ML23045A184

Post Examination Comment - Revised Simulator JPM B

ML23045A184
Person / Time
Site:	Oconee
Issue date:	02/14/2023
From:	NRC/RGN-II
To:	Duke Energy Carolinas
References
Download: ML23045A184 (1)

Text

(RO-306a) Page 1 of 11 ML23045A184 REGION II JOB PERFORMANCE MEASURE OCONEE RO-306a Perform Rule 5 for EHT Administrative: No Classroom/Simulator/Plant: Simulator Alternate Path: Yes Alt Path

Description:

_ES-2 fails to go to Manual, which will require placing the EVEN Voters in Override Time Critical: No Time Critical Criteria: ________________________________________________________

Prepared By: Date:

EP Review By: Date:

Reviewed By: Date:

Approved By: Date:

(RO-306a) Page 2 of 11 REGION II - ONS JOB PERFORMANCE MEASURE Task Title : Perform Rule 5 for EHT Task Number :

Alternate Path: Yes Time Critical: No Validation Time: 10 minutes K/A Rating(s):

System: BW/E05 K/A: EA1.06 Rating: 3.8 Task Standard:

Mitigate the Excessive Heat Transfer event on the 1A SG and throttle HPI to prevent reaching an SPDS RED value on RCS Integrity, in accordance with Rule 5, by performing the following alignments:

• Select OFF for 1A MD EFDWP

• Trip both Main FDWPTs

• Close 1FDW-315

• Place 1FDW-33 switch to CLOSE

• Place 1FDW-31 switch to CLOSE

• Place Diverse HPI in BYPASS

• Place ES Ch 1 in MANUAL

• Place EVEN Voter in OVERRIDE

• Throttle HPI (Secure HPI injection flow in 1B header by either stopping 1C HPI pump or closing 1HP-27. Secure HPI injection flow in the 1A HPI header by closing 1HP-26).

References:

EP/1/A/1800/001 Rule 5 (Main Steam Line Break) Rev 05 Tools/Equipment/Procedures Needed:

EP/1/A/1800/001 Rule 5 (Main Steam Line Break) Rev 05 (Note: Below this line is used only for Initial NRC Exams)

===================================================================

Candidate: __________________________________ Time Start: _______________

NAME Time Finish: ______________

Performance Rating: SAT ______ UNSAT ______ Performance Time: _________

Examiner: ______________________________ ___________________________________/_________

NAME SIGNATURE DATE

=========================================================================

Comments

(RO-306a) Page 3 of 11 SIMULATOR OPERATOR JPM SETUP INSTRUCTIONS Directions with IC:

1. RECALL IC: 382 (ILT22 NRC Exam JPM b)

2. When SwitchCheck complete with the exception of H_P1_B92SW_2 1 then select TERMINATE

3. Place one of the STA screens on RCS Integrity for SPDS

4. ENSURE clean copy of Rule 5 available for the candidate

5. Go to RUN when directed by the Lead Examiner

====================================================================

Directions without an IC:

1. Recall IC-1

2. Override ES-2: P2_802SW_2 (ES CHANNEL 2 - AUTO RPS/ES) 1

3. Insert Malfunction: MALF_SG11 (MAIN STEAM LINE A LEAK I/S CONT.) 15.00

4. Insert P1_B92SW_2 1 (this bypasses a single channel of AFIS / Actuation requires both channels)

5. Freeze the simulator following the Reactor Trip

(RO-306a) Page 4 of 11 READ TO OPERATOR DIRECTIONS TO STUDENT I will explain the initial conditions, and state the task to be performed. All control room steps shall be performed for this JPM, including any required communications. I will provide initiating cues and reports on other actions when directed by you. Ensure you indicate to me when you understand your assigned task. To indicate that you have completed your assigned task return the handout sheet I provided you.

INITIAL CONDITIONS Unit 1 was operating at 100% power The reactor has just tripped following a Main Steam Line Break on the 1A SG Immediate Manual Actions (IMAs) and Symptoms Check are complete INITIATING CUE The Control Room SRO directs you to perform Rule 5 for excessive heat transfer on the 1A SG

(RO-306a) Page 5 of 11 START TIME: _______

SEQ PROC DESCRIPTION STEP STEP Perform on the affected headers:

A Header B Header On AFIS HEADER A, depress On AFIS HEADER B, depress CH. 1 INIT. CH. 1 INIT.

On AFIS HEADER A, depress On AFIS HEADER B, depress CH. 2 INIT. CH. 2 INIT.

• Select OFF for 1A MD EFDWP. Select OFF for 1B MD EFDWP.

• Trip both Main FDWPTs. Trip both Main FDWPTs.

• Close 1FDW-315. Close 1FDW-316.

• Place 1FDW-33 switch to Place 1FDW-42 switch to CLOSE. CLOSE. *CRITICAL

• Place 1FDW-31 switch to Place 1FDW-40 switch to STEP Rule CLOSE. CLOSE.

5 Close 1PSW-22. Close 1PSW-24.

1 Close 1PSW-23. Close 1PSW-25. ___ SAT Step 1

STANDARD: Candidate should perform the isolation steps for the ___ UNSAT 1A SG ONLY. The A Header isolations are located on 1UB1 Examiner NOTE: The

• denotes which steps are critical on the A Header COMMENTS:

Verify 1 TD EFDW PUMP operating.

STANDARD: Candidate verifies that the 1TD EFDW Pump is running by looking at status lights and discharge pressure on 1UB1. ___ SAT 2 2 Candidate continues to Step 3.

___ UNSAT COMMENTS:

(RO-306a) Page 6 of 11 SEQ PROC DESCRIPTION STEP STEP Verify 1 TD EFDW PUMP is feeding affected SGs.

STANDARD: Candidate verifies that 1FDW-315 is closed (performed in Step 1) and that the 1 TD EFDW Pump is NOT feeding the 1A SG and proceeds to ___ SAT the RNO.

3 3 COMMENTS:

___ UNSAT GO TO Step 5.

___ SAT 3 STANDARD: Candidate proceeds to Step 5.

4 RNO

___ UNSAT COMMENTS:

Verify 1B SG is an affected SG.

STANDARD: Candidate verifies that 1A SG is the affected SG by looking at Steam Pressure and proceeds to the ___ SAT RNO.

5 5

___ UNSAT COMMENTS:

GO TO Step 7 STANDARD: Candidate goes to Step 7 ___ SAT 5

6 RNO COMMENTS: ___ UNSAT

(RO-306a) Page 7 of 11 SEQ PROC DESCRIPTION STEP STEP WHEN overcooling is stopped, THEN adjust steaming of unaffected SG to maintain CETCs constant using either:

__ TBVs

__ Dispatch two operators to perform Encl 5.24 (Operation of the ADVs). (PS)

STANDARD: Candidate determines that overcooling has stopped by either observing stable RCS temperature or by ___ SAT 7 7 verifying that the 1A SG is dry (<12 inches) and not being fed (1UB1). Candidate should then adjust steaming of 1B SG by rotating the setpoint knob on ___ UNSAT the ICS Turbine Master in the counter-clockwise direction to cause 1B TBVs to throttle open.

COMMENTS:

CAUTION Thermal shock conditions may develop if HPI is NOT throttled and RCS pressure NOT controlled WHEN all exist:

__ Core SCM > 0°F

__ Rx Power < 1%

___ SAT

__ Pzr level rising 8 8 THEN continue.

___ UNSAT STANDARD: Candidate verifies Core SCM on or above the ICCM Monitors, verifies Rx Power on WR or PR meters, and verifies PZR level on the dixons. All indications are on 1UB1.

COMMENTS:

(RO-306a) Page 8 of 11 SEQ PROC DESCRIPTION STEP STEP Verify ES HPI actuated.

STANDARD: Candidate verifies that ES HPI has actuated by looking at Statalarms (1SA-1), ES channel ___ SAT indications under the plexiglass cover, or by looking 9 9 at the AUTO/MANUAL lights.

___ UNSAT COMMENTS:

Place Diverse HPI in BYPASS CRITICAL STEP STANDARD: Candidate pushes Diverse HPI BYPASS pushbutton on 1UB1 and verifies status light 10 10 changes and Statalarm (1SA-1) comes in. ___ SAT COMMENTS:

___ UNSAT Perform both:

__ Place ES CH 1 in MANUAL.*

__ Place ES CH 2 in MANUAL.

• CRITICAL STANDARD: Candidate pushes MANUAL pushbutton for ES CH STEP 1 and 2 on 1UB2 and verifies AUTO light (blue) goes out on CH 1 only.

11 11 ES CH 2 fails to go to MANUAL. Candidate ___ SAT proceeds to step 11 RNO.

___ UNSAT COMMENTS:

(RO-306a) Page 9 of 11 SEQ PROC DESCRIPTION STEP STEP

[ALTERNATE PATH]

IF ES CH 2 fails to go to MANUAL, THEN place EVEN voter in OVERRIDE. CRITICAL STEP STANDARD: Candidate determines that ES CH 2 failed to go to 11 MANUAL (blue AUTO light still lit) and presses the 12 EVEN Voter OVERRIDE pushbutton on 1UB2. This ___ SAT RNO will clear the statalarm for ES CH 2 actuation on 1SA-1.

COMMENTS: ___ UNSAT Perform the following to stabilize RCS P/T:

__ Throttle HPI.*

__ Reduce 1HP-120 setpoint to control at >100 [180 acc].

__ Adjust steaming of unaffected SG as necessary to maintain CETCs constant.

STANDARD: Candidate stabilizes RCS P/T and throttles HPI to prevent an SPDS RED value on RCS Integrity by performing the following on 1UB1:

• Securing HPI flow in the 1B HPI Header by either:

• Securing 1C HPIP and verifying either Red *CRITICAL lights OFF or amps have gone to zero. STEP

• Closing 1HP-27 and verifying Green light ON and Red light OFF.

13 12 ___ SAT

• Limiting HPI flow in the 1A HPI Header to flow through 1HP-120 by closing 1HP-26 and verifying Green light ON and Red light OFF.

___ UNSAT Candidate adjusts the thumbwheel (setpoint) on 1HP-120 to >180 inches (>45% on the dial).

Candidate will adjust TURBINE MASTER thumbwheel (setpoint) OR use TBVs in Manual to stabilize CETCs.

COMMENTS:

END TASK TIME STOP: ________

(RO-306a) Page 10 of 11 CRITICAL STEP EXPLANATIONS SEQ Explanation STEP #

1 This step is required to isolate the correct SG. Isolating the wrong SG will lead to a LOHT 10 This step is required to gain manual control of HPI to allow throttling 11 This step is required to gain manual control of HPI to allow throttling 12 This step is required to gain manual control of HPI to allow throttling 13 This step is required to prevent reaching an SPDS RED condition on RCS INTEGRITY

b CANDIDATE CUE SHEET (TO BE RETURNED TO EXAMINER UPON COMPLETION OF TASK)

INITIAL CONDITIONS Unit 1 was operating at 100% power The reactor has just tripped following a Main Steam Line Break on the 1A SG Immediate Manual Actions (IMAs) and Symptoms Check are complete INITIATING CUE The Control Room SRO directs you to perform Rule 5 for excessive heat transfer on the 1A SG