DISTRIBUTION:Documemt Control (50-390)

JI 4 NRC PDR DGuptaL PDR EAdensamNSIC GLearPRC LHeller

Docket Nos. 50-390/391 LB4 ReadingMDuncanMMillerMYoung, OELD

APPLICANT: Tennessee Valley Authority REJacksonRLRothman

FACILITY: Watts Bar Nuclear Plant, Units I and 2 JLKingJXimball

SUBJECT: SUMMARY OF MEETING TO DISCUSS LIQUEFACTION OF THE SOILSBENEATH THE ERCW PIPELINE

A meeting was held in Bethesda, MD on May 20, 1983, to discuss liquefaction ofthe soils beneath the ERCW pipeline at TVA's Watts Bar Nuclear Plant, Units 1 and2. A list of attendelis is included as Enclosure 1.

In the first haf of the meeting, TVA presented both empirical and theoreticalground motion results analyzing the potential for peak acceleration amplifica-tion in the soils at Watts Bar, a shallow soil site. The slides are includedas Enclosure 2i With respect to the theoretical results, TVA concluded that anincrease in the shear wave _`velocity contrast between the rock and soil, aboveabout 3 to 1, does not significantly affect peak acce!peration amplification.They also concluded that the shear wave Ivelocity of the soil is the criticalparameter, not the contralt between the soil and rock. The staff questionedTVA regarding some of the assumptions used in the theoretical analysis andrequested that the specific computer input and output be provided for exami-nation.

TVA also presented information and review of empirical results utilized bythe staff to estimate a range of peak acceleration for the soil (0.35g to0.42g), TVA stated that the references cited by the staff did not use enoughdata to be statistically significant. The staff stated that other empiricalinformation was available which also showed peak acceleration amplificationat shallow soil sites.

The second part of the meeting concerned discussion of TVA's remedial fix tothe potential liquefaction problem. TVA indicated that they have analyzed theliquefaction potential of soils below the water table in all the borings alongthe ERCW pipeline. For these analyses, they used the 1979 Seed and Idrissprocedure with a maximum horizontal acceleration of 0.4g at ground surface.*7VA found, in using their analyses criteria, that soils may liquefy in severalareas along the ERCW pipelines. One of the susceptible areas i,,§ found to becontinuous and near sloping ground close to the ERCW pumping station (betweenborings #49 and #141). In other areas, the liquefaction - susceptible soils areeither isolated or under very flat ground. TVA indicated that they would providefield remedial measures to stabilize the area between the pumping station andboring #141.

8306160060 830606-- PDR ADOCK 05000390

A PDR"... .................. ....i!!!!i!!!!!!........................ . . . . ..URNAME ....................... .................................................................. ............................................

.. ATE ........................... .................................................................. ...........................................

NRC FORM 318 (10-80) NRCM 0240 OFFICIAL RECORD COPY USGPO: 1981-335-960

-2-

TVA proposed to construct underground barriers along the ERCW pipelines on the sideof the sloping ground. The proposed alignment and cross-sect 'on of the barriersare shown in Enclosures 3 and 4. The purpose of the barriers is to contain thesoils in case of any liquefaction in this area. TVA stated that they would designthe barriers to withstand 0.4g maximum ground acceleration. The present designof the barriers show that these would be about 100 feet wide at the base and about25 feet deep from the surface to the underlying shale deposit. The distance ofthe barriers from the ERCW pipelines would vary from 50 feet to 500 feet. Denselycompacted barriers would be formed by compacting the material excavated from thelocation of the barriers. The compaction criterion would be 95% standard Proctordensity. TVA proposes to fill the depression in the area between the groundsur'face at the location of the pipelines and the top of the barriers.

TVA also indicated that they have analyzed the potential seismically-inducedsettlements of soils at the location of borings along the ERCW pipelines. Forthese analyses, they have used the method proposed by Lee and Albais~a (1974 ASCEGeotechnical Engineering Journal). However, since they do not have laboratorytest data on soils to be used in these analyses, they have used lab data forMonterey sand given in the said paper. Their results show that a maximum of1.5% volumetric strain may be used for estimating seismic settlements.

TVA stressed the urgency of coming to a resolution on this liquefaction issueso that remedial work may be complete by fuel load (01/03/84). The meetingclosed with the NRC indicating that in a week TVA would receive a peak accelera-tion, or "9g value, and an indication as to the adequacy of their remedial fix.

Melanie-A. Miller, Project ManagerLicensing Branch No. 4Division of Licensing

Enclosures:As stated

cc w/enclosures:See next page

oP,•iCE •D.'LB#V• ... o...... '...'FJ E Q L. :I.. N .. ............... ......... ........................ ........................ I ........................ ........................SURNAMEO ....~ ~ k EAdensam

. . . I............................... .. ..... . ........................... ..................N C FC ........09 ........................ ..................... ... ....................... ........................ ........................

OFFICIAL RECORD COPYNRC FORM 318 (10-80) NRCM 0240 USGPO: 1981--335-960

WATTS BAR

Mr H. G. ParrisManager of PowerTennessee Valley Authority500A Chestnut Street, Tower IIChattanooga, Tennessee 37401

cc: Herbert S. Sanger, Jr., Esq.General CounselTennessee Valley Authority400 Commerce AvenueE11B33Knoxville, Tennessee 37902

Mr. W. LuceWestinghouse El ectric CorporationP.O. Box 355Pittsburgh, Pennsylvania 15230'

Mr. Ralph ShellTennessee Valley Authority400 Chestnut Street, Tower IIChattanooga, Tennessee 37401

Mr. Donald L. Williams, Jr.Tennessee Valley Authority400 West Summit Hill Drive, Wl0B85Knoxville, Tennessee 37902

Resident Inspector/Watts Bar NPSd/o U. S. Nucl ear Regul atory

Commi ssionRt. 2 - Box 300Spring City, Tennessee 37831

Mr. David OrmsbyTennessee Valley Authority400 Chestnut Street, Tower IIChattanooga, Tennessee 37401

James P. O'Reilly, Regional AdministratorU.. Nuclear Regulatory Commission,

Region II101 Marietta Street, Suite 3100Atlanta, Georgia 30303

Enclosure I

MEETING ATTENDANCE

Name

Robert E. Jackson

Robert L. Rothman

Jerry L. King

Vincent A. Bianco

R. 0. Barnett, Jr.

R. J. Hunt

Samuel D. Stone

Jeff Kimball

Dinesh Gupta

E. G. Adensam

G. Lear

L. M. Mills

D. P. Ormsby

C. Y. Chang

W. M. Seay

H. Ray Threlkeld

Lyman Heller

W. D. Kovacs

I. M. Idriss

Affiliation

NRC

NRC

NRC

TVA

TVA

TVA

TVA

NRC

NRC

NRC

NRC

TVA

TVA

Woodward-ClydeConsultants

TVA

TVA

NRC

National Bureau ofStandards

Woodward-ClydeConsultants

NRCM. A. Miller

0

ENCLOSURE 2

--------0-

i/

i-

I

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I../

/

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1//

04Ca 0-3

-- VaJ.... ~ t

0o4

0.3

5: -

Table 2

Selected Recordings for Site Specific ML 5.8 +0.5 Data Set

EARTHQUAKE

I.YTLE CREEK,CALIF.

FRIULI SEQUENCE

DATE T IMEY M D H M S

70 912 63053

76 5 9 05348

MAGN ITUIDEM[B ML MS

5.2 5.4

5.1 5.5

FRIULI SEOLENCE 76 511 2244 2 5.2 5.3

FRIULI SEOLUENCE 76 911 163112

IFRI UL I

rR-N*IL)LI

FR I UL I

FR I%' UL I

SEOUENCE

SEQUENCE.

SEOUENCE

5.2 5.5 5.5

1635 0

31519

92118

DEPT r RECORDINf$ STATION(KM)

8.0 6074 PARK DRIVEwRIGIHrWOOD, CA

1.0 FORGARIA-CCRN. ,ITALY

MAIANO (CNEN),ITALY

TOLMEZZO, ITALY- ENEL. FIXED

19.0 FORG¢ARIA..CORN. ,I TALY

MAIANO (CNEN),ITALY

TARCENTO, ITALY

'OIi MEZZO, ITALY- ENEL. FIXED

9.0 FORGARIA-CORN.,ITALY

I ARCENTO, ITALY

6.0 FR'GACIRA-CORN. ,I TALY

9.0 FOR¢GARIA--I cRmN. ,I FAIY

12.0 TARCENIO, ITALY

F'OGAF. YA-CORN ,IrIALY

USGS SITE IDISTANCE TO:STAT

NO

290

8014

8015

8012

8014

8015

8011

8012

8014

0011

8014

8014

8011

8014

CLAS

BAD

AC.B

ABD

AUB

ACE,

APE'

ADD

ADD

ADD

ADID

AL:B

APiP

HYFOC(KM)

15.4

25.2

24.8

22.0

21.3

22. 4

22.3

23.2

18.2

11.7

15.7

13.5

22.5

23.3

EPIC(KM)

13.2

25.2

24.0

22.0

9,7

11.8

11.7

13.4

15.8

7,5

14.5

10.0

19.0

20.0

RUPT RECORD(KM)

W334U334

F051F051

F:05;2F052

F054F054

F059F059

F060F060

F061F061

F063F063

F131F131

F7133F133

F130F138

F152F152

F172F172

F168F168

FEAK ACCELCOMP VOL I VOL 2

(G) CM/S/S

6657E .146 139.0$25W .205 194.4

NORT .043 42.2EAST .037 34.7

NOR1 .004 80,IEAST .048 44.9

NORT .041 36.2EAST .035 31.3

NORT .190 182.7EAST .308 299.4

NORT .075 68.6EAST .082 67.5

NORT .036 35.0EAST .077 69.6

NORT .030 27.8EAST .032 26.9

NORT .095 92.1EAST .115 105.6

NORT .204 201.6EAST .105 93.9

NORT .131 119.7EAST .233 223.7

NORT .263 255.0EAST .218 208.0

NORT .139 135.1EAST .110 108.3

NORFNT .353 337.5EAST .335 323.8

LIVERMORE SEGUE 80 124 11 0 9NCE : SHOCK A

5.9 DEIE VALWIE DAM 1265 ABP 25.9 25.2 12.9 I.A23 S66W .240 249.9LA23 S24E .140 126.75.3 5.9 5.9

'1000- She.rWave Veloci f fpI01000

"40.. 0 5000.• " -- -•o sooo

w75

125

~de

150

15

" • .~ ~~10 0 .• ' - "

.125•

200-

EXPLANATION

Range of measured velocityalong ERCW pipeline

Figure 2- Overplot of Shear Wave Velocity Profiles for SelectedRecording Stations

-- Z. •.: ... ' "'

7000

1--/ .-

11

;ee4-?*nse-cAnd

- -S/sea..-- k. 74,~ Vc4~.3 , .. L•~ (~)

2000 4aao

I

shear Wr:v veoc)

to

-1

70 -

0

-Vs ROCK

V6 SOIL6

• ai•I

b

I

EXPLANATION

Temblor scaled to 0.18 g

Q Friuli scaled to 0.18 g

Vs SOIL - 1000 fps

2UUU 4000 6000 8000 10000 12000

Vs ROCK, feet per second

I. I,

3gr

0.4

0~

0 o2

+ "0.1

14000

4oo 1209

( s r" s oI

10 i

7o L.

0 ,-1000 1500 2000• i..I".

.0'>

0.4

4-

0.

0.0.2

0 Friull scaled to 0.18 g

Vs ROCK- 8.00VS SOIL

S,.-...... I I I I

2000 4000 6000 8000

Vs ROCK, feet per second.. 1I

oI0

EXPLANATION

[ Temblor scaled to 0.18 g

10000 12000 14000

Vs SOIL

CSZIAcl,*,>A -SW/J z4 I5v~L 4-~ -3 y C AMPvp~ a,64

S-7

6.6

6.6

C AM.)

-Ces

1.7

'•c~keAr'~sy4es '-

a. Zz

0./6

o.25

0. /.5~

~. 32

.10

0.1/

7-37

.28 02

0.4z ,1

S7-A r,,,O.VS

1.0

•0.9

~o 0.8Z:

7_ 0.71

0.5

0.3

0.2

0.1

0

! 1

" SAN FERNANDO EARTHQUAKE,1971, M = 6.6

A PACOIMA DAM RECORDS (MOD.),1971, M = 6.6

V KOYNA DAM EARTHQUAKE,"k - ".967, M = 6.5

ACAPULCO RECORDS,

.15965., M 6 8-- . 0 IMP-ERI:AL VALLEY EARTHQUAKE,- i--97,M= 6.6

•V "' "" "

2 4 7 10 20 40CLOSEST HiO'RIZONTAL DISTANCE FROIM ZONE

OF ENERGY RELEASE, mi

Wrl ,4A~d, KN kC (' 7 A

70 100

!

0.4F

$8

0

7 10 70 100CLOSEST HORIZONTAL DISTANCE FROM ZONE

OF ENERGY RELEASE, mi

0

I, I I

O0.

0.7

61-

0.5

0.4

0.3'

0.2

1 -

I B

20 .4o

g e o-•--_i, \- -.LL.s) .

I! i

.0-0

0.90

0 .80

g 0.60

C.)

<• 0.50

0Ni

' 01.40

10 Dnm:Rupture Distance, miles

San Francisco - 1957 ML = 5-3

Ferndale, CA. - 1975 M s = 5.7

Lytle Creek, CA. - 1970 ML = 5.4

Oroville, CA. -. 1975 M s = 5.6

Coyote Lake, CA. -. 1979r M§ ..&

Imperial. Valley Aftershock -1979' M s = 5.7

Campbell-,(91 E sitesý - Earthquakes with Magnitude 5h to 5%

SI L I ' I I . I I I i-a o a

Ar

I$ f.f I I

-. ~~~1 . .-.- 30 : " •=;__. ._..

0.30

0-20

0.10

U

0S

.30

300

Epicenteral Distance, km

Figure 6-1 Recordings from Friuli Sequence for Magnitude ML 5-3 to6.2

0 @0

CP

Rock Shallow Soil

Italian 0

0.1

0

- 0.03

CL0,

0.01

0.003

0.0011000.

- i @7

o'•--,,,me -

Shear Wave Velocity. V, (fps)S- 3000 4000

1: 0

20

200C

Rle 4

1000T

I

II

II

!3 Prof

7

I

Bedrock - Shale7f " 165 pcf

SHEAR WAVE VELOCITY PROFILES ALONG ERCW PIPELINE,WATTS BAR N.P. SITE

Fil or Alluvial Soil7- 122 p-f

Alluvial Sand.7-- 122 pcf

Alluvial Sand

" = 113 pcf

Basal GravelIf = 120 pcf

301-

.: . I ... ..I•i II

Weathered Shale-" = 127 pcf

rxvltn r-fr.%,,,,j/,*00O

I

40 ý

Table 1UPDATED SITE SPECIFIC TOP OF ROCK DATA SET

" SAN FRANCIscO

PARKELDE ,-CALIF.

LYTLE CREEK,'CAI, I

OROVILL9 CA

It1N SHPCK-

FRIULI SEQUENCE

FRI4 SEQUCNCE

FR FULI SEQUENCE

* FRIVIIJ SEQUENCE

COYOTt LAKE. ,CA

IMPERIAL AFTERS 791015HOCK A31

LIVERMORE SEQUE 80 124

NCE SHOCK A

MAMMOTH LAKES 80 525

SHOCK A

MAMMOTH LAKES so 525

SHOCK 8,

MAMMOTH LAKES 80 525SHOCK C

MAMMOTH LAKES 80 527

SHOCK 0

DATE TINE MAGNITUDEY N 0 H N S MB ML "S

57 322 114421 5.3

66 621 402614 5.S. 5.6 6.6

70 912 63053 5.1 5.o

6 1 122013

911 163112

911 1635 0

915 31519

915 92111

4 6 10 522

235863

11 0 9

93345

96927

126651

75057

8.9 5.7

5.2 5.5

5.3 5.9

5.7 6.1

5.4 6.0

5.3 5.7

8.5 507

5.9 5.9

6.1 6.1

6.0

6.1 5.0

6,2. 6.0

D(PlitIKH)

6 .5

8.0

8.0

8.0

9.0

6.0

900

12.0

9.6

9.1

5.9

13.•1

16.6

16.2

RECORDING STATIOI

SF GOLDEN GATEPARK

TEMOLOR CA IOLDSTATION PH[ 196'j)

ALLEN KANC04I

CEDAR SPRINGS MILL

DEVILS CANvONFILTER PLANT. CODR

DROVILLE SEISMOGRAP

,STATION

S ROCCO, ITALY

S. ROCCO$ ITALY

S. ROCCO, ITALY

So ROCCOv ITALY

COYOTE CREEK(C2171

GILROY ARRAYSTA l.

GILROY ARRAYI 6 SAN YSIDRO

SUPCRSTITIONMOUNTAIN

WALNUT CREEKFIDELITY SAVINGS

LONG VALLEY DANFREE FIELD

LONG VALLEY DAM

FREE FIELD

LONG VALLEY DA "FREE FIELD

LONG VALLEY OAMFREE FIELD

CONG TEMP STAT

AT PARADISE LODGE

USGS SITE DISTANCE TON STAT CLAS HYPOC EPIC 4UPT

NO .MM) (KNI IKM)

111 ABA '614* 11.i 9.5

1438 ABA 39.3 38.4 '9.9

a11 AAA 290.6 10*9"

116 AlA 2.•,1.9 20,:..6

S

PH 1051 AAA 146.9 12.6 9.5

6022 .ABA *~'17.9 16.5

8 0 22 + A : A 1 5

1 1 .

8022 AtA j , 12.1 9.0

802A AA.A 22.5 9,0o

1445 ABA 9.8 1.8 3.2

1608 ABA IB.6 157 . 9.3

1 '13 ABA. 1'.1 . .3.1

286 AAA 27.6 , 25.9

1530 DOA 2b.2 24.2 33.1

1666 A AA 156 12.

14666. AAA,:' 24. 204l

1446 AAA 19.9 11.9

1646 AAA 20 D..!-: 1 .0

19 AAA 26.5 20,0

PEAK ACCELRECORD COMP VOL 1 VOL 2

, IG) C~iSIS

A015 NIOE .105A015 SBO0 .121

8031 N65W ,2920037 S25W .411

W335 S8SE .086W335 S059 .o057

U337 SOUT ..164bi337 EAST •5.179

OSSA N53W.- .103OSSA' N37E .108

F132 MORT .042F132 EAST. .01

F139 NORT A091FI 39 EAST .o093

F153 NORT, .069F153 EAST .123

F169 NORT .146FI69 EAST .23b

rLO N7E01 .230.CLOI N20M .160

CL02 S40C .130CLO2 NSOE *100

CLO6 S40E .340CLO NSOE .420

A31K S45r .031A314 N45E .025

LA04 SOOE .027LAO4 SO0L .031

ML04 N9OL" .069ML04 NOOr .110

MLI4 490f ,.010NLI4 NO0E .000

ML23 N90C .062ML23 NOOL .110

ML33 N9oE .112ML33 NODr .243

ML36 S30E .1"19ML3t N60C .. *090

102.A

264.3340.6

6,.9

158.1162.0

103.2110.4

* 87.9

05.0

63.4

'136.2235*0

0

0.1 0.2 0.3PEAK ACCELERaTIaN (G'S)

PROFILESFRIULI-

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