View source for DCL-12-119, Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.3 Seismic Unit 2, Part 2 of 3

{{Adams
| number = ML12333A271
| issue date = 11/27/2012
| title = Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.3 Seismic Unit 2, Part 2 of 3
| author name = 
| author affiliation = Pacific Gas &amp; Electric Co
| addressee name = 
| addressee affiliation = NRC/NRR
| docket = 05000323
| license number = DPR-082
| contact person = 
| case reference number = DCL-12-119
| package number = ML123330375
| document type = - No Document Type Applies
| page count = 142
| project = 
| stage = Response to RAI
}}

=Text=
{{#Wiki_filter:Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant. Unit.&#xa3; Equipment No. DC-2-14-M-TK-CCWST1                                                       Attachment i. Page 1 of 1 Licensing Basis Evaluation Issue:
S~rtace corrosion was noted on the base plates associated with the lateral braces on the east and west sides of the CCW Surge Tank.
Evaluation:
The CCW Surge Tank is Design Class I and seismically qualified. Visual examination indicates that this is surface corrosion. and will not impact the structural integrity of the tank supports.
Recommendation:
The coatings/corrosion needs to be cleaned, inspected. and repaired.
Notification Required: Yes (505.15141) ~
Evaluated by:   -~~~~---'.!7~.~-t-~A-4-"'"- '   ___               q-t--
l2---=-
                                                                          ~ '_11-_. - - -
Reviewed by: ____         --1)f:l'L-V~t).~*~~1:.....J_I~-=---------'D+_IZL~/-,z.,---------
( I

Seismic walkdo1Nl1 Checklist (SWC)                                                             Status:   y Equipment 10 No        OCw2*14-P-VOA-CCW~2-FCV-365                                                  Equipment Class:            I Equipment

== Description:==
CCW Heat Exchanger Flow Contra1 Valve Location:         Building:   ~                            FloorEI.      M                          Room, Area: 2-FCV-3S5 Manufacturer. model, Etc.
--.----~,-----                                                       ---_._-.... _..----,-------------'
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 judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.                                                                                        .
Anchorage
: 1. Is the anchorage configuration Verification required (I.e. Is the Item   ~ne of the 50% of SWEL Items requirIng such                       N verification)?
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
: 3. Is the anchorage free of corrosion that is more than mild surface oxidation?
y I
                                                                                                                                                    '1
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                                 N/A
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is                      N/A 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?                                 y Interaction Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                                       y
: 8. Are overhead equipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to                           y collapse onto the eqUipment?
: 9. Do attached lines have adequate flexibility to avoid damage?
y
: 10. Based on the above seismio Interaction evaluations! Is equipment free of potentially adverse seismic Interaction effects?                                                                                                                                      y Other Adverse Conditions
: 11. Have you looked for and found no other seismic condItIons that could adversely affect the safety function of the                          Y equipment?
Page 10f8

Seismic Walkdown Checklist (SWC)                  Status:   Y Equipment 10 No PC-2-14-P-VOA-CCW-2-FCV-365                    EquIpment Class: Z Equipment

== Description:==
CCW Heat Exchanger Flow Control Valve Comment:
No seismic concerns.
Evalyated by:
I
                                                                                                  \
Page 2 of 8

Sheet 1 of4 Status: ~
Seismic Walkdown Checklist (SWC)
Equipment ID No.            DC-2-16-P-P-LINE-2242                            Equipment Class 12  o. (Other)
Equipment

== Description:==
Retum Piping from Make-Up Water Transfer Pump Location: Bldg.        Auxiliary        Floor El. ..:;..14..:....:0~'_ __ Room, Area Unit 2 Fuel Handling Area Manufacturer, Model, Etc. (optional but recommended) :.::n/~a:...-.._ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
Instructions for Completing Checldist This checklist may be used to document the results of the Seismic Wa1kdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results ofjudgments and findings. Additional space is provided at the end of the checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (i.e., is the item one of the 50% of SWEL items          N requiring such verification)?
: 2. Is the anchorage free of bent, broken, missing or loose hardware?                                            NIA This SWC applies to potential SFP rapid drain-down through a pipe enteting the SFP. Therefore, anchorage is not applicable.
: 3. Is the anchorage free of corrosion that is more than mild surface corrosion?                                 NIA
: 4. Is the anchorage free of visible cracks in the concrete near the anchorage?                                 N/A
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only               NIA applies if the item is one of the 50% for which anchorage configuration verification is required.)
: 6. Based on the above anchorage evaluations, is the anchorage fi'ee of potentially adverse seismic             N/A conditions?
Interaction Effects
: 7. Are soft targets free fl.*om impact by nearby equipment or structures?                                      NIA This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, seismic interaction effects are not applicable.
: 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not       NIA like1y to collapse onto the equipment?
: 9. Do attached lines have adequate flexibility to avoid damage?                                                NIA
: 10. Based on the above seismic interaction evaluations, is the equipment free of potentially adverse            NtA seismic interaction effects?
12 Enter the equipment class name from Appendix B: Classes of Equipment

sheet 2 of4 Status: _Y_
Seismic Walkdown Checklist (SWC)
Equipment ill No.              DC-2-16-P-P-LINE-2242                          Equipment Class l2    o. (Other)
Equipment

== Description:==
Retum Piping fi'om Make-Up Water Transfer Pump Other Adverse Conditions 11;    Have you looked for and found no other seismic conditions that could adversely affect the safety                   NIA function of the plant equipment?
This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, safety functions ate liot applicable.
Comments (Additional pages may be added as necessary)
This SWC applies to potential SFP rapid ~h'~in-~own through the return pipe fi'Ol11 the Make-Up Watei' Transfer P~lmp, which enters theSFP at its n011h end. This pipe crosses over the top of the concrete wall which separates the SFP from the Cask Washdown Area (CWA) (~ee photo on sheet 3). The open end of the pipe is located slightly below the waleI' surfac~ in the SFP (several inches), which is significantly more than 10' above the spent fuel assemblies stored in the SFP (approx. elevation 122'),
rapid drain-down of the SFP inventorY through this pipe is not possible.
Evaluated by:      _W:.:....:R::.:.:.H-=---~L~
d~ ~~.te:~~.-..:tWJ.1~
kQ ===::::::==------            Date:      10/04/2012 DRCjjVP                           ~                                                    10/04/2012 12 Enter   the equipment class name from Appendix B: Classes of Equipment

Seismic Walkdovvn Checklist (S\IVC)                                                                                                                                                Status:                                Y Equipment 10 No OC-2-17-M-PP-ASP1                                                                                                                                                      Equipment Class: &sect; EquIpment

== Description:==
 .                      ASW pump No, 1
                                                                           .. _.............. _-_ .....* _--_ .......... -.--.-.-- .... -......                                  --~--                                               ---_.. _--------_ .....__.*........._-
Location:                 Building:           ~                                                           Floor EI.               .:aJ.                                                Room, Area:                       2.:ASP1 Manufacturer. model. Etc.
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 us~d to record the results of Judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (I.el Is the Item one of the 50% of SWEL Items requiring such                                                                                                                                                                 y verification}?
Y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
There Is no free, bent, broken, missing or loose hardware In the anchorage.
y
                                                     'S
: 3. the an9horage free of corrosion 1h~t Is mor~ than mild surfac~ oxidation?
Outer (6) J-bolts shows some corrosion. See Attachment 1 for disposition.
: 4. Is the anchorage free of visible cracks In the concre!e near the. anchors?                                                                                                                                                                                                         Y Concrete near the seismic strut had previously been rep/aced. Shrinkage (rom the replaced concrete has caused the original surrounding concrete to craGk*.Cracks a(6 small a.ndJudged not to be an Issue.
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the item is                                                                                                                                                                Y one of the 50% for which an anchorage configuration verification is required.)
The anchorage Is consistent with plant documentatlon. (6) 1-1/4" bolts are present on the bottom base plate. (12) 1-1/4" bolts on the top base plate are present. The top of the pump Is laterally braced with 8 strut In one lateral direct/on. The opposite lateral direction Is braced with two struts on each end of the pump with a 1/16" seismic gap with bumpers. The shims on the bumpers were not consistent with the design drawings. See Atachment 2 for resolution.                                                                                                                                        .
: 6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?                                                                                                                                                                          y Interaction Effects
: 7. Are soft targets free from Impact !>y nearby ~qulpment or structures?                                                                                                                                                                                                               y No credible sources were seen that could Impact soft targets.
: 8. Are overhead equipment. dIstribution systems, celling tiles, and lighting. and masonry block walls not likely to                                                                                                                                                                    y
:.;.::;**'~*~*:* .*"**"':*'*:'--*'*--*'..                                                                   . ..
                                          *"-***'*"tOliapSEr()nto'the"='eqotpmel'it?.-:*'~"~*:.-**"-*C.l!'! .-!.~-~ ~!!.-.!~""-". . .!.--::.** *.                                                          ..
                                                                                                                                              ~~ ,.-!.-;.-.'.--."~.~.~~~'=~.-.~.~~~".-"'.=,~-...:'-"-~".:.~ "-".,~-"'-'-"'-'--'-'-.__              ...
                                                                                                                                                                                                                                      ~-:..=.'-'-., :..:..;~ .....":_-:.,:...:_'..o:..-"-.",."'-:~._ . .....*.~c*...,'-'"-*_*:..-~_*_,.-:.".".._:.".~ __ ...... _~ ........ .
No block waifs or ceiling tiles In the room. Overhead light fixture and HVAC appear to be adequately secured to prevent collapse.
: 9. Do attached lines have adequate flexlblllly to avoid damage?
y All attached lines appear to have adequate flexibIlity.
: 10. Based on the above seismic interaction evaluations, Is equIpment free of potentially adverse seismic Interaction effects?                                                                                                                                                                                                                                                                               Y No credible seismic interaction Issues were Identified.
Other Adverse CondltiQns
: 11. Have you looked (or and found no other seismic conditions that could adversely affect the safety function of the                                                                                                                                                                   Y equipment?
Page 1 of 17

Seismic Walkdown Checklist (SV\IC)                                                                                                                                                                                                                                                  Status:                             Y Equipment ID No                                        pC..2..17..M-PP..ASp1                                                                                                                                                                                                                Equipment Class: .2 Equipment Des~ription:                                                ASWrumpNo 1 Comment:
Eyaluated by' I 0/ 'J.~/ aOl;)'"
SMM
                                                                                                                                        ~~
               * : ** :~._", ... ,...l: _. : _ _ _ ,_._ ~_ *** _..:_~:- ** - - ****_____ .... _.: .. _._ ** .;. **.* : _ _ _ .~~-** _ _ _ .l..:"; ****_ .* _.-:; .*~...."':':'.:-:.': .. _':::.::-:.':. :-_ _ .:'~_':::":-_',:-~.',:.;:.:"":.'':''_:..:....:!.'..:;:.~.:::.::.~'~.::;~.!:....::.._._:..'.!.....:.:...:..:.: __~.~.:,..--:..-.:-:* .:.** _..:.**___*..:_._.:.:..:.:;_.~_.!-:.-:...*_ ... __ . __ :_ ... _ .*.* .:...*... ,! **.*: ........... .:. **. ~I. :
* Page 2 of 17

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit..&#xa3; Equipment No. DC-2-17-M-PP-ASP1                                                    Attachment i. Page 1 of 1 Licensing Basis Evaluation Issue:
Outer (6) J-bolts show some corrosion.
Evaluation:
Corrosion will not compromise structural integrity of the connection. The base support, in conjunction with the seismic braces still adequately restrain the pump and motor. Cleaning and recoating required.
Notification Required: Yes (50509855)
Evaluated by:        ~~ . / _
Reviewed by:                               -A. ee~             (/\

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit.&#xa3; Equipment No. DC-2-17-M-PP-ASP1                                                         Attachment 21 Page 1 of 1 Licensing Basis Evaluation Issue:
An issue was noted with the configuration of the seismic support on the ASW 2-1 pump motor (hanger no. 28-44R). Specifically, the configuration of the shims on the north and south "bumpers" do not match the configuration shown on the engineering design drawing (drawing no. 051373, sheets 52,53, etc.). The shims specified on the Bill of Materials (Item No. 32) are 8"x8" plates, with 4 holes for the bolts (thickness per field). Instead of a square plate, individual"finger" shims (a rectangular plate, with a u-shaped slot) are installed on each of the bolts.
Evaluation:
The finger shims perform the same design function as the specified square shim plate (i.e., transfer seismic loads in compression from the motor to the concrete walls), so this condition does not impact the ability_ of the support to perform its intended function. However, this is a configuration control issue (Le., as-built condition is not reflected on the design drawing).
Recommendation:
Issue the appropriate design change vehicle (pipe support MMD) to update the drawing to reflect the as-built configuration.
Notification Required: Yes (50513498)
Evaluated by:     ---,~~-~-5~~~_-..:.t_"'-,-I_~-..L../':""'2-------------
Reviewed by: _ _ _ _ _ _                   ;A--I...loI...lQ~~----~--r==~-~-r0-l-'/l:;...:...2---I.h~~-'------

Seismic Walkdcwvn Checklist (SWC)                                                 Status:'  Y Equipment Class: 1 Equipment

== Description:==

ASW Flow Control Valves Location:          Building:    ~                              Floor EI. 1J.5.                    Room. Area: 2-CCWHE Manufacturer, model, Etc.        Fisher Governor Company 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 judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments, Anchorage
: 1. Is the anchorage configuration verification required (te, is the Item one of the 50% of SWEl items requfring such               N verification)?
The bottom side of the valve Is bolted to 8 pipe flange that Is located just above the penetration to the floor. At the tOPJ the valve Is bolted to a flexible bellows section that is in tum bolted to the tube-side nozzle of the CCW Heat             y Exchanger.
: 2. Is the anchorage free of bent. broken, missing or loose hardware?
y
: 3. Is the anchorage free of corrosion that Is more than mUd surface oxidation?
: 4. Is the anchorage free of visible cracks in the concrete near the anchors?                                                       N/A
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the Item is            N/A one of the 50% for which an anchorage configuration verification Is required.)                                         .
: 6. Based on the above anchorage evaluations, is the anchorage free of po~entially adverse seismiC conditions?                       y Interaction Eftacts
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                            y
: 8. Are overhead equipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to                 y collapse onto the equipment?
Reinforced block wall near valve has ~dditional reinforcement at the base and near the top.
: 9. 00 attached lines have adequate flexibility to avoid damage?
y
: 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismIc interaction effects?
* y Other AdyarseCondltlons
: 11. Have you looked for and found no other seismic conditions that courd adversely affect the safety function of the               y equipment?                           .
The valve Is housed In a pit and the electrical lines to the valve position Indicators are supported off Un/strut members bolted to the bottom of the pjt. Altho(!gh there is 8 drain In the pit, It would be possible for water to collect in the pit which could result In loss of the position Indication signal. However, there is no credible water source over the pit.
Page lof6

Seismic Walkdo1lVl1 Cheddist (SWC)               Status:   Y Equipment ID No pC-2-17-P-VOA-SW-2-FCV-602                     Equipment Class: Z Equipment

== Description:==
ASW Flow Control Valves Comment:
I;valuated by*
Page 2 of 6

Seismic Walkdown Checklist (SWC)                                               Status:   Y Equipment ID No DC-2-21-E-HT..LOH1                                                          Equipment Class: Q Equipment

== Description:==
DG No 1 Lube Oil Electric Heater LocaHon:          Building: Iw:bltlst                     FloorEI. a&sect;                       Room. Area: 2-pEG-21 Manufacturer. mode'. Etc. Wallow Industries UZ-10-56Z-1 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 judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments .
Anchorage
: 1. Is the anchorage configuration verification required (i.e. Is the Item one of the 50% of SWEL Items requiring such         N verification)?
y 2: Is the anchorage free of bent, broken, missing or loose hardware?
No bent, broken, miSSing or loose hardware.
: 3. Is the anchorage free of corrosion that Is more than mild surface oxidation?                                               Y No significant corrosion.
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                  y No cracks observed near the anchors.
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the Item Is      N/A one of the 50% for which an anchorage configuration verification is requIred.)
Consistent with drawing 663082-326
: 6. Based on the above anchorage evaluations. Is the anchorage free of potentially adverse seismic conditions?                 y Interaction Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                       y
: 8. Are overhead equipment, distribution systems, celting tiles, and lighting. and masonry block waifs not likely to           y collapse onto the equipment?
Heater Is located under 8 permanently floor mounted steel platform, which protects it from falling Items. No masonry walls.
: 9. Do attached lines have adequate flexibility to avoid damage?
y OJ/lines have flex connections, electrical conduit has sufficient flexibility
: 10. Based on the above seismic interaction evaluations. Is equipment free of potentially adverse seismic fnteraction effects?                                                                                                                      y Other Adyerso Conditions
: 11. Have you looked for and found no other seismic conditions that courd adversely affect the safety function of the          Y equipment?                                                   .
Page lof7

Seismic WalkdolNl1 Checklist (SWC)                Status:   Y' Equipment 10 No PC-2-21-E..HT-LQH1                            Equipment Class: 11 Equipment

== Description:==
DG No, 1 Lube Oil Electric Heater Comment:
Evaluated by'
                                                            \
Page 2of7

Sei$mic Walkdovvn Checklist (SWC)                                          Status:   Y Equipment ID No pc-2-21ME-S-EQD-21                                                          Equipment Clas~:   .H Equipment

== Description:==
pG No. 1 PC Power Supply Transfer Switches Location:          Building: It.tJ:llirul                 FloorEI. M                        Room, Area:  2~DEG-21 Manufacturer, model, Etc.        Square D  cat No  82263 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 judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.
Anchorage                                        .
: 1. Is the anchorage configuration Verification requIred (I.e, Is the Item one of the 50% of SWEL Items requiring such          y verification)?
Y
: 2. Is the anchorage free of bent. broken, missIng or loose hardware?
No bent, broken, missing, or loose hardware.
y
: 3. Is the anchorage frea of corrosion that Is more than mild surface oxidation?
No significant corrosion.
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                 .Y No cracks observed, but the anchorage system doesn't rely on the fire-proofing concrete on the column.
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is        Y 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?                  y Interaction Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                        Y Conduit Is well supported on concrete wall and building column,
: 8. Are overhead equipment, distribution systems. ceiling tiles, and lighting. and masonry block walls not likely to            y collapse onto the equipment?
Overhead lighting Is adequately supported, conduit /s well supported. No masonry wal/s.
: 9. &#xa3;?o attached lines have adequate flexibility to avoid damage?
y The attached conduit Is supporl~d near the panel box to the same structural column as the panelltself. No significant relative displacements are expected.
: 10. Based on the above seismic Interaction evaluations, Is equipment free of potentially adverse seismic interaction effects?                                                                                                                      y Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversery affect the safety function of the           Y equipment?
Page 1 of 10

Seismic walkdo\Nl1 Checklist (SWC)                                           Status:    y Equipment Class: ~
Equipment 10 No DC-2-21-E-S-EQO-21 Equipment

== Description:==
PG No, 1 DC POwer Supply Transfer Switches Comment:
The panel box Is bolted to a Un/strut assembly that is welded to the steel building column. The UnJstrut members welded to the column are encased In the concrete fire-proofing cover. Internal components are adequately secured to panel box, no mIsSing screws Evaluated by:
::~jjt
                                                                                            ~
                                                                                        /<..>} 11 (2-ct '2.
to II? {WIL Page 2of10

Seismic. walkdo1Nl1 Cheddist (SWC)                                           Status:     y Equipment to No DC-2w21*E-S-EQD-23                                                           equipment Class:   ~
Equipment

== Description:==
pG No, 3 DC power SuJWly Transfer Switches Location:         Building: l1trJ2lD.e.                    FloorE!. 85                       Room. Area: 2-PEG-23 Manufacturer, model, Etc.      Square 0 Company Instructions for Completing Checklist This checklist may be used to docwnent the results of the Seismic Watkdown of an item of equipment on the SWEL The space below each of the following questions may be used to record the results 9f judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (I.e, is the Item one of the 50% of SWEL Items requiring such          y verification) ?
The small panel Includes (4) welded tabs at each corner through which (4) 318" bolts secure the pane' to (2)
Un/strut assemblies located at the top and bottom of the panel. The Unistrut assemblies are In turn welded to a              y building column (covered by fire resistant material).
: 2. Is the anchorage free of bent, broken. missing or loose hardware?
y
: 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?                                                 'N/A
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is        y one of the 50% for which an anchorage configuration verification is required.)
Anchorage Is C?Onslstent wIth drawings 6630B2~199~1 and 505413-1.
: 6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seis'mlc conditions?                 y Interaction Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                        y
: 6. Are overhead eqUipment distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to             y collapse onto the equipment?
: 9. Do attached lines have adequate flexibility to avoid damage?
y All connecting eJectrlcallines are contained within rigid conduit.
: 10. Based on the above seismic Interaction evaluations, is eqUipment free of potentially adverse seismic Interaction effects?                                                                                                                       y Other Ady,grse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the          y equipment?
Page lofl0
                                                                       .---------------.~.-

Seismic WalkdolNll Checklist (SWC)                      Status:     Y Equipment 10 No PC-2-21-E-S-EQD-23                                  Equipment Class: M Equipment

== Description:==
PG No 3 DC Power Supply Transfer SwItches Comment:
Evaluated by-Page 2 of 10

Seismic Walkdown Cheddist (S\IVC)
_ _ _ _ _ _ _ _ _ _ _ _ _ _
* _ _ *** _ . _ *** _ _ u . _ _ _                                                      Status:   y Equipment 10 No DC-2-21-M-EN-OEG1                                                            Equipment Class:  1I Equipment

== Description:==
Diesel Generator No, 1 (Engine and Generator)
Location:         Building: ~                                FloorEI.   ~.                   Room, Area: 2-pEG-21 Manufacturer, model, Etc. Arco engine Co 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 eaOh of the following questions may be used to record the results of Judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.              '       .
Anchorage
: 1. Is the anchorage configuration verification required (i.e, Is the Item one of the 50% of SWEL Items requiring such          y verification)?
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
No bent, broken, miSsing, or loose hardware,
: 3. Is the anchorage free of corrosion that Is more than mUd surface oxidation?                                                Y Only very mInor surface corrosion at the radIator end
: 4. Is th~ anchorage free of visible cracks In the concrete near the anchors?                                                  Y No cracks observed In the concrete near the anchors.
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item is       Y one ofthe 50% for which an anchorage configuration verification Is required.)
14 -1~1/4In sleeved anchor bofts and 10 lateral seismic stays (3 on each side, 2 at each end) , see drawings 663082-103 (4 pages), 443080 sheet 1, 443079 sheet 1, 4004947 sheet 1
: 6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?                 y Interaation Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                       y Only possible soft targets are stainless steel tubing, but no credible Interaction sources.
: 8. Are overhead eqUipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to           y collapse onto the equipment?
No credible Interaction sources. Overhead piping, Cardox pipIng, and conduit are well supported. Lighting Is hung by conduit. No masonry walls.
: 9. Do attached lines have adequate flexibility to avoid damage?
Y
: 10. Based on the above seismic Interaction evaluations, Is equipment free of potentially adverse seIsmic Interaction effects?                                                                                                                      y Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the sarety fUnction of the          Y equipment?
Page lof11

Seismic WalkdolM1 Checklist (SWC)                               Status:    Y Equipment 10 No DC-2-21-M-EN-OEG1                                            Equipment Class: 1I Equipment

== Description:==
piesel Generator No. 1 (EngIne and Generator)
Comment:
Includes subcomponents: DC-2-21~M-TK-DFODT1. DC-2-21-M-PP..JWP1, DC-2-21-M-GN-DEG1, DG No.1 Main Lead Term;nal Box                                                          .
Evaluated by:
Page 2 of 11

Seismic WslkdolNn Cheddist (SVVC)                                            Status:    y Equipment 10 No DC:2-21-M-EN*DEG3                                                             Equipment Class:   1Z Equipment

== Description:==

DieSel Generator No.3 (Engine and Generator) location:         Building:  I.u.r.b1D.e.                  FloorEI. a:i                       Room, Area: 2 OEG';23 w
Manufacturer. model, Etc.        ALCQ Power fns~ctions for Complellng 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 judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.
Ancho~aqe
: 1. Is the anchorage configuration verification required (i.e. (s the item one of the 50% of SWEL items requiring such           y verification)?                 .                                                    .
The Diesel Generator skid is anchored by (14) 1-114" sleeved anchor bolts and (10) lateral stops (3 on each side and 2 on each end),                               .                                                                          y
: 2. Is the anchorage free of bent. broken, miSSing or loose hardware?
y
: 3. Is the anchorage free of corrosion that is more than mild surface oxidation?
: 4. Is the anchorafJe free of visible cracks in the concrete near the anchors?                                                   y
: 5. Is the. anchorage configuration consistent with plant documentation? (Note: This question only applies If the item Is        y one of the 50% for which an anchorage configuration Verification is required.)
The anchorage of the skid Is Identical to th(Jt ~hown on drawings 498524-1 and 498528-1.
: 6. Based on the above anchorage evaluations. Is the anchorage free of potentially adverse seismic conditions?                   y The welds cannot be seen on the SE comer side restraint. Welds for all other side restraints are visible. It appears that the welds to the baseplate may have been covered by the floor s'uny that was poured to promote proper drainage in the room. For disposition see Attachment 1.
Interaction Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                         y Soft targets consist only of small tubing lines. No credible falling sources were Identified.
: 8. Are overhead equipme.nt, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to            y collapse onto the eqUipment?
: 9. Do attached lines have adequate flexibility to avoid damage?
y All parts are on a common skid and all skid-mounted 1Iems appear to be properly anchored to the skid.
: 10. Based on the above seismiC Interaction evaluations, is eqUIpment free of potentially adverse seismic Interaction effects?                                                                                                                        y Other Adyerse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the            y equipment?
Page 1 of 23

Seismic Walkdown Cheddist (SWC)                                        Status:    Y Equipment 10 No DC-2-21-M-EN-DEG3                                                   Equipment Class:   1Z Equipment

== Description:==
Diesel Generator No 3 (Engine and Generator)
Comment:
Includes The following subcomponents.
Fuel Oil Day Tank DC-2-21-M-TK-DFOD T3 which is a welded steel box that is located under the engine and integra' with the skid. No structural integrity Issues were identified.
Radiator Water Pump DC-2-21-M-PP..JWP3 which is attached.to the engine and w.as reviewed.
Electrical Generator DC-2-21-M-GN-DEG3 Which was reviewed.
Evaluated by' Page 2 of 23

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit..&#xa3; Equipment No. DC-2-21-M-EN-DEG3                                                           Attachment 1, Page 1 of 1 Licensing Basis Evaluation Issue:
Welds cannot be seen on the SE corner side restraint. Welds for al/ other side restraints are visible.
Evaluation:
The work activity that installed the horizontal restraints for the 2-3 Diesel Generator was QA Class I and QA/QC was.required, as shown in the original construction package C0073102 Activity 07. A copy of this completed activity clearly shows that this weld was installed per the design drawings and inspected per approved QA/QC processes (ref. pages from the work order activity that label this restraint as IIEMBED #6 11 and the weld in question as FW-5).
Since construction work package C0073102..07 documents that the welds on the SE corner horizontal restraint are identical to that shown on drawings 498524-1 and 498528-1, and all other welds on these horizontal restraints have been verified in the field as sufficient, it can be reasonably assumed that these welds are installed as well.
Therefore l no further action is required.
Notification Required: No ( )
Evaluated by: _____    -A""--~=-_~_. _-+-0-.;......
_ __       'O...:-{2_6. ./I_'2-_.
Reviewed by:    -~~~~~~b='""7'.         =-...-;T----.e:.7"-1,.;.U~eJr.....&------!:I.~qb:....=&#xa3;..:.....::~+:OL.:::;t-~------

Seismic Walkdovvn Checklist (SWC)                                              Status:   Y Equipment 10 No OC~2-21 .. M-MISC-ES1                                                       Equipment Class: Q Equipment

== Description:==
pG No 1 Exhaust Silencer Location:        Building: Turbine                        Floor EI. l.Q.Z                   Room, Area: 2*DEG*ES-21 Manufacturer, model t Etc.
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 Judgements and findings. Additional space Is provided at the end of this checklist*for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (I.e, Is the Item one of the 50% of SWEL Items requiring such         y verificatlQn)?
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
y
: 3. Is the anchorage free of corrosion that Is more than mild surface oxidation?
No corrosion observed.
: 4. Is the anchorage free of visible cracks in the concrete near the anohors?                                                  Y
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is       Y one of the 50% for which an anchorage configuration verification is required.)
The silencer Is anchored on two saddles, one a sliding support, the other a fixed support. Each saddle /s anchored to 8 concrete pier with two 1 In diameter bolts.
: 6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?                 y Interaotlon Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                       y No soft targets
: 8. Are overhead equipment, distribution systems, celling tiles. and lighting. and masonry block walls not likely to           Y collapse onto the equipment?
()verhead rod hung small piping unlikely to COllapse, adjacent masonry walls have out of plane strengthening and are not an interaction Issue
: 9. Do attached lines have adequate flexibility to avoid damage?
Y
: 10. Based on the above seismic Interaction evaluations, Is equIpment free of potentially adverse seIsmic interaotion effects?                                                                                                                      Y Qthor Adyarse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the          Y equipment?
Page lof7

Seismic Walkdo\Nl1 Checklist (SVVC)                 Status:   Y EquIpment 10 No. OQ..2-21-M-MISC-ES1                            Equipment Class: .Q Equipment

== Description:==
DG No. 1 Exhaust Silencer Comment:
Evaluated by:
OK~~                     ~
Jll (t1/~J'2.
ORe         ~~Q~         IO{I1!(JJIG Page 2 of7

Seismic                                                                      Status:   xN Equipment ID No DC-2-21-M-MISC-ES3                                                          Equipment Class: .Q' Equigmel1t !J:scription:     OG NO.3 Exhaust Silencer location:         Building: Turbine                        FfoorEI. 107                     Room, Area:   2~DEG-ES-23 Manufa?turer, model. Etc,      Kittell Muffler & Engineering Company Instructions for Completing Checklist Tnis 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 judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.
Ancborage
: 1. Is the anchorage configuration verification required (i.e, is the item one of the 50% of SWEL items requiring s.uch           N verification)?
The Exh?ust Silencer is supported by two saddle supports set on shoft concrete pillars. The inlet side support is fixed and the outlet side support is sliding. Two (2) embedded bolts anchor each saddle.                                      Y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
y
: 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?                                                    y The silencer has no visible corrosion.
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is        N/A 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?                   y Interaction Effects
: 7. Are soft targets free from impact by nearby eqUipment or structures?                                                         Y There are no soft targets for silencer.
: 8. Are overhead equipment, distribution systems, ceiling tifes, and lighting. and masonry block walls not likely to             Y collapse onto the eqUipment?
Some rusting ofpipe clamp on line (possibly conduit) running over silencer. No impact on silencelNearby
  ,reinforced block wall includes substantial additional steel support framing.
: 9. Do attached lines have adequate 'flexibility to avoid damage?
y
: 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?                                                                                                                        y Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the          ~
~~~                                                                                                                               N Washers at sliding support (south end of silencer) are too small and do not adequately sRan the width of the slotted hole in the support baseplate. For disposition see Attachment 1.                                          '         ""  ,,,l1 #12..
                                                                                                                     .ftJt- 4t/ u/,z.,..
Page 1 of 18

Seismic Walkdovvn checklist (SWC)               Status:    -r N EquipmentfD No DC-2~41~M-MISC-ES3                              Equipment Class: Q      \(,P\ U" \'\ - \ ~
                                                                                   ~ II/-z.oll ~
~quiprn~nt Oesc:ription:   DG No_ 3 Exhaust Silencer Comment:
                                      ~. e~
EvaJuatpd by':                          Date-
_,     '      aA             /o)~S/2. .01 2..
l<A
                                                 .~~~          \OJ2~JI'~ ~
Page 2 of 18

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit &#xa3; Equipment No. DC-2-21-M-MISC-ES3                                                                         Attachment 1, Page 1 of 1 Licensing Basis Evaluation Issue:
Washer at sliding support (south end of sllenoer) are too small and do not adequately span the width of the slotted hole In the support baseplate.
Evaluation:
The appropriate bearing area between the underside of the nuts on the anchor rod at the sliding end of the silencer (see drawing no. 498841"DG Exhaust Silencer Support @ EI. 10T~01t and silencer drawing shown on sheet $-13 of calculation no. D~21.1"4) and the top surface of the foot of the silencer is not achieved due to the size of the nut and washer relative to the width of the slotted hole (it appears that the washer may be distorted, and drawn slightly into the slotted hole).
Due to the above mentioned condition, the tensne capacity of the anchor rod could be reduced due to reduction in bearing area under the nut.
Impact Assessment:
- A review of the seismic calculation for the silencer anchorage (calc. no. D-21.1-4) indicates that the tensile (upwards acting load due to seismic loading combination) is approx. 5,000 Ibs, compared to a full allowable tensile load for the anchor rod of 63,600 Ibs. Since the capacity is over 10 times the demand, the potential reduction in capacity due to reduced bearing area can easily be accommodated*
* In addition, the vertical support for the exhaust silencer provided by the anchorage at the fixed-end, and the vertical support provided by the nearby pipe supports on the exhaust discharge piping will be able to accommodate any load redistribution from the sliding end support.
Therefore, this condition does not prevent the exhaust silencer from performing its intended function during and after a seismic event.
Furthermore, Piping study carculation 2168 is prepared to analyze the existing condition of EDG 2~3 silencer. There were two ME101 runs prepared to depict two different boundary conditions for EDG 2-3 silencer. The ME101 outputs are provided to evaluate the anchorage of E~G 2-3 silencer. Two cases are analyzed 1) no* vertical restraint at node 45 (s10tted end). and 2) no bilat at node #45.
Based on the analysis, the results on the anchor bolts at fixed end (node #40) are still Within the allowable. Therefore, It is determined that the as-found condition has no adverse effects on the seismic qualification of EDG 2-3 exhaust silencer.
Notification Required: Yes (50509522)
Evaluated by: _ _ _            +.~~~=' ----.::~=:;a:;,;~~f~--* ~.....I'/)t:.....;;Z;.;...1....;/~/-"2..--------
                                             &#xa5;ro Reviewed by:     ---J+-L-,~O;::;O*".AJ.A~QIiI.lIoo!~~~=t:~~==+=--__- .,.;. I. ;. 0r/7-~3. :;..; ;."f1"r..:2-~*-------

Seismic Walkdovvn Checklist (SVVC)                                             Status:      Y Equipment 10 No DC-2-21-M-MISQ.IS1                                                           Equipment Class: .Q Equipment

== Description:==
PG No, 1 Inlet Silencer Location:         Building: ~                               FloorEI.    ~                    Room, Area: 2-0EG-21 Manufacturer, model. Etc. Kittell Muffler aod Engineering, Instructions for Completing Checklist This checklist may be used to document 1he 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 rec,ord the results of judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (i.e, is the item one of the 50% of SWEL Items requiring such            N verification)?
Bolted to the Intake pipe with 20 1-114 Inch boffs In a flange connection. flexible connection to the turbocharger, just above the flange connection the Intake pipe Is supported on the concrete wall                                                   Y
: 2. Is the anchorage free of bent. broken. miSSing or loose hardware?
No bent. broken, or missing hardware.
y
: 3. Is the anchorage free of corrosion that Is more than mlld surface oxidation?
No corro$ion obs8/Ved.
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                      Y
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the Item Is          N/A 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?                     Y The Intake pIpe support Is anchored to the concrete wall with 4 through-bolts Interaction Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                           y No real soft targets.
: 8. Are overhead equIpment. distribution systems. ceiling tiles. and lighting. and masonry block walls not likely to               y collapse onto the equipment?
No masonry waf/so Piping, Cardox pipes, and conduit are well supported.
: 9. Do attached lines have adequate flexIbility to avoid damage?
y The silencer has a flex connection where It joins the main body of the diesel generator.
: 10. Based on the above seIsmic interaction evaluations. Is eqUipment free of potentially adverse seismIc Interaction effects?                                                                                                                          Y Other Adverse Conditions
: 11. Have you looked for and found no other seIsmIc conditions that could adversely affect the safety function of the              Y equipment?
Page 1 of6

Seismic Walkdovvn Checklist (SWC)                Status:   Y Equipment 10 No PC-2-21-M-MISC.IS1                            Equipment Class: Q Equipment

== Description:==
PG No, 1 Inlet Silencer Comment:
Evalyated by:                            Dam;,
10 \  r1/~v{ 1.
                                                                 'O/'?/ zo rl-Page 20f6

Seismic WaikdolNn Chedclist (SV\IC)                                           Status:    y Equipment 10 No DC..2-21-M-MISC-IS3                                                        Equipment Class:
Equipment

== Description:==
DG No.3 Inlet Silencer Location:          Building: Turbine                        AoorE!. 1m                   Room, Area: Z-DEG-23 Manufacturer. mode~   Etc. Kittell Myffler & Engineering Company Instructions for Completing Checklist This checklist may be used to document the results of tha Seismic Walkdown 9f an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of Judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration Verification required (Le. Is the item one of the 50% of SWEL items requiring such           N verification)?
: 2. Is the anchorage free of bent, broken, miSSing or loose hardware?
v y
: 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?                                                  NfA
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is       N/A 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 seismlo conditions?                  y Inlet Silencer is connected to the piping by means of a bolted flange. The plpfng is supporled both vertically and hor;zontally just above the Silencer.
Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                        y
: 8. Are overhead equipment. distribution systemsl ceiling tiles, and lighting, and masonry block walls not likely to            y collapse onto the equipment?
: 9. 00 attached lines have adequate flexibIlity to avoid damage?
SJlencerffurbo-charger connection Is by means of a fleXible Joint.
v
: 10. Based on the above seismic Interaction evaluations, is eqUipment free of potentially adverse seismic interaction effects?                                                                                                                       y Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the           Y equipment?
Page lof6

Seisnic Walkdovun Checklist (SVVC)                                    Status:    Y Equipment 10 No DC-2-21-M-MISC-IS3                                                 Equipment Class: Q Equipment Descriptiqn:   DG No 3 Inlet Silencer
- ~-     - - - - -- - - ---                    - - --- -
Comment:
                                         ~K!~
Evaluated by:
KA
                                         ~A~~~1t.  ~~~:-L. . .:=-----fi""""P"t};~ fO/:1.2-/,2- *
                                                                                                                      .I Page 2 of6

Seismic WalkdollVl1 Checklist (SVVC)                                         Status:   Y Equipment 10 No pC-2-21-M-TK-AR1A                                                            Equipment Class:      21 Equipment

== Description:==
PG NQ. 1 Air Start Recejyer A Location:         Building:   :D.u:1lIruz                   FloocE!.    ~
Manufacturer, model, Etc.       HSB Corporation 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 judgements and findings. Additional space Is' provided at the end of this cheCklist for documenting other comments. '
Anchorage
: 1. Is the anchorage configuration verification required (i.e, Is the Item one of the 50% of SWEL items requiring such          y verification)?
y
: 2. Is the anchorage free of bent. broken, missing or loose hardware?
No bent, broken. missing or loose hardware.
: 3. Is the anchorage free of corrosion that Is more than mild surface oxIdation?                                                 Y No corrosion observed.
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                    Y No cracks near the anchors.
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the item Is         Y one of the 50% for which an anchorage configuration verification Is required.)
The existing anchorage Is consistent with calculation D-21.7-1
; ( 6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?                   y Interaction Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                         y Potential soft target /s the stainless steel tubing entering the tank In two locations. No credible Interaction sources
: 8. Are overhead equipment, distribution systems. ceiling tiles, and lighting, and masonry block walls not likely to             Y collapse onto the equIpment?
Emergency lighting Is restrained by a cable and bracket, overhead lighting Is well supported, PA speaker Is anchored, no masonry walls
: 9. 00 attached lines have adequate fiexlblllty to avoid damage?
Y The attached air line feeding the diesel generator are threaded, but have multiple bends which provide flexibility.
The staInless steel tubing Is flexible.
: 10. Based on the above seismic Interaction evaluations,ls equipment free of potentially adverse seismic Interaction effects?                                                                                                                        y OtherAdverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safely function of the            Y equIpment?
Page lof9

Seismic Walkdo1Nl1 Checklist (SWC)                Status:   Y Equipment 10 No PC-2-21-M-TK-AB1A                              Equipment Class: 21 Equipment

== Description:==
PG No. 1 Air Start Receiver A Comment:
Evaluated by'       DKN/                  ~
                                             /"-1~~----J~-~~-' 0 " , /'2.0 (1-ORC 1O/17/Z0 It Page 2 of9

Seismic W8lkdolNn Checklist (SVVC)                                            Status:   Y Equipment ID No          PC 2-21 ..M-TK-AR3A w                                                                Equipment Class: 21 Equipment

== Description:==
pG No 3 Air Start BecejverA location:            Building: ~                            RoorEt 85                         Room, Area: 2-DEG-23 Manufacturer, model Etc.
Instructtons for Completing Checklist This checklist may be used to document the resuits of the Seismlb Watkdown of an item of equipment on the SWEl. The space below each of the following questions may be used to record the results of judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.
AD~boraqe
: 1. Is the anchorage configuration verification required (i.e, is the Item one of the 50% of SWEL Items requiring such          N verification)?
The veriical tank is anchored by four (4) 7/8" embedded anchors. The tank does not have an upper support.
: 2. Is the anchorage free of bent. broken, missing or loose hardware?
v y
: 3. Is the anchorage free of corrosion that is more than mild surface oxidation?
: 4. Is the anchorage free of visible ~racks in the concrete near the anchors?                                                   y Vel}' fine hairline crack in grout pad neaT one anchor b(Jlt. Judged not to affect anchor bolt capacity.
: 5. Is the anchorage configuration conSistent with plant documentation? (Note: This question only applies if the item is       N/A 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?                  y lateractlon Effects
: 7. Are soft targets free from impact by nearby eqUipment or structures?                                                        y Soft targets consist of small diameter $S tubing Which could cause the tank to vent If broken by falling Objects. No credibla seismic interaction sources were found.
: 8. Are overhead equipment, distribution systems. ceiling tiles, ~nd lighting, and masonry block walls not likely to            y collapse onto the equipment?
No masonry walls; lighting fixtures are positively restrained. Emergency lighting secured to walls through Unistrut members.
: 9. Do attached lines have adequate fleXIbility to avoid damage?
y All piping joints are we'ded.
: 10. Based on the above seismic interaction evaluations, Is equipment free of potentially adverse se1smic interaction effects?                                                                                                                       y Other Adveme CondJUons
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the           y equipment?
The .weld between the skirt and the lower tank head Is Joined by an Intermittent weld. The intermittent welds are 3-112 to 4" In length spaced about 12"apariand are Judged to be adequate.
Page lof10
                                                                                   .------~--.-.--~.---,--------

Seisnic WalkdolNll Cheddist (S\NC)                         Status:    y Equipment to No DC-2-21-M-TK-AR3A                                        Equipment Class:
Comment:
Equipment

== Description:==
DG No 3 Air Start RecejverA
                                    --    - --. -- . ~ - . -~- .*...*- ..   -_.
Evaluated by:
Page 2 of 10

Seismic Walkdown Checklist                          (SWC)
                                                                             --_....._-----------_._----               Status: y Equipment 10 No DC-2-21-P-FL-CAF1                                                            Equipment Class:      n Equipment

== Description:==
DG No 1 Inlet Air Filter Location:          Building:  ~                             FloorEI. M                      Room. Area: 2-pEG.21 Manufacturer, model, Etc.      paylson EQylpment Co 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 ludgements and findings. AdditIonal space Is provided at the end of this checklist for documenting other comments.           .
Anchorage
: 1. Is the anchorage configuration verification required (I.e, is the Item one of the 50% of SWEL items requiring such             N verification)?
y
: 2. Is the anchorage free of bent. broken. missing or loose hardware?
No bent, broken or missing hardware.
y
: 3. Is the anchorage free of corrosion that Is more than mild surface oxidation?
No corrosion observed.
: 4. Is the anchorage free of visible cracks in the concrete near the anchors?                                                      Y
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the item Is          N/A 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?                     y The filter Is connected to the inlet pipIng through a bolted flange connect/on with (10) 1-1/4*' bolts. A vertical pipe strut supports the piping Just downstream of the filter. The filter Is braced to the concrete slab above and to the adjacent concrete wall.
Interaction Effects
: 7. Are soft targets free from Impact by nearby eqUipment or structures?                                                           y No soft targets.
: 8. Are overhead equipment. distribution systems. ceiling tiles, and lighting, and masonry block walls not likely to               y collapse onto the equipment?
No credible Interaction sources
: 9. Do attached lines have adequate flexibility to avoid damage?
N/A
: 10. Based on the above seismic Interactfon evaluations, fs equipment free of potentially adverse sefsmlc Interaction effects?                                                                                                                          y Other Adyeru Conditions
: 11. Have you looked for and found no other seIsmic conditions that could adversely affect the safety function of the              Y equipment?
Page 1 of 2

Seismic WalkdollUl1 Checklist (SWC)                       Status:   Y Equipment 10 No DC-2~21-P-FL-CAF1                                     Equipment Class: !l Equipment

== Description:==
PG No. 1 Inlet Air Filter Comment:
Evaluated by;       DKN     1                    ~
_~\'+--~---I'~_--.:~---.:I (I , II  I'U> /1.-
ORC       ~Ja               loIn/lOlL Page 2 of 2

Seismic Walkdown Chedclist (9IIC)                                                    Status:    V Equipment 10 No DC-2-21 ..p-EL..CAF3                                                            Equipment Class:         n Equipment

== Description:==
DG No 3 Inlet Air EHter Location:           Building:  IYr.bioi                       FloorEI. &sect;.S                      Room. Area: 2-DEG-23 Manufacturer, model. Etc.        Paullin Egyipment Compiin~
Instructions for Completing Checklist.
This checklist may be used to document the results of the Seismic Wa'kdown of an item of equipment on the SWEL. The space betoweach of the following questions may be used to record the resul~ of judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.
AnchoragEt
: 1. Is the anchorage configuration verification required (i. e, is the item one of the 50% of SWEL items reqUiring such                 N Verification)?
y
: 2. Is the anchorage free of bent, broken. missing or loose hardware?
y
: 3. Is the anchorage free of corrosion that is more than mild surface oxrdation?
: 4. Is the anchorage free of visible cracks in the concrete near the anchors?                                                           v
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This queslion only applies if the item is               N/A 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?                          y Interaction Effects
: 7. Are soft target~ free from impact by nearby equipment or structures?                                                                y The filter cartridge Itself constitutes a soft target but there Is nothing above or to the side of the InTel filter that could fall and cause damage to the Inlet FIlter.                               .
: 8. Are overhead equipment, distribution systems. ceiling tiles, and lighting, and masonry block walls not likely to                    v conapse onto the equIpment?
: 9. Do attached lines have adequate flexibility to avoid damage?
N./A
: 10. Based on the above seismic interaction evaluati.ons, Is equipment free of potentially adverse seismIc interaction effects?                                                                                                                               y Other Adverse Conditions
: 11. Have YQu looked for and found no other seismic conditions that could adversely affect the safety functton ofthe                    y equipment?
Page lof11

Seismic Walkdown Checklist (S\N'C)                                                Status:      y Equipment 10 No pC*2*21-P-EL-CAE3                                                            Equipment Class: .Q Equipment

== Description:==
DG No 3 Inlet Air Eilter Comment:
The anchorage for the left strut In the "V" support sY$tem at the free end of the Inlet Air Filter could not be seell. If appears that the baseplate may be either welded or bolted to a horizontal steel column that Is then covered with fire protection Insulation blocklng the view of the baseplate anchorage.
(;valuatedby          ~ . &#xa3;~ ~ /-0';I~/~
KA A~~tL IV/a-:J-)'2- .
{
Page 2 of11

Seismic walkdolJVl1 Checklist (S\IVC)                                         Status:   Y Equipment 10 No DC:2 21-p-V-pEG-2-LCV-89 w                                                             EquIpment Class:   1 Equipment

== Description:==
PG No 1 Fuel Off Shutoff Valve Header A Location:         Building: Turbine                         FloorE!. M                    Room, Area:   2..DEG-21 Manufacturer, model, Etc.
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 th~ results of judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (i.e, Is the Item one of the 50% of SWEL Items requiring such         N
~~~~                                                                                          .
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
No bent, broken, or miSSing hardware.
y
: 3. Is the anchorage free of corrosion that is more than mild surface oxidation?
No Significant corrosion observed.
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                 NfA
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is      NfA 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?                 y Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                       y 3/8 Inch gap exists between the valve operator and the concrete trench wall to the northl pipe supports are located 3 ft to the east and 3.5ft to the west of the valve, pipe appears to be adequately supported and the pipe dIsplacements are expected to be sufficiently small such that the valve operator Is not expected to Impact the trench wall
: 8. Are overhead equipment. distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to           y collapse onto the equipment?
Valve sndplpe are located In 8 concrete trench with steel grating cover, so the valve Is protected.
: 9. 00 attached lines have adequate flexibility to avoid damage?
y
: 10. Based on the above seismIc Interaction evaluations, Is equipment free of potentially adverse seismic Interaction effects?                                                                                                                      y Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the          Y equipment?
Page 1 of6

Seismic WalkdolNl1 Checklist (SVVC)                                              Status:   y Equipment 10 No OC-2-21-P-V-pEG-2-LCV-89                                                          Equipment Class: Z EquIpment

== Description:==
PG No 1 Fuel Off Shutoff Valve Header A Comment:
2-LCV-89Is a line-mounted valve. The pipe Is located fn a trench In the concrete floor. The trench Is covered by steel grating that Is secured with set screws.
Evaluated by'       _O_tt----'-"-r----..::..~'=&#xa5;----=-.........!t..-- /0~I~ I~ I 'l.
ORC
                                             --t+-=-fl----"---\'O<-~-. /0/ nlzOIl               .
Page 2 of6

SeiSl1'ic WsIkdo\lUll Chedclist (S\VC)                                         Status:   Y Equipment ID No DCw2..21~P-VOA-DEG-2-LCV..87                                                    Equipment Class:   Z Equipment

== Description:==
pG  No. 3 Evel Off Shutoffyalva Heac:ter A Location:         Building:  ~                             Floor EI. B&sect;.                        Room, Area: 2-pEG-23 Man~cturer,     model, Etc. Anchor-Darling 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 judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (I.e, Is the item one of the 500J<, of SWEL items requiring such        N verification)?
Small valve with 8 small operator. The valve body (s bolted between pipe flanges fn pipe sections h~ving pipe flanges located wllhln 26 11 upstream and downstream of valve. The piping is laterally supported on both sides                Y within 33" of the valve.
: 2. Is the anChorage free of ben~, broken, missing or loose hardware?
y
: 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?                                                   y
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the item Is       NJA 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 selsm1c conditions?                  y Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                        y The valve Is protected by it's location under the DG Skid extension which supports the Jacket Water Cooler.
: 6. Are overhead eqUipment, distribution systems. ceiling tiles, and lighting, and masonry block walls not likely to           NlA collapse onto the equipment?
: 9. Do attached lines have adequate flexibility to avOid damage?
y
: 10. Based on the above seismic interaction evaluations, is eqUipment free of potentially adverse seismic interaction effects?                                                                                                                       y Qjher Adyerse Conditions
: 11. Have you looked for and found no other sefsmic conditions that could adv~rse'y affect the safety function of the           y equipment?
Page 1 of7

Seismic Walkdown Cheddist (SVVC)                     Status:    Y Equipment 10 No OC-2-21-P-VOA-DEG-2-LCV.87                       Equipment Class: I Equipment

== Description:==
DG No 3 Euel Off Shutoff Valve Header A Comment:
                                     ~ .~
Evaluated by:
KA
                                       -AO~h
                                                                                                    .I Page 2 of7

Seismic Wallcdo1Nn Checklist (SWC)                                               Status:    y Equipment 10 No PC-2*23-E-HT.2EH-29A                                                          Equipment Class:
Equipment

== Description:==
E!ost-LQCA Sampling Room Ventilation puct Heater No. 29A
-"'-'       -   .. -    --"-"         "._- -'.--"_.- ' - -..      --..  -'~' '. -.'-'- ,,-~, ---.-.... _..-... __ ." '_.- ,--_.-.-_._-,--
Location:           Building: ~                           Floor EI. .1Q.Q                     Room, Area: 2-HT-EH-29A Manufacturer. model, Etc.      Nutherm International Instructions for Comp teting. 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 r~sults of Judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.                         '
Ancborage
: 1. Is the anchorage configuration verification required (i.e. Is the Item one of the 50% of SWEL items requiring such              N verification)?
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
IIl*line.heater mounted between duct flanges. The heater Is duct-mounted with no separate support for the heater.
The duetlng appears to be adequately supported.                                                                                  y
: 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?                                                      N/A
: 5. Is the anchorage configuration c(jnsJslent with plant documentation? (Note: This question only applies If the item is          N/A one of the 50% for which an anchorage configuration verification Is required.)
a Bas4d on the above anchorage evaluations, Is the anchorage free of potentrally adverse seismic conditions?                       y
          ~
Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                            y No visible soft targets.
: 8. Are overhead equIpment. distribution systems. ceiling tiles. and lighting, and masonry block walls not likely to                y collapse onto the equipment?
Room lighting fixtures pose the only falling source and all are well anchored to the/ighting conduit runs.
: 9. Do attached lines have adequate flexibility to avoid damage?
y Flex conduit.
: 10. Based on the above seismic interaction evaluations, is equipment tee of potentially adverse seismic interaction effects?                                                                                                                           y Other Adverse Conditions
: 11. Have you looked for and found no other seismiC conditions that could adversely affect the safety function of the              y equipment?
Page 1 of14

Seismic Wallulown Cheddist (SWC)                                   Status:   Y Equipment 10 No OC-2-23-E-HT-2EH-29A                                            Equipment Class: Q Equipment

== Description:==
Post-lOCA Sampling Room Ventilation DUct Heater NQ 29A Comment:
Evaluated bY' l6>p&#xa5;/~~z.
IOI"JIOJf~
I pa ge20f14 /
I l

Seismic Walkd<wvn Cheddist (Q&#xa5;C)                                               Status:    Y Equipment 10 No DC-2-23-E..pNkCRC6                                                          Equipment Class:    2Q Equipment

== Description:==
Control Room Ventilation Control Cabinets Location:         Building: ~                              FloorE!. 1M                   Room. Area: 2-CR-37 Manufacturer. model, Etc.
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.judgements and findings. Additional space Is provided at the end of this chepknst for documenting other comments.               .
AnChorage
: 1. Is the anchorage configuration verification required {i.e, is the item one of the 50% of SWEL items requiring such          N verification)?
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
. Anchorage consists of (4) bolts with spring nuts to (2) horizontal Un/strut members that Bre in tum bolted to the concrete wall with (4) concrete ant;hors.
: 3. Is the anchorage free of corrosion that Is more than mild surface oxidation?
: 4. Is the ~nchorage free of vjsible cracks in the concrete near the anchors?                                                   y
: 5. Is the anchorage configuration consistent with plant dOCUmentation? (Note: This question only applies if the item is       N/A one of the 50% for which an anchorage configuration verification is required.)
: 6. Based on the above anchorage evaluations, is the anchorage free of potentia1ly adverse seismic conditions?                  y Interaction Effem
: 7. Are soft targets free from impact by nearby equipment or structures?                                                        y Afl nearby wall--mounled panels and junction boxes are well anchored.
: 8. Are overhead equipment, distribUtion systems, ceiling tiles, ~nd lighting. and masonry block walls not likely to           v collapse onto the equipment?
Overhead HVAC ducting has rigid frame supports rombined with rod hangers.
: 9. Do attached tines have adequate flexibility to avoid damage?
y All connections are class 1 supported rigId conduit.
: 10. Based on the above seismic Interaction evaluations, is equipment free of potentially adverse seismic interaction effects?                                                                                                                      y Other Adv8me Conditions
: 11. Have you looked for and found no other seismic conditions that coutd adversely affect the safety function of the          y equipment?
Page 1.of13

Seismic Walkd01lUl1 Checklist (S1NC)                  Status:    Y Equipment lO No DC-2-23-E-PNL-CRC6                                 Equipment Class: ZQ Equipment

== Description:==
Control Room Ventilation Control Cabinets Comment:
Evaluated by'                                 ~
                                                                         ~t')//~"2.6I2.-
10/18 (miL Page 2 of 13

Seismic walkdown Checklist (SWC)                                               Status:   Y Equipment 10 No        DC~2~23-E-PNL~PCCFC1                                                  Equipment Class: ..2.Q Equipment

== Description:==
CECU SIS and Auto Bys Transfer Relay Cabinet Bus F
                                                                                        ....    .......... ~ .. --------
Location:         Building: AYJillliJ:y                     FloorEI.      .tim               Room, Area: 2-PNL-ARP Manufacturer, model. Etc.
Instruct!o~s for C9mpJ~tln9 Chf;ilckllst
.. THIs-olfe-ckfisUnaybe 'mfe(ncfaoctlment lfiHEis'urts'of theS'eismlc'Walkdown of an item of e<lulpment on' the SWEL. The space below each of the following questions may be used to record the results of judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.
AnchoraGe
: 1. Is the anchorage configuration verification required (i.e, Is the Item one of the 50% of SWEL Items requiring such         y verifIcation)?
y.
: 2. Is the anchorage free of bent. broken, missing or loose hardware?
All anchor bolts are securely fastened.
y
: 3. Is the anchorage free of corrosion that Is more than mild surface oxidation?
No corrosion Is present.
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                  Y No crack$ are visible.
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is       Y one of the 50% for which an anchorage configuration verification Is requIred.)
(4) 112" anchor bolls at the base. Internal components are mounted on a plate with 4 anchor bolts.
: 6. Based on the above anchorage evaluationsj is the anchorage free of potentially adverse seismic conditions?                  y The frame Is braced laterally In-plane with the panel. The bottom of the panel has stiffener plates welded to the frame and the floor In the out.-o(-pJane direction of the panel.
Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                        Y All nearby cabinets and conduit are seismically restrained.
: 8. Are overhead equlpmentl distribution systems. ceiling tiles, and lighting, and masonry block walls not likely to            y collapse onto the equipment?
Block walls have been retrofitted with steel members which are anchored to the floor and to the ceiling.
: 9. Do attached lines have adequate flexibility to avoId damage?
y No Issues with attached lines.
: 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seIsmic Interaction effects?                                                                                                                       y Other AdvelJie Conditions
: 11. Have you looked for and found no other seismiC conditions that could adversely affect the safety function of the           Y equIpment?
Page 1 of8

Seismic walkdo\Nl1 Checklist (SWC)                               Status:   Y Equipment 10 No     DC~2-23-E-PNL-PCCEC1                                     Equipment Class: 2.Q.
Equipment

== Description:==
CFCU SIS and Ayto Bys Transfer Belay CabInet. Bus F Comment:
Evaluated by'     KTM
                                           ~~
SMM
                                            ~~
tr                       J6/18/d-.O\ d-Page 2of8

Seisnic Walkdovun Chedclist (SWC)                                             Status:   Y Equipment 10 No        DC~2*23-M-BC..CP~37                                                   Equipment Class:    12 Equipment

== Description:==
Control Room Ventilation Air Conditioning CompressQrs Location:         Building:  ~                             FloorEI. 1M                       Room, Area: 2*CP-37 Manufacturer, mOdel. Etc.      Ir.a.ml 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 judgements and findings. Additional space Is provided at the end of this checkUst for documenting other comments.
Anchorage
: 1. Is the anchorage configuration Verification required (i.e. is the Item one of the 50% of SWEL items requIring such         N verification)?
: 2. Is the anchorage free of bent. broken. missing Of loose hardware?
v The compressor unit is bolted to (2) transverse base channels by (4) 112" bolts. The heavy structural channel sections are In tum seoured to the floor slab by (4) 5/8'1 embedded anchors that have anchor plates at the bottom.          y 3.ls the anchorage free of'corro~ion that is more than mad surface oxidation?
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                  y
: 5. Is the anchorage configuration consistent With plant documentation? (Note: This question only applies if the item is      N/A one of the 50% for which an anchorage configuration verification Is required.)
Anchorage is consistent with drawfng 443333-1.
: 6. Based on the above anchorage evaluations. is the anchorage free of potentially adverse seismic conditions?                 y Interaction Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                       y Soft targets consist of velY small diameter copper tubing. However, the tubing is generally protected by the adjaoent control pane/and Its support frame.
: 8. Are overhead equipment. distribution systems. ceiling tiles, and lighting, and masonry block walls not likely to           y collapse onto the equipment?
OveThead conduit and fire water piping are well supported and an HVAC Fan and dueling are also well supported.
The reinforced masonry wall includes additions' support both at the base and the top.
: 9. Do attached lines have adequate flexibility to avoid damage?
y Both the eleotr/asl oonnections and the compressor Inlet and outlet nozzles inolude flexible sections.
: 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic Interaction effects?                                                                                                                      y Other Advemft Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the          Y equipment?
Page 10f 12

Seismic walkdolNl1 Checklist (SVVC)                              Status:    y Equipment ID No DC-2-23-M-8C-CP-37                                             Equipment Class:
Equipment

== Description:==
Control Room Ventilation Air Conditioning Compressors Comment:
Evaluated by; ft&#xa5;/
                                                                                      / .9      -2.8-1 "Z-lo118/~/0 Page 2of12

Seismic Walkdovun Checklist (SV\fC)                                              Status:   Y Equipment 10 No DC-2-23-M-BF-2E-l                                                           Equipment Class:      ~
Equipment

== Description:==
Aux Bldg Ventilation Exhaust Fans location:          Building: ~                             FloorEI. l!Q                      Room, Area:     2-BE-2E-1 Manufacturer, model, Etc.
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 judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (i.e, Is the item one of the 50% of SWElltems requiring such             N verification)?
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
All anchorage Is present and In good condition.
y
: 3. Is the anchorage free of corrosion that is more than mild surface oxidation?
Part of the fan skid and some anchor bolts at the bottom of the skid had minor surface corrosion. Backdrsft dampers have mild surface corrosion. No structura/lssues.                                                                     Y
: 4. Is the anchorage free of visible cracks in the concrete near the anchors?
No vIsIble cracks were seen.
: 5. Is the anchorage configuration consistent with plant documentation? (Note~ This question only applies If the item is         N/A 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?                     y No adverse seismic conditions were Identified.
Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                           y No credible sources were identified that could Impact soft targets.
: 8. Are overhead equipment. distributi                 ailing tiles, and lighting. and masonry block walls not likely to           y col/apse onto the equipment?          t:i c;k~~ 1PH I~fif:;/l~ K1'l"\. JlleloJl.~...
No overhead equipment, distrib tion s ems, ceiling tiles or lighting In the room. Lighting was rod hung with a ball and socket joint on one end and S*hook on the opposite end of the fixture. Seismic Interaction Is Judged to be Incapable of damaging equipment or soft targets.
: 9. Do attached lines have adequate flexibility to avoid damage?
y All attached lines use flexible conduit.
: 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?                                                                                                                          y No Issues were identified.
Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the              Y equipment?
Page 1 of 15

Seismic WalkdoV\ll1 Checklist (SWC)                Status:    Y Equipment 10 No OC-2-23-M-BF-2E-1                              Equipment Class: ~
Equipment

== Description:==
Aux. Bldg Ventilation Exhaust Fans Comment:
Evaluated by:
KTM~~                 ~ ,b/l SlJ-o\)..
SMM
                                             ~,R{5 Page 2 of 15

SeisIric walkdolM1 OIecIdist (SWC)                                             Status:    Y Equipment 10 No DC-2-23-M-BF-2E-4                                                             Equfpment Class: ~
Equipment

== Description:==
EHBYS Normal Exhaust Fan location:         Building:   ~                             FloorEI.    ~                    Room, Area:     2:IlEE!
Manufacturer. model. Etc.
Instructions for Completing Cl:lecklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEI.... The space below each of the folloWing questions may be used to record the rasuRs of judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.
An\iborage
: 1. Is the anchorage configuration verificatIon required (i.e, Is the Item one of the 50% of SWEL items requirIng such           N verification)?
y
: 2. Is the anchorage free of bent. broken. missing or loose hardware?
Belt-driven squirrel cage fan that Is bolted to a 6" I-beam frame by (3) 51B bolts on either side. The frame /s in tum IJ bolted to the concrete floor slab by (4) 5/8" embedded anchor bolts on either side and by (3) additional 5/8"                 y embedded bolts on the motor end The motor /s bolted to 8 motor base that Is welded to the base frame for the fan.
: 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?                                                    y
: 5. Is the anchorage config.ur$tion conSistent with plant documentation? (Note: This question only applies if the item is       N/A one of the 50% for whIch an anchorage configuration verification is required.)
: 6. Based on the above anchorage evaluations Is the anchorage free of potentially adverse seismic conditions?
l                                                                              y Interaction Eifecl$
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                         Y The only soft t~rgets for the fan consist of the electrfcallines and tubing connections for the fan actuator which is separately supported. The wal/-mounted HEPA flIters are adequately restrained.
: 8. Are overhead equipment. distribution systems. ceiling tiles, and lighting, and masonry block walls not likely to .           Y collapse onto the equIpment?
The ventilation ducting Is rigidly supported and a flexible connection exists between the fan and the exhaust
  ~uctjng. Room lighting Is either wall mounted or hung from the ceiling by pipe sections with ball and socket connections.
: 9. 00 attached lines have adequate flexibility to avoid damage?
y
: 10. Based on the above seismic Interaction evaluations, is eqUipment free of potentially adverse seismIc Interaction effects?                                                                                                                        y Qiber Adverse.Conditlons
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the            y equipment?                                                                               .
The overhead crane has been removed from the crane rail.
Page 1 of 15 I I

Seismic WalkdolNl1 Cheddist (SVVC)              Status:    Y Equipment 10 No DC-2-23-M-BF-2E-4                            Equrpment Class: H Equipment

== Description:==
FHBVS Normal Exhaust Fan Comment:
Eyalyated by'
                                                                   /~~&#xa5;/~JZ
                                                                   /0 118/101L-Page 2 of 15

Equipment 10 No OC-2-23-M-BF-2S-37                                                           Equipment Class:    10 Equipment

== Description:==
Control Room Ventilation Supply Fans localion:         Building: Auxiliary                      Floor EI. 154                     Room, Area:    2-CP-37 Manufacturer, model, Etc.       Trane 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 judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (Le, is the item one of the 50% of SWEl items requiring such             y verification)?                                                                                      .
y
: 2. Is the anchorage free of bent. broken, missing or loose hardware?
Unit is welded to stiffened channel sections that run along either side. The side channels are each bolted to the floorby (4) 112" embedded anchors. Additional support for the inlet-side extension is also provided.                           y
: 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 neaf the anchors?                                                      y
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is         NIA 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?
The vendor welds belween the base frame of the unit ,and the four sheet metal base angles is quite small in some xNj)U, ~
cases. The smallest welds are 1-112' long 1/8" fillet weld on the inside and a 1-11211 Jong 1116" effective seam weld on the outside, It was found that the as-buHtcalculation DHV~1.3 considered the welds as 1~518'llong 3/16"                    tlt~'rL "/vIP-effective welds at both ends. For disposition see Attachment 1.
Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                         y No visible soft targets. The molor for the belt-driven fan is mounted directly on the unit.
: 8. Are overhead equipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to              y collapse onto the equipment?
Conduit, piping. and room lighting well supported.
: 9. 00 attached lines have adequate flexibility to avoid damage?
y
: 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?                                                                                                                        y Flexible joints connect the fan to both the inlet and outlet-side dueling.
Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the            Y equipment?
Electrical connection to solenoid valve (VAC-2-SV-5020) on coil section is very weak and unsupported length of conduit to valve is relatively long. For disposition see Attachment 2.
Page lofiS

Status: -&#xa5;'
Equipment IJ) No IJC-2-23-M-B.F-2S-37                                                    Equipment Class;   1Q         .tJtItL H/"l.cI-rz..
I f;qulpment Description;    Control Room Ventilation Suo ply Fans Comment Incfudes Cooling Coif Unit DC-2-23-M*HX-C37 which is I(ltegral with the Fan Unit and supported /;Jy it.,
Evaluated by:                                                     ~
                                                                                          /C?/2.C    /z.o/   Z.                         I IO/Z}/IL-I Page 2 of is

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit &#xa3; Equipment No. DC-2-23-M-BF-28-37                                                                                         Attachment 1, Pagef of 3 Licensing Basis Evaluation Issue:
The weld size for the welded connection of the vendor-supplied fan unit to the skid is smaller than that considered in calculation no. DHV1-001.03 (See attached sketch). The calculation assumed a 3/1611 fillet weld on the verlicallegs of the two connection angles, but the as-found weld size is 1/811 on one angle and 1/16" on the other.
Evaluation:
Note: The same condition was also found on Unit 1 Fan No. S-35 (Ref. Notification No. 50511891).
The supply fan Design Class I and seismically qualified. The seismic evaluation of the connection angle (L 1-1/2x2x3/16) is documented on pages 54 through 61 of calculation no. DHV1-001.03.
The calculation was based on the original field walkdown, which indicated that the weld between the supply fan and connection angle is a 3/16" fillet weld, 1-1/2" long on both sides. The connection between the angle and base skid are 1/2" diameter bolt and a 3/16" fillet weld, 81t long.
The evaluation of the as-found condition, shown on page 3, indicates that the as-found condition has significant margin. Therefore, the as-found condition has no adverse effects on the seismic qualification of supply fan no. 8-37.
Recommendations:
- Revise calculation no. DHV1-001.03 to address the as-found weld configuration.
- Update applicable drawings to show as-built weld sizes.
Notification Required: Yes (50519443)
                 - -=P- =-W. :. .:. .H.!. . ~
                                            - _. L. .J~
                                                      ~~        . ; . :;:-/~<'. .~
                                                                                 ;. -:--.. .co-~    /O.. ~_
                                                                                                         ;. 11-:./_,/~T-_ _ _ __
                                                 . .~ :;. =. .~~
                                                               ~ o: . .:. R---_~ . ~.~~-!   ----,-o+-'I,~q--'l- '/~    - ~----
Evaluated by:                                                                                    ___
Reviewed by: --.:W:..:..':.R..:.:..;H:....--__

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit 6..
Z.
Equipment No. DC-2-23-M-BF-2S-37                                       Attachment.1, Page j of 3 Sketch of As-Found Weld Configuration
                                                            ~(,W

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit &#xa3;.
Equipment No. DC-2~23-M-BF~2S-37                                     Attachment 1, Page 3 of 3 Evaluation of As-Found Weld Configuration Weld between the angle and supply fan:
Weld size: fillet weld 1/8" (left) and 1/16" (right)
, Weld length: 1-1/2" on each side, Electrode: E60XX, 60 ksi Allowable: .707*(1/8 + 1/16)* 1.5x.3*60 = 3.58 kips The shear forces on the welds (see Sheet 60 of DHV-1.3)
Longitudinal: 1590 Ibs due to uplift Transverse: 985 Ibs due to EW seismic 1.59+0.985=2.575kps < 3.58'kips "OK"

Seismic Wa'lkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit &#xa3;.
Equipment No. OC-2-23-M-BF-2S-37                                                                                Attachment~, Page 1 of 1 Licensi"ng Basis Evaluation Issue:
The electrical conduit providing power to solenoid valve no. SV-5020 (located in th? cooling coil supply piping on the norlh side 'of Fan No. 2S-37, is not Well supported in the lateral ejirection.
Evaluation:
The valve (DC-2-23-I-SV-SV-5020) is Design Class I and is seismically qualified. The valve controls the flow of Freon through the cooling coils for the supply fan (see drawing no. 102023, sheet 16). The potential exists for the conduit to impose loading on the solenoid operator during a seismic event.
The instrumentation schematic for the valve .control (see drawing no. 102035, sheet 24H, coordinate E-240H) indicates that the valve control is "Energize to Open". Therefore, loss of power or damage to the solenoid operator could result in unintentional closure of the valve, and loss for Freon flow to the cooling coils.
However, the as-found installed condition is in accordance with the requirements of OCM T-8 (Design Class IE Electrical Raceway Supports) and Drawing No. 050029 (Notes, Symbols and Typical Details for Racew~y & Wires), which permits a maximum conduit cantilever length of 4 feet beyond the last support (dr.awing 050029, sheet 138, Note 41) (the actual cantilever length is 30.0" per field measurement) and requires the installation of flexible conduits (drawing 050029, sheet 10, Note 25)
(there is 7-1/2" of flexible conduit per field measurement) at all connections "to motors" and "instrument devices" (e.g., the solenoid-operated valve). Therefore, the installation is per the design requirements.
Recommendation:
Acceptable as-is.
Notification Required: No Evaluated by: _..:..:...;wr:..:..:.h_ _  ----r-'i&--f\-+
j~     +-H-~-~                 ~----l-d-'--IZ_ "3+-1..I-12""'-"-_ _ _ _ __
Reviewed by: __         DPL ___        - -f-t.l,L}l. IL. .-Lj{)Jj_,- Y-b~r-I\.J*,.o_ _ _ _ _'-r&deg;I_Z3-f-il_Z-___' _ _ _ _ _ _ __

Seismic WalkdolNll Checklist (SVVC)                                             status: y
    . I -----,-------------------------------------_._-
Equipment 10 No pC*2*23-M*BF.E 104        N Equipment Class:    .Q Equfpment

== Description:==
ASW pump GQmpartmaot EXhayst fans
                             -----'--'-"'"   ,------------------~
location;         Building:  ~                             FloorEI. :ll Manufacturer, modeJ, Etc.
Instructions for Completing. Checklist Thi~ ohecklist may be used 10 clocumEmt the'resulis of the Selsniio'Walkdown of an item of equipment on the SWEL. The space below each of the follow~ng questions may be used to reoord the results of judgements and findings. AdcUtional space is provided at the end of this checklist for documenting other comm~nts.
        ---'----.--.---.---:---------~-~--~~
I     Anchorage
: 1. Is lhe anchorage configuration verification requIred (i.e l Is the Item one of the 60% of SWEL. items requiring such         y I
I I
verification)?'                                                '
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
Bottom :3 anohor bolts are visible and apprHJr to be in good condition. Top 3 bolts a/so appear adequate.
y
: 3. Is the anchorage free or corrosion that Is more than mild surface o)ddatlon?
*1         No corrosIon Is visible on the botlom S anchors. Center anchor on top has mInor surace corrOSIon - no Impact to sin/clural capacity. Other two top anchors show no signs 01 corrosion.                                                       y
: 4. Is the anchorage free of visible cracks in the concrete near the anchors?
No cracks are visible near any of the B anchors.
I      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.)
y The top and bottom ancfJorage Is consistent with plant drawings.
It     6. Based on the above ~mchorage evaluations, Is the anohorage free of potentially adverse seismic oonditions?
No adverse conditions noted.
                                                                                                                                      , y
 !I     fnt4nactlon Effects I      7. Are,soft targets free from Impaot by nearby equipment or struotures?                                                         y No soft targets were seen.
: 8. Are overhead eqUipment, distribution systems, ceiling tiles, and lighting, and masonry block wans not likely to              y collapse onto the equipment?
I No block walls or overhead equipmenlln tIle area. The HVAC attached to the fan appears to be adequately secured. L,ght next to the fan could impact during a soismic event but it Is judged fl1at the impact would not have an adverse affect on tho funationality of the fan.
I      Q. 00 aUached lines have adequate flexibility to avoId damage?
 !                                                                                                                                      v
 !        The attached Ijne uses flexible conduit.
: 10. Based on the ~bove seismic interaction evaluations. Is equipment (ree of potentially adverse seismic .interaction effects?                                                                                                                        y No significant inieraGlion effects were IdenUfied.
Other Adverse CondItions
: 11. Have you looked for and found no othar seismic conditions that could adversely affect the safety funotion of the            Y equipment?
Page lof7

Seismic wa1kdown Checklist (SWC)                                         Status:    Y Equipment ID No DC~2-23*M-BF-E-104                                                   EquipmenlClass: !!
Equipment DescripUon:   ASW Pump CQmpartmant Exhaust Fans Comme.nt:
Bottom anchors Inspected visually an 8129/2012. Upper bolts inspect6d via remote video on ~/1012012.   .
Eyalyatedbyi         KTM. KA   ~~'---~lbt~r~r~-------I
                                                   -A.~~.""_J 0 1~2,../J2-*
SMM
                                          ~...II5=                                 I"/~/tz--
Page 2 of7

Seismic Walkdown Cheddi. (SVVC)                                                Status:    y Equipment JD No PC-2-23-M-BE-E-45                                                           Equipment Class: .1Q Equipment Desoription:       480-V Switchgear Ventilation Exhaust Fans .
location:        Building:   &OOllim!:                    FloorEI. ID                       Room, Area: 2-E-45 Manufaoturer, model, Eto. Joy TechnologIes Inc 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 beloweaoh of the following questions may be used to reoord the results of jUdgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anohorage conriguratlon verlfioation required (I.e, is the Item one of the 50% of SWEL Items requiring such          y verlfloation)?
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
No bent, broken, or missing hardware.
: 3. Is the anohorage free of corrosion that Is more than mild surface oxIdation?                                                Y Surface corrosion on the fan pedes/a/and anc/lor bolts. See AttaoiJment No. 1 for disposition.
: 4. Is the an~horage free of vIsible cracks In the concrete near the anchors?                                                    Y No crac/<s observed near the anchors.
: 6. Is the anchorage configuration consistent with plant documentation? (Nole: This question only applies If the Item Is         Y one of the 50% for which an anchorage configuration verification Is required.)
The anchorage Is consistent with drawing DC 6001884~231-2
: 6. Based on the ab~ve anchorage eval.uatlons, Is the anchorage free of potentially adverse seismio conditions?                  y Interaction Effects
: 7. Are soft targets free from Impact by nearby eqUipment or structures?                                                         Y No soft targets
: 8. Are overhead equipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to             y collapse onto the eqUipment?
No equipment li/<eJy to Impact the fan
: 9. 00 aUaohed lines have adequate flexibility to avoid damage?
The fan and the adjaoent duct are braced and anchored. No significant relalive displa~menls are expected.                    Y
: 10. Based on the above seismic Interaction evaluations, is equipment free of potentially adverse seismic Interaction effects?                                                                                                                        y Other Adverse CQndltlQD&sect;
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety funoUon of the             Y equipment?
Pa.ge 1 of 10

Seismic Walkdown Checklist (S\IVC) status: Y EqufpmenllD No        DC*2*23~M~BF-E-45 Equipment Class: 1Q Equipment

== Description:==
48QN Switchgear Ventilation Exhausl Fans Comment:
The fan Is cylindrical In shape and Is supported by two steel saddles. The saddles are mounted on a structural steel pedestal tbat Is anchored to the concrete roof slab by 8 bolls.
Walkdown review Includes backdraft damper DC-2-23-P-C-VAC-2-BDD-45 Surface corrosion on the fan pedestal and anchor bolls. Surface corrosion Is also present on the fan mounts, junction boxes, and flanges.                                          .
See Attachment No. 1 for disposition of corrosion on the linl<age, duoling; and damper associated with Fan 2-E45..
Evaluated by'      .Dr/.
Page 2 of 10

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit.&#xa3; Equipment No. DC-2-23-M-BF-E-4S                                                       Attachment 1, Page 1 of 1 Licensing Basis Evaluation Issue:
Coatings failure and surface corrosion was noted on the following components associated with Fan No. &#xa3;-45:
-linkage
-duoting
- damper
- base plates
- support st(1el Evah,Jation:
Visual examination indicates that this is surface corrosion, and will not impact the structural integrity of these HVAC system components at this time.
Recommendation:
The coatings/corrosion needs to be cleaned, inspected, and repaired.
Notification Required: Yes (50510140) ~
Evaluated by:    -~~~       l-. I-+--<-;'~------I<'r,-+-Il-~fif:- !f-~
                              ..;.,q
* l ____-
Reviewed by: ______    ~~~--~~Do7~~-------------IO+I-iZ~-'~----------------------
I

                                      , Seismic Walkdo\Nl1 Checklist (SVVC)                                             Status:    N Equipment ID No pC-2-23-M-Bf-S-33                                                           Equipment Class;  !!
Equipment Description;        Aux. Bldg Ventllatloo Supply Eana Location:          Building: ~                             FloorEI. .14Q                     Room, Area:  2-BES-33 I
      ~anufacturer. model, Etc. Buffa10 forge Company BL-AER9EOIL           ~~-11~87A2
 !    Instructions for Completing Checklist Thjs checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL The spaGe below each of the following questions may be used to record the results of judgements and findings. Additional space Is provided at t~e end of (his checldlst for documenting other comments.
Anchorage                                         ,
: 1. Is the anchorage config~ration verl~caUon required (I.e, is the Item one of the 50% of SWEL Items requiring such            N verification)?
N
: 2. Is lhe anchorage free of bent. broken. missing or loose hardware?
Sge question 3 notes,
: 3. Is the anchorage free of corrosIon that is more than mild surface oxidation?                                                N Fan skid is heavily corroded and Is causing the s/cld to uplift from tha concrete pedestals. See Attachment No. 2 for disposition.                                                                                                     .          N
: 4. Is the anchorage free of visible cracks In the concrete neartha anchors?
Cracks can be seen in the grout pad near one of the anohors where the s/{id is corrOded. The crack does not (JxtMd Into the concrete floor.
: 5. Is the anchorage configuration consistent with plant documentaHon? (Note: This question only applies If the Item Is        NfA one of the 50% for Which an anchorage configuration veriUoation Is required.)
(9) 5/8" anchor bolts were used for the fan and moior slc/ds.
: 6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismio oonditions?                  N See comments for questions 3 & 4.
   . Interaction Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                         y All 80ft targets have adequate clearance.
: 8. Are overhead equlpmen~'distributioil systems, ceiling tiles,.and lighting, and masonry block walls not likely to             y collapse onto the equipment?
ConduJland pipIng running over the fan are adequately supported. Fluorescent Jlghtsln 8(68 have positive ancilorage (no S*hooks). No ceiling tiles or block walls In the area.
: 9. Do aUached lines have adequate flexibllily to avoid damage?
y Flexible conduit run Into the fan motor.
: 10. Based on the above seismic interaction evaluations, Is equipment free of potentially adverse seismic interaction effects?                                                                                                                        y Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety runctlon of the            y equipment?
Anchor-bolts for fan belt show mild corrosion. Judged not to have an adverse effeot due to the small weight of the fan /Jelf. See Attachment No. 1 for disposition.
Page 1 of 12

Seismic'Walkdo1Nl1 Checklist (SWC)                   Status:    N Equipment 10 No DC=2..23..M..BE..S.33                           Equipment Class: .f!
Equipment

== Description:==
Aux. Bldg Ventilation Supply Fans
., comment:
.,                      Evaluated by'        KTM                 . Date:
I 1
                                                 ~_. ~                   to/~3/~\~-"-'
Page 2 of 12 I
I

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit..&#xa3; Equipment No. DC-2-23-M~BF*S-33                                                                      Attachment 1, Page 1 of*1 Licensing Basis Evaluation Issue:
Corrosion was noted on the anchor bolts for the fan belt guard shroud.
Evaluation:
These anchor bolts are for the vertical dead load supports of the protective shroud around the belt between the motor and the fan. This shroud is a personnel protective device to prevent inadvertent contact with the rotating fan motor and belt; it serves no safety-related function. There is adequate anchorage of the shroud to the fan housing, and these vertical legs are provided only for dead load support of the shroud .- there are essentially no vertical or horizontal loads on these anchors.
Therefore, the corrosion on these anchor bolts does not impact the operability of fan 8-33. .
Therefore, this condition does not impact the operation of DCPP, but the anchor bolts should be replaced and the baseplate repainted.
Notification Required: Yes (50509028)
Evaluated by: _ _       ---.~~:...a....&..l~~~~----"'I-+i>I..c..~~Ht'-l-~~----------
Reviewed by: _ _ _       -:;;~~~.~...;;.:;".,;~~"""""==:...=.-..,....".~===--*L-o-li..;;;~;....::~~f..l..'lIL-=:;.-(--------_ __

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit 2-Equipment No. DC-2-23-M-BF-S-33                                                        Attachment,2, Page 1 of 1 Licensing Basis Evaluation Issue:
The fan mounting skid is heavily corrode d,_which is causing the steel beam to  ilft upwards from the concrete, and there is cracking of the grout pad.
Evaluation:
This condition represents severe degradation of the skid and anchorage which cannot be justified as acceptabie in its current condition and may not be able to perform its intended function Notification documents condition, but additional investigation required to address functionality.
Reviewed   by:                                                ~n ~
(
I
{

Seismic Walkdovun Cheddist (SWC)                                               Status: y Equipment 10 No DC-2-23-M-BF..S-45                                                           Equipment Class:   i EquIpment

== Description:==
480*Y Switchgear Ventilation SupplY Fans I.ocation:        Building:  ~                            FloorEI. lea                       Room, Area:  ~
Manufacturer, model, Etc.      Joy Technofogles Inc 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 Judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (i.e. Is the Item one of the 50% of SWEL Items requIring such         N Verification)?
y
: 2. Is the anchorage free of bant, broken, missing or loose hardware?
No bent, missing, or broken hardware.
y
: 3. Is the anchorage free of corr~slon that Is more than mild surface oxidation?
    $udace corrosion was observed on the fan mounts, dueling, baseplates, top of damper housIng, pedesta~ end anchor bolts. See Attachment No.1 fordisposltlon.                                                                          y
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?
No cracks obselVsd near the anchors.
: 6. Is the anchorage configuration consistent with plant documentatIon? (Note: This question only appiles if the item is       N/A one of the 60% for which an anchorage configuration Verification Is required.)
6, Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?                  y Interaction Effects
: 7. Are soft targets free from Impact by nearby equIpment or struolures?                                                        y No soft targets
: 8. Are overhead eqUipment. distribution systems. ceiling tiles. and lighting, and masonry bIQck walls not likely to            y collapse onto the equipment?
No credible In {eracUon sources. The adjacent duots are well supported.
: 9. Do attached lines have adequate flexibility to avoid damage?
y The electrical power cable has a flex connect/on, The fan and ducls have stiff supports. No significant relalive displacement Is expected.
: 10. Based on the above seismic InteracUon evaluations, Is equipment free of potentially adverse seismic Interaction effects?                                                                                                                      y Other Adver,@ Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the          Y equipment?
Page lof8

Seismic Walkdovun Cheddist (SWC)                                           Status:   Y
                                                                                       . EquIpment Class:   i Equipment

== Description:==
480-Y Switchgear VentUa<<on SYRPIy Fans Comment:
2-8-45 is 8 cylindrically shaped fan that Is supported by two steel saddles. The saddlas are mounted on a structural sleBI pedestal which is anchored 10 the concrete roof slab with 8 anchor bolts.
D~r                       ~
Evaluated by:
(o:j'2+/ZOYL lofZ~/JV Page 2of8

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit..&#xa3; Equipment No. DC-2-23-M-BF-S-45                                                        Attachment 1, Page 1 of 1 Licensing Basis Evaluation Issue:
Coatings failure and surface corrosion Was noted on the following components assoc.iated with Fan No. S-45:
-linkage
-dueling
- damper
- base p/{3tes
- anchor bolts
- support steel Evaluation:
Visual examination indicates that this is surface corrosion, and will not impact the structural integrity of these HVAC system components at this time.
Recommendation:
The coatings/corrosion needs to be cleaned, inspected, and repaired.
Notification Required: Yes (50510141)
Evaluated by:   -~U?==      -=---7't
                            . I-f-t'-n::-/\.~~   ~.       _---L.
q
                                                                        ' ----=-4
                                                                           %     )~
Reviewed by: _ _ _ _    -i~~UL---"--~;w..~_b'_'''"''_-'I;,~--------'-{)r_llL~/...:....rL---------
I     I

                                           ~is~iC WalkdolNn. Checklist (S\I\IC)                                          ,    Status: Y Equipment 10 N9 DC~2-23-rvr"HX":C~37                                                            Equ!pment Class:      1,0 Eq4ipm~nt Desc~ption:          Control,Room V~ntjlaUQn Air Condiiioni.ng pqnd~nserS Loc~tion:           Building: ~                               FloorEJ.    ~                     Rp~li). Area:   2.-qR-37 Manufacturer, motteJ, Etc.        Trane Instructions for Completing Checklist This cl1ecklist may p~ uf/ed to document th~ results of th~ -Seismic Waf~~owil of an (tern of eql!lpmer:tl on the SWEL. The space below ~ac*h cif th~ foll9Wlng qua~tions may be used to record th~ results of Judgements and findings: Additional space Is prQvided at the end of this checklist for doCumenting other corom~nts *.
Anchgrage
: 1. Is the anchorage confi9l!ration verification required (I.e, fs the item one of thf} 50% of SWEL items requiring such             Y verification)?                                                                                                       .
y
   .2. Is the ~nohor~ge free of bent, broken! mIssing or [OQse hardwar~?
      .The unit I~ ~olted to :(4) base sfru.cturel channel mem~els by (4) 1/2" bolts (1 at eaoh comer of the main ~eGtion).
Tnf$ tilPpflars to be tba weak point In the anchorag~ load p~tb. Each of the *stiffened support channels Is bo/(ed to            y the raIsed ~onOJT?te pad bY. (2) 1/~" bolts (8 total). The Inlet extension /Jas an apditional support at the two comers that prollide verf.ical and lateral restraint These are welded to the embedded angle (rame thafenvefopes the raised pad.
 , 3. Is the anchorage free of corrosion that is more thanmHd surface oxidation?
Moderate level of surface corrosion all arouhd base of unit as well as .the anchor bolts. "(/I.e pneumatic aotuaiors as well as the cppp'er tubing and brazed copper pipe are a/so moq~ra(e/y c.6rroded. For disposiilbn see Attaohment 2.               y There Is heavy corrosion on th~ unit skid. For disposition see Att~cJjment :t i                                       ~
: 4. Is the anchorage free of vislble cracks in the ~o1)crete ~ear the anchors?
: 5. Is the anchorage configu(aUon consis~el1t with plant documentation? (Note.: This questIon only applies If the item r~            y one of the 50% for which an anchorage configuration verrtication is required.)                 -
AnG/~orage is consistent with drawing 448333.1.
: 6. Based on the abOVe anchorage evaluations, Is the anchorage fr~e of potentially a~verse seismic conditions?                       y Int~raction    Effects 7~ ArEfsoff targets ffee-fromlmpa~t by,nearby equipment or struc~utes?                                                              y Soft targets limited to* ,small "diameter copper tubing and* all overhead Items appear to be adeqUately anohored
: 8. ArfiJ 9Y~rh~~d ec{Ulpment, distribution s:ystems. (fellll'lg tilijs, and ~ghtln9..and masonry block walls nOlJikely,to           y
  .collapse onto the equIpment?                                . '                    .
Room Iightil)gsl!Pported by pipe secf{tms With ball and soeMt cpnnection$. or In one case closed hook. All Ilave safely *ch.l!ins for add/llanal protection. R~(nforf1ed m~$c;mry wall forming West wall of room h~s tJdditlonal support at both tqe b.ase ant! tft~ top. Conduit and pipe in room Is well supported.                                  .
: 9. Do attached lines have adequ~te.fleXibilio/ to avoid damafJe?
y FJe'flple f1o~e connectIons at alE c;onnecflons t6 unit.
: 10. Based on the abOVE) ~f}ismic int~(actlOri eV~luationst is equipment free of potentl~ny adv~rse sefsmfc interaction effects?                                            . .                                                                             y
  ~th.r AdVerse COnd*illonS
'11.* HaVe yoU to~ke,d fOJ and fOllner-no Qther seismfc colldilion$ ~hat cq~14 adversely atrect the safety fun cHon of the            Y equipment?                                                                  '

Seismic Walkdown Checklist (SWC)                                  Status:   Y Equipment ID No DC-2-23-M-HX-CR37                                              Equipment Class: 10 Equipment

== Description:==
Control Roarp Ventilation Air Conditioning Condensers
-Comment:
Evaluat~d by:
P~ge  2of22

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit &#xa3; Equipment No. DC-2-23-M-HX-CR37                                                         Attachment 1t Page 1 of 1 Licensing Basis Evaluation Issue:
Corrosion was found at the bottom door frame of the filter section of Unit 2 Condenser CR37.
Evaluation:
The corroded section was found at the bottom of the north side door frame of the filter section. The.
corrosion Is about 4.5ft long. The filter section onry houses light weight filters. The corroded section does not support any heavy components, such condenser tubing or a* motor. Therefore, the corrosion has no adverse effect on the structural integrity of eR37. The seismic evaluation of Condenser eR37 remains valid and the condenser remains capable of performing Its Intended design fUnction.
Recommendation:
Repair/replace housing material and recoat.
Notification Required: Yes (50519813).
Evaluated by:  --~~~~~."""I.I~1---P"-~~---{_O~/z........;:.~/-(L.~._ _ _ _ _---.;..__
Re~ewedby: ___________-Jt~~~~---~I~~      ____---------IO+F-3~b-~------------------------

Seismic Walkdown Checklist (SWC)-
Dia~lo Canyon P?wer Plant, Unit 2-Equipment No. DC-2-23-M-HX-CR37                                                                            Attachme~t ~I       Page 1 of 1
_Licensing Basis Evaluation
**Issue:
Moderate surface corrosion was found on the. pneumatio actuators and associated copper tubing for the condenser unit.                                                 .
. Evaluation:
The corrosion is confined to the surfaoe of these components at this time, with no impact on their struotural Integrity. These 'components are capable of performing their intended design functions in their current oondition.
Recommendation:
Clean, prepare and reeoat these components.
Notification Req!1ired: Yes (50519823).
Evaluated by:    - -=D~R:=. .C  _______
Reviewed by: _..,loI;;W:..$J&ttLt...1-_ _ _ _ _
                                                   - -(}!)_J.}J#t.
                                                         -x~__
:-" -}_{l_*--I:l1&#xa3;i:~~._;....
                                                                    ~_-l_.-+-_~I{)"-_.I_\Ztj;.).~-{)-,(.,----
                                                                                                - I\1-'-'~ 3  W---!..,----=L=---_ _
                                                                                                            +-1

Seismic Walkdown Checklist (sv.tC)                                            Status:   N Equipment ID No OC-2-23-P-O-VAC-2-FCV-5045                                                 Equipment Class:     Z Equipment

== Description:==
A8Q.V Switchgear Ventilation Shutoff (plscharge) Dampers location:         Building: ~                            FloorEI.     ~                    Room, Area:    ~
Manufacturer, model, Eto. Qyality Air oeslgo damper Asco actuator Instructions for Completfng Checklist This checklist may be used to document the resuits 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 Judgements and findings, Additional space Is provided at the end of this checklist for documenting other comments.
AnchQrage
: 1. Is the anchorage configuration verificatlon required (Le, is the item one of the 60% of SWEL items requiring such          N verlfioation)?
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
No bent, bro/cen, or missing hardware.
: 3. Is the anchorage free of corrosion that Is more than mild surface oxidation?                                              N Mild to slgnifioant corrosIon on the actustor steel support aotuator, damper lop plate, Bnd damper flange bolts. See Attachment No. 1 for disposition.                                                                                         N/A
: 4. Is the anchorage free of vIsible cracks In the concrete near the anohors?
The damper Is mounted In line.
: 5. Is the anchorage configuraUon consistent with plant documentation? (Note: This question only applies if the Item Is       N/A one of the 60% for which an anchorage configuration verification Is required.)
: 6. Based on the above anohorage evaluations, Is the anohorage free of potentially adverse seismic conditions?                 y The damper Is seclIrely mounted to the fan and duct.
Interaction Effects
: 7. Are soft targets free from Impaot by nearby equipment or structures?                                                       y No credible interscllon pourC8S
: 8. Are overhead equipment. disfrlbutlon systems, ceiling tiles, and lighting, and masonry block walls not likely to           y col/apse onto the equipment?
Conduit and duct Is well supported. The adjacent steel ladder Is adequately anohored to the concrete stair well wall.
: 9. Do attached lines have adequate flexibltity to avoId damage?
The power cable has 8 flex connection.                                                                                     Y
: 10. Based on the above selsmlo interaotion evaluations, is equipment free of potentially adverse seismlo Interaction effects?                                                                                                                      Y Otber Adyerse Conditions
: 11. Have you looked for and found no other seismIc conditions that eQuid adversely affect the safety function of the          Y equipment?                                                                            '
Pagelof9

Seismic WalkdolNn Checklist (SWC)                                            status:      N
     -------------------------------------------------------------------~
Equipment 10 No OC-2-23~P-D-VAC-2-ECV-5045                                              EquIpment Class:    Z Equipment DescriptIon:    48Q-Y Switchgear Ventilation Shytoff (DIscharge) pampers Comment:
The damper /s line mounted between fan 2-S-45 and duotlng. 80th the fen and ductlng ore flgfdly supporled.
See Attachment No. 1 (or disposiUon of the corrosion on the supporting steal l;nkag6, duoting. damper, base plate, and top plate of the damper.
Evaluated by'        OKN"''''~                                    ~
                                              -(~'-W----=:"II\-F-------=~_I fl/1..4-!t,c>{ '2 ORe lo{t*t Page 20f9 II**

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit..&#xa3; Equipment No. DC-2-23~P-D-VAC-2-FCV-5045                                                                    Attachment 1, Page 1 of 1 Licensing Basis Evaluation Issue:
Surface corrosion was noted on the following components associated with Damper No. FCV-5045:
- actuator steel support
- actuator
- damper top plate
- damper flange bolts Evaluation:
The conditions as noted do not affect seismic qualification of the component to perform its function based on the current inspections.
Recommendation:
The coatings/corrosion needs to be cleaned, inspected, and repaired.
Notification Required: Yes (50510117)
Evaluated by:  ---=--=~~~---'-x-~-+t-7r  . ~ ", " " '-"~~_~                              q I--=zz~   l~ J?--_ __
Reviewed by: _ _    ----11_..J..lrcl-"'-a--=-K....:....-..;.;{0~~~--------.L.::::,D+'I7.Wl;L.:.rl....L'
( (
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1JU N
Status:  ..l(-
Equipment 10 No DC-2-23-P-D-VAC-2-MOO-10                                                  Equipment Class:     fi Equipment

== Description:==
Control Room Ventilation Supply Fan Discharge Dampers Location:        Building: Auxiliary                    Floor EL 154                      Room, Area: 2-CR-37 Manufacturer, model, Etc.      Barber Colman Electric Actuator
-~--------   -------
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 judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.
Anchorage 1.ls the anchorage configuration verification required (Le, is the item one of the 50% of SVIJEL items requiring such          N verification)?
The damper duct and actuator support frame are supporte,d off the ffoOI:
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
y
: 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?                                                   y
: 5. Is the anchorage configuration consistent with plant documentation? (Note; This question only applies jf the item is       N/A one of the 50% for which an anchorage configuration verification is required.)
Actuator support frame and actuator mounting Is consistent with drawing 513521-1.
: 6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?                  y Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                        y
: 8. Are overhead equipment, distribution systems, ceiling tiles, and lighting. and masonry block walls not likely to            y collapse onto the equipment?
: 9. Do attached lines have adequate flexibility to avoid damage?
y
: 10. Based on the above seismic interaction evaluations, is equipment free of potentially adVerse seismic interaction effects?                                                                                                                        y Other Adyerse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the eqUipment?
Veil' heavy unsupported channel stiffeners both top and bottom add substantial weight to the system which is cantilevered off the connecting duct. For disposition see Attachment 1.
Page 1 of 8

N~
                                                                                                  .Status:   ;>f- II/~/""" I Equipment Class: !l Equipment

== Description:==
GQntroJ Room Ventilation SupblyEan Dischara.e. Damoers Comment:
Evaluated by:                                              Date:
liP/Z~/ZoIZ.
IO{V[Ic, j I I
j I
1 J
Page 2 of8

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit.&#xa3; Equipment No. DC-2-23-P-D-VAC-2-MOD-1 0                     Attachment 1             Page 1 of 18 licensIng Basis Evaluation Issue:
Motor Operated Damper DC-2-23-P*O-VAC-2-MOD-1 0 was modified by adding structural steel channel stiffeners (approximately 19# per linear foot) on the top and bottom of the damper. The channel sections also extend to and stiffen the damper immediately adjacent to MOD-10 (DC-2-23-P-D-VAC-2-MOD-10A).
Reference PG&E Drawing 59353 for a layout of the dampers. The concern Is that the heavy channel stiffeners may adversely Impact the seismIc qualification of the ductinglduct supports associated with the MOD Dampers.
Evaluation:
A review of the seismic calculation for the ducting/duct supports assocIated with the MOD Dampers (Calculation HV-86, Revision 0) shows that the additional mass from the channel sections was not considered in the qualification of the dueting/duct supports. A eopy of this calculation has been revised (marked up) such that it now accounts for this extra mass. This markup Is found under sheets 2 thru 18. The mark up demonstrates that the duetlng/duct supports would remain seismically qualified (with significant margin) if the additional mass from the channel stiffeners is considered.
Therefore, this condition has no impact on the operation of DCPP.
Recommendation:
CalculatIon HV-86 will require formal revision to account for the additional mass from the channel stiffeners.
Notification Required: Yes (5051jj99:      Q0 Evaluated by:       !2 a.c.         _l        ![l/\/\                        10/tZ.f~{)fZ..
Reviewed by:         W(1..\--\      LDtL~ & stf,.,R                          \\) 2"Z.b 1

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Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit.&#xa3; Equipment No. DC-2-23-P-D-VAC-2-MOO-10           Attachment 1                 Page 4 of 18 C!
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Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit..&#xa3; Equipment No. DC-2-23-P-D-VAC-2-MOD-10           Attachment J.           Page 6 of 18
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Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant l Unit...&#xa3; equipment No. DC-2-23-P-D-VAC-2-MOO-10                  Attachment 1     Page 17 of 18
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At t.O Apply Sejwjcand Dead Lgpto Dw;t                   A tt.2.bA.-aal Bucld"ms: (See Sbeet 9 o(HV:4)                t == 5.0 +12(O.0359XU6 -O.03591l)! +5.91(2.0 + 0.0359           C')
Check 70" x 20" Rectangular Duct (SpanS 5 and 6)                                                                      -1.861:::; 6.64                                                 N I
fa = PIA. wa A. ... 2(h+w)t                                                                                                  N vertical Load                                                                    =2(10 + 20)0.0359                    It is about 5.0 into by engineeringjudgement                    wI Shean'" O.17S11.27)(3.10} ==    (l.r                                             =6.46in=                             bs -= 12 or l/2j                                                -0 Torsional == 0                                           f..:= 0.7/6.46= 0.11 hi < l.6Ft. ok                          )'1 =2.0 in by enginec:ringjudgmmt                                I My =: 2.15 w(1.l1)(3.10)= &.46 W                                                                                       __ UOte't2+S.!l6(2.0+0.03S9) =1.86 0I (J)
Ra$rWestLoad A 12,0 AtlPtv'Presswt Loads to J)u$                           F          5.96+12....
                                                                                                                                                                                      ~                (1)
Axial P== 0.178'(1.21)(3.10) =0.1' ShcarY=O
                                                          ~   .= 30000(O.O:JS9)
Fe         2.52 i   seooo* (.L 2900000() 1.
                                                                                                  .L) =0 7961csi ojo ~
* s, .. 6.64(3.9+0.03S9-1.86)=- 13.79
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Mz=o                                                     Pwr=Py+P,,+P!""o.o92+o.<ll 14 + O.03S9 = O.l3S7 psi          beodirlg'stress oIUtiifmer                                     s:      0 f,.,r=Mc.lS s := 1.959113.19"" 0.142 k.si < 0.96 F,. ... 28.8  0       or g:
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North South Load                                                                                                                                                                      c
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f,.a >= PPMrF.JPye = 0.133'1(30.000)10.796 "" SA l1csi       ksiok                                                             J 0
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Shear Y =0.I7st(1.27)(l.2O} = O.S'K.                     A ]$ 0 Check DuctSqesses                                                                                                     0      (')
 ~=2.1Silloa:(1~).6.0 iIIoII:                                                                                                                                                                 $1)
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::::l S.4t + 0.756 + 2.42 - 8.59 ksi < 18.80 k.si                                                                                        '<
0 By comparison.lbt m~ crilica1 eombinalioc load 'WiD be .
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if =' 0.49 ... 0.099 = 5.89 ksi ok (i.~ < 17.4 ksJ')
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Sz == 1015.044110 ... 101.5 in'                          A 14.9 Apply Pressure I..<<lds (See ATSC ~ for angle and                                                                      ~
Q)      '"0     :::r s,. - 89.897135 =2S7 in'                                 cbannel prgperti&sect;)                                                                                                           0
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 ~=   &,461101.5 +6JJI2.SI = 2.42 ksi                     LIxlx1J8" and Me 8xlt.7                                                                                                      3 CD     C        25.:
A n.to. Shq$1r&sect;                                          fl'Ml' =M_IS. <0.96 Fy
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Ary =2(70)0.0359 = 5.03 iif                              Stiffener we: MC8x18.7 atop two angles. (above and
_~ -2(20)0.0359 -1.44 in%                                 below dnc:ting).                                                                                                                   I'" ...-...
(J) f,y =0.1K/1.44 + 0= 0.49 ksi
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fn =0.5KI5.03 + 0 0.099 bi Maa=
f               =(3-24 1-ro:)o.l387(24W -195911-in 3
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A 11.2.a A.xi!J Stresse&                                 8,= f,(h.+t- J)                                                                                                            co
 ,=   PlAt =!J.7/O.926- C.7S6 ksi wheR; 11;.... height ofcomposite stifi'em.er= 1" +:29' =3.9" t=O.03S9" (I)
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(XI

SeismIc Wallcdo\\fl Checklist (SWC)                                           Status:    y Equipment 10 No PC-2-23-P-P-VAC-2-M0P:9                                                      Equipment Class:
Equipment

== Description:==
Control Room Veotilati'go Sygpt~ fan Suction Dampers Location:         Building: ~                              AoorEt. 1M                    Room. Area: 2-CR-37 Manufacturer. model. Etc.      J;larber Colman electric Actuator 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 Judgements and findIngs. Additional space is provided at the end of thIs checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (i.e, is the item one of the 50% of SWEL items requiring such           N verification)?
y
: 2. Is the anchorage free of bent, broken. missing or loose hardware?
: 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?                                                   y
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is       NlA one of the 60% for which an anchorage configuration verification is required.)
Actuator support frame and actuator anchorage is consistent with drawing 515850-1.
: 6. Based on the above anchorage evaluations. is the anchorage free of potentially adverse seismic conditions?                  y Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                        y Overhead items consist of conduit and 8 copper pipe that are well supported.
: 8. Are overhead equipment. distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to            y collapse onto the equipment?
Nearby room Oghtlng fixture Is restrained by (2) rods with ball and socket connections to the cel1ing.
: 9. Do attached lines haVe adequate flexibmty to avoid damage?
y
: 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?                                                                                                                       y Qther Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the           Y equipment?
Page 1 of 14

Seismic Walkdown Cheddist (SWC)                                                   Status:    Y Equipment 10 No DC..2-23-P-D-VAC-2-MOO-9                                                         Equipment Class:   !!
Equipment

== Description:==
Control Room VentilaUon Supply Fan Suction Dampers Comment:
pamper system consists of an in-line rectangular damper plus a separately supported actuator. The dueling has an insulating cover and the connection dueVdamper connection could not be seen. However, the damper appears to be well restrained I" the duct. The ducling below the damper is secured to the floor while the ducting above the damper is supported from the ceilingThe separ~tely mounted damper actuator is bolted by (3) 3116"*bolls threaded into a plate that is welded to a Un/strut frame that Is bolted to the ceiling. The Unistrut frame is braced in both horizontal directions. The acttiator and damper mechanisms are connected by an approximately 5116" diameter rod that is about 4' ln length. It appears that the flexibility of the rod is sufficient to accommodate the relative horizontal displacement of the floor at 154' and the ceiling at 163' which based on Hosgri DCM C-28, is less than 0.02" Evaluated bY'                                                            pate'
                                                                                                      /&J~&#xa5;/,~n-
                                                                                                         /0/ J8/lbll.-
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Page 2 of 14

Seismic WalkdOlM1 Chedclist (SVtfC)                                              Status: N Equipment lD No OC..2~23~P-FL-FU41                                                           Equlpment Class: jj!
EquIpment

== Description:==
Control Room VantUation Filter Unit
--~-----                    -..- -.... -,--~--------------.--------~----~--
Location:          Buildrng:  ~                             FloorEI.    .1M                   Room. Area: ~
Manufacturer, model. Etc.
Instructions for Completing Checklist
                                                                -------~---------                                   ... ----..........---
This checldist may be used to document the results of the Seism1c Walkdown of an item of equipment on the SWEL. Th~ space below each of the following questions may be used to record the results of judgements and findings. Additional space Is provided at the end of this checklist ror documenting other comments.
Aucborags
: 1. Is the anchorage configuration verification required (i.e. is the Item one of the 50% of SWEL items reqUiring such               y verification)?
y
: 2. Is the anchorage free of bent, broken, miSSing or loose hardware?
F/7ter unit Is anchored by (4) 11211 embedded anchors on either side (8 total).
: 3. Is the anchorage free of corrOSion that is more than mild surface oxidation?
y
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                         y
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the Item Is              N one of the 50% for whIch an anchorage configuration Verification Is required.)
DrawIng 443333-1 Indicates that the anchor bolts should be 5/8" in diameter. Cslculation D~HVAC-5.11ft1 calculates anchor bolt stress based on 1/211 anchor bolts. Because of the location of the weld between the channel flange and the I*beam flange the load path for vert/caf loads and side..f6-slde overturning forces Is not directly through the axes of the members creating rotational moments. HOWever, the referenced calculation applies the loads properly. For dispOSition see Attachment 1.
: 6. Based on the above anchorage evafuations. Is the anchorage free of potentially adverse Seismic conditions?                       y Interaction Effects
: 7. Are soft targets free from impact by nearby eqUipment or structures?                                                             y Only soft targets are short runs of small diameter copper tubing located on one side of the filter unit. A nearby room lighting fixture appears to be the only credible falling source but It is supported by pipe section with ball and SOO/(9t connection.
S. Are overhead equIpment, distribution systems, celling tiles. and lighting. and masonry block walls not likely to                 y collapse onto the equipment?
Overhead conduit, fire water piping, andJunction boxes ere well supported. Reinforc.ed masonry wan has additional support both at tile base and the top.
: 9. Do attached Jines have adequate flexibility to avoid damage?
y
: 10. Based on the above seismic Interaction evaluations, Is equlpment free of potentially adverse seismic Interaction effects?                                                                                               .                            y Other AdYft[se CondltJons
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the                Y equipment? .
Temporary scaffold adjacent to the filter Is properly restrained and the paperwor/c Is current.
Page 1 of 14

Seismic Walkdo1M1 Checklist (SWC)                Status;    N Equipment 10 No DC-2-23-P-EL-FU41                             Equipment Class: j&sect;              {
Equipment

== Description:==
Control Room Ventilation Filter Unit                                    I Comment:
Evaluated by-                            &#xa3;lam;.
1~0"12-(Oll,J IfZ,-
Page 2 of14

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit...2..
Equipment No. DC-2-23-P-FL-FU41                                                           Attachment 1, Page 1 of 1 Licensing Basis Evaluation rssue:
Anchorage Drawing 448338-1, for the anchorage of Filter Unit FU41, Incorrectly shows the embedded anchors for the filter unit to be 518" diameter. The as-found anchors are ~" diameter.
Evaluation:
Filter Unit FU41 is Design Class I. Its functfon is to fHter the supply air for the Unit 2 Control Room. It is located @ elevation 154' in Area H of the Auxlfiary Building. The qualification of the filter unit Is found under Seismic Calculation File No. D-HVAC..5.11 .. 1. The seismic calculation assumes the anchors to be ~It diameter (as-found condition = analyzed condition).
Therefore, this condition does not impact the operation of DCPP.
Recommendation:
Drawing 443333-1 needs revision to reflect the as-found size of the embedded anchors.
Notification Required: Yes (50519791)
Evaluated by:    _- .;. J>.:. .IZ(.~ ~"-:rt_o_._l~_;r--___
__                                 --f---t-_ _--:-_ _ _ _ _ _ __
Reviewed by:     _~(\)~*~~_---lUJC=!..o&#xa3;~~lL-~f!!!::~:"""_ _~~::::!:::"-I-JU~2.~_ _ _ _ _ __

Seisnic walkdown Chedclist (SVtIC)                                              Status:   Y Equipment 10 No DC-2-23-P-VOS-VAC-2-ECY-7QQ                                                  Equipment Class:    ~
Equipment

== Description:==
pOst-LOGA Sample System retum fine to containmeot valves Location:         Building: Auxiljary                      FloorEI.     .100                 Room, Area: 2-FCVZOO Manufacturer, model, Etc.      Yaloor engIneering Coro  t instructions for Completing Checklist This checklist may be used to document the results of the Seismlo Walkdown of an item of equipment on the SWEL. The space below each of th~ folloWing questions may be used to record the results. of judgements and findings. Additional space Is provided at the end of this checklisUor documenting other comments.                        .
Ancmorage
: 1. Is the anchorage configuration verification required (I.e, is the item one of the 50% of SWEL items requiring such          N verification)?
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
Small instrument valve with tubing on both sides of the valve (U-bolts) Bnd the operator (bolted strap) secured to the same mounting bracket. The mountIng bracket (s anchored to the concrete wall by (4) 1/2" expansion anchors.             v
: 3. Is the anchorage free of corrosion that is more than ~ild surface oxidation?
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                  y
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only appUes if the Item Is       N/A 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?                 y Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                       y Overhead piping (CCWand fire water), conduit junction boxes, and cable trays Bre well supported.
: 6. Are overhead equipment, distrIbution systems, calling tiles, and lighting, and masonry block walls not likely to           y collapse onto the equIpment?
No masonry block walls In area.
: 9. Do attached lines have adequate flexibility to avoid damage?
Electrical/ina to valve has adequate flexibility.
v
: 10. Based on the above seismic Inter~ction evaluations, is eqUipment free of potentially adverse seismic interaction effects?                                                                                                                      y oth@f Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the          Y eqUipment?
Page 1 of8

Seismic Walkdown Cheddist (SWC)                                        Status:    Y Equipment 10 No DC-2-23-P-VOS-VAC-2-FCV-700                                        Equipment Class: !l Equipment

== Description:==
Post-LOCA Sample System retyrn Iioe to containment valves
 -~    ---             . - ~     --- .- - -- .~- ---- -.-                          .-. - --    - ~-. "--- .---
Comment:
Evaluated by:
                                                                                         / &>/      I
                                                                                                .t'&#xa5; ~~z.
10/19/ZOIL Page 2 of 8

SeiSlric Walkdcmn Cheddist <SWC>                                              Status:   Y Equipment 10 No DC-2..25-M.TK-BUAS-602                                                        equipment Class:   21-Equipment

== Description:==
ASW Flow Control Valve NQ ECV-602 Elackyp Air Accumylator Location:           Building: Iyrblne                      FloorEI. M                         Room. Area:  2~CCWHE Manufacturer, model, Etc.
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 ofJudgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (i.e, Is the item one of the 60% of SWEL Items requiring such         N verification)?
The anchorage consists of weldments that ere substantial end adequately support the air tanks.
: 2. Is the anchorage free of bent, broken, miSSing or loose hardware?
v
: 3. Is the anchorage free of corrOSion that Is more than mild surface OXidation?                                               v.
. 4. Is the anchorage free of visible cracks in the concrete near the anchors?                                                 N/A
: 5. Is the anchorage configuration conSistent with plant documentation? (Note: ThiS question only applies if the item is      N/A 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?                 v interaction Effsel!
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                       y The accumulators are located In a niche in the concrete wall that protects them from falling Objects. Thus the only soft targets for the accumulator tanks is the stainless steel transfer tubing that runs along the wall.
: 8. Are overhead equipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to           y collapse onto the eqUipment?                                                                                .
Possible failing sources Include the room lighting fixtures, the emergency lighting, and the nearby masonry block wall. The lighting fixtures are adequately restrained and the reinforced masonry wafl includes additiona/support at the base and near the topThe nearby room lighting fixture will likely swing dUring an earthquake and the support rods wllllikeJy impact the sew piping that Is in close proximity. It is Judged that such impact could jar the fluorescent tubes loose from the fixture, but these pose no hazard to the tubing. Such Impact should not result In failing of the fixture Itself.
: 9. Do attached nnes have adequate flexibility to avoid damage?
y
: 10. Based on the above seismic Interaction evaluations, is eqUipment free of potentially adverse seismic interaction effects?                                                                                                                      v gtber Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the          Y equipment?
Page lof6

Seisnic Walkdo1M1 Checklist (SWC)                                   Status:   Y Equipment 10 No PC-2-25-M-TK-BUAS-602                                           Equipment Class: 2.1 Equipment

== Description:==
ASW Flow Control Valve No. ECV.&sect;Q2 Backup Air Accumulator Comment:
                                    ~k'~
Evaluated by:
KA
                                       =-A*a)~
Page 2 of 6

Status:
Equipment ro No OC-2-36-E-PNL-RNARA                                                         Equipment Class:      20 Equipment

== Description:==
Auxiliary Relay RacK*
Location:          Building: Auxiliary                    FloorEI. 128                   Room, Area:      2-RNARA Manufacturer, model, Etc.
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 folioy.,ting questions may be used to record the results of judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.                                                                   '
Anchorage
: 1. Is the anchorage configuration verification required (Le, is the item one of the 50% of SWEL items requiring such              N verification)?
y
: 2. Is the anchorage free of .bent, broken, missing or loose hardware?
A false floor is created by a series of W10 wide flange beams that are bolted to the concrete slab by 5/8" expansion anchors spaced on 24" centers aflemating on either side of the beam. The panel Is welded to the flange of beams                y running along the front and back of the panel. The original welds are 1" to 1-11211 long 3/16" fillet welds spaced on 611 centers. Howevet; due to a gap resulting from leveling, the effective weld is substantially Jess being on the order of 1116" in some cases. These welds appear marginal since they are shofter and effectively sma/{er welds than for the Unit 1 panel and this panel does not have the added welded tabs that are present on the Unit 1 panel. For disposition see Attachment 1.
: 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?                                                       y
: 5. Is the anchorage configuration consistent with piant documentation? (Note: This question only appfies if the item is          N/A one of the 50% for which a.n anchorage configuration ,verification is required.)
The welds appear to be shorter and smaller than that specified as the original welds on drawing 050053-64.
: 6. Based on the above anchorage evaluations1 is the anchorage free of potentially adverse seismic conditions?                    x The end weld is missing on one side of the panel such that there are (5) welds one one side and only (4) welds on              N the oiher. For disposition see Attachmenl1.                                                                               .jflJ'-
Interaction Effects II/to//1P
: 7. Are soft: targets free from impact by nearby equipment or structures?                                                          y Panel RNAR~A is the end panel of three similar adjacent panels. The panels are connected at the top by plates that span between adjacent panels and are bolted to the top structural members for each. These connecting plates are located both front and back.
: 8. Are overhead equipment, distribution systems. ceiling tiles, and lighting, and masonry block walls not likely to               y collapse onto the equipment?                                .
of Several layers conduit run above the panels that appear to be rigidly supported. Conduit runs also enter the' top of the panel, Cable frays run above the front and back of the panel and these are also rigidly restrained.
: 9. Do attached lines hava adequate flexibility to avoid damage?
y Connections are via rigid conduit
: 10. Based on the above seismic interaction evaluations, Is equipment free of potentially adverse seismic interaction effects?                                                                                                                          y Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the              Y equipment?
Page 1 of 14

WcliKitl01Ml Cheddist                   Status:
Equipment ID No DC-2*36-E-PNL-RNARA                                 Equipment Class: ~O Equipment

== Description:==
Auxiliary Relay Rack Comment:
Evaluated by:                                  Date:
                                                                     /~~G"/2.0IZ-
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                                                                                                      -r Page 2 of 14 I

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit ~
Equipment No. DC-2-36-E-PNL-RNARA                                                          Attachment 1, Page 1 of 5 Licensing Basis Evaluation Issue:
The base welds between the bottom of Unit 2 RNARA and RNARB panels and floor beams are found smaller than the evaluation in the civil calculation.
Evaluation:
Units 1 and 2 RNARA and RNARB are bolted together with panels RNASA, RNASB and RAR and located In cable spreading room (Aux Building 128'). The evaluation of panel Interaction is documented in seismic legacy calculation ES-62.
The as-buHt of base weld evaluations are shown In the following Civil EPA calculations; Unit 1 RNARA & RNARB is documented In          EPA~4.
Unit 2 RNARA & RNARB is documented in EPA-19.
Units 1 and 2 RNASA. RNASB and RAR is documented in EPA-31.
Evaluation:
RNARA and RNARB are non-safety related equipment, and qualified for the structural integrity in seismic legacy calc # ES-082.
During Fukushima 2.3 seismic walk down, among of all fine-up panels in Unit 1 and 2, it is found that Unit 2 RNARA and RNARB panel base weld size is approximately 1/8", the weld lengths are various from 1" to 1-1/2" long, which are smaller than that was analyzed. According to the original field walk down of Unit 2 RNARA and RNARB. each panel has five (5) welds in the front and back. They are 3/16" fillet weld, 1-1/2" long and 7" center to center. The seismic evaluation of the base welds is documented in civil calculation EPA-19.
The as-found condition Is evaluated and shown in pages 2 through 5. The result shows that the as-found condition is adequate. The as-found condition has no adverse effects on the seismic qu~lification of Unit 2 RNARA and RNARB.
This condition does not impact the operation of DCPP.
Notification Required: Yes ( 50512682 )
Evaluated by:    _--f-:iJ.~~~'~-=~~;:.p-_----.l/O{l...-t!--I-.I_(2-.                     _ _ _ __
Reviewed by: --]l~~'~....;.f_1~~~"-IlIo'-;~_ _ _ _ _ _. .;,.IO-+~. ;: : ,;l3~J. . :. ._
                                                                                      /~ _ _ _ _ _ _ _ __
                                                                 . I

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unitl.
Equipment No. DC-2-36-E-PNL-RNARA                                                                                                  Attachment 1, Page 2 of 5 A SS \) MF.: S """ \.\ cA B\I*~(? **r,;,;                               r-' 5      f:>df._ U A]i T r.:~(. r~ ,.:l/v !\I..YS \ C.
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Pv

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit &#xa3; Equipment No. DC-2-36-E-PNL-RNARA                                          Attachment 1, Page 3 of 5 t';; t I >
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Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit.&#xa3; Equipment No. DC-2-36-E-PNL-RNARA                                                                                                   Attachment 1, Page 4 of 5 C J-t EC-\r(. . \J .I'Z T\ CA L-                          -{- 1-L O~\ '7.::0"'" -l*A               L.
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Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit l.
Equipment No. DC-2-36-E-PNL-RNARA                                  Attachment 1, Page 5 of 5 1/1&#xa3; C;48/A,.JZ57            f/VITI~/V/             S/-I/Jtt-   8e i',        /34r? 8LS (Sfit2 AJ?jJ5/v.PIX 118//)

Seismic W8lkdolNl1 Checklist (SWC)                                              Status:    y Equipment 10 No DC-2-38-f-PNL-RNSIA                                                         Equipment Class:
Equtpment

== Description:==
        -SSpS - Input Relay Cabinet Location:            Building:  ~                          Floor EI. .1!Q                    Room, Area: .2.::SSf.S.
Manufacturer. model, Etc.
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 judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (i.e. Is 1he item one of the 50% of SWEL Items requiring such           Y verification)?
Y
: 2. Is the anchorage free of bent. broken. missing or loose hardware?
 . All visible anchorage Is In good condition.
y
: 3. Is the anchorage free of corrosion thal Is more than mild surface oxidation?
No corrosIon Is present.
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                   N/A Panels are all welded to embedded plates.
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This qu~stion only applies If the Item Is         y one of the 50% for which an anchorage configuration verificatfon Is required.)
Panels RNSIA, RNSLA. and RNSOA are part of a continuous cabinet. The bottom of the cabinet has (4) 112" x 2-112" X 4" A-36 galvanized steel plates welded to embeds on both sides. Previously, there were (5) 114" fillet welds with weld lengths of 2-112" on both sides of the cabinet. Some of the welds were (amoved In order to incorporate the plates that were welded to the embeds. Verification of the welds that were not removed could not be done due to the rubber skirting glued at the bottom of the cabinets. Furt~er Investigation Into Calculation EPA-2 showed that the original fillet welds were neglected and only the welded embeds were used In the design calculation. Therefore, the original welds do not need to be verified since they are not part of the design basis. See drawings 050053 sheet 65 and CALC NO. EPA-2
: 6. Based on the above anchorage evaluations. Is the anchorage free of potentially adverse seismIc conditions?                    Y No adverse conditions were identified.
InteractIon Effects
-7. Are soft targets free from Impact by nearby eqUipment or structures?                                                         y No soft targets are present on the panel.
: 8. Are overhead equipment. distribution systems, ceiling tiles. and lighting. and masonry block walls not likely to              y collapse onto the equipment?
Overhead ceiling tiles may fall onto the cabinet if they are not seismically restrained but there are no soft targets, therefore no negative affect.
: 9. Do attached lines have adequate flexibility to avoid damage?
y All attached lines use flexible conduit.
: 10. Based on the above seismic interaction evaluaUons. is equipment free of potentially adverse seIsmIc Interaction effects?                                                                                                                         y No seismic interaction issues were identified.
Other Advar&sect;A ConditIons
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the             Y equipment?
Page 1 of 14

Seismic Walkdovtn Checklist (SWC)               Status:   Y Equipment 10 No OC-2-38-I-PNL-RNSIA                          Equipment Class: 20 Equipment

== Description:==
SSPS - Input Relay cabinet Comment:
Evaluated by-      KTM
                                             ~-~
Page 2of14

Seismic walkdolNl1 Checklist (SWC)                                    Status:   y Equipment 10 No PC-2-38-I-PNL-RNSLA                                                          Equipment Class:   2Q Equipment DeSCription:          SSPS - Logic Cablnent Location:           Building: ~                            FloorEI.     ~                    Room, Area:   a-ssps Manufacturer, modeJ, Etc.
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 judgements and findings. Additional space Is provided at the end of this checkfist for documenting other comments.
Anch~rage
: 1. Is the anchorage configuration verification required (I.e, Is the Item one of the 50% of SWEL items requiring such         N verlficatfon)?
y
: 2. Is the anchorage free of bent. brokent missing or loose hardware?
All visible anchorage Is In good condUion.
: 3. Is the anchorage free of corrosion that fs more than mild surface oxidation?                                                Y No corrosion Is present.
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                  N/A Panels are all welded to embedded plates.
: 5. Is the anchorage configuration consistent wIth plant documentation? (Note: This question only applies If the item is       N/A one ofthe 50% fo~which an anchorage configuration verification Is requIred.)
: 6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?                  y Panels RNS/A, RNSLA. and RNSOA are part of a continuous cabinet. The bottom of the cabinet has (4) 1/2" x 2-*
1/2" X 4" A-36 galvanized steel plates welded to embeds on both sides. Previously, there were (6) 114" flIlet welds with weld lengths 0(2-112 11 on both sides ofthe cabinet. Some of the welds were removed In order to Incorporate the plates that were welded to the embeds. Verification of the welds that were not removed could not be done due to the rubber skirting glued at the bottom of the cabInets. Further Investlgat/on Into Calculation EPA-~ showed that the original fillet welds w~re neglected and only the welded embeds were used In the design calculation. Therefore, the original welds do not need to be verified since they are not parl of the desIgn basis. See drawings 050053 sheet 65 and CALC NO. EPA-2. No Issues were Identified.
InteraqtlOn Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                        y All nearby eqUipment are properly secured to prevent Impact with the cabInet.
: 8. Are overhead equipment, distribution systems. ceiling tiles, and lighting. and masonry block walls not likely to            y collapse onto the equipment?
External buttons are on the face of the cabinet. The suspended ceiling Is hung with a braced un/strut system. The HVAC duct Is braced and the registers are Independently lad hung.
: 9. Do attached tines have adequate nexibility to avoid damage?
y All attached lines use flex;ble conduit.
: 10. Based on the above seismic interaction evaluations. is equipment free of potentially adverse seismic interaction effects?                                                                                                                       y No seismic Interaction Issues were identified.
other Adyerse CondltJons
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the           Y eqUipment?
Page 1 of 13

Seismic Walkdo\lUl1 Cheddist (SWC)               Status:    y Equipment 10 No DC-2-38+PNl-RNSlA                              Equipment Class:
Equipment

== Description:==
SSPS - Looic Cabjnent Comment:
Eyaluated by;      KTM                   .Dal!1;.
                                           ~,~                         Je/15/ ().O} ()-
SMM
                                       ~6 Page 2of13

Seismic Walkdo",," Checklist (SWC)                                             Status:   y Equipment 10 No          DC-2-38-I-PNL~RNSOA                                                Equipment Class: 2.Q Equipment

== Description:==
SSPS - Output Relay Cabinet Location:            Building: ~                           Floor EI. 140                     Room. Area: 2:SSPS.
Manufacturer, model. Etc.
Instructions for Completing Checklist Thfs 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 folfowing questions may be used to record the results of judgements and findings. Additional space Is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (I.e, Is the item one of the 50% of SWEL Items requiring such           N verification)?
y
: 2. Is the anchorage free of bent, broken. missing or loose hardware?
All visible anchorage Is In good condition.
y
: 3. Is the anchorage free of corrosion that Is more than ~ild surface oxldatio'n?
No corrosion is present.
: 4. Is the anchorage free of visible cracks in the concrete near the anchors?                                                   NfA Panels are all welded to embedded plates.
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item Is        NIA 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?                   y Panels RNSIA. RNSLA, and RNSOA are part of a continuous cabinet. The bottom of the cabinet has (4) 1/2" x 2-112" x 4" A-36 galvanized steel plates welded 10 embeds on both sides. Previously, there were (6) 114" fillet welds with weld lengths of 2~112n on both sides of the cabinet. Some of the welds were removed In order to inoorporate the plates that were welded to the embeds. Verification of the welds that were not removed could not be done due to the rubber skirting glued at the bottom of the cabInets. Further investigation Into Calculation EPA*2 showed that
 . the orfginal fillet welds were neglected and only the welded embeds were used In the design calculation. Therefore, the Original welds do not need to be verified since they are not part of the design basis. See drawings 060063 sheet 65 and CALC NO. EPA-2. No Issues were ldentifled.
Interaction Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                         y No soft targets are present on the panel.
B. Are overhead equIpment, distribution systems, ceiling tiles. and lighting. and masonry block walls riot likely to            y collapse onto the equIpment?
Overhead ceiling tiles may fallonto the cabinet If they are not seismically restrained but there are no soft targets, therefore no negative affect.
: 9. Do attached lines have adequate flexibility to avoid damage?
y All attached lines use flexible conduit.
: 10. Based on the above seiSmic interaction evaluations, Is equipment free of potentially adverse seismic Interaction effects?                                                                                                                        y No seismic interaction Issues were./dentified.
Q&ber Adyerso Conditions
: 11. Have you tooked for and found no other seismic conditions that could adversely affect the safety function of the            Y equipment?
Page 10f14

Seismic Walkdo\lUl1 Checklist (SVtIC)             Status:    Y Equipment to No PC-2-38-I-PNL-RNSOA                            Equipment Class: 2Q.
Equipment

== Description:==
SSPS - Output Relay Cabinet Comment:
Eyaluated by;
                                         ~
SMM          6 Page 2 of 14

Seismic Walkdo1lVl1 Checklist (S\NC)                                             Status:    y Equipment 10 No DC-2-38-I-PNL-RNSTA                                                         Eq4ipment Class:
Equipment

== Description:==
SSPS - Test Cabinet Location:          Building: ~                             FloorEI. jAQ                      Room. Area:    ~
Manufacturer. model, Etc.
Instructions for Completing Checklist ThJs 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 questi0r:ts may be used to record the results of judgements and findings. AddItional space Is provlded at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (i.e, is the item one of the 50% of SWEL Items requiring such            N verification)?
y
: 2. Is the anchorage free of bent, broken. missing or loose hardware?
All vis/ble anchorage ;s In good condition.
y S. Is the anchorage free of corrosion that Is more than mild surface oxidation?
No corrosion is present.
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                    N/A Panels are' all welded to embedded plates.
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item Is         N/A one ofthe 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?                 , y No adverse conditions were Identified.
; {
Interaction Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                          y No soft targets' are present on the panel.
: 8. Are overhead equipment. distribution systems, ceiling tUes, and lighting, and masonry block walls not likely to               y collapse onto the equipment?
Overhead ceiling tiles may fall onto the cab/net if they are not seismically restrained but there are no soft targets, therefore no negative affect.
: 9. Do attached lines have adequate flexibility to avoid damage?
All attached lines use flexible conduit.
v
: 10. Based on the above seismic Interaction evaluations, Is equipment free of potentially adverse seIsmic Interaction effects?                                                                                                                         y No seismic interaction Issues were Identified.
Other Adyerse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the             Y eqUipment?
Page 1 of 12

Seismic Walkclown Checklist -(SWC)                                                Status:          Y Equipment 10 No PC-2-38-I-PNL-RNSTA                                                            EquIpment Class: 20.      .
Equipment DescrIption:   SSPS - Test Cabinet
                                                                                                                              -.***_-----****0 Comment:
Evaluated by'                                                             .Ilati:.
                                                                                                        \0/;5/ J.o\d..-
SMM
                                         ~
Page 2 of12

Sheet 1 of5 Status: ~
Seismic Walkdown Checklist (SWC)
Equipment ID No.           DC-2-42-M-EJ-FTC-2-EJ2                      Equipment Class l2       o. (Other)
Equipment

== Description:==
Fuel Transfer Tube Expansion Joint Location: Bldg.       Auxiliary        Floor EI. 100'              Room, Area :;::.2--=E=J=2_ _ _ _ _ _ _ _ _ _ _ _ _ __
Manufacturer, Model) Etc. (optional but recommended)          Tube-Turn Bellows Expansion Joint Instructions for Completing Chec1dist 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 the checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (i.e., is the item one of the 50% of SWEL items             N requiring such verification)?
: 2. Is the anchorage fi'ee of bent, broken, missing or loose hardware?                                              NIA This SWC applies to potential SFP rapid drain-down through the expansion joint where the Fuel Transfer Tube (FIT) penetrates the exterior wan of the Fuel Transfer Canal (FTC). The expansion joint is welded to the FIT at one end and the steel penetration sleeve that is cast into the concrete wall of the FTC at the other end. Therefore, anchorage is not applicable.
: 3. Is the anchorage free of cOirosion that is more than mild surface cOirosion?                                    NIA
: 4. Is the anchorage free of visible cracks in the concrete near the anchorage?                                     N/A
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only                   N/A applies if the item is one of the 50% for which anchorage configuration verification is required.)
: 6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic                  NtA conditions?
Interaction Effects
: 7. Are soft targets fi'ee from impact by nearby equipment or structures?                                             y The expansion joint is a soft target, but is located in a recess in the west wall of the Fuel Transfer Canal (see drawing no. 500973), which completely protects it from any falling objects.
: 8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not             Y likely to collapse onto the equipment?
The expansion joint is located in a recess in the west wall of the Fuel Transfer Canal (see drawing no.
500973), which completely protects it from any falling objects.
: 9. Do attached lines have adequate flexibility to avoid damage?                                                      Y The function of the expansion joint is to accommodate any differential displacements between the Fuel Transfer Tube (which is anchored in to the Containment Structure) and the exterior wall of the Fuel Transfer Canal (which is part of the Auxiliary Building). There are no lines, other than the Fuel Transfer Tube, attached to the expansion joint.
12 Enter the equipment class name from Appendix B: Classes of Equipment

Sheet 2 of5 Status: ~
Seismic Walkdown Checklist (SWC)
Equipment ID No.           DC-2~42-M-EJ-FTC-2-EJ2                      Equipment Class 12     o. (Other)
Equipment

== Description:==
Fuel Transfer Tuhe Expansion Joint
: 10. Based on the ahove seismic interaction evaluations, is the equipment fi. ee of potentially adverse                  y seismic interaction effects?
Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety                    y function of the plant equipment?
Minor corrosion was noted on the interior surface (dry side) of the expansion joint. See Attachment No.1 for disposition.
Comments (Additional pages may he added as necessary)
This SWC applies to potential SFP rapid drain~down through the Fuel Transfer Tuhe (FIT) expallsion joint (see drawing nos.
500197 and 663321-2 and the figure on sheet 3 of thjs SWC). Access to the intetior surface (dry side) of the expansion joint is through a nan'OW annular space hetween the outside ofthe FIT (20" diameter pipe) and the inside of the 26" diameter penetration sleeve cast into the exterior concrete wall (27" thick) of the Fuel Transfer Canal (FTC). The exterior surface (wet side) of the expansion joint is located in a recess in the west wall of the FTC, which is near the bottom of the 40' deep FTC.
As indicated on drawing no. 663321-2, the expansion joint is fabticated from stainless steel. It is exposed to boric acid (SFP water) on the wet side and the outside atmosphere on the dry side (access to the dry side is through the seismic gap between the Auxiliary Building and the Containment Structure). Based on the potential enviromnental effects on the expansion joint, the dry side was selected for detailed visual examination, which was performed using a "horoscope" inserted lnto this annular space, which provided a display on a video monitor (screen shots from the video monitor shown on sheet 5).
Evaluated by:        wrh                                                                   Date:
                                                                                                        'D~
12 Enter the equipment class name from Appendix B: Classes of Equipment

Seismic Wall<down Checklist (SWC)
DIablo Canyon Power Plant. Unit ~
t:qufpment No. DC~2-42-M-EJ-FTC-2-EJ2                                                                                    Attachment i. Page 1 of 1 licensing Basis Evaluation Issue:
       .MInor surface corrosion was noted on the Interior surface (dry side) of the expansion JoInt.
Evaluation:
The E~pan$ron Joint Is Design Class I and seismically qualified. fis flfnotion is to provide a lea((-tlght seal around the Fuel Transfer Tupe where It exits the west wall of the Fuel Transfer C~nal while accommodating differential selsmlo and LOCA dlsplaoements between the Containment ExterIor Concrete Structure and the Fuel Handling Area of the Auxiliary Building. The Expansion Joint Is not a pressurized component, and Is only subject to the water pressure assocJ~ted with the hydraullo head associated with the water level In the Fuel Transfer Canal (approx. 40 ft.). Note that at this time, the Fuel Transfer Canalis -flooded, so there Is minor hydraldfc head applied to the Expansion ~()Int.                         .
The extent of the oorroslor:t is minor. and will not compromise the structural Integrity of the Expansloh_Joint.
Recommendation: .
       .. Request further review/evaluation by the DCPP Metallurgist
       .. Consider developing a routi~e Inspection program to monitor the condition of the Expansion JoInt.
(
 ' . . Notification Required: Yes (50518406)
Evaluate~ by: _w.!!.!r:.!.!..h__*.. .~
                                            .:_ _. --=-~_.--l~
I!. -::....-_---::::::=_ _.!..:'u=-l-/..::..lz.,:.,..;":.....;'l::..-_ _ _ _ _ __
Reviewed by:      -*~~'.I-_~~~~:;;..:~;:::;,~.......::::::s~        ___       --:-~l~rJt~IP~~f.J.II..::;.-z...._ _ _ _ _ __
C_'5

Seismic WalkdoW1 Checklist (SW'C)                                              Status:   Y Equipment 10 No DC 2*43 I-PNl-RNCI1 M      M Equipment Class:   1a Equipment Descriptfon:        process Control and Protection System - Computer Input Rack No. RNCI1 location:         Building:   ~                           Floor 8. .tiQ                     Room, Area: 2:W1 Manufacturer, model, Etc.
Instructions for Completing Checklist This checklist may be used to document the results of the SeIsmic Walkdown of an item of equipment on the SWElt The space below each of the following Questions may be used to record the results of judgements and flndlngs. Additional space Is provided at the end of this checklist for documenting other comments.
Anchorag&
: 1. Is the anchorage configuration verification required (I.e, Is the item one of the 50% of SWElltems requiring such           N verification)?
y
: 2. Is the anchorage free of bent. broken, miSSing or loose hardware?
No bent, broken, or missing hardware observed. The pane/Is welded to embedded steel plates In the Roor.
: 3. Is the anchorage free of corrosIon that is more than mUd surface oxidation?                                                 Y No corrosion ~bserved'
: 4. Is the anchorage free of visible cracks in the concrete near the anchors?                                                   y No cracks observed In the concrete (Jns~de panel).
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is       N/A one of the 50% for which an anchorage configuration verification Is required.)
: i 6. Basad on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?                  y Interaction Effects
: 7. Are soft targets free fr~m Impact by nearby equIpment or"structures?                                                        y The pane/Is bolted to the adjacent panels to prevent pounding
: 8. Are overhead equIpment, distribution systems, ceiling tiles, and lighting. and masonry block walls not likely to            Y collapse onto the equipment?
Suspended ceiling Is hung by a braced un/strut system. The lighting over the control consoles and vertical boards are Independently hung. The HVAC duct Is braced afJd the registers are Independently rod hung. No masonry walls.                     .
: 9. Do attached lines have adequate flexibility to avoid damage?
y Raceway at the top of the pane/Is braced
: 10. Based on the above seismic Interaction evaluations, Is equipment free of potentially adverse seismic Interaction effects?                                                                                                                      y Other Adverae Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the          Y equipment?
Page 1 of 18

Seismic Walkdovun Cheddist (SVVC)                                           Status: Y EquIpment 10 No DC-2-43-I-PNL-RNCI1 Equipment Class:     j!l Equipment

== Description:==
Process Control and Proteotion System - Computer Input Raets No RNCll Comment:
The panel Is welded to steel plates embedded In the concrete floor. No relays are mounted In the panel. All hardware Is securely mounted.
Evaluated bY' Page 20flS

Seismic WalkdolMl Checklist (S\IVC)                                          Status:    Y Equipment 10 No PC-2-64-e-pNL-ARP                                                            Equipment Class: 2Q.
Equipment DeSCription:        Auxiliary Relay pane!
location:         Building:  ~                             Floor EI.                         Room, Area: 2-PNL-ARP Manufacturer, model, Etc.
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 fonowing questions may be used to record the results of Judgem~nts and findings. Additional space Is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (I.e, Is the Item one of the 50% of SWEl Items requirIng such         N verification)?
Y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
.'     All of the anchor bolts (both Inside and outside of the panel) are In good cond/Uon.
y
: 3. Is the anchorage free of corrosion that is more than mild surface oxidation?
No corros/on present.
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                   Y No cracks are seen In the concrete.
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question onry applies If the Item is       NfA 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?                  y The inside of panel Is anchored to the Roar (see pictures). The back of the panel is anchored to the adjacent
:i   cabinet. The top 01 the pane/Is welded to a braced frame which acts. as both 8 vertical and lateral restraint.
Interagtlon Effects
: 7. Are soft targets free from Impact by nearby equipment or structures?                                                        Y All overhead cable trays are seismically braced.
: 8. Are overhead eqUipment, distribution systems, ceiling tiles. and lighting, and masonry block walls not likely to            y collapse onto the eqUipment?
Block walls have been retrofitted with steel members which are anchored at the top and bottom of the walls.
: 9. Do attached lines have adequate flexibility to avoid damage?
Y AI/attached lines have adequate flexibility.
: 10. Based on the above seismic Interaction evaluations, is eqUipment free of potentially adverse seismic Interaction effects?                                                                                                                       y No Interaction Issues were found.
Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the           Y equipment?
Page 1 of 15

Seismic Walkdown Checklist (SWC)               Status:   Y Equipment 10 No     DQ..2~64-E-PNL-ARP                       Equipment Class: 20 Equipment Descriptfon:   Auxlllary Relay Panel Comment:
Evalyated by'                           ~
IO/'S/~'~
Page 20f15

Seismic Walkdo\Nl1 Checklist (SWC)                                            Status:   Y Equipment 10 No DC-2-65-E-LC-PY21                                                            Equlpment Class:   2 Equipment

== Description:==
120Y AC Instrument Breaker Panrus.,.
LocaUon:          Building: A.willlacl                     Floor EI. lli                  Room, Area:  2-BTC21 Manufacturer, model. Etc. Federal pacific Electric 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 quesUons may be used to record the results of judgements and findings. Additional space Is provided at the end of this checklist for documentrng other comments.
Anchorage
: 1. .Is the anchorage configuraUoO' verificatIon required (i.e. Is the item one of the 50% of SWEL items requiring such        Y verification)?
Y
: 2. Is the anchorage free of bent. broken, mIssing or loose hardware?
y
: 3. Is the anchorage free of corrosion that Is more than mUd surface oxIdation?
No corrosion observed
: 4. Is the anchorage free of visible cracks In the concrete near the anchors?                                                  y No cracks observed
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the item Is       Y one of the 50% for which an anchorage configuration verification is required.)
The anchorage /s consistent with Drawing 050041 sheet 47
: 6. Based on th~ above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?                 y Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                       y No soft targets.
: 8. Are overhead eqUipment, distribution systems. ceiling tiles, and lighting. and masonry block walls not likely to           y collapse onto the equipment?
Overhead conduit and duct are well supported.
: 9. Do attached lines have adequate flexibility to avoid damage?
y Conduit and cable tray are supported close to the panel so no significant relatiV9 displacements are expected
: 10. Based on the above seismic Interaction evaluations. is equipment free of potentially adverse seismIc Interaction
~~                                                                                                                            y No credible interaction sources.
Other Adyerse CondlUODS
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the          Y equipment?
Page 1 ofG

Seismic WalkdolNl1 Checklist (S\IVC)
Equipment 10 No DC-2-65-E-LC-pY21                              Equipment Class:
Equipment

== Description:==
120V AC Instrument Breaker panels Comment:
The Intemal components are securely mounted to the panel.
Evaluated by' Page 2of6

                                                                                                                               ~I'.f      fl/1..o/\1..
PeL     Ul,i/'Z, Seismic Walkdown Cheddist (SWC)                                                status:      ~N Equipment 10 No OC-2-65-E-UPS-IY21                                                           Equipment Class:      16 Equipment

== Description:==
120V AC Inverters Location:         Building: Auxiliary                       FloorEI. ill                   Room, Area:    2-BTC21 Manufacturer, model, Etc. Solidstate Controls Inc Instructions for C0!11pleting 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 judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification required (i.e. is the item one of the 50% of SWEL items requiring such                 y verification)?
y
: 2. Is the anchorage free of bent, broken, missing or loose hardware?
No broken bent or missing hardware.
y
: 3. Is the anchorage free of corrosion that is more than mild surface oxidation?
No corrosion observed.
: 4. Is the anchorage free of visible cracks in the concrete near the anchors?                                                           y No concrete cracks
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is                Y one of the 50% for which an anchorage configuration verification is required.)
The anchorage is consistent with drawing 050053 sheet 222
: 6. Based on the above anchorage evaluation"s, is the anchorage free of potentially adverse seismic conditions?                         y Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                                 y Switches mounted on the front panel are protected by a plexlglass cover plaie
: 8. Are overhead equipment. distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to                     y collapse onto the equipment?
Conduit and cable trays are well supported. Overhead HVAC duct is braced. Lighting is conduit hung with ball and socket connection and closed hooks to permit sway but maintain positive vertical load capacity
: 9. Do attached lines have adequate flexibility to avoid damage?
y Conduits have flex connections at the top of the panel
: 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects?                                                                                                                               Y Fire exUnguisher is adequately restrained. Adjacent emergency light BOL-2-29R is seismically qualified so it is not an interaction source Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the                ~
equipment?
N The mounting brackets for the transformers at the bollom left side of the panel have eight (8) locations (ho/es) for securing the transformers to the grating on the panel bottom. Only six (6) ofibe holes have bolts. Similarly, only            I>l&#xa3;.,
five (5) of the eight holes are utilized (have bolts) for securing the transformer on the bottom right side of the panel.
See Attachment 1 for disposition of this mounting configuration.                                                              11/" '11."
                                                                                                                             ~
ul2uJIt..
Page 1 of 12

ofJ'l ll/'V.> lit j)t(. l'f"/~
l'1 Seismic Walkdo'Wtl Cheddist (SWC)               status! ,>t""
Eqliipment ID No DC-2-65-E-UPS-IY21                           Equipment Class: 16 I
Equipn1ent

== Description:==
120V AC Inverters
                                                                                                     .I Comment:
Evaluated by:
                                                            "O/~(~C> 17-I I
l-~-HI------
                                                                /O(ZJ/ 10                             I .I I
I j
1 I
I I
I I,.
I I
1 Page 2 of12

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit 2.
Equipment No. DC-2-65-E-UPS-IY21                                                                              Attachment 1, Page 1 of 4 Licensing Basis Evaluation The mounting brackets for this transformer have eight holes for mounting bolts. However, therf) were only six bolts installed in the bracket on the left and five bolts in the bracket on thE} right. (see sketch on Page 3).
Evaluation:
This transformer is Design Class I and seismically qualified. The seismic qualification of this component, as documented in Calc. No. ES-68-1, is based on shake table testing. A review of the test specimen (which is currently located in the DCPP Cold Machine Shop) indicates that the transformers .are bolted on the bottom cabinet grating with six (6) %i' diameter Grade 2 bolts.
The as-found mounting condition is evaluated against the condition addressed in calculation no. ES-68-1 on page 4 of this Attachment. This evaluation indicates that a significant safety margin for the mounting bolts is available.
Therefore. as-found condition of IY21 has no adverse effect on the seismic qualification of this component, so this issue does not impact the safe operation of DCPP.
Recommendations:
    - Perform an Extend of Condition review to determine if other similar transformers are impacted
    - Revise calculation no. ES-68-1 to address the as-found condition Notification Required: Yes (50518785)
Evaluated by: _..!..P-=..W..:..:H..!..--_ _ --I--=-_..:::....-.!. - .~___t-~::::..----(-(.)~:. .-fi..0;. -,-'L-.
Reviewed by: __~VV~R~H~______~~__~__~~______________~~~~~___________

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit.&#xa3; Equipment No. DC-2-65-E-UPS-IY21                                     Attachment 1, Page 3 of 4 According to manufacturer, Ametek Solidstate Controls.
Weight of transformer:
80-314009 320 Ibs 80-314007 630 Ibs Field Walk Down Sketch:

Seismic Walkdown Checklist (SWC)
Diablo Canyon Power Plant, Unit.&#xa3; Equipment No. DC-2-65-E-UPS-IY21                                                       Attachment 1, Page 4 of 4 1.) Evaluation of IY-21 As-found Condition: Five (5) bolts are found at the bottom of right side cabinet.
The transformer is a solid, heavy} steel plated component. It can be treated as a rigid body. Therefore, the ~"
o mounting bolts (a total of 7 bolts including 2 bolts on the top of transformer) are equally subjected to the direct shear and tension forces, and no overturning moments.
Seismic Accelerations: 5% damping floor peak RRS (see ES-68-1, Sheet 38)
Horizontal: 4 GIS Vertical: 2.4 G'S Equivalent Static Method: factor of 1.5 multiplies the floor peak accelerations to consider the multi-mode and multi-frequency.
The transformer on the right side is 80-314007-90 (See picture in Attachment 2). The transformer weighs about 6301bs.
0 Shear due to the horizontal seismic load: (63      *; *1.5)* 2 = 1080 lbs I bolt
     . due t a th e ve TenSlOn              . rt'IcaI upward"seismiC Ioad : 630*(2.4-1)*1.5 1891bs 7
Allowable for Grade 2: Tensife strength is 60,000 psi, which is equivalent to A307 bolt.
From Calc. no. SQME-077, Sheet 13:
DE allowable for 1/211 0 A307 bolt:
Tension: 4257 Jbs Shear: 1559 Ibs Interaction Ratio: -  189)2
                       - + (1080)2
                                 - - =.482< 1.0 "OKI!
( 4257        1559        .

Seismic Walkdow1 Cheddist (SWC)                                                Status:    Y Equipment ID No DC-2:65-E-XE..TRY21                                                         Equipment Class:     !
Equipment

== Description:==
Nuclear Instrumentation Regulating Transformers location:         Bunding:   ~                              Floor El .1JXl                  Room, Area: 2-TRY21 Manufacturer. model, Etc.      SoIjdstate Controls Inc Instructions for Compl~ting 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 judgements and findings. Additional space Is provided at the end of this checldlst for doc~menting other comme.nts.
                                                          .  ~"",., . "'~
Anchorage
: 1. Is the anchorage configuration verification required {I.et fs the Rem one of the 50% of SWEL (terns requiring such          y verification)?
Anchored to "oar slab via (2) external angles running front to back. On either side (2) 3/4" bolts secure the angle to the transformer near the comers and (2) 3/4" expansion anchors secure the angle to the Roor.                                 y
: 2. Is the anchorage free of bent. broken, missing or loose hardware?
y
: 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?                                                   y
: 5. Is the anchorage configuration consIstent with plant documentation? (Note: This question only applies if the item Is        y one of the 50% for which an anchorage configuration verification Is requIred.)                                .
The anchorage Is consistent with calculation ES-6&-1 Attachment 6, Sheet 21 (Anchorage option C).
: 6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?                  y Interaction Effects
: 7. Are soft targets free from impact by nearby equipment or structures?                                                        y B. Are overhead eqUipment, distribution systems. ceiling tiles, and lighting, and masonry block walls not likely to            y collapse onto the equipment?
Reinforced masonry wall Immediately behind the transformer Is seismically qualified. Additional support for the wall has been provided at the base and at the top.
: 9. 00 attached lines have adequate flexibility to avoid damage?
y
: 10. Based on the above seismic Interaction evaluations, is equIpment free of potentially adverse seismIc Interaction effects?                                                                                                                       y Other Adverse CoMittons
: 11. HaVe you looked for and found no other seismic conditions that could adversely affect the safety function of the           Y equipment?
Page 1 of 17

Seisnic WalkdolAfl Cheddist (SVVC)                               Status:    Y Equipment 10 No DC-2-65-E-XF-TRY21                                           Equipment Class: !
Equipment

== Description:==
Nuclear Instrumentation Regulating Transformers Comment:
Evaluated by:
                                                                                                                 - I Page 2 of 17

Seismic Wslkdown Checklist (SWC)                                              Status:   Y Equipment 10 No PC-2-67-E-BT-BAT21                                                          Equipment Class: 1&sect; Equlpn:tent

== Description:==
125V DC' Batteries and Battery Racks Location:         Building:  ~                            Floor EI. ill                     Room, Area: 2-BAT21 Manufacturer, model. Etc. C&D LeUN 33 rnstruct/ons 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 Judgements and findings. Additional space is provided at the end of this checklist for documenting other comments.
Anchorage
: 1. Is the anchorage configuration verification requIred (i.e, Is the item one of the 50% of SWElltems requiring such           Y verification)?
y
: 2. Is the anchorage free of ben~ broken, missing or loose hardware?
No mIssing, bent or broken hardware.
y
: 3. Is the anchorage free of corrosion that is more than mild surface oxidation?
No corrosion observed.
4, Is the anchorage free of visible cracks In the concrete near the anchors?                                                   Y No cracks observed
: 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is        Y one of the 50% for which an anchorage configuration verification Is required.)
Anchorages consistent with drawings 496150, 4004949, 496146, and 458684
: 6. Based on the above anchorage' evaluations, Is the anchorage free of potentially adverse seismic conditions?                 y Interaction Effeots
: 7. Are soft targets free from Impact by nearby eqUipment or structures?                                                        y No credible Interaction sources
: 8. Are overhead eqUipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to            Y collapse onto the equipment?
Conduit Is well supported. Overhead lighting Is hung by chains, but each light has a safety chaIn. The masonry walls have been strengthened for out of plane seIsmic loading.
: 9. Do attached lines have adequate flexibility to avoId damage?
Cables have adequate slack                                                                                                   Y
: 10. Based on the above seismic Interaction evaluations, is equipment free of potentially adverse seismIc Interaction effects?                                                                                                                       y PA speaker Is anchored to the wall. Eyewash station is restrained to the adjacent masonry wall. The copper pipe feeding the eyewash station is supported.
Other Adverse Conditions
: 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the           Y equipment?
Page 1 of 14

Seismic WalkdolNl1 Checklist (SWC)                                         Status:   Y Equipment 10 No DC*2*67~E.. BT-BAT21                                                  Equipment Class:     .1.&sect; Equipment

== Description:==
125V DC Batteries and BatteJy Racks Comment:
Racks 21A, 21B, and 21C are single tier racks. Rack 21D Iss two tier rack. The end bolts of racks 21Aand 218 are In contact. However. the plywood spacers between the racks and the rack longitudinal bracing will prevent slgnlflcant pounding. No concerns.
t=valuated by:                                                 ~
I~   I f,/'U> 11..
10/ I1/W 1['
Page 2of14
                                                                                                                         ...}}