attachment 1 to pla-6501 ppl calculation ec-037-001 · 2012-12-01 · for inforrhatiori only page...

Attachment 1 to PLA-6501

PPL Calculation EC-037-001

For Infortatiol Only PCAF #2007-1057Page 9 of 10

NUCLEAR ENGINEERING CALCULATION COVER SHEET

NEPM-QA-0221-1 1. Page 1 of 15Total Pages 17

3-2. TYPE: CALC >3. NUMBER: EC-037-1001 >4. REVISION: 3

*>5. UNIT 3 *'>6. QUALITY CLASS: Q

>7. DESCRIPTION: HPCI and RCIC Automatic CST Suction Transfer Setpoint and Technical

Specification Allowable

8. SUPERSEDED BY: N/A

9. Alternate Number: 10. Cycle: N/A

11. Computer Code/Model used: 12. Discipline: I

> 13. Are any results of this calculation described in the Licensing Documents?

0 Yes, Refer to NDAP-OA-0730 and NDAP-QA-0731 El No

>14. Is this calculation changing any method of evaluation described in the FSAR and using the results tosupport or change the FSAR? (Refer to PPL Resource Manual for Definition of FSAR)

El Yes, 50.59 screen or evaluation required. 0 No

>15. Is this calculation Prepared by an External Organization?

0l Yes CD No

EG771 Qualifications may not be required for'individuals from external organizations (see Section 7.4.3).

>16. Prepared by': Arthur J. White • -

>17. Reviewed by':

>18. Verified by:

>19. Approved by:

>20. Accepted by:

Print Name (EG771 Quaificatlon Required) bate'

Print Name (EG771 Qualfltcatlon Required) S1 bate

Print Name (EG771& QADR Qualification Required) Signat~e 'DatePR W~v. .r;4

Print Name (Qualified per NEPM-OA -0241 and U Signature Datecomply with Section 7.8 of tiEPM-QA-0221)

Print Name (EG771 Qualification Required) and Signature Datecomply with Section 7.9 of NEPM-OA-0221

For Fire Protection related calculations see Section 7.4.3,14 for additional qualification requirements

ADD A NEW COVER PAGE FOR EACH REVISION Verified FieldsFORM NEPM-QA-0221-1, Revision 10, Page 1 of 1, ELECTRONIC FORM > REQUIRED FIELDS

For Inforrhatiori Only

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CALCULATION REVISION DESCRIPTION SHEET

NIEPM-QA-0221-2

REVISION NO: 3 CALCULATION NUMBER: EC-037-1001

[ FULL REVISION El SUPERSEDED

[ PAGE FOR AGE El VOIDED

Revised A R R DescriptionPages d p m of Revision on the Listed PagesPgsd I v

El Q

____ThEl T _ ___ __

____~~~~~El T T ___ _ _D3 D ED

,0 D'. Q_______ El W

_ _ _ _ _ _~ [ El El C] _ _ _ _ _ _

_ _ _ _ o m m ,..__ __ __ __

[] 0____ Th []

FORM NEPM-QA-0221-2, Revision 5, Page 1 of 1, ELECTRONIC FORM

For Inforrhatiori Only

Page lb

TECHNICAL CHANGE SUMMARY PAGENEPM-QA-0221-5

Calculation: Number: EC-037-1 001 Revision No. 3

This form shall be used to (1) record the Technical Scope of the revision and (2) record thescope of verification if the calculation was verified. It should not be more than one page. Itspurpose is to provide summary information to the reviewer, verifier, approver, and acceptorabout the technical purpose of the change. For non-technical revisions, state the purpose orreason for the revision.

Scope of Revision: Clarified the bases for the Allowable Value, the Nominal Trip Setpoint andthe instrument tolerances for the HPCI and RCIC instruments that provide a suction transfer fromCST to the Suppression Pool on low CST level. This clarification is based on originaldocumentation pertaining to the mechanical switch, the recommendation of experienced I&CMaintenance personnel, and a statistical analysis of the drift data.

Scope of Verification (If verification applies): Scope of verification applies only to changes made inthis calculation revision including the addition of Appendices A and B.

FORM NEPM-QA-0221-5, Revision 0, Page 1 of 1, ELECTRONIC FORM

For Inforrtation Only

Calculation EC-037-1001Revision 3

Page 2 of 15

OBJECTIVE:

Document the basis for the process setpoint for the HPCI and RCIC automatic suction transfer from theCondensate Storage Tank (CST) and to document the basis for the technical specification allowablevalue for the HPCI and RCIC suction transfer from the CST.

INTRODUCTION:

Background:

The CST is the primary source of water for the HPCI/RCIC system and these systems are normallyaligned to the CST. Note however that the suppression pool is the safety related source of water for thissystem. The HPCI and RCIC systems provide makeup water to the RPV during accident conditions. Thesystem will automatically transfer from the CST to the suppression pool when level in the CST reachesthe suction transfer setpoint. Level switches gire provided In the CST to initiate the automatic suctiontransfer to the suppression pool. The switches must be set high enough to ensure adequate NSPH to thepumps and to prevent unacceptable vortex formation in the suction piping to ensure pump operation isnot compromised during the transfer.

The switches which accomplish the suction transfer from the CST to the suppression pool for the HPCIsystem are:

LSLL-E41-1N002 LSLL-E41-2N002

LSLL-E41-1N003 LSLL-E41-2N003

The switches which accomplish the suction transfer from the CST to the suppression pool for the RCICsystem are:

LSL-E51 -1 N035A LSL-E51-2N035ALSL-E51 -1 N035E LSL-E51-2N035E

These instruments also initiate an alarm in the control room. The alarm setpoint and the suction transfer

setpoint are the same.

Statement of Problem:

As documented in AR 667984, the existing technical specification allowable value for a HPCI system CSTlow level transfer was found to be inadequate and results In possibility of vortex formation in the HPCIsuction line from the CST during the transfer process, if the transfer were to occur at the current technicalspecification allowable value (36 inches above tank bottom). Once a suction transfer is initiated, the levelin the CST will continue to drop until the suction transfer Is completed. The previous revision of thiscalculation (EC-037-1001, Rev. 1) did not adequately account for the stroke times of the HPCI suctionvalves to complete the suction transfer.

A flow model has since been developed (EC-052-1055) to account for valve stroke times during thetransfer process. The model ensures that the new technical specification allowable values are adequateto ensure no unacceptable vortex formation in the HPCI or RCIC suction lines during an automaticsuction transfer from the CST to the suppression pool at maximum system flow conditions. Engineeringchanges EC 823975 and EC 823991 are being developed in support of the HPCI suction transfer logicchanges.

This calculation revision will document the basis for the new technical specification allowable value for

For Inforrhation Only


Page 3 of 15

HPCI system and document the basis acceptability of the existing technical specification allowable valuefor the RCIC system. This calculation revision will also evaluate acceptability of the existing processsetpoints and setpolnt tolerances required to support the low CST level transfer changes for both theRCIC and HPCI systems. This calculation revision will also address impacts of the required tech specand process setpoint changes on the applicable RCIC and HPCI system design basis requirements.

REFERENCES:

1. EDR G20054

2. Level Setting Diagram J-653 sh. 21, revision 6

3. FF101270 sh. 9401, revision 6 (12" shell nozzle)

4. PP&L calculation EC-037-0501, Revision 1 - "Calculation of CST Reserve Storage for HPCVRCICSystems"

5. PP&L Final Safety Analysis Report (FSAR)

6. Unit 1 and 2 Technical Specifications

7. Technical Specification Bases, Section B 3.3.5.1

8. OP-1 52-001 -Operating Procedure - HPCI System

9. ES-1 (2)52-002 - "HPCI Suction Auto Transfer Bypass".

10. PPL Calculation EC-052-1055, Revision 0 - CST Water Level for HPCI/RCIC Suction Transfer

11. AR 667984 - HPCI Suction Transfer on Low CST Level

12. EC 823975 (Unit 1) and EC 823991 iUnit 2) - HPCI Automatic Suction logic Transfer Changes

13. JDS-02 - Instrument and Control Setpoint Calculation Methodology

14. M-108-025 Rev. 0, TSL for 0T522A

15. GE Specification 22A1362AW Rev. 9, DESIGN SPEC DATA SHEET HIGH PRESSURECOOLANT INJECTION SYSTEM

16. GE Document 22A5261AK Rev. 0, INFORMATION DOCUMENT DATA SHEET ONINSTRUMENT SETPOINTS & TECHNICAL SPEC LIMITS

17. GE 234A9309AE Rev. 6, 8856-M1-E41-60 Sh. 1 Rev. 14, FF127250, Sh. 6001 Rev. 14,INSTRUMENT DATA SHEET HIGH PRESSURE COOLANT INJECTION SYSTEM

18. M1-E41-68 Sh. 1, Rev. 2, GE Purchased Part Drawing 159C4294P002, PURCHASED PARTLEVEL SWITCH GENERAL USE

19. GE 234A9310AE, M1-E51-91 Sh. 1 Rev. 11, REACTOR CORE ISOLATION COOLING SYSTEM



Page 4 of 15

BASIS FOR CURRENT AND REVISED CST SETPOINTS FOR THE HPCI AND RCIC SYSTEMS:

EC 823975 (Unit 1) and EC 823991 (Unit 2) have been initiated to change the suction transfer logic suchthat the HPCI Suppression Pool Suction Valve and the HPCI Condensate Storage Tank Suction Valveoperate in parallel, rather than in series. Under the current transfer logic, upon initiation of a HPCIautomatic suction transfer on low CST level, the suppression pool suction valve (HV1(2)55F042) will gofull open. Once the valve is full open, a signal will be initiated to close the condensate storage tank (CST)suction valve (HV1 (2)55F004). The proposed HPCI suction transfer EC's involves changing the suctiontransfer logic such that the HPCI Suppression Pool Suction Valve and the HPCI Condensate StorageTank Suction Valve operate simultaneously, rather than in series. This change will prevent the potentialfor unacceptable vortex formation in the HPCI suction line during a HPCI automatic suction transfer fromthe CST to the Suppression Pool. Vortex fomatlon in the suction lines would introduce air in the line andpotentially render the HPCI pump inoperable. Operating the HPCI suction valves in parallel will speed upthe transfer process and also increases reliability of the transfer function.

A flow model has been developed (Reference 10) which demonstrates that as long as the HPCI suctiontransfer from the CST to the suppression pool Is initiated prior to CST level reaching 40.5 inches abovethe tank bottom, there will be no unacceptable vortex formation in the HPCI and RCIC suction lines duringthe transfer process and these systems would remain fully functional throughout and following a suctiontransfer. Therefore, the existing technical specification allowable value for the HPCI CST low leveltransfer (Table 3.3.5.1-1) will be increased from 2: 36 Inches to > 40.5 inches (more conservativedirection) above tank bottom in support of the.se EC's. The evaluation also assumes the RCIC automaticsuction transfer from the CST occurs at the existing technical specification allowable value of 36 inchesfrom tank bottom. Therefore, this evaluation also documents acceptability of the existing technicalspecification allowable value for the RCIC automatic suction transfer from the CST. The evaluationassumes both HPCI and RCIC systems in service at maximum flow conditions since HPCI and RCICsystems share a common CST suction line. The analysis (EC-052-1055) is conservative since it does notcredit the vortex breaker installed inside the CST at the HPCI/RCIC suction nozzle. It should be-notedthat direct determination of a technical specification allowable value by means of a calculation is notconsistent with the conventional methodology described in JDS-02 (Reference 13), but it is consistentwith the original design basis for these level Instruments and it is consistent with Technical SpecificationBases 3.3.5.1, which states that "the allowable values for these level instruments are based on systemcalculations and/or engineering judgment which establishes a conservative limit at which the functionshould occur. It should also be noted that exceptions to the conventional instrument setpointmethodology are allowed per JDS-02 (Reference 13), provided justification for deviation from therecommended practice is provided. The justification for the new technical specification allowable valuesand the corresponding instrument process selpointlprocess setpoint tolerances is provided herein.See Appendices A and B for further detail.

It is demonstrated In this calculation that the currently existing HPCI and RCIC Process Setpolnts (43.5"above the bottom of the CST) provide a high degree of assurance that the instrument cannot drift belowthe Allowable Value. This is accomplished through a statistical evaluation of historical data obtained fromsurveillance of these instruments. Since for this particular case, the variation of the actual instrument tripsetpoint Is well understood based on a significant history of plant surveillance data, and also due to thesimple design of the mechanical float switches, this approach Is more reliable than the conventionalmethodology presented in JDS-02, which relies on constituent uncertainties that are not well defined forthese instruments.

Instrument surveillance data for both the RCIC and HPCI level switches has been evaluated over the past4 years and is summarized in Tables 1 and 2. The following conclusions have been reached based onthe data review and application of Normal probability distribution:

1. The maximum calculated standard deviation about the mean actual setpoint is 0.28 inches.

2. There is 95.4 % confidence that the actual instrument set points will not drift below 42.4 inches



Page 5 of 15

(based on 3-month surveillance interval and using the "worst case" instrument data.)

3. There is 99.7% confidence that the actual instrument setpoints will not drift below 42.1 inches(based on 3-month surveillance interval and using the "worst case" instrument data.)

4. There is an insignificant chance (probability <2.0E-07) that an actual trip setpoint could be foundas low as 41.5 inches (1 inch above the Allowable Value) during calibration check. Therefore, theonly reasonable way that the setpoint could drop to this level would be if the instrument weredamaged or broken. It should be noted that in this case, the redundant level instrument would beavailable to perform the required transfer function.

Based on this statistical evaluation, the currently existing Process Setpolnt of 43.5 Inches provides a highdegree of assurance that calibration checks will not find that the HPCI suction transfer level Instrumentshave drifted to the non-conservative side of the Allowable Value (40.5 inches). This conclusion clearlyholds for the RCIC instruments as well since the margin from the Process Setpoint (43.5 inches) to theAllowable Value (36.0 inches) is considerably greater than for HPCI, and the instruments are of the sametype. It is therefore concluded that the existing Process Setpoint of 43.5 inches for the HPCI and RCICCST suction transfer switches Is acceptable.

Based on conservatisms used in the flow-model evaluation (EC-052-1055) and the fact that (based on areview of historical data and the simple design of the switches) these mechanical level instruments arehighly accurate and exhibit very little drift, the ,Alowable Value and the Trip Setpoint are taken to be thesame value. The allowable value Identified in Technical Specification Table 3.3.5.1 and the Trip Setpointidentified In the Technical Requirements Manual, Table 2.2-1, are currently the same value (36 inches)for both the RCIC and HPCI systems. This value will be changed for the HPCI system to the new value(40.5 inches) in support of the EC's.

As discussed above, the HPCI and RCIC suction transfer-levelinstruments are set at 43.5 inches fromthe tank bottom. This setpoint is fixed by the location at which the switches are installed on the tank. Theproposed EC's maintain the current Instrument Process Setpolnt of 43.5 inches, which eliminates theneed to modify the tank and relocate the switches. Since the minimum height for the suction transfer toinitiate Is changing from 36 Inches above tank bottom for the HPCI system to 40.5 inches above tankbottom, there will be a net reduction in margin between the Process Setpoint and the technicalspecification Allowable Value. The historical setpoint tolerance used in the HPCI Surveillance Procedure(SI-1 52/252-308) is ± 1.5 inches (final tolerance). The historical as-found tolerance for these instrumentsis ± 3 inches. Since there is a net reduction in margin between the allowable value and the processsetpoint, this tolerance is excessive. Although not physically possible based on the simple design of themechanical float switches, the current as-found tolerance would theoretically allow the setpoint to driftdown to the Allowable Value, which is not acceptable since that would leave no margin to account forinstrument accuracy. Consequently, a new sel:point tolerance, which more closely relates to theinstrument capabilities, has been developed.See Appendices A and B for further Detail.

Based on the instrument surveillance data summarized in Tables 1 and 2, it is concluded that the existingInstrument setpoint tolerances can be tightened to be more representative of actual instrumentperformance. The data shows that the maximum deviation in measured setpoint from the ProcessSetpoint of 43.5 inches is approximately 1 inch with a 95.4% confidence factor (2 standard deviations)using the "worse case* instrument data. This evaluation supports a reduction in the allowable as-leftinstrument tolerance from ± 1.5 inches to ± 1.0 inches. In addition, this evaluation supports a reduction Inthe as-found tolerance from ± 3.0 Inches to ± 2.0 inches, since the risk of the actual Instrument setpoint(as determined by calibration check) drifting down to:41.5 inches has been evaluated as insignificant.The as-found instrument tolerance (43.5 ± 2.0 inches) also provides adequate margin to the HPCItechnical specification Allowable Value (40,5 inches), even if the setpoint were to drift to the minimum as-found tolerance level of 41.5 inches. The 1 inch margin is within the established accuracy of these levelinstruments.

For Informhation Only


Page 6 of 15

These changes are consistent with the supplemental setpoint tolerance evaluations provided inAppendices A and B.Note also that redundant instruments are used in this application, so that if the setpoint were to driftexcessively because an instrument was damaged or broken, the other instrument would be available toperform the required transfer function.

Based on the historical data review and the proposed Process Setpoint tolerance changes, it is concludedthat there is adequate margin between the Process Setpoint and the new Allowable Value for the HPCIlevel instruments. Even though the technical specification Allowable Value for the RCIC system levelinstruments (36 inches) is not being changed, the setpoint tolerance changes will be applied to the RCICInstrumentation as well, since these tolerances are more representative and appropriate for the actual levelinstrument performance.

PROPOSED CHANGE IMPACTS:

Potential Design Basis Impacts:

1. NPSH available must exceed NPSH required as defined in the FSAR, section 6.3.2.2.1:

This requirement will not be adversely, affected. The CST water level is conservatively assumedto be two feet below the CST suction i!ransfer level in the existing NPSH calculations. The NSPHavailable to the HPCI pump will not decrease with the HPCI suction valves stroking in parallelduring a suction transfer from the CST to the suppression pool, as documented in EC-052-1055.For the HPCI system, the technical specification allowable value for the low level transfer isincreasing from 36 inches to 40.5 inches, therefore the NPSH available to the HPCI pump at thetechnical specification allowable value will be greater. For the RCIC system no changes arebeing-made that would adversely impact NPSH available to-the RCIC pumps. The actualinstrument setpoints (43.5 inches from tank bottom) are not being changed by this EC.Therefore, the HPCI and RCIC pump NPSH requirements are not adversely affected by thischange.

2. The CST's were originally designed to provide a minimum storage capacity of 135,000 gallons forthe RCIC and HPCI pumps associated with each unit. The 135,000 gallon reserve volumerequirements were based on a GE Guideline which calculates the reserve volume based on theRPV inventory loss due to boil off rate in the reactor for an 8 hour Integrated decay heat factor(DBD041).

As documented in EC-037-0501 Revision 1, the 135,000 reserve volume discussed in the FSARand DBDO04 equates to the dedicated volume available in the CST down to the top of theHCI/RCIC suction nozzle. This dedicated volume was established as part of the original tankdesign, based on the original GE guideline to size the CST reserve volume to support 8 hours ofdecay heat removal and, as such, remains unchanged. The CST reserve volume availablefollowing implementation of EC82397.5 and EC823991 was evaluated in EC-037-0501 and wasfound to be adequate to fully support RCIC and HPCI operation at final EPU conditions.

3. The inventory available In the CST must be adequate to support HPCI and/or RCIC systemsoperation during ATWS, Station Blackout and Appendix R Safety shutdown events.

The reserve CST volume is credited in ATWS, Appendix R and SBO evaluations. Asdocumented in EC-037-0501, the reserve volume available in the CST following implementationof EC 823975 and EC 823991 is adequate to fully support these supplemental design functions.It is concluded that the reserve volume in the CST is considered adequate to fully support HPCIand RCIC system operation.



Page 7 of 15

Potential Technical Speclflcation Impacts:

1. The Unit 1 and 2 Technical Specifications address the automatic suction transfer setpoint for HPCIand RCIC. Tables 3.3.5.1-1 and 3.3.5.2-1 establish the Condensate Storage Tank Level - Lowallowable value for the HPCI and RCIC Systems, respectfully.

Allowable Value: > 36" above tank bottom

A change will be required to Table 3.3.5.1-1 to change the technical specification allowable valuefor a HPCI automatic suction transfer from the CST. A technical specification change will beprocessed under EC 823975 and EC 823991 to change the technical specification allowablevalue from 36 inches to 40.5 inches above tank bottom. Justification for this change is providedin this calculation and the Modification Safety Assessment for EC 823975 and EC 823991.

2. The Unit 1 and Unit 2 Technical Requirements Manual (TRM), Table 2.2-1 Includes theinstrument Trip Setpoint for the HPCI CST Level - Low transfer function.

A change will be required to this Table to change the instrument Trip Setpoint from the currentvalue of> 36 inches above tank bottom to > 40.5 inches above tank bottom. Justification for thischange is provided in this calculation and the Modification Safety Assessment for EC 823975 andEC 823991.

3. Technical specification Surveillance requirement 3.5.2.1 and 3.5.2.2require verification that eitherthe suppression pool level is a 20 feet or that the Core Spray system is aligned to take suctionfrom the CST and the CST contains 2 135,000 gallons of water, equivalent to 49% of capacity.

Since the proposed change does not involve any physical changes to the CST or associatedpiping, this technical specification surveillance is not adversely affected.

4. The Technical Specification Bases. Section 3.3.5.1 (Background section and Section 3.d),describes operation of the HPCI automatic transfer function, describing the suction valesoperating In series as presently designed.

A change will be required to Section 3.3.5.1 in the technical specification bases to incorporate theHPCI automatic transfer logic changes from series operation to parallel operation per EC 823975and EC 823991.

CONCLUSION:

A summary of the existing versus the new Process Setpoints, Process Setpoint tolerances and AllowableValues for the HPCI and RCIC automatic transfor functions is provided below. The new Allowable Values areobtained from the flow analysis documented In EC-052-1055. These values will ensure satisfactory pumpperformance during a suction transfer from the CST to the suppression pool. The Technical Specificationchanges, Technical Specification Bases changes and Technical Requirements Manual changes will beimplemented under the proposed EC's.

The Process Setpoints are adequate to ensure, with a high-degree of confidence that the HPCI and RCICautomatic suction transfer will occur prior to reaching the technical specification Allowable Values. TheAllowable Values were established consistent with the Technical Specification Bases, Section B3.3.5.1, whichindicates that the allowable values for these instruments can be based on system calculations and/orengineering judgment to establish a conservative limit at which the function (the automatic level transfer) canoccur.

For Inforrmation Only


Page 8 of 15

New setpoint tolerances were established based on the documentation of the original design basis of themechanical switch requiring a 1" calibration accuracy, the data sheet showing the purchase requirements of anadjustable range of (+/-)l", the recommendation of experienced I&C Maintenance personnel, and a statisticalanalysis of the drift data. See Appendices A and B for further detail. These instrument data are morerepresentative of actual instrument performance. These tolerances provide adequate margin to the revisedtechnical specification allowable value for the HPCI system. The setpoint tolerance changes will beimplemented for the RCIC system instrumentation as well, since these instruments are identical to the HPCIinstruments.

This evaluation and the Modification Safety Assessment generated for EC 823975 and EC823991 documentsthat these changes will not adversely impact any HPCI or RCIC system design functions.

Instrument ID TS Allowable Value TS Allowable Process Setpoint Process SetpointTRM Trip Setpoint Value & TRM (CURRENT) (NEW)(CURRENT) Trip Setpoint

(NEW)

LSLL-E41 -1 N002 36 Inches 40.5 Inches 43.5 Inches 43.5 inchesLSLL-E41 -1 N003 36 inches 40.5 Inches 43.5 Inches 43.5 inchesLSLL-E41-2N002 36 inches 40.5 inches 43.5 inches 43.5 inchesLSLL-E41-2N003 36 inches 40.5 inches 43.5 inches 43.5 inches

LSL-E51 -1 N035A 36 inches 36 inches 43.5 inches 43.5 inchesLSL-E51-1 N035E 36 inches 36 inches 43.5 inches 43.5 inchesLSL-E51-2N035A 36 inches 36 inches 43.5 inches 43.5 inchesLSL-E51-2N035E 36 inches 36 inches 43.5 inches 43.5 inches

Instrument ID Final Tolerance Final Tolerance As-Found As-Found Tolerancefor Process for Process Tolerance for for Process SetpointSetpoint Setpoint (NEW) Process Setpoint (NEW)(CURRENT) (CURRENT)

LSLL-E41-1N002 ± 1.5 inches ± 1.0 inches ± 3.0 inches ± 2.0 inchesLSLL-E41-1N003 ± 1.5 inches ± 1.0 inches ± 3.0 inches ± 2.0 inchesLSLL-E41-2N002 ± 1.5 inches- ± 1.0 inches ± 3.0 inches ± 2.0 inchesLSLL-E41-2N003 ± 1.5 inches ± 1.0 inches ± 3.0 inches ± 2.0 inches

LSL-E51-1 N035A ± 1.5 inches ± 1.0 inches ± 3.0 inches ± 2.0 inchesLSL-E51-1 N035E ± 1.5 Inches ± 1.0 Inches ± 3.0 Inches ± 2.0 inchesLSL-E51-2NO35A ± 1.5 inches ± 1.0 inches ± 3.0 inches ± 2.0 inchesLSL-E51-2N035E ± 1.5 inches ± 1.0 inches ± 3.0 Inches ± 2.0 Inches

For InforrmatioA Only


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TABLE ! -"HPCI CST LOW LEVEL INSTRUMENT DATA EVALUATION

SurveillanceSetpolnt=43.5 Inches

Date12/11/20069/11/20066112/20064/4/2006

12/12/20059/12/20056/13/20053/28/200512/13/20049/13/20046/14/20043/15/200412/15/20039/15/20036116/20033117/2003

RangeMean

Std DevMean+2*sigMean-2*slgMean+3*sIgMean-3*slgz at 41.5"

Probability (41.56")

SI-152-308 S1-152-308 SI-252-308 SI-252-308

1N002 1N003 2N002 2N003As Found As Found As Found As Found

43.375 44 44.5 43.12543.625 44.125 44.5 43.2543.5 43.875 44.125 43.12543.5 44 44.25 43.543.5 44 44.5 43.25

43.5625 44 44.25 4343.4375 44 44.4375 43.37543.375 43.875 44.25 43.2543.625 44 44.375 4343.375 43.875 44.25 43.12543.5 44 44 4343.75 44.25 44.4375 43.2543.5 44 44.25 43

-44.125 44.5 44.375 43:37543.375 44 44.375 43.12543,375 43.625 44.125 43

0.75 0.875 0.543.53 44.01 44.310.19 0.19 0.15

43.92 44.38 44.6143.15 43.64 44.0144.11 44.56 44.7642.95 43.45 43.86

-10.56294 -13.5389 -18.793552.21 E-26 4.604E-42 4.263E-79

0.543.170.16

43.4942.8643.6442.70

-10.629371.087E-26

For Informhation Only


Page 10 of 15

TABLE 2 - RCIC CST LOW LEVEL INSTRUMENT DATA EVALUATION

SurveillanceSetpoint=43.5 Inches

Date12/11/20069/11/20066/12/20064/4/2006

12/12/20059/12/20056113/2G053/28/200512/13/20049/13/20046/3/2004

3/15/200412/15/20039/15/20036/16/20033/1712003

rangemean

std devmean+2*slgmean-2*slgmean+3*slgmean-3*slg

Z at 41.5Probability (041.5")

SI-150-315 SI-150-315 SI-250-315 SI-250-315

1N035AAs Found

42.7542.937542.87543.125

4343.187542.812542.75

434343

43.2542.75

43.312542.87542.875

0.562542.970.18

43.3242.6243.5042.44-8.31

4.85E-1 7

1N035EAs Found

43.542.87542.75

4342.87543.12542.87542.7542.87542.5

42.87543.125

42.643.5

42.7542.75

142.920.28

43.4842.3643.7642.08-5.09

1.79E-07

2N035AAs Found

43.543.2543.2543.2543.12543.2543.37543.2543.12543.2543.5

43.312543

43.187543.25

43

0.543.240.14

43.5342.9643.6742.82-12.24

9.08E-35

2N035EAs Found

43.2543.37543.2543.2543.375

43.312543.62543.37543.12543.25

4343.25

4343.187543.37542.375

1.2543.210.27

43.7542.6795

44.0242.40-11.22

1.16E-10



Page 11 of 15

Appendix A

Instrument Setting Design and Methodology for (LSLL-E41 (2) N002 and LSLL-E41-1(2)N003)

I. Allowable Value and Trip Setpoint for these Instruments

The mechanical portion of this calculation established the Allowable Value for the setpoint (seepage 4) as derived from calculation EC-052-1055. A similar value was calculated originally inBechtel calculation M-108-025 Rev 0 and was used to establish the Nominal Trip Setpoint of43.5" as implemented by welding the float chambers to the CST at SSES. At that time, a TechSpec Limit of 3' 4.5" or 40.5" was calculated. This is identical to the 40.5" Allowable Valuecalculated in this calculation. There is no .Analytical Value for this setpoint. An exemption fromspecific usage of the JDS-02 methodology is provided in the Tech Spec Bases Section B 3.3.5.1.This section of the Tech Spec Bases allows Allowable values for these instruments to be basedon system calculations and/or engineering judgment. Exemptions were taken for thesemechanical switches as well as timing relays. Since these instruments were exempt fromfollowing the JDS-02 methodology, the trip setpoint in TRM Table 2.2-1 and the allowable valuein Technical Specification Table 3.3.5.1-1 were assigned the same value. It has beendemonstrated that the actual process setpoints are adequately above the allowable value and tripsetpoint identified in technical specifications to ensure the instruments would actuate prior toreaching the allowable value. For EC's 823975 and 823991, the trip setpoint and allowable valuewill also be assigned the same value, namely 40.5 inches above tank bottom. There is notangible benefit to assigning a different value for the trip setpoint, as would typically be doneusing conventional setpoint methodology. Maintaining the trip setpoint and allowable value thesame is consistent with existing technical specifications, it is consistent with the existing RCICsystem level instruments and based on the: above discussion is considered acceptable in thisapplication.

The GE historical documentation related to the allowable value versus trip setpoint for theseinstruments has also been reviewed. GE specification 22A1362AW Rev. 9, Table I implies thatthe nominal trip setpoint should be assigned the same value as the allowable value for these levelinstruments, which is consistent with current plant technical specifications.

It. Setpoint Tolerances for these Level Instruments

GE historical documentation of level instrument setpoint tolerances has also been reviewed toestablish appropriate setpoint tolerances fir these instruments under EC's 823975 and 823991. Asummary of this review is provided below:

1. The Nominal Trip Setpoint appears to have come from GE in GE document 22A5261AK,Instrument Setpoints and Technical Specification Limits dated 4/23/1981. This was specificallywritten for Susquehanna I and 2. It also states, specifically, that if there are any conflictsbetween this document and any other document, the requirements of data sheet 22A5261AK

For Inforihation Only


Page 12 of 15

shall govern. Sheet 13 of GE document 22A5261AK provide the specifics for the Trip Function"Condensate Storage Tank Level - Low. It states that the Nominal Trip Setpoint should be "X +3 in.", where X is the Technical Specification Limit or Allowable Value. From the originalBechtel calculation M-108-025 Rev. 0. This was determined to be 40.5" and therefore thenominal Trip Setpoint is 43.5" in keeping with the original GE design. Footnote (d) to the valueexplains that "X" equals the value that ensures adequate Net Positive Suction Head (NPSH) forthe HPCI pump and no vortexing. In addition, this data sheet provides for a 1" accuracy, a 1"calibration accuracy, and a maximum design drift allowance of 1".

2. An earlier document, GE 22A1362AW Rev. 9, dated 8/7/72 provides different informationfor the instruments. On page 10 of the document it specifics a scale range of(+/-) 1", an accuracyof (+/-) 0.5", a calibration accuracy of (+/..) 0.25", a drift of (+/-) 0.5", a Nominal Trip Setpointof 0" and the Technical Specification Limit to be determined by the A/E. Footnote I on page 12of the document defines the Scale Range of the instrument as the minimum required range of themeasured variable or process to which the process sensing instruments and or trip devices are tobe calibrated. This document is considered to be outdated since at the time the document waswritten actual instrument capabilities were unknown. However, it is consistent with otherdocumentation in determining a Nominal 'Trip Setpoint of 0", meaning that this value and that ofthe Allowable Value are identical and also requiring a minimum calibration range of (+/-)1".Later when purchased, no drift number was specified for the blind switch. Since drift is partiallybased on calibration frequency, the number has no meaning without knowing calibrationfrequency. The statistical analysis of historical drift data provided in Revision 2 of thiscalculation provides more meaningful values.

3. GE document 23A9309AE dated 11/15/1999, after various PPL revisions, wasinvestigated. This document provides the details about the instruments as purchased. It showsthem to be blind mechanical float switches with an adjustable range of(+/-) 1". It also shows arequired adjustable range of(+/-) 2". It also shows the process fluid to be condensate, a designtemperature of 200 degrees F, a design pressure of 150 psig, a normal temperature of 100degrees F, and a rated accuracy of(+/-) of ¼% of the span. The vendor was Magnetrol with amodel number of 3.5-751-1X-MPG-M 14HY. The GE Purchase part drawing number is159C4294P002. It states that levels will be marked on the float chamber at 1" intervals forreference.

IlL. Statistical Analysis of Drift Data

This calculation analyzed the instrument actual drift data from 3/27/2003 until 12/11/2006.From this analysis it was determined that highest range over the entire period was (+) 0.875. Inaddition, the mean (-) 2 Std deviations was 43.15 for 1N002, 43.64 for 1N003, 44.01 for 2N002,and 42.86 for 2N003. Since our primary concern is keeping the low level setpoint above theAllowable value of 40.5" of H20, this data shows the closest approach to the Allowable Valueover the 3.75 year period was 2.36" for 2N003. The furthest from the Nominal Trip Setpoint of43.5 was 0.64" for 2N003 or approximately 1.5% of the setpoint. None of these valuesapproached the Allowable Value of 40.5".



Page 13 of 15

IV. Discussion with Maintenance:

A discussion was held with Bill Knecht of I&C Maintenance on 11/11/2008. Bill explained theactual calibration procedure used in SI-I (2)52-308. He explained that these are blind mechanicalswitches to which plastic tubing is attached and water level slowly lowered in the float chamberuntil the switch magnet releases, which tilts a mercury switch. He stated that he recommended anas-left tolerance of(+/-) 1".

Conclusion:

Based on both the documentation located on the original design basis of the mechanical switchrequiring a 1" calibration accuracy, the data sheet showing the purchase requirements ofadjustable range of (+/-) 1", the recommendation of experienced I&C Maintenance personnel,and the statistical analysis of the drift data; the tolerances for these mechanical blind switches areto be: As-found (+/-) 2" and As-left (+/-) 1". These tolerances are consistent with the originaldesign bases and ensure that the Allowable Value will not be approached during the surveillanceinterval.

For Inforffnation Only


Page 14 of 15

Appendix B

Instrument Setting Design and Methodology for (LSL-E511(2) N035A and LSL-E41-1(2)N035E)

I. Allowable Value and Trip Setpoint for these Instruments

As discussed above, the technical specification allowable value and the trip setpoint in the TRMfor these instruments are currently the same value, namely 36 inches above tank bottom. Asconcluded above, it is acceptable to leave the trip setpoint and allowable value the same for theselevel instruments. EC's 823975 and 823991 justifies that the existing value of 36 inches abovetank bottom is acceptable, therefore, no changes are required in the TRM or plant technicalspecifications for these level instruments.

II. Setpoint Tolerances for these Level Instruments

GE historical documentation of level instrument setpoint tolerances has been reviewed to helpestablish appropriate setpoint tolerances fur these instruments. GE design information for theRCIC float switches indicates that the RCIC float switches have exactly the same model number(3.5-751-IX-MPG-M14HY) as the HPCI float switches. An identical design for the RCIC andHPCI switches is shown on FF127250 Sh. 6801 Rev. 2, MI-E41-68 Rev. 2. The RCIC switchesare added to the drawing as E51-N0035AE. In addition, GE Document 2349310AE, or Ml-E51-91 Rev 11, Reactor Core Isolation Cooling System Instrument Data Sheets, page 16 showsidentical characteristics. The actual Nominal Trip Setpoint is shown on the Ready Data Sheet foreach instrument as 43.5". The Remarks Section of the Data Sheet states that trip points weremeasured from surveyor's marks on the level chamber.

Statistical Analysis of Drift Data

Revision 2 of this calculation analyzed the instrument actual drift data from 3/27/2003 until12/11/2006. From this analysis it was determined that highest range over the entire period was (-)1.125 from the setpoint of 43.5". In addition, the mean (-) 2 Std deviations was 42.62 for ESI -1N035A, 42.36 for E51-1N035E, 42.96 for E51-2N035A, and 42.68 for E51-2N035E. Since ourprimary concern is keeping the low level setpoint above the Allowable value of 36" of H20, thisdata shows the closest approach to the Allowable Value over the 3.75 year period was 9.36" forE51-1N035E. The furthest from the setpoint of 43.5 was 1.125" for E51-2N035E.. None of thesevalues approached the Allowable Value of 36".

Conclusion:

Based on both the documentation located on the original design basis of the mechanical switchrequiring a 1" calibration accuracy, the data sheet showing the purchase requirements ofadjustable range of (+/-) 1", the recommendation of experienced I&C Maintenance personnel,and the statistical analysis of the drift date; the tolerances for these mechanical blind switches areto be: As-found (+/-) 2" and As-left (+/-) I". These tolerances are consistent with the original

For Informnation Only


Page 15 of 15

design bases, the tolerances are consistent with the identical HPCI level instruments and thesetolerances ensure that the Allowable Value will not be approached during the surveillanceinterval.


PPL Quarterly Surveillance

Sl-152-308

For Inforfnation Only

PROCEDURE COVER SHEET

PPL SUSQUEHANNA, LLC PROCEDURE

QUARTERLY CALIBRATION OF CONDENSATE STORAGE TANK SI-152-308LOW LEVEL CHANNELS LSLL-E41 1 N002 AND LSLL-E41 -1 N003 Revision 10

Page 1 of 14

ADHERENCE LEVEL: STEP-BY-STEP (BY SECTION)

QUALITY CLASSIFICATION: APPROVAL CLASSIFICATION:

(X) QAProgram ( ) Non-QAProgram (X) Plant ( ) Non-Plant

( ) Instruction

EFFECTIVE DATE:

PERIODIC REVIEW FREQUENCY: N/A

..PERIODIC REVIEW DUE DATE: N/A

RECOMMENDED REVIEWS:

Procedure Owner: System 52 I&C Foreman

Responsible Supervisor: I&C Maint.-Production Supervisor

Responsible FUM: Manager-Nuclear Maintenance

Responsible Approver: Manager-Nuclear Maintenance

FORM NDAP-QA-0002-1, Rev. 4, Page 1 of 1 (Electronic Form)

For Informiation Only

SI-152-308Revision 10Page 2 of 14

TABLE OF CONTENTS

SECTION PAGE

1. PURPOSE/SCOPE 3

2. REFERENCES 3

3. SPECIAL TOOLS/EQUIPMENT 3

4. PRECAUTIONS 4

5. PREREQUISITES/LIMITATIONS 4

6. PROCEDURE 5

6.1 Calibration of LSLL-E41-1N002 5

6.2 Calibration of LSLL-E41-11N003 9

7. RECORDS 13

ATTACHMENTS

ATTACHMENT PAGE

A Data Form 14



PURPOSE/SCOPE

This procedure provides instructions for performing and documenting the QuarterlyCalibration of the Condensate Storage Tank Low Level Channels LSLL-E41 -1 N002 andLSLL-E41 -1 N003.

2. REFERENCES

2.1 SR 3.3.5.1.2, SR 3.3.5.1.3, SR 3.3.5.1.5, function 3.d

2.2 FSAR 7.3.1.1 a.1.3.7 - HPCI Instrumentation and Controls

(') 2.3 CR 97-0320 - Collection and Disposal of CST Water

2.4 IOM 305, Vol. VII, Part 1 - Emergency Core Cooling System

2.5 IOM 311, Vol I, Tab 29 - Magnetrol Model No. 3.5-751 MPG

2.6 E-152, Sheet 1 - HPCI System Control and Indication Block Diagram

2.7 E-152, Sheet 12 - HPCI Pump Suction From Condensate Storage Tank Valve 1'Schematic Diagram

2.8 E-152, Sheet 14 - HPCI Pump Suction From Suppression Pool Valve SchematicDiagram

2.9 M-1 08 - Condensate and Refueling Water Storage Piping and InstrumentDiagram

2.10 M-155 - HPCI Piping and Instrument Diagram

2.11 M1-E41-69 - HPCI Elemen'tary Diagram

(2) 2.12 Operability Follow-up Request 668320

3. SPECIAL TOOLS/EQUIPMENT

3.1 Required Measurement and Test Equipment (M&TE):

None

3.2 Additional Tools and Equipment:

3.2.1 Sight Glass/Tubing

3.2.2 1" Pipe Tee

For Inforimation Only


3.2.3 Additional Drain Valve

3.2.4 Multimeter/Continuity Tester

4. PRECAUTIONS

o] 4.1 I&C Supervision shall be notified if unexpected events or conditions areencountered during the performance of this procedure.

o 4.2 All water drained during this procedure may be radiologically contaminated. Thewater shall be Contained and Disposed of in accordance with Health Physicsdirections. (1)

5. PREREQUISITES/LIMITATIONS

o 5.1 Technical Specifications:

LSLL-1 N002

Instrument/Channel LSLL-1 N003

LCO 3.3.5.1

Function(s) 3.d

Mode(s) 1, 2(e), 3(e)

Me) With reactor steam ,dome pressure > 150 psig.

o 5.2 Plant Conditions:

o 5.2.1 In Modes 1, 2, and 3, the duration of each channel test may takeup to six hours, provided the associated function or the redundantfunction maintains ECCS initiation capability (referenceSR 3.3.5.1, NOTE 2).

5 5.2.2 Inform Shift Supervision if Allotted Performance Time (APT) isexceeded.

o 5.3 System Conditions:

o 5.3.1 Shift Supervision shall Confirm that LSLL-E41-1N002 andLSLL-E41-1N003 are in service.

(SS)CONFIRM

For Inforfnation Only


o 5.3.2 At Panel 1C601 (Control Room), Confirm annunciatorCONDENSATE STORAGE TANK LO WATER LEVEL(AR 114-E01) is OFF.

CONFIRM

6. PROCEDURE

o 6.1 Calibration of LSLL-E41-1N1002

O 6.1.1 Obtain Shift Supervision's concurrence to perform thesurveillance testing of LSLL-E41 -1 N002.

CAUTION

125 Vdc Is Present At The Links Opened In The Following Step.

o 6.1.2 At the local terminal box for LSLL-E41 -1 N002 (OT522A, Area 36,

Elevation 670'), Perform the following:

0 a. Ope. links 1 and 2.

o b. Connect a multimeter to the instrument side of terminals 1and 2.

o c. Observe OPEN contacts on the multimeter (infinite ohms).

o 6.1.3 At OT522A, Remove LSLL-E41 -1 N002 from service and Preparefor testing as follows:

o a. Close lower isolation valve IC-LSLL-E41 -1 N002 LOWER.

o b. Close upper isolation valve IC-LSLL-E41 -1 N002 UPPER.

o c. Remove'the drain test connection cap.

o d. Attach the test drain valve, tee, and sight glass toLSLL.-E41 -1 N002 drain test connection with sight glassadjacent to 43.5m benchmark.

e. Ensure the test drain valve is CLOSED.

f. Momentarily Open drain valve IC-LSLL-E41 -1 N002DRAIN to relieve any pressure on LSLL-E41 -1 N002.

For Information Only


o1 g. Remove the vent cap

0 h. Slowly Open vent valve IC-LSLL-E41 -1 N002 VENT.

0 i. Slowly Open drain valve IC-LSLL-E41 -1 N002 DRAIN andAllow water level in sight glass to stabilize.

o 6.1.4 Slowly Drain LSLL-E41-1 N002 using the test drain valve toobtain a channel trip (- 0 ohms on multimeter).

O 6.1.5 Record the As Found trip setting.

o] 6.1.6

EJ 6.1.7

o] 6.1.8

0]

0°0]

0

tD

(6.1.5). (6.1.9)

Setpoint (2) In. As Found FinalWC UL 46.5" UL 45.0"

LL 43.0" LL 43.0"

43.5 CD

Confirm the As Found trip setting is greater than or equal to theAllowable Value of 43" WC. (2)

YES/NO**

CONFIRM

IF the trip setting is within Final tolerance, Proceed to step 6.1.9.

Perform the following to adjust the setpoint:

a. Adjust the setpoint, as necessary, to bring the settingwithin Final tolerance.

b. Slowly Open lower isolation valve IC-LSLL-E41 -1 N002LOWER to raise the level in the sight glass.

c. Close the isolation valve when the trip resets.

d. Slowly Drain LSLL-E41 -1 N002, using the test drain valve,to obtain a channel trip (- 0 ohms on the multimeter).

e. Repeat step 6.1.8 until the trip setting is within Finaltolerance.

This step is Acceptance Criteria. Ifl "NO", see Required Action section of Data Form.

For Informfiation Only


O 6.1.9 Record the Final trip setting. Record LAF (Left As Found) if no

adjustments were made.

o 6.1.10 At OT522A, Return LSLL-E41-1 N002 to service:

a. Close instrument drain valve IC-LSLL-E41-1N002 DRAIN.

CONFIRM

o b. Drain the sight glass.

o c. Remove the test drain valve, tee, and sight glass.

O d. Cap the drain test connection.

CONFIRM

[e• Close vent valve IC-LSLL-E41-1 N002 VENT.

CONFIRM

o f.' Cap the vent test connection.

CONFIRM

-g. Slowly Open lower isolation valve valveIC-LSLL-E41-IN002 LOWER.

CONFIRM

o h. Slowly Open upper isolation valve IC-LSLL-E41 -1 N002UPPER.

CONFIRM

5 6.1.11 Confirm the channel is reset (multimeter indicates OPENcontacts, infinite ohms).

CONFIRM

For Inforination Only


Disconnect the multimeter at the local terminal box forLSLL-E41-11N002.

01 6.1.12

CAUTION

125 Vdc Is Present At The Links Closed In The Following Step.At te lcaltermnalboxforLSLLE41-1 002 Cloe te flloIng

13

11

6.1.13 At the local terminal box for LSLL-E41 -1 N002, Close the followinglinks:

a. Link 1

CONFIRM

01 b. Link 2

01 6.1.14

01

r0

0

CONFIRM

At OT522A (Area 36, Elevation 670'), Perform the followingINDEPENDENT VERIFICATION of Restoration forLSLL-E41-1N002:

a. Drain valve IC-LSLL-E41-1N002 DRAIN CLOSED.

IND VERIFY

b- Upper isolation valve IC-LSLL-E41-1N002 UPPER OPEN.

IND VERIFY

c. Lower isolation valve IC-LSLL-E41-1N002 LOWER OPEN.

IND VERIFY

d. Instrument vent valve IC-LSLL-E41 -1 N002 VENTCLOSED.

IND VERIFY



o e. At the local terminal box for LSLL-E41 -1 N002 Link 1CLOSED.

IND VERIFY

o f. At the local terminal box for LSLL-E41 -1 N002 Link 2CLOSED.

IND VERIFY

o 6.1.15 Inform Shift Supervision that the surveillance testing ofLSLL-E41 -1 N002 is complete and Acceptance Criteria have beenmet.

CONFIRM

o 6.2 Calibration of LSLL-E41-1N003

o 6.2.1 Obtain Shift Supervision's concurrence to perform thesurveillance testing of LSLL-E41 -1 N003.

CAUTION

125 Vdc Is Present At The Links Opened In The Following Step.

EO 6.2.2 At the local terminal box for LSLL-E41 -1 N003 (OT522A Area 36,Elevation 67:0'), Perform the following:

ol a. Open links 1 and 2.

O b. Connect a multimeter to the instrument side of terminals 1and 2.

o c. Observe OPEN contacts on the multimeter (infinite ohms)

o 6.2.3 At OT522A, Remove LSLL-E41 -1 N003 from service and Preparefor testing as follows:

o a. Close lower isolation valve IC-LSLL-E41-1N003 LOWER.

o b. Close upper isolation valve IC-LSLL-E41 -1 N003 UPPER.

Q c. Remove the drain test connection cap.

For Informnation Only


o d. Attach the test drain valve, tee, and sight glass toLSLL-E41 -1 N003 drain test connection with sight glassadjacent to 43.5" benchmark.

o e. Ensure the test drain valve is CLOSED.

o f. Momentarily Open drain valve IC-LSLL-E41 -1 N003DRAIN to relieve any pressure on LSLL-E41 -1 N003.

o g. Remove the vent cap

o3 h. Slowly Open vent valve IC-LSLL-E41-1N003 VENT.

o i. Slowly Open drain valve IC-LSLL-E41-1 N003 DRAIN andAllow water level in sight glass to stabilize.

0 6.2.4 Slowly Drain LSLL-E41 -1 N003 using the test drain valve toobtain a channel trip (- 0 ohms on multimeter).

o 6.2.5 Record the As Found trip setting.

(6.2.5) (6.2.9)

Setpoint (2) In. As Found FinalWC UL 46.5" UL 45.00

LL 43.0" LL 43.0"

143.5 CD

o 6.2.6 Confirm that the As Found trip setting is greater than or equal tothe Allowable Value of 43" WC (2).

YES/NO**CONFIRM

o 6.2.7 IF the trip setting is within Final tolerance, Proceed to step 6.2.9.

o3 6.2.8 Perform the following to adjust the setpoint:

O1 a. Adjust the setpoint, as necessary, to bring the settingwithin Final tolerance.

0 [b. Slowly Open lower isolation valve IC-LSLL-E41-1N003LOWER to raise the level in the sight glass.

** This step is Acceptance Criteria. It "NO", see Required Action section of Data Form.



o c. Close the isolation valve when the trip resets.,

o3 d. Slowly Drain LSLL-E41 -1 N003, using the test drain valve,to obtain a channel trip (- 0 ohms on the multimeter).

1 0 e. Repeat step 6.2.8 until the trip setting is within Finaltolerance.

O 6.2.9 Record the Final trip setting. Record LAF (Left As Found) if noadjustments were made.

o 6.2.10 At OT522A, Return LSLL-E41 -1 N003 to service:

0 a. Close drain valve IC-LSLL-E41 -1 N003 DRAIN.

CONFIRM

o b. Drain the sight glass.

ol c. Remove the test drain valve, tee, and sight glass.

o3 d. Cap the drain test connection.

CONFIRM

[] e. Close vent valve IC-LSLL-E41 -1 N003 VENT.

CONFIRM

f. Cap the vent test connection.

CONFIRM

9 g. Slowly Open lower isolation valve IC-LSLL-E41 -1 N003LOWER.

CONFIRM



10 h. Slowly Open upper isolation valve IC-LSLL-E41 -1 N003UPPER.

CONFIRM

0 6.2.11 Confirm the channel is reset (multimeter indicates OPENcontacts, infinite ohms).

CONFIRM

01 6.2.12 Disconnect the multimeter at the local terminal box forLSLL-E41 -1 N003.

CAUTION

125 Vdc Is Present At The Links. Closed In The Following Step.

13

11

6.2.13 At the local the terminal box for LSLL-E41 -1 N003, Close thefollowing links:

a. Link I

CONFIRM

01 b. Link 2

CONFIRM

At OT522A (Area 36, Elevation 670'), Perform the followingINDEPENDENT VERIFICATION of Restoration forLSLL-E41 -1 N003:

a. Drain valve IC-LSLL-E41-1N003 DRAIN CLOSED.

01 6.2.14

1 r'

IND VERIFY


jOjO

I10

SI- 152-308Revision 10Page 13 of 14

b. Upper isolation valve IC-LSLL-E41 -1 N003 UPPER OPEN.

IND VERIFY

c. Lower isolation valve IC-LSLL-E41-1N003 LOWER OPEN.

IND VERIFY

d. Instrument vent valve IC-LSLL-E41 -1 N003 VENTCLOSED.

IND VERIFY

A the local terminal box for LSLL-E41 -1 N003 Link 1CLOSED.

01 e.

0]

IND VERIFY

f. At the local terminal box for LSLL-E41 -1 N003 Link 2CLOSED.

IND VERIFY

Inform Shift Supervision that the surveillance testing ofLSLL-E41 -1 N003 is complete and Acceptance Criteria have beenmet.

CONFIRM

0 6.2.15

7. RECORDS

7.1 Forward the completed procedure package to I&C Supervision for initial review.

7.2 Upon completion of the review process, the completed package shall be storedby OCS.


Attachment ASI-152-308Revision 10Page 14 of 14

DATA FORM

REQUIRED ACTION (Acceptance Criteria not met)

Inform Shift Supervision (SS) that the Acceptance Criteria have not been met.

CONFIRM

NOTE: The following section is only applicable when the test is performed inMode 1, and in Modes 2 and 3 with reactor steam dome pressure'> 150psig.

CONDITION

LCO 3.3.5.1

CHANNEL

LSLL-E41 -1 N002

LSLL-E41-1 N003

APPLICABLE

YES/NO

YES/NO

CONFIRM

(SS).(ss)

REMARKS

MEASUREMENT AND TEST EQUIPMENT (M&TE)

None

Page 1 of 1


Limit Switch Manufacturer's Information

For Information Only *0

BULLETIN: 46-612

EFFECTIVE: APRIL 1976

SUPERSEDES: 46-701,46.718,46-719.:46-725 & 46-727

SERIAL-ED ON I

INSTR uCTiONi MANUALAND PARTS LISTMODEL.730 AND3751SERIES:.IQUID L.EVEL CONTROLS: Ll

:il:]

"NORMAL OPERATNGLEVEl"

D DESC RI PT.ON _ .The Magnetrol® 730 and 751 series level contrprimarily on applications in the petroleum arindustries. Usage includes level alarm, pumpsafety shut-dlown.,service on product storagescrubbers, process vessels and high: pressure sators. Three basic models make up the 730fourteen base models are included in the 751 serange of:::optional features are available forOther special: Imodelsin these series include ta751 units: with two switch mechanisms, eacha separate float ina special length float chambe730-X and 751-X models (not included in ticonstructed entirely of stainless steel.

OPERATING PRINCIPLEDiagrams A and B illustrate the simple andMagnetrol .operating principle. Switching actionthrough the use of a magnetic attracting sleevby a float, and a switching mechanism. Thesicomponent assemblies are separated by a no

S:--.WVVIrqU IN . .. -SWING OUT:.":"••:iPOSITIONi It::::l . \ POSITION. r

( I I :1:I I:: : :• 1 h l I : : i . i :: . : :

.... . . .

I LOW LE~VEL"

.. Y :DIAGRAM B3

FIG. I

ols are used pressure' tight. enclosing tube. A switch and magnet arend chen'ical ' assembled to a swinging arm' which operates on precisioncontrol and stainless steel pivot sockets.

.tanks, gas ......team •gner- OPERATING CYCLEseries while At "Normal Operating Level"': of liquid in the chamber

ries. A wide (diagram "A"), the .float moves the magnetic attracting

all models. sleeve upward in the enclosing tube and into the field of the'andem 'Wpe' switch mechanism magnet. As a result, the magnet is drawn

operated by - in tightly to the enclosing:tube causing the switch to tilt,rr as well as "making" or."breaking" an electrical circuit. As liquid level

his manual) recedes, the float pulls the magnetic attracting sleeve down-

ward until, at.a predetermined ".Low Level" (diagram "B"),

the switch magnet releases and is drawn outward awayfrom the enclosing. tube by a tension spring. This in turn

d-foolproof tilts the switch. in an opposite direction, thus reversing

is obtained switch action.

ce, actuated When liquid level returns to normal,- the float monce again

e two basic moves the magnetic attracting sleeve up the enclosing tube,n-magnetic, causing the switch to assume its original. position.

I1 MAGNETROL

INSTALLATION

PIPINGFigure 2 shows a typical piping installation of a Magnetrol730 or 751 series control to a pressure vessel. Referencemark on float chamber should be aligned to corres;pondwith liquid level in vessel at which switch control is desired.(refer to dimensional drawing, if furnished, or catalog data).

Use pipe of sufficient strength to support the control. Ifnecessary, provide a stand or hanger to help support itsweight. All piping should be straight and free of "lowspots" or "pockets" so that lower liquid line will draintowards the vessel and upper vapor line will drain towardthe control. Shut-off valves are recommended for instal-lation between vessel and the float chamber of the control.If control is to be used with a low temperature liquid (onewhich will "boil" in the float chamber if outside heat isabsorbed), the chamber and piping should be insulated.Such boiling in the chamber will cause false level indi-cations. Do NOT insulate switch mechanism housing.

For high pressure controls with pressure equalized selfpurging floats, a %" equalizer line may be required fromthe vapor space above the highest level reached by theliquid in the pressure vessel (as shown). A needle typevalve is recommended for the equalizer line. If no higheropening'is available in the vessel, line should be connectedback to the control vapor line, as indicated.

NOTE: If pressure vessel is placed into and removed fromservice by slowly raising and lowering pressure while,liquid is below control, the equalizing line may beomitted.

On controls equipped with pneumatic switch assemblies,consult bulletin on mechanism furnished for air (or gas)piping instructions.

MOUNTINGAdjust piping as required to bring control to a verticalposition. Magnetrol controls must be mounted within three(30) degrees of vertical. A three degree slant is noticeableby eye, but installation should be checked with a spiritlevel on top and/or sides of float chamber.

TYPICAL PIPING ARRANGEMENT

Equalizer Line withNeedle Type Valve-.•t.....

IIIII

l~l IIn uit IIitlet II• II

(I[I14

FIG. 2

NOTE: See one of the following bulletins furnished withyour control for proper connections.

SWITCH MECHANISM REF.(Model Suffix Number) BULLETIN TYPE

S-1 & DPS-1 Mercury Switches 42-608 S-iJ-1 Bleed Type Pneumatic Valve 42-617 J-1J-2 Non-Bleed Type Pneumatic Valve 42-621 J-2

1 .~-

Controls should be mounted as close to the vessel aspossible. This will result in a more responsive and accuratelevel change in the control. Liquid in a long line may becooler and more dense than liquid in the vessel causinglower level indication in the control than actual level inthe vessel.

;,- I Iti vi Ury Contact Switcnes q:Z-tb, /

M-1 & MA Anti-Vibration Dry Contact Switches 42-670 M-t/M-4

SPS-1 &SPDPS-1 Anti-Vibration MercurySw. 42-675 S-1

S-1 & DPS-1 High Temperature Mercury Sw. 42-676 S-1

SPS-1 &SPDPS-1 Hi-TempAnti-Vibration Mercury 42-677 S-1

S-1 M &DPS-1 M Hi-Temp Dry Contact Switches 42-678 S-1

WIRINGMost all 730 and 751 control switch housings are designedto allow 3600 positioning of the conduit outlet by looseningthe set screw(s) located under the housing base. On hightemperature applications (above 2500F. in float chamber),asbestos covered, wire should be used between control andfirst junction box located in a cooler area. On non-hazardousapplications, flexible conduit may be used between controland first junction box. Conduit should have sufficientslack to permit removal of switch housing assembly.

1. To gain access to switch mechanism(s) remove switchhousing cover.

2. Pull in supply wires (conductors), wrap them aroundenclosing tube under the baffle plate and connect toproper terminals. Be certain that excess wire does notinterfere with "tilt" of switch and that adequate clear-ance exists for replacement of switch housing cover.

3. Connect power supply to control and test switch actionby varying liquid level in float chamber.

NOTE: If switch mechanism fails to function properly,check vertical alignment of control housing and consultinstallation bulletin on switch mechanism furnished.

4. Replace switch housing cover aJ place control intoservice.

If control' has been furnished with an explosion proof(cast) or moisture proof (gasketed) switch housing, checkthe following:

1. After wiring connections have been completed, housingsmust be sealed at the conduit outlet with a suitablecompound or "dope" to prevent entrance of air.

2. Check cover to base fit to be certain gasketed joint istight. A positive seal is necessary to prevent infiltrationof moisture laden air or corrosive gases into switchhousings.

STANDARD® DIIFFERENTIAL ADJUSTMENT

Slight Play (Gap)Must Be Allowed(1/32" Typical)

Position of Bottom Jam Nuts(Normal Factory Setting) [

-a--. Remove Top Jam Nuts, Washerand Attracting Sleeve for Access

to Bottom Jam Nuts.

Replace in Same Position---/

Drop Bottom Jam Nuts/to Increase Gap Setting(See Instructions Below)t

'I

DIAGRAM A

NORMAL FACTORY SETTING(Minimum Differential)

CAUTION: After increasing gap setting, becertain to check for proper operation ofswitch mechanism by raising and loweringfloat assembly. Magnet must "snap" cleanlywith additional float movement availableafter magnet snaps.

,2, Maximum2 Gap Setting

(Applies to Models Having aSingle Switch Mechanism witha Single Magnet Actuator Only!)

1J

L

I It I

I -_-= =

DIAGRAM B

DIFFERENTIAL ADJUSTMENT

4.

/

Float

FIG. 3

The amount of level travel between "switch-on" and"switch-off" actuations (differential) may be field adjusted

_bv-repasitionig-he-lower-jam--nAt&-en--the-lffoaem--•m.The-

standard factory setting is for a minimum amount of play,(gap) between the top jam nuts and the attracting sleevelas shown in diagram "A" above. This setting may beincreased to a maximum of 1", as shown in diagram "B".

NOTE: For assistance in computing level differential changefor a specific control, consult the factory giving Modeland Serial number of the co.ntrol.

With level change specifications determined, proceed asfollows:

CAUTION: Before attempting any work on the control,be certain to pull disconnect switch or otherwise deter-mine that electrical circuit(s) through control is de-energized.

1. Disconnect wiring from supply side of switch mecha-nism(s) and remove electrical conduit or operatingmedium line connections to switch housing.

2. Perform system shut-down as required to relieve pressurefrom float chamber of control and allow unit to cool.

- Close shut-off valves (if so equipped) to isolate controlfrom vessel. Drain off liquid in chamber, if required.

FIG.3

- On applications or installations without shut-offvalves, relieve pressure from, vessel and drain off liquid

__'-"nd~fabove-tont r omomrnhig-re-ve1

NOTE: Control chamber, connections and pipe lines neednot be removed from vessel.

3. Remove switch housing assembly by loosening hex nutlocated immediately below housing base (See Fig. 4).

4. With switch housing removed, jam nuts and attractingsleeve are accessible. Measure position of upper jam nutsfrom stem end, then loosen and remove upper jam nuts,guide washer and attracting sleeve.

5. Loosen and adjust lower jam nuts to desired position.Make certain jam nuts are tightened securely.

6. Reassemble control in reverse of steps 1 through 4making certain upper jam nuts are locked in originalposition.

NOTE: Use new gasket in assembly of switch housing to

chamber.

7. Test switch actuation by varying liquid level in vessel.

0Instructions given are for standard Magnetrol controls only - not. for models specifically tailored to special customer specifications.


List of Regulatory Commitments

Attachment 4 to PLA-6501Page 1 of 1

LIST OF REGULATORY COMMITMENTS

The following table identifies those actions committed to by PPL Susquehanna in thisdocument. Any other statements in this submittal are provided for information purposesand are not considered to be regulatory commitments.Please direct questions regarding this commitment to Mr. Duane L. Filchner

REGULATORY COMMITMENT ~Due Da~te/EventThis one time action will be

PPL will follow the efforts of the Technical Specification completed within 6 months ofTask Force (TSTF) and NRC to finalize the details and approval of the TSTF -493scope of changes needed to resolve the instrument Traveler.setpoint issue discussed in RIS-2006-17. If theCondensate Storage Tank (CST) Level-Low function isaffected by the approved version of TSTF-493 "ClarifyApplication of Setpoint Methodology for LSSSFunctions," then PPL will submit a separate amendmentrequest to implement the approved generic change for theCST Level-Low allowable value.