ML18018B868

Quarterly Data Rept,Shearon Harris Nuclear Power Plant Seismic Monitoring Program,Oct-Dec 1984. W/850128 Ltr

ML18018B868
Person / Time
Site:	Harris
Issue date:	12/31/1984
From:	Zimmerman S CAROLINA POWER & LIGHT CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
NLS-85-020, NLS-85-20, NUDOCS 8502010473
Download: ML18018B868 (5)

Text

REGULAT Y INFORMATION DISTRIBUTIO YSTEM (RIDS)

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@ME Carolina Power 8 Light Company NLS-85-020 SERIAL:

JAN R8 >985 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, DC 20555 SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 DOCKET NO. 50-400 SEISMIC MONITORING PROGRAM

Dear Mr. Denton:

Carolina Power 6 Light Company hereby submits the Shearon Harris Nuclear Power Plant (SHNPP) Seismic Report for the fourth quarter of 1984. This report includes the data collected between October 1, 1984 and December 31, 1984 by the seismic monitoring network installed at the SHNPP site.

Should you have any questions regarding this report, please contact Ms. Carol Love of our Nuclear Licensing Unit staff at (919) 836-81 66.

Yours very truly, S. . Zi erman er Nuclear Licensing Section CGL/crs (1071CGL)

Enclosure cc: Mr. B. C. Buckley (NRC) Mr. Wells Eddleman Mr. G. F. Maxwell (NRC-SHNPP) Mr. John D. Runkle Mr. J. P. O'Reilly (NRC-RII) Dr. Richard D. Wilson Mr. Travis Payne (KUCZU) Mr. G. 0. Bright (ASLB)

Mr. Daniel F. Read (CHANGE/EPL) Dr. J. H. Carpenter (ASLB)

Chapel Hill Public Library Mr. J. L. Kelley (ASLB)

Wake County Public Library I

pot 411 Fayetteville Street o P. 0, Box 1551 o Raleigh, N. C. 27602

QUARTERLY DATA REPORT SHNPP SEISMIC MONITORING PROGRAM OCTOBER 1, 1984 - DECEMBER 31, 1984 Carolina Power 6 Light Company has completed another quarter of operation of its seismic monitoring program at the Shearon Harris Nuclear Power Plant site near New Hill, North Carolina. During this period a total of 1 45 cultural events were recorded with a S-P of less than 5 seconds. No local earthquakes were detected.

Of these 1 45 events, 123 were confirmed as being explosions by the responsible companies or agencies. The remaining 22 events displayed the signature and arrival pattern of previously identified cultural events and all of them occurred during the daylight hours. Only one of these events was recorded on a weekend or holiday:

GMT S-P Date ~Da at Sta. 4 at Sta. 4 Probable Source 11-1 7-84 Saturday 16'-55:04: 6 2. 7 Airport Runway Construction The signature and arrival pattern of this event are identical to 15 other events recorded during this quarter that were confirmed as being explosions from the construction activity for the new runway at the Raleigh-Durham airport, approximately 25 kilometers northeast of the Shearon Harris plant site. Of these 15 confirmed explosions, 1 also occurred on a Saturday.

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