ML19322C079
| ML19322C079 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 03/16/1977 |
| From: | Neighbors D Office of Nuclear Reactor Regulation |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7912300067 | |
| Download: ML19322C079 (3) | |
Text
__
__OcEEd Nkh_ _ _ _ _ _ _ _
Sc>. g. 9
?
e
//
MAR 161977 MEMORAhuuM FOR:
A. Schwencer, Chief. Operating Reactors Branch fl. DOR FROM:
Don Neighbors, Project Manager, Operating Reactors Branch fl.
^
SUBJECT:
~
FORTHCOMING MEETING WITH DUKE POWER COMPANY (OCOMEE NUCLEAR STATION)
Date and Timet March 23,1977. Wednesday
,9:00.a.m.
Location:
lbcasse Dam Facilities i
1.ake Jocasse, South Carolina
Purpose:
To discuss the seismic activity in the vicinity of Jocasse Dam (Discussion items attached)
Participants:
NRC
,ar-u.
t..
D. Neighbors,
R. Jackson D,Simpson J. Kelleher DPC M.Tuckman, et al Consu ltants priginal stened by J. 'D. Neighbors, Project Manager Operating Reactors Branch #1 Division of Operating Reactors
Enclosure:
r ' -.,,,,. -,-,_
i Discussion iteras m,
d h4 R ~ ~ "
"')
" "I "* 2
'2
"*r C'
cc w/ enc 1:'
i See next page Gr7 tee:*-
r-t_-
e u m tion u n t i u - : ::.
1
. '.. n e,. _.
,ig,
- Sti:. for n11. - <
., s v a
.1-,
.;c; ex r
e
.P PIC E
- j DN dhtiors:lt 1 6777 k
nava*
Eroue si. <,.763 nacu o24.
-r u.m
. ri im
,e 1912sooo f7 g
(
i!
I
' i w
l DISCUSSION : 7E"5 FOR i
MEETING WITH DUKE PCTR COMPANY OCONEE/JOCASSEZ DAM i
l i
1.
Geology and Seismology Staff objectives f
2.
Specifics of Seismic Network Operation i
a.
Station locations
\\
b.
Network capability - nagnitude ar_d threshold, distanc e and depth capability Discussion of hypocentral activity since July 1976, c.
including focal plane solutions I
d.
Reporting procedures to NRC staff f
j 3.
Specific Information on Geologic Reconr.aissance of Site Area Location of discovered faulting a.
b.
Basis of fault age dating Available photos of dam abutments and foundation c.
d.
Subsurface geology - models 4.
Reservoir-Induced Seismicity Similarities - difference Jocassee to known damaging a.
5.
Seismic Adequacy of Dam Construction progress photos /airphotos i
a.
b.
Groundwater elevation before/af ter dam filling (time-head plots)
Embankment construction specifications (engineering properties c.
for design and basis, density, gradation for all zones, settlement and alignment of crests and slope as a function of time) f i
v 19'* '
MAR 161977
~
Seepage rates _(relief wells, weiss, drains) d.
Simple strain computations to assess approach to threshold of e.
cracking core I
^
f.
History of inspections and repairs to date I
Sensitivity of dam to surface fault movement (chickness and g.
location of filters, strain distribution - rough calculations)
Time - acceleration plot of expected earthquake (reference h.
.12g for 5.6 Mt earthquake - considerations, basis, justification) i 4
f E
h o
i 4
]
i i
f I
I i
4 i
4 i
q Mart 16(
F.
~ ~ - ~ - -, - - -.. -
.