ML15295A313

2015-10 Post Examination Analysis

ML15295A313
Person / Time
Site:	South Texas
Issue date:	10/02/2015
From:	Vincent Gaddy Operations Branch IV
To:
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Download: ML15295A313 (7)

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LOT 20 NRC EXAM ANALYSIS - 9/24/2015 Bank # RO# SRO# ANSWER A B C D Total Missed 2392 1 D 2 2 37 2 C 0 2395 3 A 2 1 3 2393 4 A 1 1 2394 5 D 1 1 1577 6 B 2 2 2396 7 D 2 2 214 8 B 1 1 2397 9 D 0 2398 10 C 1 1 2 2399 11 B 1 3 4 28 12 C 0 2400 13 C 0 1 14 B 0 2401 15 A 2 2 2402 16 D 3 3 787 17 C 0 2403 18 D 0 2404 19 A 0 2405 20 B 1 1 2406 21 D 1 1 2407 22 B 0 470 23 A 3 3 2408 24 A 7 1 8 1685 25 B 1 1 2 2369 26 A 1 4 5 1913 27 D 1 1 2 2370 28 C 1 1 2409 29 D 7 1 1 9 1739 30 C 1 1 3 5 1871 31 B 0 160 32 A 0 2371 33 C 2 2 2372 34 D 1 1 2 2373 35 C 0 1359 36 B 1 1 2429 37 B 0 123 38 B 4 4 1675 39 C 0 1668 40 A 0 2410 41 D 2 2 2435 42 D 0 2436 43 A 8 8

LOT 20 NRC EXAM ANALYSIS - 9/24/2015 Bank # RO# SRO# ANSWER A B C D Total Missed 2374 44 B 2 1 3 1327 45 B 0 1083 46 C 0 2411 47 D 0 2375 48 A 0 1503 49 C 1 1 2 2412 50 D 1 3 4 1677 51 C 1 1 2376 52 A 0 1329 53 A 0 2378 54 B 7 3 10 2379 55 D 4 4 4 12 2380 56 D 0 2381 57 C 1 1 1281 58 C 0 2413 59 C 1 1 2382 60 A 1 1 92 61 A 0 2414 62 C 0 484 63 D 1 1 2383 64 A 1 5 6 2384 65 B 1 6 7 2385 66 D 4 1 3 8 2415 67 A 1 1 2386 68 C 1 2 3 6 2387 69 C 3 1 4 2388 70 D 7 1 8 2416 71 A 1 1 1110 72 D 1 1 2417 73 C 0 2418 74 A 3 3 2419 75 B 0 230 76 D 1 1 2420 77 C 1 1 2140 78 B 0 185 79 C 0 2430 80 B 2 2 2421 81 A 0 2389 82 C 0 2422 83 D 0 1099 84 D 0 2423 85 C 1 1 2390 86 A 3 1 4 1277 87 A 1 1

LOT 20 NRC EXAM ANALYSIS - 9/24/2015 Bank # RO# SRO# ANSWER A B C D Total Missed 2391 88 A 1 3 4 1727 89 B 0 1636 90 D 0 2424 91 C 1 1 2434 92 B 1 1 2 2425 93 A 4 4 2431 94 A 1 1 2426 95 C 1 1 2 2432 96 A 3 3 2427 97 D 1 1 2 2433 98 D 3 2 5 2428 99 C 0 413 100 A 1 1 RO #20 - 1 candidate chose distracter D; (correct answer is B).

This question was only missed by one student, however, its being added to this list because two students asked about the position of the SSPS MRDS Switch during the exam.

Question is based on the knowledge of Fuel Handling procedures and radiation monitor response to a Fuel Handling accident.

While investigating the students question during the exam it could not be explicitly determined if the student needed to know about the MRDS switch. It was decided to tell the students to read the question as stated. There was some thought given during the exam to change the correct answer to D because of steps in the Containment Purge procedures. However, further investigation of the question after the exam revealed the following:

• Depending on how you arrive at the situation, the MRDS switch could be in either DEFEAT ALL or DEFEAT/CVI AVAIL. 0POP03-ZG-0007 gives the option to place the MRDS switch in either position.

• Placing containment purge in service in modes 5, 6, and defueled specifically require placing the MRDS switch to DEFEAT ALL per the normal operating procedures.

However, if containment purge had been placed in service in mode 4, there is no specific requirement to go back and place MRDS to DEFEAT ALL.

Since the intent of the question was that CVI is normally available under the given conditions and that the vast majority of the students answered the question that way, no changes to the question will be made.

For future use of the question the question stem will be revised for clarification, however, no changes are being made to the LOT 20 NRC Exam.

LOT 20 NRC EXAM ANALYSIS - 9/24/2015 RO #24 - 7 candidates chose distracter B; 1 candidate chose distracter C; (correct answer is A).

Question is based on the knowledge of Derived Air Concentration and its contribution to the overall dose a worker might receive including biological effects. With most candidates choosing distractor B indicates a lack of knowledge in the amount of dose a worker could receive given a concentration of 1 DAC/HR. Training is given on Derived Air Concentration during fundamentals training. This question does pose some difficulty above the rating listed (3) but does the match the KA given.

No changes to the exam are warranted.

RO #29 - 7 candidates chose distracter A; 1 candidate chose distracter B; 1 candidate chose distracter C; (correct answer is D).

Question is based on 0POP04-CV-0003, Emergency Boration. All distracters chosen indicate a lack of knowledge with the flow path of the procedure. Training is given on Off-Normal Procedures and their basis during LOT 505, Off-Normal Procedure Training.

No changes to the exam are warranted.

RO #43 - 8 candidates chose distracter B; (correct answer is A).

Question is based on TS 3.8.2.1. Applicants choosing distracter B indicate a lack of knowledge on how Class 1E Vital 120VAC affects the TS. Training is given during LOT 503 training for TSs.

No changes to the exam are warranted.

RO #54 - 7 candidates chose distracter C; 3 candidates chose distracter D; (correct answer is B).

Question is based on Instrument Air Compressor operation. The distractors chosen by the students indicates a lack of knowledge with setpoints associated directly with the IA Compressors. The setpoints associated with the IA Compressors are dependent on the Mode the IA compressor is in adding to the difficulty of the question. Training is given during systems training for LOT 202.26.

No changes to the exam are warranted.

RO #55 - 4 candidates chose distracter A; 4 candidates chose distracter B; 4 candidates chose distracter C; (correct answer is D).

Question is based on Residual Heat Removal Pump power supplies. The distractors were given in specific sides of the Load Centers making this question more difficult than the given rating.

(3) Training is given during systems training for LOT 201.36.

No changes to the exam are warranted.

LOT 20 NRC EXAM ANALYSIS - 9/24/2015 RO #66 - 4 candidates chose distracter A; 1 candidates chose distracter B; 3 candidates chose distracter C; (correct answer is D).

Question is based on knowledge of Conduct of Operations. The distractors chosen by the students indicates a lack of knowledge of when to notify the NRC Resident Inspector. Training is given during LOT 507 for Administrative Procedures.

No changes to the exam are warranted.

RO #70 - 7 candidates chose distracter A; 1 candidates chose distracter B; (correct answer is D).

Question is based on TS 2.1.1.2 for limits on peak fuel centerline temperature. Most students picked distractor A which indicates a lack of knowledge about the reduction of maximum peak centerline temperature over core life. Training is given during LOT 503 training for TSs.

No changes to the exam are warranted.

SRO #98 - 3 candidates chose distracter A; 2 candidates chose distracter C; (correct answer is D).

Question is based on knowledge of initial containment inspections. The question relates to a specific requirements among many responsibilities listed in the surveillance and the actual answer is an exemption given which adds to the difficulty of the question. Training is given during LOT 804 for SRO Duties and Responsibilities.

No changes to the exam are warranted.

LOT 20 NRC EXAM ANALYSIS - 9/24/2015 Bank # RO# SRO# ANSWER A B C D Total Missed 2392 1 D 2 2 37 2 C 0 2395 3 A 2 1 3 2393 4 A 1 1 2394 5 D 1 1 1577 6 B 2 2 2396 7 D 2 2 214 8 B 1 1 2397 9 D 0 2398 10 C 1 1 2 2399 11 B 1 3 4 28 12 C 0 2400 13 C 0 1 14 B 0 2401 15 A 2 2 2402 16 D 3 3 787 17 C 0 2403 18 D 0 2404 19 A 0 2405 20 B 1 1 2406 21 D 1 1 2407 22 B 0 470 23 A 3 3 2408 24 A 7 1 8 1685 25 B 1 1 2 2369 26 A 1 4 5 1913 27 D 1 1 2 2370 28 C 1 1 2409 29 D 7 1 1 9 1739 30 C 1 1 3 5 1871 31 B 0 160 32 A 0 2371 33 C 2 2 2372 34 D 1 1 2 2373 35 C 0 1359 36 B 1 1 2429 37 B 0 123 38 B 4 4 1675 39 C 0 1668 40 A 0 2410 41 D 2 2 2435 42 D 0 2436 43 A 8 8

LOT 20 NRC EXAM ANALYSIS - 9/24/2015 Bank # RO# SRO# ANSWER A B C D Total Missed 2374 44 B 2 1 3 1327 45 B 0 1083 46 C 0 2411 47 D 0 2375 48 A 0 1503 49 C 1 1 2 2412 50 D 1 3 4 1677 51 C 1 1 2376 52 A 0 1329 53 A 0 2378 54 B 7 3 10 2379 55 D 4 4 4 12 2380 56 D 0 2381 57 C 1 1 1281 58 C 0 2413 59 C 1 1 2382 60 A 1 1 92 61 A 0 2414 62 C 0 484 63 D 1 1 2383 64 A 1 5 6 2384 65 B 1 6 7 2385 66 D 4 1 3 8 2415 67 A 1 1 2386 68 C 1 2 3 6 2387 69 C 3 1 4 2388 70 D 7 1 8 2416 71 A 1 1 1110 72 D 1 1 2417 73 C 0 2418 74 A 3 3 2419 75 B 0 230 76 D 1 1 2420 77 C 1 1 2140 78 B 0 185 79 C 0 2430 80 B 2 2 2421 81 A 0 2389 82 C 0 2422 83 D 0 1099 84 D 0 2423 85 C 1 1 2390 86 A 3 1 4 1277 87 A 1 1

LOT 20 NRC EXAM ANALYSIS - 9/24/2015 Bank # RO# SRO# ANSWER A B C D Total Missed 2391 88 A 1 3 4 1727 89 B 0 1636 90 D 0 2424 91 C 1 1 2434 92 B 1 1 2 2425 93 A 4 4 2431 94 A 1 1 2426 95 C 1 1 2 2432 96 A 3 3 2427 97 D 1 1 2 2433 98 D 3 2 5 2428 99 C 0 413 100 A 1 1 RO #20 - 1 candidate chose distracter D; (correct answer is B).

This question was only missed by one student, however, its being added to this list because two students asked about the position of the SSPS MRDS Switch during the exam.

Question is based on the knowledge of Fuel Handling procedures and radiation monitor response to a Fuel Handling accident.

While investigating the students question during the exam it could not be explicitly determined if the student needed to know about the MRDS switch. It was decided to tell the students to read the question as stated. There was some thought given during the exam to change the correct answer to D because of steps in the Containment Purge procedures. However, further investigation of the question after the exam revealed the following:

• Depending on how you arrive at the situation, the MRDS switch could be in either DEFEAT ALL or DEFEAT/CVI AVAIL. 0POP03-ZG-0007 gives the option to place the MRDS switch in either position.

• Placing containment purge in service in modes 5, 6, and defueled specifically require placing the MRDS switch to DEFEAT ALL per the normal operating procedures.

However, if containment purge had been placed in service in mode 4, there is no specific requirement to go back and place MRDS to DEFEAT ALL.

Since the intent of the question was that CVI is normally available under the given conditions and that the vast majority of the students answered the question that way, no changes to the question will be made.

For future use of the question the question stem will be revised for clarification, however, no changes are being made to the LOT 20 NRC Exam.

LOT 20 NRC EXAM ANALYSIS - 9/24/2015 RO #24 - 7 candidates chose distracter B; 1 candidate chose distracter C; (correct answer is A).

Question is based on the knowledge of Derived Air Concentration and its contribution to the overall dose a worker might receive including biological effects. With most candidates choosing distractor B indicates a lack of knowledge in the amount of dose a worker could receive given a concentration of 1 DAC/HR. Training is given on Derived Air Concentration during fundamentals training. This question does pose some difficulty above the rating listed (3) but does the match the KA given.

No changes to the exam are warranted.

RO #29 - 7 candidates chose distracter A; 1 candidate chose distracter B; 1 candidate chose distracter C; (correct answer is D).

Question is based on 0POP04-CV-0003, Emergency Boration. All distracters chosen indicate a lack of knowledge with the flow path of the procedure. Training is given on Off-Normal Procedures and their basis during LOT 505, Off-Normal Procedure Training.

No changes to the exam are warranted.

RO #43 - 8 candidates chose distracter B; (correct answer is A).

Question is based on TS 3.8.2.1. Applicants choosing distracter B indicate a lack of knowledge on how Class 1E Vital 120VAC affects the TS. Training is given during LOT 503 training for TSs.

No changes to the exam are warranted.

RO #54 - 7 candidates chose distracter C; 3 candidates chose distracter D; (correct answer is B).

Question is based on Instrument Air Compressor operation. The distractors chosen by the students indicates a lack of knowledge with setpoints associated directly with the IA Compressors. The setpoints associated with the IA Compressors are dependent on the Mode the IA compressor is in adding to the difficulty of the question. Training is given during systems training for LOT 202.26.

No changes to the exam are warranted.

RO #55 - 4 candidates chose distracter A; 4 candidates chose distracter B; 4 candidates chose distracter C; (correct answer is D).

Question is based on Residual Heat Removal Pump power supplies. The distractors were given in specific sides of the Load Centers making this question more difficult than the given rating.

(3) Training is given during systems training for LOT 201.36.

No changes to the exam are warranted.

LOT 20 NRC EXAM ANALYSIS - 9/24/2015 RO #66 - 4 candidates chose distracter A; 1 candidates chose distracter B; 3 candidates chose distracter C; (correct answer is D).

Question is based on knowledge of Conduct of Operations. The distractors chosen by the students indicates a lack of knowledge of when to notify the NRC Resident Inspector. Training is given during LOT 507 for Administrative Procedures.

No changes to the exam are warranted.

RO #70 - 7 candidates chose distracter A; 1 candidates chose distracter B; (correct answer is D).

Question is based on TS 2.1.1.2 for limits on peak fuel centerline temperature. Most students picked distractor A which indicates a lack of knowledge about the reduction of maximum peak centerline temperature over core life. Training is given during LOT 503 training for TSs.

No changes to the exam are warranted.

SRO #98 - 3 candidates chose distracter A; 2 candidates chose distracter C; (correct answer is D).

Question is based on knowledge of initial containment inspections. The question relates to a specific requirements among many responsibilities listed in the surveillance and the actual answer is an exemption given which adds to the difficulty of the question. Training is given during LOT 804 for SRO Duties and Responsibilities.

No changes to the exam are warranted.