ML20213D157

Discusses Visit to Recently Discovered Fault Near Plants. Consists of Shear Zone About 35 Ft Wide W/Alternating Layers of clay-like Matls & Breccia.Recommends That Geosciences Branch Thoroughly Evaluate New Fault

ML20213D157
Person / Time
Site:	Columbia, Washington Public Power Supply System
Issue date:	03/07/1980
From:	Lynch M Office of Nuclear Reactor Regulation
To:	Rolonda Jackson Office of Nuclear Reactor Regulation
References
CON-WNP-0294, CON-WNP-1172, CON-WNP-294 NUDOCS 8003250850
Download: ML20213D157 (5)

Text

-

h h (.h o

jg DISTRIBUTIO!1: -.,A ggp 7g hgcket-Files 2:-M UlR #4 File LRebenstein l

DLynch j

f4 Service p

HHoltz

!E40RAf4DUti FOR:

Robert E. Jackson, Chief Geosciences Branch, Division of Systems Safety TilRU:

L. S. Rubenstein, Acting Chief, Light Water Reactors, i

Branch llo. 4, Division of Project flanagement FRO *4:

fi. D. Lynch, Project fianager,. Light Water Reactors, Branch >No. 4, Division of Project ifanagement I

SUBJECT:

REPORT 0:1 VISIT TO FAULT !! EAR W:tP'1, 2 AND 4 As part of my recent visit to W'{P 1, 2 and 4 with the Caseload Forecast Panel, I visited the fault recently discovered outh of Finley, Washington.

I was accompanied by a UPPSS' geologist, the !#lP-2 licensing engineer and the Region V resident inspector at W!iP 1 and 4.

i i

The.7 ult is located adjacent to the road which runs south from Finley and 1

i is on the north-westward facing exposure of the structure identified as j

The Butte. The fault consists of a shear zone about 35 feet in width; this shear zone consists of alternating layers of clay-like materials and breccia. On the northern side of the exposure, there is a reverse thrust fault which breaks a layer of colluvitsn whose age has not been established but which may be as young as 10,000 years. Overlaying this reverse fault is a younger colluvium layer which WPPSS has estimated to be about 6,500 years. A sketch of the fault's location and the exposure is attached.

In discussing the program planned by HPPSS with their geologist I deter-mined that no further field investigations and/or explorations of other potential outcrops of this fault were planned nor is it the intent of WPPSS to further expose the present fault. WPPSS believes that it is not possible to establish a definitive age for the older colluvium; their judgment is that this material -is between 10,000 and 100,000 years and most probably abcut 40,000 years old. Further.WPPSS does not believe it is possible to establish the amount of most recent movement of this fault. Accordingly, the task assigned to WPPSS' consultant, Woodward-Clyde, is to reevaluate the adequacy of the present design basis earthquake (i.e., 0.259 with the Reg. Guide 1.60 spectrum) based on the infomation presently known.

It is my understanding that DOE has been. informed of this recent finding and gdologists uorking for DOE have visited the fault.

In this regard, I was shown a geologic map enconpassing the llanford iteservation which will be nuhlfehad ehnetly Thie rann i m4 4 en te-tu + + Men 4e,nn%ne #wl+ Ar + b_ce to the southeast along the Butue structure i l line with tre recently di s-

• "'Tovtred faul't.""ivrever""I"was informed"thst"there war"no gidans vi

.u===*

.. 8 0 012.; 0,,)%,g.,,y

.m >

Nec PORM 314 (9 70 NRCM 0240 ff u.* **weaansat aamm emm s ere e.

A

Robert E. Jackson ~

. WAR 7 1980 i

I recent movement on this fault mapped by DOE.

In discussing this fault with the WPPSS personnel, I found them to be extremely cooperative a'nd helpful.

It is their understanding that R. !!c!!ullen of GSB will visit the Finley fault exposure in the next few weeks. I requested that WPPSS provide some'

\\

protection for this fault exposure which is on privately held land. !!hile WPPSS has taken photographs of the exposure, the lighting was inadequate to properly present the pertinent features. Accordingly, I did not request copies.

I recommend that GSB assign sufficient resources to the evaluation of the impact of this recent discovery since any significant change in the design basis earthquake for Wi!P 1, 2 and 4 facilities could adversely affect the completion dates of these facilities. The latest estimate for the fuel load date for UllP 2 is July 1982. The tendering of the FSAR for W!!P 1 and 4 is presently scheduled for ffay 1930.

Original signed by:

M. D. Lynch, Project Manager Light Water Reactors. Branch No. 4 Division of Project rianagement

Enclosure:

As stated cc:

D. Ross H. Denton E. Case R. Mattson R. DeYoung D. Eisenhut H. Berkow/P.ussell S. Varga d

e

..DP,M;(@,,6,,

,, DP.0;,(UR.,$,,,

arric.*

UQl,ynchmec..

..LS.hb.9nJ.t.e.1 n..

. 3/......1.80..

. 31......./.80..

NaC FORM 318 (9 76) NRCM 0240 W u.s. eeve==ue=, eamnae orwies e e se - se e ese

gl xv

.: e

. V. l i._._

i=g=

MAR 7 1980 DISTRIBUTION:

Docket Files LWR #4 File

==r LRubenstein DLynch MService Ja~

HHoltz i==E MEMORANDUM'FOR:

Robert E. Jackson, Chief, Geosciences Branch, Division

.._.=1 of Systems Safety THRU:

L. S. Rubenstein, Acting Chief, Light Water Reactors,

~

-~

Branch No. 4, Division of Project Management

=,.

FROM:

M. D. Lynch, Project Ma6ager, Light Water Reactors, Branch No. 4, Division of Project Management

==.

SUBJECT:

REPORT ON VISIT TO FAULT NEAR WNP 1, 2 AND 4:

.E; As part of my recent visit to WhP 1, 2 and 4 with the Caseload Forecas't.

"~

Panel, I visited the fault recently discovered couth'of Finley, Washington.

I was accompanied by a WPPSS' geologist,. the WNP-2 licensing engineer and

g;;.

the Region V resident inspector at W3P 1 and 4.

2...

The fault is located adjacent to the road which runs routh from Finley and is on the north-westward facing exposure of the structure identified as The Butte. The fault consists of a shear zone about 35 feet in width; this shear zone consists of alternating layers of clay-like materials and breccia. On the northern side of the exposure, there is a reverse thrust'

+.. = -

fault which breaks a layer of colluvitsn whose age has not been established dEE:

but which may be as young as 10,000 years. Overlaying this reverse fault 35E=

is a younger colluvium layer which' WPPSS has estimated to be about 6,500 TL..

years. A sketch of the fault's location and the exposure is attached.

In discussing the program N inned by WPPSS with their geologist, I deter-

[.

mined that no further fielt investigations and/or explorations of other EE potential outcrops of this fault,were planned nor is it the intent of WPPSS ez to further expose the present fault. WPPSS. believes that it is not possible to establish a definitive age for the older colluvium; their judgment is

=

that this material is between 10,000 and 100,000 years and most probably 1

=.=.

about 40,000 years old. Further, WPPSS does not believe it is possible to

.= =~~

establish the amount of most recent movement of this fault. Accordingly, l

the task assigned to WPPSS' consultant, Woodward-Clyde, is to reevaluate the

• =

adequacy of the present design basis earthquake (i.e., 0.259 with the f""f" t

Reg. Guide 1.60 spectrum) based on the infomation presently known..

g It is nty understanding that DOE has been infomed of this recent finding '

i.===

and geologists working for DOE have visited the fault.

In this regard, I Z,

l was shown a geologic map encompassing the Hanford Reservation which will be z.=

l

?dl khd thrtll. TM: =p idiata th t there ia actir fait frth=

i=

,,,, M the southeast along the But 'e structure 1 1 line with tr e recently di s-

==

l coviifsd"fs5Tt""l1 5Wsi/sF','"I"#ss 'Tiif6iEEd"Elist"HisF6"sss".66"syfds6'66"6f~"

" " " " ~ " " ' " " "

==

.e...>

==

l

.... ~.. -............

l oaf r >

. 2 l m.c conw sis <,.7o uncu oz.e A.....-----==-

p"4"

= = _ = =. = " ' =;

=. -.

==

,.a.m:.

=g

.=.

= =.

. =

==

t

T:Vy n:'

h-

,z.,

~,

hPy 6#

M

(* /,

f::s......

Robert E. Jackson MAR 7 1980 ue

=55 recent movement'on this fault mapped by DOE. In discussing this fault with -

the WPPSS personnel. I found them to be extremely cooperative and helpful.

=

It is their understanding that R. McMullen of GSB will visit the Finley 9

fault exposure in the next few weeks. I requested that WPPSS provide some' 9

protection for this fault exposure which is on privately held land. While WPPSS has taken photographs of the exposure, the lighting was' inadequate to

~EE properly p. resent the pertinent features. Accordingly, I did not request.

copies.

l

' I recommend that GSB assign sufficient resources to the evaluatioiof the

. impact of this recent discovery since any significant change in the design basis earthquake for WNP 1, 2 and 4 facilities could adversely affect the completion-dates of these facilities. The latest estimate for the fuel load date for WNP 2 is July 1982. The tendering of. the FSAR for WNP 1 and 4 is presently scheduled for May 1980.

EE

' i Or16 nal signed by:

~

1 M. D. Lynch, Project Manager Light Water Reactors, Branch No. #

Division of Project Management

==

Enclosure:

R As stated cc:

D. Ross H. Denton

....=,

E. Case' R. Mattson R. DeYoung

==

0. Eisenhut H. Berkow/ Russell

.;

S. Varga

.:; =.

EE

=

==

=

s=1

==

=d

=um

. 0P,h.(WR,,$,,,,',,0%

.,,.a -

sunnanos >

M C.b,*.ge,C,,,,, hj,g,'

,,,@,i,,Q,,,,,,,,,,,,,,,,,,,,,,,,,,

,,,,,,,,,,,,,,, h,0...,,,?.!,, d,,,,,,/,@.

o Ars >

==

N:X PORM 318 (9 76) NRCH 0240 us**ve=""*a**""****'"*****

Z':

Z.

• 44'A g, i.

'f4 b

[

"?fls o

• Fig /g, f

A k n//

W au G< sype

"*4 /

}

%/um g,,y Rive n wa.Ha/r qY g

• • Wa - wang p,

a carze y fMl Ey ppp u,_.,_

y/

$%e//

A 8

C, q

I $

Aj'pve.h h/I rkof;az 8-s )(

/' ?

, + +

I C*

6

fgv3

,sh s-am,mp //)

e".

i A

I

\\

L

~ " swr

,g $ ~ g/ n a z %

% 7t' eau.y

9. m,,

._