ML19003A312
| ML19003A312 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 12/21/2018 |
| From: | Florida Power & Light Co |
| To: | Office of New Reactors |
| Shared Package | |
| ML19003A318 | List:
|
| References | |
| L-2018-237 | |
| Download: ML19003A312 (7) | |
Text
2.4.7-1 Revision 0 Turkey Point Units 6 & 7 - IFSAR 2.4.7 Ice Effects The potential impact of ice effects on Units 6 & 7 is analyzed by evaluating historical hydrometeorological data from the USGS and NOAA and by examining the historical occurrences of ice events including a detailed search of the Ice Jam Database of the USACE. Results of this evaluation are summarized below.
The climate near Units 6 & 7 is subtropical marine with occasional freezing air temperatures (Reference 201). Freezing events were reported for the years 1977 and 1989 (Reference 202).
These freezing events are captured in the historical air temperature data obtained from the National Climate Data Center (NCDC) of NOAA (Reference 201). However, as described below, the corresponding daily average temperatures always stayed above freezing.
Water temperature data are obtained from USGS stations (Reference 203). Due to data quality, data from 13 stations of the available 449 stations within 30 miles (48 kilometers) of the plant area are used. These 13 stations are listed in Table 2.4.7-201 and are shown in Figure 2.4.7-201.
Figure 2.4.7-202 plots the water temperature at these stations for 1953-2007. The results indicate that water temperatures remain well above the freezing point with the minimum water temperature of 54.0°F (12.2°C) recorded on April 3, 1959, in the Snapper Creek Canal at Miller Drive near S. Miami Station (USGS No. 02290610) (Reference 203). The station is 20 miles (32 kilometers) northwest of the plant area.
Air temperature data of two meteorological stations are obtained from NCDC of NOAA (Reference 201). These stations are the Homestead Experimental Station (12 miles [19 kilometers]
west of the plant area, Cooperative ID 084091, period of record from 1910 to 1988 with a continuous record starting in 1931) and the Miami International Airport Station (24 miles [38 kilometers] north of the plant area, Cooperative ID 085663, period of record from 1948 to 2008). Figure 2.4.7-201 shows the location of the two meteorological stations. Table 2.4.7-202 summarizes subfreezing and corresponding daily average temperatures on record. Although the data at the two stations show below-freezing air temperatures with a minimum of 26°F (-3.3°C), measured on December 13, 1934, March 2, 1941, and February 16, 1943, at the Homestead Experimental Station, the daily average temperatures remained above freezing. The minimum daily average temperature of 38°F (3.3°C) occurred on December 24, 1989, at Miami International Airport Station (Reference 201).
There are no records of ice jams in Florida in the Ice Jam Database of USACE (Reference 204). Ice sheet formation, wind-driven ice ridges, and frazil or anchor ice formation are also precluded because subfreezing water and daily average air temperatures have not occurred based on the available historical data.
The design of the AP1000 reactor employs a passive containment cooling system that functions as the safety-related ultimate heat sink. This system is described in Subsection 6.2.2. The passive containment cooling system does not require an open surface water source to perform its safety-related function and, therefore, is not affected by surface water ice conditions.
2.4.7.1 References 201.
U.S. Department of Commerce, NOAA, NCDC Homestead Experimental Station (Cooperative Id 084091) and Miami International Airport (Cooperative Id 085663) Station Data. Available at http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?WWDI~StnSrch~
StnID~10100175 and at http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?WWDI~
StnSrch~StnID~20004250, accessed August 6, 2008.
2.4.7-2 Revision 0 Turkey Point Units 6 & 7 - IFSAR 202.
U.S. Department of Commerce, NOAA, Floridas Top 10 Weather Events of the 20th Century. Available at http://www.srh.noaa.gov/tlh/topevents/, accessed September 25, 2008.
203.
U.S. Geological Survey, Water-Quality Samples for the Nation, Water Temperatures for Biscayne Canal at S-28 Near Miami, Florida (Station #02286340), Little River Canal at S-27 at Miami, Florida (Station #02286380), Miami Canal at NW36 ST, Florida (Station
- 02288600), Miami Canal at Water Plant at Hialeah, Florida (Station #02288500), Miami Canal East of Levee 30 Near Miami, Florida (Station #02287395), Mowry Canal Near Homestead, Florida (Station #02290725), Snake Creek Ca at S-29 at North Miami Beach, Florida (Station #02286300), Snake Creek Canal at NW67 Ave Nr Hialeah, Florida (Station #02286200), Snake Creek Canal Below S-30 Nr Hialeah, Florida (Station
- 02286181), Tamiami Canal near Coral Gables, Florida (Station #02289500), Tamiami Canal Outlets L-30 to L-67A Nr Miami, Florida (Station #02289060), West Highway Creek near Homestead, Florida (Station #251433080265000), Snapper Creek C at Miller Drive Nr Smiami, Florida (Station #02290610). Available at http://nwis.waterdata.usgs.gov/usa/
nwis/qwdata, accessed September 25, 2008.
204.
U.S. Army Corps of Engineers, Ice Jam Database, Cold Region Research and Engineering Laboratory. Available at http://www.crrel.usace.army.mil/ierd/icejam
/icejam.htm, accessed August 13, 2008.
2.4.7-3 Revision 0 Turkey Point Units 6 & 7 - IFSAR Table 2.4.7-201 USGS Stations Used to Characterize the Typical Water Temperatures Near Units 6 & 7 USGS Station(a)
(a)
Water temperature data from 449 stations were examined. Only 13 stations listed in the table above have periodic measurements useful for analysis. In addition, although the period of records for the stations is from 1939 to 2007, data prior to 1953 are sporadic and were not considered in this evaluation.
Source: Reference 203 Station No.
Period of Record BISCAYNE CANAL AT S-28 NEAR MIAMI 2286340 1968-1996 LITTLE RIVER CANAL AT S-27 AT MIAMI 2286380 1958-1996 MIAMI CANAL AT NW36 ST 2288600 1967-1996 MIAMI CANAL AT WATER PLANT AT HIALEAH 2288500 1953-1979 MIAMI CANAL EAST OF LEVEE 30 NEAR MIAMI 2287395 1961-1980 MOWRY CANAL NEAR HOMESTEAD 2290725 1969-1980 SNAKE CREEK CA AT S-29 AT NORTH MIAMI BEACH 2286300 1967-1980 SNAKE CREEK CANAL AT NW67 AVE NR HIALEAH 2286200 1960-1980 SNAKE CREEK CANAL BELOW S-30 NR HIALEAH 2286181 1961-1975 TAMIAMI CANAL NEAR CORAL GABLES 2289500 1963-1980 TAMIAMI CANAL OUTLETS L-30 TO L-67A NR MIAMI 2289060 1953-1982 WEST HIGHWAY CREEK NEAR HOMESTEAD 251433080265000 2003-2007 SNAPPER CREEK C AT MILLER DRIVE NR SMIAMI 2290610 1958-1976
2.4.7-4 Revision 0 Turkey Point Units 6 & 7 - IFSAR Table 2.4.7-202 (Sheet 1 of 2)
Subfreezing and Corresponding Daily Average Temperatures at NCDC Stations Near Units 6 & 7 Homestead Experimental Station (Period of Record 1910 to 1988)
Date Temperature °F Date Temperature °F Minimum Average Minimum Average 12/03/1910 31.0 46.5 01/26/1951 30.0 48.0 02/03/1917 30.0 40.0 01/05/1953 32.0 53.5 02/06/1917 32.0 49.5 12/17/1953 32.0 49.0 01/02/1918 30.0 51.0 12/22/1954 30.0 49.0 01/04/1918 27.0 43.5 12/23/1954 32.0 53.5 03/02/1920 31.0 51.5 01/06/1956 31.0 51.5 12/17/1920 32.0 51.0 01/09/1956 29.0 46.5 02/28/1922 29.0 (a) 01/10/1956 31.0 50.5 12/28/1923 27.0 56.5 01/15/1956 27.0 49.0 01/02/1927 30.0 47.5 01/10/1958 31.0 44.5 01/12/1927 30.0 49.0 02/05/1958 27.0 48.5 03/04/1927 32.0 51.0 02/14/1958 32.0 49.0 01/29/1928 30.0 48.5 01/22/1960 29.0 44.0 12/29/1928 32.0 52.0 01/23/1960 30.0 44.5 03/05/1930 32.0 51.0 01/24/1960 28.0 45.5 12/12/1934 31.0 44.5 01/21/1961 32.0 49.5 12/13/1934 26.0 40.0 12/29/1961 32.0 47.0 12/12/1937 32.0 47.5 12/30/1961 32.0 47.5 01/28/1938 32.0 48.5 12/10/1962 30.0 44.0 01/20/1939 32.0 46.5 12/11/1962 29.0 48.0 01/28/1940 28.0 39.5 12/14/1962 30.0 44.5 01/29/1940 30.0 44.0 12/15/1962 31.0 48.5 01/30/1940 30.0 46.0 01/14/1964 32.0 41.5 01/11/1941 31.0 49.0 01/15/1964 30.0 46.5 03/02/1941 26.0 46.0 01/18/1965 30.0 45.0 02/03/1942 30.0 49.0 01/31/1966 31.0 48.0 03/04/1942 32.0 50.5 01/20/1971 30.0 41.5 02/16/1943 26.0 47.0 01/19/1977 31.0 39.5 12/20/1943 30.0 49.0 01/20/1977 27.0 44.0 02/09/1945 32.0 55.0 01/13/1981 31.0 46.0 02/06/1947 29.0 48.5 01/19/1981 32.0 50.0 01/02/1949 30.0 51.5 12/26/1983 31.0 39.5 11/27/1949 31.0 53.0 01/22/1985 30.0 41.0 11/29/1950 30.0 49.0 01/23/1985 32.0 43.0 12/19/1950 30.0 47.0 03/02/1986 32.0 48.0
2.4.7-5 Revision 0 Turkey Point Units 6 & 7 - IFSAR 12/20/1950 32.0 49.5
Miami International Airport (Period of Record 1948 to 2008)
Date Temperature °F Date Temperature °F Minimum Average Minimum Average 01/20/1977 31.0 45.0 01/22/1985 30.0 41.5 03/03/1980 32.0 42.5 12/24/1989 31.0 38.0 01/13/1981 32.0 46.5 12/25/1989 30.0 42.5 (a)
This data point is not available. However, based on all the data available, the daily average temperature is not expected to fall below freezing.
Source: Reference 201 Table 2.4.7-202 (Sheet 2 of 2)
Subfreezing and Corresponding Daily Average Temperatures at NCDC Stations Near Units 6 & 7 Homestead Experimental Station (Period of Record 1910 to 1988)
Date Temperature °F Date Temperature °F Minimum Average Minimum Average
2.4.7-6 Revision 0 Turkey Point Units 6 & 7 - IFSAR Figure 2.4.7-201 Meteorological and USGS Stations Near Units 6 & 7 Where Historical Air Temperature and Water Temperature Data Were Collected
2.4.7-7 Revision 0 Turkey Point Units 6 & 7 - IFSAR Reference 203 Figure 2.4.7-202 Water Temperatures at the USGS Stations Near Units 6 & 7
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