ML24005A116
| ML24005A116 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 01/05/2024 |
| From: | NRC/RGN-II |
| To: | |
| References | |
| Download: ML24005A116 (1) | |
Text
Recommendation for 2023-301 CR/SIM 7 (RESPOND TO THE TRIP OF A REACTOR RECIRC PUMP WHILE THE RECIRC PUMPS ARE RUNNING LESS THAN 35% SPEED, AND PLOT PLANT OPERATION ON THE POWER/FLOW MAP. ALT PATH )
Change step 2 of JPM CR/SIM 7 from a CRITICAL step to a NON-CRITICAL step and update remainder of JPM to reflect this change. After doing so, there will be three CRITICAL steps remaining in the JPM. Updated JPM is included in this package.
Reasoning:
CR/SIM 7 is modified from a bank JPM that was used on the 2011-301 NRC exam as JPM SIM
- 7. The 2011 version was a NORMAL JPM and modified to be an ALTERNATE path for the 2023-301 exam.
On the 2011-301 exam, the step for plotting on the Power/Flow map was NON-CRITICAL. (see screenshot below)
When updating the JPM to its current version, Step 2 of the JPM was inadvertently changed to a
critical step. While this step does allow for evaluating the applicants ability to plot on the Power/Flow map, it is NOT CRITICAL to the response of a tripped Recirc pump in limiting Recirc Loop temperatures and, due to plant conditions, there are no resultant required operator actions from the plot. A Power/Flow plot is also NOT CRITICAL to responding to the trip of the second Recirc Pump (ALT path), which requires the applicant to TRIP the reactor.
There is a prompt in the JPM for the examiner to direct the applicant to continue to respond to the tripped Recirc pump even if the plot places the reactor in the Safety Limit area of the Power/Flow map. (see below) If this action was truly CRITICAL, the applicant would have been allowed to continue with the appropriate actions based on the plot.
Actions:
A Condition Report, CR# 11030723, was written on 12/11/2023 to place the note that explains how to calculate core flow prior to any step in which the operator is to plot the operating point on the Power/Flow map.
Southern Nuclear Company
Operations Training Job Performance Measure (JPM)
FINAL CR/SIM 7 (RO & SRO-I)
Title:
Version:
RESPOND TO THE TRIP OF A REACTOR RECIRC PUMP WHILE THE 0.2 RECIRC PUMPS ARE RUNNING AT LESS THAN 35% SPEED, AND PLOT PLANT OPERATION ON THE POWER/FLOW MAP. (ALT PATH)
Author: Media Number: Time:
Anthony Ball 2023-301 CR-SIM 7 15.0 Minutes
Line Technical Review By (N/A for minor revisions) Date:
N/A N/A
Reviewed by Instructional Technologist or designee (N/A for minor revisions) Date:
N/A N/A
Approved By (Training Program Manager or Lead Instructor) Date:
Charlie Edmund 10/30/2023
2023-301 CR-SIM 7 Page 2 of 12
Course Number Program Name Media Number N/A OPERATIONS TRAINING 2023-301 CR-SIM 7
Ver. No. Date Reason for Revision Author Print Peer Review Initials/Name Print Initials/Name 00 5/26/11 Initial development for NRC Exam 2011-301. ELJ CME 0.1 10/01/21 Updated for ILT-14 Audit Exam & added Alt ARB JDW path.
0.2 10/30/23 Updated to current procedure for use on ILT-15 ARB JDW NRC Exam as CR-SIM 7. Anthony Ball Derek Williams
2023-301 CR-SIM 7 Page 3 of 12 UNIT 1 ( ) UNIT 2 (X)
TASK TITLE: RESPOND TO THE TRIP OF A REACTOR RECIRC PUMP WHILE THE RECIRC PUMPS ARE RUNNING AT LESS THAN 35% SPEED, AND PLOT PLANT OPERATION ON THE POWER/FLOW MAP. (ALT PATH)
JPM NUMBER: 2023-301 CR-SIM 7
TASK STANDARD: The task shall be completed when the tripped Recirc Pump Discharge valve has been closed and then re-opened, AND then performs the Immediate Operator Actions of 34AB-B31-001-2.
TASK NUMBER: 200.037
OBJECTIVE NUMBER: 200.037.A
PLANT HATCH JTA IMPORTANCE RATING:
K/A CATALOG NUMBER: 216000A2.14
K/A CATALOG JTA IMPORTANCE RATING:
RO 3.6
SRO 3.3
OPERATOR APPLICABILITY: Nuclear Plant Operator (NPO)
GENERAL
REFERENCES:
Unit 2 34AB-B31-001-2 (Ver 12.0) 34GO-OPS-005-2 (Ver 31.9) 34SO-B31-001-2 (Ver 48.5)
REQUIRED MATERIALS: Unit 2 34AB-B31-001-2 (Ver 12.0) 34GO-OPS-005-2 (Ver 31.9) 34SO-B31-001-2 (Ver 48.5)
APPROXIMATE COMPLETION TIME: 15 Minutes
SIMULATOR SETUP: REFER TO SIMULATOR SETUP SHEET ON THE FOLLOWING PAGE
2023-301 CR-SIM 7 Page 4 of 12 SIMULATOR A SETUP
Simulator Initial Conditions:
- 1. RESET the Simulator to IC #110 or SNAP 617 and leave in FREEZE.
- 2. INSERT the following MALFUNCTIONS:
RB# MALF # TITLE FINAL RAMP ACT.
VALUE RATE TIME RB-1 mfB31_38B Recirc Pump B Motor Protection Trip N/A N/A 9999
- 3. INSERT the following EVENT TRIGGER
ET # Description
EGB31-5 Inserts EGB31-6 when 2B31-F031B is full closed, red light out.
EGB31-6 Inserts mfB31_37A when 2B31-F031B is throttled open, red light on.
(DO NOT LOAD IN SCENARIO FILE)
- 4. Take the Simulator OUT OF FREEZE and PERFORM the following MANIPULATIONS OR RUN SCENARIO FILE and EVENT TRIGGER (current rev) 2023-CR-SIM 7:
A. REDUCE Reactor Recirc Pumps to MINIMUM speed.
B. INSERT control rods to reduce power to approx. 33%, with the goal of remaining below the 78% load line.
C. PRESS RB-1 to activate Recirc Pump B Motor Protection Trip.
D. Allow plant conditions to STABILIZE.
E. Acknowledge/reset alarms.
F. TURN OFF the Process Computer monitor.
- 5. PLACE the Simulator in FREEZE until the INITIATING CUE is given.
- 6. ESTIMATED Simulator SETUP TIME: 25 Minutes
2023-301 CR-SIM 7 Page 5 of 12
EVALUATOR COPY
UNIT 2
READ TO THE OPERATOR
INITIAL CONDITIONS:
- 1. Unit 2 was operating approximately 33% power.
- 2. Both Reactor Recirc Pumps were running at minimum speed.
- 4. The Process Computer monitor is NOT functional.
- 5. The 2B Reactor Recirc pump has just tripped.
- 6. Personnel have been directed to investigate the cause of the pump trip.
INITIATING CUES:
- 1. RESPOND to the trip of the 2B Reactor Recirc Pump IAW 34AB-B31-001-2.
AND
- 2. PLOT the plant operating point on the Unit 2 Power/Flow map.
2023-301 CR-SIM 7 Page 6 of 12
STEP PERFORMANCE STEP STANDARD SAT/UNSAT
- (COMMENTS)
For INITIAL Operator Programs:
For OJT/OJE; ALL PROCEDURE STEPS must be completed for Satisfactory Performance.
For License Examinations; ALL CRITICAL STEPS must be completed for Satisfactory Performance.
IF THEN Human performance tools, safety, PPE met (1), AND Mark the JPM as a PASS For initial trg all steps completed correctly OR PASS For continuing trg, critical steps (if used) completed correctly FAIL Above standards not met Mark the JPM as a FAIL
(1) The standard for human performance tools, safety, PPE, and other pertinent expectations is considered met provided any deviations are minor and have little or no actual or potential consequence. Errors may be self-corrected provided the action would not have resulted in significant actual or potential consequences.
START TIME:__________
NOTE: Provide the operator with a copy of 34AB-B31-001-2.
- 1. The operator identifies correct The operator has IDENTIFIED procedure SECTION to use. the correct section: Section 1 Loss Of A Single Reactor Recirculation Pump A or B.
NOTE: The operator may choose to plot position on the Power/Flow map at this time. These steps are NOT required to be done in order.
NOTE: It is expected that the operator will read the NOTE, located just after step 4.4. The NOTE describes how to determine core flow with one Recirc Pump out of service when the Running pump is operating below 35% pump speed.
(** Indicates critical step)
2023-301 CR-SIM 7 Page 7 of 12
STEP PERFORMANCE STEP STANDARD SAT/UNSAT
- (COMMENTS)
NOTE: The operator will calculate actual core flow as follows:
1st step: ADD Jet Pump Total Flow indications (2B21-R611A/R611B (P602)).
The values total approx 24 MLB/hr for these plant conditions.
2nd step: This number is divided by 77 MLB/hr (rated core flow).
The result is ACTUAL CORE FLOW, approx. 31% then, 3rd step: The operator uses 2C51-K620A&B, APRM Display (P603) to determine that Rx power is approx. 33%.
- 2. Verfy whether the plant is operating The operator has PLOTTED the inside the Immediate Exit Region of operating point on the the Power/Flow Map. Power/Flow map (P603) and has DETERMINED the plant is operating in the ACCEPTABLE region with the following values:
ACTUAL CORE FLOW, approx.
31% (Accept 28.0% - 34.0%)
Rx power is approx. 33%
(Step 4.1 & 4.2) (Accept +/- 3%);
NOTE: If the operator uses the 2B31-R613, Core Plate dp/Rx Core Flow recorder (P603), the plotted point will erroneously indicate the plant is operating in the Safety Limit Region of the Power/Flow map, approx. 7%
core flow with 33% power.
See attached EVALUATOR ANSWER KEY.
PROMPT: IF the operator reports that the plant is in the Safety Limit area of the Power/Flow Map, DIRECT the operator to continue responding to the tripped Recirc Pump (unless all required actions have previously been taken).
- 3. Verify whether the OPRM System is The operator has DETERMINED INOPERABLE. the OPRMs are OPERABLE, (information provided in JPM Initial Conditions) and that it is (Step 4.1 & 4.2) NOT necessary to enter 34AB-C51-001-2.
(** Indicates critical step)
2023-301 CR-SIM 7 Page 8 of 12
STEP PERFORMANCE STEP STANDARD SAT/UNSAT
- (COMMENTS)
- 4. Verify the Running Recirc. Pump is The operator has VERIFIED that operating below rated flow for one the 2A Recirc pump is pump. operating below rated flow using (Step 4.6) 2B31-R617, Drive Flow indicator (P602).
- 5. Close Reactor Recirc Pump Discharge At Panel 2H11-P602, the operator Valve, 2B31-F031B and record the has PLACED the PUMP DISCH time. VLV, 2B31-F031B into the close position, green light ILLUMINATED, red light EXTINGUISHED, and the operator has RECORDED the (Step 4.7) time the valve is fully CLOSED.
(NOT critical to record time)
PROMPT: IF addressed, INFORM the Operator it is desired to maintain Recirc loop temperature.
PROMPT: AFTER the Operator has fully closed 2B31-F031B, INFORM the Operator, using Time Compression, four (4) minutes has elapsed.
- 6. After 4 - 5 minitues, throttle open The operator has THROTTLED Reactor Recirc Pump Discharge PUMP DISCH VLV, 2B31-Valve, 2B31-F031B to maintain less F031B OPEN (P602) within than 50°F suction temperature 4 - 5 minutes of the time recorded differential between the loops, as in JPM step 6, red and green indicated on 2B31-R650, Recirc Pump lights ILLUMINATED.
Suction Temperature, panel 2H11-P602.
(Step 4.8)
(** Indicates critical step)
2023-301 CR-SIM 7 Page 9 of 12
STEP PERFORMANCE STEP STANDARD SAT/UNSAT
- (COMMENTS)
ALTERNATE PATH STARTS HERE (Step 7)
(Event Trigger EGB31-6 TRIPS ASD 2A after 2B31-F031B is THROTTLED OPEN).
NOTE: INSERTING A MANUAL SCRAM IS AN IMMEDIATE OPERATOR ACTION IF BOTH RECIRC PUMPS ARE TRIPPED.
- 7. Enter 34AB-C71-001-2, Scram On 2H11-P603, the Operator Procedure, AND INSERTS a MANUAL SCRAM SCRAM the reactor (depresses at least one scram (Section II, Step 3.1) pushbutton in RPS channels A and B).
PROMPT: WHEN the operator addresses subsequent steps in the procedure as the Shift Supervisor, INFORM the operator that another operator will complete the rest of the procedure steps.
END TIME:__________
NOTE: The terminating cue shall be given to the operator when:
When the operator completes step 7.
With NO reasonable progress, the operator exceeds double the allotted time.
Operator states the task is complete.
TERMINATING CUE: We will stop here.
EVALUATOR - PICK UP the Initiating Cue sheet.
(** Indicates critical step)
2023-301 CR-SIM 7 Page 10 of 12
Summary of JPM Attributes
JPM 2023-301 CR-SIM 7:
SUMMARY
OF JPM QUANTITATIVE ATTRIBUTES
CATEGORY Minimum NRC JPM CONTENT Attributes
Total Critical Steps At least 2 3 Step 5 Close 2B31-F031B Allows pump to stop rotating.
Step 6 Open 2B31-F031B Allows natural circulation to flow through recirc loop.
Step 7 Perfoms Manual Scram Immediate Operator Action without forced circulation.
Number of JPM Steps <30 7
Time to Perform JPM <45 min 15 min
Normal / Faulted /
Alternate Path Alternate Path When 2B31-F031B is throttled open ASD 2A will trip resulting in loss of forced Recirc circulation requiring a manual scram to be inserted.
Setting (administered)
Simulator
Is LOD 1 or 5 NO NO
Evaluator Answer Key
UNIT 2
READ TO THE OPERATOR
INITIAL CONDITIONS:
- 1. Unit 2 was operating approximately 33% power.
- 2. Both Reactor Recirc Pumps were running at minimum speed.
- 4. The Process Computer monitor is NOT functional.
- 5. The 2B Reactor Recirc pump has just tripped.
- 6. Personnel have been directed to investigate the cause of the pump trip.
INITIATING CUES:
- 1. RESPOND to the trip of the 2B Reactor Recirc Pump IAW 34AB-B31-001-2.
AND
- 2. PLOT the plant operating point on the Unit 2 Power/Flow map.