CNS-16-042, Snubber Program Plan for the Fourth Ten-Year Inservice Testing Interval

Snubber Program Plan for the Fourth Ten-Year Inservice Testing Interval

ML16166A414
Person / Time
Site:	Catawba
Issue date:	06/13/2016
From:	Henderson K Duke Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
AD-EG-CNS-1618, CNS-16-042
Download: ML16166A414 (96)

Text

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CNS-16-042 June 13, 2016 U.S. Nuclear Regulatory Commission (NRG)

Attention: Document Control Desk Washington, D.C. 20555-0001

Subject:

Duke Energy Carolinas, LLC (Duke Energy)

Catawba Nuclear Station, Units 1 and 2 Docket Numbers 50-413 and 50-414 Kelvin Henderson Vice President Catawba Nuclear Station Duke Energy CNOl VP I 4800 Concord Road York, SC 297 45 0: 803.701.4251 f: 803.701.3221 Snubber Program Plan for the Fourth Ten-Year lnservice Testing Interval In accordance with the American Society of Mechanical Engineers Code for Operation and Maintenance of Nuclear Power Plants (ASME OM Code), Subparagraph ISTA-3200(a),

Catawba Nuclear Station is submitting for your information a copy of Catawba Administrative Procedure AD-EG-CNS-1618, "Snubber Program Plan". The snubber program fourth ten-year interval runs from August 19, 2015 to August 19, 2025.

In accordance with 10 CFR 50.55a(b )(3)(v)(B), the program was developed to satisfy the snubber preservice and inservice testing and examination requirements of the ASME OM Code 2004 Edition with 2005 and 2006 Addenda. For reference, the ASME Section XI Code of Record for this interval is the 2007 Edition with 2008 Addenda.

There are no regulatory commitments contained in this letter or its attachment.

Very truly yours, Kelvin Henderson Vice President, Catawba Nuclear Station LJR/s Attachment www.duke-energy.com

Document Control Desk Page 2 June 13, 2016 xc (with attachment):

C. Haney Regional Administrator U.S. Nuclear Regulatory Commission - Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, GA 30303-1257 G.A. Hutto Ill Senior Resident Inspector (Catawba)

U.S. Nuclear Regulatory Commission Catawba Nuclear Station M.D. Orenak (addressee only)

NRG Project Manager (Catawba)

U.S. Nuclear Regulatory Commission One White Flint North, Mail Stop 8 G9A 11555 Rockville Pike Rockville, MD 20852-2738

ATTACHMENT CATAWBA ADMINISTRATIVE PROCEDURE AD-EG-CNS-1618 SNUBBER PROGRAM PLAN REVISION 002

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~ ENERGY Effective Dates:

NA Site 1 NA Site 6 NA Site 11 CATAWBA ADMINISTRATIVE PROCEDURE AD-EG-CNS-1618 SNUBBER PROGRAM PLAN REVISION 002 NA NA NA Site 2 Site 3 Site4 NA NA NA Site 7 Site 8 Site 9 NA NA NA Site 12 Site 13 Site 14 Information Use NA Site 5 NA Site 10 NA Site 15

SNUBBER PROGRAM PLAN REVISION

SUMMARY

PRR AR02031939 DESCRIPTION Revised procedure to correct editorial error in procedure number.

this time.

AD-EG-CNS-1618 Rev.002 Page 2 of 93 No other changes made at J

SNUBBER PROGRAM PLAN TABLE OF CONTENTS SECTION AD-EG-CNS-1618 Rev.002 Page 3 of 93 PAGE 1.0 PURPOSE..................................................................................................................... 5 2.0 GOVERNANCE AND SCOPE....................................................................................... 5 3.0 DEFINITIONS................................................................................................................ 6 4.0 RESPONSIBILITIES...................................................................................................... 7 5.0 INSTRUCTIONS.......................................................................................................... 10 5.1 General........................................................................................................................ 10 5.2 Snubber Program Plan................................................................................................ 11 5.3 IDDEAL Software Suite............................................................................................... 11 5.4 Test and Examination Scheduling............................................................................... 12 5.5 Snubber Categorization............................................................................................... 12 5.6 Visual Examination...................................................................................................... 13 5.7 Service Life Monitoring................................................................................................ 17 5.8 Operational Readiness Testing....... :........................................................................... 18 5.9 Defined Test Plan Group (DTPG)................................................................................ 20 5.10 Testing Sample Plans.......................'........................................................................... 21 5.11 Testing Sample Plan Selection.................................................................................... 21 5.12 Sample Expansion....................................................................................................... 21 5.13 Snubber Replacement................................................................................................. 22 5.14 Snubber Deletion......................................................................................................... 22 5.15 Transient Dynamic Events........................................................................................... 22 6.0 RECORDS AND REPORTS........................................................................................ 23

7.0 REFERENCES

............................................................................................................ 23

SNUBBER PROGRAM PLAN SECTION ATTACHMENTS TABLE OF CONTENTS (continued)

AD-EG-CNS-1618 Rev.002 Page 4 of 93 PAGE 1

Predefined Model Work Order Descriptions................................................................ 25 2

Typical Outage Work Process..................................................................................... 28 3

Unit 1 Failure History................................................................................................... 30 4

Unit 2 Failure History................................................................................................... 36 5

Outage Summary Template......................................................................................... 41 6

General Service Life Monitoring lnformation................................................................ 44 7

Service Life List for Mechanical Snubbers...................................................................48 8

Service Life List for Lisega Snubbers.......................................................................... 88

SNUBBER PROGRAM PLAN 1.0 PURPOSE AD-EG-CNS-1618 Rev.002 Page 5 of 93

1.

This procedure documents the methods used to develop, administer, and implement the Snubber Program at Catawba Nuclear Station (CNS) Units 1 and

2.

2.0 GOVERNANCE AND SCOPE

1.

1 OCFR50.55a stipulates the ASME Code for Operation and Maintenance of Nuclear Power Plants, 2004 edition through 2006 addenda, for the inspection and testing of snubbers. Specifically Subsections ISTA and ISTD will govern snubber examination and testing activities, including the utilization of Code Case QMN-13. This is effective for the fourth 10-year IST interval for both units 1 and 2 which has a start date of 8/19/2015 (The snubber IST Interval is intended to coincide with the Section XI ISi Interval - but is not required to do so).

2.

The program scope envelopes the scope described in the ASME Code for Operation and Maintenance of Nuclear Power Plants, 2004 edition through 2006 addenda, Subsection ISTA, Article ISTA-1100 which is defined as the following:

a.

Snubbers used in systems that perform a specific function in shutting down a reactor to the safe shutdown condition

b.

Snubbers used to maintain the safe shutdown condition

c.

Snubbers employed to mitigate the consequences of an accident

d.

Snubbers used to ensure the integrity of the reactor coolant pressure boundary

3.

This procedure also applies to snubbers addressed in Selected Licensee Commitment (SLC) 16.9-13. Snubber scope as identified in SLC 16.9-13 consists of all snubbers except those snubbers installed on non-safety related systems, which may be excluded provided their failure or the failure of the system on which they are installed would not have an adverse effect on any safety related system. Based upon the design criteria referenced in Design Specification CNS-1206.00-4-0001, all snubbers falling within the SLC scope are enveloped by either the QA Condition 1 or QA Condition 4 classification. The SLC scope conservatively includes all QA 1 and 4 snubbers, even though some Seismic Category II snubbers classified as QA Condition 4 potentially may be excluded due to not adversely affecting a safety related system. Any such exclusions from SLC activities will be documented on a case by case basis.

4.

In keeping with good engineering practice and to provide reasonable assurance of structural reliability, any remaining snubb,ers not identified above (typically Non-Safety related) may be included in the program and, at a minimum, inspected or monitored periodically.

SNUBBER PROGRAM PLAN 3.0 DEFINITIONS AD-EG-CNS-1618 Rev.002 Page 6 of 93

1.

Acceptable: A snubber that has been examined or tested, and is shown to meet examination or testing acceptance criteria.

2.

Accessible: Snubbers that can be readily examined or tested during normal plant operations without exposing plant personnel to undue hazards or dose, or placing operating equipment at risk.

3.

Defined Test Plan Group (DTPG): A population of snubbers selected for testing in accordance with the snubber testing sample plan.

4.

Degraded: Any snubber that has an examination or testing parameter that is approaching, but has not exceeded the limits of the acceptance criteria.

5.

Failure Mode Group (FMG): A group of snubbers that have failed and those other snubbers that have similar potential for similar failure.

6.

Inaccessible: Snubbers that are located in environments which make it impractical for the snubbers to be examined under normal plant operations without exposing plant personnel to undue hazards (e.g., radiation or extreme heat) or putting plant equipment at risk.

7.

Safety-Significant Snubbers: Snubbers designated as non-safety but determined that their failure or the failure of the system on which they are installed would have an adverse effect on any safety-related system.

8.

Service Life: The period of time a snubber is expected to meet the operational readiness requirements without maintenance.

9.

Transient Dynamic Event: An unexpected or potentially damaging occurrence, which was determined from reviews of operating data or during a visual inspection/examination such as a water/steam hammer, earthquake or similar event.

10.

Unacceptable: Snubbers that do not meet examination or testing acceptance criteria.

SNUBBER PROGRAM PLAN 4.0 RESPONSIBILITIES NOTE AD-EG-CNS-1618 Rev.002 Page 7 of 93 The general roles and responsibilities for the execution of NGO Engineering Programs are outlined in AD-EG-ALL-1600, Engineering Programs and PD-EG-ALL-1618, Snubber Program.

Specific activities and responsibilities for those organizations and individuals that are involved with the implementation of the Snubber Program at the CNS plant site are outlined below.

4.1 Plant Engineering Supervisor

1.

Ensures that the Snubber Programs are effectively managed and implemented to meet regulatory, process, and procedure requirements.

4.2 Fleet Snubber Program Manager

1.

Provides governance and oversight.

2.

Provides strategic and technical direction to the Site Snubber Program Managers.

3.

Develops Fleet Snubber Health Report

4.

Reviews site Snubber Health reports.

4.3 Snubber Program Manager

1.

Maintains qualifications in accordance with CNS training program requirements.

2.

Establishes, prepares, and maintains snubber testing and examination Program Plans, implementing procedures, and schedules.

3.

Assigns examination and testing requirements for snubbers, as identified in the Snubber Program Plan.

4.

Maintains the IDDEAL Software Suite Database (SnubbWorks) for snubbers.

5.

Coordinates the performance of scheduled and non-scheduled snubber examination and testing activities as well as preventive maintenance and condition monitoring activities.

6.

Selects and identifies snubbers for examination, testing and service life activities.

7.

Reviews test and examination results for acceptability.

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 8 of 93

8.

Evaluates results of examinations and tests found not meeting the acceptance criteria.

9.

Generates corrective actions:

10.

Action Requests (ARs)

11.

Condition Reports (CRs) or Problem Investigation Program Reports (PIPs)

12.

Work Requests (WRs) in support of Program activities

13.

Determines the extent of additional examinations, tests, or repairs which may be required following the discovery of an unacceptable snubber condition.

14.

Establishes, monitors and tracks the service life of installed snubbers through the Service Life Monitoring Program.

15.

Prepares the scope lists for snubber functional testing and visual examination activities.

16.

Provides pertinent information to the implementing work groups.

17.

Selects the snubber populations to be examined and tested.

18.

Identifies the applicable procedures required to satisfy the examination or testing requirements, per the Snubber Program Plan.

19.

Su.bmits the required snubber work scope to the On-Line work management, Outage work management, and Planning work groups.

20.

Manages the scope, including content, additions, deletions, expansions and corrections of the snubber work scope.

21.

Compares current recorded results with the prior or expected results to determine snubber continued service and/or corrective actions.

22.

Identifies Licensing or Code requirements which cannot be achieved due to impracticality or hardship and initiates actions (Relief Request) necessary to notify the Nuclear Regulatory Commission (NRC).

23.

Establishes industry contacts with ASME OM Code committee representatives, peers at other nuclear utilities, and outside consultants to ensure that the Snubber Program effectively utilizes external operating experience.

24.

Reviews plant design changes and revises the Snubber Program Plan, accordingly.

25.

Performs Operability/Functionality Evaluations for snubbers as required.

SNUBBER PROGRAM PLAN 4.4 Plant Maintenance AD-EG-CNS-1618 Rev.002 Page 9 of 93

1.

Ensures that snubber functional testing is performed in accordance with the applicable station procedures.

2.

Records the results of the snubber tests, examinations, and as-found or as-left conditions of the snubber in accordance with the appropriate station procedures.

3.

Reports findings on the appropriate data sheet(s); notifying the Snubber Program Manager.

4.

Repairs, rebuilds, or replaces snubbers as required under the Snubber Program.

4.5 Plant Design Engineering

1.

Performs Operability/Functionality Evaluations on piping systems or components.

2.

Notifies the Snubber Program Manager of plant design changes that may impact the Snubber Program.

4.6 Plant Regulatory Affairs

1.

Provides licensing support of the Snubber Program.

2.

Processes relief requests.

3.

Submits Snubber Program Plan documents to Regulatory Authorities.

SNUBBER PROGRAM PLAN 5.0 INSTRUCTIONS 5.1 General AD-EG-CNS-1618 Rev.002 Page 10 of 93

1.

For the purposes of this procedure, references to Snubber Program Manager means a (qualified) designee or other person assigned to complete any procedural requirement identified in this procedure. Snubber Program Managers shall be qualified in accordance with the applicable CNS Program Engineering requirements [ref. ISTA-1500(e)].

2.

ASME OM requirements are identified and administered by the implementation of this document.

3.

This document (the Snubber Program Plan) contains the overall details and implementation requirements for snubber examination, testing, and service life monitoring of snubbers. The Plan details the appropriate snubber categorization, the examination and test plan(s) required to be performed each refueling cycle, and service life monitoring of all plant installed snubbers.

4.

During the ten-year interval between required program updates, the Snubber Program Plan may periodically be subject to revision. Reasons for revision include, but are not limited to:

a.

Incorporation of Relief Requests

b.

Incorporation of Code Cases

c.

NRC Regulatory Guides, Notices and Bulletins

d.

Augmented examinations

e.

Organizational/Responsibility changes

f.

Plant License changes

g.

Snubber replacements

h.

Snubber Service Life Monitoring updates

i.

Modifications to the plant that impact the Snubber Program

5.

Generation and revision to the Snubber Program Plan shall be made in accordance with applicable corporate and site processes..

SNUBBER PROGRAM PLAN 5.2 Snubber Program Plan AD-EG-CNS-1618 Rev.002 Page 11 of 93

1.

Each NGO site is responsible for generation and maintenance of the site Snubber Program Plan, herein referred to as the Program.

2.

The Snubber Program Plan is in accordance with AD-DC-ALL-0201, Development and Maintenance of Controlled Procedure Manual Procedures.

3.

On an annual basis, and generally within 6 months of completion of a refueling outage, the Snubber Program Plan shall be revised as applicable to update pertinent information. All updates shall be documented in the Snubber Program Plan's Revision History.

4.

10-year Updates:

a.

Once every 10 years, the Snubber Program requires updating to the edition and addenda specified in 10 CFR 50.55a.

b.

The snubber program intervals are intended to be concurrent with the Catawba ASME Section XI 10-year intervals. The fourth Section XI interval for both units has an intended start date of 8/19/2015 at the issue date of this document, and that date is used for the snubber IST interval start date.

c.

Snubber Program Plans for each 10-year interval shall be filed with the regulatory authorities in accordance with ASME OM requirements.

Submittal shall consist of the latest revision to this document (AD-EG-CNS-1618) with cover sheet information as required by ASME OM ISTA-3200. Other pertinent articles of ASME OM include ISTA-1300, 3110.

9220, and 9230.

5.

Changes to the program testing or inspection methodologies may require the Snubber Program Plan to be re-submitted to the regulatory authorities.

5.3 IDDEAL Software Suite.

1.

IDDEAL Software Suite is a non-QA software program that is governed in accordance withCNS Level C per NSD 800, Software and Data Quality Assurance (SDQA) Program. IDDEAL Software is used to:

a.

Store (as a back-up) component information, examination and testing history, and examination and testing schedules

2.

Administer and implement the lnservice Inspection (ISi), lnservice Testing (IST),

Snubber, and Balance of Plant (BOP) Programs

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 12 of 93

3.

Snubbworks (one of the ID DEAL applications) is a Microsoft Access based computer program used as a tool to manage the Snubber Program information.

This software program is used to organize pertinent data and records to assist with snubber examination, testing, and service life monitoring purposes.

a.

The information contained in Snubbworks is not QA, but can be used to produce documents or lists which, when verified, can be used as QA records.

b.

Examination and Test reports may be generated by the SnubbWorks software to document examination and test results.

5.4 Test and Examination Scheduling

1.

Test and examination scheduling routinely coincides with refueling outages.

Performing testing and examinations during refueling outages allows for improved accessibility, environmental conditions conducive for examination methods, reduced exposure (ALARA), and enhanced scheduling.

2.

Examinations may be performed during plant operation (on-line) or during refueling outages, as conditions allow.

3.

Functional testing for Test Plan credit at CNS is required to be performed during shutdown per SLC 16.9-13.

4.

Snubber examination and testing activities at CNS are scheduled via predefined model work orders against the Equipment ID MSE HG SNUBBERS. PMID 02033094 addresses Unit 1 scope and PMID 02033095 addresses Unit 2. provides information regarding definitions and scheduling of PMID work items.

5.5 Snubber Categorization

1.

For Examination purposes snubbers at CNS are categorized individually as accessible or inaccessible. The categories of accessible and inaccessible snubbers are generally considered separately for examination. Alternatively, all of the snubbers may be combined together and considered as one population for examination.

a.

A decision to examine the snubbers as one population in lieu of separate categories shall be clearly documented.

b.

This determination may be made during or after the examination.

c.

When recombining categories into one population, the shorter interval of the categories shall be used.

d.

Categorization is in accordance with ASME OM ISTD-4220.

SNUBBER PROGRAM PLAN 5.6 Visual Examination AD-EG-CNS-1618 Rev.002 Page 13 of 93

1.

Code Case OMN-13 shall be utilized to conduct Visual Examinations of snubbers for each unit. The Code Case allows for examinations to be conducted on an interval beyond the maximum allowed in Table ISTD-4252-1 but not to exceed 10 years for any snubber. Revision 0 of the Code Case is currently approved for use by Revision 1 of Regulatory Guide 1.192. Revisions 1 and 2 of OMN-13 are not currently approved by the Regulatory Guide, but are expected to be approved in the next RG revision. The differences between the Code Case revisions are largely editorial (cross-references between various OM code edition numbering formats), but there is one significant change where a "feedback" loop was added that reduces the 10 year interval in the event of significant unacceptable examinations occur. Although Revision 0 of the Code Case is the approved version, CNS will incorporate the feedback loop methodology as a conservative program enhancement. For the purpose of clarity the OM paragraph numbering format from OMN-13 Revision 1 is used herein to match the actual OM edition being used.

2.

If at any time during an examination interval the cumulative number of unacceptable snubbers exceeds the applicable value from Column B in Table ISTD-4252-1, the current examination interval shall end, and all remaining examinations must be completed within the current fuel cycle. The duration of the subsequent examination interval shall be reduced in accordance with Table ISTD-4252-1, using the examination interval prior to implementing the Code Case as the base interval. The beginning of the subsequent fuel cycle shall be the starting date for the new examination interval.

3.

As described in OMN-13 the prerequisites for utilizing the Code Case are:

a.

Requirements of ISTD-4251 and ISTD-4252 have been satisfied with the preceding examination interval performed at the maximum interval of two fuel cycles per Table ISTD-4252-1.

b.

Requirements of Code Case OMN-13 paragraphs 3.1 through 3.6 shall have been satisfied for one interval prior to extending the examination interval in accordance with the Code Case.

SNUBBER PROGRAM PLAN

4.

Verification of satisfying OMN-13 Prerequisites:

AD-EG-CNS-1618 Rev.002 Page 14 of 93

a.

During the Third ISi Interval snubbers were visually examined on the required schedule noted in SLC-16.9-13 (current at that time) and evaluated to determine their operational readiness. The SLC Visual Examination Interval table in place' during the Third ISi Interval was identical to Table ISTD-4252-1. In accordance with the SLC table, the frequency of examination was determined by the total number of snubbers in the examination category and the number of unacceptable examinations recorded during the previous examination period. The maximum interval of two cycles was successfully utilized for the intervals which encompassed cycles 20/21 for Unit 1 and 18/19 for Unit 2. For Unit 1 zero snubbers were identified during the interval as being Unacceptable in accordance with the Visual Examination Acceptance Criteria. For Unit 2 only one snubber was identified as Unacceptable during the interval, which is within the Table Column B allowable limit of 5 unacceptable snubbers for a population of greater than 200 snubbers (The smallest population is Unit 2 Inaccessible snubbers which numbers greater than 250 snubbers). Therefore it is acceptable to extend the interval in accordance with OMN-13 for this prerequisite. [ASME OM ISTD-4252]

(NOTE: Zero visual failures have been recorded on Unit 1 and only 1 on Unit 2 in the last 12 fuel cycles for each unit - with examinations performed every other cycle.)

b.

OMN-13 paragraph 3.1 through 3.6 requirements:

(1)

OMN-13 paragraph 3.1 states: "Examinations per paras. ISTD-4210, ISTD-4220, ISTD-4230, and ISTD-4240 shall include examination for indications of degradation and severe operating environments." All snubber examinations were/are performed using procedures MP/O/A/7650/059, MP/O/A/7650/085, or MP/O/A/7650/095 which include such indications in the examination checklist.

(2)

OMN-13 paragraph 3.2 states: "All snubbers shall be examined in accordance with the requirements of paras. ISTD-4210, ISTD-4220, ISTD-4230, and ISTD-4240 and para. 3.1 of this Code Case prior to conducting any maintenance, stroking, or testing, and prior to removal, for any reason, from their installed location." All snubber removal or stroking is performed using either procedure MP/O/A/7650/059 or MP/O/A/7650/095. Both procedures require the prerequisite examinations as described in the referenced paragraphs.

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 15 of 93 (3)

OMN-13 paragraph 3.3 states: "Fluid level in hydraulic snubber reservoirs shall be sufficient to ensure that the snubber is acceptable for continued service to the next examination interval."

Procedures MP/O/A/7650/059, MP/O/A/7650/085, and MP/O/A/7650/095 include requirements for verifying snubber fluid levels within acceptable limits.

(4)

OMN-13 paragraph 3.4 requires that inservice test data be evaluated for pertinent indications and anomalies indicative of progressive degradation. This evaluation is included within the Service Life Monitoring activities as described in Section 5. 7 and of this document (AD-EG-CNS-1618).

(5)

OMN-13 paragraph 3.5 states:" Snubbers and snubber parts shall be examined for indications of degradation and severe operating environments during disassembly (e.g., during failure evaluation, refurbishment)." This evaluation is included within the Service Life Monitoring activities as described in Section 5. 7 and Attachment 3 of this document (AD-EG-CNS-1618), as well as included in corrective actions required in accordance with Section 5.8.

(6)

OMN-13 paragraph 3.6 states:" The service life evaluation required by para. 2.1 of this Code Case shall include any transient dynamic event and actions taken under ISTD-1750." As described in Section 5.7, 5.15, and Attachment 3 of this document (AD-EG-CNS-1618) all failures are accounted for within the scope of Service Life Monitoring activities.

5.

The start date for the 10 year OMN-13 Code Case interval is conservatively set as the start date for the last series of examinations completed prior to the start of the Fourth ISi Interval. These dates are January 6, 2014 for Unit 1 (Ref. PMID#

02033094 - 7,8,9, 10) and January 7, 2013 for Unit 2 (Ref. PMID# 02002033095 -

7,8,9, 10). Unless the period is truncated in accordance with OMN-13, 3.7(b) all snubbers shall be examined at least once within 10 years of these dates.

Should such truncation be required this document (AD-EG-CNS-1618) shall be revised to document the required inspection interval.

6.

Visual Examinations are conducted using Procedure MP/O/A/7650/085 in circumstances where only an examination is required and no other work is performed.

7.

Snubber removal and restoration for any reason is performed in accordance with Procedure MP/O/A/7650/059. The procedure includes requirements and criteria for Visual Examinations prior to and following hands-on work.

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 16 of 93

8.

Snubber stroking (Freedom of Motion) is performed in accordance with Procedure MP/O/A/7650/095. The procedure includes requirements and criteria for Visual Examinations prior to and following hands-on work. As noted in Section 5.7 and Attachment 1 of this document (AD-EG-CNS-1618) the entire snubber population is stroked in three rotating groups, which results in the entire population being stroked at least once every five years. Since the procedure includes a Visual Examination prior to performing the stroke this activity can be used to credit towards the required Visual Examinations (which are required every ten years per OMN-13).

9.

All snubbers identified during the period that do not meet the visual examination acceptance criteria shall be considered as "Unacceptable" when determining the length of the following period in accordance with Table ISTD-4242-1. This includes snubbers identified outside of the scheduled examination process.

10.

Any unacceptable snubber identified shall have an evaluation performed by the Snubber Program Manager or a designated individual knowledgeable in snubber operability requirements. [ASME OM ISTD-4270 & 4280]

a.

This evaluation shall be performed to determine the type and cause of the visual examination discrepancy and effect on the operability of the snubber and related component(s).

b.

If the condition is determined to be generic, then additional examinations may be required, or if an isolated case, a Work Request may be issued to correct any discrepancies found.

c.

For any snubber determined to be unacceptable or unsatisfactory, the Snubber Program Manager or designee shall initiate a CR.

11.

Snubbers with unacceptable visual examination results may be evaluated by performing operational readiness testing (functional testing) in the as-found condition. Snubbers satisfying the operational readiness testing acceptance criteria may be reclassified as acceptable visual examinations. [ASME OM ISTD-4240]

12.

The Visual As-Found examination shall be performed before the snubber is disconnected or removed for any reason. This examination is to determine that there are no visible indications of damage or impaired functional ability due to physical damage, leakage, corrosion, or degradation from environmental exposure or operating conditions.

13.

An augmented scope is invoked whenever a visual examination is to be performed as a supplemental scope outside of the program requirements.

SNUBBER PROGRAM PLAN 5.7 Service Life Monitoring AD-EG-CNS-1618 Rev.002 Page 17 of 93 The snubber program includes a Service Life Monitoring component that addresses the following (See Attachment 5 for further explanation) [ASME OM ISTD-6000]:

1.

Each installed snubber within the program scope has an estimated service life established and documented in Snubbworks.

2.

A report providing the estimated service life value of each snubber is available in the Snubbworks software.

3.

Snubber service life values shall be reviewed by the Program Manager each cycle and those snubbers that will reach end of life during the upcoming cycle are to be identified for replacement or refurbishment.

4.

Previously established Service Life values for every installed snubber shall be evaluated each fuel cycle for continued applicability. Based upon the evaluation the estimated service life values may remain as previously established, reduced, or increased. The snubber listing shall be updated to reflect the evaluation results. The evaluation methodology and basis for conclusions are to be clearly documented in an outage summary CR.

a. For hydraulic snubbers the estimated seal life is generally the governing factor for overall service life. Seal life is based upon OEM recommendations, actual experience, or seal life studies. Currently a 25 year seal life is generically assumed for Lisega pipe snubbers, with certain exceptions as noted in the listing due to actual experience under severe conditions.

b. For SG snubbers a seal life of 41.6 years was established based upon a study performed on identical components at McGuire Nuclear Station (Ref. CNC-1232.00-00-0151 ).

c. For mechanical snubbers a generic service life of 40 years from the date of manufacture was initially assumed as a baseline value per initial OEM recommendations. To date this generic assumption has been validated based largely upon the condition monitoring trending performed using stroke testing per Procedure MP/O/A/7650/095.

Data is insufficient to accurately predict an exact end of life, however the entire population is hand stroked over a 3-cycle period and the results evaluated to validate suitability for the next 3-cycle period.

Based upon this program a generic administrative value of 60 years is used in the lddeal database for PSA mechanical snubbers, although actual acceptability is confirmed through the rolling 3 cycle evaluation. Certain snubbers in severe (high vibration) applications have previously been replaced with hydraulic snubbers, and this will continue to be the practice as applicable.

d. Historical data should be reviewed to identify any trends regarding service life values. Attachments 3 and 4 contain listings of past failed and significantly degraded snubbers for Units 1 and 2 respectively.

5.

If the evaluation indicates that the service life of any snubber or snubbers will be exceeded before the next scheduled system or plant outage, one of the following actions shall be taken:

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 18 of 93

a. The snubber(s) shall be replaced with a snubber for which the service life will not be exceeded before the next scheduled system or plant outage.

b. Technical justification shall be documented for extending the service life to or beyond the next scheduled system or plant outage.

c. The snubber(s) shall be reconditioned such that its service life will be extended to or beyond the next scheduled system or plant outage.

6.

Prior to the beginning of each fuel cycle (startup following refueling), it shall be documented that all installed snubbers have a service life that will not be exceeded prior to either the next refuel outage or next scheduled maintenance activity for that snubber. This is documented by a signed step in Procedure PT/O/A/4200/084 (Engineering Check List for Mode Change), as well as in an outage summary Corrective Action Program document (CR). See Attachment 4 for an Outage Summary Template.

5.8 Operational Readiness Testing

1.

Snubber populations within the program scope shall be tested for operational readiness during each fuel cycle. Testing will be performed in accordance with the specified sampling plan as designated in Sections 5.9 and 5.10. [ASME OM ISTD-5260]

2.

Testing is required to be performed during shutdown, based upon the plant licensing requirements in SLC 16.9-13.

3.

Non-Safety Related Snubbers may be tested at the discretion of the Program Manager.

4.

Snubbers shall be tested in their as-found condition regarding the parameters to be tested to the fullest extent practicable.

5.

Test methods shall not alter the condition of a snubber to the extent that the results do not represent the as-found snubber condition.

6.

Pipe snubbers are to be removed from the field installation and bench tested in accordance with Procedure MP/O/A/7650/131.

7.

Snubbers shall not be subjected to prior preventive or corrective maintenance (pre-conditioning) specifically for the purpose of meeting the applicable examination or testing requirements. Verification of freedom of motion upon snubber removal is not considered to be pre-conditioning.

8.

Large Bore Steam Generator snubbers are tested by removal of control valves which are then bench tested in a surrogate snubber using Procedure SM/O/A/8100/003. Corre!ation of surrogate test data to actual service criteria is performed in accordance with site specifications and Original Equipment Manufacturer (OEM) recommendations.

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 19 of 93

9.

Operational Readiness Test acceptance criteria is defined in Appendix H of CNS-1206.00-04-0003.

10.

Snubbers that are maintained or repaired by removing or adjusting a snubber part that can affect the results of the applicable tests required by this program, shall be examined and tested in accordance with the applicable requirements before returning to service. Additionally, the applicable installation requirements shall be met. The requirements selected shall ensure that the parameters that may have been affected are verified to be acceptable by suitable examination and tests.

11.

The applicable site maintenance procedures shall govern the removal and reinstallation of plant installed snubbers. Procedure MP/O/A/7650/059 is the governing procedure for all support/restraint removal/restoration activities.

12.

Each snubber shall have an As-Found Visual Examination performed prior to removal activities and an As-Left Visual Examination following reinstallation in accordance with Procedure MP/O/A/7650/059.

13.

Non-Safety snubber visual examination requirements shall be as directed by site Program Manager if the procedure is not utilized.

14.

For each snubber determined to be unacceptable by operational readiness testing, additional snubbers shall be tested as described by ASME OM ISTD-5270. The number of additional snubbers tested is dependent upon the sample plan being utilized.

15.

An evaluation of unacceptable (failed) snubbers is required and will be documented in accordance with the Corrective Action Program (CR).

16.

An Engineering Evaluation shall be performed on the System, Structure, or Component (SSC) to which the unacceptable snubbers were attached.

a.

The purpose of this Engineering Evaluation will be to determine if the SSC to which the inoperable snubbers are attached were adversely affected by the inoperability of the snubbers in order to ensure that the SSC remains capable of meeting the designed service.

17.

For each Non-Safety Related snubber determined to be unacceptable by operational readiness testing, additional tests may be required as determined by the Program Manager. This will be performed as warranted to address extent of condition and service life concerns in accordance with the Corrective Action Program.

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 20 of 93

18.

Degraded snubbers. are typically replaced with new snubbers as a preventive maintenance action. Scope expansion is not required for degraded snubbers unless determined to be required for extent of condition concerns. Additional snubbers may be tested or replaced at the discretion of the Program Manager based on the cause of the degradation and the potential impact on service life assumptions. Information learned from the degraded snubbers shall be considered in the service life monitoring program as applicable.

19.

Test equipment failure during functional testing may invalidate that day's testing.

Failed testing equipment will be repaired or replaced. If it can be determined exactly when the failure happened, only the affected snubbers shall be retested.

20.

The initial test performed for an in-service snubber test shall be maintained as the As-found test of record. If multiple tests are performed for any reason, all test results are to be saved and documented. Copies of all tests are to be included with the test procedure records along with notations as to the reason for multiple tests. The Program Manager may provide additional comments or justification as an attachment to the procedure as required.

21.

Test results will be reviewed for adverse trends which will help establish the service life of specific snubbers or locations.

22.

Each snubber in a parallel or multiple-snubber installation shall be identified and counted individually. Fractional sample sizes shall be rounded up to the next integer.

5.9 Defined Test Plan Group (DTPG)

1.

The DTPGs shall include all Safety Related (QA Condition 1 or 4) snubbers except replacement snubbers and snubbers repaired or adjusted as a result of not meeting the acceptance requirements. These snubbers shall be exempt for the concurrent test period.

2.

In accordance with ASME OM ISTD-5252 the total Safety Related snubber population is divided into DTPGs based upon type. All PSA (Pacific Scientific) mechanical snubbers make up one DTPG, Anchor Darling mechanical snubbers are a second DTPG, and all small bore Lisega pipe snubbers are a third DTPG.

3.

The large bore steam generator snubbers shall be tested as a separate DTPG..

SNUBBER PROGRAM PLAN 5.10 Testing Sample Plans AD-EG-CNS-1618 Rev.002 Page 21 of 93

1.

Safety Related snubbers of each DTPG shall be tested using the following sample plans as described in ASME OM ISTD:

a.

The 10% testing sample plan is utilized for Anchor Darling, Lisega, and Steam Generator DTPGs. [ASME OM ISTD-5300]

b.

The 37 testing sample plan is used for PSA snubbers. [ASME OM ISTD-5400]

NOTE If the test plan selection is changed since the Plan submittal to the Regulatory Authorities, then it may be necessary that the revised Snubber Program Plan be re-submitted..

2.

A test plan shall be selected for each DTPG before the scheduled testing begins.

3.

The test plan selected for a DTPG shall be used throughout the refueling outage campaign for that DTPG and any Failure Mode Group (FMG) that is derived from it.

4.

For unacceptable snubber(s), the additional testing shall continue in the DTPG or FMG.

5.11 Testing Sample Plan Selection

1.

The initial sample selection shall be random as described in ASME OM ISTD-5311 & 5411:

2.

Selection of the representative 10% Plan samples may also be selected from snubbers concurrently scheduled for seal replacement or other similar activity related to service life monitoring. The snubbers shall be tested on a generally rotational basis to coincide with the service life monitoring activity.

5.12 Sample Expansion

1.

After determination that a snubber is unacceptable, an additional test plan sample shall be established. Additional test sample size shall be as required per ASME OM ISTD-5312 & 5412.

a.

37 Plan supplemental samples shall consist of either 18 or 19 snubbers based upon the number of unacceptable snubbers and calculated using the numerical expression in the SLC. [ASME OM ISTD-5431]

b.

10% Plan supplemental samples shall consist of an additional 10% of the DTPG population. [ASME OM ISTD-5331]

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 22 of 93

2.

In addition to the required test plan sample expansion a Failure Mode Group (FMG) test population may be established. The unacceptable snubber(s) may be categorized into a FMG containing all unacceptable snubbers that have a given failure cause and all other snubbers evaluated to be vulnerable to the same cause. [ASME OM ISTD-5272 & 5273]

5.13 Snubber Replacement

1.

Any replacement or modified snubber(s) shall have a proven suitability for the application and environment. Documentation of the suitability evaluation shall be made in the Work Order documentation and appropriate procedure sign-offs per Procedure MP/O/A/7650/059.

2.

Replacement or modified snubbers shall be examined and tested before placing into service. Test results from the manufacturer for new snubbers may be utilized. Testing may be waived as documented in the appropriate installation procedure MP/O/A/7650/059.

5.14 Snubber Deletion

1.

Snubbers may be deleted from the plant based on analysis of the affected piping system. When an unacceptable snubber is subsequently deleted prior to the completion of the test campaign, the deleted snubber shall nevertheless be considered in its respective examination population, examination category, or failure mode group (FMG) for determining the corrective action.

2.

The number of deleted snubbers that failed or passed tests or examinations prior to being deleted will be used in determining examination or testing frequencies.

5.15 Transient Dynamic Events

1.

If an unanticipated dynamic event (e.g., water hammer, steam hammer, beyond Design Basis Event (DBE), etc.) occurs that may affect snubber operability, then the affected snubbers and systems shall be reviewed and any appropriate corrective action taken. The event information, scope of review, and actions taken shall be documented in the Corrective Action Program (CR).

a.

The Program Manager shall contact the System Engineer and/or Design Engineering to define the extent of evaluation for the affected system.

b.

Snubbers within the affected region shall be examined, stroked, or tested as deemed appropriate to address the concern.

c.

In many cases, the condition monitoring stroke testing that has already been planned or completed may sufficiently address the concern.

SNUBBER PROGRAM PLAN 6.0 RECORDS AND REPORTS AD-EG-CNS-1618 Rev.002 Page 23 of 93

1.

Records of inspections, tests, repairs, and evaluations are maintained in the Work Order documentation. Work Orders can be searched by equipment number as well as by the PMID histories for the appropriate unit.

2.

Activity summaries and records of evaluations are also documented in the Corrective Action Program (See Attachment 3 for Outage Summary Template).

7.0 REFERENCES NOTE The snubber program references for each applicable Plant/Unit are maintained in the site specific Snubber Program Plans.

7.1 Commitments

1.

Code of Federal Regulations: 10 CFR 50.55a, Codes and Standards

2.

CNS UFSAR Section 3.9.3

3.

CNS Technical Specification Sections 3.0.8

4.

CNS Selected Licensee Committment SLC 16.9-13 7.2 Procedures

1.

AD-DC-ALL-0201, Development and Maintenance of Controlled Procedure Manual Procedures

2.

AD-EG-ALL-1000, Conduct of Engineering

3.

AD-EG-ALL-1006, Conduct of Technical Program Engineering

4.

AD-EG-ALL-1600, Engineering Programs

5.

AD-EG-ALL-1618, Snubber Program Plan

6.

PD-EG-ALL-1618, Snubber Program Description

7.

ADM-NGGC-0115, Preconditioning of Structures, Systems & Components

8.

ADM-NGGC-0203, Preventive Maintenance and Surveillance Testing Administration

9.

CSP-NGGC-2505, Software Quality Assurance and Configuration Control of Business Computer Systems Vendor/Technical Manuals

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 24 of 93

10.

NSD 800, Software and Data Quality Assurance (SDQA) Program

11.

MP/O/A/7650/059, Controlling Procedure for S/R Maintenance Activities

12.

MP/O/A/7650/085, Visual Examination of Snubbers

13.

MP/O/A/76750/095, Post Transient Inspection (Stroke Procedure)

14.

MP/O/A/7650/131, Operation of Snubber Test Machine

15.

SM/O/A/8100/003, SG Snubber Examination and Testing 7.3 Miscellaneous Documents

1.

ASME OM: Operation and Maintenance of Nuclear Power Plants

2.

ASME Section XI Code, Rules for lnservice Inspection of Nuclear Power Plant Components

3.

Regulatory Guide 1.192, Operation and Maintenance Code Case Applicability, ASME OM Code

4.

Regulatory Guide 1.193, ASME Code Cases Not Approved for Use

5.

INPO EPG-07, Snubbers

6.

NUREG-1482, Guidelines for lnservice Testing at Nuclear Power Plants

7.

CNS-1206.00-04-0001, Design Specification for Nuclear Safety Related (QA Condition 1) and QA Condition 4 Component Supports CNS-1206.00-04-0003, Procedure Requirements for Fabrication and Erection of Hangers, Supports, and Seismic Control

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 25 of 93 Unit 1 lnnage Work Scope:

<< Predefined Model Work Order Descriptions >>

ATTACHMENT 1 Page 1 of 3 PMID 02033094-07, Visual Non-Train (Visual examination of all non-train accessible snubbers)

PMID 02033094-08, Visual A Train (Visual examination of all accessible snubbers on Train A)

PMID 02033094-09, Visual B Train (Visual examination of all accessible snubbers on Train B)

Outage Related Work Scope:

PMID 02033094-10, Visual Inaccessible (Visual examination of all inaccessible snubbers)

PMID 02033094-11, Removal and Restoration of pipe snubbers from Aux. building for testing PMID 02033094-12, Removal and Restoration of pipe snubbers from containment for testing PMID 02033094-13, Perform Functional Testing (Testing of all pipe snubbers on test bench)

PMID 02033094-14, Inspection of SG snubbers; Removal and Testing of control valves PMID 02033094-15, Post-Outage FOM strokes of accessible ND system Train A snubbers PMID 02033094-16, Post-Outage FOM strokes of accessible ND system Train B snubbers The above models are performed every cycle, with the exception of the Visual Examinations (Tasks 07, 08, 09, 10). The frequency of the visuals is dependent upon previous examination results.

Unit 2 lnnage Work Scope:

PMID 02002033095-07, Visual Non-Train (Visual examination of all non-train accessible snubbers)

PMID 02033095-08, Visual A Train (Visual examination of all accessible snubbers on Train A)

PMID 02033095-09, Visual B Train (Visual examination of all accessible snubbers on Train B)

Outage Related Work Scope:

PMID 02033095-10, Visual Inaccessible (Visual examination of all inaccessible snubbers)

PMID 02033095-11, Removal and Restoration of pipe snubbers from Aux. building for testing PMID 02033095-12, Removal and Restoration of pipe snubbers from containment for testing PMID 02033095-13, Perform Functional Testing (Testing of all pipe snubbers on test bench)

PMID 02033095-14, Inspection of SG snubbers; Removal and Testing of control valves PMID 02033095-15, Post-Outage FOM strokes of accessible ND system Train A snubbers PMID 02033095-16, Post-Outage FOM strokes of accessible ND system Train B snubbers The above models are performed every cycle, with the exception of the Visual Examinations (Tasks 07, 08, 09, 10). The frequency of the visuals is dependent upon previous examination results. It is noted that the Predefined Work Orders do not identify the scope of work as related to particular snubbers and supports. Unique work orders generated from the models must have the actual scope identified by the Responsible Engineer based upon random sample plans and past history. The frequency of the Visual Inspection predefined work orders will also be updated by the Responsible Engineer as needed at each usage based the results of each inspection.

SNUBBER PROGRAM PLAN

<< Predefined Model Work Order Descriptions >>

AD-EG-CNS-1618 Rev.002 Page 26 of 93 ATTACHMENT 1 Page 2 of 3 The following model work orders address stroke testing of all snubbers not included in the above mentioned FOM models. The following models divide the remaining population into three groupings to be performed on a rotating 3-cycle basis.

Cycle A PMID Unit 1 Unit 2 02033094-17 02033095-40 Outage A FOM Non Train 02033094-18 02033095-29 Outage A FOM Train A 02033094-19 02033095-30 Outage A FOM Train B 02033094-20 02033095-31 Outage A FOM Train NB 02033094-21 02033095-17 lnnage A FOM Train A 02033094-22 02033095-18 lnnage A FOM Train B 02033094-23 02033095-19 lnnage A FOM Train NB 02033094-24. 02033095-20 lnnage A FOM Non Train Cycle B PMID Unit 1 Unit 2 02033094-25 02033095-32 Outage B FOM Train A 02033094-26 02033095-33 Outage B FOM Train B 02033094-27 02033095-39 Outage B FOM Train NB 02033094-28 02033095-34 Outage B FOM NonTrain 02033094-29 02033095-21 lnnage B FOM Train A 02033094-30 02033095-22 lnnage B FOM Train B 02033094-31 02033095-23 lnnage B FOM Train NB 02033094-32 02033095-24 lnnage B FOM Non Train Cycle C PMID Unit 1 Unit 2 02033094-33 02033095-35 Outage C FOM Train A 02033094-34 02033095-36 Outage C FOM Train B 02033094-35 02033095-37 Outage C FOM Train NB 02033094-36 02033095-38 Outage C FOM NonTrain 02033094-37 02033095-25 lnnage C FOM Train A 02033094-38 02033095-26 lnnage C FOM Train B 02033094-39 02033095-27 lnnage C FOM Train NB 02033094-40 02033095-28 lnnage C FOM Non Train

SNUBBER PROGRAM PLAN

<< Predefined Model Work Order Descriptions >>

AD-EG-CNS-1618 Rev.002 Page 27 of 93 ATTACHMENT 1 Page 3 of 3 The following tables list the rotating FOM PMIDs associated with each innage/outage period.

Cycle/Outage FOM Group PMID#

Cycle/Outage FOM PMID#

Group Ul-15 A

02033094-21,22,23,24 U2-14 A

02033095-17,18,19,20

<< 1EOC15 02033094-17,18,19,20 A

2EOC14 A

02033095-29,30,31,40 Ul-16 B

02033094-29,30,31,32 U2-15 B

02033095-21,22,23,24 1EOC16 B

02033094-25,26,27,28 2EOC15 B

02033095-32,33,34,39 Ul-17 c

02033094-37,38,39,40 U2-16 c

02033095-25,26,27,28 1EOC17 c

02033094-33,34,35,36 2EOC16 c

02033095-35,36,37,38 Ul-18 A

02033094-21,22,23,24 U2-17 A

02033095-17,18,19,20 1EOC18 A

02033094-17,18,19,20 2EOC17 A

02033095-29,30,31,40 Ul-19 B

02033094-29,30,31,32 U2-18 B

02033095-21,22,23,24 1EOC19 B

02033094-25,26,27,28 2EOC18 B

02033095-32,33,34,39 Ul-20 c

02033094-37,38,39,40 U2-19 c

02033095-25,26,27,28 1EOC20 c

02033094-33,34,35,36 2EOC19 c

02033095-35,36,37,38 Ul-21 A

02033094-21,22,23,24 U2-20 A

02033095-17,18,19,20 1EOC21 A

02033094-17,18,19,20 2EOC20 A

02033095-29,30,31,40 Ul-22 B

02033094-29,30,31,32 U2-21 B

02033095-21,22,23,24 1EOC22 B

02033094-25,26,27,28 2EOC21 B

02033095-32,33,34,39 Ul-23 c

02033094-37,38,39,40 U2-22 c

02033095-25,26,27,28 1EOC23 c

02033094-33,34,35,36 2EOC22 c

02033095-35,36,37,38 Ul-24 A

02033094-21,22,23,24 U2-23 A

02033095-17,18,19,20 1EOC24 A

02033094-17,18,19,20 2EOC23 A

02033095-29,30,31,40 Ul-25 B

02033094-29,30,31,32 U2-24 B

02033095-21,22,23,24 1EOC25 B

02033094-25,26,27,28 2EOC24 B

02033095-32,33,34,39 Ul-26 c

02033094-37,38,39,40 U2-25 c

02033095-25,26,27,28 1EOC26 c

02033094-33,34,35,36 2EOC25 c

02033095-35,36,37,38

SNUBBER PROGRAM PLAN

<< Typical Outage Work Process >>

Stroke Testing AD-EG-CNS-1618 Rev.002 Page 28 of 93 ATTACHMENT 2 Page 1 of 2 Stroke testing is a Condition Monitoring activity that is performed on all installed mechanical snubbers on a defined periodic basis. Hand stroking of mechanical snubbers is an excellent method to quickly identify significantly degraded or inoperable snubbers. Based upon manufacturer recommendations it also serves to extend the service life of most mechanical snubbers by distributing internal lubricant. However, stroking does not "fix" an inoperable snubber or enhance the ability of a degraded snubber to pass a functional bench test. Since all installed mechanical snubbers undergo the same activity on the same frequency, stroking is not judged to affect the integrity of inservice sample testing - as the stroking itself is actually part of the service conditions experienced by each snubber.

Prior to the start of a Refueling Outage the Responsible Engineer will provide a list of snubbers to be stroke tested per each model work order to the Job Supervisor and planner (per outage planning milestone dates). This list is to be verified against any existing equipment list generated from the model work orders. Stroke testing consists of unpinning the individual snubber in place and manually inducing motion to verify freedom of motion. For smaller snubbers this is done by hand, while the larger models may require the use of a special tool to induce movement. The Job Supervisor coordinates with the Work Window Manager and Work Control Center to determine the best time frame to stroke each snubber, usually by system. Predefined Model work orders and tasks exist which categorize the stroke testing by operating train, system, and accessibility category. Typically the acce.ssible train related snubbers can be stroked during the appropriate train work weeks immediately prior to the outage. Inaccessible snubbers are usually stroked as soon as possible once the outage starts. The non-train or multiple train related snubbers are generally stroked after the Unit has entered Mode 5 or in windows identified by work control. Due to issues associated with system transients during outages and start up, ND train related snubbers are generally stroked following unit re-start, depending upon ALARA concerns and dose decay rates.

Functional Testing Functional testing on a random sample of snubbers is performed using the Barker/Diacon test bench. Currently four samples are drawn, one for PSA units, one for Anchor/Darling snubbers, one for Lisega snubbers, and one for the steam generator snubbers. 37 snubbers are selected for the PSA tests, while 10% of the others are selected.

Once the snubbers for testing are identified they are listed and supplied to the planner and outage scheduling personnel. Information provided includes location information, impacted equipment, train affected, and LCO implications. The WWM/WCC uses this information to schedule the work orders to remove individual snubbers for testing and enter into TSAIL as applicable. One work order task is written for each snubber to be removed and replaced.

Functional testing requires that the subject snubber be removed from the installation location and transported to the test bench for testing.

SNUBBER PROGRAM PLAN

<< Typical Outage Work Process >>

AD-EG-CNS-1618 Rev.002 Page 29 of 93 ATTACHMENT 2 Page 2of2 The removal and reinstallation of the snubber is performed under one work order, while the testing itself is performed under another unique work order. In accordance with the maintenance procedure MP/O/A/7650/059 each snubber is stroked enough to verify freedom of motion immediately upon removal from the installed location. This is done to immediately identify any obvious operability concerns and is not considered to significantly affect subsequent functional test results. The MNT snubber/hanger crew performs all the physical tasks associated with the snubber testing. Assistance is provided as required by the Responsible Engineer throughout the process Should a failure occur during testing of the initial sample an additional sample must be drawn and tested, as required per the SLC and ASME Code. Further failures result in more testing, until no more failures are observed or the entire population is tested. The Responsible Engineer is accountable for ensuring that all SLC and ASME Code requirements are satisfied.

In very rare instances it may become necessary to substitute another snubber for one that was originally identified in the sample list. One must be very careful when substituting, since it impacts the viability of the statistical sampling methodology. Substitutions should only be considered when accessing the original snubber presents a physical danger to either personnel or plant equipment, and a suitable substitute snubber is available. The substitute snubber must be a "twin" to the original. It must be shown to have been exposed to the same service conditions as the original snubber. Both snubbers should be the same design, size, and age. They must have similar time in service, environmental conditions, orientation, operating conditions, etc. The basis for the substitution must be clearly documented in both the work order documentation and in the Corrective Action Program. Corrective actions must include a plan of action to validate the reliability of the original snubber at the earliest opportunity, or to remove it from the scope of the testing program.

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 HNGNUMB Sys Serial No.

1-A-WG-8534 WG 1-R-CF-1669 CF 1-R-CF-1710 CF 1-R-CF-1728 CF 1-R-ND-0269 ND 1-R-SA-0016 SA 1-R-SA-0022 SA 1-R-SA-0062 SA 1-R-SA-0062 SA 1-A-FD-3007 FD 1-A-KC-3224 KC 1-A-KC-3253 KC 1-A-KC-3716 KC 1-A-KC-3725 KC 1-A-KC-3731 KC 1-A-KC-3738 KC 1-A-KC-37 42 KC 1-A-KC-37 44 KC 1-A-KC-3751 KC 1-A-KC-3757 KC 1-A-KC-4122 KC 1-A-KC-4161 KC 1-A-KC-4955 KC 1-A-N B-3086 NB 1-A-N B-3935 NB 1-A-NB-8072 NB 1-A-N B-8082 NB 1-A-NC-3058 NC 1-A-Nl-4145 NI 1-A-Nl-4179 NI 1-A-Nl-4184 NI 1-A-Nl-4188 NI 1-A-Nl-4219 NI 1-A-Nl-4389 NI 1-A-NS-3040 NS 1-A-NV-3049 NV 1-A-VG-3086 VG 1-A-Vl-3046 VI 1-A-WG-3357 WG 1-A-WG-8619 WG 1-A-WP-3002 WP 1-R-AS-0142 AS 1-R-B B-1428 BB Rev. 002 Page 30 of 93 ATTACHMENT 3 Page 1 of 6

<< Unit 1 Failure History >>

Cy Test F/D Comments cle Type 1

Fun ct F

Dropped 1

FOM F

Dropped 1

FOM F

Hit or stepped on 1

FOM F

Pitting/Corrosion 1

FOM F

Overload 1

FOM F

Transient 1-C89-026 1

FOM F

Transient 1-C89-026 1

FOM F

Transient 1-C89-026 1

FOM F

Transient 1-C89-026 2

Fun ct F

Installation damage 2

Funct F

2 Funct F

2 Funct F

Lubricant 2

Funct F

Dynamic Environment (vibration) 2 Funct F

2 Fu net F

2 Fun ct F

Paint 2

Fun ct F

2 Fun ct F

2 Fun ct F

2 Fun ct F

Paint 2

Fun ct F

Paint 2

Fun ct F

2 Fun ct F

Manufacturing Defect 2

Fun ct F

2 Fun ct F

2 Fun ct F

2 Fun ct F

2 Fun ct F

2 Fun ct F

2 Fun ct F

2 Fun ct F

Paint 2

Fun ct F

2 Fun ct F

2 Fun ct F

2 Funct F

2 Funct F

2 Fun ct F

2 Fun ct F

Paint 2

Fun ct F

2 Fun ct F

2 Fun ct F

2 Fun ct F

HNGNUMB 1-R-BB-1439 1-R-BB-1487 1-R-BB-1506 1-R-BB-1517 1-R-BB-1520 1-R-BB-1573 1-R-BB-1710 1-R-BB-17 42 1-R-BB-1835 1-R-BW-1559 1-R-CA-1665 1-R-CA-1689 1-R-CA-1697 1-R-CF-1566 1-R-CF-1669 1-R-CF-1710 1-R-CF-1731 1-R-KC-0073 1-R-KC-0649 1-R-KC-0814 1-R-KC-0829 1-R-KC-0846 1-R-KC-0848 1-R-KC-0854 1-R-LD-007 4 1-R-N B-0190 1-R-NC-1224 1-R-NC-1273 1-R-NC-1312 1-R-NC-1488 1-R-NC-1806 1-R-NC-2176 1-R-NC-2184 1-R-ND-0226 1-R-ND-0265 1-R-ND-0557 1-R-ND-0596 1-R-Nl-2262 1-R-Nl-2353 1-R-NI-2404 1-R-NM-1081 1-R-NM-1351 1-R-NS-O 115 1-R-NV-0565 1-R-NV-1007 SNUBBER PROGRAM PLAN

<< Unit 1 Failure History >>

Sys Serial No.

Cy Test F/D Comments cle Type BB 2

Fun ct F

BB 2

Fun ct F

BB 2

Fu net F

BB 2

Fu net F

BB 2

Fun ct F

BB 2

Fun ct F

BB 2

Fun ct F

BB 2

Fun ct F

BB 2

Fun ct F

BW 2

Fu net F

CA 2

Fun ct F

CA 2

Fun ct F

CA 2

Fun ct F

CF 2

Fun ct F

CF 2

Fun ct F

CF 2

Fu net F

CF 2

Fun ct F

KC 2

Fun ct F

KC 2

Fun ct F

KC 2

Fu net F

KC 2

Fu net F

KC 2

Fun ct F

KC 2

Fun ct F

KC 2

Fun ct F

LO 2

Fun ct F

NB 2

Fun ct F

NC 2

Fun ct F

NC 2

Fun ct F

NC 2

Fu net F

NC 2

Fun ct F

Paint NC 2

Fun ct F

NC 2

Fu net F

Paint NC 2

Fu net F

Paint ND 2

FOM F

Transient (overload)

ND 2

FOM F

ND 2

Fun ct F

ND 2

Fu net F

NI 2

Fu net F

NI 2

Fu net F

NI 2

Fu net F

NM 2

Fu net F

NM 2

Fu net F

NS 2

Fu net F

NV 2

Fu net F

NV 2

FOM F

AD-EG-CNS-1618 Rev. 002 Page 31 of 93 ATTACHMENT 3 Page 2 of 6

HNGNUMB 1-R-SM-1650 1-R-WL-1172 1-S-NR-5013 1-R-BB-1517 1-R-KC-0846 1-R-LD-007 4 1-R-NC-2176 1-R-Nl-2334 1-R-NS-O 115 1-R-NV-0221 1-A-KC-8009 1-A-KC-8010 1-A-KC-8187 1-A-KC-8194 1-A-KC-8218 1-A-KC-8246 1-A-KC-8259 1-A-NV-8312 1-A-NV-8426 1-A-NV-8478 1-A-WS-8067 1-R-KC-0803 1-R-KC-0846 1-R-N D-0072 1-R-ND-0226 1-R-Nl-2334 1-R-NS-O 102 1-R-NV-1702 1-R-ND-0596 1-R-SM-1606 1-A-NV-8115 1-R-CF-1519 1-R-CF-1726 1-R-NC-1655 1-R-ND-0391 1-R-Nl-1314 1-R-Nl-1384 1-R-SA-0022 1-R-SA-1503 1-R-SM-1011 1-R-SM-1545 1-R-SM-1578 1-R-SM-1650 1-R-N D-0226 1-R-N D-0596 SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 32 of 93 ATTACHMENT 3 Page 3 of 6

<< Unit 1 Failure History >>

Sys Serial No.

Cy Test F/D Comments cle Type SM 2

Fun ct F

WL 2

Fun ct F

NR 2

Fun ct F

BB 3

Funct F

KC 3

Funct F

LO 3

Funct F

NC 3

Fun ct F

NI 3

FOM F

NS 3

Fun ct F

NV 3

FOM F

KC 4

Fu net F

Defect in gear clearances KC 4

Fu net F

Defect in gear clearances KC 4

Fun ct F

Defect in gear clearances KC 4

Fun ct F

Defect in gear clearances KC 4

Fun ct F

Defect in gear clearances KC 4

Fun ct F

Defect in gear clearances KC 4

Fun ct F

Defect in gear clearances NV 4

Fu net F

Defect in gear clearances NV 4

Funct F

Defect in gear clearances NV 4

Fun ct F

Defect in gear clearances ws 4

Fun ct F

Defect in gear clearances KC 4

Fun ct F

Defect in gear clearances KC 4

Fun ct F

ND 4

Fu net F

Defect in gear clearances ND 4

FOM F

Transient (overload)

NI 4

FOM F

NS 4

FOM F

NV 4

Vis F

Load pin missing ND 5

FOM F

SM 5

FOM F

Improper installation of capstan spring NV 6

FOM D

CF 6

FOM D

CF 6

FOM F

NC 6

FOM F

ND 6

FOM D

NI 6

FOM F

NI 6

Funct F

SA 6

FOM D

SA 6

FOM D

SM 6

FOM D

SM 6

FOM D

SM 6

FOM D

SM 6

FOM F

ND 6

FOM F

Transient (overload)

ND 6

FOM F

HNGNUMB 1-R-BB-1762 1-R-BB-1827 1-R-B B-1830 1-R-CF-1502 1-R-CF-1705 1-R-CF-1728 1-R-CF-1731 1-R-KC-0814 1-R-ND-0226 1-R-ND-0596 1-R-ND-0624 1-R-CA-1505 1-R-CF-1003 1-R-CF-1539 1-R-CF-1539 1-R-CF-1544 1-R-NC-1655 1-A-KC-3219 1-A-KC-4228 1-A-WG-8663 1-R-CF-1517 1-R-CF-1562 1-R-LD-0085 1-R-NC-1071 1-R-NC-1628 1-R-NC-1655 1-R-NC-2302 1-R-SM-1606 1-S-NR-5002 1-S-NR-5007 1-R-KD-0022 1-R-NV-1007 1-R-SA-1530 1-A-Nl-4378 1-R-BB-1492 1-R-CF-1022 1-R-NC-0042 1-R-NV-0274 1-R-VN-0007 1-R-VN-0048 1-R-CF-1726 1-R-KC-0038 1-R-NV-0004 1-R-SM-1590 1-R-ND-0226 SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 33 of 93 ATTACHMENT 3 Page 4 of 6

<< Unit 1 Failure History >>

Sys Serial No.

Cy Test F/D Comments cle Type BB 7

FOM F

BB 7

FOM F

BB 7

FOM F

CF 7

FOM D

CF 7

FOM D

Pipe Clamp rotated CF 7

FOM F

CF 7

FOM D

KC 7

Fun ct F

ND 7

FOM F

Transient (overload)

ND 7

FOM F

ND 7

FOM D

CA 8

FOM D

Spherical Bearing unstaked CF 8

FOM D

Spherical Bearin~ unstaked CF 4786 8

FOM D

CF 4979 8

FOM D

CF 19880 8

FOM D

NC 18153 8

FOM F

Changed to Lisega KC 9

VIS D

Misaligned clamp KC 9

VIS D

WG 9

VIS D

CF 9

VIS D

CF 9

VIS D

LO 12019 9

Fun ct F

Stepped on, corrosion.

NC 9

VIS D

NC 9

Fun ct D

Arc strike NC 18169 9

FOM F

Changed to Lisega NC 8868 9

Fun ct D

SM 322/80 9

FOM D

NR 9

VIS D

NR 9

VIS D

Misaligned clamp KO 9

FOM D

Vibration (rough stroke)

NV 9

FOM F

SA 9

Vis F

Pivot pin missing NI 10 Fun ct F

Shaft bent, stepped on NA 7150 10 FOM D

Spare from stock was corroded CF 18220 10 FOM D

Possibly used rebuilt parts NC 7239/79 10 Fun ct D

Small spikes on drag test NV 12284/81 10 Fun ct D

Drag > 3%, but < 5%

VN 17466/81 10 Fun ct D

Had been water filled at some point VN 9786/80 10 FOM F

Extreme corrosion, had been water-filled.

CF 16357/82 11 FOM F

Damaged by craft (twisted) during outage KC 4230/78 11 Fun ct D

Fretting corrosion NV 11 Fun ct D

Tube unstaked SM 4791/79 11 Fun ct D

Fretting corrosion ND 40121/98 12 FOM F

Transient (overload)

HNGNUMB 1-A-NV-3188 1-R-CF-1562 1-R-CF-1564 1-R-ND-1191 1-R-SM-1542 1-R-ND-0226 1-R-N D-0268 1-R-ND-0596 1-R-KC-0111 1-R-ND-0226 1-R-ND-0596 1-R-SM-1680 1-R-VN-0051 1-R-N D-0397 1-R-VN-0094 1-A-KC-3353 1-A-KC-4930 1-R-CF-1543 1-R-CF-1681 1-R-ND-0226 1-R-ND-0596 1-R-RN-0195 1-R-SM-1549 1-R-SM-1578 1-R-VN-0051 1-A-NV-8475 1-A-VG-3158 1-R-BB-1573 1-R-NC-2227 1-R-Nl-1353 1-R-Nl-2337 1-R-Nl-2338 1-R-Nl-2405 1-R-VN-0015 1-R-CF-1562 1-R-ND-0226 1-R-NV-1415 1-R-NV-1577 1-A-NB-3513 1-A-NB-3514 1-R-KC-0811 1-R-ND-0226 1-R-ND-0596 SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 34 of 93 ATTACHMENT 3 Page 5 of 6

<<Unit 1 Failure History>>

Sys Serial No.

Cy Test F/D Comments cle Type NV 12 FOM D

FrettinQ corrosion CF 12 FOM D

Fretting corrosion CF 12 FOM D

FrettinQ corrosion ND 12 FOM D

Transient SM 12 FOM D

Fretting corrosion ND 3448/78 12 FOM F

Transient (overload)

Damaged by hammer strikes on tube ND 10012/1979 12 FOM D

cover ND 5486/79 12 FOM F

Transient (overload in tension)

KC 4199/78 13 FOM D

Fretting corrosion ND 40263/99 13 FOM F

Transient (overload)

ND 17604/83 13 FOM F

Transient (overload in tension)

SM 13 FOM D

Fretting corrosion VN 13 FOM D

Rough drag(tested OK - WO 98490666)

ND 9800/1998 13 FOM D

Transient VN 13 FOM D

Replaced as follow up to 1EOC12 KC 10671/80 14 Fun ct F

Extreme corrosion, had been water-filled.

KC 13262/81 14 Fun ct D

Boron corrosion (wo 98580366-02)

CF 8721/79 14 Funct D

Internal corrosion (replace 1EOC15)

CF 3019/78 14 FOM D

Rough Drag (replaced wo 98635714)

ND 41709/01 14 FOM F

Transient (overload) PIP C-03-7095 ND 14 FOM F

Transient (overload) PIP C-03-7095 Paddle end loose (replaced wo RN 2828/77 14 Fun ct D

98580367)

SM 12054/81 14 FOM D

Rough drag (replaced wo 98635713)

SM 4987/78 14 FOM F

Locked (replaced wo 98635803)

VN 14 FOM D

Rough drag (tested OK - WO 98628388)

NV 15 FOM D

Corroded, some vibration VG 14192/82 15 Funct D

Erratic Acceleration test BB 10146/80 15 FOM F

Internal corrosion (previous installation?)

NC 9886/80 15 Fu net D

Stroked erratic NI 8707/79 15 FOM D

Erratic acceleration test NI 5512/79 15 FOM F

High drag -replaced with Lisega NI 7630/80 15 FOM F

verv high drag - replaced with LiseQa NI 2467/78 15 FOM D

Hard to stroke during PM VN 9788/80 15 Funct D

Degraded drag test CF 4709/78 16 Funct D

Tension Test Load low (replaced)

ND 16 FOM F

Transient (overload) PIP C-06-08283 NV 16 FOM D

Rough Stroke (replaced as PM)

NV 16 FOM D

Rough Stroke (replaced as PM)

NB 16 FOM D

PIP C-06-05906 NB 16 FOM D

PIP C-06-05906 (locks after 1/8")

KC 16 FOM D

Rough stroke, PIP C-06-04983 ND 41725/00 16 FOM F

Transient (overload) PIP C-05-4153 ND 3040000206 16 FOM D

Paddle End Loose (PIP C-06-06104)

HNGNUMB 1-A-Nl-4147 1-R-FW-0001 1-R-NC-1536 1-R-ND-0181 1-R-RN-0130 1-R-SB-2044 1-R-SM-1542 1-A-KC-8011 1-A-KC-8652 1-A-Nl-4137 1-R-NC-1633 1-R-Nl-2404 1-R-SM-1566 1-R-KC-1477 1-A-KC-4232 1-R-KC-0592 1-R-ND-0341 1-R-NC-1655 SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 35 of 93 ATTACHMENT 3 Page 6 of 6

<< Unit 1 Failure History >>

Sys Serial No.

Cy Test F/D Comments cle Type NI 11186/79 17 FOM F

Locked - PIP C-08-3001 (repl. w/ Liseqa FW 4344/78 17 FOM D

Submerged in trench C-08-03061 NC 17 FOM D

Locks @ full ext, rep! w/Lis C-08-2768 ND 6044/79 17 Funct D

erratic drag, rep/lis C-08-03040 RN 17 FOM D

twisted by CMP personnel C-08-3513 SB 12019/81 17 FOM F

C-08-02996 SM 3466/78 17 FOM D

C-08-03041 KC 8835/80 18 Fun ct D

C-09-06872 (replace w/ Lisega)

KC 10107/80 18 Fun ct D

C-09-06783 (replace w/ Lisega)

NI 7235/79 18 FOM D

C-09-06855 (replace w/ Lisega)

NC 18 Fun ct D

C-09-06872 (replace w/ Lisega)

NI 15697/82 18 Funct D

C-09-06797 (replace w/ Lisega)

SM 3305/1978 18 Funct D

replaced with new PSA 35 as PM KC 5450/1978 19 FOM F

C-11-3619; mass loose - dropped?

KC 3493/1978 20 FOM D

C-12-10318 (replace w/ Lisega)

KC 8570/1979 20 Fun ct D

C-12-10193 (replace w/ Lisega)

ND 9679/1980 20 Fun ct D

C-12-10439 (replace w/ Lisega)

NC 6129706/93 21 Fun ct D

Leaking, low fluid C-14-5326

SNUBBER PROGRAM PLAN

<< Unit 2 Failure History >>

HNGNUMB SYSTEM S/N EOC Test F/D Size Type 2-A-CF-4001 CF 1112 1

Fu net F

PSA 1/2 2-A-FW-4005 FW 12050 1

Fun ct F

PSA 1/2 2-A-KC-4167 KC 11740 1

Fun ct F

PSA 1/2 2-A-Nl-4269 NI 12198 1

Fun ct F

PSA 1/2 2-A-Nl-4278 NI 15358 1

Fun ct F

PSA 1/2 2-A-NV-3629 NV 13822 1

Fu net F

PSA 1/2 2-A-NV-3840 NV 12054 1

Fu net F

PSA 1/2 2-R-BB-1062 BB 13656 1

Fun ct F

PSA 1/2 2-R-BB-1092 BB 15707 1

Fun ct F

PSA 1/2 2-R-BB-1095 BB 15527 1

Fun ct F

PSA 1/2 2-R-BB-1518 BB 7219 1

Fun ct F

PSA 1/2 2-R-BB-1527 BB 16370 1

Fun ct F

PSA 1/2 2-R-BB-1529 BB 13723 1

Fu net F

PSA 1/2 2-R-BB-1529 BB 12038 1

Fun ct F

PSA 1/2 2-R-BB-1529 BB 16468 1

Fun ct F

PSA 1/2 2-R-BB-1531 BB 15691 1

Fun ct F

PSA 1/2 2-R-BB-1541 BB 17423 1

Fun ct F

PSA 1/2 2-R-BB-1546 BB 14200 1

Fun ct F

PSA 1/2 2-R-BB-1547 BB 13762 1

Fun ct F

PSA 1/2 2-R-BB-1569 BB 16469 1

Fu net F

PSA 1/2 2-R-CA-1530 CA 14261 1

Fun ct F

PSA 1/2 2-R-CA-1681 CA 17394 1

Fun ct F

PSA 1/2 2-R-CF-1626 CF 16348 1

Fun ct F

PSA 1/2 2-R-CF-1628 CF 10618 1

FOM F

PSA 1/2 2-R-CF-1686 CF 17493 1

Fun ct F

PSA 1/2 2-R-CF-1706 CF 17395 1

Fun ct F

PSA 1/2 2-R-FW-0039 FW 15533 1

Fun ct F

PSA 1/2 2-R-FW-0057 FW 13503 1

Fu net F

PSA 1/2 2-R-KD-0039 KO 15949 1

Fu net F

PSA 1/2 2-R-LD-0003 LO 13209 1

Fu net F

PSA 1/2 2-R-NC-1007 NC 13263 1

Fun ct F

PSA 1/2 2-R-NC-1035 NC 14811 1

Fun ct F

PSA 1/2 2-R-ND-0440 ND 15825 1

Fu net F

PSA 1/2 2-R-Nl-1027 NI 16445 1

Fu net F

PSA 1/2 2-R-Nl-1585 NI 13278 1

Fun ct F

PSA 1/2 2-R-Nl-1626 NI 16388 1

Fun ct F

PSA 1/2 2-R-Nl-1865 NI 11124 1

Fun ct F

PSA 1/2 2-R-NR-0011 NR 13246 1

Fun ct F

PSA 1/2 2-R-NV-0243 NV 14252 1

Fun ct F

PSA 1/2 2-R-NV-0266 NV 13508 1

FOM F

PSA 1/2 AD-EG-CNS-1618 Rev. 002 Page 36 of 93 ATTACHMENT 4 Page 1 of 5 Comments Mishandling Mishandling - Twisted guide rods Mishandling Mishandling - Twisted guide rods Mishandling - Twisted guide rods Corrosion Mishandling - Twisted guide rods Mishandling Insulation on cylinder Mishandling - Twisted guide rods Mishandling - Twisted guide rods Mishandling Weld Spatter Mishandling - Twisted guide rods Mishandling Mishandling - Twisted guide rods Mishandling - Twisted guide rods Mishandling MishandlinQ - Twisted guide rods

_J

HNGNUMB 2-R-NV-1899 2-R-SA-1503 2-R-TE-0050 2-R-YC-0048 2-A-CA-4040 2-A-NV-3629 2-R-BB-1095 2-R-BB-1527 2-R-BB-1529 2-R-BB-1529 2-R-BB-1531 2-R-BB-1546 2-R-BB-1547 2-R-BB-1547 2-R-BB-1567 2-R-CA-1589 2-R-CA-1592 2-R-CA-1625 2-R-CA-1646 2-R-CA-1650 2-R-CA-1660 2-R-CA-1662 2-R-CA-1671 2-R-CA-1673 2-R-CF-1628 2-R-FW-0039 2-R-KC-0276 2-R-ND-0165 2-R-ND-0195 2-R-ND-0277 2-R-ND-0407 2-R-NV-0266 2-R-NV-1074 2-R-SA-1503 2-R-SM-1721 2-R-CA-1586 2-R-ND-0277 2-R-ND-0326 2-R-SA-1503 2-R-NC-1026 2-R-NC-1527 2-R-Nl-1005 SNUBBER PROGRAM PLAN

<<Unit 2 Failure History>>

SYSTEM S/N EOC Test F/D Size Type NV 15699 1

Fu net F

PSA 1/2 SA 4613 1

FOM F

PSA 1 TE 14299 1

Fun ct F

PSA 1/2 YC 14611 1

Fun ct F

PSA 1/2 CA 1036 2

Fun ct F

AD-70R NV 17424 2

Fun ct F

PSA 1/2 BB 10181 2

Funct F

PSA 1/2 BB 9905 2

Funct F

PSA 1/2 BB 12051 2

Fu net F

PSA 1/2 BB 15338 2

Fun ct F

PSA 1/2 BB 14326 2

Fun ct F

PSA 1/2 BB 1030 2

Fun ct F

AD-70R BB 1028 2

Fun ct F

AD-70R BB 1031 2

Fu net F

AD-70R BB 1038 2

Fun ct F

AD-70R CA 1025 2

Fun ct F

AD-70R CA 1029 2

Funct F

AD-70R CA 1021 2

Fun ct F

AD-70R CA 1018 2

Fu net F

AD-70R CA 1019 2

Fu net F

AD-70R CA 1027 2

Fun ct F

AD-70R CA 1033 2

Fun ct F

AD-70R CA 1032 2

Fun ct F

AD-70R CA 1041 2

FOM F

AD-70R CF 1020 2

Funct F

AD-70R FW 1026 2

Funct F

AD-70R KC 6421 2

Fu net F

PSA3 ND 1045 2

Funct F

AD-70R ND 2

FOM F

PSA 1/2 ND 8043 2

FOM F

PSA 1 ND 1039 2

Funct F

AD-70R NV 1034 2

Fu net F

AD-70R NV 13577 2

FOM F

PSA 1/2 SA 2

FOM F

PSA 1 SM 2

FOM F

PSA 1/2 CA 9447 3

Fun ct F

PSA 1 ND 3373 3

FOM F

PSA 1 ND 16387 3

FOM F

PSA 1/2 SA 17446 3

FOM F

PSA 1 NC 12887 4

Fun ct F

PSA3 NC 10047 4

Fun ct F

PSA3 NI 12873 4

Fun ct F

PSA3 AD-EG-CNS-1618 Rev. 002 Page 37 of 93 ATTACHMENT 4 Page 2 of 5 Comments Mishandling - Twisted guide rods Paint on cylinder Inadequate staking Insufficient staking

SNUBBER PROGRAM PLAN

<< Unit 2 Failure History >>

HNGNUMB SYSTEM SIN EOC Test F/D Size Type 2-R-RN-0006 RN 4978 4

Fun ct F

PSA 10 2-R-SM-1553 SM 6

FOM D

PSA 10 2-R-SM-1557 SM 6

FOM D

PSA 10 2-R-SM-1668 SM 6

FOM D

PSA3 2-R-ND-0370 ND 7

FOM D

2-R-NV-1074 NV 13577 7

FOM D

PSA 1/2 2-R-NC-1724 NC 11956 7.5 FOM F

PSA 10 2-R-AS-2115 AS 9778 8

FOM F

PSA 1 2-R-LD-0003 LO 14673 8

FOM D

PSA 1/2 2-R-LD-0019 LO 16386 8

FOM D

PSA 1/2 2-R-Nl-1872 NI 8376 8

Fu net D

PSA 1 2-R-SM-1606 SM 503 8

FOM D

PSA 10 2-R-SM-1608 SM 11966 8

FOM D

PSA10 2-R-VN-0010 VN 1091 8

Funct D

PSA 1 2-A-KC-3637 KC 19921 9

Fu net F

PSA3 2-R-NV-0245 NV 9641 9

Fun ct D

PSA3 2-R-SA-1519 SA 8483/79 9

Fun ct D

PSA3 2-R-KC-0553 KC 17507/83 9.5 Fun ct F

PSA 1/2 2-R-CA-0132 CA 15274/82 10 Fun ct D

PSA 1/2 2-R-NC-1704 NC 12050/81 10 Fun ct D

PSA 10 2-R-NV-0243 NV 15806/82 10 Fun ct D

PSA 1/2 2-R-SM-1610 SM 11939/81 10 FOM F

PSA 10 2-A-NV-3631 NV 15885/82 11 FOM D

PSA 1/2 2-R-CF-1523 CF 2585/77 11 PM D

PSA 10 2-R-CF-1586 CF 8685/79 11 PM D

PSA3 2-R-NC-1707 NC 12843/80 11 Fun ct D

PSA3 2-R-ND-0277 ND 4364/1978 11 FOM F

PSA 1 2-R-NM-1079 NM 3341/1978 11 PM D

PSA 1 2-R-NM-1158 NM 10144/80 11 PM D

PSA 1/2 2-R-RN-0036 RN 8595/79 11 FOM D

PSA 1 2-R-SA-1504 SA 17527/81 11 FOM D

PSA 1 2-R-SM-1537 SM 11 FOM D

PSA35 2-R-SM-1612 SM 343/1980 11 PM D

PSA 10 2-R-VN-0051 VN 8040/80 11 FOM D

PSA 1 2-R-CF-1584 CF 12023/81 12 Fu net D

PSA 10 2-R-SM-1606 SM 566/1991 12 FOM D

PSA 10L 2-R-VN-0007 VN 7201/1980 12 FOM D

PSA 1 2-R-VN-0012 VN 2691/1980 12 FOM D

PSA 1 AD-EG-CNS-1618 Rev.002 Page 38 of 93 ATTACHMENT 4 Page 3 of 5 Comments Loose bearing, snubber good Loose bearing, snubber good Rod eye bent, snubber good Anchors loose, snubber good Rough stroke LOOP Transient Non-QA, obvious hammer load Rough stroke, vibration induced Rough stroke, vibration induced Tests OK, end rotates (set screws)

Rough stroke, test OK, very rusty Rough stroke.High drag, rusty Dent on tube, some rubbing evident No lock-up, vibration failure Erratic spikes, locked on 2nd test Fretting High drag, fretting due to vibration Transient (PIP C00-1138)

Fretting (PIP C00-1327)

Replace Rough drag - fretting corrosion Rough stroke, test OK, very rusty Rough stroke, test OK, very rusty Boron intrusion/corrosion PIP C-01-3425 (Transient) fretting corrosion bent paddle end PIP C-01-5124 Paddle end unstaked - Test OK Rough drag - High heat paddle end Paddle end unstaked - restaked WO 98265762 2EOC10 follow up (WO 98247648)

Verv rusty - replaced Very rusty Loose bearing, snubber good Follow up test OK (WO 98577942-01 )

SNUBBER PROGRAM PLAN

<<Unit 2 Failure History>>

HNGNUMB SYSTEM S/N EOG Test F/D Size Type 2-R-VN-0053 VN 8606/1980 12 FOM D

PSA 1 2-R-KC-0541 KC 13993/1981 13 Fun ct F

PSA 1/2 2-R-NC-1520 NC 11953/1980 13 Fun ct D

PSA3 2-R-NV-1905 NV 9845/1979 13 Funct D

PSA 1 2-R-SM-2021 SM 13 FOM D

PSA100L 2-R-LD-0003 LD 14404/1982 13.5 FOM D

PSA 1/2 2-R-VN-0053 VN 8606/1980 13.5 FOM D

PSA 1 2-R-BB-1033 BB 14 FOM D

PSA 1/2 2-R-CF-1002 CF 9311/1979 14 Funct D

PSA3 2-R-KC-0541 KC 41793/2001 14 Fun ct F

PSA 1/2 2-R-KD-0067 KO 5462/1978 14 Fun ct D

PSA 1 2-R-NC-1675 NC 10048/1979 14 Fun ct D

PSA3 2-R-NC-1717 NC 11565/1981 14 Fun ct D

PSA 10 2-R-ND-0277 ND 8718/1979 14 FOM F

PSA 1 2-R-NV-1905 NV 41726/2000 14 Fu net D

PSA 1 2-R-SA-0062 SA 16406/1982 14 Fun ct D

PSA 1/2 2-A-NV-3631 NV 41241/1999 14.5 FOM D

PSA 1/2 2-R-KF-0029 KF 19746/1981 14.5 FOM D

PSA3 2-R-ND-0457 ND 13022/1981 14.5 FOM F

PSA 1/2 2-A-NV-3840 NV 12988/1981 15 FOM D

PSA 1/2 2-R-NR-0013 NR 9909/1980 15 Fun ct D

PSA 1/2 2-S-NR-5524(b)

NR 12036/1980 15 Fun ct F

PSA 1/2 2-A-Nl-4349 NI 15823/1982 16 FOM F

PSA 1/2 2-A-RN-3209 RN 20812/1994 16 Fun ct F

PSA 1/2 2-A-RN-3213 RN 20813/1994 16 Fun ct F

PSA 1/2 2-R-BB-1081 BB 13761/1981 16 FOM F

PSA 1/2 2-R-FW-0003(a)

FW 11552/1981 16 FOM F

PSA 10 2-R-FW-0003(b)

FW 11568/1981 16 FOM F

PSA 10 2-R-SB-2040 SB 28201/1983 16 FOM F

PSA3 2-R-TL-2083 TL 8476/1980 16 FOM F

PSA 1 2-A-CA-4040 CA 1072/1988 19 Fun ct F

AD70R 2-R-HR-2083 HR 8745/1979 19 FOM D

PSA3 2-R-Nl-1862 NI 19 VIS F

PSA 1/2 2-R-SB-2041 SB 25221/1982 19 FOM D

PSA3 2-R-SM-2025 SM 19 FOM D

PSA 100 AD-EG-CNS-1618 Rev.002 Page 39 of 93 ATTACHMENT 4 Page 4 of 5 Comments Pipe attachment misaligned Fretting (PIP C-04-04944)

Replace Replace Replace Rough stroke, vibration induced Rough, to be replaced later as PM Sticks at 1 "; repl. w/lisega(C 2862)

Replace w/ Lisega (C-06-2218)

Fretting (PIP C-06-02557);repl.

w/lisega Replace w/ Lisega (C-06-2161)

Erratic drag, replace as PM Final drag erratic, replace w/

Lisega PIP C-06-02961 Replace w/ Lisega (C-06-2219)

Replace w/ Lisega (C-06-2137) initial stroke difficult (PIP C 0777)

PIP C-07-3851, replace w/ Lisega Stroke ok for 1/2", PIP C-06-4843 High drag Rough Drag, Replace as PM Dropped - not service related Dropped C-09-02017 CMP Improper handling C 01661 CMP Improper handling C 01958 Twisted PIP C-09-02073 PIP C-09-1890 PIP C-09-1890 PIP C-09-1982 PIP C-09-1982 PIP C-13-07911 (mishandling) no hand drag less than 1" C 8178 unpinned C-13-0867 4 hand stroke only 1/4" C-13-7971 Spherical bearing cracked C SNUBBER PROGRAM PLAN

<< Unit 2 Failure History >>

HNGNUMB SYSTEM S/N EOC Test F/D Size Type 2-R-SM-2039 SM 42254C/2005 19 FOM D

PSA 100 2-R-AS-2115 AS 40035/1998 20 FOM F

PSA 1 2-R-BB-1546 BB 1056/1988 20 Fun ct D

AD?OR 2-R-CF-1588 CF 12058/1981 20 Fu net D

PSA 10 2-R-NV-0095 NV 15553/1982 20 Fu net D

PSA 1/2 8951 AD-EG-CNS-1618 Rev. 002 Page 40 of 93 ATTACHMENT 4 Page 5 of 5 Comments Rough. High drag C-13-8972 Overstroked C-15-1903 Degraded bleed tension, C 2234 Tube rotated after test, C-15-2237 Degraded tension drag, C 1911

SNUBBER PROGRAM PLAN

<<Outage Summary Template>>

At the start of Outage #

the snubber population was as described below:

Total number of PSA snubbers installed:

Number of Safety Related PSA snubbers installed:==

Total number of Anchor/Darling snubbers installed:=

Number of Safety Related Anchor/Darling snubbers installed: =

Total number of Lisega pipe snubbers installed:==

Number of Safety Related Lisega snubbers installed:

Total number of SG snubbers installed:

Total number of snubbers installed:

Functional Test Details (TR 16.9-13 & ISTD-5000)

AD-EG-CNS-1618 Rev. 002 Page 41 of 93 ATTACHMENT 5 Page 1 of 3 The Test Population consists of Safety Related snubbers only. Functional testing per ISTD-5000 requires that an initial test sample consist of the following number of snubbers relative to the Test Population:

37 PSA snubbers (ISTD-5400) 10% of Anchor/Darling=_ snubbers (ISTD-5300) 10% of Lisega pipe snubbers = __ snubbers (ISTD-5300) 10% of SG snubbers = __ snubber (ISTD-5253, ISTD-5300)

The above numbers are compared to the sample snubbers listed as actually tested in Work Orders and

====-

-~~~~-

Testing pipe snubbers, WO #=======

Number of PSA snubbers tested:

Failures:

Number of Anchor/Darling snubbers tested:= Failures:

Number ofLisega pipe snubbers tested:== Failures:

Testing SG snubbers, WO #

Number of SG snubbers tested:

Failures:

SNUBBER PROGRAM PLAN

<<Outage Summary Template>>

Visual Examination Details (TR 16.9-13 & ISTD-4200):

Accessible Snubbers o Number of Accessible snubbers:

o Latest Work Orders Train A WO#

Completed Date:====

Train B WO#

Completed Date: ___ _

Non-train WO#

Completed Date: ___

=

o No. of visual failures in current interval:

o Previous Interval:

months o Next Interval Duration:

months AD-EG-CNS-1618 Rev.002 Page 42 of 93 ATTACHMENT 5 Page 2 of 3

• (per ASME OM Table ISTD-4252-land previous examination results) o Next due ---=

Inaccessible Snubbers o Number oflnaccessible snubbers:

o Latest Work Order#

Completed Date: ____ _

o No. of visual failures in current interval:

o Previous Interval: __ cycles (_months)

• Next Interval Duration: __ cycles ( __ months)

• (per ASME OM Table ISTD-4252-land previous examination results) o Next due Outage -----

Freedom of Motion Details (TR 16.9-13 & ISTD-6000) o Service Life Monitoring/PM Stroke Program No. of snubbers stroked current outage:

No. of snubbers stroked non-outage prior to current outage:

No. of snubbers failed:

No. of snubbers degraded:

=

o Strokes due to suspected transient(s) =

Service Life Acceptability (TR 16.9-13 & ISTD-6200)

Service Life oflnstalled Snubbers has not been exceeded and will not be exceeded prior to the next scheduled surveillance.

Verified by:

Date:

Basis Comments (review of pertinent data, seal life, etc... ):

Review of data indicates approximately __ % of snubbers physically worked (tests + strokes) during

--- showed indications of degradation. Actual count was_ out of __ snubbers worked.

Including the non-outage scope the total percentage is even less. The rate for Safety Related snubbers was much less than 0.5%. This is a decreasing trend from previous cycles where 3% to 5% where degraded or replaced as PM. One third of all snubbers are stroked each cycle on a repeating 3-cycle rotation. This was the third rotation for this group of snubbers and the results indicate that this practice is improving population reliability. All results indicate that the population is acceptable for service through the next cycle.

SNUBBER PROGRAM PLAN

<< Outage Summary Template >>

General Comments Specific Snubber Functional Test Notes AD-EG-CNS-1618 Rev.002 Page 43 of 93 ATTACHMENT 5 Page 3 of 3

SNUBBER PROGRAM PLAN

<< General Service Life Monitoring Information >>

ISTD-6200 Requirements (OM-2014 Proposal)

AD-EG-CNS-1618 Rev. 002 Page 44 of 93 ATTACHMENT 6 Page 1 of 4 The service life for each location where a snubber is installed shall be reevaluated at least once each fuel cycle. Reevaluation shall be based on examination, maintenance, performance, and operating service life history data associated with representative snubbers that have been in service in the plant, as well as other information related to service life. Completion of this reevaluation shall be documented in accordance with ISTD-9300(b}. Examples of methods that can be used to obtain such data are described in Non mandatory Appendix F of this Division. Based on the results of the reevaluation, each snubber's service life shall be increased, decreased, or left unchanged.

If any snubber's reevaluated service life will be exceeded before the next scheduled system or plant outage, one of the following actions shall be taken prior to the start of the cycle:

(a) the snubber shall be replaced with a snubber for which the service life will not be exceeded before the next scheduled system or plant outage (b)technical justification shall be documented for extending the service life to or beyond the next scheduled system or plant outage (c) the snubber shall be reconditioned such that its service life is extended to or beyond the next scheduled system or plant outage General Requirements The snubber program shall include a Service Life Monitoring component that addresses the following:

1.

Each installed snubber within the program scope shall have an estimated service life established and documented.

2.

A listing providing the service life value of each snubber is to be maintained.

3.

Snubber service life values shall be reviewed each cycle and those snubbers that will reach end of life during the upcoming cycle are to be identified for replacement or refurbishment.

4.

Previously established Service Life values for every installed snubber shall be evaluated each fuel cycle for continued applicability. Based upon the evaluation the estimated service life values may remain as previously established, reduced, or increased. The snubber listing shall be updated to reflect the evaluation results. The evaluation methodology and basis for conclusions are to be clearly documented in an appropriate site process and available for retrieval and review.

5.

Prior to the beginning of each fuel cycle (start up following refueling}, it must be documented that all installed snubbers have a service life that will not be exceeded prior to either the next refuel outage or next scheduled maintenance activity for that snubber.

SNUBBER PROGRAM PLAN

<< General Service Life Monitoring Information >>

Implementation

1.

Establishing Initial Service Life AD-EG-CNS-1618 Rev.002 Page 45 of 93 ATTACHMENT 6 Page 2 of 4 An initial service life value should be established for each installed snubber. Historically the industry practice was for establishing the initial value was simply an estimated life based upon recommendations of the OEM (Original Equipment Manufacturer). It should be recognized that these recommended values are generally based upon ideal conditions and often used as marketing tools rather than factual experience; Some manufacturers have published revised expectations and/or added caveats regarding maintenance practices.

If establishing an initial base line service life value the manufacturer's recommendations should be combined with industry and site operating experience to develop a realistic value. Application and location specific conditions should be considered to adjust the service life according to the actual operating environment of individual snubbers.

Governing parameters for service life should be clearly identified. For instance, in most cases the most critical component for the service life of a hydraulic snubber can be assumed to be the seals. The seal life as defined by the supplier will typically govern the snubber life expectancy. However, other components such as the fluid or poppet springs should be considered. For mechanical snubbers it may be that the lubricant is a governing part, or possibly a bearing or spring element - depending upon the design and application.

2.

Snubber Listing The snubber listing should provide sufficient details to readily identify the remaining service life expected for any given snubber installed in the plant. The list may be reported from a comprehensive data base or may be summary information compiled from other available program sources (record keeping spreadsheets, maintenance records, etc.). Information that should be retrievable and/or calculable for each snubber includes:

a.

Manufacture date

b.

Installation date

c.

Actual refurbishment dates (if applicable)

d.

Projected service life (expected duration)

e.

Projected date for replacement/refurbishment

SNUBBER PROGRAM PLAN

<< General Service Life Monitoring Information >>

3.

Scheduling Review AD-EG-CNS-1618 Rev.002 Page 46 of 93 ATTACHMENT 6 Page 3 of 4 Data from the snubber listing shall be reviewed each cycle and all snubbers that will be due for either refurbishment or replacement during the next cycle are to be identified. This review should be completed early enough prior to the next outage to allow for proper planning and scheduling of the end of life activities.

All snubbers that will reach their service life limit during the next cycle must be identified in order to complete the required actions during the outage preceding the end of life date. Accessible snubbers should be also be included and reviewed to ensure that the required service life activities can be scheduled and completed during non-outage periods prior to the end of life date. It may be that operational or logistical considerations make it desirable to perform those activities during the outage even though the snubbers are accessible at power.

4.

Service Life Reevaluation Each cycle the actual expected service life values for each snubber must be reviewed and evaluated for the installed location. The purpose of this evaluation is to either validate the current established value, develop a basis to extend the service life, or to reduce the estimated service life expectancy. This is done for each and every snubber installed in the plant, and the snubber listing must be updated as appropriate. The evaluation is to be completed prior to the unit restart from the outage. Although each snubber service life must be evaluated, it is possible to use groupings of similar snubbers in similar applications to develop a basis for multiple snubbers concurrently. It is important to note that in the event the reevaluation reduces the service life of any snubber an complete extent of condition review must be performed to ensure that all other installed snubbers subject to a reduced life are adequately addressed prior to restart.

A methodology and basis for reevaluation should be developed and documented. Results of functional testing should be considered for trending. A program of periodic disassembly examinations for the purpose of evaluating service life may prove helpful. The maintenance history of each snubber should be included and utilized to evaluate the service life. When snubbers are refurbished the internal components should be inspected and evaluated for trending input. Seals that are replaced should be inspected and possibly tested to determine if the replacement interval is appropriate for the wear /aging that is actually seen. Results of preventive maintenance testing or other monitoring activities should be included in the service life reevaluation process.

5.

Documentation Prior to restart following each outage the reevaluation of service life shall be documented. The documentation should clearly state the results of the reevaluation and that all snubbers in the subject population are acceptable for the duration of the upcoming cycle (or, in the case of accessible snubbers, until their next scheduled maintenance). Reference to or discussion of the basis for this determination should be included.

SNUBBER PROGRAM PLAN

<< General Service Life Monitoring Information >>

AD-EG-CNS-1618 Rev.002 Page 47 of 93 ATTACHMENT 6 Page 4 of 4 The exact form and format of this documentation depends upon site specific processes. Some examples might be: incorporation into a startup procedure, an inspection procedure sign off, a formal report, or an entry into the Corrective Action Program.

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 48 of 93 ATTACHMENT 7 Page 1 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-A-KC-3188 ADAC AD70R 1036 480 139 1-A-KC-3253 ADAC AD70R 998 480 139

<< 1-A-KC-3313 >>

ADAC AD70R 1045 480 139 1-A-KC-8010 ADAC AD70R 1019 480 139 1-A-KC-8187 ADAC AD70R 1029 480 139 1-A-KC-8194 ADAC AD70R 1032 480 139 1-A-KC-8218 ADAC AD70R 991 480 139 1-A-KC-8243 ADAC.

AD70R 1038 480 139 1-A-KC-8246 ADAC AD70R 1037 480 139 1-R-CF-1744 ADAC AD70R 993 480 139 1-R-KC-0803 (a)

ADAC AD70R 1027 480 139 1-R-KC-0803 (b)

ADAC AD70R 1039 480 139 2-A-CA-4040 ADAC AD70R 1009 480 139 1-A-KC-3214 ADAC AD70R 1067 480 151 1-A-KC-8009 ADAC AD70R 1043 480 151 1-A-KC-8248 ADAC AD70R 1068 480 151 1-A-KC-8259 ADAC AD70R 1063 480 151 1-A-NV-8312 ADAC AD70R 1051 480 151 1-A-WS-8056 ADAC AD70R 1065 480 151 2-R-BB-1546 (a)

ADAC AD70R 1074 480 151 2-R-BB-1546 (b)

ADAC AD70R 990 480 151 2-R-BB-1547 (a)

ADAC AD70R 1049 480 151 2-R-BB-1547 (b)

ADAC AD70R 1048 480 151 2-R-BB-1547 (c)

ADAC AD70R 1080 480 151 2-R-CA-1650 ADAC AD70R 1073 480 151 2-R-CA-1673 ADAC AD70R 1060 480 151 2-R-ND-0407 ADAC AD70R 1083 480 151 2-R-NV-0266 ADAC AD70R 1054 480 151 1-A-KC-4228 PSCO PSA1 2420 720 259 1-A-Nl-4192 PSCO PSA1 2614 720 259 1-A-NV-3093 PSCO PSA3 3604 720 259 1-R-CF-1544 (a)

PSCO PSA3 3539 720 259 1-R-CF-1544 (b)

PSCO PSA3 3549 720 259 1-R-FW-0020 PSCO PSA3 3610 720 259

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 49 of 93 ATTACHMENT 7 Page 2 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-NC-1654 PSCO PSAlO 2217 720 259 1-R-ND-0268 PSCO PSA3 3602 720 259 1-R-NV-1866 PSCO PSAl 1068 720 259 1-R-NV-2153 PSCO PSAl 1080 720 259 1-R-RN-0335 (a)

PSCO PSA3 3135 720 259 1-R-RN-0335 (b)

PSCO PSA3 3601 720 259 1-R-RN-0345 (b)

PSCO PSA3 3782 720 259 1-R-RN-1013 (b)

PSCO PSAl 2035 720 259 1-R-SC-2080 (b)

PSCO PSA3 3608 720 259 2-A-FW-4006 PSCO PSAl 1070 720 259 2-A-Vl-3007 PSCO PSAl 2545 720 259 2-R-CF-1586 (b)

PSCO PSA3 3544 720 259 2-R-FW-0067 (b)

PSCO PSA3 3597 720 259 2-R-NC-1668 (a)

PSCO PSA3 3815 720 259 2-R-NC-1679 (b)

PSCO PSA3 3598 720 259 2-R-NC-1682 (a)

PSCO PSA3 2884 720 259 2-R-ND-1008 PSCO PS Al 2073 720 259 2-R-NS-0096 PSCO PSA3 3524 720 259 2-R-NV-1290 PSCO PSAl 2621 720 259 2-R-RN-0360 PSCO PSA3 3605 720 259 2-R-SC-2065(b)

PSCO PSAlO 2225 720 259 2-R-SM-1875 (a)

PSCO PSAl 2488 720 259 l-A-FW-4001 PSCO PS Al 3360 720 271 l-A-FW-4006 PSCO PSAl 4424 720 271 l-A-KC-4148 PSCO PSAl 3007 720 271 l-A-KC-4198 PSCO PSAl 3409 720 271 l-A-KC-4248 PSCO PSAl/2 11546 720 271 l-A-KC-4298 PSCO PSAl 3399 720 271 l-A-Nl-4189 PSCO PSAl/2 3503 720 271 l-A-Nl-4191 PSCO PSAl 2988 720 271 l-A-VY-4113 PSCO PSAl 4619 720 271 l-A-WL-3886 PSCO PSAl 3405 720 271 1-R-BB-1355 PSCO PSAl 4679 720 271 1-R-BB-1425 PSCO PSAl 3025 720 271 1-R-BB-1490 PSCO PSAl 4817 720 271

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 50 of 93 ATTACHMENT 7 Page 3 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-BB-1764 PSCO PSAl 4277 720 271 1-R-BB-1774 PSCO PSAl 4588 720 271 1-R-BB-1833 PSCO PSAl 3480 720 271 1-R-CA-1505 PSCO PSAl 3472 720 271 1-R-CA-1515 PSCO PSAl 3453 720 271 1-R-CA-1591 PSCO PSAl 3385 720 271 1-R-CF-1501 PSCO PSA35 2633 720 271 1-R-CF-1539 (b)

PSCO PSA10 3469 720 271 1-R-KC-0293 PSCO PSAl 4614 720 271 1-R-KC-1116 PSCO PSAl 4201 720 271 1-R-KC-1313 PSCO PSAl 5447 720 271 1-R-KC-1455 PSCO PSAl 3450 720 271 1-R-KC-1824 PSCO PSA3 4119 720 271 1-R-NC-1129 PSCO PSAl/2 11543 720 271 1-R-N C-1487 PSCO PSAl/2 3984 720 271 1-R-NC-1602 PSCO PSA10 3230 720 271 1-R-NC-1629 PSCO PSAl 3351 720 271 1-R-NC-1646 PSCO PSAl/2 4152 720 271 1-R-N C-1652 PSCO PSA3 4154 720 271 1-R-ND-0250 PSCO PSA3 4074 720 271 1-R-N D-0340 PSCO PSA3 4152 720 271 1-R-N D-0413 PSCO PSAl 4352 720 271 1-R-Nl-1399 PSCO PSA10 5706 720 271 1-R-Nl-2313 PSCO PSAl 4673 720 271 1-R-Nl-2317 PSCO PSAl 4417 720 271 1-R-N 1-2335 PSCO PSAl 3401 720 271 1-R-Nl-2342 PSCO PSAl 4632 720 271 1-R-N 1-2382 PSCO PSAl 3417 720 271 1-R-NS-0030 PSCO PSAl 17576 720 271 1-R-NV-1022 PSCO PSAl 4723 720 271 1-R-NV-1031 PSCO PSAl 4414 720 271 1-R-NV-1365 PSCO PSAl 3340 720 271 1-R-RN-0287 PSCO PSA35 2553 720 271 1-R-RN-1013 (a)

PSCO PSAl 3455 720 271 1-R-SA-0014 PSCO PSA3 4054 720 271

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Mark No Manf.

1-R-SA-0022 PSCO 1-R-SB-2046 PSCO 1-R-SM-1015 PSCO 1-R-SM-1020 PSCO 1-R-SM-1025 PSCO 1-R-SM-1030 PSCO 1-R-SM-1553 (a)

PSCO 1-R-SM-1566 (b)

PSCO 1-R-SM-1569 (a)

PSCO 1-R-SM-1569 (b}

PSCO 1-R-SM-1579 (a)

PSCO 1-R-SM-1579 (b)

PSCO 2-A-YC-3221 PSCO 2-R-BB-1063 PSCO 2-R-CA-0218 (a)

PSCO 2-R-CF-1000 PSCO 2-R-CF-1005 (a)

PSCO 2-R-CF-1008 (b)

PSCO 2-R-CF-1564 (b}

PSCO 2-R-CF-1586 (a)

PSCO 2-R-HR-2077 (a)

PSCO 2-R-H R-2080(b)

PSCO 2-R-HR-2082 PSCO 2-R-KC-1568 PSCO 2-R-NC-1668 (b)

PSCO 2-R-NC-1676 (a)

PSCO 2-R-NC-1678 (b)

PSCO 2-R-NC-1707 (a}

PSCO 2-R-NC-1725 PSCO 2-R-ND-0260 PSCO 2-R-ND-0365 PSCO 2-R-Nl-1860 PSCO 2-R-Nl-1863 PSCO 2-R-Nl-1867 PSCO 2-R-NV-0245 PSCO 1--~~~~~~~~~~~~~

Page 51 of 93 ATTACHMENT 7 Page 4 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Model Serial No.

(months}

(months}

PSAl 4816 720 271 PSA35 3815 720 271 PSA35 3299 720 271 PSA35 3319 720 271 PSA35 3312 720 271 PSA35 3330 720 271 PSAlO 4313 720 271 PSA35 3345 720 271 PSAlO 3455 720 271 PSAlO 3467 720 271 PSA35 2741 720 271 PSA35 2757 720 271 PSAl 4229 720 271 PS Al 2944 720 271 PSAl 4714 720 271 PSA35 2565 720 271 PSA3 6395 720 271 PSA3 6358 720 271 PSAlO 4695 720 271 PSA3 4052 720 271 PSA3 9768 720 271 PSA3 6353 720 271 PSAlO 3213 720 271 PSAl 3376 720 271 PSA3 4096 720 271 PSA3 5238 720 271 PSAl 4257 720 271 PSA3 4077 720 271 PSA35 2557 720 271 PSAl 2983 720 271 PSA3 4083 720 271 PSAl 4650 720 271 PSAl 2975 720 271 PSAl 3358 720 271 PSA3 6394 720 271

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 52 of 93 ATTACHMENT 7 Page 5 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-SA-1519 PSCO PSA3 4162 720 271 2-R-SA-1523 PSCO PSA3 4057 720 271 2-R-SM-1013 (b)

PSCO PSAlO 3215 720 271 2-R-SM-1029 PSCO PSA35 3304 720 271 2-R-SM-1035 PSCO PSA35 3298 720 271 2-R-SM-1500 PSCO PSAl 4712 720 271 2-R-SM-1583 (a)

PSCO PSAlO 3214 720 271 2-R-SM-1704 PSCO PS Al 4250 720 271 2-R-SM-1875 (b)

PSCO PS Al 4674 720 271 2-S-NR-5515 (b)

PSCO PSAl/2 3107 720 271 2-S-NR-5519 (b)

PSCO PSAl 4324 720 271 1-A-FW-3009 PSCO PSAl 7122 720 283 1-A-KC-4151 PSCO PSAl 6049 720 283 1-A-KC-4691 PSCO PSAl/2 5662 720 283 1-A-N B-3289 PSCO PSAl 6000 720 283 1-A-N R-3086 PSCO PSAl 7148 720 283 1-A-NV-3000 PSCO PSAl 8260 720 283 1-A-NV-3014 PSCO PS Al 8604 720 283 1-A-NV-3886 PSCO PSAl 8510 720 283 1-A-NV-8314 PSCO PSAl 6013 720 283 1-A-NV-8379 PSCO PSAl 9001 720 283 1-A-NV-8429 PSCO PSAl 7179 720 283 1-A-WG-8047 PSCO PSAl 7235 720 283 1-A-WG-8495 PSCO PSAl/2 5517 720 283 1-A-WL-3203 PSCO PSAl 8281 720 283 1-A-WL-3484 PSCO PSAl 7128 720 283 1-R-BB-1501 PSCO PSA3 9480 720 283 1-R-BB-1702 PSCO PSAl 6131 720 283 1-R-BB-1752 (a)

PSCO PSAl 8576 720 283 1-R-BB-1841 (a)

PSCO PSAl 6018 720 283 1-R-BB-1842 PSCO PSAl 6095 720 283 1-R-BW-1011 PSCO PSAl/4 9578 720 283 1-R-CA-0287 (a)

PSCO PSA3 8514 720 283 1-R-CA-0287 (b)

PSCO PSA3 8500 720 283 1-R-CA-0325 PSCO PSA3 8531 720 283

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 53 of 93 ATTACHMENT 7 Page 6 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-CF-1545 (a)

PSCO PSA3 8721 720 283 1-R-CF-1566 (b)

PSCO PSA3 10050 720 283 1-R-KC-0038 PSCO PSAl 8973 720 283 1-R-KC-0572 PSCO PSAl 7178 720 283 1-R-KC-0601 PSCO PS Al 6017 720 283 1-R-KF-0050 PSCO PSAl 8208 720 283 1-R-NB-0141 PSCO PS Al 7169 720 283 1-R-NC-1056 PSCO PSAl 8580 720 283 1-R-NC-1070 PSCO PSA3 8785 720 283 1-R-NC-1095 PSCO PSAl/4 8582 720 283 1-R-NC-1593 PSCO PSA35 4835 720 283 1-R-NC-1603 PSCO PSA35 4822 720 283 1-R-NC-1615(a)

PSCO PSA3 10164 720 283 1-R-NC-1615(b)

PSCO PSA3 10147 720 283 1-R-NC-1616 PSCO PSA3 8571 720 283 1-R-NC-1618(a)

PSCO PSA3 10247 720 283 1-R-N C-1618(b)

PSCO PSA3 9542 720 283 1-R-NC-1624 PSCO PSA3 8681 720 283 1-R-NC-1625(b)

PSCO PSA3 10042 720 283 1-R-NC-1626(a)

PSCO PSA3 8507 720 283 1-R-NC-1628 PSCO PSA3 8501 720 283 1-R-NC-1636 PSCO PSA3 8528 720 283 1-R-NC-1648 (a)

PSCO PSA3 10244 720 283 1-R-NC-1648 (b)

PSCO PSA3 9486 720 283 1-R-NC-1649 (a)

PSCO PSA3 8562 720 283 1-R-NC-1649 (b)

PSCO PSA3 8675 720 283 1-R-NC-1650 PSCO PSA3 8750 720 283 1-R-NC-1656 (a)

PSCO PSA3 10238 720 283 1-R-NC-1656 (b)

PSCO PSA3 8567 720 283 1-R-NC-1657 PSCO PSA3 8726 720 283 1-R-NC-2159 (a)

PSCO PSA3 9986 720 283 1-R-NC-2208 PSCO PSA3 8737 720 283 1-R-NC-2209 (a)

PSCO PSAlO 11571 720 283 1-R-ND-0076 (b)

PSCO PSAl 5187 720 283 1-R-N D-0296 PSCO PSAl 7227 720 283

SNUBBER PROGRAM PLAN

/

AD-EG-CNS-1618 Rev.002 Page 54 of 93 ATTACHMENT 7 Page 7 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-Nl-1353 PSCO PSA3 9805 720 283 1-R-Nl-2264 PSCO PSA3 8680 720 283 1-R-Nl-2315 PSCO PS Al 8179 720 283 1-R-Nl-2319 PSCO PS Al 8571 720 283 1-R-Nl-2321 PSCO PSAl 8574 720 283 1-R-Nl-2326 PSCO PS Al 8386 720 283 1-R-Nl-2327 PSCO PS Al 7925 720 283 1-R-Nl-2329 PSCO PS Al 8559 720 283 1-R-Nl-2330 PSCO PSAl 8318 720 283 1-R-Nl-2331 PSCO PS Al 7106 720 283 1-R-Nl-2341 PSCO PSAl 8022 720 283 1-R-NS-0008 PSCO PSA3 8520 720 283 1-R-NV-0015 PSCO PSAl 7151 720 283 1-R-NV-0213 PSCO PS Al 7873 720 283 1-R-NV-1002 PSCO PSAl 7816 720 283 1-R-NV-1028 PSCO PSAl 6111 720 283 1-R-NV-1188 PSCO PSA10 6267 720 283 1-R-RN-0073 (a)

PSCO PSA10 6262 720 283 1-R-RN-0139 PSCO PSA10 6266 720 283 1-R-RN-0195 PSCO PSA3 10248 720 283 1-R-RN-0843 PSCO PSA3 8597 720 283 1-R-SA-0016 PSCO PSAl 7282 720 283 1-R-SA-1529 PSCO PSA3 8768 720 283 1-R-SM-1031 PSCO PSA35 4669 720 283 1-R-SM-1034 PSCO PSA35 4810 720 283 1-R-SM-1035 PSCO PSA35 3844 720 283 1-R-SM-1549 (a)

PSCO PSA10 5100 720 283 1-R-SM-1564 (b)

PSCO PSA35 3898 720 283 1-R-SM-1570 (a)

PSCO PSA10 5998 720 283 1-R-SM-1583 (a)

PSCO PSA10 5764 720 283 1-R-SM-1713 PSCO PSAl 8951 720 283 1-R-SV-1507 PSCO PSA3 8614 720 283 1-R-SV-1509 PSCO PSA3 8722 720 283 1-R-SV-1514 PSCO PSA3 8713 720 283 1-S-NR-5017 (a)

PSCO PSAl/2 7244 720 283

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 55 of 93 ATTACHMENT 7 Page 8 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-A-FW-4001 PSCO PSAl 5782 720 283 2-A-KC-3637 PSCO PSA3 8541 720 283 2-A-NV-3765 PSCO PSAl 8028 720 283 2-A-NV-3817 PSCO PSAl 8609 720 283 2-R-BB-1003 PSCO PSAl 7189 720 283 2-R-BB-1036 (a)

PSCO PSAl 8387 720 283 2-R-BB-1036 (b)

PSCO PSAl 8557 720 283 2-R-BB-1044 PSCO PSAl 8019 720 283 2-R-BB-1062 (b)

PSCO PSAl/2 4371 720 283 2-R-BB-1086 PSCO PSA3 9214 720 283 2-R-BB-1501 PSCO PSAl 5152 720 283 2-R-BB-2180 (b)

PSCO PSA3 9774 720 283 2-R-CA-0109 PSCO PSA3 8506 720 283 2-R-CA-0218 (b)

PSCO PSAl 7161 720 283 2-R-CF-1003 PSCO PSA35 4245 720 283 2-R-CF-1005 (b)

PSCO PSA3 8740 720 283 2-R-CF-1008 (a)

PSCO PSA3 3808 720 283 2-R-CF-1011 (a)

PSCO PSA3 9992 720 283 2-R-CF-1011 (b)

PSCO PSA3 8596 720 283 2-R-CF-1526 PSCO PSA10 5059 720 283 2-R-CF-1528 PSCO PSA3 10142 720 283 2-R-CF-1546 PSCO PSA3 8805 720 283 2-R-CF-1564 (a)

PSCO PSA10 5067 720 283 2-R-CF-1584 (b)

PSCO PSA10 6192 720 283 2-R-CF-1644 PSCO PSAl/2 5443 720 283 2-R-CF-1727 (a)

PSCO PSAl 8539 720 283 2-R-CF-1727 (b)

PSCO PSAl 8235 720 283 2-R-CF-1728 (a)

PSCO PSAl 5784 720 283 2-R-CF-1728 (b)

PSCO PSAl 5967 720 283 2-R-FW-0067 (a)

PSCO PSA3 8109 720 283 2-R-FW-0089 PSCO PSA3 9498 720 283 2-R-FW-0115 PSCO PSA3 9934 720 283 2-R-H R-2067(a)

PSCO PSA3 9759 720 283 2-R-H R-2071 PSCO PSA3 8747 720 283 2-R-HR-2077 (b)

PSCO PSA3 8587 720 283

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 56 of 93 ATTACHMENT 7 Page 9 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-H R-2080(a)

PSCO PSA3 8855 720 283 2-R-KC-0196 PSCO PSA3 8211 720 283 2-R-KC-0227 (a)

PSCO PSA3 10206 720 283 2-R-KC-0227 (b)

PSCO PSA3 9488 720 283 2-R-KC-0437 PSCO PSA3 8953 720 283 2-R-NC-1038 PSCO PSAl 8075 720 283 2-R-NC-1500 PSCO PSAlO 4790 720 283 2-R-NC-1509 PSCO PSA3 10236 720 283 2-R-NC-1518 PSCO PSA3 9938 720 283 2-R-NC-1669 PSCO PSA3 9826 720 283 2-R-NC-1670 (a)

PSCO PSA3 9472 720 283 2-R-NC-1670 (b)

PSCO PSAl 7906 720 283 2-R-NC-1671 (b)

PSCO PSA3 9561 720 283 2-R-NC-1673 (a)

PSCO PSA3 8744 720 283 2-R-NC-1675 (a)

PSCO PSA3 12870 720 283 2-R-NC-1675 (b)

PSCO PSA3 10048 720 283 2-R-NC-1676 (b)

PSCO PSA3 8688 720 283 2-R-NC-1678 (a)

PSCO PSAl 5777 720 283 2-R-NC-1679 (a)

PSCO PSA3 9960 720 283 2-R-NC-1681 (a)

PSCO PSAlO 5083 720 283 2-R-NC-1684 (b)

PSCO PSAlO 6361 720 283 2-R-NC-1685 PSCO PSA3 7202 720 283 2-R-NC-1698 (a)

PSCO PSA3 8798 720 283 2-R-NC-1698 (b)

PSCO PSA3 9211 720 283 2-R-NC-1703 PSCO PSA3 6359 720 283 2-R-NC-1707 (b)

PSCO PSA3 9503 720 283 2-R-NC-1919 PSCO PSAl 8251 720 283 2-R-ND-0256 PSCO PSA3 8718 720 283 2-R-ND-0265 (a)

PSCO PSAl 8486 720 283 2-R-ND-0265 (b)

PSCO PSAl 8463 720 283 2-R-N D-0273 PSCO PSAl 9056 720 283 2-R-N D-0456 PSCO PSAl 8170 720 283 2-R-ND-0457 (b)

PSCO PS Al 8257 720 283 2-R-ND-0467 PSCO PSAl 8368 720 283 2-R-Nl-1043 PSCO PSA3 10084 720 283

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 57 of 93 ATTACHMENT 7 Page 10 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-Nl-1694 PSCO PSA3 7332 720 283 2-R-Nl-1758 (b)

PSCO PSAlO 6018 720 283 2-R-Nl-1816 (a)

PSCO PSAl 9068 720 283 2-R-Nl-1816 (b)

PSCO PSAl 8279 720 283 2-R-Nl-1850 PSCO PSAl/2 7218 720 283 2-R-Nl-1851 PSCO PSAl 8943 720 283 2-R-Nl-1855 PSCO PSAl/4 10195 720 283 2-R-N 1-1856 PSCO PSAl 5121 720 283 2-R-N 1-1859 PSCO PSAl 7333 720 283 2-R-Nl-1864 PSCO PSAl 7216 720 283 2-R-Nl-1872 PSCO PSAl 8612 720 283 2-R-NR-0015 PSCO PSAl/2 4970 720 283 2-R-NV-0323 PSCO PSAl 8937 720 283 2-R-NV-1163 PSCO PS Al 8497 720 283 2-R-NV-1164 PSCO PSAl 8213 720 283 2-R-NV-1386 PSCO PSAl 7170 720 283 2-R-NV-1687 PSCO PSAl/2 6344 720 283 2-R-NV-1987 PSCO PSAl 8391 720 283 2-R-RN-0039 PSCO PSA3 8618 720 283 2-R-RN-0079 PSCO PSA3 9639 720 283 2-R-SM-1001 PSCO PSA35 4831 720 283 2-R-SM-1005 PSCO PSA35 3802 720 283 2-R-SM-1011 PSCO PSA35 4806 720 283 2-R-SM-1013 (a)

PSCO PSAlO 6282 720 283 2-R-SM-1021 PSCO PSA35 3847 720 283 2-R-SM-1024 PSCO PSA35 4817 720 283 2-R-SM-1030 PSCO PSA35 3829 720 283 2-R-SM-1031 PSCO PSA35 3859 720 283 2-R-SM-1502 PSCO PSAl 8337 720 283 2-R-SM-1553 (b)

PSCO PSAlO 6211 720 283 2-R-SM-1569 (a)

PSCO PSAlO 5955 720 283 2-R-SM-1570 (b)

PSCO PSAlO 6197 720 283 2-R-SM-1579 (a)

PSCO PSAlO 6295 720 283 2-R-SM-1582 (a)

PSCO PSAlO 6204 720 283 2-R-SM-1583 (b)

PSCO PSAlO 6261 720 283

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 58 of 93 ATTACHMENT 7 Page 11 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-SM-1629 PSCO PSAl 8008 720 283 2-R-SM-1654 PSCO PSAl 8271 720 283 2-R-SM-1716 PSCO PSAl 8568 720 283 2-R-SV-1548 PSCO PSAl 8276 720 283 2-R-SV-1570 PSCO PSA3 8611 720 283 2-R-TE-0025 (b)

PSCO PSAl 9053 720 283 2-R-TL-2082 PSCO PSA3 9856 720 283 2-R-YC-0007 (b)

PSCO PSAl 8329 720 283 2-R-YC-0023 (a)

PSCO PSAl 7329 720 283 2-R-YC-0023 (b)

PSCO PS Al 7153 720 283 2-S-NR-5519 (a)

PSCO PSAl 9069 720 283 1-A-CA-4016 PSCO PS Al 17448 720 295 1-A-CF-4021 PSCO PSAl 4597 720 295 1-A-CF-4023 PSCO PSAl/2 13571 720 295 1-A-FW-3033 PSCO PS Al 5978 720 295 1-A-GS-3188 PSCO PSAl/2 10621 720 295 1-A-KC-3219 PSCO PS Al 5973 720 295 1-A-KC-3224 PSCO PSAl/2 13766 720 295 1-A-KC-3276 PSCO PSAl 4334 720 295 1-A-KC-3278 PSCO PSA3 4168 720 295 1-A-KC-3345 PSCO PSAl 11776 720 295 1-A-KC-3393 PSCO PSAl 8291 720 295 1-A-KC-3424 PSCO PSAl 4572 720 295 1-A-KC-3487 PSCO PSAl 5169 720 295 1-A-KC-3533 PSCO PSAl 9280 720 295 1-A-KC-3554 PSCO PSAl/2 10602 720 295 1-A-KC-3601 PSCO PSAl/2 9911 720 295 1-A-KC-4307 PSCO PSAl 7931 720 295 1-A-KC-8020 PSCO PS Al 9948 720 295 1-A-KC-8146 PSCO PSAl/2 10807 720 295 1-A-KC-8201 PSCO PSAl/2 11166 720 295 1-A-KC-8204 PSCO PSAl/2 7661 720 295 1-A-KC-8217 PSCO PSAl/2 10043 720 295 1-A-KC-8251 PSCO PSAl/2 16429 720 295 1-A-KC-8400 PSCO PSAl/2 13519 720 295

Mark No 1-A-KC-8406 1-A-KC-8549 1-A-KF-3053 1-A-NB-3179 1-A-NB-3244 1-A-NB-3246 1-A-NB-3382 1-A-N B-3458 1-A-NB-3518 1-A-NB-3670 1-A-NB-3781 1-A-NB-3789 1-A-N B-8020 1-A-NB-8056 1-A-NB-8141 1-A-NB-8156 1-A-N B-8166 1-A-NB-8183 1-A-NB-8284 1-A-NB-8402 1-A-N B-8448 1-A-NC-3054 1-A-NC-3058 1-A-NF-3009 1-A-Nl-4008 1-A-Nl-4116 1-A-Nl-4217 1-A-Nl-4370 1-A-NR-3097 1-A-NR-3222 1-A-NV-3006 1-A-NV-3008 1-A-NV-3026 1-A-NV-3036 1-A-NV-3045 SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 59 of 93 ATTACHMENT 7 Page 12 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Manf.

Model Serial No.

(months)

(months)

PSCO PSAl/2 16425 720 295 PSCO PSAl/2 13669 720 295 PSCO PSAl/2 10634 720 295 PSCO PSAl/2 13211 720 295 PSCO PSAl/2 12981 720 295 PSCO PSAl/2 11185 720 295 PSCO PSAl 9248 720 295 PSCO PSAl 9292 720 295 PSCO PSAl/2 11774 720 295 PSCO PSAl 8440 720 295 PSCO PSAl/2 14297 720 295 PSCO PSAl/2 4398 720 295 PSCO PSAl/2 10683 720 295 PSCO PSAl 9254 720 295 PSCO PSAl/2 8831 720 295 PSCO PSAl 8176 720 295 PSCO PSAl 6037 720 295 PSCO PSAl/2 13877 720 295 PSCO PSAl/2 11765 720 295 PSCO PSAl/2 12020 720 295 PSCO PSAl/2 10029 720 295 PSCO PSAl/2 14646 720 295 PSCO PSAl/2 14229 720 295 PSCO PSA3 19864 720 295 PSCO PSAl/2 10056 720 295 PSCO PSAl/2 8031 720 295 PSCO PSAl/2 14073 720 295 PSCO PSAl/2 8052 720 295 PSCO PSAl/2 4760 720 295 PSCO PSAl 8219 720 295 PSCO PSAl 12426 720 295 PSCO PSAl 8584 720 295 PSCO PSAl 6079 720 295 PSCO PSAl 12903 720 295 PSCO PSAl 12347 720 295

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 60 of 93 ATTACHMENT 7 Page 13 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-A-NV-3049 PSCO PSAl 17237 720 295 1-A-NV-3075 PSCO PSAl 9310 720 295 1-A-NV-3134 PSCO PSAl 9637 720 295 1-A-NV-3188 PSCO PSA3 9645 720 295 1-A-NV-3286 PSCO PSAl/2 10120 720 295 1-A-NV-3289 PSCO PSAl 7346 720 295 1-A-NV-3299 PSCO PSAl 8074 720 295 1-A-NV-3315 PSCO PSAl 9264 720 295 1-A-NV-3711 PSCO PSAl/2 10071 720 295 1-A-NV-3 7 45 PSCO PSAl/2 14617 720 295 1-A-NV-3751 PSCO PSAl/2 11764 720 295 1-A-NV-3802 PSCO PSAl 9029 720 295 1-A-NV-3831 PSCO PSAl/2 13221 720 295 1-A-NV-3875 PSCO PSAl/2 14857 720 295 1-A-NV-3975 PSCO PSAl/2 41243 720 295 1-A-NV-4043 PSCO PSAl/2 17404 720 295 1-A-NV-8018 PSCO PSAl 9483 720 295 1-A-NV-8096 PSCO PSAl 2891 720 295 1-A-NV-8115 PSCO PSAl 8843 720 295 1-A-NV-8123 PSCO PSAl/2 15574 720 295 1-A-NV-8125 PSCO PSAl/2 14946 720 295 1-A-NV-8132 PSCO PSAl/2 8858x 720 295 1-A-NV-8161 PSCO PSAl/2 13350 720 295 1-A-NV-8163 PSCO PSAl/2 11127 720 295 1-A-NV-8168 PSCO PSAl 8353 720 295 1-A-NV-8192 PSCO PS Al 9271 720 295 1-A-NV-8210 (a)

PSCO PSAl/2 12987 720 295 1-A-NV-8210 (b)

PSCO PSAl/2 13003 720 295 1-A-NV-8224 PSCO PSAl 9250 720 295 1-A-NV-8238 PSCO PSAl 7260 720 295 1-A-NV-8306 PSCO PSAl/2 9900 720 295 1-A-NV-8313 PSCO PSAl 12916 720 295 1-A-NV-8316 PSCO PSAl 6028 720 295 1-A-NV-8325 PSCO PSA3 3633 720 295 1-A-NV-8331 PSCO PSAl/2 16408 720 295

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 61 of 93 ATTACHMENT 7 Page 14 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-A-NV-8352 PSCO PSAl/2 10597 720 295 1-A-NV-8370 PSCO PSAl 9641 720 295 1-A-NV-8375 PSCO PSAl/2 7208 720 295 1-A-NV-8406 PSCO PSAl 12909 720 295 1-A-NV-8411 (a)

PSCO PSAl/2 15548 720 295 1-A-NV-8411 (b)

PSCO PSAl/2 10068 720 295 1-A-NV-8413 PSCO PSAl/2 16441 720 295 1-A-NV-8505 PSCO PSAl/2 18696 720 295 1-A-NV-8507 PSCO PSAl/2 7228 720 295 1-A-NV-8511 PSCO PSAl/2 14082 720 295 1-A-NV-8518 PSCO PSAl 8377 720 295 1-A-NV-8552 PSCO PSAl 6069 720 295 1-A-NV-8562 PSCO PSAl/2 13672 720 295 1-A-VB-3047 PSCO PSAl/2 16356 720 295 1-A-VB-3052 PSCO PSAl/2 10085 720 295 1-A-Vl-3055 PSCO PSAl/2 9919 720 295 1-A-Vl-4117 PSCO PSAl/2 13999 720 295 1-A-WG-3024 PSCO PSAl/2 10668 720 295 1-A-WG-3224 PSCO PSAl/2 13782 720 295 1-A-WG-3666 PSCO PSAl/2 13007 720 295 1-A-WG-3771 PSCO PS Al 7284 720 295 1-A-WG-8161 PSCO PSAl/2 15817 720 295 1-A-WG-8435 PSCO PSAl/2 6373 720 295 1-A-WG-8565 PSCO PSAl/2 15360 720 295 1-A-WG-8567 PSCO PSAl/2 11769 720 295 1-A-WG-8572 PSCO PSAl/2 12009 720 295 1-A-WG-8610 PSCO PSAl/2 13626 720 295 1-A-WG-8619 PSCO PSAl/2 13996 720 295 1-A-WG-8628 (b)

PSCO PSAl/2 13554 720 295 1-A-WG-8642 PSCO PSAl/2 13646 720 295 1-A-WG-8694 PSCO PSAl/2 12255 720 295 1-A-WL-3193 PSCO PSAl 8944 720 295 1-A-WL-3199 PSCO PSAl 9276 720 295 1-A-WL-3200 PSCO PSAl 9297 720 295 1-A-WL-3201 PSCO PSAl 17544 720 295

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 62 of 93 ATTACHMENT 7 Page 15 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-A-WL-3209 PSCO PSAl 8243 720 295 l-A-WL-3212 PSCO PSAl 9678 720 295 1-A-WL-3218 PSCO PSAl 8226 720 295 l-A-WL-3326 PSCO PSAl/2 8065 720 295 l-A-WL-3532 PSCO PSAl 9795 720 295 1-A-WL-3533 PSCO PSAl/2 11782 720 295 1-A-WL-3579 PSCO PSAl 16414 720 295 1-A-WL-3643 PSCO PSAl/2 16460 720 295 l-A-WL-3764 PSCO PSAl/2 14606 720 295 1-A-WL-3887 PSCO PSAl 8210 720 295 1-A-WL-4056 PSCO PSAl 17513 720 295 1-A-WL-8145 PSCO PSA1/2 12089 720 295 1-A-WL-8146 PSCO PSAl/2 11780 720 295 l-A-WP-3002 PSCO PSAl/2 13552 720 295 1-A-YC-3347 PSCO PSAl 17516 720 295 1-A-YC-3387 PSCO PSA1/2 92551 720 295 1-A-YC-3406 PSCO PSA1/2 6058 720 295 1-A-YM-3150 PSCO PSA1/2 13659 720 295 1-A-YM-3210 PSCO PSA1/2 13331 720 295 1-R-AS-2228 PSCO PSAl 5439 720 295 1-R-BB-1346 PSCO PSAl 12932 720 295 1-R-BB-1411 PSCO PSAl/2 11772 720 295 1-R-BB-1413 PSCO PSA1 2946 720 295 1-R-BB-1419 PSCO PSA1 9260 720 295 1-R-BB-1520 PSCO PSA1 26161 720 295 1-R-BB-1575 PSCO PSA1/2 14012 720 295 1-R-BB-1584 PSCO PSAl/2 28155 720 295 1-R-BB-1587 PSCO PSAl/2 13041 720 295 1-R-BB-1589 PSCO PSAl/2 15843 720 295 1-R-BB-1590 PSCO PSAl/2 15757 720 295 1-R-BB-1822 PSCO PSA1 9269 720 295 1-R-BB-1837 PSCO PSAl 9478 720 295 1-R-BB-2284 (a)

PSCO PSA3 9584 720 295 1-R-BB-2284 (b)

PSCO PSA3 10229 720 295 1-R-BW-1010 PSCO PSA1/4 12952 720 295

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 63 of 93 ATTACHMENT 7 Page 16 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-CA-1615 PSCO PS Al 8468 720 295 1-R-CA-1679 PSCO PSAl 2974 720 295 1-R-CA-1680 PSCO PS Al 7322 720 295 1-R-CA-1686 (a)

PSCO PSAl 6105 720 295 1-R-CA-1686 (b)

PSCO PSAl 473 720 295 1-R-CA-1704 PSCO PSAl/2 15976 720 295 1-R-CF-1502 (a)

PSCO PSAlO 9459 720 295 1-R-CF-1502 (b)

PSCO PSAlO 8155 720 295 1-R-CF-1520 PSCO PSA35 4318 720 295 1-R-CF-1539 (a)

PSCO PSAlO 18172 720 295 1-R-CF-1541 (a)

PSCO PSAlO 5049 720 295 1-R-CF-1541 (b)

PSCO PSAlO 3219 720 295 1-R-CF-1543 (b)

PSCO PSA3 8733 720 295 1-R-CF-1545 (b)

PSCO PSA3 8734 720 295 1-R-CF-1564 (a)

PSCO PSAlO 12629 720 295 1-R-CF-1564 (b)

PSCO PSAlO 5868 720 295 1-R-CF-1566 (a)

PSCO PSA3 28196 720 295 1-R-CF-1567 (a)

PSCO PSA3 8825 720 295 1-R-CF-1567 (b)

PSCO PSA3 11152 720 295 1-R-CF-1568 (b)

PSCO PSAlO 11561 720 295 1-R-CF-1591 (a)

PSCO PS Al 349 720 295 1-R-CF-1591 (b)

PSCO PSAl 390 720 295 1-R-CF-1611 PSCO PSAl/2 15819 720 295 1-R-CF-1670 (b)

PSCO PSAl 17450 720 295 1-R-CF-1733 PSCO PSAl 1088 720 295 1-R-FW-0008 (a)

PSCO PSA3 4076 720 295 1-R-FW-0008 (b)

PSCO PSA3 4048 720 295 1-R-FW-0045 PSCO PSAl 6102 720 295 1-R-FW-0056 PSCO PSA3 6408 720 295 1-R-FW-0132 (a)

PSCO PSA3 2541 720 295 1-R-FW-0132 (b)

PSCO PSA3 3531 720 295 1-R-GN-1510 PSCO PSAl 6075 720 295 1-R-HR-2026 (a)

PSCO PSA3 19936 720 295 1-R-HR-2026 (b)

PSCO PSA3 19906 720 295 1-R-HR-2045 PSCO PSA3 4174 720 295

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 64 of 93 ATTACHMENT 7 Page 17 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-H R-2065 PSCO PSA3 3533 720 295 1-R-HR-2070 PSCO PSA3 3590 720 295 1-R-HR-2075 (a)

PSCO PSA3 25194 720 295 1-R-HR-2075 (b)

PSCO PSA3 9762 720 295 1-R-HR-2076 PSCO PSA3 6657 720 295 1-R-HR-2077 PSCO PS Al 3353 720 295 1-R-HR-2078 PSCO PSA3 19868 720 295 1-R-HR-2079 PSCO PSA3 19895 720 295 1-R-HR-2080 (a)

PSCO PSA3 19970 720 295 1-R-HR-2080 (b)

PSCO PSA3 8098 720 295 1-R-HR-2081 PSCO PSAl 7799 720 295 1-R-H R-2082 PSCO PSA3 25120 720 295 1-R-HR-2083 PSCO PSA3 19782 720 295 1-R-HR-2084 (a)

PSCO PSA3 8810 720 295 1-R-HR-2084 (b)

PSCO PSA3 9957 720 295 1-R-HR-2085 PSCO PSAlO 6583 720 295 1-R-HR-2086 PSCO PSA3 8602 720 295 1-R-H R-2088 PSCO PSAlO 12060 720 295 1-R-HR-2089.

PSCO PSA3 9769 720 295 1-R-HR-2090 PSCO PSA3 11166 720 295 1-R-KC-0004 PSCO PSAl 17312 720 295 1-R-KC-0111 PSCO PSAl 4199 720 295 1-R-KC-0124 PSCO PSAl 12906 720 295 1-R-KC-0273 PSCO PSAl 9279 720 295 1-R-KC-0275 PSCO PSAl 9300 720 295 1-R-KC-0303 PSCO PSA3 3546 720 295 1-R-KC-0317 (a)

PSCO PSAl 9791 720 295 1-R-KC-0317 (b)

PSCO PSAl 9838 720 295 1-R-KC-0392 PSCO PSAlO 5038 720 295 1-R-KC-0394 PSCO PSA35 2575 720 295 1-R-KC-0398 PSCO PSA3 11142 720 295 1-R-KC-0444 PSCO PSA3 9557 720 295 1-R-KC-0458 PSCO PSA3 6386 720 295 1-R-KC-0524 PSCO PSAl 4728 720 295 1-R-KC-0606 PSCO PSAl/2 11126 720 295

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 65 of 93 ATTACHMENT 7 Page 18 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-KC-0647 PSCO PSAl/2 11130 720 295 1-R-KC-0649 PSCO PSAl/2 10054 720 295 1-R-KC-0700 PSCO PSAl 5431 720 295 1-R-KC-1030 PSCO PSAl 17556 720 295 1-R-KC-1436 PSCO PSAl/2 11559 720 295 1-R-KC-1807 PSCO PSA3 11055 720 295 1-R-KC-1808 PSCO PSA3 4157 720 295 1-R-KD-0121 PSCO PS Al 9959 720 295 1-R-KF-0031 PSCO PS Al 12382 720 295 1-R-KF-0037 PSCO PSA3 19848 720 295 1-R-KF-0056 PSCO PSAl 1098 720 295 1-R-NB-0190 PSCO PSAl/2 11122 720 295 1-R-NB-0199 PSCO PS Al 8439 720 295 1-R-N C-0043 PSCO PSAl/2

. 8851 720 295 1-R-NC-1062 PSCO PSAl 10155 720 295 1-R-NC-1064 PSCO PS Al 10138 720 295 1-R-NC-1075 PSCO PSAl 9626 720 295 1-R-NC-1622(a)

PSCO PSA3 12748 720 295 1-R-NC-1622(b)

PSCO PSA3 10212 720 295 1-R-NC-1625(a)

PSCO PSA3 12880 720 295 1-R-NC-1626(b)

PSCO PSA3 8535 720 295 1-R-NC-1631(a)

PSCO PSAl 17528 720 295 1-R-NC-1631(b)

PSCO PS Al 17536 720 295 1-R-NC-1635 PSCO PSA3 12736 720 295 1-R-NC-1651 PSCO PSAlO 6931 720 295 1-R-NC-1724 PSCO PSAl/2 11530 720 295 1-R-NC-1812 PSCO PSAl/4 12030 720 295 1-R-NC-2157 (a)

PSCO PSA3 12858 720 295 1-R-NC-2157 (b)

PSCO PSA3 12734 720 295 1-R~NC-2159 (b)

PSCO PSA3 11727 720 295 1-R-NC-2201 PSCO PSA3 10251 720 295 1-R-NC-2237 PSCO PSAl/2 9851 720 295 1-R-NC-2243 PSCO PSAl 361 720 295 1-R-ND-0076 (a)

PSCO PSAl 5149 720 295 1-R-N D-0108 PSCO PSAl 5244 720 295

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 66 of 93 ATTACHMENT 7 Page 19 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-N D-0225 PSCO PSA3 11049 720 295 1-R-ND-0299 (a)

PSCO PSA1 9668 720 295 1-R-ND-0299 (b)

PSCO PSA1 9268 720 295 1-R-N D-0328 PSCO PSA1 5990 720 295 1-R-ND-0330 PSCO PSA1 12380 720 295 1-R-ND-0378 PSCO PSA3 3528 720 295 1-R-N D-0386 PSCO PSA1 9294 720 295 1-R-N D-0405 PSCO PSA1 8252 720 295 1-R-ND-0576 PSCO PSA1 2088 720 295 1-R-N D-0622 PSCO PSA1/2 13662 720 295 1-R-N D-0624 PSCO PSA1/2 14237 720 295 1-R-ND-1005 PSCO PSA3 8045 720 295 1-R-ND-1007 PSCO PSA1 5787 720 295 1-R-ND-1027 PSCO PSA3 11708 720 295 1-R-N 1-0012 PSCO PSA1 9273 720 295 1-R-Nl-0109 PSCO PSA1 4596 720 295 1-R-Nl-0174 PSCO PSA1/2 14604 720 295 1-R-Nl-1071 PSCO PSA1/2 15940 720 295 1-R-Nl-1219 PSCO PSA35 5703 720 295 1-R-Nl-1396 (a)

PSCO PSA3 12728 720 295 1-R-Nl-1396 (b)

PSCO PSA3 12862 720 295 1-R-Nl-2325 PSCO PSA1/2 8120 720 295 1-R-N R-0022 PSCO PSA1/2 15334 720 295 1-R-NS-0031 PSCO PSA1 17302 720 295 1-R-NV-0082 PSCO PSA1 7195 720 295 1-R-NV-0275 PSCO PSA1 7335 720 295 1-R-NV-0471 PSCO PSA1/2 9888 720 295 1-R-NV-0508 PSCO PSA1 6083 720 295 1-R-NV-1012 (a)

PSCO PSA1 538 720 295 1-R-NV-1012 {b)

PSCO PSA1 540 720 295 1-R-NV-1119 PSCO PSA1 4524 720 295 1-R-NV-1309 PSCO PSA1/2 12200 720 295 1-R-NV-1564 PSCO PSA1/2 13489 720 295 1-R-NV-2155 PSCO PSA1/2 11773 720 295 1-R-NV-2157 PSCO PSA1/2 4787 720 295

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 67 of 93 ATTACHMENT 7 Page 20 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-NW-0002 PSCO PSAl/2 13834 720 295 1-R-RN-0073 (b)

PSCO PSAlO 6272 720 295 1-R-RN-0084 PSCO PSA3 19821 720 295 1-R-RN-0096 PSCO PSAlO 10888 720 295 1-R-RN-0326 PSCO PSA3 6762 720 295 1-R-RN-0345 (a)

PSCO PSA3 6357 720 295 1-R-RN-0366 PSCO PSA35 4320 720 295 1-R-RN-0367 PSCO PSA35 9707 720 295 1-R-RN-0506 (a)

PSCO PSA3 19969 720 295 1-R-RN-0506 (b)

PSCO PSA3 19935 720 295 1-R-RN-0578 PSCO PSAl/2 16349 720 295 1-R-RN-0751 (a)

PSCO PSA35 8892 720 295 1-R-RN-0751 (b)

PSCO PSA35 5766 720 295 1-R-RN-1051 PSCO PSAl 4316 720 295 1-R-RN-1074 PSCO PSA3 8738 720 295 1-R-SA-1503 PSCO PSAl 17292 720 295 1-R-SA-1530 PSCO PSAl 3471 720 295 1-R-SB-2045 PSCO PSAlO 9422 720 295 1-R-SC-2064 PSCO PSAlO 3599 720 295 1-R-SC-2068 PSCO PSA3 4687 720 295 1-R-SC-2075 (a)

PSCO PSAlO 3384 720 295 1-R-SC-2075 (b)

PSCO PSAlO 3453 720 295 1-R-SC-2076 PSCO PSA35 2649 720 295 1-R-SC-2078 PSCO PSA3 19908 720 295 1-R-SC-2079 PSCO PSA35 6891 720 295 1-R-SC-2080 (a)

PSCO PSA3 3619 720 295 1-R-SC-2082 (a)

PSCO PSAlO 3510 720 295 1-R-SC-2082 (b)

PSCO PSAlO 3488 720 295 1-R-SC-2083 PSCO PSA35 8898 720 295 1-R-SM-1000 PSCO PSA35 3811 720 295 1-R-SM-1001 PSCO PSA35 3850 720 295 1-R-SM-1004 PSCO PSA35 6505 720 295 1-R-SM-1005 PSCO PSA35 6454 720 295 1-R-SM-1009 PSCO PSA35 8516 720 295 1-R-SM-1010 PSCO PSA35 3395 720 295

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 68 of 93 ATTACHMENT 7 Page 21 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-SM-1011 PSCO PSA35 6455 720 295 1-R-SM-1014 PSCO PSA35 8855 720 295 1-R-SM-1018 PSCO PSA35 8868 720 295 1-R-SM-1021 PSCO PSA35 6464 720 295 1-R-SM-1024 PSCO PSA35 3798 720 295 1-R-SM-1537 (a)

PSCO PSAlO 4642 720 295 1-R-SM-1541 (a)

PSCO PSA35 8895 720 295 1-R-SM-1541 (b)

PSCO PSA35 8848 720 295 1-R-SM-1545 (b)

PSCO PSA35 8521 720 295 1-R-SM-1553 (b)

PSCO PSAlO 5701 720 295 1-R-SM-1555 PSCO PSA35 6458 720 295 1-R-SM-1556 (a)

PSCO PSA35 6442 720 295 1-R-SM-1556 (b)

PSCO PSA35 4834 720 295 1-R-SM-1557 (a)

PSCO PSAlO 4797 720 295 1-R-SM-1557 (b)

PSCO PSAlO 4828 720 295 1-R-SM-1560 (a)

PSCO PSA35 2638 720 295 1-R-SM-1560 (b)

PSCO PSA35 2650 720 295 1-R-SM-1568 PSCO PSA35 3823 720 295 1-R-SM-1570 (b)

PSCO PSAlO 6004 720 2~5 1-R-SM-1573 (a)

PSCO PSA35 6900 720 295 1-R-SM-1573 (b)

PSCO PSA35 5771 720 295 1-R-SM-1577 (a)

PSCO PSA35 4321 720 295 1-R-SM-1577 (b)

PSCO PSA35 4266 720 295 1-R-SM-1578 (a)

PSCO PSAlO 3249 720 295 1-R-SM-1581 PSCO PSA35 4699 720 295 1-R-SM-1582 (a)

PSCO PSAlO 4634 720 295 1-R-SM-1582 (b)

PSCO PSAlO 4648 720 295 1-R-SM-1583 (b)

PSCO PSAlO 5733 720 295 1-R-SM-2004 PSCO PSA3 111 720 295 1-R-SM-2034 (a)

PSCO PSA35 6894 720 295 1-R-SM-2034 (b)

PSCO PSA35 8879 720 295 1-R-SM-2035 (a)

PSCO PSA35 235 720 295 1-R-SM-2035 (b)

PSCO PSA35 236 720 295 1-R-SM-2036 (a)

PSCO PSA35 261 720 295 1-R-SM-2036 (b)

PSCO PSA35 239 720 295

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 69 of 93 ATTACHMENT 7 Page 22 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-SM-2037 (a)

PSCO PSA35 5746 720 295 1-R-SM-2037 (b)

PSCO PSA35 5736 720 295 1-R-SV-1516 PSCO PSA3 8674 720 295 1-R-TE-0047 PSCO PSA3 9758 720 295 1-S-NR-5002 (b)

PSCO PSAl/2 13507 720 295 1-S-NR-5002 (c)

PSCO PSAl/2 12288 720 295 1-S-NR-5002 (d)

PSCO PSAl/2 13208 720 295 1-S-N R-5007 PSCO PSAl/2 14601 720 295 1-S-N R-5011 PSCO PSAl 7342 720 295 1-S-N R-5013 PSCO PSAl/2 12063 720 295 1-S-VQ-5025 PSCO PSAl 2994 720 295 2-A-KC-4309 PSCO PSAl/2 9908 720 295 2-A-N 1-4401 PSCO PSAl/2 9912 720 295 2-A-NV-3558 PSCO PSAl/2 20498 720 295 2-A-VC-3249 PSCO PSAl 9284 720 295 2-R-BB-1023 PSCO PSAl 9949 720 295 2-R-BB-1031 (a)

PSCO PS Al 7905 720 295 2-R-BB-1031 (b)

PSCO PSAl 7217 720 295 2-R-BB-2180 (a)

PSCO PSA3 11126 720 295 2-R-CA-1676 PSCO PSAl/2 8858 720 295 2-R-CF-1559 (a)

PSCO PSAlO 6599 720 295 2-R-CF-1703 PSCO PSAl 9796 720 295 2-R-HR-2073 PSCO PSA3 19907 720 295 2-R-HR-2074 PSCO PSA3 19879 720 295 2-R-HR-2075 PSCO PSAlO 6588 720 295 2-R-HR-2079 PSCO PSA3 8499 720 295 2-R-KC-0022 PSCO PS Al 12946 720 295 2-R-KC-0023 PSCO PSAl 9783 720 295 2-R-KC-0038 PSCO PSAl 12882 720 295 2-R-KC-0276 PSCO PSA3 25098 720 295 2-R-KC-0376 PSCO PSAlO 5994 720 295 2-R-NC-1452 PSCO PSAl 8184 720 295 2-R-NC-1472 PSCO PSAl 9480 720 295 2-R-NC-1516 PSCO PSA3 10041 720 295 2-R-NC-1671 (a)

PSCO PSA3 11077 720 295

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 70 of 93 ATTACHMENT 7 Page 23 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-NC-1684 (a)

PSCO PSAlO 6216 720 295 2-R-NC-1713 PSCO PSAlO 6616 720 295 2-R-NC-1747 (a)

PSCO PSA3 12720 720 295 2-R-NC-1747 (b)

PSCO PSA3 10062 720 295 2-R-N D-0301 PSCO PSAl 9773 720 295 2-R-N 1-1631 PSCO PSAl/2 8844 720 295 2-R-Nl-1854 PSCO PSAl 4670 720 295 2-R-N 1-1873 PSCO PS Al 9291 720 295 2-R-NM-0061 (a)

PSCO PSAl/2 15535 720 295 2-R-NM-1130 PSCO PSAl/2 16461 720 295 2-R-NM-1272 PSCO PSAl/2 9889 720 295 2-R-NM-1282 PSCO PSAl/4 12031 720 295 2-R-NV-1292 PSCO PSAl 10120 720 295 2-R-NV-1424 PSCO PSAl/2 10658 720 295 2-R-NV-1456 (a)

PSCO PSAl/2 11779 720 295 2-R-NV-1891 PSCO PSAl 12497 720 295 2-R-NV-1917 (b)

PSCO PSAl/2 10154 720 295 2-R-NV-1943 PSCO PSAl 9811 720 295 2-R-RN-0006 PSCO PSAlO 8179 720 295 2-R-RN-0030 PSCO PSA3 9848 720 295 2-R-RN-0037 PSCO PSAl 8959 720 295 2-R-SA-1520 PSCO PSAl 9290 720 295 2-R-SC-2035 PSCO PSA35 6892 720 295 2-R-SC-2049 PSCO PSA3 19971 720 295 2-R-SC-2054 PSCO PSA3 19777 720 295 2-R-SC-2058 PSCO PSA35 8876 720 295 2-R-SC-2060(a)

PSCO PSA3 3592 720 295 2-R-SC-2060(b)

PSCO PSA3 19865 720 295 2-R-SC-2067 PSCO PSA35 8877 720 295 2-R-SM-1000 PSCO PSA35 5827 720 295 2-R-SM-1004 PSCO PSA35 5737 720 295 2-R-SM-1014 PSCO PSA35 6441 720 295 2-R-SM-1015 PSCO PSA35 6509 720 295 2-R-SM-1025 PSCO PSA35 5770 720 295 2-R-SM-1034 PSCO PSA35 6439 720 295

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 71 of 93 ATTACHMENT 7 Page 24 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-SM-1536 PSCO PSA35 5750 720 295 2-R-SM-1537 (a)

PSCO PSA35 5739 720 295 2-R-SM-1537 (b)

PSCO PSA35 5740 720 295 2-R-SM-1551 (a)

PSCO PSA35 5756 720 295 2-R-SM-1551 (b)

PSCO PSA35 6889 720 295 2-R-SM-1555 PSCO PSA35 5769 720 295 2-R-SM-1556 (b)

PSCO PSA35 5761 720 295 2-R-SM-1565 PSCO PSA35 5735 720 295 2-R-SM-1566 (a)

PSCO PSA10 6808 720 295 2-R-SM-1568 PSCO PSA35 5752 720 295 2-R-SM-1578 PSCO PSA35 5744 720 295 2-R-SM-1581 PSCO PSA35 5763 720 295 2-R-SM-1598 (b)

PSCO PSA35 6506 720 295 2-R-SV-1568 PSCO PSAl 12144 720 295 2-R-TE-0004 PSCO PSA1 9764 720 295 2-R-TE-0023 PSCO PSAl 9969 720 295 2-R-TE-0025 (a)

PSCO PSA1 9040 720 295 2-R-TE-0052 PSCO PSA1 11847 720 295 2-R-TE-0053 PSCO PSA1 12514 720 295 2-R-WL-1213 PSCO PSAl/2 9880 720 295 2-R-YC-0028 PSCO PSA1 9922 720 295 2-R-YC-0046 PSCO PS Al 17310 720 295 2-R-YC-0048 PSCO PSA1/2 7612 720 295 1-A-CA-4023 PSCO PSAl/2 12088 720 307 1-A-CA-4028 PSCO PSAl/2 13230 720 307 1-A-FW-4005 PSCO PSAl/2 11784 720 307 1-A-KC-3348 PSCO PSAl/2 11767 720 307 1-A-KC-3481 PSCO PSAl 17252 720 307 1-A-KC-3788 PSCO PSAl/2 11770 720 307 1-A-KC-3798 PSCO PSAl/2 13491 720 307 1-A-KC-3919 PSCO PSAl/2 11128 720 307 1-A-KC-4305 PSCO PSA1 13793 720 307 1-A-KC-4357 PSCO PSAl/2 13570 720 307 1-A-KC-4358 PSCO PSAl/2 17450 720 307 1-A-KC-4720 PSCO PSAl/2 12192 720 307

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 72 of 93 ATTACHMENT 7 Page 25 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-A-KF-3081 PSCO PSA1/2 12303 720 307 1-A-N B-3469 PSCO PSA1 12329 720 307 1-A-NB-3600 PSCO PSAl/2 12012 720 307 1-A-NB-8270 PSCO PSAl/2 12053 720 307 1-A-NB-8401 PSCO PSAl/2 13660 720 307 1-A-NB-8412 PSCO PSA1/2 11760 720 307 1-A-Nl-4111 PSCO PSAl/2 13683 720 307 1-A-N 1-4118 PSCO PSAl/2 13026 720 307 1-A-Nl-4119 PSCO PSA1/2 13231 720 307 1-A-Nl-4265 PSCO PSA1/2 13248 720 307 1-A-N 1-4296 PSCO PSA1/2 13551 720 307 1-A-Nl-4369 PSCO PSA1/2 13635 720 307 1-A-Nl-4385 PSCO PSAl/2 12261 720 307 1-A-Nl-4408 PSCO PSA1/2 11100 720 307 1-A-Nl-4410 PSCO PSAl/2 13342 720 307 1-A-NR-3108 PSCO PSA1 17245 720 307 1-A-NV-3142 PSCO PSA1/2 12250 720 307 1-A-NV-3546 PSCO PSAl/2 7206 720 307 1-A-NV-4202 PSCO PSAl/2 13268 720 307 1-A-NV-4211 PSCO PSAl/2 13680 720 307 1-A-NV-8035 PSCO PSA1/2 11160 720 307 1-A-NV-8151 PSCO PSAl/2 11535 720 307 1-A-NV-8290 (b)

PSCO PSAl/2 13502 720 307 1-A-NV-8322 PSCO PSAl/2 10064 720 307 1-A-NV-8470 PSCO PSA1/2 12254 720 307 1-A-NV-8486 PSCO PSAl/2 11112 720 307 1-A-NV-8509 PSCO PSAl/2 13580 720 307 1-A-NV-8559 PSCO PSAl/2 13048 720 307 1-A-WG-8628 (a)

PSCO PSAl/2 11534 720 307 1-A-WL-3165 PSCO PSAl/2 13614 720 307 1-A-WL-3207 PSCO PSA1 17558 720 307 1-A-WL-3216 PSCO PSA1 17322 720 307 1-A-WL-3341 PSCO PSAl/2 13576 720 307 1-A-WL-3367 PSCO PSA1 4579 720 307 1-A-WL-3992 PSCO PSA1/2 13511 720 307

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 73 of 93 ATTACHMENT 7 Page 26 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-A-WL-8051 PSCO PSAl/2 13648 720 307 1-A-YC-3392 PSCO PSAl/2 13485 720 307 1-A-YM-4004 PSCO PSAl/2 13484 720 307 1-R-AS-0142 PSCO PSAl/2 13506 720 307 1-R-BB-1492 PSCO PSAl 16786 720 307 1-R-BB-1744 PSCO PSAl 3454 720 307 1-R-BB-1841 © PSCO PSAl/2 17529 720 307 1-R-CA-0288 PSCO PSA3 19870 720 307 1-R-CA-1578 PSCO PS Al 17460 720 307 1-R-CF-1568 (a)

PSCO PSAlO 11549 720 307 1-R-CF-1612 PSCO PSAl/2 13675 720 307 1-R-CF-1670 (a)

PSCO PSAl 17447 720 307 1-R-CF-1743 PSCO PSAl 17523 720 307 1-R-KC-1303 PSCO PSAl/2 11587 720 307 1-R-KC-1371 (a)

PSCO PSAl/2 11123 720 307 1-R-KC-1371 (b)

PSCO PSAl/2 12043 720 307 1-R-KC-1819 PSCO PS Al 12422 720 307 1-R-NC-1041 PSCO PSAlO 9491 720 307 1-R-NC-1063 PSCO PSAl 17052 720 307 1-R-NC-1071 PSCO PSA3 15940 720 307 1-R-NC-1078 PSCO PSAl 9471 720 307 1-R-NC-1488 PSCO PSAl/2 13011 720 307 1-R-NC-1594 PSCO PSAlO 11979 720 307 1-R-NC-1597(a)

PSCO PSAlO 12062 720 307 1-R-NC-1597(b)

PSCO PSAlO 9494 720 307 1-R-NC-1601 PSCO PSAlO 12069 720 307 1-R-NC-1604 PSCO PSAlO 11550 720 307 1-R-NC-1607 PSCO PSA35 8541 720 307 1-R-NC-1609 PSCO PSAlO 11545 720 307 1-R-NC-1611(a)

PSCO PSAlO 9503 720 307 1-R-NC-1611(b)

PSCO PSAlO 9484 720 307 1-R-NC-1617 PSCO PSAl 17514 720 307 1-R-NC-1619 PSCO PSA3 16034 720 307 1-R-NC-1620(a)

PSCO PSA3 16036 720 307 1-R-NC-1620(b)

PSCO PSA3 16145 720 307

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 74 of 93 ATTACHMENT 7 Page 27 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-NC-1621(a)

PSCO PSA3 16035 720 307 1-R-NC-1621(b)

PSCO PSA3 15938 720 307 1-R-NC-1623 PSCO PSA3 15936 720 307 1-R-NC-1637 PSCO PSA3 15934 720 307 1-R-NC-1639 PSCO PSA3 16033 720 307 1-R-NC-1644 PSCO PSAl/2 13833 720 307 1-R-NC-1647 PSCO PSAl/2 13812 720 307 1-R-NC-1653 PSCO PSAlO 9492 720 307 1-R-NC-1691 PSCO PSAl/2 13893 720 307 1-R-NC-1732 PSCO PSAl/2 11549 720 307 1-R-NC-1767 PSCO PSA1/2 11550 720 307 1-R-NC-1805 (a)

PSCO PSAl 17055 720 307 1-R-NC-1805 (b)

PSCO PSA1 13778 720 307 1-R-NC-2209 (b)

PSCO PSAlO 11543 720 307 1-R-ND-0397 (b)

PSCO PSAl 17343 720 307 1-R-N D-0442 PSCO PSAl/2 11165 720 307 1-R-N 0-0584 PSCO PSA1 17291 720 307 1-R-Nl-1062 (a)

PSCO PSAl/2 15834 720 307 1-R-Nl-1062 (b)

PSCO PSAl/2 11540 720 307 1-R-N 1-1101 PSCO PSAl/2 13737 720 307 1-R-Nl-2311 PSCO PSAlO 9456 720 307 1-R-Nl-2322 PSCO PSAl/2 13681 720 307 1-R-Nl-2323 PSCO PSAl/2 13684 720 307 1-R-Nl-2333 PSCO PSAl 17469 720 307 1-R-Nl-2334 PSCO PSAl/2 12189 720 307 1-R-Nl-2339 PSCO PSA1 17300 720 307 1-R-Nl-2381 PSCO PSAl/2 14684 720 307 1-R-N 1-2403 PSCO PSAl/2 13763 720 307 1-R-NM-1083 PSCO PSAl/2 11586 720 307 1-R-NV-0274 (a)

PSCO PSAl/2 13880 720 307 1-R-NV-1295 PSCO PSAl/2 13872 720 307 1-R-NV-1367 PSCO PSAl 13863 720 307 1-R-NV-1523 PSCO PSAl/2 13814 720 307 1-R-NV-1736 PSCO PSA1 16794 720 307 1-R-NV-1918 PSCO PSAl/2 11545 720 307

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 75 of 93 ATTACHMENT 7 Page 28 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-NV-1932 (a)

PSCO PSAl 13744 720 307 1-R-NV-1932 (b)

PSCO PSAl 17244 720 307 1-R-NV-2144 PSCO PSAl/2 12055 720 307 1-R-RN-0603 PSCO PSAl 17565 720 307 1-R-SM-1536 PSCO PSA35 8509 720 307 1-R-SM-1537 (b)

PSCO PSAlO 5746 720 307 1-R-SM-1542 (a)

PSCO PSAlO 12631 720 307 1-R-SM-1545 (a)

PSCO PSA35 8508 720 307 1-R-SM-1564 (a)

PSCO PSA35 4224 720 307 1-R-SM-2031 PSCO PSAlOO 1217 720 307 1-R-TE-0023 PSCO PSA3 19925 720 307 1-R-WL-1265 PSCO PSAl/2 13858 720 307 1-S-NR-5016 PSCO PSAl/2 13024 720 307 1-S-NR-5017 (b)

PSCO PSAl/2 13891 720 307 1-S-VQ-5003 PSCO PSA3 19911 720 307 2-A-FW-4005 PSCO PSAl/2 13033 720 307 2-A-KC-3313 PSCO PSAl/2 13558 720 307 2-A-KC-4202 PSCO PSAl/2 11563 720 307 2-A-NV-3477 PSCO PSAl/2 14188 720 307 2-A-NV-3621 PSCO PSAl/2 12214 720 307 2-A-NV-3674 PSCO PSAl/2 13754 720 307 2-A-NV-3827 PSCO PSAl/2 15756 720 307 2-A-VC-3015 PSCO PSAl/2 10686 720 307 2-A-VC-3036 PSCO PSAl 17328 720 307 2-A-VC-3093 PSCO PSAl/2 13679 720 307 2-A-VC-3120 PSCO PSAl/2 12983 720 307 2-R-BB-1018 PSCO PSAl/2 11758 720 307 2-R-BB-1098 PSCO PSAl 9255 720 307 2-R-BB-1513 PSCO PSA3 19917 720 307 2-R-BB-1518 PSCO PSAl/2 11106 720 307 2-R-BB-2292 PSCO PSA3 19963 720 307 2-R-CA-0098 PSCO PSAl/2 12034 720 307 2-R-CA-1527 (a)

PSCO PSAl 17452 720 307 2-R-CA-1527 (b)

PSCO PSAl 17476 720 307 2-R-CA-1532 PSCO PSAl/2 11162 720 307

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 76 of 93 ATTACHMENT 7 Page 29 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-CA-1590 PSCO PSA3 19927 720 307 2-R-CA-1691 PSCO PSAl/2 12260 720 307 2-R-CF-1544 PSCO PSAlO 11980 720 307 2-R-CF-1559 (b)

PSCO PSAlO 10887 720 307 2-R-CF-1581 (a)

PSCO PSAlO 12015 720 307 2-R-CF-1581 (b)

PSCO PSAlO 10890 720 307 2-R-CF-1587 PSCO PSAlO 11993 720 307 2-R-CF-1593 PSCO PSAlO 11934 720 307 2-R-CF-1662 PSCO PSAl/2 12007 720 307 2-R-CF-1675 PSCO PSA3 19975 720 307 2-R-CF-1721 PSCO PSA3 19964 720 307 2-R-CF-1722 PSCO PSAl/2 12190 720 307 2-R-CF-1723 PSCO PS Al 532 720 307 2-R-FW-0019 (a)

PSCO PSAlO 11962 720 307 2-R-FW-0019 (b)

PSCO PSAlO 11978 720 307 2-R-HR-2047 PSCO PSA3 19787 720 307 2-R-H R-2066 PSCO PSAlO 11578 720 307 2-R-HR-2067(b)

PSCO PSA3 19977 720 307 2-R-H R-2076 PSCO PSAlO 11573 720 307 2-R-HR-2078 PSCO PSAlO 11569 720 307 2-R-KC-0019 PSCO PSAlO 11998 720 307 2-R-KC-0086 PSCO PSA3 19951 720 307 2-R-KC-0297 PSCO PSAl 17551 720 307 2-R-KC-0415 PSCO PS Al 17297 720 307 2-R-KC-0420 PSCO PSA3 19959 720 307 2-R-KC-0435 PSCO PSAlO 12076 720 307 2-R-KC-0438 PSCO PSAlO 11544 720 307 2-R-N B-0094 PSCO PSAl/2 13479 720 307 2-R-NB-0127 PSCO PSAl/2 14222 720 307 2-R-NC-0002 (a)

PSCO PSAl/2 13049 720 307 2-R-NC-1440 PSCO PSAl/2 13333 720 307 2-R-NC-1667 PSCO PSAlO 9497 720 307 2-R-NC-1672 PSCO PSAl 17464 720 307 2-R-NC-1673 (b)

PSCO PSA3 19905 720 307 2-R-NC-1674 PSCO PSAlO 9493 720 307

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 77 of 93 ATTACHMENT 7 Page 30 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-NC-1681 (b)

PSCO PSA10 9406 720 307 2-R-NC-1682 (b)

PSCO PSA3 19949 720 307 2-R-NC-1692 PSCO PSA3 19940 720 307 2-R-NC-1702 PSCO PSA3 19881 720 307 2-R-NC-1706 PSCO PSA3 19937 720 307 2-R-NC-1709 PSCO PSA10 11534 720 307 2-R-NC-1716 PSCO PSA10 11972 720 307 2-R-N C-17 43 PSCO PSA1/2 13882 720 307 2-R-N C-1921 PSCO PSA1/2 12016 720 307 2-R-N C-1925 PSCO PSA1/2 11617 720 307 2-R-NC-1931 PSCO PSA1/2 11129 720 307 2-R-ND-0159 PSCO PSA3 19866 720 307 2-R-ND-0259 PSCO PSA3 19972 720 307 2-R-ND-0263 PSCO PSA3 19946 720 307 2-R-ND-0270 PSCO PSA1 17456 720 307 2-R-ND-0325 PSCO PSA1 17449 720 307 2-R-ND-0383 (a)

PSCO PSA1/2 13534 720 307 2-R-ND-0383 (b)

PSCO PSA1/2 13612 720 307 2-R-ND-1017 PSCO PSA1 17470 720 307 2-R-N 1-0108 PSCO PSA1/2 13000 720 307 2-R-N 1-0112 PSCO PSA1/2 13516 720 307 2-R-N 1-1058 PSCO PSA1/2 13498 720 307 2-R-Nl-1115 PSCO PSA1/2 12998 720 307 2-R-Nl-1758 (a)

PSCO PSA10 9489 720 307 2-R-Nl-1865 PSCO PSA1/2 13645 720 307 2-R-NM-0061 (b)

PSCO PSA1/2 13030 720 307 2-R-NM-1193 PSCO PSA1/2 13757 720 307 2-R-N M-1343 PSCO PSA1/2 12083 720 307 2-R-N R-0011 PSCO PSA1/2 11565 720 307 2-R-NV-1114 PSCO PSA1/2 11183 720 307 2-R-NV-1115 PSCO PSA1/2 12262 720 307 2-R-NV-1456 (b)

PSCO PSA1/2 13671 720 307 2-R-NV-1838 PSCO PSA1/2 11620 720 307 2-R-NV-1899 PSCO PSA1/2 11761 720 307 2-R-NV-1917 (a)

PSCO PSA1/2 8008 720 307

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 78 of 93 ATTACHMENT 7 Page 31 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-NV-1918 PSCO PSAl/2 13320 720 307 2-R-NV-1945 PSCO PSAl 13665 720 307 2-R-NV-2052 PSCO PSA3 19960 720 307 2-R-RN-0187 (a)

PSCO PSA3 19856 720 307 2-R-RN-0187 (b)

PSCO PSA3 19955 720 307 2-R-RN-0190 (a)

PSCO PSA3 19875 720 307 2-R-RN-0190 (b)

PSCO PSA3 19933 720 307 2-R-RN-0208 PSCO PSA3 19888 720 307 2-R-SA-0020 (a)

PSCO PSAl/2 11622 720 307 2-R-SA-0020 (b)

PSCO PSAl/2 13666 720 307 2-R-SC-2033(a)

PSCO PSAlO 11566 720 307 2-R-SC-2033(b)

PSCO PSAlO 10930 720 307 2-R-SC-2038 PSCO PSAlO 6571 720 307 2-R-SC-2065(a)

PSCO PSAlO 11551 720 307 2-R-SM-1003 (a)

PSCO PSAlO 11977 720 307 2-R-SM-1003 (b)

PSCO PSAlO 11974 720 307 2-R-SM-1020 PSCO PSA35 8518 720 307 2-R-SM-1023 (a)

PSCO PSAlO 11576 720 307 2-R-SM-1023 (b)

PSCO PSAlO 11557 720 307 2-R-SM-1033 (a)

PSCO PSAlO 12026 720 307 2-R-SM-1033 (b)

PSCO PSAlO 12029 720 307 2-R-SM-1549 (a)

PSCO PSAlO 11976 720 307 2-R-SM-1549 (b)

PSCO PSAlO 11951 720 307 2-R-SM-1553 (a)

PSCO PSAlO 11540 720 307 2-R-SM-1557 (a)

PSCO PSAlO 12072 720 307 2-R-SM-1557 (b)

PSCO PSAlO 12056 720 307 2-R-SM-1566 (b)

PSCO PSAlO 11968 720 307 2-R-SM-1570 (a)

PSCO PSAlO 11541 720 307 2-R-SM-1579 (b)

PSCO PSAlO 12033 720 307 2-R-SM-1582 (b)

PSCO PSAlO 12070 720 307 2-R-SM-1604 (a)

PSCO PSA35 8530 720 307 2-R-SM-1712 PSCO PSAl 17288 720 307 2-R-SV-1550 PSCO PSA3 19882 720 307 2-R-TL-2086 PSCO PSAl 17465 720 307 2-R-WL-1192 PSCO PSAl/2 13303 720 307

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 79 of 93 ATTACHMENT 7 Page 32 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-YC-0045 PSCO PSAl/2 10140 720 307 2-R-YC-0068 (a)

PSCO PSAl/2 13014 720 307 2-S-N R-5508 PSCO PSAl/2 13564 720 307 2-S-N R-5523 PSCO PSAl/2 13493 720 307 2-S-NR-5524 (b)

PSCO PSAl/2 11778 720 307 1-A-KC-4122 PSCO PSAl/2 15532 720 319 1-A-KC-4189 PSCO PSAl/2 15313 720 319 1-A-KC-4219 PSCO PSAl/2 15551 720 319 1-A-KC-4299 PSCO PSAl/2 14897 720 319 1-A-KC-4885 PSCO PSAl/2 14257 720 319 1-A-KC-4899 PSCO PSAl/2 14637 720 319 1-A-KC-4955 PSCO PSAl/2 15594 720 319 1-A-KC-8227 PSCO PSAl/2 15743 720 319 1-A-NB-8035 PSCO PSAl/2 14371 720 319 1-A-NB-8098 PSCO PSAl/2 14891 720 319 1-A-NB-8185 PSCO PSAl/2 14020 720 319 1-A-Nl-4251 PSCO PSAl/2 13990 720 319 1-A-Nl-4252 PSCO PSAl/2 14856 720 319 1-A-N 1-4253 PSCO PSAl/2 15276 720 319 1-A-N 1-4409 PSCO PSAl/2 15277 720 319 1-A-N R-3092 PSCO PSAl/2 15581 720 319 1-A-NV-8055 PSCO PSAl/2 14327 720 319 1-A-NV-8259 PSCO PSAl/2 14267 720 319 1-A-NV-8290 (a)

PSCO PSAl/2 15595 720 319 1-A-NV-8347 PSCO PSAl/2 14296 720 319 1-A-NV-8349 PSCO PSAl/2 16373 720 319 1-A-NV-8353 PSCO PSAl/2 15592 720 319 1-A-NV-8443 PSCO PSAl/2 14225 720 319 1-A-NV-8557 PSCO PSAl/2 14191 720 319 1-A-WG-3357 PSCO PSAl/2 15696 720 319 1-A-WG-3635 PSCO PSAl/2 15571 720 319 1-A-WG-3665 PSCO PSAl/2 13997 720 319 1-A-WL-3556 PSCO PSAl/2 14000 720 319 1-A-WL-3597 PSCO PSAl/2 14062 720 319 1-A-YC-3410 PSCO PSAl/2 15330 720 319

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 80 of 93 ATTACHMENT 7 Page 33 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-AS-0138 PSCO PSAl/2 13998 720 319 1-R-BB-1579 PSCO PSAl/2 15305 720 319 1-R-BB-1742 PSCO PSAl/2 15704 720 319 1-R-BB-1767 PSCO PSAl/2 14402 720 319 1-R-BB-1783 PSCO PSAl/2 14398 720 319 1-R-BW-1008 PSCO PSAl/4 34548 720 319 1-R-CA-1601 PSCO PSAl/2 7259 720 319 1-R-CF-1022 PSCO PSAlO 12649 720 319 1-R-CF-1728 PSCO PSAl/2 14400 720 319 1-R-CF-1731 PSCO PSAl/2 14399 720 319 1-R-CF-1737 PSCO PSAl/2 15682 720 319 1-R-NC-1052 PSCO PSAl/2 15575 720 319 1-R-NC-1093 PSCO PSAl/2 15341 720 319 1-R-NC-1192 PSCO PSAl/2 14265 720 319 1-R-NC-1645 PSCO PSAl/2 15812 720 319 1-R-N D-0618 PSCO PSAl/2 14284 720 319 1-R-N D-0619 PSCO PSAl/2 14707 720 319 1-R-Nl-2019 PSCO PSAl/2 15772 720 319 1-R-Nl-2401 PSCO PSAl/2 15283 720 319 1-R-Nl-2406 PSCO PSAl/2 15272 720 319 1-R-N M-1081 PSCO PSAl/2 14888 720 319 1-R-NM-1305 PSCO PSAl/2 14889 720 319 1-R-NS-0102 PSCO PSAl/2 20494 720 319 1-R-NV-1283 PSCO PSAl/2 15774 720 319 1-R-NV-1579 PSCO PSAl/2 14894 720 319 1-R-NV-1629 PSCO PSAl/2 15593 720 319 1-R-NV-2071 PSCO PSAl/2 15584 720 319 1-R-NV-2143 PSCO PSAl/2 15687 720 319 1-R-SM-1029 PSCO PSA35 8860 720 319 1-R-SM-1038 PSCO PSA35 8864 720 319 1-R-SM-1550 PSCO PSA35 9687 720 319 1-R-SM-1551 (b)

PSCO PSA35 8867 720 319 1-R-SM-1565 PSCO PSA35 9266 720 319 1-R-SM-1586 (a)

PSCO PSA35 8869 720 319 1-R-SM-1586 (b)

PSCO PSA35 8900 720 319

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 81 of 93 ATTACHMENT 7 Page 34 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-WL-1112 PSCO PSAl/2 15739 720 319 1-S-NR-5002 (a)

PSCO PSAl/2 15589 720 319 2-A-CA-4013 PSCO PSAl/2 15357 720 319 2-A-KC-4167 PSCO PSAl/2 14893 720 319 2-A-KC-4312 PSCO PSAl/2 15552 720 319 2-A-N 1-4324 PSCO PSAl/2 15801 720 319 2-A-NV-3387 PSCO PSAl/2 14077 720 319 2-A-NV-3629 PSCO PSAl/2 15825 720 319 2-A-YC-3080 PSCO PSAl/2 15528 720 319 2-R-BB-1005 PSCO PSAl/2 14807 720 319 2-R-BB-1047 PSCO PSAl/2 15531 720 319 2-R-BB-1062 (a)

PSCO PSAl/2 14232 720 319 2-R-BB-1522 PSCO PSAl/2 16383 720 319 2-R-CA-1688 PSCO PSA3 25104 720 319 2-R-CF-1006 PSCO PSA35 9665 720 319 2-R-CF-1009 PSCO PSA35 9706 720 319 2-R-CF-1541 PSCO PSA35 8878 720 319 2-R-CF-1605 (a)

PSCO PSA3 25132 720 319 2-R-CF-1647 PSCO PSAl/2 14176 720 319 2-R-HR-2072 PSCO PSA3 25189 720 319 2-R-KC-0467 PSCO PSAl/2 15765 720 319 2-R-KC-0484 PSCO PSAl/2 14705 720 319 2-R-KC-1550 PSCO PSAl/2 14206 720 319 2-R-KC-1782 PSCO PSAl/2 15826 720 319 2-R-KC-1788 PSCO PSAl/2 15705 720 319 2-R-NC-0002 (b)

PSCO PSAl/2 15695 720 319 2-R-NC-1700 (a)

PSCO PSAl/2 13994 720 319 2-R-NC-1700 (b)

PSCO PSAl/2 15586 720 319 2-R-NC-1704 PSCO PSAlO 12640 720 319 2-R-NC-1711 PSCO PSA35 8859 720 319 2-R-NC-1715 PSCO PSA35 9705 720 319 2-R-NC-1721 PSCO PSA35 8865 720 319 2-R-ND-0047 PSCO PSA3 25222 720 319 2-R-ND-0440 PSCO PSAl/2 16384 720 319 2-R-Nl-1054 PSCO PSA3 25086 720 319

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 82 of 93 ATTACHMENT 7 Page 35 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-N 1-1585 PSCO PSAl/2 14226 720 319 2-R-Nl-1626 PSCO PSAl/2 15560 720 319 2-R-Nl-1627 PSCO PSAl/2 16375 720 319 2-R-N 1-1629 PSCO PSAl/2 14681 720 319 2-R-N 1-1692 PSCO PSA35 8874 720 319 2-R-N 1-1858 PSCO PSAl/2 15759 720 319 2-R-Nl-1862 PSCO PSAl/2 16346 720 319 2-R-Nl-1868 PSCO PSAl/2 15780 720 319 2-R-Nl-1869 PSCO PSAl/2 15708 720 319 2-R-Nl-1871 PSCO PSAl/2 15545 720 319 2-R-N M-1129 PSCO PSAl/2 15800 720 319 2-R-NM-1158 (b)

PSCO PSAl/2 14162 720 319 2-R-NR-0031 (a)

PSCO PSAl/2 16381 720 319 2-R-NR-0031 (b)

PSCO PSAl/2 16449 720 319 2-R-NV-0243 (a)

PSCO PSAl/2 15778 720 319 2-R-NV-0328 PSCO PSAl/2 15755 720 319 2-R-NV-0369 PSCO PSAl/2 14243 720 319 2-R-NV-1837 PSCO PSAl/2 14952 720 319 2-R-NV-1889 PSCO PSAl/2 14070 720 319 2-R-NV-1990 PSCO PSAl/2 15807 720 319 2-R-NV-2034 PSCO PSAl/2 15565 720 319 2-R-RN-0014 PSCO PSA35 9704 720 319 2-R-SB-2042 PSCO PSA35 8888 720 319 2-R-SM-1009 PSCO PSA35 8889 720 319 2-R-SM-1010 PSCO PSA35 8904 720 319 2-R-SM-1018 PSCO PSA35 8849 720 319 2-R-SM-1038 PSCO PSA35 8873 720 319 2-R-SM-1540 PSCO PSA35 8899 720 319 2-R-SM-1541 (a)

PSCO PSA35 9667 720 319 2-R-SM-1541 (b)

PSCO PSA35 8890 720 319 2-R-SM-1550 PSCO PSA35 8902 720 319 2-R-SM-1564 (a)

PSCO PSA35 9682 720 319 2-R-SM-1564 (b)

PSCO PSA35 9684 720 319 2-R-SM-1569 (b)

PSCO PSA35 9724 720 319 2-R-SM-1577 {a)

PSCO PSA35 9715 720 319

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 83 of 93 ATTACHMENT 7 Page 36 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-SM-1577 (b)

PSCO PSA35 9701 720 319 2-R-SM-1598 (a)

PSCO PSA35 8907 720 319 2-R-SM-1604 (b)

PSCO PSA35 8871 720 319 2-R-SM-2002 PSCO PSA35 323 720 319 2-R-YC-0068 (b)

PSCO PSAl/2 14213 720 319 2-S-NR-5515 (a)

PSCO PSAl/2 15727 720 319 1-A-Nl-4258 PSCO PSAl/2 17406 720 331 1-A-Nl-4378 PSCO PSAl/2 17603 720 331 1-R-CF-1726 PSCO PSAl/2 17612 720 331 1-R-NC-0042 PSCO PSAl/2 17611 720 331 1-R-NM-1405 PSCO PSAl/4 35519 720 331 1-R-NV-0274 (b)

PSCO PSAl/2 17607 720 331 2-A-NV-3679 PSCO PSAl/2 17426 720 331 2-R-CA-0132 PSCO PSAl/2 17610 720 331 2-R-CA-0206 PSCO PSAl/2 17396 720 331 2-R-KC-0553 PSCO PSAl/2 17605 720 331 2-R-NC-0005 PSCO PSAl/2 17499 720 331 2-R-NC-1109 PSCO PSAl/2 17395 720 331 2-R-NC-1687 PSCO PSA3 28169 720 331 2-R-NC-1688 PSCO PSA3 28190 720 331 2-R-NC-1690 (a)

PSCO PSA3 28180 720 331 2-R-NC-1690 (b)

PSCO PSA3 28166 720 331 2-R-NC-1691 (a)

PSCO PSAl/2 17431 720 331 2-R-NC-1691 (b)

PSCO PSAl/2 18447 720 331 2-R-NC-1693 PSCO PSA3 28152 720 331 2-R-NC-1696 PSCO PSA3 28187 720 331 2-R-NC-1699 (a)

PSCO PSA3 28147 720 331 2-R-NC-1699 (b)

PSCO PSA3 28144 720 331 2-R-N D-1022 PSCO PSAl/2 17446 720 331 2-R-N D-1023 PSCO PSAl/2 17438 720 331 2-R-Nl-1630 PSCO PSAl/2 17427 720 331 2-R-Nl-1633 PSCO PSAl/2 10628 720 331 2-R-Nl-1826 PSCO PSAl/2 17442 720 331 2-R-Nl-1874 PSCO PSAl/2 17422 720 331 2-R-NM-1262 PSCO PSAl/2 18455 720 331

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev.002 Page 84 of 93 ATTACHMENT 7 Page 37 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 2-R-NM-1379 PSCO PSAl/2 17493 720 331 2-R-NV-0243 (b)

PSCO PSAl/2 17609 720 331 2-R-NV-1556 PSCO PSAl/2 17503 720 331 2-R-NV-1922 PSCO PSA1/2 18454 720 331 2-R-NV-2033 PSCO PSA1/2 17397 720 331 2-R-SA-0018 PSCO PSAl/2 17606 720 331 2-R-SM-2025 PSCO PSAlOO 2741 720 331 2-R-SM-2029 PSCO PSAlOO 128 720 331 2-R-YC-0042 PSCO PSAl/2 17421 720 331 1-R-CF-1519 PSCO PSA35 12440 720 343 1-R-CF-1705 PSCO PSA1 724 720 343 2-R-CA-1675 PSCO PSA1 723 720 343 2-R-CF-1522 PSCO PSA35 12439 720 343 2-R-CF-1724 PSCO PSA1 805 720 343 2-R-NC-1846 PSCO PSAl 816 720 343 2-R-NV-1186 PSCO PSA1 808 720 343 2-R-NV-1187 PSCO PSA1 809 720 343 2-R-NV-1188 PSCO PSA1 818 720 343 2-R-NV-1192 PSCO PSA1 727 720 343 2-R-SM-2033 PSCO PSAlOO 181 720 343 1-R-BB-1709 PSCO PSA1 365 720 355 2-R-CA-1677 PSCO PSAl/2 17495 720 355 1-A-KC-4887 PSCO PSAl/2 20335 720 367 1-A-Nl-4097 PSCO PSA1/2 20336 720 367 1-R-BW-1001 PSCO PSA1/4 37708 720 367 2-R-NC-1923 PSCO PSA1/2 13685 720 367 2-R-Nl-1852 PSCO PSA1/4 37707 720 367 2-R-CF-1605 (b)

PSCO PSA3 6393 720 379 2-R-SM-2021 PSCO PSAlOO 189 720 379 2-R-CA-1524 PSCO PSA1/2 20489 720 403 2-R-CA-1672 PSCO PSA1/2 20491 720 403 1-R-NV-1735 PSCO PSA1 12828 720 415 1-R-SM-1551 (a)

PSCO PSA35 13037 720 415 2-R-SM-1556 (a)

PSCO PSA35 13038 720 415 1-R-NV-0004 PSCO PSAl 26143 720 427

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 85 of 93 ATTACHMENT 7 Page 38 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-BB-1353 PSCO PSAl/2 20808 720 451 1-R-BB-1485 PSCO PSAl/2 20856 720 451 1-R-SM-1013 (a)

PSCO PSAlO 18171 720 451 1-R-SM-1013 (b)

PSCO PSAlO 18218 720 451 1-R-SM-1539 PSCO PSA35 13132 720 451 1-R-SM-1566 (a)

PSCO PSA35 13133 720 451 1-R-BB-1423 PSCO PSAl 941 720 463 1-R-BB-1487 PSCO PSAl/2 20809 720 463 1-R-BB-1704 PSCO PSAl/2 20807 720 463 1-R-BB-1707 PSCO PSAl/2 20806 720 463 1-R-BB-1752 (b)

PSCO PSAl/2 20802 720 463 1-R-WL-1463 PSCO PSAl/2 20803 720 463 2-R-NC-1724 PSCO PSAlO 18170 720 463 2-R-NV-1074 PSCO PSAl/2 20805 720 463 1-R-BB-1350 PSCO PSAl/2 20863 720 487 1-R-BB-1829 PSCO PSAl/2 20858 720 487 1-R-BB-1830 PSCO PSAl/2 20860 720 487 1-R-BB-1841 (b)

PSCO PSAl 20862 720 487 1-R-CF-1016 PSCO PSAlO 18214 720 487 1-R-CF-1019 PSCO PSAlO 18215 720 487 1-R-CF-1025 PSCO PSAlO 18217 720 487 1-R-NC-2302 PSCO PSAl/2 20861 720 487 1-R-SM-1003 (a)

PSCO PSAlO 18216 720 487 1-R-SM-1003 (b)

PSCO PSAlO 18219 720 487 1-R-SM-1023 (a)

PSCO PSAlO 18211 720 487 1-R-SM-1023 (b)

PSCO PSAlO 18212 720 487 1-R-SM-1033 (a)

PSCO PSAlO 18222 720 487 1-R-SM-1033 (b)

PSCO PSAlO 18223 720 487 2-R-CF-1725 PSCO PSAl 40034 720 511 1-A-KC-3353 PSCO PSAl/2 41239 720 523 1-A-KC-4930 PSCO PSAl/2 41240 720 523 1-R-ND-0397 (a)

PSCO PSAl 40265 720 523 1-R-ND-1191 PSCO PSAl 40264 720 523 2-R-NM-1158 (a)

PSCO PSAl/2 41242 720 523 1-R-CF-1562 (a)

PSCO PSAlO 41277 720 535

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 86 of 93 ATTACHMENT 7 Page 39 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-CF-1562 (b)

PSCO PSAlO 41402 720 535 1-R-CF-1681 PSCO PSAl 41713 720 535 1-R-CF-1805 PSCO PS Al 41752 720 535 1-R-SM-1542 (b)

PSCO PSAlO 41403 720 535 1-R-SM-1549 (b)

PSCO PSAlO 41386 720 535 1-R-SM-1578 (b)

PSCO PSAlO 41385 720 535 2-R-CF-1584 (a)

PSCO PSAlO 41278 720 535 2-R-NC-1717 PSCO PSAlO 41400 720 535 2-R-NM-1079 PSCO PSAl 41425 720 535 2-R-RN-0036 PSCO PSAl 41705 720 535 2-R-SA-1504 PSCO PSAl 41706 720 535 1-A-NV-8475 PSCO PSAl/2 41789 720 547 1-R-BB-1573 PSCO PSAl/2 41791 720 547 1-R-NC-2227 PSCO PSAl/2 41790 720 547 1-R-SM-1680 PSCO PSAl 41708 720 547 1-R-CF-1543 (a)

PSCO PSA3 42183 720 559 1-R-CF-1778 PSCO PSAl 42139 720 559 1-R-CF-1785 PSCO PSAl 42138 720 559 1-R-ND-0391 (a)

PSCO PSAl 41696 720 559 1-R-ND-0391 (b)

PSCO PSAl 41703 720 559 2-R-NC-1520 PSCO PSA3 42182 720 559 2-R-SM-2038 (b)

PSCO PSAlOO 42252 720 559 1-R-SM-2032 (a)

PSCO PSAlOO 428900 720 595 2-R-SM-2037 (a)

PSCO PSAlOO 42255(

720 595 2-R-SM-2037 (b)

PSCO PSAlOO 42929(

720 595 2-R-SM-2038 (a)

PSCO PSAlOO 49490(

720 595 2-R-SM-2039 PSCO PSAlOO 42921(

720 595 1-A-NV-8503 PSCO PS Al 43026 720 607 1-R-CA-1706 PSCO PSAl 43022 720 607 1-R-ND-0181 PSCO PSAl 43021 720 607 1-R-SM-2032 (b)

PSCO PSAlOO 428920 720 607

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 87 of 93 ATTACHMENT 7 Page 40 of 40

<< Service Life List for Mechanical Snubbers >>

Expected Remaining Life Life Mark No Manf.

Model Serial No.

(months)

(months) 1-R-SM-2033 (a)

PSCO PSAlOO 428930 720 607 1-R-SM-2033 (b)

PSCO PSAlOO 428940 720 607 2-R-SA-1503 PSCO PSAl 43028 720 607 2-R-VC-0007 (a)

PSCO PSAl 43023 720 607

SNUBBER PROGRAM PLAN

<< Service Life List for Lisega Snubbers >>

Expected Next Rebuild Life or Mark No Date Installed Date Rebuilt (months)

Reevaluation 1-SG-AL SN77620-12 12/21/1988 1/1/1988 499 8/1/2029 1-SG-AR SN77620-16 12/21/1988 1/1/1988 499 8/1/2029 1-SG-BL SN77620-11 11/25/2006 1/1/1988 499 8/1/2029 1-SG-BR SN77620-17 5/18/2008 1/1/1988 499 8/1/2029 1-SG-CL SN77620-14 5/29/2005 1/1/1988 499 8/1/2029 1-SG-CR SN77620-13 3/19/2015 1/1/1988 499 8/1/2029 1-SG-DL SN77620-10 12/21/1988 1/1/1988 499 8/1/2029 1-SG-DR SN77620-15 12/3/2012 1/1/1988 499 8/1/2029 2-SG-AL SN77620-21 10/8/2007 1/1/1988 499 8/1/2029 2-SG-AR SN77620-20 4/8/2006 1/1/1988 499 8/1/2029 2-SG-BL SN77620-25 4/17/1989 1/1/1988 499 8/1/2029 2-SG-BR SN77620-23 4/17/1989 1/1/1988 499 8/1/2029 2-SG-CL SN77620-24 3/19/2015 1/1/1988 499 8/1/2029 2-SG-CR SN77620-19 10/1/2013 1/1/1988 499 8/1/2029 2-SG-DL SN77620-18 4/17/1989 1/1/1988 499 8/1/2029 2-SG-DR SN77620-22 4/17/1989 1/1/1988 499 8/1/2029 1-R-BB-1415 5/24/2008 1/1/2005 300 1/1/2030 1-R-CF-1783 6/13/2008 1/1/2005 300 1/1/2030 1-R-CF-1784 6/13/2008 1/1/2005 300 1/1/2030 1-R-ND-0178 (b) 1/13/2011 1/1/2005 300 1/1/2030 2-R-NR-0013 9/26/2007 1/1/2005 300 1/1/2030 1-A-NV-8103 10/29/2012 1/1/2006 300 1/1/2031 1-R-CF-1536 (a) 5/25/2008 1/1/2006 300 1/1/2031 1-R-CF-1559 (b) 5/25/2008 1/1/2006 300 1/1/2031 1-R-CF-1581 (a) 11/26/2006 1/1/2006 300 1/1/2031 1-R-NC-1536 5/20/2008 1/1/2006 300 1/1/2031 1-R-SM-1608 (a) 5/25/2008 1/1/2006 300 1/1/2031 1-R-SM-1610 (a) 11/26/2006 1/1/2006 300 1/1/2031 1-R-SM-1610 (b) 11/26/2006 1/1/2006 300 1/1/2031 1-R-SM-1612 (a) 11/27/2006 1/1/2006 300 1/1/2031 1-R-SM-1612 (b) 11/27/2006 1/1/2006 300 1/1/2031 2-A-NV-3840 (a) 9/27/2007 1/1/2006 300 1/1/2031 AD-EG-CNS-1618 Rev. 002 Page 88 of 93 ATTACHMENT 8 Page 1 of 6 Remaining Life (months) 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 175 175 175 175 175 187 187 187 187 187 187 187 187 187 187 187

SNUBBER PROGRAM PLAN

<< Service Life List for Lisega Snubbers >>

Expected Next Rebuild Life or Mark No Date Installed Date Rebuilt (months)

Reevaluation 2-A-NV-3840 (b) 9/27/2007 1/1/2006 300 1/1/2031 2-R-SM-1590 (b) 9/30/2007 1/1/2006 300 1/1/2031 2-R-SM-1596 (a) 9/30/2007 1/1/2006 300 1/1/2031 2-R-SM-1596 (b) 9/30/2007 1/1/2006 300 1/1/2031 2-R-SM-1602 (a) 9/30/2007 1/1/2006 300 1/1/2031 2-R-SM-1602 (b) 9/30/2007 1/1/2006 300 1/1/2031 2-R-SM-1608 (a) 9/30/2007 1/1/2006 300 1/1/2031 2-R-SM-1608 (b) 9/30/2007 1/1/2006 300 1/1/2031 2-R-TL-2083 3/26/2009 1/1/2006 300 1/1/2031 1-R-CF-1536 (b) 5/25/2008 1/1/2007 300 1/1/2032 1-R-CF-1559 (a) 5/25/2008 1/1/2007 300 1/1/2032 1-R-FW-0001 (a) 5/21/2008.

1/1/2007 300 1/1/2032 1-R-FW-0001 (b) 5/21/2008 1/1/2007 300 1/1/2032 1-R-KC-0247 5/27/2011 1/1/2007 300 1/1/2032 1-R-KC-1477 5/7/2011 1/1/2007 300 1/1/2032 1-R-KD-0122 10/6/2011 1/1/2007 300 1/1/2032 1-R-RN-0394 (a) 6/1/2008 1/1/2007 300 1/1/2032 1-R-RN-0394 (b) 6/1/2008 1/1/2007 300 1/1/2032 1-R-SB-2044 5/20/2008 1/1/2007 300 1/1/2032 1-R-SM-1590 (a) 5/25/2008 1/1/2007 300 1/1/2032 1-R-SM-1590 (b) 5/25/2008 1/1/2007 300 1/1/2032 1-R-SM-1596 (a) 5/25/2008 1/1/2007 300 1/1/2032 1-R-SM-1596 (b) 5/25/2008 1/1/2007 300 1/1/2032 1-R-SM-1598 (a) 5/25/2008 1/1/2007 300 1/1/2032 1-R-SM-1598 (b) 5/25/2008 1/1/2007 300 1/1/2032 1-R-SM-1602 (a) 5/25/2008 1/1/2007 300 1/1/2032 1-R-SM-1602 (b) 5/25/2008 1/1/2007 300 1/1/2032 1-R-SM-1604 (a) 5/25/2008 1/1/2007 300 1/1/2032 1-R-SM-1604 (b) 5/25/2008 1/1/2007 300 1/1/2032 1-R-SM-1608 (b) 5/25/2008 1/1/2007 300 1/1/2032 2-A-Nl-4349 3/26/2009 1/1/2007 300 1/1/2032 2-A-RN-3209 3/16/2009 1/1/2007 300 1/1/2032 2-A-RN-3213 3/30/2009 1/1/2007 300 1/1/2032 2-A-YC-3127 9/24/2010 1/1/2007 300 1/1/2032 AD-EG-CNS-1618 Rev. 002 Page 89 of 93 ATTACHMENT 8 Page 2 of 6 Remaining Life (months) 187.

187 187 187 187 187 187 187 187 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199 199

SNUBBER PROGRAM PLAN

<< Service Life List for Lisega Snubbers >>

Expected Next Rebuild Life or Mark No Date Installed Date Rebuilt (months)

Reevaluation 2-R-CF-1523 (a) 3/23/2012 1/1/2007 300 1/1/2032 2-R-CF-1523 (b) 3/23/2012 1/1/2007 300 1/1/2032 2-R-FW-0003 (a) 3/24/2009 1/1/2007 300 1/1/2032 2-R-FW-0003 (b) 3/24/2009 1/1/2007 300 1/1/2032 2-R-ND-0370 1/17/2011 1/1/2007 300 1/1/2032 2-R-SM-1542 (a) 3/23/2012 1/1/2007 300 1/1/2032 2-R-SM-1542 (b) 3/23/2012 1/1/2007 300 1/1/2032 2-R-SM-1590 (a) 9/30/2007 1/1/2007 300 1/1/2032 1-A-KC-8011 11/20/2009 1/1/2008 300 1/1/2033 1-A-KC-8652 11/17/2009 1/1/2008 300 1/1/2033 1-A-Nl-4137 11/24/2009 1/1/2008 300 1/1/2033 1-A-VG-3158 6/6/2011 1/1/2008 300 1/1/2033 1-R-BB-1582 12/2/2009 1/1/2008 300 1/1/2033 1-R-KC-0309 5/30/2011 1/1/2008 300 1/1/2033 1-R-NC-1633 12/1/2009 1/1/2008 300 1/1/2033 1-R-ND-0178 (a) 1/13/2011 1/1/2008 300 1/1/2033 1-R-N 1-2404 11/18/2009 1/1/2008 300 1/1/2033 1-R-RN-0874(a) 12/1/2009 1/1/2008 300 1/1/2033 1-R-RN-0874(b) 12/1/2009 1/1/2008 300 1/1/2033 1-R-VN-0004 10/6/2011 1/1/2008 300 1/1/2033 1-R-VN-0044 10/19/2011 1/1/2008 300 1/1/2033 2-A-RN-3221 6/30/2010 1/1/2008 300 1/1/2033 2-R-BB-1081 3/31/2009 1/1/2008 300 1/1/2033 2-R-KC-0600 (a) 1/23/2012 1/1/2008 300 1/1/2033 2-R-KC-0600 (b) 1/23/2012 1/1/2008 300 1/1/2033 2-R-NC-1695 9/30/2010 1/1/2008 300 1/1/2033 2-R-VN-0004 6/11/2012 1/1/2008 300 1/1/2033 2-R-VN-0044 12/7/2011 1/1/2008 300 1/1/2033 1-A-FD-3007 6/29/2011 1/1/2009 300 1/1/2034 1-A-FD-3024 6/7/2011 1/1/2009 300 1/1/2034 1-A-FD-3046 6/29/2011 1/1/2009 300 1/1/2034 1-A-FD-3065 6/6/2011 1/1/2009 300 1/1/2034 1-A-VG-3147 6/30/2011 1/1/2009 300 1/1/2034 1-A-VG-3153 6/7/2011 1/1/2009 300 1/1/2034 AD-EG-CNS-1618 Rev.002 Page 90 of 93 ATTACHMENT 8 Page 3 of 6 Remaining Life (months) 199 199 199 199 199 199 199 199 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 211 223 223 223 223 223 223

SNUBBER PROGRAM PLAN

<< Service Life List for Lisega Snubbers >>

Expected Next Rebuild Life or Mark No Date Installed Date Rebuilt (months)

Reevaluation 1-A-VG-3154 6/30/2011 1/1/2009 300 1/1/2034 1-R-KD-0022 6/29/2011 1/1/2009 300 1/1/2034 1-R-LD-0085 6/13/2011 1/1/2009 300 1/1/2034 1-R-NC-1642 12/15/2012 1/1/2009 300 1/1/2034 1-R-NC-1643 12/15/2012 1/1/2009 300 1/1/2034 1-R-NC-2212 5/17/2011 1/1/2009 300 1/1/2034 1-R-N D-0596 8/28/2006 1/1/2009 300 1/1/2034 1-R-RN-0566 7/3/2013 1/1/2009 300 1/1/2034 1-R-VN-0007 11/28/2011 1/1/2009 300 1/1/2034 1-R-VN-0048 7/27/2011 1/1/2009 300 1/1/2034 1-R-VN-0093 11/28/2011 1/1/2009 300 1/1/2034 2-A-RN-3217 7/7/2010 1/1/2009 300 1/1/2034 2-R-LD-0019 3/10/1997 1/1/2009 300 1/1/2034 2-R-NC-1705 (a) 9/30/2010 1/1/2009 300 1/1/2034 2-R-NC-1705 (b) 9/30/2010 1/1/2009 300 1/1/2034 2-R-SA-0021 9/29/2010 1/1/2009 300 1/1/2034 2-R-VN-0055 8/10/2011 1/1/2009 300 1/1/2034 2-R-VC-0043 9/24/2010 1/1/2009 300 1/1/2034 1-R-N D-0182 8/29/2011 1/1/2010 300 1/1/2035 1-R-VN-0010 6/6/2012 1/1/2010 300 1/1/2035 1-R-VN-0014 11/28/2011 1/1/2010 300 1/1/2035 1-R-VN-0015 11/28/2011 1/1/2010 300 1/1/2035 1-R-VN-0050 7/27/2011 1/1/2010 300 1/1/2035 1-R-VN-0051 10/19/2011 1/1/2010 300 1/1/2035 1-R-VN-0053 7 /27 /2011 1/1/2010 300 1/1/2035 1-R-VN-0055 7 /27 /2011 1/1/2010 300 1/1/2035 1-R-VN-0056 10/19/2011 1/1/2010 300 1/1/2035 1-R-VN-0095 7 /27 /2011 1/1/2010 300 1/1/2035 1-R-VN-0096 7/26/2011 1/1/2010 300 1/1/2035 2-R-VN-0007 8/10/2011 1/1/2010 300 1/1/2035 2-R-VN-0009 8/11/2011 1/1/2010 300 1/1/2035 2-R-VN-0010 8/11/2011 1/1/2010 300 1/1/2035 2-R-VN-0012 8/10/2011 1/1/2010 300 1/1/2035 2-R-VN-0014 8/11/2011 1/1/2010 300 1/1/2035 AD-EG-CNS-1618 Rev.002 Page 91 of 93 ATTACHMENT 8 Page 4of6 Remaining Life (months) 223 223 223 223 223 223 223 223 223 223 223 223,

223 223 223 223 223 223 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235 235

SNUBBER PROGRAM PLAN AD-EG-CNS-1618 Rev. 002 Page 92 of 93 ATTACHMENT 8 Page 5 of 6

<< Service Life List for Lisega Snubbers >>

Expected Next Rebuild Remaining Life or Life Mark No Date Installed Date Rebuilt (months)

Reevaluation (months) 2-R-VN-0015 8/11/2011 1/1/2010 300 1/1/2035 235 2-R-VN-0050 9/21/2011 1/1/2010 300 1/1/2035 235 2-R-VN-0093 8/10/2011 1/1/2010 300 1/1/2035 235 2-R-VN-0094 8/10/2011 1/1/2010 300 1/1/2035 235 1-A-KC-4232 12/8/2012 1/1/2011 300 1/1/2036 247 1-R-CF-1745 5/7/2014 1/1/2011 300 1/1/2036 247 1-R-KC-0592 (a) 11/30/2012 1/1/2011 300 1/1/2036 247 1-R-KC-0592 (b) 11/30/2012 1/1/2011 300 1/1/2036 247 1-R-KD-0074 12/1/2012 1/1/2011 300 1/1/2036 247 1-R-NC-1068 5/27/2014 1/1/2011 300 1/1/2036 247 1-R-ND-0341 12/4/2012 1/1/2011 300 1/1/2036 247 1-R-VN-0009 6/6/2012 1/1/2011 300 1/1/2036 247 1-R-VN-0012 11/28/2011 1/1/2011 300 1/1/2036 247 1-R-VN-0094 11/28/2011 1/1/2011 300 1/1/2036 247 2-R-CF-1588 (b) 3/12/2015 1/1/2011 300 1/1/2036 247 2-R-CF-1650 9/20/2013 1/1/2011 300 1/1/2036 247 2-R-GN-1518 3/5/2015 1/1/2011 300 1/1/2036 247 2-R-KD-0033 12/7/2011 1/1/2011 300 1/1/2036 247 2-R-KD-0072 12/7/2011 1/1/2011 300 1/1/2036 247 2-R-KD-0084 11/30/2011 1/1/2011 300.

1/1/2036 247 2-R-NC-1524 (a) 3/29/2012 1/1/2011 300 1/1/2036 247 2-R-NC-1524 (b) 3/29/2012 1/1/2011 300 1/1/2036 247 2-R-NV-0095 3/6/2015 1/1/2011 300 1/1/2036 247 2-R-SB-2040 9/15/2013 1/1/2011 300 1/1/2036 247 2-R-VN-0048 12/5/2011 1/1/2011 300 1/1/2036 247 2-R-VN-0051 12/7/2011 1/1/2011 300 1/1/2036 247 2-R-VN-0053 12/5/2011 1/1/2011 300 1/1/2036 247 2-R-VN-0056 12/7/2011 1/1/2011 300 1/1/2036 247 2-R-VN-0095 12/5/2011 1/1/2011 300 1/1/2036 247 2-R-VN-0096 12/5/2011 1/1/2011 300 1/1/2036 247

I~

SNUBBER PROGRAM PLAN

<< Service Life List for Lisega Snubbers >>

Expected Next Rebuild Life or Mark No Date Installed Date Rebuilt (months)

Reevaluation 2-R-CF-1588 (a) 3/12/2015 1/1/2012 300 1/1/2037 2-R-HR-2083(a) 9/30/2013 1/1/2012 300 1/1/2037 2-R-HR-2083(b) 9/30/2013 1/1/2012 300 1/1/2037 2-R-SB-2041 9/26/2013 1/1/2012 300 1/1/2037 AD-EG-CNS-1618 Rev; 002 Page 93 of 93 ATTACHMENT 8 Page 6 of 6 Remaining Life (months) 259 259 259 259