ML20032E850
| ML20032E850 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay |
| Issue date: | 11/16/1981 |
| From: | Atterman I, Kimball J Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20032E834 | List: |
| References | |
| ISSUANCES-OLA, NUDOCS 8111230373 | |
| Download: ML20032E850 (7) | |
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UtilTED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSIllr. BOARD In the Matter of PACIFIC GAS AND ELECTRIC COMPANY
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Docket No. 50-133 OLA (Humboldt Bay Power Plant, Unit No. 3
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Amendment to Facility Operating License)
AFFIDAVIT OF INA B. ALTERMAN AND JEFFREY K. KIttBALL ON SEISMIC EFFECTS AT HUMBOLDT BAY I, Ina B. Alternan being duly sworn, state as follows:
1.
I am employed by the U.S. Nuclear Regulatory Coamission as a Geologist in the Geosciences Branch of the Division of Engineering, Office of Nuclear Reactor Regulation. A copy of gy professional qualifications are dttached and are true and correct to the best of rqy knowledge and belief.
I, Jeffrey Kimball, being duly sworn, state as follows: I am employed as a Seismologist / Geophysicist in the Geosciences Branch of the Division of Engineering, Office of Nuclear Reactor Regulation. A copy of my professional qualifications are attached and are true and correct to the best of my knowledge and belief.
2.
Question 4 in the Licensing Board's Memorandum and Order of October 20, 1981 stated:
Has there been any evidence whatsoever of seismic effects within the exclusion area? If so, please describe.
The Staff's reply to this question is provided below.
8111230373 811119 DR ADOCK 050003]
3.
Since the licensing of the Hunboldt Bay Nuclear Power Plant in 1962, two significant moderate seismic events have occurred in the site locality: one on June 7,1975, and the other on November 8,1980, after the plant had been shut down by the NRC pending resolution of some faulting problems. The first of these, in 1975, had its epicenter 35 km south of Eureka, with an f(=5.2, and caused significant dauage in the region.
There were no geological or surficial effects of the earthquake within the exclusion The only known effects nearby were in the King Salmon Trailer Park, a area.
half-mile west of tne plant, where blacktop cracks occurred, and on a roadday one mile south of the plant in Fields Landing, where similar cr;;ks were observed.
4.
After the 1980 earthquake, which had an epicenter at ic m 60 km west of the California Coast on the sea floor, ar.d an H =7, a team of 14RC staff engineers and a geologist visited the site to examine the effects of the earthquake on the plant, the site, and the region. A report on the effects of the earthquake on plant structures was issued on January 19, 1981 and later published in April 1981 as NUREG-0766 (" Effects of November 8, 1980 Earthquake on Hunboldt Bay Power Plant and Eureh Lalifornia Area").
Conclusions of this report were that the peak ground acceleration in the free-field at the plant may have been in the range of about 0.159 to 0.25g in the East-West direction. The report also concluded that the effects of the earthquake on Humboldt Bay Unit 3 were minimal and did not endanger tne health and safety of the public. The 1975 earthquake had crre energy associats' with the higher frequencies than did the 1980 earthquake.
In general the 1975 event was of shorter duration compared to the far-field longer duration nature of the 1980 earthquake, qualitatively indicating less damage potential.
5.
Accompanied by our consultant, Tim Haitt of the USGS, Ina Alterman toured the plant site and region.
No ruptures, or land slumps or sifdes of the ground surface were found within the exclusion area of the plant. No evidence of surface effects of any kint were seen in the exclusion area or on the marine terrace, on which the plant is built, just outside the exclusion area. The surface effects closest to the plant were seen in King Salmon, again in the trailer park. There, new blacktop was freshly cracked, one crack going through a concrete drainage box set into the roadway. This location is near the projected surface trace of the Bay Entrance fault.
While the cracks do not suggest motion along the fault, it is interesting to observe that, further away, a number of cracks in the blacktop that suggested liquefaction were seen near a seafood stand on a road in Fields Landing that is also along the trace of the Bay Entrance fault. This was the same location as the Fields Landing crack observed after the 1975 earthquake.
6.
An open-file report by the U.S. Geological Survey (Lajoie and Keefer)l/ reports that the asphalt at one of the abutments of the highway i
bridge near the entrance to the plant was broken by two fresh cracks, a few millimeters wide, which the authors attributed to slight displacement of the bridge during the earthquake.
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Lajoie, Kenneth and Keefer, David, " Investigations of the 8 November 1980 earthquake in Humboldt County, California," (1981), USGS Open File Report 81-397.
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The projected trace of the Buhne Point fault, discovered recently by PG&E consultants' Summary Report of October 1, 1980,2f comes close to this bridge, but the USGS reported that no evidence was observed to suggest fault rupture as the cause of the cracks.
7.
The severest effects of the event within the plant region were in Fields Landing, where an MM VII is interpreted.E Here houses were knocked off simple foundations, glass shattered, and soae chimneys fell or were partfaDv 'amaged. Besides a few fresh cracks in the roadtop previously mentioned and some fresh cracks in the sand quarry, no other geologic effects of the earthquake were observed. About 40 miles north of the plant, liquefaction-induced phenomena were observed on Big Lagoon Spit due east of the epicenter. These included sand boils, surface cracks, lateral spreads, and slumps at shoreline, in unconsolidated medium to coarse sand.
Descriptions of other localities with minor surface disturbance resulting from the 1980 earthquake may be found in the USGS open-file report.
_2f Woodward-Clyde Consultants, " Evaluation of the Potential for Resolving the Geclogic and Seismic Issues of the Humboldt Bay Power Plant Unit fio. 3, Summary Report and Appendices," (prepared for Pacific Gas and Electric Company, Oct.1,1980).
3]
Ruth B. Simon, " Intensity Survey for 8 fiovember 1980 Eureka, California earthquake," Seismological Society of America (Abstract),
SSA meeting, March 1981.
8.
PG&E's geological and seismological consultants, Woodviard-Clyde Consultants, Inc. submitted a report in October,1980, referred to heretofore, describing the results of their geologic and seismic studies of the plant site and region with special emphasis on the locations, regional relationships and ages of last movements of the faults,
- b. 3. hb-Ina B. Atterman yeff(fy
. Yl'1 Subscribed and sworn to before me this /&+^- day of November,1981 ff.'eu Dr '? )7 E ri n Notary Public j My conmission expires:li /_ /95;&
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INA B. ALTERMAN, PH.D.
GEOSCIENCES BRANCH DIVISION OF ENGINEERING U. S. NUCLEAR REGULATORY COMMISSION My name is Ina B. Alterman.t.nd I am presently employed as a Geologist.in the Geosciences Branch, Division of Engineering, Office of Nuclear Reactor Regulation, Washington, D.C. 20555.
PROFESSIONAL QUALIFICATIONS IhaheaB.S.inGeology(1963)whichwasawardedMagnaCumLaudefrom City College of New York, where I was also a member of. Phi Beta. Kappa. My Ph.D. in Structural Geology was awarded in 1972 by Columbia University where I held a Faculty Fellowship.
My professional experience began with Unihersity teaching and field and laboratory research.
I taught Introductory Geology, Historical Geology, and Optical Mineralogy in various colleges (City, Hunter,.Barnard and Columbia) as a part-time lecturer while in Graduate School. As a full time Assistant Professor at Lehman College, starting in 1971 I also taught Structimi Geology, Tectonics, and Igneous and Metamorphic Petrology until coming to NRC in October, 1979.
My major research actihities were grant-funded field mapping, structural analyses of nultiple deformation, mechanisms of ductile deformation, and ancient plate tectonics. Some of this mapping, in Pennsylvania, is now included on the latest official geologic map of Pennsylvania, published by the Pennsylvania Geological Survey. For two sumers in 1976 and 1977, I did a study of linear structures and brittle fracturing of the earth's crust for the National Aeronautics and Space Administration using Landsat and other remote sensing techniques.
Iamoftensentpapersonhariousaspectsofstructuralgeologytoeditand/or review for journals and proceedings volumes (for example, Journal of Geology, BasementTectonicsVol.). My own publication-include articles in the Earth Science Encyclopedia, Petrology Volun (still in press), articles on stratigraphy, mechanisms of slatycleavage formation, Paleozoic plate tectonics in the Appalachian Piedmont and late brittle faulting in the Appalachians.
At NRC I hahe been involhed in therchiew of recent geologic features near Rancho Seco, and at the Washington Nuclear Plant No. 2 on the_ Columbia River Basalt Plateau in Central Washington State.
I recently supervised the corWlation of information concerning the geologic and tectonic setting for every nuclear f acIIity in California, including university and industrial research reactors and power plants.
I am a member of the following professional and scientific organizations:
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Geological Society of America American Geophysical Union American Association for the Advancement of Science New York Academy of Science Potomac Geophysical Society Washington Geological Society Sigma XI Phi Beta Kappa
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JEFFREY K. KIMBALL GEOSCIENCES BRANCH, P-314
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DIVISION OF ENGINEERING.
U. S. NUCLEAR REAGULATORY COMMISSION WASHINGTON, D.C.
20555 Hy.name.is Jeffrey K. Kimball.
I am employed as a Seismologist / Geophysicist reviewer, Geosciences Branch, Division of. Engineering, Office of Nuclear Reactor Regulation.
I received a B.S. degree in Oceanography from the. University of Michigan
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in 1977 and a M.S. degree in Geology from the University of Michigan in 1979, with a specialty in seismology and geophysics.
I'bave been employed by NRC since May 1980 as a Seismologist / Geophysicist reviewer as applied to the evaluation of applications for construction and operation of nuclear facilities, and to determine the thoroughness-of this information for defining the seismic hazard for which facilities must-be designed. Since joining the Nuclear Regulatory Commission staff,'I have participated in the licensing activity for approximately ten sites.
From 1977 to 1980, I was a research assistant and teaching assistant at the University of Michigan. My activity as a research assistant included seismic data compilation studies for the U. S. Geological Survey and data analysis and operation of a nine station seismic network. My M.S. thesis work involved a study on surface wave dispersion of the Atlantic Ocean Basins and has been presented at national meetings of professional societies and published in a professiona'l journal. Teaching assistant experience consisted of helping teach both introductory and advanced geology field courses.in Wyoming for two summers and an introductory geology laboratory class at the University of Michigan.
I am a member of the American Geophysical Union and the Seismological Society of America, ana have co-authored 7 publications including abstracts of pre-l sentations to professional societies and EUREG documents.
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