ML18283B696

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Environmental Radioactivity Levels, Brown Ferry Nuclear Plant, January-June 1975
ML18283B696
Person / Time
Site: Browns Ferry  Tennessee Valley Authority icon.png
Issue date: 12/31/1975
From:
Tennessee Valley Authority
To:
Office of Nuclear Reactor Regulation
References
RH-75-4-BF2
Download: ML18283B696 (44)
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Text

RH-75-4-BF2 ENVIRONMENTAL RADIOACTIVITYLEVELS BROWNS FERRY NUCLEAR PLANT January-June 1975 DECEMBER 1975

r CONTENTS introduction ~ ~ 0 ~ 0 ~ ~ 0 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Figure 1 Tennessee Valley Region ~ ~ 2 Table 1 Environmental Radioactivity Sampling Schedule ~ ~ 4 Figure 2 Atmospheric and Terrestrial Monitoring Network . ~ ~ 5 Atmospheric Monitoring .

Table 2 Radioactivity in Air .

Table 3 Maximum Permissible Concentrationq for Nonoccupational Exposure . ~ ~ 11 Table 4 - Rain ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 12 Table 5 Total Fallout Deposited ~ ~ ~ ~ 14 Table 6 Charcoal Filters . ~ ~ ~ ~ 15 Terrestrial Monitoring . 17 Figure 3 Milk Monitoring Network ~ ~ 18 Table 7 Milk ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 20 Table 8 - Vegetation ~ ~ 21 Table 9 Soil ~ 4 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 23 Table 10 Private Well Water 24 Table ll Public Water Table 12 Environmental Gamma Radiation Levels ~ ~

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25 26 Table 13 Poultry and Food Crops ~ ~ 27 Reservoir Monitoring 31.

Table 14 Sampling Schedule Reservoir Monitoring . ~ ~ 33 Figure 4Reservoir Monitoring Network . ~ ~ 34 Table 15 River Water, Dissolved Activity. ~ ~ 35 Table 16 River Water, Total Activity ~ ~ 36 Table 17 River Water 0 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 37 Table 18 F ish ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 38 Table 19 Plankton . ~ ~ 39 Table 20 Sediment 0 ~ ~ ~ ~ ~ 0 ~ ~ ~ ~ ~ ~ 40 Table 21 C 1am ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 41 Quality Control 43 Data Analysis 43 Conclusions 43

ENVIRONMENTAL RADIOACTIVITY LEVELS BROWNS FERRY NUCLEAR PLANT JANUARY-JUNE 1975 Introduction The Browns Ferry Nuclear Plant (BFNP), operated by the Tennessee Valley Authority, is located on a site owned by TVA containing 840 acres of land in Limestone County, Alabama, bounded on the west and south by Wheeler Reservoii (see figure 1). The site is 10 miles southwest of Athens, Alabama, and 10 miles north-west of Decatur, Alabama. The plant, when completed, will consist of three boiling water reactors; each unit is rated at 3,293 MWt and 1,098 MWe. Unit 1 achieved criticality on August 17, 1973, and began commercial operation on August 1, 1974. Unit 2 began commercial operation on March 1, 1975. However, neither unit .has operated since March 22, 1975, when a fire in the cable trays necessitated. the shutdown of both reactors.

k The preoperational environmental monitoring program established a baseline of data on the distribution of natural and manmade radioactivity in the environment near the plant site. However, seasonal, yearly, and random variations in the data were observed. In order to determine the potential increases in environmental radioactivity levels caused by the plant, comparisons were made between data for indicator stations (those near the plant) and control stations (those remote from the plant}.

Field staffs in the Division of Environmental Planning and the Division of Forestry, Fisheries, and Wildlife Development carried out the sampling program outlined in tables 1 and 14. Sampling locations are shown in figures 2 and 4. All the radiochemical and instrumental analyses were conducted in a central laboratory at Muscle Shoals, Alabama. Alpha and beta analyses were performed on Beckman Low Beta II and Beckman Wide Beta II low background proportional counters. Two Nuclear Data Model 2200 multichannel analyzer systems were used to analyze the samples for specific gamma-emitting radionuclides. Data were coded and punched on IBM cards or automatically printed on paper tape for computer processing specific to the analysis conducted. An IBM 370 Model 165 computer, employing an Alpha-M least squares code, was used to solve multimatrix problems associated with estimating the activities of the gamma-emitting nuclides.

A primary difficulty in sample analysis was the detection of very low radionuclide concentrations. The minimum sensitivities are those concentrations where the percent counting error is 100/, calculated assuming a 3-sigma counting error, when standard sample sizes and counting time are employed. The minimum sensitivities are therefore those concentration values below which it is impossible to state, at the 99 percent confidence level, that any amount of radioactivity above background exists in the sample. The sensitivities,. based wholly on counting sta'tistics, are listed for gross alpha, gross beta, and tritium analyses'.

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Standard sensitivities are not listed for specific gamma-emitting radionuclidhs degermined by thy Alpha-M program because they are not available. Since the minimum sensitivities are not defined, some concentrations reported may not represent actual concentrations.

They may be mathematical artifacts of the Alpha-M program. Concentra-tions vith errors {estimated by the Alpha-M program) larger than the reported concentrations are listed as "not detectable" (ND). The errors reported define the statistical distributions of the errors estimated by the Alpha-M least squares program.

Table I

'll ENVIRONMENTAL RADIOACTIVITY SAMPI.INC SCHEDULE Air Charcoal Rain- Heavy Particle River Well Public Aquatic'Life Ptatl l clc Pelt Milt c c ell ~ec cel Mlle.Mt Mt Mt dedl t Muscle Shoals W W M M M Laurenceburg W W M M Fayetteville W W M M Q Cullman W W M M Q Rogersville W W M M Athens W W M M Q Decatur W W M M Q Court land W W M M Q Site hW-1 W W M M' Site N-2 'W W, M M Site hE-3 W W M M Q Site NW-4 W W M M Q Q Farm B Farm Bi M W Farm H M W Fata T M W Farm L M W Farm G (Control) M W Wheeler Dam Elk River Wheeler Reservoir Champion Paper Co.

Wilson Dam Colbert Steam Plant Clements School Tovn.Creek Trinity W - Weekly M - Monthly Q - Quarterly

Figure 2 ATMOSPHERIC AND TERRESTRIAL MONITORING NETWORK RM-28F LAWRENCEBURG yPULASKI FAYETTEVILLE QP' RM-38F PM-IBF WILSON WHEELER OAM f

RPG RSVIL FLORENCE ATHENS PM-28F EFFIEL MUSCLE HUNTSVILLE SHOALS BROWNS FERRY NUCLEAR PL NT RM-I BF LEIGHTON TUSCUMBIA COURTLANO PM-4 F DECAT R PM-3BF0 IO MILES RUSSELLVILLE g GUNT SVIL HARTSELLE DAM 25 S HALEYVILLE RM"58F CULLMAN 45 MILES Q- ENVIRONMENTAL MONITORING STATION NOTE: THE FOLLOWING SAMPLES ARE COLLECTED FROM EACH STATION:

AIR PARTICULATES RAINWATER RADIOIODINE SOIL HEAVY PARTjCLE FALLOUT VEGETATION

ATMOSPHERIC MONITORING The atmospheric monitoring network is divided into three groups. Three local air monitors are located on the plant site in the quadrants of greatest wind frequency. One additional station is located at the point of maximum predicted offsite concentration of radionuclides. Four perimeter air monitors are located at distances out to 10 miles from the plant, and four remote air monitors are located at distances out to 45 miles. These monitoring stations are shown in figure 2. The remote monitors are used as control or base-line stations. At each monitor, air is continuously pulled through a Hollingsworth and Voss HV-70 particulate filter at a regulated flow of 3 ft /min. In series with, but downstream of, the particulate 3

filter is a charcoal filter used to collect iodine. Each monitor has a collection tray and storage container to obtain rainwater on a continuous basis and a horizontal platform that is covered with gummed acetate to catch and hold heavy particle fallout. Thermo-luminescent dosimeters are used to record gamma radiation levels at each remote and perimeter station.

Each of the local and perimeter air monitors is fitted with a GM tube that continuously scans the particulate filter. The disintegration rate of the atmospheric radioactivity is continuously recorded at each station and radiotelemetered into the plant. These stations will detect any significant airborne release from BFNP.

Air filters are collected weekly and analyzed for gross beta activity. No analyses are performed until 3 days after sample collec-tion. The monthly results are combined for each station to obtain a semiannual average; The average semiannual concentr'ations for the stations in each group of monitors (local, perimeter, and remote) are combined to yield a semiannual average for each group. These data are presented in table 2.

With reference to table 3, which contains the maximum permissible concentrations (MPC) recommended by 10 CFR 20 for nonoc-cupational exposure, it is seen that the maximum beta concentration is 0.20 percent MPC.

Rainwater is collected and analyzed for gross beta activity, specific gamma-emitting isotopes, and radiostrontium. For the gross beta analysis, a maximum of 500 ml of the sample is boiled to dryness and counted. A gamma scan is performed on a 3.5-liter monthly sample and the results averaged by group location as was done with the air filter data. The strontium isotopes are separated chemically and counted in a low background system. The results are shown in table 4. The highest value reported for beta activity is 0 53 percent MPC for drinking water.

The gummed acetate that is used to collect heavy particle fallout is changed monthly. The sample is ashed and counted for gross beta activity. The results are given in table 5.

filters are collected and analyzed for radioiodine.

'harcoal The filter is counted in a single channel analyzer'ystem. The data are shown in table 6, ~here the highest value reported is 0.06 percent MPC for I.

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Table 2 RADIOACTIVITY IN AIR

/

Specific Radionuclides in

.No. of Nonvolatile Beta* Composite Samples Location ~Sam les Max.. Mia. 'Av (Avera e)

Local 0.047 0.086 14lp144 .021 + .004 Northwest 26 0. 186 Ce 51 ND LM-4BF 26 0. 173 0.054 0.092, 131I ND 1031106 Ru .013 + .006 North 26 0.197 0.049 0.086 134C ND 137 Cs .003 + .001 Northwest 26 0.172 0.045 0.082 Zr- Nb .017 + .002 Co ND Avera e: 0.086 ND Zn ND 60C ND 140 Ba- 140 La .015 + .003 90S .002 + .0001 89S .003 + .0001 Perimeter Rogersville, 26 141 yl44 Ce AL 0.171 0.037 0.080 .024 + .004 51 ND Athens, AL 26 0.'99 , 0.046 0.087 131I .001 + .0005 103>106 +

Ru .008 .005 0.042 0.085 134C Decatur, AL 26 0. 170 ND 137C .003 + . 002 Courtland, AL 26 0.184 0.042 0.085 "Zr-"Nb .017 + . 002 saC ND Avera e: 0.084 ND 65 Zn ND Co ND 140L .016 + .003 "Sr .001 ~ .0001 Sr ND

  • Sensitivity 0. 004 ND Not detectable

10 Table 2 (Continued)

Specific Radionuclides in No. of Nonvolatile Beta* Composite Samples Location ~Sam lea Max. Mie. ~Av (Avera e)

Remote 26 141y144 Ce +

Muscle Shoals, AL 0.132 0.040 0.076 .016 .005 "Cr ND Lawrenceburg, TN 26 0.175 0.052 0.091 1 31'03~ ND 106R .012 + .005 13 Fayetteville, TN 26 0.161 0.054 0.093 C ND 137C .003 + .002 Cullman, AL 26 0.156 0.049 0.088 95Zr-95'b .017 + .002 58(, ND Avera e: 0. 087 ND 65Z .002 + .0003 60( ND 140B 140

.015 + .003 "Sr .001 + .0001 89S .003'+ .0001

~Sensitivity 0.004 ND Not detectable

Table 3 MAXIMUM PERMISSIBLE CONCENTRATIONS FOR NONOCCUPATIONAL EXPOSURE In Mater In Air

~CS/1 pcs/m Alpha 30 Nonvolatile beta 3,000 100 Tritium 3,000,000 200,000 1 37(. 200000 , 500 10 3 $ 106Ru 10,000 200 I 44( 10,000 200 Zr- Nb 60$ 000 11000 140B 140L 20,000 1,000 131Z 300 100 65Z 100,000 2,000 Mn 100,000 1,000 Co 30,000 300 89Sr 3,000 300 "Sr 300 30 2,000,000 80,000 1 34(. ',000 400 ssG 90,000 2,000

12 Table 4 RAIN pC1/liter Specific No. of Nonvolatile Beta* Radionuclides Location ~Sam lee Max. Mim. ~Av (Avera e)

Local 141@144 1.6'+ 0.6 Northwest 7.33 3.69 5.41 Ce "Cr ND LM-4BF 14.10 2.20 6.04 , 131I ND 103p106 Ru 0.9 + 0.4 North 16. 0'4 2. 92 7. 11 1 34C 0.4 + 0.2 137C 0.7 + 0.2 Northeast 8.84 2.68 5.20 Zr- Nb 0.6 + 0.3 58co 0.2 + O.l Avera e: 5.94 Mn 0.6 + 0.3 Zn 0.9 + 0.6 60 3.5 + 0.3-140B 140L 3.3 + 0.3 "Sr 0.6 + O.l Sr 1.3 + 0.1 3H** ND Perimeter Rogersville, AL 7.33 2. 92 4.54 141~144C 0.6 + 0.4 "Cr 31I ND Athens, AL 6. 42 2.48 4;63 1 ND 103>106 Ru ND Decatur, AL 6.18 ND 3.57 0.5 + 0.2 137C 0.5 + 0.2 Courtland, AL 11.19 2.14 5.72 95Z 95Nb 1.2 + 0.3 58 co 0.1 + 0.1 Avera e: 4.62 0.5 + 0.3 65Z 0.9 + 0.4 Co 4.0 + 0.4 140B 140L 3.6 + 0.5 90S 0.6 + 0.1 89S 1.2 + 0.1 H ND

  • Sensitivity 1.6
    • Sensitivity 400 ND Not detectable

13 Table 4 (Continued)

Specific No. of Nonvolatile Beta* Radionuclides Location ~Sam les Max.. Mia. ~Av (Avera e Remote 141~ 144 +

Muscle Shoals, AL 7.69 3.93 6.11 51 1.7 0.8 ND Lawrenceburg, TN 12.23 4.55 6.84 13P, ND 103~ 106 Ru ND 34C 0.4 + 0.2 Fayetteville, TN 8.01 3.00 4.95 1 137C 0.9 + 0.4 95Z 95 1.4 + 0.4 Cullman, AL 6 8.90 3.77 5.94 1

Co ND Avera e: 5.96 0.8 + 0.5 65Z 2.5 + 0.7 60Co 4.1 + 0.4 140B )40L 4.1 + 0.3 "Sr 0.6 + 0.1 09S 1.2 + 0.1 3 HA*

ND

  • Sensitivity 1.6
    • Sensitivity 400 ND - Not detectable

14 Table 5 TOTAL FALLOUT DEPOSITED mCi/kilometer No. of Nonvolatile Beta*

Location ~Sam lee Max. Min. ~Av .

Local Northwest 0.86 0.30 0.58 LM-4BF 1. 00 0.32 0.59 North 0.74 0.26 0.47 Northeast 0.83 0.28 0.57 Avera e: 0.55 Perimeter Rogersville, AL 1.09 0.23 0.58 Athens,'L 1.08 0.33 0.65 Decatur, AL 0. 91 0. 30 0.54 Courtland, AL 1.01 0.26 0.64 Avera e: 0.60 Remote Muscle Shoals, AL 1.17 0.35 0.63 Lawrenceburg, TN 0. 89 0.22 0.54 Feyetteville, TN 0.60 0.20 0.38 Cullman, AL 0.86 0.28 0.54 Avera e: 0.52

  • Sensitivity 0.01

Table 6 CHARCOAL FILTERS Ci/meter No. of Radioiodine*

Location ~Sam les Max. Min. ~AV ~

Local s

Northwest 26 0. 025 ND ND LM-4BF 26 ND ND North 26 0. 034 ND Northeast 26 0. 035 ND ND Avera e: ND Permieter Rogersville, AL, 26 0. 055 ND ND Athens; AL 26 0.030 ND ND Decatur, AL 26 ND Courtland, AL 26 0.048 ND ND Avera e: ND Remote Muscle Shoals, AL 26 ND ND ND Lawrenceburg, TN 26 0. 022 ND Fayetteville, TN 26 0. 022 ND ND Cullman, AL 26 0.042 ND ND Avera e: ND

  • Sensitivity 0.022 ND Not detectable

17 Terrestrial Monitorin Milk gamma-emitting isotopes and each farm are shown in table for 7.

radiostrontium.

So that any Milk is collected from five farms within a 10-mile radius of the plant, and from one 'farm approximately 20 miles from the plant (see figure 3). Raw milk is analyzed weekly for The relationship and monthly for average results for between fallout on pastureland and the presence of radionuclides in milk 'might be seen, pasturage is also sampled at the six farms.

A cow census was completed in June 1975. It was determined that there are no dairy farms nearer the plant than~ the nearest farm being sampled.

Ve etation I

In addition to the pasturage samples mentioned previously, vegetation samples are collected near each monitoring station in the network to determine possible plant uptake of radioactive materials

'from the soil or from foliar deposition. Table 8 gives the results obtained from the laboratory analyses. The data for the specific radionuclide analysis of vegetation are averaged for the four principal locations local, perimeter, remote-control, and farm.

Soil Soil samples are collected near 'each monitoring station in order that any'elationship between the amount of radioactive material found in vegetation and that in soil might be established. The averages for specific analyses are obtained in the same fashion as those'for vegetation. The results are given in table 9.

Water Domestic water supplies, obtained from surface streams and wells, are sampled and analyzed. Well water is obtained from seven private supplies within a 10-mile radius of the plant and from a number of wells on'he plant site. The results of analyses of well water are shown in table 10 and indicate that the maximum beta concen-tration is 0.36 percent MPC. Table ll indicates the results of samples beta concentration is taken from public water supplies. The maximum 0.14 percent 1PC. The specific isotopic concentrations reported are averages for each station for the semiannual period.

Environmental Gamma Radiation Levels Thermoluminescent dosimeters (TLD's) are placed at nine stations around the plant near the plant boundary and at the perimeter and remote air monitors to determine the gamma exposure rates at these locations. The TLD's are changed every 3 months.

The quarterly gamma radiation levels determined from these TLD's are given in table 12.

18 Figure 3 MILK MONITORING NETWORK Athens 7 2 f 5 nO Vl Q

Clement hgtet School good Roid Rood 2+

Ripley 3 lwtles Jones Crossroads noort ttoqts<

IQt rreR ogle Res see ferr't soui arum~

Pe od ez O.. Dairy Farms ALA 20

1. Farm 8
2. Farm H
3. Farm L 4 ~ Farm T
5. Farm Bi
6. Farm G (approximately 20 miles vest of the plant)

Scale: 1" 1.5 mile<

19 Poultr and Food Cro s Poultry and food crops raised in the vicini.ty of Browns Ferry Nuclear Plant are sampled as they become available during the growing season. During this sampling period samples of corn, peaches, green beans, tomatoes, potatoes, and chicken were collected and analyzed for gross beta, specific gamma-emitting radionuclides, Sr, and Sr. The results are given in table 13.

Table 7 MILK pCi/liter No. of 131I*

140B 140La 90Sr 89 Location ~sam les Max. Mie. ~Av . Cs K Raw Milk Farm G (Control) 9 (3) A* ND ND 3.4 1100.3 2.0 5.3 1.8 Farm B 25 (6) ND 6.6 1349.7 0.1 9.2 0.4 Farm Bi 25 (6) ND ND 2.5 1243.5 ND 5.5 1.3 Farm H 25 (6) ND ND ND 2,5 1275.3 0.2 4.4 1.2 Farm L 25 (6) ND ND 1.9 1263.8 ND 6.3 0.6 Farm T 25 (6) ND ND 5.2 1299.3 ND 5.2 0.8 Average: ('Farms B, Bi H L T) ND 3.7 1286.3 0.1 6.1 0.9

  • Chemical separation of iodine: Sensitivity for
    • >>1
    • I analysis weekly: (gamma scan and " Sr, Sr I0.5 pCi/1 at time of sample collection.

analyses monthly.)

ND Not detectable

21 Table 8

. VEGETATION Ci/ Dr Wei ht)

No. of Nonvolatile Specific Radionuclides Location ~Sam las ~A1 ha* Beta** Avera e) 1 s

Local Northwest 12.7 '4" '"4C Os9 + 0.1 51Cr 0.1 + O.l LM-4BF 11.0 131I 0.1 + 0.01 103tl06R 1.2 + 0.1 North 11.8 134CS ND 1 37Cs 0.2 + 0.04 Northeast 2 17.0 Zr- Nb 0.7 + 0.04 "Go 0.1 + 0.03 Avera e: ND 13.1 '4Mn ND 65Zn '-

ND 60C ND 140Ba-140La 0.4 + 0.03 90S 0.4 + 0.01 69S ND Perimeter Rogersville, AL 11.7 141/ 144Ce 0.7 + O.l "Cr ND Athens, AL 13.8 131I ND 103~106Ru 1.0 + O.l Decatur', AL 2 11.7 134Cs ND 137G 0.2 + 0.03 Courtland, AL 13s6 95Zr-95Nb 0.5 + 0.03 59G ND Avera e: 12.7 54M ND 65Z ND 60C ND 0.4 + 0.02 "Sr 0.5 +10.01 69S ND

+Sensitivity 0.1

    • Sensitivity 0.1 ND Not detectable

22 Table 8 (Continued)

No. of Nonvolatile Specific Radionuclides

,Location ~Sam les ~A1 ha* Beta** Avera e Remote and Control Muscle Shoals, AL 15.9 141~ 144Ce 1.3 +

51(r 0.1'.2

+ 0.1 Lawrenceburg, TN 8.6 1311. ND 103 106R 1.0 + O.l Fayetteville, TN 16.3 1 34CS ND 1 37Cs 0.3 + 0.04 Cullman, AL 20.3 95Zr-"Nb 1.0+ 0.04 "Co ND Farm G NA 22.1 ND 6 5Z ND Avera e: 16.6 Co ND 140Ba '40La 0.4 + 0.02 90S 0.9 + 0.01 89S 0.2 + 0.01 Nonvolatile Beta Farms Max. Min. ~AV e Bi 26.9 12.3 141~ 144C +

Farm 20. 2 0.9 0.1 51C 0.3 + 0.1 Farm B 19.2 12.2 15.4 131T ND 103 '06R +

1.0 0.1 Farm H 30.8 13.0 19.9 134C ND 137C 0.2 + 0.02 Farm L 25.8 9.9 17.7 95Z 95Nb 0.8 + 0.02 58C ND Farm T 28.1 12.7 18.0 ND 65Z ND Avera e: 18.2 "Co ND 140B 140L 0.4 + 0.03 90S- 0.5 + 0.01 89S 0.1 + 0.01

  • Sensitivity 0.1
  • +Sensitivity O.l ND Not detectable NA Not analyzed

23 Table 9 SOIL Ci/ m (Dr Wei ht)

No. of Specific Radionuclides Location ~Sam lee Nonvolatile Beta* (Avera e)

Local 141 144( 0.6 0.1 Northwest 5. 18 "cr 131I ND LM-4BF 5. 36 'ND 103>106R 0.4 + 0.1 North 4.58 1 34( ND 1 37CS 0.8 + O.l Northeast 4.48 95Z 95Nb 0.2 + 0.03 58 co ND Avera e: 4.90 '4Mn 0.1 + 0.05 Zn ND "co ND 140Ba 140La 0.2 4'.03 Perimeter 141>144 +

Rogersville, AL 5.04 Ce 0.5 0.1 "cr 131I ND Athens, AL 4.52 ND 103>106Ru 0.4 + 0.1 Decatur, AL 4.37 1340 ND 137cs 1.3 + 0.1 Courtland, AL 2.46 9SZ 95Nb 0.2 + 0.03 "co ND Avera e: 4.10 '4Mn ND SZn ND Co ND

'"'Ba-'"0La O.l + 0.02 Remote 4.60 141t144C e 0.6 + 0.1 Muscle Shoals, AL 5 ltm ND

.Lawrenceburg, TN 4.66 131I ND 103>106R 0.6 + 0.1 134C Fayetteville, TN 3.56 ND 137C 2.7 + O.l Cullman, AL 3.39 Zr- Nb 0.2 + 0.03 eco ND Avera e: 4.05 54Mn ND 65Z ND "co ND

'"'Ba-'4'La 0.1 + 0.02

+Sensitivity, 0.15 ND Not detectable

Table 10 PRIVATE WELL 'WATER Ci liter No. of honvolatile Beta<< 8 ecific Radionuclides Location ~Sa les Max. Min. ~Av Cr I Ru Cs Zr- ~ b Co 'Ba- "La Farm 0 2 ND ND hD ND ND 5. 5~A. 2 7. 1-1. 2 Control Farm 8 2.5 ND ND ND 0.4S0.3 ND 0. 78).6 ND 0+3i0.2 1.4i1.2 8.0+1.1 4 ZtO 7 Barn Bi 10.7 4.2 5.9 hD ND 0.9t0.5 0.6t0.6 ND 1.2%.3 ND 6.3%.7 4.25) ~ 5 Farm N 3.1 1.> 2.3 2.2t1.9 1.0t0.4 1.2+0.6 1.3N).8 ND 2.2+&.4 5.5%.7 4.0%.8 Farm L ND hD ND 0.6i0.4 ND 1.4i0.4 0.6t0 ~ 3 0.4N).4 ND 2.3&+ .2 6.38).7 2.0t0.6 Farm T 2.7 ND ND ND 0.5t0.4 1.8&,5 ND 1.2%.9 1.2tl.l 3.75).6 3.4A.5 Residence B. 4.6 ND ND 1.3+0.4 ND 4.0%.7 4.05).5 Residence BK l. 7 ND hD l. 7il. 4 ND 0.8t0.5 1.1N). 7 ND 1.5%.9 5.6%.7 2.7&.6 SFRP - 1 0.6+0.4 0.8&.6 ND 5.7%.8 4.14).7 BFNP - 2 2.9 ND ND ND 1.6+0.6 1 ~ 9D.3 6.5S7.8 5.14).7 SFNP - 3 2:7 ND 2.0-1.9 0.8i0.2 1.2%.6 ND 1.9~2..0 4.35).8 4.0%.6 SFRP -4 3.8 ND 2.1 1.8t1.2 08+05 12i06 0.9 S.4 1.1%.9 1.3%.3 5.9N).8 4.9%.6 BFBP -5 1.6-0.6 2 1+0 5 7.5+0.8 3.0 %.8 SFNP -6 5.9 ND 2.9 ND ND ND ND 0.7i0.4 ND 1. 99). 6 ND 2.8+0.6 1. 7io. 5 BFNP - 7 0.7 0.4 1.4i0. 7 1.2<<0.9 0.9i0.6 6.3s0.7 3.2i0.5 AveraEe: . ND 0.4g0.2 ND 0.2+O.l O.li0.1 0.5X0.1 0.5+0.1 0 7sO 1 ND 0.54. 1 1.0m7.2 5.6%.2 3.84.2

<<Sensitivity 1.6 ND - Not detectable

Table 11 PUBLIC MATER Ci liter No. of honvolatile betas ecific Radioauclides Location ~San les Cr Ru 's S Zr- hb Zn Bs- La Rs+

Vilson Dan 1.9 2.1-0.6 3 '-1.1 4.3'Q.9 Colbert SP ND ND ND 0.7'0.4 ND 4.0il.l 3.0 0.7 p'.8 p.4 Clenents School ND 3.1-0.9 ND ND ND 3.040.9 0.9 0.6 ND htheas 3.4 1.9 2.6 15407 0.3 0.1 2.5i0.3 ND Courtland 1.9 1.6 1.8 1.6f0.9 2 ~ 5-0. 9 2. 5t1. 2 ND ND 3.9a1.2 2.0i0.9 Tova Crceh ND 5. 6al. 0 3.5a0.9 Trlaity ND ND 6. lil.0 1.7'0.6 Decatur ND. 2. 2 2.6tl.7 0.8'-0.3 hD 0.5+0.4 ND ND 1.010.9 ND 3.0B1.6 5 0-1.2 3.4i0.6 Shef field (Yuscle 2.3 ND 1.8 2.3-1.3 0. 5-'0. 4 0. 8'-0. 6 0.7i0.5 ND 4.3ip 9 5.6-0.8 Shoals)

@heeler Dan 2.2 hD 1.7 0.6i0.2 1.00.5 ND 1.4f1.2 4.5iQ.7 2.9a0.5 408t55 Clmnploa Paper Co. 6 2.6 ND

=-

2.0 1.IN0.5 1.>0.5 ND 1,7f1,2 3,4ip,8 5 4iQ 7 416t55 MeiBhted hvera e: ND 0.8t0.2 0.1i0.1 0.2-0.1 0.5+0.1 0.7-0.2 Q.lsp.l 0.2ip.l 1.2i0.2 4.2iQ.3 3,4 tQ sSensltlvlty 1.6 a*Sensitivity 400 hD - Not detectable

26 Table,'2 ENVIRONMENTAL GAMMA RADIATION LEVELS Environmental Gamma uarter Location'n-Site I ~/

Radiation Levels January-March, 1975 (9)*

Maximum 0.018 39.9 Minimum 0.012 26.3 Average** 0.015+0.005 31.8+10.0 Off-Site (8)

Maximum 0.015 31.8 Minimum 0.010 21.6 Average 0.012+0.003 26.4+7.4 April-June, 1975 On-Site (9)

Maximum 0.016 34.0 Minimum . 0.011 23.7 Average 0.013+0.003 28.4+7.0 Off-Site (8)

Maximum 0.015 33.1 Minimum 0.009 20.0 Average 0.012+0.004 26.2+8.4

  • Number of stations (three TLD's at each station)
    • Allaverages reported +2a

27, Table 13 POULTRY AND POOD CROPS Ci/K (wet wei ht Corn Green beans Plant Area Muscle Shoals Plant Area Muscle Shoals Gross beta* 876.4 1735.7 1481.8 700.5 Specific Radionuclides

'" " '44C ND ND ND "Cr ND 131Z ND ND ND 103~106Ru ND ND ND 134CS ND ND 1 37Cs 5. 5+3. 3 ND Zr- Nb ND ND ND 58C ND ND S4M ND Zn ND ND ND 60Co ND 11.5+3.8 9.9+3.6 ND K 1622.0+69.0 '1986.6+87.5 2211.1+91.1 1344.6+89.1 140 Ba- 140 7. 3+1. 2 5. 2+2. 5 6.9+1.9 "Sr ND 46.8+4.8 54.8+3.0 89S 4.6+2.3 8.4+6.0

  • Sensitivity 0.1 (pCi/g, dry weight)

ND Not detectable

28 Table 13 (Continued)

POULTRY AND FOOD CROPS Ci/K (wet wei ht)

Peaches Potatoes Plant Area Muscle Shoals Plant Area - Muscle Shoals Gross beta* 532.0 923.3 1525.4 516.8 Specific Radionuclides 141 144C ND ND ND ND 51(r ND ND 1 31Z ND ND ND 103> 106R ND ND ND 134C 5. 3+1. 9 ND ND ND 1 37C ND Zr- Nb 5 8(.

'"Mn ND ND 6 sZn ND ND 60C ND 4. 5+3. 8 7. 9"-5. 0 1511. 7%3. 3 1106. 1"-90. 8 2406. 6 "-112. 8 2493. 3 "-111. 1

'4'aa- '4'La 4. 0@. 1 1. 8"-1. 3 1.5-1.4 ND "Sx 15. 1+M.6 12 . 3 "-3. 1 5.6"-1. 9 3. 9+-1. 3 89Sr ND ND 5.2+2.6

  • Sensitivity O.l (pC5./g, dry weight)

ND - Not detectable

29 Table 13 (Continued)

POULTRY AND FOOD CROPS Ci/K (wet wei ht) Ci/ (dr wei ht)

Tomatoes Chicken Muscle Shoals Plant Area Muscle Shoals Gross beta* 769.9 3.35 3.33 Specific Radionuclides 141pl44 Ce ND S1C 0. 2+0. 1 1311 ND 103a106R ND 0. 2+0. 1 134CS ND 1 37C ND ND ND 36Zr-36Nb ND SBC ND ND

'4Mn ND ND 6SZ ND ND "Co ND ND 4

K 1380.9+104.5 5.50+0.70 6. 4+0. 4 140~ 140L ND ND

"'Sr 9. 9+1. 4 ND ND 89S ND ND

  • Sensitivity 0.1 (pCi/g, dry weight)

ND Not detectable

Reservoir Monitorin quarterly along seven cross sections in Samples are Wheeler Reservoir collected at Tennessee River miles 277.98, 283.94, 288.78, 291.76, 293.70, 295.87, and307.52 as detailed in table 14. Samples collected for radiological analysis include plankton from three of these cross sections and bottom fauna and sediment from four cross sections. The locations of these cross sections are shown on the accompanying map (figure 4) and conform to sediment ranges established and surveyed by the Hydraulic Data Services Branch, TVA. Station 307.52 is located 13.5 miles upstream from the plant diffuser outfall and was selected as a control station.

Samples of water, net plankton, sediment, Asiatic clams, and two species of fish collected quarterly (plankton in only two quarters) are analyzed for radioactivity. Gamma and gross beta activity are determined in water (dissolved and total activity), net plankton, sediment, shells and flesh of clams, flesh of a commercial and a game fish species and also in the whole body of the commercial species. The Sr and Sr contents are determined in all samples where sufficient quantities are available. The activity of 12 gamma-emitting radionuclides is determined with a multichannel gamma spectrometer. The Sr and Sr contents are determined by appropriate radiochemical techniques.

Water From five of the seven cross sections a total of 15 water samples is collected quarterly for determination of total and,dis-solved radioactivity. The locations and depths for sampling are shown

.in table 14. Results are displayed in tables 15 and 16. Samples from all horizontal locations and depths at each river mile cross section are composited quarterly for tritium analysis. Water samples are also collected monthly at the point of plant discharge to the Tennessee River and at a point on the Elk River. These samples are a part of the quality control program. From the data in table 17, the maximum

't average beta concentration is 0.20 percent of MPC for samples collected these two locations.

Fish Radiological monitoring for fish is accomplished by analysis of composite samples of adult fish taken from each of three contiguous reservoirs Wilson, Wheeler, and Guntersville. No permanent sampling stations have been established within each reservoir; this reflects the movement of fish species within reservoirs as determined by TVA data from the Browns Ferry Nuclear Plant preoperational monitoring program.

Two species, white crappie and smallmouth buffalo, are collected repre-senting both commercial and game species. Sufficient fish are collected in each reservoir to yield 250 to 300 grams oven-dry weight for analytical purposes. All samples are collected quarterly and analyzed for gamma,

32 gross alpha, gross beta activity, 89 Sr, and 90 Sr. The composite samples contain approximately the same quantity of flesh from each fish. For each composite a subsample of material is drawn for counting. Results are given in table 18.

Plankton As indicated in table 14, net plankton (all phytoplankton and zooplankton caught with a 100 p mesh net) is collected for radio-logical analyses at each of three stations by vertical tows with a Q-meter net. At least 50 grams (wet weight) of material is necessary for analytical accuracy. Collection of this amount will probably be practical only during the period April to September (spring and summer quarters) because of seasonal variability in plankton abundance.

Samples are analyzed for gross beta activity and, when quantities are sufficient, for gamma activity and Sr and Sr content. Results are shown in table 19.

Sediment Sediment samples are collected from Ponar dredge hauls made for bottom fauna. Gamma and gross beta radioactivity and 89 Sr and Sr content are determined quarterly in composite samples col-lected from each of four stations. Locations of these stations are shown in table 14. Results are shown in table 20.

Bottom Fauna The flesh and shells of Asiatic clams collected from the cross sections at four stations (table 14) are analyzed for gamma and gross beta activity at quarterly intervals. The 89 Sr and 90 Sr contents are determined on the shells, and on the flesh when suf-ficient amounts were 'available. A 50-gram (wet weight) sample provides sufficient activity for counting. Results are given in table 21.

Table 14 SAHPLING SCHEDULE RESERVOXR MONTTORlNG Biolo ical Sam les Water Sam les Zooplankton, Distance From Tennessee River Chlorophyll, Benthic Left Bank Depths (Mile) Fauna* Sediment* Fish** Feet Percent (Meters) 277.98 2 2 283.94 3600 40 1 7100 78 1, 10 288.78 291.76 5000 60 1 7000 84 1, 5 293.70 6800 65 1 9200 88 , 1, 5 295.87 "4000 44 1, 5 7500 82 1 307.52 1800 24 1, 5 2800 37 1

  • Replicate samples
    • Gillnet and/or electroshocker will be used for collection. Samples of fish are collected from Guntersville, Wheeler, and Wilson Reservoirs.

Figure 4 R ESERVOI R MONITORING NETV/ORK Elk River WHEELER DAM mile 274.90 mile 277.98 Rogersville 0

mile 29l.76 Athens B.F. NUCLEAR PLANT mile 295.87 ile 28878 mile H6.94 0

Cour tland mile 295.70 Decatur mile 307.52 Scale of Miles 0

Table 15 RIVER MATER Dissolved Activit Ci liter TN Depth River No. of Boric. in Cross Nonvolatile ' 8 ecific Radionuclides Nile Sanoles Locations Neters ~AI ha*+ Betaes* Ce Cr I Ru Cs Cs Zr- Nb "Co Hn Zn Co Ba- La Sr 4 Sr 283.94 40 1 ND 2 ' bD ND 3.6 1.1 4.6 0.9 0.9 0.4

-283.94 78 1 ND 2.5 ND ND 1.4 0.4 1.5i0.6 0.6 0.4 283.94 78 10 ND 3.3 ND ND" 4.551.2 ND ND 2.150.7 ND 0.8-0.5 291. 76 2 60 2.2 ND 2. 751. 3. 8 f0.8 ND 1 0.4 0.3 291. 76 2.2 ND 1.5t0.6 ND ND ND ND ND ND ND 2.1i0.6 0.5t0.4 291.76 84 2.4 ND 2.540.7 1.7+0.6 ND ND 0.8+0.3 293.70 65 1.8 6.1+1.0 1.3%.7 0.7i0.4 ND 293.70 88 3. 9i2. 0 ND ND 0.7+0.4 I,.5+0.8 3.10.8 1.4+0.6 ND ND 0.8+0.4 0.6i0.3 293.70 88 2.3 ND hD 1.7i0.6 ND' ND 5.0&+ .2 3.2'0.9 0.4+0.3 iND 295.87 I ND 2.8 ND 1.4i0 4 ND 1.7i0.5 2.4i0.7 0.4i0.3 0.8-'0.4 295.87 44 2.8 5 ND 4.0tl.2 3.5 0.9 1 li04 295.87 82 I ND 1.9 ND ND 2 'i0.8 1.1i0.7 ND 0 5-'0.4 307.52 2 24 I ND 2.4 3. 9i1. 4 ND l,li0.9 ND 4. 7 el. I 2. 7i0.8 ND 0.7i0.5 307.52 2 24 5 ND 4,1 . ND ND ND 1.4+0.6 ND 3. 1 i0. 6 2. 1%. 5 ND 0. 9+0. 6 307.52 I 37 I ND 2.1 ND ND ND ND ND ND 5.0%.9 2.1i0.6 0.5i0 3 0 7i0.5 Avera e: 2.3 0.580.2 0.%0.1 ND ND ND 3.5i0.2 2.4+0.2 0.4.1 0.4'.l

  • Percent of distance across asSensitivity 1.2 river from left bank looking dovnstrean as*Sensitivity 1.6 ND - Not detectable

Table 16 RIVER WATER Total Activit Ci/liter Tn R'ver Nile No.

~Sa=

of Boric.

Depth in les Locations Haters Cross Alohaa*

Nonvolatile Betaeea Ce Cr I 'u Cs S ecific Cs Radionuclides Zr- Hb Co Mn Zn Co Ba- La Sr He*a*

283.94 2, 40 2.8 hD ND hD ND ND 2.0-0.9 5 3fl 4 3 8 0 9 1 4t0 4 0 7a0 4 ND 283.94 2.6 HD 4.0-'1.0 . 4.5+1.0 1.0+0.5 1.6f0.7 2 78 1 ND ND ND ND 2.0 0.8 HD 283.94 2 78 10 3.1 ND ND ND 1.3t0.9 ND 1.8+1.4 HD 4. Iil.2 4. 0-1. 1 0. 6-0. 4 0. 8-0. 3 291.76 60 1 ND 4.0 ND hD ND hD ND 2.6t0.3 HD ND 4.6+15 31+10 08'03 05+02 ND 291.76 1 ND 3.4 3.2t2.0 ND hD ND HD 1.6+0.9 O.gx0.6 ND 6.5x1.4 4.6+1.2 0.6+0.4 0.5-0.3 291.76 84 5 . ND l. 7 3.4 t3.1 ND ND ND ND ND 1.6tl.l ND 2.3xl.l 5.3+1.0 0.7t0.5 0.6f0.5 293.70 65 1 ND 22 ND ND HD 3.6t3.0 ND ND ND HD hD 5. 9tl. 3 2. 5il. 2 0. 8+0. 3 HD HD 293.70 88 2.0 ND HD hD ND ND ND 2.0+1.0 4.8t0.9 ND 0.7-0.4 293.70 38 2. 2 5. 213. 2 ND ND ND ND -

ND 7. lil.6 3. 8+1. 1 0. 9+0. 4 ND 295.87 44 I ND 3.5 ND ND ND 0, 910. 8 ND 0.9i0. 5 ND HD ND 6.1tl. 6 4. Oil. 3 0. 8tO. 4 0.5i0. 4 HD ND hD ND 6.1+A.l 2.6f0.8 ND 0.7t0.4 295.87 44 5 3.5 4. le 3. 0 ND ND ND hD 95.87 82 1 = ND 2.9 ND ND ND 1.3t0,4 ND ND 1.8tl.l 2.9'.4 5.6'.2 2.7al.l 0.6'.4 0.9 0.5 307.52 24 1 ND 2.6 ND ND ND ND l.lt0.9 0.7i0.5 ND 6. 1%. 1 3. 4K. 9 1. 3+%. 4 ND hD 307.52 24 ND 2.3 ND ND 1.2'.l 2.2%.8 0.5'.3 0.6%.4 307.52 37 1 ND 2.2 ND 5.4ti.3 3.3'.9 ND 0.8rO ~ 5 Avera e: ND 2.7 1.1+0.4 ND ND 0.2e0.2 0.2t0.1 0.5+0.1 0 5fO 1 to. 0.7a .1 0.6 0.1 ND

  • Percent of distance across river fron left bank looting dovnstreaa e~gensitivity 1.2 ee ~ Scnaitivlty 1.6

~ "a~Senstttvity 400 HD - Hut dctcctnblo

37 Table 17 RIVER WATER pC1/liter No. of Alpha* Nonvolatile Beta+* Specific Radionuclides Location ~Sam les ~(Av .) Max. Min. ~Av . Avera e Browns Perry 6.1 2.1 3;3 141'44( ND at discharge 51Cr ND location 131I 0.7+0.6 103'06R ND 1 34C 1.1+0.7 .

137G 1.0+0.6 95Zr-"Nb ND Co ND ND Zn 2.8+1.4 60( 4.4+0.9 140B 1 '0L 5.4+1.2 90Sr 0.4+0.2 "Sr 0.8+0.2 3H*A* ND Elk River 5.3 2.2 2.9 '4'44C ND "Cr ND 131I ND 103> 106R ND.

1 34CS 1.2+0.4 137C 0.9+0.4 95Zr-95Nb ND Co 0.6+0.5 ND 65Z 3.4+1.2 60C 3.8+0.6 140B 140L 5.3+0.6 "Sr 0.4+0.2 09Sr 0.6+0.3 3H*A* ND Avera e: Avera e: 3.1

  • Sensitivity 1.2
    • Sensitivity 1.6
      • Sensitivity 400 ND Not detectable

Table 18 FISH Ci D Hei ht

.Location e of Fis'h No.

~Sa of les Cross

~A1 ha*

Cross Beta** Ce v Cr I 'u S ecific Cs Radionuclide Cs v Zr- Hb Co Yn Zn Co 'Ba- La Sr Sr Cuntersville Sealluouth Buffalo 5.30 ND 0.1-0.02 ND ND ND HD ND ND 0. 2-0. 03 (I'hole)

Snallnouth Buffalo 2 ND 4.52 0.310.1 ND HD . ND 0.2t0.04 (Flesh)

White Crappie 5.50 0. 1-0. 06 ND ND ND 0.4a0.04 (Flesh)

'heeler Smlluouth Buffalo 2 HD 5.14 0.4+0.07 ND ND 0.1+0.02 ND ND ND ND 'iD VD (Rhole)

Suallnouth Buf falo 2 HD 4.47 O.li0.06 ND HD 0.1-0.03 ND ND ND ND hD (Flesh) ate Crappie 2 ND 5.88 'D 0.3t0.1 ND ND 0.3i0.05 ND ND ND ND ND ND ND (Flesh) wilson Snallnouth Buffalo 2 ND 3.78 0. 1RO. 06 ND ND 0.2-0.02 0.2'0.02 ND (Hhole)

Suallnouth Buffalo 1 ND 3.79 ND 0. 1-0. 02 ND 0.2-0.05 (Flesh)

Mhite Crappie 2 ND 5.97 0.2i0.09 HD ND 0.4>0.03 (Flesh)

<<Sensitivity 0.02 a*Sensitivity 0.03 BD - Not derectable

39 Table 19 PLANKTON Ci/ D Wei ht Tennessee No. of Gross Gross Specific River Mile ~Sam les ~A1 ha* Beta+* Radionuclides+**

277.98 1.08 19.43 291.76 1.30 13.36 307.52 2.14 18.34 Avera e: 1.51 17.04

  • Sensitivity 0.03
    • Sensitivity 0.04
      • Sample size not sufficient to perform specific isotopic analysis

40 Table 20 SEDIMENT Ci/ m Dr Wei ht TN River Mile 277.98 288.78 293.70 307.52 ~Aveva e No. of Samples 4 4 Gross Alpha* 0.94 0.81 0.54 Oe92 0.80 Nonvolatile Beta+* '.07 8.48 5.47 7.47 7.37 Specific Radionuclides 1419144 C 1.0+0.3 0.4Ã.2 ND 0.4+O.l 51C 131I 1039106Ru 0. 4+0. 2 1 e 1 iO. 2 0. 3+0. 1 0. 5+0. 2 0. 6+0.1 134Cs 137C 6.4+0.2 3.6+0.2 2.1+O.l 0.6+O.l 3.2+0.1 Zr- Nb 0.2+O.l 0.8+0.1 0.2+0.04 0.2+0.06 0.4+0.04 50C ND ND 54Mn O.1+0.1 0.2+0.1 0.2+0.05 0.2+O.l 0.2+0.05 "Zn 60C 140Ba 140La 0.2+0.1 0.3+0.06 0.2+0.03 0.3+0.05 0.2+0.03 30S 0.2+0.05 0.2+0.05 0.2+0.06 0.2+0.05 0.2+0.03 "Sr ND 0.2+0.1 0.1+0.06 0.1+0.07 0.1+0.03 24Sensitivity O.ll

    • Sensitivity 0.15 ND Not detectable

41 Table 21 CLAM Ci/ Dr Wei ht Clam Shell TN River Mile 277.98 288.78 293.70 307.52 ~Avera e No. of Samples Gross Alpha* 0.11 0.24 0.09 Nonvolatile Beta** 2.30 2.36 2.69 3.01 -2.59 Specific Radionuclides

'""'44C 0.5+0.07 0.5+0.05 0.5+0.08 0.5+0.1 0.5+0.04 510 131Z 103>106R O.1+0.02 0.1+0.07 134C 137C ND 95Z 95Nb "Co 65Z ND "Co ND ND 140B 140L ND 0.1+0.02 "Sr 3.3+0.2 4.2+0.3 5.6+0.2 4.9+0.3 4.5+0.1 Sr 0.3+0.3 0. 6+0. 2 0.3+0.2 0.3+0.1

  • Sensitivity O.ll
  • +Sensitivity 0.14 ND - Not detectable

42 Table 21 (Continued)

CLAM Ci/ Dr Wei ht Clam Flesh TN River Mile 277.98 288.78 293.70 307. 52 ~Avera e No. of Samples Gross Alpha* ND ND ND Nonvolatile Beta** l. 73 1. 19 1.28 0.87 1.27 Specific Radionuclides 14 1 > 144( 2.4+0.4 l. 3+0.6 2. (L0.5 2.2+0.5 2.P 0.3 51 Cr 1. 8+-1. 0 3.2+0.9 2.9+0.9 '0.5+0.4 2.1+0.4 1 3 1I 0. 2+0. 05 0.3+0.1 0.6+0.1 0.5+0.1 0. 4+0. 05 103~ 106R 0. 4+0. 3 0.4+0.2 0.7+0.4 ND Q. 4+0. 1; 134C 0.2+0.1 0.1+0.05 O.1+0.03 137 0.7+0.2 0.6+0.3 0.6+0.1 Cs 0.7-+0.2 0.3+0.1 95 Zr- 95 Nb ND 0.2+0.1 ND ND 58 Co ND ND ND 54 Mn ND ND ND 65 Zn 0. 4-+0. 2 ND ND 0. 1+0. 05 60Co 0.5+0.1 0. 3+0. 1 0. 3+0. 0. 2+0. 05 0.3+0.05 1'.

140 Ba- 140 La 0. 6+0. 1 0.5+0.1 6+0. 1 0.5+0.1 0. 6+0. 05 90S 0.2+0.03 0. 1+0. 02 NA 0. 2+0. 02 89 -NA Sr NA

  • Sensitivity 0.03
    • Sensitivity 0.04 NA Not analyzed ND Not detectable

ualit 'Control A quality control program has been established with the Alabama Department of Public Health Environmental Health Administra-tion Laboratory and the Eastern Environmental Radiation Facility, Environmental Protection Agency, Montgomery, Alabama. Samples of air, water, milk, and vegetation collected around the BFNP are forwarded to these laboratories for analysis; and results are exchanged for comparison.

Data Anal sis Data measured at each indicator and control station were averaged for the 6-month reporting period. In order to describe the distribution of control station data, a=mean, standard deviation, and 3-sigma value were calculated. We can expect, with 99 percent con-fidence, that background concentrations would be distributed within these limits. This provides us the basis for comparing control and indicator data. If- the indicator data fall within the limits defined for control data, we can say, with 99 percent confidence, that the indicator data were not significantly affected by the nuclear plant.

If the data do not fall within the limits, we will perform further analyses to determine if the difference is attributable to the nuclear plant.

Conclusions A vast majority of the indicator station data were found to be within the distribution defined by the control station data. The Alpha-M least squares computer program identified concentrations slightly exceeding the limits of the control station data for a small number of radionuclides in samples from indicator stations. Many of these values may be discounted because the error reported by the Alpha-M program was greater than the calculated concentration. The remaining isolated elevated concentrations may be the result of fallout, computer program artifacts, or analytical errors. The same type of isolated high values occurred in the control station data and may be attributed to the same sources.

Exposures were measured with thermoluminescent dosimeters (TLD) at nine indicator stations near the site boundary and at eight control stations remote from the plant. Som'e anomalies were observed in the TLD exposure measurements at both indicator and control stations. A student's "t" test performed on the data indicated that, at the 99% confidence level, the radiation levels found at the onsite stations are not statistically different from the levels found at the offsite stations.

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