ML12341A165

From kanterella
Jump to navigation Jump to search
Q0108.20-R-001, Rev. 1, Appendix C, Seismic Walkdown Checklist (Swc). Part 3 of 3
ML12341A165
Person / Time
Site: Byron Constellation icon.png
Issue date: 11/07/2012
From:
Stevenson & Associates
To:
Office of Nuclear Reactor Regulation, Exelon Generation Co
References
RS-12-161 12Q0108.20-R-001, Rev 1
Download: ML12341A165 (248)
v • d • e


Text

Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-1 2-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1PI-0633 Equipment Class: (18) Instruments on Racks Equipment

==

Description:==

SPENT FUEL PIT PUMP SUCTION PRESSURE INDICATO Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

FH, 401.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which.an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Instrument is securely attached to rack that is anchored to seismic block wall that would not collapse.Yes C-333 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1PI-0633 Equipment Class: (18) Instruments on Racks Equipment

==

Description:==

SPENT FUEL PIT PUMP SUCTION PRESSURE INDICATO Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Masonry walls are seismic and would not collapse on equipment 9. Do attached lines have adequate flexibility to avoid damage?Yes Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/9/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-334 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: Equipment Class: Equipment

==

Description:==

Photos None.1 PI-0633 (18) Instruments on Racks SPENT FUEL PIT PUMP SUCTION PRESSURE INDICATO C-335 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1PL08J Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

1B DG CONTROL PANEL Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 401.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

4. Is the anchorage free of visible cracks in the concrete near the anchors?Yes Yes 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Welded at base -weld spacing typical to other similar components and judged acceptable Yes C-336 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. I Correspondence No.: RS-12-161 Sheet 2 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1PL08J Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

1 B DG CONTROL PANEL Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/7/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-337 Byron Generating Station Unit 1 12Q0108.20-R-0O1 Rev. I Correspondence No.: RS-12-161 Sheet 3 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1PL08J Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

11B DG CONTROL PANEL Photos C-338 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 4 of 4 Status: El] N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1PL08J Equipment Class: (20) Instrumentation and C Equipment

==

Description:==

11B DG CONTROL PANEL ontrol Panels and Cabinets C-339 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: lPM05J Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

MAIN CONTROL BOARD Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 451.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50% Yes of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors? Yes 5. Is the anchorage configuration consistent with plant documentation? (Note: Yes This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Drawing 6E-O-3391AN Revision F Floor is carpeted but could see/touch weld through carpeting.

Front of panel not visible. Interior not visible due to fireproofing.

Anchorage is judged acceptable based on quality of weld verified.6. Based on the above anchorage evaluations, is the anchorage free of Yes potentially adverse seismic conditions?

C-340 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: lPM05J Equipment Class:- (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

MAIN CONTROL BOARD Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution'systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Masonry walls are seismic and would not collapse on equipment Calculation 8.11.6.9-BYR03-070 Rev 0 was generated to evaluate the ceiling with the conclusion that panels would not fall during a seismic event.9. Do attached lines have adequate flexibility to avoid damage?Yes Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Loose screws on panel back were tightened by equipment operator.Comments Seismic walkdown team M. Delaney & P. Gazda 8/6/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-341 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: lPM05J Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

MAIN CONTROL BOARD Photos I I-MUOJ (AYY~5 UAMINt I b uK~) ibyron 1 ii uuwi 1I-MUbJ (AWB URAUKEU UEILINfi TILE) Byron 1 &2010 1 PM05J Byron 1 & 2 008 C-342 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1PT-0516 Equipment Class: (18) Instruments on Racks Equipment

==

Description:==

S/G LOOP 1A STM PRESS XMTTR Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 377.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Instrument securely mounted on well-supported rack.Yes C-343 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1PT-0516 Equipment Class: (18) Instruments on Racks Equipment

==

Description:==

S/G LOOP 1A STM PRESS XMTTR Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/7/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-344 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: F N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1PT-0516 Equipment Class: (18) Instruments on Racks Equipment

==

Description:==

S/G LOOP 1A STM PRESS XMTTR Photos 1PT-0516 Byron 1 & 2 163 C-345 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 4 Status: N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RD05E Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

REACTOR TRIP SWITCHGEAR Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 451.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchoraae 1. Is anchorage configuration verification required (i.e., is the item one of the 50% Yes of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors? Yes Minor shrinkage cracking in floor judged to be acceptable.

5. Is the anchorage configuration consistent with plant documentation? (Note: Yes This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Anchorage shown on drawing 6E-O-3391D, Rev. AC.6. Based on the above anchorage evaluations, is the anchorage free of Yes potentially adverse seismic conditions?

All cubicle doors opened. All anchorages observed (front, middle, and rear plug welds).C-346 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RD05E Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

REACTOR TRIP SWITCHGEAR Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes Bottom of south side, west door at hinge end is slightly sprung. Door is adequately latched, therefore there is no seismic concern.IRDO5E is bolted to adjacent panel IRDO3E to eliminate spatial interaction issues during a seismic event.8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Masonry wall west of switchgear is adequately restrained and seismic -would not collapse on equipment.

9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Yes Other Adverse Conditions
11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

All cubicle doors opened. No adverse seismic conditions observed.Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: James Griffith Date: 10/5/2012 Philip Gazda 10/5/2012 C-347 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RD05E Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

REACTOR TRIP SWITCHGEAR Photos C-348 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 4 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RD0, E Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

REACTOR TRIP SWITCHGEAR C-349 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: E N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RH01PB Equipment Class: (6) Vertical Pumps Equipment

==

Description:==

PUMP,1B RESIDUAL HEAT REMOVAL ASMBLY Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 364.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50% Yes of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors? Yes Crack in grout at 2 bolts. Bolts are embedded in pier where there are no cracks. Not a structural/seismic issue -acceptable.

IR 1403131 was written to document condition.

5. Is the anchorage configuration consistent with plant documentation? (Note: Yes This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Drawing M-1219 Sheet 2 Revision AC Detail 9 6. Based on the above anchorage evaluations, is the anchorage free of Yes potentially adverse seismic conditions?

C-350 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: r-Y N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RH01PB Equipment Class: (6) Vertical Pumps Equipment

==

Description:==

PUMP,1B RESIDUAL HEAT REMOVAL ASMBLY Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes Yes 9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Boric acid on bolts. Not a structural/seismic issue. IR 1403165 written.Comments Seismic walkdown team M. Delaney & P. Gazda 8/21/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-351 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-1 2-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: Equipment Class: Equipment

==

Description:==

1RHO1PB (6) Vertical Pumps PUMP,1B RESIDUAL HEAT REMOVAL ASMBLY Photos None.C-352 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RH01PB-A Equipment Class: (21) Tanks and Heat Exchangers Equipment

==

Description:==

RH PUMP 1B SEAL COOLER Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 346.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchoracie

1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of Yes potentially adverse seismic conditions?

Securely mounted to pump C-353 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RH01PB-A Equipment Class: (21) Tanks and Heat Exchangers Equipment

==

Description:==

RH PUMP 1B SEAL COOLER Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?
9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Yes Yes Other Adverse Conditions
11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/21/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-354 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: Equipment Class: Equipment

==

Description:==

1 RHOI PB-A (21) Tanks and Heat Exchangers RH PUMP 1B SEAL COOLER Photos I KNUI t-b-/A tsyron 1 ?i z ts-i-i z ui,-C-355 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RH607 Equipment Class: (7) Fluid-Operated Valves Equipment

==

Description:==

RESIDUAL HEAT REMOVAL HX 1B FLOW CONT VLVASMBLY; 8" Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 357.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-356 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1, Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RH607 Equipment Class: (7) Fluid-Operated Valves Equipment

==

Description:==

RESIDUAL HEAT REMOVAL HX 1B FLOW CONT VLV ASMBLY; 8" Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

No structural/seismic issues Comments Seismic walkdown team M. Delaney & P. Gazda 8-21-12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-357 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RH607 Equipment Class: (7) Fluid-Operated Valves Equipment

==

Description:==

RESIDUAL HEAT REMOVAL HX 11B FLOW CONT VLV ASMBLY; 8" Photos 1RH607 Byron 1 & 2 8-21-12 010 C-358 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RH8702A Equipment Class: ' (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

RC LOOP 1C TO RH PMP 1B SUCT ISOL VLV ASMBLY; 12" Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Cont, 377.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments arid findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchoracqe

1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-359 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 4 Status: N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1 RH8702A Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

RC LOOP 1C TO RH PMP 1B SUCT ISOL VLV ASMBLY; 12" Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Permanent scaffold is adequately restrained in accordance with Exelon Scaffold Procedure 9. Do attached lines have adequate flexibility to avoid damage?Yes Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: < James Griffith Date: 10/5/2012 (717 Philip Gazda 10/5/2012 C-360 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1 RH8702A Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

RC LOOP 1C TO RH PMP 1B SUCT ISOL VLV ASMBLY; 12" Photos C-361 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. I Correspondence No.: RS-12-161 Sheet 4 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RH8702A Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

RC LOOP 1C TO RH PMP 1B SUCT ISOL VLVASMBLY; 12" C-362 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet I of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1 RY32MA Equipment Class: (21) Tanks and Heat Exchangers Equipment

==

Description:==

PORV ACCUMULATOR 1A Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Cont, 426.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50% No of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors?Yes 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Tank anchorage consists of pipe trunnions welded to embedded plates on pressurizer coffin wall and is judged acceptable.

Yes C-363 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RY32MA Equipment Class: (21) Tanks and Heat Exchangers Equipment

==

Description:==

PORV ACCUMULATOR 1A Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?
9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Yes Yes Other Adverse Conditions
11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: James Griffith Date: 10/5/2012 Philip Gazda 10/5/2012 C-364 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: Equipment Class: Equipment

==

Description:==

1RY32MA (21) Tanks and Heat Exchangers PORV ACCUMULATOR 1A Photos C-365 Byron Generating Station Unit I 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 4 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RY32MA Equipment Class: (21) Tanks and Heat Exchangers Equipment

==

Description:==

PORV ACCUMULATOR 1A C-366 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RY455A Equipment Class: (7) Fluid-Operated Valves Equipment

==

Description:==

PZR PORV (C/S AT 1PM05J) ASMBLY Project: Byron 1 SWEL Location (Bldg, EIev, Room/Area):

Cont, 451.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-367 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 4 Status: M N U Seismic Walkdown Checklist (SWC)EquipmentID No.: 1RY455A Equipment Class: (7) Fluid-Operated Valves Equipment

==

Description:==

PZR PORV (C/S AT 1PM05J) ASMBLY Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Auxiliary steel members for pipe supports associated with the pipe containing this valve are in contact with/close to the valve. All items are adequately-restrained and move together.

Judged to be acceptable.

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes Yes Yes 9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: r James Griffith Date: 10/5/2012"/ " Philip Gazda 10/5/2012 C-368 Byron Generating Station Unit 1 1200108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RY455A Equipment Class: (7) Fluid-Operated Valves Equipment

==

Description:==

PZR PORV (C/S AT 1PM05J) ASMBLY Photos C-369 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 4 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1 RY455A Equipment Class: (7) Fluid-Operated Valves Equipment

==

Description:==

PZR PORV (C/S AT 1PM05J) ASMBLY 1 RY455A BYRON 008 C-370 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RY8028 Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

PW TO PRT CONTAINMENT ISOLATION VLV Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 387.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?

4.. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-371 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161' Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RY8028 Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

PWTO PRT CONTAINMENT ISOLATION VLV Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?
9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Yes Yes Other Adverse Conditions
11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/8/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012'04' Philip Gazda 10/5/2012 C-372 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. I Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1RY8028 Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

PW TO PRT CONTAINMENT ISOLATION VLV 1RY8028 Byron I & 2 8-8-12 064 C-373 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. I Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SI01T Equipment Class: (21) Tanks and Heat Exchangers Equipment

==

Description:==

REFUELING WATER STORAGE TANK Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

FH Out, 401.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50% No of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors?Yes 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Very large reinforced concrete tank -anchorage not visible (anchored into concrete with reinforcing steel). Judged to be acceptable since there is no deterioration at the joint between the tank and the foundation.

Yes C-374 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SI01T Equipment Class: (21) Tanks and Heat Exchangers Equipment

==

Description:==

REFUELING WATER STORAGE TANK Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Yes Other Adverse Conditions
11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Minor concrete cracking/spalling and judged to have no structural impact.Comments Seismic walkdown team M. Delaney & P. Gazda 8/7/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-375 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: Equipment Class: Equipment

==

Description:==

1SI01T (21) Tanks and Heat Exchangers REFUELING WATER STORAGE TANK Photos C-376 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SI8801B Equipment Class: (7) Fluid-Operated Valves CHG PMP TO COLD LEGS INJECTION ISOL VLV (C/S AT 1 PM05J)Equipment

==

Description:==

ASMBLY; 4" Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 375.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchoracie

1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-377 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1S18801B Equipment Class: (7) Fluid-Operated Valves CHG PMP TO COLD LEGS INJECTION ISOL VLV (C/S AT 1PM05J)Equipment

==

Description:==

ASMBLY; 4" Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

No structural/seismic issues Comments Seismic walkdown team M. Delaney & P. Gazda 8-8-12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 6 .7 Philip Gazda 10/5/2012 C-378 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1S18801B Equipment Class: (7) Fluid-Operated Valves CHG PMP TO COLD LEGS INJECTION ISOL VLV (C/S AT 1PM05J)Equipment

==

Description:==

ASMBLY; 4" 1S18801B Byron I & 2 8-8-12 062 C-379 Byron Generating Station Unit I 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1S18804B Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

ASSY -MOV 1B RH HX TO 1B SI PP SUCT HDR ISOL VLV Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 364.00 Ift, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-380 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-1 2-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SI8804B Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

ASSY -MOV 1B RH HX TO 1B SI PP SUCT HDR ISOL VLV Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safetyfunctions of the equipment?

Check valve on this pipe is close to north wall but laterally braced to south wall so this is not an issue.Comments Seismic walkdown team M. Delaney & P. Gazda 8/8/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-381 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1 S18804B Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

ASSY -MOV 1B RH HX TO 1B SI PP SUCT HDR ISOL VLV Photos C-382 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID-No.: 1S18809B Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

RH TO COLD LEGS 1B/1C ISOL VLV (1PM06J) ASMBLY; 8" Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 364.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-383 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1S18809B Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

RH TO COLD LEGS 1B/1C ISOL VLV (1PM06J) ASMBLY; 8" Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/8/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-384 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: Equipment Class: Equipment

==

Description:==

1 S18809B (8) Motor-Operated and Solenoid-Operated Valves RH TO COLD LEGS 1 B/i C ISOL VLV (1 PM06J) ASMBLY; 8" Photos 1S18809B Byron 1 & 2 8-8-12 054 C-385 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SX005 Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

U-O CC HX INLT VLV ASMBLY; 30" Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 330.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-386 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SX005 Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

U-0 CC HX INLT VLV ASMBLY; 30" Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Yes Other Adverse Conditions
11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/10/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-387 Byron Generating Station Unit 1 1200108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SX005 Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves Equipment

==

Description:==

U-O CC HX INLT VLV ASMBLY; 30" Photos 1SX005 Byron I & 2 8-10-12 038 C-388 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SX01FB Equipment Class: (0) Other Equipment

==

Description:==

1B SX PP DSCH STRN Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 330.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

Yes 2. Is the anchorage free of bent, broken, missing or loose hardware?Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors?Yes 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Drawing M-1218 Revision AA Detail 1 6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes Yes C-389 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 4 Status: r] N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SX01FB Equipment Class: (0) Other Equipment

==

Description:==

1B SX PP DSCH STRN Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/10/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-390 Byron Generating Station Unit 1 12Q0108.20-R-O01 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SXOIFB Equipment Class: (0) Other Equipment

==

Description:==

1 B SX PP DSCH STRN Photos C-391 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 4 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: Equipment Class: Equipment

==

Description:==

1 SX0 PFB (0) Other 1lB SX PP DSCH STRN C-392 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SX01PB Equipment Class: (5) Horizontal Pumps Equipment

==

Description:==

PUMP,1B ESSENTIAL SER WTR ASMBLY Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 330.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50% Yes of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors? Yes 5. Is the anchorage configuration consistent with plant documentation? (Note: Yes This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Drawing M-1218 Revision AA 6. Based on the above anchorage evaluations, is the anchorage free of Yes potentially adverse seismic conditions?

C-393 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: ISXO1PB Equipment Class: (5) Horizontal Pumps Equipment

==

Description:==

PUMP,1 B ESSENTIAL SER WTR ASMBLY Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Yes Other Adverse Conditions
11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/10/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-394 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: Equipment Class: Equipment

==

Description:==

1SX01PB (5) Horizontal Pumps PUMP,1B ESSENTIAL SER WTR ASMBLY Photos Photos C-395 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SX169B Equipment Class: (7) Fluid-Operated Valves Equipment

==

Description:==

DG lB SX VLVASMBLY; 10" Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 401.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchora-qe

1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-396 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SX169B Equipment Class: (7) Fluid-Operated Valves Equipment

==

Description:==

DG lB SXVLVASMBLY; 10" Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

No structural/seismic issues Comments Seismic walkdown team M. Delaney & P. Gazda 8-7-12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-397 Byron Generating Station Unit I 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SX169B Equipment Class: (7) Fluid-Operated Valves Equipment

==

Description:==

DG 1B SX VLV ASMBLY; 10" Photos 1SX169B Byron I & 2205 C-398 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SX173 Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves SX SUP VLV TO ENG Driven CLG W'TR PP FOR Diesel Driven AF PPASSY;Equipment

==

Description:==

6" Project: Byron I SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 383.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-399 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SX173 Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves SX SUP VLV TO ENG Driven CLG WTR PP FOR Diesel Driven AF PPASSY;Equipment

==

Description:==

6" Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

9. Do attached lines have adequate flexibility to avoid damage?Yes Yes Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Other Adverse Conditions
11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

No structural/seismic issues Comments Seismic walkdown team M. Delaney & P. Gazda 8/20/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-400 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1SX173 Equipment Class: (8) Motor-Operated and Solenoid-Operated Valves SX SUP VLV TO ENG Driven CLG WTR PP FOR Diesel Driven AF PPASSY;Equipment

==

Description:==

6" Photos C-401 Byron Generating Station Unit 1 12Q0O108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1TE-0604 Equipment Class: (19) Temperature Sensors Equipment

==

Description:==

RHR LP 1A RETURN TEMPERATURE RTD Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 375.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-402 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1TE-0604 Equipment Class: (19) Temperature Sensors Equipment

==

Description:==

RHR LP 1A RETURN TEMPERATURE RTD Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/21/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-403 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1TE-0604 Equipment Class: (19) Temperature Sensors Equipment

==

Description:==

RHR LP 1A RETURN TEMPERATURE RTD Photos None.C-404 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1TE-RC022A Equipment Class: (19) Temperature Sensors Equipment

==

Description:==

RC WIDE RANGE LP 1A TEMP Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Cont, 390.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-405 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1TE-RC022A Equipment Class: (19) Temperature Sensors Equipment

==

Description:==

RC WIDE RANGE LP 1A TEMP Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?
9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Yes Yes Other Adverse Conditions
11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: James Griffith Date: 10/5/2012 Philip Gazda 10/5/2012 C-406 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: Equipment Class: Equipment

==

Description:==

1TE-RC022A (19) Temperature Sensors RC WIDE RANGE LP 1A TEMP Photos Photos 1TE-RC022 BYRON 022 C-407 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1TI-0628 Equipment Class: (19) Temperature Sensors Equipment

==

Description:==

SPENT FUEL POOL HEAT EXCH OUTLET TEMP INDICAT Project: Byron I SWEL Location (Bldg, Elev, Room/Area):

FH, 426.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-408 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: MZ N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1TI-0628 Equipment Class: (19) Temperature Sensors Equipment

==

Description:==

SPENT FUEL POOL HEAT EXCH OUTLET TEMP INDICAT Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

NRC questioned the top bolt on the double clamp detail. Other supports in area used a pin rather than a bolt. This configuration is consistent with typical mechanical pipe support clamps and not an issue. Clarified with NRC by Jeff Sanchez.Comments Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos C-409 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1TI-0628 Equipment Class: (19) Temperature Sensors Equipment

==

Description:==

SPENT FUEL POOL HEAT EXCH OUTLET TEMP INDICAT 2 8-9-12 015 C-410 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA01SB Equipment Class: (5) Horizontal Pumps Equipment

==

Description:==

1B SX Pp Cub Cooler ESSENTIAL SERVICE WATER PUMP 95-10 Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 330.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50% Yes of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors? Yes Very small cracks in grout pad that do not extend beyond grout surface. Not a structural or seismic issue.5. Is the anchorage configuration consistent with plant documentation? (Note: Yes This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Drawing M-1218 Revision AA Detail 83 6. Based on the above anchorage evaluations, is the anchorage free of Yes potentially adverse seismic conditions?

C-411 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA01SB Equipment Class: (5) Horizontal Pumps Equipment

==

Description:==

1B SX Pp Cub Cooler ESSENTIAL SERVICE WATER PUMP 95-10 Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/10/12 am Unit houses 1VA01E -1VA01H components Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-412 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA01SB Equipment Class: (5) Horizontal Pumps Equipment

==

Description:==

1B SX Pp Cub Cooler ESSENTIAL SERVICE WATER PUMP 95-10 Photos 1VA01SB Byron I & 2 8-10-12 036 C-413 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 4 Status: E N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA02SB Equipment Class: (10) Air Handlers Equipment

==

Description:==

11B RHR PUMP ROOM CUB CLR ASMBLY Project: Byron I SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 346.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50% Yes of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors? Yes Multiple cracks in grout pad that do not extend into base slab. IR 1403145 was written. Grout is for leveling and cosmetic reasons and the cracks are not a concern.5. Is the anchorage configuration consistent with plant documentation? (Note: Yes This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Drawing M-1219 Sheet 3 Revision AH 6. Based on the above anchorage evaluations, is the anchorage free of Yes potentially adverse seismic conditions?

C-414 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-1 2-161 Sheet 2 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA02SB Equipment Class: (10) Air Handlers Equipment

==

Description:==

16 RHR PUMP ROOM CUB CLR ASMBLY Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?
9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Yes Yes Other Adverse Conditions
11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/21/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-415 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA02SB Equipment Class: (10) Air Handlers Equipment

==

Description:==

1B RHR PUMP ROOM CUB CLR ASMBLY Photos C-416 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 4 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA02SB Equipment Class: (10) Air Handlers Equipment

==

Description:==

1B RHR PUMP ROOM CUB CLR ASMBLY* * .C-417 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA06SA Equipment Class: (10) Air Handlers Equipment

==

Description:==

COOLER,CENTRIFUGAL CHARGING PUMP 1A Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 364.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchora-ae

1. Is anchorage configuration verification required (i.e., is the item one of the 50% Yes of SWEL items requiring such verification)?
2. Is the anchorage free of bent, broken, missing or loose hardware?

Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors? Yes 5. Is the anchorage configuration consistent with plant documentation? (Note: Yes This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Drawing M-1219 Sheet 3 Revision AH 6. Based on the above anchorage evaluations, is the anchorage free of Yes potentially adverse seismic conditions?

C-418 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA06SA Equipment Class: (10) Air Handlers Equipment

==

Description:==

-COOLERCENTRIFUGAL CHARGING PUMP 1A Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes Yes 9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes'Other Adverse Conditions

'11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/20/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-419 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: F N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA06SA Equipment Class: (10) Air Handlers Equipment

==

Description:==

COOLER,CENTRIFUGAL CHARGING PUMP 1A Photos C-420 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA08CB Equipment Class: (10) Air Handlers Equipment

==

Description:==

1B DIESEL DRIVEN AF PUMP CUBICLE CLR (1VA08S) 1B FAN Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 383.00 ft, ALL, Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Not Applicable

3. Is the anchorage free of corrosion that is more than mild surface oxidation?
4. Is the anchorage free of visible cracks in the concrete near the anchors?5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable Not Applicable Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Supported by a large frame mounted to skid and hung from above. No direct anchorage to structure.

Yes C-421 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA08CB Equipment Class: (10) Air Handlers Equipment

==

Description:==

1B DIESEL DRIVEN AF PUMP CUBICLE CLR (1VA08S) 1B FAN Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/20/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-422 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: Equipment Class: Equipment

==

Description:==

1VA08CB (10) Air Handlers 1B DIESEL DRIVEN AF PUMP CUBICLE CLR (1VA08S) 1B FAN I VAUMSL; bIyron 1 & z ts-zu-1 izu66i C-423 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA11J Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

CENTRIFUGAL CHARGING PCUBICLE COOLER LOCAL CONTROL PANEL Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 364.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchoraae 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors?Yes 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-424 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA11J Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

CENTRIFUGAL CHARGING PCUBICLE COOLER LOCAL CONTROL PANEL Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions
11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/8/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-425 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VA11J Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

CENTRIFUGAL CHARGING PCUBICLE COOLER LOCAL CONTROL PANEL Photos None.C-426 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: Y N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VD01CB Equipment Class: (9) Fans Equipment

==

Description:==

1B DG ROOM HVAC FAN ASMBLY Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 401.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchoraaqe

1. Is anchorage configuration verification required (i.e., is the item one of the 50% Yes of SWEL items requiring such verification)?
2. Is the anchorage free of bent, broken, missing or loose hardware?

Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors? Yes 5. Is the anchorage configuration consistent with plant documentation? (Note: Yes This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Drawing M-1222 Sheet 6 Rev K Detail 93 Cannot measure bolt diameter since only the bolt head is visible (No bolt projection)

Width across flat of nut equals approximately 1" which corresponds to a 5/8" bolt per AISC 9th edition 4-142 (1/16" difference is negligible and within measuring tolerances)

6. Based on the above anchorage evaluations, is the anchorage free of Yes potentially adverse seismic conditions?

C-427 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: IVDOICB Equipment Class: (9) Fans Equipment

==

Description:==

1B DG ROOM HVAC FAN ASMBLY Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Adjacent permanent scaffold is well-secured and well-supported.

Scaffold not labeled as permanent.

IR 1398177 written to add tag. Not a structural/seismic issue 9. Do attached lines have adequate flexibility to avoid damage?Yes Yes Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8-7-12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-428 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. I Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: IVD01CB Equipment Class: (9) Fans Equipment

==

Description:==

1 B DG ROOM HVAC FAN ASMBLY Photos 1VD01CB Bvron 1 & 2 200 1VD01CB Byron 1 & 2 201 1 vuul L~b yron 1 & z /us C-429 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 4 of 4 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VD01CB Equipment Class: (9) Fans Eauioment Descriotion:

1B DG ROOM HVAC FAN ASMBLY C-430 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VE05C Equipment Class: (9) Fans Equipment

==

Description:==

ASSY -U-1 MISC ELEC EQUIP RM DIV 12 EXH FAN Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 463.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors?Yes 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Fan is anchored at ceiling, well-supported and acceptable.

Not Applicable Yes C-431 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: IVE05C Equipment Class: (9) Fans Equipment

==

Description:==

ASSY -U-1 MISC ELEC EQUIP RM DIV 12 EXH FAN Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?
9. Do attached lines have adequate flexibility to avoid damage?10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Yes Yes Yes Other Adverse Conditions
11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8-8-12 am Evaluated by: Marlene Delaney Date: 10/5/2012Philip Gazda 10/5/2012 C-432 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VE05C Equipment Class: (9) Fans Equipment

==

Description:==

ASSY -U-1 MISC ELEC EQUIP RM DIV 12 EXH FAN Photos S. .!AF 1VE05C Byron 1 & 2 8-8-12 015 C-433 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 5 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VP01AA Equipment Class: (10) Air Handlers Equipment

==

Description:==

CNMT ESS'L SERVICE WATER COIL 1A (RCFC)Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Cont, 377.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50%of SWEL items requiring such verification)?

No 2. Is the anchorage free of bent, broken, missing or loose hardware?Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors?Yes 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Not Applicable

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Yes C-434 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 5 Status: Y-] N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VP01AA Equipment Class: (10) Air Handlers Equipment

==

Description:==

CNMT ESS'L SERVICE WATER COIL 1A (RCFC)Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Yes 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Yes 9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: James Griffith Date: 10/5/2012 Philip Gazda 10/5/2012 C-435 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 5 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: Equipment Class: Equipment

==

Description:==

Photos IVP01AA (10) Air Handlers CNMT ESS'L SERVICE WATER COIL 1A (RCFC)C-436 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 4 of 5 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VP01AA Equipment Class: (10) Air Handlers Equipment

==

Description:==

CNMT ESS'L SERVICE WATER COIL 1A (RCFC)C-437 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 5 of 5 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VPOIAA Equipment Class: (10) Air Handlers Equipment

==

Description:==

CNMT ESS'L SERVICE WATER COIL 1A (RCFC)C-438 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. I Correspondence No.: RS-12-161 Sheet 1 of 3 Status: N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VX07J Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

ESF SWGR RM DIV 12 HVAC DMPR START PNL Project: Byron 1 SWEL Location (Bldg, Elev, Room/Area):

Auxiliary, 426.00 ft, ALL Manufacturer/Model:

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of this checklist for documenting other comments.Anchorage 1. Is anchorage configuration verification required (i.e., is the item one of the 50% Yes of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

Yes 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Yes 4. Is the anchorage free of visible cracks in the concrete near the anchors? Yes 5. Is the anchorage configuration consistent with. plant documentation? (Note: Yes This question only applies if the item is one of the 50% for which an anchorage configuration verification is required.)

Drawing 6E-0-3391H Revision AH 6. Based on the above anchorage evaluations, is the anchorage free of Yes potentially adverse seismic conditions?

C-439 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 3 Status: M N U Seismic Walkdown Checklist (SWC)Equipment ID No.: 1VX07J Equipment Class: (20) Instrumentation and Control Panels and Cabinets Equipment

==

Description:==

ESF SWGR RM DIV 12 HVAC DMPR START PNL Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not likely to collapse onto the equipment?

Masonry walls are seismic and would not collapse on equipment Yes Yes 9. Do attached lines have adequate flexibility to avoid damage?Yes 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?Yes Other Adverse Conditions

11. Have you looked for and found no adverse seismic conditions that could Yes adversely affect the safety functions of the equipment?

Comments Seismic walkdown team M. Delaney & P. Gazda 8/8/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 C-440 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 3 Status: [T N U Seismic Walkdown Checklist (SWC)Equipment ID No.: Equipment Class: Equipment

==

Description:==

Photos None.1VX07J (20) Instrumentation and Control Panels and Cabinets ESF SWGR RM DIV 12 HVAC DMPR START PNL C-441 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 D Area Walk-By Checklists (AWCs)Table D-1 provides the building, elevation, and location of each area as well as a list of SWEL items associated with each area, and page numbers of each Area Walk-By Checklist.

D-1 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Table D-1. Summary of Area Walk-By Checklists AREA COMPONENT WA DESCRIPTION C O COMMENTS PAGE WALK-BY ID 1 Aux El 451 Unit 1 and 2 Control Room 1PM05J D -5 5 Aux El 463 Upper Cable Spreading Room (0VC08Y) OVC08Y D-7 6 Aux El 451 U1 & U2 HV(OVC08Y, OVC09Y) 0VC09Y D- 9 1 PA01 J 1 PA02J 1 PA03J 1 PA04J 1 PA06J 1 PA07J 1 PA08J 1 PA09J 1 PA1 OJ 1PA12J 1PA14J 1PA27J 1 PA28J 1PA33J 1 PA34J 1PA51J 8 Aux El 451 Unit 1 AEER 1PA52J D- 11 Aux El 451 Unit 1 and 2 (U1 HV -OVC01JA, OVC01JA 9 OVC15J, OVC02FA) 0VC15J D-13 12 RWST Ul and U2 (outside) 1SI01T D -15 13 Aux El 401 MSIV 1B/IC Room 1MS018B D -17 14 Aux El 377 MSIV 1A/1D Room 1PT-0516 D -19 lMS001A 15 Aux El 401 MSIV 1A/ID Room 1MS018A D -21 1AP93E 16 ESWCT El 377 Unit 1 SX A Cooling Room 1AP99E D -23 0SX162A 18 ESWCT Alpha Valve Room OWWO19A D -25 1AP92E 20 ESWCT South Elec Room 1AP98E D -27 22 ESWCT ROOF NONE D -29 1DG01KB 1PL08J 1SX169B 23 Aux El 401, Diesel Generator 1DG01KB 1VD01CB D -31 26 Aux El 373, Diesel Oil Storage Tank Room 1D001 TB D -33 1DC05E lDC10J IlP05E IlP07E 28 Aux El 451 UI MEER Division 1 1RD05E D -35 29 Aux El. 451, Battery Room 111 1DC01 E -37 Table D-1 Page 1 of 3 D-2 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 AREA COMPONENT WA DESCRIPTION C D COMMENTS PAGE.WALK-BY I D 1 DC04E 1 DC06E 1DC11J 11P08E 30 Aux El 451, U1 MEER Division 2 1VE05C D -39 31 Aux El 451, Battery Room 112 IDC02E D -41 1AP06E 1AP12E 1AP13E 32 Aux El 426, Div 12 Switchgear Room 1VX07J D -43 33 Aux El 426, U1 4kV Div 1/Div 11 Room 1AP11E D -45 36 OFC03PA SWEL 2 0FC8763 SWEL 2 OTI-FC007 SWEL 2_Aux El 364 Area 5 (curved wall near MCC) 1AP21E D -47 1CV01PB _ICV02SB 37 Aux El 364 Centrifugal Charging Pump 1B 1VA11J D -49 1 LT-0932 38 Aux El 364 & 379 RWST Tunnel 1S18804B D -51 1CC685 1CV1 12E 1 CV8152 1FC010 SWEL 2 1 FC8758 SWEL 2 1 FC8766 SWEL 2 1 RY8028 1S18801B 1S18809B 39 Aux El varies, Area 5 curved wall at penetrations 1TE-0604 D -53 40 Fuel Handling, El 426 OTIS-0626 SWEL 2 D -55 41 1FC01A SWEL 2 1FC8762A SWEL 2 1FC8762B SWEL 2 1FC8793 SWEL 2 1 FC8794 SWEL 2_FH El 401 U1 Spent Fuel HX Room 1TI-0628 SWEL 2 D -57 42 0FC8754 SWEL 2 1FC01P SWEL 2 1 FC8756 SWEL 2 FH El 401 U1 & U2 Spent Fuel Pump Room 1HS-FC001 SWEL 2 D -59 44 OPI-FC003 SWEL 2 1 PI-0627 SWEL 2 FH El 401 Adjacent to truckbay 1 PI-0633 SWEL 2 D -61 45 RSH El 702, A & B Pump Room OSX02PB D -63 46 RSH El 702, Diesel Oil Storage Tank Room ODO08TB D -65 47 Aux El 364 Unit 1 (open area) 1AF005E D -67 Table D-1 Page 2 of 3 D-3 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 AREA COMPONENT WA DESCRIPTION C D COMMENTS PAGE WALK-BY ID 50 Aux El 346, Unit 1 near 1AP38E 1AP38E D -69 52 1SX005 1SX01FB 1SX01PB_Aux El 330, B SX Pump Room 1VA01SB D -71 53 Aux El 426 near Q-12, S-13 1AP27E D -73 54 Aux El 414, Elec Penetration Area 1AP25E D -75 57 Aux El 383 (work with AWC 59) 1AP24E D -77 1AF006B 1AF017B 1AFO1EA-1 1AF01EB-A 1AF01PB 1AF024 1DO10T 1SX173 58 Aux El 383 1 B Aux Feed Pump Room 1VA08CB D -79 1AP22E 59 Aux El 383 (See AWC 57) 1FT-0132 D -81 61 OPI-FC005 SWEL 2 1CC01PB 1 FT-01 21_Aux El 364 UI and U2 open area 1FT-AFO14 D -83 62 Aux El 364, Centrifugal Charging Pump 1A 1VA06SA D -85 64 Aux El 364 1B RH HX Room 1RH607 D -87 64a Aux El 364 MCR Chillers 0WO01CB D -89 66 1RH01PB 1RH01PB-A_Aux El 1B RH Pump Room 1VA02SB D -91 Outage-1 Cont El 426 near 1RY32MA 1 RY32MA D -93 Outage-2 Cont El 451 near 1RY455A 1RY455A D- 95 Outage-3 Cont El 412 near 1LT-0518 1LT-0518 D -97 Outage-4 Cont El 377 near 1 RH8702A 1 RH8702A D -99 Outage-5 Cont El 377 near 1VP01AA (inside Plenum) 1VP01AA D -101 Outage-6 Cont El 377 near 1 LT-0459 1 LT-0459 D -103 Outage-7 Cont El 390 near 1TE-RC022A 1TE-RC022A D -105 Table D-1 Page 3 of 3 D-4 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet I of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 01 Aux El 451 Unit I and 2 Control Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Calculation 8.11.6.9-BYR03-070 Rev 0 generated for ceiling tiles and determined that they would not fall in a seismic event.Diffuser panel at Panels lPMO7J and IPMO8J is sagging but it is not a structural/seismic issue since they are lightweight and would have no impact if they fell -IR 1397699 written for repair 5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and D-5 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 01 Aux El 451 Unit 1 and 2 Control Room temporary installations (e.g., scaffolding, lead shielding)?

Locker and cabinets on east wall have adequate standoff distance that there are no seismic interaction issues with safety related equipment.

Also the cabinets and locker are on carpeting and would not easily slide due to friction between the carpet and cabinets.8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?There are loose screws on the backs of several control board panels. Most were tightened by the equipment operator as the walkdowns were performed.

The following IR addresses screws that were stripped or couldn't be tightened:

IR 1399487 Comments Seismic walkdown team M. Delaney & P. Gazda 8/6/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None D-6 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 05 Aux El 463 Upper Cable Spreading Room (OVC08Y)Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?Roof drain has Vitaulic couplings but piping is well-supported laterally and vertically and is acceptable.
6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-7 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 05 Aux El 463 Upper Cable Spreading Room (OVC08Y)8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Water damage at hose station is not a structural/seismic issue since it is not near critical components Bent tray cover (21921BKIB) is not a structural/seismic issue since tray cover does not function as a structural component

-purpose is to protect cables Comments Seismic walkdown team M. Delaney & P. Gazda 8/6/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 jrý Philip Gazda 10/5/2012 Photos None.D-8 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: I N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 06 Aux El 451 U1 & U2 HV( OVC09Y)Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment 5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-9 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 06 Aux El 451 Ul & U2 HV( OVC09Y)8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Water on floor due to leak above and drain line condensation.

Not a structural/seismic issue since not near critical components

-acceptable.

Yes Comments Seismic walkdown team M. Delaney & P. Gazda 8/6/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-1 0 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 08 Aux El 451 Unit 1 AEER Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

See discussion in Section 5 of report to address cove molding at anchorage detail. Anchorage is judged to be acceptable.

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Numerous partially open S-hooks identified.

It is unlikely that the lights would become disengaged since the hooks are only partially open and not all hooks are open -judged acceptable.

IR 1397693 written.Masonry walls are seismic and would not collapse on equipment.

5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-11 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 08 Aux El 451 Unit 1 AEER 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Comments.Seismic walkdown team M. Delaney & P. Gazda 8/6/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-12 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: N U Area Walk-By Checklist (AWC)Area Walk-by 09 Aux El 451 Unit 1 and 2 (Ul HV -OVC01JA, Location (Bldg, Elev, Room/Area):

OVC15J, OVC02FA)Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment 5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?Fire protection piping is well-supported.

Fire protection valve 0FP332 valve is leaking but is not near critical components so not an immediate concern.IR1397710 was written to repair.Roof drain line with Victaulic couplings enters room and drops down and up (similar to a U shape) and exits room. Line could swing from side to side resulting in leaking at the top couplings however the equipment below is partially sealed with closed entry points and tops so no water damage could occur. IR 1397711 was written.6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-1 3 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Area Walk-by 09 Aux El 451 Unit 1 and 2 (Ul HV -OVC01JA, Location (Bldg, Elev, Room/Area):

OVCl5J, OVC02FA)7. Does it appear that the area is free of potentially adverse seismic interactions associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Yes 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic walkdown team M. Delaney & P. Gazda 8/6/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 4 Philip Gazda 10/5/2012 Photos None.D-14 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 12 RWST U1 and U2 (outside)Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-1 5 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: Y N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 12 RWST Ul and U2 (outside)7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Two very large scaffolds adjacent to tanks are well-braced and anchored -acceptable.

Equipment carts near tanks have wheels chocked -not credible considering tank configuration (large reinforced concrete tank)8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Minor concrete spalling/cracking

-no structural/seismic impact.Comments Seismic walkdown team M. Delaney & P. Gazda 8/7/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-16 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 13 Aux El 401 MSIV 1 B/1 C Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets)?

Yes 2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

Yes 3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Yes 4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Yes 5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?Yes 6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?Yes D-1 7 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: E-i N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 13 Aux El 401 MSIV 1B/lC Room 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Loose handrail tied off with rope in accordance with Byron Seismic Housekeeping Procedure Permanent scaffolds in area is well-supported and tied off in accordance with Exelon Scaffold Procedure 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Degradation at ceiling at containment wall. The joints in question are made up of some sort of compressible/flexible material.

Since the containment structure is a standalone structure and is analyzed and designed that way there is a gap between it and an adjacent structure (like the MSIV rooms). The gap is sized to allow seismic movements of each structure and is filled with the flexible material.

The material is only there to close the opening and has no structural or seismic significance.

Comments Seismic walkdown team M. Delaney & P. Gazda 8/7/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-1 8 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 14 Aux El 377 MSIV 1A/1D Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets)?

Yes 2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

Yes 3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Yes 4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Yes 5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?Yes 6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?Yes 7. Does it appear that the area is free of potentially adverse seismic interactions associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Yes D-1 9 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 14 Aux El 377-MSIV 1A/1D Room 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?NRC identified broken FME cover. IR 1398194 written. Not a structural/seismic issue.Yes Comments Seismic walkdown team M. Delaney & P. Gazda 8/7/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-20 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 15 Aux El 401 MSIV 1A/1D Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets)?

Yes 2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

Yes 3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Yes 4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Yes 5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?Yes 6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?Yes D-21 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 15 Aux El 401 MSIV 1A/1 D Room 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Permanent scaffolds well-supported and tied off in accordance with Exelon Scaffold Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Floor seal at containment is degraded.

IR 1398191 written. Not a structural/seismic issue since the joint is not a barrier and does serve a structural function.Yes Comments Seismic walkdown team M. Delaney & P. Gazda 8/7/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-22 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 16 ESWCT El 377 Unit 1SX A Cooling Room (Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets)?

Yes 2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

Yes 3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Yes 4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Yes 5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?Yes 6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?Yes D-23 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: Y N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 16 ESWCT El 377 Unit 1 SX A Cooling Room (7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Partially open S-hooks in room. Unlikely that lights would disengage since the hooks are only slightly open and not all hooks are open.- Therefore acceptable.

IR 1398127 written to close.Operation HVS gear cabinet on west wall has adequate standoff distance in accordance with Byron Seismic Housekeeping Procedure.

8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Hairline diagonal cracks on east and south wall and at door frame on west wall (upper corner). Cracks are small and therefore judged not to be a structural/seismic issue (noted for NP-6695).Paint peeling on south wall -not a structural/seismic issue Comments Seismic walkdown team M. Delaney & P. Gazda 8/7/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None, D-24 Byron Generating Station Unit 1 12QO108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 18 ESWCT Alpha Valve Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets)?

Yes 2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

Yes 3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Yes 4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Yes 5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?Yes 6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?Yes 7. Does it appear that the area is free of potentially adverse seismic interactions associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Yes D-25 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 18 ESWCT Alpha Valve Room 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Hairline vertical crack on west wall. Judged not to be a structural/seismic issue since the crack is small.Comments Seismic walkdown team M. Delaney & P. Gazda 8/7/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-26 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 20, ESWCT South Elec Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

S-hooks appear closed from floor. IR 1398127 written as an extent of condition to check all S-hooks in ESWCT.5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-27 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 20, ESWCT South Elec Room 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Storage box at south wall more than 12" away from transformer in accordance with Byron Seismic Housekeeping Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area? *Water leaking at north wall (not active leak), numerous small cracks in concrete -judged not to be a structural/seismic issue.Missing bolt at IAP98E top panel -adequate bolts in place -judged not a structural/seismic issue Yes Comments Seismic walkdown team M. Delaney & P. Gazda 8/7/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-28 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 22 ESWCT roof Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

Eight SX Cooling Tower Motors are well-anchored.

No other components in area.2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?

3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-29 Byron Generating Station Unit 1.12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: V] N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 22 ESWCT roof 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Small cracks in concrete -judged not to be a structural/seismic issue due to the small size No overhead components and no seismic spatial interaction issues.Comments Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-30 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 23, Aux El 401, Diesel Generator lDG01KB Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment 5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-31 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 23, Aux El 401, Diesel Generator 1DG01KB 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-32 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 26, Aux El 373, Diesel Oil Storage Tank Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?

Crack in grout pad for 1DOO1 TD that does not extend into the base slab.See SWC for 1DOO1 TB and IR 1398190. Hairline crack is acceptable.

3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-33 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 26, Aux El 373, Diesel Oil Storage Tank Room 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic walkdown team M. Delaney & P. Gazda 8/7/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-34 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 28, Aux El 451 UL1 MEER Division 1 Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?2 cable risers open but secured with grips -acceptable
4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment 5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?Roof drain piping in room has Victaulic couplings but piping is vertically and laterally well-supported.

6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-35 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 28, Aux El 451 UL1 MEER Division 1 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic walkdown team M. Delaney & P. Gazda 8/8/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-36 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 29, Aux El. 451, Battery Room 111 Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and could not collapse on equipment.

S hooks appear closed but many are not visible. IR 1399377 written to address extent of condition and follow-up S-hook inspection

5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-37 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: Y] N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 29, Aux El. 451, Battery Room 111 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Comments Seismic walkdown team M. Delaney & P. Gazda 8/8/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-38 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 30, Aux El 451, U1 MEER Division 2 Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment 5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-39 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 30, AuxEl 451, U1 MEER Division 2 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic walkdown team M. Delaney & P. Gazda 8/8/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-40 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 31, Aux El 451, Battery Room 112 Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from. the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

S hooks appear closed but many are not visible. IR 1399380 written to address extent of condition and follow-up S-hook inspection Masonry walls are seismic and would not collapse on equipment 5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-41 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: FY] N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 31, Aux El 451, Battery Room 112 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic walkdown team M. Delaney & P. Gazda 8/8/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-42 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 32, Aux El 426, Div 12 Switchgear Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment.

Open S-hooks addressed in IR 1398568. S-hooks are only partially open and it is unlikely the lights would disengage

-acceptable.

5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-43 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: F] N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 32, Aux El 426, Div 12 Switchgear Room 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Operations bench is away from components in accordance with Byron Seismic Housekeeping Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Minor cracking in fire protection at column -not a structural/seismic issue since the cracks are small Yes Comments Seismic walkdown team M. Delaney & P. Gazda 8/8/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-44 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 33, Aux El 426, U1 4kV Div 1/Div 11 Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment.

Open S-hooks. IR 1398568 was written. S-hooks not a concern since openings are not large enough for chains to fall out but should be closed.5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-45 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 33, Aux El 426, U1 4kV Div 1/Div 11 Room 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Spare breaker in breaker storage area -in accordance with Byron Seismic Housekeeping Procedure.

Ops bench far enough away from equipment

(>12') -not an issue in accordance with Byron Seismic Housekeeping Procedure.

8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Shrinkage cracks in floor and wall -not a structural/seismic issue.Yes Comments Seismic walkdown team M. Delaney & P. Gazda 8/8/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-46 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 36, Aux El 364 Area 5 (curved wall near MCC)Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-47 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 36, Aux El 364 Area 5 (curved wall near MCC)8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Comments Seismic walkdown team M. Delaney & P. Gazda 8/8/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-48 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 37, Aux El 364 Centrifugal Charging Pump 11B Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets)?

Yes 2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

Yes 3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Yes Yes Yes 5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?Yes 7. Does it appear that the area is free of potentially adverse seismic interactions associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Yes D-49 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 37, Aux El 364 Centrifugal Charging Pump 1 B 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/8/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-50 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 38, Aux El 364 & 379 RWST Tunnel Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

Yes Yes Yes 3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Yes 5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?Yes 6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?Yes 7. Does it appear that the area is free of potentially adverse seismic interactions associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Yes D-51 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: V N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 38, Aux El 364 & 379 RWST Tunnel 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team 8/8/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-52 Byron Generating Station Unit 1 12Q0108.20-R-0O01 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 39, Aux El varies, Area 5 curved wall at penetrations Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The spacebelow each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets)?

Yes 2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

Yes 3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Yes 4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Yes 5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?Yes 6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?Yes 7. Does it appear that the area is free of potentially adverse seismic interactions associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Yes D-53 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 39, Aux El varies, Area 5 curved wall at penetrations

8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Boric Accumulation identified by operator -not an active leak. IR 1398667.Not a structural/seismic issue Yes Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/8/12 pm and 8/21/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-54 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet I of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 40, Fuel Handling, El 426 Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets)?

Yes 2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

Yes 3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Yes 4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?Yes Yes Yes 6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Yes D-55 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 40, Fuel Handling, El 426 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/9/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-56 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 41, FH El 401 Ul Spent Fuel HX Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment.

Removable seismic blocks walls secured by grating.5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-57 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 41, FH El 401 Ul Spent Fuel HX Room 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?NRC questioned if the first support from Valve IFC8762 was acceptable since the top bolt of the double clamp was a bolt while other supports in the area were pins. Support matches design drawing and is acceptable.

Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/9/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-58 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 42, FH El 401 UL1 & U2 Spent Fuel Pump Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment.

5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?Sight glasses are protected with no potential impact from overhead components
7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-59 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 42, FH El 401 U1 & U2 Spent Fuel Pump Room 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/9/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/512012 Photos None.D-60 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 44, FH El 401 Adjacent to trackway Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment.

5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-61 Byron Generating Station Unit 1 12Q0108,20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 44, FH El 401 Adjacent to trackway 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Cabinets orientated correctly to avoid impacting instruments with wheels chocked 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Water in trackway identified by NRC. Site FME Coordinator contacted and it was determined that this was not an issue. IR 1399113 Yes Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/9/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-62 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 45, RSH El 702, A & B Pump Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Numerous partially open S-hooks identified.

It is unlikely that the lights would become disengaged since the hooks are only partially open and not all hooks are open and the lights are not directly over the equipment -judged acceptable.

IR 1399104 written to inspect and close S-hooks.5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-63 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 45, RSH El 702, A & B Pump Room 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/9/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-64 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 46, RSH El 702, Diesel Oil Storage Tank Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

Only one component in room 2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?

3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes.that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-65 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 46, RSH El 702, Diesel Oil Storage Tank Room 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-66 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 47, Aux El 364 Unit 1 (open area)Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Adjacent valves have adequate clearance:

2AFOO5F to 2AFOO5H 2" clearance, 2AFOO5F to Unistrut 1 1/4" -valves are supported with lateral movement limited and therefore are acceptable

5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-67 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-1 2-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 47, Aux El 364 Unit 1 (open area)8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/10/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-68 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 50, Aux El 346, Unit 1 near 1AP38E Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-69 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 50, Aux El 346, Unit 1 near 1AP38E 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Scaffolding adequately braced, connected floor and ceiling in accordance with Exelon Scaffolding Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/10/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-70 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status:.I N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 52, Aux El 330, B SX Pump Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-71 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 52, Aux El 330, B SX Pump Room 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Ladders stored on sides and not near equipment in accordance with Byron Seismic Housekeeping Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team M. Delaney & P. Gazda 8110112 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-72 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. I Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 53, Aux El 426 near Q-12, S-13 Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-73 Byron Generating Station Unit 1 S12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 53, Aux El 426 near Q-12, S-13 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Numerous scaffolds in area. Scaffold at Col Q 11 is braced and tied off so it would not impact adjacent valves. Scaffold at Col S13 is very large and close to non-safety panels. Discussed with Ops and scaffold constructor and is acceptable

-in accordance with Exelon Scaffolding Procedure Extra handrails are tied off and secured, and ladders in ladder storage area in accordance with Byron Seismic Housekeeping Procedure 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/20/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-74 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 54, Aux El 414, Elec Penetration Area Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets).?

Yes 2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

Yes 3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Yes 4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Yes 5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?Yes 6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?Yes D-75 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 54, Aux El 414, Elec Penetration Area 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Scaffolding near 1RYO1EA is well-constructed, tied off in accordance with Exelon Scaffolding Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/20/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-76 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 57, Aux El 383 (work with AWC 59)Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets)?

Yes 2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

Yes 3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Yes 4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Yes 5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?Yes 6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?Yes D-77 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 57, Aux El 383 (work with AWC 59)7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Scaffold parts stored in storage area, construction equipment is well-secured, extra handrails are tied off, and extra Breaker moved to be 12" from bus -all in accordance with Byron Seismic Housekeeping Procedure Permanent scaffold is well-constructed and tied off in accordance with Exelon Scaffolding Procedure 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/20/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-78 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 58, Aux El 383 1 B Aux Feed Pump Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?Fuel level indicator for 1AFOIPB: 1Li-AF8000 is well-supported and protected, Day Tank Level Sight Glass: ILI-DO032 is well-supported and protected

-no structural/seismic issues 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-79 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 58, Aux El 383 1B Aux Feed Pump Room 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/20/12 am Includes adjacent room for 1 DO1 OT Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-80 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. I Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 59, Aux El 383 (See AWC 57)Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets)?

Yes 2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

Yes 3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Yes Yes Yes 5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Yes Yes D-81 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 59, Aux El 383 (See AWC 57)8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/20/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-82 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 61, Aux El 364 U1 and U2 open area Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment 5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-83 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: Y N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 61, Aux El 364 U1 and U2 open area 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Construction equipment is staged away from components and ladder chained in accordance with Byron Seismic Housekeeping Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/20/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-84 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 62, Aux El 364, Centrifugal Charging Pump 1A Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment 5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-85 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 62, Aux El 364, Centrifugal Charging Pump 1A 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/20/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-86 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 64, Aux El 364 1B RH HX Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment 5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-87 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 64, Aux El 364 1 B RH HX Room 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Scaffolding tied off and not close to equipment in accordance with Exelon Scaffolding Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/20/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 62 -/Philip Gazda 10/5/2012 Photos None.D-88 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 64a, Aux El 364 MCR Chillers Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment 5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-89 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 64a, Aux El 364 MCR Chillers 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/20/12 pm Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-90 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet I of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 66, Aux El 1 B RH Pump Room Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Masonry walls are seismic and would not collapse on equipment 5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

D-91 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by 66, Aux El 1 B RH Pump Room 8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Comments Seismic Walkdown Team M. Delaney & P. Gazda 8/21/12 am Evaluated by: Marlene Delaney Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-92 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by Outage-1 -Cont -EL 426 -near 1 RY32MA Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?Bagged material for outage judged to be acceptable in accordance with the Byron Seismic Housekeeping Procedure D-93 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by Outage-1 -Cont -EL 426 -near 1RY32MA 7. Does it appear that the area is free of potentially adverse seismic interactions.

Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Scaffolds adequately restrained and scaffold material adequately stored in accordance with Exelon Scaffolding Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: .James Griffith Date: 10/5/2012 Philip' Gazda 10/5/2012 Photos None.D-94 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by Outage-2 -Cont -EL 451 -near 1 RY455A Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

Auxiliary steel members for pipe supports associated with the pipe containing valve 1RY455A are in contact with/close to the valve. All items are adequately-restrained and move together.

Judged to be acceptable.

5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-95 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by Outage-2 -Cont -EL 451 -near 1RY455A 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Scaffolds adequately restrained in accordance with Exelon Scaffolding Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: James Griffith Date: 1015/2012 Philip Gazda 10/5/2012 Photos None.D-96 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by Outage-3 -Cont -EL 412 -near 1 LT-0518 Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Lead shielding on pipes is adequately restrained in accordance with Byron Seismic Housekeeping Procedure.
4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?Welded drain line is well-supported and judged to be acceptable.
6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-97 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by Outage-3 -Cont -EL 412 -near 1 LT-0518 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Tables with outage equipment are near robust items and are judged to be acceptable per Byron Seismic Housekeeping Procedure.

8. Have you looked for and found no other seismic conditions that could Yes adversely affect the safety functions of the equipment in the area?Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: A James Griffith Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-98 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by Outage-4 -Cont -EL 377 -near 1 RH8702A Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Gauges are near pipe. Pipe is adequately restrained in 3 directions.

Interaction during a seismic event judged to not be credible.4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?

5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-99 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by Outage-4 -Cont -EL 377 -near 1 RH8702A 7. Does it appear that the area is free of potentially adverse seismic interactions associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Scaffolds are adequately restrained in accordance with Exelon Scaffolding Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Yes Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: James Griffith Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-100 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. I Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Area Walk-by Outage-5 -Cont -EL 377 -near 1VP01AA (inside Location (Bldg, Elev, Room/Area):

Plenum)Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to recordthe results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-101 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: FY] N U Area Walk-By Checklist (AWC)Area Walk-by Outage-5 -Cont -EL 377 -near 1VP01AA (inside Location (Bldg, Elev, Room/Area):

Plenum)7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

.Outage material (ladders, etc.) is adequately stored in accordance with Byron Seismic Housekeeping Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: James Griffith Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-102 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: M N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by Outage-6 -Cont -EL 377 -near 1 LT-0459 Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially Yes adverse seismic conditions (if visible without necessarily opening cabinets)?

2. Does anchorage of equipment in the area appear to be free of significant Yes degraded conditions?
3. Based on a visual inspection from the floor, do the cable/conduit raceways and Yes HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Auxiliary support steel located near insulated pipe. Insulation is flexible so it is not likely that the impact from the auxiliary support steel during a seismic event would damage the pipe. Judged to be acceptable.
4. Does it appear that the area is free of potentially adverse seismic spatial Yes interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause flooding or spray in the area?6. Does it appear that the area is free of potentially adverse seismic interactions Yes that could cause a fire in the area?D-103 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: Mf N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by Outage-6 -Cont -EL 377 -near 1 LT-0459 7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Scaffold and lead shielding are adequately restrained in accordance with Exelon Scaffolding Procedure and Byron Seismic Housekeeping Procedure respectively.

8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: James Griffith Date: 10/5/2012 Philip Gazda 10/5/2012 Photos None.D-104 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 1 of 2 Status: MZ N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by Outage-7 -Cont -EL 390 -near 1TE-RC022A Instructions for Completing Checklist This checklist may be used to document the results of the Area Walk-By near one or more SWEL items. The space below each of the following questions may be used to record the results of judgments and findings.Additional space is provided at the end of this checklist for documenting other comments.1. Does anchorage of equipment in the area appear to be free of potentially adverse seismic conditions (if visible without necessarily opening cabinets)?

Yes 2. Does anchorage of equipment in the area appear to be free of significant degraded conditions?

3. Based on a visual inspection from the floor, do the cable/conduit raceways and HVAC ducting appear to be free of potentially adverse seismic conditions (e.g., condition of supports is adequate and fill conditions of cable trays appear to be inside acceptable limits)?Yes Yes Yes 4. Does it appear that the area is free of potentially adverse seismic spatial interactions with other equipment in the area (e.g., ceiling tiles and lighting)?
5. Does it appear that the area is free of potentially adverse seismic interactions that could cause flooding or spray in the area?Yes 6. Does it appear that the area is free of potentially adverse seismic interactions that could cause a fire in the area?Yes D-105 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 2 Status: Y N U Area Walk-By Checklist (AWC)Location (Bldg, Elev, Room/Area):

Area Walk-by Outage-7 -Cont -EL 390 -near 1TE-RC022A

7. Does it appear that the area is free of potentially adverse seismic interactions Yes associated with housekeeping practices, storage of portable equipment, and temporary installations (e.g., scaffolding, lead shielding)?

Scaffolds are adequately restrained in accordance with Exelon Scaffolding Procedure 8. Have you looked for and found no other seismic conditions that could adversely affect the safety functions of the equipment in the area?Yes Comments Seismic Walkdown Team: P. Gazda & J. Griffith -9/19/2012 Evaluated by: James Griffith Date: 10/5/2012'° --Philip Gazda 10/5/2012 Photos None, D-106 Byron Generating Station Unit 1 12QO108.20-R-O01 Rev. 1 Correspondence No.: RS-12-161 EPlan for Future Seismic Walkdown of Inaccessible Equipment Certain cabinets require supplemental internal inspection for other adverse seismic conditions as summarized in Table E-2. Supplemental internal inspections of these cabinets are required due to clarifications provided by the NRC after the online seismic walkdowns were completed.

These supplemental inspections will be completed during a unit outage or time when the equipment is accessible, as appropriate.

E-1 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Table E-1 not used.E-2 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Table E-2. Deferred Internal Cabinet Inspection IF NOT TRACKING STATUS/COMPONENT DESCRIPTION EQUIPMENT ACCESSIBLE MILESTONE NUMBER INSPECTION ID CLASS (Y/N) ACCESSIBLE, COMPLETION (IR No.) RESULTS WHY? (IRNo._RESULT 480V AUX BLDG 1AP21E ESF MCC 131X1 (01) Motor Control YES Spring 2013 1425389 XFORMER 480V AUX BLDG 1AP22E ESF MCC 131X3 (01) Motor Control YES Spring 2013 1425389 ASMBLYCenters ASMVBLY EQ 480 V AUX 1AP24E BLDG ESF MCC (01) Motor Control YES Spring 2013 1425389 132X3 ASMBLY ASSY -480V AUX 1AP25E BLDG ESF MCC (01) Motor Control YES Spring 2013 1425389 131X2Centers 131X2 EQ 480V AUX 1AP27E BLDG MCC 132X2 (01) Motor Control YES Spring 2013 1425389 ASMIBLY Centers 1AP38E ASSY -480V AUX (01) Motor ControlYESpig211458 ABLDGY Centers ASSY -480V 1AP38E BLCT MCC (01) Motor Control SOUTH ELEC RM Centers Spring 2013 1425389 ASSY -480V 1AP93E SXCT MCC 132Z1, (01) Motor Control YES Spring 2013 1425389 NORTH ELEC RM Centers ASSY -480V ESF 1AP98E SXCT UNIT (01) Motor Control YES Spring 2013 1425389 SUBSTA 132Z, Centers SOUTH ELEC RM Table E-2 Page 1 of 7 E-3 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 COMPONENT EQUIPMENT ACCESSIBLE IF NOT MILESTONE TRACKING STATUSI ID DESCRIPTION CLASS (Y/N) ACCESSIBLE, NUMBER INSPECTION WHY?CCOMPLETION (IR No.) RESULTS ASSY -480V ESF 1AP99E SXCT UNIT (01) Motor Control YES Spring 2013 1425389 SUBSTA 131Z, Centers NORTH ELEC RM Completed No adverse 1AP12E ASSY -480V ESF (02) Low Voltage YES during Bus N/A seismic SWGR 132X Switchgear Outage in B1R18 conditions Completed No adverse 1AP06E 4160 VOLT ESF (03) Medium YES during Bus N/A seismic SWITCH BUS 142 Voltage Switchgear Outage in B1R18 conditions EQ 480V ESF UNIT SUB 131X See Note 1 lAP11E TRANSFORMER (04) Transformers NO below.1AP086 480V ESF UNIT Completed No adverse 1AP13E SUBSTA 132X (04) Transformers YES during Bus seismic XFMR Outage in B1R18 conditions 1 DCI 0J 125V DC FUSE (14) Distribution YES Rear Panel is Spring 2013 1425391 PANEL -DIV. 11 Panels Not Removable lDC11J 125V DC FUSE (14) Distribution YES Rear Panel is Spring 2013 1425391 PANEL- DIV. 12 Panels Not Removable Table E-2 Page 2 of 7 E-4 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 COMPONENT EQUIPMENT ACCESSIBLE IF NOT MILESTONE TRACKING STATUS/ID DESCRIPTION CLASS (Y/N) ACCESSIBLE, COMPLETION NUMBER INSPECTION WHY? (IR No.) RESULTS From Front only (16) Battery rear panel lDC04E 125V DC BATT Chargers and YES bolted on, Spring 2013 1425391 CHGR 112 Inverters requires I nverters extensive disassembly.

From Front only INVERTER INST (16) Battery rear panel 1IP05E BUS 111 1-3371 Chargers and YES bolted on, Spring 2013 1425391 AB1 Inverters requires extensive disassembly.

From Front only INVERTER INST (16) Battery rear panel IIP07E BUS 113 1-3371 Chargers and YES bolted on, Spring 2013 1425391 ABI Inverters requires extensive disassembly.

From Front only INVERTER INST (16) Battery rear panel 1IP08E BUS 114 1-3371 Chargers and YES bolted on, Spring 2013 1425391 AB1 Inverters requires extensive disassembly.

CONT RM HVAC (20)Instrumentation OVC01JA LOCAL CONT and Control Panels YES Spring 2013 1425391 PAN ASMBLY and Cabinets and Cabinets Table E-2 Page 3 of 7 E-5 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 COMPONENT EQUIPMENT ACCESSIBLE IF NOT MILESTONE TRACKING STATUS ID DESCRIPTION CLASS (Y/N) ACCESSIBLE, COMPLETION NUMBER INSPECTION WHY? (IR No.) RESULTS (20)OVCl5J MCR U-1 HVAC Instrumentation YES Spring 2013 1425391 START PNL and Control Panels and Cabinets U-1 PROC I&C (20)Instrumentation 1PA01J RACK PROTECT and Control Panels YES Spring 2013 1425391 CH 1 CAB 1 adCnrlPnl and Cabinets U-1 PROC I&C (20)Instrumentation 1PA02J RACK PROTECT and Control Panels YES Spring 2013 1425391 CH 2 CAB 2 adCnrlPnl and Cabinets U-1 PROC I&C (20)Instrumentation 1PA03J RACK PROTECT and Control Panels YES Spring 2013 1425391 CH 3 CAB 3 adCnrlPnl and Cabinets U-1 PROC I&C (20)Instrumentation 1PA04J RACK PROTECT and Control Panels YES Spring 2013 1425391 CH 4 CAB 4 adCnrlPnl and Cabinets U-1 PROC I&C (20)Instrumentation 1PA06J RACK CONT GRP and Control Panels YES Spring 2013 1425391 2 CAB 6 and Cabinets and Cabinets Table E-2 Page 4 of 7 E-6 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 COMPONENT EQUIPMENT ACCESSIBLE IF NOT MILESTONE TRACKING STATUSI ID DESCRIPTION CLASS (Y/N) ACCESSIBLE, COMPLETION NUMBER INSPECTION WHY? (IR No.) RESULTS PROC I&C RACK (20)1PA07J CONT GRP 3 CAB Instrumentation YES Spring 2013 1425391 7 Cand Control Panels and Cabinets (20)U-1 PROC I&C Instrumentation 1PA08J RACK and Control Panels YES Spring 2013 1425391 and Cabinets CAB PROT SYST (20)SOL ST RX/ESF Instrumentation 1PA09J TRN A 0-3371B and Control Panels YES Spring 2013 1425391 AB1 and Cabinets CAB PROT SYST (20)SOL ST RX/ESF Instrumentation 1PA10J TRN B 0-3371B and Control Panels YES Spring 2013 1425391 AB1 and Cabinets CAB TEST (20)1PA12J SAFEGUARD TRN Instrumentation YES Spring 2013 1425391 Band Control Panels and Cabinets CAB ESF (20)1 PA14J SEQ/ACT TRN B Instrumentation YES Spring 2013 1425391 0-3371 BEAC B1 and Control Panels and Cabinets Table E-2 Page 5 of 7 E-7 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 EQUIPMENT ACCESSIBLE IF NOT MILESTONE TRACKING STATUS COMPONENT DESCRIPTION E(YIN) ACCESSIBLE, COMPLETION NUMBER INSPECTION WHY? (IR No.) RESULTS CAB RELAY AUX (20)Instrumentation 1PA27J SAFEGUARD TRN and Control Panels YES Spring 2013 1425391 A 0-3371 B AB1 and Cabinets CAB RELAY AUX (20)Instrumentation 1PA28J SAFEGUARD TRN and Control Panels YES Spring 2013 1425391 B 0-3371 B AB1 and Cabinets and Cabinets CAB CONT (20)Instrumentation 1PA33J SYSTEM ESF 11 and Control Panels YES Spring 2013 1425391 0-3371 B AB1 and Cabinets and Cabinets CAB CONT (20)Instrumentation 1PA34J SYSTEM ESF 12 and Control Panels YES Spring 2013 1425391 0-3371 B AB1 and Cabinets and Cabinets CAB HJTC RX (20)Instrumentation 1PA51J VESSEL LEVEL and Control Panels YES Spring 2013 1425391 CH A 0-3371 B AB1 and Cabinets and Cabinets CAB HJTC RX (20)Instrumentation 1PA52J VESSEL LEVEL and Control Panels YES Spring 2013 1425391 CH B 0-3371 B AB1 and Cabinets and Cabinets Table E-2 Page 6 of 7 E-8 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 IF NOT TRACKING STATUS I COMPONENT DESCRIPTION EQUIPMENT ACCESSIBLE MILESTONE NUMBER STION ID DSRPINCLASS (Y/N) ACCESSIBLE, COMPLETION NUMBER INSPECTION WHY? (IR No.) RESULTS (20)1B DG CONTROL Instrumentation 1PL08J PANEL and Control Panels YES Spring 2013 1425391 and Cabinets (20) NO OTHER MAIN CONTROL Instrumentation ADVERSE BOARD and Control Panels SEISMIC and Cabinets CONDITIONS (20) Completed No adverse REACTOR TRIP Instrumentation YES duringN/A seismic 1RD05E SWITCHGEAR and Control Panels Y Refueling conditions and Cabinets Outage CENTRIFUGAL (20)CHARGING Instrumentation 1VA11J PCUBICLE and Control Panels YES Spring 2013 1425391 COOLER LOCAL and Cont s CONTROL PANEL ESF SWGR RM (20)DIV 12 HVAC Instrumentation lIVX07J DMPR START and Control Panels YES Spring 2013 1425391 PNL and Cabinets SPENT FUEL PIT HS-FC1 Box on (18) Instrument YES Spring 2013 1425391 wallRak Note 1 -Unit Sub-Station Transformer panel anchorages are external welds, and Instrument Power CVTs are externally bolted to the floor. As such only an external inspection was performed during the Seismic Walk Down. For each component type internal inspection requires removal of bolted covers. The transformers do not have hinged doors or panel covers with handles, latches or thumb screws that provide access to view the internal assembly.

Extensive disassembly is required to perform an internal inspection.

After reviewing the FAQ 4.20 Rev. 2 dated September 25, 2012 on this question Byron will not perform internal inspection of Unit Sub-Station Transformers or Instrument Power CVTs.Table E-2 Page 7 of 7 E-9 Byron Generating Station Unit 1 12QO108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 F Peer Review Report This appendix includes the Peer Review Team's report, including the signed Peer Review Checklist for SWEL from Appendix F of the EPRI guidance document. (Ref. 1)F-1 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Peer Review Report For Near Term Task Force (NTTF) Recommendation

2.3 Seismic

Walkdown Inspection of Byron Nuclear Station Unit 1 October 15, 2012 Prepared by Peer Reviewers Walter Diordievic (Team Leader)Todd A. Bacon Tribhawan K. Ram Walter Djordjevic k- yr 10/15/2012 Peer Review Team Leader Certification Signature Date F-2 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 2 of 15 I Introduction This report documents the independent peer review for the Near Term Task Force (NTTF)Recommendation

2.3 Seismic

Walkdowns performed by Stevenson

& Associates (S&A) for Unit I of Byron Nuclear Station (Byron). The peer review addresses the following activities: " Review of the selection of the structures, systems, and components, (SSCs) that are included in the Seismic Walkdown Equipment List (SWEL)" Observation of seismic walkdown on August 6, 2012 by Peer Review Team Leader, Mr.Walter Djordjevic" Review of a sample of the checklists prepared for the Seismic Walkdowns

& Walk-Bys" Review of any licensing basis evaluations" Review of the decisions for entering the potentially adverse conditions in to the plant's Corrective Action Plan (CAP)" Review of the final submittal report The peer reviewers for Byron, Unit 1, are Messrs. Walter Djordjevic, Todd A. Bacon, and Tribhawan K. Ram, all of S&A. Mr. Djordjevic is designated the Peer Review Team Leader and has participated in all aspects of the peer review. None of the aforementioned engineers is involved in the seismic walkdown inspection process so that they can maintain their independence from the project. Mr. Djordjevic is an advanced degree structural engineer, has over thirty years of nuclear seismic experience and has received Seismic Capability Engineer (EPRI SQUG training), EPRI IPEEE Add-on, Seismic Fragility and Seismic Walkdown Engineer (SWE) training.

Mr. Bacon is a civil-structural engineer with 25 years of nuclear engineering experience and received the Seismic Walkdown Engineer (SWE) training.Mr. Ram is an advanced degree nuclear engineer with over 25 years of nuclear power plant experience.

Mr. Djordjevic led the seismic peer review activities and Mr. Ram led the SWEL selection peer review. Mr. Djordjevic, as Peer Review Team Leader, has participated in all phases of the peer review process for Byron, Unit 1.The SWEL development was performed by Mr. Kim L. Hull of S&A. No findings were cited.The SWEL peer review process and observations by the peer reviewers are found in Section 2.The completed SWEL Peer Review Checklist is found in Attachment 2.The peer review of the seismic walkdown inspection started on August 6, 2012 with a peer review of the actual walkdowns for both Units 1 and 2. Mr. Djordjevic joined the walkdown team for a portion of the day's planned walkdowns to observe the conduct of walkdowns and adherence to the Seismic Walkdown Guidance (SWG)1.The SWE walkdown inspection team engineers were Mr. Philip A. Gazda and Ms. Marlene M. Delaney for both units. An interview was conducted by Messrs. W. Djordjevic and T. Bacon with the SWE inspection team on September 7, 2012 after review of a sample of the Unit 1 Seismic Walkdown Checklists (SWC)Seismic Walkdown Guidance For Resolution of Fukushima Near-Term Task Force Recommendation 2.3: Seismic, EPRI Report 1025286, June 2012.F-3 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 3 of 15 and Area Walk-By Checklists (AWCs) to ascertain the quality and procedural compliance with the SWG. The discussion of the sample SWCs and AWCs is provided in Section 3.No issues were identified which challenged the current licensing basis.F-4 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 4 of 15 2 Peer Review -Selection of SSCs 2.1 Purpose The purpose of this section is to describe the process that was used to perform the peer review of the selected structures, systems, and components, (SSCs) that were included in the Seismic Walkdown Equipment List (SWEL).This section documents the Peer Review -Selection of SSCs performed for Byron Unit 1 2.2 Peer Review Activity -Selection of SSCs The guidance in EPRI Technical Report 1025286, Seismic Walkdown Guidance for Resolution of Fukushima Near-Term Task Force Recommendation 2.3: Seismic, dated June 2012 {SWG}, Section 3: Selection of SSCs was used as the basis for this review.This peer review was based on reviews of the following documents:

1) UFSAR chapters 3, 5, 6, 7, 8, and 9 2) Success Path Equipment List (SPEL)3) P&ID M-63 for Spent Fuel Pool Cooling System This peer review was based on interviews with the following individual(s) who was (were)directly responsible for development of the SWEL: Mr. Kim L. Hull, Senior Mechanical Engineer This peer review.utilized the checklist shown in the SWG, Appendix F: Checklist for Peer Review of SSC Selection.

For SWEL 1 development, the following actions were completed in the peer review process:* Verification that the SSCs selected represented a diverse sample of the equipment required to perform the following five safety functions:

o Reactor Reactivity Control (RRC)o Reactor Coolant Pressure Control (RCPC)o Reactor Coolant Inventory Control (RCIC)o Decay Heat Removal (DHR)o Containment Function (CF)This peer review determined that the SSCs selected for the seismic walkdowns represent a diverse sample of equipment required to perform the five safety functions.

This conclusion was based on a review of UFSAR chapters 3, 5, 6, 7, 8, and 9 which F-5 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 5 of 15 determined that all five safety functions (RRC, RCPC, RCIC, DHR, and CF) are adequately represented.

Verification that the SSCs selected include an appropriate representation of items having the following sample selection attributes:

o Various types of systems o Major new and replacement equipment o Various types of equipment o Various environments o Equipment enhanced based on the findings of the IPEEE o Risk insight consideration This peer review determined that the SSCs selected for the seismic walkdowns include a sample of items that represent each attribute/consideration identified above. The justification for this conclusion is: a) Based on a review of UFSAR chapters referenced above and the SPEL list, it was determined that appropriate variety of equipment and systems are represented (e.g., EDG, Component Cooling, Aux Feed, Charging, Essential Service WTR, RHR, Batteries, Battery Chargers, Low and Med Vol Switchgear and MCCs); b) The "New or Replace" equipment are indicated as such; c) A variety of location environments are included:

e.g., MCCs (Auxiliary

@ EL: 346, and ESWCT @EL: 874), Pumps (Auxiliary

@ EL: 330, 346, 364, and 383), Tanks and Heat Exchangers (Auxiliary and Containment), Air Handlers (Auxiliary and Containment) and Valves (Auxiliary and Containment);

d) The IPEEE Enhancement related equipement is indicated as such; and e) The risk quantification has been included in the "Comments" column.For SWEL 2 development, the following actions were completed in the peer review process:* Verification that SFP related items were considered and appropriately added to SWEL 2.This peer review determined that spent fuel pool cooling system Seismic CAT 1 items were given appropriate consideration and included on the list. This determination is based on a review of the licensing and design basis documents including FSAR chapters 3 and 9 and SFP Cooling System P&ID M-63." Verification that appropriate justification was documented for spent fuel pool related items that were not added to the SWEL 2.This peer review determined that an appropriate level of justification was documented for those items related to the spent fuel pool that were not added to SWEL 2. The justification for not including any Seismic Category I Structure has appropriately been documented in the interim report. There are no rapid drain down related components in SWEL2. Appropriate justification for this item is included in the interim report as well.2.3 Peer Review Findings -Selection of SSCs This peer review found that the process for selecting SSCs that were added to the SWEL was consistent with the process outlined in the SWG Section 3: Selection of SSCs.F-6 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 6 of 15 The peer review checklist is attached to this document.This peer review resulted in no additional findings.2.4 Resolution of Peer Review Comments -Selection of SSCs All comments requiring resolution were incorporated prior to completion of this peer review.2.5 Conclusion of Peer Review -Selection of SSCs This peer review concludes that the process for selecting SSCs to be included on the seismic walkdown equipment list appropriately followed the process outlined in the SWG, Section 3: Selection of SSCs. It is further concluded that the SWEL sufficiently represents a broad population of plant Seismic Category 1 equipment and systems to meet the objectives of the.NRC 50.54(f) Letter.F-7 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 7 of 15 3Review of Sample Checklists

& Area Walk-bys A peer review of the SWCs and AWCs was performed on September 7, 2012 after which an interview was conducted by Messrs. Djordjevic and Bacon with the SWE inspection team in accordance with the SWG requirements.

The SWE trained walkdown engineers were Mr. Philip A. Gazda and Ms. Marlene M. Delaney, both of whom are SQUG trained seismic capability engineers (EPRI 5-day training course) and Seismic Walkdown Engineer (SWE) trained.Table 3-1 lists the SWCs and AWCs samples which represent 17% of the SWC and 20% of the AWC. The sample includes the equipment inspected during the peer review and other equipment items from other classes to introduce diversity to the sampling procedure.

Table 3-1. Table of SWC and A WC Samples from Seismic Walkdown Inspection for Unit ]Equipment Identification Equipment Walkdown Item SWE Noted Observations (GIP) Class Inverter Bus 111 lIPO5E 16 1-3371 ABi No concerns Div 12 MEER 1VE05C 9 Exhaust Fan No concerns SG 1B PORV IMSO18B 8 Assembly No concerns RHR HX 1B Flow IRH607 7 Control Valve No concerns Diesel driven SX OSXO2PB 6 Make-up Pump No concerns Main Control External welded anchorage lPMO5J 20 Board covered by carpeting 1B AFW SX 1AFO17B 8 Suction Valve No concerns Train B Makeup Air Filter Unit OVC08Y 10 Fan OB No concerns 480V ESF 131Z IAP99E 1 MCC No concerns Containment 1RY8028 8 Isolation Valve No concerns 1SXO1PB 5 ESW Pump No concerns CC Heat ISX005 8 Exchanger Inlet No concerns F-8 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 8 of 15 Equipment Identification Equipment Walkdown Item SWE Noted Observations (GIP) Class Valve SX Supply Valve for DD AFW 1SX173 8 Pump No concerns Charging Pump Injection 1SI8801B 7 Isolation Valve No concerns Charging Line D/P Cell Flow 1FT-0121 18 Transmitter No concerns SG Loop 1A Steam Pressure 1PT-0516 18 Transmitter No concerns Cove molding covers external 1PA08J 20 PROC I&C Rack anchorage ESF 11 0-3371B cove molding covers external 1PA33J 20 ABI Cabinet anchorage Charging Pump Cubicle Cooler Local Control 1VA11J 20 Panel no concerns RH Pump 1B Seal 1RH01PB-A 21 Cooler no concerns 1AP25E 480V Auxiliary Repaired since IPEEE- outlier Bldg ESF MCC IPEEE as it was originally not 1 131X2 bolted to adjacent MCC Area Walkdown Observations Description AW8 Open s-hooks were found AW60 No concerns AW52 B SX pump room Ladders well secured Outside HX & spent fuel pump room Checked valve clamp bolting -OK AW36 -Area 5 near MCC No concerns 4KV Div 11 Room Open s-hooks were found MEER Div 1 (AW28) No concerns -identified well supported drain line 1B Diesel Oil Storage Tank No concerns F-9 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 9 of 15 Equipment Identification Equipment Walkdown Item SWE Noted Observations (GIP) Class Room SX Cooling El. 377 ft Open s-hooks were found F-1 0 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 10 of 15 There were no findings that remotely challenged the licensing basis. The plant was found to have just a few minor housekeeping (and not particularly seismic housekeeping) and maintenance (concerning loose screws and fasteners) issues. Tables 5-2 and 5-3 of the Seismic Walkdown Report (final submittal report) provide the lists of the issues encountered for the equipment seismic walkdowns and area walk-bys.The scaffolding and seismic housekeeping procedures were reviewed by the SWEs in order to gain a full understanding of the plant practices in regard to those procedures.

There were no seismic concerns noted in Unit 1 with regard to scaffold erection or seismic housekeeping.

The very few instances of loose screws/fasteners and simple (non-seismic) general maintenance issues were of no concern from the seismic performance viewpoint.

There were instances of partially open s-hooks on light fixtures but those instances were isolated and not "clustered" around a single fixture. As such, they were not adjudged as immediate seismic interaction hazards to the equipment in their general proximity.

The instances where they were found were documented and action requests (IR) were written (see Table 5-2 and 5-3 in submittal report). In addition, a general action request was written (IR# 1399405) to inspect for and close s-hooks wherever they are located in the plant. In conclusion, procedural compliance is excellent at this plant.Finally, electrical panels at Byron 1 are generally intermittently (stitch) welded to an embedded plate in the concrete floor. As indicated in Table 3-1 (see 1PA08J and 1PA33J) the stitch welding is generally not visible as it is covered with cove molding. This is the situation throughout the, auxiliary electric equipment room. The welding is evident by virtue of the raised profile projected through the plastic molding. The SWE inspectors were able to visually observe the welding in a few locations where the molding had been removed or was missing. They concluded that the welding indicated on the installation drawings is accurate and accepted the drawings as correct. The affected panels are: 1PAO1J -1PA12J, 1PA14J, 1PA28J, 1PA33J, 1PA34J, 1PA51J, and 1PA52J. The peer reviewers concur with their conclusions.

F-11 Byron Generating Station Unit 1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Sheet 11 of 15 4 Review of Licensing Basis Evaluations Tables 5-2 and 5-3 provide a list of the issues encountered during the Unit 1 seismic walkdown inspections for the SWEL components and how they were addressed.

If a Byron IR request was generated it is shown in the Table. An interview was conducted by Messrs. Djordjevic and Bacon with the SWE inspection team on September 7, 2012 to discuss the issues identified.

No potentially adverse seismic conditions were identified that resulted in a seismic licensing basis evaluation and the peer reviewers concur with this outcome.F-12 12Q0108.20-R-001 Rev. I Correspondence No.: RS-1 2-161 Sheet 12 of 15 5 Review Final Submittal Report & Sign-off The final submittal report has been reviewed by Messrs. W. Djordjevic, T. A. Bacon and T. K.Ram and found to meet the requirements of the EPRI 1025286 -Seismic Walkdown Guidance (SWG).F-1 3 12Q0108.20-R-001 Rev. I Correspondence No.: RS-12-161 Sheet 13 of 15 Attachment 1: Peer Review Checklist for SWEL Byron Unit I Peer Review Checklist for SWEL Instructions for Completing Checklist This peer review checklist may be used to document the review of the Seismic Walkdown Equipment List (SWEL) in accordance with Section 6. The space below each question in this checklist should be used to describe any findings identified during the peer review process and how the SWEL may have changed to address those fimdings.

Additional space is provided at the end of this checklist for documenting other comments.1. Were the five safety functions adequately represented in the SWEL 1 selection?

YO NEl Appropriate equipment has been included to maintain the five safety functions:

RPC, DHR, RCIC, RCPC, and CF 2. Does SWEL I include an appropriate representation of items having the following sample selection attributes:

a. Various types of systems? YO No Various system types (e.g., EDG, Component Cooling, Aux Feed, Charging, Essential Service WTR, RHR, Batteries, Battery Chargers, Low and Med Vol Switchgear and MCCs) have been included.b. Major new and replacement equipment?

YO NEI"New or Replace" equipment is included in the list.c. Various types of equipment?

YO NEI The equipment represents all required 21 types except 12 and 13. The screenings

  1. 1, #2, and #3 resulted in no equipment in the latter two categories.
d. Various environments?

Y[@ NEI Appropriate environments (e. g., Auxiliary and Containment buildings) have been included.F-14

-- ---.......-

C .. .. ... .12QO108.20-R-O01 Rev. 1 Correspondence No.: RS-12-161 Sheet 14 of 15 Byron Unit I Peer Review Checklist for SWEL e. Equipment enhanced based on the findings of the IPEEE (or equivalent)

YED NE program?Included as indicated in the column, "IPEEE Enhancement." f. Were risk insights considered in the development of SWEL 1? YED N[Risk qualtifications (F-V and RAW) provided in the "Comments" column 3. For SWEL 2: a. Were spent fuel pool related items considered, and if applicable included in YO NE SWEL 2?Spent fuel pool cooling system Seismic CAT I items were given appropriate consideration and included on the list.b. Was an appropriate justification documented for spent fuel pool related items YO NE not included in SWEL 2?There are no rapid drain down related components in SWEL2. Appropriate justification for this item is included in the Interim Report. Justification has also been provided for not including Seismic I structures such as SFP sluiceAransfer gates.4. Provide any other comments related to the peer review of the SWELs.None 5. Have all peer review comments been adequately addressed in the final SWEL? YO NE F-1 5 12QO108.20-R-O01 Rev. 1 Correspondence No.: RS-12-161 Sheet 15 of 15 Peer Reviewer#1: Peer Reviewer#2:--1 rj< -TK Ram (Bvron 1)Date: 8/21/12 Walter Dliordievic Date: 9/1/12 Walter Dinrdipvic F-16 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 G IPEEE Vulnerability Status Table G-1 lists the plant improvements, the IPEEE/SQUG proposed resolution, the actual resolution and resolution date.G-1 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Table G-1. IPEEE Vulnerability Status Description of Condition

/ IPEEE Report Resolution Equipment ID Vulnerability*

Proposed Resolution Actual Resolution of Condition Date of Condition**

2FT-AF01 1 Flow transmitters adjacent to N/A Tank has been shown to maintain its 12/23/1996***

2FT-AF012 Recycle Monitor tanks integrity well beyond RLE demand level 2FT-AF013 (1&2AB02T) which are by CDFM capacity.2FT-AF014 unanchored; thus they pose 2FT-AFO015 a potential flooding hazard to 2FT-AF016 the transmitters on the 2FT-AF017 adjacent nearby instrument 2FT-AF018 rack.Flow Transmitters 1AP21 E Seismic interaction concern. N/A Trash barrel removed. 12/23/1996****

Motor Control Adjacent trash barrel Center (unanchored) may impact MCC during seismic event.1CV112E Operator is in contact with Evaluate clearance Evaluations have determined that the 8/26/1998 2CV1 12E adjacent pipe/grating which requirements and affected piping systems and valve are Valves poses an impact hazard. effect on valve and adequate with the reduced clearance.

pipe system Also, for 2CV1 12E the grating has been modified.6/11/1997 OCC01 E Seismic interaction concems N/A Flammable cabinet removed from 12/23/1996****

Switchgear with an adjacent flammables immediate area and railings restrained storage cabinet and to preclude potential impact.personnel safety railing lay-down (storage) area.Table G-1 Page 1 of 7 G-2 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Description of Condition

/ IPEEE Report Resolution Equipment ID Vulnerability*

Proposed Resolution RDate of Condition**

Actual Resolution of Condition 1CV8152 Associated limit switch in N/A Grating has been modified.

6/11/1997 Valve direct contact with adjacent platform grating. Remainder of valve only has 1/8 inches of clearing.1AP25E Seismic interaction concern. N/A Interactions were be evaluated on a 4/22/2004 2AP25E Not tied (bolted) to adjacent case-by-case basis. Bolted adjacent Motor Control MCC 1(2)AP44E and may MCCs together as required.Centers impact MCC during seismic event.1AP27E Seismic interaction concern. N/A Interaction were be evaluated on a 4/22/2004 2AP27E Not tied (bolted) to adjacent case-by-case basis. Bolted adjacent Motor Control MCC 1(2)AP47E and may MCCs together as required.Centers impact MCC during seismic event.1AP11E "Shipping" bolts securing Bolts will be tightened Bolts tightened during B1R08 Work Done in 1AP13E internal coils to frame are not during Refueling B1R08 Transformers tight (approximate 1/4-1/2" Outage B1 R08 gap as nut is backed-off) 1AP10E Seismic interaction concern. Breakers will be Seismic interaction issues were 10/15/1997 2AP06E Adjacent, unanchored spare located in designated addressed.

2AP10E breaker(s) poses an area where no 2AP12E interaction hazard. interaction hazard Switchgear exists.2AP32E Seismic interaction concern. N/A Item has been relocated so as not to 12/23/1996****

Motor Control Adjacent, unanchored wash pose an interaction risk Centers station poses an interaction hazard.Table G-1 Page 2 of 7 G-3 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Description of Condition IPEEE Report Resolution Equipment ID Vulnerability*

Proposed Resolution Actual Resolution of Condition Date of Condition**

1AP32E Heat trace control cabinet Heat trace cabinet has Heat trace cabinet 1 HT04J has been 01/10/2001 Motor Control located in vicinity of MCC been welded to walked down and verified to be bolted to Centers was found to be unanchored.

foundation pad. steel which is welded to the foundation pad and therefore will not fall and/or make contact with MCC-1 32X5. Also, drawing 6E-0-3391 F confirms 1/8" thick 1.5" long @ 12" welds which meets the configuration.

1 DC01 E 1) Overhead lights hung N/A 1) S-hooks have been closed. 12/23/1996****

Station on chains with open S-Batteries hooks. 2) 2 Batteries are within %" gap criteria specified on vendor drawing.2) Gaps exist between batteries and end support members.1(2)DC03E Adjacent cabinets not bolted Interaction will be Evaluation has determined that 10/10/2001 1(2)DC05E together.

evaluated on a case- consequences of relay chatter can be Battery by-case basis. Bolt resolved by operator action. See NTS Charger & adjacent cabinets response.Distribution together as required.Center Bus lIP05E Interaction (impact) concern Duct box will be Duct box was secured to fan cabinet Work done in IlP07E with adjacent filter duct box secured as part of during BIR08. B1R08 lIP06E which is unsecured.

pending modification lIP08E scheduled for refueling Inverters outage B1R08.1DC02E Gaps exist between batteries N/A Batteries are within 1/4/4" gap criteria 12/23/1996****

Station and end support members. specified on vendor drawing.Batteries Table G-1 Page 3 of 7 G-4 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Description of Condition IPEEE Report Resolution Equipment ID Vulnerability*

Proposed Resolution Actual Resolution of Condition Date of Condition**

I(2)DC04E Adjacent cabinets not bolted Interaction will be Evaluation has determined that 10/10/2001 I(2)DC06E together.

evaluated on a case- consequences of relay chatter can be Battery by-case basis. Bolt resolved by operator action. See NTS Charger & adjacent cabinets response.Distribution together as required.Center Bus 1 RD05E Seismic interaction concern. Interaction will be Evaluation has determined that 10/10/2001 2RD05E Not tied (bolted) to adjacent evaluated on a case- consequences of relay chatter can be Reactor Trip 1 (2)RD03E.

May impact by-case basis. Bolt resolved by operator action. See NTS Switchgear during seismic event adjacent cabinets response.together as required.1 (2)AP92E 1 )Overhead lights hung on 1) S-hooks have been 1) S-hooks have been closed. 4/22/2004 1(2)AP93E chains with open S-hooks. closed. 2) Modification to connect cabinets Motor Control 2)Not tied (bolted) to 2) Interaction will be together was approved by TRC/BRC.Centers adjacent MCC. evaluated on a case- Breakers were relocated in designated by-case basis. Bolt areas where no interaction hazard adjacent MCCs exists.together as required.Table G-1 Page 4 of 7 G-5 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Resolution Date Actual Resolution of Condition* 4 .1-OPMOIJ OPM02J 1PM01J 1PM04J 1PM05J 1PM06J 1PM07J 1PM11J 1PM12J 2PM01J 2PM04J 2PM05J 2PM06J 2PM07J 2PM1IJ 2PM12J Main Control Panels 1) Unsecured aluminum diffusers in suspended ceiling pose a personnel hazard to operators if they are dislodged due to seismic motion.2) Interaction concerns with items in control room in proximity of cabinets such as lockers, copiers, tables and filing cabinets.1) Diffusers will be secured to support grid.2) Several items have been removed from control room. Other items will be removed or relocated as required.1) Analysis was performed which evaluated the MRC Eggcrate panels (ceiling diffusers) capability for withstanding a seismic event of a magnitude required by the IPEEE without an adverse effect. Conclusively the MRC ceiling diffusers are capable of withstanding a seismic event of a magnitude required by IPEEE without adverse effect.6/16/2003 h J Table G-1 Page 5 of 7 G-6 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Description of Condition

/ IPEEE Report Resolution Equipment ID Vulnerability*

Proposed Resolution Actual Resolution of Condition Date of Condition**

1(2)PA01J

1) Adjacent cabinets not 1) Interaction will be 1) Interactions were evaluated that 1/21/2000 1(2)PA02J bolted together.

evaluated on a case- addressed the loads for panels and 1(2)PA03J

2) Also have instrument cart by-case basis. Bolt concluded that they were acceptable 1(2)PA04J (or wooden table) in adjacent cabinets when linked together.

Vendor (S&A)1(2)PA06J proximity of cabinet, together as required.

walkdown confirmed these cabinets to 1(2)PA07J

2) IM equipment to be be linked together.1(2)PA08J stored/secured away 2) IM equipment was stored away from 1(2)PA09J from cabinets when cabinets when not in use.1 (2)PA10J not in use.1(2)PA11 J 1(2)PA12J 1(2)PA13J 1(2)PA14J 1(2)PA27J 1(2)PA28J 1(2)PA33J 1(2)PA34J 1(2)PA51 J 1(2)PA01J 1 PA52J Auxiliary Panels 21P06E Interaction (impact) concern N/A Fire extinguisher brackets secured.21P08E with adjacent fire Inverters extinguisher (A-8-27) which has an open (unsecured) retaining bracket.Table G-1 Page 6 of 7 G-7 12Q0108.20-R-001 Rev. 1 Correspondence No.: RS-12-161 Description of Condition

/ IPEEE Report Resolution Equipment ID Vulnerability*

Proposed Resolution Actual Resolution of Condition Date of Condition"**

1(2)AP98E Overhead lights hung on N/A S-hooks have been closed 12/23/1996****

1(2)AP99E chains with open S-hooks.Switchgear 2AP98E One "shipping" bolt securing Bolts will be tightened Bolts were tightened during B2R07. Work done in internal coils to frame is not during B2R07. B2R07 tight (approximate 1/4/" gap as nut is backed-off)

  • IPEEE "Vulnerability" = Vulnerability, Outlier, Anomaly, Enhancement, Finding, etc.** If this is different than the original planned, else N/A.***Field walkdown performed and confirmed bracket was acceptable.
        • Per Letter BY: 96-0323, "Transmittal of Byron Station Individual Plant Examination of External Events Submittal Report" dated December 23, 1996.Table G-1 Page 7 of 7 G-8
Retrieved from "https://kanterella.com/w/index.php?title=ML12341A165&oldid=1392996"