ML20133F955

Advises That Results of Std Penetration Test Program & Confirmatory Testing Program Demonstrate That Facility Meets Licensing Commitment.Testing Program Described in & SER Confirmatory Item 6 Discontinued

ML20133F955
Person / Time
Site:	Vogtle
Issue date:	08/05/1985
From:	Bailey J GEORGIA POWER CO.
To:	Adensam E Office of Nuclear Reactor Regulation
References
0091-V, 91-V, GN-673, NUDOCS 8508080500
Download: ML20133F955 (38)

Text

r Georgia Pow:r Company Rout 3 2. Box 299A Waynaboro. Georgia 30830 Telephone 404 554 9961 404 724 8114 Southern Company Services, Inc.

Post Off ce Box 2625 Birmingham, Alabama 35202 Telephone 205 870 6011 Vogtle Project August 5, 1985 Director of Reactor Regulation File X7B635 Attention:

Ms. Elinor G. Adensam, Chief Log GN-673 Licensing Branch #4 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.

20555 NRC DOCKET NUMBERS 50-424 AND 50-425 CONSTRUCTION PERMIT NUMBERS CPPR-108 AND CPPR-109 V0GTLE ELECRIC GENERATING PLANT-UNITS l AND 2 SER CONFIRMATOFY ITEM 6

Dear Mr. Denton:

Attachment A to this letter contains the logs for the standard penetration soil test borings for category 1 backfill at the Vogtle plant site. The soil investigations were performed by Law Engineering Testing Company to a specification prepared by Bechtel Power Corporation. The standard penetration tests were made at 2.5 feet intervals in each of the 10 borings. The procedures for drilling and testing conformed to those discussed in "The Influence of SPT Procedures in Soil Liquefaction Resistance Evaluations by Seed, Tokimatsu, liarder and Chung.

Specifically, a safety hammer was used and it was raised by the rope and pully method. As can be seen, the results of these tests indicate a very dense fill.

Attachment B is a letter fron Dr. !!. Bolton Seed dated July 3, 1985, outlining his evaluation of standard nenetration test results described in Attachment A.

lie concludes that the. tow counts are consistent with a reasonably uniform fill.

Ile also concludes. hat there is no possibility of liquefaction occurring in this soil for any level of ground acceleration that may develop at the Vogtle site and liquefaction is simply not a credible mode of f ailure for this fill.

During a site visit by members of the NRC Staff on July 10-11, 1985, the results of the 1984 confirmatory testing program carried out to compare laboratories were evaluated. This evaluation demonotrated that even when the most conservative differences found in the confiriatory testing program were incorporated the Vogtle fill still meets the licensing commitments.

8500000500 050005 POR ADOCK 05000424 E

PDR 0091V

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Director of Reactor Regulation Files X7BC35 August 5, 1985 Log:

GN-673 Attachment C is a copy of the letter report from R. J. Serne of Battelle describing the results of laboratory measurements of distribution coefficients (Kd). The samples measured are of backfill material taken during the recent drilling and testing work at the Vogtle plant site. As can be seen from table 2, the Kd values determined for strontium and cesium are significantly larger than the values assumed by the NRC in their hypothetical spill analyses presented in their environmental statement (FES-OL, March 1985) and in the safety evaluation report (SER, June 1985).

In those reports they assumed values of 5 ml/g for strontium and 49 ml/g for cesium. These assumed values are stated by the NRC as being conservatively low, based on the literature.

The results of the laboratory measurements by Serne confirm that assumption.

'1he actual capacity of the backfill to retard migration of those two critical isotopes is approximately an order of magnitude greater than was assumed.

The high densities have been developed by the construction procedures used at the Vogtle site; therefore, Georgia Power Company plans to use the same procedures, for placing backfill, for the remainder of thn job and expects the same high quality of compaction.

The results of the standard penetration test program and the confirmatory testing program provide significant additiona', data demonstrating that the Vogtle fill meets the licensing commitment. The re f o re, the confirmatory testing program described in my letter of May 20, 1985, and the SER confitmatory item 6 will be discontinued.

If your staff requires any additional information, please do not hesitate to co1 tact me.

ours truly,,

.h.

J. A. Dailey Project Licensing Manager JAD/ coa Attachment xc D. O. Foster R. A. Thomas J. E. Joiner, Esquire B. W. Churchill, Esquire M. A. Miller B. Jones, Esquire (W/o Att.)

L. T. Cucwa G. Dockhold, Jr.

T. Johnson (W/o Att.)

D. C. Teper (W/o Att.)

L. Fowler W. C. Ramney

11. H. Gregory, III Vogtle Project File 0091V J

A TTW H M EN T A

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, -. - 4 con.mm I,5"$^.To$d'GEORGLA 30m 7

July 26, 1985 Southern Company Services, Inc.

P.O. Box 2625 Birmingham, Alabama 35202 Attention:

Mr. J. A. Bailey

Subject:

Standard Penetration Soil Test Borings For Category I Backfill Vogtle Electrical Generating Plant LETCo Job Number 7429 Gentlemen Law Engineering is pleased to submit boring logs for the soil test borings performed in Category I Backfill at Plant Alvin W. Vogtle.

The purpose of this exploration was to obtain specific subsurface data relative to backfill consistency and depth for Bechtel.

Additional borings, testing and installation of piezometers were perf ormed for Bechtel Power Corporation in accordance with their specification documents No. X2A Pol, Division C2, Sections No.18 and No. 19.

Ilow e v e r,

since they are preparing a separate report, their data has not been included.

All drilling and sampling in the aoil test borings was conducted according to applicable ASTM specifications and was performed by LETCo driller, Hezzle Collins.

Law Engineering's responsibilities in this work were limited to the execution of the requested drilling, laboratory testing and providing the necessary field engineering supervision so.that the quality of work could be maintained.

Laboratory grain size testing of soil sampics from the borings has been assigned by Bechtel and is presently underway in the laboratory.

. J

c,

,e Southern Company Services, Inc.

Page 2 July 26, 1985 We have enjoyed assisting Georgia Power in this work, and look forward to providing our services as the project continues.

If you have any questions, do not hesitate to contact us.

Very truly yours, LAW ENGINEERING TESTING COMPANY c'htry Jose Perez Geotechnical g.neer filiam A en Lancaster Civil Engineer Registered Georgia 7075

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Bechtel Power Corporation zia Yazdani I

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ELEV PENETRATION-BLOWS PER FOOT DEPfM (FT)

DESCRIPTION 201.70 s

to 20 30 40 50 60 80 100 BACKFILL-DENSE TO VERY DENSE RED BROWN SLIGHTLY SILTY TO SILTY FINE TO MEDIUM SAND O 43

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196.7 60 w

74 3

191.7 74

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186.7 63

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9 154 171.7 g 112 9 168 11 "

166.7 9 180 g 131 o

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5 10 20 30 40 50 60 80 100 DQfHtFT) g 9

BACKFILL-VERY DENSE RED BROWN SLIGHTLY SILTY TO SILTY FINE TO 9 158 MEDIUM SAND 156.7 9 159 9 171 151.7 g 182 g 100 5

146.7 g

4h" O.l.19.

1ST 6' 141.7 g 00 T

S gg, i

5" 136.7 gg IST 6

010_Q, 4"

131.7 gm IST 6" O 19.9.

73.5 3"

OBSTRUCTION-CONCRETE FRAGMENTS 126.7 gyqq i..

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2 ELEV PENETRATION-BLOWS PER FOOT DEgTH(FT)

DESCRIPTION 204.30 5

10 20 30 40 50 60 80 100 BACKFILL-DENSE TO VERY DENSE RED BROWN SLIGHTLY SILTY TO SILTY FINE TO MEDIUM SAND

%2N 199.2 o

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DATE DRILLED JOB NUMBER 7429 2

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~ 2 Soil Test Boring Record ELEV PENETRATION-BLOWS PER FOOT DESCRIPTION Dgy(FT) 164.40 5

10 20 30 40 50 60 80 1009 BACKPILL-VERY DENSE RED BROWN SLIGiTLY SILTY TO SILTY FINE TO MEDIUM SAND G162 159.3 g 3 79 i 11 "

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149.2

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134.C g

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9 104 0

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bn 75.7 VERY CLAYEY F NE SANDY SILTE 128.2 1

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I REMARKS:

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, 2, JOB NUMBER Soil Test Boring Record ELEV PENETRATION-BLOWS PER FOOT DESCRIPTION DEPgH tFT )

203.20 5

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198.2

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193.2 g l31 0 154 188.2 9126 g109 11 "

183.2 9124 g 100 5"

178.2 0 100 sh" 6100 5"

173.2 g 157 0.116.

10" 168.2 0 198 11 "

6 179 e

11 "

[ 40 163.2 g too 5*

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DESCRIPTION 163.2o 5

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158.2 9129.

4" S120 IST 6' 153.2 g 100 6"

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148.2 9 100 3"

O130 IST 6 "

143.2 O1b.1.

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G 136 IST 6' 138.2 0 131 I ST 6 "

O 1.99.

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72.0 73.0 MARL-SAMPLED AS VERY HARD *

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ELEV PENETRATION-BLOWS PER FOOT o PTH (FT)

DESCRIPTION 213.90 5

10 20 30 40 50 60 80 100 BACKFILL-DENSE TO VERY DENSE RED BROWN SILTY TO SLIGHTLY SILTY FINE TO MEDIUM SAND

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208.9 (v

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MI 198.9 9102 9114 193.9 9104 4120 188.9 9136 O 152 l

183.9 9153 i

l 9169 11" 178.9 9188 11 "

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REMARKS:

ser mev s ret ron rvet aNation or svueots ANO AssaEvlATIONS USED ASovE i

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a Soil Test Boring Record

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ELEV PENETRATION BLOWS PER FOOT OggH (FT)

DESCRIPTION 173.90 s

to 20 30 40 soso 80 100 BACKFILL-VERY DENSE RED BROWN SILTY TO SLIGHTLY SILTY FINE TO MEDIUM SAND gID.Q.

5 1/2',

168.9 1

1. 100 5"

g100 5 1/?

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158.9 g100 6'

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153.9 9 100 5 1/2 9100 5 1/2 148.9 9100 3"

9100 4"

143.9 O 1DD.

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DESCRIPTION 133.90 5

to 20 30 40 soso so 100 BACKFILL-VERY DENSE SILTY TO SLIGHTLY SILTY IFNE TO MEDIUM SAND

$100 5'

128.9 8S

,g CEMENT-PROBABLY LEAN FILL FOR LEVELING-LOW AREAS 88 MARL-SAMPLED AS VERY HARD GRAY

• 89.5 123.9 b

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• ELEV PENETRATION-BLOWS PER FOOT D(PT,H (FT)

DESCRIPTION 216.30 s

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206.3

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186.3 g 187 11 "

e 100 5"

l 181.3

$ 100 6 1/2 O 119 c,

h IST 6' I

'O 176 ~ ~'

9 100 REMARKS:

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o.1E O.,<<Eo s-27.2er.29-es JOB NUMBER 7429 3

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Soil Test Boring Record AI BLOM PER FOOT DEPgg (FT)

DESCRIPTION 176.30 5

'O 20 30 40 5060 80 100 BACKFILL-VERY DENSE RED BROWN SLIGHTLY SILTY TO SILTY FINE TO MEDIUM SAND G 100 4"

171.3 9 t as 11 "

9 100 4"

166.3 9 100 5"

4 17s 161.3 100 0 IST 6' e 193 9

156.3 e 100 IST 6 e too S

151.2 e 104*

IST 6' e n9 *.

IST 6' 146.2 e 112*

1ST 6' e 130*

IST 6

141.2 IST 5' O 11o*

,8 2

IST 6' 136.2 g

so 9 147*

REMARKS:

• BLOWS IN EXCESS OF 100 WERE DELIVERED FOR ADVANCING THE SPLIT-SPOON IST 6' SAMDLER THE FULL 6" OF THE FIRST SAMPLING INTERVAL IN ORDER TO OBTAIN SUFFICIENT RECOVERY TO PERMIT VISUAL INSPECTION OF THE SOIL

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-Testing-Company s-27 28 29-es Om -EO JOB NUMBER Soil Test Boring Record a^oe o'

ELEV PENETRATION-BLOWS PER FOOT PTg (FT)

OESCRIPTION 136.3 o s

to 20 30 40 sono 80 too O

BACKFILL-VERY DENSE LIGHT BROWN SILTY FINE TO MEDIUM SAND g 134*

1ST 6' 131.7 g g.

1ST 6' g 138*

1ST 6' g 178*

1x 7 91.0

-1ST 6' MARL-SAMPLED AS GRAY GREEN VERY l

93.0 SluTY FINE SANDY CLAY WTTH SEAMS *

$ 140 11 "

BORING TERMINATED C

8; I

REMARKS: *

• CEMENTED FINE SAND

• BLOWS IN EXCESS OF 100 WERE DELIVERED FOR ADVANCING THE SPLIT-SPOON SAMPLER THE FULL 6 " OF THE FIRST SAMPLING INTERVAL IN ORDER TO OBTAIN SUFFICIENT RECOVERY TO PERMIT VISUAL INSPECTION OF THE SOIL.

ser xcv swerT rea tXP. ANAT:CN OF SYMBOi$ ANO Afd EEWATiONS vgO Any,E

S' Law Engineering SRT-10e

,1sc ca _,1,s, BORING NUMBER

-Testing-Company-"r 83 + to 5-2*-es omwuEo E 92 + 70 7429 JOB NUMBER Soil Test Boring Record a^os or ELEV PENFTRATION BLOWS PER FOOT DEPTH (FT)

DESCRIPTION 211.8S 5

10 20 30 40 50 60 80 100 BACKFILL-VERY DENSE RED BROWN SILTY TO SLIGiTLY SILTY FINE TO MEDIUM SAND (h

8 206.8

\\

G 102 12" 201.8 GM12" 95 I s\\

196.8

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g 183 11" 9M12" 191.8 g 165 12" g 145 12" 186.8 9 lod.

I51/2'

.6 27.2 9g 5"

90 RING TERMINATED

• 181.8 l

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e REMARKS:

• BORING TERMINATED DUE TO PRESENCE OF MECHANICAL DUCTS.

BOREHOLE WAS GROUTED WITH 3 BAGS OF CEMENT AND 22.5 GALS OF WATER.

SEC KEY SHECT FCA thFgANATION OF SvMBOLS AND AboaE vlAT80*sh USED a60wk

d Law Engineering BORING COORDINATES BORING NUMBER SPT-106A Testing-Company N.

s-2+ 2s-as e3 + 2e.25 o.TE oe,<<Eo 7429 E: 92 + 82 JO8 NOMBER Soil Test Boring Record a^oE 2

3 or E<EV PENETRATION-BLOWS PER FOOT gPTH (FT) oESCRIPTION 210.7 0 to 20 30 40 5060 80 100 WASH BORING FROM 0 - 31.5 FEET 205.7 2

200.7 195.7 190.7 I 185.7 180.7 31.5 BACKFILL-VERY DENSE RED BROWN O

SLIGHTLY TO SILTY FINE TO 188 MEDIUM SAND 10h "-

175.7 g 100 l

5" l

8 g 100 h

4.5 "

I

^^ 0 17n.7 g 100 REMARKS:

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SEE MEY SMCET FCR [1P ANATich op SYMBOLS AND AebREviATeONS V5LO ABUv6 L

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5-"' 25-85 0- -

JOB NUMBER Soil Test Boring Record

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ELEV PENETRATION-BLOWS PER FOOT DESCRIPTION 9j{Tg (FT) 170.7 0 5

10 20 30 40 50 60 80 100 BACKFILL-VERY DENSE RED EROWN SIL'lY TO SLIGHTLY SILTY FINE TO MEDIUM SAND g100 3"

165.7 g 3 og 5 1/2

0 100 5"

160.7 g too s.g.., <

5" e 1oo 3"

155.7 g167 6"

O 100 4"

150.7 g

4" 9100 3"

145.7 9100 5"

1. 100 31/2" 140.7 9100 4"

G 3 00 3"

135.7 9150 6"

e 130 6"

g on n

!?^ '

gm REMARKS:

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80 RING NUMBER Test.ing Company s-2 2s-8s O 1E -mD JOB NUMBER,,

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ELEV PENETRATION-BLOWS PER FOOT gTg(FT)

DESCRIPTION 130.7 o s

to 20 30 40 soeo so too BACKFILL-VERY DENSE RED BROWN

• 81.0 MARL-SAMPLED AS VERY HARD GRAY f

GREEN VERY CLAYEY F-NE SANDY **

4 m g

BORING TERMINATED 125.7

.I.#g43 S

I REMARKS:

• TO SLIGHTLY SILTY FINE TO MEDIUM SAND

• • SILT OR VERY SILTY FINE SANDY CLAY SEE REv SHEET FOR EXPi ANATION OF SvMBOsS AreD ABbAE veAT60NS USED AbOvE

Law Engineering

'ma= c==r=TeS N: 76 + 70 BORING NUMBER SAT-107 TeSling~ Company E8^92 + 40 DATE ORILLED 5-21.22.23-85 JOB NUMBER Soil Test Boring Record

"^oe o'

ELEV PENETRATION-OLOWS PER FOOT gEPTH (FT)

DESCRIPTION 202.0 0 to 20 30 40 5060 80 100 BACKFILL - VERY DENSE RED BROWN E 56 SILTY TO SLIGHTLY SILTY FINE TO MEDIUM SAND (t.

w

\\

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e 114 192.0 g 103 g 144

/

187.0 34.g w

3 g

\\

\\

182.0 sg 173 gn O 187 11 "

177.0 lo" 9 138 172.0

$ 195 lo" e 100 5 1/2" 167.0 gg 4"

o O 100 6"

40 4 3 g,., n 9 170 REMARKS:

stt utv sstET FCA EAPi ANATION OF SYMBOLS AND A66AE V6ATIONS USED ABOvE

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Law Engineering 8==

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N: 76 + 70 eORING NUMSER SPT-107

$ $fhO Q ~ h 0 M Q $ O~~EF 92 + 40

~

5-21,22.23-85 DATE DRILLED JOB NUMBER 2

2 Soil Test Boring Record

'^ '

ELEV PENETRATION-BLOWS PER FOOT DEPTH (FT)

DESCRIPTION 162.0 0 5

to 20 30 do soso 80 100 BACKFILL-VERY DENSE SILTY TO SLIGHTL SILTY FINE TO MEDIUM SAND 9 100 4 1/2' 157.2 0 100 f

5" 9 100 5"

152.2

.o.a,.c.

5" 8 100 5"

147.2 4 loo 4"

e too 4"

142.2 g

3 1/2

O 100 31/2" 137.2 g

5 1/2" 9100 5"

132.2 g

5"

1. 100 5"

127.2 0 100 76.0 5 1/2 MARL-SAMPLED AS g AY GREEN VERY*

g h

BORING TERMINATED l o 1/2" g

125.P REMARKS:

• CLAYEY FINE SANDY SILT SEE *Ev $NEET FCit twPL ANAT:ON Or svusas5 Ar C AbeAf viAf eO% v5te atsovt

Law Engineering -. BOR8NG COORDINATES SPT-108 BORING NUMBER Testing COmpanf'

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83 + 10 DATE oRuED 6-12 f, 13-85 En 101 + 00 7429 JOB NUMBER Soil Test Boring Record PAGE OF ELEV PENETRATION-BLOWS PER FOOT DEPTH (FT) oESCRIPTION 220.5o 5

to 20 30 40 soso ao 100 0.0 TEMPORARY BACKFILL

• FIRM RED -

BROWN SLIGHTLY SILTY FINE TO 14 MEDIUM SAND g

'N 3.5 35 BACKFILL - DENSE TO VERY DENSE 215.5 RED BROWN SILTY TO SLIGHTLY SILTY "g

FINE TO MEDIUM SAND

(

\\4 7 9

N N

?,

210.5

\\

1 MP

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6 2 205.5

?

5

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200.S 91 n,

\\106 O

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195.5 j 72 3

\\ 123 0

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190.5 d

92 e

5

\\ 108 g

185.5 0: 53 11" e

9 163 11 1/2' M

g 40.0 180.5 9138 REMARKS:

• PLACED TO PROVIDE ACCESS TO BORING Stf Mtv $wtCT FOR E*P ANAT10N OF Svv0kS AND A6eAiviAh0N5 ustD abovE L

Law Engineering BORING NUMBER SPT-108

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o.1E oe,<<Eo e-12c13-85 JOB NUMeER 7429 a^uE 2

3 Soil Test Boring Record o,

E<EV PENETRATION-BLOWS PER FOOT DEPTH (FT)

DESCRIPTION

'^

1An.MO 5

10 20 30 40 50 60 80 1000 BACKFILL-VERY DENSE RED-BROWN SLIGHTLY SILTY FINE TO MEDIUM SANE 0 121 G 78 1

11 1/2' g lol 10 170.5 g l 79 11 "

0 173 165.5 g igo 11" 3100 S 1/2 "

160.5 9100 5"

e 100 6"

155.5 9100 V

9100 4 1/2" 150.5 e100 5 1/2" l

9100 4 1/2" 145.5 9100 4"

i 8

0100 l

5 1/2" g

so 9 100 REMARKS:

5" l

SEE REY SHEET ron EXP ANATiON OF SvuaOL5 AND A6eAEviAfiOhh USED AbowE 6

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S.1_10e BORING NUMBER

-Testing Company --

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om -uEo e-1 m s-es JOB NUMBER 7429 Soil Test Boring Record PAGE 9

OF 3

ELEV PENETRATION-BLOWS PER FOOT oEPg (FT)

DESCRIPTION 140.5 o s

10 20 30 40 5060 so 100e BACKFILL-VERY DENSE RED-BROWN SLIGHTLY SILTY FINE TO MEDIUM SAND M

4 135.5 N5 kl4" OO 59.3 MARL-SAMPLED AS VERY HARD GRAY 130.5 I

O 58 90.5 4REEN VERY SILTY FINE SANDY C pL BORING TERMINATED C

3*

I REMARKS:

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7429 JOS NUMBER Soil Test Boring Record PAGE OF ELEV PENETRATION-BLOWS POR FOOT ogTH (FT) oESCRIPTION 200.0 0 5

to 20 30 40 5060 80 100 BACKFILL DENSE TO VERY DENSE RED-BROWN SLIGHTLY SILTY TO SILTY FINE TO MEDIUM SAND 9

s 204.0 h

2 y

/

/

/

@5 9

\\

199.0

\\

d 99 a u.,,

1

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p 80 194.0 1

t,$

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189.0 m

,n i-1 I

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184.0

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179.0 g104 0154 174.0 0 174 11

g176 e

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40 169.0 a

3110 REMARKS:

SEC KEY $HEET FOA ExP ANATION OF SYMBOLS AND ABBRE vsATIONS USED ABOVE L

Law Engineering SPT-!09 sORING Pv0M8ER OSting-Company----

oATe oRiuEo 6-6.7t.8-e5 7029 JO9 NUMILER Soil Test Boring Record a^ot -

o-ELEV PENETRATION-BLOWS PER FOOT DEg (FT)

DESCRIPTION 169.00 5

10 20 30 40 soso ao 1009 BACKFILL-VEF.Y DENSE RED-BROWi4 SLIGHTLY SILTY TO SILTY FINE TO g

MEDIUM SAND 11 164.0 01EQ.

1 105

$184 11' '

159.0 5

0 100 154.0 OLDZ 10

g100 5"

149.0 g10,0 i

g g.100 IST 6 144.0 O

LQ9 1ST 5' 5

139.0 M

4 0100 I ST 4.'

1 134.0 9125 1ST 6'

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• 19.9.

3 J 5" h

65

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MARL-SAMPLED AS VERY HARD GRAY

• 129.n 80.0 E

BO2ING TERMINATED I

REMARKS: ' Green very clayey fine sandy silt.

1.2 Law Engineering BORING COORDINATES eORING NUMBER SAT-110

._ Testing. Company N,

e-ac4-es ei. As o.1..u.o En 100 + 80 JOB NUMBER 7429 Soil Test Boring Record eaos 2

3 Or DEPTH (FT)

DESCRIPTION 21 0

40 80 BACKFILL-DENSE TO VERY DENSE -

RED BROWN SLIGHTLY SILTY TO SILTY FINE TO MEDIUM SAND 9,32 N

214

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58 GD 200 5i w

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6-3-64-85 o*= -o JOB NUMBER Soil Test Borir.g Record ELEV PENETRATION-BLOWS PER FOOT DEPg (FT)

DESCRIPTION 179 0 5

10 20 30 40 50 60 80 100 BACKFILL-VERY DENSE RED BROWN SLIGHTLY SILTY TO SILTY FINE TO MEDIUM SAND 0 123 174 Q154 OM 11 169 g156

, p a g l46 164

- g159 9 129.

5

159 gg toS" e L@.

4" 154 gg 11 "

O 115.

1ST 6 "

149 g167 012.h.

1 ST 6 "

144 gg 4"

9 199.

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4

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R2 MARKS:

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6-'"- 8 5 om -

429 JO9 NUMBER Soll Test Boring Record o'

ELEV PENETRATION BLOWS PER FOOT DEgy (FT)

DESCRIPTION 130 0 5

to 20 3C 40 50 60 80 100e BACKFILL-VERY DENSE RED BROWN SLIGHTLY SILTY TO SILTY FINE TO MEDIUM SAND GM 4h"

.,9 4I00 89.0 4"

90.C MARL SAMPLED AS VERY HARD GRAY

• BORING TERMINATED AT 90.0 FEET 2"

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I REMARKS:

• GREEN VERY CLAYEY FINE SANDY OF VERY CLAYEY FINE SANDY SILT Stf af v SHEf ? FCR E WP. ANA?!CN CF $YMBOi$ AND A6 sat v

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%4V July 3, 1985 Walter R. Ferris 106 Paseo Way Greenbrae, CA 94904

Dear Mr. Ferris,

I have received fro: Zia Yazdani the result s of the standard penetration test progra: carried out at the site of the Vogtle Nuclear Project. Ten SPT borings were drilled at locations distributed across the site and all show very high penetratien resistance values in the compacted backfill.

My evaluation of the results indicates the following:

N-values range from about 30 to 97 with Top 10 ft. of fill

a conservative average value of about 50 N-values range from about 62 to 200 with Depth range 10 to 30 ft. : a conservative average value of about 100 N-values range from about 100 to 200 with Depth range 30 to 80 ft.

a conservative average value of 150.

I note that the SPT tests were carried out using a safety hammer and a rope and pulley technique, so that the procedure can be expected to deliver about 60% of the theoretical free-fall energy to the drill-stem (i.e. the Energy Ratio is about 60%).

Based on the above I interpret the resulta as follows:

Average Effective Overburden C

(N )60 1

Depth N

N value Ressure 60 5 ft.

50 650 psf 1.6 80 20 ft.

100 2650 psf 0.87 87 60 ft.

150 7800 psf 0.53 80 Thus the (N )60-values are reas nably consistent as would be,

y expected for a reasonably uniform fill.

The field performance of sites which have and have not liquefied during earthquakes with Magnitude 73, summarized on the 5

attached figure, shows clearly that there is no possibility of

7

,. o I

liquefaction occurring in this soil for any level of ground acceleration that may develop at the Vogtle site. In fact liquefaction is simply not a credible mode of failure for this fill.

Sincerely yours, 0L A

H. Bolton Seed e

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-(N 160

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RELATIONSHIP BETWEEN STRESS RATIO 5 CAUSING LIQUEFAC N -VALUES FOR CLEAN SANDS FOR M = 7-1/2 EARTHQUAKES y

gran w r ' c OBallelle Pacific Northwest Laboratories P.O. Box 999 July 16, 1985 Richland, Washington U.S.A. 99352 Telephone (509)

Telex 15-2874 Mr. Cliff R. Farrell Bechtel Civil and Minerals, Inc.

P.O. Box 3965 San Francisco, CA 94119

Subject:

Final Letter Report for Vogtle Nuclear Power Plant Sediment Sorption Tests - Contract No. 23112/07049 In mid-June 1985, four sediment samples (designated 13293, 13298, 13308 and 11755) and one well water sample from the Vogtle Nuclear Power Plant (Georgia) were received. The four sediment samples were air dried in our laboratory, then gently disaggregated and each sample was well mixed. The well water was filtered through 0.45 um membrane filters to remove suspended material. The pH and Eh of the filtered water were pH = 7.42 and Eh = 373 my vs SHE.

Triplicate one-gram samples of each of the four air dried sediments were placed in individual 50 ml polycarbonate centrifuge tubes. Nexb5 30.0 mis of the figred ground water that had been spiked with 15.6 pC1/1 Sr and 242 uCi/t Cs were contacted with the sediments for 7 days. The slurries were continually gently agitated on a linear shaker.

In addition, three blank centrifuge tubes were treated in a similar fashion excepting that they contained only the radionuclide traced well water. These samples were used to correct for any container adsorption.

After the 7-day contact period, the samples were centrifuged and the supernatant solution was filtered through 0.45 m membranes.

Exactly 15.0 mis of the filtered samples were radiocggnted on a Ge(Li) gector for the characteristic gamma-rays 514 key ( Sr) and 662 key (

Cs).

The distribution coefficient, Kd, for Sr and Cs was then calculated from the observed counts for the blank solutions and the supernatant solutions from the sediment samples using equation 1.

Ce V

Kd =

Eq. I w

where Co = counts / min in blank sample (average of three blanks)

Ce = counts / min in each supernatant solution V = volume of solution (30.0 mis)

W = weight of sediment (1.0g) 9

~

Mr. Cliff R. Farrell 4

July 16,1985 page 2 -

Table 1 is a summary of the radiocounting data and Table 2 is a summary of the individual Kd values. The variability in the observed replicates is similar to past experience for Sr and perhaps a little higher for the Cs values on sediments 13293 and 11755.

Perhaps the Georgia sediments contain a mineral very specific to cesium adsorption that is present in small amounts such that one gram samples are not truly homogeneous. That is, one sample such as Sample B for sediment 11755 might contain more of this selective mineral than the other two replicates.

In general, the trend for greater Cs adsorption than Sr adsorption is typical of sediments I've worked with and the absolute range Cs ( 400 to 2l00 mls/g) and Sr (40-95 mls/g) are typical of predominantly sand-sized sediments as the Georgia samples appear to be.

Sincerely yours, R. Jeff Serne Staff Scientist Geochemistry Section Earth Sciences Department RJS:dw I

Attach.

cc: Mr. Ken Abbot (Bechtel) l l

l l

e

Table 1 Counting Data Counts / min 137Cs SF Blank A 0

2 5.'

31538.6 2414.6 Ave.

33400.8 2542.4 Sediment 13293 A

2280.8 1146.8 1860.6 986.2 3759.0 1111.6 Sediment 13298 A

1060.2 588.4 B

793.6 598.0 931.6 652.2 Sediment 13308 A

1850.2 693.6 B

1715.6 779.2 1915.4 692.6 Sediment 11755 A

535.0 1192.0 B

352.6 734.6 564.0 841.2

r--

Table 2 Kd Data (unitsmis/g) 137 85 Cs Sr

. Sediment 13293 A

409 36.5 8

509 47.3 C

237 38.6 Ave.

T8T 138 Ave. T0'.T 6

Sediment 13298 A

915 99.6 B

1233 97.5 C

1046 86.9 Ave.

TOT!i t 160 Ave. T C T 6.8 Sediment 13308 A

512 80.0 B

554 67.9 C

493 80.1 Ave.

If6 31 Ave. 76 U 7.0 Sediment 11755 i

A 1843 34.0 B

2812 73.8 C

1748 60.7 Ave.

YTIT 589 Ave. 3577 20.3 i-l l

l l

t