Text

Inservice Testing Program Description: Safety-Related Seismic Restraints (Snubbers) for the Third 10-Year Interval
	ML110810657
Person / Time
Site:	South Texas
Issue date:	03/14/2011
From:	Ruvalcaba M; South Texas
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	NOC-AE-11002651
	Download: ML110810657 (59)
	v • d • e

Nuclear Operating Company South Texas Pro/ectElectric GeneratmIn Station PO Box 289 Wadsworth. Texas 77483 March 14, 2011 NOC-AE-1 1002651 File No.: G25 10 CFR 50.55a U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852 South Texas Project Units 1 & 2 Docket Nos. STN 50-498, STN 50-499 Inservice Testing Program

Description:

Safety-Related Seismic Restraints (Snubbers) for the Third 10-Year Interval

Reference:

Marco Ruvalcaba, STP Nuclear Operating Company, to NRC Document Control Desk, "Inservice Testing Program

Description:

Safety-Related Seismic Restraints (Snubbers) for the Third 10-Year Interval," dated July 13, 2010 (NOC-AE-10002565) (ML102010290)

Pursuant to 10 CFR 50.55a(g), STP Nuclear Operating Company (STPNOC) updated the South Texas Project Inservice Testing (IST) snubber program for the third 10-year interval applicable to safety-related seismic restraints (snubbers) as noted in the referenced correspondence. The IST snubber program plan describes the programmatic aspects for snubber inservice testing implemented with the third 10-year interval beginning September 25, 2010. STPNOC submits the attached program description in accordance with section ISTA-3200 of the ASME OM Code, 2004 Edition, no addenda.

The IST snubber program plan is written in accordance with the requirements of the ASME OM Code, 2004 Edition, No Addenda, Subsections ISTA and ISTD with the inspection requirements of Code Case OMN-13, Revision 0. The IST snubber program plan complies with the applicable limitations and modifications as stated in 10 CFR 50.55a(b) related to implementation of the 2004 ASME OM Code. Therefore, NRC approval is not required prior to implementation.

There are no commitments included with this submittal.

If there are any questions, please contact either Mr. P. L. Walker at (361) 972-8392 or me at (361) 972-7904.

/Marco Ruivalcab Manager, Testing and Programs Engineering PILW

Attachment:

Unit 1 and 2 Snubber Inservice Test Plan STI: 32837946

NOC-AE-1 1002651 Page 2 of 2 cc:

(paper copy) (electronic copy)

transmittal letter only *transmittal letter only Regional Administrator, Region IV *John Ragan U. S. Nuclear Regulatory Commission *Catherine Callaway 612 East Lamar Blvd., Suite 400 *Jim von Suskil Arlington, Texas 76011-8064 NRG South Texas LP Balwant K. Singal *A. H. Gutterman, Esquire Senior Project Manager Morgan, Lewis & Bockius LLP U.S. Nuclear Regulatory Commission One White Flint North (MS 8B1) 11555 Rockville Pike *Balwant K. Singal Rockville, MD 20852 U. S. Nuclear Regulatory Commission Senior Resident Inspector *Richard Pena U. S. Nuclear Regulatory Commission *E. Alarcon P. O. Box 289, Mail Code: MN116 *Kevin Polio Wadsworth, TX 77483 City Public Service

C. M. Canady *C. Mele City of Austin City of Austin Electric Utility Department 721 Barton Springs Road *Peter Nemeth Austin, TX 78704 Crain Caton & James, P.C.

Richard A. Ratliff Texas Department of State Health Services

Alice Rogers Texas Department of State Health Services

SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION INSERVICE TESTING PROGRAM UNIT 1 AND 2 SNUBBER INSERVICE TEST PLAN THIRD TEN-YEAR INTERVAL SOUTH TEXAS PROJECT UNITS I AND 2 DOCKET NOS. STN 50-498, STN 50-499 FACILITY OPERATING LICENSE NOS. NPF-76/80 COMMERCIAL OPERATING DATES Unit 1: 8/25/1988 Unit 2: 6/19/1989 THIRD TEN-YEAR INTERVAL DATES 9/25/2010 THROUGH 9/24/2020

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit I and 2 Snubber Inservice Test Plan REVISION 0

SUMMARY

SHEET SECTION EFFECTIVE CHANGE PAGE(S)

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan TABLE OF CONTENTS SECTION DESCRIPTION PAGE

1.0 INTRODUCTION

1 1.1 Overview 1 1.2 Program Test Plan 1 2.0 SCOPE 2 2.1 Overview 2 2.2 Code Classification 2 2.3 Snubber IST Listing 3 2.4 Implementing Processes [Acceptance Criteria / 3 Test or Examination Methods / Frequency or Schedule 2.5 Applicable Documents [P&IDs / Procedures] 4 3.0 METHOD OF EVALUATING SNUBBERS 13 4.0 ALTERNATIVE REQUIREMENTS TO OM CODE 14 4.1 Code Cases 14 4.2 10CFR50.55a Requirements - Code Cases 14 4.3 Code Case Adoption 15 4.4 Relief Requests 17 4.5 50.55a Limitations, Modifications and 18 Clarifications Revision 0 ii

SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan TABLE OF CONTENTS SECTION DESCRIPTION PAGE 5.0 INTERPRETATIONS TO THE OM CODE 19 6.0 PROGRAM IMPLEMENTATION 19 7.0 PROGRAM CONFIGURATION CONTROL 20 8.0 TEST PLAN ATTACHMENTS 20 Unit 1 Snubber IST Listing Unit 2 Snubber IST Listing Snubber Code Cases - Information Only Snubber Interpretation - Information Only Revision 0 iii

SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan

1.0 INTRODUCTION

1.1 Overview 10CFR50.55a and the South Texas Project (STP) Technical Requirements Manual invoke inservice testing (IST) of Snubbers per ASME OM Code (Code of Operation and Maintenance of Nuclear Power Plants). Part 50.55a establishes the requirements that each nuclear power plant must develop and implement an inservice inspection and testing program. Inservice tests are used to verify operational readiness of Snubbers whose function is required for safety. The tests conducted during successive 120-month intervals must comply with the requirements of the latest edition and addenda of the OM Code that is in effect 12 months prior to the start of the interval.

Title 10, Part 50.55a of the Code of Federal Regulations invoke, by reference, the requirement for inservice inspection (ISI) of Snubbers per Section XI of the ASME Boiler and Pressure Vessel Code.

STP begins its third IST 10-year interval of commercial plant operation for Unit I & 2 on September 25, 2010 and ends on September 24, 2020.

The Snubber Inservice Test Plan was developed in accordance with the requirements of IOCFR50.55a that became effective on October 15, 2008.

The edition and addenda of the ASME OM Code for the Snubber IST Program for the third 10-year interval is the 2004 Edition No Addenda, Subsections ISTA & ISTD [the Code].

1.2 Program Test Plan Since the period of time that the requirement for inservice testing was first incorporated into the Code of Federal Regulations; the NRC, ASME, and the nuclear industry have provided additional interpretations to the Code requirements. These interpretations have been documented through various mechanisms such as 10CFR50.55a Final Rules, Code Cases, Code Interpretations, generic letters, program review meetings, site inspections, and others. It is the intent of the Program Plan to:

0 Establish a set criteria and philosophy for determining the Snubber Testing Scope,

Evaluate each plant Snubber in a consistent manner to identify which Snubbers SHOULD be included in the testing program and to identify the extent,

Identify Alternative requirements to the Code,

Identify implementation processes of testing required for each snubber, and implementing documents.

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan 2.0 SCOPE 2.1 Overview The scope of the Snubber IST Program includes those Snubbers that are required to perform a specific function in shutting down the reactor to a safe shutdown condition, in maintaining the safe shutdown condition, or in mitigating the consequences of an accident.

This program was developed to encompass system safety requirements defined in 10 CFR 50 as well as Snubber functions required in response to the abnormal operational transients and accidents defined in the UFSAR. The program is not limited to the postulated accidents of UFSAR Chapter 15. The UFSAR, Technical Specifications, and related design basis documents are the primary references used to determine which Snubbers are required to perform specific functions related to the spectrum of postulated accidents.

The only snubbers excluded from this program are those installed on nonsafety-related systems, and then only if their failure or failure of the system on which they are installed would have no adverse effect on any safety-related system.

2.2 Code Classification The quality group classification system for water, steam, and radioactive waste containing components important to the safety of water-cooled nuclear power plants is established by NRC Regulatory Guide 1.26, in conjunction with 10CFR50.55a. Regulatory Guide 1.26, "Quality Group Classification and Standards", defines the Quality Group Classification System consisting of four Quality Groups, A through D. Quality Group A is defined as "Reactor Coolant Pressure Boundary" (Class 1) by I0CFR50.2. The definitions of Groups B, C, and D (Class 2, Class 3 and non-classed, respectively) are provided by Regulatory Guide 1.26.

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan 2.3 Snubber IST Listing The Snubber IST Listing was previously known as the Snubber Index prior to invoking ASME OM Code. The Snubber IST Listing is maintained as the Snubber Database, which is an electronic database containing component test and inspection history, acceptance criteria, and references.

The Snubber Database is used to identify snubbers to be tested in accordance with the requirements of the Code. The Snubber Database contains, as a minimum, the following information about each Snubber:

Snubber identification (Snubber number, model number, and serial number)

Applicable plant system

ASME Code class (same as Quality Group Classifications in R.G. 1.26)

Snubber location information

Test or examination method

Test and examination history Reference Attachment 1 (Unit I Snubber IST Listing) & Attachment 2 (Unit 2 Snubber IST Listing) for a listing of snubbers tested and examined in accordance with this plan.

The listing provides basic information about the scoped snubbers.

2.4 Implementing Processes Program inservice tests required by the Code SHALL be implemented using the Surveillance Test Program process. The Surveillance Test Program provides acceptance criteria for the tests and examinations. As a result of the performed tests, any identified corrective actions and subsequent retests SHALL be made per the requirements of the Code and the ASME Section XI Repair/Replacement Program.

In conjunction with the Surveillance Test Program process, other STP site documents detail Code requirements and implementation processes [test or examination methods and frequency or schedule].

The Condition Reporting (CR) process at STP provides a method to document material deficiencies and engineering evaluations required to comply with the Code. Work orders initiated by the CR process will be used to implement corrective maintenance on snubbers identified for Inservice Testing and will allow for recording and tracking component history.

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan 2.5 Applicable Documents The details of the Snubber IST Program referenced in this Test Plan are contained in documents that are available at STP. These documents include, but are not limited to, piping and instrumentation diagrams, piping isometric drawings, component support drawings, and procedures that support implementation of the Snubber IST program.

2.5.1 Piping and Instrumentation Diagrams (P&IDS)

This section provides a listing of the various piping and instrumentation diagrams applicable to the Snubber IST Program. Table 1 provides a listing of the piping systems containing Class 1, 2, or 3 snubbers, and applicable Instrumentation Diagrams (P&ID's) for these Class 1, 2, and 3 piping systems. Table 1 is arranged in alphabetical system abbreviation.

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan Table 1 Piping and Instrumentation Diagrams System System Drawing Sheet Abbr. Designation Number No. Drawing Title AF Auxiliary Feedwater 5S141F00024 1 Auxiliary Feedwater 5S141F00024 2 Auxiliary Feedwater 5S142F00024 1 Auxiliary Feedwater 5S142F00024 2 Auxiliary Feedwater 5S199F00020#1 Condensate Storage System (Note 1) 5S199F00020#2 Condensate Storage System (Note 1)

AP Post Accident Sampling 5Z549Z47501#1 Post Accident Sampling System 5Z549Z47501#2 Post Accident Sampling System 5Z I69Z00046# 1 Containment Hydrogen Monitoring System (Note 2) 5Z 169Z00046#2 Containment Hydrogen Monitoring System (Note 2)

BA Breathing Air 5Q129F05044#1 Low Pressure Breathing Air System (Note 3) 5Q129F05044#2 Low Pressure Breathing Air System (Note 3)

CC Component Cooling 5R209F05017#1 Component Cooling Water System 5R209F05017#2 Component Cooling Water System 5R209F05018#1 Component Cooling Water System 5R209F05018#2 Component Cooling Water System 5R209F05019#1 Component Cooling Water System 5R209F05019#2 Component Cooling Water System 5R209F05020#1 Component Cooling Water System Revision 0 Page 5 of 20

SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit I and 2 Snubber Inservice Test Plan Table 1 (Cont'd.)

Piping and Instrumentation Diagrams System System Drawing Sheet Abbr. Designation Number No. Drawing Title 5R209F05020#2 Component Cooling Water System 5R209F05021#1 Component Cooling Water System 5R209F05021#2 Component Cooling Water System CH Essential Chilled Water 5V119V10001#1 Essential Chilled Water System 5V 119V10001#2 Essential Chilled Water System 3V 119V10002#1 Essential Chilled Water System 3VI 19V10002#2 Essential Chilled Water System 3V 119V10003#1 Essential Chilled Water System 3VI 19V10003#2 Essential Chilled Water System 3V 119V 10004# 1 Essential Chilled Water System 3VI 19V 10004#2 Essential Chilled Water System CM Containment Hydrogen 5Z 169Z00046#1 Containment Hydrogen Monitoring System Monitoring 5Z 169Z00046#2 Containment Hydrogen Monitoring System CS Containment Spray 5N109F05037#1 Containment Spray System 5N109F05037#2 Containment Spray System 5N129F05013#1 Safety Injection System (Note 4) 5N129F05013#2 Safety Injection System (Note 4) 5N129F05014#1 Safety Injection System (Note 4)

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan Table 1 (Cont'd.)

Piping and Instrumentation Diagrams System System Drawing Sheet Abbr. Designation Number No. Drawing Title 5N 129F05014#2 Safety Injection System (Note 4) 5N129F05015#1 Safety Injection System (Note 4) 5N 129F05015#2 Safety Injection System (Note 4)

CV Chemical and Volume 5R179F05005#1 Chemical & Volume Control System Control 5R179F05005#2 Chemical & Volume Control System 5R179F05006#1 Chemical & Volume Control System 5R179F05006#2 Chemical & Volume Control System 5R179F05007#1 Chemical & Volume Control System 5R179F05007#2 Chemical & Volume Control System 5R179F05008#1 Chem & Vol Control Sys BTRS Sub Sys 5R179F05008#2 Chem & Vol Control Sys BTRS Sub Sys 5RI79F05009#1 Chemical & Volume Control System 5RI79F05009#2 Chemical & Volume Control System DI Standby Diesel Generator 5Q 159F22543# 1 Diesel Air Intake & Exhaust Systems Combustion Air Intake 5Q 159F22543#2 Diesel Air Intake & Exhaust Systems DO Standby Diesel Generator 5Q159F00045#1 1 Sdby Gen Fuel Oil Stor & Trans System Fuel Oil

_5Q159F00045#1 2 Sdby Gen Fuel Oil Stor & Trans System Revision 0 Page 7 of 20

SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan Table 1 (Cont'd.)

Piping and Instrumentation Diagrams System System Drawing Sheet Abbr. Designation Number No. Drawing Title 5Q159F00045#2 1 Sdby Gen Fuel Oil Stor & Trans System 5Q159F00045#2 2 Sdby Gen Fuel Oil Stor & Trans System DW Demineralized Water 5S199F05034#1 Demin Water Dist Sys RCB FHB & MEAB (Note 3) 5S199F05034#2 Demin Water Dist Sys RCB FHB & MEAB (Note 3)

DX Standby Diesel Generator 5Q159F22543#1 Diesel Air Intake & Exhaust Systems Combustion Gas Exhaust 5Q 159F22543#2 Diesel Air Intake & Exhaust Systems ED Radioactive Vents and 5Q069F05030#1 Radioactive Vents And Drains System (Note 3)

Drains 5Q069F05030#2 Radioactive Vents And Drains System (Note 3)

EW Essential Cooling Water 5Q159F22541#1 Standby Diesel Gen Sys Cooling Water (Note 5) 5Q159F22541#2 Standby Diesel Gen Sys Cooling Water (Note 5) 5R289F05038#1 1 Essential Cooling Water System - TRN 1A 5R289F05038#1 2 Essential Cooling Water System - TRN lB 5R289F05038#1 3 Essential Cooling Water System - TRN 1C 5R289F05038#2 1 Essential Cooling Water System - TRN 2A 5R289F05038#2 2 Essential Cooling Water System - TRN 2B 5R289F05038#2 3 Essential Cooling Water System - TRN 2C 5R289F05039#1 Essential Cooling Water System Revision 0 Page 8 of 20

SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan Table 1 (Cont'd.)

Piping and Instrumentation Diagrams System System Drawing Sheet Abbr. Designation Number No. Drawing Title 5R289F05039#2 Essential Cooling Water System FC Spent Fuel Pool Cooling 5R219F05028#1 Spent Fuel Pool Cooling & Cleanup Sys 5R219F05028#2 Spent Fuel Pool Cooling & Cleanup Sys 5R219F05029#1 Spent Fuel Pool Cooling & Cleanup Sys 5R219F05029#2 Spent Fuel Pool Cooling & Cleanup Sys FP Fire Protection 5Q279F05047#1 FH,IVC, Contmnt Bldg Fire Protection Sys (Note 3) 5Q279F05047#2 FH,IVC, Contmnt Bldg Fire Protection Sys (Note 3)

FW Feedwater 5S139F00062#1 Feedwater System 5S 139F00062#2 Feedwater System 5S139F00063# 1 Feedwater System 5S139F00063#2 Feedwater System HC Containment Building 5V149V00018#1 Containment Bldg. HVAC System Normal Purge (Note 3)

HVAC 5V 149V00018#2 Containment Bldg. HVAC System Normal Purge (Note 3) 5V149V00019#1 Containment Bldg. HVAC System Supplementary Purge (Note 3) 5V149V00019#2 Containment Bldg. HVAC System Supplementary Purge (Note 3)

IA Instrument Air 5Q119F05040#1 Fuel Hndlng Bldg & RCB Inst Air System (Note 3) 5Q119F05040#2 Fuel Hndlng Bldg & RCB Inst Air System (Note 3)

IL Integrated Leak Test 5C560F05058 Containment Leak Rate Test Pressurization System (Note 3)

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan Table 1 (Cont'd.)

Piping and Instrumentation Diagrams System System Drawing Sheet Abbr. Designation Number No. Drawing Title JW Standby Diesel Generator 5Q159F22540#1 Standby Diesel Generator Sys Jacket Water Jacket Water 5Q159F22540#2 Standby Diesel Generator Sys Jacket Water LU Standby Diesel Generator 5Q159F22542#1 Standby Diesel Generator Sys Lube Oil Lube Oil 5Q159F22542#2 Standby Diesel Generator Sys Lube Oil MS Main Steam 5S109F00016#1 Main Steam System 5S109F00016#2 Main Steam System 5S141F00024 1 Auxiliary Feedwater (Note 6) 5S141F00024 2 Auxiliary Feedwater (Note 6) 5S142F00024 1 Auxiliary Feedwater (Note 6) 5S142F00024 2 Auxiliary Feedwater (Note 6)

PO Reactor Coolant Pump Oil 5R379F05042#1 Reactor C/P Oil Changing System (Note 3)

Change-Out 5R379F05042#2 Reactor C/P Oil Changing System (Note 3)

PS Primary Sampling 5Z329Z00045#1 Primary Sampling System 5Z329Z00045#2 Primary Sampling System RA Radiation Monitoring 5V149V00017#1 HVAC React. Cntmnt Bldg. Sys. Composite (Note 7) 5V149V00017#2 HVAC React. Cntmnt Bldg. Sys. Composite (Note 7)

RC Reactor Coolant 5R149F05001#1 RCS Primary Coolant Loop Revision 0 Page 10 of 20

SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan Table 1 (Cont'd.)

Piping and Instrumentation Diagrams System System Drawing Sheet Abbr. Designation Number No. Drawing Title 5R149F05001#2 RCS Primary Coolant Loop 5R149F05003#1 RCS Pressurizer 5R149F05003#2 RCS Pressurizer 5R I49F05004# 1 RCS Pressurizer Relief Tank 5R149F05004#2 RCS Pressurizer Relief Tank RD Reactor Coolant System 5R349F05046#1 RCS Vacuum Degassing System (Note 3)

Degassing 5R349F05046#2 RCS Vacuum Degassing System (Note 3)

RH Residual Heat Removal 5R169F20000#1 Residual Heat Removal System 5R169F20000#2 Residual Heat Removal System RM Reactor Makeup Water 5R279F05033#1 Reactor Makeup Water System 5R279F05033#2 Reactor Makeup Water System SA Station Air 5Q109F05041#1 FHB & RCB Service Air System (Note 3) 5Q109F05041#2 FHB & RCB Service Air System (Note 3)

SB Steam Generator Blowdown 5S209F20001#1 Steam Generator Blowdown System 5S209F20001#2 Steam Generator Blowdown System SD Standby Diesel Generator 5Q159F22546#1 Standby Diesel Starting Air System Starting Air 5Q 159F22546#2 Standby Diesel Starting Air System SI Safety Injection 5N129F05013#1 Safety Injection System Revision 0 Page 11 of 20

SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan Table 1 (Cont'd.)

Piping and Instrumentation Diagrams System System Drawing Sheet Abbr. Designation Number No. Drawing Title 5N129F05013#2 Safety Injection System 5N129F05014#1 Safety Injection System 5N 129F05014#2 Safety Injection System 5N129F05015#1 Safety Injection System 5N 129F05015#2 Safety Injection System 5N129F05016#1 Safety Injection System 5N129F05016#2 Safety Injection System SL Steam Generator Sludge 5S209F05057#1 Stm Gen Sludge Lancing & Chem Cleaning Sys Lancing (Note 3) 5S209F05057#2 Stm Gen Sludge Lancing & Chem Cleaning Sys (Note 3)

WL Liquid Waste Processing 5R309F05022#1 Liquid Waste Processing System (Note 3) 5R309F05022#2 Liquid Waste Processing System (Note 3)

Notes: 1. Includes AF piping.

2. Includes AP piping.

3. Class 2 containment penetration piping and isolation valves only.

4. Includes CS piping.

5. Includes EW piping.

6. Includes MS piping.

7. Includes RA piping; Class 2 containment penetration piping and isolation valves only.

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan 2.5.2 Procedures Table 2 lists applicable Snubber IST Program procedures.

Table 2 Snubber Program Procedures PROCEDURE PROCEDURE TITLE NUMBER OPGP03-ZE-0009 Snubber Testing Program OPSP11-SN-0001 Mechanical Snubber Visual Examination (surveillance procedure)

OPSP1 1-SN-0002 Hydraulic Snubber Visual Inspection (surveillance procedure)

OPSP 11 -SN-0003 Mechanical Snubbers Functional Test (surveillance procedure)

OPSP 11-SN-0004 Hydraulic Snubber Functional Test (surveillance procedure)

OPSP1 1-SN-0005 Snubber Service Life Review and Reevaluation (surveillance procedure) 3.0 METHOD OF EVALUATING SNUBBERS The Master Equipment Database and system design basis documents were reviewed to determine which systems include snubbers that encompass system safety requirements defined in 10 CFR 50 as well as snubbers required in response to the abnormal operational transients and accidents defined in the UFSAR. This review was not limited to the postulated accidents of UFSAR Chapter 15.

Each system was reviewed in the following manner:

The P&ID for each system was reviewed to identify the system boundaries for each class of snubbers that are subject to a specific function in shutting down a reactor to the safe shutdown condition, maintaining the safe shutdown condition, or in mitigating the consequences of an accident.

Each snubber was reviewed for design and installation arrangement for allowances for adequate access and clearances for conduct of tests.

The Snubber IST Listing was developed from the above review activities.

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan 4.0 ALTERNATIVE REQUIREMENTS TO OM CODE This section lists the alternative requirements to the Code for specific portions of the Snubber IST Program. The alternative requirements identified meet the rules for alternative requirements that are .defined in the Code.

4.1 Code Cases Code Cases to be used during a preservice or inservice test examinations SHALL be identified in the Test Plan [ISTA 3130(a)].

Code Cases SHALL be applicable to the edition and addenda specified in the Test Plan [ISTA 3130(b)].

Code Cases SHALL be in effect at the time the test plan is filed [ISTA 3130(c)].

Code Cases issued subsequent to filing the Test Plan MAY be proposed for use in amendments to the Test Plan [ISTA 3130(d)].

Superseded Code Cases approved for use MAY continue to be used [ISTA 3140].

Code Cases approved for use MAY be used after annulment for the duration of the Test Plan [ISTA 3150].

Endorsement of Regulatory Guide 1.192 "Operation and Maintenance Code Case Acceptability, ASME OM Code", does NOT commit the STP to all code cases listed therein, but rather allows for selection of applicable code cases. The purpose of this endorsement is to identify all code cases that could potentially be incorporated into this IST Program Plan.

4.2 10CFR50.55a Requirements - Code Cases 10CFR50.55a(b)(6) addresses the application of Code Cases and states the following criteria:

Licensees MAY apply the ASME Operation and Maintenance Nuclear Power Plants Code cases listed in Regulatory Guide 1.192 without prior NRC approval subject to the following:

When a licensee initially applies a listed Code case, the licensee SHALL apply the most recent version of that Code case.

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan If a licensee has previously applied a Code case and a later version of the Code case is incorporated, the licensee MAY continue to apply, to the end of the current 120-month interval, the previous version of the Code case as authorized or MAY apply the later version of the Code case, including any NRC-specified conditions placed on its use Application of an annulled Code case is prohibited unless a licensee previously applied the listed Code case prior to it being listed as annulled in Regulatory Guide 1.192. If a licensee has applied a listed Code case that is later listed as annulled in Regulatory Guide 1.192, the licensee MAY continue to apply the Code case to the end of the current 120-month interval.

4.3 Code Case Adoption:

4.3.1 Adoption of Code Cases Accepted for Generic Use in Regulatory Guide 1.192 Code cases that are designated "Acceptable" or "Conditionally Acceptable" for generic use in Regulatory Guide 1.192 (latest revision) have been adopted for use by listing them in Table 3. All conditions or limitations delineated in Regulatory Guide 1.192 for applicable code cases will apply.

4.3.2 Adoption of Code Cases Not Accepted for Generic Use in Regulatory Guide 1.192 via Submittal of Relief Requests Adoption of code cases that have been approved by the ASME Board of Nuclear Codes and Standards, but that have NOT been accepted for generic use in Regulatory Guide 1.192, MAY be submitted in the form of a relief request in accordance with 10CFR50.55a(a)(3). Once approved, these relief requests will be available for use by STP. The Relief Request is approved for use until the end of the 10-year interval in which it was approved.

Table 4 lists those code cases for which relief requests have been submitted. In addition to the requirements stated in the code cases, criteria MAY be stipulated in the relief request OR MAY be agreed upon through subsequent correspondence with the NRC. STP will implement these additional requirements as applicable.

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan Table 3 Adopted Code Cases Approved in Regulatory Guide 1.192 Code Affected Case Code Case Title Program Number Area OMIN- 13 Requirements for Extending Snubber Inservice Visual Snubber visual exams Examination Interval at LWR Power Plants Table 4 Code Cases Submitted Through Relief Requests Code (1) Relief Request No. Affected Case Code Case Title (2) Correspondence No. Program Number (3) Relief Request Date Area NONE (1)

(2) 1(3)

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan 4.4 Relief Requests Relief from the requirements of the OM Code SHALL be requested where full compliance with the Code will not be achieved. Relief requests are submitted to the NRC for approval pursuant to the requirements of 10 CFR 50.5 5a.

Table 5 provides a listing of additional relief requests, not associated with a code case, that have been written in accordance with I OCFR50.55a(a)(3) when specific inservice testing requirements are considered impractical. If other examination requirements are determined to be impractical during the course of the interval, relief requests SHALL be submitted in accordance with 10CFR50.55a.

Table 5 Relief Requests Not Associated With a Code Case (1) Relief Request No. Affected Relief Request Subject (2) Correspondence No. Program (3) Relief Request Date Area NONE (1)

(2)

(3)

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan 4.5 50.55a Limitations, Modifications and Clarifications Certain paragraphs in 10CFR50.55a list the limitations, modifications, and/or clarifications to the implementation requirements of the Code. The paragraphs in 10CFR50.55a applicable to STP are listed in Table 6.

TABLE 6 CODE OF FEDERAL REGULATIONS 10CFR50.55a LIMITATIONS 10CFR50.55a Paragraphs Limitations, Modifications, and Clarifications 10CFR50.55a(b)(3)(v) Subsection ISTD. Article IWF-5000, "Inservice Inspection Requirements for Snubbers," of the ASME BPV Code,Section XI, provides inservice inspection requirements for examinations and tests of snubbers at nuclear power plants. Licensees MAY use Subsection ISTD, "Inservice Testing of Dynamic Restraints (Snubbers) in Light-Water Reactor Power Plants," ASME OM Code, 1995 Edition through the latest edition and addenda incorporated by reference in paragraph (b)(3) of this section, in place of the requirements for snubbers in Section XI, IWF-5200(a) and (b) and IWF-5300(a) and (b), by making appropriate changes to their technical specifications or licensee-controlled documents. Preservice and inservice examinations must be performed using the VT-3 visual examination method described I in IWA-2213.

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan 5.0 INTERPRETATIONS TO THE OM CODE This section lists interpretations to the Code for specific portions of the Snubber IST Program.

Code interpretations provide clarification to the intent of Code requirements. Although the NRC agrees with most interpretations, some are inconsistent with NRC requirements. NRC requirements SHALL be met. Interpretations serve to support the users understanding of Code requirements. Many interpretations address specific circumstances. Therefore, the context of the interpretation must be thoroughly understood prior to its application at STP.

Code interpretations applicable to Snubber IST Program are listed in Table 7.

TABLE 7 OM CODE INTERPRETATIONS Interpretation Interpretation Description / Subject Application No. Impact 04-10 ASME Code- 1998 through OMb-2000 Snubber testin 6.0 PROGRAM IMPLEMENTATION The Snubber Testing Program procedure (OPGP03-ZE-0009) details program implementation based on the Code and alternate requirements of the Code.

Snubber program inservice tests required by the Code SHALL be implemented using the Surveillance Test Program. The snubber surveillance test program SHALL be used to identify the test method for verifying operational readiness of the snubber, to identify the frequency of the required tests, to establish plant conditions for performing tests, and to document the results of snubber testing. The surveillance tests act as the record of testing required by the Code.

Reference Table 2 for a listing of the applicable snubber ITS program implementing procedures.

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION Unit 1 and 2 Snubber Inservice Test Plan 7.0 PROGRAM CONFIGURATION CONTROL As a minimum the program will be reviewed and revised as necessary for compliance with the Code in effect as referenced by 10CFR50.55a 12 months prior to the end of the third 120-month interval of commercial operation. Additionally, the scope of the program is subject to revision due to changes in system design, changes in design that affect the snubber safety function, or revisions to the applicable code requirements through Alternate Requirements to the Code. In order to accommodate these changes STP reserves the right to submit program revisions that will enhance or improve the program at any time within the effective interval.

8.0 TEST PLAN ATTACHMENTS Attachment 1, Unit 1 Snubber IST Listing Attachment 2, Unit 2 Snubber IST Listing Attachment 3, Code Cases - Information Only Attachment 4, Interpretations - Information Only Revision 0 Page 20 of 20

ATTACHMENT 1 Unit 1 Snubber IST Listing Revision 0

Unit-1 Snubber IST Listing Pages 1 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg 2C11 1XSNO001A HYD-1300KIP 2 RCB SGA-NE 58 400290-0001O0XX 400290--00010XX 0957-0100008WN 2C11 lXSNO001B HYD-1300KIP 2 RCB SGB-N/E 58 400290-0001 0XX 400290--00010XX 0957-0100008WN 2C111XSN0001C HYD-1300KIP 2 RCB SGC-N/E 58 400290-0001 OXX 400290--00010XX 0957-0100008WN 2C11 1XSNO001D HYD-1300KIP 2 RCB SGD-N/E 58 400290-0001 OXX 400290--00010XX 0957-0100008WN 2C11 1XSNO002A HYD-1300KIP 2 RCB SGA-N/W 58 400290-0001 OXX 400290--00010XX 0957-0100008WN 2C11 1XSN0002B HYD-1300KIP 2 RCB SGB-N/W 58 400290-0001 OXX 400290--00010XX 0957-0100008WN 2C111XSNO002C HYD-1300KIP 2 RCB SGC-N/W 58 400290-0001 OXX 400290--00010XX 0957-0100008WN 2C11 XSNO002D HYD-1300KIP 2 RCB SGD-N/W 58 400290-0001 OXX 400290--00010XX 0957-0100008WN 2C11 XSN0003A HYD-1300KIP 2 RCB SGA-S/W 58 400290-0001 0XX 400290--00010XX 0957-0100008WN 2C11 1XSN0003B HYD-1300KIP 2 RCB SGB-S/W 58 400290-00010OXX 400290--00010XX 0957-0100008WN 2C11 1XSNO003C HYD-1300KIP 2 RCB SGC-S/W 58 400290-00010OXX 400290--00010XX 0957-0100008WN 2C11 XSNO003D HYD-1300KIP 2 RCB SGD-S/W 58 400290-00010OXX 400290--00010XX 0957-0100008WN 2C11 1XSNO004A HYD-1300KIP 2 RCB SGA-S/E 58 400290-00010OXX 400290--00010XX 0957-0100008WN 2C11 lXSNO004B HYD-1300KIP 2 RCB SGB-S/E 58 400290-0001 0XX 400290--00010XX 0957-0100008WN 2C11 1XSNO004C HYD-1300KIP 2 RCB SGC-S/E 58 400290-00010OXX 400290--00010XX 0957-0100008WN 2C11 lXSN0004D HYD-1300KIP 2 RCB SGD-S/E 58 400290-0001 OXX 400290--00010XX 0957-0100008WN AF1006HL5003 AD5501 2 RCB SGAD>52' 19 AF9006HL5003 2C369PAF402-02 F00024 AF1006HL5015 AD5501 2 RCB SGAD>52' 19 AF9006HL5015 2C369PAF402-02 F00024 AF1006HL5018 AD5501 2 RCB OMB >19' 19 AF9006HL5018 2C369PAF402-02 F00024 AF1006HL5035N AD5501 2 RCB SGAD>68' 19 AF9006HL5035 2C369PAF402-02 F00024 AF1006HL5035S AD5501 2 RCB SGAD>68' 19 AF9006HL5035 2C369PAF402-02 F00024 AF1008HL5028 AD5501 2 RCB SGAD>68' 19 AF9008HL5028 2C369PAF402-02 F00024 AF1008HL5029 AD5501 2 RCB SGAD>68' 19 AF9008HL5029 2C369PAF402-02 F00024 AF1008HL5030 AD5501 2 RCB OMB >19' 19 AF9008HL5030 2C369PAF402-02 F00024 AF1008HL5041 N AD5501 2 RCB SGAD>68' 19 AF9008HL5041 2C369PAF402-02 F00024 AF1008HL5041 S AD5501 2 RCB SGAD>68' 19 AF9008HL5041 2C369PAF402-02 F00024 AF1010HL5002L AD5501 2 RCB OMB >19' 19 AF9010HL5002 2C369PAF402-01 F00024 AF1010 HL5002U AD5501 2 RCB OMB >19' 19 AF9010HL5002 2C369PAF402-01 F00024 AF1010HL5007E AD5501 2 RCB SGBC>52' 19 AF9010HL5007 2C369PAF402-01 F00024 AF101OHL5007W AD5501 2 RCB SGBC>52' 19 AF901OHL5007 2C369PAF402-01 F00024

Unit-1 Snubber IST Listing Pages 2 of 13 Mdtpns Tagtpns I Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg AF1010HL5008L AD5501 2 RCB SGBC>68' 19 AF9010HL5008 2C369PAF402-01 F00024 AF101OHL5008U AD5501 2 RCB SGBC>68' 19 AF9010HL5008 2C369PAF402-01 F00024 AF1010HL5009 AD1601 2 RCB SGBC>68' 19 AF9010HL5009 2C369PAF402-01 F00024 AF101OHL5017 AD5501 2 RCB SGBC>68' 19 AF901OHL5017 2C369PAF402-01 F00024 AF101OHL5018 AD1601 2 RCB SGBC>68' 19 AF901OHL5018 2C369PAF402-01 F00024 AF1010HL5020 AD1601 2 RCB SGBC>68' 19 AF9010HL5020 2C369PAF402-01 F00024 AF1010HL5026 AD1601 2 RCB SGBC>19' 19 AF9010HL5026 2C369PAF402-01 F00024 AF1010HL5035 AD1601 2 RCB SGBC>68' 19 AF9010HL5035 2C369PAF402-01 F00024 AF1012HL5014E AD1601 2 RCB SGBC>68' 19 AF9012HL5014 2C369PAF402-01 F00024 AF1012HL5014W AD1601 2 RCB SGBC>68' 19 AF9012HL5014 2C369PAF402-01 F00024 AF1012HL5017 AD5501 2 RCB SGBC>68' 19 AF9012HL5017 2C369PAF402-01 F00024 AF1012HL5018 AD1601 2 RCB SGBC>68' 19 AF9012HL5018 2C369PAF402-01 F00024 AF101 2HL5020 AD1601 2 RCB SGBC>68' 19 AF9012HL5020 2C369PAF402-01 F00024 AF101 2HL5024 AD5501 2 RCB OMB >19' 19 AF9012HL5024 2C369PAF402-01 F00024 AF1012HL5027 AD5501 2 RCB OMB >19' 19 AF9012HL5027 2C369PAF402-01 F00024 AF101 2HL5038L AD5501 2 RCB SGBC>68' 19 AF9012HL5038 2C369PAF402-01 F00024 AF101 2HL5038U AD5501 2 RCB SGBC>68' 19 AF9012HL5038 2C369PAF402-01 F00024 AF1054HL5004N AD151 3 IVC D 34 AF9054H L5004 5G369PAF602-1 0 F00024 AF1054HL5004S AD151 3 IVC D 34 AF9054H L5004 5G369PAF602-1 0 F00024 AF1061HL5001 AD1601 2 RCB SGAD>52' 19 AF9061HL5001 2C369PAF402-02 F00024 AF1061HL5002 AD1601 2 RCB SGAD>68' 19 AF9061 HL5002 2C369PAF402-02 F00024 AF1062HL5011 AD1601 2 RCB SGAD>68' 19 AF9062HL5011 2C369PAF402-02 F00024 AF1062HL5012 AD1601 2 RCB SGAD>68' 19 AF9062HL5012 2C369PAF402-02 F00024 AF1062HL5015 AD1601 2 RCB SGAD>52' 19 AF9062HL5015 2C369PAF402-02 F00024 AF1063HL5002 AD1601 2 RCB SGBC>68' 19 AF9063HL5002 2C369PAF402-01 F00024 AF1063HL5003 AD151 2 RCB SGBC>68' 19 AF9063HL5003 2C369PAF402-01 F00024 AF1063HL5005 AD1601 2 RCB SGBC>68' 19 AF9063HL5005 2C369PAF402-01 F00024 AF1063HL5006 AD1601 2 RCB SGBC>68' 19 AF9063HL5006 2C369PAF402-01 F00024 AF1064HL5004 AD1601 2 RCB SGBC>52' 19 AF9064HL5004 2C369PAF402-01 F00024 AP1003HF5001 AD41 2 MAB RM 108 29 AP1003HF5001 5M369PAP287-A01 Z47501

Unit-1 Snubber IST Listing Pages 3 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg CC1i105HL5004 AD5501 3 RCB RHR HX 1A 37 CC9105HL5004 4C369PCC407-08 F05017 CC1105HL5009 AD5501 3 RCB OMB >52' 52 CC9105HL5009 4C369PCC407-08 F05017 CC1i109HL5001 N AD501 3 MAB RM 106A 27 CC9109HL5001 5M361 PCC207-07 F05017 CC1i109HL5001 S AD501 3 MAB RM 106A 27 CC9109HL5001 5M361 PCC207-07 F05017 CC1i 1OHL5001 AD1601 3 MAB RM 106A 27 CC91 1OH L5001 5M361 PCC207-07 F05017 CC1136HL5002 AD501 7 MAB RM 64 10 CC9136HL5002 5M361 PCC207-07 F05017 CC1205HL5007L AD501 3 RCB OMB >52' 52 CC9205HL5007 4C369PCC407-07 F05018 CC1205HL5007U AD501 3 RCB OMB >52' 52 CC9205HL5007 4C369PCC407-07 F05018 CC1206HL5008 AD501 3 RCB OMB >52' 52 CC9206HL5008 4C369PCC407-1 0 F05018 CC1209HL5002 AD 1601 3 MAB RM 216 41 CC9209HL5002 5M369PCC207-11 F05018 CC1209HL5003 AD1601 3 MAB RM 216 41 CC9209HL5003 5M369PCC207-11 F05018 CC121OHL5001 AD1601 3 MAB RM 106A 27 CC9210HL5001 5M369PCC207-22 F05018 CC1215SS0002 AD501 3 RCB OMB >-11 -11 CC9215SS0002 3C369PCC407-16 F05018 CC1220SS0002L AD501 3 MAB RM 64 10 CC9220SS0002 5M369PCC207-11 F05018 CC1 220SS0002U AD501 3 MAB RM 64 10 CC9220SS0002 5M369PCC207-11 F05018 CC1309SS0002 AD1601 3 MAB RM 216 41 CC9309SS0002 5M361 PCC207-01 F05019 CC01309SS0003L AD1601 3 MAB RM 216 41 CC9309SS0003 5M361 PCC207-01 F05019 CC1309SS0003U AD1601 3 MAB RM 216 41 CC9309SS0003 5M361 PCC207-01 F05019 CC1311SS0001 AD1601 3 MAB RM 216 41 CC9311SS0001 5M369PCC207-08 F05019 CC1320HL5001 AD1601 3 MAB RM 216 41 CC9320HL5001 5M361 PCC207-01 F05019 CC1425HL5016 AD151 3 FHB RM 208 30 CC9425HL5016 5M361 PCC207-01 F05020 CC1613SS0003 AD151 7 RCB OMB >37' 37 CC9613SS0003 5C369PCC407-03 F05021 CV1002HL5002 AD71 2 RCB SGBC>52' 19 CV9002HL5002 4C369PCV417-04 F05005 CV1002HL5003 AD71 2 RCB SGBC>19' 19 CV9002HL5003 4C369PCV417-04 F05005 CV1002HL5004 AD71 2 RCB SGBC>19' 19 CV9002HL5004 4C369PCV417-04 F05005 CV1002HL5007 AD151 2 RCB SGBC>19' 19 CV9002HL5007 4C369PCV417-04 F05005 CV1002HL5008 AD71 2 RCB SGBC>37' 19 CV9002HL5008 4C369PCV417-04 F05005 CV1002HL5009 AD151 2 RCB SGBC>37' 19 CV9002HL5009 4C369PCV417-04 F05005 CV1002HL5010 AD151 2 RCB SGBC>19' 19 CV9002HL5010 4C369PCV417-04 F05005 CV1002HL5012 AD71 2 RCB SGBC>37' 19 CV9002HL5012 4C369PCV417-04 F05005

Unit-1 Snubber IST Listing Pages 4 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg CV1002HL5019 AD151 2 RCB SGBC>19' 19 CV9002HL5019 4C369PCV417-04 F05005 CV1002HL5020 AD151 2 RCB SGBC>19' 19 CV9002HL5020 4C369PCV417-04 F05005 CV1002HL5021 AD501 2 RCB SGBC>19' 19 CV9002HL5021 4C369PCV417-04 F05005 CV1003HF5003 AD151 2 RCB RGN HX 37 CV1003HF5003 5C369PCV417-A09 F05005 CV1003HL5003N AD151 2 RCB RGN HX 37 CV2003HL5003 4C369PCV417-04 F05005 CV1003HL5003S AD151 2 RCB RGN HX 37 CV1003HL5003 4C369PCV417-04 F05005 CV1004HF5001 AD41 2 RCB RGN HX 37 CV1004HF5001 5C369PCV417-A09 F05005 CV1005HF5001 AD41 2 RCB RGN HX 37 CV1005HF5001 5C369PCV417-A09 F05005 CV1006HL5037L AD151 2 MAB RM 108 29 CV9006HL5037 4M369PCV217-04 CV1006HL5037U AD151 2 MAB RM 108 29 CV9006HL5037 4M369PCV217-04 CV1011H L5009 AD71 2 MAB RM 49 10 CV901 1HL5009 4M369PCV217-04 F05006 CV1086SS0002 AD71 2 MAB RM 110 29 CV9086SS0002 2M369PCV217-05 F05006 CV1088HL5002 AD41 2 MAB RM 31 10 CV9088HL5002 4M369PCV217-04 F05006 CV11 16HL5018 AD71 2 MAB RM 108 29 CV9116HL5018 2M369PCV217-20 F05007 CV1117HF5054 AD41 2 RCB PZR 37 CV1i117HF5054 4C369PCV417-A02 F05005 CV1i117HL5005 AD501 2 RCB SGBC>37' 19 CV9117HL5005 4C369PCV417-02 F05005 CV1117SS0006 AD1601 2 RCB SGBC>37' 19 CV9117SS0006 4C369PCV417-02 F05005 CV1i121 HS5007 AD41 1 RCB PZR 37 CV9121 HS5007 4C369PCV417-A02 F05005 CV1121HS5009 AD151 1 RCB PZR 37 CV9121 HS5009 4C369PCV417-A02 F05005 CV1121HS5010 AD151 1 RCB PZR 37 CV9121 HS501 0 4C369PCV417-A02 F05005 FC1009SS0001 AD41 3 FHB RM 110 21 FC9009SS0001 4F369PFC530-03 F05028 FC 1011 HL5001 AD1601 2 FHB RM 110 21 FC901 1HL5001 4F369PFC530-02 F05028 FC101 2HL5002 AD501 3 FHB RM 110 21 FC9012HL5002 4F369PFC530-02 F05028 FW1012HL5002E AD5501 2 RCB SGAD>37' 19 FW9012HL5002 2C369PFW433-01 F00062 FW1012HL5002W AD5501 2 RCB SGAD>37' 19 FW9012HL5002 2C369PFW433-01 F00062 FW1012HL5003 AD12501 2 RCB SGAD>37' 19 FW9012HL5003 2C369PFW433-01 F00062 FW1012HL5005L AD5501 2 RCB OMB >37' 37 FW9012HL5005 2C369PFW433-01 F00062 FW101 2HL5005U AD5501 2 RCB OMB >37' 37 FW9012HL5005 2C369PFW433-01 F00062 FW1012HL5011 AD5501 2 RCB SGAD>19' 19 FW9012HL5011 2C369PFW433-01 F00062 FW1012HL5016 AD12501 2 RCB SGAD>37' 19 FW1012HL5016 2C369PFW433-01 F00062

Unit-1 Snubber IST Listing Pages 5 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg FW1014HL5001E AD5501 2 RCB SGBC>37' FW9014HL5001 2C369PFW433-01 F00062 FW1014HL5001W AD5501 2 RCB SGBC>37' FW9014HL5001 2C369PFW433-01 F00062 FW1014HL5002 AD12501 2 RCB SGBC>37' 19 FW9014HL5002 2C369PFW433-01 F00062 FW1014HL5003L AD5501 2 RCB RGN HX 37 FW9014HL5003 2C369PFW433-01 F00062 FW1014HL5003U AD5501 2 RCB RGN HX 37 FW9014HL5003 2C369PFW433-01 F00062 FW1014HL5009 AD12501 2 RCB SGBC>37' 19 FW9014HL5009 2C369PFW433-01 F00062 FW1014HL5012 AD5501 2 RCB SGBC>19' 19 FW9014HL5012 2C369PFW433-01 F00062 FW1016HL5003 AD5501 2 RCB RGN HX 37 FW9016HL5003 2C369PFW433-11 F00062 FW1016HL5004 AD5501 2 RCB SGBC>19' 19 FW9016HL5004 2C369PFW433-01 F00062 FW1016HL5006 AD5501 2 RCB SGBC>52' 19 FW9016HL5006 2C369PFW433-01 F00062 FW1016HL5007 AD5501 2 RCB SGBC>19' 19 FW9016HL5007 2C369PFW433-01 F00062 FW1016HL5008 AD5501 2 RCB RGN HX 37 FW9016HL5008 2C369PFW433-01 F00062 FW1016HL5009 AD12501 2 RCB SGBC>37' 19 FW9016HL5009 2C369PFW433-01 F00062 FW1016HL5010 AD5501 2 RCB SGBC>37' 19 FW9016HL5010 2C369PFW433-01 F00062 FW1016SH0001 AD5501 2 RCB SGBC>37' 19 FW9016SHOO01 2C369PFW433-01 F00062 FW1016SS0006 AD5501 2 RCB SGBC>52' 19 FW9016SS0006 2C369PFW433-01 F00062 FW1018HL5003 AD5501 2 RCB OMB >37' 37 FW9018HL5003 2C369PFW433-01 F00062 FW1018HL5004 AD5501 2 RCB SGAD>19' 19 FW9018HL5004 2C369PFW433-01 F00062 FW1018HL5006L AD5501 2 RCB OMB >37' 37 FW9018HL5006 2C369PFW433-01 F00062 FW1018HL5006U AD5501 2 RCB OMB >37' 37 FW9018HL5006 2C369PFW433-01 F00062 FW1018HL5007N AD5501 2 RCB SGAD>37' 19 FW9018HL5007 2C369PFW433-01 F00062 FW1018HL5007S AD5501 2 RCB SGAD>37' 19 FW9018HL5007 2C369PFW433-01 F00062 FW101 8HL5008 AD12501 2 RCB SGAD>37' 19 FW9018HL5008 2C369PFW433-01 F00062 FW1018HL5009 AD12501 2 RCB SGAD>37' 19 FW9018HL5009 2C369PFW433-01 F00062 FW1018SS0001 AD5501 2 RCB SGAD>19' 19 FW9018SS0001 2C369PFW433-01 F00062 FW1018SS0006 AD5501 2 RCB SGAD>52' 19 FW9018SS0006 2C369PFW433-01 F00062 FW1018SS0007 AD12501 2 RCB SGAD>37' 19 FW9018SS0007 2C369PFW433-01 F00062 FW1029HL5002E AD1601 2 IVC A 44 FW9029HL5002 2G369PFW633-02 F00062 FW1029HL5002W AD1601 2 IVC A 44 FW9029HL5002 2G369PFW633-02 F00062 FW1029HL5003 AD1601 2 IVC A 44 FW9029HL5003 2G369PFW633-02 F00062

Unit-1 Snubber IST Listing Pages 6 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg FW1030HL5002E AD1601 2 IVC B 44 FW9030H L5002 2G369PFW633-03 F00062 FW1030HL5002W AD1601 2 IVC B 44 FW9030HL5002 2G369PFW633-03 F00062 FW1030HL5003 AD1601 2 IVC B 44 FW9030HL5003 2G369PFW633-03 F00062 FW1031HL5002E AD1601 2 IVC C 44 FW9031 HL5002 2G369PFW633-04 F00062 FW1031HL5002W AD1601 2 IVC C 44 FW9031 HL5002 2G369PFW633-04 F00062 FW1031HL5003 AD1601 2 IVC C 44 FW9031 HL5003 2G369PFW633-04 F00062 FW1032HL5002E AD1601 2 IVC D 44 FW9032 HL5002 2G369PFW633-01 F00062 FW1032HL5002W AD1601 2 IVC D 44 FW9032HL5002 2G369PFW633-01 F00062 FW1032HL5003 AD1601 2 IVC D 44 FW9032HL5003 2G369PFW633-01 F00063 FW1 1 17HL5001 AD41 2 IVC C 34 FW9117HL5001 2G369PFW633-05 F00063 FW1 1 17HL5003 AD41 2 IVC C 34 FW9117HL5003 2G369PFW633-05 F00063 FW1 117HL5004 AD41 2 IVC C 44 FW9117HL5004 2G369PFW633-05 F00063 FWI 119HL5001 AD41 2 IVC B 34 FW9119HL5001 2G369PFW633-05 F00063 FW1 119HL5003 AD41 2 IVC B 34 FW9119HL5003 2G369PFW633-05 F00063 FW1 119HL5004 AD41 2 IVC B 44 FW9119HL5004 2G369PFW633-05 F00063 FW1 121 HL5001 AD41 2 IVC A 34 FW9121 HL5001 2G369PFW633-05 F00063 FW1 121H L5003 AD41 2 IVC A 34 FW9121 HL5003 2G369PFW633-05 F00063 FW1 121 HL5004 AD41 2 IVC A 34 FW9121 HL5004 2G369PFW633-05 F00063 FW1 123H L5001 AD41 2 IVC D 34 FW9123HL5001 2G369PFW633-05 F00063 FW1 123H L5003 AD41 2 IVC D 34 FW9123HL5003 2G369PFW633-05 F00063 FW 123HL5004 AD41 2 IVC D 34 FW9123HL5004 2G369PFW633-05 F00063 MD1 147HF5002 AD71 7 IVC A 44 MD1 147HF5002 9G369PMD645-AO1 F00055 MD1 148HF5002 AD71 7 IVC B 44 MD1 148HF5002 9G369PMD645-AO1 F00055 MD1 149HF5002 AD71 7 IVC C 44 MD1 149HF5002 9G369PMD645-AO1 F00055 MDI 150HF5002 AD41 7 IVC D 44 MD1 150HF5002 9G369PMD645-AO1 F00055 MS1001HL5004 AD5501 2 RCB OMB >68' 68 MS9001 HL5004 2C369PMS446-01 F00016 MS1001HL5007 AD12501 2 RCB SGAD>68' 19 MS9001 HL5007 2C369PMS446-01 F00016 MS1001HL5010L AD1601 2 IVC A 51 MS9001 HL5010 2G369PMS646-06 F00016 MS1001HL5010U AD1601 2 IVC A 51 MS9001HL5010 2G369PMS646-06 F00016 MS1001HL501 1E AD5501 2 IVC A 51 MS9001HL5011 2G369PMS646-06 F00016

Unit-1 Snubber IST Listing Pages 7 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg MS1001HL501 1W AD5501 2 IVC A 51 MS9001 HL501 1 2G369PMS646-06 F00016 MS1001HL5012L AD1601 2 IVC A 51 MS9001 HL5012 2G369PMS646-06 F00016 MS1001HL5012U AD1601 2 IVC A 51 MS9001 HL5012 2G369PMS646-06 F00016 MS1001HL5015 AD5501 2 RCB SGAD>83' 19 MS9001 HL5015 2C369PMS446-01 F00016 MS1002HL5006 AD5501 2 RCB OMB >68' 68 MS9002HL5006 2C369PMS466-02 F00016 MS1002HL5007 AD12501 2 RCB SGBC>68' 19 MS9002HL5007 2C369PMS446-02 F00016 MS1002HL5010L AD1601 2 IVC B 51 MS9002HL5010 2G369PMS646-07 F00016 MS1002HL501OU AD1601 2 IVC B 51 MS9002HL5010 2G369PMS646-07 F00016 MS1 002HL501 1E AD5501 2 IVC B 51 MS9002HL5011 2G369PMS646-07 F00016 MS1002HL501 1W AD5501 2 IVC B 51 MS9002HL5011 2G369PMS646-07 F00016 MS1002HL5012L AD1601 2 IVC B 51 MS9002HL5012 2G369PMS646-07 F00016 MS1002HL5012U AD1601 2 IVC B 51 MS9002HL5012 2G369PMS646-07 F00016 MS1002HL5015 AD5501 2 RCB SGBC>83' 19 MS9002HL5015 2C369PMS446-02 F00016 MS1002HL5016 AD5501 2 RCB SGBC>83' 19 MS9002HL5016 2C369PMS446-02 F00016 MS1003HL5004 AD5501 2 RCB OMB >68' 68 MS9003HL5004 2C369PMS446-03 F00016 MS1003HL5012 AD12501 2 RCB SGBC>68' 19 MS9003HL5012 2C369PMS446-03 F00016 MS1003HL5013 AD5501 2 RCB SGBC>83' 19 MS9003HL5013 2C369PMS446-03 F00016 MS1003HL5014 AD5501 2 RCB SGBC>83' 19 MS9003HL5014 2C369PMS446-03 F00016 MS1003HL5015L AD1601 2 IVC C 51 MS9003HL5015 2G369PMS646-08 F00016 MS1003HL5015U AD1601 2 IVC C 51 MS9003HL5015 2G369PMS646-08 F00016 MS1003HL5016E AD5501 2 IVC C 51 MS9003HL5016 2G369PMS646-08 F00016 MS1003HL5016W AD5501 2 IVC C 51 MS9003HL5016 2G369PMS646-08 F00016 MS1003HLL5017L AD1601 2 IVC C 51 MS9003HL5017 2G369PMS646-08 F00016 MS1003HL5017U AD1601 2 IVC C 51 MS9003HL5017 2G369PMS646-08 F00016 MS1004HL5007 AD5501 2 RCB OMB >68' 68 MS9004HL5007 2C369PMS446-04 F00016 MS1004HL5012 AD12501 2 RCB SGAD>68' 19 MS9004HL5012 2C369PMS446-04 F00016 MS1004HL5013 AD12501 2 RCB PZR 37 MS9004HL5013 2C369PMS446-04 F00016 MS1004HL5014 AD12501 2 RCB SGAD>83' 19 MS9004HL5014 2C369PMS446-04 F00016 MS1004HL5015L AD1601 2 IVC D 51 MS9004HL5015 2G369PMS646-09 F00016 MS1004HL5015U AD1601 2 IVC D 51 MS9004HL5015 2G369PMS646-09 F00016

Unit-1 Snubber IST Listing Pages 8 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg MS1004HL5016E AD5501 2 IVC D 51 MS9004HL5016 2G369PMS646-09 F00016 MS1004HL5016W AD5501 2 IVC D 51 MS9004HL5016 2G369PMS646-09 F00016 MS1004HL5017L AD1601 2 IVC D 51 MS9004HL5017 2G369PMS646-09 F00016 MS1004HL5017U AD1601 2 IVC D 51 MS9004HL5017 2G369PMS646-09 F00016 MS1005SS0001 N AD5501 7 TGB B 55 MS9005SS0001 7G369PMS846-05 F00016 MS1005SS0001S AD5501 7 TGB B 55 MS9005SS0001 7G369PMS846-05 F00016 MS1005SS0002E AD5501 7 TGB B 29 MS9005SS0002 7G369PMS846-05 F00016 MS1005SS0002W AD5501 7 TGB B 29 MS9005SS0002 7G369PMS846-05 F00016 MS1006SS0001 N AD5501 7 TGB B 55 MS9006SS0001 7G369PMS846-06 F00016 MS1006SS0001S AD5501 7 TGB B 55 MS9006SS0001 7G369PMS846-06 F00016 MS1006SS0002E AD5501 7 TGB B 29 MS9006SS0002 7G369PMS846-06 F00016 MS1006SS0002W AD5501 7 TGB B 29 MS9006SS0002 7G369PMS846-06 F00016 MS1007SS0002E AD5501 7 TGB B 29 MS9007SS0002 7G369PMS846-06 F00016 MS1 007SS0002W AD5501 7 TGB B 29 MS9007SS0002 7G369PMS846-06 F00016 MS1008HL5001 AD5501 7 TGB B 55 MS9008HL5001 7G369PMS846-05 F00016 MS1 008SS0001 E AD5501 7 TGB B 29 MS9008SS0001 7G369PMS846-05 F00016 MS1008SS0001W AD5501 7 TGB B 29 MS9008SS0001 7G369PMS846-05 F00016 MS101 3HL5002E AD5501 7 TGB B 55 MS9013HL5002 7G369PMS846-08 F00016 MS101 3HL5002W AD5501 7 TGB B 55 MS9013HL5002 7G369PMS846-08 F00016 MS1013HL5003 AD5501 7 TGB B 55 MS9013HL5003 7G3G9PMS846-05 F00016 MS1013HL5004 AD5501 7 TGB B 55 MS9013HL5004 7G369PMS846-05 F00016 MS1013SS0002E AD5501 7 TGB B 55 MS9013SS0002 7G369PMS846-09 F00016 MS1013SS0002W AD5501 7 TGB B 55 MS9013SS0002 7G369PMS846-09 F00016 MS1 051 HL5009 AD71 3 IVC D 10 MS9051 HL5009 4G369PMS646-05 F00024 PS1020HF5002 AD41 7 MAB RM 108 29 PS1020HF5002 5M369PPS285-AO1 Z00045 RC100OSS0001 AD151 1 RCB PZR 37 RC9000SS0001 4C369PRC457-07 F05003 RC1003HL5006 AD501 1 RCB PZR 37 RC9003HL5006 1C369PRC457-06 F05003 RC1003HL5009 AD501 1 RCB PZR 37 RC9003HL5009 1C369PRC457-06 F05003 RC1014HL5001 AD5501 7 RCB PZR 37 RC9014HL5001 7C369PRC457-02 F05004 RC1014HL5003E AD5501 7 RCB PZR 37 RC9014HL5003 7C769PRC457-02 F05004

Unit-1 Snubber IST Listing Pages 9 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg RC1014HL5003W AD5501 RCB PZR 37 RC9014HL5003 7C369PRC457-02 F05004 RC1014HL5005N AD5501 RCB PZR 37 RC9014HL5005 7C369PRC457-02 F05004 RC1014HL5005S AD5501 RCB PZR 37 RC9014HL5005 7C369PRC457-02 F05004 RC1014HL5006L AD5501 RCB PZR 37 RC9014HL5006 7C369PRC457-02 F05004 RC1014HL5006U AD5501 RCB PZR 37 RC9014HL5006 7C369PRC457-02 F05004 RC1014HL5009 AD501 RCB PZR 37 RC9014HL5009 7C369PRC457-02 F05004 RC1014HL5012N AD5501 RCB PZR 37 RC9014HL5012 7C369PRC457-02 F05004 RC1014HL5012S AD5501 RCB PZR 37 RC9014HL5012 7C369PRC457-02 F05004 RC1014HL5013 AD1601 RCB PZR, 37 RC9014HL5013 7C369PRC457-02 F05004 RC1014HL5015 AD1601 RCB PZR 37 RC9014HL5015 7C369PRC457-02 F05004 RC1014HL5019N AD5501 RCB PZR 19 RC9014HL5019 7C369PRC457-02 F05004 RC1014HL5019S AD5501 RCB PZR 19 RC9014HL5019 7C369PRC457-02 F05004 RC1014HL5026. AD501 RCB PZR 19 RC9014HL5026 7C369PRC457-02 F05004 RC1014HL5028 AD1601 RCB PZR 19 RC9014HL5028 7C369PRC457-02 F05004 RC1 112HL5002 AD5501 RCB SGAD>19' 19 RC9112HL5002 4C369PRC457-09 F05001 RC1 123HL5013 AD501 RCB PZR 37 RC9123HL5013 4C369PRC457-07 F05001 RC1 125HL5001 AD5501 RCB IMB >-11 -11 RC9125HL5001 4C369PRC457-10 F05001 RC1 125HL5008 AD1601 RCB IMB >-11 -11 RC9125HL5008 4C369PRC457-10 F05001 RC1221 HL5001 AD1601 RCB IMB >-11 -11 RC9221 HL5001 4C369PRC457-10 F05001 RC1221HL5003 AD5501 RCB IMB >-11 -11 RC9221 HL5003 4C369PRC457-10 F05001 RC1221HL5004 AD5501 RCB SGBC>19' 19 RC9221 HL5004 4C369PRC457-10 F05001 RC1221HL5005 AD5501 RCB SGBC>19' 19 RC9221 HL5005 4C369PRC457-10 F05001 RC1221HL5006 AD5501 RCB IMB >-11 -11 RC9221 HL5006 4C369PRC457-1 0 F05001 RC1221HL5007 AD5501 RCB IMB >-11 -11 RC9221 HL5007 4C369PRC457-10 F05001 RC1320HL5002 AD1601 RCB SGBC>19' 19 RC9320HL5002 4C369PRC457-04 F05001 RC1320HL5004 AD501 RCB SGBC>19' 19 RC9320HL5004 4C369PRC457-04 F05001 RC1422HL5019 AD501 RCB SGAD>52' 19 RC9422HL5019 1C369PRC457-06 F05001 RH1 101 HL5001 AD1601 RCB VLV RM -2 RH91 01 HL5001 4C369PRH459-04 F20000 RH1101HL5002 AD1601 RCB VLV RM -2 RH91 01 HL5002 4C369PRH459-04 F20000 RH1101HL5003 AD1601 RCB VLV RM 19 RH9101HL5003 4C369PRH459-04 F20000

Unit-1 Snubber IST Listing Pages 10 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg RH1101HL5006 AD5501 1 RCB SGAD>19' 19 RH9101HL5006 4C369PRC459-04 F20000 RH1101HL5009 AD1601 1 RCB SGAD>19' 19 RH9101 HL5009 4C369PRH459-04 F20000 RH1110HL5002 AD501 2 RCB SGAD>19' 19 RH91 10HL5002 4C369PRH459-03 F20000 RH1201HL5001 AD1601 1 RCB VLV RM -2 RH9201 HL5001 4C369PRH459-07 F20000 RH1201HL5006 AD5501 1 RCB VLV RM -2 RH9201 HL5006 4C369PRH459-07 F20000 RH1202SS0002 AD1601 2 RCB VLV RM -2 RH9202SS0002 4C369PRH459-07 F20000 RH1203HL5001 AD501 2 RCB VLV RM 19 RH9203HL5001 2C369PRH459-02 F20000 RH1204HL5001 AD501 2 RCB VLV RM 19 RH9204HL5001 2C369PRH459-02 F20000 RH1211 HL5002L AD501 2 RCB SGBC>19' 19 RH921 1HL5002 4C369PRH459-07 F20000 RH121 1HL5002U AD501 2 RCB SGBC>19' 19 RH921 1HL5002 4C369PRH459-07 F20000 RH1303HL5007 AD501 2 RCB VLV RM 19 RH9303HL5007 2C369PRH459-05 F20000 RH1303HL5009 AD501 2 RCB VLV RM -2 RH9303HL5009 2C369PRH459-05 F20000 RH1306SS0001 AD501 2 RCB VLV RM -2 RH9306SS0001 4C369PRH459-06 F20000 RH1312HL5002 AD501 2 RCB VLV RM 19 RH9312HL5002 4C369PRH459-01 F20000 RH1313HL5003L AD501 2 RCB SGBC>19' 19 RH9313HL5003 4C369PRH459-06 F20000 RH1313HL5003U AD501 2 RCB SGBC>19' 19 RH9313HL5003 4C369PRH459-06 F20000 SB1101HL5007 AD1601 2 RCB OMB >19' 19 SB9101 HL5007 2C369PSB468-02 F20001 SB1 101HL5012 AD501 2 RCB SGAD>19' 19 SB9101 HL5012 2C369PSB468-02 F20001 SB1 101HL5017 AD1601 2 RCB OMB >19' 19 SB9101HL5017 2C369PSB468-02 F20001 SB1101HL5019 AD501 2 IVC A 10 SB9101HL5019 5G369PSB668-03 F20001 SB1101HL5020 AD501 2 IVC A 10 SB9101 HL5020 5G369PSB668-03 F20001 SB1101HL5022 AD501 2 IVC A 10 SB9101 HL5022 5G369PSB668-03 F20001 SB 104HL5001 AD501 7 IVC A 10 SB9104HL5001 5G369PSB668-03 F20001 SB1104HL5002 AD501 7 IVC A 10 SB9104HL5002 5G369PSB668-03 F20001 SB1104HL5006 AD501 7 IVC A 10 SB9104HL5006 5G369PSB668-03 F20001 SB 105HL5001 AD71 7 IVC A 10 SB9105HL5001 5G369PSB668-03 F20001 SB1107HF5001 AD41 2 IVC A 10 SB1 107HF5001 7G369PSB668-AO1 F20001 SB1201HL5004 AD1601 2 RCB OMB >19' 19 SB9201 HL5004 2C369PSB468-02 F20001 SB1201HL5010 AD1601 2 RCB OMB >19' 19 SB9201 HL501 0 2C369PSB468-02 F20001 SB1201HL5013 AD501 2 RCB SGBC>19' 19 SB9201 HL5013 2C369PSB468-02 F20001

Unit-1 Snubber IST Listing Pages 11 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg SB1201HL5017 AD501 2 IVC B 10 SB9201 HL5017 5G369PSB668-05 F20001 SB1201HL5018 AD501 2 IVC B 10 SB9201 HL5018 5G369PSB668-05 720001 SB1201HL5020 AD501 2 IVC B 10 SB9201HL5020 5G369PSB668-05 F20001 SB1202HF5002 AD71 2 RCB SGBC>19' 19 SB1202HF5002 2C361 PSB468-A05 F20001 SB1204HL5001 AD501 7 IVC B 10 SB9204HL5001 5G369PSB668-05 F20001 SB1204HL5002 AD501 7 IVC B 10 SB9204HL5002 5G369PSB668-05 F20001 SB1205HL5003 AD151 7 IVC B 10 SB9205HL5003 5G369PSB668-05 F20001 SB1207HF5001 AD41 7 IVC B 10 SB1207HF5001 7G369PSB668-AO1 F20001 SB1250HF5003 AD41 2 RCB SGBC>19' 19 SB1250HF5003 2C361 PSB468-A05 F20001 SB1274HL5002L AD151 7 IVC B 10 SB9274HL5002 5G369PSB668-05 F20002 SB1274HL5002U AD151 7 IVC B 10 SB9274HL5002 5G369PSB668-05 F20002 SB1301HL5003L AD501 2 RCB OMB >19' 19 SB9301 HL5003 2C369PSB468-02 F20001 SB1301 HL5003U AD501 2 RCB OMB >19' 19 SB9301 HL5003 2C369PSB468-02 F20001 SB1 301 HL501 1L AD501 2 RCB SGBC>19' 19 SB9301HL5011 2C369PSB468-02 F20001 SB1 301 HL501 1U AD501 2 RCB SGBC>19' 19 SB9301HL5011 2C369PSB468-02 F20001 SB1301HL5012N AD151 2 RCB SGBC>19' 19 SB9301 HL5012 2C369PSB468-02 F20001 SB1301HL5012S AD151 2 RCB SGBC>19' 19 SB9301 HL5012 2C369PSB468-02 F20001 SB1301HL5018 AD501 2 IVC C 10 SB9301HL5018 5G369PSB668-07 F20001 SB1301HL5020 AD501 2 IVC C 10 SB9301 HL5020 5G369PSB668-07 F20001 SB1301HL5021 AD501 2 IVC C 10 SB9301HL5021 5G369PSB668-07 F20001 SB1302HF5003 AD41 2 RCB SGBC>19' 19 SB1302HF5003 2C369PSB468-A04 F20001 SB1303HF5005 AD151 2 RCB SGBC>37' 19 SB1303HF5005 2C369PSB468-A04 F20001 SB1304HL5001 AD501 7 IVC C 10 SB9304HL5001 5G369PSB668-07 F20001 SB1304HL5002 AD501 7 IVC C 10 SB9304HL5002 5G369PSB668-07 F20001 SB1304HL5006 AD501 7 IVC C 10 SB9304HL5006 5G369PSB668-07 F20001 SB1350HF5016 AD41 2 RCB SGBC>19' 19 SB1350HF5016 2C361 PSB468-A05 F20001 SB1401 HL5003 AD1601 2 RCB OMB >19' 19 SB9401 HL5003 2C369PSB468-02 F20001 SB1401HL5011 AD1601 2 RCB OMB >19' 19 SB9401HL5011 2C369PSB468-02 F20001 SB1401HL5012 AD501 2 RCB SGAD>19' 19 SB9401 HL5012 2C369PSB468-02 F20001 SB1401HL5016L AD151 2 RCB SGAD>19' 19 SB9401 HL5016 2C369PSB468-02 F20001

Unit-1 Snubber IST Listing Pages 12 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg SB1401HL5016U AD151 2 RCB SGAD>19' 19 SB9401 HL5016 2C369PSB468-02 F20001 SB1401HL5019 AD501 2 RCB SGAD>19' 19 SB9401 HL5019 2C369PSB468-02 F20001 SB1401HL5020 AD501 2 IVC D 10 SB9401 HL5020 5G369PSB668-01 F20001 SB1401 HL5022 AD501 2 IVC D 10 SB9401 HL5022 5G369PSB668-01 F20001 SB1401 HL5023 AD501 2 IVC D 10 SB9401 HL5023 5G369PSB668-01 F20001 SB1402HF5002 AD71 2 RCB SGAD>37' 19 SB1402HF5002 2C369PSB468-A04 F20001 SB1402HF5004 AD71 2 RCB SGAD>37' 19 SB1402HF5004 2C369PSB468-A04 F20001 SB1403HF5002 AD71 2 RCB SGAD>19' 19 SB1403HF5002 2C368PSB468-A04 F20001 SB1404HL5001 AD501 7 IVC D 10 SB9404HL5001 5G369PSB668-01 F20001 SB1404HL5002 AD501 7 IVC D 10 SB9404HL5002 5G369PSB668-01 F20001 SB1406HL5007 AD41 7 IVC D 10 SB9406HL5007 5G369PSB668-01 F20001 SB1407HF5001 AD41 7 IVC D 10 SB1407HF5001 7G369PSB668-AO1 F20001 SB1474HL5002 AD501 7 IVC D 10 SB9474HL5002 5G369PSB668-01 F20002 S11101 SS0008L AD501 2 FHB HHSI A -29 S191 01 SS0008 2F369PS1572-03 F05013 S11101 SS0008U AD501 2 FHB HHSI A -29 S191 01 SS0008 2F369PS1572-03 F05013 SI1 107HL5001 N AD501 2 RCB OMB >19' 19 S19107HL5001 4C369PS1472-01 F05013 SIl 107HL5001S AD501 2 RCB OMB >19' 19 S19107HL5001 4C369PS1472-01 F05013 SI1 107SS0061 AD501 2 RCB OMB >19' 19 S19107SS0061 4C369PS1472-01 F05013 SI1 108HL5001 AD1601 1 RCB SGAD>19' 19 S19108HL5001 4C369PS1472-01 F05013 Sil 108HL5003 AD1601 1 RCB SGAD>19' 19 S19108HL5003 4C369PS1472-01 F05013 SIl1 12HF5023 AD41 7 RCB OMB >19' 19 S111 12HF5023 5C369PS1472-A07 F05013 S11201 HL501OL AD501 2 FHB HHSI B -29 S19201HL5010 2F369PS1572-04 F05014 S11201 HL501OU AD501 2 FHB HHSI B -29 S19201 HL501 0 2F369PS1572-04 F05014 SI 1205HL5022 AD501 2 RCB IMB >-11 -11 S19205HL5022 2C369PS1472-02 F05014 SI1206HL5008 AD151 2 RCB IMB >-11 -11 S19206HL5008 4C369PS1472-05 F05014 S11206HL5012 AD501 2 RCB IMB >-11 -11 S19206HL5012 4C369PS1472-05 F05014 SI1207SS0001 AD501 2 RCB OMB >19' 19 S19207SS0001 4C369PS1472-05 F05014 S11208HL5005 AD1601 1 RCB SGBC>19' 19 S19208HL5005 4C369PS1472-05 F05014 S11217HL5009 AD1601 2 RCB OMB >-11 -2 S19217HL5009 5C369PS1472-03 F05016 S11301SS0005L AD501 2 FHB HHSI C -29 S19301 SS0005 2F369PS1572-06 F05015

Unit-1 Snubber IST Listing Pages 13 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg S11301 SS0005U AD501 2 FHB HHSI C -29 S19301 SS0005 2F369PS1572-06 F05015 SI1306HL5012 AD151 2 FHB HHSI C -29 S19306HL5012 2F369PS1572-05 F05015 SI1308HL5001 AD501 1 RCB IMB >-11 -11 S19308HL5001 4C369PS1472-07 F05015 SI1314HL5007 AD5501 2 RCB IMB >-11 -11 S19314HL5007 5C369PSI472-03 F05016 S11315HL5003 AD 12501 1 RCB SGBC>19' 19 S19315HL5003 5C369PS1472-03 F05016 S11315HL5004 AD5501 1 RCB SGBC>19' 19 S19315HL5004 5C369PS1472-03 F05016 SI1326HL5001 AD501 2 RCB SGBC>19' 19 S19326HL5001 4C369PS1472-07 F05015 SI1327HL5001 AD1601 2 RCB SGBC>19' 19 S19327HL5001 4C369PS1472-07 F05015 WL1019HF5001 AD71 7 RCB IMB >-11 -11 WL1019HF5001 7G369PWL477-A03 F05022 WL1284HL5002 AD1601 7 MAB RM 67C 10 WL9284HL5002 7M369PWL277-03 F05026 WL1284HL5003 AD501 7 MAB RM 53B 10 WL9284HL5003 7M369PWL277-03 F05026

ATTACHMENT 2 Unit 2 Snubber IST Listing Revision 0

Unit-2 Snubber IST Listing Pages 1 of 13 Mdtpns Tagtpns I Qc Snubber Model No Level Route I Location Elev Hang Dwg Iso Dwg Pipe Dwg 2C1 12XSNO001A HYD-1300KIP 2 RCB SGA-N/E 58 400290-0001 OXX 400290--00010XX 0957-0100008WN 2C1 12XSN0001 B HYD-1300KIP 2 RCB SGB-N/E 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN 2C1 12XSNO001C HYD-1300KIP 2 RCB SGC-N/E 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN 2C1 12XSNO001D HYD-1300KIP 2 RCB SGD-N/E 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN 2C1 12XSN0002A HYD-1300KIP 2 RCB SGA-N/W 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN 2C1 12XSN0002B HYD-1300KIP 2 RCB SGB-N/W 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN 2C1 12XSNO002C HYD-1300KIP 2 RCB SGC-NIW 58 400290-0001 OXX 400290--00010 XX 0957-0100008WN 2C1 12XSNO002D HYD-1300KIP 2 RCB SGD-N/W 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN 2C1 12XSN0003A HYD-1300KIP 2 RCB SGA-S/W 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN 2C1 12XSN0003B HYD-1300KIP 2 RCB SGB-SIVW 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN 2C1 12XSN0003C HYD-1300KIP 2 RCB SGC-S/W 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN 2C1 12XSNO003D HYD-1300KIP 2 RCB SGD-S/W 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN 2C112XSNO004A HYD-1300KIP 2 RCB SGA-S/E 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN 2C1 12XSNO004B HYD-1300KIP 2 RCB SGB-S/E 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN 2C1 12XSN0004C HYD-1 300KIP 2 RCB SGC-S/E 58 400290-0001 OXX 400290--00010XX 0957-0100008WN 2C1 12XSN0004D HYD-1300KIP 2 RCB SGD-S/E 58 400290-0001 OXX 400290--0001OXX 0957-0100008WN AF2006HL5003 AD5501 2 RCB SGAD>52' 19 AF9006HL5003 2C369PAF402-02 F00024 AF2006HL5015 AD5501 2 RCB SGAD>52' 19 AF9006HL5015 2C369PAF402-02 F00024 AF2006HL5018 AD5501 2 RCB OMB >19' 19 AF9006HL5018 2C369PAF402-02 F00024 AF2006HL5035N AD5501 2 RCB SGAD>68' 19 AF9006HL5035 2C369PAF402-02 F00024 AF2006HL5035S AD5501 2 RCB SGAD>68' 19 AF9006HL5035 2C369PAF402-02 F00024 AF2008HL5028 AD5501 2 RCB SGAD>68' 19 AF9008HL5028 2C369PAF402-02 F00024 AF2008HL5029 AD5501 2 RCB SGAD>68' 19 AF9008HL5029 2C369PAF402-02 F00024 AF2008HL5030 AD5501 2 RCB OMB >19' 19 AF9008HL5030 2C369PAF402-02 F00024 AF2008HL5041 N AD5501 2 RCB SGAD>68' 19 AF9008HL5041 2C369PAF402-02 F00024 AF2008HL5041S AD5501 2 RCB SGAD>68' 19 AF9008HL5041 2C369PAF402-02 F00024 AF201OHL5002L AD5501 2 RCB OMB >19' 19 AF901OHL5002 2C369PAF402-01 F00024 AF201OHL5002U AD5501 2 RCB OMB >19' 19 AF901OHL5002 2C369PAF402-01 F00024 AF201OHL5007E AD5501 2 RCB SGBC>52' 19 AF9010HL5007 2C369PAF402-01 F00024 AF201OHL5007W AD5501 2 RCB SGBC>52' 19 AF9010HL5007 2C369PAF402-01 F00024

Unit-2 Snubber IST Listing Pages 2 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg AF2010HL5008L AD5501 2 RCB SGBC>68' 19 AF9010HL5008 2C369PAF402-01 F00024 AF201OHL5008U AD5501 2 RCB SGBC>68' 19 AF9010HL5008 2C369PAF402-01 F00024 AF2010HL5009 AD1601 2 RCB SGBC>68' 19 AF9010HL5009 2C369PAF402-01 F00024 AF2010HL5017 AD5501 2 RCB SGBC>68' 19 AF901OHL5017 2C369PAF402-01 F00024 AF201OHL5018 AD1601 2 RCB SGBC>68' 19 AF901OHL5018 2C369PAF402-01 F00024 AF2010HL5020 AD1601 2 RCB SGBC>68' 19 AF9010HL5020 2C369PAF402-01 F00024 AF2010HL5026 AD1601 2 RCB SGBC>19' 19 AF9010HL5026 2C369PAF402-01 F00024 AF2010HL5035 AD1601 2 RCB SGBC>68' 19 AF9010HL5035 2C369PAF402-01 F00024 AF2012HL5014E AD1601 2 RCB SGBC>68' 19 AF9012HL5014 2C369PAF402-01 F00024 AF2012HL5014W AD1601 2 RCB SGBC>68' 19 AF9012HL5014 2C369PAF402-01 F00024 AF2012HL5017 AD5501 2 RCB SGBC>68' 19 AF9012HL5017 2C369PAF402-01 F00024 AF2012HL5018 AD1601 2 RCB SGBC>68' 19 AF9012HL5018 2C369PAF402-01 F00024 AF2012HL5020 AD1601 2 RCB SGBC>68' 19 AF9012HL5020 2C369PAF402-01 F00024 AF2012HL5024 AD5501 2 RCB OMB >19' 19 AF9012HL5024 2C369PAF402-01 F00024 AF2012HL5027 AD5501 2 RCB OMB >19' 19 AF9012HL5027 2C369PAF402-01 F00024 AF2012HL5038L AD5501 2 RCB SGBC>68' 19 AF9012HL5038 2C369PAF402-01 F00024 AF2012HL5038U AD5501 2 RCB SGBC>68' 19 AF9012HL5038 2C369PAF402-01 F00024 AF2054HL5004N AD151 3 IVC D 34 AF9054HL5004 5G369PAF602-1 0 F00024 AF2054HL5004S AD151 3 IVC D 34 AF9054HL5004 5G369PAF602-1 0 F00024 AF2061HL5001 AD1601 2 RCB SGAD>52' 19 AF9061HL5001 2C369PAF402-02 F00024 AF2061 HL5002 AD1601 2 RCB SGAD>68' 19 AF9061HL5002 2C369PAF402-02 F00024 AF2062HL5011 AD1601 2 RCB SGAD>68' 19 AF9062HL5011 2C369PAF402-02 F00024 AF2062HL5012 AD1601 2 RCB SGAD>68' 19 AF9062HL5012 2C369PAF402-02 F00024 AF2062HL5015 AD1601 2 RCB SGAD>52' 19 AF9062HL5015 2C369PAF402-02 F00024 AF2063HL5002 AD1601 2 RCB SGBC>68' 19 AF9063HL5002 2C369PAF402-01 F00024 AF2063HL5003 AD151 2 RCB SGBC>68' 19 AF9063HL5003 2C369PAF402-01 F00024 AF2063HL5005 AD1601 2 RCB SGBC>68' 19 AF9063HL5005 2C369PAF402-01 F00024 AF2063HL5006 AD1601 2 RCB SGBC>68' 19 AF9063HL5006 2C369PAF402-01 F00024 AF2064HL5004 AD1601 2 RCB SGBC>52' 19 AF9064HL5004 2C369PAF402-01 F00024 AP2003HF5001 AD41 2 MAB RM 108C 29 AP2003HF5001 5M369PAP287-AO1 Z47501

Unit-2 Snubber IST Listing Pages 3 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route I Location Elev Hang Dwg Iso Dwg Pipe Dwg CC2105HL5004 AD5501 3 RCB RHR HX 2A 37 CC9105HL5004 4C369PCC407-08 F05017 CC2105HL5009 AD5501 3 RCB OMB >52' 52 CC9105HL5009 4C369PCC407-08 F05017 CC2109HL5001 N AD501 3 MAB RM 106A 27 CC9109HL5001 5M362PCC207-07 F05017 CC2109HL5001 S AD501 3 MAB RM 106A 27 CC9109HL5001 5M362PCC207-07 F05017 CC21 10HL5001 AD 1601 3 MAB RM 106A 27 CC911 0HL5001 5M362PCC207-07 F05017 CC2136HL5002 AD501 7 MAB RM 64 10 CC9136HL5002 5M362PCC207-07 F05017 CC2205HL5007L AD501 3 RCB OMB >52' 52 CC9205HL5007 5M362PCC207-07 F05018 CC2205HL5007U AD501 3 RCB OMB >52' 52 CC9205HL5007 5M362PCC207-07 F05018 CC2206HL5008 AD501 3 RCB OMB >52' 52 CC9206HL5008 4C369PCC407-10 F05018 CC2209HL5002 AD1601 3 MAB RM 216 41 CC9209HL5002 5M369PCC207-11 F05018 CC2209HL5003 AD1601 3 MAB RM 216 41 CC9209HL5003 5M369PCC207-11 F05018 CC221OHL5001 AD1601 3 MAB RM 106A 27 CC921OHL5001 5M369PCC207-22 F05018 CC2215SS0002 AD501 3 RCB OMB >-11' -11 CC9215SS02 3C369PCC407-16 F05018 CC2220SS0002L AD501 3 MAB RM 64 10 CC9220SS0002 5M369PCC207-11 F05018 CC2220SS0002U AD501 3 MAB RM 64 10 CC9220SS0002 5M369PCC207-11 F05018 CC2309SS0002 AD1601 3 MAB RM 216 41 CC9309SS0002 5M362PCC207-01 F05019 CC2309SS0003L AD1601 3 MAB RM 216 41 CC9309SS0003 5M362PCC207-01 F05019 CC2309SS0003U AD1601 3 MAB RM 216 41 CC9309SS0003 5M362PCC207-01 F05019 CC231 1SS0001 AD1601 3 MAB RM 216 41 CC9311SS0001 5M369PCC207-08 F05019 CC2320HL5001 AD1601 3 MAB RM 216 41 CC9320HL5001 5M362PCC207-01 F05019 CC2425HL5016 AD151 3 FHB RM 208 30 CC9425HL5016 5F369PCC507-01 F05020 CC2613SS0003 AD151 7 RCB OMB >37' 37 CC9613SS0003 5C369PCC407-03 F05021 CV2002HL5002 AD71 2 RCB SGBC>52' 19 CV9002HL5002 4C369PCV417-04 F05005 CV2002HL5003 AD71 2 RCB SGBC>19' 19 CV9002HL5003 4C369PCV417-04 F05005 CV2002HL5004 AD71 2 RCB SGBC>19' 19 CV9002HL5004 4C369PCV417-04 F05005 CV2002HL5007 AD151 2 RCB SGBC>19' 19 CV9002HL5007 4C369PCV417-04 F05005 CV2002HL5008 AD71 2 RCB SGBC>37' 19 CV9002HL5008 4C369PCV417-04 F05005 CV2002HL5009 AD151 2 RCB SGBC>37' 19 CV9002HL5009 4C369PCV417-04 F05005 CV2002HL5010 AD151 2 RCB SGBC>19' 19 CV9002HL501 0 4C369PCV417-04 F05005 CV2002HL5012 AD71 2 RCB SGBC>37' 19 CV9002HL5012 4C369PCV417-04 F05005

Unit-2 Snubber IST Listing Pages 4 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route I Location Elev Hang Dwg Iso Dwg Pipe Dwg CV2002HL5019 AD151 2 RCB SGBC>19' 19 CV9002HL5019 4C369PCV417-04 F05005 CV2002HL5020 AD151 2 RCB SGBC>19' 19 CV9002HL5020 4C369PCV417-04 F05005 CV2002HL5021 AD501 2 RCB SGBC>19' 19 CV9002HL5021 4C369PCV417-04 F05005 CV2003HF5003 AD151 2 RCB RGN HX 37 CV2003HF5003 5C369PCV417-A09 F05005 CV2003HL5003N AD151 2 RCB RGN HX 37 CV2003HL5003 4C369PCV417-04 F05005 CV2003HL5003S AD151 2 RCB RGN HX 37 CV2003HL5003 4C369PCV417-04 F05005 CV2004H F5001 AD41 2 RCB RGN HX 37 CV2004HF5001 5C369PCV417-A09 F05005 CV2005HF5001 AD41 2 RCB RGN HX 37 CV2005HF5001 5C369PCV417-A09 F05005 CV2006HL5037 AD 1601 2 MAB RM 108C 29 CV9006HL5037 4M369PCV217-04 F05005 CV201 1HL5009 AD71 2 MAB RM 49 10 CV901 1HL5009 4M369PCV217-04 F05006 CV2086SS0002 AD71 2 MAB RM 110 29 CV9086SS0002 2M369PCV217-05 F05006 CV2088H L5002 AD41 2 MAB RM 31 10 CV9088HL5002 4M369PCV217-04 F05006 CV2116HL5018 AD71 2 MAB RM 108C 29 CV9116HL5018 2M369PCV217-20 F05007 CV2117HF5054 AD41 2 RCB PZR 37 CV2117HF5054 4C369PCV417-A02 F05005 CV2117HL5005 AD501 2 RCB SGBC>37' 19 CV9117HL5005 4C369PCV417-02 F05005 CV2117SS0006 AD1601 2 RCB SGBC>37' 19 CV9117SS0006 4C369PCV417-02 F05005 CV2121HS5007 AD41 1 RCB PZR 37 CV9121HS5007 4C369PCV417-A02 F05005 CV2121 HS5009 AD151 1 RCB PZR 37 CV9121 HS5009 4C369PCV417-A02 F05005 CV2121HS5010 AD151 1 RCB PZR 37 CV9121 HS5010 4C369PCV417-A02 F05005 FC2009SS0001 AD41 3 FHB RM 110 21 FC9009SS0001 4F369PFC530-03 F05028 FC201 1HL5001 AD1601 2 FHB RM 110 21 FC901 1HL5001 4F369PFC530-02 F05028 FC2012HL5002 AD501 3 FHB RM 110 21 FC9012HL5002 4F369PFC530-02 F05028 FW2012HL5002E AD5501 2 RCB SGAD>37' 19 FW9012HL5002 2C369PFW433-01 F00062 FW2012HL5002W AD5501 2 RCB SGAD>37' 19 FW9012HL5002 2C369PFW433-01 F00062 FW2012HL5003 AD12501 2 RCB SGAD>37' 19 FW9012HL5003 2C369PFW433-01 F00062 FW2012HL5005L AD5501 2 RCB OMB >37' 37 FW9012HL5005 2C369PFW433-01 F00062 FW2012HL5005U AD5501 2 RCB OMB >37' 37 FW9012HL5005 2C369PFW433-01 F00062 FW2012HL5011 AD5501 2 RCB SGAD>19' 19 FW9012HL5011 2C369PFW433-01 F00062 FW2012HL5016 AD12501 2 RCB SGAD>37' 19 FW2012HL5016 2C369PFW433-01 F00062 FW2014HL5001E AD5501 2 RCB SGBC>37' 19 FW9014HL5001 2C369PFW433-01 F00062

Unit-2 Snubber IST Listing Pages 5 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route I Location Elev Hang Dwg Iso Dwg Pipe Dwg FW2014HL5001W AD5501 2 RCB SGBC>37' 19 FW9014HL5001 2C369PFW433-01 F00062 FW2014HL5002 AD12501 2 RCB SGBC>37' 19 FW9014HL5002 2C369PFW433-01 F00062 FW2014HL5003L AD5501 2 RCB RGN HX 37 FW9014HL5003 2C369PFW433-01 F00062 FW2014H L5003U AD5501 2 RCB RGN HX 37 FW9014HL5003 2C369PFW433-01 F00062 FW2014HL5009 AD12501 2 RCB SGBC>37' 19 FW9014HL5009 2C369PFW433-01 F00062 FW2014HL5012 AD5501 2 RCB SGBC>19' 19 FW9014HL5012 2C369PFW433-01 F00062 FW2016HL5003 AD5501 2 RCB RGN HX 37 FW9016HL5003 2C369PFW433-11 F00062 FW2016HL5004 AD5501 2 RCB SGBC>19' 19 FW9016HL5004 2C369PFW433-01 F00062 FW2016HL5006 AD5501 2 RCB SGBC>52' 19 FW9016HL5006 2C369PFW433-01 F00062 FW2016HL5007 AD5501 2 RCB SGBC>19' 19 FW9016HL5007 2C369PFW433-01 F00062 FW2016HL5008 AD5501 2 RCB RGN HX 37 FW9016HL5008 2C369PFW433-01 F00062 FW2016HL5009 AD12501 2 RCB SGBC>37' 19 FW9016HL5009 2C369PFW433-01 F00062 FW2016HL5010 AD5501 2 RCB SGBC>37' 19 FW9016HL5010 2C369PFW433-01 F00062 FW2016SH0001 AD5501 2 RCB SGBC>19" 19 FW9016SH0001 2C369PFW433-01 F00062 FW2016SS0006 AD5501 2 RCB SGBC>52' 19 FW9016SS0006 2C369PFW433-01 F00062 FW201 8HL5003 AD5501 2 RCB OMB >37' 37 FW9018HL5003 2C369PFW433-01 F00062 FW2018HL5004 AD5501 2 RCB SGAD>19' 19 FW9018HL5004 2C369PFW433-01 F00062 FW201 8HL5006L AD5501 2 RCB OMB >37' 37 FW9018HL5006 2C369PFW433-01 F00062 FW201 8HL5006U AD5501 2 RCB OMB >37' 37 FW9018HL5006 2C369PFW433-01 F00062 FW2018HL5007N AD5501 2 RCB SGAD>37' 19 FW9018HL5007 2C369PFW433-01 F00062 FW201 8HL5007S AD5501 1 RCB SGAD>37' 19 FW9018HL5007 2C369PFW433-01 F00062 FW201 8HL5008 AD12501 2 RCB SGAD>37' 19 FW9018HL5008 2C369PFW433-01 F00062 FW201 8HL5009 AD12501 2 RCB SGAD>37' 19 FW9018HL5009 2C369PFW433-01 F00062 FW2018SS0001 AD5501 2 RCB SGAD>19' 19 FW9018SS0001 2C369PFW433-01 F00062 FW2018SS0006 AD5501 2 RCB SGAD>52' 19 FW9018SS0006 2C369PFW433-01 F00062 FW2018SS0007 AD12501 2 RCB SGAD>37' 19 FW9018SS0007 2C369PFW433-01 F00062 FW2029HL5002E AD1601 2 IVC A 44 FW9029HL5002 2G369PFW633-02 F00062 FW2029H L5002W AD1601 2 IVC A 44 FW9029HL5002 2G369PFW633-02 F00062 FW2029H L5003 AD1601 2 IVC A 44 FW9029HL5003 2G369PFW633-02 F00062 FW2030H L5002E AD 1601 2 IVC B 44 FW9030H L5002 2G369PFW633-03 F00062

Unit-2 Snubber IST Listing Pages 6 of 13 Mdtpns Tagtpns I Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg FW2030H L5002W AD 1601 2 IVC B 44 FW9030H L5002 2G369PFW633-03 F00062 FW2030H L5003 AD 1601 2 IVC B 44 FW9030H L5003 2G369PFW633-03 F00062 FW2031 HL5002E AD1601 2 IVC C 44 FW9031 HL5002 2G369PFW633-04 F00062 FW2031 HL5002W AD1601 2 IVC C 44 FW9031 HL5002 2G369PFW633-04 F00062 FW2031 HL5003 AD1601 2 IVC C 44 FW9031 HL5003 2G369PFW633-04 F00062 FW2032H L5002E AD1601 2 IVC D 44 FW9032H L5002 2G369PFW633-01 F00062 FW2032H L5002W AD1601 2 IVC D 44 FW9032H L5002 2G369PFW633-01 F00062 FW2032H L5003 AD1601 2 IVC D 44 FW9032H L5003 2G369PFW633-01 F00062 FW2117HL5001 AD41 2 IVC C 34 FW9117HL5001 2G369PFW633-05 F00063 FW2117HL5003 AD41 2 IVC C 34 FW9117HL5003 2G369PFW633-05 F00063 FW2117HL5004 AD41 2 IVC C 44 FW9117HL5004 2G369PFW633-05 F00063 FW2119HL5001 AD41 2 IVC B 34 FW9119HL5001 2G369PFW633-05 F00063 FW2119HL5003 AD41 2 IVC B 34 FW9119HL5003 2G369PFW633-05 F00063 FW2119HL5004 AD41 2 IVC B 44 FW9119HL5004 2G369PFW633-05 F00063 FW2121 HL5001 AD41 2 IVC A 34 FW9121 HL5001 2G369PFW633-05 F00063 FW2121 HL5003 AD41 2 IVC A 34 FW9121 HL5003 2G369PFW633-05 F00063 FW2121 HL5004 AD41 2 IVC A 34 FW9121 HL5004 2G369PFW633-05 F00063 FW2123HL5001 AD41 2 IVC D 34 FW9123HL5001 2G369PFW633-05 F00063 FW2123HL5003 AD41 2 IVC D 34 FW9123HL5003 2G369PFW633-05 F00063 FW2123HL5004 AD41 2 IVC D 34 FW9123HL5004 2G369PFW633-05 F00063 MD2147HF5002 AD71 7 IVC A 44 MD2147HF5002 9G369PMD645-AO1 F00055 MD2148HF5002 AD71 7 IVC B 44 MD2148HF5002 9G369PMD645-AO1 F00055 MD2149HF5002 AD71 7 IVC C 44 MD2149HF5002 9G369PMD645-AO1 F00055 MD2150HF5002 AD71 7 IVC D 44 MD2150HF5002 9G369PMD645-AO1 F00055 MS2001 HL5004 AD5501 2 RCB OMB >68' 68 MS9001HL5004 2C369PMS446-01 F00016 MS2001 HL5007 AD12501 2 RCB SGAD>68' 19 MS9001HL5007 2C369PMS446-01 F00016 MS2001 HL501 OL AD1601 2 IVC A 51 MS9001HL5010 2G369PMS646-06 F00016 MS2001 HL501 OU AD1601 2 IVC A 51 MS9001HL5010 2G369PMS646-06 F00016 MS2001HL5011E AD5501 2 IVC A 51 MS9001 HL5011 2G369PMS646-06 F00016 MS2001 HL501 1W AD5501 2 IVC A 51 MS9001HL5011 2G369PMS646-06 F00016

Unit-2 Snubber IST Listing Pages 7 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg MS2001 HL5012L AD1601 2 IVC A 51 MS9001 HL5012 2G369PMS646-06 F00016 MS2001 HL5012U AD1601 2 IVC A 51 MS9001 HL5012 2G369PMS646-06 F00016 MS2001HL5015 AD5501 2 RCB SGAD>83' 19 MS9001 HL5015 2C369PMS446-01 F00016 MS2002HL5006 AD5501 2 RCB OMB >68' 68 MS9002HL5006 2C369PMS466-02 F00016 MS2002HL5007 AD12501 2 RCB SGBC>68' 19 MS9002HL5007 2C369PMS446-02 F00016 MS2002HL5010L AD 1601 2 IVC B 51 MS9002HL5010 2G369PMS646-07 F00016 MS2002HL501OU AD1601 2 IVC B 51 MS9002HL5010 2G369PMS646-07 F00016 MS2002HL501 1E AD5501 2 IVC B 51 MS9002HL5011 2G369PMS646-07 F00016 MS2002HL501 1W AD5501 2 IVC B 51 MS9002HL5011 2G369PMS646-07 F00016 MS2002HL5012L AD1601 2 IVC B 51 MS9002HL5012 2G369PMS646-07 F00016 MS2002HL5012U AD1601 2 IVC B 51 MS9002HL5012 2G369PMS646-07 F00016 MS2002HL5015 AD5501 2 RCB SGBC>83' 19 MS9002HL5015 2C369PMS446-02 F00016 MS2002HL5016 AD5501 2 RCB SGBC>83' 19 MS9002HL5016 2C369PMS446-02 F00016 MS2003HL5004 AD5501 2 RCB OMB >68' 68 MS9003HL5004 2C369PMS446-03 F00016 MS2003HL5012 AD12501 2 *RCB SGBC>68' 19 MS9003HL5012 2C369PMS446-03 F00016 MS2003HL5013 AD5501 2 RCB SGBC>83' 19 MS9003HL5013 2C369PMS446-03 F00016 MS2003HL5014 AD5501 2 RCB SGBC>83' 19 MS9003HL5014 2C369PMS446-03 F00016 MS2003HL5015L AD1601 2 IVC C 51 MS9003HL5015 2G369PMS646-08 F00016 MS2003HL5015U AD1601 2 IVC C 51 MS9003HL5015 2G369PMS646-08 F00016 MS2003HL5016E AD5501 2 IVC C 51 MS9003HL5016 2G369PMS646-08 F00016 MS2003HL5016W AD5501 2 IVC C 51 MS9003HL5016 2G369PMS646-08 F00016 MS2003HL5017L AD1601 2 IVC C 51 MS9003HL5017 2G369PMS646-08 F00016 MS2003HL5017U AD1601 2 IVC C 51 MS9003HL5017 2G369PMS646-08 F00016 MS2004HL5007 AD5501 2 RCB OMB >68' 68 MS9004HL5007 2C369PMS446-04 F00016 MS2004HL5012 AD12501 2 RCB SGAD>68' 19 MS9004HL5012 2C369PMS446-04 F00016 MS2004HL5013 AD12501 2 RCB PZR 37 MS9004HL5013 2C369PMS446-04 F00016 MS2004HL5014 AD12501 2 RCB SGAD>83' 19 MS9004HL5014 2C369PMS446-04 F00016 MS2004HL5015L AD1601 2 IVC D 51 MS9004HL5015 2G369PMS646-09 F00016 MS2004HL5015U AD1601 2 IVC D 51 MS9004HL5015 2G369PMS646-09 F00016 MS2004HL5016E AD5501 2 IVC D 51 MS9004HL5016 2G369PMS646-09 F00016

Unit-2 Snubber IST Listing Pages 8 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg MS2004HL5016W AD5501 2 IVC D 51 MS9004HL5016 2G369PMS646-09 F00016 MS2004HL5017L AD 1601 2 IVC D 51 MS9004HL5017 2G369PMS646-09 F00016 MS2004HL5017U AD1601 2 IVC D 51 MS9004HL5017 2G369PMS646-09 F00016 MS2005SS0001 N AD5501 7 TGB B 55 MS9005SS0001 7G369PMS846-05 F00016 MS2005SS0001 S AD5501 7 TGB B 55 MS9005SS0001 7G369PMS846-05 F00016 MS2005SS0002E AD5501 7 TGB B 29 MS9005SS0002 7G369PMS846-05 F00016 MS2005SS0002W AD5501 7 TGB B 29 MS9005SS0002 7G369PMS846-05 F00016 MS2006SS0001 N AD5501 7 TGB B 55 MS9006SS0001 7G369PMS846-06 F00016 MS2006SS0001S AD5501 7 TGB B 55 MS9006SS0001 7G369PMS846-06 F00016 MS2006SS0002E AD5501 7 TGB B 29 MS9006SS0002 7G369PMS846-06 F00016 MS2006SS0002W AD5501 7 TGB B 29 MS9006SS0002 7G369PMS846-06 F00016 MS2007SS0002E AD5501 7 TGB B 29 MS9007SS0002 7G369PMS846-06 F00016 MS2007SS0002W AD5501 7 TGB B 29 MS9007SS0002 7G369PMS846-06 F00016 MS2008HL5001 AD5501 7 TGB B 55 MS9008HL5001 7G369PMS846-05 F00016 MS2008SS0001 E AD5501 7 TGB B 29 MS9008SS0001 7G369PMS846-05 F00016 MS2008SS0001W AD5501 7 TGB B 29 MS9008SS0001 7G369PMS846-05 F00016 MS2013HL5002E AD5501 7 TGB B 55 MS9013HL5002 7G369PMS846-08 F00016 MS2013HL5002W AD5501 7 TGB B 55 MS9013HL5002 7G369PMS846-08 F00016 MS2013HL5003 AD5501 7 TGB B 55 MS9013HL5003 7G3G9PMS846-05 F00016 MS2013HL5004 AD5501 7 TGB B 55 MS9013HL5004 7G369PMS846-05 F00016 MS2013SS0002E AD5501 7 TGB B 55 MS9013SS0002 7G369PMS846-09 F00016 MS2013SS0002W AD5501 7 TGB B 55 MS9013SS0002 7G369PMS846-09 F00016 MS2051 HL5009 AD71 3 IVC D 10 MS9051 HL5009 4G369PMS646-05 F00024 PS2020HF5002 AD41 7 MAB RM 108C 29 PS2020HF5002 5M369PPS285-AO1 Z00045 RC2000SS0001 AD151 RCB PZR 37 RC2000SS0001 4C369PRC457-07 F05003 RC2003HL5006 AD501 1 RCB PZR 37 RC9003HL5006 1C369PRC457-06 F05003 RC2003HL5009 AD501 1 RCB PZR 37 RC9003HL5009 1C369PRC457-06 F05003 RC2014HL5001 AD5501 7 RCB PZR 37 RC9014HL5001 7C369PRC457-02 F05004 RC2014HL5003E AD5501 7 RCB PZR 37 RC9014HL5003 7C769PRC457-02 F05004 RC2014HL5003W AD5501 7 RCB PZR 37 RC9014HL5003 7C369PRC457-02 F05004

Unit-2 Snubber IST Listing Pages 9 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route I Location Elev Hang Dwg Iso Dwg Pipe Dwg RC2014HL5005N AD5501 7 RCB PZR 37 RC9014HL5005 7C369PRC457-02 F05004 RC2014HL5005S AD5501 7 RCB PZR 37 RC9014HL5005 7C369PRC457-02 F05004 RC2014HL5006L AD5501 7 RCB PZR 37 RC9014HL5006 7C369PRC457-02 F05004 RC2014HL5006U AD5501 7 RCB PZR 37 RC9014HL5006 7C369PRC457-02 F05004 RC2014HL5009 AD501 7 RCB PZR 37 RC9014HL5009 7C369PRC457-02 F05004 RC2014HL5012N AD5501 7 RCB PZR 37 RC9014HL5012 7C369PRC457-02 F05004 RC2014HL5012S AD5501 7 RCB PZR 37 RC9014HL5012 7C369PRC457-02 F05004 RC2014HL5013 AD1601 7 RCB PZR 37 RC9014HL5013 7C369PRC457-02 F05004 RC2014HL5015 AD1601 7 RCB PZR 37 RC9014HL5015 7C369PRC457-02 F05004 RC2014HL5019N AD5501 7 RCB PZR 19 RC9014HL5019 7C369PRC457-02 F05004 RC2014HL5019S AD5501 7 RCB PZR 19 RC9014HL5019 7C369PRC457-02 F05004 RC2014HL5026 AD501 7 RCB PZR 19 RC9014HL5026 7C369PRC457-02 F05004 RC2014HL5028 AD1601 7 RCB PZR 19 RC9014HL5028 7C369PRC457-02 F05004 RC2112HL5002 AD5501 1 RCB SGAD>19' 19 RC9112HL5002 4C369PRC457-09 F05001 RC2123HL5013 AD501 1 RCB PZR 37 RC9123HL5013 4C369PRC457-07 F05001 RC2125HL5001 AD5501 1 RCB IMB >-11' -11 RC9125HL5001 4C369PRC457-10 F05001 RC2125HL5008 AD1601 1 RCB IMB >-11' -11 RC9125HL5008 4C369PRC457-10 F05001 RC2221 HL5001 AD1601 1 RCB IMB >-11' -11 RC9221 HL5001 4C369PRC457-10 F05001 RC2221 HL5003 AD5501 1 RCB IMB >-11' -11 RC9221 HL5003 4C369PRC457-10 F05001 RC2221 HL5004 AD5501 1 RCB SGBC>19' 19 RC9221 HL5004 4C369PRC457-10 F05001 RC2221 HL5005 AD5501 1 RCB SGBC>19' 19 RC9221 HL5005 4C369PRC457-10 F05001 RC2221 HL5006 AD5501 1 RCB IMB >-11' -11 RC9221HL5006 4C369PRC457-10 F05001 RC2221 HL5007 AD5501 1 RCB IMB >-11' -11 RC9221 HL5007 4C369PRC457-10 F05001 RC2320HL5002 AD1601 1 RCB SGBC>19' 19 RC9320HL5002 4C369PRC457-04 F05001 RC2320HL5004 AD501 RCB SGBC>19' 19 RC9320HL5004 4C369PRC457-04 F05001 RC2422HL5019 AD501 1 RCB SGAD>52' 19 RC9422HL5019 1C369PRC457-06 F05001 RH21 01 HL5001 AD1601 1 RCB VLV RM -2 RH9101 HL5001 4C369PRH459-04 F20000 RH21 01 HL5002 AD1601 1 RCB VLV RM -2 RH9101 HL5002 4C369PRH459-04 F20000 RH2101 HL5003 AD1601 1 RCB VLV RM 19 RH9101 HL5003 4C369PRH459-04 F20000 RH2101 HL5006 AD5501 1 RCB SGAD>19' 19 RH9101 HL5006 4C369PRC459-04 F20000

Unit-2 Snubber IST Listing Pages 10 of 13 Mdtpns Tagtpns/ Qc Snubber Model No Level Route I Location Elev Hang Dwg Iso Dwg Pipe Dwg RH21 01 HL5009 AD1601 1 RCB SGAD>19' 19 RH9101 HL5009 4C369PRH459-04 F20000 RH21 10HL5002 AD501 2 RCB SGAD>19' 19 RH91 10HL5002 4C369PRH459-03 F20000 RH2201 HL5001 AD1601 1 RCB VLV RM -2 RH9201 HL5001 4C369PRH459-07 F20000 RH2201 HL5006 AD5501 1 RCB VLV RM -2 RH9201HL5006 4C369PRH459-07 F20000 RH2202SS0002 AD1601 2 RCB VLV RM -2 RH9202SS0002 4C369PRH459-07 F20000 RH2203HL5001 AD501 2 RCB VLV RM 19 RH9203HL5001 2C369PRH459-02 F20000 RH2204HL5001 AD501 2 RCB VLV RM 19 RH9204HL5001 2C369PRH459-02 F20000 RH221 1HL5002L AD501 2 RCB SGBC>19' 19 RH921 1HL5002 4C369PRH459-07 F20000 RH221 1HL5002U AD501 2 RCB SGBC>19' 19 RH921 1HL5002 4C369PRH459-07 F20000 RH2303HL5007 AD501 2 RCB VLV RM 19 RH9303HL5007 2C369PRH459-05 F20000 RH2303HL5009 AD501 2 RCB VLV RM -2 RH9303HL5009 2C369PRH459-05 F20000 RH2306SS0001 AD501 2 RCB VLV RM -2 RH9306SS0001 4C369PRH459-06 F20000 RH2312HL5002 AD501 2 RCB VLV RM 19 RH9312HL5002 4C369PRH459-01 F20000 RH2313HL5003L AD501 2 RCB SGBC>19' 19 RH9313HL5003 4C369PRH459-06 F20000 RH2313HL5003U AD501 2 RCB SGBC>19' 19 RH9313HL5003 4C369PRH459-06 F20000 SB2101HL5007 AD1601 2 RCB OMB >19' 19 SB9101 HL5007 2C369PSB468-02 F20001 SB2101HL5012 AD501 2 RCB SGAD>19' 19 SB9101 HL5012 2C369PSB468-02 F20001 SB2101HL5017 AD1601 2 RCB OMB >19' 19 SB9101 HL5017 2C369PSB468-02 F20001 SB2101HL5019 AD501 2 IVC A 10 SB9101HL5019 5G369PSB668-03 F20001 SB2101HL5020 AD501 2 IVC A 10 SB9101 HL5020 5G369PSB668-03 F20001 SB2101HL5022 AD501 2 IVC A 10 SB9101 HL5022 5G369PSB668-03 F20001 SB2104HL5001 AD501 7 IVC A 10 SB9104HL5001 5G369PSB668-03 F20001 SB2104HL5002 AD501 7 IVC A 10 SB9104HL5002 5G369PSB668-03 F20001 SB2104HL5006 AD501 7 IVC A 10 SB9104HL5006 5G369PSB668-03 F20001 SB2105HL5001 AD71 7 IVC A 10 SB9105HL5001 5G369PSB668-03 F20001 SB2107HF5001 AD41 2 IVC A 10 SB2107HF5001 7G369PSB668-AO1 F20001 SB2201HL5004 AD1601 2 RCB OMB >19' 19 SB9201 HL5004 2C369PSB468-02 F20001 SB2201HL5010 AD1601 2 RCB OMB >19' 19 SB9201 HL5010 2C369PSB468-02 F20001 SB2201HL5013 AD501 2 RCB SGBC>19' 19 SB9201 HL5013 2C369PSB468-02 F20001 SB2201HL5017 AD501 2 IVC B 10 SB9201 HL5017 5G369PSB668-05 F20001

Unit-2 Snubber IST Listing Pages 11 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route I Location Elev Hang Dwg Iso Dwg Pipe Dwg S B2201HL5018 AD501 2 IVC B 10 SB9201 HL5018 5G369PSB668-05 F20001 SB2201HL5020 AD501 2 IVC B 10 SB9201 HL5020 5G369PSB668-05 F20001 SB2202HF5002 AD41 2 RCB SGBC>19' 19 SB2202HF5002 2C362PSB468-A05 F20001 SB2204HL5001 AD501 7 IVC B 10 SB9204H L5001 5G369PSB668-05 F20001 SB2204HL5002 AD501 7 IVC B 10 SB9204HL5002 5G369PSB668-05 F20001 SB2205HL5003 AD151 7 IVC B 10 SB9205HL5003 5G369PSB668-05 F20001 SB2207HF5001 AD41 7 IVC B 10 SB2207HF5001 7G369PSB668-AO1 F20001 SB2250HF5003 AD41 2 RCB SGBC>19' 19 SB2250HF5003 2C362PSB468-A05 F20001 SB2274HL5002L AD151 7 IVC B 10 SB9274HL5002 5G369PSB668-05 F20002 SB2274HL5002U AD151 7 IVC B 10 SB9274HL5002 5G369PSB668-05 F20002 SB2301HL5003L AD501 2 RCB OMB >19' 19 SB9301 HL5003 2C369PSB468-02 F20001 SB2301 HL5003U AD501 2 RCB OMB >19' 19 SB9301 HL5003 2C369PSB468-02 F20001 SB2301HL5011L AD501 2 RCB SGBC>19' 19 SB9301 HL5011 2C369PSB468-02 F20001 SB2301HL5011U AD501 2 RCB SGBC>19' 19 SB9301HL5011 2C369PSB468-02 F20001 SB2301HL5012N AD151 2 RCB SGBC>19' 19 SB9301 HL5012 2C369PSB468-02 F20001 SB2301HL5012S AD151 2 RCB SGBC>19' 19 SB9301 HL5012 2C369PSB468-02 F20001 SB2301HL5018 AD501 2 IVC C 10 SB9301 HL5018 5G369PSB668-07 F20001 SB2301 HL5020 AD501 2 IVC C 10 SB9301HL5020 5G369PSB668-07 F20001 SB2301HL5021 AD501 2 IVC C 10 SB9301 HL5021 5G369PSB668-07 F20001 SB2302HF5003 AD151 2 RCB SGBC>19' 19 SB2302HF5003 2C369PSB468-A04 F20001 SB2303HF5005 AD151 2 RCB SGBC>37' 19 SB2303HF5005 2C369PSB468-A04 F20001 SB2304HL5001 AD501 7 IVC C 10 SB9304HL5001 5G369PSB668-07 F20001 SB2304HL5002 AD501 7 IVC C 10 SB9304HL5002 5G369PSB668-07 F20001 SB2304HL5006 AD501 7 IVC C 10 SB9304HL5006 5G369PSB668-07 F20001 SB2350HF5016 AD41 2 RCB SGBC>19' 19 SB2350HF5016 2C362PSB468-A05 F20001 SB2401 HL5003 AD1601 2 RCB OMB >19' 19 SB9401 HL5003 2C369PSB468-02 F20001 SB2401HL5011 AD1601 2 RCB OMB >19' 19 SB9401 HL5011 2C369PSB468-02 F20001 SB2401HL5012 AD501 2 RCB SGAD>19' 19 SB9401 HL5012 2C369PSB468-02 F20001 SB2401 HL5016L AD151 2 RCB SGAD>19' 19 SB9401 HL5016 2C369PSB468-02 F20001 SB2401HL5016U AD151 2 RCB SGAD>19' 19 SB9401 HL5016 2C369PSB468-02 F20001

Unit-2 Snubber IST Listing Pages 12 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route I Location Elev Hang Dwg Iso Dwg Pipe Dwg SB2401HL5019 AD501 2 RCB SGAD>19' 19 SB9401 HL5019 2C369PSB468-02 F20001 SB2401HL5020 AD501 2 IVC D 10 SB9401 HL5020 5G369PSB668-01 F20001 SB2401HL5022 AD501 2 IVC D 10 SB9401 HL5022 5G369PSB668-01 F20001 SB2401HL5023 AD501 2 IVC D 10 SB9401HL5023 5G369PSB668-01 F20001 SB2402HF5002 AD71 2 RCB SGAD>37' 19 SB2402HF5002 2C369PSB468-A04 F20001 SB2402HF5004 AD71 2 RCB SGAD>37' 19 SB2402HF5004 2C369PSB468-A04 F20001 SB2403HF5002 AD151 2 RCB SGAD>19' 19 SB2403HF5002 2C368PSB468-A04 F20001 SB2404HL5001 AD501 7 IVC D 10 SB9404HL5001 5G369PSB668-01 F20001 SB2404HL5002 AD501 7 IVC D 10 SB9404HL5002 5G369PSB668-01 F20001 SB2406HL5007 AD41 7 IVC D 10 SB9406HL5007 5G369PSB668-01 F20001 SB2407HF5001 AD41 7 IVC D 10 SB2407HF5001 7G369PSB668-AO1 F20001 SB2474HL5002 AD501 7 IVC D 10 SB9474HL5002 5G369PSB668-01 F20002 S12101 SS0008L AD501 2 FHB HHSI A -29 SI9101SS0008 2F369PS1572-03 F05013 S12101 SS0008U AD501 2 FHB HHSI A -29 SI9101SS0008 2F369PS1572-03 F05013 S12107HL5001 N AD501 2 RCB OMB >19' 19 S19107HL5001 4C369PS1472-01 F05013 S12107HL5001S AD501 2 RCB OMB >19' 19 S19107HL5001 4C369PS1472-01 F05013 S12107SS0061 AD501 2 RCB OMB >19' 19 S19107SS0061 4C369PS1472-01 F05013 S12108HL5001 AD 1601 1 RCB SGAD>19' 19 S19108HL5001 4C369PS1472-01 F05013 S12108HL5003 AD501 1 RCB SGAD>19' 19 S19108HL5003 4C369PS1472-01 F05013 S12201 HL501 OL AD501 2 FHB HHSI B -29 S19201 HL5010 2F369PS1572-04 F05014 S12201 HL501 OU AD501 2 FHB HHSI B -29 S19201 HL5010 2F369PS1572-04 F05014 S12205HL5022 AD501 2 RCB IMB >-11' -11 S19205HL5022 2C369PS1472-02 F05014 S12206HL5008 AD151 2 RCB IMB >-11' -11 S19206HL5008 4C369PS1472-05 F05014 S12206HL5012 AD501 2 RCB IMB >-11' -11 S19206HL5012 4C369PS1472-05 F05014 S12207SS0001 AD501 2 RCB OMB >19' 19 S19207SS0001 4C369PS1472-05 F05014 S12208HL5005 AD1601 1 RCB SGBC>19' 19 S19208HL5005 4C369PS1472-05 F05014 S12217HL5009 AD1601 2 RCB OMB >-11' -2 S19217HL5009 5C369PS1472-03 F05016 S12301 SS0005L AD501 2 FHB HHSI C -29 S19301SS0005 2F369PS1572-06 F05015 S12301 SS0005U AD501 2 FHB HHSI C -29 S19301SS0005 2F369PS1572-06 F05015 AD151 2 FHB HHSI C -29 S19306HL5012 2F369PS1572-05 F05015 S12306HL5012

Unit-2 Snubber IST Listing Pages 13 of 13 Mdtpns Tagtpns / Qc Snubber Model No Level Route / Location Elev Hang Dwg Iso Dwg Pipe Dwg S12308HL5001 AD501 1 RCB IMB >-11' -11 S19308HL5001 4C369PS1472-07 F05015 S12314HL5007 AD5501 2 RCB IMB >-11' -11 S19314HL5007 5C369PS1472-03 F05016 S12315HL5003 AD12501 1 RCB SGBC>19' 19 S19315HL5003 5C369PS1472-03 F05016 S12315HL5004 AD5501 1 RCB SGBC>19' 19 S19315HL5004 5C369PS1472-03 F05016 S12326HL5001 AD501 2 RCB SGBC>19' 19 S19326HL5001 4C369PS1472-07 F05015 S12327HL5001 AD1601 2 RCB SGBC>19' 19 S19327HL5001 4C369PS1472-07 F05015 WL2019HF5001 AD71 7 RCB IMB >-11' -11 WL2019HF5001 7G369PWL477-A03 F05022

ATTACHMENT 3 Snubber Code Cases - Information Only Revision 0

ASMEOM CODE-2004 CODE CASE OMN-13 (04) Requirements for Extending Snubber Inservice Visual Examination Interval at LWR Power Plants This Code Case shall expire on February 12, 2007 unless previously annulled or reaffirmed.

inquint: With the low rate of problem identificatior LCorrelation Table through the visual examination process, can the visua.

1995 Edition and examination interval allowed in Table ISTD 6__2-1 oi 1996 Addenda 1998 Edition the OM Code, Subsection ISTD, 1995 Edition 199k Addenda be extended? I57T 1.13 ISTD-1750 ISTD 6 ISTD-4 200 Reply: Yes, provided that the following additiona L 157D 6.1. 6.2, 6.3, 6.4 ISTD-4210, 4220, 4230, 4240 service life monitoring requirements are met. 1ST6.5.1 iSTD-4251 ISM 6.3.2(a) IS-.D-4 252 (a)

Applicability: ASMVE OM Code 1995 Edition with 199( 0ISTD 6.5.2(b) 1STD-,252(b)

Addenda and later editions and addenda. ISTD 6.5.2(c) ISTD-4252(c)

ISTD 8 IS7-6000 057D 8.5 ISTD-6500 I APPLICABILITY Table ISM 6.5.2-1 Table ISTDJ4252-1 This Code Case establishes specific requirements tim must be met in order to allow extension of the visua L examination interval beyond the maximum interva allowed in Table [STD 6.5.2-i for mechanical anc 3 SPECIFIC REQUIREMENTS hydraulic snubbers. Paragraphs referenced in this Codc 3.1 Examination for Indications of Degradation or Case denote the 1995 Edition and 1996 Addenda. P Severe Operating Environments correlation Table 1 is provided for 1998 Edition.

Examinations per rSTD 6.1, ISTD 6.2, LSTD 6.3, and 1STD 6.4 shall include examination for indications of 2 GENERAL REQUIREMENTS degradation and severe operating environments.

The following requirements shall be implemented ir1 order to extend rthe visual examination interval bevonci 3.2 Examination Prior to Maintenance or Testing the maximum interval allowed in Tabie 15STD 6.5.2-1.

All snubbers shall be examined in accordance with (a) These requirements are in addition to the servici the requirements of ISTD 6.1, ISTD 6.2,'5TD 6.3, and life monitoring requirements in ISTD 8. ISTD 6.4 and para. 3.1 of this Code Case prior to conduct-(b) The requirements of this Code Case shall be imple ing any maintenance, stroking, or testing, and prior to mented after the requirements of ISTD 6.5.1., [STE removai, for any reason, from their installed location.

6.5.2(a), TSTD 6.5.2(b), and iSTD 6.5.2(c) have been satis fled and the previous examination per Table LSTD 6.5.2. 3.3 Monitoring of Reservoir Fluid Level 1 was performed at a maximum interval of two fue Fluid level in hydraulic snubber reservoirs shall be cycles.

sufficient to ensure that the snubber is acceptable for (C) Demonstrate that the requirements of oaras. 3.1 continued service t the next examination interval.

3.2, 3.3, 3.4. 3.5, and 3.6 of this Code Case have beer met for one interval prior to extending the examinatior 3.4 Review of Operational Readiness Test Data interval.

All inservice test data acquired since implementation 2.1. Service Life Evaluations of the requirements of this Code Case shall be evaluated The data and information gathered under this Codt eor indications of snubber degradation or other anoma-Case shall be utilized to reevaluate service life a: lies. This includes a review of test traces, where available.

described in ISTD 8. The results of this evaluation shall be used (a) to identify snubbers that are subject to progressive 2.2 Testing for This Code Case degradation Snubbers tested soecificailv for this Code Case shal 1 (b) to identif. severe operating environments not pre-be dispositioned per ISTD 8.5. viously identified C-42 co AsE£ SIn le--. ahj

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CODE CASE OMN-1.3 ASME OM CODE-2004 W,'ere applicabl.e, data gathered prior to implementa- 3.6 Transient Dynamic Event tion of this Code Casa shall aiso be evajuated. The service Life evaluation required by para. 2.1 of this Code Case shall include any transient dynamic event 3.5 Examination During 3,isassembly and actions taken under 15TD 1.13.

Snubbers and snubber parts shall be examined for 3.7 Frequency of Examinations indications of degradation and severe operating Unvi-All snubbers within the scoFe of LSTD shall be exam-ronrments during disassernblv (e.g.. during failure evaiu- ;ned and evaluated per ESTD 6.1, lSTD 6.3, and iSTD ation, refurbishment). 6.4 at least once every 10 years.

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ATTACHMENT 4 Snubber Interpretations - Information Only Revision 0

Interpretation: 04-10

Subject:

ASME Code-1998 through OMb Code-2000 Date Issued: December 12, 2005 File: OMI 05-04 Question (1): Reference ISTD-4240 and 4252(d). If a snubber reauires further evaluation or is classified as unacceptable during inservice examination and subsequently satisfies the operational readiness test criteria of ISTD-5210, is the snubber required to be classified as unacceptable for the purpose of deter-mining the subsequent visual examination interval in accordance with Table ISTD-4252-1?

Reply (1): No. Per ISTD-4240, test results that satisfy the operational readiness criteria of ISTD-5210 shall be used to accept the snubber., provided the test demonstrates that the unacceptable condition did not affect operational readiness. In such cases, the visual examination requirements of LSTD-4230 are considered to be satisfied.

Question (2): It appears that ISTD-5200 and 5240 are conflicting as to when operational readiness testing can be performed. May inservice operational readiness tests be performed on snubbers at any time during a fuel cycle, normal system operation, or system or plant outages?

Reply (2): No. ISTD-5240 restricts snubber testing from beginning earlier than 60 days before a scheduled refueling outage.

Question (3): It appears that ISTD is silent in relation to subsequent operational readiness testing requirements for a snubber that has failed operational readiness testing and. after corrective action, is installed at a different location than where the failure occurred. Is it a requirement of ISTD-5500 for a snubber that has failed operational readiness testing, then after corrective action and subsequently being installed in a different location, to be retested during the next operational readiness testing campaign?

Reply (3): No.

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NOC-AE-11002651, Inservice Testing Program Description: Safety-Related Seismic Restraints (Snubbers) for the Third 10-Year Interval

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NOC-AE-11002651, Inservice Testing Program Description: Safety-Related Seismic Restraints (Snubbers) for the Third 10-Year Interval

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