ML19323D934

Annual Radiological Environ Surveillance Rept,1979.

ML19323D934
Person / Time
Site:	Vermont Yankee
Issue date:	05/20/1980
From:	VERMONT YANKEE NUCLEAR POWER CORP.
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ML19323D933	List: ML19323D932 ML19323D934
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NUDOCS 8005220562
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Text

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O I

VERMONT YANKEE NUCLEAR POWER CORPORATION l l

ANNUAL RADIOLOGICAL ENVIRONMENTAL j SURVEILLANCE REPORT I

JANUARY 1,1979-DECEMBER 31,1979 l

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Vermont Yankee Nuclear Power Corporation Engineering Office Environmental Engineering Department 25 Research Drive Westborough, Massachusetts 01581 ga>59&oGL9-

. TABLE OF CONTENTS page I I Introduction..................................... 1 II Location of Sampling Stations.................... 3 III Summary of 1979 Environmental Dara............... 12 i

t 4

IV Quality Assurance Program....................... 37

! V Analysis of Environmental Media. . . . . . . . . . . . . . . . . 38 i

3 VI Environmental Dosimetry. . . . . . . . . . . . . . . . . . . . . . . . . 53 VII Conclusion...................................... 56 VIII References...................................... 57 e

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. LIST OF FIGURES Page Figure 1. Location of Plant........................................ 6 Figure 2. Site Topography.......................................... 7 Figure 3. TLD Locations Close to Plant............................. 8 Figure 4. Milk and Water Sampling Sites............................ 9

Figure 5. Food Products, Fish and Soil Sampling Sites............. 10 Figure 6. TLD, Air Particulate, Aquatic Vegetation and River Monitoring Sites.............................. 11 Figure 7. Gross Beta activity in Air Particulate Filters................................................. 39 e

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. LIST OF TABLES Page Table 1 Location of Soil Sampling Stations.................... 43 Table 2 Maximum Values of Lower Limit of Detections for So11................................... 45 Table 3 Isotopic In-Situ Soil Analysis, Activity Concentration................................ 46 Table 4 Isotopics In-Situ Soil Analysis, Exposure Rate......................................... 47 Table 5 Comparison of Laboratory Soil and In-Situ Results....................................... 48 '

Table 6 1979 Average TLD Exposure............................. 52 Table 7 Summary of Environmental Radiation Doses.............. 55 e

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I. INTRODUCTION This report contains a summary and analysis of the radiological data collected during 1979 by the Environmental Studies Laboratory of the Vermont Yankee Nuclear Power Corporation.

We measure direct radiation in the stations environs with CaF2 :

Mn TLD badges. Vermont Yankee personnel prepare, distribute, measure and calibrate these dosimeters. We refer all measurements of radionuclide concentrations to an off-site environmental radioactivity laboratory. All the environmental samples were processed by the Yankee Environmental i Laboratory, located in Westborough, Massachusetts. 1

- Section II of this report contains a list of all sampling stations used in 1979 as well as a tabulation of the media sampled at each station.

Figures 1 through 6 indicate the location of the plant site, its topography and the locations of the~ sampling stations.

Section III summarizes the environmental data. A computer program, ERMAP, produces a digest of the 1979 measurements. Each environmental media appears according to the alphabetical order of its media code. At the top of each page, ERMAP lists the units of measurements for each media. The left hand column contains the radionuclide which is being reported, total number of analysis of that rad-lonuclide, and the num'ver of measurements which exceeds ten times the yearly average background value. The latter are called "non-routine" measurements. The next colu'mn lists the nominal lower limit of detection (LLD) for each radionuclide. The LLD used by the h

1

Yankee Environmental Laboratory for each radionuclide is based on the methodology in the USNRC Regulatory Guide 4.8 (Reference 1).

Those sampling stations which are adjacent to the plant and which could conceivably be affected by the operation of Vermont Yankee are called

" indicator" or " Zone I" stations. Distant stations, which are beyond plant influence are called " control" or " Zone II" statione.

ERMAP calculates a set of statistical parameters for each radionuclide. This set of statistical parameters includes separate analyses for (1) the indicator stations (2) the control stations, and (3) the station having the highest annual mean concentration. For each of these three groups of data, ERMAP calculates:

1) The mean value of all concentrations including negative values and

- values below LLD.

2) The square root of the mean square deviation. This is an estimate of the sample variance.

3) The lowest and highest calculated concentration.

4) The number of positive measurements (measurements greater than the LLD) divided by the total number of measurements.

In the final sections, we analyze the results of our efforts in 1979, calculate environmental radiation doses, and present our conclusion.

2

1

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II. LOCATION OF SAMFLING STATIONS The following two pages list our sampling locations. Distances and azimuths are measured from the plant's stack; directions are relative to true north. The media codes are:

AP Air particulate C Charcoal air filter FI Finfish M Milk SS Sediment i

VA Aquatic vegetation VT Terrestrial vegetation

- WG Fresh water WR River water FD Food crope h

3 _ _ _ _ _ . , , _ ,. ,_ _ _

Direct Radiation - TLD Dosimeter Sites Sampling and Analysis Frequency - Monthl Zone I Distance (Km) from Sample S ation Locations Plant Stack Azimuth GM 1.0 Hinsdale, NH 1.1 580 GM 1.1 N. Hinsdale, NH 4.1 3360 GM 1.2 Hinsdale, NH (Hinsdale Substation) 3.1 860 GM 1.3 River Station #3.3, VT 1.9 1560 GM 1.4 central Park Station, VT (Fairman Rd.) 2.4 2160 GM 1.5 Guilford, Rd., Vernon (Tyler Hill) 2.7 2820 GM 1.6 Site Boundary 0.160 3240 GM 1.7 Site Boundary 0.315 2850 GM 1.8 Site Boundary 0.315 2120 GM 1.9 Site Boundary 0.450 1860 GM 1.10 Site Boundary 0.630 1830 GM 1.11 Site Boundary 0.920 1770 GM 1.12 Site Boundary 0.760 1640 GM 1.13 Site Boundary 0.480 1480 GM 1.14 Site Boundary 0.315 1310 GM 1.15 Site Boundary 0.027 110 GM 1.16 Site Boundary 0.395 3050 GM 1.17 Site Boundary 0.575 2050 Zone II GM 2.1 Hogback Mt., VT 25.0 2950 GM 2.2 Spofford Lake, NH 16.1 250 GM 2.3 Northfleid Station 11.3 1580 o

=

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• i OFFSITE ENVIRONMENTAL R4DIOLOGICAL MONITORING 00/05/16 PAGE 2

SUMMARY

FOR THE PERIOD 12/28/T8 = 12/31/T9 STATION INPUT DATA FilR 27 ST A TitINS STATION FUNE MEDIA CHnFS STATION IDENTIFICATION 10 1 AP C VT HINSDalE,NH 1.2 MM ENE VV AP C VT N.HINSDALE 4.0 MM NMn VV 11 1 12 1 AP C VT HINSDALE SUR. 3.1 MM E VV AP C VT RIVER STA.NO. 3.3 1.9 MM SSE VV 13 1 le 1 AP C VT CENTRAL PARM STA. 1.5 MM SSa VV 15 1 AP C VT GUILFORD ND VT. 2.4 MM nNa VV 2 AP C VT HOGRACM MI.' VT. 2$,0 MM MNn VY 21 AP C VT SPDFFORD LAME,H.H. 16.1 MM NhE VY 22 2 AP C VT NOWTMFIELD, MASS. 11.3 MM SSE VY 23 2 H FD MILLER FAWM 0.4 MM kMw VY ll I 12 1 M wHI t a ME R FARM 2.6 KM SE VY 13 1 M HATHLON FARM 5.5 AM E VY 2 M FD RRATTLFBURO FARN 15.0 MM N VY 21 11 1 WR SS FI NIVER STA.NO. 3.3 2.2 MM DOWNWIVFR VY 12 1 WR SS FI PLANT DISCHARGE 0.0 MM ONSliF VY 21  ? hR SS F1 RT 9 RRIDGE 12.8 kN UPRIVER VY ll 1 WG VY PLANT WELL 0.0 MM ON Si l F VY i VERNON NURSING HELL 2.0 MM SSE VY 12 WG LA 13 1 WG VT NO.' 32

• ELL l.8 MM NNH VY NG BRATLEHORU WELL 12.1 M NNN WY 21 2 ll 1 VA DOWNSTREAM SWAMP 0.5 kM DOWNRIVER WY 12 2 VA UPSTREAM SWAMP 0.5 MM UPNIVER VV t

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III.

SUMMARY

OF 1979 ENVIRONMENTAL DATA The following pages summarize the analytical results of all the environmental samples which were collected during 1979. These pages were generated by the computer program, ERMAP.

l 4

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12 - - - - - _ , _ _ _ _

out05/tae PAGE 4 VENMHNT YANKEE OFFSIIE ENVIRONMENTAL RADIHLHGICAL NUNITHNING SUMMANY FOR THE PFR10D 12/2M/78 - 12/31/19 MEDIUM AIR PARf!CULATF FILTERS UNITS: PCI/CU. M CAOIONUCLIDES INDICATHR STATIONS HIGHEST STATION CON T HHI LOCATIHNS MEAN. RANGE,AND MEAN,RANGF,AND MFAN.RANGF,AND (NO. ANALYSES) NHMINAL (NON= ROUTINE)* LLD NH. OETECIFD** STA. NH. DFTECTEDee NH. pFTFCTEHee GR-H (467) 4.0E.03 ( 4.0 A .1)E 2 23 ( 5.1 A 9)E -2 ( 4.2 A 3)E 2

( 0) (10.0 - lato.0)E -4 ( 3.0 . 460.0)E -3 ( 3.C - 4e0.9)F -I

• (309/312)* *( St/ 52)* *(154/195)*

5%=89 ( 51 4.0E-03 ( A.5 A SA.4)E .4 13 ( 6.7 A 6.6)F -3 (-3.3 A a15.7)F 5

( 0) (=5.0 - 6.7)E 3 (-o.2 - 5.6)F -3 ef 0/ 21e et 0/ 1)e et 0/ 3).

S;.90 ( 5) 7.0E=04 ( 4.0 A 0)E -4 23 ( 6. 7 A 17.9)E -4 (-6.M A St.6)E -5

( 01 ( 3.9 - 4.0)E -4 (-l.1 = 71F 3

• ( 0/ 2)* *( 0/ 1)* a( 0/ 3).

CE-7 ( 36) 2.0E-02 ( 6.6 A .3)E -2 10 ( 7.4 A 5)E -2 ( e.1 A 4)E -2

( 0) ( 4.4 = 9.1)E 2 ( 6.5 8.5)E -2 ( 4.0 - 8.5)F -2

• ( 24/ 24)* *( 4/ 4)e et 12/ 12)e K-30 ( 16) 4.0F=02 ( 8.7 A 1.3)E 3 10 ( l.5 A 8)E -2 ( M.7 A t.2)E .3

( 0) (.4.2 = 24.6)E -3 ( 2.3 - 19.8)F -3 p.

La *( 0/ 24)* *( 0/ 4)e *( o/ 12).

CR=51 ( 36) 2.0E-02 (=4.4 A 6.3)E -4 21 ( 2.3 A 1.9)E =3 ( 7.5 A 7.8)E -4

( 0) (-6.5 - 6.3)E -3 (-2.3 - 6.1)F -3

• ( 0/ 24)* *( 0/ 4)* *( o/ 12)e MN.54 ( 36) 2.0E=03 ( B.9 A 5.7)E -5 23 ( 4.9 A 2.1)F -4 ( t.7 A 1.0)E -4

( 0) (=3.6 = 8.1)E .4 ( 6.8 - 91.5)E ~5 (-2.6 - 9.2)F -4

• ( 0/ 24)* *( t/ 4)* *( t/ 12)*

CD-58 ( 36) 2.0F=03 (=5.1 A 7.9)E -5 11 ( 2.7 A 1.2)F -4 -(-1.5 A 7)E 4

( 0) (=7.s - 5.2)E -4 (-5.7 - 3.2)F -4

• ( n/ 241* *( 0/ 4)e e( 0/ 12)e FE=59 ( 36) 3.0F=03 (=1.5 A 1.4)E -4 13 ( 2.7 A 3.7)E -4 (-1.9 A 2.0)E -4

( 0) (-1.5 = 1.2)E -5 (-1.3 - 9)F -3

• ( 0/ 24)* *( 0/ 4)* a( U/ 12)e

• NHN.HHHIINE REFFRS TO THE NUMAE R HF SEPARATF MEASUHFMENIS hMICH >FHE G4FATFW THAN TF N (10) TIMES THE AVERAGE HACKGROUND FOR THE PENIHD HF 1Hf HEPOWI

• • THE FRACTION OF SAMPLE ANALVSES YTELDING DETECIAPLE MEASupEMENTS (T.E. >LLD) IS INntCATED NITHIN *( AND )*.

- + - - . ,

VE RMflNT YANXtF OFFSITF FNVIRUPHEHTAL HADIOLOGICAL MUNITORING 80/05/86 PAGE S

SUMMARY

FOR THF PERIOD 12/28/78

• 12/31/79 MEDIUM AIR PARTICULATF FILTERS UNITS: PCI/CU. H CA310NUCLinES INDICATUR STATIONS HIGHEST STATION CONTROL LOCATIONS MEAN, RANGE.AND PEAN,RANSF,AND MEAh,RAPGF,AND (NO. ANALYSES) NUMINAL (NUN-ROOTINEle LLH NH. DFTECTfD*e STA. NO. DEIECTEDee hb. UETECTEDe*

C0=60 ( 36) 2.0E-03 ( t.4 A 7)E -3 23 ( 4.9 A 1.8)E -3 ( 2.1 A 8)E ~3

( 0) (=8.3 - 160.0)E .4 ( 2.8 = to.41F -3 (.3.3 - 104.03E -4

• ( 3/ 24)* *( 4/ 4)* et 6/ 12)e ZN=65 ( 16) 4.nE-03 (-3.5 A 1.n)E 4 23 ( M.8 A 2.61F -4 ( 5.7 A 1.8)E ~4

( n) (-2.7 - 1.n)E -3 (-4.0 -

1%.8)F -4

• ( 0/ 24)e *( 0/ ele et 0/ 121*

2 =95 ( 16) 3.0E-03 (=2.7 A t .6)E -4 23 ( 3.3 A 1.3)E -4 ( t.3 A 1.0)E -4

( 01 (=2.7 = 8)E -3 (-4.3 - 6.2)E .4

• ( 0/ 24)* et 0/ 4)* *( 0/ 12).

EU-103 ( 36) 2.0E-03 (=8.3 A 7.3)E .5 13 ( t.5 A t.21F -4 ( 3.8 A 7.m)F -5

( n) (-9.6 - 5.8)E .4 (-2.7 - 6.0)E -4

• ( 0/ 24)* *( U/ 4)e et o/ 12)e CU-106 ( 36) 2.nE 02 ( 2.0 A 6)E -3 12 ( 3.4 A 1.91E -3 ( 6.5 A 4.2)E -4

r. ( 0) (-2.6 - 7.4)E -3 . (-2.8 - 2.A)F -3 8' *( 0/ 24)e *( U/ 4)* ef 0/ 12)*

I-131 ( 36) 3.pE-03 ( 5.1 A 22.2)E ~5 to ( t .6 A 6)E -3 (=3.4 A 29.M)E -5

( n) (-l.9 = 3.3)E -3 (.2.7 - 1.2)E -3 e( 0/ 24)* *( 0/ 4)* et 0/ 121e CS-134 ( 36) 2.0E-03 (=9.5 A 13.5)E -5 23 ( 1.7 a 2.2)E -3 ( 5.2 A 7.11F -4

( c) ( 9.2 = 25.4)E .4 (.t.1 - 8.2)E ~3 (-1.1 - R.21F -3 et 1/ 24)* e( 1/ 4)e *( t/ 12).

CS-137 ( 36) 2.nE-03 ( t.2 A .2)E 3 23 ( 5.1 A 3.9)E -3 ( 2.5 A 1.3)F -3

( 0) (-2.6 - 52.8)E -4 ( 1.F - 168.0)E -4 (=4.0 -

16HO.0)F -5 et 12/ 24)* *( 3/ 4)* et 8/ 12)*

B4=140 ( 36) 5.0E.03 (=1.4 A 1.9)E 4 to ( 3.0 1 5.71E -4 (=1.5 A 1.H)F -4

( o) (-2.0 - 2.0)E -3 (-1.4 -

3.1}F -3 et 0/ 24)e et 0/ eje et of tale CE=let ( 36) 3.0E.n3 (.4.9 A 9.8)E -5 11 ( 2.4 1 3.8)E -4 (-5.9 A I4.9)E -5

( n) *

(-6.4 - 12.3)F -4 (-1.4 - 7)E -5 et u/ 24)* e( U/ 4)* et 0/ 121e e NON-RH3TINF REFFRS TO THE NUHRER HF SE P AR A TE HE A SHRFMENIS dHICH MFWE GWE41FR THAN TEN (101 TIMES THF AVFRAGF HACAGkHHun FOR THE PFRIOn OF IHF N E PilR 1

• • THE FRACTIOP DF S4MPLF ANALYSFS YTELnTNG DETECIAHLE "EASUREMENIS (I.F. >l 10) IS. INDICATED NI1HIN *( AHr le.

s. .

80/05/16 PAGE o V E R Mna4 I YAuxEE nFFSITE ENVIDONMENTAL DADIHLnGICAL AUNITORING

SUMMARY

FOR THF PERIOD 12/2M/78 . 12/31/79 UNITSg PCI/CU. M CEDIUM: AIN PARTICULATE FILTERS RADIONUClinFS INDICATOR STAllHNS HIGHEST STATInN CONTHOL LOCATIHNS MFAN, RANGE,AND MEAN,RANGF,4ND MEAN,WANGE.AND (NO. AN ALYSF S) NOMINAL (NON. ROUTINE)* LLD NO. DFTECTEDen STA. NO. OFTECTEDee NO. OFTFCTED**

.3)E -3 12 8)E .3 ( 2.5 A 6)F 3 CE.144 ( 36) 2.0E 02 ( 1.8 A ( 3.4 A

( 0) ( 1.0 - 5.2)E .3 ( t.5 5.2)E 3. (.o.1 -

66.7)F . '4

• ( 4/ 24)* e( 2/ 4)e *( 3/ 12)*

TH.22A ( 36) 9.06 03 ( 7.0 A 2.01E .4 10 ( t.4 A 7)E .3 ( 6.6 A 2.9)E .4

( n) (.4.3 3.4)E 3 (.t.1 .

2.6)E .3 e( 0/ 24)e *( 0/ 4)e et n/ 12)*

a NON.kOUTINE REFENS TO THE NUMBER OF SEPARATF'MEASURFMENTS WHICH hERE GREATFR THAN TE N (10) TIMES THE AVERAGE BACKGROUNO FOR THE PERIOD OF THE REPHRT em THE FRACTION OF SAMPLE ANALYSES VIELOING DETECTAHLE MEASUREMENTS

( 1. F. . >LLD) IS INDICATED WITHIN *( AND 18 e--

U J

VEWMHHT YANNEE OFF311E ENytRUNMENTAL QADIOLOGICAL HONITORING 80/05/l6 PAGF F SilMMARY FOR THE PFRIOD 12/7A/To - 12/31/79 MEDIUM CHANCHAL FILTERS UNIIS: PC1/CU. M CADJONUCtIDES INDICATOR STATIONS HIGHEST STATION CONTROL LOCATIONS (t0 ANALYSES) NOMINAL MEAN,HANGE, ann MEAN, RANGE,AND MEAN,RANGF,Ar4D (NON=RUOTINE)* LLD NO. DETECTED ** STA. NO. OFIECTED** NO. DE1FCTED**

!=131 (467) 3.0E=03 ( l.8 A 6)E .3 12 ( S6A 1.9)E -3 ( 3.3 A l.2)E -3

( 4) (-3.7 4.6)E .2 (-5.0 - 6.8)E =2

• ( 5/311)* *( 0/ 51)* *( 2/t56)*

• NON=HOllilHE REFENS TO THE NUMHER OF SFPARATE MEASURFMENTS HHICH >FRE GREATER THArs TEN (to) TIMES THE AVERAGE BACMGROUND FOR THE PERIOD OF THE REPORT

• • THE FW ACTION OF SAMPLE ANALYSFS YIELDING DETECTAPLE MEASUREMENTS (f.F. >LLD) IS TNp!CATED MITHIN *( AND )*.

80/DS/16 PAGE M VEWHONT YAhxEf 0F F SI TF FNVICHNMENT AL # AD10 LOGIC AL MONITORING

SUMMARY

FOR THE PERinD 12/PR/7A . 12/31/79 MEDlHM FOOD / GARDEN CRUPS UNITS: PC1/KG hET RADIONUCLIDES INDICATOR STATIONS HIGHEST STATION CUNIROL LOCATIONS (NU. AN4(ySES) NOM]NAL MEAN, RANGE,AND MEAH, RANGE.AND MEAN,RANGF,AND (NON.ROUTINEle LLD NO. DETECIFD** STA. NO. OETECTEDe* hu. OETECTE0ee 4.6)E l 21 ( 7.8 A 5.0)E I ( 7.8 A 5.0)E t HE.7 ( 23 2 ( 6.3 &

-( 0)

• ( 0/ 1)e et 0/ 1)e a( 0/ 1)*

.30 ( 2) 5 ( 2.5 A .1)E 3 21 ( 2.5 A .2)E 3 ( 2.5 A 2)F 3

( 0) et 1/ 1)* *( 1/ 1)* e( 1/ 11e C2=51 ( 21 3.2E+02 ( 7.8 A 4.2)E t it ( 7.8 A 4.2)E 1 ( 9.9 A 56.5)E o

( 0) et 0/ 1)*

• ( 0/ 11e et 0/ 1)* .

MN.54 ( 2) 2.0E.02 (.4.7 A 5.2)E o 21 (.2.7 A 6.7)E O ( 2.7 A 6.7)E o

( 0) (.4.7 0.0)E o (.2.7 o 0)E O e( n/ t)e *( 0/ lie et 0/ 11e CO.58 ( ,2) 2.0E.02 ( 4.7 A 5.4)E o it ( q.7 A 5.4)E O ( 5.1 A 6.6)E o

( 0) (.3.1 - 0.0)E O et 0/ 1)e et e/ 1)e et 0/ lie

%4 FE.59 ( 21 3.oE+01 (.6.3 A 11.6)E o 21 (.t.2 A 12.7)E o (.1.2 A 12.7)E o

(.l.2 n.0)F o

( 0) (.6.3 0.0)E O et 0/ t)e et 0/ 1)e *( 0/ lie CO.60 ( 21 2.0E.02 (.5.4 A 7.6)E O 21 ( t.9 A 10.8)E o ( l.9 i to.8)E o

( 01 (.5.4 . 0.0)E O

• ( 0/ 1)e *( 0/ 1)e *(

• 0/ 1)e ZN=65 ( 23 6.7E+01 (.l.2 A 1.5)E I 21 ( t.5 A 1.4)E I ( l.5 A 1.4)F i

( 0) (.t.2 o.0)E 1 et 0/ l)e *( 0/ I)e et 0/ 1)e ZR.95 ( 21 4.pE.02 ( 7.6 A 9.3)E o it ( 7.6 A 9.3)E o (.t.5 A 12.4)F 0

( u) (.l.5 - 0.o)F o

• ( 0/ 1)* *( 0/ 1)* *( 0/ lie e NHN.ROHTINE REFERS TH TFE NUMBER flF SF P A!! A T E MEASURF6ENIS WHICH rERF GHEATEH THAN IFN (101 T it*f S THE AVERAGE RACMGWHUND FOR THE PENIHn NF 1HE REPORT se THF FHACTION OF SAMPLE ANALYSEM YTELnING DETECTAHl.E HEASUREMENIS (f.E. >LLD) IS ThofCATED HITHIH a( AND )*.

60/U5/16 PeGF tu VERMnai YAH3FF HFFS!1E ENVIRUNMENTAL RADIHLOGICAL MHHiiHRING

SUMMARY

FOR THE PERIOD 12/28/78 - 12/31/79 MEDIUM: FISH UNITS: PC1/MG *ET INDICATOP STATIONS HIGHEST STATInN CON T ROL LOCAT]HNS RADIONUCLIDES MF4N. RANGE.AND

(;:0 ANALYSES) NOMINAL MEAN. RANGE,AND MEAN, RANGE,4ND (NON.ROUTINFlo LLD NO. DETFCTEDee SIA. NO. DETECTEDee NO. OFTECTEnee 9

BE=7 ( 6) 2 (=3.5 A 7.6)t t 11 ( 4.6 A 6.31E I (-4.2 1 2.11F 1

(-o.3 - 0.0)F t

( 0) (-2.5 - 1.1)E 2

• ( 0/ ele et 0/ 2)e et U/ 21e 3 ( 3.4 i .t)F 3 M-40 ( 63 5 ( 3.4 A 0)> 3 12 ( 3.5 A .o)E

( ol ( 3.3 - 3.5)E 3 ( 3.4 - 3.5)E 3 ( 3.3 - 3.5)E 5 et 4/ ele e( 2/ 2)e e( 2/ 2)*

C =51 ( 61 3.2E+0? (.t.4 A .5)E 2 21 ( 3.2. A 4.21E I ( 5.2 1 4.2)E I 0.8)E 2 (-1.0 - 7 3)E I

( 0) (-2.3 -

• ( 0/ 4)e *( 0/ 2)* *( n/ 21 NN-54 ( 61 2.eF-02 (-2.3 A 22.4)E .1 11 ( t.6 A 8)E o ( 2.4 1 4.4)E -1

( 0) (=6.9 2.7)E 0 ( 2.0 . 6.9)F .1 et 0/ 4)e *( U/ 2)* et o/ 21 1.6)E 21 ( 5.3 A 1)E o ( 5.3 A 1)E o C0=58 ( 61 2.oE-02 (-2.6 A o

( 5.3 5.4)F o

( 0) (-6.3 1.0)E o r.

03 et o/ ele *( 0/ 2)* *( 0/ 2)e FE=59 ( 63 3.nE+01 ( 2.4 A 1.3]E t 32 ( 3.7 A 2.5)E t (-7.7 1 2.3)E o

( 0) ( 5.0 - 62.0)E O (-1.J = 0.0)F 1

• ( 0/ 4)e et 0/ 2)* et 0/ 2).

CD-60 ( 61 2.0E-02 ( 3.8 A 2.9)E O 12 ( 4.3 A 4.0)F o (.t.2 i 1.5)E I 9.1)E o (-2.7 - 3)E t

( 0) (-2.8 =

• ( 0/ 4)* .

et 0/ 21e *( 0/ 2ie 61 6.7E+01 ( t.9 A 1.3)E 1 12 ( 3.2 A 1.01E 1 ( t.0 1 21.1)F 0 ZN=65 (

(-2.0 -

2.2)E

( o) (.l.a . 4.1)E I 1

• ( 0/ 4)* et 0/ 2)* et 0/ 2)*

ZR=95 ( 6) 4.0E=02 ( t.1 A 8)E 1 12 ( l.o A 1.3)F 1 (-8.0 1 27.1)E o 29.03E o (.5.5 - 1.9)F i

( 0) ( 5.7 - *(

et 0/ ele *( o/ 2)* 0/ 2).

e NON kOOTINE REFERS TO THE NUMHFR OF SFPARAlE MEASURFMENTS WHICH eERE G4FATFR THAN TEN (10) TIMES THE AVERAGE HACMGROUND FOR THE PERIOD OF THE HFPORT

• • THE FR4CTION OF SAMPLE ANALVSES YTELnING DETFCTAHLE MEASUREMENTS l

(i.E. >LLD) IS INDICATED MITHIN *( AND )*.

VEWMONT Y ANMF E OFFSliF ENVIDHNMENTAL HADIDLOGICAL MUNITONING Mn/05/16 FAGF fl

SUMMARY

FOR THF PERIOD 12/2m/78 - 12/31/79 CEDIUMt FISM UNITSI PCI/nn aET CADIONUCLIDES TNDICATOR SIATIONS HIGHEST STATION CHNINOL t oC AIIONS (ND. ANALYSES) NOMINAL MEAN. RANGE,AND MEAN, RANGE,AND " fen,W44GF,4Nn (NON. ROUTINE)* LLD NO. DETECIFha* STA. No. OETECTEHee 40 UFIECTE0ee EU-103 ( 61 2.0E=02 ( 3.0 A 7.3)E O 11 ( l.5 A 6)E 1 (-l.3 A t.4)F 1

( 01 (-1.2 - 2.1)E 1 (-2.6 - 1)E 1 et 0/ 4)* *( 0/ 2)* *( 0/ 2)*

OU-106 ( 6) 2 (=5.9 A 5.2)E 12 ( 4.6 A 9.7)E o (-5.4 A 5.M)E 1

( 0) (-2.1 - .t)E 2 (-l.1 = 0)F 2

• ( 0/ 4)e et 0/ 2)e et 0/ 2)*

I-131 ( 6) O. ( 2.2 A 5.41E t 21 (.5.2 A 1.A)E 1 ( 5.2 A 1.4)E 1

( 0) (-8.3 = ts.01E i ( 3.4 - 7.o)F 1

• ( 0/ 4)* a( 0/ 2)* et u/ 2)*

CS=134,( 6) 2.0E-02 ( 7.0 A 3.7)E O It (-1.1 A 4)E o (-7.2 A 4.5)F G

( 0) (=t.6 - 0.0)E I (=t.2 - 0.0)F 1 a( 0/ 4)* *( 0/ 2)e et o/ 2)e CS-137 ( 61 2.0E-02 ( 5.9 A 1.1)E 1 21 ( 4.3 A 3.3)E 2 ( 4.3 1 3.3)F 2

r. ( 0) ( 3.3 - 7.9)E I ( l.0 . 7.7)E 2 ( t.o - 7.7)F 2

'O et 4/ ele *( 2/ 2)* et 2/ 2)*

9)E t ( 3.2 A 1.5)E 1 ( t.9 i 3.6)E I RA-140 ( 6) 8.0E-02 ( 2.4 A it

( 0) ( 5.2 - 47.0)E O (-1.7 = 5.5)F t .

et 0/ 4)e et 0/ 2)e ef U/ 21e CE-141 ( 6) 4.0E-02 (-1.2 A 1.4)E 1 21 ( 1.8 A 8)E t ( l.H A 8)E 1

( 0) (=4.6 - 1.0)E i ( t.o - 2.5)F t

• ( 0/ 4)e et u/ 2)e et u/ 21e CE-144 ( 6) 2 ( 6.8 A 19.5)E o 11 ( 1.6 A 3.2)E I (-5.1 A 1)E 1

( o) (-3.5 - 4.9)E  : ( 5.1 - 0.016

• ( o/ eie et 0 /' 2)e et o/ 2).

TH-228 ( 6) 2.0E-02 ( l.9 A 9)E 1 It ( 2.7 A 1)E I (=3.4 A 7.4)F o

( 6.4 = 28.0)E D (-8.1 . 4)E I

( 0)

• ( 0/ 4)* e( 0/ 2)* *( o/ 21e a NON. ROUTINE REFFRS TO THE NUHHER OF SEPARATE MEASHHEMENIS HH{CH hERE GREATER THAN TEN (to) TIMES THE AVFHAGF RACMGHHUND FOR THE PERIOn OF INE HFPHWT

' ** THE FWACTION OF SAMPLE AN ALYSES VIEt nING nETECI AHLE ME ASUREME NTS (1.E. >LLD) IS INDICATED WITHIN et AND 1*.

______t_________________ _

_f __ __ _

OFFstTE ENvgWONMLNTAL WA0!OLOGICAL MUNITilWING 6p/05/16 paGE 12 VEWMONT TANEFE SUMMAWY FOW THF PERino 12/28/78 - 12/31/T9 MEDIUNI MILK UNITSI PC1/LITFW CADIONUCLinES INDICATOR STAT!HNS HIGNEST STATION CUNINOL LOCATIONS MEAN, RANGE.AND MEAN, RANGE,AND MFAN, RANGE,AND (NO. ANALYSES) NOMTNAL (NON. ROUTINE)* LL D No. DETECTEDee STA. NO. OFTECTE0** NO. OFTECTE0ee 32 89 ( 16) 4 ( 4.2 A 4.5)E .1 12 ( 7.6 A 8.7)E .1 ( 5.5 A 2.0)E 1

( 01 (.2.1 = 3.3)E 0 (.4.4 . 33.3)E -1 (-3.7 M 3.2)E

• 2

• ( 1/ 12)* *( 1/ 4)* et 0/ 4).

SR*90 ( 16) 8 ( 3.1 A .3)t 0 21 ( 4.5 A 9)E o ( 4.5 A 1)F 0

( 0) ( 1.9 . 5.1)E o ( 4. 3 = 4.7)E o ( 4.3 4.7)E 0 et 12/ 12)* *( 4/ 4)* e( 4/ 4)*

BE-7 ( 4A1 A.0E+01 (.2.2 A 14.6)E .1 21 ( 3.5 A 2.6)E o ( 3.5 A 2.6)E 3 2.5)E (.5.8 - 27.2)E o

( 0) (.2.0 - 1 et 0/ 36)* *( 0/ 12). et 0/ 12).

M.40 ( 48) 2.0E+02 ( t.4 A 0)E 3 13 ( l .4 A 0)E 3 ( l.3 A 9)E 3

( 0) ( 1.1 - 1.6)k 3 ( l.2 - 1.6)E 3 ( t.3 1.4)F 3

• ( 36/ 361e *(.12/ 12)e et 12/ 12).

CR.51 ( em) -1,0-100 (-l.2 A 1.4)E O 11 ( l.2 A 2.9)E o ( 5.4 A 33.116 1

( 0) (=l.8 . l.5)E (.t.5 - 2.4)E I m 1 c3 *( 0/ 36)* *( 0/ 12)* et 0/ 12)e MN.54 ( 4A) 8 (.4.5 A 191.2)E .3 21 ( 6.8 A 4.4)E -1 ( 6.6 A 4.4)E 1

( 0) (.t.9 - 3.1)L 0 (-1.2 3.4)F u

• ( 0/ 36)e et 0/ 12)* et 0/ 12).

CO.5n ( en) n. (.n.1 A 17.9)E -2 21 ( 2.6 A 3.0)E -1 ( 2.6 A 3.0)E -1

( 0) (.2.6 = 1.A)E o (-2.4 . 1.31E o

• ( 0/ 36). *( 0/ 12)e a( n/ 12)*

21 ( t.2 A 8)F 0 ( 1.2 A .M)E o FE-59 ( 4R) 1.0E+01 f.3.2 A 4.7)E .I

( 0) (.6.0 . 4.7)E O (=4.5 - 6.31E--o- .

et 0/ 36)* *( 0/ 12)* et 0/ 12).

CO.60 ( 48) 8 ( 3.7 A 23.7)E 2 12 ( 8.9 A 4.3)E -t ( 2.0 A 32.5)E 2 o

( 0) (.2.4 - 3.2)E o (.t.9 l.9)E

• ( 0/ 36)e et 0/ 12)* *( 0/ 12)* .

e NON. ROUTINE REFERS.TO THE NUMHER OF SFPAWATF MEASUWFMENTS nHICH WF4E GWEATER THAN TEN (101 TIMES THE AVEWAGE RACMGHOUND FOR THE PERIun OF THE WEPHWI

• • THE FR ACilON OF SAMPLF ANALYSES YTELotNG DETECIAHLE MEASuMEMENIS (f.F. >LLD) IS TNDICATED WITHIN *( ann Ie.

OFFSITE FNVIRONMENT AL R ADInLOGIC AL MUNiinulNG MQ/OS/th, PaGE 13 VERMONT YANXEF

SUMMARY

FOR TMF PERinn 12/2A/78 = 12/31/70 CEDIUMt MILE UNITSI PCI/LITEW RADIONUCL10ES INDICATOR S(AI!ONS HIGHEST STATION CONTROL LOCATIONS (hD ANALYSES) NOMINAL MEAN. RANGE,4ND MEAN,RANGF,AND MEAN. RANGE.AND (NON. ROUTINE)* LLD NO. DETECTFO** STA. NO. OETECTEDee 40 OFTECTEDee ZN=65 ( 44) *l.0=100 ( 9.2 A e.9)E -l 2' ( l.1 A 7)E o ( l.1 A 7)E u

( 0)

(=5.3 = 6.7)E o (-3.2 - 5.5)F u

• ( 0/ 36)* *( 0/ 12)*~ *( 0/ 12)*

ZR=95 ( 48) 1.0E*01 ( l.6 A 2.7)f -1 13 ( 8.5 A 4.7)E =1 ( 6.4 A 41.9)F -2

(=l.5 - 3.3)E a

( 0) ( 4.7 - 3.1)E O

• ( of 36)* *( 0/ 12)* *( d/ 12)*

CU-103 ( 48) M. (-1.1 A 2.0)E -l 11 ( 9.5 A 30.8)E 2 (-5.0 A 3.5)F -1

( 0) (.2.0 . 3.7)E O (-3.0 - 1.1)E o

• ( 0/ 36)* *( 0/ 12)* *( 0/ 12)*

RU.106 ( 48) A.0E+01 L 1.0 A 14.l?E -l 11 ( l.0 A 3.01E o (-3.2 A 2.6)E o

( 0) (=l.5 - 2.01E I (.2.4 = 7)F 1

• ( 0/ 36)* *( 0/ 12)* *( 0/ 12)*

I-131 ( 48) 5 ( l.8 A 61E .1 13 ( 2.2 A 8)E -2 ( 2.2 A 1.6)E -2

( 0) (=6.6 - 8.8)E ~2 (-4.6 = 12.7)f -2 y

>- *( t/ 30)* *( U/ 12)* *( 0/ 12)*

9 (-l.2 A .2)E o 12 (=9.7 A 3.5)E -1 (-l.3 A 3)E O CS-134 ( 48) 3)F o

( n) (-3.6 = 1. ale O (-3.2 =

• ( 0/ 36)* *( 0/ 12)* *( 0/ 12)*

CS-137 ( 48) 9 ( 4.1 A .2)E o 21 ( 8.6 A 1.3)E O ( 8.6 A l.3)F 0

( 0) ( l.5 - 67.7)E .I ( 9.5 = 189.0)E al ( 9.5 = 189.u)E -l

• ( 27/ 36)* *( 11/ 12)* *( 11/ 121e RA-140 ( 48) 1.5E*11 (-7.a A 3.7)E .I 21 ( 2.4 A M2.2)E -2 ( 2.4 A M7.2)F =2

( 01 (=7.3 = 4.3)E 0 (-6.8 - 1.8)E o

• ( 0/ 36)* *( 0/ 12)* *( 0/ 121*

CE=let ( em) 2.0E+01 (=3.2 A 3.0)E .I 11 (.2.7 A 7.n)E -1 (.s.6 A 5.7)F -l

( 0) (.3.4 - 4.91L 0 (-4.8 - 1.5)F 0

• ( 0/ 36)* *( 0/ 12)* *( 0/ 12)*

CE-lae ( 48) 8.0E+01 (-l.2 A 1.1)E o 13 (-3.3 A 17.6)E -1 (.5.5 A 16.4)F -1 1.7)E I (-l.1 - 6)f I

( 0) (-l.5 -

• ( 0/ 36)* *( 0/ 12)* *( u/ 12)*

• NON=NHUTINE REFFRS TO THE NUMRER OF SFPARAir dEASUHFMENTS MHICH kFNF GWF A TFW THAN TEN (10) TIMES THE AvFRAGF RACMGROUND FOR THE PERIHO OF 1HE REPORT

• • THE FRACTION OF SAMPLF ANALYSES YIELDING DE TECT AHLE MF ASUREMENIS (1.E. >LLD) IS INDICATFD MITHIN *( AND )*,

OFFSITE ENVIRONNINTAL #AD]HLOGICAL NUNITORING 60/05/16, PAGE 14 VE RMur47 YANNEF

SUMMARY

FOR THE PERIOD 12/28/78 . 12/31/T9 CEDIUMt MILM UNITS: PCl/LIIFH RADIUNUCLIDES INDICATOR STATIONS HIGHE ST ST ATInN CONINOL LOCATIONS MEAN, RANGE,AND MEAN, RANGE,AND ME AN, R A PAGE , A fJD (NO. ANALYSES) NOMINAL (NON. ROUT {NE)* LLD Nu. DETECTFD** SIA. NO. DETECTED ** NU. DETFCTEDee

- TH.228 ( em) 1.0E+01 ( 3.1 A 6)E O 13 ( 3.2 A 1.01E o ( 1.1 A 9)E o

( 0) (.6.3 12.9)E o (.e.M = 5.5)F o

• ( 1,/ 36)e et 0/ 12)* *( 0/ 12)*

e NON. ROUTINE REFFRS TO THE NUMRER OF SEPARATE MEASURFMENTS WHICH *FRE GREATEW THAN TEN (10) TIMES THE AVERAGE RACMGRouND FOR THE PERIHD He THE REPORT

• • THE FRACTION OF SAMPLE ANALYSES YTELDING DETECTABLE MEASUREMENTS (I.E. >LLD) IS INulCATED WITHIN e( AND )e.

N N

L-----.u--.u.-,- __.mI_ , , . _ , _ . , . , _ _ _ , _ _ _ . _ _ _ _ _ _ _ ____

VfBHONT VAN 3ff IJFF81TE ENW1RUNNENT AL RADIDLUGIC AL NUnt10R!NG 80/05/14, PAGF IS

SUMMARY

FOR THE PERIOD 12/2A/7A = 12/31/79 MEDIUMt SEDIMENT / SILT UNITS: PCI/MG DRV CADIONUCLIOES INnICATOR STATIONS HIGHEST STATION CUNTROI LOCATIONS (EU, ANALVSES) NOMINAL MEAN, RANGE,AND MEAN, RANGE,AND MEAN.RakGE.AND (NON.kouT]NEle LLO NO. DETECTFD** STA. NO. OF IEC TE D*

• AD. DEffCTEhe*

RE-7 ( 21) 2 ( 3.6 A 7.2)E I 12 ( l.5 A 1.1)E 2 ( 4.5 A lo.01E 1

( 1) (=4.7 - 7.5)E 2 (-1.5 - 7.5)E 2 (-3.9 - 4.01E 2

• ( 1/ 14)e *( 1/ 7)* et 9/ 7)e K=to ( 21) 5 ( l.1 A 1)E 4 12 ( l.3 A 1)E 4 ( l.o a .n)E 4

( 0) ( A.1 = 16.7)E 3 ( l.0 - 1.7)E 4 (, 8.7 11.8)E 5

• ( 14/ 14)e e( 7/ 7)e *( 7/ 7)e CK-51 ( 21) 3.7E+02 (=l.5 A 1.0)E 2 11 ( 3.2 A 10.1)E 1 (=S.2 & 13.1)F 1

( 0) (=8.6 - 3.1)E 2 (-5.9 - 4.1)F 2

• ( 0/ 14)e et 0/ 7)* et 0/ 7)e MN=54 ( 21) 2.0E-02 ( 5.1 A 5.3)E O 12 ( l9A 5)E 1 ( 5.2 1 3.3)E o

( 0) (-3.7 - 3.6)E I (.7.0 - 16.6)E O

• ( 0/ 14)* *( 0/ 7)* *( 0/ 7)*

CO-5A ( 21) 2.0E=02 (=8.6 A 4.5)E O 11 ( 4.2 A 5.2)E o ( l.3 A 8)E 1

( 0) (.4.4 - 1.5)E 1 (-5.1 = 2)F 1 p3 La *( 0/ nd)e *( 0/ 7)* *( 0/ 71*

FE=59 ( 21) 5.0E+01 ( 2.1 A l.3)E I 11 ( 2.H A 1.1)E I (-2.3 A 1.7)E I

( 01 (.9.9 . 10.7)E 1 (.8.3 - 3.6)F 1 a( 0/ 14)e e( 0/ 7)e *( U/ 71*

CO-30 ( 21) 2.0E-02 ( l.4 A 3.5)E o 12 ( 5.2 A 5.5)E o ( 2.6 a 37.h)E -1

( 0) (=2.2 = 1.3)E 1 (.l.5 1.7)E 1

• ( 0/ 14)e *( 0/ 7)e et 0/ 7)e ZN=$5 ( 21) 6.ME+01 (=6.9 A 10.8)E O 11 ( 2.0 A 7.9)E O ( 9.1 A 126.5)E =l

( 01 (=7.2 - 5.53E i (-5.6 - 4.5)E 1 et 0/ 14)e et 0/ 7). *( 0/ 7)e Z2=15 ( 21) 4.0E-02 ( 9.4 A lo.2)E o 11 ( 3.5 A 8)E I ( l.9 a 1.4)E I

( 0) (.e.4 . 7.8)L I (.2.6 - A 0)F 1 et 0/ 14)* *( 0/ 7)* *( 0/ 7)e e NON-kOUTINE RFFERS TO THE NUMRER OF SFP4PATE MEASUWFMENIS WHICH *FRE GWEATER THAN TEN (10) TIMES THE AVERAGE RACKGROUND FOR THE PERIOn OF THF RFPOWT

• • THE FRACTION OF SAMPLE ANALVSES YTELoING DETECIAHLE HEASUREMENTS (I.F. >LLD) IS THDICATED WITHIN e( AND 1e.

VAN 2EE OFFS!!E ENV!NONMENTAL NAO!OLOGTCAL MONTTHRING N0/05/th. PAGF th VEHMONT SUMMANY FOR THE PERIOD 12/28/78

• 12/31/79 MEDIUM 8 SEDtMENT/ SILT UNITS: PC1/kG nRY GADIONUCLInES IN0!CATOR STATIONS HIGHEST STATInN C084 TROL t oC ATIO 45 (ND, ANALYSES) NOMINAI, MEAN, RANGE,AND MEAN, RANGE,4ND MFeN, RANGE,AND (NON. ROUTINE)* LLO No. DETECTEDee STA. NO. DETECTEDet NO. UFIFCTED**

CU-103.( 21) 2.0E=02 (=t.2 A .5)E I 12 (=5.5 A e.3)E o (=M.2 1 3.3)E 0

( 0) (=5.7 = 1.5)E t (-l.7 - 51E 1

• ( 0/ 14)e et 0/ 7)* *( 0/ 7)*

CU.tn6 ( 21) 7 ( 8.5 A 5.7)E 1 12 ( 1.9 A 9)E 2 ( 7.5 A 4.u)E t

( 0) (=2.0 - 6.0)E 2 (-4.3 - 26.01F t et 0/ 14)e *( 0/ 7)* et U/ 7)e

!=131 ( 21) 0 (.4.8 A 7.4)E 2 12 ( 9.7 A 719.8)E o (-1.1 A 7)E 3

( 0) (-6.5 = 5.0)E 3 (-4.1 - 6)E 3 et 0/ 14). *( 0/ 7)e .( 0/ 7).

CS=134 ( 21) 2.nE.n2 (=5.8 i 5. - O 11 ( 5.1 A 6.9)E O (-l.o i 3)F 1

( n) (-3.4 - 2.4)E 1 (-2.2 - 0.o)E 1

• ( of tale et 0/ 7)* et 0/ 7)e CSal37 ('21) 2.0E-02 ( 2.4 A .3)E 2 12 ( 3.2 A 3)E 2 ( 2.5 i 2)E 2

( 0) ( t.3 - 4.5)E 2 ( 2.5 - 4.5)E 2 ( t.5 - 3.2)E 2 g3 s, et 14/ 14)* *( 7> 7). et 7/ 7).83-140 ( 21) 0.0E-02 (=3.0 A 1.8)E 2 11 (-l.8 A 1.0)E F (=6.7 1 2.3)E 2

( n) (=2.4 = 5)E 3 (-1.7 n.0)E 3 a( 0/ tela e( 0/ 7). *( 0/ 7)e CE=141 ( 21) 0.0E=02 ( 3.5 A 1.2)E I 12 ( 3.7 A 2.3)E I ( 9.7 A 17.7)F 0

( 0) (-5.7 = 9.7)E t '(-6.7 - 5.8)E t

• ( 0/ 14)e *( 0/ 7)* et 0/ 7)*

CE-144 ( 21) 2 ( 2.9 A 4.8)E 1 12 ( 9.8 A 8.9)E t ( 2.4 A 1.8)E 't

( t) (~t.3 - 6.0)E 2 (=8.5 - 60.1)E I (-2.2 - II.0)E I

• ( 1/ 14)e et. 1/ 7)* et 0/ 7)e TH-228 ( 21) 2.0E-02 ( 7.4 A 6)E 2 12 ( 9.6 A 3)E 2 ( 6.H A 4)F 2

( 0) ( 4.0 - to.8)E 2 ( 8.5 - to.8)E 2 ( 5. 3 - 8.3)f 2 e( 14/ tale *( 7/ 7)* et T/_ 7)e

• NON= ROUTINE REFERR TO THE NUMMER OF SFPARATE PEASURFMENIS WHICH kERE GREAltr:

THAN TEN (101 TIMES THE AVERAGE RACKGROUND FOR THE PERInn OF THE REPORI

• • THE FRACTION OF S AMRLE ANALYSE S VIELOING DETECT AHLE HE ASUREMENIS (I.E. >LLO) IS INDICATED wITHTN *( AND )e.

OFFSITF FNVISONMENTAL Dan!0 LOGICAL HUNTTONING A0/05/l6 PAGE 17 V[HMONT YANKEE ,

SUMMARY

FOR THE PERIO3 12/28/78 = 12/31/79 MEDIUMt VEGEIATTON . AouATIC UNITSI PCI/nG mEi 1

02DIONUCLIDES INDICATOR STATIONS HIGMEST STATION CUNIROL LPCATIONS (NO, ANALYSES) NOMINAL FEAN, RANGE,AND MEAN.RANGEeANn MEAN, RANGE.AND (NON.N00 TINE). LLO NO.' DETECTED ** STA. Nn. OETECTED** NH. DE TECTEbee BE.7 ( e) .2 ( 3.2 A e.t)E I 11 ( 3.2 A 6.1)E t ( t.t A 6.a)E I

( ol (.3.0 - 9.3)E 1 (-5.3 - 7.5)E  !

• ( 0/ 2)e *( 0/ 2)* et 0/ 2)*

K=00 ( ,a) 5 ( 3.7 A 6)E 3 11 ( 3.7 A 6)E 3 ( 2.2 A 6)E 3

( 0) ( 3.0 - e.1)E 3 ( 3.0 - 4.3)E 3 ( l.5 - 2.M)E 3 et 2/ 2)* *( 2/ 2)* *( 2/ 2)e ,

C;=51 ( e) -l.0 100 (-2.0 A t.3)E I 12 (-l.1 A 4.5)E I (-1.1 A 4.5)F 1

( 0) (.3.3 - 0.0)E t (=5.6 -

3.3)E t et 0/ 21 *( 0/ 2)* e( n/ 21e MN.53 ( a) 2.oE.02 (-6.0 A 4.5)E 0 12 (.5.2 A 43.2)E -1 (-5.2 A 43.2)E .1 3.A)F 0

( 0) (.t.o - 0.0)E t (.a.6 -

• ( 0/ 2)* *( 0/ 2)* et 0/ 2)*

,CO.58 ( al 2.0E.02 (.1.3 A .3)E O 11 ( t.3 A 3)E o (-4.7 i 1.2)E o

( 61 (.1.6 - 0.0)E O (-5.9 - o 0)E O

.g

. Ln *( 0/ 2)* *( 0/ 2)* *( 0/ 2)e FE 59 ( el 3.0E+01 (=6.7 A 16.3)E o 11 f.6.7 A 16.3)E o (-2.1 A 1.4)E t

( 01 (-2.3 = 1.0)E I (-3.5 - 0.01E t

• ( o/ 2). e( 0/ 2)* *( 0/ 2)*

1.5)E o C0=10 ( 4) 2.0E-02 ( t.2 A .2)E D 12 ( 2.0 A t.51E O ( 2.0 A

( 0) ( 1.0 = 1.5)E o ( 5.8 - 35.01E .I

• ( 0/ 2)e et 0/ 2)* et 0/ 2)*

ZN=65 ( 4) -1.0-100 (.2.1 A .2)E 1 12 (.9.1 A t.9)E o (-9.1 A 1.9)E o

• 0) (=2.3 0.0)E 1 (-1.1 - 0.0)E i

• ( 0/ 2)e *( 0/ 2)* et 0/ 2)*

Z%.;5 ( a) a.0E=02 (.6.0 A 3.01E o it (.6.0 A 3.01E o (-6.3 A 9.7)E D

( 0) (=9.0 - 0.0 F 3 (-l.e - 3)E t et o/ 21e *( 4/ 2)* *( 0/ 2)*

e NON.HOUTINE REFFRS TO THE NUMnER OF SEPARATF MEASUWEMEN(S NHICH eERE GREATER THAN TEN (10) TIMES THE AVEWAGF RACMGNOUND FOR THE PERInn OF THE WEPOWI

• • THE FRACTTUN OF SAMPLE ANALYSES VIELotNG DETECT 4HLE MEASURFMENTS (1.E. >LLO) IS TNDICATED WITHIN e( AND )*.

e

V E R MilN T VANXEE OFFSITE ENW140NMENTAL RADIOLOGICAL HUNITORING 80/0$/16 PAGF iM SUMMANY FOR THF PERIno 12/28/7s = 12/31/79 MEDIUMS VEGETATION = AQUATIC UNITS PCl/MG *ET CADIONUCLinES INDICATOR STATIONS HIGHE ST STATION CONTROL LOCATIONS (NO, ANALYSFS) NOMINAL MEAN, RANGE,AND MEAN. RANGE,AND MEAN, RANGE,AND (NON.HOUTINE)* LLD NO. DETECTFo** STA. NO. OFTECTEp** NU. DF IECTEDa

• CU-103 ( 4) 2.0E=02 (=2.7 A 3.0)E 0 12 ( t.9 A 6)E o ( t.9 A 6)F 0

( 0) (-5.7 = 4)E o ( l.3 - 2.5)E o

• ( 0/ 2)* *( 0/ 2)* *( 0/ 2)*

CU-106 ( 4) 2 (-7.4 A 5.8)E 1 12 (-8.9 A 9)E O (=M.9 A 9)E o

( 0) (=1.3 0.0)E 2 (-9.7 - 0.0)E o

• ( 0/ 2)* *( 0/ 2)* *( 0/ 2)*

23.8)E -1 11 ( 6.7 A 28.8)E -1 (=4.9 A 14,4)F 0 I-131 ( 41 0 ( 6.7 A

( 0) (=2.2 = 3.6)E O (-1.9 - 1.0)E 1

• ( 0/ 2)* *( 0/ 2)* *( 0/ 2)*

CSal34 ( 41 2.0E-02 (-2.3 A 9)E o 12 ( 7.4 A 5.4)E -t ( 7.4 A 5.4)E -1

( 0) (-3.3 - 0.0)E o ( 2.0 12.4)E -t

• ( 0/ 2)* *( 0/ 2)* *( 0/ 2)*

CS-137 ( 4) 2.0E*02 ( 3.9 A 8.7)E O 11 ( '3.9 A 8.7)E O (-9.0 A 26.0)E -t ba ( 0) (-4.7 - 12.6)E o (-3.5 - 1.7)F 0

' C' *( 0/ 2)* *( 0/ 2)* *( 0/ 21*

8A-140 ( 4) A.0E=02 (=2.8 A 12.2)E 0 12 ( 5.4 A 22.6)E O ( 5.4 A 22.6)E o

( 0) (-1.5 = 9)E t (-1.7 - 2.H)E 1

• ( 0/ 2)* *( 0/ 2)* *( 0/ 21*

CE=t41 ( 4) 4.0E.02 ( 3.8 A 4.1)E o 12 ( 4.0 A 2.8)E o ( 4.0 A 2.8)E o

.3)E ( t.2 - 6.83E o

( 0) (=7.9 o

• ( 0/ 2)* *( 0/ 2)* *( 0/ 2)*

CE=144 ( 4) 2 ( 6.8 A 3.4)E 1 11 ( 6.8 A 3.41E 1 (.8.7 A 16.8)E O

( t) ( 3.4 - 10.2)E 1 ( 3.4 - to.2)E i (-d.5 - 8)E t

• ( t/ 2)* *( t/ 2)* *( 0/ 2)*

1.3)E t 11 ( 6.9 A 1.3)E I ( l.8 A 7)E I TH-228 ( al 2.0E =02 ( 6.9 A

( 2) ( 5.6 - 8.7)E I ( 5.6

• 8.2)E 1 ( l.1 - 2.53E 1

• ( 2/ 2)* *( 2/ 2)* *( 0/ 2)*

J

• NON-ROUTINE REFERS TO THE NOMMER OF SFPARATF MEASURFMENIS NHICH *ERE GkEAIER THAN TEN (to) TIMES THE AVEHAGE BACNGROUND FON THE PERIDO OF THE HFPONT

• • THE F R ACTION OF SAMPLE ANALYSES VIELotNG DETECTAHLE HEASUREMFNTS (I.E. >LLD) IS TNDICATED MITHIN *( AND )*.

i

80/05/16 PAGF 19 VECMONT VANEF OFF SITE ENVIRONME NT AL RanIOLOGIC AL MUNITORING

SUMMARY

FOR THE PERIOD 12/28/78 . 12/31/79 HNITS: PC1/MG aET . ~~..

MEDIUM: VEGETATION - TENRESITAL CA7tDNUClinES. INDICATOR STATIONS HIGHEST STATION C ura T Hut LHCATIONS HEAN, RANGE,AND MEAN,WANGE,Akh MFAN, RANGE,AND (NO. ANALYSES) NOMINAL (NON. ROUTINE 1* LLD NO. DETECTro** STA. NO. DETECTED ** No. UE TE C TEf>* *

.53E 15 ( 4.2 A 1.7)E 3 ( 2.2 A .M)F 3 CE.7 ( 31) 2 ( 2.4 A 1

( n) ( 2.8 . 93.2)E 2 ( l.1 7.1)E 3 ( 2.5 - 79.01F 2

• ( 21/ 21)* *( 3/ 3)* *( N/ 10)*

K 40 ( 31) .5 ( 4.5 A 4)E 3 13 ( 5. 7 A 1.2)E 3 ( 4.7 A 5)F 3

( 0) ( 5.5 91.5)E 2 ( 3.3 9.2)E 3 ( l.7 - 6.9)E 3

• ( 21/ 21)* *( 4/ 4)* *( 10/ 10)*

CC.51 ( 31) =1.0.lon (.3.4 A 2.0)E i 22 ( 4.2 A 2.8)E I (.5.6 A 23.2)E D

( 0) (.2.0 = 1.m)E 2 (.l.8 . 1.0)E 2

• ( 0/ 21)* *( 0/ 3)* *( o/ 10)*

MN=54 ( 31) 2.nE.02 ( 7.1 A 23.3)E .1 14 ( 9.3 A 1.6)E O ( 4.7 A 2.4)E o

( 1) (.2.3 2.0)E I (.6.M . 17.1)E O

• ( 1/ 21)* *( 0/ 3)* *( n/ 141*

CO.5R ( 31) 2.nE.02 ( 9.1 A 15.3)E =1 22 ( 2.3 A 2.11E I ( 2.2 A 7.6)E o do ( n) (-l.1 1.41E 1 (.2.3 - 6.4)E 1

'd *( 0/ 21)* *( 0/ 3)* *( 0/ 10)*

FE=59 ( 31) 3. 0 E + 0'l (.5.9 A 4.4)E o 10 ( 2.0 A 2.01E I (.6.1 A 7.1)E n

( 0) (=5.5 5.9)E 1 (.4.6 4.2)E 1

• ( 0/ 21)* *( 0/ 3)* af o/ 10)*

C0=60 ( 31) 2.0E.02 ( 2.6 A 6)E l 21 ( 5.8 A 4.4)E 1 ( 4.0 A 1.8)F 1

( 0) (.2.5 7.6)E I ( 6.6 190.0)E o ( 6.0 . 190.n)E o

• ( 3/ 21)* *( t/ 4)* *( 3/ 10)*

8)F 1 1% ( l.8 A 1.2)E I ( l.4 A 7)F 1 ZN.65 ( 31) .l.0=100 ( l.1 A l

( 0) (.2.5 4.7)E 1 (.l.4 . 5.5)F

• ( 0/ 21)* *( 0/ 3)* *( 0/ 10)*

Z0 95 ( 31) 4.oE.02 (.l.2 A 6)E 1 23 ( 4.0 A 3.91E o (.4.1 A 3.6)F o

0) 3.4)E I (.2.6 . l.2)E l

( (.8.6

• ( 0/ 21)* *( 0/ 3)* *( o/ 10)*

• NUH.HOUTINE HEFFRS TO THE NUMRER OF SEPARATF MEASukFMENIS mHICH hFHE GREATER THAN TEN (10) TIMES 1HE AVERAGE HACNGHOUND FOR THE PEklon OF THE REPORT

• • THE FRACTION OF SAMPLE ANALYSES VIELnING DETECTARLE MEASUREHENTS (I.E. >LLD) IS INDICATED NITHIN *( AND )*.

. . =

VERMONT VANNEE OFFSITE ENVIPUNMENTAL RADIOLOGICAL MUNITORING 80/05/t6 PAGF 20

SUMMARY

FOR THE PERIOD 12/28/7A - 12/31/79 MEDIUM VEGETATION = TERRESTIAL UNITSg PC1/dG eET RADIONUCLIDES INDICATOR STAT!HNS HIGHEST STATION CONIROL LOCATIONS (NO, ANALYSES) NOMINel MEAN, RANGE,AND MEAN,RANGF, ann DEAN,4ANGF.AND (NON.ROUTINF)* LLO No. DETECIFD** STA. NO. OFTECTEnee NO. DFIECTEDee CU-103 ( 31) 2.0E-02 ( l.3 A 2.6)E O 13 ( ~ l.4 A .StF t ( t.H i 7.5)E o

( 0) (.2.4 = 2.5)E t (=t.3 = 1.2)E I

• ( 0/ 21)* *( 0/ 4)e e( 0/ 10)*

Cu-306 ( 31) 2 ( ?.3 A 1.9)E 34 ( 6.4 A 4.3)E t ( 2.6 1 3.3)E

( 0) (-l.3 2.01E 2 (-1.T = 7.53E 2 et 0/ 211e *( 0/ 3)e et o/ to).

I.13 ( 31) 0 (=t.3 & t.2)E 1 12 ( 2.9 A 3.2)E t ( 7.3 i 3.7)F 0

( 0) (.t.7 1.2)E 2 (-l.0 -

3.5)F I

• ( 0/ 21)e *( U/ Ale et n/ 10).

CS-134 ( 31) 2.0E=02 (.6.4 A 2.1)E O 22 ( 5.0 A 7)E O (-4.6 1 3.a)E D

( 0) (.3.0 . .7)E t (-2.9 . 6)F t

• ( 0/ 21)* *( 0/ 3)e et o/ 10)e CS=t37 ( 31) 2.0E-02' ( 7.7 A 1.5)E i 14 ( t.7 A 61E 2 ( 5.7 i 1.4)E t ha ( 0) (.4.9 272.0)E O ( 6.4 - 27.2)E I ( t.5 - 145.03E o O *( 14/ 21)e *( 3/ 3)* e( 7/ tule BA-140 ( 31) M.0E=02 (-1.5 A 6)E t 22 ( 9.2 A 17.8)E O (-S.O 1 6.1)F 0

( 0) (=7.9 - 2.1)E t (-2.4 . 4.4)E 1

• ( 0/ 23)* *( 0/ 3)* *( o/ 10)e CE-141 ( 31) 4.0E=02 ( 5.8 A 3.9)E o 13 ( t.7 A 61E I (-4.3 & 3.5)E o

( 0) (.3.5 - ,3.2)E 1 (-2.6 - 1.4)E 1

• ( 0/ 2tle et 0/ 4)e et o/ to)e CE-144 ( 11) 2 ( 5.5 A t.1)E 1 13 ( 9.5 A 3.6)E 1 ( 3.4 i 1.6)E t

( t) (-3.2 18.4)E I ( 2.4 = 18.4)E 1 (.5.4 -

to.2)E I

• ( t/ 21)e *( 1/ 4)e e( 0/ to)*

TH-225 ( 31) 2.0F.02 ( 7.8 A 1.4)E 1 to ( t.4 A 3)E 2 ( 1.0 i 2)F 2

( 0) f*S.R . 20.t)E I ( 8.9 - 17.71E t ( l.o . 25.7)E t

• ( 5/ 21). *( 2/ 3). et 4/ to).

6 NON-ROUTINE HFFERS TO THE HUNHER OF SFPARATE MEASUREMENIS WHICH >FRF GHE A TER THAN TEN (10) TIMES THE AVERAGE HACNGROUNo FOR THF PEkl00 OF THE REPORT en THE FWACTION OF S4MPLE AN ALYSE S VIEtntNG nETECTAHLE MEASUREMENTS (I.E. >LLD) IS INnicATED wlTHIN a( ANp je,

YANNEF flFF SI TE ENv tRONMENT AI RADlHLOGICat HUNITORING 80/05/16 PAGE il VENHONT SUMMANY FHW THE PERIOD 12/28/78 - 12/31/79 KEDIUM WATER - GWOUND UNITds PCI/LITEN CA3IONUCL10ES INDICATOR STATIONS HIGHF ST ST ATION CONTROL LorATIHNS HEAN', RANGE,AND MEAN,WANGE,AND HEAN RANGE,AND (NO, ANALYSFS) NOMINAL (NON. ROUT]NEle LLD NO. DETECTED ** STA. NO. DETECTFDee h0. DETECTED **

G%-3 ( 16) 9 ( l.0 A 1)E I 13 ( t.4 A 1)E I ( l.3 A 7)E d

( 61 ( 3.5 - 15.9)E o ( t.1 - 1.61E t (-9.9 - 20.5)E -t

• ( 12/ 12)* *( 4/ ele *( 3/ 4)*

SE=7 ( 16) n.0F+01 ( t.6 A 2.7)E o 12 ( 9.6 A 4.6)E 0 ( 7.1 A 5.0)E o

( 4.9 - 221.0)F -l

( 0) (=1.6 - 2.01E I

• ( 0/ 12)e *( 0/ ele e( I/ 4)e o 21 ( 8.5 A 17.1)E o ( A.5 A 17.8)E o E-40 ( 16) 2.0E+02 ( 4.3 A 4.0)E l

( 0) (=2.2 - 3.0)E I (-4.2 - 2.9)E

• ( 0/ 12)e et 0/ 4)e et n/ 4)e C;-51 ( 16) 1.7E+01 (-7.3 A 2.3)E O 21 ( 4.0 A 3.6)E o ( 4.0 A 3.6)F 0

(-3.5 = 13.5)E 0

( 0) (-l.7 - 1.1)E I et 0/ 121e *( 0/ 4)e et 0/ 4)e MN-54 ( 16) 8 (=5.2 A 3.11E -1 21 ( 6.0 A 4.5)E -1 ( 6.0 A 4.5)F -1

( 0) (=2.8 7)E 0 (-H.t - 194.0)t =2 oo 43 *( 0/ 12)e e(. 0/ ele *( 0/ 4).

C0=58 ( 16) n. ( t.6 A 3.1)E =1 12 ( 7.2 A 7.2)E -t ( 2.5 A 7.3)F -1

( 0) (-1.3 = 2.3)E o (-l.5 - 2.0)E O

• ( 0/ 12)e *( 0/ 4)* ef 0/ 4)e FE-59 ( 16) 1.0E+01 (-2.9 A 5.8)E .1 21 ( 6.4 A 6.4)E =l ( 4.4 A 6.4)E .I

( n) (-3.3 = 2.9)E O (-8.9 - 19.7)F -1 et 0/ 12)* et 0/ ele *( u/ 4).

CO-10 ( 16) R. (-l.9 A 3.3)E -t 13 ( 4.8 A 3.51E -1 ( 2.4 A 6.2)E -1

( n) (.2.3 - 1.5)E o (-1.5 - 1.4)E o

• ( 0/ 121e *( 0/ 4)* .( 0/ ele ZN-15 ( 16) 4 (-l.7 A l.9)E O 21 ( A.5 A 15.3)F at ( 8.5 A 15.3)E -1

( 0) (-l.H - .s)E t (.2.6 - 4.n)E O ef 0/ 12)* *( 0/ 4)e e( n/ 4).

4 NON.HOUTINE REFFRS TO THE NilHRER OF SFPANATE HEASUNEMENIS WHICH aFRF GWEATFH THAN TEN (10) TIMES THE AVERAGF R ACmGROUND FOR THE.PEWlOD OF THF RFPOH1

• • THE FRACTION OF S AHRLE AN ALYSES YTELDING OETECI Afit E MEASUREMENTS (I.E. >LLD) Is TNnICATED WITHIN *( AND )*,

VERMONT VAN 2EF OFFSITE ENVIRONMENTAL BAnlOLOGICAL MUNTTORING M0/05/lo. PAGE 22

SUMMARY

FOR THE PERIOD 12/28/78 - 12/31/79 MEDIUM: WATER - GROUND UNITSg PCl/ LITER CADIONUCLIOES INDICATOR STATIONS HIGHEST STATInN CONTROL IUCATIONS (NO, ANALYSES) NOMINAL MEAN, RANGE,AND ' HEAN,HANGE,AND ME*N,WANGE,AND (NON ROOT {NE)* LLD NO. DETECIED** STA. NO. OFTECTEDa* NO. DFTFCTEDa*

21 1.1)E O ( l.2 A l.9)E o ZA=15 ( 16) 1.0E+01 ( l.4 A 49.7)E .2 ( l.2 A

( 0) (=3.6 = l.9)E 0 (-1.4 - 3.n)F 0

• ( 0/ 12)* *( 0/ 4)* *( 0/ 4)*

KU-103 ( 16) 8 (.3.7 A 3.1)E -1 13 ( 7.9 A 59.9)E =2 (-7.H i 8.2)E .I

( 0) (-2.2 - 1.a)E O (-3.2 = 8)E o

• ( n/ 12)* *( 0/ 4)* *( 0/ 4)*

CU-186 ( 16) A.0E+01 ( 1.6 A 2.2)E o 12 ( 6.7 A 3.3)E 0 (-3.4 A 3.3)E u

( 0) (=1.1 - 1.1)E i (-1.3 - 2)E I

• ( 0/ 12)* *( 0/ 4)* *( 0/ 4)*

I-131 ( 16) 0, ( 2.7 A 5.3)E -1 21 ( l.6 A 8)E n ( l.6 A 8)E O

( 01 (=2.6 = 4.1)E O ( F.I = 367.0)E =2

• ( 0/ 12)* *( 0/ 4)* *( 0/ 4)*

CS-134 ( 16) 9 (.3.3 A 1.5)E O 21 (-7.2 A 4.8)F -l (-7.2 A 4.8)F 1

( 0) (.l.6 - .2)E 1 (-1.4 - 7)F 0 v3 C3 *( 0/ 12)* *( 0/ 4)* *( 0/ 4)*

CS-137 ( 16) 9 ( 2.8 A 7.6)E .1 11 ( 4.9 A 6.1)E -1 (=1.1 A 5)E o

( 0) (=1.0 = 1.9)E o (.2.0 - u.0)E o

• ( 0/ 12)* *( 0/ 4)* *( 0/ 4)*

SAal40 ( 16) 1.5E+01 ( 3.7 A 2.7)E -1 12 ( 8.3 A 3.1)E -l ( 2.7 A 7.4)E -l

( 01 (=1.2 - 1.6)E O (-1.1 - 2.2)E O e'( 0/ 12)* *( 0/ 4)* *( 0/ 4)*

12 ( 7.3 A 7.0)E al (-l.7 A 9)E O CE=101 ( 16) 2.0F+01 ( 2.9 A 4.1)E -1 0)F 0

( 0) (-l.H - 2.6)E O (-4.3

• ( 0/ 12)* *( 0/ 4)* *( 0/ 4)*

CE-144 ( 16) 8.0E+09 (.2.3 A 2.3)E o 13 ( 6.S A 3.8)E O (-l.6 1 3.5)F 0

( 0) (.l.0 - 1.5)E I (-1.0 = 5)F 1

• ( 0/ 12)* *( 0/ 4)* *( 0/ 4)*

TH-228 ( 16) 1.0F*01 ( 3.1 A 1.6)E o IP ( 9.3 A 2.2)E 0 ( 2.7 A 22.3)E -l

( 0) (=3.9 = 13.2)E o ( 3.5 = 13.2)E o (.5.1 - 4.1)F 0

• ( t/ 12)* *( t/ 4)* *( 0/ 4)*

1. NON=WHitTINE REFENS TO THE NUMRER OF SEPARATE HEASHRFMENTS WHICH >FHF GREATER THAN TEN (10) TIMES THF AVE R AGE H ACMGHOUND F0H THE PER]On OF IHF HFPORT

• • THE FRACTION OF SAMPLE AN ALVSFS YIELDING DE TECT AHL E PE A3H8FHEN15 (T.F. >LLD) IS IN0!CATED >ITHIN *( AND )*,

A0/05/16 PAGF 23 VE3MONT YAN3FE OFFSIIF ENVIRONMENTAL RADIDLf1GICAL NUNITORING

SUMMARY

FOR THE PERIOD 12/2A/7A . 12/31/79

MEDIUM WATER = GROUND UNIT 8

PC1/LIIFR INDICATOR STATIONS HIGHEST STATInri CUNIROL LOCATIONS C ADIONUCL IhE S MEAN. RANGE,AND MEAN,HANGE,AND MEAN, RANGE,4ND (NO. ANALYSES) NOMINAL NO. OE TEC TED**

(NON. ROUTINE)* LLD NO. DETECIED** STA. HO. DFIECTEDe*

H.3 ( 16) 9.0E+ot ( 6.0 A 3.4)E I 11 ( t.3 A 61E 7 ( 5.9 A 23.A)E O

( 0) (.t.3 7.9)E 2 (.5.A .

5.7)E 1

• ( 0/ IP)* *( 0/ 4)* *( o/ ela

• NON.RuuTINE REFFRS TO THE NUHHER OF SEPARATE MEASUREMENTS WHICH *ERE GREATER THAN TEN (101 TIMES THF. AVERAGE RACMGROUND FOR THE PERIOD OF THE HEPONT

• • THE FRACTION UF SaHPLE AN ALYSES YIELDING DETECT ABLE ME ASUREMENTS (1.E. >LLD) IS INDICATED WITHIN *( Ag3 )*,

w i

>=

4

HFFSITE FNVIRONMENTAL RADIOLOGICAL HUNITORINC 60/05/16 PAGE 24 VERMONT V A'O E E

SUMMARY

FilR TME PERlun 12/28/7A - 12/31/79 HEDIUH1 WATER = RIVER HNITS: PCI/ LITER CADIONUCLIGES INDICATOR STATIONS HIGHEST STATION CONTROL LOCATIONS MEAN, RANGE,AND MEAN. RANGE AND MEANep4NGEeAND (NO. ANALVSES) NOMINAL (NON. ROUTINE)* LLD NO. DETECIFD** STA. No. DETECTED ** NO. OFIFCTEDa*

G;-R ( 36) 9 ( t.7 A 232.2)E -2 12 ( 2.2 A 2)F 0 ( 2.1 A 2)E o

( 0) (.5.3 - .5)E 1 ( t.4 - 3.21E o ( a.a . 33.3)E .1

• ( 23/ 24)* *( 12/ 12)* *( 10/ 12)*

BE-7 ( 36) 8.0E+01 ( t.3 1 1.7)E o it ( t.e A 2.41E 0 ( F.7 i 15.3)F -1

( 01 (-9.2 - 20.6)E o (-7.2 - A.1)F 0

• ( 0/ 24)* *( 0/ 12)* *( 0/ 12)*

K-C0 ( 36) 2.0E+02 (-3.2 A 4.2)E 0 11 (-2.3 A 4.6)E 0 (-4.0 1 5.8)E o

( u) (=6.4 - 2.6)E I (-4.6 - 2.7)E I

• ( 0/ 24)* *( 0/ 12)* *( 0/ 12)*

C%-Si ( 36) 1.7E+01 ( 5.1 A 15.2)E -1 11 ( 3.3 A 1.5)E o (-9.5 1 26.7)E =l

( 0) l.1)E I (-1.7 1.2)E t

(.l.5

• ( 0/ 24)* *( 0/ 12)* *( 0/ 12)*

MN=54 ( 36) 4 (.2.8 1 1.4)E =t 21 (**** A 28.7)E ~2 (**** 1 28.7)E =2

( 0) (=2.0 = .n)E o (-2.0 - 2.2)E o N$

• ( 0/ 24)* *( 0/ 12)* *( 0/ 12)*

CO.58 ( 36) m. (-1.7 A 2.1)E -l 11 ( 6.9 A 17.9)E .2 (-1.2 1 2.6)F -1

(=t.7 - t.2)F 0

( 01 (-2.7 - 1.5)E o

• ( 0/ 24)* *( 0/ 12)* p( 0/ 12)*

FE=59 ( 16) 1.0E+01 (-2.4 A 4.9)E .1 11 (.7.2 A 57.6)E .2 (-7.9 i 5.1)E -l

( 0) (.6.3 - 5.2)E o (-4.2 - 2.5)E o

• ( 0/ 24)* *( 0/ 12)* *( 0/ 12)*

CD.60 ( Jh) 8 (=3.9 A 2.9)t .t 21 ( l.3 A 2.6)E -1 ( !.3 1 2.6)E -l

( 0) (.3.1 . 2.2)E D (-1.5 - 1.5)E o

• ( 0/ 24)* *( 0/ 12)* *( 0/ 12)*

ZN=65 ( 36) 4 (=3.5 A 3.7)E -t 21 ( 4.2 A 3.7)E -1 ( 4.2 1 3.7)E -1

( 0) (.4.6 - 3.0)E o (-1.4 . 7.6)F 0

• ( 0/ 24)* *( 0/ 12)* *( o/ 12)*

• NON=RHUTINE NEFERS TO THE NUMMER OF SFPARATE MEA 3HRFHENIS WHICH >FPF GREAIFW THAN TF N (10) TIMES THE AVEkAGE HACNGwnHND FHR INE PEN!Hn OF THE REPHWT

• • THF FWACTTON OF SAMPLE ANALYSES VIELDING DETECT *HLE PEASUREMENTS (I.E. >LLD) IS INb1CATED WITHIN *( AND 1.

VE MONT VANNEE OFFSITE ENVIGONMENTAL RADIOLHGICAL MUNITOPING M0/05/16 PAGF. 25

SUMMARY

FOR THF PERIOD 12/2A/7A = 12/31/79 MEDIUMS >ATFR - RIVER UNITS: PC I /L I TE R CADIONUCLIDES INDICATOR SIAilONS HIGNEST STATION CONTROL LOCATIONS (NO, ANALYSES) NOMINAL MEAN, RANGE #4ND MEAN, RANGE,AND MEAN,RANGF,AND (NON ROUTINE)* LLD NO. DETECTFDee STA. NO. DFTECTE0*e NH. DETECTEDee Z2=05 ( 36) 1.0E+01 ( P.5 A 2.631 -1 12 ( 5.4 A 2.1)E =t (.2.5 A c.4)F .1

( 0) (.2.4 - 2.9)E o (-2.5 1.3)E o

• ( 0/ 24)e *( 0/ 12)e et o/ 12) e RU-103 ( 36) 8 ( 5.9 A 24.5)E .2 12 ( 3.5 A 4.01E -1 ( t.2 1 3.7)E -1

( 01 (-1.7 - 2.6)E o (-1.6 - 3.1)E o

• ( 0/ 24)* *( 0/ 12)e et 0/ 12)*

CU-lG6 ( 36) 8.0E+01 ( 8.7 A 14.7)E -1 11 ( 2.8 A 2.2)E o ( 9.6 A It.M)E -1

( 0) ( t.5 - 1.9)E I (-7.3 - 6.8)E o at 0/ 24)e et 0/ 12)e et o/ 12)e I-131 ( 36) 0 (-2.1 A 4.61L -1 21 ( 5.7 A 35.7)E -2 ( 5.7 A 35.7)E -2

( 0) (=4.0 - 6.1)E O (-2.1 - 2.1]E o

• ( o/ 24)e *( 0/ 12)* et 0/ 12).

C3 134 ( 36) 9 (-1.2 A 2)E o 21 (=7.4 A 3.6)E -1 (-7.4 A 3.6)F -t v2 ( 0) ( 5.4 - .A)E 0 (.4.2 = 5)F 0

'* at 0/ 24)e et 0/ 121e e( 0/ 121e CS-137 ( 36) 9 ( 2.5 A 1.6)E .t 12 ( 4.2 A 2.5)E -t (-2.0 A t.4)E -1

( 0) (-1.2 1.6)E o (-8.2 - 7.2)E -t et 0/ 24)e et 0/ 121e e( 0/ 12)*

BA-140 ( 36) 1.5E+01 (=2.4 A 4.1)E -1 11 ( 3.0 A 5.8)E -1 ( - 4 . 7 t. B.6)E -1

( 0) (-4.2 - 3.6)E 0 (-4.6 - 5.5)F 0 e( o/ 24)e *( 0/ 12 ) *. et u/ 12).

CE-tot ( 36) 2.0E+01 (=e.4 A 3.0)E -1 21 (-1.0 A 55.1)E -2 (-3.0 1 55.1)F -2

( 0) (-1.5 - 3.0)E o (-4.2 - 2.2)F o

• ( 0/ 24)e *( 0/ 12)e *( n / 12) e 1.7)E o ( l.9 A o CE-144 ( 36) A.0E+01 (=1.3 A t.0)E O 24 ( t.9 A .t.7)F t

( 0) (.9.6 = 7.3)E 0 (.t.0 - 1.1)E et 0/ 24)* *( p/ 12)* *( 0/ 12)e TH-22A ( 361 1.oE+01 ( 2.1 A 4)E O 21 ( 3.6 A 7)E o ( 3.6 A 7)F 'TI " ' ' '

( 0) (-2.6 - 6.9)E o (-1.9 . Ms.6)E 1

• ( 0/ Pale *( U/ 12). e( 0/ 12)e 9 NON. Role (IhE RF FFRS TO THE NUMRER OF SFPARATE MEASUNFMENTS WHICH >FRF GNFATEk THAN TEN (10) TIMES THE AVERAGF RACMGHOUND FOR THF PERIHO OF THF HFPHkT ee THE FHACTION OF SAMPLE ANALVSES YIELDING DETECTAHLE MEASUREMENTS (I.F. >LLD) IM INDICATEn WITHIN et AND )*,

OFFSIlE ENV!10NMENTAL DADIOLOGICAL MUNITORING Bo/05/th. PAGE 76 VEEMONT VANxfE

SUMMARY

FOR THE PERIOD 12/2a/78 . 12/31/T9 ME3IUM WATER . RIVER units: Pcl /L I T F R CADIONUCLIDES INDICATOR STATIHNS HIGHEST STATION CUH1ROL LilCAIIONS .

MEAN, RANGE,AND MEAN, RANGE,AND NEAN, RANGE,AND (NO ANALYSES) NOMINAL (NON. ROUTINE)* LLD NO. DETECIEDa* SIA. NO. DE TEC TED*

• hD. D E TE C TFl> *

• 5.7)E I 12 ( l.3 A 1.03E 2 ( l.2 A 3)F ' 2 H.3 ( 17) 9.0E+01 ( 8.9 A

( n) (.6,0 42.7)E I (.l.e . 42.7)E 1 ( 5.6 IM.9)E 1 .

• ( 1/ R)* *( I/ 4)* *( 0/ 4)*

e NON. ROUTINE RFFFRS Tu THE NUMRER OF SEPARATE HEASUREhENTS WHICH MFRE GREATER THAN IF N (10) TIMES THE AVERAGE RACMGROUND FOR THE PERIOD OF THE HFPORT

• • THE FNACTION OF SAMPLE ANALYSES YIELDING DETECTABLE MEASUREMENTS (I.E. >LLD) IS INDICATED WITHIN *( AND )*.

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OF F SI TE ENVIRONMENT AL W ADIOLOGIC AL NUNIT03f RG 60/u5/16 PAGF 9 WERaONT TANatF SHMMARY FOR THE PEWIOD 12/28/7A - 12/31/79 MEDIUM 3 FOOD / GARDEN CROPS UNITS: PC1/nG =ET CADIONUCLInFM JNDICATHR STATiuNS HIGHEST STATION CONikOL LOCATIOr*S MEAN, RANGE,AND NEAN, RANGE, ann mEAN,wANGE,AND (N0e ANALYSES) NOMINAL (h03=HOUTINE)* LLD NO. DE TE C TE0*

• STA. No. DETECTEDee NO. OffECTEuee CU-103 ( 2) 2.nE-02 ( 2.3 A 5.7)E o 21 ( 3.2 A 6.5)E o ( 3.2 A h.5)F o

( 0)

• ( 0/ 1)* et 0/ 1)* *( U/ 13e RU-106 ( 2) 2 (.2.4 A 4.6)E 1 21 ( 4.3 A 6.6)E I ( 4.3 A 6.6)F 1

( 01 (-2.4 - 0.0)E 1 et 0/ 1)e et 0/ 1)e et o/ t)e I-131 ( 2) n. ( 9.7 A 7.6)E o 21 ( 2.1 A 1.1)E I ( 2.1 A 1.1)F 1

( n)

• ( 0/ 13e *( U/ 1)* et o/ 11e CS-134 ( 21 2.0E.02 ( 6.2 A 6.2)E o 11 ( 6.2 A 6.2)E O (.5.6 A 6.A)E o

( n) (.5.6 - 0.o)E u

• ( 0/ 1)e *( 0/ 1)* et 0/ 1)e CS.137 ( 2) 2.pE.02 ( 2.8 A 5.4)E o 11 ( 2.6 A 5.4)E o ( 2.7 A 7.1)E o u ( n)

La *( 0/ t)e et U/ t)e et 0/ 1)e BA.tCO ( 2) 8.0E-02 (-5.2 A 9.0)E o 21 ( 1.7 A 10.6)E 0 (-1.7 A to.6)E o

( 0) (.5.2 - 0.0)E o (-l.7 - 0.0)F 4

• ( o/ 1)e et 0/ t)* *( 0/ 1)*

CE-101 (  ?) 4.0E.02 ( 2.9 A 7.5)E o 21 ( 8.5 A 9.5)E o ( 8.5 A 9.5)E o

( 0) et 0/ 1)e *( 0/ 1)e e( 0/ t)e CE.144 ( 7) 2 (-2.6 A 2.9)E 1 21 ( 3.4 A 3.8)E 1 ( 3.4 A 3.8)E I

( ol (.2.6 - 0.0)E 1 e( 0/ 1)* *( 0/ lie *( 0/ 11e TH.228 ( 7) 2.0F.07 ( 8.3 A 14.6)E n 21 ( 2.M A 2.4)E I ( 2.6 A 2.4)E 1

( 0)

• ( n/ 3). et of t). *( o/ t).

1. NON.RHHTINE HEFFRS TO THE NHMMER OF SFPANATE MEASUNEMFNTS hMICH EFRE GREAftH THAN IFN (10). TIMES THE AVERAGF RACMGROUND FHR THF PERIOD OF.THE REPONT ee THE FRACT]HN OF SAMPLE ANatYSES YTELn]NG DETECTAHLE MEASUREMFNTS (I.E. >LLn) is INDICATEn w!THTN et AND )e,

i i

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Vermont Yankee Off-Site Environmental Radiological Monitoring 1

' Summary of Analysis for the Period 1/01/79 - 12/31/79 Analysis Lower Limit All Indicator Highest Control i Performed of Detection Stations Station Stations (LLD) (mean range) (mean range) (mean range)

(Total Number)

(252) -

(13.1 1 3.6) 1.14(27.2 1 10.0) (11.2 1 0.4)

(8.4 - 46.1) (18.1 - 46.1) (8.5 - 15.2) 9

)

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. -. - - . . - . . _ . _ . . _ _ . . _ _ _ . _ . . _ _3 6 ._ _

IV. QUALITY ASSURANCE PROGRAM Three separate Quality Assurance Programs were performed during 1979 to demonstrate the validity of laboratory analyses by the Yankee Environmental Laboratory (YEL).

YEL participates in the EPA Interlaboratory Comparison (cross-check)

Program for those species and natrices routinely analyzed by the laboratory.

This provides an independent check of accuracy and precision of the laboratory analysis. When the results of the cross-check analysis fall outside of the control limit, an investigation is made to determine the cause of the problem and corrective measures are taken.

YEL maintains an intralaboratory Quality Control Program to assure the validity and reliability of the data. This program includes quality control of laboratory equipment, use of reference standards for calibration, determination of counting efficiencies, and analysis of blank and spiked samples. The records of the Quality Control Program are reviewed by the responsible cognizant, and corrective measures are taken whenever applicable.

Samples are prepared from split or homogenous media and sent to the laboratory for analysis. The results from this blind duplicate program are used to check for precision in laboratory analyses.

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V. ANALYSIS OF ENVIRONMENTAL MEDIA The analysis of environmental data may be divided into three sections: airborne radioactivity, waterborne radioactiviry, and direct exposure measurements. A discussion of each environmental media within these sections will follow:

1. Airborne Pathway

a. Air Particulate and Gaseous Radioiodine Figure 7 shows the concentration of gross beta activity in indicator and control stations air particulate filters. Except for the j activity detected in Station 23 during the third week of August, the activity in indicator snd control station samples were not statistically different. Station 23 is located approximately seven miles south-southeast of the plant in Northfield, Massachusetts.

This station was considered a control location but past performances indicate that this station has detected plant airborne releases.

The gross beta activity on the particulate filter from Station 23 exhibited higher than normal concentrations during the week j of August 20. The gamma analysis on the third quarter air particulate composite filters from Station 23 showed positive concentrations of Cs-134, Cs-137 and co-60. The filter from the week of August 20 was analyzed separately for gamma emitting nuclides, and it was concluded that the activity present in the quarterly composite filter was a result of the activity on this air filter. Since the concentration was ten times greater than i

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38

VERMONT YANKEE GR-B RIR PARTICULRTE

5. 00E FIG.7

~

4.00E  :

3.00E-01 s  :

5 2 3

s 2.00E-01 _

_  :(

u _

o. _

1.00E-01

. Akh f YT

~ '

0 iin n i n i iiii n i pii n nii p n iin ni in .. p iii n iiip i n n u i p n i

?

iip p o n i nip n iiiin p o i niiin in in ii JAN. FEB. HRR- APR. NRY JUNE JULY RUG. SEP. OCT. NOV. OEC.

1979 Z VALUES INDICRTE ACTIVITY NUMBERS OUTSIDE THE RANGE OF THE PLOT

T A T.I O N 10 = M STATION 11 = X STATION 12 =Z STATION 13 = + STATION 14 =X STRTION 15 =4 STATION 21 =0 STATION 22 =A STATION 23 =t

background concentration, Sr-89 and Sr-90 analyses were requested

! in accordance with our technical specifications. The analysis showed only background levels of these nuclides in the filter.

There were no unusual gaseous effluent releases during the third

- or fourth quarter of 1979. Since Cs-134 was detected in the air

particulate filter, we determined that the activity was plant

\

related. The total body dose from inhalation of these radionuclides in air was calculated using the methodology in Regulatory Guide 1.109. Using conservative assumptions the total body dose to a teen is 0.13 mrem /yr.

Radioiodine

, . Positive measurements of I-131 were detected in charcoal filter from several air monitoring stations during the weeks of April 22 i

and April 29. This activity was detected during a period of higher than normal iodine releases from Vermont Yankee due to failed fuel 1

problems. The maximum dose to a childs thyroid from the highest j activity concentration detected in a charcoal filter during this two week period through the inhalation pathway was 0.04 mrem.

This dose was calculated using Regulatory Guide 1.109 (Reference

2) and conservative assumptions.

b. Milk Milk was collected and analyzed monthly for gamma emitting nuclides ,

and quarterly for Sr-89 and Sr-90 activity. During 1979, there was one concentration of 1-131 in milk greater than the lower limit 40.--

' I of detection value. This activity was detected during a period 1

of elevated gaseous release of I-131 from Vermont Yankee. The I detectable I-131 concentration in March 5 milk sample from Station 12 located 2.5 km south from the plant was 0.08 + 0.02 pCi per liter and might be attributed to this elevated release. However, the I-131 concentration at this level is not dosimetrically significant.

c. Terrestrial Vegetation Vegetation samples were collected and analyzed in June, September, and November from nine sampling locations. These vegetation samples consisted of mixed grass and were analyzed for gamma emitting l

• nuclides. Potassium 40 and Th-228, both naturally occurring I nuclides plus Be-7, Co-60 and Cs-137 were detected in both indicator and control station samples. The mean concentration of Cs-137 in indicator stations were not statistically different from concentrations in control stations at the 95% confidence level.

The average concentration of Co-60 was greater in control station samples than indicator samples. The highest Co-60 concentration detected in vegetation was from Station 21, which is a control station located approximately 15.5 miles west-northwest from the plant, and is beyond plant influence. This indicates that the Co-60 and Cs-137 concentration in vegetation is probably related to residual activity from atmospheric nuclear tests.

l I

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d. Garden Crops Green leafy vegetation was collected and analyzed for gamma emitting nuclides in October. Naturally occurring K-40 was the only radionuclide detected with activity concentrations greater than the lower limit of detection.

e. Soil l

In,-Situ gamma ray spectrometry analyses were performed at 14 soil sampling stations around Vermont Yankee. Stations 13, 14, 16, 22 and 23 were monitored during the period from November 2nd to November 3rd, 1978, while the other nine stations were monitored in 1979 during the period from July 31st to August 3rd. Table 1 gives the station designations, distances, and direction from the plant.

The gamma in,-situ spectra analyses for the stations were generated using a mobil van equipped with a downlooker Ge(Li) detector and associated electronic equipment and software programs. The detector was set approximately one meter above the ground giving it a detection radius of ten meters. The analytical methodology used was based on HASL-258 (Reference 3). This technique eliminatec two problems which are present with normal core sampling annlysis:

(1) the non-representative nature of a single soil sample from a given station; (2) relatively long counting time due to a small sample volume.

1

TABLE 1 Location of Soil Sampling Stations Distance from the Station Code and Designated Name Plant (Km) Direction TS-10 Hinsdale, N.H. 1.1 ENE TS-11 North Hinsdale, N.H. 4.0 NNW TS-12 Hinsdale Substation, N.H. 3.1 E TS-13 Station #3.3, V.T. 1.8 SSE TS-14 Central Park Station, V.T. 2.5 SSW TS-15 Guilford Road, V.T. 3.2 WNW TS-16 Plant Well 0 -

TS-17 Vernon Nursing Well, V.T. 2.0 SSE TS-18 V.T. #32 Well, V.T. 1.8 SE TS-21 Hogback Mt., V.T. 25.0 WNW TS-22 Spofford Lake, N.H. 16.1 NNE TS-23 Northfield, Mass. 11.3 SSE TS-24. Route 9 Bridge 12.8 upriver TS-25 Brattleboro Well, V.T. 12.1 NNW

Table 2 shows the maximum values of the lower limit of detection (LLD) for 13 non-naturally occurring radionuclides. The only non-l naturally occurring radionuclide which had activity concentrations greater than the LLD value was Cs-137. Three major naturally 4 occurring radienuclides (K-40, U-238, Th-228) were also detected at all station locations. l i

1 I

Tables 3 and 4 show the results of the in, situ spectrometry in

)

l terms of radioactivity concentrations and exposure rate, respectively. The three naturally occurring radionuclides dominated )

the external exposure rate from the soil. Core samples were taken  !

from several locations and the activity concentrations of naturally occurring radionuclides from th'e laboratory analysis of these samples were compared to the activity detected in the in,-situ measurements. The results of this comparison at two soil stations l showed less than a 15% difference between the measurements (Table 5).

The Cs-137 activity concentrations at indicator and control locations were not statistically different indicating that this activity was due to fallout from past atmospheric weapon tests.

The results of the in-situ gamma ray spectrometry show that there were no detectable concentrations of radionuclides at soil stations due to the operation of Vermont Yankee.

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TABLE 2 Maximum Values of Lower Limit of Detection LLD LLD Radionuclide Exposure Rate (microrem) Concentration (pCi/Kg)

Ce-144 40E-4 16El Ce-161 32E-4 31El I-131 10E-3 13E0 Sb-125 35E-3 40E0 Ru-103 12E-3 11El Ba-140 18E-3 40E0 Rh-106 40E-3 90E0 Cs-137 20E-3 60E0

- Zr-95 27E-3 ISEO Nb-95 16E-3 8E0 Mn-54 17E-3 8E0 I

Co-60 50E-3 6E0 i La-140 40E-3 5E0 l

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• Y

TABLE 3 Isotopic In-Situ Soil Analysis at Vermont Yankee Activity Concentration pCi/Kg 1

Indicator Stations Radionuclide (meah range) Control Stations U-238 (736 + 112) 470 + 249 (520 ! 890) (40 ! 660)

Th-232 (807 + 110) (620 + 148)

(610 7 1000) (410 Z 810)

K-40 (1.13 1 0.19)E4 (9.90 1 2.49)E3 (8.80 - 15.2)E3 (710 - 12.5)E3 Cs-137 (616 1 400) (764 1 165)

(110 - 1320) (630 - 1020)-

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1 TABLE 4 Isotopic In-Situ Soil Analysis at Vermont Yankee Exposure Rate (Micro R/ hour)

Indicator Stations Control Stations Radionuclide (mean range) (mean range)

U-238 (1.33 1 0.21) (1.11 1 0.18)

(0.96 - 1.63) (0.87 - 1.35)

Th-232 (2.27 + 0.31) (1.74 + 0.42) .

(1.73 7 2.81) (1.14 7 2.27) l K-40 (2.02 1 0.34) (1.78 1 0.45)

(1.58 - 2.72) (1.27 - 2.25)

Cs-137 (0.34 + 0.22) (0.42 + 0.09) ,

l (0.06 + 0.73) (0.35 - 0.56)

' 1 t

i

- -. _ .47 ., _ , _ _

l TABLE 5 4

' Laboratory Soil Results In-Situ Results

~

Station Radionuclide (pCi/Kg) (pC1/Kg)  % Difference K-40 8%

10 (111 1 2)E2 (129 1 2)E2 6%

10 Th-232 (66 1 3)El (74 1 2)El 10%

10 U-238 (54 1 4)El (66 1 2)El K-40 2%

17 (113 1 14)E2 (108 1 2)E2 9%

17 Th-232 (73 1 5)El (61 1 2)El 2%

17 U-238 (54 1 6)El (52 1 2)El a

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2. Waterborne Pathway

a. Fish Fish samples were collected in June and October from one control and two indicator stations. Potassium 40 was the only radionuclide detected with activity concentrations greater than the lower limit of detection.

b. Aquatic Vegetation Aquatic vegetation samples were collected from two locations in June and September and were analyzed for gamma emitting nuclides.

Naturally occurring K-40 was detected in all samples and Th-228

• was detected in two of these samples. One sample collected in  ;

l

, Ser _. showed a concentration of Ce-144 just above the lower i

limit of detection. Since Ce-144 was not detected in 1979 liquid

< releases and there were no other plant related radionuclides detected in this sample, this value probably represents a statistical anamoly.

c. Sediment Sediment samples were collected in June and October from one control and two indicator stations. The sediment samples were taken with a coring device and these core samples were cut into 5 cm sections and analyzed for gamma emitting nuclides. Naturally occurring l

K-40 and Th-228 were detected in all samples. Cs-137 concentrations were also detected in all samples from indicator and control e

stations. Since the Cs-137 concentrations were approximately equal in control and indicator station samples and the section profile shows that the highest Cs-137 activity was in the 5-10 cm sections, this indicates that the activity was not recent and was probably related to residual Cs-137 activity from nuclear atmospheric tests.

d. River Water River water from three river locations was sampled and analyzed monthly for gamma emitting nuclides. The monthly samples were composited and analyzed for H-3 on a quarterly basis. The analysis of the third quarter composite sample from Station 12, located near the plant discharge, showed a concentration of H-3 activity

(

. above the LLD value. This activity coincides with a third quarter liquid discharge from the plant containing H-3 activity. The H-3 activity detected in the river water sample was small and the activity of the H-3 in the discharged liquid was 0.14% of the allowable release limit for E-3. 30 other radionuclydes were detected in river water samples during 1979.

e. Ground Water i

Ground water was grab sampled quarterly from four snapling locations. Naturally occurring Th-228 was the only radionuclide detected above the lower limit of detection.

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3. Direct Radiation Table 6 shows the yearly average exposure from direct gamma radiation in microrem per hour from 21 TLD stations located on and off the Vermont Yankee site. Zone I plus restricted boundary TLD's (not including TLD on the river side of the plant) exhibited direct radiation exposures which range from 8.4 to 16.1 microrem per hour. This compares favorably to the 8.5 to 15.2 microrem per hour recorded at Zone II locations.

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TABLE 6 1979 Average TLD Exposure microrem/ hour GM 1.0 Zone I 11.7 GM 1.1 Zone I 11.1 GM 1.2 Zone I 12.5 GM 1.3 Zone I 12.0 GM 1.4 Zone I 12.3 GM 1.5 Zone I 11.8 GM 1.6 Site Boundary 10.8 GM 1.7 Site Boundary 10.3 GM 1.8 Site Boundary 13.3 GM 1.9 Site Boundary 13.4 GM 1.10 Site Boundary 12.8 GM 1.11 Site Boundary 12.1 GM 1.12 Site Boundary 12.7 GM 1.13 Site Boundary 12.9 GM 1.14 Site Boundary 27.2 GM 1.15 Site Boundary 13.2 GM 1.16 Site boundary 12.8 GM 1.17 Site Boundary 12.4

. GM 2.1 Zone II 11.1 GM 2.2 Zone II 11.7 GM 2.3 Zone II 10.9 Zone I average 12.1 1 0.9 (excluding site boundary locations on river side of plart)

Zone II average 11.2 1 0.4 l

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VI. ENVIRONMENTAL DOSIMETRY The mean concentration of radionuclides having activity concentrations greater than the lower limit of detection values in indicator and control station samples of air particulate filters, charcoal filters, drinking water, seafood, milk, and food crops were used to calculate total body doses to adults. The average individuals usage factors were taken from USNRC Regulatory Guide 1.109 (October 1977). These usage factors are:

8000 M3 per year of inhaled air 370 liters per year of drinking water 7.9 Kg per year of seafood

. 110 liters per year of milk 190 Kg per year of food products The product of the mean radionuclide concentration and the usage ,

I factor yields the yearly radionuclide intake. The dose is calculated by using the dose conversion factors contained in USNRC Regulatory Guide 1.109.

I-131 doses to the thyroid were calculated separately from data of the sample media mentioned above. In addition, external whole body doses were measured with TLD's placed in indicator and control stations.

Table 7 summarizes the environmental doses from the mean radionuclide concentrations greater than LLD values in indicator and control station samples. Site boundary direct radiation measurements from TLD's located o

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or LPe fenceline at the river side of the plant were not used since no laividuals reside near these locations. This summary demonstrates that the operation of Vermont Yankee Power Plant does not expose local residents to larger doses of radiation than people residing at greater distances from the plant.

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- - - _ _ _ _54 - - . , .. .

1 TABLE 7 Summary of Environmental Radiation Doses (arem/yr)

Source Plant Environs Background Inhalation 1.40 x 10-2 7.57 x 10-4 1

Seafood 0.03 0.25 Food Crops Milk 0.67 0.99 Water .-

I-131 0.44** 0.81**

TLD 106.0 98.1 Total 107.2 100.2

• All concentrations

• • Thyroid dose for I-131 activity l

o l

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=

o VII. CONCLUSION During 1979, our Radiological Environmental Monitoring Program conducted in the environs of Vermont Yankee showed, in general, that the major constituents of the radionuclides measured in environmental media were naturally cccurring and residual radionuclides from atmospheric nuclear tests. There was no significant increase in environmental radioactivity due to the operation of Vermont Yankee.

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VIII. REFERENCES I

1. USNRC Regulatory Guide 4.8, " Environmental Techr.ical Specifications for Nuclear Power Plants",1975.

2. USNRC Regulatory Guide 1.109, " Calculation on Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10CFR50 Appendix I", 1977.

3. HASL-258, "In-Situ (Ge(Li)) and Na(TL) Gamma Ray Spectrometry",

September 1972.

1 J

I 4

a o

+

= -

57 _ _ _