entergy nuclear operations, inc. en tergy · inservice testing shock suppressor (snubber) program...

En tergyEntergy Nuclear Operations, Inc.Vermont Yankee320 Governor Hunt Rd.Vernon, VT 05354802-257-7711

Coley C. ChappellLicensing Manager

BVY 13-078

August 28, 2013

U.S. Nuclear Regulatory CommissionAttn: Document Control DeskWashington, DC 20555-0001

SUBJECT: Submittal of Snubber Program for the Fifth Ten-Year Inservice InspectionIntervalVermont Yankee Nuclear Power StationDocket No. 50-271License No. DPR-28

Dear Sir or Madam:

In accordance with American Society of Mechanical Engineers Code for Operation andMaintenance of Nuclear Power Plants (ASME OM Code), Subparagraph ISTA-3200(a),attached for your information is a copy of the Snubber Program for Vermont Yankee NuclearPower Station (VYNPS) Fifth Ten-Year Inservice Inspection (ISI) Inteval. The VYNPS Fifth Ten-Year ISI Interval begins on September 1, 2013 and concludes on August 31, 2023.

This letter contains no new regulatory commitments.

Should you have any questions concerning this letter or require additional information, pleasecontact me at 802-451-3374.

Sincerely,

CCC/plc

Enclosures: 1.

cc list: next page

Snubber Program for the Fifth Ten-Year Interval

BVY 13-078 / of 2

cc: Mr. William M. DeanRegional Administrator, Region 1U.S. Nuclear Regulatory Commission2100 Renaissance Blvd, Suite 100King of Prussia, PA 19406-2713

Mr. Richard V. Guzman, Project ManagerDivision of Operating Reactor LicensingOffice of Nuclear Reactor RegulationU.S. Nuclear Regulatory CommissionMail Stop O-8-C2Washington, DC 20555

USNRC Resident InspectorEntergy Nuclear Vermont Yankee, LLC320 Governor Hunt RoadVernon, Vermont 05354

Mr. Christopher Recchia, CommissionerVermont Department of Public Service112 State Street - Drawer 20Montpelier, Vermont 05620-2601

BVY 13-078Docket 50-271

Enclosure 1

Vermont Yankee Nuclear Power Station

Snubber Program for the Fifth Ten-Year Interval

VY Program Section No. SEP-SNB-VTY-001

Revision No. 0Page 1 of 19

VERMONT YANKEE

5 T INTERVAL SHOCK SUPPRESORS (SNUBBERS)

PROGRAM SECTION

SEP-SNB-VTY-001

ENTERGY NUCLEAR ENGINEERING PROGRAMS

APPLICABLE SITES

ANO:

GGNS:

RBS:

W3:

Quality Related:

13

IPEC:

JAF:

PNPS:

VY:

El

El

El[]

YES 99 NO [

Continuous Use 0 Reference Use 13 Informational Use []

VY Program Section No. SEP-SNB-VTY-00IRevision No. 0

Page 2 of 19

REVIEW AND CONCURRENCE SHEET

Program Section Vermont Yankee Shock Suppressors (Snubbers) Program Section

Prepared by: Mike Griffin /Date:Responsible lngineer/Signature

Checked by: William C Pelzer / Date:

Name/Signature

Concurred by: Mark LeFrancois/ / ,,.2•CC..

Responsible Supervisor/SignatureDate: F_,/.0

VY Program Section No. SEP-SNB-VTY-001Revision No. 0

Page 3 of 19

REVISION STATUS SHEET

PROGRAM SECTION REVISION SUMMARY

RevisionI Description

0 Revision 0 is prepared to implement the Vermont Yankee 5th Interval ShockSuppressors (Snubbers) Program Section in compliance with therequirements of 10CFR50.55a(b)(3)(v)(B), ASME OM 2004 Edition throughOMb 2006 Addenda, Subsection ISTD. The Program was also renumberedfrom SEP-SNB-007 to SEP-SNB-VTY-001 to align with fleet numbering.

LIST OF EFFECTIVE PAGES

All pages are revision 0



INSERVICE TESTING SHOCK SUPPRESSOR(SNUBBER)

PROGRAM PLAN

For The 5 th Ten-Year IntervalEffective September 1, 2013

Vermont Yankee Nuclear Power Station

Commercial Service Date: November 29, 1972

Facility Name:Entergy Nuclear Vermont Yankee, LLC

320 Governor Hunt RoadVernon, Vermont 05354-9766

Owner:Entergy Nuclear Operations, Inc.

185 Old Ferry Road; PO Box 7002Brattleboro, VT 05302-7002


Page 5 of 19

TABLE OF CONTENTS

1.0 INTRO DUCTIO N ..................................................................................................... 6

1.1 General ................................................................................................................. 6

1.2 Com m ercial O peration Date and IST Intervals ............................................. 6

1.3 Applicable Codes ............................................................................................ 6

1.4 Purpose ................................................................................................................ 7

1.4 Scope ................................................................................................................... 7

2.0 DEFINITIO NS .................................................................................................................. 7

3.0 PRIMARY RESPO NSIBILITIES ................................................................................ 9

4.0 DETAILS ....................................................................................................................... 10

5.0 REFERENCES AND COM M ITM ENTS ...................................................................... 14

6.0 FINAL CONDITIO NS ................................................................................................ 16

7.0 ATTACHM ENTS ............................................................................................................ 16

8.0 QA REQUIREMENTS CROSS REFERENCE ........................................................... 16



1.0 INTRODUCTION

1.1. General

1.1.1. This document is the Fifth Ten-Year Interval Program Plan (ISTA-1 310 /ISTA-31 10) for In-service Testing (IST) of Snubbers at the Vermont YankeeNuclear Power Station (VY). This Program Plan was prepared in accordancewith the rules of 1OCFR50.55a(b)(3)(v)(B), the ASME Code for Operation andMaintenance of Nuclear Power Plants, ASME OM Code 2004, through theASME OMb Code 2006 Addenda (OM 2004 through OMb 2006 - "TheCode"), Subsection ISTD.

1.1.2. To ensure system structural integrity and operability of snubbers at VY, plantTechnical Specifications 3.6.E /4.6.E and TRM 4.6 require in-serviceinspection and testing of safety related components in accordance with1OCFR50.55a (f) and (g). These documents in turn reference the ASMECode for Operation and Maintenance of Nuclear Power Plants (OM Code) asthe document governing in-service examinations and pre-serviceexaminations for snubbers. To meet these requirements a program ofinspection, testing and scheduled maintenance has been established.

1.2. Commercial Operation Date and IST Intervals

Vermont Yankee began commercial operation on November 29, 1972, and the FirstTen-Year ISI/IST Interval began on that date. The Third Interval start date wasextended from November 30, 1992 to August 31, 1993 (BVY 92-133). This extensionused 9 of the allowable 12 months total extension of intervals permitted by the Code.

The Third-Interval ISI/IST Program was applicable for the interval from September 1,1993 through August 31, 2003. The 4th 10-Year ISI/IST Interval was applicable fromSeptember 1, 2003 through August 31, 2013. Therefore, the 5th 10-Year ISI/IST Intervalis applicable from September 1, 2013 through August 31, 2023.

1.3. Applicable IST Codes

The Fifth 10-Year Interval Snubber Program Plan complies with the OM-2004 Editionthrough the OMb-2006 Addenda. The Fourth 10-Year Snubber Interval Program Plancomplied with ASME OM-1 998 Edition through the OMb-2000 Addenda. The Third 10-Year Interval Snubber Program Plan complied with ASME Section Xl, 1989 Edition.The Second and First 10-Year Interval Snubber Program Plans were governed by VYT.S.



1.4. Purpose

1.4.1. This document provides the VY site specific snubber details to implement theVY Technical Specification (T.S.) / Technical Requirement Manual (TRM)requirements for determining the operability of safety related, hydraulic shocksuppressors (snubbers).

1.4.2. TS 3.0.8 specifically address the inoperability requirements of safety relatedsnubbers.

1.4.3. EN-DC-333 Snubber Inspection Program provides Entergy Fleet Codegeneral requirements including definitions, responsibilities, and generalexamination and test requirements.

1.5. Scope

1.5.1. Those snubbers installed to provide structural integrity for maintainingoperability of safety related systems and components (ISTA-1 100) aredelineated in Table 2 of this Program.

2.0 DEFINITIONS

2.1. Activation - The parameter that verifies restraining action.

2.2. Application Induced Failure - Failures resulting from environmental conditions orapplication of the snubber for which it is not been designed or qualified.

2.3. Bleed Rate - The rate of axial snubber movement under a specified load after activationof the snubber occurs.

2.4. Defined Test Plan Group (DTPG) - a population of snubbers selected for testing inaccordance with the 10% testing sample plan.

2.5. Design or Manufacturing Failure - Failures resulting from a potential defect inmanufacturing or design that gives cause to suspect other similar snubbers. Thisincludes failures of any snubber not to withstand the environment or application forwhich it was designed.

2.6. Draq Force - The force required to maintain the snubber movement at a constantvelocity prior to activation.

2.7. Examination - The performance of visual observation for impaired functional abilitycaused by physical damage, leakage, corrosion, or degradation from environmental oroperating conditions.



2.8. Examination Group - A composition of snubbers which have been selected to beexamined.

2.9. Failure Mode Group (FMG) - A group of snubbers whose failure, or those with potentialfor the same failure, are similar.

2.10. Functional Test - Measurement of parameters to verify snubber performance andoperational readiness.

2.11. Hydraulic Shock Suppressor (snubber) - Devices which transmit applied loads throughhydraulic fluid.

2.12. Inaccessible Snubber - a snubber located in a high radiation area or where otherconditions exist that would render it impractical for examination during normal plantoperations without exposing personnel to undue hazards.

2.13. Isolated Failure - a failure which does not cause other snubbers to become suspect.

2.14. Lock-up Rate - the shaft velocity or acceleration at which the snubber becomes arestraint to dynamic load.

2.15. Maintenance - Replacement of parts, adjustments and similar actions that do notchange the snubber design, performed to prevent deficiencies in the function of thesnubber.

2.16. Maintenance, Repair, and Installation-induced Failures - Failures that result fromdamage during maintenance, repair, or installation activities, the nature of which causesother snubbers to be suspect.

2.17. Normal Operating Conditions - Operating conditions during reactor start-up, operatingat power, hot stand-by, reactor cool down or cold shutdown.

2.18. Operating Temperature - The temperature of the environment surrounding a snubber ata designated plant location during the phase of plant operation for which a snubber isrequired.

2.19. Repair - Action taken to correct deficiencies in the function of the snubber.

2.20. Service Life - The period of time an item is expected to meet operational readinessrequirements without maintenance.

2.21. Swing Clearance - The movement envelope within which the snubber must operatewithout restriction, from the cold installed position to the hot operating position.



2.22. Test Temperature - The temperature of the environment surrounding the snubber at the

time of the test.

2.23. Unexplained Failure - any failure for which the cause cannot be determined.

3.0 PRIMARY RESPONSIBILITIES

3.1. The Program and Component (P&C) Engineering Manager is the program owner andhas the overall responsibility for the establishment, implementation and performance ofthe Shock Suppressor (Snubber) program.

3.2. The P&C Engineering Supervisor is responsible for designating the programcoordinator.

3.3. The assigned NDE Level III is responsible for certifying personnel who perform VisualExaminations are qualified to the requirements of CEP-NDE-01 12 Certification of VisualExamination Personnel.

3.4. The Superintendent of Mechanical Maintenance is responsible for ensuring that thereare adequate qualified personnel available to implement the program.

3.5. The Superintendent of Nuclear Training, Mechanical Maintenance, is responsible forassisting the Maintenance Department to develop and provide the necessary training toqualify personnel to perform snubber functional testing.

3.6. The Snubber Program Engineer is responsible for:

* The snubber program implementation oversight.* Snubber selection to satisfy program requirements.0 Ensuring required visual examinations and functional testing of selected

snubbers are properly identified, planned and scheduled via the Work ControlProcess.

0 Ensuring an adequate inventory of spare snubbers is available to supportsnubber functional testing.

0 Verification and maintenance of examination, testing and calibrationdocumentation.

9 Notifying the ISI Coordinator of planned snubber visual examination andfunctional testing.

0 Ensuring the ISI Coordinator is informed of any visual examination or functionaltesting failures.

* Monitoring the designated service life of each safety related snubber.* Initiating necessary changes in the program or implementing procedures.



Informing the Repair/Replacement Coordinator of snubber testing/replacementto ensure accurate reporting of repair and replacement activities per ASME Sec.XI.

3.7. The Maintenance Supervisor, Mechanical, is responsible for ensuring assignedmaintenance personnel are qualified to perform testing, refurbishment and installation ofsnubbers and to direct their personnel in the accomplishment of those activities.

4.0 DETAILS

4.0. GENERAL

4.0.1. Snubbers examination and testing at VY complies with the requirements ofASME OM Code 2004, through the ASME OMb Code 2006 Addenda,Subsection ISTD; Preservice and Inservice Examination and Testing ofDynamic Restraints (Snubbers) in Light-Water Reactor Nuclear Power Plants

4.0.2. The examination boundary includes the snubber assembly from pin to pin,inclusive (ISTD-31 10).

4.0.3. Visual inspection frequency of safety class snubbers is on a sliding scalebased on the number of unacceptable snubbers found during the previousinspection in proportion to the sizes of the various populations or categories(see Table 1).

4.0.4. Plant snubbers that are not safety related are inspected & tested at afrequency listed under the component's identification number as identified inthe preventative maintenance schedule.

4.0.5. Each refueling cycle a functional test is performed on 10% of all safety relatedsnubbers. For Vermont Yankee that equates to 4 of the 38 snubbers thatmake up the Defined Test Plan Group (DTPG). Any functional test failurerequires an additional 5% be tested until all snubbers are tested, or noadditional failures are found (ISTD-5260).

4.0.6. The 10% sample is representative of all snubbers installed regardless ofmake, model, radiation area, or difficulty in removing. The selection is basedon time since last functional test, size distribution, and service conditions.

4.0.7. As a good practice, more than 10% of the safety related snubber populationwill be replaced/tested/rebuilt each refueling cycle for preventive maintenancepurposes. Only four are required for the 10% Testing Sample Plan. TheDTPG is divided into six sample groups. Refer to Table 2 for a list of thegroups and their required test dates (ISTD-5261).



4.1. TEST EQUIPMENT

4.1.1. The Grinnell Shock and Sway Suppressor (Snubber) Tester and Fill & PurgeMachines shall be operated as directed by approved procedures and thevendor manual. These machines can be used to fill, purge and functionallytest the three brands of hydraulic snubbers within the program scope. Toensure proper operation, these machines should be maintained on a periodicbasis as determined by the Snubber Program Engineer.

4.1.2. The Snubber Tester pressure gauges shall be calibrated in accordance withthe vendor manual within six months of the start of snubber functional testing.Pressure gauge calibrations are valid for one year unless the indicationaccuracy is suspected in error. To ensure proper calibration record retention,the work order process shall be used when calibrating the Snubber Testerpressure gauges (ISTD-5224).

4.1.3. All remaining instrument calibrations shall be as directed by the vendor

manual.

4.2. VISUAL INSPECTION

4.2.1. Snubber visual examination shall be performed in accordance with plantprocedure OP 5203, Inspection and Testing of Shock Suppressors, (LatestRevision) (I STD-1 300/I STD-1 500/ISTD-1620/ISTD-3000/I STD-4000)

4.2.2. For the purpose of visual inspection only, snubbers may be categorized intotwo groups: those accessible and those inaccessible during reactoroperation. Each group may be inspected independently (ISTD-4220).

4.2.3. Inaccessible snubbers shall be inspected only if the period of time in whichthey become accessible is greater than 48 hours (ISTD-4220).

4.2.4. Visual inspections of safety related snubbers included in this program shall beperformed and documented in accordance with an approved visualexamination procedure whenever a visual inspection is conducted to:

Meet 10CFR50.55a requirements.

Document the "as-found" condition prior to removing a snubber forfunctional testing or maintenance.

Document the "as-left" condition following installation of a snubber forservice.



Note: Snubber visual Inspections will continue to be performed using theVT-3 process and qualifications, however an ANII review is not arequirement of the ASME OM Code.

4.2.5. Snubbers which appear inoperable as a result of visual inspections may bedetermined operable for the purpose of establishing the next visual inspectioninterval providing that:

4.2.5.1. The cause of the rejection is clearly established and remedied for thatparticular snubber and for other snubbers that may be genericallysusceptible (ISTD-4240),

4.2.5.2. The affected snubber is functionally tested in the as-found conditionand determined operable (ISTD-5210).

4.2.6. When the inlet fluid port of a hydraulic snubber is found to be uncovered (i.e.,no hydraulic fluid covering the inlet port), the snubber shall be determinedinoperable unless it can be subsequently determined operable via functionaltesting (ISTD-4233).

4.2.6.1. In this case the functional test shall be performed with the piston in theas-found condition, extending the piston in the tension mode direction(ISTD-4233).

4.3. FUNCTIONAL TESTING

4.3.1. Refer to Table 2 to determine which snubbers shall be functionally tested ineach inspection group (ISTD-5250).

4.3.2. Snubber functional testing shall be performed in accordance with plantprocedure OP 5203, Inspection and Testing of Shock Suppressors, (LatestRevision)

4.3.3. The Snubber Tester shall be calibrated prior to use in accordance withassociated preventative maintenance work orders and the vendor manual,VYEM 0062 (ISTA-4200).

4.3.4. The Snubber Tester operator shall be qualified to perform snubber functionaltesting by the Training Department, OJT training module (ISTA-1 100 / ISTA-1500).

4.3.5. A failure of any snubber found during functional testing, for TechnicalSpecification purposes, shall require an additional 5% (quantity = 2) to be



tested until all snubbers are tested or no more failures are found. TheSnubber Program Engineer shall select additional snubbers for functionaltesting and, if required, the selection may include other snubbers in thecurrent inspection group (i.e., those snubbers being removed for preventivemaintenance)(ISTD-5271/ ISTD-5272 / ISTD-5273 / ISTD-5321).

4.3.6. In addition to the snubbers tested in this test group, the previous test grouprecords must be reviewed for any snubber failures that would requirere-testing along with this test group (ISTD-5500).

4.3.7. Any snubber which fails visual inspection shall also require functional testingin the as-found condition. Functional test failures of these snubbers do notrequire testing additional snubbers. Failures here may affect the visualinspection frequency described in section 4.0 (ISTD-4252).

4.3.8. If maintenance is performed on a snubber which could affect its pistonmovement or lockup and bleed rates, then the snubber shall be functionallytested prior to reinstallation (ISTD-5272).

4.3.9. In addition to the regular sample, snubbers which failed the previousfunctional test shall be re-tested during the next test period unless the rootcause for the problem has been determined and corrective actionsimplemented. If a spare snubber has been installed in place of a failedsnubber, then both the failed snubber (if it is repaired and installed in anotherposition) and the spare snubber shall be re-tested during the next test period.Failure of these snubbers shall not require functional testing of additionalsnubbers (ISTD-4252).

4.3.10. If any snubber selected for as-found functional testing either fails to lockup orfails to move (frozen in place), the cause of this failure shall be evaluated. Ifthis failure was caused by manufacturer or design deficiency, all genericallysusceptible snubbers of the same design subject to the same defect shall befunctionally tested. Additional failures here shall not require additionalfunctional testing (ISTD-5272).

4.3.11. For any snubber found inoperable, the Snubber Program Engineer shallinitiate a Condition Report to perform and document an evaluation of thecomponent(s) which are supported by the snubber(s). The purpose of thisengineering evaluation shall be to determine if the component(s) supportedby the snubber(s) were adversely affected by the inoperability of thesnubber(s) in order to ensure that the supported component remains capableof meeting the designed service (ISTD-5280).



4.3.12. Corrective actions requiring repair/replacement activities shall be performedin accordance with ASME Section Xl, as applicable. Other corrective actionsshall be performed in accordance with the VY Corrective Action Program(ISTA-3300).

4.4. SERVICE LIFE MONITORING

4.4.1. All snubbers under this program are expected to meet operational readinessrequirements without maintenance for a period of ten (10) years. Snubberservice life begins upon installation and ends when it is replaced orrefurbished (ISTD-6000).

4.4.2. All snubbers under this program are replaced with a new or refurbishedsnubber once every nine (9) years. This ensures testing on a rotating basisto coincide with service life monitoring.

4.4.3. A record of the service life of each safety related snubber shall be maintainedby the Snubber Program Engineer via Work Orders (controlled records) andmaintenance history files (uncontrolled records). The snubber serial numberis the method used to track the service life of a particular snubber in a givenlocation.

4.4.4. At least once each operating cycle, the Snubber Program Engineer shallreview the installation and maintenance records for each safety relatedsnubber to verify the designated service life has not been exceeded nor will itbe exceeded prior to the next snubber service life review. If service life will beexceeded before the next scheduled system or plant outage, one of thefollowing actions shall be taken (ISTD-6200):

4.4.4.1. The snubber will be replaced with another snubber that has anexpected service life exceeding the date of the next scheduled systemor plant outage.

4.4.4.2. Technical justification shall be documented for extending the service lifeto or beyond the next scheduled system or plant outage.

4.4.4.3. The snubber shall be refurbished such that its service life will extend toor beyond the next scheduled system or plant outage.

4.4.5. New snubbers issued from Stores inventory shall have new elastomersinstalled prior to functional testing and installation to ensure elastomer partsare up to date at the beginning of the designated service life.



4.4.6. Refurbished snubbers shall be returned to Stores inventory and issued to thedesignated system location prior to functional testing and system installation.This ensures documented serial number traceability (ISTD-5227).

5.0 REFERENCES AND COMMITMENTS

5.1. Technical Specification and Site Documents

5.1.1. TS 3.6.E and 4.6.E, Structural Integrity and Operability Testing5.1.2. TS 3.0.8 and TRM 4.6.1, Shock Suppressors (Snubbers)

5.2. Administrative Limits

5.2.1. None

5.3. Codes, Standards and Regulations

5.3.1. Code of Federal Regulations, 10CFR50.55a(b)(3)(v)(B)5.3.2. ASME Boiler and Pressure Vessel Code, Section Xl, Rules for Inservice

Inspection of Nuclear Power Plant Components, 2007 Edition, 2008 Addenda5.3.3. ASME OM Code-2004 Edition through OMb 2006 Addenda, Subsection

ISTD, Preservice and Inservice examination and Testing of DynamicRestraints (Snubbers) in Light Water Reactor Nuclear Power Plants.

5.4. Commitments

5.4.1. CR-VTY-2003-02110 CA-00001, Perform a Documented Reconciliation of theSnubber Testing Program.

5.4.2. CR-VTY-2003-02110 CA-00002, Prepare a Program Procedure.

5.5. Supplemental References

5.5.1. MEG-102/77, Vermont Yankee Snubbers, G.E. O'Connor to J.L. French5.5.2. MED-257/78, Vermont Yankee Hydraulic Snubbers, T.M. Cizauskas to D.E.

Moody5.5.3. OPVY425/87, Snubber Operability, R.L. Smith to D.A. Reid5.5.4. OPVY541/89, Closeout Summary for Service Request 88-76, Snubber

Operability During Shutdown Conditions, R.L. Smith to D.A. Reid5.5.5. VYEM 0062, Grinnell Hydraulic Shock and Sway Suppressors (Snubbers)5.5.6. EN-AD-103, Document Control and Records Management Activities5.5.7. EN-LI-1 02, Corrective Action Process5.5.8. EN-QV-102, Inspection Program5.5.9. CEP-NDE-0903, VT-3 Examination5.5.10. SEP-RR-VTY-001, ASME Code Section Xl Repair/Replacement Program5.5.11. EN-WM-102 Work Implementation & Closeout


Page 16 of 19

5.5.12. AP 0125, Plant Equipment5.5.13. AP 0315, Equipment Alterations5.5.14. OP 5203, Inspection and Testing of Shock Suppressors5.5.15. SEP-ISI-VTY-001, Vermont Yankee Inservice Inspection Program5.5.16. EN-DC-333, Snubber Inspection Program

6.0 FINAL CONDITIONS

6.1. None

7.0 ATTACHMENTS

7.1. Table 1, Visual Exam Table (inspection intervals)7.2. Table 2, DTPG Snubber Inspection Program

8.0 QA REQUIREMENTS CROSS REFERENCE

8.1. None


Page 17 of 19

TABLE 1

VISUAL EXAMINATION TABLE

NUMBER OF UNACCEPTABLE SNUBBERS

Population or Category Column A Column B Column C(Notes 1) Extended Interval Previous Interval Reduce Interval

(Notes 2 & 3) (Notes 2, 4 & 5) (Notes 2, 5 & 6)

1 0 0 1

80 0 0 2

100 0 1 4

150 0 3 8

200 2 5 13

300 5 12 25

400 8 18 36

500 12 24 48

750 20 40 78

1,000 or greater 29 56 109

NOTE (1):

NOTE (2):

NOTE (3):

NOTE (4):

NOTE (5):

NOTE (6):

Interpolation between population or category sizes and the number of unacceptable snubbers ispermissible. The next lower integer shall be used when interpolation results in a fraction.

The basic interval shall be the normal fuel cycle up to 24 months. The examination interval maybe as great as twice, the same, or as small as fractions of the previous interval as required by thefollowing Notes. The examination intervals may vary by ± 25% of the current interval.

If the number of unacceptable snubbers is equal to or less than the number in Column A, then thenext examination interval may be increased to twice the previous examination interval, not toexceed 48 months. In that case, the next examination according to the previous interval may beskipped.

If the number of unacceptable snubbers exceeds the number in Column A, but is equal to or lessthan the number in Column B, then the next visual examination shall be conducted at the sameinterval as the previous interval.

If the number of unacceptable snubbers exceeds the number in Column B, but is equal to or lessthan the number in Column C, then the next examination interval shall be decreased to two thirdsof the previous examination interval or, in accordance with the interpolation between Columns Band C, in proportion to the exact number of unacceptable snubbers.

If the number of unacceptable snubbers exceeds the number in Column C, then the nextexamination interval shall be decreased to two-thirds of the previous interval.


Page 18 of 19

TABLE 2DTPG SNUBBER INSPECTION PROGRAM

Code Location Sample YEARSNUBBER ID Class Group

_________ Class 04 05 07 08 10 11 13 14 16 17 19 20 22 23

HPCI-HD103FN 2 HPCI Room 1 ET ET

RHR-H185 2 RB 232'NE CR 1 ET ET

RR-3 1 Drywell 1 ET ET

CS-HD54A 2 Top of Torus 1 ET ET

RHR-H197 (A) 2 RB 232' NE CR 1 R R

RR-35 1 Drywell 1 R R

RHR-H197 (B) 2 RB 232' NE CR 2 ET ET

HPCI-HD103GN 2 HPCI Room 2 ET ET

RHR-HD127M 2 RB 213'SE CR 2 ET ET

RR-2 1 Drywell 2 ET ET

CS-HD54H (A) 2 Top of Torus 2 R R

MS-3 1 Drywell 2 ET R R

HPCI-HD103EN 2 HPCI Room 3 R R R

HPCI-HD102EN 2 HPCI Room 3 R R R

MS-24 1 Drywell 3 R R R

SLC-H48 1 Drywell 3 ET ET ET

CS-HD90C 2 RB 213' Torus 3 ET ET ET

FW-15 1 Drywell 3 ET ET ET

MS-32 1 Drywell 3 ET ET ET

RR-34 1 Drywell 4 R '_R R

MS-15 1 Drywell 4 R R R

FW-3 1 Drywell 4 R R R

MS-6 1 Drywell 4 ET ET ET

RHR-H183 2 RB 232' NE CR 4 ET ET ET

RR-62 1 Drywell 4 ET ET ETRR-63 1 Drywell 4 ET ET ET

CS-HD86C 2 Top of Torus 5 R R

HPCI-HD102DN 2 HPCI Room 5 R R


Page 19 of 19

TABLE 2 (CONTINUED)Code Location Sample YEAR

SNUBBER ID Class Group_______ Clas 04 05 07 08 10 11 13. 14 16 17 19 20 22 23

MS-35 1 Drywell 5 ET ETCU-2 1 Drywell 5 ET ET

RHR-H98 (A) 2 RB 252' South 5 ET ET

RHR-H193 2 RB 252' North 5 ET ETHPCI-H1O3B 2 HPCI Room 6 R R

RHR-HD184B 2 RB 213' Torus 6 ET ET

CS-HD54H (B) 2 Top of Torus 6 ET ET

RHR-H98 (B) 2 RB 252' South 6 R R

RHR-HD134 2 Top of Torus 6 ET ET

RHR-HD127L 2 RB 213' Torus 6 ET ET

NOTES:1. Although all snubbers in a group will be replaced with a new or rebuilt unit, only the ones with an "ET" will require Examination and functional Testing

to meet Technical Specification requirements.2. The remaining snubbers "R" in that inspection group are being replaced for preventive maintenance (shelf life of rubber goods) and do not requirefunctional testing. They may, however, be utilized for functional testing in the event of a Technical Specification functional failure and required testscope expansion.

MS-32 was mistakenly replaced instead of MS-3. Credit for a satisfactory functional test was taken for MS-32. MS-3 was functionally tested andreplaced with a refurbished snubber during RFO-24 in 2004. MS-3 and MS-32 will remain in their current groups.