ML25321A030

ADAMSS-1B Post Exam Comments

ML25321A030
Person / Time
Site:	Farley
Issue date:	11/17/2025
From:	NRC/RGN-II
To:	Southern Nuclear Operating Co
References
Download: ML25321A030 (1)

Text

FA2025-301 FACILITY COMMENT: The facility request to change one task standard of JPM f.

• The current task standard is: Adjust PK-145 to achieve maximum flow without exceeding 135gpm.

• The proposed new task standard is: Adjust PK-145 to initiate flow.

• Basis: FNP-1-SOP-7.0, Residual Heat Removal System, Section 4.1 step 14.k states that if the cold shutdown boron concentration is not achieved then return to step g and repeat the boration procedure. Regardless of the amount of flow initiated, as long as flow was initiated, the operator could repeat the steps until the required concentration was achieved. Additionally, in this JPM, exceeding 135 gpm was not possible due to plant configuration.

• See Attached JPM, Procedure and CR11214758 ML25321A030

ILT-44 JPM f Page 1 of 6 CRO-066D TITLE: Borate The RHR System To Prepare For RCS Cooldown EVALUATION LOCATION: X SIMULATOR ONLY PROJECTED TIME: 20 MIN SIMULATOR IC NUMBER: IC-400 ALTERNATE PATH TIME CRITICAL PRA __

JPM DIRECTIONS:

1. Examinee will obtain all references from the simulator.

2. The actions of this task are intended to be performed on an Active Simulator in which the examinee may diagnose the correctness of system response to his/her actions and respond to any abnormal conditions which may arise.

3. Provide student with HANDOUT.

4. Allow student time to review control board.

5. A surrogate will act as other the position and acknowledge alarms that do not pertain to the jpm at the request of the applicant.

TASK STANDARD: Upon successful completion of this JPM, the applicant will:

x Call and have RHR-V-8720A (V013A) opened.

x Close Ltdn Orif ISO valves HV8149A, B & C x Place handswitch for TCV143 to the VCT position.

x Place VCT HI LEVEL DIVERT VLV Q1E21LCV115A to the RHT position x Open HIK-142 to 100%

x Adjust PK-145 to achieve maximum flow without exceeding 135 gpm.

x After 5 minutes (time compressed), close HIK-142 Examinee:

Overall JPM Performance:

Satisfactory

Unsatisfactory Evaluator Comments (attach additional sheets if necessary)

EXAMINER:

Developer S Jackson Date: 5/23/25 NRC Approval See NUREG 1021 Form 2.3-2

ILT-44 JPM f Page 2 of 6 CONDITIONS When I tell you to begin, you are to BORATE A TRAIN OF RHR. The conditions under which this task is to be performed are:

a. The CCW system is in operation and aligned per SOP-23.0.

b. The Plant is in Mode 3.

c. A Train RHR is running and sample results indicate that RHR boron concentration is less than the cold shutdown boron concentration of 1000 ppm.

d. Steps 1 through 13 of Section 4.1, Preparing A Train RHR for RCS Cooldown from ECCS Standby Alignment, of FNP-1-SOP-7.0, have been completed.

e. The pre-job brief that is required will be done in a briefing room and when the pre-job brief is concluded, you will begin at step 14 of section 4.1 of FNP-1-SOP-7.0.

f. The Shift Supervisor does not desire Excess Letdown to be placed in service.

Your task is to borate A Train of RHR per FNP-1-SOP-7.0, section 4.1 beginning at step 14.

EVALUATION CHECKLIST RESULTS:

ELEMENTS:

STANDARDS:

(CIRCLE)

START TIME

1. (SOP-7.0 Step 14a)

Verify closed B train RHR to CVCS letdown isolation RHR-V-8720B (V013B).

Contacts Rad Side Systems Operator by phone or gaitronics to verify (V013B) closed.

CUE from Booth operator: Radside operator reports V013B is closed.

S / U

• 2. (SOP-7.0 Step 14b)

Open A train RHR to CVCS letdown isolation RHR-V-8720A (V013A).

Contacts Rad Side Systems Operator by phone or gaitronics to open (V013A).

TRIGGER 1 CUE from Booth operator: Radside operator reports V013A is open.

S / U NOTE: Open V-8720A (V013A) - REMOTE / LOA-RHR001 / 1 / 10 second ramp

3. (SOP-7.0 Step 14c)

If desired then establish excess letdown flow per SOP-2.7.

CUE: THE SHIFT SUPERVISOR DOES NOT DESIRE EXCESS LETDOWN IN SERVICE.

S / U

ILT-44 JPM f Page 3 of 6 RESULTS:

ELEMENTS:

STANDARDS:

(CIRCLE)

4. (SOP-7.0 14.d)

If letdown pressure is higher than RHR pump discharge pressure then Isolate letdown per SOP-2.1.

Check letdown PI-145 LTDN HX OUTLET PRESS and PI-600A RHR PUMP DISCH PRESS. Observes PI-145 > PI-600A.

Proceeds to SOP-2.1 section 4.4.

S / U

5. (SOP-2.1 Step 4.4.1)

Have Chemistry Secure the Zinc Addition System (ZAS).

Contacts Chemistry via phone or gaitronics to Secure ZAS.

CUE from Booth operator: Zinc Addition System is secured.

S / U

• 6. (SOP-2.1 Step 4.4.2)

Close Ltdn Orif ISO valves HV8149A, B & C The hand switches for HV-8149A & C taken to close. Observes: HV-8149A, B & C GREEN lights are LIT, RED lights are NOT LIT.

S / U

7. (SOP-2.1 Step 4.4.3)

IF desired then close both Ltdn Line Iso LCV459 and LCV460 V459 & V460 may be closed or left open.

Observes RED light lit for open valves and GREEN light lit for closed valves.

S / U Note: When the auto makeup occurs and the applicant begins to take actions for an auto makeup which requires no manipulations, CUE: Another operator will take action for an auto makeup.

8. (SOP-2.1 Step 4.4.4)

Place CHG FLOW FK 122 in MANUAL.

FK 122 Manual pushbutton is depressed and is backlit.

S / U

9. (SOP-2.1 Step 4.4.5)

Adjust CHG FLOW FK 122 demand signal to 0% (closed)

Demand is lowered to 0% (closed).

S / U

10. (SOP-2.1 Step 4.4.6a)

If #1 seal leakoff is in service then maintain seal injection flow at approximately 8 gpm.

Observes #1 seal leakoff flow indicated on FR0154A RCP WIDE RANGE SEAL LEAKOFF and HV 8141A, (B, & C) RCP SEAL LEAKOFF valves Open. HIK 186 is in auto and will not need adjustment.

S / U

11. (SOP-2.1 Step 4.4.6b)

If #1 seal leakoff is NOT in service then maintain seal injection flow 2 to 8 gpm.

Determines this action not required S / U

12. (SOP-2.1 Step 4.4.7)

If desired then utilize excess letdown system per SOP-2.7 to maintain PRZR level at its programmed value.

CUE: THE SHIFT SUPERVISOR DOES NOT DESIRE EXCESS LETDOWN IN SERVICE.

S / U

ILT-44 JPM f Page 4 of 6 RESULTS:

ELEMENTS:

STANDARDS:

(CIRCLE)

13. (SOP-2.1 Step 4.4.8)

If RCS Pressure is between 2215 and 2255 then perform STP-8.0 CUE: ANOTHER OPERATOR WILL PERFORM STP-8.0 PER STEP 4.4.10.

S / U

• 14. (SOP-7.0 Step 14e)

Divert letdown to the VCT by placing handswitch for LTDN HI TEMP Divert VLV Q1E21TCV143 to the VCT position Places handswitch for LTDN HI TEMP DIVERT VLV TCV-143 to the VCT position.

Observes the The VCT light is lit, the Demin light is NOT lit.

S / U

• 15. (SOP-7.0 Step 14f)

Divert letdown to the RHTs by placing VCT HI LEVEL DIVERT VLV Q1E21LCV115A to the RHT position, ensure the white H.U. Tank light is lit.

VCT HI LEVEL DIVERT VLV LCV-115A placed to the RHT position. Observes the VCT light is NOT lit, the RHT light is lit.

S / U

• 16. (SOP-7.0 Step 14g)

Slowly open RHR TO LTDN HX HIK 142 HIK-142 turned slowly fully clockwise to 100% open.

S / U Note: With PK-145 fully open, 135 GPM will not be exceeded. May use SLIM controller.

• 17. (SOP-7.0 14h)

Adjust LP LTDN PRESS PK-145 (6004) as necessary to provide maximum letdown flow.

LP LTDN PRESS PK-145 adjusted in Manual not to exceed 135 gpm flow on FI-150.

S / U CUE:

FIVE MINUTES HAVE ELAPSED.

• 18. (SOP-7.0 Step 14.i)

After at least 5 minutes of flushing close RHR to LTDN HX HIK 142 and sample RHR for boron concentration HIK-142 turned fully counter clockwise to 0%

closed.

S / U

19. (SOP-7.0 Step 14j)

Requests Chemistry sample A Train RHR Contacts Chemistry via phone or gaitronics to sample A train RHR.

CUE: From Booth Operator Chemistry acknowledges the request for a sample of A train RHR.

S / U Terminate JPM when Boron sample has been requested.

STOP TIME CRITICAL ELEMENTS: Critical Elements are denoted by an asterisk (*) before the element number.

ILT-44 JPM f Page 5 of 6 GENERAL

REFERENCES:

1.

FNP-1-SOP-7.0, v115

2.

FNP-1-SOP-2.1, v151

3.

K/As: 005K1.04 3.6 GENERAL TOOLS AND EQUIPMENT: NONE Critical ELEMENT justification:

ELEMENT Evaluation 1

NON Critical: Valve is not critical to the mechanical alignment necessary to borate the RHR system via Low Pressure letdown flow.

2 CRITICAL: Completes part of the assigned task by establishing a portion of the mechanical line up of LP letdown.

3 NON Critical: Step is N/A.

4 NON Critical: Procedure flow path step, directing operator to next section.

5 NON Critical: Securing the Zinc Addition System is not critical to the mechanical alignment necessary to borate the RHR system via Low Pressure letdown flow 6

CRITICAL: Isolates the Normal Letdown flow path so that flow may be obtained when Low Pressure letdown is aligned since operating pressure of normal letdown is greater than RHR pump discharge pressure.

7 NON Critical: These valves are not critical since normal letdown is isolated in the previous element.

8-9 NON Critical: Manually closing FK-122 is not critical to the mechanical alignment necessary to borate the RHR system via Low Pressure letdown flow.

10-11 NON Critical: Adjusting seal injection flow is not critical to the mechanical alignment necessary to borate the RHR system via Low Pressure letdown flow.

12 NON Critical: N/A step 13 NON Critical: Another operator is directed to perfrom and is not part of the task.

14 CRITICAL: Bypassing the demineralizers is critical to establishing the proper letdown flowpath to prevent diluting the demineralizer beds.

15 CRITICAL: Bypassing the VCT to the RHTs critical to establishing the proper letdown flowpath to prevent diluting the RCS.

16 CRITICAL: Completes part of the assigned task by establishing a portion of the mechanical line up of LP letdown.

17 CRITICAL: Completes part of the assigned task by establishing a portion of the mechanical line up of LP letdown.

18 CRITICAL: Completes part of the assigned task by establishing a portion of the mechanical line up of LP letdown.

19 NON Critical: Requesting action from another department not critical.

COMMENTS:

ILT-44 JPM f Page 1 of 1 HANDOUT CONDITIONS When I tell you to begin, you are to BORATE A TRAIN OF RHR. The conditions under which this task is to be performed are:

a. The CCW system is in operation and aligned per SOP-23.0.

b. The Plant is in Mode 3.

c. A Train RHR is running and sample results indicate that RHR boron concentration is less than the cold shutdown boron concentration of 1000 ppm.

d. Steps 1 through 13 of Section 4.1, Preparing A Train RHR for RCS Cooldown from ECCS Standby Alignment, of FNP-1-SOP-7.0, have been completed.

e. The pre-job brief that is required will be done in a briefing room and when the pre-job brief is concluded, you will begin at step 14 of section 4.1 of FNP-1-SOP-7.0.

f. The Shift Supervisor does not desire Excess Letdown to be placed in service.

Your task is to borate A Train of RHR per FNP-1-SOP-7.0, section 4.1 beginning at step 14.

Residual Heat Removal System FNP-1-SOP-7.0 FARLEY Version 115.0 Unit 1 Page 12 of 171 4.1 Preparing A Train RHR for RCS Cooldown from ECCS Standby Alignment (continued) 14.

IF A Train RHR boron concentration is less than the cold shutdown boron concentration required by plant conditions, raise concentration as follows:

CAUTION The only time both 1A AND 1B RHR Hx to CVCS letdown isolation valves 1-RHR-V-8720A (Q1E11V013A) and 1-RHR-V-8720B (Q1E11V013B) may be open at the same time is during the shifting of LP letdown from one train of RHR to the other.

a.

Ensure closed 1B RHR Hx to CVCS letdown iso 1-RHR-V-8720B (Q1E11V013B).

b.

Open 1A RHR Hx to CVCS letdown iso 1-RHR-V-8720A (Q1E11V013A).

c.

IF desired, establish excess letdown flow per FNP-1-SOP-2.7, Chemical And Volume Control System Excess Letdown.

d.

IF LETDOWN PRESSURE is higher than RHR PUMP discharge pressure or if desired for other reasons, isolate normal letdown per FNP-1-SOP-2.1, Chemical And Volume Control System Plant Startup And Operation.

e.

Divert letdown to the VCT by placing handswitch for LTDN HI TEMP Divert VLV Q1E21TCV143 to the VCT position.

f.

Divert letdown to the RHTs by placing VCT HI LEVEL DIVERT VLV Q1E21LCV115A to the RHT position, ensure the white H.U. Tank light is lit.

g.

Slowly open RHR TO LTDN HX HIK 142.

CAUTION Do not exceed 135 gpm flow through the letdown heat exchanger.

h.

Adjust LP LTDN PRESS PK 145 as necessary to provide maximum letdown flow. (6004) i.

After at least 5 minutes of flushing, close RHR to LTDN HX HIK 142.

j.

Sample RHR for boron concentration.

k.

IF boron concentration is less than required for cold shutdown boron concentration, return to Step 14.g.

l.

IF boron concentration is equal to OR greater than required cold shutdown boron concentration, proceed to Step 14.m.

m.

Return letdown flow to the VCT by placing VCT HI LEVEL DIVERT VLV Q1E21LCV115A in the VCT position, WHEN VCT light lit, place in AUTO.

n.

Place LTDN HI TEMP DIVERT valve Q1E21TCV143 to the DEMIN position, WHEN DEMIN light lit, place in AUTO.