Text

10-Post Examination Comments
	ML25013A028
Person / Time
Site:	Comanche Peak
Issue date:	10/31/2024
From:	Heather Gepford; NRC/RGN-IV/DORS/OB
To:	Peters K; Vistra Operations Company
References
	CP-202400430, TXX-24079
	Download: ML25013A028 (1)
	v • d • e

CP-202400430 TXX-24079 November 07, 2024 U.S. Nuclear Regulatory Commission Regional Administrator, Region IV 1600 East Lamar Boulevard Arlington, Tx 76011-4511 ATTN: Mr. John Kirkland

Subject:

Comanche Peak Nuclear Power Plant (CPNPP)

Docket Nos. 50-445 and 50-446 Transmittal of Licensed Operator Examination Materials Comanche Peak Nuclear Power Plant Steven K. Sewell Nuclear Site Vice President P.O. Box 1002 6322 North FM 56 Glen Rose, TX 76043 Office: 254.897.6113 Ref 10 CPR 55.5(b)(2) 10 CPR 55.40(a)

Reference:

NUREG-1021, Revision 12, OL Examination Standards for Power Reactors

Dear Mr. Kirkland:

Enclosed please find the attached 2024 Licensed Operator Post Examination Package, Written, per NUREG-1021 Rev 12 ES-4.4-B.7 for the initial operator licensing written examinations administered on October 31, 2024, at Comanche Peak Nuclear Power Plant (CPNPP) for LC30. These examinations were graded and are submitted based on guidance in the Reference, with concurrence of training supervision. CPNPP requests that the written examinations and operating tests be withheld from public disclosure for the allowed two-year period.

This communication contains no new licensing basis commitments regarding Comanche Peak Units 1 and 2.

If there are any questions concerning this submittal, contact Mr. Jason Smith at (254) 897-6259 or at Jason.Smith@vistracorp.com.

6555 SIERRA DRIVE IRVING, TEXAS 75039 VlSTRACORP.COM

TXX-24079 Page 2 of 2 Sincerely,

Enclosure:

2024 Licensed Operator Post Examination Package, Written cc:

NRC Regional Administrator, Region IV NRC Chief Operations Branch NRC Project Manager, CPNPP NRC Senior Resident Inspector, CPNPP NRC Resident Inspector, CPNPP

EXAM ITEM ANAL VSIS Exam Matcode:

N/A, LC 30 ILOT NRC Number of Trainees:

14 Exam Date:

_1_0_/_3_1/_2_4 ____ _

Issue Report n z.oZH-OOf,<&1"1 Training Program:

ILOT Exam Validated:

IZl Yes No Basis for Exam Analysis:

IZl Any question > 50% failure rate (Complete Section A) 0 > 25% overall exam failure rate (Complete Section B) 0 Program Owner request (Complete Section B)

D Any question having multiple correct answers or no correct answer (Complete Section A)

SECTION A Question Failure Basis ID Rate(%)

Code Corrective Action 15 69 G

None. Question is not flawed and adequately covered by associated objectives in lesson material.

23 64 G

None. Question is not flawed and adequately covered by associated objectives in lesson material.

90 62 G

None. Question is not flawed and adequately covered by associated objectives in lesson material.

Basis Codes:

A. Insufficient training for the learning objective tested E. Incorrect answer in the exam key B. Learning objectives not adequately covered in the F. More than one correct answer lesson plan G. Question acceptable C. Poorly worded or invalid learning objective H. Other (state reason in table or on additional sheet)

D. Poorly worded or invalid test item or answer SECTION B Conclusion Summary Corrective Action NOTE: Any significant changes to the exam require the exam to formally be reviewed and approved.

Significant changes imply any changes other than minor wording clarification.

Performed By:

Scott Dimeler Date:

11-5-24 NTG-104-7 Rev 13 Page 1 of 1

LCO 30 NRC WRITTEN EXAM ANALYSIS LC30 NRC RO RO RO RO RO RO SRO SRO SRO SRO SRO SRO SRO SRO PASS Quest ANS 1

2 3

4 5

6 1

2 3

4 5

6 7

8 RATE I

RO 1

B B

B 100%

I ANS 2

B B

B 8

B B

B 100%

3 B

B 8

B B

8 B

100%

4 C

C C

C D

C C

93%

5 A

A A

C A

93%

6 D

D D

D B

D D

93%

7 A

B A

A C

B B

A B

A A

B A

57%

8 C

C C

C A

93%

9 B

8 B

B B

A B

B 8

B B

93%

10 C

C C

100%

11 C

C C

D C

C C

93%

12 C

C B

C C

D D

C C

D C

71%

ii 13 D

D D

D B

D D

93%

14 B

D B

B C

B B

B D

D D

64%

15 C

A A

C D

A A

C C

A D

21%

16 C

C C

100%

17 A

A A

100%

18 C

C C

A C

C C

93%

19 B

B D

D B

8 D

B B

8 B

B D

71%

20 A

A C

A A

A D

A A

C A

A A

79%

21 D

D D

D C

D D

C C

D C

D D

71%

22 B

8 B

B B

100%

23 D

A A

D A

D B

B D

D D

A B

36%

24 C

C C

100%

25 A

A C

A A

C A

A D

B A

A A

71%

26 C

C C

100%

27 A

A A

100%

28 A

A A

A B

A A

A D

86%

29 C

C C

100%

30 A

A B

A A

A D

A A

86%

31 A

A A

A C

A A

93%

32 C

C D

D C

C C

79%

33 C

C A

C C

93%

34 D

D D

D A

D D

93%

35 C

C C

A C

C C

93%

36 D

D A

D D

D A

D D

D A

71%

37 B

B B

B 8

B B

B D

8 B

B B

93%

38 C

C C

100%

39 D

D D

100%

40 B

B B

100%

41 B

B B

100%

42 D

D D

100%

43 A

A A

B A

A C

A A

86%

44 D

D D

D C

D D

93%

45 B

B B

100%

46 B

D D

B B

D D

B B

57%

47 D

D D

C D

D D

93%

48 B

B B

B C

D A

B A

A B

57%

49 A

C A

A B

A A

79%

so D

D C

D D

93%

51 D

D D

D B

D D

93%

52 D

D D

100%

53 C

C C

100%

54 D

D D

100%

55 C

C C

100%

56 D

D C

C C

D D

71%

57 B

A B

B B

A B

B B

B A

71%

58 A

A A

100%

59 A

A A

A C

A A

93%

60 C

C C

100%

61 B

B B

A B

D C

B B

79%

LCO 30 NRC WRITTEN EXAM ANALYSIS 62 D

C D

D D

D C

D D

86%

63 D

D D

100%

64 C

D A

C C

86%

65 A

A A

C A

A A

93%

66 D

C C

C D

D C

D D

C D

D C

57%

67 A

A A

A D

A A

A D

A C

D A

C C

57%

68 A

A A

100%

69 B

B B

100%

70 B

B B

D B

B B

93%

71 D

D A

B D

D A

D B

D D

B D

B A

50%

72 C

C C

B C

C C

C B

B B

C C

B C

64%

73 B

B B

100%

74 A

A A

A C

A A

C A

86%

75 C

C C

100%

I SRO 76 C

C C

D C

C C

88%

I 77 C

C C

C D

C C

88%

78 D

D D

100%

79 C

C C

100%

80 B

B B

100%

81 A

A A

100%

82 A

A A

100%

83 C

C C

100%

84 A

A A

100%

85 B

D B

B B

88%

86 A

D A

A A

88%

87 A

A A

A B

A A

B A

75%

88 D

D D

100%

89 B

B B

A B

B B

88%

90 C

B A

D C

A C

38%

91 B

A B

B B

88%

92 D

D D

100%

93 C

C C

100%

94 A

C D

A A

D A

63%

95 D

B B

D D

D B

63%

96 B

8 B

B B

8 B

B B

100%

97 B

D B

B B

B D

63%

98 A

A A

100%

99 B

B B

B C

B B

B D

75%

100 D

D D

100%

SCORE RO 87'/,

79%

88%

87%

89%

71%

93%

87%

89%

88%

92%

95%

85%

SRO N/A N/A NIA NIA NIA NIA 72%

88%

92%

88%

96%

88%

TOT 87%

79%

88%

87%

89%

71%

88%

87%

90%

89%

91% 95%

86%

RO RO RO RO RO RO SRO SRO SRO SRO SRO SRO SRO SRO 1

2 3

4 5

6 1

2 3

4 5

6 7

8 AVG RO Sect 87%

AVG SRO Sect 88%

AVG TOT Sect 87%

CP-2024 SRO/RO NRC WRITTEN EXAM ANALYSIS RO Question 15 (PASS RATE - 21%)

The KIA (022 SF5 CCS Containment Cooling System -A2.04) could only be met using an Alarm Response Procedure. This makes the Level of Difficulty (LOO) harder than asking something from an Abnormal Procedure. Comanche Peak Validators and Facility Representative graded this Question LOO at 3.0. The question is technically correct and 2 of 3 distractors were selected by the candidates showing the distractors were good. The question was missed due to a general knowledge gap.

RO Question 23 (PASS RATE - 36%)

The question was an LCO "above the line question" for Station Service Water. The question was technically correct. The question was missed due to a general knowledge gap.

SRO Question 90 (PASS RATE - 38%)

The SRO question was a 10 CFR 55.43.b.5 (Procedure Selection) during EOS-0.2A (NATURAL CIRCULATION COOLDOWN). The question was technically correct and involved a procedure (EOS-0.2A) that doesn't have a lot of focus in the ILOT program.

CP-2024-10 NRC WRITTEN EXAM Q50 Recommend Changing the Correct Answer from 'D' to 'C' Problem During the exam review, it was discovered that Q50 was affected by information not considered during the original exam review and approval.

Justification The information centers around Part 2 of question 50.

Part 2 asks where the CCP will be discharging "after ECCS is terminated per ECA-1.1 ".

ECCS termination refers to placing ECCS pumps in standby.

Part 2 was intended to ask the candidate for the FINAL alignment of charging after ECCS is terminated.

o However, the wording in Part 2 is technically asking where the CCP is discharging as soon as the ECCS pumps are placed in standby.

o ECCS pumps are placed in standby per ECA-1.1 Step 23.

o At this point, CCP discharge is still discharging through 1 /1-8801 A/B.

o Normal Charging alignment is established at Step 25.

o Clarification to Part 2 was given to most candidates during the examination. The clarification did not recognize the new information and does not change the fact that the correct answer is C (not Das initially keyed).

Solution Change the Correct Answer from 'D' to 'C' Per NUREG10-21 REV 12, ES-4.4, "newly discovered technical information supports a change in the answer key".

EXAMINATION ANSWER KEY CP-2024 SRO NRC WRITTEN EXAM (APPROVED) 50 Points: 1.00 The Crew is terminating ECCS per ECA-1.1A (LOSS OF EMERGENCY COOLANT RECIRCULATION) Step 21, "Check If ECCS Can Be Terminated" Per ECA-1.1A, which of the following completes the statements below?

After ECCS is terminated, _(1 )_ CCP(s) will be running discharging to the RCS through

_(2)_.

(1)

(2)

A.

two 1 /1-8801 A/B (CCP Injection Line Isolation Valves)

B.

two 1/1-8105/8106 (Charging Line Isolation Valves)

C.

ONLY one 1 /1-8801 A/B (CCP Injection Line Isolation Valves)

D.

ONLY one 1/1-8105/8106 (Charging Line Isolation Valves)

Answer:

D Pa e 173 of 334

EXAMINATION ANSWER KEY CP-2024 SRO NRC WRITTEN EXAM (APPROVED)

I Answer Explanation DISTRACTOR ANALYSIS:

A.

Incorrect but plausible. All distractors are possible flow paths using letdown valves and CCP discharges. Consequently, all distractors are plausible.

B.

Incorrect but plausible. All distractors are possible flow paths using letdown valves and CCP discharges. Consequently, all distractors are plausible.

C.

Incorrect but plausible. All distractors are possible flow paths using letdown valves and CCP discharges. Consequently, all distractors are plausible.

D.

Correct. Per ECA-1.1A, after ECCS is terminated, ONLY one CCP will be running discharging to the RCS through 1/1-8105/8106 (CHRG PUMP TO RCS ISOL VLVs).

Question Number:

50 Tier:

1 Group 1

KIA:

E11 Loss of Emergency Coolant Recirculation - EA1.09 Ability to operate and/or monitor the following as they apply to Loss of Emergency Coolant Recirculation: PRZ LCS Importance Rating:

3.3 10 CFR Part 55:

41.10 10 CFR 55.43.b N/A KIA Match:

The KIA is matched because the candidate must know the charging lineup (part of PRZR LCS) after ECCS is terminated per ECA-1.1A (LOSS OF EMERGENCY COOLANT RECIRCULATION).

High Cog N/A Justification:

Technical ECA-1.1A REV 9

References:

Proposed references None to be provided:

Pa e 174 of 334

EXAMINATION ANSWER KEY CP-2024 SRO NRC WRITTEN EXAM (APPROVED)

Learning Objective:

L021 ERGC11 (ECA 1.1, Loss of Erner. Recirc) 2 DISCUSS the applicability of ECA-1.1 to include: Modes, RHR/SI Status, and the required action If ECA-1.1 is otherwise used.

Cognitive Level:

Higher __

Lower 3.1 Question Source New Modified Bank X

Bank Question History:

Comments:

Pa e 175 of 334

EXAMINATION ANSWER KEY CP-2024 SRO NRC WRITTEN EXAM (APPROVED)

Question 50 References ORIGINAL QUESTION l+/-t 4------ ( MC ___ f * ---- LOCA has occurred---------------------------------------------------------------------------------------;

Loos of Emergency Coolant Recirculation in progress on Unit 1 i

i

RCS pressure = 900 psig and lowering i

l Cootainment pressure = 6 psig and slowly rising i

RCS cooldow)l to Cold Shutdown in progress i

1 ECCS train in sefVice i

i RVUS 11 in abow core plate ligh1 is LIT I

I I

t t

I I

t l

I I

t I

I I

l i

l i The MINIMUM RCS subcoolf.ng required to terminate EGGS is ___

i L_ ______ J _______ j; ~ ;:s

~ tenninated, CCP :::::::::::: __ :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ___ b 1

l 1njection Line lsdla1ion valves {1/1-3801AJE) are closed first, 1hen Charging line Isolation valves l

___ _J (1/1-8105 andJ/1-3106) are o ened to establish the normal charQinq tlowpath _________________________ _:

B. : 55¢F

! l Charging line Isolation valves (1/1-8*t05 and 1/1-8106) are opeood first, then lnjeciion Line Isolation !

[_ ____ ] valves (1l1-8801A/B) are closed to establish Ole normal charciino flowpath

C. : 1,05 ~F i

Injection Line lsola1ion valves (1/1-3801AJE) are closed first, then Charging line Isolation valves L ____ j (1/1-8105 and 1/1--8106) are opened to establish 1he normal charQinQ flowoath

D. f 105 ¢F i

i Charging line Jsofation valves (111-8105 and 1/1-8106) are opened first, then Injection Line Isolation l

_ ____ J valves (1/1-8801A/B) are closed to establish Ole normal charciirlO flowpath

AllSv,er: ___.r c ___________________________________________________________________________________________________ :

Answer ExpF:anation:

A.

1;;1 part is incorrect because per ECA 1.1A with adverse containmen1 conditions, 1he minimum RCS SCM is 105 °F. It is plausible because if the queslion were asking minimum RCS SCM 1o start a RCP, it would be correct -ztt part is correct. The CCP discharge to the injection lines are closed first, then discharge to the normal injection How pa1h are opened.

B.

1:r.1 part is incorrect out plau;sibte (see A). ~

part is incorrect because the CCf> injection line isolalion valves are closed before the normal injection line isolation valves are opened. It is plausible because it would appear that you are making Ole CCP run a1 shutoff head while you marnpulate valves, The mini-flow valves are aligned p:rtor 1o this step.

C.

1s1 part is correct. Per ECA 1.1 A, with adverse containment coooilions, the mfnimum RCS SCM to terminate ECCS is 105 °F. 21)rl part is correct (see A).

D.

1:r.1 part is correct (see C). 2nd pan is incorrect but plausible (see B).

Pa e 176 of 334

CPNPP PROCEDURE NO.

EMERGENCY RESPONSE GUIDELINES UNIT 1 ECA-1. lA LOSS OF EMERGENCY COOLANT RECIRCULATION REVISION NO. 9 PAGE 12 OF 81

-, STEP:----~: ACTION/EXPECTED RESPONSE:---------~: RESPONSE NOT OBTAINED:....... --.....

21 Check If ECCS Can Be Terminated:

a. RVLIS indication - GREATER THAN OR EQUAL TO 11 IN ABOVE CORE PLATE LIGHT LIT

b. RCS subcooling - GREATER THAN 75°F (105°F FOR ADVERSE CONTAINMENT) 22 Establish Instrument Air And Nitrogen To Containment:

a. Establish Instrument air:

1) Verify air compressor running.

2) Manually establish instrument air to containment.

b. Establish Nitrogen:

1) Verify ACCUM le4 VENT CTRL, 1-HC -943 - CLOSED

2) Open SI/PORV ACCUM N2 ISOL VL V, l / 1 -8 8 8 0.

23 Stop ECCS Pumps And Place In Standby:

SI pumps

RHR pumps

All but one CCP

a. Go to Step 26.

b. Establish minimum ECCS flow to remove decay heat.

Perform the following:

1) Determine minimum ECCS flow required from Table in.

2) Establish minimum ECCS flow.

3) Go to Step 26.

1) Manually start one air compressor and align valves as appropriate.

1) Manually close valve.

CPNPP PROCEDURE NO.

EMERGENCY RESPONSE GUIDELINES UNIT 1 ECA-1. lA LOSS OF EMERGENCY COOLANT RECIRCULATION REVISION NO. 9 PAGE 13 OF 81

-I STEP:-----.... : ACTION/EXPECTED RESPONSE :...... -------1: RESPONSE NOT OBTAINED :-------t

[lJ] 24 Isolate CCP Injection Line Flow Path:

a. Check CCP - SUCTION ALIGNED TO RWST

b. Open CCP miniflow valves:

1/1 -8110

1/1 -8111

-CONT 24 -

a. IT CCP suction is supplied from the RHR pump discharge in ECCS recirculation mode, THEN perform the following:

1) Close 1-HC -182 SEAL WTR PRESS CTRL VALVE.

2) Open charging line isolation valves, 1/1 -8105 and 1/ 1 -810 6.

3) Place charging flow control valve in manual and 35%

demand.

4) Close the CCP injection line isolation valves:

1/1 -8801A

1/1 -8801B

5) Establish and maintain at least 70 gpm charging flow for CCP minimum flow protection.

6) Adjust RCP seal flow to RCPs to maintain between 6 gpm and 13 gpm.

7) Go to Step 26.

CPNPP PROCEDURE NO.

EMERGENCY RESPONSE GUIDELINES UNIT 1 ECA-1.lA LOSS OF EMERGENCY COOLANT RECIRCULATION REVISION NO. 9 PAGE 14 OF 81 H

STEP:

ACTION/EXPECTED RESPONSE:---------~: RESPONSE NOT OBTAINED:1------1

[lJ] 24

c. Close the CCP injection line

[lJ] 25 isolation valves:

1/1 -8801A

1/1 -8801B Establish Charging Flow Path:

a. Open charging line isolation valves, 1/1 -8105 and 1/1 -8106.

b. Adjust charging flow control valve to establish charging flow.

c. Adjust RCP seal flow to RCPs to maintain between 6 gpm and 13 gpm.

d. Close CCP alternate miniflow isolation valves, 1/1 -8511A and 1/ 1-85 llB.

c. Perform the following:

1) Verify CCW flow from the RCP thermal barriers.

2) Stop the operating CCP.

3) Close CCP Injection Line isolation valves. IF the CCP Injection Line isolation valves will NOT close, THEN be aware of possible high radiation conditions and locally close the valves (SFGD 810, S. Penetration Room).

4) Start the CCP and ensure RCP seal injection flow.

EXAM FEEDBACK Question Information:

Originator Exam Material Code:

CP-2024-10 Question Number:

50 Or Full Question ID Number:

Description of Problem: (Be as detailed as possible and include references when available)

ECA-1.1 Step 21 is part of major action, ({Initiate Cooldown To Cold Shutdown". It is not a major action to ({Terminate ECCS". Therefore, if the AER is obtained in Step 21, injection is through the ECCS flow path at the completion of Step 23.

Cameron Singleton 10/31/24 Name Date Evaluator Recommended Disposition:

A. Examination/Examination Key:

Change Key from 'D' to 'C'.

B. Examination Bank:

Change Key from 'D' to 'C' C. Other:

N/A Scott Dimeler 10/31/24 Name Date

1. Prepare and submit disposition for approval.

2. After approval, complete approved actions, notify the originator and assigned instructor of the examination feedback resolution and file original with exam Approval Disposition:

Approval

~As recommended

-.\\~~\\A( As:~JL I r:t vWQ ~

Training Superv~or (Print/Sign)

D Other/ additional I\\ /--, /1,c, Date NTG-104-5 Rev. 9 Page 1 of 1

CP-2024-10 NRC WRITTEN EXAM Q66 Recommend Removing Q66 From the Exam Problem During the exam review, it was discovered that Q66 had an unclear stem that confused the applicants and resulted in not enough information to determine the correct answer.

This unclear stem was not recognized during the original exam review and approval. Q66 was replaced per the Chief Examiner's comments from the T-75 Exam Submittal. Consequently, the new question did not receive full validation.

Justification The information centers around Part 2 of question 66.

Since Q66 was a Tier 3 question, it was written as generically as possible and tested the guidance in ODA-102 (CONDUCT OF OPERATIONS).

The question stem has the crew initially in ABN-302 (FEEDWATER, CONDENSATE, HEATER DRAIN SYSTEM MALFUNCTION) due to a tripped condensate pump. Two generic white alarms are received, and the candidate must prioritize the alarms per KIA G2.4.45.

The intent of the question was to test the statement in ODA-102, "Alarm announcements not associated with the flow of ABN/ERG communications should be prioritized. When conditions permit, those alarms not previously announced but which are operationally significant should be addressed".

Consequently, the keyed answer for Part 2 was that priority should be given to the alarm NOT associated with ABN-302.

Unfortunately, the information in the question stem does not allow the candidate to analyze or determine if the alarm associated with ABN-302 requires entry into additional ABNs/ERGs. If the alarm had required entry into an ABN / ERG, then this alarm would be the priority.

ABN-302 also states, "a trip of a condensate pump at high power has a high probability of losing both Main Feed Water Pumps resulting in a Plant Trip" which added to the confusion for Part 2.

Solution Remove Q66 from the Exam Per NUREG10-21 REV 12, ES-4.4, "an unclear stem that confused the applicants or did not provide all the necessary information (to assist in determining whether an unclear stem confused the applicants, closely evaluate any applicant questions asked during the examination; also evaluate the question stem to determine whether the information provided could reasonably result in the applicant misunderstanding the intent of the question or the validity of the answer choices) in the answer key".

EXAMINATION ANSWER KEY CP-2024 SRO NRC WRITTEN EXAM (APPROVED) 66 Points: 1.00 The Crew is performing ABN-302 (FEEDWATER, CONDENSATE, HEATER DRAIN SYSTEM MALFUNCTION)

A condensate Pump has TRIPPED The Turbine has run back to 60% Power ALL ABN-302 Initial Operator Actions have been performed At time 09:00 A WHITE Alarm associated with performance ABN-302 has just been received A WHITE Alarm NOT associated with performance ABN-302 has just been received Per ODA-102 (CONDUCT OF OPERATIONS), which of the following completes the statement below?

During transient conditions associated with performance of ABN-302, the master silence button may be used _(1 )_ Unit Supervisor permission.

At 09:00, WHITE alarm announcements _(2)_ with the flow of ABN-302 should be prioritized.

A.

B.

C.

D.

Answer:

D (1) without without ONLY with ONLY with Pa e 224 of 334 (2) associated NOT associated associated NOT associated

EXAMINATION ANSWER KEY CP-2024 SRO NRC WRITTEN EXAM (APPROVED)

I Answer Explanation DISTRACTOR ANALYSIS:

A.

Incorrect but plausible. For Part 1, if the reactor had tripped and performance of EOP-0.0A was in progress, then the master silence button may be used without Unit Supervisor Approval. For Part 2, the candidate could incorrectly conclude that alarms associated with the transient should take priority.

B.

Incorrect but plausible. For Part 1, if the reactor had tripped and performance of EOP-0.0A was in progress, then the master silence button may be used without Unit Supervisor Approval. Part 2 is correct.

C.

Incorrect but plausible. Part 1 is correct. For Part 2, the candidate could incorrectly conclude that alarms associated with the transient should take priority.

D.

CORRECT.

For Part 1 and per ODA-102, "during transient conditions, it is desirable to silence the alarms as soon as practical to allow clear communications. It is not required to verbalize "Silencing." The master silence button may be used when entering EOP 0.0A/B; other uses require the Unit Supervisor permission." This would be true during the performance of any ABN. For Part 2 and per ODA-102, "Alarm announcements not associated with the flow of ABN/ERG communications should be prioritized. When conditions permit, those alarms not previously announced but which are operationally significant should be addressed."

Question Number:

66 Tier:

3 Group KIA:

G2.4.45 Ability to prioritize and interpret the significance of each annunciator or alarm Importance Rating:

10 CFR Part 55:

10 CFR 55.43.b KIA Match:

High Cog Justification:

RO 4.1 41.10 N/A The KIA is matched because the candidate must understand how to prioritize alarm announcement during a transient per ODA-102.

The candidate must analyze an event timeline an apply the requirements of ODA-102.

Pa e 225 of 334

EXAMINATION ANSWER KEY CP-2024 SRO NRC WRITTEN EXAM (APPROVED)

Technical

References:

ODA-102 Proposed references None to be provided:

Learning Objective:

N/A Cognitive Level:

Higher _lQ__

Lower Question Source New X

Modified Bank Bank Question History:

Comments:

Pa e 226 of 334

CPNPP OPERATIONS DEPARTMENT ADMINISTRATION MANUAL CONDUCT OF OPERATIONS ATTACHMENT 8.G PAGE 4 OF 6 PROCEDURE NO.

ODA-102 REVISION NO. 40 PAGE 97 OF 155 INFORMATION USE OPERATIONS DEPARTMENT ALARM RESPONSE EXPECTATIONS 3.0 Alarm Response 3.1 Control Room Alarm Response (Cont.)

Alternate Alarm Response Alternate alarm response techniques are allowed provided they are briefed or pre-briefed for unique situations, and they adhere to the premise for "normal alarm response" expectations in that alarms are understood and attended to in a manner commensurate with the safety significance of the alarm.

Pre brief alarm response expectations for high noise evolutions, i.e., local response to diesel alarms during runs.

Alarm responses for repetitive alarms during major plant evolutions, i.e.,

shutdowns, startups and power ramps.

Alarm responses associated with equipment removed from service during forced or refueling outages.

3.2 Transient Annunciator Response During transient conditions, it is desirable to silence the alarms as soon as practical to allow clear communications. It is not required to verbalize "Silencing." The master silence button may be used when entering EOP 0.0A/B; other uses require the Unit Supervisor permission. When the transient conditions have stabilized the audible alarms should be reinstated and alarms acknowledged. Unit Supervisor permission is required to use the master silence button again if the master silence alarm times out (four minutes).

Following completion of ABN Initial Operator Actions /ERG Immediate Actions, annunciators should be acknowledged and cleared when conditions stabilize.

This will allow the crew to identify alarms caused by subsequent failures.

During ABN/ERG implementation or transients where multiple annunciators are sporadically received, the RO/BOP should assess all annunciators and inform the Unit Supervisor of any annunciators that:

Require entry into additional ABNs/ERGs.

Indicate failure of an ESF component.

Indicate ESF actuations have occurred or may be needed.

Require entry or escalation into the Emergency Plan.

Alarm announcements not associated with the flow of ABN/ERG communications should be prioritized. When conditions permit, those alarms not previously announced but which are operationally significant should be addressed.

CPNPP UNIT 1 AND 2 PROCEDURE NO.

ABNORMAL CONDITIONS PROCEDURES MANUAL FEEDWATER, CONDENSATE, HEATER DRAIN SYSTEM MALFUNCTION 3.2 Automatic Actions

a. Turbine runback at 35% per minute to 60% power.

REVISION NO. 17 NOTE: Opening the LP FW HTR BYP VLV will reduce unit efficiency resulting in an increased mismatch between reactor and turbine power.

ABN-302 PAGE 11 OF 83

b. A low feedwater pump suction pressure 250 psig and greater than 15% turbine power will open !:!-PV-2286 (to bypass the low pressure heater strings) and close the condensate reject and recirc valves (to provide maximum condensate pressure at the feedwater pump suction).

!:!-HS-2286, LP FW HTR BYP VLV

!:!-HS-2211/12, CNDS REJECT VLV

!:!-ZL-2239, CNDS PMP RECIRC VLV

c. A low feedwater pump suction pressure ::::280 psig will open !:!-PV-2242, Li!:!_ CNDS POL FILT BYP PRESS CTRL VLV.

d. A trip of a condensate pump at high power has a high probability of losing both Main Feed Water Pumps resulting in a Plant Trip.

Section 3.2

EXAM FEEDBACK Question Information:

Originator Exam Material Code:

CP-2024-10 Question Number:

66 Or Full Question ID Number:

Description of Problem: (Be as detailed as possible and include references when available)

ABN-302 3.2D provides "a trip of a condensate pump at high power has a high probability of losing both Main Feed Water Pumps resulting in a Plant Trip". Therefore, the RO should notify the US Of associated White Alarms that would be precursors of a RX Trip (which is likely).

Cameron Singleton 10/31/24 Name Date Evaluator Recommended Disposition:

A. Examination/Examination Key:

Remove Question from the exam.

The information in the question stem does not allow the candidate to analyze or determine if the alarm associated with ABN-302 requires entry into additional ABNs/ERGs. If the alarm had required entry into an ABN / ERG, then this alarm would be the priority.

B. Examination Bank:

Revise Question to remove stem uncertainty.

C. Other:

N/A Scott Dimeler 11/5/24 Name Date

1. Prepare and submit disposition for approval.

2. After approval, complete approved actions, notify the originator and assigned instructor of the examination feedback resolution and file original with exam Approval Disposition:

Approval

~As recommended

\\u~1 (u'l_l <:,""j L £ )J\\r~~O.

Training Su~rvi9or ((,;nt/SignJ -

D Other/ additional n/1Lu1 Date NTG-104-5 Rev.9 Page 1 of 1

ML25013A028

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