ML18088A511

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Airborne Thermal Infrared Survey Winter 1977 Quarter I Flight
ML18088A511
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 07/22/1977
From:
Texas Instruments Inc, Ecological Services
To:
Florida Power & Light Co, Office of Nuclear Reactor Regulation
References
Download: ML18088A511 (63)


Text

AIRBORNE THER'fAL INFRARED SURVEY WINTER 1977 QUARTER I FLIGHT 22 July 1977 Prepared for FLORIDA POWER

& LIGHT COMPANY P.O.

Box 013100 Miami, FL 33101 Prepared by TEXAS INSTRUMENTS INCORPORATED ECOLOGICAL SERVICES P.O.

Box 5621

Dallas, Texas 75222 Oocl<et 4'<~"$8 $ 8N 1(kO Control ~78/~'Ro'6 DatesjgagP8 rf9"i:~mat:

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TABLE OF CONTENTS Section REGULATORY PURPOSE FACILITY DESCRIPTION Title Page A.. PLANT LOCATION

. B; GENERATING UNIT DESCRIPTION C.

COOLING WATER SYSTEM CHARACTERISTICS II-1 II-1 II-3 IV GENERAL INTRODUCTION TO THERMAL INFRARED IMAGERY TECHNIQUES A.

INTRODUCTION B.

DATA COLLECTION C.

CALIBRATION D.

PROCESSING TECHNIQUES AND DATA PRESENTATION FORMAT RESULTS DISCUSSION III-1 III-1 III-5 III-6 V-1 V-1 APPENDIXES FLIGHT LOGS DATA PRINTOUTS Figure

.II-1 Site Location Map ILLUSTRATIONS Title Page II-2 II-2

'II-1

'III-2 Plant Intake and Discharge System Flight Pass, 1/28/77, 19:35 4

.'Plight Pass, 1/26/77, 19:16 II-4 III-2

'II-3 Plate IV-1 IV-2 St. Lucie Plant Isotherms Flight Pass 1/29/77, 14:44 (4', 1.5', 1', 0.5',

and combined 0', 1.5',

and 4')

Grey-Level Photo, Flight Pass, 1/29/77, services group

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SECTION I, REGULATORY PURPOSE The thermal infrared surveys per formed by Texas Ins truments for Florida Power 6 Light Company (FPL) are designed to demonstrate compliance with the requirements of the facility NPDES Permit and the. facility Environ-

, mental Technical Specifications.

The specific regulatory requirements are as follows:

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NPDES Permit FL0002208'pecial Conditions B., b., sentence 1 and 2.

The discharge into the Atlantic Ocean shall not cause a

0 0

temperature rise in excess of 0.8 C (1.5 F) above ambient surface temperature outside a

162 hectacres (400 acre) zone of mixing during the months of June through Septem-

ber, nor 2.2 C (4 F) rise during the remaining months.

In 0

0

addition, the surface temperature conditions within the zone of mixing will not exceed a rise of 3.1 C (5.5 F) over ambient temperature nor a

maximum temperature of 33.9 C (93 F) as an instantaneous maximum at any point.

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St.

Lucie Plant Unit No.

1 Technical Specifications, Ap-pendix B, Lxmxtxng Cond>.talons, 2.1.1, Specs.furcate.on, para-graph 1.

The thermal discharge of St.

Lucie Unit No.

1 into the Atlantic Ocean shall be limited to a

maximum release tem-perature of 111 F

and shall not cause a temperature rise 0

in excess of 1.5 F above ambient surface temperature out-0 side a

400 acre zone of mixing during the months of June through September, nor a

4 F rise during the remaining 0

months.

In addition, the surface temperature conditions within the zone of mixing shall not exceed a rise'f 5.5 F

0 over ambient temperature nor a

maximum temperature of 93 F

as an instantaneous maximum at any point.

In accordance with the last sentence of the. St.

Lucie Plant NPDES

~ $

Permit, Special 'Conditions B..; b.,

FPL-submitted to the EPA Regional Admin-I istrator on November 21,

1974, a

proposed thermal monitoring progr'am to satisfy the NPDES Permit and Environmental Technical Specifications monitor-ing requirements, which, included the surface area.

temperature limitation.

The thermal infrared survey performed for FPL and reported in this document complies with all the regulatory and monitoring program criteria relating to r

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the thermal infrared imagery requirements.

In addition, the four required flight patterns were to be performed approximately on a quarterly basis in order to obtain a representation of seasonal effects due to wind, tempera-ture and currents on the St.

Lucie Plant plume.

The four flights are to be represented in separate reports as Quarter I through Quarter IV Flights (see Technical Specifications Appendix B, 3.1.A.6)."

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  • Environmental Technical Specifications, St. Lucie Plant Unit No.

1 Technical Specifications, Appendix B.

I-2 services group

SECTION II FACILITY DESCRIPTION A.

PLANT LOCATION The plant is located on Hutchinson Island in St.

Lucie

County, about halfway between the cities of Fort, Pierce and Stuart on the east coast of Florida (see Figure. II-1).

The site is approximately 120 highway miles

, north of Miami, 225 miles south of Jacksonville and 150 miles east of Tampa.

Lake Okeechobee is approximately 35 miles to the southwest.

Hutchinson Island is approximately 22 miles long by 1 mile wide at

'ts maximum width.

The Atlantic Ocean lies to the

east, and the Indian River separates the island from the mainland to the west.

Indian River is not a river in the usual sense.

It is a long, thin, tidal lagoon stretching down the southeastern coast of Plorida between the mainland and a series of offshore islands.

The river is approximately 7200 feet wide at the plant site.

Hutchinson Island is generally flat.

Much of it consists of swamp covered with dense vegetation characteristic of Florida coastal mangrove swamps.

From the ocean shore the land rises slightly in a dune or ridge to approximately 15 feet above mean low water.

The plant is located on 1132 acres near the midpoint of the island.

The plant occupies approximately 300 acres adjacent to Big Mud

,Creek, an inlet off the Indian River,

.and across State Road A-1-A from the ocean-shore..

L B.

GENERATING UNIT DESCRIPTION St.

Lucie Unit No.

1 is a

nuclear unit of pressurized water design.

The reactor heat from the reactor's primary system coolant loops is

'transferred to a

secondary coolant system in two steam generators.

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the water in the secondary system is converted to steam to drive the tur-bine-generator; the secondary coolant steam is condensed back to water in a

condenser cooled by water from the Atlantic Ocean.

C.

COOLING WATER SYSTEM CHARACTERISTICS The condenser cooling water system is a once-through system with intake and discharge in the Atlantic Ocean.

Design flow is 530,000 gpm (1180 cfs) with a

maximum and normal temperature rise across the condenser of 24 F.

The major components of the system include (1) two intake lines, (2) one discharge

line, (3) an intake
canal, and (4) a discharge canal.

Figure II-2 presents a general plan view of the system.

The intake is located 1200 feet offshore and about 2400 feet south of the discharge structure.

As shown in 'Figure II-2, the top of the intake is situated approximately 8 feet below the water surface at mean low water.

Horizontal intake velocities will approach 1 fps.

Fro'm the ocean intake

point, water is drawn through two buried pipelines (ID 1g.5 feet) at 6 fps to the intake canal.

This 300-foot wide canal begins 450 feet west of the shoreline and carries the cooling water some 5000 feet to the plant intake structure at approximately 0

3 to 0

5 fps.

The plant intake structure consists of four bays, each containing

,one coarse

screen, traveling screen and circulating water pump.

Approach velocities to each bay will be: less than 1 fps.

From this structure the

~ water flows through a buried pipeline'o the condenser at about 7 fps..

The heated water leaving the condenser flows through a

buried pipeline for 500 feet to the discharge

canal, This open canal is 200 feet wide and extends approximately 1735 feet to a point 400 shoreline.
There, the discharged water is carried in a

feet west of the 12-foot diameter concrete pipe. buried under the beach and ocean floor out to the ocean dis-charge structure, located 1200 feet out from the shoreline.

II-3 services group

The ocean discharge

sructure, shown in Figure II-2, consists of a

short transition section and a

Y-type, high-velocity jet discharge; each port will be 7.5-feet in diameter.

Ocean depth at the discharge point is

-18 feet (MLW).

The centerline of the discharge ports is 30 feet.below the water surface.

Exit velocity of the discharge water from each port is

13 fps.

The design is a high-momentum

type, which produces a relatively high degree of entrainment of ambient
water, thus enhancing the diluting charac-teristics of the outfall.

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SECTION III GENERAL INTRODUCTION TO THERMAL INFRARED IMAGERY TECHNIQUES A.

INTRODUCTION Thermal infrared imagery in the 8-to 14-micrometer portion of the electromagnetic spectrum was collected in the Atlantic Ocean area of the St.

Lucie Plant intake and discharge.

The survey provides surface thermal data compiled from more than 1,000,000 points per square mile.

All plume data were taken within 1 minute, allowing illustration

'f the thermal mixing pattern and other areas of warm water in a

near-synoptic manner.

Ambient surface temperatures were observed by ground personnel during the period of airborne data collection and used for the purpose of,calibrating the computer-printed temperature maps.

Surface thermal data were developed into a

series of computer-printed maps; each computer map of the discharge area was then-optically changed to a scale of 1 inch = 500 feet with an overlay map of the discharge presented at l,inch

=

500 feet.

Additionally, computer printouts of en-larged areas, included as an appendix were used for calibration purposes.

B.

DATA COLLECTION infrared imagery is pr'oduced by a series of scan lines perpendicu-lar to the flight direction and is similar in appearance to strip photo-graphy.

Relative radiometric temperature differences are represented by the

/

imaged grey, tones as i;1lus tra ted in Figures III-'1, and III-2.

Light tones, as they appear on the positive

~ print 'of infrared

imagery, represent higher

'radiometric. temperatures.

Dark image tones correspond to lower radiometric temperatures.

A Texas Instruments RS-310D airborne infrared scanning system was used to collect the thermal infrared data over the St.

Lucie Plant.

This III-1 services group

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system records data in the 8-to 14-micrometer portion of the electromag-netic

spectrum, and temperature reference sources are located within the field-of-view of the scanner system to allow temperature calibration of the image tones for map compilation.

At the start of each

scan, the detector was focused first on a hot calibrated radiation source and then on a cold calibrated source.

These two sources thus provide verification of calibration of temperature and system gain 'on each scan line.

To aid in analyzing data, the two radiation sources usually are set

. near the highest and lowest radiation expected from the water to be measured.

As a further aid to produce

clear, usable data from these
scans, the detector voltage was digitized each 1/2000 radian of scan angle (0.0286).

The resulting computer tape has one scan line per record on the tape with 1890 points digitized 'on that tape for each record (scan line).

The digitized information, which included the calibration

sources, was recorded on a special high-speed digital tape recorder.

This is a special tape not directly usable on a

standard

computer, due to its format and its high packing density.

Therefore, the areas of interest are copied from the special tape onto a standard computer tape (9 track 800 BPI) by slowing the special tape to 1/16 of original speed and employing programs in a TI 980 computer used especially for this purpose.

A map is formed by printing a

series of scan lines (computer records) along a

computer page.

Each digitized point is a measure of the radiation from the surface as modified by the atmosphere between the surface and the scanner.

Since infrared radiation will not pass through water, the radiation p'ower is a 'function of the surface only; no radiation comes from below the surface.

Other factors are involved such as the following:

1)

Radiation efficiency of water 2)

Angle of water surface to the scanner III-4 services group

3)

Difference between temperature of surface molecules and temperature of water 1 to 6

inches below the surface, where it can be measured by a

thermometer.

4)

Atmospheric loss or absorption 5)

Difference in atmospheric path length.

Factor 1) is small,.about 0.98

percent, and is calibrated out through use of ground measurements.

Factor

2) is also small and is averaged out in the computer; it can be seen as +0.3 F when looking at waves.

Factor

3) is small but is also calibrated out through use of ground temperature measurements.

Factor 4) i's variable, depending on water vapor, water droplets in

'the air, and temperature of the droplets; most can be calibrated out through use of ground measurements.

Factor

5) is a function of scan angle and is "small for the 30 off-axis scan angles used in the calibrated
scanner, therefore no correction is made for this factor.

C.

CALIBRATION It is possible to have sufficiently calibrated information by using only the calibrated sources and flying one extremely low pass along

,with the normal higher pass.

However, when possible, final calibration of the data is done 'by using water. bodies in the areas of measurement as hot

'nd cold calibration sources.

At the St.

Lucie plant site, the intake and discharge canals provided two sources for this calibration.,

For final calibration; three areas were used:

the intake canal, I

'the discharge'canal, and an area of ocean. outside the influence of the hot water discharge canal.

Where

possible, this ocean area was chosen in the vicinity of the intake structure.

A computer printout was made of each of these three

areas, and 400 digitized elements were averaged to obtain the average value of the radiation number received in that area.

Using. average radiation numbers derived for the inlet canal, discharge canal and ocean services group

area, the computer read from the computer tape and printed out a

map of surface water temperature over the entire area covered by the tape..

Using the mathematics of the

scanner, aircraft height, and aircraft speed, the map was scaled to fit existing maps.

D.

PROCESSING TECHNIQUES AND DATA PRESENTATION FOlBfAT The recorded

'airborne thermal infrared data were prepared in two formats:

qualitative image presentations and quantitative isothermal maps.

The qualitative data included in this 'eport illustrates the qualitative, near-synoptic view of surface-temperature variations of the survey area-depicted as image tones.

These grey-tone maps have some pano-ramic distortion on the sides, making a scale change-out on the sides of the "heat picture."

To make a

computer printout of temperature, flight data are sampled along the x direction (across flight path) and along the y direction (along 'flight path) in a ratio of samples to produce the same map seal'e in both x and y directions.

At the same

time, the panoramic distortion is re-moved in the x direction.

The resulting map is 'hus reasonably distortion-free.

Such a

map can then be enlarged or compressed optically to any desired scale.

Isotherm lines are drawn directly on the printed temperature map and an isotherm line map traced off of these lines.

The digital number of radiation for each point is multiplied by a scale factor that produces a

scale of numbers in degrees Fahrenheit or Centigrade, as desired.

An 'offset numb'er is then applies to make one of the areas printout as the zero reference.

. It is easier to visu'alize a

plume if it is referenced against a zero background rather than printing the actual temperature as read from a

thermometer.

The scaling factor used to produce Fahrenheight degrees and the offset factor to produce a zero reference area in the printout are derived from a calibration printout of enlarged areas which show the intake

canal, discharge
canal, and a reference ocean area.

This calibration printout is adjusted to follow closely the delta tempera-tures as measured in the canals from the ground.

III-6 services group

SECTION IV RESULTS FLIGHT PASS 1/29/77, Time 14:44 This flight pass was taken with a wind of 11 knots from a direc-tion of 350 with the resulting surface plume widening outward (probably 0

caused by momentum) in the direction of the outlet nozzles; then spreading southeastward (probably caused by wind) parallel to the shore.

The plume splits (cause unknown). as it flows southward.

The following parameters were measured during overflight:

Wind (t 33 feet height N at 12 mph 0

Ambient air temperature over land 58.2 F

Ambient ocean temperature 16 C

0 Tide (i 15:15 +2.18 feet Discharge canal elevation 10.15 feet above MLW Plant delta T (inlet to outlet of plant) 19.8 F

Discharge flow 513,000 gpm

% Reactor power 82 percent Gross power generated 681 Megawatts Intake canal temperature (taken at east end of canal) 19.2 C (66.6 F)

Discharge canal temperature (taken 300 feet from east end of canal) '2+

C '(84.7 F)

Temperature difference between canals 10.1 C (18.18 F)

Calibration:

The ground measurements showed a

differential between canals of.18.18 F, the calibration printout showed a differential 0

between canals of 18.19 F.

This printout showed the intake canal surface to be the same temperature as the surface temperature of the ambient ocean.

IV-1 services group

SUMMARY

OF FINDINGS 0

The maximum surface temperature within the plume was 4 F.

Tem-perature isotherms and their respective

'areas for various temperatures above ambient (DT) are listed below.

AT Isotherm Temperature 4 F

. 1.5 F

1 F 0.5 F

Area

~ 3.1 acres 15.6 acres 22 acres 38.3 acres Overlay 1/29/77 14:44 1/29/77 14:44 1/29/77 14:44 1/29/77 14:44 Temperature distributions found offshore of the plant are pre-sented in isothermal

map, Plate IV-1 and grey-toned
photo, Plate IV-2.

IV-2 services group

Plate IV-l.

Isotherms, Offshore of St. Lucre Plant IV-3

ST. LXIE PLcIINT ISOTHHK PLATE IV-1 FLIGHT PASS 1/29/77, TIME 14:44 REACTOR POWER 82K DISCHARGE FLOW 513,000 GPM WIND N 12 MPH INTAKE CANAL 66.6'F DISCHARGE CANAL 84.7'F HIGH TIDE 15.6 ACRES 1.5'F 3.1 ACRES 4'E Below O'

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ST, LUCIE PLANT ISOTHEIK PLalF. IV-1 l

FLIGHT PASS 1/29/77, TIME 14:44 REACTOR POWER 825 DISCHARGE FLOW 513,000 GPM WIND N 12 MPH INTAKE CANAL 66.6'F DISCHARGE CANAL 84.7'F HIGH TIDE 3.1 ACRES 4'F STATE ROAD AIA SCALE 0

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75 I50 FEET IOOO 300 METERS l500 2000 600

ST, LUCIE PU5T ISOTHFPE PLATE IV-j.

FLIGHT PASS 1/29/77, TINE 14:44.

C REACTOR POWER 82K OISCHARGE FLOW 513,000 GPM WINO N 12 MPH INTAKE CANAL. 66;6'F DISCHARGE CANAL 84. 7'F HIGH, TIDE 15.6'CRES 1.5'F-STATE.. ROAD AIA.

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ST, WCIE PlNT ISOTHHK PLATE IV-1 FLI6HT PASS 1/29/77.

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REACTOR POWER 82K DISCHARGE FLOW 513,000 GPM WIND N 12 MPH INTAKE CANAL 66.6'F DISCHARGE CANAL 84 7'F HIGH TIDE 22.0 ACRES 1'F STATE ROAD AIA 0

250 500 SCALE 0

75 I50 FEET IOOO 300 METERS I500 2000 600

ST, LUCIE PLANT ISOTHEfK PLATE IV-1 A

FLIGHT PASS 1/29/77, TINE 14:44 REACTOR POWER 82"-

DISCHARGE FLOW 513,000 GPM WINO N'2 MPH INTAKE CANAL 66.6'F OISCHARGE CANAL 84.7'F HIGH TIOE 38.3 ACRES.5'F STATE ROAD AIA 0

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SECTION V

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DISCUSSION The shape and size of the surface plume appeared to be strongly

'affected by the wind direction and velocity.

-In a little or no wind condi-

tion, the plume spread eastward and northeastward, following the direction of the outle't nozzles and showed no great surface areas of warm water.

When the wind was greater that 7 knots, the surface plume measured with infrared overflights always followed the general wind direction.

A strong wind from south or downshore appeared to quickly bring the warm water to the surface in a narrow point, spreading it quickly down-wind over' large thin surface.area.

A strong wind from the north appeared to catch the warm water as it spread eastward into a

wide starting

point, spreading the plume downwind into a wide thin surface area.

In other words,

'a northward blowing plume started with a

narrow point while the southward blowing plume spread eastwardly into a wide starting point.

As can be seen on the isothermal

map, Plate IV-1 and the grey-level photo, Plate IV-2, the surface water nearshore was much.colder than the ambient ocean surface 1500 feet from shore.

The shore temperature of 0

63 F was 3.5 degrees colder than the cold area extending out 200 to 700 feet from shore where a

sharp increase in temperature occurred to the ambient 0

ocean temp'erature of 66.5 F.

'This cold water next to the shoreline is

'probably the same cold water which permeated the entire area from the plant

'orthward on the 25th and 26th of January, when overflights were made with-out the digitizer.

At that time the canal temperature was 15.2 C (59.4 F) and the infrared overflight did not recor'd cooler water nearshore.

However, on 'he 26th'f
January, a

large mass of warm water began showing.along shore,'

to 4 miles south of the plant, and this mass separated from the Vshore (Overflight 1/26/77, 19:06) as it came closer to the plant.

The edge of the mass was about 1.5 miles offshore of the plant on the 26th of January (Overflight 1/26/77, 19 16).

The first edge "jump" in temperature of that mass was about 4 deg'rees above ambient; the second edge "jump" was about 5

degrees more for a total of 9 degrees.

V-1 services group

By the 28th and 29th of January, this warm water effect had moved

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northward along the shore to cover the entire vicinity of the plant.

The only place where the original water temperature could be seen in the variable 200 to 700 foot nearshore

area, which was 2 to 3.5 degrees colder.

This mass of warm water is too large to have been caused by the power plant; it appears more likely to be an offshoot of the Gulf. stream.

It flows northward along the shore like a.river of warm water until it reaches the vicinity of Stuart-Ft.

Pierce where it turns and angles obliquely from shore.

The exact point where the turn and separation from shore occurs changes with time, with at least a

4 mile change being observed during the January 25-29 period.

V-2 services group

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APPENDIX A FLIGHT LOGS

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1 LIGHT LOG St. Lucie DATE 1-28-77 TAKE OFF WIND S-5 TAKE OFF TIME 19-'10 TAKE OI'F PLACE Intake 18.3'C Discharge 28.2'C TAPE FT FILM FRAME HEADING ALT SPEED ON OFF 19:28 19:35 ON OFF OFF 260 170 8,000 15/26

FLIGHT LOG St. Lucie Plant DATE 1-29-77 TAKE OFF WIND N-19 kt TAKE OFF TIME 14'25 TAKE OFF PLACE Stuart Intake Canal 19.2'C Discharge Canal 29.3'C RUN //

TIME TAPE FT FILM FRAME HEADING ALT SPEED i

ON 14'44 14:48 14:52 ON OFF ON 290 4,000 4,000 4,000 Cal Sources 15/26

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APPENDIX B DATA PRINTOUTS servfces group

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