ML16245A718
| ML16245A718 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 08/22/1979 |
| From: | Sobel P Office of Nuclear Reactor Regulation |
| To: | Rolonda Jackson Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML16245A460 | List: |
| References | |
| NUDOCS 7911010285 | |
| Download: ML16245A718 (7) | |
Text
UIE D S TAT ES,
_-IJGTON. 0. C. 2055f 1
EM0RANDUM FOR:
Robert E. Jackson, Chief Geosciences Branch, OSS THRU:
Leon Reiter, Leader -"
Geology and Seismology Section Geosciences Branch, OS$
Phyllis Sobel, Geophysicist Geology and Seismology Section Geosciences Branch, DSS
SUBJECT:
DR.
DAVID SIMPSON'S REVIEW OF LAKE JOCASSEE SEISMICITY iThe three unit Oconee Nuclear Power. Plant is located approximately 11 miles
.>nstream from the Lake.Jocassee Dam in northwestern South Carolina.
Beginning
.n 1976 the NRC.staff reviewed the potential impact of reservoir induced 3arthquake activity at Lake Jocassee on Jocassee Dam and the. Oconee plant.
Or. David Simoson.was asked to provide technical assistance to the NRC staff in their review.
Dr. Simpson's contract.(Order No. DR-77-1203) expired
- ebruary 28,. 1978.
The contract specified that he would write an original cmpreensive final report.. However, the re2port was not written and the RC staff has therefore not fi nishd their -aview.
I recommand.that Dr. Simoson's contra.ct be exte:nded until Fabruary 28,.19 E so that he can provide the final report.
ackoround The Jocassee hydro station in Oconee County, South Carolina was built by the Duke Power Company in the early 1970's.
The lake was filled in January 1975 and maximum head was first achieved on March 15, 1975.
The region had been one of low seismic activity.
The first reported earthquake in the area occurred on Aucust 12, 1973.
Cn October 18 and November 6 and 25, 1975, after the resarvoir filling, three tquakes re felt in the vicinity of the dam.
The Iarcest *vbt was a agnitude (ML) 3.2 earthquake on November 25, 1975.
The maximum estimated
.tensity of this, event was III-IV(MM).
In December, 1975 the Jccassee Hydro nsultng Board concluded that the larcest earthquake would have no detrimental ecton the dam.
However, the Board recommended that Duke Pcwer coordinate.
The investigations of the University of South Carolina, Georgia Tech, and Law Engi aring in evaluation the significance of these events and establishing a seismic monitoring program.
7911010
44 seismographs were deployed in the vicinity of Jocassee reservoir.
In an August 1976 report entitled. "The Jocassee Earthquakes," Pradeep Taiwani and other investigators at. the University of South Carolina reported on the first six months of seismic monitoring (November 1975 to ay 1976).
Over one thousand events were.recorded between November 8, 1975 and May 31, 1976. Fifteen felt events occurred between December 8, 1975 and June 2, 1976. The number of recorded events rarely exceeded-10 events per day.
The seismic activity at Lake Jocassee was associated with.the-mpoundment, of over 100 m of water behind Jocassee dam.
The initial activity was centered near the dam. and the epicentral volume increased with time while centering on the Take.
Several possible precursors 'to the larger earthquakes were noticed, including (1) ts/tp ratio anomalies, (2) changes in b-values and (3) a lull in a period of increased seismicity before the larger earthquake.
During their May 20, 1976 meeting, the Jocassee Hydro Consulting Board concluded, that the data did not sucest a hazard to the dam.
The Board concurred with the Duke decision to terminate the seismic network on June 30 and replace it.
with a permanent high sensitivity seismograph that is integrated into the South Carolina network.
initiation of RC Review
/
Beginning in 1976 the-NRC staff reviewed, the potential impact of reservoir ind..:ed earthquake activity at Lake Jocassee on Jocassee dam and the Onocee iuclear Power Plant located abouti.l miles downstream.
From March 1, 1977 throgb February 28, 1973,. Dr. David Simpson was under contract to the NRC o povide technical assistance to the.NRC staff.
Dr. Simpson is a recognized aut:ority and qualified expert in the very specialized field of research relating to r-servoir-induced seismicity.
He has wor7&videexperience in this area and his. expertise. would insure that the staff would review this situation in the best manner.
From June 1976 to December 1978 seismic monitoring continued and the level of seismic activity remained low.
The average number of events per day was about one or two and the maximum earthquake was magnitude (Mc) 2.6.
Before June 1976 the events occurred at depths of less than 2km; since Jun.e 1976.
the seismicity deepened but there was no. further growth in epicentral area.
Prad ep Talwani has succested that the large events (M > 2.0) occur after a sustained period of Take level increase.
a~
i
-:w-p S mi ity hle chitoring.seismic activity near Lake Jocassee, a series of earth cu.:kes was observed from Decamber 29, 1977 to February 27, 1978. near Lake Keowee (15 or 20 km south of Lake Jocassee and 2 to 4 km west of the Oconee plant). A portable seismic network was.installed in the area.
The seismic activity.was in the form of an earthquake swarm, with nearly 100 or more events per day between January 4 and 7,.1978.
The level of seismic activity was low (M !2.2).
Before the swarm began I
urteen possible Keowee events had een recorded by the Lake Jocassee network.
Also it appeared that the July 13, 1971 Seneca earthquake (maximum intensity.IV and 3.8 MILg) was located near the Keow.ee activity.
The Seneca earthquake occurred after the last period of rapid filling of Lake Keowee in April 1971.
This suggests that the area of the Keowee earthquake swarm has had a history of seismid activity. which was possibly associated with Lake Keowee. The seismicity was probably undetected due to lack of instrumentation in the epicentral area.
On January 19, 1979 a magnitude (mL) 2.8 earthquake occurred.in the same area a few weeks after the raising of the lake level by about 10 feet.
Recent Seismicity at Lake Jocassee Pradeep Talwani has continued the seismic monitoriog at Lake Jocassee with a three station network funded by the U. S. Geological Survey.
On August 25, 1979 a mag nitude 3.6 earthquake occurred within.the seismic network.
The preliminary location is shown on the enclosed map.. This event was felt in South' Carolina, North.
Carolina and Georcia.
There are no confirmed reports of damage.. The generators at the Jocassee hydro station were tripped.. The accelerometers at the Oconee plant were not trigered; I am currently investigating what their trigger level is. The morning after the event, portable seismometars were deployed to monitor for aftershock actv.
I will inform you of any additional earthquake activity in the area.
Extension of Or. Cavid Simpson's Contract The NRC contract with Dr. Simpson (enclosed) specified that upon completion of the inquiry and avaluation of the-data, Dr. Simpson would submit a final report to the NRC which would provide his findings, conclusions and recommendations concerning the potential hazard presented by the Jocassee Cam to the Oconcee Plant site.
ihe final report was not written and the NRC staff will not be able to complete their review without the report.
Since Dr. Simpson's Contract (Order. No.
DR-77-1203) expired February 28,
- 1978, we request that Or. Simpson's.contract be extended until February 23, 1980.so that he can provide. the final report.
Dr. Simpson's report would help us close out this review and also be helpful in analyzing reservoir induced. seismicity at other sites in the southeastern U. S.
Phis Sobel, Geophysicist 0-Ology and Seismology Section Scsciences Branch,. DSS J. Kniaht L. Reiter
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? APRS 8 LAT NG TO This~ ORE ORD ER NO.
U S. NUCLEAR REGULATORY COMM SSICN DR-77-1203 POINT OF ISSUE:
REQUISITION NO WASHINGTON, D, C. 20555 dPuCHASEc OROER PER YOUR 2/24/77 O DELIVERY ORDER UNDER'CONTRACTNO.
COST SYMSOL ALLOTMENT.
APPROPRIATION SYMSOL AND TITLE 20-193-01-03:..
317XO200. 207 BI1186 TO
.CONSIGNEE AN DESTi NATION s
s U.S. Nuclear Regulatory Commission E
Mr. David Simpson H
ATTN:
Mr. R. Jackson L.14 Mansfield Avenue Division of Site Safety and Nyack, NY 1090 0
EnvironmentaI Ana sySis T
Washington, D.C.: 205503 0
VIA Re P. 0. No. DR-77-1203 0 LVERY F.O.B.
TIME FOR DELIVERY GOV'T 3/L NO.
DISCOUNTTERMS Destina ion N
See Below N/A et..
Plaase furni h he followng on the terms spec ed on both sides of this sheet and on the attached sheets, if any, except that any such terms which might be inconsistent with -he terms of any existing Federal contract or agreement undr which this order is placed will not apply.
a AATICLES OR SERVICES QUAN.
UNIT UNIT PRICE A.OUNT The Contractor shall Iovide technical assistance to the U.S. Nuclear Regulatory Commission (NRC) in.
connection with Oconee Nuciear Power ?lant Post-L unanticipated review problem.
Specifica ly the Contractor shall aid the NRC by assisting in directing heiqufry into.the induced s icity in the vicinity of the Lake Jocassee am, and assist the staff. in evaluatihg. the data and reports relating tc this situation which the NRC ill provide.
Periodic meetfngs with NRC staff is anticipated.
Upon completion'of the effort described above, the Contractor shall subm it a final report to the NRC which will provide his findings, conclusions and recommendations concerning the potential hazard presented by the Jocassee Cam to the Oconee Plant Site.**
The period of perfornance for the work under this Order is March 1, 1977 through February 28, 1978.
Submit Inoics in DULICATE in ccordans.i 4h inhor'ains NOT 0
D 56 0 O on reverse a n d for ard to
-o-U. S. NUC LERi C GLLA TOY iC.
S OFFIiC F T-E C3NT'OLLE7R
1 n O0 usd toughout is entract, the 8
DISCOUKITS i
c ne:
- a any d ',cu t :anyejd, o a) the term stom ni n e s fth e Ueim e wil ce com pu ed from date of de liv ry of the suop "a h tr Comm;szsion~ -aaess the United States ri ',4'in -. -:
-i~ 2rwr \\vn'n r G 1 Z ve.'aO S icc are1.t of o Nuclear Regulatory Commission or any duly authorized repre-dae Of dlivery at C;enation or :aO t
of i-arkazior, or;-an dairom sertative th'ereof.. including the.Contracting Officer exct
'or the ery nd acapance are at eioer ort o
orwn
-:rv purpose of deciding an appeal under the clause'entitled "Disputes."
ryand accirevoace or: vocr is received i :he office s rcifio ty *e (b). The errm "Contracting Officer" mteans the person exea se r c e iocer das reeie t11 he o te pec oy cuting this Contract on behalf of the Government, and includes his cPermenif eeme:
te mdae,!s te phrnote aardei o sucesors r ay-duy athorzedepreenttive ofany uchper-.Pament.deme
- e bnadafor.*":C p,..rpose dezarning *h ie so rs ox any ultauzhrized
.-apreses ta iyes of any such per-
.count, on the date of mailing of the Government check.
son.
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- 9.
INSPECTION. -
Except as may be otherwise provided in
- 2. VENDOR'S 3ILLINGISUTOS edrti this contract, final inspectionadacpac ilt ndea
-voices shall contain-the-following information:- Contract oCpru-n i
otrn and acceptance-will bF nco o e a es
:__t n Su Ples rejected at de-staio z o: ~ no-fom.c v
posal number (if any), order number, and item number, descrip-specifications shall be ratved by the Con tractor at "is xpewise tion of supplies or services, sizes, quantities, unit prices, and ex-7 protyf aftr notice of rahec e
aos Jended totals Bill-oLading.numoet and.--ightof shipment Nill
- om.
a o
rejection.
be shown. for shipments made on Government bills Of lading. At
- 1.
CONTRACT WORK HOURS STANDARCS ACT9 prepaid parcel-postOcarghs are biled the grosi'weigbtand shliping o i TIME CCMPENSATIONA -
This contract, CSo t T-n v :ats point must be shown on the in.oice.
1 1.. of a character specified in.th.Cont.act Work Hours SCand3rds
- 3. COVENANT AGAiNSTCONT(NGEv~ F2BS,@.he Con-Act-Overtime Compensation f40 U.S.C.. 32730) and s not t3ac.or warrNats tra n personorseingE..T ncES" benem covered by the WNalsh-Healey Public Conracts Act i41-U.S.C.
actor warrants that no person ac selling agncyhas been e 35-45), is subject to the fallowing provisions and.to at ater prc pmayed or retained to solicitor scure 'his s otract up roagree visions and exceptions of said Contract Work 'Hours Sandards mnt or LndsrstA sding for a c.isonperc-entage, brokerage...... %
Act t nt fee xc-gtirt s
ac a
aoh-neoioyn s or-om ao ay ltractor-or satco:trcanting for 'R art orshe cuercaf or selling gun'as ornainehd by h iontractor of the con:ract work shall require or pernit ay.
b r or reS or the ourpose o euring bushals vor bheac' or violaion of anic to be moloyed on such work in ext'ss or eigrtt hours in any ttlis-vWarranty-he i-overnmnrt sinall-have'-e -ri-ht7ib-anhuI' this-c,,,.,,
caiendar :-y orhf in exes ofo 6
in a'sy wioK-wekuLnlss contract without ability, or in its discretion to deduct from the c
ayorar 4 nxc rcorty compensation a, a rwe Unles contract~~~~ prc orcnnaino tews ecvr h ii sucr[aoe agehngeavscmestoa e nIo( les tract price or cor'ssdrwnion, or otrwise reover tho n ultng tnan one and one-half times his easic raze of pay for ail hours of such cOrnn*sson.parcata-'
brke age, oregeadorked-in excess-of-eight houjrs in any calendar day of-n -xce O.I -
of forty hours in such workweek, -;hiche'Ver is tne greater number of vertime hour$.
-:74 m er of or d;Il-a (b)
.' :he event of any 9iC!3tiqrn of Ze Provisions Of 7ara
-ate to Congress or rasident co-.-:ssioner shall beadmitted to any b
nt'of ano at of t crovs os a
sh:re or part of :Mis contract or to any benefit that ma at threfrom but.this provision hsali not be conszrued to exzend tosall be.'abie o any
-d eve or h'
'soi %Lrz.:1 aldiuo,s uch Contractor or succonr acor S 3r this contract if ri-de vith a cororation for its general bene i ad..
In aiio n, a Caror o
s o rci-
-a d
a. to a Unt:zd 5:aies fort liq-didated dam ages. *Slch wId
- 5.
EQUAL CPORTUNITY: IN EMPLOYMENT, er..o l y c corm ti itho sa' t foenviduo fal aborer Equal Opportunity clause in FR 1-112,803-2 is incoro-ora ted e'
5 or ae
- molayed in violaion-of t
ovisons of:
aaah inoroatdhe(T' in sum iof S0 ;or 'each calendar ay ont -'-'-
ch am.
in by reference and ;s applicable unles this contract is exempt
(
eu d
or ar ch cal wor n
or su rs under the rules and regulations of the Secretary of Labor issued -y wseq-or prm in a
- vior, n, nou o ight h ours pursuant~~~ to Excuiv :re.z.126oSpebr2,18 or in exces. of. forty hours in a orkweek w ithiout paymrent of the pur'uant to Exicutive Order
. f. 1 1246 of September 24-,
orq.
- 19.
erm ag (0 F.R. 12319, Srpt. 23, 1965).--
.,rqrc ermewgs.
21(cI The Contracting O ficer may withholo, qrcause to be
- 8.
CONVICT LABOR.
-- In connection with the-performC i
travithd, from an, ondneys payaoleon acoiuct of work per ance of work under :his contract, the Contractor a'grees nqt t or0ned cy-he Contractor or sucntractor, t'e full amount of mploy any person undergoing entence of imprisonment at hard
'wages required by his contractr and such sums as may adminis.
eor.
a trat'.-lv b determined to oe necessary to satisfy any liacilities of I
,j.such,Cb-actor or u.:oconzractor fo r qu'dae d da-acis as pro
- 7.
BUY AMERICAN ACT. -
(a) in aCuiring end products,,.Z in paragra.h (b).
zhe Buy Amnerican Act 411 U.S. Code 10 a-dl provides that the d)
The Cor,_cwr shall inserr par-graphs (a) 'hr-";
d) qovernnment 9g'Ye praferznce. to dJomestic source end proclucts:or of ti-.use in at LrCC su-1-abts af,3d ihali.,equ'--i. i stlus-iOn tt ur pose os ",;s cavuse:
I afl s.ioc,nt'actsaf zi-y tier.,-
(i)
"components" mea:ns tnose ar.dsmaeri,.nds Il cmc-'
-astose rtc es material, and-sup Ia)
Th Contractor shail mnaintain z;ayosa rs
- nan p 'is, which are dire,:!y ncrpoated in the and Product 3 '.
ne an acor sea a
n 29 a Sco contain (ii)
"end producfs' means those artices, materials, and sup-
-aig the rsmanfo spcifie a 29 CFr i 3
.o n i..
ecorc
- 'es, which are to be acquired under tiis contract for puolic tract at, and (iii) a "donest: source end oroduct" means (A) an unmianu-
- 11.
- TE05RAL, STATE, ANO. LOCAL TAXES. -
ceot 2s red end product,.hich has been mined or produced inthe.
may be otherwise piovidid.in thus contrac:7The on act price nited States End i2 an end product manufacted in the United includes al.acoiicabLe.
ederal taxes in effect on '.- date of this S ates if the cost of ;ne components thereof which are mined, pro.
contract but does not include any S:ate or local tales. use, or other duced, orn-anfacts d in the United States exceeds :0 percent of
- ax directly aoplicabie to,he comp-etac ipps or. ervices mcst of all its corntent nor the purposes of tis la) (iii) (a).
covered by this contract nor any cher 'ax
- .n <:Micn the Con..
o:onents ot f'---, origin of same tpe or kind As he prod-tractor or !nis ransactron is exempt. Upon s of e Con on ferred to i ol iiLor iii) of hij 'a se shall. ae.:rtated as Gacor :
Governme :
a urn sn a x
- on rtiicate o
ntes s
- uced o ',.acrur n ne-Unized or smiar vidence at
-'sm'tion w'i:h res,-c:
such
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Zht; -, eli co no nu hp c re a
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.ur ose 01 is clause hearm c'3" o:..........ans
- .his c,,rc
- ) sty so,~c urce and pron7ucts, except -no Zh atea of'-e cr orsu or, uo,,-i'n, the produc s:
cate cf -hit purcsn:s::
- r'con (i) h ch r -use outs de tie United S'ates' iL -i ic - '-
. rnm ent det-rr-' ines re not ned, o
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ONTI.'NUAl iON SHEET DR-77-123 2
David Simpson suj?
I s / Sa ;VIC. S CUIAN71rY UNr i ~
T 11:_'
The Contractor shall be paid the fixed rate of
$200.00 per day. It is anticipated that 24 man-days of effort over the period of performance will be required.
Travel costs associated with the above effort shall be reimbunsed in accordance with Federal Travel Regulations.
Miscellaneous costs which include printing, drafting, etc. shall be reimbursed at actual cos.
In addition to the provisions outlined on the reverse of this Order, the Contractor is also subject to those provisions as applicable, outlined in Attachmnent 1, hereof.