RS-25-129, Response to Request for Additional Information Related to License Amendment Request for Clinton Power Station to Approve a Methodology for Testing MSIV Closure RPS Response Time

Response to Request for Additional Information Related to License Amendment Request for Clinton Power Station to Approve a Methodology for Testing MSIV Closure RPS Response Time

ML25225A226
Person / Time
Site:	Clinton
Issue date:	08/13/2025
From:	Humphrey M AmerGen Energy Co, Constellation Energy Generation
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
RS-25-129, EPID L-2025-LLA-0099
Download: ML25225A226 (1)

Text

4300 Winfield Road Warrenville, IL 60555 630 657 2000 Office RS-25-129 August 13, 2025 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Clinton Power Station, Unit 1 Facility Operating License No. NPF-62 NRC Docket N0. 50-461

Subject:

Response to Request for Additional Information Related to License Amendment Request for Clinton Power Station to Approve a Methodology for Testing MSIV Closure RPS Response Time

References:

1.

Letter from M. D. Humphrey (Constellation Energy Generation, LLC) to U.S. NRC, "License Amendment Request for Proposed Change to the USAR to Approve Alternate Method of Verifying MSIV Closure Reactor Protection System Response Time," dated June 26, 2025 (ADAMS Accension No. ML25177C292)

2.

Email from B. Wetzel (U.S. NRC) to N. Lien (Constellation Energy Generation, LLC, Final RAI - Clinton Power Station, Unit 1 - A Proposed Change to the USAR to Approve Alternate Method of Verifying MSIV Closure RPS Response Time (EPID No. L-2025-LLA-0099), dated August 6, 2025 In Reference 1, in accordance with 10 CFR 50.90, "Application for amendment of license, construction permit, Constellation Energy Generation, LLC (CEG) requested an amendment to Facility Operating License No. NPF-62 for Clinton Power Station. The proposed amendment would permit a USAR change that will allow for an NRC-approved methodology for MSIV-Closure Reactor Protection System (RPS) response time testing.

Constellation

August 13, 2025 U.S. Nuclear Regulatory Commission Page 2 In Reference 2, the NRC requested additional information that is needed to complete a review of the license amendment request. In response to this request, CEG is providing the attached information.

CEG has reviewed the information supporting the finding of No Significant Hazards Consideration, and the Environmental Consideration, that were previously provided to the NRC in Reference 1. The additional information provided in this submittal does not affect the bases for concluding that the proposed license amendment does not involve a significant hazards consideration. In addition, the information provided in this submittal does not affect the bases for concluding that neither an environmental impact statement nor an environmental assessment needs to be prepared in connection with the proposed amendment.

There are no regulatory commitments contained in this letter. Should you have any questions concerning this letter, please contact Nick Lien at (779) 231-6283.

I declare under the penalty of perjury that the foregoing is true and correct. Executed on the 13th day of August 2025.

Respectfully, Mark Humphrey Sr. Manager Licensing Constellation Energy Generation, LLC

Attachment:

Response to Request for Additional Information cc:

Regional Administrator-NRC Region III NRC Senior Resident Inspector - Clinton Power Station Illinois Emergency Management Agency - Department of Nuclear Safety and Homeland Security

Humphrey, Mark D.

Digitally signed by Humphrey, Mark D.

Date: 2025.08.13 13:15:17 -05'00' A

ATTACHMENT Response to Request for Additional Information By application dated June 26, 2025 (Agencywide Documents Access and Management System(ADAMS) Accession No. ML25177C292), Constellation Energy Generation, LLC (CEG; the licensee) submitted a license amendment request (LAR) for Clinton Power Station. The proposed amendment would permit a USAR change that will allow for an NRC-approved methodology for MSIV-Closure Reactor Protection System (RPS) response time testing.

The U.S. Nuclear Regulatory Commission (NRC) staff determined that the following information is needed to complete its review.

RAI-1

Regulatory Basis Appendix A to Title 10 of the Code of Federal Regulations, Part 50 (10 CFR 50), General Design Criterion (GDC) 13, Instrumentation and Control, requires that instrumentation shall be provided to monitor variables and systems over their anticipated ranges for normal operation, for anticipated operational occurrences, and for accident conditions as appropriate to assure adequate safety, including those variables and systems that can affect the fission process, the integrity of the reactor core, the reactor coolant pressure boundary, and the containment and its associated systems. Appropriate controls shall be provided to maintain these variables and systems within prescribed operating ranges.

10 CFR 50.36, Technical Specifications paragraph (c)(3), states that surveillance requirements are requirements relating to test, calibration, or inspection to assure that the necessary quality of systems and components is maintained, that facility operation will be within safety limits, and that the limiting conditions for operation will be met.

Issue In the LAR the licensee states that the RPS MSIV Closure Trip calibration surveillance requirement SR 3.3.1.1.13 test can reveal possible deterioration of the snap-acting limit switch, such as sluggish behavior (e.g., slow movement or sticking), which could preclude an RPS trip within the TS 3.3.1.1-1 required allowable limits.

The LAR included a commitment to revise CPS procedures 9431.10 (A through H), but did not include its specific procedure steps.

ATTACHMENT Response to Request for Additional Information Request To reach a reasonable assurance determination that the proposed Clinton RPS MSIV Closure Trip Response Time methodology will be effective, the staff needs to review the proposed instructions within at least one of the licensees revised CPS procedures 9431.10 (A through H) for the RPS Main Steam Line Isolation Valve channel calibrations.

Please provide at least one of the proposed revised calibration surveillance procedures (assuming the instructions are identical for all RPS MSIV Inboard and Outboard Limit Switches) showing that:

1. Adequate instructions have been included for CPS maintenance and engineering personnel to reasonably observe, identify, and document/record any observations regarding the onset or degree of any observed snap-acting limit switch sluggish behavior which could have the potential to preclude an RPS trip within the TS 3.3.1.1-1 allowable limits (both setpoint and response time), such that any potential degradation of the switch performance during calibration and from one calibration to the next calibration can be readily identified. If there are any metrics or procedural steps that can be used to repeatably record such degradation, such metrics or steps are also identified within the procedure.

2. Adequate instructions are included to record the trend of as-found data for the MSIV valve stem closure percentage travel over the course of time, to enable maintenance and engineering personnel to have a basis for evaluating whether the limit switch performance is degrading over time.

Response

Procedures 9431.10 (A through H) for RPS Main Steamline Isolation Valve Channel Calibration have been revised to include the items listed in the commitment made in License Amendment Request. Procedure 9431.10H is attached to this letter as an example, and the applicable definition and instructions are on pages 3 (section 2.2), 14 (step 8.1.15), and 19 (step 8.3.10).

CPS 9431. lOH RPS MAIN STEAMLINE ISOLATION VALVE B21-F028D CHANNEL CALIBRATION SCOPE OF REVISION:

Revison to add step 8. 1. 15 Bullet 1 to look for sluggish response during MSIV stroke. PCRA# 4878399-02 [Jim LoPresto]

I LIIVIII I-CONTINUOUS USE I Rev.

2 Page 1 of 25

CPS 9431.l0H 1.0 PURPOSE 1.1 To provide instructions for performance of a channel calibration of the Reactor Protection System (RPS) Main Steamline Isolation Valve (MSIV) Outboard B21-F028D as specified in CPS ITS SR 3.3.1.1.13 T6.

1. 2 Performance of this procedure satisfies the functional test requirements of ITS SR 3.3.1.1.9 T6 1. 3 This procedure also partially satisfies the Logic System Functional requirements of SR 3.3.1.1.15 T6 and SR 3.3.1.1.17 T6 for these MSIV channels.

1.4 ISI Program - Partial Exercise of MSIV's 2.0 DISCUSSION/DEFINITIONS 2. 1 Discussion 2.1.1 2.1.2 2.1.3 2. 1. 4 Rev.

2 Frequency:

<<LBD-1, LBD-2>>

1.

Normal Frequency in accordance with the Surveillance Frequency Control Program (SFCP).

2.

Other Triggers -

Any maintenance that may disturb limit switch setpoint.

This procedure includes steps necessary to perform the Channel Calibration of the instrument channel up to the point where this channel converges with other channels.

This procedure also checks the logic associated with the Main Steam Line (MSL)

D BYPASS switch operation.

This procedure is only performed during Operational Condition 4 or 5 due to the prerequisite that the REACTOR SYSTEM MODE switch is NOT in RUN position.

This channel provides trip signals to the Reactor Protection System logic.

This procedure also includes steps necessary to perform the individual instrument calibrations needed to restore the channel to the loop specifications.

The components in the loop are as follows:

Loop D Limit Switch on Valves Annunciator B21-F028D Window 3-C Computer Point B21NC050 V-112-781 H13-P680-05A (5004)

Page 2 of 25

Rev.

2. 1. 5 CPS 9431.l0H Performance of this procedure satisfies the requirements of CPS 9031.10, RPS Main Stearn Line Isolation Valve Channel Functional 2. 2 Definitions Sluggish Response of snap-acting limit switch -

switch operates with an indication of delay in switch response or erratic electrical indications.

3. 0 RESPONSIBILITY The Manager -

Instrument Maintenance Department (IMO) shall be responsible for the implementation and review of this procedure.

4.0 PRECAUTIONS 4.1 Close proximity to the moving parts on the MSIV is necessary to perform this procedure.

Extreme care should be exercised to avoid personnel injury during valve movement.

4. 2 Improper implementation of this procedure could result in a scram initiation signal to occur.

Ensure that performance of this channel calibration does not satisfy any 2/4 logic functions which would cause unwanted responses (refer to stepS.11).

4. 3 Do not reuse pipe plug.

When removing or installing a pipe plug, care shall be taken to restrain the assembled operating lever so the applied torque is not transmitted to the switch shaft.

2 Page 3 o f 25

5. 0 5. 1 5. 2 5. 3 Rev.

2 CPS 9431.l0H PREREQUISITES Verify calibration due-date of test equipment to be used to ensure calibrations up-to-date.

Establish Communications between the Main Control Room (MCR) and the Turbine Building Main Steam Tunnel V-110-762 (jack G17) for performance of Sections 8.1, 8.2, 8.3 and 8.4.

In conjunction with Shift Management, review the following impact statements and referenced Operability Impacts to determine required plant status to perform this test:

OPERABILITY IMPACTS CPS ITS LCO 3.3.1.1, Reactor Protection System (RPS)Instrumentation, Table 3.3.1.1-1, item:

6. Main Steam Line Isolation Valve - Closure INITIAL CPS ITS LCO 3.3.6.1, Primary Containment and Drywell Isolation Instrumentation, Table 3.3.6.1-1, item:

1. Main Steam Line Isolation d) Condenser Vacuum -

Low OTHER SYSTEMS AFFECTED -

IF Condenser Vacuum NOT being simulated, THEN Condenser Low Vacuum Bypass Switches for all divisions will be placed in BYPASS to override Low Condenser Vacuum Trip Signal.

Annunciators:

DIV 1 OR 4 MSIV CL TRIP [5004-3C]

DIV 2 OR 3 MSIV CL TRIP [5005-3C]

MAIN CONDENSER LOW VACUUM BYPASS (5067-4E)

MAIN CONDENSER LOW VACUUM BYPASS (5066-4E)

Computer Points:

B21NC050 RPS TRIP -

Yes, Reactor Scram CRVICS ISOLATION -

No Impact Page 4 of 25

CPS 9431.l0H 5.3 (cont'd)

LOGIC TYPE -

2/4, One Inboard MSIV Switch or One Outboard MSIV Switch on the same steam line constitutes one input to the 2 out of 4 logic.

Any 2 inputs to the 2 out of 4 logic will cause a SCRAM.

COINCIDENT CHANNELS TO PREVENT ACTUATION None: MSIV closure scram is bypassed with the mode switch in SHUTDOWN position.

PLANT/SYSTEM CONDITIONS ASSUMED FOR TEST:

This procedure is only performed during operational condition 4 or 5.

Able to Open MSIVs I

SMngt Performer 5. 4 Obtain Shift Management permission (Initials, Date and Time) prior to performing this test.

I DATE TIME SMngt 5. 5 Operations:

IF Condenser Vacuum NOT being simulated, THEN Verify MSL D BYPASS switch is in INITIAL NORM [50678].

IV I

5. 6 Rev.

2 Operations:

Verify Reactor System Mode switch i s NOT in RUN [H13-P680-11E2].

Page 5 of 25 OPS IMO IV

/

OPS IMO

CPS 9431.l0H

5.7 Operations

Verify occurrence of the following:

1.

Annunciator DIV 1 MSL A CL SCRAM BYP/NOT IN RUN is alarming [5004-lG].

2.

Annunciator DIV 2 MSL B CL SCRAM BYP/NOT IN RUN is alarming [5005-lG].

3.

Annunciator DIV 3 MSL CCL SCRAM BYP/NOT IN RUN is alarming [5005-2G].

4.

Annunciator DIV 4 MSL D CL SCRAM BYP/NOT IN RUN is alarming [5004-2G].

5.8 IF the following annunciators are in alarm OR Condenser Vacuum is being simulated, THEN proceed to step 5.14 and N/A steps not required.

Rev.

2 If annunciators not in alarm, THEN proceed to step 5.9.

1.

MAIN CONDENSER LOW VACUUM BYPASS (5067-4E)

2.

MAIN CONDENSER LOW VACUUM BYPASS (5066-4E)

Page 6 of 25 INITIAL IV I

OPS IMO IV I

OPS IMO IV I

OPS IMO IV I

OPS IMO

CPS 9431.lOH NOTE Valves out of service for maintenance may be NIA 'd.

5.9 Operations

Place/verify the following switches in CLOSE:

5067C

1.

B21H-F028A MAIN STEAM LINE A OUTBD MSIV 2.

B21H-F028B MAIN STEAM LINE B OUTBD MSIV 3.

B21H-F028C MAIN STEAM LINE C OUTBD MSIV

4.

B21H-F028D MAIN STEAM LINE O OUTBD MSIV 5066C

1.

B21H-F022A MAIN STEAM LINE A INBD MSIV 2.

B21H-F022B MAIN STEAM LINE B INBO MSIV

3.

B21H-F022C MAIN STEAM LINE C INBD MSIV

4.

B21H-F022D MAIN STEAM LINED INBD MSIV 5.10 Notify CRS/RO the following annunciators will alarm in step 5.11:

1.

MAIN CONDENSER LOW VACUUM BYPASS (5067-4E)

2.

MAIN CONDENSER LOW VACUUM BYPASS (5066-4E)

Rev.

2 Page 7 of 25 INITIAL IV I

OPS IMO IV I

OPS IMO IV I

OPS IMO IV I

OPS IMO IV I

OPS IMO IV I

OPS IMO IV I

OPS IMO IV I

OPS IMO

CPS 9431. lOH 5.11 Operations:

Momentarily place following switches in BYPASS, then return switches to AUTO.

5067B

1.

Div 1 CONDENSER LOW VACUUM (B21H-S24A)

2.

Div 4 CONDENSER LOW VACUUM (B21H-S24D) 5066B

3.

Div 2 CONDENSER LOW VACUUM (B21H-S24B)

4.

Div 3 CONDENSER LOW VACUUM (B21H-S24C) 5.12 Operations:

Momentarily depress INBOARD ISOLATION SEAL IN RESET (5066B).

5.13 Operations:

Momentarily depress OUTBOARD I SOLATION SEAL IN RESET (50678).

5.14 IF plant conditions do not allow all MSIV's to be open, THEN jumpers may be installed below to provide a signal to logic by simulating the appropriate MSIV is open.

IF a jumper(s) is not required, THEN this step may be N/A'd.

1B21F022A 1Hl3P706A TM015 Terminals 9 & 10 1B21F022B 1H13P707B TMOOB Terminals 9 & 10 1B21F022C 1H13P708B TM004 Terminals 7 & 8 1B21F022D 1Hl3P709B TM004 Terminals 7 & 8 1B21F028A 1H13P706A TM015 Terminals 7 & 8 1B21F028B 1Hl3P707B TMOOB Terminals 7 & 8 1B21F028C 1H13P708B TM004 Terminals 5 & 6 1B21F028D 1Hl3P709B TM004 Terminals 5 & 6 Rev.

2 Page 8 of 25 INITIAL IV I

OPS IMO IV

/

OPS IMO IV

/

OPS IMO IV

/

OPS IMO OPS OPS CV I

CV I

CV I

CV I

CV I

CV I

CV I

CV I

5. 15 CPS 9431.l0H Operations:

OPEN, verify OPEN or verify jumper installed per step 5.14 for OPEN inboard MSIV's 1B21-F022A, B, C, D at 5066C and outboard MSIV's INITIAL 1B21-F028A, B, C, D at 5067C, per 3101.01.

IV I

5.16 Operations:

Verify none of the following alarms/trips are present; if any are present, refer to step 6.2.

OPS IMO

1.

DIV 1 OR 4 MSIV CL TRIP annunciator on panel 5004 window 3-C.

IV

/

OPS IMO

2.

DIV 2 OR 3 MSIV CL TRIP annunciator on panel 5005 window 3-C.

IV

/

6.0 LIMITATIONS 6. 1 If during the performance of this Procedure a SCRAM signal occurs, performance of this procedure shall be halted.

Contact Operations for directions prior to restoring channel or recommencing test.

6. 2 If any of the alarms/trips listed in step 5.16 are present, performance of this procedure will cause a scram initiation signal to occur.

Rev.

2 Notify IMO Supervision and obtain Shift Management permission prior to continuing.

Page 9 of 25 OPS IMO

7.0 7.1 7. 1.1 7. 1. 2 7.1. 3 7.1. 4 7.1. 5 7.1. 6 Rev.

2 CPS 9431.l0H INITIAL MATERIALS/TEST EQUIPMENT The following is a list of the test equipment that is required for the performance of this procedure.

Equivalent test equipment may be used.

Multimeter (DMM) to monitor contact/relay operation Type:

Fluke 45 Range:

o -

125 voe Accuracy: N/A 12 inch metal rule or tape measure (capable of measuring 64ths of an inch).

Scribe Pipe Plug -

SZ4005 (set screw) 3/16" Hex Key (allen wrench)

Portable lighting

<<CM-1 >>

Page 10 of 25

CPS 9431.l0H 8.0 PROCEDURE 8.1 Loop Calibration of RPS MSIV Limit Switch

8. 1. 1

8. 1. 2 NOTE Refer to Figure 1 for MSIV component layout.

Verify or scribe a mark, on limit switch bracket at lower surface of bottom spring seat assembly of valve B21-F028D.

Operations:

Place MAIN STEAMLINE D OUTBD MSIV switch to CLOSE TEST [5067C].

NOTE INITIAL IV

/

OPS IMD The follmving step *will stroke the MSJV, be ready to measure the stroke distance from full open to full shut.

The MSIV test s-witch is a momenta,y pushbutton type and is required to be held in until the desired valve travel is achieved. Releasing the switch 1rvill return the MSIV to OPEN.

8.1. 3

8. 1. 4 8.1. 5 8. 1. 6 Rev.

2 WARNING Pe,formance of the following step will cause valve movement.

Operations:

Depress MAIN STEAMLINE D OUTBD MSIV TEST switch [5067C].

Verify or scribe a mark, on limit switch bracket at lower surface of bottom spring seat assembly of valve B21-F028D.

Operations:

Release MAIN STEAMLINE D OUTBD MSIV test switch.

Measure stroke distance from full open to full close.

Record stroke distance below.

Stroke Distance=

inches Page 11 of 25 OPS OPS

FIGURE 1 MSIV COMPONENT LAYOUT Rev.

2 CPS 9431.lOH

2i E Cl)

IA IA c(

1a Cl) t.n Cl C:

• c:

C.

u, E

~

al I

~

Page 12 of 25 INITIAL

8.1. 7 8.1. 8 Maximum AFT (13 1; closed)

Minimum AFT (1 % closed)

Maximum ALT (9 % closed)

Minimum ALT (5% closed)

Acceptable Limit TRIP SET POINT (7% closed)

Allowable Limit Trip

(~ 13 % closed) 8.1. 9 8.1.10 Rev.

2 CPS 9431.lOH Verify the following:

All Inbd (B21-F022A,B,C,D) and Outbd (B21-F028A,B,C,D) MSIV's are OPEN, or jumper installed per step 5.14.

Annunciator DIV 1 or 4 MSIV CL TRIP is reset

[5004-3C].

Computer Point B21NC050 is reset.

Calculate the acceptable and allowable values and tolerances in the following table.

c:u='

An example is given in Appendix A.

Stroke Distance (8.1.6)

Multiply Multiply Round to nearest whole#

Calculated value (inches)

(inches )

X 64 =

x.13=

round=

down

___ /64 X 64=

x.01 =

X 64 =

X. 09=

X 64 =

X. 05=

X 64 =

X.07=

round=

up round=

down round=

up round=

down

/64

/64

/64

/64 X 64 =

X.13=

round= ---

___ /64 down Independent Verifier:

Verify calculations in step 8.1.8 are correct.

Enter the values from step 8.1.8 into the data table in step 8.1.14 AND 8.2.8.

Page 13 of 25 Initial (A)

( B )

(C)

(D)

(E)

( F )

Ind Ver

CPS 9431.l0H Initial CAUTION 125 VDC exists at terminals. Ensure all necessary safety precautions are taken while *working on energized equipment.

8.1.11 8.1.12 8.1.13 8.1.14 8.1.15 Rev.

2 In Main Control Room, connect a DMM, set to read 125vdc, to the terminals listed below for the channel under test.

B21-F028D:

Hl3-P709B, TM004, Terms 5(+)

6 (-)

WARNING Pe,formance of the following step will cause valve movement.

Operations:

Depress MAIN STEAMLINE D OUTBD MSIV TEST switch [5067C].

WHEN limit switch LS-5 opens, as indicated by DMM, THEN note position of lower surface of bottom spring seat assembly on limit switch bracket.

Record valve travel in AS FOUND column of data table.

<<LBD-1 >>

B21-F028O Valve Desired Tech Spec Minimum Travel OPEN Maximum Value Allowable Acceptable As Found Acceptable (inches)

Limit (inches)

(inches)

(inches)

(inches)

/64

/64

- /64

/64 (E)

(F)

(D)

/64 to

/64 (C)

13% closed (B)

(A)

Verify the following:

Verify there is no sluggish response of the snap-acting limit switch.

Annunciator DIV 1 OR 4 MSIV CL TRIP is alarming [5004 Window 3-C). <<LBD-2>>

Computer Point B21NC050 is tripped.

Both red and green lights are ON for valve B21-F028D.

Page 14 of 25 OPS

8.1.16 8.1.17 8.1.18 8.1.19 8.1.20 8.1.21 8.1.22 Rev.

2 CPS 9431.l0H Operations:

Verify correct BYPASS switch to be placed in BYPASS, then position the MSL D BYPASS switch to BYPASS (50678].

Verify the following:

Annunciator DIV 1 OR 4 MSIV CL TRIP is reset

[5004 window 3-C].

Computer Point B21NC050 is reset.

Operations:

Verify correct BYPASS switch to be placed in NORM, then position the MSL D BYPASS switch to NORM.

Verify the following:

Annunciator DIV 1 OR 4 MSIV CL TRIP is alarming [5004 window 3-C].

Computer Point B21NC050 is tripped.

Operations:

Release MAIN STEAMLINE D OUTBD MSIV TEST switch.

WHEN limit switch LS-5 closes, as indicated by DMM, THEN note position of lower surface of bottom spring seat assembly on limit switch bracket.

Record valve travel in the AS FOUND column of the data table.

B21-F028D Valve Desired Minimum Travel Close Maximum Value Acceptable As Found Acceptable (inches)

(inches)

(inches)

(inches)

Record NIA NIA Page 15 of 25 Initial OPS OPS OPS

8.1.23

8. 1. 24 8. 1. 25 CPS 9431.l0H Verify occurrence of the following:

Annunciator DIV 1 OR 4 MSIV CL TRIP is reset

[5004 window 3-C].

Computer Point B21NC050 is reset.

Red light ON and green light OFF for valve under test B21-F028D.

IF all AS FOUND data is acceptable, THEN;

1.

Acknowledge the AS FOUND data equals the AS LEFT data. <<LBD-1>>

2.

Mark section 8.2 as not applicable.

3.

proceed to step 8. 3.

IF any AS FOUND data is not acceptable, THEN notify Shift Management and IMO Supervision.

8.2 Adjustment of RPS MSIV Limit Switch NOTE Initial The limit switch actuation point is changed by moving the actuation arm of the limit switch.

8.2.1 8.2.2 Rev.

2 At limit switch LS-5, perform following:

1.

Remove limit switch actuation arm pipe plug from spline shaft and properly discard.

2.

Remove actuation arm, noting number of splines moved and replace actuating arm.

NOTE There should be no relative motion between the limit switch shaft and operating lever.

Install a new pipe plug and lightly tighten, (do NOT torque to snug tight).

Page 16 of 25

8.2.3 8.2.4 8.2.5 8.2.6 8. 2. 7 8.2.8 8. 2. 9 Rev.

2 CPS 9431.l0H Initial WARNING Performance of the following step *will cause valve movement.

Operations:

Depress MAIN STEAMLINE D OUTBD MSIV TEST switch.

IV

/

WHEN limit switch LS-5 opens, as indicated by DMM, THEN note position of lower surface of bottom spring seat assembly on limit switch bracket.

OPS IMO Operations:

Release MAIN STEAMLINE D OUTBD MSIV TEST switch.

IV

/

WHEN limit switch LS-5 closes, as indicated by DMM, THEN note position of lower surface of bottom spring seat assembly on limit switch bracket.

Repeat steps 8.2.1 through 8.2.6 until the values are within the acceptable limits.

Torque pipe plug(s) snug tight.

Record final valve travel in the AS LEFT column of data table.

<< LBD-1 >>

B2 l-F028D Valve Desired Tech Spec Minimum Travel OPEN Maximum Value Allowable Acceptable As Left Acceptable (inches)

Limit (inches)

(inches)

(inches)

(inches) 164 s

164

/64

/64 (E)

(F)

(D)

(C) s 13% closed 82 l-F028D Valve Desired Minimum Travel CLOSE Maximum Value Acceptable As Left Acceptable (inches)

(inches)

(inches)

(inches)

Record NIA NIA IF any AS LEFT readings are not acceptable, THEN notify IMO Supervision.

Page 17 of 25 OPS IMO

8.3 8.3.1 8.3.2 CPS 9431.lOH System Restoration Remove the OMM.

Operations:

Verify correct MSIV switch to be placed in AUTO then, place MAIN STEAMLINE 0 OUTBO MSIV switch to AUTO.

NOTE Initial IV I

OPS IMO If there are remaining valves to be tested, the MS/Vs may be left OPEN and step 8.3.3 should be NIA'd.

8. 3.3 8.3.4 8.3.5 Rev.

2 Operations:

Verify correct MSIV to be closed then, CLOSE all Inbd (B21-F022A,B,C,O) and Outbd (B21-F028A,B,C,O) MSIVs (if plant conditions permit).

IF a jumper was installed in step 5.14 THEN remove jumper:

N/A if not installed.

1B21F022A 1B21F022B 1B21F022C 1B21F0220 1B21F028A 1B21F028B 1B21F028C 1B21F0280 1H13P706A 1H13P707B 1H13P708B 1H13P709B 1H13P706A 1H13P707B 1H13P708B 1H13P709B TM015 Terminals 9 & 10 TM008 Terminals 9 & 10 TM004 Terminals 7 & 8 TM004 Terminals 7 & 8 TM015 Terminals 7 & 8 TM008 Terminals 7 & 8 TM004 Terminals 5 & 6 TM004 Terminals 5 & 6 RPS MSIV Channel O is restored to service and operating properly.

Page 18 of 25 IV I

OPS IMO IV

/

IV IV IV IV IV IV IV I

I I

I I

I I

CPS 9431.l0H Initial CAUTION If Low Condenser Vacuum Bypass is reset with a Low Condenser Vacuum condition present a group #1 Main Steam Line Isolation Trip signal will be generated.

8.3.6 8. 3. 7 8.3.8 8. 3.9 8. 3.10 Rev.

2 Operations:

IF directed by Shift Management, THEN reset Low Condenser Vacuum Bypass by momentarily placing the following switches in RESET, then return switches to AUTO.

5067B

1.

Div 1 CONDENSER LOW VACUUM (B21H-S24A)

2.

Div 4 CONDENSER LOW VACUUM (B21H-S24D) 5066B

3.

Div 2 CONDENSER LOW VACUUM (B21H-S24B) 4.

Div 3 CONDENSER LOW VACUUM (B21H-S24C)

List test equipment used for quantitative data in work order.

Verify all information contained on the procedure and data tables is complete and accurate.

Notify the Shift Management of procedure completion.

I OPS OPS OPS OPS Date Time Tech Perform review of AS FOUND data for previous 2 performances of this procedure. If a negative trend is identified notify management and *generate an IR.

Page 19 of 25

CPS 9431.lOH 9.0 ACCEPTANCE CRITERIA 9.1 OPERABILITY Requirements 9. 1. 1 9.1. 2 9. 2 9.2.1 9. 2. 2 9. 2.3 9. 2.4 10. 0

11. 0 11.1 11.1.1 11.1.2 11.1.3 11.1.4 11.1.5 Rev.

2 Failure to meet the Acceptance Criteria given below shall constitute a failure to comply with the applicable LCO.

Refer to Supplemental Review Sheet for applicable LCOs.

The AS LEFT Valve Travel values are within the Allowable Limits specified on the data table.

The annunciator for the valve being tested actuated to satisfy the MSIV Functional Test.

OTHER DATA Requirements The AS LEFT data taken for the Loop Specifications, are within the Acceptable Limits specified on the data table.

The alarms/trip actuations occur as specified.

All other alarms and indications responded correctly.

If any step was unacceptable notify IMO Supervision.

FINAL CONDITIONS All Inbd (B21-F022A,B,C,D) and Outbd (B21-F028A,B,C,D)

MSIVs are operating properly.

REFERENCES Licensing Basis Documents LBD-1 CPS ITS SR 3.3.1.1.13 T6 LBD-2 CPS ITS SR 3.3.1.1.15 T6, SR 3.3.1.1.17 T6 CPS ITS LCO 3.3.6.1, 3.3.1.1 USAR -

3. 1. 2. 3. 10. 1, 5. 4. 5, 7. 2. 1. 1. 4. 2 ( i tern 6),

7'.2.1.1.4.8, 7.2.2.1.2.3.1 ORM Attachment 2-3 (Table 1)

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11. 2 11.2.1 11.2.2 11.2.3

11. 3 11.3.1 11.3.2 11.3.3 11.3.4 11.3.5

11. 4 CPS 9431.l0H Procedures CPS 9031.10, RPS Main Steamline Isolation Valve Channel Functional CPS 8492.02, Electric Conductor Seal Assembly CPS 1887.00, Administration Of ISI Program Activities Design/Vendor/Print/Other E02-1RP99, Sh. 6, 7, 9, 25, 26, 27, 28, 30, G.E. Design Specification Data Sheet 22A4622AV, Sh. 11 K2801-0002, ATWOOD AND MORRILL VENDOR MANUAL MAINTENANCE OF EQUIPMENT QUALIFICATION PROGRAM MANUAL, MS-02.00, EQ-CL013B-02 IP-C-0075, Rev. 1, "Setpoint Calculation for Main Steam Isolation Valve Position for RPS MSIV Closure Trip".

Commitments CM-1 OSHA Reportable Injury 2/1/94, CCT 061412 (7.1.6) 12.0 APPENDICES A.

Example data sheet 13.0 DOCUMENTS 13.1 Surveillance Frequency Control Program (SFCP)

Rev.

2 Page 21 of 25