ML19329A533
| ML19329A533 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 02/02/1978 |
| From: | Neighbors D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8001060048 | |
| Download: ML19329A533 (2) | |
Text
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FEBRUARY 2 1970 i
HOORAtiDUM FOR:
Files (Dock fos 50-270 and 50-287) l FROM:
Dc,n Heighbors. *roject Manager, Operating Reactors Branch #1 i
SUBJECT:
RECL acI5MIC ACTIVITY IN THE OCONEE MJCLEAR STATION VICINITY On January 3,1978, Duke Power Company (DPC) informed HRC that seismic events had occurred in the Oconee - Jocassee Dam vinicity on three separate days which exceed a na9nitude of 2.0, which is the threshhold of reporting established by our letter dated May 20, 1977. A "no.
of events" threshhold of 100 per week was also established by that letter.
i On the morning of January 6.1978. DPC provided additional data which I
is shown below:
I Date Nis:6er of Events
_ Magnitude of largest event Decauber 29,1977 2
very low December 30, 1977 1
1.5 Decesber 31, 1977 28 2.2
[
January 1,1978 16 2.0 January 2, 1978 160 1.8 January 3,1978 180 2.2 i
January 4, 1978 109 1.7 l
- Jenuary 5, 1978 94 1.7
- January 6, 1978 209 2.0
- January 7,1978 15 2.0 i
- January 8, 1978
/4 t t
l
- January 9.1978 9
0.1 The seismic activity reported above was recorded on portable micro-earthquake recorders which were moved to the general area of the activity
.l after being picked up on the Jocassee Da:s seismic network. The area in which the activity is occurring is near the Stamp Creek Church about 3-5 miles west of the Oconee Nuclear Station and about 7 miles south of Jocassee Das, In addition to the events reported above, DPC stated that seieral events were felt in the area about 10:30 an on January 6,1978, but no further data was available. No events were felt at the Oconee Nuclear Station, k
- Provided on afternoon of January 6,1978 0
= Provided on January 10. 1973 6 ***Prav.1M aa Jarnaary 11,1978 k
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NRC FORM 318 (M6) NRCM 0240
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i The activity in the, Stamp Creek Church area does not appear to be related to the Jocassee Laka or Dam.
DPC will provide a followup letter in aboat a week to 10 days sutrasrizing these seismic events and prpviding an evals tion of the data.
t Original signed by Don Neighbors, Project Manager Operating Reactors Branch #1 Division of Operating Reactors cc: Local PDR NRC PDR j
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