Text

Post-Exam Comments
	ML26012A116
Person / Time
Site:	Diablo Canyon
Issue date:	11/19/2025
From:	Birkel M; Pacific Gas & Electric Co
To:	David You; NRC Region 4
References
	DCL-25-091
	Download: ML26012A116 (0)
	v • d • e

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2025 DCPP NRC Exam Administered November 7, 2025 RO Final Written Examination Analysis The threshold for determination of questions to be analyzed was a percentage of greater than 50% incorrect responses. We also analyzed other questions based on applicant feedback following the examination. Based on the results of this exam analysis, training needs will be tracked under notification 51236996 task 26.

19 19/23 total applicants incorrect (83%)

Four chose B. 15 chose C. The correct answer is D.

This question asks how to borate the RCS in accordance with OP AP-12D to lower reactor power. The correct answer D to initiate a continuous boration flow of 20 gpm while reducing turbine load at 20 MW/min; adjusting boration rate or turbine ramp rate is allowed.

Distractor B states to open 8805A and B then reduce load to control the shutdown. Distractor C states to initiate a continuous boration flow of 30 gpm; adjusting turbine ramp rate is allowed but boration may not be lowered below 30 gpm. The question is technically correct as written, with no construction problems.

31 15/23 total applicants incorrect (65%)

Fifteen chose D. The correct answer is C.

This question asks how the RCDT must be operated when draining the PRT when removing it from service. The correct answer C states the RCDT must be vented to atmosphere to prevent a manometer effect from pushing unfiltered water into the RCP seals. Distractor D states closely monitored and PRT drain closed when RCDT level exceeds 50% to prevent overflowing into the level instrumentation reference leg. No change to the key was made. The question is technically correct as written, with no construction problems.

2025 DCPP NRC Exam Administered November 7, 2025 SRO Final Written Examination Analysis The threshold for determination of questions to be analyzed was a percentage of greater than 50% incorrect responses. We also analyzed other questions based on applicant feedback following the examination. Based on the results of this exam analysis, training needs will be tracked under notification 51236996 task 26.

No high miss SRO questions

93.3%

92.0%

86.6%

92.0%

88.0%

86.6%

89.3%

92.0%

90.6%

84.0%

76.0%

88.5%

94.6%

86.6%

93.3%

89.3%

92.0%

89.3%

92.0%

90.6%

93.3%

92.0%

91.6%

90.0%

100.0%

83.3%

100.0%

83.3%

100.0%

83.3%

100.0%

66.6%

91.7%

100.0%

83.3%

100.0%

83.3%

100.0%

95.4%

93.5%

92.0%

96.0%

88.0%

96.0%

100.0%

96.0%

100.0%

88.0%

94.9%

93.3%

92.0%

86.6%

92.0%

88.0%

86.6%

89.3%

92.0%

90.6%

84.0%

76.0%

88.5%

94.0%

95.0%

87.0%

94.0%

91.0%

94.0%

91.0%

93.0%

92.0%

95.0%

91.0%

92.5%

90.4%

8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 8:10 12:00 10:48 13:35 10:30 10:57 13:04 12:10 12:22 11:56 12:21 11:16 13:17 13:23 11:27 13:43 12:39 11:38 12:30 12:29 13:11 12:56 12:02 11:28 3:50 2:38 5:25 2:20 2:47 4:54 4:00 4:12 3:46 4:11 3:06 5:07 5:13 3:17 5:33 4:29 3:28 4:20 4:19 5:01 4:46 3:52 3:18 1

B B

0%

2 D

D D

D B

D D

B D

D D

B 17%

3 C

C C

C 0%

4 B

B B

B 0%

5 C

C D

A A

C A

C C

C A

C C

C 22%

6 D

D D

A D

D D

A D

D D

B D

D D

D 13%

7 C

C A

C C

C 4%

8 D

D D

C D

D D

D 4%

9 B

B B

C B

B B

B D

B B

B 9%

10 C

A C

C C

C D

C C

C 9%

11 D

D D

D 0%

12 A

A A

A 0%

13 B

B B

B A

D A

B 13%

14 A

A A

A C

A A

A 4%

15 D

D D

D 0%

16 C

C C

C D

C C

D C

C B

C C

B C

C 17%

17 B

B B

B 0%

18 B

B B

B 0%

19 D

C C

B C

C B

C D

C C

D D

B C

C C

C D

B 83%

20 D

D D

C D

D D

D C

D D

D A

D D

D C

D D

D C

D D

D 22%

21 D

D D

D 0%

22 C

C C

D C

C C

C 4%

23 B

B B

D B

B B

B D

B B

C B

B B

B 13%

24 C

C C

C D

C C

D C

C C

D C

C C

C 13%

25 B

B B

D B

B B

A B

B B

B 9%

26 A

A A

A C

A A

A 4%

27 D

D D

D 0%

28 D

D D

D 0%

29 C

C C

C 0%

30 B

B B

B A

B B

B 4%

31 C

D D

C C

D D

C D

D C

D D

C C

C 65%

32 C

C C

C 0%

33 A

A A

A 0%

34 A

A A

A C

C A

A A

A C

A A

A C

A A

A 22%

35 A

A A

C B

A B

A A

A 17%

36 B

B B

B D

B B

B 4%

37 B

B B

B 0%

38 A

D A

A D

D D

D B

A A

A B

A A

D D

A 43%

39 A

A A

A D

A A

A D

A A

A 9%

40 D

D D

D A

D D

D A

D D

D 13%

41 C

C C

C D

C C

C 4%

42 B

B B

B 0%

43 C

C C

D C

A B

C C

C 13%

44 D

D D

D 0%

45 C

C C

C D

C C

A C

C 9%

46 B

B B

A B

B B

D B

B B

B 9%

47 A

A A

A 0%

48 A

A A

A D

D A

A A

D A

A 13%

49 B

B B

C B

B B

B D

B B

B 9%

50 D

D D

D 0%

51 D

D D

B D

D D

D 9%

52 C

C C

C B

C C

C 4%

53 A

A C

B A

A A

B A

A A

B 17%

54 D

D D

D C

D D

B D

D D

D C

D D

C 17%

55 D

D D

D 0%

56 D

D D

C D

D D

B D

D D

D 9%

57 C

C C

D C

C C

C A

C D

A C

C C

A D

C C

C 26%

58 C

C C

B C

C C

C 4%

59 C

C C

C D

D C

C C

C D

C 13%

60 A

A A

C A

A A

C A

B A

A A

C A

C 22%

61 B

B B

D B

B B

D B

B B

D B

B B

B 13%

62 C

C C

C 0%

63 A

A A

D A

B A

A A

D A

A A

D A

A A

A 17%

64 B

D D

B D

D B

B D

B B

D A

B B

D B

B B

B 35%

65 B

B B

C B

B B

B 4%

66 A

A A

A C

A A

A C

C 13%

67 C

C C

D C

C C

D C

C C

C 9%

68 B

B B

B 0%

69 A

A A

A 0%

70 D

D D

D A

D D

D A

D D

D A

D D

D C

D 22%

71 B

B B

B 0%

72 A

A A

B A

A A

A B

A A

A 9%

73 A

A A

D A

A A

A 4%

74 D

D D

D 0%

75 A

A A

C A

A A

A 4%

76 A

A A

A 0%

77 C

C C

C 0%

78 C

C C

C 0%

79 D

D D

A D

D D

D 9%

80 B

B B

B 0%

81 D

D D

D 0%

82 D

D D

D 0%

83 A

A A

A 0%

84 A

C A

A A

B 18%

85 D

D D

D 0%

86 B

B B

B 0%

87 B

B B

B 0%

88 A

A A

B 9%

89 C

C C

C A

C C

C 9%

90 A

A A

A 0%

91 C

C C

C 0%

92 B

B B

A B

B 9%

93 B

B B

B 0%

94 D

D D

D 0%

95 D

D D

D 0%

96 A

B B

B A

A A

A 45%

97 C

C C

C 0%

98 C

C C

C 0%

99 B

B B

B 0%

100 D

D D

C D

D D

D B

D D

C 27%

DCPP L241 - 2025 - Written Exam Analysis I5 I6 I7 I8 R10 I3 R11 R12 I4 R5 R6 R7 R8 R9 SRO Average Overall Start Time End Time Total Time RO Average GFES Average R1 R2 R3 Question Key R4 I10 U1 I1 I2 Overall Summary RO Summary 3:51 SRO Summary 4:19 4:04 I9

DCL-25-091, Post-Exam Comments

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