ML13008A076

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Inservice Inspection Summary Report, Common-3rd Interval ASME Section XI Examination Status Report
ML13008A076
Person / Time
Site: Byron Constellation icon.png
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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Text

(This report is used to verify that the periodic requirements of Tables lWx-2412-1 will be met by BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables lWx-the interval schedule.) ASME SECTION X11 EXAMINATION STATUS REPORT 2412-1 apply only to the Category.)

  1. 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 - 100.00% 0.00% 0.00% 0.00%

131.21 2 2 - 100.00% 0.00% 0.00% 0.00%

B1.30 1 1 - 100.00% 0.00% 0.00% 0.00%

131.40 1 1 - 100.00% 0.00% 0.00% 0.00%

0 Totals: 7 . 7 0 N/A - 0N/A N/A  % 100.00% 0.00% 0.00%

Category B-B Non -Deferred Exams B2.11 2 2 0 1 0 100.00% 0.00% 50.00% 50.00%

B2.12 2 2 0 1 0 100.00% 0.00% 50.00% 50.00%

B2.40 4 1 1 0 0 25.00% 100.00% 100.00% 100.00%

Totals: 8 5 1 1 2 2 2 2 0 62.50% 20.00% 60.00% 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 8 0 100.00% 0.00% 100.00% 100.00%

83.110 6 6 4 0 0 100.00% 66.67% 66.67% 66.67%

B3.120 6 6 4 0 0 100.00% 66.67% 66.67% 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% 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% 0.00% 0.00%

Totals: 8 8 N/A - N/A N/A - N/A 0 100.00% 0.00% 0.00% 0.00%

1. (B3.90) Per Examination Category B-D, Note 5, for PWR's in the second and successive inspectio n intervals, these examinations may be deferred to the end of the interval provided no repair/replacement activities have been performed on the examinat ion 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

(This report is used to verify that the periodic requirements of Tables lWx-2412-1 will be met by BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables lWx-the interval schedule.) ASME SECTION XI EXAMINATION STATUS REPORT 2412-1 apply only to the Category.)

  1. of Total # Exams Completed Item No. Comp Selected Min  % Exams Completed Per 1 Max Min Per 2 Max Per 3  % Selected Period 1 Period 2 Period 3 Category B-G-1 Deferred Exams 66.10 3 66.20 100.00% 33.33% 66.67% 66.67%

3 B6.40 100.00% 33.33% 66.67% 66.67%

1 B6.50 100.00% 0.00% 0.00% 0.00%

3 B6.90 100.00 % 33.33% 66.67% 66.67%

8 B6.100 100.00% 0.00% 50.00% 50.00%

8 0 B6.110 100.00% 100.00  % 100.00  % 100.00%

8 4 B6.180 1 100.00% 0.00% 50.00% 50.00%

0 0 B6.190 1 25.00% 0.00% 0.00% 0.00%

0 1 25.00%

B6.200 0 0.00% 100.00  % 100.00%

0 0 0.00%

86.210 2 0 0.00% 0.00% 0.00%

0 25.00% 0.00% 0.00%

B6.220 1 1 0.00%

0 12.50% 100.00  % 100.00 %

B6.230 1 1 100.00%

0 12.50% 100.00% 100.00%

Totals: 67 2 40 N/A . 100.00%

13 5 N/A N/A 120 N/A  %

1. (B6.10 & B6.20 & 66.50) Single components 59.70% 32.50%  %

representing one third of the 54 Reactor Vessel Closure Head Nuts, Bushings. Closure Studs, and Closure Washers,

2. (B6.40) A single component representing all of the 54 Reactor Vessel Threads in Flange to be examined.
3. (B6.90 & 86.100 & 66.110) Eight components are tracked in the database, each representing all of the Bolts and Flange Surfaces on one of the eight Steam Generator and associated Nuts, Bushings, and Washers Manways. Each of the eight entries represents 20 bolts and manway. associated parts for an individual
4. (B6.180) Four components are tracked in the databa se, each representing one of the 24 Bolts on one of the four reported in the ISI Program Plan. The volumetric examination Reactor Coolant Pumps (96 total) as of these components is limited to only one of the pumps per 3 and Examination Category B-L-2, Note 1. Examination is Examination Category B-G-1, Note required only once per inspection interval.
5. (66.190 & 66.200) Four components are tracked in the database, each representing all 24 associated Flange one of the four Reactor Coolant Pumps (96 total) as report Surfaces and Nuts, Bushings, and Washers for ed in the ISI Program Plan. The visual examination of these the pumps per Examination Category B-G-1, Note 3 and Exam components is limited to only one of ination Category B-L-2, Note 1. Also, per Examination Categ Examination Category B-L-2, Note 2, examination is requir ory B-G-1, Note 4 and ed only when a pump is disassembled for maintenance, repair is removed. Examination is required only once per inspection , or volumetric examination or bolting interval.

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

Section 3.0 Page 2 of 7

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

  1. of Total # Exams Completed Item No. Comp  % Exams Completed 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 Washer Surfaces on one of the eight Reactor Coolant Valves as reported in the ISI s and Flange Program Plan. The visual examination of these components is limited to of the valves per Examination Category B-G-1, Note 3 and Examination only one Category B-M-2, Note 3. Also, per Examination Category B-G-1, Note 4 Examination Category B-M-2, Note 2, examination is required only when and a valve is disassembled for maintenance, repair, or volumetric examination is removed. Examination is required only once per inspection interval. or bolting Category B-G-2 Accessible Exams B7.10 1 0 0 0 0 0.00% 0.00% 0.00% 0.00%

B7.20 1 0 0 0 0 0.00% 0.00% 0.00% 0.00%

B7.50 20 3 2 0 0 15.00% 66.67% 66.67% 66.67%

87.60 4 0 0 0 0 0.00% 0.00% 0.00% 0.00%

B7.70 26 2 2 0 0 7.69% 100.00% 100.00% 100.00%

8 Totals: 0 52 5 .

N/A 40 N/A N/A0 0 N/A  % 0 9.62% 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 Selected is based on the disassembled components accessible for examin Total ation.

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, represe nting all 16 Pressurizer Manway Bolts and associated Nuts as reported in Program Plan. the ISI
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 connect similar in design, size, function, and service. Examination is required only ions that are 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 total) as reported in the ISI Program Plan. Per Examination B-L-2, Note (144 2, examination is required only when a pump is disassembled for mainten repair, or volumetric examination or bolting is removed. Also, per Examin ance, ation 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. Examin is required only once per inspection interval within each valve group. ation
6. (B7.70) Per Examination Category B-G-2, Note 2 and Examination Categor y B-M-2, Note 2, examination is required only when a valve is disassembled maintenance, repair, or volumetric examination or bolting is removed. Also, for per Examination Category B-G-2, Note 2 and Examination Category B-M-2, 3, examinations are limited to at least one valve within each group of valves Note 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 requirements of Tables IWx-2412-1 will be met by BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables lWx-the interval schedule. ASME SECTION XI EXAMINATION STATUS REPORT 2412-1 apply only to the Category.)

  1. 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 0 1 0 50.00% 0.00% 100.00% 100.00%

B10.20 7 3 1 0 0 42.86% 33.33% 33.33% 33.33%

Totals: 9 4 1 1 2 2 1 2 0 44.44% 25.00% 50.00% 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 1 0 25.00% 0.00% 100.00% 100.00%

Totals: 4 1 N/A 0 N/A N/A 1 N/A 0 25.00% 0.00% 100.00% 100.00%

1. (B12.20) The examination of pump casings is limited to only one of the pumps performin g 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% 100.00% 100.00%

Totals: 37 4 N/A 4 N/A N/A 0 N/A 0 10.81% 100.00% 100.00% 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% 100.00% 200.00% 200.00%

Totals: 1 1 0 1 1 1 1 1 0 100.00% 100.00% 200.00% 200.00%

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

Category B-N-2 Deferred Exams B13.60 1 1 0 1 0 100.00% 0.00% 100.00% 100.00%

Totals: 1 1 N/A 0 N/A N/A 1 N/A 0 100.00% 0.00% 100.00% 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 requirements of Tables lWx-2412-1 will be met by BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables lWx-the interval schedule.) ASME SECTION XI EXAMINATION STATUS REPORT 2412 1 apply only to the Category.)

  1. 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 1 0 100.00% 0.00% 100.00% 100.00%

Totals: 1 1 N/A 0 N/A N/A 1 N/A 0 100.00% 0.00% 100.00% 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% 0.00% 0.00%

0 Totals: .0 5 5 N/A 0 0 N/A N/A% 0 N/A 0 100.00% 0.00% 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% 500.00%

Totals: 1 1 N/A 3 N/A N/A 2 N/A 0 100.00% 3000.00% 500.00% 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% 0.00% 0.00%

C1.20 6 1 0 1 0 16.67% 0.00% 100.00% 100.00%

C1.30 4 1 1 0 0 25.00% 100.00% 100.00% 100.00%

Totals: 16 3 1 1 1 1 1 1 0 18.75% 33.33% 66.67% 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. 1 above.

Category C-B Non-Deferred Exams C2.21 12 1 0 0 0 8.33% 0.00% 0.00% 0.00%

C2.22 4 1 1 0 0 25.00% 100.00% 100.00% 100.00%

Totals: 16 2 0 1 1 1 0 1 0 12.50% 50.00% 50.00% 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 requirements of Tables IWx 2412 1 will be met by BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables IWx-the interval schedule.) ASME SECTION XI EXAMINATION STATUS REPORT 2412-1 apply only to the Category.)

  1. 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% 100.00% 100.00%

C3.20 60 7 2 3 0 11.67% 28.57% 71.43% 71.43%

C3.30 20 2 0 1 0 10.00% 0.00% 50.00% 50.00%

Totals: 82 10 2 3 5 2 4 4 0 12.20% 30.00% 70.00% 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% 200.00%

Totals: 70 50 N/A 50 N/A N/A 50 N/A 0 71.43% 100.00% 200.00% 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% 68.03%

F1.20 602 101 36 32 0 16.78% 35.64% 67.33% 67.33%

F1.30 1007 103 39 37 0 10.23% 37.86% 73.79% 73.79%

F1.40 84 39 11 20 0 46.43% 28.21% 79.49% 79.49%

Totals: 4 2160 365 .2 59 125 182 58 5 133 148  %

0 16.90% 70.68% 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 requirements of Tables IWx-2412-1 will be met by BYRON STATION UNIT 1 AND UNIT COMMON - 3RD INTERVAL (The percentage requirements of Tables lWx-the interval schedule.) ASME SECTION XI EXAMINATION STATUS REPORT 2412-1 apply only to the Category.)

  1. 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 46.88% 59.38% 59.38%

2 130 30 15 14 33.33% 80.00% 80.00%

4 1420 161 89 31 42.24% 61.49% 61.49%

5 65 10 0 0 0.00% 0.00% 0.00%

6 Totals: 1743 0 233 N/A.9 93 N/A N/A 494 N/A 0  % 39.91 %  %

Category R-A Socket Welds 2 93 38 114 76 0 -% 300.00% 500.00% 500.00%

4 188 44 132 88 0 -% 300.00% 500.00% 500.00%

5 345 34 102 68 0  % 300.00% 500.00% 500.00%

Totals: 626 116 N/A 348 N/A N/A 232 N/A 0  % 300.00% 500.00% 500.00%

. 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% 59.38%

2 233 68 129 90 0 30.49% 43.58% 73.99% 73.99%

3 0 0 - - - -% -% -% -%

4 1608 205 221 119 0 12.75% 47.12% 72.49% 72.49%

5 410 44 102 68 0 10.73% 41.13% 68.55% 68.55%

Totals: 2369 349 348 467 522 232 281 316 0 14.73% 44. 69% 71.58% 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

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