ML19149A198

04-Post Exam Comments

ML19149A198
Person / Time
Site:	Arkansas Nuclear
Issue date:	05/02/2019
From:	NRC Region 4
To:	Entergy Operations
References
Download: ML19149A198 (9)

Text

~ Entergy 2CAN051902 May 3, 2019 Mr. John Kirkland, Chief Examiner U.S. Nuclear Regulatory Commission Region IV 1600 East Lamar Blvd Arlington, TX 76011-4511 Entergy Operations, Inc.

1448 S.R. 333 Russellville, AR 72802 Tel 479-858-4124

SUBJECT:

Initial Examination - Completion of Post-Examination Analysis and transmittal of final examination materials for ANO, Unit 2 (CE)

Dear Mr. Kirkland,

Contained in this submittal are the post-examination materials as required per NU REG 1021 Rev. 11 for the Arkansas Nuclear One Unit 2 Initial license examination administered during the week of April 22, 2019 and the written examination administered on May 2, 2019. The items that were given after the written examination are not included in this submittal. Also enclosed is a copy of the examination security agreement that has not been finalized due to the need to obtain post examination signatures.

We also request that all examination materials related to the ANO Unit 2 2019 NRC Operator License Examinations be withheld from public disclosure for a period of two and one half years from this date.

Please contact Randal Martin at 479-858-6844 if you have any questions regarding this submittal.

Greg Kilpatrick Manager, Training Arkansas Nuclear One Attachments cc w/o attachments: ANO Licensing

CORRECT R1 R2 R3 R4 R5 R6 R7 S1 S2 S3 S4

% Missed 1

D B

9%

1 2

B 2

3 B

3 4

C 4

5 C

D 9%

5 6

A 6

7 B

7 8

B 8

9 A

9 10 B

A A

18%

10 11 A

11 12 A

C 9%

12 13 C

13 14 D

A 9%

14 15 A

B 9%

15 16 B

16 17 A

C C

C C

C 45%

17 18 D

C 9%

18 19 C

B B

B 27%

19 20 C

20 21 B

21 22 C

A A

D D

36%

22 23 C

23 24 B

D 9%

24 25 B

A A

18%

25 26 B

26 27 B

27 28 A

B B

D D

C 45%

28 29 A

B 9%

29 30 A

B B

B B

B 45%

30 31 C

A D

A A

A A

A 64%

31 32 A

B B

B 27%

32 33 D

33 34 C

34 35 C

D D

18%

35 36 D

36 37 D

A B

B B

B 45%

37 38 C

38 39 C

39 40 B

C C

18%

40 41 D

A 9%

41 42 D

B 9%

42 43 D

43 44 D

C 9%

44 45 B

45 46 A

46 47 C

47 48 C

48 49 B

49 50 C

A A

A 27%

50 51 B

51 52 A

52 53 C

D D

D D

D D

D D

73%

53 54 B

54 55 A

55 56 D

C 9%

56 57 C

57 58 A

D D

18%

58 59 A

C 9%

59 60 A

60 61 A

C C

C 27%

61 62 B

62 63 C

D D

D D

D D

55%

63 64 B

A 9%

64 65 B

D 9%

65 66 C

66 67 D

B 9%

67 68 B

68 69 A

B B

B C

B 45%

69 70 B

D A

18%

70 71 A

71 72 D

A 9%

72 73 A

B B

18%

73 74 D

74 75 B

A A

A 27%

75 76 A

76 77 B

77 78 C

78 79 D

79 80 C

80 81 A

81 82 A

82 83 D

C A

50%

83 84 B

84 85 B

A 25%

85 86 B

86 87 D

B 25%

87 88 B

A 25%

88 89 A

89 90 A

90 91 A

91 92 D

92 93 C

93 94 D

C 25%

94 95 A

B 25%

95 96 B

96 97 C

97 98 D

B 25%

98 99 C

99 100 B

100 88.0 88.0 86.7 90.7 88.0 92.0 86.7 90.0 86.0 88.0 92.0 88.7 88.0 88.0 86.6 90.6 88.0 92.0 86.6 90.0 86.0 88.0 92.0 88.7 Class Avg 88.5 RO Avg 92.0 SRO Section Avg 89.0 SRO Avg 88.0 RO Section Avg Avg 96.0 88.0 92.0 92.0 SRO section 92.0 88.0 88.0 86.7 90.7 88.0 92.0 86.7 88.0 85.3 86.7 92.0 RO section 88.4 2019 Unit 2 ILO NRC Exam Analysis

2019 ANO-2 Initial NRC Exam Analysis Report Administered May 2nd 2019 Page 1 of 7 RO Final Written Examination Analysis The threshold for determination of questions to be analyzed was a percentage of 50% incorrect responses. We also analyzed other missed questions based on candidate feedback following the examination and made changes to the exam database as needed/requested.

1. 31 7/11 total candidates answered incorrectly (64.0%). six chose A, 1 chose D The correct answer is C.

The questions asked the following:

Given the following:

Unit 2 has tripped due to a LOCA.

SIAS has actuated.

RCS pressure is 1450 psia.

2LT-5636-1, RWT Channel A level transmitter fails low and has NOT been bypassed.

RWT level is 10%.

NOW if ONLY 2RS-2 fails to 0 Volts with the above conditions, 2CV-5126-1, 2P89A Recirc will (1).

NOW if ONLY 2RS-4 fails to 0 Volts with the above conditions, 2CV-5126-1, 2P89A Recirc will (2).

A. (1) close (2) close B. (1) close (2) remain open C. (1) remain open (2) close D. (1) remain open (2) remain open The answer for this question comes from STM 2-70 ENGINEERED SAFETY FEATURES ACTURATION SYSTEM, Revision 19:

2019 ANO-2 Initial NRC Exam Analysis Report Administered May 2nd 2019 Page 2 of 7 There are 4 level transmitters for the RWT that feed into the RAS logic in ESFAS. The RAS actuation requires that 2 out of 4 level transmitters to be less than 6%. The loss of power to a level transmitter causes it to read 0%.

Channel 1 is powered by 2RS-1 Channel 2 has an auctioneered power supply from 2RS-1 and 2RS-2 Channel 3 has an auctioneered power supply from 2RS-3 and 2RS-4 Channel 4 is powered by 2RS-4 A RAS initiation will close the Recirc isolations for the HPSI pumps. With 2LT-5636-1, RWT Channel A level transmitter failed low, a failure of 2RS-2 or 2RS-3 will not cause a RAS initiation but a failure of 2RS-4 will cause a RAS initiation. This is true because channel 2 and 3 have a backup auctioneered power supply.

Based on feedback from the applicants during the exam review, they were thinking transmitter failures only and did not remember or consider the auctioneered power supply logic thus selected the incorrect distractors.

After the review, the applicants agreed this was a valid question with the correct answer. ANO Unit 2 recommends that the answer should NOT be changed AND the question should NOT be deleted.

2019 ANO-2 Initial NRC Exam Analysis Report Administered May 2nd 2019 Page 3 of 7

1. 53 8/11 total candidates answered incorrectly (73.0%). All eight chose D The correct answer is C.

The questions asked the following:

What are the MINIMUM requirements to reset a CSAS?

A. Press BOTH LOCKOUT RESET pushbuttons at ESFAS Cabinet 2C39 AND Press BOTH LOCKOUT RESET pushbuttons at ESFAS Cabinet 2C40.

B. Press EITHER LOCKOUT RESET pushbutton at ESFAS Cabinet 2C39 AND Press EITHER LOCKOUT RESET pushbutton at ESFAS Cabinet 2C40.

C. FIRST press the CSAS reset pushbuttons on PPS Cabinet 2C23; THEN press EITHER LOCKOUT RESET pushbutton at ESFAS Cabinet 2C39 AND press EITHER LOCKOUT RESET pushbutton at ESFAS Cabinet 2C40.

D. FIRST press the CSAS reset pushbuttons on PPS Cabinet 2C23; THEN press BOTH LOCKOUT RESET pushbuttons at ESFAS Cabinet 2C39 AND Press BOTH LOCKOUT RESET pushbuttons at ESFAS Cabinet 2C40.

The answer for this question comes from OP-2202.010, EOP Standard Attachment 45, CSAS Reset:

2019 ANO-2 Initial NRC Exam Analysis Report Administered May 2nd 2019 Page 4 of 7 There are two Lockout Reset Pushbuttons on 2C40 and two on 2C39. Depressing only one of the two Lockout Reset Pushbuttons on 2C40 and one of the two on 2C39 wil reset the relays and allow CSAS to be reset.

Based on feedback from the applicants during the exam review, they could not remember the exact wording of the step in the attachment and when practicing this attachment in the simulator had always defaulted to depressing both buttons on each panel as a conservative measure thus selected the incorrect distractors.

After the review, the applicants agreed this was a valid question with the correct answer. ANO Unit 2 recommends that the answer should NOT be changed AND the question should NOT be deleted.

1. 63 6/11 total candidates answered incorrectly (55.0%). All five chose D The correct answer is C.

The questions asked the following:

Given the following:

Unit 2 is in Mode 5.

Preparations are under way for establishing a vacuum on the Main Condenser using OP-2106.010, Condenser Vacuum System.

Which of the following MUST be in service to commence establishing a vacuum on the Main Condenser? (Assume any applicable procedural ALTERNATIVE ACTIONS can be taken if needed.)

A. Condensate Transfer system, ACW, Condensate system, Gland Seal.

B. ACW, Circulating Water system, Condenser Off Gas Rad Monitor, CCW.

C. Condensate Transfer system, ACW, Circulating Water system, Gland Seal.

D. Gland Seal, ACW, Circulating Water system, Main Turbine on the Turning Gear.

2019 ANO-2 Initial NRC Exam Analysis Report Administered May 2nd 2019 Page 5 of 7 The answer for this question comes from OP-2106.010, Condenser Vacuum System, Revision 34, step 7.0:

Based on the above the required systems needed to draw a vacuum with all allowed procedural ALTERNATIVE ACTIONS being taken are the Condensate Transfer system, ACW, Circulating Water system, Gland Seal.

Based on feedback from the applicants during the exam review, the six that missed this question could not remember any allowed procedural ALTERNATIVE ACTIONS that could be taken for the Main Turbine on the Turning Gear prior to drawing a vacuum thus picked the incorrect distractor D.

After the review, they all agreed this was a valid question with the correct answer.

ANO Unit 2 recommends that the answer should NOT be changed AND the question should NOT be deleted.

2019 ANO-2 Initial NRC Exam Analysis Report Administered May 2nd 2019 Page 6 of 7 SRO Final Written Examination Analysis

1. 83 2/4 total candidates incorrect (50%)

One chose A, one chose C. The correct answer is D.

The questions asked the following:

Given the following:

Unit 2 is at 100% power.

HPSI Pump 2P-89A is out of service for planned maintenance.

HPSI Pump 2P-89C running on the GREEN TRAIN to meet the late date surveillance PM requirements.

At time 0100 today, HSPI Pump 2P-89C catches fire and causes Bus 2A4 to LOCK-OUT.

(1) What is the latest time today that the plant MUST be in Mode 3 to comply with Tech Specs?

(2) What is the highest RCS pressure allowed by Tech Specs under these conditions at time 1800 today?

A. (1) 0700 (2) 700 psia B. (1) 0800 (2) 700 psia C. (1) 0700 (2) 1700 psia D. (1) 0800 (2) 1700 psia

2019 ANO-2 Initial NRC Exam Analysis Report Administered May 2nd 2019 Page 7 of 7 The answer for this question comes from Technical Specifications 3.5.2, Action C:

Based on Action C above the plant has at least 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> to be in Hot Standby from 0100 which is 0800 along with reducing PZR pressure to < 1700 within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> which would be 1400 which is before 1800. Thus D is the correct answer.

Based on feedback from the applicants during the exam review, the SROs stated that they misapplied or could not recall the correct time requirements in TS 3.5.2 and may have applied TS 3.0.3 time requirements instead thus missed the question.

After the review, they all agreed this was a valid question with the correct answer.

ANO Unit 2 recommends that the answer should NOT be changed AND the question should NOT be deleted.