ML19341A569
| ML19341A569 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 12/15/1980 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Linder F DAIRYLAND POWER COOPERATIVE |
| Shared Package | |
| ML19341A570 | List: |
| References | |
| TASK-02-02.A, TASK-2-2.A, TASK-RR LSO5-80-12-036, LSO5-80-12-36, NUDOCS 8101270130 | |
| Download: ML19341A569 (7) | |
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NUCLEAR REGULATORY COMMISSION y
E W ASHINCTON. D. C. 20f 55 t
i s, v y Docket No. 50 409 DEC 15 sic LS05-80-12-036 Mr. Frank Linder General Manager Dairyland Power Cooperative 2515 East Avenue South Lacrosse, Wisconsin 54601 Cear Mr. Linder:
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SUBJECT:
LACROSSE - SEP TOPIC II-2. A The SEP review of Topic II-2. A " Severe Weather Phenomena" has been ccepleted. Enclosure 1 is the staff's safety evaluation (SE) for the Lacrosse site. The review was done in conformance witn Standard Review Plan 2.3.1 and covers extreme temperatures, lightning strikes, snow and ice loads and wind and tornado loadings. The wind and tornado loadings analysis was performed by the Texas Tech. University, Institute for Disaster Research. Enclosure 2 is the Texas Tech. report. Please inform us if your as-built facility differs from the licensing basis assumed in our assessment within 30 days of receipt of this letter.
You will note that the SE identifies a design basis tornado with a probsbility of 10-7 per year and is consistent with a Regulatory Guide 1.76 design basis tornado. The staff intends to evaluate the structural characteristics of specific structures, systems and components important to safety to determine their ability to withstand the severe weather loadings. The plant design parameters will then be compared to the pruability of occurrence of the wind as a part of our structural evaluation. This comparison will be used to evaluate the necessity of design changes.
Sincerely, S
DEnnisH. CrutchfiUd, C@ef l
l Operating Reactors Branch 15 Division of Licensing
Enclosures:
As stated cc w/ enclosures:
See next page 8101270l N
Mr. Frank Linder LA CROSSE BOILING WATER REACTOR DOCKET NO. 50-409 1
CC Frit: Schucert, Esquire Director, Technical Assessment Staff Attorney Division Dairyland Power Cooperative Office of Radiation Programs 2615 East Avenue South (AW-459)
La Crosse, Wisconsin 54601 U. S. Environmental Protection Agency O. S. Heistand, J r., Esquire Crystal Mall #2 Morgan, Lewis & Bockius Arlington, Virginia 20460 1800 M Street, N. W.
Washington, D. C.
20036 U. S. Environmental ProtMtion Agency Mr. R. E. Shimshak Federal Activities Branch La Crosse Boiling Water Reactor Region V Office Dairylana P>er Cooperative ATTN: EIS COCRDINATOR P. O. Box 135 230 South Dearborn Street Genoa, Wisconsin 54632 Chicago, Illinois 60604 Coulee Region Energy Coalition Charles Secnhoefer, Esq., Chairman ATTN: George R. Nygaard Atomic Safety and Licensing Board P. O. Box 1503 U. S. Nuclear Regulatory Comission La Crosse, Wisconsin 54601 Washington, D. C.
20555 La Crosse Public Library Dr. George C. Anderson B00 Main Street Department of Oceanography La Crosse, Wisconsin 54601 University of Washington Seattle, Washington 98195 U. S. Nuclear Regulatory Comission Resident inspectors Office Mr. Ralph S. Decker Rural Route #1, Box 225 Route 4, Box 1900 Genoa, Wisconsin 54632 Cambridge, Maryland 21613 Town Chairman Dr. Lawrence R. Quarles Town of Genoa Kendal at Longwood, Apt. 51 Route 1 Kenneth Square, Pennsylvania 19348 Genoa, Wisconsin 54632 Thomas S. Moore Chairman, Pubiw Service Comission Atomic Safety and Licensing Appeal Board of hisconsin U. S. Nuclear Regulatory Comission Hill Farms State Office Building Washington, D. C.
20555 l
Macison, Wisconsin 53702 Ms. Anne K. Morse Alan S. Rosenthal. Esq., Chairman Coulee Region Energy Coalition l
Atomic Safety and Licensing Appeal Board Post Office Box 1583 U. S. Nuclear Regulatory Comission Lacrosse, Wisconsin 54601 i
Washington, D. C.
20555 U. S. Nuclear Regulatory Comission Mr. Frederick Milton Olsen,111 Resident inspectors Office 609 North lith Street Rural Route #1, Box 225 Lacrosse, Wisconsin Genoa, Wisconsin 54632 l
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ENCLOSURE 1 Systematic Evaluation Program Meteorology La Crosse Boiling Water Reactor Topic II-2.A Seven Weather Phenomena Extreme meteorological conditions and severe weather phenomena in the La Crosse site region were examined to determine if safety-relatad 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 La Crosse site and which should be examined relative to the current design.
Normal daily temperatures range from a minimum of seven degrees Fahrenheit in Janu'ary to a maximum of 83 degrees Fahrenheit in July. Measured extrema temperatures for the site region are 108 degrees Fahrenheit which cc urred in July 1936 and -43 digt::1, Fahrenheit which occurred in January 1873. The extreme maximum and minimum temperatures appropriate at the La Crosse site for general plant design (i.e., HVAC systems) are 90 degrees Fahrenheit (equalled or exceeded 1% of the time) and
-12 degrees Fahrenheit (equalled or exceeded 99% of the time).
Thunderstorms occur an average of 41 days per year in the site region.
l Based on the innual number of thunderstorm days, the calculated annual flash density of ground lightning strikes is six flashes per square l
2-kilcmeter. A structure with the approximate d!:.ensions of the la Crosse reactor building can be expected to be subjected, on the average, to one strike every six years.
The design wind speed (defined as the "f astest-mile" wind speed at a height of 30 feet above ground level with a return period of 100 years) acceptable for the site region is 90 miles per heur. On the average, hail storms cccur about three days annually, and freezi,ng rain cccurs approxi.?ately 12 days per years. The maximum radial thickness of ice expected in the site regien is abouc cne inch.
Mean annual snewfall in the site regien is approximately 42 inches resulting in a normal winter precipitaticn snow load on a flat surface of about 35 pcunds per square foot. The naximum monthly snowfall occurred in January 1929 and totaled 39.6 inches. The maximum snowfall from a single storm totaled 18.5 inches. The maximum measured snew depth on the ground for the site regien is 31 inches. Based en the 100-year recurrence accumulated ground snowpack and probable maximum winter precipitation for the site region, the extreme winter precipitation snow load is about 90 pcunas per square foot.
Tcrnadoes have been reported la6 times during the period 1950-1977 within an approximate 50 mile radius frem the La Crosse site. On the average, five tornadees can be expected to eccur in the vicinity of the
3-La Crosse site every year.
Based on the path length and width data from tornadoes occurring in the site region, the recurrence interval for a tornado at the site is calculated to be about 700 years.
The assumptions used in Regulatory Guide 1.76 provide an adequate design basis tornado for the site region. These characteristics include a maximum windspeed of 360 miles per hour (a maximum rotational windspeed of 290 miles per hour plus a maxinLm translational windspeed of 70 miles per hour),
a maximum pressure drcp of three pounds per square inch, and rate of pressure drop of two pounds per square inch per second.
Based on actual tornado occurrences in the site region area (112 tornadoes with available data) and using the procedures discussed in WASH-1300, a
" site-specific" design basis tornado (with a probability of occurrence of 10-7 per year) can be calculated. For the La Crosse site, the char-acteristics of tornadoes occurring within a 50-mile radius are identical to those provided in Regulatory Guide 1.76.
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4 References U.S. Department of Commerce, NOAA, " Climates of the States " Vol.1, 1974.
U.S. Department of Commerce, " Climatic Atlas of the United States,"
June 1968.
U.S. Department of Commerce, NOAA, " Climates of the United States,"
1973.
U.S. Department of Commerce, NOAA, " Local Climatological Data,"
La Crosse (1974), and Madison, Wisconsin (1976).
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.
"American National Standard Building Code Requirements for Minimum Desi n Loads in Buildings and Other Structures," ANSI, A58.1-1972.
5
" 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.
James A. Ruffner and Frank E. Baier, "The Weather Almanac," Gale Research Company,1974.
David M. Ludlum, " Weather Record Book," Weatherwise, Inc.,1973.
J. L. Marshall, " Lightning Protection " John Wiley and Sons, New York, 1973.
"ASHRAE Handbook of Fundamentals," American Society of Heating, Refrigeration and Air Conditioning Engineers, Inc., New York 1976.
Paul Tattleman and Irving I. Gringarten, " Estimated Glaze Ice and W1.nd Loads at the Earth's Surface for the Contiguous United States,"
Air Force Cambridge Research Laboratories, October 1973.
U.S. Housing and Home Finance Agency, " Snow Load Studies," Housing Research Paper No.19, May 1952.
U.S. Naval Weather Service, "World-Wide Airfield Summaries," Vol. f!!I, United States of America, Part 4,1969.
Memo from Harold R. Denton (Assistant Director for Site Safety, Division of Technical Review, NRR) to R. R. Maccary (Assistant Director for N
5-e Engineering, Division of Technical Review, NRR) dated March 24,19f5,
Subject:
Site Analysis Branch Position - Winter Precipitation Loads.
Memo from Jerry Harbour (Chief, Site Safety Research Branch, Division i
of Reactor Safety Research, RES) to L. G. Hulman (Chief. Hydrology-8 Meteorology Branch, Division of Site Safety and Environmental Analysis, f
NRR) dated August 14, 1978,
Subject:
Tornado Frequency Data for SEP Revi ew.
/
Regulatory Guide 1.76, " Design Basis Tornado for Nuclear Power Plants,"
U.S. Nuclear Regulatory Commission, Washington, D.C.
WASH-1300, " Technical Basis for Interim Regional Tornado Criteria."
U.S. Atomic Energy Commission, May 1974.
H. C. S. Thom, " Tornado Probabilities," Monthly Weather Review, October-December 1963, pp. 730-736.
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