ML091200616

Attachment 1 to PLA-6501, Calculation EC-037-001

ML091200616
Person / Time
Site:	Susquehanna
Issue date:	11/25/2008
From:	White A Susquehanna
To:	Office of Nuclear Reactor Regulation
References
PLA-06501 EC-037-1001
Download: ML091200616 (39)

Text

Attachment 1 to PLA-6501 PPL Calculation EC-037-001

For Infortatiol Only PCAF #2007-1057 Page 9 of 10 NUCLEAR ENGINEERING CALCULATION COVER SHEET NEPM-QA-0221-1 1. Page 1 of 15 Total 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 SUPERSEDED BY: N/A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 to support 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 * -

Print Name (EG771 Quaificatlon Required) bate'

>17. Reviewed by':

PrintName (EG771 QualfltcatlonRequired) S1 bate

>18. Verified by:

Print Name (EG771& QADR Qualification Required) Signat~e 'Date

>19. Approved by:

PR W~v. .r;4 Print Name (Qualifiedper NEPM-OA-0241 and U Signature Date comply with Section 7.8 of tiEPM-QA-0221)

>20. Accepted by:

PrintName (EG771 QualificationRequired) and Signature Date comply 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 Fields FORM NEPM-QA-0221-1, Revision 10, Page 1 of 1, ELECTRONIC FORM > REQUIRED FIELDS

For Inforrhatiori Only Page la 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[ FULL REVISION El SUPERSEDED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 Description PagesPgsd d pI mv of Revision on the Listed Pages El Q

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

For Inforrhatiori Only Page lb TECHNICAL CHANGE

SUMMARY

PAGE NEPM-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 the scope of verification if the calculation was verified. It should not be more than one page. Its purpose is to provide summary information to the reviewer, verifier, approver, and acceptor about the technical purpose of the change. For non-technical revisions, state the purpose or reason for the revision.

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

Scope of Verification (If verification applies): Scope of verification applies only to changes made in this 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-037-1001 Revision 3 Page 2 of 15 OBJECTIVE:

Document the basis for the process setpoint for the HPCI and RCIC automatic suction transfer from the Condensate Storage Tank (CST) and to document the basis for the technical specification allowable value 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 normally aligned to the CST. Note however that the suppression pool is the safety related source of water for this system. The HPCI and RCIC systems provide makeup water to the RPV during accident conditions. The system will automatically transfer from the CST to the suppression pool when level in the CST reaches the suction transfer setpoint. Level switches gire provided In the CST to initiate the automatic suction transfer to the suppression pool. The switches must be set high enough to ensure adequate NSPH to the pumps and to prevent unacceptable vortex formation in the suction piping to ensure pump operation is not compromised during the transfer.

The switches which accomplish the suction transfer from the CST to the suppression pool for the HPCI system 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 RCIC system are:

LSL-E51 -1N035A LSL-E51-2N035A LSL-E51 -1N035E 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 667984667984 the existing technical specification allowable value for a HPCI system CST low level transfer was found to be inadequate and results In possibility of vortex formation in the HPCI suction line from the CST during the transfer process, if the transfer were to occur at the current technical specification allowable value (36 inches above tank bottom). Once a suction transfer is initiated, the level in the CST will continue to drop until the suction transfer Is completed. The previous revision of this calculation (EC-037-1001, Rev. 1) did not adequately account for the stroke times of the HPCI suction valves to complete the suction transfer.

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

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

For Inforrhation Only Calculation EC-037-1001 Revision 3 Page 3 of 15 HPCI system and document the basis acceptability of the existing technical specification allowable value for the RCIC system. This calculation revision will also evaluate acceptability of the existing process setpoints and setpolnt tolerances required to support the low CST level transfer changes for both the RCIC and HPCI systems. This calculation revision will also address impacts of the required tech spec and 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 HPCVRCIC Systems"

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 667984667984- 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 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 PRESSURE COOLANT INJECTION SYSTEM

16. GE Document 22A5261AK Rev. 0, INFORMATION DOCUMENT DATA SHEET ON INSTRUMENT 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 PART LEVEL SWITCH GENERAL USE

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

For Inforrhation Only Calculation EC-037-1001 Revision 3 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 such that the HPCI Suppression Pool Suction Valve and the HPCI Condensate Storage Tank Suction Valve operate in parallel, rather than in series. Under the current transfer logic, upon initiation of a HPCI automatic suction transfer on low CST level, the suppression pool suction valve (HV1(2)55F042) will go full 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 suction transfer logic such that the HPCI Suppression Pool Suction Valve and the HPCI Condensate Storage Tank Suction Valve operate simultaneously, rather than in series. This change will prevent the potential for unacceptable vortex formation in the HPCI suction line during a HPCI automatic suction transfer from the CST to the Suppression Pool. Vortex fomatlon in the suction lines would introduce air in the line and potentially render the HPCI pump inoperable. Operating the HPCI suction valves in parallel will speed up the 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 suction transfer from the CST to the suppression pool Is initiated prior to CST level reaching 40.5 inches above the tank bottom, there will be no unacceptable vortex formation in the HPCI and RCIC suction lines during the transfer process and these systems would remain fully functional throughout and following a suction transfer. Therefore, the existing technical specification allowable value for the HPCI CST low level transfer (Table 3.3.5.1-1) will be increased from 2:36 Inches to > 40.5 inches (more conservative direction) above tank bottom in support of the.se EC's. The evaluation also assumes the RCIC automatic suction transfer from the CST occurs at the existing technical specification allowable value of 36 inches from tank bottom. Therefore, this evaluation also documents acceptability of the existing technical specification allowable value for the RCIC automatic suction transfer from the CST. The evaluation assumes both HPCI and RCIC systems in service at maximum flow conditions since HPCI and RCIC systems share a common CST suction line. The analysis (EC-052-1055) is conservative since it does not credit the vortex breaker installed inside the CST at the HPCI/RCIC suction nozzle. Itshould be-noted that direct determination of a technical specification allowable value by means of a calculation is not consistent with the conventional methodology described in JDS-02 (Reference 13), but it is consistent with the original design basis for these level Instruments and it is consistent with Technical Specification Bases 3.3.5.1, which states that "the allowable values for these level instruments are based on system calculations and/or engineering judgment which establishes a conservative limit at which the function should occur. Itshould also be noted that exceptions to the conventional instrument setpoint methodology are allowed per JDS-02 (Reference 13), provided justification for deviation from the recommended practice is provided. The justification for the new technical specification allowable values and the corresponding instrument process selpointlprocess setpoint tolerances is provided herein.

See Appendices A and B for further detail.

It is demonstrated Inthis 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 below the Allowable Value. This is accomplished through a statistical evaluation of historical data obtained from surveillance of these instruments. Since for this particular case, the variation of the actual instrument trip setpoint Is well understood based on a significant history of plant surveillance data, and also due to the simple design of the mechanical float switches, this approach Is more reliable than the conventional methodology presented in JDS-02, which relies on constituent uncertainties that are not well defined for these instruments.

Instrument surveillance data for both the RCIC and HPCI level switches has been evaluated over the past 4 years and is summarized in Tables 1 and 2. The following conclusions have been reached based on the 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

For Inforrhation Only Calculation EC-037-1001 Revision 3 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 found as low as 41.5 inches (1 inch above the Allowable Value) during calibration check. Therefore, the only reasonable way that the setpoint could drop to this level would be if the instrument were damaged or broken. It should be noted that in this case, the redundant level instrument would be available to perform the required transfer function.

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

Based on conservatisms used in the flow-model evaluation (EC-052-1055) and the fact that (based on a review of historical data and the simple design of the switches) these mechanical level instruments are highly accurate and exhibit very little drift, the ,Alowable Value and the Trip Setpoint are taken to be the same value. The allowable value Identified in Technical Specification Table 3.3.5.1 and the Trip Setpoint identified 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 from the tank bottom. This setpoint is fixed by the location at which the switches are installed on the tank. The proposed EC's maintain the current Instrument Process Setpolnt of 43.5 inches, which eliminates the need to modify the tank and relocate the switches. Since the minimum height for the suction transfer to initiate Is changing from 36 Inches above tank bottom for the HPCI system to 40.5 inches above tank bottom, there will be a net reduction in margin between the Process Setpoint and the technical specification 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 instruments is +/- 3 inches. Since there is a net reduction in margin between the allowable value and the process setpoint, this tolerance is excessive. Although not physically possible based on the simple design of the mechanical float switches, the current as-found tolerance would theoretically allow the setpoint to drift down to the Allowable Value, which is not acceptable since that would leave no margin to account for instrument accuracy. Consequently, a new sel:point tolerance, which more closely relates to the instrument 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 existing Instrument setpoint tolerances can be tightened to be more representative of actual instrument performance. The data shows that the maximum deviation in measured setpoint from the Process Setpoint 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-left instrument tolerance from +/- 1.5 inches to +/- 1.0 inches. In addition, this evaluation supports a reduction In the 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 HPCI technical 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 level instruments.

For Informhation Only Calculation EC-037-1001 Revision 3 Page 6 of 15 These changes are consistent with the supplemental setpoint tolerance evaluations provided in Appendices A and B.

Note also that redundant instruments are used in this application, so that ifthe setpoint were to drift excessively because an instrument was damaged or broken, the other instrument would be available to perform the required transfer function.

Based on the historical data review and the proposed Process Setpoint tolerance changes, it is concluded that there is adequate margin between the Process Setpoint and the new Allowable Value for the HPCI level instruments. Even though the technical specification Allowable Value for the RCIC system level instruments (36 inches) is not being changed, the setpoint tolerance changes will be applied to the RCIC Instrumentation as well, since these tolerances are more representative and appropriate for the actual level instrument 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 assumed to be two feet below the CST suction i!ransfer level in the existing NPSH calculations. The NSPH available to the HPCIpump will not decrease with the HPCI suction valves stroking in parallel during a suction transferfrom the CST to the suppression pool, as documented in EC-052-1055.

Forthe HPCIsystem, the technical specification allowable value for the low level transferis increasingfrom 36 inches to 40.5 inches, therefore the NPSH available to the HPCIpump at the technical specificationallowable value will be greater. For the RCIC system no changes are being-made that would adversely impact NPSH available to-the RCIC pumps. The actual instrument setpoints (43.5 inches from tank bottom) are not being changed by this EC.

Therefore, the HPCIand RCIC pump NPSH requirementsare not adversely affected by this change.

2. The CST's were originally designed to provide a minimum storage capacity of 135,000 gallons for the RCIC and HPCI pumps associated with each unit. The 135,000 gallon reserve volume requirements were based on a GE Guideline which calculates the reserve volume based on the RPV inventory loss due to boil off rate in the reactor for an 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> Integrated decay heat factor (DBD041).

As documented in EC-037-0501 Revision 1, the 135,000 reserve volume discussed in the FSAR and DBDO04 equates to the dedicated volume availablein the CST down to the top of the HCI/RCIC suction nozzle. This dedicated volume was established as part of the originaltank design, based on the originalGE guideline to size the CST reserve volume to support 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of decay heat removal and, as such, remains unchanged. The CST reserve volume available following implementation of EC82397.5 and EC823991 was evaluated in EC-037-0501 and was found to be adequate to fully support RCIC and HPCI operation at final EPU conditions.

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

The reserve CST volume is credited in ATWS, Appendix R and SBO evaluations. As documented in EC-037-0501, the reserve volume available in the CST following implementation of 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 HPCI and RCIC system operation.

For Inforrhation Only Calculation EC-037-1001 Revision 3 Page 7 of 15 Potential Technical Speclflcation Impacts:

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

Allowable Value: > 36" above tank bottom A change will be requiredto Table 3.3.5.1-1 to change the technicalspecification allowable value for a HPCI automatic suction transfer from the CST. A technical specificationchange will be processedunder EC 823975 and EC 823991 to change the technical specificationallowable value from 36 inches to 40.5 inches above tank bottom. Justificationfor this change is provided in 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 the instrument 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 current value of> 36 inches above tank bottom to > 40.5 inches above tank bottom. Justificationfor this change is provided in this calculationand the Modification Safety Assessment for EC 823975 and EC 823991.

3. Technical specification Surveillance requirement 3.5.2.1 and 3.5.2.2require verification that either the suppression pool level is a 20 feet or that the Core Spray system is aligned to take suction from 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 associated piping, 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 vales operating In series as presently designed.

A change will be requiredto Section 3.3.5.1 in the technical specificationbases to incorporate the HPCIautomatic transferlogic changes from series operationto paralleloperationper EC 823975 and EC 823991.

CONCLUSION:

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

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

For Inforrmation Only Calculation EC-037-1001 Revision 3 Page 8 of 15 New setpoint tolerances were established based on the documentation of the original design basis of the mechanical switch requiring a 1"calibration accuracy, the data sheet showing the purchase requirements of an adjustable range of (+/-)l", the recommendation of experienced I&C Maintenance personnel, and a statistical analysis of the drift data. See Appendices A and B for further detail. These instrument data are more representative of actual instrument performance. These tolerances provide adequate margin to the revised technical specification allowable value for the HPCI system. The setpoint tolerance changes will be implemented for the RCIC system instrumentation as well, since these instruments are identical to the HPCI instruments.

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

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

(CURRENT) Trip Setpoint (NEW)

LSLL-E41 -1N002 36 Inches 40.5 Inches 43.5 Inches 43.5 inches LSLL-E41 -1N003 36 inches 40.5 Inches 43.5 Inches 43.5 inches LSLL-E41-2N002 36 inches 40.5 inches 43.5 inches 43.5 inches LSLL-E41-2N003 36 inches 40.5 inches 43.5 inches 43.5 inches LSL-E51 -1N035A 36 inches 36 inches 43.5 inches 43.5 inches LSL-E51-1 N035E 36 inches 36 inches 43.5 inches 43.5 inches LSL-E51-2N035A 36 inches 36 inches 43.5 inches 43.5 inches LSL-E51-2N035E 36 inches 36 inches 43.5 inches 43.5 inches Instrument ID Final Tolerance Final Tolerance As-Found As-Found Tolerance for Process for Process Tolerance for for Process Setpoint Setpoint Setpoint (NEW) Process Setpoint (NEW)

(CURRENT) (CURRENT)

LSLL-E41-1N002 +/- 1.5 inches +/- 1.0 inches +/- 3.0 inches +/- 2.0 inches LSLL-E41-1N003 +/- 1.5 inches +/- 1.0 inches +/- 3.0 inches +/- 2.0 inches LSLL-E41-2N002 +/- 1.5 inches- +/- 1.0 inches +/- 3.0 inches +/- 2.0 inches LSLL-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 inches LSL-E51-1 N035E +/- 1.5 Inches +/- 1.0 Inches +/- 3.0 Inches +/- 2.0 inches LSL-E51-2NO35A +/- 1.5 inches +/- 1.0 inches +/- 3.0 inches +/- 2.0 inches LSL-E51-2N035E +/- 1.5 inches +/- 1.0 inches +/- 3.0 Inches +/- 2.0 Inches

For InforrmatioA Only Calculation EC-037-1001 Revision 3 Page 9 of 15 TABLE ! -"HPCI CST LOW LEVEL INSTRUMENT DATA EVALUATION Surveillance SI-152-308 S1-152-308 SI-252-308 SI-252-308 Setpolnt=43.5 Inches 1N002 1N003 2N002 2N003 Date As Found As Found As Found As Found 12/11/2006 43.375 44 44.5 43.125 9/11/2006 43.625 44.125 44.5 43.25 6112/2006 43.5 43.875 44.125 43.125 4/4/2006 43.5 44 44.25 43.5 12/12/2005 43.5 44 44.5 43.25 9/12/2005 43.5625 44 44.25 43 6/13/2005 43.4375 44 44.4375 43.375 3/28/2005 43.375 43.875 44.25 43.25 12/13/2004 43.625 44 44.375 43 9/13/2004 43.375 43.875 44.25 43.125 6/14/2004 43.5 44 44 43 3/15/2004 43.75 44.25 44.4375 43.25 12/15/2003 43.5 44 44.25 43 9/15/2003 -44.125 44.5 44.375 43:375 6116/2003 43.375 44 44.375 43.125 3117/2003 43,375 43.625 44.125 43 Range 0.75 0.875 0.5 0.5 Mean 43.53 44.01 44.31 43.17 Std Dev 0.19 0.19 0.15 0.16 Mean+2*sig 43.92 44.38 44.61 43.49 Mean-2*slg 43.15 43.64 44.01 42.86 Mean+3*sIg 44.11 44.56 44.76 43.64 Mean-3*slg 42.95 43.45 43.86 42.70 z at 41.5" -10.56294 -13.5389 -18.79355 -10.62937 Probability (41.56") 2.21 E-26 4.604E-42 4.263E-79 1.087E-26

For Informhation Only Calculation EC-037-1001 Revision 3 Page 10 of 15 TABLE 2 - RCIC CST LOW LEVEL INSTRUMENT DATA EVALUATION Surveillance SI-150-315 SI-150-315 SI-250-315 SI-250-315 Setpoint=43.5 Inches 1N035A 1N035E 2N035A 2N035E Date As Found As Found As Found As Found 12/11/2006 42.75 43.5 43.5 43.25 9/11/2006 42.9375 42.875 43.25 43.375 6/12/2006 42.875 42.75 43.25 43.25 4/4/2006 43.125 43 43.25 43.25 12/12/2005 43 42.875 43.125 43.375 9/12/2005 43.1875 43.125 43.25 43.3125 6113/2G05 42.8125 42.875 43.375 43.625 3/28/2005 42.75 42.75 43.25 43.375 12/13/2004 43 42.875 43.125 43.125 9/13/2004 43 42.5 43.25 43.25 6/3/2004 43 42.875 43.5 43 3/15/2004 43.25 43.125 43.3125 43.25 12/15/2003 42.75 42.6 43 43 9/15/2003 43.3125 43.5 43.1875 43.1875 6/16/2003 42.875 42.75 43.25 43.375 3/1712003 42.875 42.75 43 42.375 range 0.5625 1 0.5 1.25 mean 42.97 42.92 43.24 43.21 std dev 0.18 0.28 0.14 0.27 mean+2*slg 43.32 43.48 43.53 43.75 mean-2*slg 42.62 42.36 42.96 42.6795 mean+3*slg 43.50 43.76 43.67 44.02 mean-3*slg 42.44 42.08 42.82 42.40 Z at 41.5 -8.31 -5.09 -12.24 -11.22 Probability (041.5") 4.85E-1 7 1.79E-07 9.08E-35 1.16E-10

For Inforrhation Only Calculation EC-037-1001 Revision 3 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 (see page 4) as derived from calculation EC-052-1055. A similar value was calculated originally in Bechtel calculation M-108-025 Rev 0 and was used to establish the Nominal Trip Setpoint of 43.5" as implemented by welding the float chambers to the CST at SSES. At that time, a Tech Spec Limit of 3' 4.5" or 40.5" was calculated. This is identical to the 40.5" Allowable Value calculated in this calculation. There is no .Analytical Value for this setpoint. An exemption from specific 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 based on system calculations and/or engineering judgment. Exemptions were taken for these mechanical switches as well as timing relays. Since these instruments were exempt from following the JDS-02 methodology, the trip setpoint in TRM Table 2.2-1 and the allowable value in Technical Specification Table 3.3.5.1-1 were assigned the same value. It has been demonstrated that the actual process setpoints are adequately above the allowable value and trip setpoint identified in technical specifications to ensure the instruments would actuate prior to reaching the allowable value. For EC's 823975 and 823991, the trip setpoint and allowable value will also be assigned the same value, namely 40.5 inches above tank bottom. There is no tangible benefit to assigning a different value for the trip setpoint, as would typically be done using conventional setpoint methodology. Maintaining the trip setpoint and allowable value the same is consistent with existing technical specifications, it is consistent with the existing RCIC system level instruments and based on the: above discussion is considered acceptable in this application.

The GE historical documentation related to the allowable value versus trip setpoint for these instruments has also been reviewed. GE specification 22A1362AW Rev. 9, Table I implies that the nominal trip setpoint should be assigned the same value as the allowable value for these level instruments, 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 to establish appropriate setpoint tolerances fir these instruments under EC's 823975 and 823991. A summary 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 specifically written for Susquehanna I and 2. It also states, specifically, that if there are any conflicts between this document and any other document, the requirements of data sheet 22A5261AK

For Inforihation Only Calculation EC-037-1001 Revision 3 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 original Bechtel calculation M-108-025 Rev. 0. This was determined to be 40.5" and therefore the nominal Trip Setpoint is 43.5" in keeping with the original GE design. Footnote (d) to the value explains that "X" equals the value that ensures adequate Net Positive Suction Head (NPSH) for the 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 information for the instruments. On page 10 of the document it specifics a scale range of(+/-) 1", an accuracy of (+/-) 0.5", a calibration accuracy of (+/..) 0.25", a drift of (+/-) 0.5", a Nominal Trip Setpoint of 0" and the Technical Specification Limit to be determined by the A/E. Footnote I on page 12 of the document defines the Scale Range of the instrument as the minimum required range of the measured variable or process to which the process sensing instruments and or trip devices are to be calibrated. This document is considered to be outdated since at the time the document was written actual instrument capabilities were unknown. However, it is consistent with other documentation in determining a Nominal 'Trip Setpoint of 0", meaning that this value and that of the 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 partially based on calibration frequency, the number has no meaning without knowing calibration frequency. The statistical analysis of historical drift data provided in Revision 2 of this calculation provides more meaningful values.

3. GE document 23A9309AE dated 11/15/1999, after various PPL revisions, was investigated. This document provides the details about the instruments as purchased. It shows them to be blind mechanical float switches with an adjustable range of(+/-) 1". It also shows a required adjustable range of(+/-) 2". It also shows the process fluid to be condensate, a design temperature of 200 degrees F, a design pressure of 150 psig, a normal temperature of 100 degrees F, and a rated accuracy of(+/-) of 1/4%of the span. The vendor was Magnetrol with a model number of 3.5-751-1X-MPG-M 14HY. The GE Purchase part drawing number is 159C4294P002. It states that levels will be marked on the float chamber at 1" intervals for reference.

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. In addition, 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 the Allowable value of 40.5" of H20, this data shows the closest approach to the Allowable Value over the 3.75 year period was 2.36" for 2N003. The furthest from the Nominal Trip Setpoint of 43.5 was 0.64" for 2N003 or approximately 1.5% of the setpoint. None of these values approached the Allowable Value of 40.5".

For Inforihation Only Calculation EC-037-1001 Revision 3 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 the actual calibration procedure used in SI-I (2)52-308. He explained that these are blind mechanical switches to which plastic tubing is attached and water level slowly lowered in the float chamber until the switch magnet releases, which tilts a mercury switch. He stated that he recommended an as-left tolerance of(+/-) 1".

Conclusion:

Based on both the documentation located on the original design basis of the mechanical switch requiring a 1" calibration accuracy, the data sheet showing the purchase requirements of adjustable 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 are to be: As-found (+/-) 2" and As-left (+/-) 1". These tolerances are consistent with the original design bases and ensure that the Allowable Value will not be approached during the surveillance interval.

For Inforffnation Only Calculation EC-037-1001 Revision 3 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 TRM for these instruments are currently the same value, namely 36 inches above tank bottom. As concluded above, it is acceptable to leave the trip setpoint and allowable value the same for these level instruments. EC's 823975 and 823991 justifies that the existing value of 36 inches above tank bottom is acceptable, therefore, no changes are required in the TRM or plant technical specifications for these level instruments.

II. Setpoint Tolerances for these Level Instruments GE historical documentation of level instrument setpoint tolerances has been reviewed to help establish appropriate setpoint tolerances fur these instruments. GE design information for the RCIC 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 and HPCI switches is shown on FF127250 Sh. 6801 Rev. 2, MI-E41-68 Rev. 2. The RCIC switches are 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 shows identical characteristics. The actual Nominal Trip Setpoint is shown on the Ready Data Sheet for each instrument as 43.5". The Remarks Section of the Data Sheet states that trip points were measured 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 until 12/11/2006. 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 our primary concern is keeping the low level setpoint above the Allowable value of 36" of H20, this data shows the closest approach to the Allowable Value over the 3.75 year period was 9.36" for E51-1N035E. The furthest from the setpoint of 43.5 was 1.125" for E51-2N035E.. None of these values approached the Allowable Value of 36".

Conclusion:

Based on both the documentation located on the original design basis of the mechanical switch requiring a 1" calibration accuracy, the data sheet showing the purchase requirements of adjustable 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 are to be: As-found (+/-) 2" and As-left (+/-) I". These tolerances are consistent with the original

For Informnation Only Calculation EC-037-1001 Revision 3 Page 15 of 15 design bases, the tolerances are consistent with the identical HPCI level instruments and these tolerances ensure that the Allowable Value will not be approached during the surveillance interval.

to PLA-6501 PPL Quarterly Surveillance Sl-152-308

For Inforfnation Only PROCEDURE COVER SHEET PPL SUSQUEHANNA, LLC PROCEDURE QUARTERLY CALIBRATION OF CONDENSATE STORAGE TANK SI-152-308 LOW 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-152-308 Revision 10 Page 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

For Inforihation Only SI-152-308 Revision 10 Page 3 of 14 PURPOSE/SCOPE This procedure provides instructions for performing and documenting the Quarterly Calibration of the Condensate Storage Tank Low Level Channels LSLL-E41 -1 N002 and LSLL-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 Schematic Diagram 2.9 M-1 08 - Condensate and Refueling Water Storage Piping and Instrument Diagram 2.10 M-155 - HPCI Piping and Instrument Diagram 2.11 M1-E41 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 SI-152-308 Revision 10 Page 4 of 14 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 are encountered during the performance of this procedure.

o 4.2 All water drained during this procedure may be radiologically contaminated. The water shall be Contained and Disposed of in accordance with Health Physics directions. (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 take up to six hours, provided the associated function or the redundant function maintains ECCS initiation capability (reference SR 3.3.5.1, NOTE 2).

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

o 5.3 System Conditions:

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

(SS)

CONFIRM

For Inforfnation Only SI-152-308 Revision 10 Page 5 of 14 o 5.3.2 At Panel 1C601 (Control Room), Confirm annunciator CONDENSATE 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 the surveillance testing of LSLL-E41 -1N002.

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 1 and 2.

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

o 6.1.3 At OT522A, Remove LSLL-E41 -1N002 from service and Prepare for 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 to LSLL.-E41 -1N002 drain test connection with sight glass adjacent to 43.5m benchmark.

e. Ensure the test drain valve is CLOSED.

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

For Information Only SI-152-308 Revision 10 Page 6 of 14 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 and Allow water level in sight glass to stabilize.

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

O 6.1.5 Record the As Found trip setting.

(6.1.5). (6.1.9)

Setpoint (2) In. As Found Final WC UL 46.5" UL 45.0" LL 43.0" LL 43.0" 43.5 CD o] 6.1.6 Confirm the As Found trip setting is greater than or equal to the Allowable Value of 43" WC. (2)

YES/NO**

CONFIRM EJ 6.1.7 IF the trip setting is within Final tolerance, Proceed to step 6.1.9.

o] 6.1.8 Perform the following to adjust the setpoint:

0] a. Adjust the setpoint, as necessary, to bring the setting within Final tolerance.

0° b. Slowly Open lower isolation valve IC-LSLL-E41 -1N002 LOWER to raise the level in the sight glass.

0] c. Close the isolation valve when the trip resets.

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

tD e. Repeat step 6.1.8 until the trip setting is within Final tolerance.

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

For Informfiation Only SI-152-308 Revision 10 Page 7 of 14 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 valve IC-LSLL-E41-IN002 LOWER.

CONFIRM o h. Slowly Open upper isolation valve IC-LSLL-E41 -1 N002 UPPER.

CONFIRM 5 6.1.11 Confirm the channel is reset (multimeter indicates OPEN contacts, infinite ohms).

CONFIRM

For Inforination Only SI-152-308 Revision 10 Page 8 of 14 01 6.1.12 Disconnect the multimeter at the local terminal box for LSLL-E41-11N002.

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

At te lcaltermnalboxforLSLLE41-1 002 Cloe te flloIng 13 6.1.13 At the local terminal box for LSLL-E41 -1 N002, Close the following links:

11 a. Link 1 CONFIRM 01 b. Link 2 CONFIRM 01 6.1.14 At OT522A (Area 36, Elevation 670'), Perform the following INDEPENDENT VERIFICATION of Restoration for LSLL-E41-1N002:

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

IND VERIFY r0 b- Upper isolation valve IC-LSLL-E41-1N002 UPPER OPEN.

IND VERIFY

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

IND VERIFY 0 d. Instrument vent valve IC-LSLL-E41 -1N002 VENT CLOSED.

IND VERIFY

For Inforination Only SI-152-308 Revision 10 Page 9 of 14 o e. At the local terminal box for LSLL-E41 -1 N002 Link 1 CLOSED.

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

IND VERIFY o 6.1.15 Inform Shift Supervision that the surveillance testing of LSLL-E41 -1 N002 is complete and Acceptance Criteria have been met.

CONFIRM o 6.2 Calibration of LSLL-E41-1N003 o 6.2.1 Obtain Shift Supervision's concurrence to perform the surveillance testing of LSLL-E41 -1N003.

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 1 and 2.

o c. Observe OPEN contacts on the multimeter (infinite ohms) o 6.2.3 At OT522A, Remove LSLL-E41 -1N003 from service and Prepare for testing as follows:

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

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

Q c. Remove the drain test connection cap.

For Informnation Only SI-152-308 Revision 10 Page 10 of 14 o d. Attach the test drain valve, tee, and sight glass to LSLL-E41 -1 N003 drain test connection with sight glass adjacent to 43.5" benchmark.

o e. Ensure the test drain valve is CLOSED.

o f. Momentarily Open drain valve IC-LSLL-E41 -1 N003 DRAIN 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 and Allow water level in sight glass to stabilize.

0 6.2.4 Slowly Drain LSLL-E41 -1N003 using the test drain valve to obtain 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 Final WC 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 to the 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 setting within Final tolerance.

0[b. Slowly Open lower isolation valve IC-LSLL-E41-1N003 LOWER to raise the level in the sight glass.

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

For Information Only SI-152-308 Revision 10 Page 11 of 14 o c. Close the isolation valve when the trip resets.,

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

10 e. Repeat step 6.2.8 until the trip setting is within Final tolerance.

O 6.2.9 Record the Final trip setting. Record LAF (Left As Found) if no adjustments 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 9g. Slowly Open lower isolation valve IC-LSLL-E41 -1 N003 LOWER.

CONFIRM

For Inforination Only SI-152-308 Revision 10 Page 12 of 14 10 h. Slowly Open upper isolation valve IC-LSLL-E41 -1N003 UPPER.

CONFIRM 0 6.2.11 Confirm the channel is reset (multimeter indicates OPEN contacts, infinite ohms).

CONFIRM 01 6.2.12 Disconnect the multimeter at the local terminal box for LSLL-E41 -1N003.

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

13 6.2.13 At the local the terminal box for LSLL-E41 -1N003, Close the following links:

11 a. Link I CONFIRM 01 b. Link 2 CONFIRM 01 6.2.14 At OT522A (Area 36, Elevation 670'), Perform the following INDEPENDENT VERIFICATION of Restoration for LSLL-E41 -1 N003:

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

1 r' IND VERIFY

For Information Only SI- 152-308 Revision 10 Page 13 of 14

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

jO jO IND VERIFY

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

IND VERIFY I10 d. Instrument vent valve IC-LSLL-E41 -1 N003 VENT CLOSED.

IND VERIFY 01 e. A the local terminal box for LSLL-E41 -1 N003 Link 1 CLOSED.

IND VERIFY 0] f. At the local terminal box for LSLL-E41 -1 N003 Link 2 CLOSED.

IND VERIFY 0 6.2.15 Inform Shift Supervision that the surveillance testing of LSLL-E41 -1N003 is complete and Acceptance Criteria have been met.

CONFIRM

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 stored by OCS.

For Information Only Attachment A SI-152-308 Revision 10 Page 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 in Mode 1, and in Modes 2 and 3 with reactor steam dome pressure'> 150 psig.

CONDITION CHANNEL APPLICABLE CONFIRM LCO 3.3.5.1 LSLL-E41 -1N002 YES/NO .(ss)

(SS)

LSLL-E41-1 N003 YES/NO REMARKS MEASUREMENT AND TEST EQUIPMENT (M&TE)

None Page 1 of 1

Attachment 3 to PLA-6501 Limit Switch Manufacturer's Information

• 0 For Information Only BULLETIN: 46-612 EFFECTIVE: APRIL 1976 SERIAL

-ED ON I SUPERSEDES: 46-701,46.718,46-719.:

46-725 & 46-727 INSTR uCTiONi MANUALAND PARTS LIST MODEL.730 AND3751SERIES:.

IQUID L.EVEL CONTROLS: Ll

il:]

S:--.WVVIrqU IN . .. -SWING OUT

.":"**:iPOSITIONi It::::l . \ POSITION. r (I I :1:I  : :* 1 h lI:: I : : i . i :: . : :

"NORMAL OPERATNG LEVEl" I LOW LE~VEL"

.. Y

DIAGRAM B3 FIG. I DESC D RI PT.ON . _

The Magnetrol 730 and 751 series level contr ols are used pressure' tight. enclosing tube. A switch and magnet are primarily on applications in the petroleum ar nd chen'ical ' assembled to a swinging arm' which operates on precision industries. Usage includes level alarm, pump control and stainless steel pivot sockets.

safety shut-dlown.,service on product storage .tanks, gas ......

scrubbers, process vessels and high: pressure steam *gner- OPERATING CYCLE ators. Three basic models make up the 730 series while At "Normal Operating Level"': of liquid in the chamber fourteen base models are included in the 751 se ries. A wide (diagram "A"), the .float moves the magnetic attracting range of:::optional features are available for all models. sleeve upward in the enclosing tube and into the field of the' Other special: Imodelsin these series include taandem 'Wpe' switch mechanism magnet. As a result, the magnet is drawn 751 units: with two switch mechanisms, each operated by - in tightly to the enclosing:tube causing the switch to tilt, a separate float ina special length float chambe rr as well as "making" or."breaking" an electrical circuit. As liquid level 730-X and 751-X models (not included in tihis manual) recedes, the float pulls the magnetic attracting sleeve down-constructed entirely of stainless steel. ward until, at.a predetermined ".Low Level" (diagram "B"),

the switch magnet releases and is drawn outward away OPERATING PRINCIPLE from the enclosing. tube by a tension spring. This in turn Diagrams A and B illustrate the simple andd-foolproof tilts the switch. in an opposite direction, thus reversing Magnetrol .operating principle. Switching action is obtained switch action.

through the use of a magnetic attracting sleev ce, actuated When liquid level returns to normal,- the float monce again by a float, and a switching mechanism. Thesie two basic moves the magnetic attracting sleeve up the enclosing tube, component assemblies are separated by a no n-magnetic, causing the switch to assume its original. position.

I1MAGNETROL

INSTALLATION PIPING TYPICAL PIPING ARRANGEMENT Figure 2 shows a typical piping installation of a Magnetrol 730 or 751 series control to a pressure vessel. Reference Equalizer Line with mark on float chamber should be aligned to corres;pond Needle Type Valve-.*t (I

with liquid level in vessel at which switch control is desired. [I (refer to dimensional drawing, if furnished, or catalog data).

II 14 Use pipe of sufficient strength to support the control. If III necessary, provide a stand or hanger to help support its weight. All piping should be straight and free of "low l~l II n uit II spots" or "pockets" so that lower liquid line will drain itlet II towards the vessel and upper vapor line will drain toward

• II the 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 (one which will "boil" in the float chamber if outside heat is absorbed), 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 self purging floats, a %" equalizer line may be required from the vapor space above the highest level reached by the liquid in the pressure vessel (as shown). A needle type valve is recommended for the equalizer line. If no higher opening'is available in the vessel, line should be connected back to the control vapor line, as indicated.

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

On controls equipped with pneumatic switch assemblies, consult bulletin on mechanism furnished for air (or gas) FIG. 2 piping instructions.

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

MOUNTING SWITCH MECHANISM REF.

Adjust piping as required to bring control to a vertical (Model Suffix Number) BULLETIN TYPE position. Magnetrol controls must be mounted within three S-1 & DPS-1 Mercury Switches42-608 S-i (30) degrees of vertical. A three degree slant is noticeable J-1 Bleed Type Pneumatic Valve 42-617 J-1 by eye, but installation should be checked with a spirit level on top and/or sides of float chamber. J-2 Non-Bleed Type Pneumatic Valve 42-621 J-2 1 .~-

,- I Iti vi Ury Contact Switcnes q

Z-tb, /

Controls should be mounted as close to the vessel as M-1 & MA Anti-Vibration Dry Contact Switches42-670 M-t/M-4 possible. This will result in a more responsive and accurate level change in the control. Liquid in a long line may be SPS-1 &SPDPS-1 Anti-Vibration MercurySw.42-675 S-1 cooler and more dense than liquid in the vessel causing S-1 & DPS-1 High Temperature Mercury Sw.42-676 S-1 lower level indication in the control than actual level in SPS-1 &SPDPS-1 Hi-TempAnti-Vibration Mercury 42-677 S-1 the vessel. S-1 M &DPS-1 M Hi-Temp Dry Contact Switches42-678 S-1 WIRING 3. Connect power supply to control and test switch action by varying liquid level in float chamber.

Most all 730 and 751 control switch housings are designed to allow 3600 positioning of the conduit outlet by loosening NOTE: If switch mechanism fails to function properly, the set screw(s) located under the housing base. On high check vertical alignment of control housing and consult temperature applications (above 2500F. in float chamber), installation bulletin on switch mechanism furnished.

asbestos covered, wire should be used between control and 4. Replace switch housing cover aJ place control into first junction box located in a cooler area. On non-hazardous service.

applications, flexible conduit may be used between control If control' has been furnished with an explosion proof and first junction box. Conduit should have sufficient (cast) or moisture proof (gasketed) switch housing, check slack to permit removal of switch housing assembly. the following:

1. To gain access to switch mechanism(s) remove switch 1. After wiring connections have been completed, housings housing cover. must be sealed at the conduit outlet with a suitable

2. Pull in supply wires (conductors), wrap them around compound or "dope" to prevent entrance of air.

enclosing tube under the baffle plate and connect to 2. Check cover to base fit to be certain gasketed joint is proper terminals. Be certain that excess wire does not tight. A positive seal is necessary to prevent infiltration interfere with "tilt" of switch and that adequate clear- of moisture laden air or corrosive gases into switch ance exists for replacement of switch housing cover. housings.

STANDARD DIIFFERENTIAL ADJUSTMENT 4.

Slight Play (Gap)

Must Be Allowed -a--. Remove Top Jam Nuts, Washer (1/32" Typical) and Attracting Sleeve for Access ,2, Maximum 2 Gap Setting to Bottom Jam Nuts.

(Applies to Models Having a Replace in Same Position---/ Single Switch Mechanism with a Single Magnet Actuator Only!) /

Position of Bottom Jam Nuts (Normal Factory Setting) [ Drop Bottom Jam Nuts/

to Increase Gap Setting (See Instructions Below)t L

CAUTION: After increasing gap setting, be certain to check for proper operation of 1J switch mechanism by raising and lowering float assembly. Magnet must "snap" cleanly I I

'I t I with additional float movement available after magnet snaps.

I -_-= =

DIAGRAM A Float DIAGRAM B NORMAL FACTORY SETTING DIFFERENTIAL ADJUSTMENT (Minimum Differential)

FIG. 3 The amount of level travel between "switch-on" and - On applications or installations without shut-off "switch-off" actuations (differential) may be field adjusted valves, relieve pressure from, vessel and drain off liquid

_bv-repasitionig-he-lower-jam--nAt&-en--the-lffoaem--*m.The- __'-"nd~fabove-tontr omomrnhig-re-ve1 FIG.3 standard factory setting is for a minimum amount of play, (gap) between the top jam nuts and the attracting sleevel NOTE: Control chamber, connections and pipe lines need as shown in diagram "A" above. This setting may be not be removed from vessel.

increased to a maximum of 1", as shown in diagram "B". 3. Remove switch housing assembly by loosening hex nut NOTE: For assistance in computing level differential change located immediately below housing base (See Fig. 4).

for a specific control, consult the factory giving Model

4. With switch housing removed, jam nuts and attracting and Serial number of the co.ntrol.

sleeve are accessible. Measure position of upper jam nuts With level change specifications determined, proceed as from stem end, then loosen and remove upper jam nuts, follows: guide washer and attracting sleeve.

CAUTION: Before attempting any work on the control, 5. Loosen and adjust lower jam nuts to desired position.

be certain to pull disconnect switch or otherwise deter- Make certain jam nuts are tightened securely.

mine that electrical circuit(s) through control is de- 6. Reassemble control in reverse of steps 1 through 4 energized. making certain upper jam nuts are locked in original position.

1. Disconnect wiring from supply side of switch mecha-nism(s) and remove electrical conduit or operating NOTE: Use new gasket in assembly of switch housing to medium line connections to switch housing. chamber.

2. Perform system shut-down as required to relieve pressure 7. Test switch actuation by varying liquid level in vessel.

from float chamber of control and allow unit to cool.

- Close shut-off valves (if so equipped) to isolate control 0Instructions given are for standard Magnetrol controls only - not from vessel. Drain off liquid in chamber, if required. . for models specifically tailored to special customer specifications.

Attachment 4 to PLA-6501 List of Regulatory Commitments

Attachment 4 to PLA-6501 Page 1 of 1 LIST OF REGULATORY COMMITMENTS The following table identifies those actions committed to by PPL Susquehanna in this document. Any other statements in this submittal are provided for information purposes and are not considered to be regulatory commitments.

Please direct questions regarding this commitment to Mr. Duane L. Filchner REGULATORY COMMITMENT ~Due Da~te/Event This one time action will be PPL will follow the efforts of the Technical Specification completed within 6 months of Task Force (TSTF) and NRC to finalize the details and approval of the TSTF -493 scope of changes needed to resolve the instrument Traveler.

setpoint issue discussed in RIS-2006-17. If the Condensate Storage Tank (CST) Level-Low function is affected by the approved version of TSTF-493 "Clarify Application of Setpoint Methodology for LSSS Functions," then PPL will submit a separate amendment request to implement the approved generic change for the CST Level-Low allowable value.