ML18018A481

Forwards Rept on Proposed Neuse Fault. Study Concludes No Evidence Presented That Proves Either Existance of Proposed Neuse Fault or That Fault Has Moved in Last 32,000 Yrs

ML18018A481
Person / Time
Site:	Harris
Issue date:	03/31/1983
From:	Zimmerman S CAROLINA POWER & LIGHT CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML18018A482	List: ML18018A481 ML18018A483
References
NUDOCS 8304040244
Download: ML18018A481 (6)

Text

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CXQE, Carolina Power 8 Light Company MAR 31 1983 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, D.C.

20555 SHEARON HARRIS NUCLEAR POWER PLANT UNIT NOS ~

1 AND 2 DOCKET NOS. 50-400 AND 50-401 NEUSE FAULT STUDY

Dear Mr. Denton:

Please find attached a report on the results of a study conducted by our geological consultant, Ebasco

Services, Inc., concerning the validity of a proposed "Neuse Fault".

This study involved a thorough review of the geologic literature of the Coastal Plain of North Carolina associated with the proposed fault.

In addition, the following experts on North Carolina Coastal Plain geology were interviewed:

Phillip Brown, Section Chief of the North Carolina Geological Survey, Walter H. Wheeler, Professor at the University of North Carolina at Chapel Hill, and Garry D. Jones, Union Oil Company.

The findings of this study are summarized below and discussed in more detail in the attached report.

The references cited below are listed at the end of the report.

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The change in depth to basement between Havelock and Morehead City, NC as reported by Ferenczi (1959) has been shown by additional well data (Brown and others, 1972) to be neither coincident nor associated with the "Neuse Fault".

Ferenczi (1959) thought that the Castle Hayne Formation was not deposited north of the Neuse River because the "Neuse Fault" provided a structural boundary limiting the basin of deposition.

Brown and others (1972) and Otte (1981) have since reported the presence of the Castle Hayne north of this boundary.

Silicified zones are not restricted to the alignment of the "Neuse Fault" and are actually the result of diagenetic alteration of silicious sponges (Otte, 1981).

Not only are Eocene ages and stratigraphy disputed by stratigraphic

experts, but faulting is not required to explain the depositional environment or present spatial distribution of Eocene units (Ward and others, in press).

8304040244 83033i PDR ADOCK 05000400, A

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Structural contours of the basement and the top of Cretaceous units (Brown and others, 1972) do not show any evidence of movement along the "Neuse Fault".

The original slopes of terraces have not been shown to have been initially horizontal, therefore, the present slope can not be automatically attributed to tectonic activity along the "Neuse Fault".

The region of the "Neuse Fault" is aseismic (Carolina Power

& Light Company (CP&L),

SHNPP FSAR).

The conclusion reached from this study is that there has been no evidence presented that proves either the existence of the proposed "Neuse Fault" or that it has moved in the last 32,000 years.

The proponents of the "Neuse Fault" have not presented any direct evidence of faulting and all the indirect evidence has either been disproved by other Coastal Plain experts or explained by other non-faulting hypotheses.

Therefore, it is our position that the fault does not exist.

Also enclosed are copies of the references requested by Mr. Tom Cardone at the meeting between CP&L and the NRC staff in Bethesda, Maryland on February 28, 1983.

Please note that the photocopy of the section of a map attached to the paper of Harris and others (1979b) is from Brown and others (1972).

When these two maps are compared, it becomes apparent that one of the 1000-contour lines for Unit F was mislabeled on the map published by Harris and others (1979b).

If further information or clarification on this subject is needed, please let me know.

Yours, very truly, S.

Zimmerman Manager Licensing

& Permits CKR/kjr (6456CKR)

Attachments Cco Mr. N. Prasad Kadambi (NRC)

Mr. G. F. Maxwell (NRC-SHNPP)

Mr. J.

P. O'Reilly (NRC-RII)

Mr. Travis Payne (KUDZU)

Mr. Daniel F. Read (CHANGE/ELP)

Chapel Hill Public Library Wake County Public Library Mr. Wells Eddleman Dr. Phyllis Lotchin Ms. Patricia T. Newman Mr. John D. Runkle Dr. Richard D. Wilson Mr. G. 0. Bright (ASLB)

Dr. J.

H. Carpenter (ASLB)

Mr. J.

L. Kelley (ASLB)

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