLV D SHUTOFF TB 796 D 1 MS VA 0001 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0002 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0003 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0004 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0005 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0006 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0007 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0008 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0009 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0010 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0011 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0012 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0013 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0014 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0015 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0016 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0017 TURBINE BYPASS ISOLATION TB 796 D 1 MS VA 0019 TURBINE BYPASS VALVE TB 796 D 1 MS VA 0022 TURBINE BYPASS VALVE TB 796 D 1 MS VA 0024 AS ISOLATION TB 796 D 1 MS VA 0026 TURBINE BYPASS ISOLATION TB 796 D 1 MS VA 0028 TURBINE BYPASS VALVE TB 796 D 1 MS VA 0031 TURBINE BYPASS VALVE TB 796 D 1 MS VA 0033 AS ISOLATION TB 796 D 1 MS VA 0035 FWPT ISOLATION TB 796 D Page 15 of 23

Attachment 1 Oconee Unit 1, SWEL-1, Base 1 Equiprnent- List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 MS VA 0036 FWPT ISOLATION TB 796 D 1 MS VA 0040 FWPT 1A STOP VALVE (MS-40/SV12) TB 775 D 1 MS VA 0043 FWPT 1B STOP VALVE (MS-43/SV12) TB 775 D 1 MS VA 0047 MS TO CSAE TB 796 D 1 MS VA 0076 MS RH ISOLATION TB 796 D 1 MS VA 0077 MS TO 2ND STAGE RHTR ISOL TB 796 D 1 MS VA 0078 MS TO 2ND STAGE RHTR ISOL TB 796 D 1 MS VA 0079 MS RH ISOLATION TB 796 D 1 MS VA 0080 MS TO 2ND STAGE RHTR ISOL TB 796 D 1 MS VA 0081 MSTO 2ND STAGE RHTR ISOL TB 796 D 1 MS VA 0093 TDEFW MS ISOLATION VALVE TB 775 D 1 MS VA 0095 TD EFDWP GOVERNOR VALVE TB 775 D 1 MS VA 0102 TURBINE STOP VALVE # 4 TB 796 D 1 MS VA 0103 TURBINE STOP VALVE # 3 TB 796 D

.1 MS VA 0104 TURBINE STOP VALVE # 2 TB 796 D 1 MS VA 0105 TURBINE STOP VALVE # 1 TB 796 D 1 MS VA 0106 MAIN STEAM CONTROL VALVE TB 796 D 1 MS VA 0107 MAIN STEAM CONTROL VALVE TB 796 D 1 MS VA 0108 MAIN STEAM CONTROL VALVE TB 796 D 1 MS VA 0109 MAIN STEAM CONTROL VALVE TB 796 D 1 MS VA 0112 MS TO 2ND STAGE RHTR ISOL TB 796 D 1 MS VA 0126 MS TO AS CONTROL VALVE TB 796 D 1 MS VA 0129 MS TO AS CONTROL VALVE TB 796 D 1 MS VA 0173 MS TO 2ND STAGE RHTR ISOL TB 796 D 1 N TK 0003 NITROGEN SUPPLY FOR 1FDW-315 & 1FDW-316 AB 838 D 1 N TK 0004 NITROGEN SUPPLY FOR 1FDW-315 & 1FDW-316 AB 838 D 1 N TK 0005 NITROGEN SUPPLY FOR 1MS-87 TB 796 D 1 N TK 0006 NITROGEN SUPPLY FOR 1MS-126 TB 796 D 1 N TK 0007 NITROGEN SUPPLY FOR 1MS-129 TB 796 D 1 PA CA 0001 POST ACCIDENT LIQUID SAMPLING PANEL AB 771 A 1 PA LT 0090 RB CONTAINMENT WATER LVL TR A RB 777 A 1 PA LT 0091 RB CONTAINMENT WATER LVL TR B RB 777 A 1 PA P 0304 RB CONT WATER LVL IND TR A AB 822 A 1 PPS CA 0001 RPS A/ES Al AB 822 A, B, C, D, E 1 PPS CA 0002 RPS A/ES Al AB 822 A, B, C, D, E 1 PPS CA 0003 RPS B/ES B1 AB 822 A, B, C, D, E 1 PPS CA 0004 RPS B/ES B1 AB 822 A, B, C, D, E 1 PPS CA 0005 RPS C/ES C1 AB 822 A, B, C, D, E 1 PPS CA 0006 RPS C/ES C1 AB 822 A, B, C, D, E 1 PPS CA 0007 RPS D AB 822 A, B, C, D, E 1 PPS CA 0008 RPS D AB 822 A, B, C, D, E 1 PPS CA 0009 ES A2 AB 822 A, B, C, D, E 1 PPS CA 0010 ES B2 AB 822 A, B, C, D, E 1 PPS CA 0011 ES C2 AB 822 A, B, C, D, E Page 16 of 23

Attachment 1 Oconee Unit 1, SWEL-1, Base 1-Equi-pment List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 PPS CA 0012 ES VOTER ODD AB 822 A, B, C, D, E 1 PPS CA 0013 ES VOTER ODD AB 822 A, B, C, D, E 1 PPS CA 0014 ES VOTER EVEN AB 822 A, B, C, D, E 1 PPS CA 0015 ES VOTER EVEN AB 822 A, B, C, D, E 1 PPS CA 0016 RPS E/MSI AB 822 A,B,C,D,E 1 PPS CA 0017 ES STATUS ODD AB 822 A,B,C,D,E 1 PPS CA 0018 ES STATUS EVEN AB 822 A,B,C,D,E 1 RBC AH 0020A RBCU FAN 1A RB 825 E 1 RBC AH 0020B RBCU FAN 1B RB 825 E 1 RBC AH 0020C RBCU FAN IC RB 825 E 1 RBC HX O00A RB COOLING UNIT 1A RB 817 E 1 RBC HX OOOAAUX AUX RBCU A RB 844 E 1 RBC HX 000B RB COOLING UNIT 18 RB 817 E 1 RBC HX O0OBAUX AUX RBCU B RB 861 E 1 RBC HX O00C RB COOLING UNIT IC RB 817 E 1 RBC HX O0OCAUX AUX RBCU C RB 844 E 1 RBC HX O0ODAUX AUX RBCU D RB 844 E 1 RC LT 0004P1 PRZ LEVEL TRANSMITTER RB 797 B,C 1 RC LT 0004P3 PRZ LEVEL TRANSMITTER RB 797 B,C I RC LT 0123 1A RCS HOT LEG LVL (ICCM A) AB 809 B 1 RC LT 0124 1B RCS HOT LEG LVL (ICCM B) AB 809 B 1 RC LT 0125 RV HEAD LEVEL (ICCM A) AB 809 B 1 RC LT 0126 RV HEAD LEVEL (ICCM B) AB 809 B 1 RC PL iRCi 1RC-1 SPRAY VALVE CONTROL BOX AB 796 B 1 RC PT 0017P RCS LOOP A PRESS TRANS RB 825 C 1 RC PT 0021P RC PRESS XMTR (ES CH A) RB 825 B 1 RC PT 0022P RC PRESS XMTR (ES CH B) RB 825 B 1 RC PT 0023P RC PRESS XMTR (ES CH C) RB 825 B 1 RC PT 0166P RCS LOOP B PRESS TRANS RB 825 C 1 RC PT 0225 Ul RC LOOP A PRESSURE RB 825 C,D 1 RC PT 0226 Ul RC LOOP B PRESSURE RB 819 C,D 1 RC PT 0244 WR RCS PRESS TRAIN A (ICCM) AB 809 C,D 1 RC PT 0245 WR RCS PRESS TRAIN B (ICCM) AB 809 C,D 1 RC RD 0005B A2 COLD LEG RTD RB 797 C,D 1 RC RD O006A Al COLD LEG RTD RB 797 C,D 1 RC RD 0007B B2 COLD LEG RTD RB 797 C,D 1 RC RD 0008A BI COLD LEG RTD RB 797 C,D 1 RC RD 0043A PRZ RTD RB 808 B,C 1 RC RD 0043B PRZ RTD RB 808 B,C 1 RC RD 0084A REACTOR OUTLET LOOP 1A RB 844 C,D 1 RC RD 0084B A HOT LEG WIDE RANGE RTD RB 844 C,D 1 RC RD 0085A REACTOR OUTLET LOOP 1B RB 844 C,D 1 RC RD 0085B B HOT LEG WIDE RANGE RTD RB 844 C,D 1 RC SV 0036 RC SAMPLE LINE ISOLATION VALVE (1RC7) AB 809 B Page 17 of 23

Attachment 1 Oconee Unit 1, SWEL-1, Bes61 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 RC SV 0231 CONTROLS POST ACC. SAM. VLV(1RC-179) AB 758 A 1 RC VA 0001 PRESSURIZER SPRAY VALVE RB 853 C 1 RC VA 0003 PRZ SPRAY ISOLATION RB 853 C 1 RC VA 0004 PRZ PORV BLOCK VALVE RB 853 B,C 1 RC VA 0005 PRZ STEAM SAMPLE ISOLATION RB 808 B 1 RC VA 0006 PRZ WATER SAMPLE ISOLATION RB 808 B 1 RC VA 0007 PRZ WATER SAMPLE ISOLATION AB 809 B 1 RC VA 0066 PRZ PORV RB 853 B,C 1 RC VA 0067 PRZ CODE SAFETY RB 853 B,C 1 RC VA 0068 PRZ CODE SAFETY RB 853 B,C 1 RC VA 0159 RV VENT ISOLATION RB 844 A,B,C 1 RC VA 0160 RV VENT ISOLATION RB 844 A,B,C 1 RC VA 0162 POST ACC SAMPLE PATH ISOL RB 777 A,B 1 RC VA 0163 POST ACC SAMPLE PATH ISOL RB 777 A 1 RC VA 0164 POST ACC SAMPLE PATH ISOL AB 758 A 1 RC VA 0165 POST ACC SAMPLE PATH ISOL AB 758 A 1 RC VA 0179 POST ACC SAMPLE THROTTLE AB 758 A 1 SC HX OOOA GENERATOR WATER COOLER 1A TB 775 D 1 SC HX 000B GENERATOR WATER COOLER 1B TB 775 D 1 SF TK 0002 INCORE INST HANDLING TANK RB 797 A,C,D 1 SF VA 0082 SPENT FUEL POOL TO RC MAKEUP PUMP BLOCK RB 777 B 1 SF VA 0097 SPENT FUEL POOL TO RC MAKEUP SUPPLY ISOLATION VALVE RB 777 B 1 SSF TN TBlXSFG01 1XSFG01 ENCLOSURE SSF 777 A, B,C, D,E 1 SSW FT 1011 ESV PUMP 1A SEAL WATER FLOW TRANSMITTER ESV 797 D 1 SSW FT 1012 ESV PUMP 1B SEAL WATER FLOW TRANSMITTER ESV 797 D 1 SSW FT 1013 ESV PUMP 1C SEAL WATER FLOW TRANSMITTER ESV 797 D 1 SSW VA 0109 CCWP Seal Water Reg. Valve INT 796 D 1 SSW VA 0119 CCWP Seal Water Reg. Valve INT 796 D 1 SSW VA 0129 CCWP Seal Water Reg. Valve INT 796 D 1 SSW VA 0139 CCWP Seal Water Reg. Valve INT 796 D 1 SSW VA 0155 ESV PUMP SEAL SUPPLY VALVE ESV 797 D 1 SSW VA 0156 ESV PUMP SEAL SUPPLY VALVE ESV 797 D 1 SSW VA 0157 ESV PUMP SEAL SUPPLY VALVE ESV 797 D 1 SYD BK PCB17 230KV AC POWER CIRCUIT BREAKER 17 (PCB-17) SYD 770 A, B, C, D, E 1 SYD BK PCB18 230KV AC POWER CIRCUIT BREAKER 18 (PCB-18) SYD 770 A, B, C, D, E 1 SYD BK PCB21 230KV AC POWER CIRCUIT BREAKER 21 (PCB-21) SYD 770 A, B, C, D, E 1 TO PU 0022 EFWPT AUX OIL PUMP TB 775 C 1 TO TK 0002 EFW PUMP TURBINE OIL TANK TB 775 C 1 TO TN TBEHIA FWPT 1A MAIN OIL TANK TERM BOX EH TB 775 D 1 TO TN TBEH1B FWPT 1B MAIN OILTANK TERM BOX EH TB 775 D 1 TO VA 0059 EFW PUMP TURBINE OIL PR VALVE TB 775 C 1 TO VA 0145 1MS-95 LUBE OIL SUPPLY SOLENOID TB 775 C 1 V AE 0001 EM STEAM AIR EJECTOR (SAE) TB 775 D 1 VS AH 0011 AHU-11 CONTROL ROOM A/C AB 838 A Page 18 of 23

Attachment 1 Oconee Unit 1, SW tL-, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 VS AH 0012 AHU-12 CONTROL ROOM A/C AB 838 A 1 VS AH 0026 OUTSIDE AIR BOOSTER FAN 'A' (F-22) AB 838 A 1 VS AH 0027 OUTSIDE AIR BOOSTER FAN 'B' (F-23) AB 838 A 1 VS AH O047EX1A BIT & B2T ENCLOSURE VENT FAN A BH1 796 A, B, C, D, E 1 VS AH 0047EXIB BIT & B2T ENCLOSURE VENT FAN B BH1 796 A, B, C, D, E 1 VS AH O047EXA CT4 ENCLOSURE VENT FAN A TB 796 A, B, C, D, E 1 VS AH 0047EXB CT4 ENCLOSURE VENT FAN B TB 796 A, B, C, D, E KO ELK BD CB05 CONTROL BOARD 05 KEO 688 A, B, C, D, E KO ELK BD CB06 CONTROL BOARD 06 KEO 688 A, B, C, D, E KG ELK BS OHXPHASE KHU OVERHEAD BUS X PHASE TO 230 KV SWITCHYARD KEO 702 A, B, C, D, E KG ELK BS OHYPHASE KHU OVERHEAD BUS Y PHASE TO 230 KV SWITCHYARD KEO 702 A, B, C, D, E KO ELK BS OHZPHASE KHU OVERHEAD BUS Z PHASE TO 230 KV SWITCHYARD KEO 702 A, B, C, D, E KO ELK PL EB5 ELEC BOARD 05 KEO 688 A, B, C, D, E KO ELK PL EB6 ELEC BOARD 06 KEO 688 A, B, C, D, E KG ELK SX CX KEOWEE XFMR CX DISC SW KEO 702 A, B, C, D, E KO ELK TF 0001 MAIN TRANSFORMER KEO 702 A, B, C, D, E KG ELK TF CX TRANSFORMER CX KEO 702 A, B, C, D, E KI AG TK 0001 AIR RECEIVER TANK KEO 683 A, B, C, D, E K1 CO PS 063F GEN 1 C02 RELEASE PRESS SWITCH (63F/PS2_1) KEO 683 A, B, C, D, E K1 CO SV 20F1 GEN 1 C02 RELEASE VALVE KEO 683 A, B, C, D, E K1 CO SV 20F2 GEN 1 C02 RELEASE VALVE KEO 683 A, B, C, D, E KI CO SV 20P1 GEN 1 C02 CYL RELEASE VALVE (MAIN BANK) KEO 702 A, B, C, D, E K1 CO SV 20P2 GEN 1 C02 CYL RELEASE VALVE (MAIN BANK) KEO 702 A, B, C, D, E K1 ELK BA KB1 BATT BANK 1 KEO 675 A, B, C, D, E K1 ELK BC KC1 BATT CHARGER 1 (KC-1) KEO 675 A, B, C, D, E K1 ELK BD CB01 CONTROL BOARD 01 KEO 688 A, B, C, D, E K1 ELK BD CB02 CONTROL BOARD 02 KEO 688 A, B, C, D, E K1 ELK BD CB03 CONTROL BOARD 03 KEO 688 A, B, C, D, E KI ELK BD CB04 CONTROL BOARD 04 KEO 688 A, B, C, D, E K1 ELK BS GENACB13 13.8 KV BUS FROM GEN #1 TO ACBI AND ACB3 KEO 702 A, B, C, D, E KI ELK BS MTFACB1 13.8 KV BUS FROM ACB1 TO MAIN XFMR KEO 702 A, B, C, D, E K1 ELK CA 0103 TERMINAL BOX 103 (WIRING ONLY) KEO 675 A, B, C, D, E K1 ELK CA 0127 TERMINAL BOX 127 KEO 683 A, B, C, D, E K1 ELK CA ILC1 LOGIC CABINET 1 KEO 688 A, B, C, D, E K1 ELK CA 1LC2 LOGIC CABINET 2 KEO 688 A, B, C, D, E Ki ELK CA ILC3 LOGIC CABINET 3 KEO 688 A, B, C, D, E K1 ELK CA 1MTC1 Ul MISC TERM CAB 1MTC1 KEO 675 A, B, C, D, E K1 ELK CA 1MTC2 Ul MISC TERM CAB 1MTC2 KEO 675 A, B, C, D, E K1 ELK MX IXA 600V AC MCC lXA KEO 683 A, B, C, D, E K1 ELK PL IDA 125V DC DIST CENTER iDA KEO 675 A, B, C, D, E K1 ELK PL 1ECI EXC CUBICLE 1 KEO 702 A, B, C, D, E K1 ELK PL 1EC2 EXC CUBICLE 2 KEO 702 A, B, C, D, E Ki ELK PL 1EC3 EXC CUBICLE 3 KEO 702 A, B, C, D, E K1 ELK PL 1EC4 EXC CUBICLE 4 KEO 702 A, B, C, D, E Page 19 of 23

Attachment 1 Oconee Un'rw SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function KI ELK PL 1EC5 EXC CUBICLE 5 KEO 702 A, B, C, D, E K1 ELK PL 1TGP1 TURBINE GAUGE PANEL (UNIT 1) KEO 683 A, B, C, D, E K1 ELK PL EB1 ELEC BOARD 01 KEO 688 A, B, C, D, E K1 ELK PL EB2 ELEC BOARD 02 KEO 688 A, B, C, D, E K1 ELK PL EB3 ELEC BOARD 03 KEO 688 A, B, C, D, E K1 ELK PL EB4 ELEC BOARD 04 KEO 688 A, B, C, D, E Ki ELK PL EFBP1 EMERGENCY FEEDER BREAKER NO. 1 KEO 702 A, B, C, D, E K1 ELK PL GBP GENERATOR BREAKER PANEL KEO 702 A, B, C, D, E K1 ELK PL KA 120V AC PPB KA KEO 683 A, B, C, D, E K1 ELK PL MODP MOTOR OPERATED DISCONNECT PANEL KEO 702 A, B, C, D, E K1 ELK SH lx 600V AC SWGR lX KEO 702 A, B, C, D, E KI ELK SX 1E Ul XFMR 1E DISC SW KEO 702 A, B, C, D, E K1 ELK SX lx TRANSFORMER 1X DISCONNECT SWITCH KEO 702 A, B, C, D, E K1 ELK TF 1E EXCITATION TRANSFORMER 1E KEO 702 A, B, C, D, E K1 ELK TF lx 600V AC SWGR 1X TRANSFORMER KEO 702 A, B, C, D, E Ki ELK TN 0101 TERMINAL BOX 101 KEO 683 A, B, C, D, E KI ELK TN 0102 TERMINAL BOX 102 KEO 683 A, B, C, D, E K1 ELK TN 0109 TERMINAL BOX 109 KEO 683 A, B, C, D, E KI ELK TN 0113 TERMINAL BOX 113 (WIRING ONLY) KEO 683 A, B, C, D, E KI ELK TN 0121 TERMINAL BOX 121 (WIRING ONLY) KEO 683 A, B, C, D, E K1 ELK TN 0123 TERMINAL BOX 123 (WIRING ONLY) KEO 683 A, B, C, D, E K1 GA HX 0001 GEN AIR COOLER 1 KEO 695 A, B, C, D, E K1 GA HX 0002 GEN AIR COOLER 2 KEO 695 A, B, C, D, E K1 GA HX 0003 GEN AIR COOLER 3 KEO 695 A, B, C, D, E KI GA HX 0004 GEN AIR COOLER 4 KEO 695 A, B, C, D, E K1 GA HX 0005 GEN AIR COOLER 5 KEO 695 A, B, C, D, E KI GA HX 0006 GEN AIR COOLER 6 KEO 695 A, B, C, D, E K1 GBO HX 0001 TURB GUIDE BRNG OIL COOLER KEO 667 A, B, C, D, E K1 GBO LS 63TA TURB GUIDE BRNG OIL LEVEL SWITCH (1GBOLT0001) KEO 675 A, B, C, D0,E K1 GBO LS 63TB TURB GUIDE BRNG OIL LEVEL SWITCH (1GBOLT0002) KEO 675 A, B, C, D, E K1 GBO PU 088A AC BRNG OIL PUMP (88A) KEO 667 A, B, C, D, E K1 GBO PU 088D DC BRNG OIL PUMP (88D) KEO 667 A, B, C, D, E K1 GCS CA SS1A GOVERNOR SPEED CONTOL CABINET SSIA KEO 667 A, B, C, D, E KI GCS CA SSIB GOVERNOR SPEED CONTOL CABINET SSIB KEO 667 A, B, C, D, E K1 GEN GN 0001 KEOWEE UNIT 1 GENERATOR KEO 683 A, B, C, D, E K1 GEN PC GPC1 GEN POT CUBICLE UNIT 1 (1 PER PHASE) KEO 702 A, B, C, D, E K1 GEN PL BPC1 BUS POT CUBICLE UNIT 1 (1 PER PHASE) KEO 702 A, B, C, D, E K1 GEN PL NEUCUB NEUTRAL CUBICLE 1 KEO 683 A, B, C, D, E KI HPO HX 0001 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0002 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0003 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0004 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0005 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E KI HPO HX 0006 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E Page 20 of 23

Attachment 1 OWe-Unit 1, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function K1 HPO HX 0007 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0008 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO LS 63BLH LEVEL SWITCH (1HPOLS0001) KEO 683 A, B, C, D, E K1 HPO LS 63BLL LEVEL SWITCH (1HPOLS0002) KEO 683 A, B, C, D, E K1 HPO PU 88HA AC GEN HP LIFT PUMP (88HA) KEO 675 A, B, C, D, E K1 HPO PU 88HD DC GEN HP LIFT PUMP (88HD) KEO 675 A, B, C, D, E KI MT PS 0009 TURBINE PIT PRESS SWITCH KEO 675 A, B, C, D, E K1 MT TR 0001 KEOWEE UNIT 1 TURBINE KEO 702 A, B, C, D, E K1 OG TK 0001 GOVERNOR ACTUATOR KEO 683 A, B, C, D, E K1 OG TK 0002 GOVERNOR OIL SUMP TANK KEO 683 A, B, C, D, E K1 OG TK 0003 GOVERNOR OIL PRESS TANK KEO 683 A, B, C, D, E K1 PM DT MPU1A SPEED CONTROL MAGNETIC PICKUP 1A KEO 667 A, B, C, D, E K1 PM DT MPU1B SPEED CONTROL MAGNETIC PICKUP 1B KEO 667 A, B, C, D, E K1 PM DT MPU1C SPEED CONTROL MAGNETIC PICKUP 1C KEO 667 A, B, C, D, E KI TS LS 63SA TURB SUMP LEVEL SWITCH (1TSLSO001) KEO 675 A, B, C, D, E K1 TS LS 63SB TURB SUMP LEVEL SWITCH (1TSLS0002) KEO 675 A, B, C, D, E K1 TS PU 88SA AC SUMP PUMP (88SA) KEO 675 A, B, C, D, E K1 TS PU 88SD DC SUMP PUMP (88SD) KEO 675 A, B, C, D, E Ki WL VA 0011 GEN COOL ISOL VALVE (1WL-11) KEO 683 A, B, C, D, E K2 AG TK 0001 AIR RECEIVER TANK KEO 683 A, B, C, D, E K2 CO PS 063F GEN 2 C02 RELEASE PRESS SWITCH (63F/PS2_2) KEO 683 A, B, C, D, E K2 CO SV 20F3 GEN 2 C02 RELEASE VALVE KEO 683 A, B, C, D, E K2 CO SV 20F4 GEN 2 C02 RELEASE VALVE KEO 683 A, B, C, D, E K2 CO SV 20P3 GEN 2 C02 CYL RELEASE VALVE (RESERVE BANK) KEO 702 A, B, C, D, E K2 CO Sv 20P4 GEN 2 C02 CYL RELEASE VALVE (RESERVE BANK) KEO 702 A, B, C, D, E K2 ELK BA KB2 BATT BANK 2 KEO 675 A, B, C, D, E K2 ELK BC KC2 BAiT CHARGER 2 (KC-2) KEO 675 A, B, C, D, E K2 ELK BD CB07 CONTROL BOARD 07 KEO 688 A, B, C, D, E K2 ELK BD CB08 CONTROL BOARD 08 KEO 688 A, B, C, D, E K2 ELK BD CB09 CONTROL BOARD 09 KEO 688 A, B, C, D, E K2 ELK BD CB1O CONTROL BOARD 10 KEO 688 A, B, C, D, E K2 ELK BS GENACB24 13.8 KV BUS FROM GEN #2 TO ACB2 AND ACB4 KEO 702 A, B, C, D, E K2 ELK BS MTFACB2 13.8 KV BUS FROM ACB2 TO MAIN XFMR KEO 702 A, B, C, D, E K2 ELK CA 2LC1 LOGIC CABINET 1 KEO 688 A, B, C, D, E K2 ELK CA 2LC2 LOGIC CABINET 2 KEO 688 A, B, C, D, E K2 ELK CA 2LC3 LOGIC CABINET 3 KEO 688 A, B, C, D, E K2 ELK CA 2MTC1 U2 MISC TERM CAB 2MTC1 KEO 675 A, B, C, D, E K2 ELK CA 2MTC2 U2 MISC TERM CAB 2MTC2 KEO 675 A, B, C, D, E K2 ELK MX 2XA 600V AC MCC 2XA KEO 683 A, B, C, D, E K2 ELK PL 2DA 125V DC DIST CENTER 2DA KEO 675 A, B, C, D, E K2 ELK PL 2EC1 EXC CUBICLE 1 KEO 702 A, B, C, D, E K2 ELK PL 2EC2 EXC CUBICLE 2 KEO 702 A, B, C, D, E K2 ELK PL 2EC3 EXC CUBICLE 3 KEO 702 A, B, C, D, E K2 ELK PL 2EC4 EXC CUBICLE 4 KEO 702 A, B, C, D, E Page 21 of 23

Attachment 1 S-Oconee Unit 1, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function K2 ELK PL 2EC5 EXC CUBICLE 5 KEO 702 A, B, C, D, E K2 ELK PL 2TGP1 TURBINE GAUGE PANEL (UNIT 2) KEO 683 A, B, C, D, E K2 ELK PL EB10 ELEC BOARD 10 KEO 688 A, B, C, D, E K2 ELK PL EB7 ELEC BOARD 07 KEO 688 A, B, C, D, E K2 ELK PL EBB ELEC BOARD 08 KEO 688 A, B, C, D, E K2 ELK PL EB9 ELEC BOARD 09 KEO 688 A, B, C, D, E K2 ELK PL EFBP2 EMERGENCY FEEDER BREAKER NO. 2 KEO 702 A, B, C, D, E K2 ELK PL GBP GENERATOR BREAKER PANEL KEO 702 A, B, C, D, E K2 ELK PL KB 120V AC PPB KB KEO 683 A, B, C, D, E K2 ELK PL MODP MOTOR OPERATED DISCONNECT PANEL KEO 702 A, B, C, D, E K2 ELK SH 2X 600V AC SWGR 2X KEO 702 A, B, C, D, E K2 ELK SX 2E U2 XFMR 2E DISC SW KEO 702 A, B, C, D, E K2 ELK SX 2X TRANSFORMER 2X DISCONNECT SWITCH KEO 702 A, B, C, D, E K2 ELK TF 2E EXCTIATION TRANSFORMER 2E KEO 702 A, B, C, D, E K2 ELK TF 2X 13.8KV/600V AC SWGR 2X TRANSFORMER KEO 702 A, B, C, D, E K2 ELK TN 0201 TERM BOX TB-201 KEO 683 A, B, C, D, E K2 ELK TN 0202 TERM BOX TB-202 KEO 683 A, B, C, D, E K2 ELK TN 0203 TERM BOX TB-203 KEO 675 A, B, C, D, E K2 ELK TN 0227 TERM BOX TB-227 KEO 683 A, B, C, D, E K2 GA HX 0001 GEN AIR COOLER 1 KEO 667 A, B, C, D, E K2 GA HX 0002 GEN AIR COOLER 2 KEO 667 A, B, C, D, E K2 GA HX 0003 GEN AIR COOLER 3 KEO 667 A, B, C, D, E K2 GA HX 0004 GEN AIR COOLER 4 KEO 667 A, B, C, D, E K2 GA HX 0005 GEN AIR COOLER 5 KEO 667 A, B, C, D, E K2 GA HX 0006 GEN AIR COOLER 6 KEO 667 A, B, C, D, E K2 GBO HX 0001 TURB GUIDE BRNG OIL COOLER KEO 667 A, B, C, D, E K2 GBO LS 63TA TURB GUIDE BRNG OIL LEVEL SWITCH (2GBOLT0001) KEO 675 A, B, C, D, E K2 GBO LS 63TB TURB GUIDE BRNG OIL LEVEL SWITCH (2GBOLT0002) KEO 675 A, B, C, D, E K2 GBO PU 088A AC BRNG OIL PUMP (88A) KEO 667 A, B, C, D, E K2 GBO PU 088D DC BRNG OIL PUMP (88D) KEO 667 A, B, C, D, E K2 GCS CA SS2A GOVERNOR SPEED CONTOL CABINET SS2A KEO 667 A, B, C, D, E K2 GCS CA SS2B GOVERNOR SPEED CONTOL CABINET SS2B KEO 667 A, B, C, D, E K2 GEN GN 0001 KEOWEE UNIT 2 GENERATOR KEO 683 A, B, C, D, E K2 GEN PC GPC2 GEN POT CUBICLE UNIT 2 (1 PER PHASE) KEO 702 A, B, C, D, E K2 GEN PL BPC2 BUS POT CUBICLE UNIT 2 (1 PER PHASE) KEO 702 A, B, C, D, E K2 GEN PL NEUCUB NEUTRAL CUBICLE 2 KEO 683 A, B, C, D, E K2 HPO HX 0001 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0002 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0003 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0004 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0005 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0006 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0007 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0008 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E Page 22 of 23

Attachment 1 Oconee Unit 1, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function K2 HPO LS 63BLH LEVEL SWITCH (2HPOLS0001) KEO 683 A, B, C, D, E K2 HPO LS 63BLL LEVEL SWITCH (2HPOLSO002) KEO 683 A, B, C, D, E K2 HPO PU 88HA AC GEN HP LIFT PUMP (88HA) KEO 675 A, B, C, D, E K2 HPO PU 88HD DC GEN HP LIFT PUMP (88HD) KEO 675 A, B, C, D, E K2 MT PS 0009 TURB PIT PRESS SWITCH KEO 675 A, B, C, D, E K2 MT TR 0001 KEOWEE UNIT 2 TURBINE KEO 683 A, B, C, D, E K2 OG TK 0001 GOVERNOR ACTUATOR KEO 683 A, B, C, D, E K2 OG TK 0002 GOVERNOR OIL SUMP TANK KEO 683 A, B, C, D, E K2 OG TK 0003 GOVERNOR OIL PRESS TANK KEO 683 A, B, C, D, E K2 PM DT MPU1A SPEED CONTROL MAGNETIC PICKUP 1A KEO 667 A, B, C, D, E K2 PM DT MPUIB SPEED CONTROL MAGNETIC PICKUP 1B KEO 667 A, B, C, D, E K2 PM DT MPUIC SPEED CONTROL MAGNETIC PICKUP 1C KEO 667 A, B, C, D, E K2 TS LS 63SA TURB SUMP LEVEL SWITCH (2TSLSO001) KEO 675 A, B, C, D, E K2 TS LS 63SB TURB SUMP LEVEL SWITCH (2TSLS0002) KEO 675 A, B, C, D, E K2 TS PU 88SA AC SUMP PUMP (88SA) KEO 675 A, B, C, D, E K2 TS PU 88SD DC SUMP PUMP (88SD) KEO 675 A, B, C, D, E K2 WL VA 0011 GEN COOL ISOL VALVE (2WL-11) KEO 683 A, B, C, D, E Page 23 of 23

Attachment 2

'Oconee Unit 1, SWEL-1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 0 DA TK " OOC DIESEL STARTING AIR TANK C SSF 777 B,C 0 EL CA SYTC1 SWYD TERMINAL CABINET 01 SYD 770 A, B, C, D, E 0 EL SH B1T05 SK1 CT4 TO STDBY BUS 1 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL TF 0CT4 XFMR CT-4 BH3 796 A, B, C, D, E 0 FO TK 0003 SSF DIESEL OIL DAY TANK SSF 777 B,C 0 SSF BA DCSF DCSF SSF NORMAL BATTERY SSF 777 A, B, C, D, E 0 SSF MX XSF MCC XSF(600V) SSF 777 A, B, C, D, E 0 SSF SH OTS1 OTS1 SSF ESSENTIAL SWGR 4160V SSF 777 A, B, C, D, E 0 SYD BC SY2 230KV SWYD BATTERY CHARGER SY2 SYD 770 A, B, C, D, E 0 SYD BD RB02 SWITCHYARD RELAY BOARD RB02 SYD 770 A, B, C, D, E 0 SYD BD RF17 SWITCHYARD RELAY BOARD RF17 SYD 770 A, B, C, D, E 0 SYD BD SRF17 SWITCHYARD RELAY BOARD SRF17 SYD 770 A, B, C, D, E 0 SYD BK PCB08 230KV AC POWER CIRCUIT BREAKER 08 (PCB-08) SYD 770 A, B, C, D, E 0 SYD PL DYC DC PANELBOARD C SYD 770 A, B, C, D, E 0 SYD PL DYE DC PANELBOARD E SYD 770 A, B, C, D, E 0 SYD PL SYDC1 SWITCHYARD DISTRIBUTION CENTER 1 SYD 770 A, B, C, D, E 0 SYD TF RBPT RED BUS POTENTIAL TRANSFORMER (EGPS) SYD 770 A, B, C, D, E 0 VS AH 0042 AHU 0-42 HEATING AND A/C SSF BUILDING SSF 817 B,C 0 VS AH 0044EX6 SSF ON LINE EXHAUST FAN & MOTOR SSF 817 B,C 0 VS DA CDO1 SSF CONSTANT VENTILATION (VS-AH-0044EX1) EXHAUST FAN DAMPER SSF 817 B,C 0 VS PS SSFPS03 SSF ON-LINE VENTILATION SYSTEM SUPPLY FAN SSF 822 A, B, C, D, E 0 VS T" SSFCT2 HVAC TEMPERATURE CONTROLLER (FOR SSF-CP-1) SSF 822 A, B, C, D, E 1 AS PT 0117P AUX STEAM PRESSURE TRANSMITTER (MS-126 & MS-129) TB 796 D 1 BAG BD 1UB1 CONTROL BOARD 1UB1 AB 822 A, B, C, D, E 1 BAG BD 1UB2 CONTROL BOARD 1UB2 AB 822 A, B, C, D, E 1 BAG BD 1VB2 CONTROL BOARD 1VB2 AB 822 A, B, C, D, E 1 C DM OOOA POLISHING DEMINERALIZER 1A TB 775 D 1 C PS 0227 CONDENSATE BOOSTER PUMP SUCTION HEADER PRESS LOW TB 775 D 1 C TK OOOA UPPER SURGE TANK 1A TB 838 D 1 C TK 000C UPPER SURGE TANK DOME TB 838 D 1 CC PU 0002 CCW PUMP 1B INT 810 D,A 1 CC PU 0024 EFWPT OIL COOLER PUMP TB 775 C 1 CRD CA CC1 DCRDCS CONTROL CABINET CC-1 AB 809 A 1 EHC CA EHC1 EHC CAB 1EHC1 AB 809 D 1 EHC CA EHTC1 EHC TERM CAB 1EHTCl AB 809 D 1 EL BA 1PB PWR BATT 1PB TB 796 A, B, C, D, E 1 EL BC 1PB PWR BATT CHGR 1PB TB 796 A, B, C, D, E 1 EL BI 1KX STATIC INVERTER 1KX (INCLUDES STATIC XFER SWITCH) AB 796 A, B, C, D, E 1 EL BK 1A 240/120V 1A REGULATOR OUTPUT BKR AB 796 A, B, C, D, E 1 EL CA 1AT3 AREA TERM CAB 1AT3 AB 809 A, B, C, D, E 1 EL CA 1EB7 ELECTRICAL BOARD 1EB7 AB 822 A, B, C, D, E 1 EL CA SGLC1 STEAM GEN LOGIC CABINET AB 809 A, B, C, D, E 1 EL DI 1ADB ISOL DIODE ASSEMBLY 1ADB AB 796 A, B, C, D, E 1 EL IR PIR UNIT 1 PNEUMATIC INSTR RACK AB 809 B Page 1 of 3

Attachment 2 Oconee Unit 1, SWEL-1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 EL LX 1X4 600V LC 1X04 TB 796 A, B,C, D,E 1 EL LX 1X9 600V LC 1X09 AB 796 A, B,C, D, E 1 EL MX IXC MCC 1XC TB 775 D 1 EL MX 1XGB MCC 1XGB TB 796 D 1 EL MX 1XI 600V MCC lXI AB 809 D 1 EL MX 1XL MCC 1XL AB 771 A,B,C 1 EL MX 1XP MCC 1XP AB 796 A, B,C, D,E 1 EL MX 1XR 600V MCC 1XR AB 838 A 1 EL MX 1XS1 MCC 1XS1 AB 796 A, B,C, D,E 1 EL MX IXSF1 MCC 1XSF-1 (208V) SSF 797 A, B, C, D, E 1 EL PL 1CPS 1 POWDEX PANEL TB 775 D 1 EL PL 1DCA 125V DC 1DCA AB 796 A, B, C, D, E 1 EL PL 1DCB 125V DC 1DCB AB 796 A, B, C, D, E EL PL 1DIC 125V PPB lDIC AB 809 A, B, C, D, E EL PL 1EPSLP1 EPSL PANEL 1EPSLP1 AB 809 A, B, C, D, E EL PL 1SGFSP BiT FAN SPEED CABINET TB 796 A, B, C, D, E EL PL 1SKN 240/120V PPB 1SKN ESV 797 A,B,C, D,E EL PL PZR1B 600V PPB 1B (FOR PRESSURIZER HEATERS GROUP 1B BANK 2) RB 817 A, B, C, E EL SH 1TC01 1TC BUS 2 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E EL TF OCT1 XFMR CT-1 YD 796 A, B, C, D, E EL TF IXA XFMR lXA TB 796 A, B, C, D, E EL TF 1XS3A XFMR 1XS3A (600V TO 208V) AB 796 A, B,C, D,E EL TF 1XSF XFMR 1XSF (600V TO 208V) SSF 817 A, B, C, D, E EL VR 000A REGULATED PWR SUPP REG 1A AB 796 A,B,C,D,E ES CA 1ESTC3 ESFAS EVEN/ODD TERM CAB 1ESTC3 AB 809 A, B,C, D,E ESV CA 1ESV1 ESV PUMP CONTROLS RELAY CABINET 1ESVl AB 796 D ESV TK 0002 ESV Receiver Tank 1B ESV 797 D FD LT 0082 SG 1A LEVEL TRANSMITTER RB 777 D FD PL 0369 REMOTE STARTER ENCLOSURE FOR 1FDW-369 AB 809 D ED PS 1011 FWP 1A CONTROL OIL PRESSURE SWITCH TB 775 D ED PU 0004 MDEFW PUMP 1A TB 775 D ED VA 0086 PRESS REG TD PUMP SEALS TB 775 D HP VA 0071 SEAL RETURN LINE RELIEF AB 771 B HPI FT 0007A HPI A TRAIN INJ FLOW TRANS AB 758 A,B,C HPI PS 0357 LETDOWN FLOW TEMP HIGH INTERLOCK AB 783 B HPI PU 0005 SSF RC MAKEUP PUMP RB 777 B HPI SV 0090 CONTROLS LETDOWN ISOLATION VALVE FOR 1HP-5 AB 809 B ICC CA 0001A UNIT 1 ICCM TRAIN A CABINET AB 822 A, B,C, D,E ICS PL ASP AUX SHUTDOWN PANEL TB 822 A, B,C, D,E LP VA 0006 LPI SUCTION CROSSOVER AB 758 D LPI FT 0004P LPI TRAIN 1B INJ FLOW TRANS (Powered by ICCM) AB 809 D LPI HX OOOA LPI COOLER 1A AB 771 D LPI TE 0210 LPI COOLER 1A OUTLET TEMP (ICS Input) AB 771 D LPS FT 0124 LPI COOLER 1A FLOW XMTR (1LPSW-251) AB 771 D Page 2 of 3

Attachment 2 Oconee Unit 1, SWEL-1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 1 LPS SV 1001 SOLENOID VALVE FOR 1LPSW-252 AB 783 D 1 MS PS 0086 MAIN STEAM PRESS SWITCH (1MS-19) TB 796 D 1 MS VA 0006 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0010 MAIN STEAM SAFETY RELIEF AB 809 D 1 MS VA 0080 MS TO 2ND STAGE RHTR ISOL TB 796 D 1 MS VA 0129 MS TO AS CONTROL VALVE TB 796 D 1, N TK 0003 NITROGEN SUPPLY FOR 1FDW-315 & 1FDW-316 AB 838 D 1 PPS CA 0005 RPS C/ES C1 AB 822 A, B,C, D,E 1 PPS CA 0009 ES A2 AB 822 A,B,C,D,E 1 PPS CA 0011 ES C2 AB 822 A, B, C, D, E 1 PPS CA 0018 ES STATUS EVEN AB 822 A, B, C, D, E 1 RBC AH 0020A RBCU FAN 1A RB 825 E 1 RBC HX 0OODAUX AUX RBCU D RB 844 E 1 RC LT 0004P1 PRZ LEVEL TRANSMITTER RB 797 B,C 1 RC PT 0166P RCS LOOP B PRESS TRANS RB 825 C 1 RC PT 0226 Ul RC LOOP B PRESSURE RB 819 C,D 1 RC RD 0006A Al COLD LEG RTD RB 797 C,D 1 RC SV 0231 CONTROLS POST ACC. SAM. VLV(1RC-179) AB 758 A 1 RC VA 0066 PRZ PORV RB 853 B,C 1 RC VA 0159 RV VENT ISOLATION RB 844 A,B,C 1 RC VA 0179 POST ACC SAMPLE THROTTLE AB 758 A 1 SSF TN TBlXSFG01 1XSFG01 ENCLOSURE SSF 777 A, B, C, D, E 1 SSW FT 1013 ESV PUMP IC SEAL WATER FLOW TRANSMITTER ESV 797 D 1 TO TK 0002 EFW PUMP TURBINE OIL TANK TB 775 C 1 TO TN TBEHIB FWPT 1B MAIN OILTANK TERM BOX EH TB 775 D 1 VS AH 0011 AHU-11 CONTROL ROOM A/C AB 838 A KO ELK TF 0001 MAIN TRANSFORMER KEO 702 A, B, C, D, E K1 CO SV 20P2 GEN 1 C02 CYL RELEASE VALVE (MAIN BANK) KEO 702 A, B, C, D, E KI ELK BA KB1 BATT BANK 1 KEO 675 A, B, C, D, E K1 ELK BD CB01 CONTROL BOARD 01 KEO 688 A, B, C, D, E KI ELK CA 1MTC1 Ul MISC TERM CAB 1MTC1 KEO 675 A, B, C, D, E K1 ELK MX IXA 600V AC MCC 1XA KEO 683 A, B, C, D, E K1 ELK TN 0109 TERMINAL BOX 109 KEO 683 A, B, C, D, E KI OG TK 0003 GOVERNOR OIL PRESS TANK KEO 683 A, B, C, D, E K1 PM DT MPUIA SPEED CONTROL MAGNETIC PICKUP 1A KEO 667 A, B, C, D, E KI WL VA 0011 GEN COOL ISOL VALVE (1WL-11) KEO 683 A, B, C, D, E K2 ELK BC KC2 BATT CHARGER 2 (KC-2) KEO 675 A, B, C, D, E K2 ELK CA 2MTC1 U2 MISC TERM CAB 2MTC1 KEO 675 A, B, C, D, E K2 ELK PL 2DA 125V DC DIST CENTER 2DA KEO 675 A, B, C, D, E K2 ELK TN 0203 TERM BOX TB-203 KEO 675 A, B, C, D, E K2 GA HX 0003 GEN AIR COOLER 3 KEO 667 A, B, C, D, E K2 HPO PU 88HA AC GEN HP LIFT PUMP (88HA) KEO 675 A, B, C, D, E K2 TS LS 63SB TURB SUMP LEVEL SWITCH (2TSLS0002) KEO 675 A, B, C, D,E Page 3 of 3

Attachment 3 Oconee Unit 1, SWEL-2, Base-2 and Rapid Drawdown List Safety EO. ID Description Svs EQ. Class BLDG Col # Elev Room # Function 05/Horizonal Aux. SF Pool OSFPU0001 A SF Pump SF Pump Building T-73 783' 9" 218 Cooling 05/Horizonal Aux. SF Pool OSFPU0002 B SF Pump SF Pump Building T-73 783' 9" 218 Cooling BWST Recirculation 06/Vertical Aux. SF Pool OSFPU0004 Pump SF Pump Building T-74 783' 9" 218 Cooling 05/Horizonal Aux. SF Pool OSFPU0006 C SF Pump SF Pump Building T-73 783' 9" 218 Cooling 21/Heat Aux. SF Pool OSFHXOOOA A SF Cooler SF Exchanger Building T-74 783' 9" 218 Cooling 21/Heat Aux. SF Pool OSFHXOOOB B SF Cooler SF Exchanger Building T-74 783' 9" 218 Cooling 21/Heat Aux. SF Pool OSFHXOOOC C SF Cooler SF Exchanger Building T-73 783' 9" 218 Cooling 21/Tanks Heat Aux SF Pool OSFFLOOOA A SF Filter SF Exchanger Building 783' 219 Cooling 21/Tanks Heat Aux SF Pool OSFFLOOOB B SF Filter SF Exchanger Building 783' 219 Cooling 21/Tanks Heat Aux SF Pool OSFDMOO01 SF Demin SF Exchanger Building 783' 219 Cooling Page 1 of 1

Attachment 4 Oconee Unit 1, SWEL-2 List Safety EQ. ID Descridtion Svs EQ. Class BLDG Col # Elev Room # Function 05/Horizonal Aux. SF Pool OSFPU0001 A SF Pump SF Pump Building T-73 783' 9" 218 Cooling 05/Horizonal Aux. SF Pool OSFPU0002 B SF Pump SF Pump Building T-73 783' 9" 218 Cooling 05/Horizonal Aux. SF Pool OSFPU0006 C SF Pump SF Pump Building T-73 783' 9" 218 Cooling 21/Heat Aux. SF Pool OSFHXOOOA A SF Cooler SF Exchanger Building T-74 783' 9" 218 Cooling 21/Heat Aux. SF Pool OSFHXOOOB B SF Cooler SF Exchanger Building T-74 783' 9" 218 Cooling 21/Heat Aux. SF Pool 0SFHX000C C SF Cooler SF Exchanger Building T-73 783' 9" 218 Cooling Page 1 of 1

Oconee's Seismic Walkdown Information Requested by NRC's March 12, 2012, 10CFR 50.54(f) Letter November 27, 2012 Enclosure 2 Unit 2 Seismic Walkdown Report (NRC 50.54 (f) NTTF Recommendation 2.3)

Attachment 5 Contains Security-Sensitive Information -Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 Executive Summary Electric Power Research Institute (EPRI) Report 1025286, Seismic Walkdown Guidance for Resolution of Fukushima Near-Term Task Force Recommendation 2.3: Seismic was issued in June 2012. This Document provides guidance and procedures to perform seismic walkdowns as required by the U.S. Nuclear Regulatory Commission's (NRC's) 50.54(f) letter regarding Near-Term Task Force (NTTF) Recommendation 2.3: Seismic. The EPRI guidance covers selection of personnel; selection of a sample of structures, systems, and components (SSCs) that represent diversity of component types and assures inclusion of components from critical systems / functions; conduct of the walkdowns; evaluation of potentially adverse conditions against the plant seismic licensing basis; and reporting requirements. It also includes check lists to be used by the Seismic Walkdown Engineers (SWEs) in performing the seismic walkdowns and walk-bys. Duke Energy committed to implement resolution of Near-Term Task Force (NTTF) Recommendation 2.3: Seismic using EPRI Report 1025286 in a letter to the NRC dated 7/9/2012.

1. Seismic Licensing Basis The seismic design basis for SSCs at Oconee nuclear station are defined in Section 3.7 of the UFSAR. Due to the vintage of Oconee nuclear station, some seismic terminology is not consistent with current terminology. The Operating Basis earthquake (OBE) is also referred to as the Design Basis earthquake (DBE) and the Safe Shutdown earthquake (SSE) is also referred to as the Maximum Hypothetical Earthquake (MHE).

1.1. Response Spectra The seismic spectrum response curves for Oconee were generated by the time history technique of seismic analysis. The sample earthquake utilized is that recorded at El Centro, California, N-S, May18, 1940. The Peak Ground Acceleration (PGA) for the Design Basis earthquake (DBE) is 0.05g. The PGA for the Maximum Hypothetical earthquake (MHE) for Class 1 Structures founded on rock is 0.1g. The PGA for the Maximum Hypothetical Earthquake (MHE) for Class 1 Structures founded on overburden is 0.15g.

1.2. Seismic Qualification 1.2.1. Seismic Qualification of Safety-Related Mechanical Equipment When the response spectra at each elevation in the building have been determined, the G-loadings imposed on a component may then be determined. These loads are evaluated by the equipment supplier and in the case of complex components such as heat exchangers, the design calculations performed by the supplier are reviewed by B&W Engineering or Duke Energy, as applicable. The supplier has the freedom to use either of two alternate analytical methods to evaluate the equipment or he may choose to test it. Components maybe tested by either shaker or impact tests or a certification of the test results are required. In a few cases, a manufacturer's certification that the equipment would withstand seismic conditions is acceptable based on tests of similar equipment, an example of this would be similar type pumps. Analytically the evaluation can be made by calculating the natural frequency of the component, entering the appropriate damping curve and determining the amplification factor from the response spectrum curve. The equipment is then evaluated using these G-loadings. As an alternative, the component may be evaluated without calculating the natural frequency by using the peak amplification factor from the appropriate damping curve to determine the equipment loads. This latter approach is conservative. Special attention is given to Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 foundation and nozzle loadings for equipment such as tanks, pumps, heatexchangers, demineralizers and filters. Loads imposed by connecting piping on a given component are included and in some cases, component nozzles have had to be reinforced to accommodate these loads. Components which are most likely to require special reinforcement due to seismic loads, are long, horizontal, saddle mounted tanks, vertical tanks mounted on legs, and stacked heat exchangers. These have all been evaluated and appropriately designed for the seismic conditions. An alternate method of seismic qualification for mechanical equipment (within the applicable equipment classes) would be an experience based approach. Seismic adequacy can be established using methods described in the Generic Implementation Procedure (GIP) for Seismic Verification of Nuclear Plant Equipment, Revision 3A, developed by the Seismic Qualification Utility Group (SQUG). This method is also commonly known as SQUG.

1.2.2. Seismic Qualification of Safety-Related Electrical Equipment The seismic design basis for instrumentation and electrical equipment is that the electrical devices considered essential in performing Reactor Protection and Engineered Safeguards functions and in providing emergency power shall be designed to assure that they will not lose their capability to perform intended safety functions during and following the Safe Shutdown Earthquake (SSE). This basic criteria has remained unchanged since the issuance of the operating license; however, the seismic qualification techniques and documentation requirements for various plant modifications have in many instances followed the advances in the state of the art.

The seismic adequacy of all electrical cable tray supports is established by the methods and criteria established for cable tray supports in the Generic Implementation Procedure (GIP-3A) for Seismic Verification of Nuclear Plant Equipment, Rev 3A, developed by the Seismic Qualification Utility Group (SQUG).

In order to meet the seismic design objectives defined in UFSAR Section 3.10.1, the following seismic evaluation methods were employed consistent with the applicable licensing commitment.

Testing Devices may be qualified by either shaker or impact tests. A certification of the test results or copies of the test results are required. Additionally, a manufacturer's certification that a certain type of equipment would withstand the seismic conditions is acceptable based on previous testing/experience with similar equipment.

Analysis Devices may also be qualified by analytical methods. For example, one evaluation method involves calculating/determining the natural frequency of the device, entering the appropriate response spectra damping curves, and determining the corresponding amplification factor. The device is then evaluated using this "G"loading value.

Alternatively, the devices may be evaluated without calculating/determining its natural frequency by using the peak amplification factor from the appropriate response spectra damping curve to determine the "G" loading.

An alternate method of seismic qualification for electrical equipment (within the applicable equipment classes) would be an experience based approach. Seismic adequacy can be established using methods described in the Generic Implementation Procedure (GIP) for Seismic Verification of Nuclear Plant Equipment, Revision 3A, Attachment 5 Contains Security-Sensitive Information -Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 3 of 13

Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 developed by the Seismic Qualification Utility Group (SQUG).-This method is also commonly known as SQUG.

1.3. Response to generic letter 87-02 Generic Letter 87-02, "Verification of Seismic Adequacy of Mechanical and Electrical Equipment in Operating Reactors, Unresolved Safety Issue (USI) A-46," was issued because the NRC concluded that the seismic adequacy of certain equipment in operating plants must be reviewed against seismic criteria developed during the resolution of Unresolved Safety Issue (USI) A-46.

The NRC determined that it is not feasible to require older operating plants to meet new licensing requirements that were not in use when plants were licensed. Therefore, an alternative method was selected to verify the seismic capability of equipment. This alternative method used a compilation of existing earthquake experience data supplemented by test data as the basis to verify the seismic capability of equipment. Generic Letter 87-02 allowed the seismic verification to be accomplished by utilities through a generic program, and the Seismic Qualification Utility Group (SQUG) was formed. The SQUG developed a Generic Implementation Procedure (GIP) that documents the seismic verification process, procedures, and methodologies for verifying the seismic qualification of equipment and resolving USI A-46. Supplement 1 of Generic Letter 87-02 endorsed use of the GIP for the seismic qualification process and contained revised licensee actions. Oconee performed the seismic qualification process in accordance with the NRC enforced version of the GIP. In a Safety Evaluation Report, the NRC concluded that Oconee met the purpose and intent of the seismic qualification process and that the corrective actions and modifications provide sufficient basis to close the USI A-46 review at Oconee.

The seismic verification process is considered part of the seismic licensing basis for Oconee, so the seismic qualification criteria developed by the SQUG in response to Generic Letter 87-02 must be considered during mechanical and electrical equipment modifications.

1.4. Codes and Standards The following codes, standards, and specifications were used during the design, construction, testing and in-service inspection of Class 1 Structures:

ASME-1965 - Boiler and Pressure Vessel Code, Sections III, VIII, and IX

AISC - Steel Construction Manual, 6th ed

Regulatory Guide 1.92, Combining Responses And Spatial Components In Seismic Response Analysis, Revision 1, February 1976

Regulatory Guide 1.29, Seismic Design Classification, Revision 3, September 1978

Supplement No. 1 To Generic Letter (GL) 87-02 That Transmits Supplemental Safety Evaluation Report NO.2 (SSER NO. 2) On SQUG Generic Implementation Procedure Revision 2, As Correction On February 14, 1992 (GIP-2), May 22, 1992

NRC Letter To SQUG Dated December 4, 1997. Supplemental Safety Evaluation Report NO. 3 (SSER NO. 3) On The Review Of Revision 3 To The Generic Implementation Procedure For Seismic Verification Of Nuclear Power Plant Equipment, Updated 5/16/97 (GIP-3)

NRC Letter To SQUG Dated 6/23/99, Review Of Seismic Qualification Utility Group's Report on the use of Generic Implementation Procedure for New and Replacement Equipment and Parts Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 4 of 13

Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3

2. Personnel Qualifications The personnel involved in the Oconee NTTF Recommendation 2.3 Seismic Walkdown effort met the qualification requirements of EPRI 1025286. The personnel responsibilities and qualifications are outlined in TABLE 2.1 below. (Note: PE=Professional Engineer, CLB=Current License Basis, SWEL= Seismic Walkdown Equipment List)

Table 2.1 Personnel Degree Years of Relevant E

" >0 >

Experience Qualifications E --- w Russell Childs PE, SCEI', SWEf7* X(3) X (Duke Energy) BS/Civil Engineering 30IPEEE Ray Mc Coy BS/Civil Engineering 32 PESCE X (Duke Energy)

Bob Hester (DukesEer BS/Civil Engineering 36 PESCE X (Duke Energy)

Paul Mabry BS/Nuclear 27 SRO('), STA(5) X (Duke Energy) Engineering Tommy Loflin AS/Electrical 35+ SRO(4) X (Duke Energy) Engineering Jim Weir BS/Mechanical 31 SWE'2),

(Duke Energy) Engineering SFC SYS ENG Charles M. BS/Civil Engineering 28 PE,SCE(1 ), SWE (2) X(3)

Conselman (ARES)

James White (ARES) BS/Civil Engineering 42 PE,SCE11), SWE (2) X(3)

John North (ARES) BS/Civil Engineering 28 PE,SWE(2) X(3)

Mike Donnelly BS/Civil Engineering 4 SWE(2) X (ARES)

Anthony Fazio BS/Chemical 40+ SWE(2) X (Shaw) Engineering John Spizuoco BS/Mechanical 44 PE,SCE('), SWE(2) X (Shaw) Engineering Arthur Richert BS/Mechanical 32 PE,SWE(2) X (Shaw) Engineering Paul Baughman BS/Civil Engineering >40 PE,SCE(1 ), SWE (2)

(ARES)

George Bushnell BS/Mechanical >40 PE,SCE(1 ), SWE (2) X (Shaw) Engineering Robert L. Keiser MS/Civil Engineering >20 PE,SCE(1 ), SWE (2) X (Duke Energy)

NOTES:

1) Seismic Capability Engineers (SCEs) who have successfully completed EPRI Experience Based Seismic Evaluation training.

2) Seismic Walkdown Engineers (SWEs) have successfully completed EPRI 1025286 2 day walkdown training course.

3) Senior Team Member.

4) Prior Senior Reactor Operator (SRO).

5) Prior Shift Technical Advisor

6) IPEEE seismic Walkdown Coordinator and current A-46/IPEE Program Owner (SQUG)

3. Selection of SSCs The Oconee Unit 2 SWEL-1 and SWEL-2 equipment selection was performed in accordance with the EPRI guidance outlined in EPRI Technical Report #1025286. SWEL-1 represents a Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 sample of items to safely shut down the reactor and rmrairntain containment integrity. SWEL-2 represents spent fuel pool related items.

The Oconee USI A-46/IPEEE Safe Shutdown Equipment List (SSEL) was used as the basis for the Base-1 equipment list. The scope of the Seismic Walkdown Equipment List (SWEL) is limited to SSCs that are classified as Seismic Category I. This is done such that items have a defined seismic licensing basis against which to evaluate the as-installed configuration. Oconee is a USI A-46 plant. The purpose of the USI A-46 program was to verify the seismic adequacy of essential equipment in older operating plants that had not been qualified in accordance with more recent criteria. Many of the SSC's listed in the USI A-46/IPEEE Safe Shut down Equipment List (SSEL) are not category I. However, Oconee programmatically maintains the seismic capability of these components. Therefore, for the purpose of developing the SWEL all USI A-46/IPEEE components are considered to have a seismic licensing basis.

The A-46/IPEEE SSEL effectively represents the output of EPRI guidance equipment Screening criteria's #1, #2 and #3. The underlying data used to generate the Base-1 list is contained in an ACCESS database. This ACCESS database was used to generate the Base-1 Equipment List from which the SWEL-1 was selected. The equipment comprising the Base-1 equipment list is contained in Attachment 1. Their individual Safety Function is identified as shown below. Some components support more than one safety function.

A. Reactor reactivity control B. Reactor coolant pressure control C. Reactor coolant inventory control D. Decay heat removal E. Containment function The Base-1 Equipment List is comprised of 2264 components from Oconee Units 1, 2 & 3 &

components that support all 3 Units (Common). The Base-1 Equipment list is contained in Attachment 1.

3.1. SWEL-1 Development EPRI TN-1 025286 specifies that the SWEL-1 should be comprised of between 90-120 components and that each unit should have its own individual SWEL-1.

357 of the Base-1 components are Common components that support all 3 units. In order to account for these common components, -10% (39 items) of the base-1 common components were selected as SWEL-1 components. All of the 39 common components are considered to be part of each individual unit's SWEL-1.

The Unit 2 SWEL-1 consists of 131 components. Of these 131 components, 39 are common components which are also represented in each individual unit's SWEL-I. Attachment 2 contains the SWEL-1 components for Unit 2. The criteria for selection of equipment to be included in the SWEL are described in EPRI TN-1025286 section 3 Screen #4 -- Sample Considerations -

Five sample selection attributes that should be represented in SWEL 1:

" A variety of types of systems

" Major new and replacement equipment

" A variety of types of equipment

" A variety of environments

" Equipment enhanced due to vulnerabilities identified during the IPEEE program Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 6 of 13

Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 In addition to the five sample considerations listed above, the equipment selected for the SWEL-1 should include considerations of the contribution to Risk for the SSC's and should also include a review by appropriate Operations personnel.

SWEL-1 Systems -

The SWEL-1 equipment list represents 23 systems associated with the 5 safety functions.

SWEL-1 Types of Equipment -

The SWEL-1 lists contain representative equipment from all equipment classes with the following exceptions:

There are no equipment Class 11 (Chillers), Class 12 (Air Compressors), or Class 13 (Motor - Generators) components on the Unit 2 SWEL-1 list because they are not represented in the Base-1 list.

There are no equipment Class 17 (Engine - Generators) components on the Unit 2 SWEL-1. The Standby Shutdown Facility (SSF) Diesel Engine (16 Cylinder)

(OSSFDE000A) is listed on the Base-1 list. However, it was not selected as part of the SWEL-1 due to its inherently robust nature and the very low seismic input at its location.

Class 09 (Fans) are not included in the Unit 2 SWEL-1 but are represented in the SWEL-1 Common components list.

SWEL-1 Equipment locations -

The SWEL-1 equipment list includes equipment located in a broad variety of areas and environments. These areas comprise multiple buildings and elevations and include equipment located both inside and outside. The equipment areas provide a broad range of equipment environmental conditions, which include:

Mild environmental conditions with limited temperature and humidity variations (e.g.

Control Room, Cable Rooms, Equipment Rooms, SSF Electrical Room, Relay House, etc.)

Moderate environmental conditions (e.g. general areas of the Auxiliary Building, East &

West Penetration Rooms, SSF Diesel Room, SSF Battery Room, Control Room Ventilation Rooms, etc.)

Moderate to harsh environmental conditions (e.g. LPI/BS/HPI Pump Rooms, LPI Cooler Room, etc.)

" Harsh environmental conditions (e.g. Inside RB Containment, etc.).

Partial exposure to outdoor environmental conditions (e.g. Switchyard, Intake Structure)

" Wet environments (Keowee Turbine Wheel Pit)

SWEL-1 Maior New and Replacement Equipment -

In order to capture significant new and replacement equipment on the SWEL-1, a query was written which related the Base-1 equipment list to underlying data supporting Engineering Changes in the Duke Energy Nuclear Asset Suite Software (NAS). By doing this, a list EC's associated with all components on the Base-1 equipment list was generated. Editorial and minor modifications were then filtered out of the list. The following New and Replacement Equipment have been included in the Unit 2 SWEL-1.

Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under IOCFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3

.... .Name Engineering*.. " MOD Description.

ID.No. . Change, .

2BSPS0021 RB PRESS HI (ES CH 8) TRAIN B EC0000077068 OD200069 - (REFURB) UNIT 2 RPS REPLACEMENT MODIFICATION 2BSPS0021 RB PRESS HI (ES CH 8) TRAIN B EC0000077067 OD200068 - (REFURB) UNIT 2 ESFAS REPLACEMENT MODIFICATION 2CLT0015A UST 2B LEVEL EC0000075264 NSM ON-23098/O0/O0/AK1 - UPPER SURGE TANK INVENTORY PROTECTION 2CPS0036 UST MAKEUP LEVEL CONTROL EC0000075264 NSM ON-23098/00/00/AK1 - UPPER SURGE TANK (PS-36) INVENTORY PROTECTION 2CVA0192 HOTWELL NORMAL MAKEUP EC0000075356 NSM ON-23098/00/00/AM1 - UPPER SURGE CONTROL TANK INVENTORY PROTECTION 2CRDCACC1 DCRDCS CONTROL CABINET CC-1 EC0000090126 OD200547 - (REFURB) REPLACE CRDM CONTROL SYSTEM 2ELBC2CA CONTROL BATT CHGR 2CA EC0000091849 EC91849 - BKUP PWR-U2 PRESR.HTR AND BAT CHRG 2CA & 2CB FRM PSW 2ELPL2SKP 240/120V PPB 2SKP EC0000049837 NSM ON-43000/00/00/BL1 - OCONEE SERVICE WATER 2ESCA2ESTC2 ESFAS EVEN CH TERM CAB 2ESTC2 EC0000077067 OD200068 - (REFURB) UNIT 2 ESFAS REPLACEMENT MODIFICATION 2ESVTF0001 600/240/120V 2SKM POWER EC0000049837 NSM ON-43000/00/00/BL1 - OCONEE SERVICE TRANSFORMER WATER 2HPIHXOOOA LETDOWN COOLER 2A EC0000104674 ALLOW FOR REPLACEMENT OF 1/2/3 HPI HX OOOA/OOOB (LETDOWN COOLERS) 2LPIFT0004P LPI TRAIN 2B INJ FLOW TRANS EC0000051801 NSM ON-23093/00/O0/AK1 - (REFURB) ECCS AND (Powered by ICCM) OP. EQ., LPI CROSS CONNECT 2LPIFT0004P LPI TRAIN 2B INJ FLOW TRANS EC0000089712 OD200443 - (REFURB) UNIT 2 CONTROL ROOM (Powered by ICCM) CHART REC REPLACEMENT 2RCLT0123 2A RCS HOT LEG LVL (ICCM A) EC0000089712 OD200443 - (REFURB) UNIT 2 CONTROL ROOM CHART REC REPLACEMENT 2RCPT0166P RCS LOOP B PRESS TRANS EC0000077068 OD200069 - (REFURB) UNIT 2 RPS REPLACEMENT MODIFICATION 2RCPT0225 U2 RC LOOP A PRESSURE EC0000090683 OD200614 - REPLACE SSF CONTROL CONSOLE INDICATORS AND RCS PTS 2RCRD0043A PRZ RTD EC0000089712 OD200443 - (REFURB) UNIT 2 CONTROL ROOM CHART REC REPLACEMENT Oconee revised the modification process at the completion of the A-46/IPEEE programs to require plant modifications to evaluate impact to A-46/IPEEE components to ensure that the seismic capability of A-46/IPEEE components was not degraded.

Current site projects such as Protected Service Water (PSW) which are not operational and not currently credited within the Current Licensing Basis of Oconee are not within the scope of the SWEL-1.

SWEL-1 Equipment Enhanced per IPEEE -

Significant IPEEE enhancements associated with the Base-1 equipment list as reported in the IPEEE submittal dated 12/15/1997 were identified. SWEL-1 SSCs were selected such that a sampling of SSCs which had been enhanced per IPEEE was included. The following SWEL-1 SSCs were enhanced due to IPEEE.

, p<I. .)' .11 .

Name E 2ELBK2A 240/120V 2A REGULATOR ONOE-14019 Add weld between 2B/XFMR and plate.

OUTPUT BKR 2ELIRMC12 I INSTRUMENT RACK 2MC-12 ONOE-14280 Add top bracing to instrument rack.

Attachment 5 Contains Security-Sensitive Information -Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 I ,Equip Name Engineering

[E IDNo.**...

ID~am o.Cag=: ,; ..... i . .. Change !' MOD Description' 2ELLX2X1 600V LC 2X01 ONOE-14718 Weld transformer section of Load Centers 2X01 to embedded angle.

2ELLX2X2 600V LC 2X02 ONOE-14719 Weld transformer section of Load Centers 2X02 to embedded angle.

2ELMX2XJ 600V MCC 2XJ ONOE-14377 Repair anchorage or document adequacy of underlying shim plate at rear of MCC 2ELMX2XL MCC 2XL ONOE-14427 Trim cable tray above MCC and restrain horizontally.

2ELMX2XO MCC 2XO ONOE-12879 Add shims to 2XO.

2ELMX2XSF MCC 2XSF(60OV) ONOE-12957 Add padding between 2XSF(208v) and 3XSF(208v).

2ELMX2XSFA MCC 2XSF(208V) ONOE-12957 Add padding between 2XSF(208v) and 3XSF(208v).

2ELTF2B XFMR 2B (600V TO 240V) ONOE-14019 Add weld between 2B/XFMR and plate.

SWEL-1 Risk Considerations -

EPRI TN-1 025286 requires that the development of SWEL 1 should include consideration of the importance of the contribution to risk for the SSCs.

In response to IPEEE, Oconee utilized the results of seismic margin methodology walkdowns to enhance the existing seismic PRA. These results are documented in OSC-10225 "Seismic PRA/IPEEE Backup Calculations" and summarized in the Supplemental IPEEE submittal Report. From the conclusions presented in the Supplemental IPEEE submittal Report, PRA sequences involving loss of power and SSF response make up several of the most dominate PRA cut sets. SSC's supporting Keowee, the SSF and the 230 KV switchyard are well represented in the SWEL-1.

In addition, input was obtained from the General Office PRA group to determine a ranking of the most seismically risk significant components.

Of the 31 unscreened PRA events with a % contribution to CDF > 0, 19 are represented in the combined SWEL-I's for Units 1, 2 &3. This represents 61% of PRA risk significant components and meets the intent of EPRI TN-1 025286 SWEL-1 Operations review -

The SWEL-1 equipment listed was submitted to Oconee Operations for review as recommended within EPRI TN-1 025286. Operations concurred with the equipment listed on the SWEL-1 list. The SWEL-2 equipment list was developed within the Oconee Engineering organization by a highly experienced engineer who had previously held a Senior Reactor Operators License (SRO) and was previously an Operations Shift Technical Advisor (STA).

3.2. SWEL-2 Development The Oconee Unit 2 SWEL-2 spent fuel pool equipment list was developed in accordance with the EPRI guidance. Seismic Category I structures, piping, and containment penetrations were specifically excluded by the EPRI guidance. The four screening criteria specified were as follows:

1) Seismic Category I or USI A-46 (SQUG) licensing bases,

2) Spent Fuel Pool (SFP) equipment appropriate for an equipment walkdown process,

3) Sample considerations represent broad population of equipment with considered sample selection attributes such as:

Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTE Recommendation 2.3

a. represerýt a variety of systems,

b. major new/replacement equipment,

c. variety of equipment types,

d. variety of environments

4) Equipment which could result in rapid drain down of the SFP (includes both seismic and non-seismic components and similar factors outlined in 3) above.

The SWEL-2 equipment Base-2 (Attachment 3) was established based on screens #1 and

2 above. Equipment was selected from the Base-2 list based on screening criteria #3 above, and primarily included major equipment such as the spent fuel cooling system pumps, pump motor air handling units, and heat-exchangers.

The SWEL-2 list was further evaluated based on screening criteria #4 above, to include equipment which could result in SFP rapid drain-down, as defined by the EPRI guidance.

All three Oconee Unit's have SF Pool transfer tubes that open to the SF Pool in normal operation. The SSF RC Make-up and letdown lines penetrate into the SF Pool transfer tubes. The SSF Make-up and Letdown lines meet Seismic Category 1. There were also SF Pool discharge lines at valves SF22&50 and 3SF-22&50 that could meet the criteria for a rapid drain down due to a siphon if the SF Cooling pump discharge piping, which meets Seismic Category 1, were to fail outside the SF Pool. However, this vulnerability had previously been identified and procedure requirements prevent system alignment and thereby remove this vulnerability. For these reasons, there are no rapid draw down items on the SWEL-2.

The SWEL-2 components were selected based on their radiological accessibility. Of the 3 pumps identified in the SWEL-2 base list, 2 were included in the SWEL-2. Of the 7 Tanks identified in the SWEL-2 base list, 4 were included in the SWEL-2. This sampling is in accordance with EPRI TN-1025286.

The final SWEL-2 list is provided in Attachment 4.

4. Seismic Walkdowns and Area Walk-Bys SWEL-1 SSCs which could only be accessed during an outage will be walked down by Duke Energy personnel and reported on at a later date. These SSCs are listed below.

unit Bldg""' Equip ID No. Name 2 AB 2MSVA0016 MAIN STEAM SAFETY RELIEF 2 RB 2CFTKOOOA CORE FLOOD TANK 2A 2 RB 2FDWLT0066 S/G 2A LEVEL 2 RB 2HPIFT0157 U2 RC MAKE UP PUMP FLOW 2 RB 2HPIHXOO0A LETDOWN COOLER 2A 2 RB 2HPIPU0005 SSF RC MAKEUP PUMP 2 RB 2RBCHXOOOAAUX AUX RBCU A 2 RB 2RCPT0166P RCS LOOP B PRESS TRANS 2 RB 2RCPT0225 U2 RC LOOP A PRESSURE 2 RB 2RCRD0043A PRZ RTD 2 RB 2RCRD0084A REACTOR OUTLET LOOP 2A 2 RB 2RCVA0005 PRZ STEAM SAMPLE ISOLATION 2 BH1 2ELSHBIT12 BIT INSTRUMENTATION SECTION Duke Energy contracted with the Shaw Group / ARES Corporation team to perform the majority of the NTTF 2.3 seismic walkdowns at Oconee Nuclear Station. A summary report of the Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

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Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 walkdowns along with the individual Seismic Walkdown Checklists and the Area Walk-By Checklists are contained in this report. The NTTF 2.3 Seismic Walkdown Report for Unit 2 is contained in Attachment 5.. Items found to be inaccessible during this walkdown are addressed below.

Inaccessible SSCs -

No Unit 2 SSC's were inaccessible due to their physical location or due to personnel safety concerns.

The anchorage for one SSC was only partially visible due to some of the welds being covered by mortar spillage from an adjacent masonry wall. A station Work request has been written to clean the weld area and the welds will be evaluated at a later date. This Item and several other inaccessible items listed below are common to all 3 units but will be included in the Unit 1 update report.

0 SYD OSYDPLSYDC1 SWITCHYARD DISTRIBUTION CENTER 1 K1 KEO K1PMGDTMPU1A SPEED CONTROL MAGNETIC PICKUP 1A K2 KEO K2ELKTNO203 TERM BOX TB-203 K2 KEO K2GAHX0003 GEN AIR COOLER 3 K2 KEO K2HPOPU88HA AC GEN HP LIFT PUMP (88HA)

K2 KEO K2TSLS63SB TURB SUMP LEVEL SWITCH (2TSLS0002)

An update to this report will be submitted by April 15, 2014. The update will provide the results associated with the Outage deferred items. Associated Area Walk bys for the listed components will be completed in conjunction with the individual SSC's.

5. Licensing Basis Evaluations A total of 17 potential adverse conditions were identified per the Seismic Walkdowns and the A total of 13 potential adverse conditions were identified per the Seismic Walkdowns and the Area walk-bys. All of these potential issues were entered into the Corrective Action Program (CAP).

All potential adverse conditions were evaluated for their compliance with the seismic licensing basis within the CAP and were found to be acceptable. Station Work Requests were written for some conditions as good practice. The potential adverse conditions and their individual Problem Investigation process (PIP) tracking numbers are listed in the NTTF 2.3 Seismic Walkdown Report for Unit 2 contained in Attachment 5.

6. IPEEE Vulnerabilities Resolution Report Oconee submitted its response to IPEEE on 12/21/1995 & 12/15/1997. In those submittals, Oconee stated that there were no underlying significant sequences (vulnerabilities) from external events. There were also no plant changes identified that would significantly reduce risk from external events.

Table 6-1 of the IPEEE Submittal dated 12/15/1997 listed 152 enhancements. The enhancements identified have been completed by either Station Work Request, Plant Modification or Analysis.

Oconee is a USI A-46 plant and performed the USI A-46 walkdowns in conjunction with the IPEEE walkdowns. In Oconee's letter to the NRC dated 9/12/2002, Oconee confirmed that outliers associated with Generic Letter 87-02 (USI A-46) have been completed. Oconee performed the USI A-46 seismic evaluations in conjunction with the IPEEE evaluations. The Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 criteria for both programs were conservatively enveloped such that an evaluation of a given component would address all aspects of both programs. IPEEE enhancements are a subset of the overall USI A-46 outliers. Therefore, implementation of the IPEEE enhancements is confirmed by the 9/12/2002 SQUG Outlier Resolution Completion Notice.

7. Peer Review Duke Energy (Duke) contracted with the Shaw Group (Shaw) / ARES Corporation (ARES)

Team to perform the NTTF 2.3 peer review at the Oconee Nuclear Station (ONS). The Peer Review Report is contained in Attachment 6.

The Peer Review Team consisted of three individuals, all of whom have seismic engineering experience as it applies to nuclear power plants. These individuals participated in the peer review of each of the activities. The members of the Peer review team and their qualifications are listed in table 2.1 The Peer Review team concluded that the Shaw/ARES methodology conforms to the guidance in Section 6 of EPRI 1025286. The peer review covered the following:

The selection of the SSCs included on the Seismic Walkdown Equipment List (SWEL).

A sample of the checklists prepared for the seismic walkdowns and area walk-bys.

The licensing basis evaluations.

The decisions for entering the potentially adverse conditions in the Corrective Action Program (CAP) process.

The submittal report.

The peer review process for the SWEL development and the seismic walkdowns consisted of the following:

Reviewing the activity guidance in EPRI 1025286, the NEI Q&A bulletins, the NEI first-mover reports, and NRC Temporary Instruction 2515/188.

Conducting an in-process review at the plant site, including interviews with the personnel performing the activity and reviewing in-process documentation.

Performing an in-plant surveillance (for the walkdown activity) of a seismic walkdown and an area walk-by.

Providing in-process observations and comments to the personnel performing the activities.

" Conducting a final review of a sample of the completed documentation.

The peer review process for the licensing basis evaluations and the decisions for entering potentially adverse conditions into the CAP consisted of reviewing the overall review process and a sample of the licensing basis reviews. The peer review process for the submittal report consisted of reviewing the draft submittal prepared by Oconee Design Engineering for licensing review.

The conclusion of the peer review is that the ONS NTTF 2.3 seismic walkdown effort has been conducted in accordance with the guidance in EPRI 1025286. Comments made during the in-process review of the SWEL development and the walkdowns have been addressed Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under IOCFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 2 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 satisfactorily. In-process comments on the final walkdown reports, the licensing basis reviews, and the submittal have also been resolved.

REFERENCES:

1) UFSAR Section 3.2.1 Seismic Classification (Rev. 21)

2) UFSAR Section 2.5.1.2 Site Geology (Rev. 21)

3) UFSAR Sections 2.5.2.10, 2.5.2.11 SSE/OBE (Rev. 21)

4) UFSAR Section 3.7 Seismic Design (Rev. 21)

5) EPRI Report 1025286, Dated May 2012, Seismic Walkdown Guidance for Resolution of Fukushima Near-Term Task Force (NTTF) Recommendation 2.3 (ATTACHMENT 1).

6) Oconee NRC Response to GL 88-20, Individual Plant Examination of External Events (IPEEE)

Submittal, dated Dec. 18, 1997, W. R.McCollum Jr. to NRC.

7) 7/9/12 correspondence to NRC from Ben C.Waldrep, "Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident" ATTACHMENTS:

1) Oconee Unit 2 SWEL-1 Base-1 List

2) Oconee Unit 2 SWEL-1

3) Oconee Unit 2 SWEL-2 Base-2 List and Rapid Drain Down List

4) Oconee Unit 2 SWEL-2

5) Seismic Walkdown Summary Report and Checklists

6) PEER Review Summary Report Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

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Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 0 CCW CD 0001 SSF HVAC CONDENSER 1 SSF 817 B,C 0 CCW CD 0002 SSF HVAC CONDENSER 2 SSF 817 B,C 0 CCW PU 0001 AUX SERVICE WATER PUMP AB 771 D 0 CCW PU 0002 SSF AUX SERVICE WATER PUMP SSF 754 D 0 CCW PU 0003 HVAC SERVICE WTR PUMP 1 SSF 754 B,C 0 CCW PU 0004 HVAC SERVICE WTR PUMP 2 SSF 754 B,C 0 CCW PU 0005 SSF DIESEL WATER JACKET PUMP SSF 754 B,C 0 CCW PU 0010 SSF SUBMERSIBLE PUMP SSF 796 B,C 0 DA TK OOOA DIESEL STARTING AIR TANK A SSF 777 B,C 0 DA TK 000B DIESEL STARTING AIR TANK B SSF 777 B,C 0 DA TK OOOC DIESEL STARTING AIR TANK C SSF 777 B,C 0 DA TK 0OOD DIESEL STARTING AIR TANK D SSF 777 B,C 0 DJW HX OOOA SSF DJW HEAT EXCHANGER A SSF 777 B,C 0 DJW HX 000B SSF DJW HEAT EXCHANGER B SSF 777 B,C 0 EL BS 4160CT4 4160V STANDBY BUS FDR FROM XFMR CT4TO BIT & B2T TB 796 A, B, C, D, E 0 EL BS CCTRENCH CONTROL CABLE TRENCH (SWYD TO OCONEE) SYD 770 A, B, C, D, E 0 EL BS UFCT4 UNDERGROUND FEEDER (KEOWEE TO CT4) SYD 770 A, B, C, D, E 0 EL CA SYTC1 SWYD TERMINAL CABINET 01 SYD 770 A, B, C, D, E 0 EL CA SYTC12 SWYD TERMINAL CABINET 12 SYD 770 A, B, C, D, E 0 EL CA SYTC15 SWYD TERMINAL CABINET 15 SYD 770 A, B, C, D, E 0 EL CA SYTC17 SWYD TERMINAL CABINET 17 SYD 770 A, B, C, D, E 0 EL CA SYTC18 SWYD TERMINAL CABINET 18 SYD 770 A, B, C, D, E 0 EL CA SYTC19 SWYD TERMINAL CABINET 19 SYD 770 A, B, C, D, E 0 EL CA SYTC2 SWYD TERMINAL CABINET 02 SYD 770 A, B, C, D, E 0 EL CA SYTC3 SWYD TERMINAL CABINET 03 SYD 770 A, B, C, D, E 0 EL CA SYTC4 SWYD TERMINAL CABINET 04 SYD 770 A, B, C, D, E 0 EL CA SYTC5 SWYD TERMINAL CABINET 05 SYD 770 A, B, C, D, E 0 EL CA SYTC8 SWYD TERMINAL CABINET 08 SYD 770 A, B, C, D, E 0 EL PL CT4FSC CT4 FAN SPEED CABINET TB 796 A, B, C, D, E 0 EL PL DCSF 125 VDC POWER PNL BRD DCSF SSF 777 A, B, C, D, E 0 EL PL DCSF1 125 VDC DISTRIBUTION CENTER DCSF-1 SSF 777 A, B, C, D, E 0 EL PL KSF 208/120VAC SSF VITAL PWR PNL (GRAY) SSF 777 A, B, C, D, E 0 EL PL KSFC 120V PPB KSFC SSF 777 A, B, C, D, E 0 EL SH ASWS AUX SERV WATER SWGR (4160V) (1TD-0) AB 771 A, B, C, D, E 0 EL SH BlTO5 SKI CT4 TO STDBY BUS 1 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH BlT09 SL1 CT5 STDBY BUS 1 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH BITlO AUX SERVICE WATER SWGR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH B2T05 SL2 CT5 STDBY BUS 2 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH B2T09 SK2 CT4 STDBY BUS 2 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH DGSWGR DIESEL GENERATOR SWITCHGEAR SSF 777 A, B, C, D, E 0 EL TF OCT4 XFMR CT-4 BH3 796 A, B, C, D, E 0 EL TF OCT5 XFMR CT-S YD 796 A, B, C, D, E 0 FO PU 0005 SSF DIESEL ENGINE FUEL OIL TRANSFER PUMP SSF 777 B,C 0 FO TK 0003 SSF DIESEL OIL DAY TANK SSF 777 B,C Page 1 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 0 FO TK 0004 SSF DIESEL OIL STORAGE TANK YD 785 B,C 0 HPS PG 0012 JOCKEY PUMP DISCH. PRESS. GAGE TB 775 B,C 0 HPS PG 0013 HPSW PUMP B DISCH. PRESS. GAGE TB 775 B,C 0 HPS PG 0016 HPSW PUMP A DISCH. PRESS. GAGE TB 775 B,C 0 HPS PG 0224 HPSW PUMP A STRAINER DP GAGE TB 775 B,C 0 HPS PG 0225 HPSW PUMP B STRAINER DP GAGE TB 775 B,C 0 HPS PG 0226 JOCKEY PUMP STRAINER DP GAGE TB 775 B,C 0 HPS PU 0001 HPSW STANDBY PUMP A TB 775 B,C 0 HPS PU 0002 HPSW STANDBY PUMP B TB 775 B,C 0 HPS PU 0003 HPSW JOCKEY PUMP TB 775 B,C 0 HPS VA 0140 Seal Supply Reg. Valve TB 775 B 0 HPS VA 0147 Seal Supply Reg. Valve TB 775 B 0 HPS VA 0154 Seal Supply Reg. Valve TB 775 B 0 LPS FL OOOA LPSW PUMP A STRAINER TB 775 D 0 LPS FL 000B LPSW PUMP B STRAINER TB 775 D 0 LPS FL 0OOC LPSW PUMP C STRAINER TB 775 D 0 LPS PS 0097 A LPSW HDR PRESS #1 TB 775 D 0 LPS PS 0098 A LPSW HDR PRESS #2 TB 775 D 0 LPS PU OOOA LPSW PUMP A TB 775 D 0 LPS PU 000B LPSW PUMP B TB 775 D 0 LPS PU 0OOC LPSW PUMP C TB 775 D 0 LPS VA 0175 LPSW PUMP A SEAL FLOW REG TB 775 D 0 LPS VA 0182 LPSW PUMP B SEAL FLOW REG TB 775 D 0 LPS VA 0189 LPSW PUMP C SEAL FLOW REG TB 775 D 0 NI CA 0225 SSF NUCLEAR INSTRUMENTATION RACK SSF 777 A, B, C, D, E 0 RCW HX 0O0A A RCW HEAT EXCHANGER TB 775 D 0 RCW HX 000B B RCW HEAT EXCHANGER TB 775 D 0 RCW HX O0OC C RCW HEAT EXCHANGER TB 775 D 0 RCW HX 000D D RCW HEAT EXCHANGER TB 775 D 0 SSF BA DCSF DCSF SSF NORMAL BATTERY SSF 777 A, B, C, D, E 0 SSF BA DCSFS DCSFS SSF STANDBY BATTERY SSF 777 A, B, C, D, E 0 SSF CA 0002 PZR HEATER CAB (SSF)SSF PRESSURIZER HEATER CABINET (PHC) SSF 777 A, B, C, E 0 SSF CA 0003 SSF PRESSURIZER HEATER CABINET (PHC1) SSF 777 A, B, C, E 0 SSF CA ICI SSF EOC SYS INTERCONN CAB ICI SSF 797 A, B, C, D, E 0 SSF CA IC2 SSF EOC SYS INTERCONN CAB IC2 SSF 797 A, B, C, D, E 0 SSF CA MEC MISC EQUIP CAB SSF 797 A, B, C, D, E 0 SSF DE O00A SSF DIESEL ENGINE B (16 CYL) SSF 777 A, B, C, D, E 0 SSF MX XSF MCC XSF(600V) SSF 777 A, B, C, D, E 0 SSF PL SSFCP SSF CONTROL PANEL SSF 797 A, B, C, D, E 0 SSF SH OTS1 OTS1 SSF ESSENTIAL SWGR 4160V SSF 777 A, B, C, D, E 0 SYD BA SY1 230KV SWYD BATTERY #SY1 SYD 770 A, B, C, D, E 0 SYD BA SY2 230KV SWYD BATTERY #SY2 SYD 770 A, B, C, D, E 0 SYD BC SY1 230KV SWYD BATTERY CHARGER SY1 SYD 770 A, B, C, D, E 0 SYD BC SY2 230KV SWYD BATTERY CHARGER SY2 SYD 770 A, B, C, D, E Page 2 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 0 SYD BD RB02 SWITCHYARD RELAY BOARD RB02 SYD 770 A, B, C, D, E 0 SYD BD RB03 SWITCHYARD RELAY BOARD RB03 SYD 770 A, B, C, D, E 0 SYD BD RBO6 SWITCHYARD RELAY BOARD RB06 SYD 770 A, B, C, D, E 0 SYD BD RB07 SWITCHYARD RELAY BOARD RB07 SYD 770 A, B, C, D, E 0 SYD BD RB08 SWITCHYARD RELAY BOARD RB08 SYD 770 A, B, C, D, E 0 SYD BD RB1O SWITCHYARD RELAY BOARD RB1O SYD 770 A, B, C, D, E 0 SYD BD RB17 SWITCHYARD RELAY BOARD RB17 SYD 770 A, B, C, D, E 0 SYD BD RF02 SWITCHYARD RELAY BOARD RF02 SYD 770 A, B, C, D, E 0 SYD BD RF03 SWITCHYARD RELAY BOARD RFO3 SYD 770 A, B, C, D, E 0 SYD BD RF06 SWITCHYARD RELAY BOARD RF06 SYD 770 A, B, C, D, E 0 SYD BD RF17 SWITCHYARD RELAY BOARD RF17 SYD 770 A, B, C, D, E 0 SYD BD SRB06 SWITCHYARD RELAY BOARD SRB06 SYD 770 A, B, C, D, E 0 SYD BD SRB09 SWITCHYARD RELAY BOARD SRB09 SYD 770 A, B, C, D, E 0 SYD BD SRB14 SWITCHYARD RELAY BOARD SRB14 SYD 770 A, B, C, D, E 0 SYD BD SRB15 SWITCHYARD RELAY BOARD SRB15 SYD 770 A, B, C, D, E 0 SYD BD SRB17 SWITCHYARD RELAY BOARD SRB17 SYD 770 A, B, C, D, E 0 SYD BD SRF06 SWITCHYARD RELAY BOARD SRF06 SYD 770 A, B, C, D, E 0 SYD BD SRF07 SWITCHYARD RELAY BOARD SRF07 SYD 770 A, B, C, D, E 0 SYD BD SRF08 SWITCHYARD RELAY BOARD SRF08 SYD 770 A, B, C, D, E 0 SYD BD SRF09 SWITCHYARD RELAY BOARD SRF09 SYD 770 A, B, C, D, E 0 SYD BD SRF1O SWITCHYARD RELAY BOARD SRF1O SYD 770 A, B, C, D, E 0 SYD BD SRF17 SWITCHYARD RELAY BOARD SRF17 SYD 770 A, B, C, D, E 0 SYD BK PCB08 230KV AC POWER CIRCUIT BREAKER 08 (PCB-08) SYD 770 A, B, C, D, E 0 SYD BK PCB09 230KV AC POWER CIRCUIT BREAKER 09 (PCB-09) SYD 770 A, B, C, D, E 0 SYD BK PCB12 230KV AC POWER CIRCUIT BREAKER 12 (PCB-12) SYD 770 A, B, C, D, E 0 SYD BK PCB15 230KV AC POWER CIRCUIT BREAKER 15 (PCB-15) SYD 770 A, B, C, D, E 0 SYD BK PCB33 230KV AC POWER CIRCUIT BREAKER 33 (PCB-33) SYD 770 A, B, C, D, E 0 SYD BS 230KRED 230KV SWITCHYARD RED BUS SYD 770 A, B, C, D, E 0 SYD BS 230KYEL 230KV SWITCHYARD YELLOW BUS SYD 770 A, B, C, D, E 0 SYD BS TRENCH MISC SWYD TRENCHES SYD 770 A, B, C, D, E 0 SYD PL DYA DC PAN ELBOARD A SYD 770 A, B, C, D, E 0 SYD PL DYB DC PANELBOARD B SYD 770 A, B, C, D, E 0 SYD PL DYC DC PANELBOARD C SYD 770 A, B, C, D, E 0 SYD PL DYE DC PANELBOARD E SYD 770 A, B, C, D, E 0 SYD PL DYF DC PANELBOARD F SYD 770 A, B, C, D, E 0 SYD PL DYG DC PANELBOARD G SYD 770 A, B, C, D, E 0 SYD PL SYDC1 SWITCHYARD DISTRIBUTION CENTER 1 SYD 770 A, B, C, D, E 0 SYD PL SYDC2 SWITCHYARD DISTRIBUTION CENTER 2 SYD 770 A, B, C, D, E 0 SYD TF RBPT RED BUS POTENTIAL TRANSFORMER (EGPS) SYD 770 A, B, C, D, E 0 SYD TF YBPT YELLOW BUS POTENTIAL TRANSFORMER (EGPS) SYD 770 A, B, C, D, E 0 VS AH 0042 AHU 0-42 HEATING AND A/C SSF BUILDING SSF 817 B,C 0 VS AH 0044EX1 SSF CONST VENT SUPPLY FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX2 SSF SUMMER VENT SUPPLY FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX3 SSF ON LINE VENT SUPPLY FAN & MOTOR SSF 817 B,C Page 3 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 0 VS AH 0044EX4 SSF ENGINE EX FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX5 SSF SUMMER EXHAUST FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX6 SSF ON LINE EXHAUST FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX7 SSF CONSTANT EXHAUST FAN & MOTOR SSF 817 B,C 0 VS DA CDO1 SSF CONSTANT VENTILATION (VS-AH-0044EX1) EXHAUST FAN DAMPER SSF 817 B,C 0 VS DA CD02 SSF SUMMER VENTILATION (VS-AH-044EX2) EXHAUST FAN DAMPER SSF 817 B,C 0 VS DA CD03 SSF ON-LINE VENTILATION (VS-AH-0044EX3) EXHAUST FAN DAMPER SSF 817 B,C 0 VS DA ID01 SSF INLET DAMPER ID-1 (AH EXHAUST FAN AH0044EX4) SSF 817 B,C 0 VS DA ID01E ACTUATOR FOR INTAKE DAMPER SSF-ID-A & B SSF 817 B,C 0 VS DA ID01W ACTUATOR FOR INTAKE DAMPER SSF-ID-C & D SSF 817 B,C 0 VS DA ID02 INLET DAMPER ID-2 (SSF AH EXH FAN AHOO44EX3) SSF 817 B,C 0 VS DA ID02A ACTUATOR FOR INLET DAMPER SSF-ID2 (EXH FAN AH0044EX3) SSF 817 B,C 0 VS DA ID03 SSF INLET DAMPER ID-3 (AH EXHAUST FAN AH0044EX1) SSF 817 B,C 0 VS DA ID03A ACTUATOR FOR INLET DAMPER SSF-ID3 (EXH FAN AH0044EX1) SSF 817 B,C 0 VS DA ID04 SSF INLET DAMPER ID-4 (AH EXHAUST FAN AH0044EX2) SSF 817 B,C 0 VS DA ID04A ACTUATOR FOR INLET DAMPER SSF-ID4 (EXH FAN AH0044EX2) SSF 817 B,C 0 VS DA XD01 SSF EXH DAMPER XD-1 (AH EXH. FAN AH0044EX4) SSF 817 B,C 0 VS DA XD01E ACTUATOR FOR EXH DAMPER SSF-XD-A&B SSF 817 B,C 0 VS DA XD01W ACTUATOR FOR EXH DAMPER SSF-XD-C&D SSF 817 B,C O VS DA XD02 SSF PRESS OPER EXH DAMPER XD-2 (AH EXH FAN AH0044EX7) SSF 817 B,C 0 VS DA XD03 SSF EXH DAMPER XD-3 (AH EXH FAN AH0044EX1) SSF 817 B,C 0 VS DA XD03A ACTUATOR FOR EXH DAMPER SSF-XD3 (EXH FAN AH0044EX1) SSF 817 B,C 0 VS DA XD04 SSF PRESS OPER EXH DAMPER XD-4 (AH EXH. FAN AHO044EX5) SSF 817 B,C 0 VS DA XD05 SSF EXH DAMPER XD-5 (AH EXH. FAN AH0044EX2) SSF 817 B,C 0 VS DA XDO5A ACTUATOR FOR EXH DAMPER SSF-XD5 (EXH FAN AH0044EX2) SSF 817 B,C 0 VS DA XD06 SSF PRESS OPER EXH DAMPER XD-6 (AH EXH. FAN AH0044EX6) SSF 817 B,C 0 VS PE SSFPE01 SSF SUMMER VENT. SYSTEM (VH) EXHAUST FAN (SSF-XF-3) SSF 825 A, B, C, D, E 0 VS PE SSFPE02 SSF A/C SYSTEM AIR HANDLING UNIT SSF TBD A, B, C, D, E 0 VS PL CP01AH2 SSF CONTROL BOARD FOR THE HVAC SYSTEM SSF 817 A, B, C, D, E 0 VS PS SSFPS01 SSF CONSTANT VENTILATION SYSTEM SUPPLY FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS02 SSF SUMMER VENTILATION SYSTEM SUPPLY FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS03 SSF ON-LINE VENTILATION SYSTEM SUPPLY FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS04 SSF CONSTANT VENTILATION SYSTEM EXHAUST FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS05 SSF SUMMER VENTILATION SYSTEM EXHAUST FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS06 SSF ON-LINE VENTILATION SYSTEM EXHAUST FAN SSF 822 A, B, C, D, E O VS PS SSFPS07 SSF ENGINE VENTILATION SYSTEM EXHAUST FAN SSF 782 A, B, C, D, E 0 VS PS SSFPS08 SSF A/C SYSTEM AIR FLOW PRESS SWITCH SSF TBD A, B, C, D, E 0 VS TT SSFCT1 HVAC TEMPERATURE CONTROLLER (FOR SSF-AH-1) SSF 822 A, B, C, D, E 0 VS TT SSFCT2 HVAC TEMPERATURE CONTROLLER (FOR SSF-CP-1) SSF 822 A, B, C, D, E 2 AS PT 0117P AUX STEAM PRESSURE TRANSMITTER (MS-126 & MS-129) TB 796 D 2 BAG BD 2AB1 CONTROL BOARD 2AB1 AB 822 A, B, C, D, E 2 BAG BD 2AB2 CONTROL BOARD 2AB2 AB 822 A, B, C, D, E 2 BAG BD 2AB3 CONTROL BOARD 2AB3 AB 822 A, B, C, D, E 2 BAG BD 2UBI CONTROL BOARD 2UB1 AB 822 A, B, C, D, E Page 4 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 BAG BD 2UB2 CONTROL BOARD 2UB2 AB 822 A, B, C, D, E 2 BAG BD 2VB1 CONTROL BOARD 2VB1 AB 822 A, B, C, D, E 2 BAG BD 2VB2 CONTROL BOARD 2VB2 AB 822 A, B, C, D, E 2 BAG BD 2VB3 CONTROL BOARD 2VB3 AB 822 A, B, C, D, E 2 BS PS 0018 RB PRESS HI (ES CH 7) TRAIN A AB 809 E 2 BS PS 0019 RB PRESS HI (ES CH 8) TRAIN B AB 809 E 2 BS PS 0020 RB PRESS HI (ES CH 7) TRAIN A AB 809 E 2 BS PS 0021 RB PRESS HI (ES CH 8) TRAIN B AB 809 E 2 BS PS 0022 RB PRESS HI (ES CH 7) TRAIN A AB 809 E 2 BS PS 0023 RB PRESS HI (ES CH 8) TRAIN B AB 809 E 2 BS PT 0004P RB PRESS XMTR (ES CH 2A) AB 809 E 2 BS PT 0005P RB PRESS XMTR (ES CH 2B) AB 809 E 2 BS PT 0006P RB PRESS XMTR (ES CH 2C) AB 809 E 2 BS PU 0001 RBS PUMP 2A AB 758 E 2 BS PU 0002 RBS PUMP 2B AB 758 E 2 BS VA 0001 RB SPRAY HEADER 2A ISOLATION AB 809 E 2 BS VA 0002 RB SPRAY HEADER 2B ISOLATION AB 809 E 2 BS VA 0003 RBS PUMP SUCTION ISOL AB 758 E 2 BS VA 0004 RBS PUMP SUCTION ISOL AB 758 E 2 C CD OOOA CONDENSER 2A TB 775 D 2 C CD 000B CONDENSER 2B TB 775 D 2 C CO OooC CONDENSER 2C TB 775 D 2 C DM OOOA POLISHING DEMINERALIZER 2A TB 775 D 2 C DM 000B POLISHING DEMINERALIZER 2B TB 775 D 2 C DM OOC POLISHING DEMINERALIZER 2C TB 775 D 2 C DM O00D POLISHING DEMINERALIZER 2D TB 775 D 2 C DM OOOE POLISHING DEMINERALIZER 2E TB 775 D 2 C HX 002A CONDENSATE COOLER 2A TB 775 D 2 C HX 002B CONDENSATE COOLER 2B TB 775 D 2 C LT 0015A UST 2B LEVEL TB 838 D 2 C LT 0036 UST 2A LEVEL TB 838 D 2 C PS 0015 UST MAKEUP LEVEL CONTROL (PS-15) TB 838 D 2 C PS 0036 UST MAKEUP LEVEL CONTROL (PS-36) TB 838 D 2 C PS 0227 CONDENSATE BOOSTER PUMP SUCTION HEADER PRESS LOW TB 775 D 2 C PU 0010 HOTWELL PUMP 2A TB 775 D 2 C PU 0011 HOTWELL PUMP 2B TB 775 D 2 C PU 0012 HOTWELL PUMP 2C TB 775 D 2 C PU 0019 HOLDING PUMP 2A TB 775 D 2 C PU 0020 HOLDING PUMP 2B TB 775 D 2 C PU 0021 HOLDING PUMP 2C TB 775 D 2 C PU 0022 HOLDING PUMP 2D TB 775 D 2 C PU 0023 HOLDING PUMP 2E TB 775 D 2 C SV 1920 SOLENOID VLV TO HOTWELL NORMAL MAKEUP CONTROL - VALVE 2C- TB 775 D 2 C TK 0003 SLURRY TANK TB 775 D Page 5 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FL EL Safety Function 2 C TK 0O0A UPPER SURGE TANK 2A TB 838 D 2 C TK O0OB UPPER SURGE TANK 2B TB 838 D 2 C TK QOOC UPPER SURGE TANK DOME TB 838 D 2 C VA 0192 HOTWELL NORMAL MAKEUP CONTROL TB 775 D 2 C VA 0391 HOTWELL SUPPLY ISOL TO TDEFW TB 775 D 2 CC HX OOOA COMPONENT COOLER 2A AB 783 A 2 CCW FT 0225 SSF ASW FLOW AB 796 D 2 CCW PL 0268 REMOTE STARTER ENCLOSURE FOR 2CCW-268 SSF 754 D 2 CCW PL 0287 REMOTE STARTER ENCLOSURE FOR 2CCW-287 SSF 758 D 2 CCW PU 0001 CCW PUMP 2A INT 810 D,A 2 CCW PU 0002 CCW PUMP 2B INT 810 D,A 2 CCW PU 0003 CCW PUMP 2C INT 810 D,A 2 CCW PU 0004 CCW PUMP 2D INT 810 D,A 2 CCW PU 0024 EFWPT OIL COOLER PUMP TB 775 C 2 CCW VA 0268 SSF ASW PUMP DISCH ISOL SSF 754 D 2 CCW VA 0269 CROSSOVER ISOLATION TO A RB 777 D 2 CCW VA 0287 SSF ISOL VALVE SSF 754 D 2 CF TK OOOA CORE FLOOD TANK 2A RB 797 B, D 2 CF TK 000B CORE FLOOD TANK 2B RB 817 B,D 2 CRD CA 0001 CRD AC REACTOR TRIP BKR CABINET AB 809 A 2 CRD CA CC1 DCRDCS CONTROL CABINET CC-1 AB 809 A 2 CRD CA CC2 DCRDCS CONTROL CABINET CC-2 AB 809 A 2 CRD CA CC3 DCRDCS CONTROL CABINET CC-3 AB 809 A 2 CRD CA CC4 DCRDCS CONTROL CABINET CC-4 AB 809 A 2 CRD CA CC5 DCRDCS CONTROL CABINET CC-5 AB 809 A 2 CRD CA CC6 DCRDCS CONTROL CABINET CC-6 AB 809 A 2 CRD CA SRPSCC1 DCRDCS CONTROL CABINET SRPS CC1 AB 809 A 2 CRD CA SRPSCC2 DCRDCS CONTROL CABINET SRPS CC2 AB 809 A 2 CS VA 0005 QUENCH TANK DRAIN RB 777 A, B,C 2 CS VA 0006 QUENCH TANK DRAIN AB 758 A, B,C 2 EHC CA EHC1 EHC CAB 2EHC1 AB 809 D 2 EHC CA EHC2 EHC CAB 2EHC2 AB 809 D 2 EHC CA EHC3 EHC CAB 2EHC3 AB 809 D 2 EHC CA EHTC1 EHC TERM CAB 2EHTC1 AB 809 D 2 EHC CA EHTC2 EHC TERM CAB 2EHTC2 AB 809 D 2 EHC SV 1083 MASTER TRIP SOLENOID VALVE A TB 809 D 2 EHC SV 1084 MASTER TRIP SOLENOID VALVE B TB 809 D 2 EL BA 2CA CONTROL BATT 2CA AB 809 A,B,C,D,E 2 EL BA 2CB CONTROL BATT 2CB AB 809 A, B,C, D,E 2 EL BA 2PA PWR BATT 2PA TB 796 A, B,C, D,E 2 EL BA 2PB PWR BATT 2PB TB 796 A,B,C,D,E 2 EL BC 2CA CONTROL BATT CHGR 2CA AB 796 A, B, C, D, E 2 EL BC 2CB CONTROL BATT CHGR 2CB AB 796 A, B, C, D, E 2 EL BC 2PA PWR BATT CHGR 2PA TB 796 A, B, C, D, E Page 6 of 23

Attachment 1 N-.

Oconee Unit2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 EL BC 2PB PWR BATT CHGR 2PB TB 796 A, B, C, D, E 2 EL BI 2DIA 120V STATIC INV 2DIA AB 796 A, B, C, D, E 2 EL BI 2DIB 120V STATIC INV 2DIB AB 796 A, B, C, D, E 2 EL BI 2DIC 120V STATIC INV 2DIC AB 796 A, B, C, D, E 2 EL BI 2DID 120V STATIC INV 2DID AB 796 A, B, C, D, E 2 EL BI 2KI STATIC INVERTER 2KI (INCLUDES STATIC XFER SWITCH) AB *796 A, B, C, D, E 2 EL BI 2KU STATIC INVERTER 2KU (INCLUDES STATIC XFER SWITCH) AB 796 A, B, C, D, E 2 EL BI 2KX STATIC INVERTER 2KX (INCLUDES STATIC XFER SWITCH) AB 796 A, B, C, D, E 2 EL BK 2A 240/120V 2A REGULATOR OUTPUT BKR AB 796 A, B, C, D, E 2 EL BK 2B 240/120V 2B REGULATOR OUTPUT BKR AB 796 A, B, C, D, E 2 EL BS 230CT2 CT2 OVERHEAD FEEDER (SWYD PCB 27 TO CT2) SYD 770 A, B, C, D, E 2 EL BS 4160CT2 4160V STARTUP BUS FROM TRANSFORMER CT2 TB 796 A, B, C, D, E 2 EL BS 4160MFB1 4160V MAIN FEEDER BUS 1, B12, (BITTO 2TC,2TD,2TE) TB 796 A, B, C, D, E 2 EL BS 4160MFB2 4160V MAIN FEEDER BUS 2, B22, (BiT TO 2TC,2TD,2TE) TB 796 A, B, C, D, E 2 EL CA 2AT3 AREA TERM CAB 2AT3 AB 809 A, B, C, D, E 2 EL CA 2AT4 AUXILIARY BENCHBOARD 2AB1 TERMINAL CABINET 2AT4 AB 809 A, B, C, D, E 2 EL CA 2AT8 AREA TERM CAB 2AT8 AB 809 A, B, C, D, E 2 EL CA 2AXTC2 AUX TERMINAL CABINET 2AXTC2 TB 796 A, B, C, D, E 2 EL CA 2EB1 ELECTRICAL BOARD 2EB1 AB 822 A, B, C, D, E 2 EL CA 2EB2 ELECTRICAL BOARD 2EB2 AB 822 A, B, C, D, E 2 EL CA 2EB3 ELECTRICAL BOARD 2EB3 AB 822 A, B, C, D, E 2 EL CA 2EB4 ELECTRICAL BOARD 2EB4 AB 822 A, B, C, D, E 2 EL CA 2EB5 ELECTRICAL BOARD 2EB5 AB 822 A, B, C, D, E 2 EL CA 2EB6 ELECTRICAL BOARD 2EB6 AB 822 A, B, C, D, E 2 EL CA 2EB7 ELECTRICAL BOARD 2EB7 AB 822 A, B, C, D, E 2 EL CA 2EB8 ELECTRICAL BOARD 2EB8 AB 822 A, B, C, D, E 2 EL CA 2EF1 ELECTRICAL BOARD 2EF1 AB 822 A, B, C, D, E 2 EL CA 2EF2 ELECTRICAL BOARD 2EF2 AB 822 A, B, C, D, E 2 EL CA 2EF3 ELECTRICAL BOARD 2EF3 AB 822 A, B, C, D, E 2 EL CA 2EF4 ELECTRICAL BOARD 2EF4 AB 822 A, B, C, D, E 2 EL CA 2EF5 ELECTRICAL BOARD 2EF5 AB 822 A, B, C, D, E 2 EL CA 2EF6 ELECTRICAL BOARD 2EF6 AB 822 A, B, C, D, E 2 EL CA 2EF7 ELECTRICAL BOARD 2EF7 AB 822 A, B, C, D, E 2 EL CA 2EF8 ELECTRICAL BOARD 2EF8 AB 822 A, B, C, D, E 2 EL CA 2MTC1 MISC TERM CAB 2MTC1 AB 809 A, B, C, D, E 2 EL CA 2MTC2 MISC TERM CAB 2MTC2 AB 809 A, B, C, D, E 2 EL CA 2MTC3 MISC TERM CAB 2MTC3 AB 809 A, B, C, D, E 2 EL CA 2MTC4 MISC TERM CAB 2MTC4 AB 809 A, B, C, D, E 2 EL CA 2TTC4 TU RB TERM CAB 2T"C4 TB 796 A, B, C, D, E 2 EL CA SGLC2 STEAM GEN LOGIC CABINET AB 809 A, B, C, D, E 2 EL DI 2ADA ISOL DIODE ASSEMBLY 2ADA AB 796 A, B, C, D, E 2 EL DI 2ADB ISOL DIODE ASSEMBLY 2ADB AB 796 A, B, C, D, E 2 EL DI 2ADC ISOL DIODE ASSEMBLY 2ADC AB 796 A, B, C, D, E 2 EL DI 2ADD ISOL DIODE ASSEMBLY 2ADD AB 796 A, B, C, D, E Page 7 of 23

Attachment 1 OconC Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 EL DI 2ADE ISOL DIODE ASSEMBLY 2ADE AB 796 A, B, C, D, E 2 EL DI 2ADF ISOL DIODE ASSEMBLY 2ADF AB 796 A, B, C, D, E 2 EL DI 2ADG ISOL DIODE ASSEMBLY 2ADG AB 796 A, B, C, D, E 2 EL IR MC1 INSTRUMENT RACK 2MC-1 TB 775 D 2 EL IR MC12 INSTRUMENT RACK 2MC-12 TB 796 D 2 EL IR MC16 INSTRUMENT RACK 2MC-16 TB 796 D 2 EL IR MC2 INSTRUMENT RACK 2MC-2 TB 775 D 2 EL IR PIR UNIT 2 PNEUMATIC INSTR RACK AB 809 B 2 EL LX 2X1 600V LC 2XO1 TB 796 A, B, C, D, E 2 EL LX 2X10 600V LC 2X10 TB 796 A, B, C, D, E 2 EL LX 2X2 600V LC 2XO2 TB 796 A, B, C, D, E 2 EL LX 2X3 600V LC 2XO3 TB 796 A, B, C, D, E 2 EL LX 2X4 600V LC 2XO4 TB 796 A, B, C, D, E 2 EL LX 2X5 600V LC 2XO5 TB 796 A, B, C, D, E 2 EL LX 2X6 600V LC 2X06 TB 796 A, B, C, D, E 2 EL LX 2X8 600V LC 2XO8 AB 796 A, B, C, D, E 2 EL LX 2X9 600V LC 2XO9 AB 796 A, B, C, D, E 2 EL MX 2XA MCC 2XA TB 796 D 2 EL MX 2XAA 208V MCC 2XA-A TB 796 D 2 EL MX 2XB 600V MCC 2XB TB 775 D 2 EL MX 2XC MCC 2XC TB 775 D 2 EL MX 2XGA MCC 2XGA TB 796 D 2 EL MX 2XGB MCC 2XGB TB 796 D 2 EL MX 2Xi 600V MCC 2XI AB 809 D 2 EL MX 2XJ 600V MCC 2XJ AB 809 D 2 EL MX 2XL MCC 2XL AB 771 A, B, C 2 EL MX 2XN MCC 2XN AB 771 A, B, C 2 EL MX 2XO MCC 2XO AB 796 A, B, C, D, E 2 EL MX 2XP MCC 2XP AB 796 A, B, C, D, E 2 EL MX 2XR 600V MCC 2XR AB 838 A 2 EL MX 2XS1 MCC 2XS1 AB 796 A, B, C, D, E 2 EL MX 2XS2 MCC 2XS2 AB 796 A, B, C, D, E 2 EL MX 2XS3 MCC 2XS3 AB 796 A, B, C, D, E 2 EL MX 2XSF MCC 2XSF(600V) SSF 817 A, B, C, D, E 2 EL MX 2XSF1 MCC 2XSF-1 (208V) SSF 797 A, B, C, D, E 2 EL MX 2XSFA MCC 2XSF(208V) SSF 817 A, B, C, D, E 2 EL PL 2CPS 2 POWDEX PANEL TB 775 D 2 EL PL 2DCA 125V DC 2DCA AB 796 A, B, C, D, E 2 EL PL 2DCB 125V DC 2DCB AB 796 A, B, C, D, E 2 EL PL 2DIA 125V DC PPB 2DIA AB 809 A, B, C, D, E 2 EL PL 2DIB 125V DC PPB 2DIB AB 809 A, B, C, D, E 2 EL PL 2DIC 125V DC PPB 2DIC AB 809 A, B, C, D, E 2 EL PL 2DID 125V DC PPB 2DID AB 809 A, B,C,D,E 2 EL PL 2DL2 250V DC PPB 2DL2 AB 796 A, B, C, D, E Page 8 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 EL PL 2DP 125/250V DC 2DP TB 796 A, B, C, D, E 2 EL PL 2EPSLP1 EPSL PANEL 2EPSLP1 AB 809 A, B, C, D, E 2 EL PL 2EPSLP2 EPSL PANEL 2EPSLP2 AB 809 A, B, C, D, E 2 EL PL 2KA 120V PPB 2KA TB 775 A, B, C, D, E 2 EL PL 2KB 120V PPB 2KB TB 796 A, B, C, D, E 2 EL PL 2KC 120V PPB 2KC AB 796 A, B, C, D, E 2 EL PL 2KD 120V PPB 2KD AB 809 A, B, C, D, E 2 EL PL 2KESP KEOWEE EM START PANEL AB 809 A, B, C, D, E 2 EL PL 2KI 120V PPB 2KI AB 809 A, B, C, D, E 2 EL PL 2KM 120V PPB 2KM AB 809 A, B, C, D, E 2 EL PL 2KRA 120V PPB 2KRA AB 809 A, B, C, D, E 2 EL PL 2KRB 120V PPB 2KRB AB 809 A, B, C, D, E 2 EL PL 2KU 120V PPB 2KU AB 809 A, B, C, D, E 2 EL PL 2KVIA 120V PPB 2KVIA AB 809 A, B, C, D, E 2 EL PL 2KVIB 120V PPB 2KVIB AB 809 A, B, C, D, E 2 EL PL 2KVIC 120V PPB 2KVIC AB 809 A, B, C, D, E 2 EL PL 2KVID 120V PPB 2KVID AB 809 A, B, C, D, E 2 EL PL 2KX 120V PPB 2KX AB 809 A, B, C, D, E 2 EL PL 2L21 125V DC PPB 2L21 AB 822 A, B, C, D, E 2 EL PL 2SGFP SG FWP PANEL TB 775 A, B, C, D, E 2 EL PL 2SKJ 120V PPB 2SKJ AB 809 A, B, C, D, E 2 EL PL 2SKK 120V PPB 2SKK AB 809 A, B, C, D, E 2 EL PL 2SKL 120V PPB 2SKL AB 809 A, B, C, D, E 2 EL PL 2SKM 240/120V PPB 2SKM ESV 797 A, B, C, D, E 2 EL PL 2SKN 240/120V PPB 2SKN ESV 797 A, B, C, D, E 2 EL PL 2SKP 240/120V PPB 2SKP ESV 797 A, B, C, D, E 2 EL PL 2TCPA TURB CONT PANEL 2TCPA TB 796 A, B, C, D, E 2 EL PL 2TDC31 TRANSDUCER CAB 2TDC3 AB 809 A, B, C, D, E 2 EL PL HBP UNIT 2 HEATER BLANKETING PANEL TB 822 D 2 EL PL MFBMRP MAIN FDR BUS MONITOR RLY PANEL AB 809 A, B, C, D, E 2 EL PL PZR2B 600V PPB 2B (FOR PRESSURIZER HEATERS GROUP 2B BANK 2) RB 817 A, B, C, D, E 2 EL SH 2TCO1 2TC BUS 1 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 2 EL SH 2TC14 2TC BUS 2 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 2 EL SH 2TDO1 2TD BUS 1 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 2 EL SH 2TD14 2TD BUS 2 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 2 EL SH 2TE01 2TE BUS 1 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 2 EL SH 2TE14 2TE BUS 2 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 2 EL SH B1TO8 S12 STDBY BUS 1 TO MFB1 BKR SECTION BH1 796 A, B, C, D, E 2 EL SH BIT1l N12 MFB1 NORMAL FDR BKR SECTION BH1 796 A, B, C, D, E 2 EL SH B1T12 BIT INSTRUMENTATION SECTION BH1 796 A, B, C, D, E 2 EL SH B1T13 E12 MFB1 STARTUP FDR BKR SECTION BH1 796 A, B, C, D, E 2 EL SH B2TO1 E22 MFB2 STARTUP FDR BKR SECTION BH1 796 A, B, C, D, E 2 EL SH B2T02 B2T POTENTIAL TRANSFORMER SECTION BH1 796 A, B, C, D, E 2 EL SH B2T03 N22 MFB2 NORMAL FDR BKR SECTION BH1 796 A, B, C, D, E Page 9 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 EL SH B2T04 4KV FDR BKR B2T-4 SSF 4KV SWGR OTSI-1 SECTION BH1 796 A, B, C, D, E 2 EL SH B2T06 522 STBY BUS 2 TO MFB2 BKR SECTION BH1 796 A, B, C, D, E 2 EL SX 2KIBKUP BACKUP TRANSFER SWITCH 2KI AB 796 A, B, C, D, E 2 EL SX 2KIBYP INVERTER BYPASS SWITCH 2KI AB 796 A, B, C, D, E 2 EL SX 2KUBKUP BACKUP TRANSFER SWITCH 2KU AB 796 A, B, C, D, E 2 EL SX 2KUBYP INVERTER BYPASS SWITCH 2KU AB 796 A, B, C, D, E 2 EL SX 2KXBKUP BACKUP TRANSFER SWITCH 2KX AB 796 A, B, C, D, E 2 EL SX 2KXBYP INVERTER BYPASS SWITCH 2KX AB 796 A, B, C, D, E 2 EL SX ABXFER 2A/2B REG XFER SW AB 796 A, B, C, D, E 2 EL TF 0CT2 XFMR CT-2 YD 796 A, B, C, D, E 2 EL TF 2A XFMR 2A (600V TO 240V) AB 796 A, B, C, D, E 2 EL TF 2B XFMR 2B (600V TO 240V) AB 796 A, B, C, D, E 2 EL TF 2KB XFMR 2KB (600:208:120V) TB 796 A, B, C, D, E 2 EL TF 2KI ISOLATION XFMR SHIELDED 2KI AB 796 A, B, C, D, E 2 EL TF 2KU ISOLATION XFMR SHIELDED 2KU AB 796 A, B, C, D, E 2 EL TF 2XA XFMR 2XA (600V TO 208V) TB 796 A, B, C, D, E 2 EL TF 2XC XFMR 2XC (600V TO 208V) TB 775 A, B, C, D, E 2 EL TF 2XGA XFMR 2XGA(600V TO 208V) TB 796 A, B, C, D, E 2 EL TF 2XGB XFMR 2XGB (600V TO 208V) TB 796 A, B, C, D, E 2 EL TF 2XL XFMR 2XL (600V TO 208V) AB 771 A, B, C, D, E 2 EL TF 2XN XFMR 2XN (600V TO 208V) AB 771 A, B, C, D, E 2 EL TF 2XO XFMR 2XO (600V TO 208V) AB 796 A, B, C, D, E 2 EL TF 2XP XFMR 2XP (600V TO 208V) AB 796 A, B, C, D, E 2 EL TF 2XR XFMR 2XR (600V/208V) AB 838 A, B, C, D, E 2 EL TF 2XS1A XFMR 2XS1A (600V TO 208V) AB 796 A, B, C, D, E 2 EL TF 2XS2A XFMR 2XS2A (600V TO 208V) AB 796 A, B, C, D, E 2 EL TF 2XS3A XFMR 2XS3A (600V TO 208V) AB 796 A, B, C, D, E 2 EL TF 2XSF XFMR 2XSF (600VTO 208V) SSF 817 A, B, C, D, E 2 EL TN 1001 TERMINAL BOX TB-1001 TB 796 D 2 EL TN 1417 TERMINAL BOX TB-1417 AB 809 D 2 EL TN 1418 TERMINAL BOX TB-1418 AB 809 D 2 EL TN TBSFPC C SPENT FUEL COOLING PUMP PANEL AB 783 A, B, C, D, E 2 EL VR 2A REGULATED PWR SUPP REG 2A AB 796 A, B, C, D, E 2 EL VR 2B REGULATED PWR SUPP REG 2B AB 796 A, B, C, D, E 2 ES CA 0001 ENGINEERED SAFEGUARDS ANALOG CABINET 1 (CHANNEL A)_ AB 822 A, B, C, D, E 2 ES CA 0002 ENGINEERED SAFEGUARDS ANALOG CABINET 2 (CHANNEL B) AB 822 A, B, C, D, E 2 ES CA 0003 ENGINEERED SAFEGUARDS ANALOG CABINET 3 (CHANNEL C) AB 822 A, B, C, D, E 2 ES CA 0004 ENGINEERED SAFEGUARDS LOGIC CABINET It 4 AB 822 A, B, C, D, E 2 ES CA 0005 ENEGINEERED SAFEGUARDS CABINET 5 AB 822 A, B, C, D, E 2 ES CA 0006 ENGINEERED SAFEGUARDS LOGIC CABINET It 6 AB 822 A, B, C, D, E 2 ES CA 0007 ENGINEERED SAFEGUARDS LOGIC CABINET 7 AB 822 A, B, C, D, E 2 ES CA 0008 ES LOGIC CABINET 8 AB 822 A, B, C, D, E 2 ES CA 0009 ES LOGIC CABINET 9 AB 822 A, B, C, D, E 2 ES CA 2ESTC1 ESFAS ODD CH TERM CAB 2ESTC1 AB 809 A, B, C, D, E Page 10 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment Lisf Unit Sys Type Number Description Bldg. FLEL Safety Function 2 ES CA 2ESTC2 ESFAS EVEN CH TERM CAB 2ESTC2 AB 809 A,B,C,D,E 2 ES CA 2ESTC2A ESFAS AUX RLY CAB 2ESTC2A AB 809 A, B,C, D,E 2 ES CA 2ESTC3 ESFAS EVEN/ODD TERM CAB 2ESTC3 AB 809 A, B,C, D, E 2 ESV CA 2ESV1 ESV PUMP CONTROLS RELAY CABINET 2ESVl AB 796 D 2 ESV PL 0001 UNIT 2 ESV LOCAL CONTROL PANEL ESV 797 D 2 ESV PT 0001 ESV Tank Pressure Transmitter ESV 797 D 2 ESV PT 0002 ESV Tank Pressure Transmitter ESV 797 D 2 ESV PU 0001 ESV Pump 2A ESV 797 D 2 ESV PU 0002 ESV Pump 28 ESV 797 D 2 ESV PU 0003 ESV Pump 2C ESV 797 D 2 ESV TF 0001 600/240/120V 2SKM POWER TRANSFORMER ESV 797 D 2 ESV TF 0002 600/240/120V 2SKN POWER TRANSFORMER ESV 797 D 2 ESV TF 0003 600/240/120V 2SKN POWER TRANSFORMER ESV 797 D 2 ESV TK 0001 ESV Receiver Tank 2A ESV 797 D 2 ESV TK 0002 ESV Receiver Tank 2B ESV 797 D 2 ESV VA 0001 ESV Float Valve YD 797 D 2 ESV VA 0002 ESV Float Valve YD 797 D 2 ESV VA 0028 ESV Tank Min. Flow Valve ESV 797 D 2 ESV VA 0029 ESV Tank Min. Flow Valve ESV 797 D 2 FDW FT 0129 2A EFW HEADER FLOW AB 783 D 2 FDW FT 0130 2B EFW HEADER FLOW AB 783 D 2 FDW FT 0153 2A EFW HEADER FLOW TRANSMITTER AB 783 D 2 FDW FT 0154 2B EFW HEADER FLOW TRANSMITTER AB 783 D 2 FDW LT 0066 S/G 2A LEVEL RB 777 D 2 FDW LT 0067 S/G 2B LEVEL RB 777 D 2 FDW LT 0080 SG 2A LEVEL TRANSMITTER RB 777 D 2 FDW LT 0081 SG 2B LEVEL TRANSMITTER RB 777 D 2 FDW LT 0082 SG 2A LEVEL TRANSMITTER RB 777 D 2 FDW LT 0083 SG 2B LEVEL TRANSMITTER RB 777 D 2 FDW PL 0368 REMOTE STARTER ENCLOSURE FOR 2FDW-368 AB 809 D 2 FDW PL 0369 REMOTE STARTER ENCLOSURE FOR 2FDW-369 AB 809 D 2 FDW PL 0372 REMOTE STARTER ENCLOSURE FOR 2FDW-372 AB 809 D 2 FDW PL 0374 REMOTE STARTER ENCLOSURE FOR 2FDW-374 AB 809 D 2 FDW PL 0382 REMOTE STARTER ENCLOSURE FOR 2FDW-382 AB 809 D 2 FDW PL 0384 REMOTE STARTER ENCLOSURE FOR 2FDW-384 AB 809 D 2 FDW PL ATWSCP U2 ATWS CONTROL PANEL AB 838 D 2 FDW PS 0300 2EFPT LOW HYDRAULIC OIL PRESS SWITCH TB 775 C 2 FDW PS 0382 FWPT 2A CONTROL OIL PRESS SWITCH TB 775 D 2 FDW PS 0383 FWPT 2A CONTROL OIL PRESS SWITCH TB 775 D 2 FDW PS 0384 FWPT 2B CONTROL OIL PRESS SWITCH TB 775 D 2 FDW PS 0385 FWPT 2B CONTROL OIL PRESS SWITCH TB 775 D 2 FDW PS 1011 FWP 2A DISCH HDR PRESS SWITCH TB 775 D 2 FDW PS 1012 MAIN FWP 2B DISCH HDR PRESS SWITCH TB 775 D 2 FDW PU 0003 TDEFW PUMP TB 775 D Page 11 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipmnbnt List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 FDW PU 0004 MDEFW PUMP 2A TB 775 D 2 FDW PU 0005 MDEFW PUMP 2B TB 775 D 2 FDW SV 0037 STEAM GEN A SAMPLE ISOL VALVE FOR 2FDW-106 AB 809 D 2 FDW SV 0038 STEAM GEN B SAMPLE ISOL VALVE FOR 2FDW-108 AB 822 D 2 FDW TN 2TBATWS1 ATSW TERM BOX 1 AB 809 D 2 FDW TN 2TBATWS2 ATSW TERM BOX 2 AB 809 D 2 FDW TN 2TBFPT FEEDWATER PUMP TURBINE TERMINAL BOX TB 775 D 2 FDW VA 0086 PRESS REG TD PUMP SEALS TB 775 D 2 FDW VA 0087 PRESS REG TD PUMP SEALS TB 775 D 2 FDW VA 0105 SG 2A SAMPLE ISOLATION RB 808 D 2 FDW VA 0106 SG 2A SAMPLE ISOLATION AB 809 D 2 FDW VA 0107 SG 2B SAMPLE ISOLATION RB 808 D 2 FDW VA 0108 SG 2B SAMPLE ISOLATION AB 809 D 2 FDW VA 0129 PRESS REG TD PUMP SEALS TB 775 D 2 FDW VA 0218 PRESS REG TD PUMP SEALS TB 775 D 2 FDW VA 0315 MDEFW PUMP 2A ISOLATION AB 809 D 2 FDW VA 0316 MDEFW PUMP 2B ISOLATION AB 809 D 2 GEN BS IPB ISOLATED PHASE BUS 19KV TB 796 A, B, C, D, E 2 GWD VA 0012 QUENCH TANK VENT RB 797 A, B, C 2 GWD VA 0013 QUENCH TANK VENT AB 809 A, B, C 2 HP VA 0003 LETDOWN ISOLATION RB 777 B 2 HP VA 0004 LETDOWN ISOLATION RB 777 B 2 HP VA 0005 LETDOWN ISOLATION AB 809 B 2 HP VA 0020 RCP SEAL RETURN ISOLATION RB 808 B 2 HP VA 0021 RCP SEAL RETURN ISOLATION AB 809 B 2 HP VA 0024 BWST SUCTION ISOLATION AB 771 A,B,C 2 HP VA 0025 BWST SUCTION ISOLATION AB 771 A,B,C 2 HP VA 0026 HPI TRAIN 2A INJECTION AB 809 A,B,C 2 HP VA 0027 HPI TRAIN 2B INJECTION AB 809 A,B,C 2 HP VA 0031 RCP SEAL INJ FLOW CONTROL AB 796 B 2 HP VA 0071 SEAL RETURN LINE RELIEF AB 771 B 2 HP VA 0120 RC VOLUME CONTROL AB 809 A,B,C 2 HP VA 0355 HPI AUX SPRAY THROTTLE AB 809 C 2 HP VA 0398 RC MAKEUP PUMP TO RCP SEALS BLOCK RB 777 B 2 HP VA 0409 HPI CROSSOVER ISOLATION AB 809 A,B,C 2 HP VA 0410 HPI CROSSOVER ISOLATION AB 809 A,B,C 2 HP VA 0426 ALT LETDOWN PATH ISOLATION RB 777 A,B 2 HP VA 0428 ALT LETDOWN PATH ISOLATION RB 777 A,B 2 HPI EP 0003 MAKEUP FLOW CONTROL AB 809 A,B,C 2 HPI EP 0075 RCP SEAL INJECTION FLOW AB 783 B 2 HPI FT 0007A HPI A TRAIN INJ FLOW TRANSMITTER AB 758 A,B,C 2 HPI FT 0008A HPI B TRAIN INJ FLOW TRANSMITTER AB 758 A,B,C 2 HPI FT 0075 RCP SEAL INJ FLOW TRANSMITTER AB 783 B 2 HPI FT 0101 RC PUMP SEAL INLET FLOW XMTR (Powered by ICS) AB 783 B Page 12 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1'Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 HPI FT 0102 RC PUMP SEAL INLET FLOW XMTR (Powered by ICS) AB 783 B 2 HPI FT 0103 RC PUMP SEAL INLET FLOW XMTR (Powered by ICS) AB 783 B 2 HPI FT 0104 RC PUMP SEAL INLET FLOW XMTR (Powered by ICS) AB 783 B 2 HPI FT 0157 U2 RC MAKE UP PUMP FLOW RB 777 B 2 HPI FT 0160 2B HPI EMERG FLOW X-OVER AB 809 A,B,C 2 HPI HX OOOA LETDOWN COOLER 2A RB 777 B 2 HPI HX 000B LETDOWN COOLER 2B RB 777 B 2 HPI HX 001A RC SEAL RETURN COOLER 2A AB 771 B 2 HPI HIX 001B RC SEAL RETURN COOLER 2B AB 771 B 2 HPI LT 0033P1 LETDOWN STORAGE TANK LEVEL TRAIN 1 AB 771 B 2 HPI LT 0033P2 LETDOWN STORAGE TANK LEVEL TRAIN 2 AB 771 B 2 HPI PL 0409 REMOTE STARTER ENCLOSURE FOR 2HP-409 AB 796 A,B,C 2 HPI PL 0410 REMOTE STARTER ENCLOSURE FOR 2HP-410 AB 796 A,B,C 2 HPI PS 0357 LETDOWN FLOW TEMP HIGH INTERLOCK AB 783 B 2 HPI PU 0001 HPI PUMP 2A AB 758 A,B,C 2 HPI PU 0002 HPI PUMP 2B AB 758 A,B,C 2 HPI PU 0003 HPI PUMP 2C AB 758 A,B,C 2 HPI PU 0005 SSF RC MAKEUP PUMP RB 777 B 2 HPI SV 0090 CONTROLS LETDOWN ISOLATION VALVE FOR 2HP-5 AB 809 B 2 HPI SV 0095 RC PUMP SEAL RETURN ISOLATION VLV FOR 2HP-21 AB 809 B 2 HPI TK 0001 LETDOWN STORAGE TANK AB 771 B 2 HT TF EP05 FEEDER TO 208V TRACE HEATING PNLBD EP05 AB 771 D 2 ICC CA 0001A UNIT 2 ICCM TRAIN A CABINET AB 822 A, B, C, D, E 2 ICC CA 0001B UNIT 2 ICCM TRAIN B CABINET AB 822 A, B, C, D, E 2 ICS CA 0001 ICS CABINET 1 AB 822 A, B, C, D, E 2 ICS CA 0002 ICS CABINET 2 AB 822 A, B, C, D, E 2 ICS CA 0003 ICS CABINET 3 AB 822 A, B, C, D, E 2 ICS CA 0004 ICS CABINET 4 AB 822 A, B, C, D, E 2 ICS CA 0005 ICS CABINET 5 AB 822 A, B, C, D, E 2 ICS CA 0006 ICS CABINET 6 AB 822 A, B, C, D, E 2 ICS CA 0007 ICS CABINET 7 AB 822 A, B, C, D, E 2 ICS CA 0008 ICS CABINET 8 AB 822 A, B, C, D, E 2 ICS CA 0009 ICS CABINET 9 AB 822 A, B, C, D, E 2 ICS CA 0010 ICS CABINET 10 AB 822 A, B, C, D, E 2 ICS CA 0011 ICS CABINET 11 AB 822 A, B, C, D, E 2 ICS CA 0012 AUXILIARY SYSTEM CABINET #12 AB 822 A, B, C, D, E 2 ICS CA 0013 AUXILIARY SYSTEM CABINET #13 AB 822 A, B, C, D, E 2 ICS CA 0014 AUXILIARY SYSTEM CABINET #14 AB 822 A, B, C, D, E 2 ICS PL ASP AUX SHUTDOWN PANEL TB 822 A, B, C, D, E 2 LP VA 0001 LPI DROPLINE ISOL FROM RCS RB 797 B,D 2 LP VA 0002 LPI DROPLINE ISOL FROM RCS RB 777 D 2 LP VA 0003 LPI HOT LEG SUCTION AB 758 D 2 LP VA 0005 LPI PUMP 2A SUCTION AB 758 D 2 LP VA 0006 LPI SUCTION CROSSOVER AB 758 D Page 13 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Bbse 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 LP VA 0007 LPI SUCTION CROSSOVER AB 758 D 2 LP VA 0008 LPI PUMP 2B SUCTION AB 758 D 2 LP VA 0009 2C LPI PUMP DISCH TO 2A LPI HDR AB 758 D 2 LP VA 0010 2C LPI PUMP DISCH TO 2B LPI HDR AB 758 D 2 LP VA 0012 LPI COOLER 2A ISOLATION AB 771 D 2 LP VA 0014 LPI COOLER 2B ISOLATION AB 771 D 2 LP VA 0017 LPI TRAIN 2A INJECTION ISOL AB 809 D 2 LP VA 0018 LPI TRAIN 2B INJECTION ISOL AB 809 D 2 LP VA 0069 LPI SWITCHOVER FLOW CONTROL VALVE AB 758 D 2 LP VA 0126 LPI POST ACCIDENT SAMPLE ISOL AB 758 A 2 LPI FT 0004P LPI TRAIN 2B INJ FLOW TRANS (Powered by ICCM) AB 809 D 2 LPI FT 0005P LPI TRAIN 2A INJ FLOW TRANS (Powered by ICCM) AB 809 D 2 LPI HX OOOA LPI COOLER 2A AB 771 D 2 LPI HX 000B LPI COOLER 2B AB 771 D 2 LPI PU 0001 2LPI PUMPA AB 758 D 2 LPI PU 0002 2LPI PUMP B AB 758 D 2 LPI PU 0003 2LPI PUMP C AB 758 D 2 LPI TE 0209 LPI COOLER 2B OUTLET TEMP (ICS Input) AB 809 D 2 LPI TE 0210 LPI COOLER 2A OUTLET TEMP (ICS Input) AB 771 D 2 LPI TK 0001 BWST YD 796 A,B,C 2 LPS FT 0124 LPI COOLER 2A FLOW XMTR (2LPSW-251) AB 771 D 2 LPS FT 0125 LPI COOLER 2B FLOW XMTR (2LPSW-252) AB 771 D 2 LPS FT 1000 DECAY HEAT COOLER 'A' LPSW FLOW (2LPSW-251) AB 771 B,D 2 LPS FT 1001 DECAY HEAT COOLER B LPSW FLOW AB 771 B,D 2 LPS SV 0202 MOTOR DRIVEN EFDW PUMP MTR 2A COOLING WATER FLOW TB 775 C 2 LPS SV 0203 MOTOR DRIVEN EFDW PUMP MTR 2B COOLING WATER FLOW TB 775 C 2 LPS SV 1000 SOLENOID VALVE FOR 2LPSW-251 AB 783 D 2 LPS SV 1001 SOLENOID VALVE FOR 2LPSW-252 AB 783 D 2 LPS VA 0004 LPI COOLER 2A ISOLATION VALVE AB 783 D 2 LPS VA 0005 LPI COOLER 2B ISOLATION VALVE AB 783 D 2 LPS VA 0018 RBCU 2A RETURN VALVE AB 809 E 2 LPS VA 0021 RBCU 2B RETURN VALVE AB 809 E 2 LPS VA 0024 RBCU 2C RETURN VALVE AB 809 E 2 LPS VA 0139 Nonessential Header Isolation Valve TB 775 D 2 LPS VA 0251 LPI COOLER 2A CONTROL VALVE AB 783 D 2 LPS VA 0252 LPI COOLER 2B CONTROL VALVE AB 783 D 2 LPS VA 0516 EFW PUMP 2A LPSW ISOLATION VALVE TB 775 C 2 LPS VA 0525 EFW PUMP 2B LPSW ISOLATION VALVE TB 775 C 2 MS PL 0017 REMOTE STARTER ENCLOSURE FOR 2MSRS0017 TB 796 D 2 MS PL 0026 REMOTE STARTER ENCLOSURE FOR 2MSRS0026 TB 796 D 2 MS PL 0076 REMOTE STARTER ENCLOSURE FOR 2MSRS0076 TB 796 D 2 MS PL 0079 REMOTE STARTER ENCLOSURE FOR 2MSRS0079 TB 796 D 2 MS PS 0086 MAIN STEAM PRESS SWITCH (MS-19) TB 796 D 2 MS PS 0087 MAIN STEAM PRESS SWITCH (MS-22) TB 796 D Page 14 of 23

Attachment 1 Oconee Unit 2, SW'EL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 MS PS 0088 MAIN STEAM PRESS SWITCH (MS-28) TB 796 D 2 MS PS 0089 MAIN STEAM PRESS SWITCH (MS-31) TB 796 D 2 MS PT 0024P SG 2A PRESSURE RB 825 D 2 MS PT 0025P SG 2A PRESSURE RB 825 D 2 MS PT 0026P SG 2B PRESSURE RB 825 D 2 MS PT 0027P SG 2B PRESSURE RB 825 D 2 MS PT 1006 AFIS ANALOG CHANNEL 3 - 2A S/G HDR PRESSURE TB 796 D 2 MS PT 1007 AFIS ANALOG CHANNEL 3- 2B S/G HDR PRESSURE TB 796 D 2 MS PT 1008 AFIS ANALOG CHANNEL 4 - 2A S/G HDR PRESSURE TB 796 D 2 MS PT 1009 AFIS ANALOG CHANNEL 4 - 2B S/G HDR PRESSURE TB 796 D 2 MS PY' 0042 UNIT 2 UPS (2MSSS0042 - 2MS-87) AB 796 D 2 MS SV 0074 TD EFDWP STEAM ADMISSION SOLENIOD FOR 2MS-93 TB 775 D 2 MS SV 0178 TURB BYPASS CONTROL VLV A SHUTOFF TB 796 D 2 MS SV 0179 TURB BYPASS CONTROL VLV B SHUTOFF TB 796 D 2 MS SV 0180 TURB BYPASS CONTROL VLV C SHUTOFF TB 796 D 2 MS SV 0181 TURB BYPASS CONTROL VLV D SHUTOFF TB 796 D 2 MS VA 0001 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0002 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0003 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0004 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0005 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0006 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0007 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0008 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0009 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0010 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0011 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0012 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0013 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0014 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0015 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0016 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0017 TURBINE BYPASS ISOLATION TB 796 D 2 MS VA 0019 TURBINE BYPASS VALVE TB 796 D 2 MS VA 0022 TURBINE BYPASS VALVE TB 796 D 2 MS VA 0024 AS ISOLATION TB 796 D 2 MS VA 0026 TURBINE BYPASS ISOLATION TB 796 D 2 MS VA 0028 TURBINE BYPASS VALVE TB 796 D 2 MS VA 0031 TURBINE BYPASS VALVE TB 796 D 2 MS VA 0033 AS ISOLATION TB 796 D 2 MS VA 0035 FWPT ISOLATION TB 796 D 2 MS VA 0036 FWPT ISOLATION TB 796 D 2 MS VA 0040 FWPT 2A STOP VALVE (MS-40/SV12) TB 775 D 2 MS VA 0043 FWPT 2B STOP VALVE (MS-43/SV12) TB 775 D Page 15 of 23

Attachment 1 Oconee' unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 MS VA 0047 MS TO CSAE TB 796 D 2 MS VA 0076 MS RH ISOLATION TB 796 D 2 MS VA 0077 MS TO 2ND STAGE RHTR ISOL TB 796 D 2 MS VA 0078 MSTO 2ND STAGE RHTR ISOL TB 796 D 2 MS VA 0079 MS RH ISOLATION TB 796 D 2 MS VA 0080 MS TO 2ND STAGE RHTR ISOL TB 796 D 2 MS VA 0081 MS TO 2ND STAGE RHTR ISOL TB 796 D 2 MS VA 0093 TDEFW MS ISOLATION VALVE TB 775 D 2 MS VA 0095 TD EFDWP GOVERNOR VALVE TB 775 D 2 MS VA 0102 TURBINE STOP VALVE # 4 TB 796 D 2 MS VA 0103 TURBINE STOP VALVE # 3 TB 796 D 2 MS VA 0104 TURBINE STOP VALVE # 2 TB 796 D 2 MS VA 0105 TURBINE STOP VALVE # 1 TB 796 D 2 MS VA 0106 MAIN STEAM CONTROL VALVE TB 796 D 2 MS VA 0107 MAIN STEAM CONTROL VALVE TB 796 D 2 MS VA 0108 MAIN STEAM CONTROL VALVE TB 796 D 2 MS VA 0109 MAIN STEAM CONTROL VALVE TB 796 D 2 MS VA 0112 MS TO 2ND STAGE RHTR ISOL TB 796 D 2 MS VA 0126 MS TO AS CONTROL VALVE TB 796 D 2 MS VA 0129 MS TO AS CONTROL VALVE TB 796 D 2 MS VA 0173 MS TO 2ND STAGE RHTR ISOL TB 796 D 2 N TK 0003 NITROGEN SUPPLY FOR 2FDW-315 & 2FDW-316 AB 838 D 2 N TK 0004 NITROGEN SUPPLY FOR 2FDW-315 & 2FDW-316 AB 838 D 2 N TK 0005 NITROGEN SUPPLY FOR 2MS-87 TB 796 D 2 N TK 0006 NITROGEN SUPPLY FOR 2MS-126 TB 796 D 2 N TK 0007 NITROGEN SUPPLY FOR 2MS-129 TB 796 D 2 PAM CA 0001 POST ACCIDENT LIQUID SAMPLING PANEL AB 771 A 2 PAM LT 0090 RB CONTAINMENT WATER LVL TR A RB 777 A 2 PAM LT 0091 RB CONTAINMENT WATER LVL TR B RB 777 A 2 PAM P 0305 RB CONT WATER LVL IND TR B AB 822 A 2 PPS CA 0001 RPS A/ES Al AB 822 A, B, C, D, E 2 PPS CA 0002 RPS A/ES Al AB 822 A,B, C, D, E 2 PPS CA 0003 RPS B/ES BI AB 822 A, B, C, D, E 2 PPS CA 0004 RPS B/ES BI AB 822 A, B, C, D, E 2 PPS CA 0005 RPS C/ES C1 AB 822 A, B, C, D, E 2 PPS CA 0006 RPS C/ES Cl AB 822 A, B, C, D, E 2 PPS CA 0007 RPS D AB 822 A, B, C, D, E 2 PPS CA 0008 RPS D AB 822 A, B, C, D, E 2 PPS CA 0009 ES A2 AB 822 A, B, C, D, E 2 PPS CA 0010 ES B2 AB 822 A, B, C, D, E 2 PPS CA 0011 ES C2 AB 822 A, B, C, D, E 2 PPS CA 0012 ES VOTER ODD AB 822 A, B, C, D, E 2 PPS CA 0013 ES VOTER ODD AB 822 A, B, C, D, E 2 PPS CA 0014 ES VOTER EVEN AB 822 A, B, C, D, E Page 16 of 23

Attachment 1 Oc-hee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 PPS CA 0015 ES VOTER EVEN AB 822 A,B,C, D,E 2 PPS CA 0016 RPS E/MSI AB 822 A, B,C, D,E 2 PPS CA 0017 ES STATUS ODD AB 822 A,B,C,D,E 2 PPS CA 0018 ES STATUS EVEN AB 822 A, B,C, D,E 2 RBC AH 0020A RBCU FAN 2A RB 825 E 2 RBC AH 0020B RBCU FAN 2B RB 825 E 2 RBC AH 0020C RBCU FAN 2C RB 825 E 2 RBC HX 000A RB COOLING UNIT 2A RB 817 E 2 RBC HX OOOAAUX AUX RBCU A RB 844 E 2 RBC HX 000B RB COOLING UNIT 2B RB 817 E 2 RBC HX OOOBAUX AUX RBCU B RB 861 E 2 RBC HX O0OC RB COOLING UNIT 2C RB 817 E 2 RBC HX OOCAUX AUX RBCU C RB 844 E 2 RBC HX O0ODAUX AUX RBCU D RB 844 E 2 RC LT 0004P1 PRZ LEVEL TRANSMITTER RB 797 B,C' 2 RC LT 0004P3 PRZ LEVEL TRANSMITTER RB 797 B,C 2 RC LT 0123 2A RCS HOT LEG LVL (ICCM A) AB 809 B 2 RC LT 0124 2B RCS HOT LEG LVL (ICCM B) AB 809 B 2 RC LT 0125 RV HEAD LEVEL (ICCM A) AB 809 B 2 RC LT 0126 RV HEAD LEVEL (ICCM B) AB 809 B 2 RC PL 2RC1 2RC-1 SPRAY VALVE CONTROL BOX AB 796 B 2 RC PT 0017P RCS LOOP A PRESS TRANS RB 825 C 2 RC PT 0021P RC PRESS XMTR (ES CH A) RB 825 B 2 RC PT 0022P RC PRESS XMTR (ES CH B) RB 825 B 2 RC PT 0023P RC PRESS XMTR (ES CH C) RB 825 B 2 RC PT 0166P RCS LOOP B PRESS TRANS RB 825 C 2 RC PT 0225 U2 RC LOOP A PRESSURE RB 817 C,D 2 RC PT 0226 U2 RC LOOP B PRESSURE RB 825 C,D 2 RC PT 0244 WR RCS PRESS TRAIN A (ICCM) AB 809 C,D 2 RC PT 0245 WR RCS PRESS TRAIN B (ICCM) AB 809 C,D 2 RC RD 0005B A2 COLD LEG RTD RB 797 C,D 2 RC RD 0006A Al COLD LEG RTD RB 797 C,D 2 RC RD 0007B 82 COLD LEG RTD RB 797 C,D 2 RC RD 0008A BI COLD LEG RTD RB 797 C,D 2 RC RD 0043A PRZ RTD RB 808 B,C 2 RC RD 0043B PRZ RTD RB 808 B,C 2 RC RD 0084A REACTOR OUTLET LOOP 2A RB 844 C,D 2 RC RD 0084B A HOT LEG WIDE RANGE RTD RB 844 C,D 2 RC RD 0085A REACTOR OUTLET LOOP 2B RB 844 C,D 2 RC RD 0085B B HOT LEG WIDE RANGE RTD RB 844 C,D 2 RC SV 0036 RC SAMPLE LINE ISOLATION VALVE (2RC7) AB 822 B 2 RC SV 0229 CONTROLS POST ACC. SAM. VLV(2RC-179) AB 758 A 2 RC VA 0001 PRESSURIZER SPRAY VALVE RB 853 C 2 RC VA 0003 PRZ SPRAY ISOLATION RB 853 C Page 17 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 RC VA 0004 PRZ PORV BLOCK VALVE RB 853 B,C 2 RC VA 0005 PRZ STEAM SAMPLE ISOLATION RB 808 B 2 RC VA 0006 PRZ WATER SAMPLE ISOLATION RB 808 B 2 RC VA 0007 PRZ WATER SAMPLE ISOLATION AB 809 B 2 RC VA 0066 PRZ PORV RB 853 B,C 2 RC VA 0067 PRZ CODE SAFETY RB 853 B,C 2 RC VA 0068 PRZ CODE SAFETY RB 853 B,C 2 RC VA 0159 RV VENT ISOLATION RB 844 A,B,C 2 RC VA 0160 RV VENT ISOLATION RB 844 A,B,C 2 RC VA 0162 POST ACC SAMPLE PATH ISOL RB 777 A,B 2 RC VA 0163 POST ACC SAMPLE PATH ISOL RB 777 A 2 RC VA 0164 POST ACC SAMPLE PATH ISOL AB 758 A 2 RC VA 0165 POST ACC SAMPLE PATH ISOL AB 758 A 2 RC VA 0179 POST ACC SAMPLE THROTTLE AB 758 A 2 RPS CA 0001 REACTOR PROTECTION SYSTEM CABINETS U2 AB 822 A, B, C, D, E 2 RPS CA Al RPS CABINET 2A1 AB 822 A, B, C, D, E 2 RPS CA A2 RPS CABINET 2A2 AB 822 A, B, C, D, E 2 RPS CA B1 RPS CABINET 2B1 AB 822 A, B, C, D, E 2 RPS CA B2 RPS CABINET 2B2 AB 822 A, B, C, D, E 2 RPS CA C1 RPS CABINET 2C1 AB 822 A, B, C, D, E 2 RPS CA C2 RPS CABINET 2C2 AB 822 A, B, C, D, E 2 RPS CA D1 RPS CABINET 2D1 AB 822 A, B, C, D, E 2 RPS CA D2 RPS CABINET 2D2 AB 822 A, B, C, D, E 2 RPS CA El RPS CABINET 2E1 AB 822 A, B, C, D, E 2 SC HX OOOA GEN WATER COOLER 2A TB 775 D 2 SC HX 000B GEN WATER COOLER 2B TB 775 D 2 SF TK 0002 INCORE INST HANDLING TANK RB 797 A,C,D 2 SF VA 0082 SPENT FUEL POOL TO RC MAKEUP PUMP BLOCK RB 777 B 2 SF VA 0097 SPENT FUEL POOL TO RC MAKEUP PUMP BLOCK RB 777 B 2 SSW FT 1011 ESV PUMP 2A SEAL WATER FLOW TRANSMITTER ESV 797 D 2 SSW FT 1012 ESV PUMP 2B SEAL WATER FLOW TRANSMITTER ESV 797 D 2 SSW FT 1013 ESV PUMP 2C SEAL WATER FLOW TRANSMITTER ESV 797 D 2 SSW VA 0109 CCWP Seal Water Reg. Valve INT 796 D 2 SSW VA 0119 CCWP Seal Water Reg. Valve INT 796 D 2 SSW VA 0129 CCWP Seal Water Reg. Valve INT 796 D 2 SSW VA 0139 CCWP Seal Water Reg. Valve INT 796 D 2 SSW VA 0155 ESV Pump Seal Supply Valve ESV 797 D 2 SSW VA 0156 ESV Pump Seal Supply Valve ESV 797 D 2 SSW VA 0157 ESV Pump Seal Supply Valve ESV 797 D 2 SYD BK PCB24 230KV AC POWER CIRCUIT BREAKER 24 (PCB-24) SYD 770 A, B, C, D, E 2 SYD BK PCB26 230KV AC POWER CIRCUIT BREAKER 26 (PCB-26) SYD 770 A, B, C, D, E 2 SYD BK PCB27 230KV AC POWER CIRCUIT BREAKER 27 (PCB-27) SYD 770 A, B, C, D, E 2 TO PU 0022 EFWPT AUX OIL PUMP TB 775 C 2 TO TK 0002 EFW PUMP TURBINE OIL TANK TB 775 C Page 18 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 TO TN TBEH2A FWPT2A MAIN OILTANK TERM BOX EH TB 775 D 2 TO TN TBEH2B FWPT 2B MAIN OIL TANK TERM BOX EH TB 775 D 2 TO VA 0059 EFW PUMP TURB OIL PR VALVE TB 775 C 2 TO VA 0145 2MS-95 LUBE OIL SUPPLY SOLENOID TB 775 C 2 V AE 0001 EM STEAM AIR EJECTOR (SAE) TB 775 D KO ELK BD CB05 CONTROL BOARD 05 KEO 688 A, B, C, D, E KO ELK BD CB06 CONTROL BOARD 06 KEO 688 A, B, C, D, E KO ELK BS OHXPHASE KHU OVERHEAD BUS X PHASE TO 230 KV SWITCHYARD KEO 702 A, B, C, D, E KO ELK BS OHYPHASE KHU OVERHEAD BUS Y PHASE TO 230 KV SWITCHYARD KEO 702 A, B, C, D, E KO ELK BS OHZPHASE KHU OVERHEAD BUS Z PHASE TO 230 KV SWITCHYARD KEO 702 A, B, C, D, E KO ELK PL EB5 ELEC BOARD 05 KEO 688 A, B, C, D, E KO ELK PL EB6 ELEC BOARD 06 KEO 688 A, B, C, D, E KO ELK SX CX KEOWEE XFMR CX DISC SW KEO 702 A, B, C, D, E KO ELK TF 0001 MAIN TRANSFORMER KEO 702 A, B, C, D, E KO ELK TF CX TRANSFORMER CX KEO 702 A, B, C, D, E K1 AG TK 0001 AIR RECEIVER TANK KEO 683 A, B, C, D, E K1 CO PS 063F GEN 1 C02 RELEASE PRESS SWITCH (63F/PS2_1 KEO 683 A, B, C, D, E K1 CO SV 20F1 GEN 1 C02 RELEASE VALVE KEO 683 A, B, C, D, E K1 CO SV 20F2 GEN 1 C02 RELEASE VALVE KEO 683 A, B, C, D, E K1 CO SV 20P1 GEN 1 C02 CYL RELEASE VALVE (MAIN BANK) KEO 702 A, B, C, D, E K1 CO SV .20P2 GEN 1 C02 CYL RELEASE VALVE (MAIN BANK) KEO 702 A, B, C, D, E KI ELK BA KB1 BATT BANK 1 KEO 675 A, B, C, D, E KI ELK BC KC1 BATT CHARGER 1 (KC-1) KEO 675 A, B, C, D, E K1 ELK BD CB01 CONTROL BOARD 01 KEO 688 A, B, C, D, E K1 ELK BD CB02 CONTROL BOARD 02 KEO 688 A, B, C, D, E K1 ELK BD CB03 CONTROL BOARD 03 KEO 688 A, B, C, D, E K1 ELK BD CB04 CONTROL BOARD 04 KEO 688 A, B, C, D, E KI ELK BS GENACB13 13.8 KV BUS FROM GEN #1 TO ACB1 AND ACB3 KEO 702 A, B, C, D, E K1 ELK BS MTFACB1 13.8 KV BUS FROM ACB1 TO MAIN XFMR KEO 702 A, B, C, D, E K1 ELK CA 0103 TERMINAL BOX 103 (WIRING ONLY) KEO 675 A, B, C, D, E KI ELK CA 0127 TERMINAL BOX 127 KEO 683 A, B, C, D, E K1 ELK CA 1LC1 LOGIC CABINET 1 KEO 688 A, B, C, D, E K1 ELK CA 1LC2 LOGIC CABINET 2 KEO 688 A, B, C, D, E K1 ELK CA 1LC3 LOGIC CABINET 3 KEO 688 A, B, C, D, E K1 ELK CA 1MTC1 Ul MISC TERM CAB 1MTC1 KEO 675 A, B, C, D, E KI ELK CA 1MTC2 Ul MISC TERM CAB 1MTC2 KEO 675 A, B, C, D, E K1 ELK MX 1XA 600V AC MCC 1XA KEO 683 A, B, C, D, E KI ELK PL IDA 125V DC DIST CENTER IDA KEO 675 A, B, C, D, E K1 ELK PL 1ECI EXC CUBICLE 1 KEO 702 A, B, C, D, E KI ELK PL 1EC2 EXC CUBICLE 2 KEO 702 A, B, C, D, E K1 ELK PL 1EC3 EXC CUBICLE 3 KEO 702 A, B, C, D, E KI ELK PL 1EC4 EXC CUBICLE 4 KEO 702 A, B, C, D, E K1 ELK PL 1EC5 EXC CUBICLE 5 KEO 702 A, B, C, D, E K1 ELK PL 1TGP1 TURBINE GAUGE PANEL (UNIT 1) KEO 683 A, B, C, D, E Page 19 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function K1 ELK PL EB1 ELEC BOARD 01 KEO 688 A, B, C, D, E K1 ELK PL EB2 ELEC BOARD 02 KEO 688 A, B, C, D, E K1 ELK PL EB3 ELEC BOARD 03 KEO 688 A, B, C, D, E KI ELK PL EB4 ELEC BOARD 04 KEO 688 A, B, C, D, E K1 ELK PL EFBP1 EMERGENCY FEEDER BREAKER NO. 1 KEO 702 A, B, C, D, E K1 ELK PL GBP GENERATOR BREAKER PANEL KEO 702 A, B, C, D, E K1 ELK PL KA 120V AC PPB KA KEO 683 A, B, C, D, E K1 ELK PL MODP MOTOR OPERATED DISCONNECT PANEL KEO 702 A, B, C, D, E KI ELK SH 1X 600V AC SWGR lX KEO 702 A, B, C, D, E K1 ELK SX 1E Ul XFMR 1E DISC SW KEO 702 A, B, C, D, E K1 ELK SX ix TRANSFORMER 1X DISCONNECT SWITCH KEO 702 A, B, C, D, E KI ELK TF 1E EXCITATION TRANSFORMER 1E KEO 702 A, B, C, D, E K1 ELK TF lx 600V AC SWGR IX TRANSFORMER KEO 702 A, B, C, D, E K1 ELK TN 0101 TERMINAL BOX 101 KEO 683 A, B, C, D, E K1 ELK TN 0102 TERMINAL BOX 102 KEO 683 A, B, C, D, E Ki ELK TN 0109 TERMINAL BOX 109 KEO 683 A, B, C, D, E K1 ELK TN 0113 TERMINAL BOX 113 (WIRING ONLY) KEO 683 A, B, C, D, E KI ELK TN 0121 TERMINAL BOX 121 (WIRING ONLY) KEO 683 A, B, C, D, E K1 ELK TN 0123 TERMINAL BOX 123 (WIRING ONLY) KEO 683 A, B, C, D, E K1 GA HX 0001 GEN AIR COOLER 1 KEO 695 A, B, C, D, E K1 GA HX 0002 GEN AIR COOLER 2 KEO 695 A, B, C, D, E K1 GA HX 0003 GEN AIR COOLER 3 KEO 695 A, B, C, D, E K1 GA HX 0004 GEN AIR COOLER 4 KEO 695 A, B, C, D, E K1 GA HX 0005 GEN AIR COOLER 5 KEO 695 A, B, C, D, E K1 GA HX 0006 GEN AIR COOLER 6 KEO 695 A, B, C, D, E K1 GBO HX 0001 TURB GUIDE BRNG OIL COOLER KEO 667 A, B, C, D, E K1 GBO LS 63TA TURB GUIDE BRNG OIL LEVEL SWITCH (1GBOLTO001) KEO 675 A, B, C, D, E K1 GBO LS 63TB TURB GUIDE BRNG OIL LEVEL SWITCH (1GBOLTO002) KEO 675 A, B, C, D, E K1 GBO PU 088A AC BRNG OIL PUMP (88A) KEO 667 A, B,C,D,E K1 GBO PU 088D DC BRNG OIL PUMP (88D) KEO 667 A, B, C, D, E Ki GCS CA SS1A GOVERNOR SPEED CONTOL CABINET SSIA KEO 667 A, B, C, D, E K1 GCS CA SSlB GOVERNOR SPEED CONTOL CABINET SSIB KEO 667 A, B, C, D, E K1 GEN GN 0001 KEOWEE UNIT 1 GENERATOR KEO 683 A, B, C, D, E KI GEN PC GPC1 GEN POT CUBICLE UNIT 1 (1 PER PHASE) KEO 702 A, B, C, D, E K1 GEN PL BPC1 BUS POT CUBICLE UNIT 1 (1 PER PHASE) KEO 702 A, B, C, D, E K1 GEN PL NEUCUB NEUTRAL CUBICLE 1 KEO 683 A, B, C, D, E KI HPO HX 0001 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0002 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E KI HPO HX 0003 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E KI HPO HX 0004 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E KI HPO HX 0005 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E KI HPO HX 0006 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0007 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0008 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E Page 20 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function K1 HPO LS 63BLH LEVEL SWITCH (1HPOLS0001) KEO 683 A, B, C, D, E K1 HPO LS 63BLL LEVEL SWITCH (1HPOLS0002) KEO 683 A, B, C, D, E K1 HPO PU 88HA AC GEN HP LIFT PUMP (88HA) KEO 675 A, B, C, D, E K1 HPO PU 88HD DC GEN HP LIFT PUMP (88HD) KEO 675 A, B, C, D, E KI MT PS 0009 TURBINE PIT PRESS SWITCH KEO 675 A, B, C, D, E KI MT TR 0001 KEOWEE UNIT 1 TURBINE KEO 702 A, B, C, D, E K1 OG TK 0001 GOVERNOR ACTUATOR KEO 683 A, B, C, D, E K1 OG TK 0002 GOVERNOR OIL SUMP TANK KEO 683 A, B, C, D, E K1 OG TK 0003 GOVERNOR OIL PRESS TANK KEO 683 A, B, C, D, E Ki PMG DT MPU1A SPEED CONTROL MAGNETIC PICKUP 1A KEO 667 A, B, C, D, E KI PMG DT MPU1B SPEED CONTROL MAGNETIC PICKUP 1B KEO 667 A, B, C, D, E KI PMG DT MPU1C SPEED CONTROL MAGNETIC PICKUP 1C KEO 667 A, B, C, D, E K1 TS LS 63SA TURB SUMP LEVEL SWITCH (ITSLSO001) KEO 675 A, B, C, D, E Ki TS LS 63SB TURB SUMP LEVEL SWITCH (1TSLS0002) KEO 675 A, B, C, D, E K1 TS PU 88SA AC SUMP PUMP (88SA) KEO 675 A, B, C, D, E KI TS PU 88SD DC SUMP PUMP (88SD) KEO 675 A, B, C, D, E KI WL VA 0011 GEN COOL ISOL VALVE (1WL-11) KEO 683 A, B, C, D, E K2 AG TK 0001 AIR RECEIVER TANK KEO 683 A, B, C, D, E K2 CO PS 063F GEN 2 C02 RELEASE PRESS SWITCH (63F/PS2_2) KEO 683 A, B, C, D, E K2 CO SV 20F3 GEN 2 C02 RELEASE VALVE KEO 683 A, B, C, D, E K2 CO SV 20F4 GEN 2 C02 RELEASE VALVE KEO 683 A, B, C, D, E K2 CO SV 20P3 GEN 2 C02 CYL RELEASE VALVE (RESERVE BANK) KEO 702 A, B, C, D, E K2 CO SV 20P4 GEN 2 C02 CYL RELEASE VALVE (RESERVE BANK) KEO 702 A, B, C, D, E K2 ELK BA KB2 BATT BANK 2 KEO 675 A, B, C, D, E K2 ELK BC KC2 BATT CHARGER 2 (KC-2) KEO 675 A, B, C, D, E K2 ELK BD CB07 CONTROL BOARD 07 KEO 688 A, B, C, D, E K2 ELK BD CB08 CONTROL BOARD 08 KEO 688 A, B, C, D, E K2 ELK BD CB09 CONTROL BOARD 09 KEO 688 A, B, C, D, E K2 ELK BD CB1O CONTROL BOARD 10 KEO 688 A, B, C, D, E K2 ELK BS GENACB24 13.8 KV BUS FROM GEN #2 TO ACB2 AND ACB4 KEO 702 A, B, C, D, E K2 ELK BS MTFACB2 13.8 KV BUS FROM ACB2 TO MAIN XFMR KEO 702 A, B, C, D, E K2 ELK CA 2LCl LOGIC CABINET 1 KEO 688 A, B, C, D, E K2 ELK CA 2LC2 LOGIC CABINET 2 KEO 688 A, B, C, D, E K2 ELK CA 2LC3 LOGIC CABINET 3 KEO 688 A, B, C, D, E K2 ELK CA 2MTC1 U2 MISC TERM CAB 2MTC1 KEO 675 A, B, C, D, E K2 ELK CA 2MTC2 U2 MISC TERM CAB 2MTC2 KEO 675 A, B, C, D, E K2 ELK MX 2XA 600V AC MCC 2XA KEO 683 A, B, C, D, E K2 ELK PL 2DA 125V DC DIST CENTER 2DA KEO 675 A, B, C, D, E K2 ELK PL 2EC1 EXC CUBICLE 1 KEO 702 A, B, C, D, E K2 ELK PL 2EC2 EXC CUBICLE 2 KEO 702 A, B, C, D, E K2 ELK PL 2EC3 EXC CUBICLE 3 KEO 702 A, B, C, D, E K2 ELK PL 2EC4 EXC CUBICLE 4 KEO 702 A, B, C, D, E K2 ELK PL 2EC5 EXC CUBICLE 5 KEO 702 A, B, C, D, E K2 ELK PL 2TGP1 TURBINE GAUGE PANEL (UNIT 2) KEO 683 A, B, C, D, E Page 21 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function K2 ELK PL EB1O ELEC BOARD 10 KEO 688 A, B, C, D, E K2 ELK PL EB7 ELEC BOARD 07 KEO 688 A, B, C, D, E K2 ELK PL EB8 ELEC BOARD 08 KEO 688 A, B, C, D, E K2 ELK PL EB9 ELEC BOARD 09 KEO 688 A, B, C, D, E K2 ELK PL EFBP2 EMERGENCY FEEDER BREAKER NO. 2 KEO 702 A, B, C, D, E K2 ELK PL GBP GENERATOR BREAKER PANEL KEO 702 A, B, C, D, E K2 ELK PL KB 120V AC PPB KB KEO 683 A, B, C, D, E K2 ELK PL MODP MOTOR OPERATED DISCONNECT PANEL KEO 702 A, B, C, D, E K2 ELK SH 2X 600V AC SWGR 2X KEO 702 A, B, C, D, E K2 ELK SX 2E U2 XFMR 2E DISC SW KEO 702 A, B, C, D, E K2 ELK SX 2X TRANSFORMER 2X DISCONNECT SWITCH KEO 702 A, B, C, D, E K2 ELK TF 2E EXCTIATION TRANSFORMER 2E KEO 702 A, B, C, D, E K2 ELK TF 2X 13.8KV/600V AC SWGR 2X TRANSFORMER KEO 702 A, B, C, D, E K2 ELK TN 0201 TERM BOX TB-201 KEO 683 A, B, C, D, E K2 ELK TN 0202 TERM BOX TB-202 KEO 683 A, B, C, D, E K2 ELK TN 0203 TERM BOX TB-203 KEO 675 A, B, C, D, E K2 ELK TN 0227 TERM BOX TB-227 KEO 683 A, B, C, D, E K2 GA HX 0001 GEN AIR COOLER 1 KEO 667 A, B, C, D, E K2 GA HX 0002 GEN AIR COOLER 2 KEO 667 A, B, C, D, E K2 GA HX 0003 GEN AIR COOLER 3 KEO 667 A, B, C, D, E K2 GA HX 0004 GEN AIR COOLER 4 KEO 667 A, B, C, D, E K2 GA HX 0005 GEN AIR COOLER 5 KEO 667 A, B, C, D, E K2 GA HX 0006 GEN AIR COOLER 6 KEO 667 A, B, C, D, E K2 GBO HX 0001 TURB GUIDE BRNG OIL COOLER KEO 667 A, B, C, D, E K2 GBO LS 63TA TURB GUIDE BRNG OIL LEVEL SWITCH (2GBOLT0001) KEO 675 A, B, C, D, E K2 GBO LS 63TB TURB GUIDE BRNG OIL LEVEL SWITCH (2GBOLT0002) KEO 675 A, B, C, D, E K2 GBO PU 088A AC BRNG OIL PUMP (88A) KEO 667 A, B, C, D, E K2 GBO PU 088D DC BRNG OIL PUMP (88D) KEO 667 A, B, C, D, E K2 GCS CA SS2A GOVERNOR SPEED CONTOL CABINET SS2A KEO 667 A, B, C, D, E K2 GCS CA SS2B GOVERNOR SPEED CONTOL CABINET SS2B KEO 667 A, B, C, D, E K2 GEN GN 0001 KEOWEE UNIT 2 GENERATOR KEO 683 A, B, C, D, E K2 GEN PC GPC2 GEN POT CUBICLE UNIT 2 (1 PER PHASE) KEO 702 A, B, C, D, E K2 GEN PL BPC2 BUS POT CUBICLE UNIT 2 (1 PER PHASE) KEO 702 A, B, C, D, E K2 GEN PL NEUCUB NEUTRAL CUBICLE 2 KEO 683 A, B, C, D, E K2 HPO HX 0001 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0002 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0003 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0004 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0005 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0006 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0007 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0008 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO LS 63BLH LEVEL SWITCH (2HPOLSO001) KEO 683 A, B, C, D, E K2 HPO LS 63BLL LEVEL SWITCH (2HPOLSO002) KEO 683 A, B, C, D, E Page 22 of 23

Attachment 1 Oconee Unit 2, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function K2 HPO PU 88HA AC GEN HP LIFT PUMP (88HA) KEO 675 A, B, C, D, E K2 HPO PU 88HD DC GEN HP LIFT PUMP (88HD) KEO 675 A, B, C, D, E K2 MT PS 0009 TURB PIT PRESS SWITCH KEO 675 A, B, C, D, E K2 MT TR 0001 KEOWEE UNIT 2 TURBINE KEO 683 A, B, C, D, E K2 OG TK 0001 GOVERNOR ACTUATOR KEO 683 A, B, C, D, E K2 OG TK 0002 GOVERNOR OIL SUMP TANK KEO 683 A, B, C, D, E K2 OG TK 0003 GOVERNOR OIL PRESS TANK KEO 683 A, B, C, D, E K2 PMG DT MPUIA SPEED CONTROL MAGNETIC PICKUP 1A KEO 667 A, B, C, D, E K2 PMG DT MPUIB SPEED CONTROL MAGNETIC PICKUP lB KEO 667 A, B, C, D, E K2 PMG DT MPU1C SPEED CONTROL MAGNETIC PICKUP 1C KEO 667 A, B, C, D, E K2 TS LS 63SA TURB SUMP LEVEL SWITCH (2TSLSO001) KEO 675 A, B, C, D, E K2 TS LS 63SB TURB SUMP LEVEL SWITCH (2TSLS0002) KEO 675 A, B, C, D, E K2 TS PU 88SA AC SUMP PUMP (88SA) KEO 675 A, B, C, D, E K2 TS PU 88SD DC SUMP PUMP (88SD) KEO 675 A, B, C, D, E K2 WL VA 0011 GEN COOL ISOL VALVE (2WL-11) KEO 683 A, B, C, D, E Page 23 of 23

Attachment 2 Oconee Unit 2, SWEL-1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 0 DA TK 000C DIESEL STARTING AIR TANK C SSF 777 B,C 0 EL CA SYTC1 SWYD TERMINAL CABINET 01 SYD 770 A, B, C, D, E 0 EL SH BiTOS SK1 CT4 TO STDBY BUS 1 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL TF OCT4 XFMR CT-4 BH3 796 A, B, C, D, E 0 FO TK 0003 SSF DIESEL OIL DAY TANK SSF 777 B,C 0 SSF BA DCSF DCSF SSF NORMAL BATTERY SSF 777 A, B, C, D, E 0 SSF MX XSF MCC XSF(600V) SSF 777 A, B, C, D, E 0 SSF SH OTS1 OTS1 SSF ESSENTIAL SWGR 4160V SSF 777 A, B, C, D, E 0 SYD BC SY2 230KV SWYD BATTERY CHARGER SY2 SYD 770 A, B, C, D, E 0 SYD BD RB02 SWITCHYARD RELAY BOARD RB02 SYD 770 A, B, C, D, E 0 SYD BD RF17 SWITCHYARD RELAY BOARD RF17 SYD 770 A, B, C, D, E 0 SYD BD SRF17 SWITCHYARD RELAY BOARD SRF17 SYD 770 A, B, C, D, E 0 SYD BK PCB08 230KV AC POWER CIRCUIT BREAKER 08 (PCB-08) SYD 770 A, B, C, D, E 0 SYD PL DYC DC PANELBOARD C SYD 770 A, B, C, D, E 0 SYD PL DYE DC PANELBOARD E SYD 770 A, B, C, D, E 0 SYD PL SYDC1 SWITCHYARD DISTRIBUTION CENTER 1 SYD 770 A, B, C, D, E 0 SYD TF RBPT RED BUS POTENTIAL TRANSFORMER (EGPS) SYD 770 A, B, C, D, E 0 VS AH 0042 AHU 0-42 HEATING AND A/C SSF BUILDING SSF 817 B,C 0 VS AH 0044EX6 SSF ON LINE EXHAUST FAN & MOTOR SSF 817 B,C 0 VS DA CD01 SSF CONSTANT VENTILATION (VS-AH-0044EX1) EXHAUST FAN DAMPER SSF 817 B,C 0 VS PS SSFPS03 SSF ON-LINE VENTILATION SYSTEM SUPPLY FAN SSF 822 A, B, C, D, E 0 VS TT SSFCT2 HVAC TEMPERATURE CONTROLLER (FOR SSF-CP-1) SSF 822 A, B, C, D, E 2 BAG BD 2AB1 CONTROL BOARD 2AB1 AB 822 A, B, C, D, E 2 BAG BD 2UB1 CONTROL BOARD 2UB1 AB 822 A, B, C, D, E 2 BS PS 0021 RB PRESS HI (ES CH 8) TRAIN B AB 809 E 2 BS VA 0001 RB SPRAY HEADER 2A ISOLATION AB 809 E 2 C DM 000B POLISHING DEMINERALIZER 2B TB 775 D 2 C LT 0015A UST 2B LEVEL TB 838 D 2 C PS 0036 UST MAKEUP LEVEL CONTROL (PS-36) TB 838 D 2 C PU 0020 HOLDING PUMP 2B TB 775 D 2 C TK 000C UPPER SURGE TANK DOME TB 838 D 2 C VA 0192 HOTWELL NORMAL MAKEUP CONTROL TB 775 D 2 CF TK OOOA CORE FLOOD TANK 2A RB 797 B, D 2 CRD CA CC1 DCRDCS CONTROL CABINET CC-1 AB 809 A 2 CRD CA CC6 DCRDCS CONTROL CABINET CC-6 AB 809 A 2 EHC CA EHC1 EHCCAB2EHC1 AB 809 D 2 EL BA 2CA CONTROL BATT 2CA AB 809 A, B, C, D, E 2 EL BA 2PA PWR BATT 2PA TB 796 A, B, C, D, E 2 EL BC 2CA CONTROL BATT CHGR 2CA AB 796 A, B, C, D, E 2 EL BC 2PA PWR BATT CHGR 2PA TB 796 A, B, C, D, E 2 EL BI 2DIA 120V STATIC INV 2DIA AB 796 A, B, C, D, E 2 EL BK 2A 240/120V 2A REGULATOR OUTPUT BKR AB 796 A, B, C, D, E 2 EL CA 2AT3 AREA TERM CAB 2AT3 AB 809 A, B, C, D, E 2 EL CA 2EF6 ELECTRICAL BOARD 2EF6 AB 822 A, B, C, D, E Page 1 of 3

Attachment 2 Oconee Unit 2, SWEL-1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 EL DI 2ADA ISOL DIODE ASSEMBLY 2ADA AB 796 A, B, C, D, E 2 EL IR MC12 INSTRUMENT RACK 2MC-12 TB 796 D 2 EL LX 2X1 600V LC 2X01 TB 796 A, B, C, D, E 2 EL LX 2X2 600V LC 2X02 TB 796 A, B, C, D, E 2 EL MX 2XA MCC 2XA TB 796 D 2 EL MX 2XC MCC 2XC TB 775 D 2 EL MX 2XJ 600V MCC 2XJ AB 809 D 2 EL MX 2XL MCC 2XL AB 771 A, B, C 2 EL MX 2XO MCC 2XO AB 796 A, B, C, D, E 2 EL MX 2XSF MCC 2XSF(600V) SSF 817 A, B, C, D, E 2 EL MX 2XSFA MCC 2XSF(208V) SSF 817 A, B, C, D, E 2 EL PL 2DCA 125V DC 2DCA AB 796 A, B, C, D, E 2 EL PL 2EPSLP1 EPSL PANEL 2EPSLP1 AB 809 A, B, C, D, E 2 EL PL 2KESP KEOWEE EM START PANEL AB 809 A, B, C, D, E 2 EL PL 2SKL 120V PPB 2SKL AB 809 A, B, C, D, E 2 EL PL 2SKP 240/120V PPB 2SKP ESV 797 A, B, C, D, E 2 EL PL HBP UNIT 2 HEATER BLANKETING PANEL TB 822 D 2 EL PL MFBMRP MAIN FDR BUS MONITOR RLY PANEL AB 809 A, B, C, D, E 2 EL SH 2TCO1 2TC BUS 1 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 2 EL SH BIT12 BIT INSTRUMENTATION SECTION BH1 796 A, B, C, D, E 2 EL SX 2KUBKUP BACKUP TRANSFER SWITCH 2KU AB 796 A, B, C, D, E 2 EL TF 2B XFMR 2B (600V TO 240V) AB 796 A, B, C, D, E 2 EL TF 2XC XFMR 2XC (600V TO 208V) TB 775 A, B, C, D, E 2 EL TN 1001 TERMINAL BOX TB-1001 TB 796 D 2 ES CA 0003 ENGINEERED SAFEGUARDS ANALOG CABINET 3 (CHANNEL C) AB 822 A, B, C, D, E 2 ES CA 2ESTC2 ESFAS EVEN CH TERM CAB 2ESTC2 AB 809 A, B, C, D, E 2 ES CA 2ESTC3 ESFAS EVEN/ODD TERM CAB 2ESTC3 AB 809 A, B,C, D, E 2 ESV PU 0002 ESV Pump 2B ESV 797 D 2 ESV TF 0001 600/240/120V 2SKM POWER TRANSFORMER ESV 797 D 2 ESV TK 0002 ESV Receiver Tank 2B ESV 797 D 2 FD FT 0130 2B EFW HEADER FLOW AB 783 D 2 FD LT 0066 S/G 2A LEVEL RB 777 D 2 FD PS 1011 FWP 2A DISCH HDR PRESS SWITCH TB 775 D 2 FD VA 0218 PRESS REG TD PUMP SEALS TB 775 D 2 FD VA 0316 MDEFW PUMP 2B ISOLATION AB 809 D 2 HP VA 0031 RCP SEAL INJ FLOW CONTROL AB 796 B 2 HPI FT 0102 RC PUMP SEAL INLET FLOW XMTR (Powered by ICS) AB 783 B 2 HPI FT 0157 U2 RC MAKE UP PUMP FLOW RB 777 B 2 HPI HX OOOA LETDOWN COOLER 2A RB 777 B 2 HPI PL 0409 REMOTE STARTER ENCLOSURE FOR 2HP-409 AB 796 A,B,C 2 HPI PS 0357 LETDOWN FLOW TEMP HIGH INTERLOCK AB 783 B 2 HPI PU 0002 HPI PUMP 2B AB 758 A,B,C 2 HPI PU 0005 SSF RC MAKEUP PUMP RB 777 B 2 ICS CA 0008 ICS CABINET 8 AB 822 A, B, C, D, E Page 2 of 3

Attachment 2 Oconee Unit 2, SWEL-1 Equilpiment List Unit Sys Type Number Description Bldg. FLEL Safety Function 2 LP VA 0003 LPI HOT LEG SUCTION AB 758 D 2 LP VA 0012 LPI COOLER 2A ISOLATION AB 771 D 2 LPI FT 0004P LPI TRAIN 2B INJ FLOW TRANS (Powered by ICCM) AB 809 D 2 LPI PU 0003 2LPI PUMP C AB 758 D 2 LPI TE 0209 LPI COOLER 2B OUTLET TEMP (ICS Input) AB 809 D 2 LPS SV 0203 MOTOR DRIVEN EFDW PUMP MTR 2B COOLING WATER FLOW TB 775 C 2 LPS SV 1000 SOLENOID VALVE FOR 2LPSW-251 AB 783 D 2 LPS VA 0004 LPI COOLER 2A ISOLATION VALVE AB 783 D 2 MS PT 1006 AFIS ANALOG CHANNEL 3 - 2A S/G HDR PRESSURE TB 796 D 2 MS VA 0016 MAIN STEAM SAFETY RELIEF AB 809 D 2 MS VA 0040 FWPT 2A STOP VALVE (MS-40/SV12) TB 775 D 2 MS VA 0093 TDEFW MS ISOLATION VALVE TB 775 D 2 N TK 0004 NITROGEN SUPPLY FOR 2FDW-315 & 2FDW-316 AB 838 D 2 N TK 0005 NITROGEN SUPPLY FOR 2MS-87 TB 796 D 2 RBC HX OOOAAUX AUX RBCU A RB 844 E 2 RC LT 0123 2A RCS HOT LEG LVL (ICCM A) AB 809 B 2 RC PT 0166P RCS LOOP B PRESS TRANS RB 825 C 2 RC PT 0225 U2 RC LOOP A PRESSURE RB 817 C,D 2 RC RD 0043A PRZ RTD RB 808 B,C 2 RC RD 0084A REACTOR OUTLET LOOP 2A RB 844 C,D 2 RC SV 0229 CONTROLS POST ACC. SAM. VLV(2RC-179) AB 758 A 2 RC VA 0005 PRZ STEAM SAMPLE ISOLATION RB 808 B 2 RPS CA A2 RPS CABINET 2A2 AB 822 A, B, C, D, E 2 SSW VA 0139 CCWP Seal Water Reg. Valve INT 796 D 2 SSW VA 0155 ESV Pump Seal Supply Valve ESV 797 D 2 TO PU 0022 EFWPT AUX OIL PUMP TB 775 C KO ELK TF 0001 MAIN TRANSFORMER KEO 702 A, B, C, D, E K1 CO SV 20P2 GEN 1 C02 CYL RELEASE VALVE (MAIN BANK) KEO 702 A, B, C, D, E K1 ELK BA KB1 BATT BANK 1 KEO 675 A, B, C, D, E KI ELK BD CB01 CONTROL BOARD 01 KEO 688 A, B, C, D, E K1 ELK CA 1MTC1 Ul MISC TERM CAB 1MTC1 KEO 675 A, B, C, D, E K1 ELK MX IXA 600V AC MCC 1XA KEO 683 A, B, C, D, E K1 ELK TN 0109 TERMINAL BOX 109 KEO 683 A, B, C, D, E KI OG TK 0003 GOVERNOR OIL PRESS TANK KEO 683 A, B, C, D, E K1 PM DT MPU1A SPEED CONTROL MAGNETIC PICKUP 1A KEO 667 A, B, C, D, E KI WL VA 0011 GEN COOL ISOL VALVE (1WL-11) KEO 683 A, B, C, D, E K2 ELK BC KC2 BATT CHARGER 2 (KC-2) KEO 675 A, B, C, D, E K2 ELK CA 2MTC1 U2 MISC TERM CAB 2MTC1 KEO 675 A, B, C, D, E K2 ELK PL 2DA 125V DC DIST CENTER 2DA KEO 675 A, B, C, D, E K2 ELK TN 0203 TERM BOX TB-203 KEO 675 A, B, C, D, E K2 GA HX 0003 GEN AIR COOLER 3 KEO 667 A, B, C, D, E K2 HPO PU 88HA AC GEN HP LIFT PUMP (88HA) KEO 675 A, B, C, D, E K2 TS LS 63SB TURB SUMP LEVEL SWITCH (2TSLS0002) KEO 675 A, B, C, D, E Page 3 of 3

Attachment 3 Oconee Unit 2, SWEL-2, Base-2 and Rapid Drawdown List Safety EQO. ID Description Sys EOQ. Class BLDG Col # Elev Room # Function 05/Horizonal Aux. SF Pool OSFPU0001 ASF Pump SF Pump Building T-73 783' 9" 218 Cooling 05/Horizonal Aux. SF Pool OSFPU0002 B SF Pump SF Pump Building T-73 783' 9" 218 Cooling BWST Recirculation 06/Vertical Aux. SF Pool OSFPU0004 Pump SF Pump Building T-74 783' 9" 218 Cooling 05/Horizonal Aux. SF Pool OSFPU0006 C SF Pump SF Pump Building T-73 783' 9" 218 Cooling 21/Heat Aux. SF Pool OSFHXOOOA A SF Cooler SF Exchanger Building T-74 783' 9" 218 Cooling 21/Heat Aux. SF Pool OSFHXOOOB B SF Cooler SF Exchanger Building T-74 783' 9" 218 Cooling 21/Heat Aux. SF Pool OSFHXOOOC C SF Cooler SF Exchanger Building T-73 783' 9" 218 Cooling 21/Tanks Heat Aux SF Pool OSFFLOOOA A SF Filter SF Exchanger Building 783' 219 Cooling 21/Tanks Heat Aux SF Pool OSFFLOOOB B SF Filter SF Exchanger Building 783' 219 Cooling 21/Tanks Heat Aux SF Pool OSFDMOO01 SF Demin SF Exchanger Building _ 783' 219 Cooling Page 1 of 1

Attachment 4 Oconee Unit 2, SWEL-2 List Safety EQ. ID Description Sys EQ. Class BLDG Col # Elev Room # Function 05/Horizonal Aux. SF Pool OSFPU0001 A SF Pump SF Pump Building T-73 783' 9" 218 Cooling 05/Horizonal Aux. SF Pool OSFPU0002 B SF Pump SF Pump Building T-73 783' 9" 218 Cooling 05/Horizonal Aux. SF Pool OSFPU0006 C SF Pump SF Pump Building T-73 783' 9" 218 Cooling 21/Heat Aux. SF Pool OSFHXOOOA A SF Cooler SF Exchanger Building T-74 783' 9" 218 Cooling 21/Heat Aux. SF Pool OSFHXOOOB B SF Cooler SF Exchanger Building T-74 783' 9" 218 Cooling 21/Heat Aux. SF Pool 0SFHX000C C SF Cooler SF Exchanger Building T-73 783' 9" 218 Cooling Page 1 of 1

Oconee's Seismic Walkdown Information Requested by NRC's March 12, 2012, 10CFR 50.54(f) Letter November 27, 2012 Enclosure 3 Unit 3 Seismic Walkdown Report (NRC 50.54 (f) NTTF Recommendation 2.3)

Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 Executive Summary Electric Power Research Institute (EPRI) Report 1025286, Seismic Walkdown Guidance for Resolution of Fukushima Near-Term Task.Force Recommendation 2.3: Seismic was issued in June 2012. This Document provides guidance and procedures to perform seismic walkdowns as required by the U.S. Nuclear Regulatory Commission's (NRC's) 50.54(f) letter regarding Near-Term Task Force (NTTF) Recommendation 2.3: Seismic. The EPRI guidance covers selection of personnel; selection of a sample of structures, systems, and components (SSCs) that represent diversity of component types and assures inclusion of components from critical systems / functions; conduct of the walkdowns; evaluation of potentially adverse conditions against the plant seismic licensing basis; and reporting requirements. It also includes check lists to be used by the Seismic Walkdown Engineers (SWEs) in performing the seismic walkdowns and walk-bys. Duke Energy committed to implement resolution of Near-Term Task Force (NTTF) Recommendation 2.3: Seismic using EPRI Report 1025286 in a letter to the NRC dated 7/9/2012.

1. Seismic Licensing Basis The seismic design basis for SSCs at Oconee nuclear station are defined in Section 3.7 of the UFSAR. Due to the vintage of Oconee nuclear station, some seismic terminology is not consistent with current terminology. The Operating Basis earthquake (OBE) is also referred to as the Design Basis earthquake (DBE) and the Safe Shutdown earthquake (SSE) is also referred to as the Maximum Hypothetical Earthquake (MHE).

1.1. Response Spectra The seismic spectrum response curves for Oconee were generated by the time history technique of seismic analysis. The sample earthquake utilized is that recorded at El Centro, California, N-S, May 18, 1940. The Peak Ground Acceleration (PGA) for the Design Basis earthquake (DBE) is 0.05g. The PGA for the Maximum Hypothetical earthquake (MHE) for Class 1 Structures founded on rock is 0.1g. The PGA for the Maximum Hypothetical Earthquake (MHE) for Class 1 Structures founded on overburden is 0.15g.

1.2. Seismic Qualification 1.2.1. Seismic Qualification of Safety-Related Mechanical Equipment When the response spectra at each elevation in the building have been determined, the G-loadings imposed on a component may then be determined. These loads are evaluated by the equipment supplier and in the case of complex components such as heat exchangers, the design calculations performed by the supplier are reviewed by B&W Engineering or Duke Energy, as applicable. The supplier has the freedom to use either of two alternate analytical methods to evaluate the equipment or he may choose to test it. Components maybe tested by either shaker or impact tests or a certification of the test results are required. In a few cases, a manufacturer's certification that the equipment would withstand seismic conditions is acceptable based on tests of similar equipment, an example of this would be similar type pumps. Analytically the evaluation can be made by calculating the natural frequency of the component, entering the appropriate damping curve and determining the amplification factor from the response spectrum curve. The equipment is then evaluated using these G-loadings. As an alternative, the component may be evaluated without calculating the natural frequency by using the peak amplification factor from the appropriate damping curve to determine Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

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Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 the equipment loads. This latter approach is conservative. Special attention is given to foundation and nozzle loadings for equipment such as tanks, pumps, heat exchangers, demineralizers and filters. Loads imposed by connecting piping on a given component are included and in some cases, component nozzles have had to be reinforced to accommodate these loads. Components which are most likely to require special reinforcement due to seismic loads, are long, horizontal, saddle mounted tanks, vertical tanks mounted on legs, and stacked heat exchangers. These have all been evaluated and appropriately designed for the seismic conditions. An alternate method of seismic qualification for mechanical equipment (within the applicable equipment classes) would be an experience based approach. Seismic adequacy can be established using methods described in the Generic Implementation Procedure (GIP) for Seismic Verification of Nuclear Plant Equipment, Revision 3A, developed by the Seismic Qualification Utility Group (SQUG). This method is also commonly known as SQUG.

1.2.2. Seismic Qualification of Safety-Related Electrical Equipment The seismic design basis for instrumentation and electrical equipment is that the electrical devices considered essential in performing Reactor Protection and Engineered Safeguards functions and in providing emergency power shall be designed to assure that they will not lose their capability to perform intended safety functions during and following the Safe Shutdown Earthquake (SSE). This basic criteria has remained unchanged since the issuance of the operating license; however, the seismic qualification techniques and documentation requirements for various plant modifications have in many instances followed the advances in the state of the art.

The seismic adequacy of all electrical cable tray supports is established by the methods and criteria established for cable tray supports in the Generic Implementation Procedure (GIP-3A) for Seismic Verification of Nuclear Plant Equipment, Rev 3A, developed by the Seismic Qualification Utility Group (SQUG).

In order to meet the seismic design objectives defined in UFSAR Section 3.10.1, the following seismic evaluation methods were employed consistent with the applicable licensing commitment.

Testing Devices may be qualified by either shaker or impact tests. A certification of the test results or copies of the test results are required. Additionally, a manufacturer's certification that a certain type of equipment would withstand the seismic conditions is acceptable based on previous testing/experience with similar equipment.

Analysis Devices may also be qualified by analytical methods. For example, one evaluation method involves calculating/determining the natural frequency of the device, entering the appropriate response spectra damping curves, and determining the corresponding amplification factor. The device is then evaluated using this "G" loading value.

Alternatively, the devices may be evaluated without calculating/determining its natural frequency by using the peak amplification factor from the appropriate response spectra damping curve to determine the "G" loading.

An alternate method of seismic qualification for electrical equipment (within the applicable equipment classes) would be an experience based approach. Seismic adequacy can be established using methods described in the Generic Implementation Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 Procedure (GIP) for Seismic Verification of Nuclear PlantEquipment, Revision 3A, developed by the Seismic Qualification Utility Group (SQUG). This method is also commonly known as SQUG.

1.3. Response to generic letter 87-02 Generic Letter 87-02, "Verification of Seismic Adequacy of Mechanical and Electrical Equipment in Operating Reactors, Unresolved Safety Issue (USI) A-46," was issued because the NRC concluded that the seismic adequacy of certain equipment in operating plants must be reviewed against seismic criteria developed during the resolution of Unresolved Safety Issue (USI) A-46.

The NRC determined that it is not feasible to require older operating plants to meet new licensing requirements that were not in use when plants were licensed. Therefore, an alternative method was selected to verify the seismic capability of equipment. This alternative method used a compilation of existing earthquake experience data supplemented by test data as the basis to verify the seismic capability of equipment. Generic Letter 87-02 allowed the seismic verification to be accomplished by utilities through a generic program, and the Seismic Qualification Utility Group (SQUG) was formed. The SQUG developed a Generic Implementation Procedure (GIP) that documents the seismic verification process, procedures, and methodologies for verifying the seismic qualification of equipment and resolving USI A-46. Supplement 1 of Generic Letter 87-02 endorsed use of the GIP for the seismic qualification process and contained revised licensee actions. Oconee performed the seismic qualification process in accordance with the NRC enforced version of the GIP. In a Safety Evaluation Report, the NRC concluded that Oconee met the purpose and intent of the seismic qualification process and that the corrective actions and modifications provide sufficient basis to close the USI A-46 review at Oconee.

The seismic verification process is considered part of the seismic licensing basis for Oconee, so the seismic qualification criteria developed by the SQUG in response to Generic Letter 87-02 must be considered during mechanical and electrical equipment modifications.

1.4. Codes and Standards The following codes, standards, and specifications were used during the design, construction, testing and in-service inspection of Class 1 Structures:

ASME-1965 - Boiler and Pressure Vessel Code, Sections III, VIII, and IX

AISC - Steel Construction Manual, 6th ed

Regulatory Guide 1.92, Combining Responses And Spatial Components In Seismic Response Analysis, Revision 1, February 1976

Regulatory Guide 1.29, Seismic Design Classification, Revision 3, September 1978

Supplement No. 1 To Generic Letter (GL) 87-02 That Transmits Supplemental Safety Evaluation Report NO.2 (SSER NO. 2) On SQUG Generic Implementation Procedure Revision 2, As Correction On February 14, 1992 (GIP-2), May 22, 1992

NRC Letter To SQUG Dated December 4, 1997. Supplemental Safety Evaluation Report NO. 3 (SSER NO. 3) On The Review Of Revision 3 To The Generic Implementation Procedure For Seismic Verification Of Nuclear Power Plant Equipment, Updated 5/16/97 (GIP-3)

NRC Letter To SQUG Dated 6/23/99, Review Of Seismic Qualification Utility Group's Report on the use of Generic Implementation Procedure for New and Replacement Equipment and Parts Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3

2. Personnel Qualifications The personnel involved in the Oconee NTTF Recommendation 2.3 Seismic Walkdown effort met the qualification requirements of EPRI 1025286. The personnel responsibilities and qualifications are outlined in TABLE 2.1 below. (Note: PE=Professional Engineer, CLB=Current License Basis, SWEL= Seismic Walkdown Equipment List)

Table 2.1 Years of Relevant 3:

Personnel Degree YasoRevntE*0 0)

Experience Qualifications 0 -j .2 (Duke Energy) BS/Civil Engineering 30 IPEEE, 6 )

(Duke Energy) BSCvlEgiern 2PESEE Ray Mc Coy BS/Civil Engineering 32 PESCE (Duke Energy) X Bob Hester B/ii niern 6PC (Duke Energy) B/CvlEgneig3PE EX Paul Mabry BS/Nuclear 27 SRO"), STA(5) X (Duke Energy) Engineering Tommy Loflin AS/Electrical 35+ SRO(4 ) X (Duke Energy) Engineering Jim Weir BS/Mechanical SWE'2',

(Duke Energy) Engineering SFC SYS ENG Charles M. BS/Civil Engineering 28 PE,SCE('), SWE (2) X(3)

Conselman (ARES)

James White (ARES) BS/Civil Engineering 42 PE,SCE(l), SWE (2) X(3)

John North (ARES) BS/Civil Engineering 28 PE,SWE(2) X(3)

Mike Donnelly BS/Civil Engineering 4 SWE(2) X (ARES)_________

Anthony Fazio BS/Chemical 40+ SWE(2) X (Shaw) Engineering John Spizuoco BS/Mechanical 44 PE,SCE(l), SWE(2) X (Shaw) Engineering Arthur Richert BS/Mechanical 32 PE,SWE(2) X (Shaw) Engineering Paul Baughman BS/Civil Engineering >40 PE,SCE(l), SWE (2)

(ARES)

George Bushnell BS/Mechanical 1

>40 PE,SCE( ), SWE (2) X (Shaw) Engineering Robert L. Keiser MS/Civil Engineering >20 PE,SCE(1 ), SWE (2) X (Duke Energy)

NOTES:

1) Seismic Capability Engineers (SCEs) who have successfully completed EPRI Experience Based Seismic Evaluation training.

2) Seismic Walkdown Engineers (SWEs) have successfully completed EPRI 1025286 2 day walkdown training course.

3) Senior Team Member.

4) Prior Senior Reactor Operator (SRO).

5) Prior Shift Technical Advisor

6) IPEEE seismic Walkdown Coordinator and current A-46/IPEE Program Owner (SQUG)

3. Selection of SSCs The Oconee Unit 3 SWEL-1 and SWEL-2 equipment selection was performed in accordance with the EPRI guidance outlined in EPRI Technical Report #1025286. SWEL-1 represents a Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 5 of 13

Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 sample of items to safely shut down the reactor and maintain containment integrity. SWEL-2 represents spent fuel pool related items.

The Oconee USI A-46/IPEEE Safe Shutdown Equipment List (SSEL) was used as the basis for the Base-1 equipment list. The scope of the Seismic Walkdown Equipment List (SWEL) is limited to SSCs that are classified as Seismic Category I. This is done such that items have a defined seismic licensing basis against which to evaluate the as-installed configuration. Oconee is a USI A-46 plant. The purpose of the USI A-46 program was to verify the seismic adequacy of essential equipment in older operating plants that had not been qualified in accordance with more recent criteria. Many of the SSC's listed in the USI A-46/IPEEE Safe Shut down Equipment List (SSEL) are not category I. However, Oconee programmatically maintains the seismic capability of these components. Therefore, for the purpose of developing the SWEL all USI A-46/IPEEE components are considered to have a seismic licensing basis.

The A-46/IPEEE SSEL effectively represents the output of EPRI guidance equipment Screening criteria's #1, #2 and #3. The underlying data used to generate the Base-1 list is contained in an ACCESS database. This ACCESS database was used to generate the Base-1 Equipment List from which the SWEL-1 was selected. The equipment comprising the Base-1 equipment list is contained in Attachment 1. Their individual Safety Function is identified as shown below. Some components support more than one safety function.

A. Reactor reactivity control B. Reactor coolant pressure control C. Reactor coolant inventory control D. Decay heat removal E. Containment function The Base-1 Equipment List is comprised of 2264 components from Oconee Units 1, 2 & 3 &

components that support all 3 Units (Common). The Base-1 Equipment list is contained in Attachment 1.

3.1. SWEL-1 Development EPRI TN-1025286 specifies that the SWEL-1 should be comprised of between 90-120 components and that each unit should have its own individual SWEL-I.

357 of the Base-1 components are Common components that support all 3 units. In order to account for these common components, -10% (39 items) of the base-1 common components were selected as SWEL-1 components. All of the 39 common components are considered to be part of each individual unit's SWEL-I.

The Unit 3 SWEL-1 consists of 131 components. Of these 131 components, 39 are common components which are also represented in each individual unit's SWEL-1. Attachment 2 contains the SWEL-1 components for Unit 3. The criteria for selection of equipment to be included in the SWEL are described in EPRI TN-1025286 section 3.

Screen #4 -- Sample Considerations -

Five sample selection attributes that should be represented in SWEL 1:

A variety of types of systems

Major new and replacement equipment

A variety of types of equipment

A variety of environments

Equipment enhanced due to vulnerabilities identified during the IPEEE program Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 In addition to the five sample considerations listed above, the equipment selected for the SWEL-1 should include considerations of the contribution to Risk for the SSC's and should also include a review by appropriate Operations personnel.

SWEL-1 Systems -

The SWEL-1 equipment list represents 24 systems associated with the 5 safety functions.

SWEL-1 Types of Equipment -

The SWEL-1 list contains representative equipment from all equipment classes with the following exceptions.

" There are no equipment Class 11 (Chillers), Class 12 (Air Compressors) or Class 13 (Motor - Generators) components on the Unit 3 SWEL-1 list because they are not represented in the Base-1 list.

" There are no equipment class 17 (Engine - Generators) on the Unit 3 SWEL-1. The Standby Shutdown Facility (SSF) Diesel Engine (16 Cylinder) (OSSFDEOOOA) is listed on the Base-1 list. However, it was not selected as part of the SWEL-1 due to its inherently robust nature and the very low seismic input at its location.

SWEL-1 Equipment locations -

The SWEL-1 equipment list includes equipment located in a broad variety of areas and environments. These areas comprise multiple buildings and elevations and include equipment located both inside and outside. The equipment areas provide a broad range of equipment environmental conditions, which include:

" Mild environmental conditions with limited temperature and humidity variations (e.g.

Control Room, Cable Rooms, Equipment Rooms, SSF Electrical Room, RelayHouse, etc.)

Moderate environmental conditions (e.g. general areas of the Auxiliary Building, East &

West Penetration Rooms, SSF Diesel Room, SSF Battery Room, Control Room Ventilation Rooms, etc.)

Moderate to harsh environmental conditions (e.g. LPI/BS/HPI Pump Rooms, LPI Cooler Room, etc.)

" Harsh environmental conditions (e.g. Inside RB Containment, etc.).

" Partial exposure to outdoor environmental conditions (e.g. Switchyard, Intake Structure)

Wet environments (Keowee Turbine Wheel Pit)

SWEL-1 Major New and Replacement Equipment -

In order to capture significant new and replacement equipment on the SWEL-1, a query was written which related the Base-1 equipment list to underlying data supporting Engineering Changes in the Duke Energy Nuclear Asset Suite Software (NAS). By doing this, a list EC's associated with all components on the Base-1 equipment list was generated. Editorial and minor modifications were then filtered out of the list. The following New and Replacement Equipment have been included in the Unit 3 SWEL-1.

Equipa Engineering.

ID No. ~ ~Ž Change> ,

3CLT0036 LIST 3A LEVEL ECO000072624 NSM ON-33098/00/00/AK1 - UPPER SURGE TANK INVENTORY PROTECTION OD301663 - REPLACE ROTORK OPER. WITH 3CCWVA0268 SSF ASW PUMP DISCH ISOL ECO000098122 O REPLC EV-26WI LIMITORQUE 3CCW-EV-268.

Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 Equip~ t-~~ngine'erlng, Name~ MOD Descriptio'n

..... . .. Change:

NSM ON-33032/00/00/DL1 - (REFURB) REPLACE 3CRDCACC2 DCRDCS CONTROL CABINET CC-5 EC0000068373 NSM ONTRO CRDM SR CONTROL SYSTEM L BREA NSM ON-33032/O0/00/DL1 - (REFURB) REPLACE 3CRDCACC5 DCRDCS CONTROL CABINET CC-5 ECO000068373 CRM ONTROL SYSTEM CRDM CONTROL SYSTEM EC91859 - BKUP FRM PWR-U3PSWPRESR.HTR AND BAT CONTROL BATT CHGR 3CA EC0000091859 CCA & B 3ELBC3CA CHRG 3CA & 3CB FRM PSW 3ELLX3X2 600V LC 3X02 EC0000108414 REPLACE 3X2 TRANSFORMER 00300070 - (REFURB) UNIT 3 ESFAS ESFAS ODD CH TERM CAB 3ESTC1 ECO000077069 R A MD ENT ITION 3ESCA3ESTC1 REPLACEMENT MODIFICATION 3ESVPL0001 UNIT 3 ESV LOCAL CONTROL ECO000049837 NSM ON-43000/00/00/BL1 - OCONEE SERVICE PANEL WATER 3ESVTF0003 600/240/120V 3SKN POWER ECO000049837 NSM ON-43000/00/00/BL1 - OCONEE SERVICE TRANSFORMER WATER FABRICATE COVER FOR BAILEY RP1211 E/P 3HPIEP0075 RCP SEAL INJECTION FLOW EC0000105844 COVERSION CONVERSION 3HPIHXOOOB LETDOWN COOLER 3B EC0000104674 ALLOW FOR REPLACEMENT OF 1/2/3 HPI HX OOOA/OOOB (LETDOWN COOLERS)

OE300846 - 3ANTAND 3B LETDOWN COOLER 3HPIHXOOOB LETDOWN COOLER 3B EC0000091493 R E REPLACEMENT 3LPIPUO001 3LPI PUMP A EC0000096420 0OD301990 - REPLACE LPI PUMP CYCLONE SEATO&SALRICS SEPARATOR & SEAL ORIFICES 3PPSCA001 RPS A/ES A1 EC0000077069 0D300070 - (REFURB)UNIT3ESFAS REPLACEMENT MODIFICATION 3PPSCA012 ES VOTER ODD ECO000077070 OD300071 - (REFURB) UNIT 3 RPS REPLACEMENT MODIFICATION OD300070 - (REFURB) UNIT 3 ESFAS 3PPSCA018 ES STATUS EVEN ECO000077069 R A MD ENT ITION REPLACEMENT MODIFICATION OE501326 - UNIT 1, 2 & 3 RBCU COOLING COIL 3RBCHXOOOA RB COOLING UNIT 3A ECO000092953 REPLACEMENT.

REPLACEMENT.

3RCLT0004P1 PRZ LEVEL TRANSMITTER EC0000089713 00300444 - (REFURB) UNIT 3 CR AND PLANT CHART REC UPGRADE 00300444 - (REFURB) UNIT 3 CR AND PLANT 3RCLT0123 3A RCS HOT LEG LVL (ICCM A) ECO000089713 CHART R URADE CHART REC UPGRADE 00300070 - (REFURB) UNIT 3 ESFAS ITION 3RCPT0022P RC PRESS XMTR (ES CH B) ECO000077069 R A ENTMD REPLACEMENT MODIFICATION 00300615 - REPLACE SSF CONTROL CONSOLE 3RCPT0226 U3 RC LOOP B PRESSURE EC0000090684 IDICATOR A RCSPTN INDICATORS AND RCS PTS 3VSAH0014 AHU-3-14 EC0000100113 REPLACE UNIT 3 CONTROL ROOM AHU 3-14 Oconee revised the modification process at the completion of the A-46/IPEEE programs to require plant modifications to evaluate impact to A-46/IPEEE components to ensure that the seismic capability of A-46/IPEEE components was not degraded Current site projects such as Protected Service Water (PSW) which are not operational and not currently credited within the Current Licensing Basis of Oconee are not within the scope of the SWEL-1.

SWEL-1 Equipment Enhanced per IPEEE -

Significant IPEEE enhancements associated with the Base-1 equipment list as reported in the IPEEE submittal dated 12/15/1997 were identified. SWEL-1 SSCs were selected such that a sampling of SSCs which had been enhanced per IPEEE was included. The following SWEL-1 SSCs were enhanced due to IPEEE.

Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 "quip Etigineering Name MOD Description~

11) No.Change 3ELBA3CA CONTROL BATT 3CA ONOE-13462 Add anchorage to AHU 3-31.

3ELBK3A 240/120V 3A REGULATOR ONOE-13992 Add bracing to unistrut frame supporting 3A/1B/SW, OUTPUT BKR 3A/MCB, 3B/MCB, 3A/REG, 3B/REG, 3A/XFMR & 3B/XRMR.

3ELCA3TTC4 TURB TERM CAB 3TTC4 ONOE-13557 Enhance existing anchorage for 3TTC4.

3ELMX3XAA 208V MCC 3XA-A ONOE-13560 Enhance existing anchorage for 3XA-A.

3ELMX3XGB MCC 3XGB ONOE-15068 Enhance existing anchorage of 3XGB.

3ELMX3XT MCC 3XT ONOE-15556 Add shims or move MCC 3XT.

3VSAH0014 AHU-3-14 ONOE-15561 Provide lateral & vertical seismic restraints to 3VSAH0014..

Revise OM-1393-0008 to reflect that anchorage for 1 & 2 3ELPL3EPSLP2 EPSL PANEL 3EPSLP2 ONOE-12245 ESTC1,2 & 3 is addressed in OSC-208.

SWEL-1 Risk Considerations -

EPRI TN-1 025286 requires that the development of SWEL 1 should include consideration of the importance of the contribution to risk for the SSCs.

In response to IPEEE, Oconee utilized the results of seismic margin methodology walkdowns to enhance the existing seismic PRA. These results are documented in OS-10225 "Seismic PRAIIPEEE Backup Calculations" and summarized in the Supplemental IPEEE submittal Report. From the conclusions presented in the Supplemental IPEEE submittal Report, PRA sequences involving loss of power and SSF response make up several of the most dominate PRA cut sets. SSC's supporting Keowee, the SSF and the 230 Kv switchyard are well represented in the SWEL-1.

In addition, input was obtained from the General Office PRA group to determine a ranking of the most seismically risk significant components.

Of the 31 unscreened PRA events with a contribution to CDF of greater than 0%, 19 are represented in the combined SWEL-1's for Units 1, 2 &3. This represents 61% of PRA risk significant components and meets the intent of EPRI TN-1025286.

SWEL-1 Operations review -

The SWEL71 equipment listed was submitted to Oconee Operations for review as recommended within EPRI TN-1025286. Operations concurred with the equipment listed on the SWEL-1 list. The SWEL-2 equipment list was developed within the Oconee Engineering organization by a highly experienced engineer who had previously held a Senior Reactor Operators License (SRO) and was previously an Operations Shift Technical Advisor (STA)..

3.2. SWEL-2 Development The Oconee Unit 3 SWEL-2 spent fuel pool equipment list was developed in accordance with the EPRI guidance. Seismic Category I structures, piping, and containment penetrations were specifically excluded by the EPRI guidance. The four screening criteria specified were as follows:

1) Seismic Category I or USI A-46 (SQUG) licensing bases,

2) Spent Fuel Pool (SFP) equipment appropriate for an equipment walkdown process,

3) Sample considerations represent broad population of equipment with considered sample selection attributes such as:

a. represent a variety of systems,

b. major new/replacement equipment, Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 9 of 13

Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 c- Variety of equipment types,

d. variety of environments

4) Equipment which could result in rapid drain down of the SFP (includes both seismic and non-seismic components and similar factors outlined in 3) above.

The SWEL-2 equipment Base-2 (Attachment 3) was established based on screens #1 and

2 above. Equipment was selected from the Base-2 list based on screening criteria #3 above, and primarily included major equipment such as the spent fuel cooling system pumps, pump motor air handling units, and heat-exchangers.

The SWEL-2 list was further evaluated based on screening criteria #4 above, to include equipment which could result in SFP rapid drain-down, as defined by the EPRI guidance.

All three Oconee Unit's have SF Pool transfer tubes that open to the SF Pool in normal operation. The SSF RC Make-up and letdown lines penetrate into the SF Pool transfer tubes. The SSF Make-up and Letdown lines meet Seismic Category 1. There were also SF Pool discharge lines at valves SF22&50 and 3SF-22&50 that could meet the criteria for a rapid drain down due to a siphon if the SF Cooling pump discharge piping, which meets Seismic Category 1, were to fail outside the SF Pool. However, this vulnerability had previously been identified and procedure requirements prevent system alignment and thereby remove this vulnerability. For these reasons, there are no rapid draw down items on the SWEL-2.

The SWEL-2 components were selected based on their radiological accessibility. Of the 3 pumps identified in the SWEL-2 base list, 2 were included in the SWEL-2. Of the 7 Tanks identified in the SWEL-2 base list, 4 were included in the SWEL-2. This sampling is in accordance with EPRI TN-1025286.

The final SWEL-2 list is provided in Attachment 4.

4. Seismic Walkdowns and Area Walk-Bys SWEL-1 SSCs which could only be accessed during an outage will be walked down by Duke Energy personnel and reported on at a later date. These SSCs are listed below.

t Eq i p N -... .d. ..

.u..i Na m e . . ...

3 RB 3FDWLT0082 SG 3A LEVEL TRANSMITTER 3 RB 3HPVA0004 LETDOWN ISOLATION 3 RB 3HPIFT0157 U3 RC MAKE UP PUMP FLOW 3 RB 3HPIHXOOOB LETDOWN COOLER 3B 3 RB 3RBCAH0020C RBCU FAN 3C 3 RB 3RBCHXOOOA RB COOLING UNIT 3A 3 RB 3RCLT0004P1 PRZ LEVEL TRANSMITTER 3 RB 3RCPT0022P RC PRESS XMTR (ES CH B) 3 RB 3RCPT0226 U3 RC LOOP B PRESSURE 3 RB 3RCRD0084A REACTOR OUTLET LOOP 3A 3 RB 3RCVA0066 PRZ PORV 3 RB 3RCVA0159 RV VENT ISOLATION 3 RB 3SFTKO002 INCORE INST HANDLING TANK Duke Energy contracted with the Shaw Group / ARES Corporation team to perform the majority of the NTTF 2.3 seismic walkdowns at Oconee Nuclear Station. A summary report of the walkdowns along with the individual Seismic Walkdown Checklists and the Area Walk-By Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 Checklists are contained in this report. The NTTF 2.3 Seismic Walkdown Report for Unit 1 is contained in Attachment 5. Items found to be inaccessible during this walkdown are addressed below.

Inaccessible SSCs -

Several Unit 3 SSC's were inaccessible due to their physical location or due to personnel safety concerns. These items are listed below.

Wu E.uip 1 "-*!".:ji-*. I a;mie- *. . I 3 TB 3ELLX3X2 600V LC 3XO2 3 AB 3ELLX3X8 600V LC 3X08 3 BH3 3ELSH3B1T02 RELAYS SECTION The anchorage for one SSC was only partially visible due to some of the welds being covered by mortar spillage from an adjacent masonry wall. A station Work request has been written to clean the weld area and the welds will be evaluated at a later date. This Item and several other inaccessible items listed below are common to all 3 units but will be included in the Unit 1 update report.

0 SYD OSYDPLSYDC1 SWITCHYARD DISTRIBUTION CENTER 1 K1 KEO K1PMGDTMPU1A SPEED CONTROL MAGNETIC PICKUP 1A K2 KEO K2ELKTNO203 TERM BOX TB-203 K2 KEO K2GAHX0003 GEN AIR COOLER 3 K2 KEO K2HPOPU88HA AC GEN HP LIFT PUMP (88HA)

K2 KEO K2TSLS63SB TURB SUMP LEVEL SWITCH (2TSLS0002)

An update to this report will be submitted by Sept 1, 2014. The update will provide the results associated with the Outage deferred items and the inaccessible items above. Associated Area Walk bys for the listed components will be completed in conjunction with the individual SSC's.

The concrete adjacent to the anchors for three SSCs listed below was not visible due to the installation of carpet. These items were given a status of Unknown in Appendix B to Attachment 5 of this report. The anchors for these SSC's were inspected as part of a major plant modification EC 0000077070 [OD300071 - (REFURB) UNIT 3 RPS Replacement Modification]

and EC 0000077069 [OD300070 - (REFURB) UNIT 3 ESFAS Replacement Modification] which was installed on 4/30/12 during 3EOC26. The anchors were torqued per procedure and inspected per QC at that time. Therefore the condition of the concrete at the anchors is assured per this previous inspection.

3 AB 3PPSCA0001 RPS A/ES Al 3 AB 3PPSCA0012 ES VOTER ODD 3 AB 3PPSCA0018 ES STATUS EVEN

5. Licensing Basis Evaluations A total of 15 potential adverse conditions were identified per the Seismic Walkdowns and the Area walk-by's. All of these potential issues were entered into the Corrective Action Program (CAP). All potential adverse conditions were evaluated for their compliance with the seismic licensing basis within the CAP and were found to be acceptable. Station Work Requests were written for some conditions as good practice. The potential adverse conditions and their Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 individual Problem Investigation process (PIP) tracking numbers are listed in the NTTF 2.3 Seismic Walkdown Report for Unit 3 contained in Attachment 5.

6. IPEEE Vulnerabilities Resolution Report Oconee submitted its response to IPEEE on 12/21/1995 & 12/15/1997. In those submittals, Oconee stated that there were no underlying significant sequences (vulnerabilities) from external events. There were also no plant changes identified that would significantly reduce risk from external events.

Table 6-1 of the IPEEE Submittal dated 12/15/1997 listed 152 enhancements. The enhancements identified have been completed by either Station Work Request, Plant Modification or Analysis.

Oconee is a USI A-46 plant and performed the USI A-46 walkdowns in conjunction with the IPEEE walkdowns. In Oconee's letter to the NRC dated 9/12/2002, Oconee confirmed that outliers associated with Generic Letter 87-02 (USI A-46) have been completed. Oconee performed the USI A-46 seismic evaluations in conjunction with the IPEEE evaluations. The criteria for both programs were conservatively enveloped such that an evaluation of a given component would address all aspects of both programs. IPEEE enhancements are a subset of the overall USI A-46 outliers. Therefore, implementation of the IPEEE enhancements is confirmed by the 9/12/2002 SQUG Outlier Resolution Completion Notice.

7. Peer Review Duke Energy (Duke) contracted with the Shaw Group (Shaw) / ARES Corporation (ARES)

Team to perform the NTTF 2.3 peer review at the Oconee Nuclear Station (ONS). The Peer Review Report is contained in Attachment 6.

The Peer Review Team consisted of three individuals, all of whom have seismic engineering experience as it applies to nuclear power plants. These individuals participated in the peer review of each of the activities. The members of the Peer review team and their qualifications are listed in table 2.1 The Peer Review team concluded that the Shaw/ARES methodology conforms to the guidance in Section 6 of EPRI 1025286. The peer review covered the following:

The selection of the SSCs included on the Seismic Walkdown Equipment List (SWEL).

" A sample of the checklists prepared for the seismic walkdowns and area walk-bys.

" The licensing basis evaluations.

The decisions for entering the potentially adverse conditions in the Corrective Action Program (CAP) process.

The submittal report.

The peer review process for the SWEL development and the seismic walkdowns consisted of the following:

" Reviewing the activity guidance in EPRI 1025286, the NEI Q&A bulletins, the NEI first-mover reports, and NRC Temporary Instruction 2515/188.

Conducting an in-process review at the plant site, including interviews with the personnel performing the activity and reviewing in-process documentation.

Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

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Unit 3 Seismic Walkdown Report - NRC 50.54 (f) NTTF Recommendation 2.3 0 Performing an in-plant surveillance (for the walkdown activity) of a seismic walkdown and an area walk-by.

Providing in-process observations and comments to the personnel performing the activities.

Conducting a final review of a sample of the completed documentation.

The peer review process for the licensing basis evaluations and the decisions for entering potentially adverse conditions into the CAP consisted of reviewing the overall review process and a sample of the licensing basis reviews. The peer review process for the submittal report consisted of reviewing the draft submittal prepared by Oconee Design Engineering for licensing review.

The conclusion of the peer review is that the ONS NTTF 2.3 seismic walkdown effort has been conducted in accordance with the guidance in EPRI 1025286. Comments made during the in-process review of the SWEL development and the walkdowns have been addressed satisfactorily. In-process comments on the final walkdown reports, the licensing basis reviews, and the submittal have also been resolved.

REFERENCES:

1) UFSAR Section 3.2.1 Seismic Classification (Rev. 21)

2) UFSAR Section 2.5.1.2 Site Geology (Rev. 21)

3) UFSAR Sections 2.5.2.10, 2.5.2.11 SSE/OBE (Rev. 21)

4) UFSAR Section 3.7 Seismic Design (Rev. 21)

5) EPRI Report 1025286, Dated May 2012, Seismic Walkdown Guidance for Resolution of Fukushima Near-Term Task Force (NTTF) Recommendation 2.3 (ATTACHMENT 1).

6) Oconee NRC Response to GL 88-20, Individual Plant Examination of External Events (IPEEE)

Submittal, dated Dec. 18, 1997, W. R. McCollum Jr. to NRC.

7) 7/9/12 correspondence to NRC from Ben C. Waldrep, "Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident" ATTACHMENTS:

1) Oconee Unit 3 SWEL-1 Base-1 List

2) Oconee Unit 3 SWEL-1

3) Oconee Unit 3 SWEL-2 Base-2 List and Rapid Drain Down List

4) Oconee Unit 3 SWEL-2

5) Seismic Walkdown Summary Report and Checklists

6) PEER Review Summary Report Attachment 5 Contains Security-Sensitive Information - Withhold From Public Disclosure under 10CFR 2.390(d)(1)

(Upon removal of Attachment 5 from the Enclosure, the Enclosure is uncontrolled)

Page 13 of 13

Attachment 1 Oconee Unit 3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 0 CCW CD 0001 SSF HVAC CONDENSER 1 SSF 817 B,C 0 CCW CD 0002 SSF HVAC CONDENSER 2 SSF 817 B,C 0 CCW PU 0001 AUX SERVICE WATER PUMP AB 771 D 0 CCW PU 0002 SSF AUX SERVICE WATER PUMP SSF 754 D 0 CCW PU 0003 HVAC SERVICE WTR PUMP 1 SSF 754 B,C 0 CCW PU 0004 HVAC SERVICE WTR PUMP 2 SSF 754 B,C 0 CCW PU 0005 SSF DIESEL WATER JACKET PUMP SSF 754 B,C 0 CCW PU 0010 SSF SUBMERSIBLE PUMP SSF 796 B,C 0 DA TK OOOA DIESEL STARTING AIR TANK A SSF 777 B,C 0 DA TK 000B DIESEL STARTING AIR TANK B SSF 777 B,C 0 DA TK 0OOC DIESEL STARTING AIR TANK C SSF 777 B,C 0 DA TK 000D DIESEL STARTING AIR TANK D SSF 777 B,C 0 DJW HX OOOA SSF DJW HEAT EXCHANGER A SSF 777 B,C 0 DJW HX 000B SSF DJW HEAT EXCHANGER B SSF 777 B,C 0 EL BS 4160CT4 4160V STANDBY BUS FDR FROM XFMR CT4 TO BIT & B2T TB 796 A, B, C, D, E 0 EL BS CCTRENCH CONTROL CABLE TRENCH (SWYD TO OCONEE) SYD 770 A, B, C, D, E 0 EL BS UFCT4 UNDERGROUND FEEDER (KEOWEE TO CT4) SYD 770 A, B, C, D, E 0 EL CA SYTC1 SWYD TERMINAL CABINET 01 SYD 770 A, B, C, D, E 0 EL CA SYTC12 SWYD TERMINAL CABINET 12 SYD 770 A, B, C, D, E 0 EL CA SYTC15 SWYD TERMINAL CABINET 15 SYD 770 A, B, C, D, E 0 EL CA SYTC17 SWYD TERMINAL CABINET 17 SYD 770 A, B, C, D, E 0 EL CA SYTC18 SWYD TERMINAL CABINET 18 SYD 770 A, B, C, D, E 0 EL CA SYTC19 SWYD TERMINAL CABINET 19 SYD 770 A, B, C, D, E 0 EL CA SYTC2 SWYD TERMINAL CABINET 02 SYD 770 A, B, C, D, E 0 EL CA SYTC3 SWYD TERMINAL CABINET 03 SYD 770 A, B, C, D, E 0 EL CA SYTC4 SWYD TERMINAL CABINET 04 SYD 770 A, B, C, D, E 0 EL CA SYTC5 SWYD TERMINAL CABINET 05 SYD 770 A, B, C, D, E 0 EL CA SYTC8 SWYD TERMINAL CABINET 08 SYD 770 A, B, C, D, E 0 EL PL CT4FSC CT4 FAN SPEED CABINET TB 796 A, B, C, D, E 0 EL PL DCSF 125 VDC POWER PNL BRD DCSF SSF 777 A, B, C, D, E 0 EL PL DCSF1 125 VDC DISTRIBUTION CENTER DCSF-1 SSF 777 A, B, C, D, E 0 EL PL KSF 208/120VAC SSF VITAL PWR PNL (GRAY) SSF 777 A, B, C, D, E 0 EL PL KSFC 120V PPB KSFC SSF 777 A, B, C, D, E 0 EL SH ASWS AUX SERV WATER SWGR (4160V) (1TD-0) AB 771 A, B, C, D, E 0 EL SH BIT05 SKi CT4 TO STDBY BUS 1 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH B1T09 SL1 CT5 STDBY BUS 1 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH BIT1O AUX SERVICE WATER SWGR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH B2TO5 SL2 CT5 STDBY BUS 2 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH B2T09 SK2 CT4 STDBY BUS 2 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL SH DGSWGR DIESEL GENERATOR SWITCHGEAR SSF 777 A, B, C, D, E 0 EL TF OCT4 XFMR CT-4 BH3 796 A, B, C, D, E 0 EL TF OCT5 XFMR CT-5 YD 796 A, B, C, D, E 0 FO PU 0005 SSF DIESEL ENGINE FUEL OIL TRANSFER PUMP SSF 777 B,C 0 FO TK 0003 SSF DIESEL OIL DAY TANK SSF 777 B,C Page 1 of 23

Attachment 1 Oconee Unit 3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FL EL Safety Function 0 FO TK 0004 SSF DIESEL OIL STORAGE TANK YD 785 B,C 0 HPS PG 0012 JOCKEY PUMP DISCH. PRESS. GAGE TB 775 B,C 0 HPS PG 0013 HPSW PUMP B DISCH. PRESS. GAGE TB 775 B,C 0 HPS PG 0016 HPSW PUMP A DISCH. PRESS. GAGE TB 775 B,C 0 HPS PG 0224 HPSW PUMP A STRAINER DP GAGE TB 775 B,C 0 HPS PG 0225 HPSW PUMP B STRAINER DP GAGE TB 775 B,C 0 HPS PG 0226 JOCKEY PUMP STRAINER DP GAGE TB 775 B,C 0 HPS PU 0001 HPSW STANDBY PUMP A TB 775 B,C 0 HPS PU 0002 HPSW STANDBY PUMP B TB 775 B,C 0 HPS PU 0003 HPSW JOCKEY PUMP TB 775 B,C 0 HPS VA 0140 Seal Supply Reg. Valve TB 775 B 0 HPS VA 0147 Seal Supply Reg. Valve TB 775 B 0 HPS VA 0154 Seal Supply Reg. Valve TB 775 B 0 LPS FL OOOA LPSW PUMP A STRAINER TB 775 D 0 LPS FL O0OB LPSW PUMP B STRAINER TB 775 D 0 LPS FL 0OOC LPSW PUMP C STRAINER TB 775 D 0 LPS PS 0097 A LPSW HDR PRESS #1 TB 775 D 0 LPS PS 0098 A LPSW HDR PRESS #2 TB 775 D 0 LPS PU OOOA LPSW PUMP A TB 775 D 0 LPS PU OOB LPSW PUMP B TB 775 D 0 LPS PU O0OC LPSW PUMP C TB 775 D 0 LPS VA 0175 LPSW PUMP A SEAL FLOW REG TB 775 D 0 LPS VA 0182 LPSW PUMP B SEAL FLOW REG TB 775 D 0 LPS VA 0189 LPSW PUMP C SEAL FLOW REG TB 775 D 0 NI CA 0225 SSF NUCLEAR INSTRUMENTATION RACK SSF 777 A, B, C, D, E 0 RCW HX OOOA A RCW HEAT EXCHANGER TB 775 D 0 RCW HX 0OOB B RCW HEAT EXCHANGER TB 775 D 0 RCW HX OOOC C RCW HEAT EXCHANGER TB 775 D 0 RCW HX 000D D RCW HEAT EXCHANGER TB 775 D 0 SSF BA DCSF DCSF SSF NORMAL BATTERY SSF 777 A, B, C, D, E 0 SSF BA DCSFS DCSFS SSF STANDBY BATTERY SSF 777 A, B, C, D, E 0 SSF CA 0002 PZR HEATER CAB (SSF)SSF PRESSURIZER HEATER CABINET (PHC) SSF 777 A, B, C, E 0 SSF CA 0003 SSF PRESSURIZER HEATER CABINET (PHC1) SSF 777 A, B, C, E 0 SSF CA ICI SSF EOC SYS INTERCONN CAB IC1 SSF 797 A, B, C, D, E 0 SSF CA IC2 SSF EOC SYS INTERCONN CAB IC2 SSF 797 A, B, C, D, E 0 SSF CA MEC MISC EQUIP CAB SSF 797 A, B, C, D, E 0 SSF DE OOOA SSF DIESEL ENGINE B (16 CYL) SSF 777 A, B, C, D, E 0 SSF MX XSF MCC XSF(600V) SSF 777 A, B, C, D, E 0 SSF PL SSFCP SSF CONTROL PANEL SSF 797 A, B, C, D, E 0 SSF SH OTS1 OTS1 SSF ESSENTIAL SWGR 4160V SSF 777 A, B, C, D, E 0 SYD BA SY1 230KV SWYD BATTERY #SY1 SYD 770 A, B, C, D, E 0 SYD BA SY2 230KV SWYD BATTERY #SY2 SYD 770 A, B, C, D, E 0 SYD BC SY1 230KV SWYD BATTERY CHARGER SY1 SYD 770 A, B, C, D, E 0 SYD BC SY2 230KV SWYD BATTERY CHARGER SY2 SYD 770 A, B, C, D, E Page 2 of 23

Attachment 1 Oconee Unit 3, SWEL-1.Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 0 SYD BD RB02 SWITCHYARD RELAY BOARD RB02 SYD 770 A, B, C, D, E 0 SYD BD RB03 SWITCHYARD RELAY BOARD RB03 SYD 770 A, B, C, D, E 0 SYD BD RB06 SWITCHYARD RELAY BOARD RB06 SYD 770 A, B, C, D, E 0 SYD BD RB07 SWITCHYARD RELAY BOARD RB07 SYD 770 A, B, C, D, E 0 SYD BD RB08 SWITCHYARD RELAY BOARD RB08 SYD 770 A, B, C, D, E 0 SYD BD RB1O SWITCHYARD RELAY BOARD RB10 SYD 770 A, B, C, D, E 0 SYD BD RB17 SWITCHYARD RELAY BOARD RB17 SYD 770 A, B, C, D, E o SYD BD RF02 SWITCHYARD RELAY BOARD RF02 SYD 770 A, B, C, D, E 0 SYD BD RF03 SWITCHYARD RELAY BOARD RF03 SYD 770 A, B, C, D, E O SYD BD RF06 SWITCHYARD RELAY BOARD RF06 SYD 770 A, B, C, D, E 0 SYD BD RF17 SWITCHYARD RELAY BOARD RF17 SYD 770 A, B, C, D, E 0 SYD BD SRB06 SWITCHYARD RELAY BOARD SRB06 SYD 770 A, B, C, D, E 0 SYD BD SRB09 SWITCHYARD RELAY BOARD SRB09 SYD 770 A, B, C, D, E 0 SYD BD SRB14 SWITCHYARD RELAY BOARD SRB14 SYD 770 A, B, C, D, E 0 SYD BD SRB15 SWITCHYARD RELAY BOARD SRB15 SYD 770 A, B, C, D, E 0 SYD BD SRB17 SWITCHYARD RELAY BOARD SRB17 SYD 770 A, B, C, D, E 0 SYD BD SRF06 SWITCHYARD RELAY BOARD SRF06 SYD 770 A, B, C, D, E 0 SYD BD SRF07 SWITCHYARD RELAY BOARD SRFO7 SYD 770 A, B, C, D, E 0 SYD BD SRF08 SWITCHYARD RELAY BOARD SRF08 SYD 770 A, B, C, D, E 0 SYD BD SRF09 SWITCHYARD RELAY BOARD SRF09 SYD 770 A, B, C, D, E 0 SYD BD SRF1O SWITCHYARD RELAY BOARD SRF10 SYD 770 A, B, C, D, E 0 SYD BD SRF17 SWITCHYARD RELAY BOARD SRF17 SYD 770 A, B, C, D, E O SYD BK PCBO8 230KV AC POWER CIRCUIT BREAKER 08 (PCB-08) SYD 770 A, B, C, D, E 0 SYD BK PCB09 230KV AC POWER CIRCUIT BREAKER 09 (PCB-09) SYD 770 A, B, C, D, E O SYD BK PCB12 230KV AC POWER CIRCUIT BREAKER 12 (PCB-12) SYD 770 A, B, C, D, E 0 SYD BK PCBS15 230KV AC POWER CIRCUIT BREAKER 15 (PCB-15) SYD 770 A, B, C, D, E 0 SYD BK PCB33 230KV AC POWER CIRCUIT BREAKER 33 (PCB-33) SYD 770 A, B, C, D, E o SYD BS 230KRED 230KV SWITCHYARD RED BUS SYD 770 A, B, C, D, E 0 SYD BS 230KYEL 230KV SWITCHYARD YELLOW BUS SYD 770 A, B, C, D, E 0 SYD BS TRENCH MISC SWYD TRENCHES SYD 770 A, B, C, D, E 0 SYD PL DYA DC PANELBOARD A SYD 770 A, B, C, D, E 0 SYD PL DYB DC PANELBOARD B SYD 770 A, B, C, D, E 0 SYD PL DYC DC PANELBOARD C SYD 770 A, B, C, D, E 0 SYD PL DYE DC PANELBOARD E SYD 770 A, B, C, D, E 0 SYD PL DYF DC PANELBOARD F SYD 770 A, B, C, D, E 0 SYD PL DYG DC PANELBOARD G SYD 770 A, B, C, D, E 0 SYD PL SYDC1 SWITCHYARD DISTRIBUTION CENTER 1 SYD 770 A, B, C, D, E 0 SYD PL SYDC2 SWITCHYARD DISTRIBUTION CENTER 2 SYD 770 A, B, C, D, E 0 SYD TF RBPT RED BUS POTENTIAL TRANSFORMER (EGPS) SYD 770 A, B, C, D, E 0 SYD TF YBPT YELLOW BUS POTENTIAL TRANSFORMER (EGPS) SYD 770 A, B, C, D, E 0 VS AH 0042 AHU 0-42 HEATING AND A/C SSF BUILDING SSF 817 B,C 0 VS AH 0044EX1 SSF CONST VENT SUPPLY FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX2 SSF SUMMER VENT SUPPLY FAN & MOTOR SSF 817 B,C O VS AH 0044EX3 SSF ON LINE VENT SUPPLY FAN & MOTOR SSF 817 B,C Page 3 of 23

Attachment 1 Oconee Unit 3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 0 VS AH 0044EX4 SSF ENGINE EX FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX5 SSF SUMMER EXHAUST FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX6 SSF ON LINE EXHAUST FAN & MOTOR SSF 817 B,C 0 VS AH 0044EX7 SSF CONSTANT EXHAUST FAN & MOTOR SSF 817 B,C 0 VS DA CDO1 SSF CONSTANT VENTILATION (VS-AH-0044EX1) EXHAUST FAN DAMPER SSF 817 B,C 0 VS DA CD02 SSF SUMMER VENTILATION (VS-AH-044EX2) EXHAUST FAN DAMPER SSF 817 B,C 0 VS DA CD03 SSF ON-LINE VENTILATION (VS-AH-0044EX3) EXHAUST FAN DAMPER SSF 817 B,C 0 VS DA ID01 SSF INLET DAMPER ID-1 (AH EXHAUST FAN AH0044EX4) SSF 817 B,C 0 VS DA ID0lE ACTUATOR FOR INTAKE DAMPER SSF-ID-A & B SSF 817 B,C 0 VS DA ID01W ACTUATOR FOR INTAKE DAMPER SSF-ID-C & D SSF 817 B,C 0 VS DA ID02 INLET DAMPER ID-2 (SSF AH EXH FAN AH0044EX3) SSF 817 B,C 0 VS DA ID02A ACTUATOR FOR INLET DAMPER SSF-ID2 (EXH FAN AH0044EX3) SSF 817 B,C 0 VS DA ID03 SSF INLET DAMPER ID-3 (AH EXHAUST FAN AH0044EX1) SSF 817 BC 0 VS DA ID03A ACTUATOR FOR INLET DAMPER SSF-ID3 (EXH FAN AH0044EX1) SSF 817 B,C 0 VS DA ID04 SSF INLET DAMPER ID-4 (AH EXHAUST FAN AH0044EX2) SSF 817 B,C 0 VS DA ID04A ACTUATOR FOR INLET DAMPER SSF-ID4 (EXH FAN AH0044EX2) SSF 817 B,C 0 VS DA XD01 SSF EXH DAMPER XD-1 (AH EXH. FAN AH0044EX4) SSF 817 B,C 0 VS DA XD01E ACTUATOR FOR EXH DAMPER SSF-XD-A&B SSF 817 B,C 0 VS DA XD01W ACTUATOR FOR EXH DAMPER SSF-XD-C&D SSF 817 B,C 0 VS DA XD02 SSF PRESS OPER EXH DAMPER XD-2 (AH EXH FAN AH0044EX7) SSF 817 B,C 0 VS DA XD03 SSF EXH DAMPER XD-3 (AH EXH FAN AH0044EX1) SSF 817 BC 0 VS DA XD03A ACTUATOR FOR EXH DAMPER SSF-XD3 (EXH FAN AH0044EX1) SSF 817 B,C 0 VS DA XD04 SSF PRESS OPER EXH DAMPER XD-4 (AH EXH. FAN AH0044EX5) SSF 817 B,C 0 VS DA XDOS SSF EXH DAMPER XD-S (AH EXH. FAN AH0044EX2) SSF 817 B,C 0 VS DA XD05A ACTUATOR FOR EXH DAMPER SSF-XD5 (EXH FAN AH0044EX2) SSF 817 B,C 0 VS DA XD06 SSF PRESS OPER EXH DAMPER XD-6 (AH EXH. FAN AH0044EX6) SSF 817 B,C 0 VS PE SSFPEO1 SSF SUMMER VENT. SYSTEM (VH) EXHAUST FAN (SSF-XF-3) SSF 825 A, B, C, D, E 0 VS PE SSFPE02 SSF A/C SYSTEM AIR HANDLING UNIT SSF TBD A, B, C, D, E 0 VS PL CPO1AH2 SSF CONTROL BOARD FOR THE HVAC SYSTEM SSF 817 A, B, C, D, E 0 VS PS SSFPS01 SSF CONSTANT VENTILATION SYSTEM SUPPLY FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS02 SSF SUMMER VENTILATION SYSTEM SUPPLY FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS03 SSF ON-LINE VENTILATION SYSTEM SUPPLY FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS04 SSF CONSTANT VENTILATION SYSTEM EXHAUST FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS05 SSF SUMMER VENTILATION SYSTEM EXHAUST FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS06 SSF ON-LINE VENTILATION SYSTEM EXHAUST FAN SSF 822 A, B, C, D, E 0 VS PS SSFPS07 SSF ENGINE VENTILATION SYSTEM EXHAUST FAN SSF 782 A, B, C, D, E 0 VS PS SSFPS08 SSF A/C SYSTEM AIR FLOW PRESS SWITCH SSF TBD A, B, C, D, E 0 VS TT SSFCT1 HVAC TEMPERATURE CONTROLLER (FOR SSF-AH-1) SSF 822 A, B, C, D, E 0 VS TT SSFCT2 HVAC TEMPERATURE CONTROLLER (FOR SSF-CP-1) SSF 822 A, B, C, D, E 3 AS PT 0117P AUX STEAM PRESSURE TRANSMITTER (MS-126 & MS-129) TB 796 D 3 BAG BD 3AB1 CONTROL BOARD 3AB1 AB 822 A, B, C, D, E 3 BAG BD 3AB2 CONTROL BOARD 3AB2 AB 822 A, B, C, D, E 3 BAG BD 3AB2A CONTROL BOARD 3AB2A AB 822 A, B, C, D, E 3 BAG BD 3AB3 CONTROL BOARD 3AB3 AB 822 A, B, C, D, E Page 4 of 23

Attachment 1 Oconee Uf 3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 3 BAG BD 3AB3A CONTROL BOARD 3AB3A AB 822 A, B, C, D, E 3 BAG BD 3UB1 CONTROL BOARD 3UB1 AB 822 A, B, C, D, E 3 BAG BD 3UB2 CONTROL BOARD 3UB2 AB 822 A, B, C, D, E 3 BAG BD 3VB1 CONTROL BOARD 3VB1 AB 822 A, B, C, D, E 3 BAG BD 3VB2 CONTROL BOARD 3VB2 AB 822 A, B, C, D, E 3 BAG BD 3VB3 CONTROL BOARD 3VB3 AB 822 A, B, C, D, E 3 BS PS 0018 RB PRESS SWITCH (ES CH 3A) (CHANNEL 7) AB 809 E 3 BS PS 0019 RB PRESS SWITCH (ES CH 3A) (CHANNEL 8) AB 809 E 3 BS PS 0020 RB PRESS SWITCH (ES CH 3B) (CHANNEL 7) AB 809 E 3 BS PS 0021 RB PRESS SWITCH (ES CH 3B) (CHANNEL 8) AB 809 E 3 BS PS 0022 RB PRESS SWITCH (ES CH 3C) (CHANNEL 7) AB 809 E 3 BS PS 0023 RB PRESS SWITCH (ES CH 3C) (CHANNEL 8) AB 809 E 3 BS PT 0004P RB PRESS XMTR (ES CH 3A) AB 809 E 3 BS PT 0005P RB PRESS XMTR (ES CH 3B) AB 809 E 3 BS PT 0006P RB PRESS XMTR (ES CH 3C) AB 809 E 3 BS PU 0001 RBS PUMP 3A AB 758 E 3 BS PU 0002 RBS PUMP 3B AB 758 E 3 BS VA 0001 RB SPRAY HEADER 3A ISOLATION AB 809 E 3 BS VA 0002 RB SPRAY HEADER 3B ISOLATION AB 809 E 3 BS VA 0003 RBS PUMP SUCTION ISOL AB 758 A,B,C,D 3 BS VA 0004 RBS PUMP SUCTION ISOL AB 758 E 3 C CD OOOA CONDENSER 3A TB 775 D 3 C CD 000B CONDENSER 3B TB 775 D 3 C CD OOOC CONDENSER 3C TB 775 D 3 C DM OOOA POLISHING DEMINERALIZER 3A TB 775 D 3 C DM 000B POLISHING DEMINERALIZER 3B TB 775 D 3 C DM OOOC POLISHING DEMINERALIZER 3C TB 775 D 3 C DM 000D POLISHING DEMINERALIZER 3D TB 775 D 3 C DM OOOE POLISHING DEMINERALIZER 3E TB 775 D 3 C HX 002A CONDENSATE COOLER A TB 775 D 3 C HX 002B CONDENSATE COOLER B TB 775 D 3 C LT 0015A UST 3B LEVEL TB 838 D 3 C LT 0036 UST 3A LEVEL TB 838 D 3 C PS 0015 UST MAKEUP LEVEL CONTROL (PS-15) TB 838 D 3 C PS 0036 UST MAKEUP LEVEL CONTROL (PS-36) TB 838 D 3 C PS 0227 CONDENSATE BOOSTER PUMP SUCTION HEADER PRESS LOW TB 775 D 3 C PU 0010 HOTWELL PUMP 3A TB 775 D 3 C PU 0011 HOTWELL PUMP 3B TB 775 D 3 C PU 0012 HOTWELL PUMP 3C TB 775 D 3 C PU 0019 HOLDING PUMP TB 775 D 3 C PU 0020 HOLDING PUMP TB 775 D 3 C PU 0021 HOLDING PUMP 3C TB 775 D 3 C PU 0022 HOLDING PUMP 3D TB 775 D 3 C PU 0023 HOLDING PUMP 3E TB 775 D Page 5 of 23

Attachment 1 Oco-hi'e Unit 3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 3 C SV 1920 SOLENOID VLV TO HOTWELL NORMAL MAKEUP CONTROL - VALVE 3C- TB 775 D 3 C TK 0003 SLURRY TANK TB 775 D 3 C TK OOOA UPPER SURGE TANK 3A TB 838 D 3 C TK O00B UPPER SURGE TANK 3B TB 838 D 3 C TK OOOC UPPER SURGE TANK DOME TB 838 D 3 C VA 0192 HOTWELL NORMAL MAKEUP CONTROL TB 775 D 3 C VA 0391 HOTWELL SUPPLY ISO TO TDEFW TB 775 D 3 CC HX OOOA COMPONENT COOLER 3A AB 783 A 3 CC HX 000B COMPONENT COOLER 3B AB 783 A 3 CCW FT 0225 SSF ASW FLOW AB 796 D 3 CCW PL 0268 REMOTE STARTER ENCLOSURE FOR 3CCW-268 SSF 754 D 3 CCW PL 0287 REMOTE STARTER ENCLOSURE FOR 3CCW-287 SSF 758 D 3 CCW PU 0001 CCW PUMP 3A INT 810 D,A 3 CCW PU 0002 CCW PUMP 3B INT 810 D,A 3 CCW PU 0003 CCW PUMP 3C INT 810 D,A 3 CCW PU 0004 CCW PUMP 3D INT 810 D,A 3 CCW PU 0024 EFWPT OIL COOLER PUMP TB 775 C 3 CCW VA 0268 SSF ASW PUMP DISCH ISOL SSF 754 D 3 CCW VA 0269 CROSSOVER ISOLATION TO A RB 777 D 3 CCW VA 0287 SSF ISOL VALVE SSF 754 D 3 CF TK OOOA CORE FLOOD TANK 3A RB 797 B, D 3 CF TK 000B CORE FLOOD TANK 3B RB 817 B,D 3 CRD CA 0001 CRD AC REACTOR TRIP BREAKER CABINET AB 809 A 3 CRD CA CC1 CONTROL CABINET CC-1 AB 809 A 3 CRD CA CC2 CONTROL CABINET CC-2 AB 809 A 3 CRD CA CC3 CONTROL CABINET CC-3 AB 809 A 3 CRD CA CC4 CONTROL CABINET CC-4 AB 809 A 3 CRD CA CC5 CONTROL CABINET CC-5 AB 809 A 3 CRD CA CC6 CONTROL CABINET CC-6 AB 809 A 3 CRD CA SRPSCC1 DCRDCS CONTROL CABINET SRPS CC1 AB 809 A 3 CRD CA SRPSCC2 DCRDCS CONTROL CABINET SRPS CC2 AB 809 A 3 CRD CA SRPSCC5 CONTROL CABINET CC-5 AB 809 A 3 CRD CA SRPSCC6 CONTROL CABINET CC-6 AB 809 A 3 CS VA 0005 QUENCH TANK DRAIN RB 777 A, BC 3 CS VA 0006 QUENCH TANK DRAIN AB 758 A,B,C 3 EHC CA EHC1 EHC CAB 3EHC1 AB 809 D 3 EHC CA EHC2 EHC CAB 3EHC2 -AB 809 D 3 EHC CA EHC3 EHC CAB 3EHC3 AB 809 D 3 EHC CA EHTC1 EHC TERM CAB 3EHTC1 AB 809 D 3 EHC CA EHTC2 EHC TERM CAB 3EHTC2 AB 809 D 3 EHC SV 1083 MASTER TRIP SOLENOID VALVE A TB 809 D 3 EHC SV 1084 MASTER TRIP SOLENOID VALVE B TB 809 D 3 EL BA 3CA CONTROL BATT 3CA AB 809 A, B, C, D,E 3 EL BA 3CB CONTROL BATT 3CB AB 809 A, B,C, D, E Page 6 of 23

Attachment 1 Oconee Unit 3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 3 EL BA 3PA PWR BATT 3PA TB 796 A, B, C, D, E 3 EL BA 3PB PWR BATT 3PB TB 796 A, B, C, D, E 3 EL BC 3CA CONTROL BATT CHGR 3CA AB 796 A, B, C, D, E 3 EL BC 3CB CONTROL BAIT CHGR 3CB AB 796 A, B, C, D, E 3 EL BC 3PA PWR BATT CHGR 3PA TB 796 A, B, C, D, E 3 EL BC 3PB PWR BATE CHGR 3PB TB 796 A, B, C, D, E 3 EL BI 3DIA 120V STATIC INV 3DIA AB 796 A, B, C, D, E 3 EL BI 3DIB 120V STATIC INV 3DIB AB 796 A, B, C, D, E 3 EL BI 3DIC 120V STATIC INV 3DIC AB 796 A, B, C, D, E 3 EL BI 3DID 120V STATIC INV 3DID AB 796 A, B, C, D, E 3 EL BI 3KI STATIC INVERTER 3KI (INCLUDES STATIC XFER SWITCH) AB 796 A, B, C, D, E 3 EL BI 3KU STATIC INVERTER 3KU (INCLUDES STATIC XFER SWITCH) AB 796 A, B, C, D, E 3 EL BI 3KX STATIC INVERTER 3KX (INCLUDES STATIC XFER SWITCH) AB 796 A, B, C, D, E 3 EL BK 3A 240/120V 3A REGULATOR OUTPUT BKR AB 796 A, B, C, D, E 3 EL BK 3B 240/120V 3B REGULATOR OUTPUT BKR AB 796 A, B, C, D, E 3 EL BS 230CT3 CT3 OVERHEAD FEEDER (SWYD PCB 30 TO CT3) SYD 796 A, B, C, D, E 3 EL BS 4160CT3 4160V STARTUP BUS FROM TRANSFORMER CT3 TB 796 A, B, C, D, E 3 EL BS 416OMFB1 4160V MAIN FEEDER BUS 1, B13, (3B1T TO 3TC,3TD,3TE) TB 796 A, B, C, D, E 3 EL BS 416OMFB2 4160V MAIN FEEDER BUS 2, B23, (3B2TTO 3TC,3TD,3TE) TB 796 A, B, C, D, E EL CA 3AT3 AREA TERM CAB 3AT3 AB 809 A, B, C, D, E EL CA 3AT4 AREA TERM CAB 3AT4 AB 809 A, B, C, D, E EL CA 3AXTC2 AUX TERMINAL CABINET 3AXTC2 TB 796 A, B, C, D, E EL CA 3EB1 ELECTRICAL BOARD 3EB1 AB 822 A, B, C, D, E EL CA 3EB2 ELECTRICAL BOARD 3EB2 AB 822 A, B, C, D, E EL CA 3EB3 ELECTRICAL BOARD 3EB3 AB 822 A, B, C, D, E EL CA 3EB4 ELECTRICAL BOARD 3EB4 AB 822 A, B, C, D, E EL CA 3EB5 ELECTRICAL BOARD 3EB5 AB 822 A, B, C, D, E EL CA 3EB6 ELECTRICAL BOARD 3EB6 AB 822 A, B, C, D, E EL CA 3EB7 ELECTRICAL BOARD 3EB7 AB 822 A, B, C, D, E EL CA 3EB8 ELECTRICAL BOARD 3EB8 AB 822 A, B, C, D, E EL CA 3MTC1 MISC TERM CAB 3MTC1 AB 809 A, B, C, D, E EL CA 3MTC2 MISC TERM CAB 3MTC2 AB 809 A, B, C, D, E EL CA 3MTC3 MISC TERM CAB 3MTC3 AB 809 A, B, C, D, E EL CA 3MTC4 MISC TERM CAB 3MTC4 AB 809 A, B, C, D, E EL CA 3T-C4 TURB TERM CAB 3TTC4 TB 796 A, B, C, D, E EL CA SGLC3 STEAM GEN LOGIC CABINET AB 809 A, B, C, D, E EL DI 3ADA ISOL DIODE ASSEMBLY 3ADA AB 796 A, B, C, D, E EL DI 3ADB ISOL DIODE ASSEMBLY 3ADB AB 796 A, B, C, D, E EL DI 3ADC ISOL DIODE ASSEMBLY 3ADC AB 796 A, B, C, D, E EL DI 3ADD ISOL DIODE ASSEMBLY 3ADD AB 796 A, B, C, D, E EL DI 3ADE ISOL DIODE ASSEMBLY 3ADE AB 796 A, B, C, D, E EL DI 3ADF ISOL DIODE ASSEMBLY 3ADF AB 796 A, B, C, D, E EL DI 3ADG ISOL DIODE ASSEMBLY 3ADG AB 796 A, B, C, D, E EL IR MC25 INSTRUMENT RACK 3MC-25 TB 796 D Page 7 of 23

Attachment 1 Oconee Unit 3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FL__EL Safety Function 3 EL IR MC29 INSTRUMENT RACK 3MC-29 TB 796 " D 3 EL IR MC32 INSTRUMENT RACK 3MC-32 TB 775 D 3 EL IR MC33 INSTRUMENT RACK 3MC-33 TB 775 D 3 EL IR PIR UNIT 3 PNEUMATIC INSTR RACK AB 809 B 3 EL LX 3X1 600V LC 3X01 TB 796 A, B, C, D, E 3 EL LX 3X10 600V LC 3X10 TB 796 A, B, C, D, E 3 EL LX 3X2 600V LC 3X02 TB 796 A, B, C, D, E 3 EL LX 3X3 600V LC 3X03 TB 796 A, B, C, D, E 3 EL LX 3X4 600V LC 3X04 TB 796 A, B, C, D, E 3 EL LX 3X5 600V LC 3X05 AB 796 A, B, C, D, E 3 EL LX 3X6 600V LC 3X06 AB 796 A, B, C, D, E 3 EL LX 3X8 600V LC 3X08 AB 796 A, B, C, D, E 3 EL LX 3X9 600V LC 3X09 AB 796 A, B, C, D, E 3 EL MX 3XA MCC 3XA TB 796 D 3 EL MX 3XAA 208V MCC 3XA-A TB 796 D 3 EL MX 3XB 600V MCC 3XB TB 775 D 3 EL MX 3XC MCC 3XC TB 775 D 3 EL MX 3XD 600V MCC 3XD TB 775 D 3 EL MX 3XGA MCC 3XGA TB 796 D 3 EL MX 3XGB MCC 3XGB TB 796 D 3 EL MX 3Xl 600V MCC 3Xl AB 809 D 3 EL MX 3XJ 600V MCC 3XJ AB 809 D 3 EL MX 3XL MCC 3XL AB 771 A, B, C 3 EL MX 3XN MCC 3XN AB 771 A, B, C 3 EL MX 3XO MCC 3XO AB 796 A, B, C, D, E 3 EL MX 3XP MCC 3XP AB 796 A, B, C, D, E 3 EL MX 3XR 600V MCC 3XR AB 838 A 3 EL MX 3XS1 MCC 3XS1 AB 796 A, B, C, D, E 3 EL MX 3XS2 MCC 3XS2 AB 796 A, B, C, D, E 3 EL MX 3XS3 MCC 3XS3 AB 796 A, B, C, D, E 3 EL MX 3XSF MCC 3XSF(600V) SSF 817 A, B, C, D, E 3 EL MX 3XSF1 MCC 3XSF-1 (208V) SSF 797 A, B, C, D, E 3 EL MX 3XSFA MCC 3XSF(208V) SSF 817 A, B, C, D, E 3 EL MX 3XT MCC 3XT AB 838 D 3 EL PL 3CPS 3 POWDEX PANEL TB 775 D 3 EL PL 3DCA 125V DC 3DCA AB 796 A, B, C, D, E 3 EL PL 3DCB 125V DC 3DCB AB 796 A, B, C, D, E 3 EL PL 3DIA 125V PPB 3DIA AB 809 A, B, C, D, E 3 EL PL 3DIB 125V PPB 3DIB AB 809 A, B, C, D, E 3 EL PL 3DIC 125V PPB 3DIC AB 809 A, B, C, D; E 3 EL PL 3DID 125V PPB 3DID AB 809 A, B, C, D, E 3 EL PL 3DL2 250V DC 3DL2 PPB AB 796 A, B, C, D, E 3 EL PL 3DP 125/250V DC 3DP TB 796 A, B, C, D, E 3 EL PL 3EPSLP1 EPSL PANEL 3EPSLP1 AB 809 A, B, C, D, E Page 8 of 23

Attachment 1 Oconee Unit 3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FL EL Safety Function 3 EL PL 3EPSLP2 EPSL PANEL 3EPSLP2 AB 809 A, B, C, D, E 3 EL PL 3KA 120V PPB 3KA TB 775 A, B, C, D, E 3 EL PL 3KB 120V PPB 3KB TB 775 A, B, C, D, E 3 EL PL 3KC 120V PPB 3KC TB 796 A, B, C, D, E 3 EL PL 3KD 120V PPB 3KD AB 771 A, B, C, D, E 3 EL PL 3KE 120V PPB 3KE AB 796 A, B, C, D, E 3 EL PL 3KESP KEOWEE EM START PANEL AB 809 A, B, C, D, E 3 EL PL 3KG 120V PPB 3KG AB 838 A, B, C, D, E 3 EL PL 3KI 120V PPB 3KI AB 809 A, B, C, D, E 3 EL PL 3KM 120V PPB 3KM AB 809 A, B, C, D, E 3 EL PL 3KRA 120V PPB 3KRA AB 809 A, B, C, D, E 3 EL PL 3KRB 120V PPB 3KRB AB 809 A, B, C, D, E 3 EL PL 3KU 120V PPB 3KU AB 809 A, B, C, D, E 3 EL PL 3KVIA 120V PPB 3KVIA AB 809 A, B, C, D, E 3 EL PL 3KVIB 120V PPB 3KVIB AB 809 A, B, C, D, E 3 EL PL 3KVIC 120V PPB 3KVIC AB 809 A, B, C, D, E 3 EL PL 3KVID 120V PPB 3KVID AB 809 A, B, C, D, E 3 EL PL 3KX 120V PPB 3KX AB 809 A, B, C, D, E 3 EL PL 3121 125V DC PPB 3121 AB 822 A, B, C, D, E 3 EL PL 3L22 125V DC PPB 3L22 AB 822 A, B, C, D, E 3 EL PL 3SGFP SG FWP PANEL TB 775 A, B, C, D, E 3 EL PL 3SKJ 208/120V PPB 3SKJ AB 809 A, B, C, D, E 3 EL PL 3SKK 208/120V PPB 3SKK AB 809 A, B, C, D, E 3 EL PL 3SKL 120V PPB 3SKL AB 809 A, B, C, D, E 3 EL PL 3SKM 240/120V PPB 3SKM ESV 797 A, B, C, D, E 3 EL PL 3SKN 240/120V PPB 3SKN ESV 797 A, B, C, D, E 3 EL PL 3SKP 240/120V PPB 3SKP ESV 797 A, B, C, D, E 3 EL PL 3TCPA TURB CONT PANEL 3TCPA TB 796 A, B, C, D, E 3 EL PL 3TDC31 TRANSDUCER CAB 3TDC3 AB 809 A, B, C, D, E 3 EL PL HBP UNIT 3 HEATER BLANKETING PANEL TB 822 D 3 EL PL MFBMRP MAIN FDR BUS MONITOR RLY PANEL AB 809 A, B, C, D, E 3 EL PL PZR3B 600V PPB 3B (FOR PRESSURIZER HEATERS GROUP 3B BANK 2) RB 817 A, B, C, D, E 3 EL SH 3BIT01 E13 MFB1 STARTUP FDR BKR SECTION BH3 796 A, B, C, D, E 3 EL SH 3B1T02 RELAYS SECTION BH3 796 A, B, C, D, E 3 EL SH 3B1T03 POTENTIAL TRANSFORMER SECTION BH3 796 A, B, C, D, E 3 EL SH 3B1T05 N13 3MFB1 NORM FDR FROM 3T XFMR SECTION BH3 796 A, B, C, D, E 3 EL SH 3B2T01 N23 MFB2 NORMAL FDR BKR SECTION BH3 796 A, B, C, D, E 3 EL SH 3B2T02 POTENTIAL TRANSFORMER SECTION BH3 796 A, B, C, D, E 3 EL SH 3B2T03 RELAYS SECTION BH3 796 A, B, C, D, E 3 EL SH 3B2T05 E23 MFB2 STARTUP FDR BKR SECTION BH3 796 A, B, C, D, E 3 EL SH 3TC01 3TC BUS 1 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 3 EL SH 3TC14 3TC BUS 2 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 3 EL SH 3TDO1 3TD BUS 1 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 3 EL SH 3TD14 3TD BUS 2 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E Page 9 of 23

Attachment 1 Oconee Unit 3, SWEL-1, Base 1 EqUil ment List Unit Sys Type Number Description Bldg. FLEL Safety Function 3 EL SH 3TE01 3TE BUS 1 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 3 EL SH 3TE14 3TE BUS 2 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 3 EL SH B1T07 513 STBY BUS 1 TO MFB1 BKR SECTION BH1 796 A, B, C, D, E 3 EL SH B2T07 S23 STBY BUS 2 TO MFB2 BKR SECTION BH1 796 A, B, C, D, E 3 EL SX 3KIBKUP BACKUP TRANSFER SWITCH 3KI AB 796 A, B, C, D, E 3 EL SX 3KIBYP INVERTER BYPASS SWITCH 3KI AB 796 A, B, C, D, E 3 EL SX 3KUBKUP BACKUP TRANSFER SWITCH 3KU AB 796 A, B, C, D, E 3 EL SX 3KUBYP INVERTER BYPASS SWITCH 3KU AB 796 A, B, C, D, E 3 EL SX 3KXBKUP BACKUP TRANSFER SWITCH 3KX AB 796 A, B, C, D, E 3 EL SX 3KXBYP INVERTER BYPASS SWITCH 3KX AB 796 A, B, C, D, E 3 EL SX ABXFER 3A/3B REG XFER SW AB 796 A, B, C, D, E 3 EL TF 0CT3 XFMR CT-3 TB 796 A, B, C, D, E 3 EL TF 3A XFMR 3A (600V TO 240V) AB 796 A, B, C, D, E 3 EL TF 3B XFMR 3B (600V TO 240V) AB 796 A, B, C, D, E 3 EL TF 3KB 600/208V TRANSFORMER 3KB TB 775 A, B, C, D, E 3 EL TF 3KC 600/208V TRANSFORMER 3KC TB 796 A, B, C, D, E 3 EL TF 3KI ISOLATION XFMR SHIELDED 3KI AB 796 A, B, C, D, E 3 EL TF 3KU ISOLATION XFMR SHIELDED 3KU AB 796 A, B, C, D, E 3 EL TF 3XA XFMR 3XA (600V TO 208V) TB 796 A, B, C, D, E 3 EL TF 3XC XFMR 3XC (600V TO 208V) TB 775 A, B, C, D, E 3 EL TF 3XGA XFMR 3XGA (600V TO 208V) TB 796 A, B, C, D, E 3 EL TF 3XGB XFMR 3XGB (600V TO 208V) TB 796 A, B, C, D, E 3 EL TF 3XL XFMR 3XL (600V TO 208V) AB 771 A, B, C, D, E 3 EL TF 3XN XFMR 3XN (600V TO 208V) AB 771 A, B, C, D, E 3 EL TF 3XO XFMR 3XO (600V TO 208V) AB 796 A, B, C, D, E 3 EL TF 3XP XFMR 3XP (600V TO 208V) AB 796 A, B, C, D, E 3 EL TF 3XR XFMR 3XR (600V/208V) AB 838 A, B, C, D, E 3 EL TF 3XSIA XFMR 3XS1A (600V TO 208V) AB 796 A, B, C, D, E 3 EL TF 3XS2A XFMR 3XS2A (600V TO 208V) AB 796 A, B, C, D, E 3 EL TF 3XS3A XFMR 3XS3A (600V TO 208V) AB 796 A, B, C, D, E 3 EL TF 3XSF XFMR 3XSF (600V TO 208V) SSF 817 A, B, C, D, E 3 EL TF 3XT XFMR 3XT (600V TO 208V) AB 838 A, B, C, D, E 3 EL TN 2345 TERMINAL BOX TB-2345 AB 809 B 3 EL TN 2346 TERMINAL BOX TB-2346 AB 809 B 3 EL TN 2353 TERMINAL BOX TB-2353 TB 796 D 3 EL VR 000A REGULATED PWR SUPP REG 3A AB 796 A, B, C, D, E 3 EL VR 000B REGULATED PWR SUPP REG 3B AB 796 A, B, C, D, E 3 ES CA 0001 ES ANALOG CABINET 1 AB 822 A, B, C, D, E 3 ES CA 0002 ES ANALOG CABINET 2 AB 822 A, B, C, D, E 3 ES CA 0003 ES ANALOG CABINET 3 AB 822 A, B, C, D, E 3 ES CA 0004 ES LOGIC CABINET 4 AB 822 A, B, C, D, E 3 ES CA 0005 ES LOGIC CABINET 5 AB 822 A, B, C, D, E 3 ES CA 0006 ES LOGIC CABINET 6 AB 822 A, B, C, D, E 3 ES CA 0007 ES LOGIC CABINET 7 AB 822 A, B, C, D, E Page 10 of 23

Attachment 1 Oconee Unit 3, SWEL-1, BaS -1 Equipment List Unit Sys Type Number Description Bldg. FL.EL Safety Function 3 ES CA 0008 ES LOGIC CABINET 8 AB 822 A, B,C, D,E 3 ES CA 0009 ES LOGIC CABINET 9 AB 822 A,B,C,D,E 3 ES CA 3ESTC1 ESFAS ODD CH TERM CAB 3ESTC1 AB 809 A, B, C, D, E 3 ES CA 3ESTC2 ESFAS EVEN CH TERM CAB 3ESTC2 AB 809 A, B, C, D, E 3 ES CA 3ESTC2A ESFAS AUX RLY CAB 3ESTC2A AB 809 A, B, C, D, E 3 ES CA 3ESTC3 ES ODD & EVEN RLY CAB 3ESTC3 AB 809 A, B, C, D, E 3 ESV CA 3ESV1 ESV PUMP CONTROLS RELAY CABINET 3ESV1 AB 796 D 3 ESV CA 3ESV2 ESV PUMP CONTROLS RELAY CABINET 3ESV2 AB 796 D 3 ESV CA 3ESV3 ESV PUMP CONTROLS RELAY CABINET 3ESV3 AB 796 D 3 ESV PL 0001 UNIT 3 ESV LOCAL CONTROL PANEL ESV 797 D 3 ESV PT 0001 ESV TANK PRESSURE TRANSMITTER ESV 797 D 3 ESV PT 0002 ESV TANK PRESSURE TRANSMITTER ESV 797 D 3 ESV PU 0001 ESV PUMP 3A ESV 797 D 3 ESV PU 0002 ESV PUMP 3B ESV 797 D 3 ESV PU 0003 ESV PUMP 3C ESV 797 D 3 ESV TF 0001 600/240/120V 3SKM POWER TRANSFORMER ESV 797 D 3 ESV TF 0002 600/240/120V 3SKN POWER TRANSFORMER ESV 797 D 3 ESV TF 0003 600/240/120V 3SKN POWER TRANSFORMER ESV 797 D 3 ESV TK 0001 ESV Receiver Tank 3A ESV 797 D 3 ESV TK 0002 ESV Receiver Tank 3B ESV 797 D 3 ESV VA 0001 ESV FLOAT VALVE YD 796 D 3 ESV VA 0002 ESV FLOAT VALVE YD 796 D 3 ESV VA 0028 ESV TANK MIN. FLOW VALVE ESV 797 D 3 ESV VA 0029 ESV TANK MIN. FLOW VALVE ESV 797 D 3 FDW FT 0140 3A EFW HEADER FLOW AB 783 D 3 FDW FT 0141 38 EFW HEADER FLOW AB 783 D 3 FDW FT 0153 3A EFW HEADER FLOW TRANSMITTER AB 783 D 3 FDW FT 0154 3B EFW HEADER FLOW TRANSMITTER AB 783 D 3 FDW LT 0066 S/G 3A LEVEL RB 777 D 3 FDW LT 0067 S/G 3B LEVEL RB 777 D 3 FDW LT 0080 SG 3A LEVEL TRANSMITTER RB 777 D 3 FDW LT 0081 SG 38 LEVEL TRANSMITTER RB 777 D 3 FDW LT 0082 SG 3A LEVEL TRANSMITTER RB 777 D 3 FDW LT 0083 SG 3B LEVEL TRANSMITTER RB 777 D 3 FDW PL 0368 REMOTE STARTER ENCLOSURE FOR 3FDW-368 AB 809 D 3 FDW PL 0369 REMOTE STARTER ENCLOSURE FOR 3FDW-369 AB 809 D 3 FDW PL 0372 REMOTE STARTER ENCLOSURE FOR 3FDW-372 AB 809 D 3 FDW PL 0374 REMOTE STARTER ENCLOSURE FOR 3FDW-374 AB 809 D 3 FDW PL 0382 REMOTE STARTER ENCLOSURE FOR 3FDW-382 AB 809 D 3 FDW PL 0384 REMOTE STARTER ENCLOSURE FOR 3FDW-384 AB 809 D 3 FDW PL ATWSCP U3 ATWS CONTROL PANEL AB 838 D 3 FDW PS 0300 3EFPT LOW HYDR OIL PRESS SWITCH TB 775 C 3 FDW PS 0382 FWPT 3A CONTROL OIL PRESS SWITCH TB 775 D 3 FDW PS 0383 FWPT 3A CONTROL OIL PRESS SWITCH TB 775 D Page 11 of 23

Attachment 1 Oconee Unit 3, SWEL41 , Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 3 FDW PS 0384 FWPT 3B CONTROL OIL PRESS SWITCH TB 775 D 3 FDW PS 0385 FWPT 3B CONTROL OIL PRESS SWITCH TB 775 D 3 FDW PS 1011 MAIN FWP DISCH HDR PRESS SWITCH (3MS-93) TB 775 D 3 FDW PS 1012 MAIN FWP DISCH HDR PRESS SWITCH (3MS-93) TB 775 D 3 FDW PU 0003 TDEFW PUMP TB 775 D 3 FDW PU 0004 MDEFW PUMP 3A TB 775 D 3 FDW PU 0005 MDEFW PUMP 3B TB 775 D 3 FDW SV 0037 STEAM GEN ASAMPLE ISOL VALVE FOR 3FDW-106 AB 809 D 3 FDW SV 0038 STEAM GEN B SAMPLE ISOL VALVE FOR 3FDW-108 AB 822 D 3 FDW TN 3TBATWS1 ATSW TERM BOX 1 AB 809 D 3 FDW TN 3TBATWS2 ATSW TERM BOX 2 AB 809 D 3 FDW TN 3TBFPT FEEDWATER PUMP TURBINE TERMINAL BOX TB 775 D 3 FDW VA 0086 PRESS REG TD PUMP SEALS TB 775 D 3 FDW VA 0087 PRESS REG TD PUMP SEALS TB 775 D 3 FDW VA 0105 SG 3A SAMPLE ISOLATION RB 808 D 3 FDW VA 0106 SG 3A SAMPLE ISOLATION AB 809 D 3 FDW VA 0107 SG 3B SAMPLE ISOLATION RB 808 D 3 FDW VA 0108 SG 3B SAMPLE ISOLATION AB 809 D 3 FDW VA 0129 PRESS REG TD PUMP SEALS TB 775 D 3 FDW VA 0218 PRESS REG TD PUMP SEALS TB 775 D 3 FDW VA 0315 MDEFW PUMP 3A ISOLATION AB 809 D 3 FDW VA 0316 MDEFW PUMP 3B ISOLATION AB 809 D 3 GEN BS IPB ISOLATED PHASE BUS 19KV TB 796 A, B, C, D, E 3 GWD VA 0012 QUENCH TANK VENT RB 797 A, B, C 3 GWD VA 0013 QUENCH TANK VENT AB 809 A, B, C 3 HP VA 0003 LETDOWN ISOLATION RB 777 B 3 HP VA 0004 LETDOWN ISOLATION RB 777 B 3 HP VA 0005 LETDOWN ISOLATION AB 809 B 3 HP VA 0020 RCP SEAL RETURN ISOLATION RB 817 B 3 HP VA 0021 RCP SEAL RETURN CONTAIN ISOL AB 809 B 3 HP VA 0024 BWST SUCTION ISOLATION AB 771 A,B,C 3 HP VA 0025 BWST SUCTION ISOLATION AB 771 A,B,C 3 HP VA 0026 HPI LOOP 3A INJECTION AB 809 A,B,C 3 HP VA 0027 HPI TRAIN 3B (EMERGENCY) INJECTION AB 809 A,B,C 3 HP VA 0031 RCP SEAL INJ FLOW CONTROL AB 796 B 3 HP VA 0071 SEAL RETURN LINE RELIEF AB 771 B 3 HP VA 0120 RC VOLUME CONTROL AB 809 A,B,C 3 HP VA 0355 HPI AUX SPRAY THROTTLE AB 809 C 3 HP VA 0398 RC MAKEUP PUMP TO RCP SEALS BLOCK RB 777 B 3 HP VA 0409 HPI CROSSOVER ISOLATION AB 809 A,B,C 3 HP VA 0410 HPI CROSSOVER ISOLATION AB 809 A,B,C 3 HP VA 0426 ALT LETDOWN PATH ISOLATION RB 777 A,B 3 HP VA 0428 ALT LETDOWN PATH ISOLATION RB 777 A,B 3 HPI EP 0003 MAKEUP FLOW CONTROL AB 809 A,B,C Page 12 of 23

Attachment 1 Oconee Unit-3,SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FL EL Safety Function 3 HPI EP 0075 RCP SEAL INJECTION FLOW AB 783 B 3 HPI FT 0007A A LOOP INJ FLOW TRANSMITTER AB 758 A,B,C 3 HPI FT 0008A HPI LOOP 3B FLOW XMTR AB 758 A,B,C 3 HPI FT 0075 RCP SEAL [NJ FLOW TRANSMITTER AB 783 B 3 HPI FT 0101 RC PUMP SEAL INLET FLOW XMTR (Powered by ICS) AB 783 B 3 HPI FT 0102 RC PUMP SEAL INLET FLOW XMTR (Powered by ICS) AB 783 B 3 HPI FT 0103 RC PUMP SEAL INLET FLOW XMTR (Powered by ICS) AB 783 B 3 HPI FT 0104 RC PUMP SEAL INLET FLOW XMTR (Powered by ICS) AB 783 B 3 HPI FT 0157 U3 RC MAKE UP PUMP FLOW RB 777 B 3 HPI FT 0160 B LOOP INJ FLOW TRANSMITTER AB 809 A,B,C 3 HPI HX OOOA LETDOWN COOLER 3A RB 777 B 3 HPI HX 000B LETDOWN COOLER 3B RB 777 B 3 HPI HX 001A RC SEAL RETURN COOLER 3A AB 771 B 3 HPI HX 001B RC SEAL RETURN COOLER 3B AB 771 B 3 HPI LT 0033P1 LDST LEVEL TRANSMITTER (TRAIN 1) AB 771 B 3 HPI LT 0033P2 LDST LEVEL TRANSMITTER (TRAIN 2) AB 771 B 3 HPI PL 0409 REMOTE STARTER ENCLOSURE FOR 3HP-409 AB 796 A,B,C 3 HPI PL 0410 REMOTE STARTER ENCLOSURE FOR 3HP-410 AB 796 A,B,C 3 HPI PS 0357 LETDOWN FLOW TEMP HIGH INTERLOCK AB 783 B 3 HPI PU 0001 HPI PUMP 3A AB 758 A,B,C 3 HPI PU 0002 HPI PUMP 3B AB 758 A,B,C 3 HPI PU 0003 HPI PUMP 3C AB 758 A,B,C 3 HPI PU 0005 SSF RC MAKEUP PUMP RB 777 B 3 HPI SV 0090 CONTROLS LETDOWN ISOLATION VALVE FOR 3HP-5 AB 809 B 3 HPI SV 0095 RC PUMP SEAL RETURN ISOLATION VLV FOR 3HP-21 AB 809 B 3 HPI TK 0001 LETDOWN STORAGE TANK AB 771 B 3 HT PL 3KTH1 TRACE HEATING PWR. PNLBD. 3KTH1 AB 771 D 3 HT PL 3KTH2 TRACE HEATING POWER PNL 3KTH2 AB 771 D 3 HT PL EP031 EMERG BKR ALARM PNL EP3-1 AB 771 D 3 HT PL EP032 EMERG BKR ALARM PNL EP3-2 AB 771 D 3 HT TF 3KTH2 FEEDER TO 208V PNLBD 3KTH2 (600/208V) AB 771 D 3 ICC CA 0001A UNIT 3 ICCM TRAIN A CABINET AB 822 A, B, C, D, E 3 ICC CA 0001B UNIT 3 ICCM TRAIN B CABINET AB 822 A, B, C, D, E 3 ICS CA 0001 ICS CABINET 1 AB 822 A, B, C, D, E 3 ICS CA 0002 ICS CABINET 2 AB 822 A, B, C, D, E 3 ICS CA 0003 ICS CABINET 3 AB 822 A, B, C, D, E 3 ICS CA 0004 ICS CABINET 4 AB 822 A, B, C, D, E 3 ICS CA 0005 ICS CABINET 5 AB 822 A, B, C, D, E 3 ICS CA 0006 ICS CABINET 6 AB 822 A, B, C, D, E 3 ICS CA 0007 ICS CABINET 7 AB 822 A, B, C, D, E 3 ICS CA 0008 ICS CABINET 8 AB 822 A, B, C, D, E 3 ICS CA 0009 ICS CABINET 9 AB 822 A, B, C, D, E 3 ICS -CA 0010 ICS CABINET 10 AB 822 A, B, C, D, E 3 ICS CA 0011 ICS CABINET 11 AB 822 A, B, C, D, E Page 13 of 23

Attachment 1 Ocone A hnit 3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 3 ICS CA 0012 AUXILIARY SYSTEM CABINET #12 AB 822 A, B, C, D, E 3 ICS CA 0013 AUXILIARY SYSTEM CABINET #13 AB 822 A, B, C, D, E 3 ICS CA 0014 AUXILIARY SYSTEM CABINET #14 AB 822 A, B, C, D, E 3 ICS PL ASP AUX SHUTDOWN PANEL TB 822 A, B, C, D, E 3 LP VA 0001 LPI DROPLINE ISOL FROM RCS RB 797 B,D 3 LP VA 0002 LPI DROPLINE ISOL FROM RCS RB 777 D 3 LP VA 0003 LPI HOT LEG SUCTION AB 758 D 3 LP VA 0006 LPI SUCTION CROSSOVER AB 758 D 3 LP VA 0007 LPI SUCTION CROSSOVER AB 758 D 3 LP VA 0008 LPI PUMP 3B SUCTION AB 758 D 3 LP VA 0009 LPI CROSSOVER AB 758 D 3 LP VA 0010 LPI CROSSOVER AB 758 D 3 LP VA 0012 LPI COOLER 3A ISOLATION AB 771 D 3 LP VA 0014 LPI COOLER 3B ISOLATION AB 771 D 3 LP VA 0017 LPI TRAIN 3A INJECTION ISOL AB 809 D 3 LP VA 0018 LPI TRAIN 3B INJECTION ISOL AB 809 D 3 LP VA 0021 BWST SUCTION ISOLATION AB 771 A,B,C,D 3 LP VA 0092 LPI COOLER BYPASS VALVE AB 771 D 3 LP VA 0093 LPI COOLER BYPASS VALVE AB 771 D 3 LP VA 0126 LPI POST ACCIDENT SAMPLE ISOL AB 758 A 3 LPI FT 0004P LPI TRAIN 3B INJ FLOW TRANS (Powered by ICCM) AB 809 D 3 LPI FT 0005P LPI TRAIN 3A INJ FLOW TRANS (Powered by ICCM) AB 809 D 3 LPI HX OOOA LPI COOLER 3A AB 771 D 3 LPI HX 000B LPI COOLER 3B AB 771 D 3 LPI PL 0126 REMOTE STARTER ENCLOSURE FOR 3LP-126 AB 771 A 3 LPI PU 0001 3LPI PUMP A AB 758 D 3 LPI PU 0002 3LPI PUMP B AB 758 D 3 LPI PU 0003 3LPI PUMP C AB 758 D 3 LPI TE 0209 LPI COOLER OUTLET TEMP (ICS Input) AB 809 D 3 LPI TE 0210 LPI COOLER OUTLET TEMP (ICS Input) AB 771 D 3 LPI TK 0001 BWST YD 796 A,B,C 3 LPS FL OOOA LPSW PUMP A STRAINER TB 775 D 3 LPS FL 000B LPSW PUMP B STRAINER TB 775 D 3 LPS FT 0124 LPI COOLER 3A FLOW XMTR (3LPSW-405) AB 771 D 3 LPS FT 0125 LPI COOLER 3B FLOW XMTR (3LPSW-404) AB 771 D 3 LPS FT 1000 DECAY HEAT COOLER A LPSW FLOW AB 771 B,D 3 LPS FT 1001 DECAY HEAT COOLER B LPSW FLOW AB 771 B,D 3 LPS PS 0097 A LPSW HDR PRESS TB 775 D 3 LPS PS 0098 B LPSW HDR PRESS TB 775 D 3 LPS PU 0001 LPSW PUMP 3A TB 775 D 3 LPS PU 0002 LPSW PUMP 3B TB 775 D 3 LPS SV 0202 MOTOR DRIVEN EFDW PUMP MTR 3A COOLING WATER FLOW TB 775 C 3 LPS SV 0203 MOTOR DRIVEN EFDW PUMP MTR 3B COOLING WATER FLOW TB 775 C 3 LPS SV 1000 SOLENOID VALVE FOR 3LPSW-251 AB 783 D Page 14 of 23

Attachment 1

.O. onee Unit 3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 3 LPS SV 1001 SOLENOID VALVE FOR 3LPSW-252 AB 783 D 3 LPS VA 0004 LPI COOLER 3A ISOLATION VALVE AB 783 D 3 LPS VA 0005 LPI COOLER 3B ISOLATION VALVE AB 783 D 3 LPS VA 0018 RBCU 3A RETURN VALVE AB 809 E 3 LPS VA 0021 RBCU 38 RETURN VALVE AB 809 E 3 LPS VA 0024 RBCU 3C RETURN VALVE AB 809 E 3 LPS VA 0139 Nonessential Header Isolation Valve TB 775 D 3 LPS VA 0196 PUMP 3A SEAL FLOW REGULATOR TB 775 D 3 LPS VA 0203 PUMP 3B SEAL FLOW REGULATOR TB 775 D 3 LPS VA 0251 DECAY HEAT COOLER A (3LPSVA0251) AB 783 D 3 LPS VA 0252 DECAY HEAT COOLER B (3LPSVA0252) AB 783 D 3 LPS VA 0516 EFW PUMP 3A LPSW ISOLATION VALVE TB 775 C 3 LPS VA 0525 EFW PUMP 3B LPSW ISOLATION VALVE TB 775 C 3 MS PL 0079 REMOTE STARTER ENCLOSURE FOR 3MS-79 TB 796 D 3 MS PS 0086 MAIN STEAM PRESS SWITCH (3MS-19) TB 796 D 3 MS PS 0087 MAIN STEAM PRESS SWITCH (3MS-22) TB 796 D 3 MS PS 0088 MAIN STEAM PRESS SWITCH (3MS-28) TB 796 D 3 MS PS 0089 MAIN STEAM PRESS SWITCH (3MS-31) TB 796 D 3 MS PT 0024P SG 3A PRESSURE RB 825 D 3 MS PT 0025P SG 3A PRESSURE RB 825 D 3 MS PT 0026P SG 3B PRESSURE RB 825 D 3 MS PT 0027P SG 3B PRESSURE RB 825 D 3 MS PT 1006 AFIS ANALOG CHANNEL 3 - 3A S/G HDR PRESSURE TB 796 D 3 MS PT 1007 AFIS ANALOG CHANNEL 3 - 3B S/G HDR PRESSURE TB 796 D 3 MS PT 1008 AFIS ANALOG CHANNEL 4 - 3A S/G HDR PRESSURE TB 796 D 3 MS PT 1009 AFIS ANALOG CHANNEL 4- 3B S/G HDR PRESSURE TB 796 D 3 MS PY 0042 UNIT 3 UPS (3MSSS0042 - 3MS-87)) AB 796 D 3 MS SV 0074 TD EFDWP STEAM ADMISSION SOLENIOD FOR 3MS-93 TB 775 D 3 MS SV 0178 TURB BYPASS CONTROL VLV A SHUTOFF TB 796 D 3 MS SV 0179 TURB BYPASS CONTROL VLV B SHUTOFF TB 796 D 3 MS SV 0180 TURB BYPASS CONTROL VLV C SHUTOFF TB 796 D 3 MS SV 0181 TURB BYPASS CONTROL VLV D SHUTOFF TB 796 D 3 MS VA 0001 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0002 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0003 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0004 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0005 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0006 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0007 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0008 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0009 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0010 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0011 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0012 MAIN STEAM SAFETY RELIEF AB 809 D Page 15 of 23

Attachment 1 Oconee Unit 3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 3 MS VA 0013 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0014 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0015 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0016 MAIN STEAM SAFETY RELIEF AB 809 D 3 MS VA 0017 TURBINE BYPASS ISOLATION TB 796 D 3 MS VA 0019 TURBINE BYPASS VALVE TB 796 D 3 MS VA 0022 TURBINE BYPASS VALVE TB 796 D 3 MS VA 0024 AS ISOLATION TB 796 D 3 MS VA 0026 TURBINE BYPASS ISOLATION TB 796 D 3 MS VA 0028 TURBINE BYPASS VALVE TB 796 D 3 MS VA 0031 TURBINE BYPASS VALVE TB 796 D 3 MS VA 0033 AS ISOLATION TB 796 D 3 MS VA 0035 FWPT ISOLATION TB 796 D 3 MS VA 0036 FWPT ISOLATION TB 796 D 3 MS VA 0040 FWPT 3A STOP VALVE (MS-40/SV12) TB 775 D 3 MS VA 0043 FWPT 3B STOP VALVE (MS-43/SV12) TB 775 D 3 MS VA 0047 MS TO CSAE TB 796 D 3 MS VA 0076 MS RH ISOLATION TB 796 D 3 MS VA 0077 MS TO 2ND STAGE RHTR ISOL TB 796 D 3 'MS VA 0078 MS TO 2ND STAGE RHTR ISOL TB 796 D 3 MS VA 0079 MS RH ISOLATION TB 796 D 3 MS VA 0080 MS TO 2ND STAGE RHTR ISOL TB 796 D 3 MS VA 0081 MS TO 2ND STAGE RHTR ISOL TB 796 D 3 MS VA 0093 TDEFW MS ISOLATION VALVE TB 775 D 3 MS VA 0095 TD EFDWP GOVERNOR VALVE TB 775 D 3 MS VA 0102 TURBINE STOP VALVE # 4 TB 796 D 3 MS VA 0103 TURBINE STOP VALVE # 3 TB 796 D 3 MS VA 0104 TURBINE STOP VALVE # 2 TB 796 D 3 MS VA 0105 TURBINE STOP VALVE # 1 TB 796 D 3 MS VA 0106 MAIN STEAM CONTROL VALVE TB 796 D 3 MS VA 0107 MAIN STEAM CONTROL VALVE TB 796 D 3 MS VA 0108 MAIN STEAM CONTROL VALVE TB 796 D 3 MS VA 0109 MAIN STEAM CONTROL VALVE TB 796 D 3 MS VA 0112 MS TO 2ND STAGE RHTR ISOL TB 796 D 3 MS VA 0126 MS TO AS CONTROL VALVE TB 796 D 3 MS VA 0129 MS TO AS CONTROL VALVE TB 796 D 3 MS VA 0173 MS TO 2ND STAGE RHTR ISOL TB 796 D 3 N TK 0003 NITROGEN SUPPLY FOR 3FDW-315 & 3FDW-316 AB 838 D 3 N TK 0004 NITROGEN SUPPLY FOR 3FDW-315 & 3FDW-316 AB 838 D 3 N TK 0005 NITROGEN SUPPLY FOR 3MS-87 TB 796 D 3 N TK 0006 NITROGEN SUPPLY FOR 3MS-126 TB 796 D 3 N TK 0007 NITROGEN SUPPLY FOR 3MS-129 TB 796 D 3 PAM CA 0001 POST ACCIDENT LIQUID SAMPLING PANEL AB 771 A 3 PAM LT 0090 RB CONTAINMENT WATER LVL TR A RB 777 A Page 16 of 23

Attachment 1 Oconee Unit 3, SWEL-1, Base 1 Equipment Lift Unit Sys Type Number Description Bldg. FLEL Safety Function 3 PAM LT 0091 RB CONTAINMENT WATER LVL TR B RB 777 A 3 PAM P 0304 RB CONT WATER LVL IND TR A AB 822 A 3 PAM P 0305 RB CONT WATER LVLIND TR B AB 822 A 3 PPS CA 0001 RPS A/ES Al AB 822 A,B,C,D,E 3 PPS CA 0002 RPS A/ES Al AB 822 A, B,C, D,E 3 PPS CA 0003 RPS A/ES B1 AB 822 A,B,C,D,E 3 PPS CA 0004 RPS A/ES BI AB 822 A,B,C,D,E 3 PPS CA 0005 RPS A/ES C1 AB 822 A,B,C,D,E 3 PPS CA 0006 RPS A/ES Cl AB 822 A, B,C, D,E 3 PPS CA 0007 RPS D AB 822 A,B,C,D,E 3 PPS CA 0008 RPS D AB 822 A, B, C, D, E 3 PPS CA 0009 ES A2 AB 822 A, B, C, D, E 3 PPS CA 0010 ES B2 AB 822 A, B, C, D, E 3 PPS CA 0011 ES C2 AB 822 A, B,C, D,E 3 PPS CA 0012 ES VOTER ODD AB 822 A, B,C, D,E 3 PPS CA 0013 ES VOTER ODD AB 822 A, B,C, D,E 3 PPS CA 0014 ES VOTER EVEN AB 822 A,B,C,D,E 3 PPS CA 0015 ES VOTER EVEN AB 822 A,B,C,D,E 3 PPS CA 0016 RPS E/MSI AB 822 A,B,C,D,E 3 PPS CA 0017 ES STATUS ODD AB 822 A, B, C, D, E 3 PPS CA 0018 ES STATUS EVEN AB 822 A, B, C, D, E 3 RBC AH 0020A RBCU FAN 3A RB 825 E 3 RBC AH 0020B RBCU FAN 3B RB 825 *E 3 RBC AH 0020C RBCU FAN 3C RB 825 E 3 RBC HX OOOA RB COOLING UNIT 3A RB 817 E 3 RBC HX OOOAAUX AUX RBCU A RB 844 E 3 RBC HX 000B RB COOLING UNIT 3B RB 817 E 3 RBC HX OOOBAUX AUX RBCU B RB 861 E 3 RBC HX 0OOC RB COOLING UNIT 3C RB 817 E 3 RBC HX OOCAUX AUX RBCU C RB 844 E 3 RBC HX OOODAUX AUX RBCU D RB 844 E 3 RC LT 0004P1 PRZ LEVEL TRANSMITTER RB 797 B,C 3 RC LT 0004P3 PRZ LEVEL TRANSMITTER RB 797 B,C 3 RC LT 0123 3A RCS HOT LEG LVL (ICCM A) AB 809 B 3 RC LT 0124 3B RCS HOT LEG LVL (ICCM B) AB 809 B 3 RC LT 0125 RV HEAD LEVEL (ICCM A) AB 809 B 3 RC LT 0126 RV HEAD LEVEL (ICCM B) AB 809 B 3 RC PL 3RC1 3RC-1 SPRAY VALVE CONTROL BOX AB 796 B 3 RC PT 0017P RCS LOOP A PRESS TRANS RB 825 C 3 RC PT 0021P RC PRESS XMTR (ES CH A) RB 825 B 3 RC PT 0022P RC PRESS XMTR (ES CH B) RB 825 B 3 RC PT 0023P RC PRESS XMTR (ES CH C) RB 825 B 3 RC PT 0166P RCS LOOP B PRESS TRANS RB 825 C 3 RC PT 0225 U3 RC LOOP A PRESSURE RB 797 C,D Page 17 of 23

Attachment 1 Oconee Unit 3, SWEL-1, Base 1 EqUip'ment List Unit Sys Type Number Description Bldg. FLEL Safety Function 3 RC PT 0226 U3 RC LOOP B PRESSURE RB 817 C,D 3 RC PT 0244 WR RCS PRESS TRAIN A (ICCM) AB 809 C,D 3 RC PT 0245 WR RCS PRESS TRAIN B (ICCM) AB 809 C,D 3 RC RD 0005B RCS COLD LEG RTD RB 797 C,D 3 RC RD 0006A RCS COLD LEG RTD RB 797 C,D 3 RC RD 0007B RCS COLD LEG RTD RB 797 C,D 3 RC RD 0008A RCS COLD LEG RTD RB 797 C,D 3 RC RD 0043A PRZ RTD RB 808 B,C 3 RC RD 0043B PRZ RTD RB 808 B,C 3 RC RD 0084A REACTOR OUTLET LOOP 3A RB 844 C,D 3 RC RD 0084B A HOT LEG WIDE RANGE RTD RB 844 C,D 3 RC RD 0085A REACTOR OUTLET LOOP 3B RB 844 C,D 3 RC RD 0085B B HOT LEG WIDE RANGE RTD RB 844 C,D 3 RC SV 0036 RC SAMPLE LINE ISOLATION VALVE (3RC7) AB 822 B 3 RC SV 0206 CONTROLS POST ACC. SAM. VLV(3RC-179) AB 758 A 3 RC VA 0001 PRZ SPRAY ISOLATION VALVE RB 853 C 3 RC VA 0003 PRZ SPRAY ISOLATION RB 853 C 3 RC VA 0004 PRZ PORV BLOCK VALVE RB 853 B,C 3 RC VA 0005 PRZ STEAM SAMPLE ISOLATION RB 808 B 3 RC VA 0006 PRZ WATER SAMPLE ISOLATION RB 808 B 3 RC VA 0007 PRZ WATER SAMPLE ISOLATION AB 809 B 3 RC VA 0066 PRZ PORV RB 853 B,C 3 RC VA 0067 PRZ CODE SAFETY RB 853 B,C 3 RC VA 0068 PRZ CODE SAFETY RB 853 B,C 3 RC VA 0159 RV VENT ISOLATION RB 844 A,B,C 3 RC VA 0160 RV VENT ISOLATION RB 844 A,B,C 3 RC VA 0162 POST ACC SAMPLE PATH ISOL RB 777 A,B 3 RC VA 0163 POST ACC SAMPLE PATH ISOL RB 777 A 3 RC VA 0179 POST ACC SAMPLE TH ROTTLE AB 758 A 3 RPS CA Al RPS CABINET 3A1 AB 822 A, B, C, D, E 3 RPS CA A2 RPS CABINET 3A2 AB 822 A, B, C, D, E 3 RPS CA 81 RPS CABINET 381 AB 822 A, B, C, D, E 3 RPS CA B2 RPS CABINET 382 AB 822 A, B, C, D, E 3 RPS CA Cl RPS CABINET 3C1 AB 822 A, B, C, D, E 3 RPS CA C2 RPS CABINET 3C2 AB 822 A, B, C, D, E 3 RPS CA D1 RPS CABINET 3D1 AB 822 A, B, C, D, E 3 RPS CA D2 RPS CABINET 3D2 AB 822 A, B, C, D, E 3 RPS CA El RPS CABINET 3E1 AB 822 A, B, C, D, E 3 SC HX OOOA GENERATOR WATER COOLER 3A TB 775 D 3 SC HX 0008 GENERATOR WATER COOLER 3B TB 775 D 3 SF TK 0002 INCORE INST HANDLING TANK RB 797 A,C,D 3 SF VA 0082 SPENT FUEL POOL TO RC MAKEUP PUMP BLOCK RB 777 B 3 SF VA 0097 SPENT FUEL POOL TO RC MAKEUP PUMP BLOCK RB 784 B 3 SSW FT 1011 ESV PUMP 3A SEAL WATER FLOW TRANSMITTER ESV 797 D Page 18 of 23

Attachment 1 Oconee Unit 3, SWEL-1, Base rEquipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 3 SSW FT 1012 ESV PUMP .3B SEAL WATER FLOW TRANSMITFER ESV 797 D 3 SSW FT 1013 ESV PUMP 3C SEAL WATER FLOW TRANSMITTER ESV 797 D 3 SSW VA 0109 CCWP SEAL WATER REG. VALVE INT 796 D 3 SSW VA 0119 CCWP SEAL WATER REG. VALVE INT 796 D 3 SSW VA 0129 CCWP SEAL WATER REG. VALVE INT 796 D 3 SSW VA 0139 CCWP SEAL WATER REG. VALVE INT 796 D 3 SSW VA 0155 ESV PUMP SEAL SUPPLY VALVE ESV 797 D 3 SSW VA 0156 ESV PUMP SEAL SUPPLY VALVE ESV 797 D 3 SSW VA 0157 ESV PUMP SEAL SUPPLY VALVE ESV 797 D 3 SYD BK PCB28 230KV AC POWER CIRCUIT BREAKER 28 (PCB-28) SYD 770 A, B, C, D, E 3 SYD BK PCB30 230KV AC POWER CIRCUIT BREAKER 30 (PCB-30) SYD 770 A, B, C, D, E 3 TO PU 0022 EFWPT AUX OIL PUMP TB 775 C 3 TO TK 0002 EFW PUMP TURBINE OIL TANK TB 775 C 3 TO TN TBEH3A FWPT 3A MAIN OIL TANK TERM BOX EH TB 775 D 3 TO TN TBEH3B FWPT 3B MAIN OILTANKTERM BOX EH TB 775 D 3 TO VA 0059 EFW PUMP TURBINE OIL PR VALVE TB 775 C 3 VS AH 0013 AHU-3-13 AB 838 A 3 VS AH 0014 AHU-3-14 AB 838 A 3 VS AH 0026 OUTSIDE AIR BOOSTER FAN 'A' (F3-8) AB 838 A 3 VS AH 0027 OUTSIDE AIR BOOSTER FAN 'B' (F3-9) AB 838 A KG ELK BD CB05 CONTROL BOARD 05 KEO 688 A, B, C, D, E KG ELK BD CB06 CONTROL BOARD 06 KEO 688 A, B, C, D, E KG ELK BS OHXPHASE KHU OVERHEAD BUS X PHASE TO 230 KV SWITCHYARD KEO 702 A, B, C, D, E KO ELK BS OHYPHASE KHU OVERHEAD BUS Y PHASE TO 230 KV SWITCHYARD KEO 702 A, B, C, D, E KO ELK BS OHZPHASE KHU OVERHEAD BUS Z PHASE TO 230 KV SWITCHYARD KEO 702 A, B, C, D, E KO ELK PL EB5 ELEC BOARD 05 KEO 688 A,B,C,D,E KO ELK PL EB6 ELEC BOARD 06 KEO 688 A, B, C, D, E KO ELK SX CX KEOWEE XFMR CX DISC SW KEO 702 A, B, C, D, E KO ELK TF 0001 MAIN TRANSFORMER KEO 702 A, B, C, D, E KO ELK TF CX TRANSFORMER CX KEO 702 A, B, C, D, E K1 AG TK 0001 AIR RECEIVER TANK KEO 683 A, B, C, D, E KI CO PS 063F GEN 1 C02 RELEASE PRESS SWITCH (63F/PS2_1) KEO 683 A, B, C, D, E K1 CO SV 20F1 GEN I C02 RELEASE VALVE KEO 683 A, B, C, D, E K1 CO SV 20F2 GEN 1 C02 RELEASE VALVE KEO 683 A, B, C, D, E KI CO SV 20P1 GEN 1 C02 CYL RELEASE VALVE (MAIN BANK) KEO 702 A, B, C, D, E K1 CO SV 20P2 GEN 1 C02 CYL RELEASE VALVE (MAIN BANK) KEO 702 A, B, C, D, E KI ELK BA KB1 BATT BANK 1 KEO 675 A, B, C, D, E KI ELK BC KC1 BATT CHARGER 1 (KC-1) KEO 675 A, B, C, D, E K1 ELK BD CB01 CONTROL BOARD 01 KEO 688 A, B, C, D, E Ki ELK BD CB02 CONTROL BOARD 02 KEO 688 A, B, C, D, E K1 ELK BD CB03 CONTROL BOARD 03 KEO 688 A, B, C, D, E K1 ELK BD CB04 CONTROL BOARD 04 KEO 688 A, B, C, D, E KI ELK BS GENACB13 13.8 KV BUS FROM GEN #1 TO ACB1 AND ACB3 KEO 702 A, B, C, D, E K1 ELK BS MTFACB1 13.8 KV BUS FROM ACB1 TO MAIN XFMR KEO 702 A, B, C, D, E Page 19 of 23

Attachment 1 Oconee Unit 3, SWEL-I.fase 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function K1 ELK CA 0103 TERMINAL BOX 103 (WIRING ONLY) KEO 675 A, B, C, D, E K1 ELK CA 0127 TERMINAL BOX 127 KEO 683 A, B, C, D, E K1 ELK CA iLC1 LOGIC CABINET 1 KEO 688 A, B, C, D, E K1 ELK CA 1LC2 LOGIC CABINET 2 KEO 688 A, B, C, D, E K1 ELK CA 1LC3 LOGIC CABINET 3 KEO 688 A, B, C, D, E K1 ELK CA 1MTC1 Ul MISC TERM CAB 1MTC1 KEO 675 A, B, C, D, E Ki ELK CA 1MTC2 Ul MISC TERM CAB 1MTC2 KEO 675 A, B, C, D, E K1 ELK MX IXA 600V AC MCC IXA KEO 683 A, B, C, D, E Ki ELK PL 1DA 125V DC DIST CENTER 1DA KEO 675 A, B, C, D, E K1 ELK PL lEC1 EXC CUBICLE 1 KEO 702 A, B, C, D, E K1 ELK PL 1EC2 EXC CUBICLE 2 KEO 702 A, B, C, D, E K1 ELK PL 1EC3 EXC CUBICLE 3 KEO 702 A, B, C, D, E K1 ELK PL 1EC4 EXC CUBICLE 4 KEO 702 A, B, C, D, E K1 ELK PL lEC5 EXC CUBICLE 5 KEO 702 A, B, C, D, E K1 ELK PL 1TGP1 TURBINE GAUGE PANEL (UNIT 1) KEO 683 A, B, C, D, E K1 ELK PL EB1 ELEC BOARD 01 KEO 688 A, B, C, D, E Ki ELK PL EB2 ELEC BOARD 02 KEO 688 A, B, C, D, E K1 ELK PL EB3 ELEC BOARD 03 KEO 688 A, B, C, D, E KI ELK PL EB4 ELEC BOARD 04 KEO 688 A, B, C, D, E KI ELK PL EFBP1 EMERGENCY FEEDER BREAKER NO. 1 KEO 702 A, B, C, D, E K1 ELK PL GBP GENERATOR BREAKER PANEL KEO 702 A, B, C, D, E K1 ELK PL KA 120V AC PPB KA KEO 683 A, B, C, D, E K1 ELK PL MODP MOTOR OPERATED DISCONNECT PANEL KEO 702 A, B, C, D, E Ki ELK SH 1X 600V AC SWGR 1X KEO 702 A, B, C, D, E K1 ELK SX 1E Ul XFMR 1E DISC SW KEO 702 A, B, C, D, E K1 ELK SX 1X TRANSFORMER 1X DISCONNECT SWITCH KEO 702 A, B, C, D, E Ki ELK TF 1E EXCITATION TRANSFORMER 1E KEO 702 A, B, C, D, E K1 ELK TF lx 600V AC SWGR 1X TRANSFORMER KEO 702 A, B, C, D, E K1 ELK TN 0101 TERMINAL BOX 101 KEO 683 A, B, C, D, E Ki ELK TN 0102 TERMINAL BOX 102 KEO 683 A, B, C, D, E Ki ELK TN 0109 TERMINAL BOX 109 KEO 683 A, B, C, D, E K1 ELK TN 0113 TERMINAL BOX 113 (WIRING ONLY) KEO 683 A, B, C, D, E KI ELK TN 0121 TERMINAL BOX 121 (WIRING ONLY) KEO 683 A, B, C, D, E K1 ELK TN 0123 TERMINAL BOX 123 (WIRING ONLY) KEO 683 A, B, C, D, E Ki GA HX 0001 GEN AIR COOLER 1 KEO 695 A, B, C, D, E K1 GA HX 0002 GEN AIR COOLER 2 KEO 695 A, B, C, D, E Ki GA HX 0003 GEN AIR COOLER 3 KEO 695 A, B, C, D, E K1 GA HX 0004 GEN AIR COOLER 4 KEO 695 A, B, C, D, E K1 GA HX 0005 GEN AIR COOLER 5 KEO 695 A, B, C, D, E K1 GA HX 0006 GEN AIR COOLER 6 KEO 695 A, B, C, D, E Ki GBO HX 0001 TURB GUIDE BRNG OIL COOLER KEO 667 A, B, C, D, E K1 GBO LS 63TA TURB GUIDE BRNG OIL LEVEL SWITCH (1GBOLT0001) KEO 675 A, B, C, D, E K1 GBO LS 63TB TURB GUIDE BRNG OIL LEVEL SWITCH (1GBOLT0002) KEO 675 A, B, C, D, E K1 GBO PU 088A AC BRNG OIL PUMP (88A) KEO 667 A, B, C, D, E Page 20 of 23

Attachment 1 Oconee Unit 3,,SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function.

K1 GBO PU 088D DC BRNG OIL PUMP (88D) KEO 667 A, B, C, D, E K1 GCS CA SS1A GOVERNOR SPEED CONTOL CABINET SS1A KEO 667 A, B, C, D, E KI GCS CA SS1B GOVERNOR SPEED CONTOL CABINET SS1B KEO 667 A, B, C, D, E K1 GEN GN 0001 KEOWEE UNIT 1 GENERATOR KEO 683 A, B, C, D, E K1 GEN PC GPC1 GEN POT CUBICLE UNIT 1 (1 PER PHASE) KEO 702 A, B, C, D, E K1 GEN PL BPC1 BUS POT CUBICLE UNIT 1 (1 PER PHASE) KEO 702 A, B, C, D, E K1 GEN PL NEUCUB NEUTRAL CUBICLE 1 KEO 683 A, B, C, D, E K1 HPO HX 0001 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0002 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0003 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0004 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0005 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E KI HPO HX 0006 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0007 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO HX 0008 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K1 HPO LS 63BLH LEVEL SWITCH (1HPOLS0001) KEO 683 A, B, C, D, E KI HPO LS 63BLL LEVEL SWITCH (1HPOLS0002) KEO 683 A, B, C, D, E K1 HPO PU 88HA AC GEN HP LIFT PUMP (88HA) KEO 675 A, B, C, D, E K1 HPO PU 88HD DC GEN HP LIFT PUMP (88HD) KEO 675 A, B, C, D, E K1 MT PS 0009 TURBINE PIT PRESS SWITCH KEO 675 A, B, C, D, E K1 MT TR 0001 KEOWEE UNIT 1 TURBINE KEO 702 A, B, C, D, E K1 OG TK 0001 GOVERNOR ACTUATOR KEO 683 A, B, C, D, E K1 OG TK 0002 GOVERNOR OIL SUMP TANK KEO 683 A, B, C, D, E K1 OG TK 0003 GOVERNOR OIL PRESS TANK KEO 683 A, B, C, D, E KI PMG DT MPULA SPEED CONTROL MAGNETIC PICKUP 1A KEO 667 A, B, C, D, E K1 PMG DT MPU1B SPEED CONTROL MAGNETIC PICKUP 1B KEO 667 A, B, C, D, E K1 PMG DT MPUIC SPEED CONTROL MAGNETIC PICKUP 1C KEO 667 A, B, C, D, E K1 TS LS 63SA TURB SUMP LEVEL SWITCH (1TSLS0001) KEO 675 A, B, C, D, E K1 TS LS 63SB TURB SUMP LEVEL SWITCH (1TSLS0002) KEO 675 A, B, C, D, E K1 TS PU 88SA AC SUMP PUMP (88SA) KEO 675 A, B, C, D, E K1 TS PU 88SD DC SUMP PUMP (88SD) KEO 675 A, B, C, D, E KI WL VA 0011 GEN COOL ISOL VALVE (1WL-11) KEO 683 A, B, C, D, E K2 AG TK 0001 AIR RECEIVER TANK KEO 683 A, B, C, D, E K2 CO PS 063F GEN 2 C02 RELEASE PRESS SWITCH (63F/PS2_2) KEO 683 A, B, C, D, E K2 CO SV 20F3 GEN 2 C02 RELEASE VALVE KEO 683 A, B, C, D, E K2 CO SV 20F4 GEN 2 C02 RELEASE VALVE KEO 683 A, B, C, D, E K2 CO SV 20P3 GEN 2 C02 CYL RELEASE VALVE (RESERVE BANK) KEO 702 A, B, C, D, E K2 CO SV 20P4 GEN 2 C02 CYL RELEASE VALVE (RESERVE BANK) KEO 702 A, B, C, D, E K2 ELK BA KB2 BATT BANK 2 KEO 675 A, B, C, D, E K2 ELK BC KC2 BATT CHARGER 2 (KC-2) KEO 675 A, B, C, D, E K2 ELK BD CB07 CONTROL BOARD 07 KEO 688 A, B, C, D, E K2 ELK BD CB08 CONTROL BOARD 08 KEO 688 A, B, C, D, E K2 ELK BD CB09 CONTROL BOARD 09 KEO 688 A, B, C, D, E K2 ELK BD CB1O CONTROL BOARD 10 KEO 688 A, B, C, D, E Page 21 of 23

Attachment 1 Oconee Uiiff3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FL EL Safety Function K2 ELK BS GENACB24 13.8 KV BUS FROM GEN #2 TO ACB2 AND ACB4 KEO 702 A, B, C, D, E K2 ELK BS MTFACB2 13.8 KV BUS FROM ACB2 TO MAIN XFMR KEO 702 A, B, C, D, E K2 ELK CA 2LC1 LOGIC CABINET 1 KEO 688 A, B, C, D, E K2 ELK CA 2LC2 LOGIC CABINET 2 KEO 688 A, B, C, D, E K2 ELK CA 2LC3 LOGIC CABINET 3 KEO 688 A, B, C, D, E K2 ELK CA 2MTC1 U2 MISC TERM CAB 2MTC1 KEO 675 A, B, C, D, E K2 ELK CA 2MTC2 U2 MISC TERM CAB 2MTC2 KEO 675 A, B, C, D, E K2 ELK MX 2XA 600V AC MCC 2XA KEO 683 A, B, C, D, E K2 ELK PL 2DA 125V DC DIST CENTER 2DA KEO 675 A, B, C, D, E K2 ELK PL 2EC1 EXC CUBICLE 1 KEO 702 A, B, C, D, E K2 ELK PL 2EC2 EXC CUBICLE 2 KEO 702 A, B, C, D, E K2 ELK PL 2EC3 EXC CUBICLE 3 KEO 702 A, B, C, D, E K2 ELK PL 2EC4 EXC CUBICLE 4 KEO 702 A, B, C, D, E K2 ELK PL 2EC5 EXC CUBICLE 5 KEO 702 A, B, C, D, E K2 ELK PL 2TGP1 TURBINE GAUGE PANEL (UNIT 2) KEO 683 A, B, C, D, E K2 ELK PL EBIO ELEC BOARD 10 KEO 688 A, B, C, D, E K2 ELK PL EB7 ELEC BOARD 07 KEO 688 A, B, C, D, E K2 ELK PL EB8 ELEC BOARD 08 KEO 688 A, B, C, D, E K2 ELK PL EB9 ELEC BOARD 09 KEO 688 A, B, C, D, E K2 ELK PL EFBP2 EMERGENCY FEEDER BREAKER NO. 2 KEO 702 A, B, C, D, E K2 ELK PL GBP GENERATOR BREAKER PANEL KEO 702 A, B, C, D, E K2 ELK PL KB 120V AC PPB KB KEO 683 A, B, C, D, E K2 ELK PL MODP MOTOR OPERATED DISCONNECT PANEL KEO 702 A, B, C, D, E K2 ELK SH 2X 600V AC SWGR 2X KEO 702 A, B, C, D, E K2 ELK SX 2E U2 XFMR 2E DISC SW KEO 702 A, B, C, D, E K2 ELK SX 2X TRANSFORMER 2X DISCONNECT SWITCH KEO 702 A, B, C, D, E K2 ELK TF 2E EXCTIATION TRANSFORMER 2E KEO 702 A, B, C, D, E K2 ELK TF 2X 13.8KV/600V AC SWGR 2X TRANSFORMER KEO 702 A, B, C, D, E K2 ELK TN 0201 TERM BOX TB-201 KEO 683 A, B, C, D, E K2 ELK TN 0202 TERM BOX TB-202 KEO 683 A, B, C, D, E K2 ELK TN 0203 TERM BOX TB-203 KEO 675 A, B, C, D, E K2 ELK TN 0227 TERM BOX TB-227 KEO 683 A, B, C, D, E K2 GA HX 0001 GEN AIR COOLER 1 KEO 667 A, B, C, D, E K2 GA HX 0002 GEN AIR COOLER 2 KEO 667 A, B, C, D, E K2 GA HX 0003 GEN AIR COOLER 3 KEO 667 A, B, C, D, E K2 GA HX 0004 GEN AIR COOLER 4 KEO 667 A, B, C, D, E K2 GA HX 0005 GEN AIR COOLER 5 KEO 667 A, B, C, D, E K2 GA HX 0006 GEN AIR COOLER 6 KEO 667 A, B, C, D, E K2 GBO HX 0001 TURB GUIDE BRNG OIL COOLER KEO 667 A, B, C, D, E K2 GBO LS 63TA TURB GUIDE BRNG OIL LEVEL SWITCH (2GBOLTOO01) KEO 675 A, B, C, D, E K2 GBO LS 63TB TURB GUIDE BRNG OIL LEVEL SWITCH (2GBOLTO002) KEO 675 A, B, C, D, E K2 GBO PU 088A AC BRNG OIL PUMP (88A) KEO 667 A, B, C, D, E K2 GBO PU 088D DC BRNG OIL PUMP (88D) KEO 667 A, B, C, D, E K2 GCS CA SS2A GOVERNOR SPEED CONTOL CABINET SS2A KEO 667 A, B, C, D, E Page 22 of 23

Attachment 1 Oc6i1e Unit 3, SWEL-1, Base 1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function K2 GCS CA SS2B GOVERNOR SPEED CONTOL CABINET SS2B KEO 667 A, B, C, D, E K2 GEN GN 0001 KEOWEE UNIT 2 GENERATOR KEO 683 A, B, C, D, E K2 GEN PC GPC2 GEN POT CUBICLE UNIT 2 (1 PER PHASE) KEO 702 A, B, C, D, E K2 GEN PL BPC2 BUS POT CUBICLE UNIT 2 (1 PER PHASE) KEO 702 A, B, C, D, E K2 GEN PL NEUCUB NEUTRAL CUBICLE 2 KEO 683 A, B, C, D, E K2 HPO HX 0001 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0002 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0003 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0004 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0005 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E

-K2 HPO HX 0006 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0007 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO HX 0008 GEN THRUST BRNG COOLER KEO 667 A, B, C, D, E K2 HPO LS 63BLH LEVEL SWITCH (2HPOLS0001) KEO 683 A, B, C, D, E K2 HPO LS 63BLL LEVEL SWITCH (2HPOLS0002) KEO 683 A, B, C, D, E K2 HPO PU 88HA AC GEN HP LIFT PUMP (88HA) KEO 675 A, B, C, D, E K2 HPO PU 88HD DC GEN HP LIFT PUMP (88HD) KEO 675 A, B, C, D, E K2 MT PS 0009 TURB PIT PRESS SWITCH KEO 675 A, B, C, D, E K2 MT TR 0001 KEOWEE UNIT 2 TURBINE KEO 683 A, B, C, D, E K2 OG TK 0001 GOVERNOR ACTUATOR KEO 683 A, B, C, D, E K2 OG TK 0002 GOVERNOR OIL SUMP TANK KEO 683 A, B, C, D, E K2 OG TK 0003 GOVERNOR OIL PRESS TANK KEO 683 A, B, C, D, E K2 PMG DT MPU1A SPEED CONTROL MAGNETIC PICKUP 1A KEO 667 A, B, C, D, E K2 PMG DT MPUIB SPEED CONTROL MAGNETIC PICKUP 1B KEO 667 A, B, C, D, E K2 PMG DT MPUIC SPEED CONTROL MAGNETIC PICKUP 1C KEO 667 A, B, C, D, E K2 TS LS 63SA TURB SUMP LEVEL SWITCH (2TSLSO001) KEO 675 A, B, C, D, E K2 TS LS 63SB TURB SUMP LEVEL SWITCH (2TSLS0002) KEO 675 A, B, C, D, E K2 TS PU 88SA AC SUMP PUMP (88SA) KEO 675 A, B, C, D, E K2 TS PU 88SD DC SUMP PUMP (885D) KEO 675 A, B, C, D, E K2 WL VA 0011 GEN COOL ISOL VALVE (2WL-11) KEO 683 A, B, C, D, E Page 23 of 23

Attachment 2 Oconee Unit 3, SWEL-1 Equipment Litr Unit Sys Type Number Description Bldg. FL EL Safety Function 0 DA TK 000C DIESEL STARTING AIRTANK C SSF 777 B,C 0 EL CA SYTC1 SWYD TERMINAL CABINET 01 SYD 770 A, B, C, D, E 0 EL SH BIT05 SK1 CT4 TO STDBY BUS 1 FDR BKR SECTION BH1 796 A, B, C, D, E 0 EL TF OCT4 XFMR CT-4 BH3 796 A, B, C, D, E 0 FO TK 0003 SSF DIESEL OIL DAY TANK SSF 777 B,C 0 SSF BA DCSF DCSF SSF NORMAL BATTERY SSF 777 A, B, C, D, E 0 SSF MX XSF MCC XSF(600V) SSF 777 A, B, C, D, E 0 SSF SH OTS1 OTS1 SSF ESSENTIAL SWGR 4160V SSF 777 A, B, C, D, E 0 SYD BC SY2 230KV SWYD BATTERY CHARGER SY2 SYD 770 A, B, C, D, E 0 SYD BD RB02 SWITCHYARD RELAY BOARD RB02 SYD 770 A, B, C, D0,E 0 SYD BD RF17 SWITCHYARD RELAY BOARD RF17 SYD 770 A, B, C, D, E 0 SYD BD SRF17 SWITCHYARD RELAY BOARD SRF17 SYD 770 A, B, C, D, E 0 SYD BK PCB08 230KV AC POWER CIRCUIT BREAKER 08 (PCB-08) SYD 770 A, B, C, D, E 0 SYD PL DYC DC PANELBOARD C SYD 770 A, B, C, D, E 0 SYD PL DYE DC PANELBOARD E SYD 770 A, B, C, D, E 0 SYD PL SYDC1 SWITCHYARD DISTRIBUTION CENTER 1 SYD 770 A, B, C, D, E 0 SYD TF RBPT RED BUS POTENTIAL TRANSFORMER (EGPS) SYD 770 A, B, C, D, E 0 VS AH 0042 AHU 0-42 HEATING AND A/C SSF BUILDING SSF 817 B,C 0 VS AH 0044EX6 SSF ON LINE EXHAUST FAN & MOTOR SSF 817 B,C 0 VS DA CDO1 SSF CONSTANT VENTILATION (VS-AH-0044EX1) EXHAUST FAN DAMPER SSF 817 B,C 0 VS PS SSFPS03 SSF ON-LINE VENTILATION SYSTEM SUPPLY FAN SSF 822 A, B, C, D, E 0 VS TT SSFCT2 HVAC TEMPERATURE CONTROLLER (FOR SSF-CP-1) SSF 822 A, B, C, D, E 3 BAG BD 3AB3 CONTROL BOARD 3AB3 AB 822 A, B, C, D, E 3 BS VA 0004 RBS PUMP SUCTION ISOL AB 758 E 3 C DM 00OB POLISHING DEMINERALIZER 3B TB 775 D 3 C LT 0036 UST 3A LEVEL TB 838 D 3 C PS 0227 CONDENSATE BOOSTER PUMP SUCTION HEADER PRESS LOW TB 775 D 3 C TK 0003 SLURRY TANK TB 775 D 3 C TK 000C UPPER SURGE TANK DOME TB 838 D 3 CC PL 0287 REMOTE STARTER ENCLOSURE FOR 3CCW-287 SSF 758 D 3 CC VA 0268 SSF ASW PUMP DISCH ISOL SSF 754 D 3 CRD CA CC2 CONTROL CABINETCC-2 AB 809 A 3 CRD CA CC5 CONTROL CABINET CC-5 AB 809 A 3 CS VA 0005 QUENCH TANK DRAIN RB 777 A, B, C 3 EHC CA EHC1 EHCCAB3EHC1 AB 809 D 3 EL BA 3CA CONTROL BATT 3CA AB 809 A, B, C, D, E 3 EL BA 3PA PWR BATT 3PA TB 796 A, B, C, D, E 3 EL BC 3CA CONTROL BATT CHGR 3CA AB 796 A, B, C, D, E 3 EL BC 3PA PWR BATT CHGR 3PA TB 796 A, B, C, D, E 3 EL BI 3DIC 120V STATIC INV 3DIC AB 796 A, B, C, D, E 3 EL BK 3A 240/120V 3A REGULATOR OUTPUT BKR AB 796 A, B, C, D, E 3 EL CA 3EB1 ELECTRICAL BOARD 3EB1 AB 822 A, B, C, D, E 3 EL CA 3MTC3 MISC TERM CAB 3MTC3 AB 809 A, B, C, D, E 3 EL CA 3TTC4 TURB TERM CAB 3TTC4 TB 796 A, B, C, D, E Page 1 of 3

Attachment 2 Oconee Unit 3, SWEL-1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 3 EL CA SGLC3 STEAM GEN LOGIC CABINET AB 809 A, B, C, D, E 3 EL IR MC33 INSTRUMENT RACK 3MC-33 TB 775 D 3 EL LX 3X2 600V LC 3X02 TB 796 A, B, C, D, E 3 EL LX 3X8 600V LC 3X08 AB 796 A, B, C, D, E 3 EL MX 3XAA 208V MCC 3XA-A TB 796 D 3 EL MX 3XGB MCC 3XGB TB 796 D 3 EL MX 3XJ 600V MCC 3XJ AB 809 D 3 EL MX 3XL MCC 3XL AB 771 A, B, C 3 EL MX 3XO MCC 3XO AB 796 A, B, C, D, E 3 EL MX 3XS2 MCC 3XS2 AB 796 A, B, C, D, E 3 EL MX 3XT MCC 3XT AB 838 D 3 EL PL 3CPS 3 POWDEX PANEL TB 775 D 3 EL PL 3EPSLP2 EPSL PANEL 3EPSLP2 AB 809 A, B, C, D, E 3 EL PL 3KRA 120V PPB 3KRA AB 809 A, B, C, D, E 3 EL PL 3SKJ 208/120V PPB 3SKJ AB 809 A, B, C, D, E 3 EL PL 3TCPA TURB CONT PANEL 3TCPA TB 796 A, B, C, D, E 3 EL SH 3BIT02 RELAYS SECTION BH3 796 A, B, C, D, E 3 EL SH 3TC01 3TC BUS 1 INCOMING FDR BKR SECTION TB 796 A, B, C, D, E 3 EL SX 3KXBKU P BACKUP TRANSFER SWITCH 3KX AB 796 A, B, C, D, E 3 EL TF 3XGA XFMR 3XGA (600V TO 208V) TB 796 A, B, C, D, E 3 EL TF 3XT XFMR 3XT (600V TO 208V) AB 838 A, B, C, D, E 3 EL TN 2345 TERMINAL BOX TB-2345 AB 809 B 3 EL TN 2353 TERMINAL BOX TB-2353 TB 796 D 3 ES CA 3ESTC1 ESFAS ODD CH TERM CAB 3ESTC1 AB 809 A, B, C, D, E 3 ESV PL 0001 UNIT 3 ESV LOCAL CONTROL PANEL ESV 797 D 3 ESV PT 0002 ESV TANK PRESSURE TRANSMITFER ESV 797 D 3 ESV TF 0003 600/240/120V 3SKN POWER TRANSFORMER ESV 797 D 3 FD FT 0153 3A EFW HEADER FLOW TRANSMITTER AB 783 D 3 FD LT 0082 SG 3A LEVEL TRANSMITTER RB 777 D 3 FD PL 0368 REMOTE STARTER ENCLOSURE FOR 3FDW-368 AB 809 D 3 FD PS 0383 FWPT 3A CONTROL OIL PRESS SWITCH TB 775 D 3 FD PU 0003 TDEFW PUMP TB 775 D 3 FD VA 0086 PRESS REG TD PUMP SEALS TB 775 D 3 FD VA 0218 PRESS REG TD PUMP SEALS TB 775 D 3 HP VA 0004 LETDOWN ISOLATION RB 777 B 3 HPI EP 0075 RCP SEAL INJECTION FLOW AB 783 B 3 HPI FT 0157 U3 RC MAKE UP PUMP FLOW RB 777 B 3 HPI HX 000B LETDOWN COOLER 3B RB 777 B 3 HPI HX O01A RC SEAL RETURN COOLER 3A AB 771 B 3 HPI PL 0409 REMOTE STARTER ENCLOSURE FOR 3HP-409 AB 796 A,B,C 3 HPI PS 0357 LETDOWN FLOW TEMP HIGH INTERLOCK AB 783 B 3 HPI PU 0003 HPI PUMP 3C AB 758 A,B,C 3 LP VA 0021 BWST SUCTION ISOLATION AB 771 A,B,C,D 3 LPI PU 0001 3LPI PUMP A AB 758 D Page 2 of 3

Attachment 2 Oconee Unit 3, SWEL-1 Equipment List Unit Sys Type Number Description Bldg. FLEL Safety Function 3 LPS FL 000B LPSW PUMP B STRAINER TB 775 D 3 LPS PU 0001 LPSW PUMP 3A TB 775 D 3 LPS SV 0203 MOTOR DRIVEN EFDW PUMP MTR 3B COOLING WATER FLOW TB 775 C 3 MS PS 0088 MAIN STEAM PRESS SWITCH (3MS-28) TB 796 D 3 MS PT 1007 AFIS ANALOG CHANNEL 3 - 3B S/G HDR PRESSURE TB 796 D 3 MS VA 0031 TURBINE BYPASS VALVE TB 796 D 3 MS VA 0036 FWPT ISOLATION TB 796 D 3 MS VA 0043 FWPT 3B STOP VALVE (MS-43/SV12) TB 775 D 3 MS VA 0093 TDEFW MS ISOLATION VALVE TB 775 D 3 PPS CA 0001 RPS A/ES Al AB 822 A, B, C, D, E 3 PPS CA 0012 ES VOTER ODD AB 822 A, B, C, D, E 3 PPS CA 0018 ES STATUS EVEN AB 822 A, B, C, D, E 3 RBC AH 0020C RBCU FAN 3C RB 825 E 3 RBC HX OOOA RB COOLING UNIT 3A RB 817 E 3 RC LT 0004P1 PRZ LEVEL TRANSMITTER RB 797 B,C 3 RC LT 0123 3A RCS HOT LEG LVL (ICCM A) AB 809 B 3 RC PL 3RC1 3RC-1 SPRAY VALVE CONTROL BOX AB 796 B 3 RC PT 0022P RC PRESS XMTR (ES CH B) RB 825 B 3 RC PT 0226 U3 RC LOOP B PRESSURE RB 817 C,D 3 RC RD 0084A REACTOR OUTLET LOOP 3A RB 844 C,D 3 RC VA 0066 PRZ PORV RB 853 B,C 3 RC VA 0159 RV VENT ISOLATION RB 844 A,B,C 3 SC HX O00B GENERATOR WATER COOLER 3B TB 775 D 3 SF TK 0002 INCORE INST HANDLING TANK RB 797 A,C,D 3 TO VA 0059 EFW PUMP TURBINE OIL PR VALVE TB 775 C 3 VS AH 0014 AHU-3-14 AB 838 A KO ELK TF 0001 MAIN TRANSFORMER KEO 702 A, B, C, D, E K1 CO SV 20P2 GEN 1 C02 CYL RELEASE VALVE (MAIN BANK) KEO 702 A, B, C, D, E K1 ELK BA KB1 BATTBANK1 KEO 675 A, B, C, D, E KI ELK BD CBO1 CONTROL BOARD 01 KEO 688 A, B, C, D, E K1 ELK CA 1MTC1 U1 MISC TERM CAB 1MTC1 KEO 675 A, B, C, D, E Ki ELK MX IXA 600V AC MCC iXA KEO 683 A, B, C, D, E KI ELK TN 0109 TERMINAL BOX 109 KEO 683 A, B, C, D, E K1 OG TK 0003 GOVERNOR OIL PRESS TANK KEO 683 A, B, C, D, E K1 PM DT MPU1A SPEED CONTROL MAGNETIC PICKUP 1A KEO 667 A, B, C, D, E K1 WL VA 0011 GEN COOL ISOL VALVE (2WL-11) KEO *683 A, B, C, D, E K2 ELK BC KC2 BATT CHARGER 2 (KC-2) KEO 675 A, B, C, D, E K2 ELK CA 2MTC1 U2 MISC TERM CAB 2MTC1 KEO 675 A, B, C, D, E K2 ELK PL 2DA 125V DC DIST CENTER 2DA KEO 675 A, B, C, D, E K2 ELK TN 0203 TERM BOX TB-203 KEO 675 A, B, C, D, E K2 GA HX 0003 GEN AIR COOLER 3 KEO 667 A, B, C, D, E K2 HPO PU 88HA AC GEN HP LIFT PUMP (88HA) KEO 675 A, B, C, D, E K2 TS LS 63SB TURB SUMP LEVEL SWITCH (2TSLS0002) KEO 675 A, B, C, D, E Page 3 of 3

Attachment 3 Oconee Unit 3, SWEL-2,, Base-2 and Rapid Drawdown List Safety EQO. ID Description SYs EQ. Class BLDG Col # Elev Room # Function 05/Horizonal Aux. SF Pool 3SFPU0001 3A SF Pump SF Pump Building 783' 9" 255 Cooling 05/Horizonal Aux. SF Pool 3SFPU0002 3B SF Pump SF Pump Building 783' 9" 255 Cooling BWST Recirculation 06/Vertical Aux. SF Pool 3SFPU0004 Pump SF Pump Building 783' 9" 255 Cooling 05/Horizonal Aux. SF Pool 3SFPU0003 3C SF Pump SF Pump Building 783' 9" 255 Cooling 21/Heat Aux. SF Pool 3SFHXOOOA A SF Cooler SF Exchanger Building 783' 9" 255 Cooling 21/Heat Aux. SF Pool 3SFHXOOOB B SF Cooler SF Exchanger Building 783' 9" 255 Cooling 21/Heat Aux. SF Pool 3SFHXOOOC C SF Cooler SF Exchanger Building 783' 9" 255 Cooling 21/Tank-heat Aux SF Pool 3SFFLOOOA 3A SF Filter SF exchanger Building 783' 9" 254 Cooling 21/Tank-heat Aux SF Pool 3SFFLOOOB 3B SF Filter SF exchanger Building 783' 9" 254 Cooling 21/Tank-heat Aux SF Pool 3SFDMOO01 3 SF Demin SF exchanger Building 783' 9" 254 Cooling Page 1 of 1

Attachment 4 Oconee Unit 3, SWEL-2 List Safety EQ. ID Description S EQ. Class BLDG Col # Elev Room # Function 05/Horizonal Aux. SF Pool 3SFPU0001 3A SF Pump SF Pump Building 783' 9" 255 Cooling 05/Horizonal Aux. SF Pool 3SFPU0002 3B SF Pump SF Pump Building 783' 9" 255 Cooling 05/Horizonal Aux. SF Pool 3SFPU0003 3C SF Pump SF Pump Building 783' 9" 255 Cooling 21/Heat Aux. SF Pool 3SFHXOOOA A SF Cooler SF Exchanger Building 783' 9" 255 Cooling 21/Heat Aux. SF Pool 3SFHX000B B SF Cooler SF Exchanger Building 783' 9" 255 Cooling 21/Heat Aux. SF Pool 3SFHX000C CSF Cooler SF Exchanger Building ____ 783' 9" 255 Cooling Page 1 of 1

United States Nuclear Regulatory Commission Seismic Walkdown Report November 27, 2012 Enclosure 4 List of Voluntary Regulatory Commitments The following commitment table identifies those actions committed to by Duke Energy Carolinas, LLC (Duke Energy) in this submittal. Other actions discussed in the submittal represent intended or planned actions by Duke Energy. They are described to the Nuclear Regulatory Commission (NRC) for the NRC's information and are not regulatory commitments.

Contained in the NRC endorsed EPRI document (EPRI 1025286) that provides guidance to satisfy the NRC requested information are the following statements:

Section 8, Submittal Report: For those cases where some SWEL items were inaccessible within the 180-day reporting period, an updated submittal report should be submitted later.

Appendix H, Item d: Provide a schedule for completing any licensing basis evaluations not finished by the time the report of this program must be submitted to the NRC.

Therefore, the following voluntary commitments are being made to satisfy the EPRI Guidance:

Commitment Completion Date Duke Energy will submit an update report after walkdowns 1 of the ONS Unit 1, and common, inaccessible components July 1, 2013 described in Enclosure 1 are complete.

Duke Energy will submit an update report after walkdowns 2 of the ONS Unit 2 inaccessible components described in April 15, 2014 Enclosure 2 are complete.

Duke Energy will submit an update report after walkdowns 3 of the ONS Unit 3 inaccessible components described in September 1, 2014 Enclosure 3 are complete.

(Note: Inaccessible items that are common to all 3 units are listed in all 3 enclosures but will be walked down and reported in the Unit 1 update report only.)

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