ML20032E541
| ML20032E541 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 11/16/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Finfrock I JERSEY CENTRAL POWER & LIGHT CO. |
| References | |
| TASK-02-02.A, TASK-2-2.A, TASK-RR LSO5-81-11-003, LSO5-81-11-3, NUDOCS 8111200667 | |
| Download: ML20032E541 (6) | |
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November 16, 1981 Docket No. 50-219 A
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Mr. I. R. Finfrock. Jr.
- g # j Vice President - Jersey Central 7,
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N Power & Light Company
['.d Oyster Creek Huclear Generating Station p
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Post Office Box 388 Forked River, New dersey 08731
Dearfir. Finfrock:
SUBJECT:
OYSTER CREEK - SEP TOPIC II-2.A. SEVERE WEATHER PHENOMENA.
REVISION 1 0F STAFF REVIEW The SEP review of Topic Il-2.A, Severe Weather Phenomena for Oyster Creek, was issued on December 17, 1980, it transmitted a Texas Tech. University probabilistic analysis of wind and tornado loading for Oyster Creek to the licensee for their review, and stated the design basis tornado should be based on Regulatory Guide 1.76.
Since then, a reevaluation of the tornado wind speeds and associated pressure drops for the Oyster Creek site has been performed. As a result of the Texas Tech. University report, a core realistic design basis tornado and wind speeds for the Oyster Creek site have been established, and are defined in Enclosure 1.
The staff will evaluate the capability of the Oyster Creek structures, systems and corpomnts to withstand the severe weather loadings specified in Enclosure 1.
These include extrene tenperature, lightning strikes, snow and ice loads and wind and tornado loadings. Where it is determined that the structures, systems and corpenents cannot standup to these load-ings, the probability of occurrence for the loading will be considered in the final evaluation. Please factor this information into your site hazards evaluation in particular SEP Topic III-2, Wind and Tornado Loadings.
Sincerely, Sf S
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1)S u d ( f b Dennis 71. Crutchfield, Chief Operating Reactors Branch No. 5 gp Division of Licensing g//
Enclosure:
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Mr. I. R. Finfrock, J r.
cc G. F. Trowbridge, Esquire Gene Fisher' Shaw, Pittman, Potts and Trowbridge Bureau Chief 1800 M Street, N. W.
Bu eau of Radiation Protection Washington, D. C.
20036 380 Scotts Road Trenton, New Jersey 08628 J. B. Lieberman, Esquire Berlack, Israels & Lieberman Commissioner 26 Broadway New Jersey Department of Energy New York, New York 10004 101 Commerce Street Newark, New Jersey 07102 Natural Resources Defense Council 91715th Street, N. W.
Licensing Supervisor Washington, D. C.
20006 Oyster Creek Nuclear Generating Station J. Knubel P. O. Box 388 BWR Licensing Manager Forked River, New Jersey 08731 GPU Nuclear 100 Interplace Parkway Resident Inspector Parsippany, New Jersey 070$4 c/o U. S. NRC
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P. O. Box 445 Deputy Attorney General Forked River, New Jersey 08731 State of New Jersey Department of Law and Public Safety 36 West Sto;e Street - CN 112 Trenton, New Jersey 08625 Ocaan County Library Brick Township Branch 401 Chambers Bridge Road Brick Town', New Jersey 08723 Mayor Lacey Township 818 Lacey Road Forked River, New Jersey 08731 Commissioner Department of Public Utilities State of New Jersey 101 Commerce Street hewark, New Jersey 07102 U. S. Environmental Protection Agency Region II Office ATTN:
Regional Radiation Representative 26 Federal Plaza New York, New York 10007 g8 g
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ENCLOSURE 1 Systematic Evaluation Program Meteorology Oyster Creek Nuclear Generating Station TOPIC:
II-2.A, REVISION 1 TO SEVERE WEATHER PHENOMENA Extreme meteorological conditions and severe weather phenomena in the Oyster Creek site region were examined to determine if safety-related structures, systems and components are designed to function under all severe weather conditions.
Discussed below are the severe weather phenomena which could adversely affect the Oyster Creek site and which should be examined relative to the current design.
Normal daily temperature range from a minimum of 25 degrees Fahrenheit in January to a maximum of 82 degrees Fahrenheit in July. Measured extreme temperatures for the site region are 103 degrees Fahrenheit which occurred
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in July 1957 and -16 degrees Fahrenheit which occurred in January 1957.
The extreme maximum and minimum temperatures appropriate at the Oyster Creek site for general plant design (i.e., HVAC systems) are 92 degrees Fahrenheit (equalled or exceeded 1% of the time) and 7 degrees Fahrenheit (equalled or exceeded 99% of the time).
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Thunderstorms occur an average of 20 days per year in the site region.
Based on the annual number of thunderstorm days, the calculated annual flash density of ground lightning strikes is three flashes per square kilo-meter.
A structure with the approximate dimensions of the Oyster Creek reactor building can be expected to be subjected, on the average, to one strike every 13 years.
Based on Reference 1 the design wind speed (defined as the " fastest-mile" wind speed at a height of 10 meters above ground level with a return period of 100 years) acceptable for the site region is 80 miles per hour.
On the average, hail storms occur about one day annually, and freezing rain occurs approximately four days per year.
The maximum radial thickness of ice expected in the site region is about 0.75 inch.
Mean annual snowfall in the site region is approximately 22 inches, with a n'ormal winter precipitation snow load on a flat surface of about 20 pounds per square foot.
The maximum monthly snowfall occurred in February 1967 and totaled 35.2 inches.
The maximum snowfall from a single storm totaled 26.7 inches in December 1947.
The maximum measured snow depth on the ground for the site region is 30 inches.
Based on the 100-year recurrence accumulated ground snowpack and probable maximum winter precipitation for the site region, results in an extreme winter precipitation snow load on a flat surface of about 75 pounds per square foot.
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_2-The Oyster Creek tornado wind speed of 250 mph is based on review of the study by }. Mcdonald.
This value is chosen as the upper 95 percentile for the.
10- probability tornado.
The use of this value allows for uncertainty in the parameters factored into the analysis.
The pressure change and rate of-change are 1.75 psi and.7 psi /sec. respectively.
These values should be used in evaluating structural capability of plant structures to tornade 1
effects.
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O REFERENCES 1.
Institute for Disaster Research, Texas Tech. University, " Tornado and Straight Wind Hazard Probability for Oyster Creek Nuclear Power Reactor Site, New Jersey" May 1980.
2.
U.S. Department of Comerce, NOAA, " Climates of the States," Vol.1, 1974.
3.
U.S. Department of Connerce " Climatic Atlas of the United States,"
June 1968.
4.
U.S. Department of Connerce, NOAA, " Climates of the United States,"
1973.
5.
U.S. Department of Comerce, NOAA, " Local Climatological Data "
Newark, Trenton and Atlantic City, New Jersey.
6.
H. C. S. Thom, "New Distributions of Extreme Winds in the United States,"
Journal of the Structural Division, ASCE Vol. 94, No. ST7, July 1968.
7.
"American National Standard Building Code Requirements for Mininum Design Loads in Buildings and Other Structures " ANSI, A58.1-1972.
8.
" Seasonal Variation of the Probable Maximum Precipitation East of the 105th Meridian for Areas from 10 to 1,000 Square Miles and Durations of 6,12, 24, and 48 Hours," Hydrometeorological Report No. 33, Washington, D. C., April 1956.
9.
James A. Ruffner and Frank E. Baier, "The Weather Almanac," Gale Research Conpany,1974.
- 10. David M.' Ludlum, " Weather Record Book," Weatherwise, Inc.,1973.
- 11. J. L. Marshall, " Lightning Protection," John Wiley and Sons, New York, 1973.
- 12. "ASHRAE Handbook of Fundamentals," American Society of Heating, Refrigeration and Air Conditioning Engineers, Inc., New York 1976.
13, Paul Tattleman and Irving I. Gringorten, " Estimated Glaze Ice and i
Wind Loads at the Earth's Surface for the Contiguous United States,"
Air Force Cambridge Research Laboratories, October 1973.
- 14. U.S. Housing and Home Finance Agency, " Snow Load Studies,". Housing Research Paper No.19 May 1952.
- 15. 'U.S. Naval Weather Service, "World-Wide Airfield Sumaries " Vol. VIII.
United States of America, Part 4,1969.
- 16. Memo from Harold R. Denton (Assistant Director for Site Safety Division of Technical Review, NRR) to R. R. Maccary (Assistant Director for
. 17.
Engineering, Division of Technical Review, NRR) dated March 24,197S,
Subject:
Site Analysis Branch Position - Winter Precipitation Loads.
18.
Memo from Jerry Harbour (Chief Site Safety Research Branch, Division of Reactor Safety Research, RES) to L. G. Hulman (Chief, Hydrology-Meteorology Branch, Division of Site Safety and Environmental Analysis, NRR) dated August 14, 1978,
Subject:
Tornado Frequency Data for SEP Revi ew.
19.
Regulatory Guide 1.76, " Design Basis Tornado for Nuclear Power Plants "
U.S. Nut' ear Regulatory Commission, Washington, D.C.
20.
WASH-1300, " Technical Basis for Interim Regional Tornado Criteria "
U.S. Atomic Energy Commission, May 1974.
- 21..H. C. S. Thom, " Tornado Probabilities," Monthly Weather Review, October-Decembre 1963, pp. 730-736.
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