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 ML24005A116
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:
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)
Version:
0.2 Author
Anthony Ball Media Number:
2023-301 CR-SIM 7 Time:
15.0 Minutes Line Technical Review By (N/A for minor revisions)
N/A Date:
N/A Reviewed by Instructional Technologist or designee (N/A for minor revisions)
N/A Date:
N/A Approved By (Training Program Manager or Lead Instructor)
Charlie Edmund Date:
10/30/2023
2023-301 CR-SIM 7 Page 2 of 12 Course Number N/A Program Name OPERATIONS TRAINING Media Number 2023-301 CR-SIM 7 Ver. No.
Date Reason for Revision Author Print Initials/Name Peer Review 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 path.
ARB JDW 0.2 10/30/23 Updated to current procedure for use on ILT-15 NRC Exam as CR-SIM 7.
ARB Anthony Ball JDW 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:
RO SRO 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 VALUE RAMP RATE ACT.
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.
- 3.
- 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)
(** Indicates critical step)
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.
(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 procedure SECTION to use.
The operator has IDENTIFIED 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.
IF THEN PASS Human performance tools, safety, PPE met (1), AND For initial trg all steps completed correctly OR For continuing trg, critical steps (if used) completed correctly Mark the JPM as a PASS FAIL Above standards not met Mark the JPM as a FAIL
2023-301 CR-SIM 7 Page 7 of 12 STEP PERFORMANCE STEP STANDARD SAT/UNSAT (COMMENTS)
(** Indicates critical step)
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 inside the Immediate Exit Region of the Power/Flow Map.
(Step 4.1 & 4.2)
The operator has PLOTTED the operating point on the 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%
(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 INOPERABLE.
(Step 4.1 & 4.2)
The operator has DETERMINED the OPRMs are OPERABLE, (information provided in JPM Initial Conditions) and that it is NOT necessary to enter 34AB-C51-001-2.
2023-301 CR-SIM 7 Page 8 of 12 STEP PERFORMANCE STEP STANDARD SAT/UNSAT (COMMENTS)
(** Indicates critical step)
- 4. Verify the Running Recirc. Pump is operating below rated flow for one pump.
(Step 4.6)
The operator has VERIFIED that the 2A Recirc pump is operating below rated flow using 2B31-R617, Drive Flow indicator (P602).
- 5. Close Reactor Recirc Pump Discharge Valve, 2B31-F031B and record the time.
(Step 4.7)
At Panel 2H11-P602, the operator has PLACED the PUMP DISCH VLV, 2B31-F031B into the close position, green light ILLUMINATED, red light EXTINGUISHED, and the operator has RECORDED the 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 Reactor Recirc Pump Discharge Valve, 2B31-F031B to maintain less than 50°F suction temperature differential between the loops, as indicated on 2B31-R650, Recirc Pump Suction Temperature, panel 2H11-P602.
(Step 4.8)
The operator has THROTTLED PUMP DISCH VLV, 2B31-F031B OPEN (P602) within 4 - 5 minutes of the time recorded in JPM step 6, red and green lights ILLUMINATED.
2023-301 CR-SIM 7 Page 9 of 12 STEP PERFORMANCE STEP STANDARD SAT/UNSAT (COMMENTS)
(** Indicates critical step)
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 Procedure, AND SCRAM the reactor (Section II, Step 3.1)
On 2H11-P603, the Operator INSERTS a MANUAL SCRAM (depresses at least one scram 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.
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 Attributes JPM CONTENT 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.
- 3.
- 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.