ML18283B696

Environmental Radioactivity Levels, Brown Ferry Nuclear Plant, January-June 1975

ML18283B696
Person / Time
Site:	Browns Ferry
Issue date:	12/31/1975
From:	Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation
References
RH-75-4-BF2
Download: ML18283B696 (44)

Text

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

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CONTENTS introduction

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Figure 1 Tennessee Valley Region Table 1

Environmental Radioactivity Sampling Schedule Figure 2 Atmospheric and Terrestrial Monitoring Network.

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5 Atmospheric Monitoring.

Table 2

Table 3

Table 4

Table 5

Table 6

Radioactivity in Air.

Maximum Permissible Concentrationq Nonoccupational Exposure

- Rain

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Total Fallout Deposited Charcoal Filters for

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11 12 14 15 Terrestrial Monitoring.

17 Figure 3

Table 7

Table 8

Table 9

Table 10 Table ll Table 12 Table 13 Milk Monitoring Network Milk

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- Vegetation Soil

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Private Well Water Public Water Environmental Gamma Radiation Levels Poultry and Food Crops

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18 20 21 23 24 25 26 27 Reservoir Monitoring 31.

Table 14 Figure 4 Table 15 Table 16 Table 17 Table 18 Table 19 Table 20 Table 21 Sampling Schedule Reservoir Moni Reservoir Monitoring Network River Water, Dissolved Activity.

River Water, Total Activity River Water 0

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Plankton Sediment 0

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33 34 35 36 37 38 39 40 41 Quality Control Data Analysis Conclusions 43 43 43

ENVIRONMENTAL RADIOACTIVITYLEVELS 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'.

LOIIISVE.LE N

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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 ENVIRONMENTAL RADIOACTIVITYSAMPI.INC SCHEDULE Air Charcoal Rain-Heavy Particle River Well Public Aquatic'Life Ptatl l

clc Pelt Milt c 'll 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 Site NW-4 Farm B

Farm Bi Farm H Fata T Farm L Farm G (Control)

Wheeler Dam Elk River W

W M

M Q

W W

M M

Q Q

M W

M W

M W

M W

M W

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 FAYETTEVILLEQP' RM-38F WILSON FLORENCE PM-IBF WHEELER RPGfRSVIL OAM ATHENS PM-28F EFFIEL MUSCLE SHOALS RM-IBF LEIGHTON TUSCUMBIA COURTLANO PM-4 F

g RUSSELLVILLE BROWNS FERRY NUCLEAR PL NT DECAT R PM-3BF0 IO MILES HARTSELLE HUNTSVILLE GUNT SVIL DAM 25 S

HALEYVILLE RM"58F CULLMAN 45 MILES RAINWATER SOIL VEGETATION Q-ENVIRONMENTAL MONITORING STATION NOTE: THE FOLLOWING SAMPLES ARE COLLECTED FROM EACH STATION:

AIR PARTICULATES RADIOIODINE HEAVY PARTjCLE FALLOUT

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.

'harcoal filters are collected and analyzed for radioiodine.

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.

i

Table 2

RADIOACTIVITYIN AIR

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Location Local

.No. of

~Sam les Max..

Mia.

'Av Nonvolatile Beta*

Specific Radionuclides in Composite Samples (Avera e)

Northwest LM-4BF North Northwest 26 26 26 26

0. 186

0. 173 0.197 0.172 Avera e:

0.047 0.086 0.054 0.092, 0.049 0.086 0.045 0.082 0.086 14lp144 Ce 51 131I 1031106 Ru 134C 137 Cs Zr-Nb Co Zn 60C 140 140 Ba-La 90S 89S

.021

+

ND ND

.013

+

ND

.003

+

.017

+

ND ND ND ND

.015

+

.002

+

.003

+

.004

.006

.001

.002

.003

.0001

.0001 Perimeter Rogersville, 26 AL

Athens, AL 26

Decatur, AL 26 Courtland, AL 26 0.'99

0. 170 0.184 Avera e:

, 0.046 0.042 0.042 0.087 0.085 0.085 0.084 0.171 0.037 0.080 141 yl44 Ce 51 131I 103>106 Ru 134C 137C "Zr-"Nb saC Zn 65 Co 140L "Sr Sr

.024

+

ND

.001

+

.008

+

ND

.003

+

.017

+

ND ND ND ND

.016 +

.001 ~

ND

.004

.0005

.005

. 002

. 002

.003

.0001

• Sensitivity 0. 004 ND Not detectable

10 Table 2 (Continued)

Location Remote No. of

~Sam lea Max.

Nonvolatile Beta*

Mie.

~Av Specific Radionuclides in Composite Samples (Avera e)

Muscle Shoals, AL Lawrenceburg, TN Fayetteville, TN

Cullman, AL 26 26 26 26 Avera e:

0. 087 0.132 0.040 0.076 0.175 0.052 0.091 0.161 0.054 0.093 0.156 0.049 0.088 141y144 Ce "Cr 1

31'03~ 106R 13 C

137C 95Zr-95'b 58(,

65Z 60(

140B 140 "Sr 89S

.016

+

ND ND

.012

+

ND

.003

+

.017

+

ND ND

.002

+

ND

.015

+

.001

+

.003'+

.005

.005

.002

.002

.0003

.003

.0001

.0001

~Sensitivity 0.004 ND Not detectable

Table 3

MAXIMUM PERMISSIBLE CONCENTRATIONS FOR NONOCCUPATIONAL EXPOSURE Alpha Nonvolatile beta Tritium 1 37(.

10 3 $ 106Ru I 44(

Zr-Nb 140B 140L 131Z 65Z Mn Co 89Sr "Sr In Mater

~CS/1 30 3,000 3,000,000 200000 10,000 10,000 60$ 000 20,000 300 100,000 100,000 30,000 3,000 300 In Air pcs/m 100 200,000

, 500 200 200 11000 1,000 100 2,000 1,000 300 300 30 1 34(.

ssG 2,000,000

',000 90,000 80,000 400 2,000

12 Table 4

RAIN Location pC1/liter No. of Nonvolatile Beta*

~Sam lee Max.

Mim.

~Av Specific Radionuclides (Avera e)

Local Northwest LM-4BF North Northeast 7.33 3.69

16. 0'4

2. 92 8.84 2.68 Avera e:

14.10 2.20 5.41 6.04

7. 11 5.20 5.94 141@144 Ce "Cr

, 131I 103p106 Ru 1 34C 137C Zr-Nb 58co Mn Zn 60 140B 140L "Sr Sr 3H**

1.6'+ 0.6 ND ND 0.9

+ 0.4 0.4

+ 0.2 0.7 + 0.2 0.6

+ 0.3 0.2

+ O.l 0.6

+ 0.3 0.9

+ 0.6 3.5

+ 0.3-3.3

+ 0.3 0.6

+ O.l 1.3

+ 0.1 ND Perimeter Rogersville, AL

Athens, AL

Decatur, AL Courtland, AL 7.33

6. 42 6.18 11.19 Avera e:

2. 92 2.48 ND 2.14 4.54 4;63 3.57 5.72 4.62 141~144C "Cr 1 31I 103>106 Ru 137C 95Z 95Nb 5 8 co 65Z Co 140B 140L 90S 89S H

0.6

+ 0.4 ND ND ND 0.5

+ 0.2 0.5

+ 0.2 1.2

+ 0.3 0.1 + 0.1 0.5

+ 0.3 0.9 + 0.4 4.0 + 0.4 3.6 + 0.5 0.6

+ 0.1 1.2

+ 0.1 ND

• Sensitivity 1.6

• • Sensitivity 400 ND Not detectable

13 Table 4 (Continued)

Location No. of Nonvolatile Beta*

~Sam les Max.. Mia.

~Av Specific Radionuclides (Avera e Remote Muscle Shoals, AL Lawrenceburg, TN Fayetteville, TN

Cullman, AL 6

1 7.69 12.23 8.01 8.90 Avera e:

3.93 4.55 6.11 6.84 3.77 5.94 5.96 3.00 4.95 141~ 144 51

13P, 103~ 106 Ru 1 34C 137C 95Z 95 Co 65Z 60Co 140B

)40L "Sr 09S 3HA*

1.7

+ 0.8 ND ND ND 0.4

+ 0.2 0.9

+ 0.4 1.4

+ 0.4 ND 0.8

+ 0.5 2.5

+ 0.7 4.1

+ 0.4 4.1

+ 0.3 0.6

+ 0.1 1.2

+ 0.1 ND

• Sensitivity 1.6

• • Sensitivity 400 ND - Not detectable

14 Table 5

TOTAL FALLOUT DEPOSITED mCi/kilometer Location No. of

~Sam lee Max.

Min.

~Av.

Nonvolatile Beta*

Local Northwest LM-4BF North Northeast 0.86

1. 00 0.74 0.83 0.30 0.58 0.26 0.47 0.28 0.57 0.32 0.59 Avera e:

0.55 Perimeter Rogersville, AL Athens,'L

Decatur, AL Courtland, AL 1.09 1.08

0. 91 1.01 Avera e:

0.23 0.33

0. 30 0.26 0.58 0.65 0.54 0.64 0.60 Remote Muscle Shoals, AL Lawrenceburg, TN Feyetteville, TN

Cullman, AL 1.17

0. 89 0.60 0.86 Avera e:

0.35 0.63 0.22 0.54 0.28 0.54 0.52 0.20 0.38

• Sensitivity 0.01

Table 6

CHARCOAL FILTERS Ci/meter Location Local s

Northwest LM-4BF North Northeast No. of

~Sam les 26 26 26 26 Max.

0. 025 ND

0. 034

0. 035 Radioiodine*

Min.

ND ND

~AV

~

ND ND ND ND Avera e:

ND Permieter Rogersville, AL, Athens; AL

Decatur, AL Courtland, AL 26 26 26 26

0. 055 0.030 ND 0.048 ND ND ND ND ND ND Avera e:

ND Remote Muscle Shoals, AL Lawrenceburg, TN Fayetteville, TN

Cullman, AL 26 26 26 26 ND

0. 022

0. 022 0.042 ND ND ND ND ND ND ND

• Sensitivity 0.022 ND Not detectable Avera e:

ND

17 Terrestrial Monitorin Milk 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', and monthly for gamma-emitting isotopes and for radiostrontium.

The average results for each farm are shown in table 7.

So that any relationship 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 taken from public water supplies.

The maximum beta concentration is 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 5

7 2 f

nOVl Q

Clement School hgtet good Rood Ripley 2+

3 lwtles Roid rreR Res see souiPe od ogle

~ ferr't arum ttoqts< IQt Jones Crossroads noort ez O.. Dairy Farms 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)

ALA 20 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 Location Raw Milk No. of 131I*

~sam les Max.

Mie.

~Av.

Cs K

140B 140La 90Sr 89 Farm G (Control)

Farm B

Farm Bi Farm H

Farm L Farm T 9 (3) A*

25 (6) 25 (6)

ND ND ND ND ND 25 (6)

ND ND ND 25 (6) 25 (6)

ND ND ND ND Average:

('Farms B,

Bi H

L T) ND 3.4 6.6 2.5 2,5 1.9 5.2 3.7 1100.3 1349.7 1243.5 1275.3 1263.8 1299.3 1286.3 2.0 0.1 ND 0.2 ND ND 0.1 5.3 9.2 5.5 4.4 6.3 5.2 6.1 1.8 0.4 1.3 1.2 0.6 0.8 0.9

• Chemical separation of iodine:

Sensitivity for I0.5 pCi/1 at time of sample collection.

I analysis weekly:

(gamma scan and

" Sr, Sr analyses monthly.)

• • >>1 ND Not detectable

21 Table 8

. VEGETATION Ci/

Dr Wei ht)

Location No. of

~Sam las

~A1 ha*

Nonvolatile Beta**

Specific Radionuclides Avera e) 1 s

Local Northwest LM-4BF North Northeast 2

Avera e:

ND 12.7 11.0 11.8 17.0 13.1

'4" '"4C 51Cr 131I 103tl06R 134CS 1 37Cs Zr-Nb "Go

'4Mn 65Zn 60C 140Ba-140La 90S 69S Os9

+ 0.1 0.1

+ O.l 0.1

+ 0.01 1.2

+ 0.1 ND 0.2

+ 0.04 0.7

+ 0.04 0.1

+ 0.03 ND

'- ND ND 0.4

+ 0.03 0.4

+ 0.01 ND Perimeter Rogersville, AL

Athens, AL Decatur',

AL Courtland, AL 2

Avera e:

11.7 13.8 11.7 13s6 12.7 141/ 144Ce "Cr 131I 103~106Ru 134Cs 137G 95Zr-95Nb 59G 54M 65Z 60C "Sr 69S 0.7

+ O.l ND ND 1.0

+ O.l ND 0.2 + 0.03 0.5 + 0.03 ND ND ND ND 0.4

+ 0.02 0.5 +10.01 ND

+Sensitivity 0.1

• • Sensitivity 0.1 ND Not detectable

22 Table 8 (Continued)

,Location No. of

~Sam les

~A1 ha*

Nonvolatile Beta**

Specific Radionuclides Avera e Remote and Control Muscle Shoals, AL Lawrenceburg, TN Fayetteville, TN

Cullman, AL Farm G

Avera e:

NA 15.9 8.6 16.3 20.3 22.1 16.6 141~ 144Ce 51(r 1311.

103 106R 1 34CS 1 37Cs 95Zr-"Nb "Co 6 5Z Co 140Ba

'40La 90S 89S 1.3

+

0.1'.2

+ 0.1 ND 1.0

+ O.l ND 0.3

+ 0.04 1.0+ 0.04 ND ND ND ND 0.4

+ 0.02 0.9

+ 0.01 0.2

+ 0.01 Nonvolatile Beta Farms Farm Bi Farm B

Farm H

Farm L Farm T Max.

26.9 19.2 30.8 25.8 28.1 Avera e:

Min.

12.3 12.2 13.0 9.9 12.7

~AV e

20. 2 15.4 19.9 17.7 18.0 18.2 141~ 144C 51C 131T 103 '06R 134C 137C 95Z 95Nb 58C 65Z "Co 140B 140L 90S-89S 0.9

+ 0.1 0.3

+ 0.1 ND 1.0

+ 0.1 ND 0.2

+ 0.02 0.8

+ 0.02 ND ND ND ND 0.4 + 0.03 0.5

+ 0.01 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)

Location No. of

~Sam lee Nonvolatile Beta*

Specific Radionuclides (Avera e)

Local Northwest LM-4BF North Northeast Avera e:

5. 18

5. 36 4.58 4.48 4.90 141 144(

"cr 131I 103>106R 1 34(

1 37CS 95Z 95Nb 5 8 co

'4Mn Zn "co 140Ba 140La 0.6 0.1 ND

'ND 0.4

+ 0.1 ND 0.8

+ O.l 0.2

+ 0.03 ND 0.1

+ 0.05 ND ND 0.2 4'.03 Perimeter Rogersville, AL

Athens, AL

Decatur, AL Courtland, AL 5.04 4.52 4.37 2.46 Avera e:

4.10 141>144 Ce "cr 131I 103>106Ru 1340 137cs 9SZ 95Nb "co

'4Mn SZn Co

'"'Ba-'"0La 0.5

+ 0.1 ND ND 0.4

+ 0.1 ND 1.3

+ 0.1 0.2

+ 0.03 ND ND ND ND O.l + 0.02 Remote Muscle Shoals, AL

.Lawrenceburg, TN Fayetteville, TN

Cullman, AL Avera e:

4.60 4.66 3.56 3.39 4.05 141t144C e 5 ltm 131I 103>106R 134C 137C Zr-Nb eco 54Mn 65Z "co

'"'Ba-'4'La 0.6

+ 0.1 ND ND 0.6

+ 0.1 ND 2.7

+ O.l 0.2 + 0.03 ND ND ND ND 0.1

+ 0.02

+Sensitivity, 0.15 ND Not detectable

Table 10 PRIVATE WELL 'WATER Ci liter Location Farm 0 Control No. of honvolatile Beta<<

~Sa les Max.

Min.

~Av 2

ND ND hD Cr I

Ru ND Cs 8 ecific Radionuclides Zr-

~ b ND Co

5. 5~A. 2

'Ba-

"La

7. 1-1. 2 Farm 8 Barn Bi Farm N

Farm L Farm T Residence B.

Residence BK SFRP - 1 BFNP - 2 SFNP - 3 SFRP - 4 BFBP - 5 SFNP - 6 BFNP - 7 2.5 ND ND ND 10.7 4.2 5.9 hD 3.1 1.>

2.3 2.2t1.9 ND hD ND 2.7 ND ND 4.6 ND ND l.7 ND hD l.7il.4 2.9 ND ND ND 2:7 ND 3.8 ND 2.1 1.8t1.2 5.9 ND 2.9 ND ND 0.4S0.3 1.0t0.4 0.6i0.4 ND 1.6-0.6 ND ND 0.9t0.5 ND 1.2+0.6 1.4i0.4 0.6t0 ~ 3 0.5t0.4 1.3+0.4 ND 08+05 12i06 2 1+0 5 ND 0.7i0.4 0.7 0.4 ND 0.8t0.5 0.6+0.4 1.6+0.6 2.0-1.9 0.8i0.2

0. 78).6 0.6t0.6 1.3N).8 0.4N).4 1.8&,5 1.1N). 7 0.8&.6 1.2%.6 0.9 S.4 1.4i0. 7 ND 0+3i0.2 1.4i1.2 8.0+1.1 4 ZtO 7 ND 1.2%.3 ND 6.3%.7 4.25) ~ 5 ND 2.2+&.4 5.5%.7 ND 2.3&+.2 6.38).7 4.0%.8 2.0t0.6 ND 4.0%.7 4.05).5 ND 1.5%.9 5.6%.7 2.7&.6 ND 5.7%.8 4.14).7 1 ~ 9D.3 6.5S7.8 5.14).7 ND 1.9~2..0 4.35).8 4.0%.6 1.1%.9 1.3%.3 5.9N).8 4.9%.6 ND

1. 99). 6 ND 7.5+0.8 2.8+0.6 1.2<<0.9 0.9i0.6 6.3s0.7 3.0 %.8

1. 7io. 5 3.2i0.5 ND 1.2%.9 1.2tl.l 3.75).6 3.4A.5

<<Sensitivity 1.6 ND - Not detectable 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

Table 11 PUBLIC MATER Location No. of

~San les honvolatile betas Cr Ci liter Ru

's S ecific Radioauclides Zr-hb Zn Bs-La Rs+

Vilson Dan Colbert SP Clenents School 1.9 ND ND ND ND 3.1-0.9 ND 2.1-0.6 0.7'0.4 ND ND 3.040.9 0.9 0.6 3'-1.1 4.3'Q.9 ND 4.0il.l 3.0 0.7 p'.8 p.4 ND htheas Courtland Tova Crceh Trlaity Decatur Shef field (Yuscle Shoals)

@heeler Dan Clmnploa Paper Co.

6 2.3 2.2 2.6 ND ND ND.

2. 2 ND 1.8 hD 1.7 ND

=- 2.0 3.4 1.9 2.6 1.9 1.6 1.8 2.6tl.7 2.3-1.3 1.6f0.9 0.8'-0.3 hD 15407 2 ~ 5-0. 9

2. 5t1. 2 0.5+0.4 ND

0. 5-'0. 4

0. 8'-0. 6 0.6i0.2 1.00.5 1.IN0.5 1.>0.5 ND 0.3 0.1 ND 1.010.9 ND ND ND 0.7i0.5 ND ND 2.5i0.3 3.9a1.2

5. 6al. 0 6.lil.0 2.0i0.9 3.5a0.9 1.7'0.6 3.0B1.6 ND 5 0-1.2 3.4i0.6 4.3ip 9 5.6-0.8 1,7f1,2 3,4ip,8 5 4iQ 7 1.4f1.2 4.5iQ.7 2.9a0.5 ND 408t55 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 uarter January-March, 1975 Location'n-Site (9)*

Maximum Minimum Average**

Environmental Gamma Radiation Levels I

~/

0.018 39.9 0.012 26.3 0.015+0.005 31.8+10.0 Off-Site (8)

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

Maximum Minimum Average Off-Site (8)

Maximum Minimum Average 0.016

. 0.011 0.013+0.003 0.015 0.009 0.012+0.004 34.0 23.7 28.4+7.0 33.1 20.0 26.2+8.4

• Number of stations (three TLD's at each station)

• • Allaverages reported

+2a

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

876.4 1735.7 1481.8 700.5 Specific Radionuclides

'""'44C "Cr 131Z 103~106Ru 134CS 1 37Cs ND ND ND ND ND ND ND

5. 5+3. 3 ND ND ND ND ND ND Zr-Nb 58C S4M ND ND ND ND ND ND Zn 60Co ND ND ND 11.5+3.8 ND 9.9+3.6 ND K

1622.0+69.0

'1986.6+87.5 2211.1+91.1 1344.6+89.1 140 140 Ba-

"Sr 89S

7. 3+1. 2

5. 2+2. 5 ND 4.6+2.3 46.8+4.8 8.4+6.0 6.9+1.9 54.8+3.0

• 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 51(r 1 31Z 103> 106R 134C 1 37C ND ND ND

5. 3+1. 9 ND ND ND ND ND ND ND ND ND ND ND ND ND Zr-Nb 5 8(.

'"Mn 6 sZn 60C ND ND ND

4. 5+3. 8 ND

7. 9"-5. 0 ND 1511. 7%3. 3 1106. 1"-90. 8 2406. 6 "-112. 8 2493. 3 "-111. 1

'4'aa- '4'La "Sx 89Sr

4. 0@. 1

15. 1+M.6 ND

1. 8"-1. 3 12. 3 "-3. 1 1.5-1.4 5.6"-1. 9 ND ND

3. 9+-1. 3 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 Muscle Shoals Chicken Plant Area Muscle Shoals Gross beta*

769.9 3.35 3.33 Specific Radionuclides 141pl44 Ce S1C 1311 103a106R 134CS 1 37C 36Zr-36Nb SBC

'4Mn 6SZ "Co 4

K 140~

140L

"'Sr 89S ND ND ND ND ND ND ND ND 1380.9+104.5 ND

9. 9+1. 4 ND ND ND ND ND 5.50+0.70 ND ND

0. 2+0. 1

0. 2+0. 1 ND ND ND ND

6. 4+0. 4 ND ND

• Sensitivity 0.1 (pCi/g, dry weight)

ND Not detectable

Reservoir Monitorin Samples are collected quarterly along seven cross sections in Wheeler Reservoirat 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 average beta concentration is 0.20 percent of MPC for samples collected

't 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, Sr, and Sr.

The composite 89 90 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 Sr 89 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 Sr and Sr 89 90 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 Tennessee River (Mile)

Zooplankton, Chlorophyll, Benthic Fauna*

Sediment*

Fish**

Distance From Left Bank Depths Feet Percent (Meters) 277.98 2

2 283.94 288.78 3600 40 7100 78 1

1, 10 291.76 293.70 5000 60 1

7000 84 1,

5 6800 65 1

9200 88 1,

5 295.87 307.52 "4000 44 7500 82 1800 24 2800 37 1,

5 1

1, 5

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 ile28878 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 Nile Sanoles Locations Neters

~AI ha*+

Betaes*

Ce 8 ecific Radionuclides Cr I

Ru Cs Cs Zr-Nb "Co Hn Zn Co Ba-La Sr 4 Sr 283.94

-283.94 283.94 40 78 78 1

ND 2'

1 ND 2.5 10 ND 3.3 ND ND" 0.9 0.4 ND ND 4.551.2 2.150.7 ND 0.8-0.5 bD ND 3.6 1.1 4.6 0.9 ND ND 1.4 0.4 1.5i0.6 0.6 0.4 291. 76 2

60 2.2 ND ND

2. 751. 1

3. 8f0.8 0.4 0.3 291. 76 291.76 84 2.2 2.4 ND ND ND ND ND ND ND ND ND 1.5t0.6 2.1i0.6 0.5t0.4 ND ND 2.540.7 1.7+0.6 0.8+0.3 293.70 293.70 293.70 65 88 88 1.8 2.3

3. 9i2. 0 ND ND hD ND 0.7+0.4 I,.5+0.8 1.7i0.6 6.1+1.0 1.3%.7 0.7i0.4 ND ND' ND 5.0&+.2 3.2'0.9 0.4+0.3 iND ND ND 3.10.8 1.4+0.6 0.8+0.4 0.6i0.3 295.87 295.87 295.87 44 82 I

ND 5

ND I

ND 2.8 2.8 1.9 ND 1.4i0 4 ND 4.0tl.2 3.5 0.9 1 li04 ND 2'i0.8 1.1i0.7 ND 0 5-'0.4 ND 1.7i0.5 2.4i0.7 0.4i0.3 0.8-'0.4 307.52 2

24 I

ND 307.52 2

24 5

ND 2.4

3. 9i1. 4 ND 4,1 ND ND ND l,li0.9 1.4+0.6 ND

4. 7 el. I

2. 7i0.8 ND

3. 1 i0. 6

2. 1%. 5 ND 0.7i0.5 ND

0. 9+0. 6 307.52 I

37 I

ND Avera e:

ND 2.1 2.3 ND ND 0.580.2 ND ND ND 0.%0.1 ND ND 5.0%.9 2.1i0.6 0.5i0 3 0 7i0.5 ND 3.5i0.2 2.4+0.2 0.4.1 0.4'.l

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

Table 16 RIVER WATER Total Activit Ci/liter Tn Depth R'ver No. of Boric.

in Cross Nonvolatile Nile

~Sa= les Locations Haters Alohaa*

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

283.94 283.94 283.94 2,

40 2

78 1

2 78 10 2.8 2.6 3.1 ND ND ND 1.3t0.9 ND 1.8+1.4 hD ND hD ND ND 2.0-0.9 ND ND ND ND 2.0 0.8 HD 5 3fl 4 3 8 0 9 1 4t0 4 0 7a0 4

ND HD 4.0-'1.0

. 4.5+1.0 1.0+0.5 1.6f0.7 HD 4.Iil.2

4. 0-1. 1

0. 6-0. 4

0. 8-0. 3 291.76 291.76 291.76 60 84 1

ND 1

ND 5

ND 4.0 ND hD ND hD 3.4 3.2t2.0 ND hD ND

l. 7 3.4 t3.1 ND ND ND ND 2.6t0.3 HD HD

, 1.6+0.9 O.gx0.6 ND ND 1.6tl.l ND 6.5x1.4 4.6+1.2 0.6+0.4 0.5-0.3 ND 2.3xl.l 5.3+1.0 0.7t0.5 0.6f0.5 ND 4.6+15 31+10 08'03 05+02 ND 293.70 293.70 293.70 65 88 38 1

ND 22 ND ND HD 3.6t3.0 2.0 ND HD hD ND

2. 2

5. 213. 2 ND ND ND ND ND ND HD hD

5. 9tl. 3

2. 5il.2

0. 8+0. 3 HD HD ND ND 2.0+1.0 4.8t0.9 ND 0.7-0.4 ND ND 7.lil.6

3. 8+1. 1

0. 9+0. 4 ND 295.87 295.87 44 I

ND 44 5

3.5 3.5 ND ND ND 0, 910. 8 ND

4. le3. 0 ND ND ND hD 0.9i0. 5 ND HD ND hD ND 6.1+A.l 2.6f0.8 ND 0.7t0.4 ND 6.1tl. 6

4. Oil.3

0. 8tO. 4 0.5i0. 4 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 0.5 307.52 307.52 307.52 24 1

ND 24 ND 37 1

ND 2.6 2.3 2.2 ND ND ND ND l.lt0.9 0.7i0.5 ND ND 5.4ti.3 3.3'.9 ND 0.8rO ~ 5 ND

6. 1%. 1

3. 4K. 9

1. 3+%. 4 ND hD ND 1.2'.l 2.2%.8 0.5'.3 0.6%.4 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 Location Browns Perry at discharge location No. of

~Sam les Alpha*

~(Av.)

Max.

6.1 Min.

~Av.

2.1 3;3 Nonvolatile Beta+*

141'44(

51Cr 131I 103'06R 1 34C 137G 95Zr-"Nb Co Zn 60(

140B 1 '0L 90Sr "Sr 3H*A*

ND ND 0.7+0.6 ND 1.1+0.7 1.0+0.6 ND ND ND 2.8+1.4 4.4+0.9 5.4+1.2 0.4+0.2 0.8+0.2 ND Specific Radionuclides Avera e Elk River 5.3 2.2 2.9

'4'44C "Cr 131I 103> 106R 1 34CS 137C 95Zr-95Nb Co 65Z 60C 140B 140L "Sr 09Sr 3H*A*

ND ND ND ND.

1.2+0.4 0.9+0.4 ND 0.6+0.5 ND 3.4+1.2 3.8+0.6 5.3+0.6 0.4+0.2 0.6+0.3 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. of Cross

~Sa les

~A1 ha*

Cross Beta**

Ce v Cr I 'u S ecific Radionuclide v Zr-Hb Co Cs Cs Yn Zn Co

'Ba-La Sr Sr Cuntersville Sealluouth Buffalo (I'hole)

Snallnouth Buffalo (Flesh) 5.30 2

ND 4.52 0.310.1 ND ND 0.1-0.02 HD ND 0.2t0.04 ND ND ND HD ND ND

0. 2-0. 03

'heeler White Crappie (Flesh)

Smlluouth Buffalo (Rhole)

Suallnouth Buffalo (Flesh) 5.50 2

HD 5.14 2

HD 4.47

0. 1-0. 06 ND 0.4+0.07 ND O.li0.06 ND ND ND 0.4a0.04 ND 0.1+0.02 HD 0.1-0.03 ND ND ND ND

'iD VD ND ND ND ND hD wilson ate Crappie (Flesh)

Snallnouth Buffalo (Hhole)

Suallnouth Buffalo (Flesh) 2 ND 3.78

0. 1RO. 06 ND 1

ND 3.79 2

ND 5.88

'D 0.3t0.1 ND ND 0.3i0.05 ND ND ND ND ND ND ND 0.2-0.02 ND

0. 1-0. 02 ND 0.2'0.02 ND ND 0.2-0.05 Mhite Crappie (Flesh)

<<Sensitivity 0.02 a*Sensitivity 0.03 BD - Not derectable 2

ND 5.97 0.2i0.09 HD ND 0.4>0.03

39 Table 19 PLANKTON Ci/

D Wei ht Tennessee River Mile 277.98 291.76 307.52 No. of

~Sam les Gross

~A1 ha*

1.08 1.30 2.14 Gross Beta+*

19.43 13.36 18.34 Specific Radionuclides+**

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 Gross Alpha*

0.94 0.81 0.54 Oe92 4

4 0.80 Nonvolatile Beta+*

Specific Radionuclides

'.07 8.48 5.47 7.47 7.37 1419144 C

51C 131I 1039106Ru 134Cs 137C Zr-Nb 1.0+0.3 0.4Ã.2 ND 0.4+O.l

0. 4+0. 2 1 e 1 iO. 2

0. 3+0. 1

0. 5+0. 2

0. 6+0.1 6.4+0.2 3.6+0.2 2.1+O.l 0.6+O.l 3.2+0.1 0.2+O.l 0.8+0.1 0.2+0.04 0.2+0.06 0.4+0.04 50C 54Mn "Zn 60C ND O.1+0.1 0.2+0.1 0.2+0.05 0.2+O.l ND 0.2+0.05 140Ba 140La 30S "Sr 0.2+0.1 0.3+0.06 0.2+0.03 0.3+0.05 0.2+0.03 0.2+0.05 0.2+0.05 0.2+0.06 0.2+0.05 0.2+0.03 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 No. of Samples Gross Alpha*

277.98 288.78 293.70 0.11 307.52 0.24

~Avera e

0.09 Nonvolatile Beta**

2.30 2.36 2.69 3.01

-2.59 Specific Radionuclides

'""'44C 510 131Z 103>106R 134C 137C 95Z 95Nb "Co 0.5+0.07 0.5+0.05 O.1+0.02 0.5+0.08 0.5+0.1 0.1+0.07 0.5+0.04 ND 65Z "Co 140B 140L "Sr ND 3.3+0.2 ND 4.2+0.3 ND 5.6+0.2 ND 0.1+0.02 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 No. of Samples Gross Alpha*

Nonvolatile Beta**

Specific Radionuclides 14 1

> 144(

51 Cr 1 3 1I 103~ 106R 134C 137 Cs 95 95 Zr-Nb 58 Co 54 Mn 65 Zn 60Co 140 140 Ba-La 90S 89 Sr 277.98 ND

l. 73 2.4+0.4

1. 8+-1. 0

0. 2+0. 05

0. 4+0. 3 0.7-+0.2 ND ND

0. 4-+0. 2 0.5+0.1

0. 6+0. 1 0.2+0.03 288.78

1. 19

l. 3+0.6 3.2+0.9 0.3+0.1 0.4+0.2 0.3+0.1 ND ND

0. 3+0. 1 0.5+0.1 NA 293.70 ND 1.28

2. (L0.5 2.9+0.9 0.6+0.1 0.7+0.4 0.2+0.1 0.7+0.2 0.2+0.1 ND ND

0. 3+0.

1'.

6+0. 1

0. 1+0. 02 307. 52 0.87 2.2+0.5

'0.5+0.4 0.5+0.1 ND 0.1+0.05 0.6+0.3 ND ND ND

0. 2+0. 05 0.5+0.1 NA

-NA

~Avera e

ND 1.27 2.P 0.3 2.1+0.4

0. 4+0. 05 Q. 4+0. 1; O.1+0.03 0.6+0.1 ND ND

0. 1+0. 05 0.3+0.05

0. 6+0. 05

0. 2+0. 02

• 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.