ML18017B313

Seismic Monitoring Rept,Oct-Dec 1980.

ML18017B313
Person / Time
Site:	Harris
Issue date:	01/29/1981
From:	CAROLINA POWER & LIGHT CO.
To:
Shared Package
ML18017B312	List: ML18017B311 ML18017B313
References
NUDOCS 8102030383
Download: ML18017B313 (1)

Text

. QUARTERLY DATA REPORT SHNPP SEISMIC MONITORING PROGRAM OCTOBER 1 1980 DECEMBER 31 1980

- Carolina Power.' Light Company has completed another quarter of operation of i,ts seismic monitoring program at the Shearon Harris Nuclear Power Plant Site near New Hill, North Carolina. During this period a total of 63 cultural events were recorded with an.S-P of less than 5 seconds.

No local earthquakes were detected.

Of these 63 events, 54 were confirmed as being explosions,by the responsible companies or agencies. The remaining 9 events displayed the signature and arrival pattern of previously identified cultural events and all of them occurred during daylight hours. Only one of these events was,recorded on a weekend or holiday:

. GMT S-P Date at Sta.' at Sta. 4 Probable 'Source 10-11-80 Saturday 18:27:10.5 3.2 Highway Construction This event occurred approximately 27 kilometers northeast of the plant site in the vicinity of a four-lane highway that is currently under construction. Many construction blasts have been recorded from this area in the past that were later confirmed as being explosions by the responsible contractor.