Text

Inservice Inspection Summary Report, Common-3rd Interval ASME Section XI Examination Status Report
	ML13008A076
Person / Time
Site:	Byron
Issue date:	01/02/2013
From:	; Exelon Generation Co, Exelon Nuclear
To:	; Office of Nuclear Reactor Regulation
References
	Byron 2013-0005
	Download: ML13008A076 (8)
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(This report is used to verify that the periodic BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables lWx-requirements of Tables lWx-2412-1 will be met by the interval schedule.)

ASME SECTION X11 EXAMINATION STATUS REPORT 2412-1 apply only to the Category.)

of Total

Exams Completed

% Exams Completed Item No.

Comp Selected Min Per 1 Max

- Min Per 2 Max Per 3

% Selected Period 1 Period 2 Period 3 Category B-A Deferred Exams 81.11 3

3 131.21 2

2 B1.30 1

1 131.40 1

1 Totals:

7 7

N/A N/A N/A Category B-B Non -Deferred Exams B2.11 2

2 0

1 0

100.00%

0.00%

50.00%

B2.12 2

2 0

1 0

100.00%

0.00%

50.00%

B2.40 4

1 1

0 0

25.00%

100.00%

Totals:

8 5

1 1

2 2

0 62.50%

20.00%

60.00%

1. (B2.40) Per Examination Category B-B, Note 1, examinations may be limited to one vessel among a group of vessels performing a similar function.

Category B-D Non-Deferred Exams B3.100 8

8 0

100.00%

0.00%

100.00%

83.110 6

6 4

0 0

100.00%

66.67%

B3.120 6

6 4

0 0

100.00%

66.67%

B3.140 8

8 0

4 0

100.00%

0.00%

50.00%

0.00%

Totals:

28 28 5

8 14 6

12 13 0

100.00%

28.57%

71.43%

1.

(B3.120 & B3.140) Per 10 CFR 50.55a(b)(2)(xxi)(A), Table IWB-2500-1 examination requirements, the provisions of Table IWB-2500-1, Examination Category B-D, Item Numbers B3.120 and B3.140 in the 1998 Edition must be applied when using the 1999 Addenda through the latest edition and addenda.

Category B-D Deferred Exams B3.90 8

8 0

100.00%

0.00%

Totals:

8 8

N/A N/A N/A N/A 0

100.00%

0.00%

1.

(B3.90) Per Examination Category B-D, Note 5, for PWR's in the second and successive inspection intervals, these examinations may be deferred to the end of the interval provided no repair/replacement activities have been performed on the examination item and no flaws or relevant conditions requiring successive inspections in accordance with IWB-2420(b) are contained in the examination item.

Section 3.0 Page 1 of 7 100.00%

0.00%

100.00%

0.00%

100.00%

0.00%

100.00%

0.00%

100.00%

0.00%

1.

(This report is used to verify that the periodic BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables lWx-requirements of Tables lWx-2412-1 will be met by the interval schedule.)

ASME SECTION XI EXAMINATION STATUS REPORT 2412-1 apply only to the Category.)

of Total

Exams Completed

% Exams Completed Item No.

Comp Selected Min Per 1 Max Min Per 2 Max Per 3

% Selected Period 1 Period 2 Period 3 33.33%

66.67%

33.33%

66.67%

0.00%

33.33%

66.67%

0.00%

50.00%

100.00%

0.00%

50.00%

0.00%

100.00%

0.00%

100.00%

32.50%

62.50 62.50%

representing one third of the 54 Reactor Vessel Closure Head Nuts, Closure Studs, and Closure Washers, (B6.40) A single component representing all of the 54 Reactor Vessel Threads in Flange to be examined.

(B6.90 & 86.100 & 66.110) Eight components are tracked in the database, each representing all of the Bolts and associated Nuts, Bushings, and Washers and Flange Surfaces on one of the eight Steam Generator Manways. Each of the eight entries represents 20 bolts and associated parts for an individual manway.

(B6.180) Four components are tracked in the database, each representing one of the 24 Bolts on one of the four Reactor Coolant Pumps (96 total) as reported in the ISI Program Plan. The volumetric examination of these components is limited to only one of the pumps per Examination Category B-G-1, Note 3 and Examination Category B-L-2, Note 1. Examination is required only once per inspection interval.

(66.190 & 66.200) Four components are tracked in the database, each representing all 24 associated Flange Surfaces and Nuts, Bushings, and Washers for one of the four Reactor Coolant Pumps (96 total) as reported in the ISI Program Plan. The visual examination of these components is limited to only one of the pumps per Examination Category B-G-1, Note 3 and Examination Category B-L-2, Note 1. Also, per Examination Category B-G-1, Note 4 and Examination Category B-L-2, Note 2, examination is required only when a pump is disassembled for maintenance, repair, or volumetric examination or bolting is removed. Examination is required only once per inspection interval.

(B6.210) Eight components are tracked in the database, each representing all of the Bolts and associated Nuts, Bushings, and Washers and Flange Surfaces on one of the eight Reactor Coolant Valves as reported in the ISI Program Plan. The volumetric examination of these components is limited to only one of the valves per Examination Category B-G-1, Note 3 and Examination Category B-M-2, Note 3. Examination is required only once per inspection interval.

Section 3.0 Page 2 of 7 Category B-G-1 Deferred Exams 66.10 66.20 B6.40 B6.50 B6.90 B6.100 B6.110 B6.180 B6.190 B6.200 86.210 B6.220 B6.230 Totals:

67 3

3 1

3 8

8 8

1 1

0 2

1 1

40 0

0 0

1 1

N/A 13 0

4 0

0 N/A N/A 1

0 0

1 2 100.00%

100.00%

25.00%

0.00%

25.00%

12.50%

59.70%

N/A 2.

3.

4.

5.

(B6.10 & B6.20 & 66.50) Single components Bushings.

(This report is used to verify that the periodic BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables IWx requirements of Tables IM-2412-1 will be met by the interval schedule.)

ASME SECTION XI EXAMINATION STATUS REPORT 2412-1 apply only to the Category.)

of Total

Exams Completed

% Exams Completed Item No.

Comp Selected Min Per 1 Max Min Per 2 Max Per 3

% Selected Period 1 Period 2 Period 3 7.

(B6.220 & B6.230) Eight components are tracked in the database, each representing all of the Bolts and associated Nuts, Bushings, and Washers and Flange Surfaces on one of the eight Reactor Coolant Valves as reported in the ISI Program Plan. The visual examination of these components is limited to only one of the valves per Examination Category B-G-1, Note 3 and Examination Category B-M-2, Note 3. Also, per Examination Category B-G-1, Note 4 and Examination Category B-M-2, Note 2, examination is required only when a valve is disassembled for maintenance, repair, or volumetric examination or bolting is removed. Examination is required only once per inspection interval.

Category B-G-2 Accessible Exams B7.10 1

0 0

0.00%

B7.20 1

0 0

0.00%

B7.50 20 3

2 0

0 15.00%

66.67%

87.60 4

0 0

0.00%

B7.70 26 2

2 0

0 7.69%

100.00%

Totals:

52 5

N/A 4

N/A N/A 0

N/A 0

9.62%

80.00%

80.00 80.00%

1.

(All) Per Examination Category B-G-2, Note 1, examination is required only when a bolted connection is disassembled or bolting is removed. The Total Selected is based on the disassembled components accessible for examination.

2.

(B7.10) One component representing the five CETC and RVLIS Clamp Bolts as reported in the ISI Program Plan.

3.

(B7.20) A single component is scheduled in the first inspection period, representing all 16 Pressurizer Manway Bolts and associated Nuts as reported in the ISI Program Plan.

4.

(B7.50) Per Examination Category B-G-2, Note 3, examinations are limited to at least one bolted connection within each group of bolted connections that are similar in design, size, function, and service. Examination is required only once per inspection interval within each bolted connection group.

5.

(B7.60) Four components are tracked in the database, each representing all 36 Bolts and associated Nuts for one of the four Reactor Coolant Pumps (144 total) as reported in the ISI Program Plan. Per Examination B-L-2, Note 2, examination is required only when a pump is disassembled for maintenance, repair, or volumetric examination or bolting is removed. Also, per Examination Category B-G-2, Note 2 and Examination Category B-L-2, Note 1, examinations are limited to at least one pump within each group of pump that are of the same size, design, manufacturing method, and function. Examination is required only once per inspection interval within each valve group.

6.

(B7.70) Per Examination Category B-G-2, Note 2 and Examination Category B-M-2, Note 2, examination is required only when a valve is disassembled for maintenance, repair, or volumetric examination or bolting is removed. Also, per Examination Category B-G-2, Note 2 and Examination Category B-M-2, Note 3, examinations are limited to at least one valve within each group of valves that are of the same size, design, manufacturing method, and function.

Examination is required only once per inspection interval within each valve group.

Section 3.0 Page 3 of 7

(This report is used to verify that the periodic BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables lWx-requirements of Tables IWx-2412-1 will be met by the interval schedule.

ASME SECTION XI EXAMINATION STATUS REPORT 2412-1 apply only to the Category.)

of Total

Exams Completed

% Exams Completed Item No.

Comp Selected Min Per 1 Max Min Per 2 Max Per 3

% Selected Period 1 Period 2 Period 3 Category B-K Non-Deferred Exams B10.10 2

1 B10.20 7

3 Totals:

9 4

1 1

2 2

1 2

0 1

0 0

1 50.00%

42.86%

44.44%

0.00%

100.00%

33.33%

25.00%

50.00%

100.00%

33.33%

50.00%

1.

(B10.10) Per Examination Category B-K, Note 4, for multiple vessels of similar design, function, and service, only one welded attachment of only one of the multiple vessels shall be selected for examination. Conservatively, a welded attachment of each type of welded attachment of one of multiple vessels will be examined.

2.

(B10.20) Per Examination Category B-K, Note 5, for piping, pumps, and valves, a sample of 10% of the welded attachments associated with the component supports selected for examination under IWF-2510 shall be examined. This requirement is conservatively interpreted to mean that 10% of the total Class 1 welded attachments shall be examined.

Category B-L-2 Deferred Exams B12.20 4

1 0

25.00%

0.00%

100.00%

Totals:

4 1

N/A 0

N/A N/A 1

N/A 0

25.00%

0.00%

100.00%

1. (B12.20) The examination of pump casings is limited to only one of the pumps performing similar functions in the system per Examination Category B-L-2, Note 1. Also, per Examination Category B-L-2, Note 2, examination is required only when a pump is disassembled for maintenance, repair, or volumetric examination. Examination is required only once per inspection interval.

Category B-M-2 Deferred Exams B12.50 37 4

4 0

0 10.81%

100.00%

Totals:

37 4

N/A 4

N/A N/A 0

N/A 0

10.81%

100.00%

1. (B12.50) Per Examination Category B-M-2, Note 2, examination is required only when a valve is disassembled for maintenance, repair, or volumetric examination. Also, per Examination Category B-M-2, Note 3, examinations are limited to at least one valve within each group of valves that are of the same size, design, manufacturing method, and function. Examination is required only once per inspection interval within each valve group.

Category B-N-1 Non-Deferred Exams 813.10 1

1 1

1 0

100.00%

200.00%

Totals:

1 1

0 1

1 1

0 100.00%

100.00%

200.00%

1. (B13.10) "% Completed" exceeds 100% since the vessel interior is selected for examination once each period (three times during the interval).

Category B-N-2 Deferred Exams B13.60 1

1 0

100.00%

0.00%

100.00%

Totals:

1 1

N/A 0

N/A N/A 1

N/A 0

100.00%

0.00%

100.00%

1. Per IWB-2412(a), If there is only one item to be examined in an Examination Category, the item maybe examined in one period.

Section 3.0 Page 4 of 7

(This report is used to verify that the periodic BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables lWx-requirements of Tables lWx-2412-1 will be met by the interval schedule.)

ASME SECTION XI EXAMINATION STATUS REPORT to the Category.)

2412 1 apply only

of Total

Exams Completed

% Exams Completed Item No.

Comp Selected Min Per 1 _ Max Min Per 2 Max Per 3

% Selected Period 1 Period 2 Period 3 Category B-N-3 Deferred Exams B13.70 1

1 0

100.00%

0.00%

100.00%

Totals:

1 1

N/A 0

N/A N/A 1

N/A 0

100.00%

0.00%

100.00%

1. Per IWB-2412(a), If there is only one item to be examined in an Examination Category, the item may be examined in one period.

Category B-O Deferred Exams B14.10 5

5 0

0 0

100.00%

0.00%

Totals:

5 5

N/A 0

N/A N/A 0

N/A 0

100.00%

0.00%

1. (B14.10) 10% of the 45 CRD Housings (as reported in the IS[ Program Plan) are required to be examined each interval per this Item Number. These five components represent that 10% population.

Category B-P Non-Deferred Exams B15.10 1

1 3

2 0

100.00%

300.00%

500.00%

Totals:

1 1

N/A 3

N/A N/A 2

N/A 0

100.00%

3000.00%

500.00%

1. (B15.10) "% Completed" exceeds 100% since Class 1 pressure tests are performed each refueling outage. One component representing the five systems in Class 1 as reported in the ISI Program Plan.

Category C-A Non-Deferred Exams C1.10 6

1 0

0 0

16.67%

0.00%

C1.20 6

1 0

16.67%

0.00%

100.00%

C1.30 4

1 1

0 0

25.00%

100.00%

Totals:

16 3

1 1

0 18.75%

33.33%

66.67%

1.

(C1.10, C1.20, & C1.30) Per Examination Category C-A, Note 3, in the case of multiple vessels of similar design, size, and service, the required examinations may be limited to one vessel or distributed among the vessels.

2.

(C1.10 & C1.20) Two welds per item for the Residual Hear Removal Heat Exchanger are exempted from examination with the adoption of ASME Code Case N-706. The remaining welds in the items are for the four steam generators and are selected for examination under #1 above.

Category C-B Non-Deferred Exams C2.21 12 1

0 0

0 8.33%

0.00%

C2.22 4

1 1

0 0

25.00%

100.00%

Totals:

16 2

0 1

1 1

0 1

0 12.50%

50.00%

1.

(C2.21 & C2.22) Per Examination Category C-B, Note 4, in the case of multiple vessels of similar design, size, and service, the required examinations may be limited to one vessel or distributed among the vessels.

2.

(C2.21) The capped Auxiliary Feedwater nozzle is exempted from examination selection per Examination Category C-B, Note 1 and Note 2.

Section 3.0 Page 5 of 7

(This report is used to verify that the periodic BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables IWx-requirements of Tables IWx 2412 1 will be met by the interval schedule.)

ASME SECTION XI EXAMINATION STATUS REPORT 2412-1 apply only to the Category.)

of Total

Exams Completed

% Exams Completed Item No.

Comp Selected Min Per 1 Max

_ Min Per 2 Max

_ Per 3

% Selected Period 1 Period 2 Period 3 3.

(C2.21) Two welds per item for the Residual Hear Removal Heat Exchanger are exempted from examination with the adoption of ASME Code Case N-706.

The remaining welds in the item are for the four steam generators and are selected for examination under #1 above.

Category C-C Non-Deferred Exams C3.10 2

1 1

0 0

50.00%

100.00%

C3.20 60 7

2 3

0 11.67%

28.57%

71.43%

C3.30 20 2

0 1

0 10.00%

0.00%

50.00%

Totals:

82 10 2

3 5

2 4

4 0

12.20%

30.00%

70.00%

1.

(C3.10) Per Examination Category C-C, Note 4, for multiple vessels of similar design, function, and service, only one welded attachment of only one of the multiple vessels shall be selected for examination. Conservatively, a welded attachment of each type of welded attachment of one of multiple vessels will be examined.

2.

(C3.20 & C3.30) Per Examination Category C-C, Note 5, for piping, pumps, and valves, a sample of 10% of the welded attachments associated with the component supports selected for examination under IWF-2510 shall be examined. This requirement is conservatively interpreted to mean that 10% of the total Class 2 welded attachments shall be examined. The interpretation is consistent with the previous NRC condition on the use of Code Case N-509.

Category C-H Non-Deferred Exams C7.10 70 50 50 50 0

71.43%

100.00%

200.00%

Totals:

70 50 N/A 50 N/A N/A 50 N/A 0

71.43%

100.00%

200.00%

1.

(C7.10) "% Completed" exceeds 100% since Class 2 pressure tests are performed each inspection period.

2.

(C7.10) Seventy subsystems within the twenty-four systems in Class 2 as reported in the ISI Program Plan.

Category F-A Non-Deferred Exams F1.10 467 122 39 44 0

26.12%

31.97%

68.03%

F1.20 602 101 36 32 0

16.78%

35.64%

67.33%

F1.30 1007 103 39 37 0

10.23%

37.86%

73.79%

F1.40 84 39 11 20 0

46.43%

28.21%

79.49%

Totals:

2160 365 59 125 182 58 133 148 0

16.90%

34.25%

70.68%

1.

(F1.30 & F1.40) Unit 0 (Common) components are scheduled with and included in the Unit 1 counts.

2.

(F1.40) Per Examination Category F-A, Note 3, for multiple components other than piping within a system of similar design, function, and service, the supports of only one of the multiple components are required to be examined.

Section 3.0 Page 6 of 7

(This report is used to verify that the periodic BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables lWx-requirements of Tables IWx-2412-1 will be met by the interval schedule.)

ASME SECTION XI EXAMINATION STATUS REPORT 2412-1 apply only to the Category.)

of Total

Exams Completed

% Exams Completed Item No.

Comp Selected Min Per 1 Max

- Min Per 2 Max

_ Per 3

% Selected Period 1 Period 2 Period 3 Category R-A Non-Socket Welds 1

128 32 15 4

2 130 30 15 14 4

1420 161 89 31 5

65 10 0

0 Totals:

1743 233 N/A 93 N/A N/A 49 N/A 0

Category R-A Socket Welds 2

93 38 114 76 0

300.00%

500.00%

4 188 44 132 88 0

300.00%

500.00%

5 345 34 102 68 0

300.00%

500.00%

Totals:

626 116 N/A 348 N/A N/A 232 N/A 0

300.00%

500.00%

1. Socket welds for Examination Category R-A are listed separately from butt welds are selected for examination in each of the seven refueling outages. The "%

Completed" exceeds 100% since they are examined each outage per ASME Code Case N-578-1, Table 1, footnote 12.

Category R-A Combined Examination of Welds 1

128 32 15 4

0 25.00%

46.88%

59.38%

2 233 68 129 90 0

30.49%

43.58%

73.99%

3 0

0 4

1608 205 221 119 0

12.75%

47.12%

72.49%

5 410 44 102 68 0

10.73%

41.13%

68.55%

Totals:

2369 349 348 467 522 232 281 316 0

14.73%

44.69%

71.58%

1. The Combined Examination Table shows the population and percentage selected for the five Risk Categories under Risk-Informed ISI. Per N-578-1 Paragraph -2410, the examinations of Examination Category R-A shall be completed during each inspection period in accordance with Table IWB-2412-1.

With 116 socket welds examined each outage (812 total examinations) and 233 non-socket weld examinations, the combined examination completion percentages are shown for each period.

Section 3.0 Page 7 of 7 46.88%

59.38%

33.33%

80.00%

42.24%

61.49%

0.00%

39.91 %

60.94 60.94%

ML13008A076

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