ML20147D219

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Based on Evidence to Date,Fault 5 Is Not Capable W/In Meaning of 10CFR100.Due to Apparent Association of Fault 5 to Faults Previously Described,Staff Does Not Feel Site Visit Is Necessary
ML20147D219
Person / Time
Site: Phipps Bend Tennessee Valley Authority icon.png
Issue date: 12/12/1978
From: Stepp J
Office of Nuclear Reactor Regulation
To: Parr O
Office of Nuclear Reactor Regulation
References
NUDOCS 7812190183
Download: ML20147D219 (5)


Text

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/ DEC 12 is70 MEMORANDUM FOR: Olan D. Parr, Chuf Light Water Reactor: Branch #3, DPM FROM: J. Carl Stepp, Chief Geosciences Branch, DSE

SUBJECT:

FAULTING IN FUEL BUILDING EXCAVATION FOR PHIPPS BEND, UNIT 2, TAC # 4954 PLANT NAME: Phipps Bend Nuclear Power Plant, Units 1 & 2 LICENSING STAGE: CP DOCKET NUMBERS: 50-554 MILESTONE NUMBER: N/A RESPONSIBLE BRANCH: Sid Miner, LWR-3 On November 14, 1978 the Tennessee Valley Authority (TVA) informed Sandra Wastler that while excavating the foundation for the Phipps Bend, Unit 2 fuel building a reverse fault was discovered. In accordance with guidelines described in my August 14, 1976 memo to Olan Parr, TVA submitted the enclosed report providing a detailed description of the reverse fault and discussion of the fault's relationship to regional geology. As a result of the staff's review of this report, Fault #5 is considered to be associated with de--

formational activity related to the regions early geologic history, some time before 225 million years before present. Based on the evidence to date, this fault is not capable within the meaning of Appendix A to 10 CFR Part 100. Due to the apparent association of Fault #5 to the faults previously described, the staff does not feel a site visit is necessary.

Q joJ/dd-prJ.CarlStopp, Geosciences Branch Chief Division of Site Safety and Environmental Analysis

Enclosure:

As stated cc: R. Boyd S. Miner R. DeYoung S. oldberg D. Muller R R. Denise Local POR R. Jackson r-- ~~_.~.____ _

[i/filS DOCUi.fE!T CONTAINS 7812190133 ' UTY PAGES g

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