Table 7 Evaluation of Faults Which Does Not Consider in the Anti-Earthquake Design (Faults Around the Site) Kashiwazaki Kariwa Nuclear Power Station

Table 7 Evaluation of Faults which does not Consider in the Anti-earthquake Design (faults around the site) Kashiwazaki Kariwa Nuclear Power Station

Distance from the No. Name Area Length Reason which Denies Activeness of the Fault Remark Site 3

Erosion land, No displacement and ① Hosogoe Fault On-shore 7 km 1 15.5 km Figure 2 and Attachment 12 transformation in Kume layer

No displacement and transformation in Yasuda ② Madonosaka Syncline On-shore 11.5 km 2 1.5 km layer, Ohminato sand layer and Tefla layer Figure 2 and Attachment 13 distributed in Yasuda layer 1：Length described in the past documents, 2：Length identified by the geological survey, 3：Distance between the center of power station site and the center of the fault

Table 8 Evaluation of Faults which does not Consider in the Anti-earthquake Design (Inside the site) Kashiwazaki Kariwa Nuclear Power Station

No. Name Reason which Denies Activeness of the Fault Remark

Table 9, Figure 3 and ① α・β Faults The fault exists in only the low angle small fault in Yasuda layer. The fault does not extend to the upper part. Attachment 14

There is no displacement in the boundary between Yasuda layer and Nishiyama layer. The fault does not extend to Table 9, Figure 3 and ② V System Fault Yasuda layer. Attachment 15

The fault gives some displacement in the upper face of Nishiyama layer. However, the displacement disappears Table 9, Figure 3 and ③ F System Fault when it comes in Yasuda layer. F system fault and V system fault are crossed each other. Attachment 16

It is a land sliding fault and there is no displacement in the boundary between Yasuda layer and Nishiyama layer. Table 9, Figure 3 and ④ ①・② Fault The fault does not extend to Yasuda layer. Attachment 17

Table 9, Figure 3 and ⑤ L1・L2 Fault The fault does not extend to Yasuda layer. Attachment 18 No. Name

Sado City Sado Island Shelf East ① Hosogoe Fault

Madonosaka Niigata City ② Syncline

Sado Island Shelf East Legend Legend Tokyo Electric Power Company Tokyo Electric Power Company Nagaoka Plane East Edge Fault Zone Reverse Fault Madonosaka Syncline Saphenous Fault Nagaoka Plane West The Headquarters for Earthquake Promotion (2005) Active Anticline Sado Island Southend Active Fault (activity certain after late Quaternary) F-B Fold Zone Active Flexure edge Fault Zone Active Fault (activity uncertain after late Quaternary) Northern Sado Island Sea Bed Geological Map (1995) Active Fault Detailed digital Map (2002) Southern Sada Island Sea Bed Geological Map (1994) F-D Fold Zone Active Fault (incl. estimated fault) Eastern Noto Peninsula Sea Bed Geological Map (2002) New Edition Active Fault in Japan (2002) Reverse Fault (dash line saphenous) CertaintyⅠ Gravity Fault (dash line:saphenous) Takada Offshore Fault CertaintyⅡ Non Segmented Fault CertaintyⅢ (fuzzy side: descent side, dash line: saphenous) Kashiwazaki Kariwa NPS Quaternary Reverse Fault Atlas (2002) New Edition Active Fault in Japan (1991) Fault location certain Active Fault (relative elevation more than 200m) Fault location uncertain Active Fault (relative elevation less than 200m) Displacement not visible Estimated Fault (relative elevation more than 200m) Estimated Fault (relative elevation less than 200m) Active Structure Niigata (1984) Around Japan Sea Area Quaternary Construction Map (2001) Active Fault Estimated Active Fault Reverse Fault

Tookamachi Jouetsu City Fault, not considered its activity, No. Fault Zone

Figure 2 Map of Faults and Lineament around the Site of KK Nuclear Power Station Table 9 List of Layers in the Site

Era Bed Name Major Facies/Lithological character

Younger Stage Upper: gray colored small to medium sand Helocene Layer of Sand Lower: brown colored small to medium sand, humic matter contained Banjin layer of Sand Gray to red rust colored harsh sand

Oominato Bister to yellow bister colored medium to layer of Sand harsh sand, includes thin layer of shilt Late Quaternary Sand covered surface

Pleistocene A layer 4 Cray to shilt, clip many sands

Yasuda layer Clay to shilt, clip many sands A layer 3 Streaky clay, organic matter, sandy shell fossil

Clay to shilt, clip many sands A layer Middle 2 Sand, thick sand gravel, organic matter

Clay to shilt, clip many sands A layer 1 Sand, thick sand gravel

Early Haidsume layer Tuffaceous mudstone, tuffaceous sandstone, tuffaceous rock

Sandy mudstone N layer

ihym layer Nishiyama 3 Sandstone, tuffaceous rock, clip nodjule shell Pleiocene the Neocene fossil Late Shilt mudstone N layer Streaky mudstone, tuffaceous rock, many 2 nodjule Shilt to clay mudstone

N1 layer Sandstone, tuffaceous rock, clip nodjule Early siliceous sponge fossil Sandstone, Sandstone-mudstone layer, clip Miocene Suitani layer granule rock Late Teradomari layer Black mudstone, sandstone-mudstone layer Middle

nonconformity interfinger

No. Name

Legend

Late Pleistocene Yasuda layer ① α・β Fault Early Pleistocene Haidzume layer Nishiyama layer (N member) Pliocene 3 Nishiyama layer (N2 member) Nishiyama leyer (N1 member) ② V System Fault 3u Reactor Building 4u Reactor Building Fault (dash line : estimate) Tuffs Banded mudrock ③ F System Fault Cleavage band 1u Reactor Building 2u Reactor Building Boring point Eng : pit name Horizontal boring ④ ①・② Fault Vertical boring Boring location (for the year 2007, 2008) ⑤ ・ L1 L2 Fault

(a) Horizontal Cross Section Diagram of Geological Features around Unit 1 to 4（At －40m elevation） Area of Horizontal Cross Section Diagram of Geological Features around Area of Horizontal Cross Section Unit 1 to 4 Diagram of Geological Features around Unit 5 to 7

7u Reactor Building 6u Reactor Building Legend 5u Reactor Building Late Pleistocene Yasuda layer Pliocene Nishiyama leyer (N1 member) Manmade rock Fault (dash line : estimate) Tuffs Boring point (Eng : pit name Horizontal boring) Boring location (for the year 2007, 2008)

(b) Horizontal Cross Section Diagram of Geological Features around Unit 5 to 7 （At －25m elevation）

Figure 3 Distribution Map of Fault within the site Attachment 12 Faults, etc. around the Site ① Hosogoe Fault

Items Research Method Research Results Remarks

[New] Active Faults in Japan（1991）： Length: Approx. 7km, Likelihood: , Activitiy: Class B

Attachment 1Figuire Literature search ― Detailed Digital Maps of Active Faults（2002）: N/A 12－1

Active Structure Map- Niigata（1984）: N/A

Geomorphological Aerial Photographic Attachment Figure 12 Lineament ： Length Approx. 2, Direction: NE-SW, Category: LC・LD Research Interpretation －2

- A part of lineament is erosive. Surficial geology Ground Surface - North-western upper flexure structure on the Haizume layer is identified In the south-east side of the fault shown Attachment Table 12 research Exploration in the literature. However, the Kume layer widely distributing on the ground surface with the same structure has almost flat structure.

○ A part of lineament is erosive. Comprehensive ○ North-western upper flexure structure on the Haizume layer is identified in the south-east side of the fault shown in the literature. However, the Kume layer widely evaluation distributing on the ground surface with the same structure has almost flat structure. ○ It is judged from the above that it has not been active at least after the sedimentation of the Kume layer.

※：Terrain which has geomorphological deformation or its possibility

Attached Table 12 List of Geological Layer around the Site

Era Bed Name Major Facies/Lithological character Tephra Helocene Alluvium/Younger Stage Layer of Sand Gravel, Sand, Shilt, Cray, small to medium sand

LⅡ face sediment Gravel, Sand

Banjin LⅠ face sediment Gravel, Sand layer of Sand Medium sand Late MⅡ face sediment Gravel, Sand Oominato

Quaternary layer of Sand Medium sand MⅠ face sediment Gravel, Sand Pleistocene Yasuda layer Shilt, Cray, Sand H face sediment Shilt, Cray, Gravel, Oomegawa layer Sand Gravel, Sand Middle Wakinocho layer, Wajima Layer, Kume layer, Ootsubo layer, Shilt, Cray, Gravel, Sand Komanoma layer etc

Sand/Gravel/Mud rock layer Uonuma layer Early andesite volcanic extrusion Haidsume layer Sand/Mud rock layer, Sandy mud rock, tuffaceous mud rock

Pleiocene Late

Early Nishiyama layer Mud rock, sand rock/mud rock layer the Neocene

Suitani layer Sand rock/mud rock shale rock layer Andesite volcanic rock Late

Miocene Black shale rock, Sand/shale rock layer Teradomari layer Andesite volcanic rock Middle

Shichitani layer Hard shale rock, Sand rock, Gravel rock

Early Green tuffaceous rock, Andesite rock, Green tuff Dacite, Rhyolite

Granite rock, Paleogene Substratum Ultrabasic rock

※Yoneyama volcanic neck Index tephra (andesite volcanic extrusion) Discordance *For Wanatsu layer, northern part was included in Haidsume layer, south in Uonuma Layer. Heterotophic facies Niigata City t Niigata City l Legend u

a f Legend t Detailed digital map of active fault (2002) s a Vertical slip Strike slip Active fault★ E a t

m (Red) Certain u a ★ a y f Estimated Active fault River Bend (Blue) a t t s u Flexure a ★★ k E Linearment suspicious for active fault a Denudation/Artificial (Purple) a K Uncertain ★” reform Active Fault Japan (1978)”, “Active Structure of Shinetsu Area(1979)”, “Active structure- m (Green) a unknown Saphenous y

Niigata(1984)”, “New Edition Active Fault Japan(1991)”, and Yoshioka etc(1987) a

tilt u

★★ k configuration configuration and and location location Fault Fault

New Edition Active Fault Japan(1991) a Estimated active fault K Note) Contour is from 1/200,000 topographical map Geographical Survey Institute Tsubame City Quaternary reverse fault atlas(2002) Tsubakuro City Active fault (dash line is estimated fault)

Sanjyo City Active fault in the city, Nagaoka, Ojiya, Tookamachi (2002) Sanjyo City Active fault Estimated active fault

Note) Contour is from 1/200,000 topographical map Geographical Survey Institute ) u o y r u ) y lt -k u a o f u a h y c i f m o o t t l l n s i lt u u h a a u Mitsuke City f f e Mitsuke City a f d i (K n s e e m t a l o t t u g i s a a r e k f o w a e ShinanoShinano River River ( t T S o l

t ShinanoShinano River River l ig u u r a f a f o T ji a u m k a a y y u Kashiwazaki Kariwa NPS Kashiwazaki Kariwa NPS o y lt u J u y fa k u Nagaoka City a Nagaoka City k u o Y s i t m l o u t a i f m a a r tK a e l h i p u a k o l f e s a S

r w e a v i s r a i y h O s s t i l a u b a f a Kashiwazaki City Kashiwazaki City i S a n g o a t t a n e K m t r l a KatagaiKatagai fault fault au e f n LinearmentLinearment on on Shibukawa Shibukawa river river slopeslope a i m L ya e Ojiya City n o Ojiya City iy am lt K fau u s ts t oe l os lt u H a u f fa ii a m m G a an a k k y ai a fa o ult in t M o

t a l Y u YamamotoyamaYamamotoyama fault fault Uonuma City Uonuma City a f

d n e

t s e w t r l e u t a a f e d h t i n e h t p s m a a e

i r h e c t a a e m h Tookamachi City t a i k h o p o T m a i h c a

m a k o o T Appendix Figure 12-1 Active Fault Distribution Map of Neighboring Terrestrial Area according to Literature Legend Terrace LⅡ face

LⅠ face Niigata City

MⅡ face

MⅠ face H faces Linearment

legend rank

Tsubakuro City

Sanjyo City

Short line is lower side. Possible movement formation without short line indicates no significant discontinuity was observed on both side. Allow shows direction of strike slip. Steep part on the terrace. Allow shows direction of incline. Linearment number Note) Contour is from 1/200,000 topographical map Geographical Survey Institute Mitsuke City

Shinano River Kashiwazaki Kariwa NPS Nagaoka City

Kashiwazaki City

Ojiya City

Uonuma City

Tookamachi City

Appendix Figure 12-2 Interpretation of Aerial Photograph of Neighboring Terrestrial Area Attachment 13 Faults, etc. around the Site

② Madonosaka Syncline

Items Research Method Research Results Remarks

[New] Active Faults in Japan（1991）： N/A

Attachment Figure 12 Detailed Digital Maps of Active Faults（2002）: N/A －1 Literature search ― Active Structure Map- Niigata（1984）: N/A

Komatsu, Watanabe（1968）： West-upper Reverse fault of the frame of the Madonosaka syncline (No mention of

the length） Aerial Photographic Attachment Figure Lineament: N/A Geomorphological Interpretation 13-1 Research geomorphic analysis by Attachment Figure No relation between flexure structure（syncline and anticline） and terrain DEM 13-2 Surficial geology Ground Surface research Exploration There are north-western upper reverse fault in the Nishiyama layer and the Shiitani layer or asymmetrical syncline Geophysical Seismic exploration by structure (the Madonosaka Syncline) whose geological layer of the frame I steep slope. Attachment Table 13 research reflection method Attachment Figure The Yasuda layer unconformably covering the Madonosaka syncline, layers’ boundaries of the Ominato sand 13-3 Surficial geology layer, etc., the Atatorihama Tephra narrowly existing in the Yasuda layer has slight slope toward the east. Drilling survey research However, they accumulated almost horizontally and do not have deformation according to flexure structure before the Nishiyama layer or other old layers. ○ The Nishiyama layer and the Shiitani layer have asymmetrical syncline structure (the Madonosaka Syncline) of steep slope, however the tephra layer narrowly existing in the Yasuda layer and the Ominato sand layer, which unconformably cover the syncline, do not have deformation. Comprehensive ○ north-western upper reverse fault in the Nishiyama layer and the Shiitani layer or asymmetrical syncline structure (the Madonosaka Synclin evaluation ○ It is judged from the above that asymmetrical syncline structure which the Madonosaka is estimated to have has not been active at least after the sedimentation of the Yasuda layer.

Appendix chart 13 Stratigraphic Profile of Neighboring Area

Stratigraphic division in the continental area Era Stratigraphic division tephra (teradomari/ nishiyama hill) (middle hill south) in the sea area

Helocene Alluvium/Younger Stage Layer of Sand layer

Banjin

Late layer of Sand

Quaternary layer

Pleistocene Oominato layer of Sand Yasuda layer Middle

Oomegawa layer layer

Ootsubo layer

Early layer

Haidsume layer

Inagawa discordance*2 Late Pleiocene

the Neocene Yoshii discordance*2 layer

Nishiyama layer Early (Hamachuu layer lower part)

Suitani layer layer Miocene Teradomari layer

Name and ara of tephra is from Kishi etc (1996) Name of discordance if from Kishi etc (1996) Yoneyama volcanic rock/dou volcanic rock widely locate on Yoneyama shore and in the Nishiyama layer south of Kashiwazaki City.

Legend terrace mark L face Ⅱ L face Ⅰ M face Ⅱ MⅠ face H faces

Kashiwazaki Kariwa NPS

Appendix Figure 13-1 Interpretation of Aerial Photograph of Neighboring Terrestrial Area Legend terrace mark L face Ⅱ L face Ⅰ MⅡ face Ushirodani anticline Madono syncline MⅠ face H faces Nagamine anticline

Kashiwazaki Kariwa NPS

Scope of Altitude/Slope Chart

[2] Altitude/Slope Chart around Madonosaka Syncline

[3] Geological Cross-section around Madonosaka Syncline

[1] Interpretation of Aerial Photograph around Madonosaka Syncline Appendix Chart 13-2 Results of Survey on Madonosaka Syncline Legend Alluvium/ soil bank Cross sectional line Younger stage sand layer Ushirodani anticline Madono Syncline Nagamine anticline Syncline axis MⅡ face sediment (MIS5c) Banshin sand layer (MIS5d-4) Anticline axis Altitude (m) Altitude Altitude (m) Altitude Oominato sand layer (MIS5e) Bedding plane strike/dip Yasuda layer upper (MIS5e) TEPCO reflective earthquake survey line vibrator Yasuda layer lower (MIS5e) H face sediment (MIS7) TEPCO reflective earthquake survey line impactor Ootsubo layer TEPCO bay cable survey line Haidsume layer Boring point (TEPCO) Legend Haidsume layer (calcareous sandstone) tephra Nishiyama layaer Boring point (Ground map Niigata prefecture Haidzume (2002)) layer (H) Suitani laer Nishiyama layer(N) Teradomari layer Suitani layer (S) Iz tephra (o survey point) Teradomari layer (T) Ax tephra Note) Name of tephra is from “Kishi (1996)” Zn tephra Name of tephra is from “Kishi etc(1996)” Distance (m)

(2) Depth section and interpretation of N-1 survey line

Altitude (m) Altitude Altitude (m) Altitude

Legend Alluvium layer Kashiwazaki Oominato sand, Banshin sand layer Yasuda layer Kariwa NPS tephra Nishiyama layer(N) (3) Depth section and interpretation of N-2 survey line Suitani layer (S) Note) Name of tephra is from “Site survey ““Kishi Madonosaka syncline (1996)” 10-b e No. ain lin ma m Gunn igata Altitude (m) Ni Altitude (m) Distance (m) Banshin sand layer/ Oominato layer Banshin sand layer/ Oominato layer

Valley sediment Yasuda layer Alluvium Yasuda layer Nishiyama layer Shiitani layer Haidzume layer Nishiyama layer Nishiyama layer Yasuda layer

Distance (m)

(4) Result of boring investigation along N-2 survey line

Madonosaka syncline

Altitude (m) Altitude (m)

Younger sand layer Bank soill

Banshin sand layer/ Oominato layer

(1) Geological map and geological investigation location map Crystalline tephra around Madonozaka Syncline Atatoriyama tephra Yasuda layer Nishiyama layer Appendix Figure 13-3 Investigation Result of Madonozaka Syncline

(5) Result of boring investigation on a premise Appendix 14 Fault etc. in the site ① α・β fault

Survey Item Survey Method Survey Result Remarks

Bibliographic ― Fault Description : N/A Survey Geomorphological Aerial Photograph Lineament : N/A Survey Interpretation Ground Surface Ground Surface Fault Outcrop : N/A Geological Survey Exploration Developed Slope Slope Geological Attachment Drawing 14-1 Stopped at low angle fault of Yasuda Layer, no upper continuation Survey Observation Attachment Drawing 14-2 Vertical Shaft Shaft Wall Geological On β fault, no slip in the crushed stone or asphalt of the temporary yard for construction at the time of Attachment Drawing 14-3 Survey Observation Chuetsu Oki earthquake ○ α fault is stopped at low angle fauld of Yasuda Layer and no upper continuation is recognized, so we evaluated that at least there is no activity after the deposition of Yasuda Layer. General Evaluation ○ β fault is stopped at low angle fauld of Yasuda Layer and no upper continuation is recognized, so we evaluated that at least there is no activity after the deposition of Yasuda Layer.

Younger stage Sand layer Yasuda layer A member 4 α fault outcrop

Japan Sea th ow gr ite on North East point of 1u R/B Lim

Younger sand layer Shilt - Cray

Yasuda layer A3 member

Discordance plane Shilt

and red s colo Bark

Dark gray shilt/medium harsh sand (humic env) Low angle small fault

Humic matter contained shilt

Gravel mixture shilt αfault

(1) Outcrop Sketch of α Fault (Northern developed slope of Unit 1 Reactor) (2) Location Map of α Fault Outcrop

Attachment Drawing 14-1 Developed Slope Survey Result of α Fault

βfault outcrop

Japan Sea North East point of 1u R/B

Shilt

Yasuda layer A3 member

Low angle small fault

βfault

(1) Outcrop Sketch ofβ Fault (Northern developed slope of Unit 1 Reactor) (2) Location Map of β Fault Outcrop

Attachment Drawing 14-2 Developed Slope Survey Result of β Fault

Detrital rock

Mudrock (Nishiyama layer)

βfault Altitude(m) Altitude(m)

βfault

Legend

Crack Falling Sand boiling

Fault considered not active at the time of approval Downdip projection of the Fault recognized at basement construction on the ground surface Downdip projection of the estimated Fault found boring survey on the ground surface Vertical projection of the low angule Fault recognized at basement construction Small-medium Vertical shaft survey point sand Legend Trench survey point Asphalt Detrital rock (bank soil) βfault Gree-gray sandy mudrock Ground surface (smallmedium) Humic matter Vertical shaft Ichnolite (bioturbation) Pumice stone Blue-green-gray mudrock Liner plate Brown mudrock Dark green-gray mudrock Depth Horizontal shaft for survey Fault

Faceless fault β fault Joint

Direction/incline of fault plane Bedrock Attachment Drawing 14-3 Vertical Shaft Survey Result of β Fault Brown mudrock

Attachment 15 Faults etc. in the Site ○2 V Faults

Survey Item Survey Method Survey Result Remarks

Bibliographic Survey ― Fault Description： N/A

Geomorphological Aerial Photographic Interpretation Lineament： N/A Survey Ground Surface Ground Surface Exploration Fault Outcrop： N/A Geological Survey

As the result of the survey on 3V-1 and V2 layers where they have relatively wider fracture surface and Attachment Drawing 15-1 Test Pit Survey Test Pit Geological Observation greater drop, there is no displacement at the boundary face between Yasuda layer and Nishiyama Layer, Attachment Drawing 15-2 and no continuation in Yasuda Layer. Vertical Shaft Wall Geological There is no displacement at macadam and asphalt in temporary yard for construction even at the time of Vertical Shaft Survey Attachment 15-3 Observation Chuetsu Oki Earthquake.

○ 3V-1Fault has no displacement at the boundary face between Yasuda and Nishiyama Layer, and no continuation in Yasuda Layer. Comprehensive ○ V2 Fault has no displacement at the boundary face between Yasuda and Nishiyama Layer, and no continuation in Yasuda Layer. Evaluation ○ From the above, we evaluated that at least there is no activity of V Faults after the deposition of Yasuda Layer.

3V-1 Pit Final Face

Yasuda layer 4u R/B

Legend ihym layer Nishiyama D Shilt iscordan ce plane Sand Yasuda layer Legend Mudrock gravel Erastic wave testing point Deformation/bearing capacity testing point Bedrock shear testing point Bedrock creep testing point Mudrock Nishiyama layer 3V-1 fault Boring/PS logging point (No.: boring pit name)

Test boring sampling point

(1) Sketch of Final Face at 3V-1 Pit (2) Location Chart of Final Face at 3V-1 Pit

Attachment drawing 15-1: Result of Test Pit Survey of 3V-1Fault

V Pit Final Face 2

Forepole

V2 fault N55W84N Yasuda layer(A3 member)

Nishiyama layer plane top N30E87E shearing plane

N35E66E shearing plane

Nishiyama layer

V fault N48W88N Erastic wave testing point Weathered zone 2 Deformation/bearing capacity testing point Bedrock shear testing point Bedrock creep testing point Boring point (No.: boring pit name) Test boring pit sampling point Test pit(T.P-25m/ -30m) Test pit (other than described above) (1) Sketch of Final Face at V2 Pit (2) Location Chart of Final Face at V2 Pit

Attachment 15-2: Result of Test Pit Survey of V2 Fault

Concrete 【 Deep foundation side wall 】

Crushed rock

Nishiyama layer mudrock

it un 3 3V-5 fault

3V-5 fault Legend

Crack Falling

Sand boiling 3V5 Deep foundation

Fault considered not active at the time of approval Ground surface Downdip projection of the Fault recognized at basement construction on the ground surface Downdip projection of the estimated Fault found boring survey on the ground surface Vertical projection of the low angule Fault recognized at basement construction Backfilling soil thickness Vertical shaft survey point Trench survey point Concrete (A) thickness Legend Paving thickness Concrete Crushed rock Artificial sediment Nishiyama layer mudrock t Crushed mudrock i 3 un Black lamina C Humic matter onc rete 1 (B) Nodule Nishiyama layer .40m Massive mudrock Rubble fragmentation s Direction/incline of fault plane easide 3V-5 fault Attachment Drawing 15-3: Result of Vertical Shaft Survey of 3V-5 Fault Attachment 16

Faults etc. in the Site ○3 F Faults

Survey Item Survey Method Survey Result Remarks

Bibliographic Survey ― Fault Description： N/A

Geomorphological Aerial Photographic Lineament： N/A Survey Interpretation Ground Surface Ground Surface Fault Outcrop： N/A Geological Survey Exploration

As a result of survey on F2 Layer where there is relatively large scale and continuity, it is observed that Test Pit Geological Attachment Drawing 16-1 Test Pit Survey there is a displacement at the upper end of Nishiyama Layer, however, the displacement is disappeared Observation Attachment Drawing 16-2 soon in Yasuda Layer, and the F2 Fault and V2 Fault are connected with intercepting each other. Vertical Shaft Wall Vertical Shaft Survey F3 Fault has no displacement in Yasuda Layer even when Chuetsu Oki Earthquake. Attachment Drawing 16-3 Geological Observation

○ F3 Fault has a displacement at the upper end of Nishiyama Layer, however, it is disappeared soon in Yasuda Layer. Comprehensive ○ F3 Fault and V2 Fault are connected with interfering each other. F2 Fault was formulated at the almost same time as when V2 Fault was formulated. Evaluation ○ From the above, we evaluated that at least there is no activity of F Series Faults after the deposition of Yasuda Layer.

Last face

ole Forep Scaffolding ole Forep Yasuda layer (A member) Nishiyama layer top plane 2

ayer iyama l Nish e Forepol Forepole

Erastic wave testing point Deformation/bearing capacity Final Face of F2 Pit testing point Bedrock shear testing point Mudrock gravel layer (Yasuda layer) includs sand in matrix Bedrock creep testing point Boring point (No.: boring pit name) Without cray. Disappear after 20cm continuity. Test boring pit sampling point Test pit(T.P-25m/ -30m) Test pit (other than described Without cray. Disappear after 20cm continuity. above)

(1) Northern Wall Sketch of Final Face of F3 Pit (2) Location Chart of Final Face of F3 Pit

Attachment Drawing 16-1: Result of Test Pit Survey of F3 Fault

fault

fault fault fault fault fault

fault

pit Vertical fault

fault

Attachment 16-2: Joining Section of F Fault and V Fault

Altitude (T.P.) (m) Altitude (T.P.) (m)

【 Horizontal pit south wall 】【】 Horizontal pit north wall

【】 Southwest wall

Yasuda layer

Yasuda F f Nishiyama layer layer 3 ault

F3 fault F3 fault Nishiyama layer

Legend Crack Vertical pit Falling Ground surface Legend Sand boiling Shilt layer Fault considered not active at the time of approval Humic matter Yasuda Downdip projection of the Fault recognized at Backfill soil layer basement construction on the ground surface Mudrock rubble thickness 11.8m Downdip projection of the estimated Fault Diameter 3m found boring survey on the ground surface Mudrock nodule Asphalt plane Nishiyama Vertical projection of the low angule Fault layer recognized at basement construction thickness 0.05m Mudrock Paving Vertical shaft survey point Fault fragmentation thickness 0.7m Trench survey point Direction/incline of fault Yasuda layer Direction/incline of fault Southwest wall Horizontal pit

Nishiyama layer F fault 3

Attachment Drawing 16-3: Result of Vertical Shaft Survey of F3 Fault Attachment 17

Faults etc. in the Site ○4 Faults ○1 and ○2

Survey Item Survey Method Survey Result Remarks

Bibliographic Survey ― Fault Description：N/A

Geomorphological Aerial Photographic Interpretation Lineament：N/A Survey Ground Surface Ground Surface Exploration Fault Outcrop：N/A Geological Survey

As the result of the survey on Fault ○1 , the Fault has no displacement at the boundary face Attachment Drawing 17 Test Pit Survey Test Pit Geological Observation between Yasuda and Nishiyama Layers, and no continuation in Yasuda Layer.

Boring Survey Boring core observation Fault○1 and Fault○2 are connecting faults where they show annular shape on the same plain.

○ Fault○1 and Fault○2 have characteristics of landslide and are connecting faults where they show annular shape on the same plain. Comprehensive ○ Fault○1 has no displacement at the boundary face between Yasuda and Nishiyama Layers, and no continuation in Yasuda Layer. Evaluation ○ From the above, we evaluated that at least there is no activity of Fault○1 and Fault○2 after the deposition of Yasuda Layer.

Southern Wall of Pit

layer Yasuda

4u R/B - Discordance plane

ihym layer Nishiyama

T fault flexure

Legend Legend Shilt Erastic wave testing point Sand Deformation/bearing capacity testing Yasuda layer point Sand Bedrock shear testing point Mudrock gravel Nishiyama layer Bedrock creep testing point Humic Nodule Boring/PS logging point matter (No.: boring pit name) Test boring sampling point

(1) Sketch of Southern Wall of Pit (2) Location Chart of Pit ○1

Attachment 17: Result of Test Pit Survey of Fault○1

Attachment 18 Faults etc. in the Site

⑤ L1・L2 Faults

Survey Item Survey Method Survey Result Remarks

Bibliographic Survey ― Fault Description：N/A

Geomorphological Aerial Photographic Interpretation Lineament：N/A Survey Ground Surface Ground Surface Exploration Fault Outcrop：N/A Geological Survey Attachment Drawing 18－1 Test Pit Survey Test Pit Geological Observation No Continuation in Yasuda Layer Attachment Drawing 18－2

○ L1 Fault has no continuation in Yasuda Layer Comprehensive ○ L2 Fault has no continuation in Yasuda Layer Evaluation ○ From the above, we evaluated that at least there is no activity of L1 and L2 Faults after the deposition of Yasuda Layer.

L1 pit final face

Leged Erastic wave testing point Deformation/bearing capacity testing point Bedrock shear testing point Bedrock creep testing point Boring point (No.: boring pit name) New boring pit Existing boring pit Test pit (other than described above)

(1) Northern Wall Sketch of Final Face of L1 Pit (2) Location Chart of Final Face of L1 Pit

Attachment Drawing 18－1 Result of Test Pit Survey of L1 Fault

Fossil wood

Nishiyama layer

L fault Yasuda layer 2

L fault 2 Leged Erastic wave testing point Deformation/bearing capacity testing point Bedrock shear testing point Bedrock creep testing point Boring/PS logging point (No.: boring pit name) L pit final face New boring pit 2 Existing boring pit Test pit (other than described above)

(1) Northern Wall Sketch of Final Face of L2 Pit (2) Location Chart of Final Face of L2 Pit

Attachment Drawing 18－2 Result of Test Pit Survey of L2 Fault

Reference2参考 2

Legend Faults considered activeness

Sado City

Niigata City Sado island shelf Kakuta/yahiko fault

east fault e

e t l w

fau e Sado island n d a n l e p south fault t s lt a

F-B bent zone k e u a o t w f l

a e a u ) g a d t y f i l i a s u m a l N l a o i f m n h ji i a o h y u ku e u h a K u F-D bent zone r y C k o J u r ( u Kashiwazaki Kariwa NPS r lt a n a Y e e a e n n f n o d i k t la t n a n p e n u e g o Kashiwazaki City i t e z m k s a a r a a t m n Takada offshore fault a z e a r a m lt e a a a u n w th K H y a i i t e e f L h u l n o in o s u y a s L i K a m f a lt Gankai fault K u a fa i m m a ka y a o in t M o

m e d Ya i ne s l o l z i t Jyoetsu city h l i u h a f c a m nd a e

k t s oo e T w

Reference Drawing : Distribution Map of Fault which is considered for seismic design around Kashiwazaki-Kaiwa Nuclear Power Station