ML20128D135

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Annual Radiological Environ Monitoring Rept,1984
ML20128D135
Person / Time
Site: Vermont Yankee Entergy icon.png
Issue date: 12/31/1984
From: Capstick R
VERMONT YANKEE NUCLEAR POWER CORP.
To: Murley T
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
FVY-85-39, NUDOCS 8505280506
Download: ML20128D135 (63)
v • d • e


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I I VERMONT YANKEE NUCLEAR POWER CORPORATION ANNUAL RADIOLOGICAL ENVIRONMENTAL NONITORING REPORT January - December 1984 I

April 1985 I

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l Prepared By: Yankee th, .ctric Company Environmental Eng2,eerir.; a partment 1671 Worcester Road Framingham, Massachusetts 01701 l

E45 8505280506 DR 841231 ADOCK 05000271 I[l PDR l-

TABLE OF CONTENTS Pa LIST OF TABLES. ... ............................. ........... .... iii LIST OF FIGURES.. ......... ............................. ........ iv

1.0 INTRODUCTION

.................. ....................... ........... I 2.0 ENVIRONMENTAL SURVEILLANCE PROGRAM. .......... ......... .. ..... 2 3.0

SUMMARY

OF 1984 ENVIRONMENTAL DATA........ ...... ... ........... 9 A. Air Particulate....... ......... . . .. ...... ............. 11 B. Charcoal Filter., ..... ....... ............................ 15 C. Milk..... .. ... ... .... . ....... ....... ................. 17 D. Mixed Vogotation.... ... . .. ...... ...... ...... ..... 22 E. Food Crop.... . .. . .. .... ... ....... ......... .. 25 F. Meat, Poultry. Eggs. .. ......... . .... ...... . .... ... 26 G. Silage............... .. ......... .......... .. . ....... .. 27 30

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Ground Water..

River Water.......... .. ....

33 J. Aquatic Vegetation.. . .... . ....... .... ............ .. 36 K. Sediment..... ...... . . .. . .. .... .. .................... 39 L. Finfish.. . .......... .. ...... .......................... 42 M. Direct Radiation......... ........ .......... ......... ... .. 45 N. Soil..... ... ... . . . . ................ ... .... . 49 4.0 QUALITY ASSURANCE PROGRAM.. ... ... .... ............ ... ... 52

[ 5.0 LAND USE CENSUS... . ... . . ... .. .. .. .... ......... 56 i

t 6.0

SUMMARY

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7.0 REFERENCES

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I LIST OF TABLES Number Title Page 2.1 Radiological Environmental Surveillance Program..... .... .. 3 2.2 Radiological Environmental Surveillance Locations........... 4 3.1 Summary of Direct Radiation Measurements, 1983..... ........ 47 3.2 Ratio of Zone 1 to Zone 2 Exposures.................... ... 48 3.3 Summary of In Situ Soil Analyses - Exposure Rate... ..... .. 50 3.4 Summary of In Situ Soil Analyses - Concentration......... . 51 4.1 EPA Interiaboratory and Intralaboratory Results. .. .. ... 54 I

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LIST OF FIGURES I Number Title Page 2.1 Environmental Radiological Monitoring Locations in Close Proximity to Vermont Yankee... ............................ 6 Environmental Radiological Monitoring Locations Within I 2.2 5 Kilometers of Vermont Yankee.................... ........ 7 2.3 Environmental Radiological Monitoring Locations Greater I 3.1 Than 5 Kilometers from Vermont Yankee. .....................

Gross Beta Moasurements of Air Particulate Filters at 8

Vermont Yankee......................................... .... 12 3.2 Cesium-137 in Cow Milk at Vermont Yankee.................... 18 3.3 Strontium-90 in Cow Milk at Vermont Yankee. .. ............. 19 I

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1.0 INTRODUCTION

The radiological environmental surveillance program at Vermont Yankee has been designed and carried out with specific objectives in mind. They are as follows:

- To provide an early indication of the appearance or accumulation of any radioactive material in the environment caused by the operation

-of the nuclear power station.

- To provide assurance to regulatory agencies and the public that the station's environmental impact is known and within anticipated limits.

To verify the adequacy and proper functioning of station effluent I

controls and monitoring systems

- To provide an estimate of actual radiation exposure to the surrounding population.

I - To provide standby monitoring capability for rapid assessment of risk to the general public in the event of unanticipated or accidental releases of radioactive material.

I During 1984, as in the past, Aquatec, Inc., collected all of the aquatic environmental samples, while the Chemistry and Health Physics staff collected the bulk of the terrestrial environmental samples and processed all environmental thermoluminescent dosimeters (TLDs) for direct radiation measurements. After the initial processing, all non-TLD samples were sent to the Yankee Atomic L^nvironmental Laboratory in Westboro, Massachusetts for further processing and radionuclide analysis. This report presents a summary of the findings of the radiological environmental surveillance program for I 1984.

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2.0 ENVIRONMENTAL SURVEILLANCE PROGRAM In this section, Table 2.1 outlines the surveillance program as required by the plant Technical Specifications. Table 2.2 lists the sampling stations and their specific locations (distances are measured from the center of the Containment Building). The monitoring locations are shown on maps in Figures 2.1 through 2.3.

Below are listed the two-letter media codes and what they represent:

AP Air Particulate CF Charcoal Filter I TM WG Milk Ground Water WR River Water TG Mixed Vegetation TC Silage TF Food Crop TZ Meat, Poultry, Eggs TS Soil SE Sediment FH Finfish AV Aquatic Vegetation GM Direct Radiation (TLD)

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I Table 2.1 I Vermont Yankee Radiological Environmental Surveillance Program Media Sampling Frequency Required Analyses Air Particulate (AP) - Weekly Gross beta, Sr-89/90 (2)

I - Quartr2rly Composite Gamma spectroscopy Charcoal Filter (CF) - Weekly I-131 Milk (TM) - Monthly Gamma spectroscopy, I-131

- Quarterly Composite Sr-89/90 Mixed Vegetation (TG) - Quarterly (1) Gamma spectroscopy Food Crop (TF) - Annually (4) Gamma spectroscopy, I-131 on green leafy portions of vegetables Meat, Poultry, Eggs (TZ) - Annually (3) Gamma spectroscopy Silage (TC) - Annually (4) Gamma spectroscopy Ground Water (WG) - Quarterly Gross beta, H-3, gamma spectroscopy, Sr-89/90 (2)

- Once Per 3 Years Ra-226 River Water (WR) - Monthly (1) Gross beta, gamma spectroscopy

- Quarterly Composite H-3, Sr-89/90 (2)

Aquatic Vegetation (AV) - Semiannually Gamma spectroscopy, Sr-89/90 (2)

Soil (TS) - Once per 3 Years Gamma spectroscopy, SR-89/90 (2)

Sediment (SE) - Semiannually Gamma spectroscopy, Sr-89/90 (2)

Finfish (FH) - Semiannually (1) Gamma spectroscopy, Sr-89/90 (2)

Direct Radiation (GM) - Monthly Integrated gamma dose (1) Collection frequency dependent upon availability of samples during winter.

(2) Performed whenever plant-related Cs-137 concentration is 10X non-plant-related Cs-137 concentration.

(3) Subject to availability at end of grazing season.

(4) Collected at harvest time in reasonable proximity to specified location; subject to availability.

I Table 2.2 Vermont Yankee Radiological Environmental Surveillance Locations Distance Station Code From Plant Direction (Media - Sta. No.) Station Description Zone * (km) From Plant AP/CF/TG-10 Hinsdale, NH 1 1.2 NE AP/CF/TG-11 N. Hinsdale, NH 1 3.6 NNW AP/CF/TG-12 Hinsdale Substation 1 3.1 E AP/CF/TG-13 River Station No. 3.3 1 1.9 SSE AP/CF/TG-14 Fairman Road 1 2.4 SW AP/CF/TG-15 Tyler Hill 1 3.4 WNW AP/CF/TG-21 Hog 5ack Mountain 2 25.0 WNW AP/CF/TG-22 Spofford Lake, NH 2 16.1 NNE AP/CF/TG-23 Nortnfield, MA 2 11.3 SSE TM/TC-11 Miller Farm 1 0.8 WNW I TM/TC-12 TM/TC-13 TM/TC-21 Whitaker Farm Newton Farm Brattleboro Dairy 1

1 2

2.6 5.1 15.0 S

SSE N

WG-11 VY Plant Well 1 0.0 On-Site-WG-12 Vernon Nursing Well 1 2.0 SSE WG-13 VT No. 32 Well 1 1.8 SE WG-21 Brattleboro Well 2 12.1 NNW WR/SE/FH-11 River Station No. 3.3 1 1.9 Down River WR/SE/FH-12 Plant Discharge 1 0.0 On-Site WR/SE/FH-21 Route 9 Bridge 2 12.8 Up River AV-11 Downstream Swamp 0.8 Down River I

1 AV-21 Upstream Swamp 2 0.8 Up River TS-01 Fairman Road 1 2.4 SW l TS-02 VT No. 32 Well 1 1.8 SE TS-03 Route 9 Bridge, NH 2 12.8 Up River TS-04 Vernon Nursing Well 1 2.0 SSE

' I TS-OS TS-06 TS-07 Brattleboro Well N. Hinsdale, NH Hinsdale, NH 2

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12.1 3.6 1.2 NNW NNW NE TS-08 Hinsdale Substation 1 3.1 E TS-09 River Station No. 3.3 1 1.9 SSE TS-10 Hogback Mountain 2 25.0 WNW i TS-11 Spofford Lake, NH 2 16.1 NNE g TS-12 Northfield, MA 2 11.3 SSE l 3 TS-13 Tyler Hill 1 3.4 WNW TS-14 Plant Well 1 0.0 On-Site l

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Table 2.2 (continued)

Vermont Yankee Radiological Environmental Surveillance Locations Distance Station Code From Plant Direction (Media - Sta. No.) Station Description Zone * (km) From Plant GM--1. 0 Hinsdale, NH I

1 1.2 NE GM-1.1 N. Hinsdale, NH 1 3.6 NNW GM-1.2 Hinsdale Substation 1 3.1 E GM-1.3 River Station No. 3.3 1 1.9 SSE I GM-1.4 GM-1.5 GM-1.6 Fairman Road Tyler Hill Site Boundary 1

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2.4 3.4 0.160 SW WNW NNW GM-1.7 Site Boundary 1 0.315 WNW GM-1.8 Site Boundary 1 0.315 SSW GM-1.9 Site Boundary 1 0.450 S GM-1.10 Site Boundary 1 0.630 S GM-1.11 Site Boundary 1 0.920 S GM-1.12 Site Boundary 1 0.760 SSE GM-1.13 Site Boundary 1 0.480 SSE I GM-1.14 GM-1.15 GM-1.16 Site Boundary Site Boundary Site Boundary 1

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0.315 0.027 0.395 SE N

NW GM-1.17 Vernon School 1 0.575 SSW GM-2.1 Hogback Mountain 2 25.0 WNW GM-2.2 Spofford Lake 2 16.1 NNE GM-2.3 Northfield, MA 2 11.3 SSE

  • Zone 1 = Indicator Stations; Zone 2 = Control Stations l

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Figure 2.2 Environmental Radiological Monitoring Locations within 5 Kilometers of Vermont Yankee I - -

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K I I KILOMETERS l Figure 2.3 Environmental Radiological Monitoring Locations

Greater Than 5 Kilometers from Vermont Yankee

3.0.

SUMMARY

OF 1984 ENVIRONMENTAL DATA The following pages summarize the analytical results of all the environmental samples whi.ch were collected during 1984. Each environmental media category is presented as a separate subsection. A discussion of the sampling program and results is followed by a table which summarizes the I year's data for each category. The tables, for all media but Direct Radiation, were generated by the computer program, ERMAP. At the top of each table, ERMAP lists the units of measurement for each medium. The left hand column contains the radionuclide which is being reported, total number of analyses of that radionuclide, and the number of measurements which exceeds ten times the yearly average background value. The latter are classified as "non-routine" measurements. The next column lists the Lower Limit of Detection (LLD) for those radionuclides which have detection capability requirements as specified in the USNRC's Branch Technical Position (Reference 1). (Guidance is not given for many of the radionuclides routinely measured and reported herein.) LLDs equal to or less than these values are achieved greater than 95 percent of the time. LLDs given in the Radiological Environmental Technical Specifications are not shown in the tables, nor were they used during 1984, due to the April 1, 1985, implementation date of the RETS.

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 1" stations. Distant stations, which are beyond plant influence are called " Control" or " Zone 2" stations.

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:

I o The mean value of all concentrations includin<,.ne.gative values and values below LLD.

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

)

o The lowest and highest calculated concentration.

o The number of positive measurements (activity which is three times greater than the standard deviation) d'ivided by the total number of measurements.

Each single radioactivity measurement datum in this report is based on a single measurement and is reported as a concentration plus or minus a one standard deviation uncertainty. The quoted uncertainty terni represents only the random uncertainty associated with the radioactive decay process (counting statistics), and not the propagation of all possible uncertainties in the analytical procedure. Radioactivity is considered to be present in a sample when the concentration exceeds three times its associated standard deviation.

Expressed in another way, the measurement is considered to be statistically different than normal instrument background when the plus or minus three standard deviation range surrounding the measurement does not include zero.

All data used in the generation of the data tables were used as reported from the analytical laboratory. No special treatment was given to negative values or to "less than LLD" values. This methodology is consistent with currently accepted practices in the field of radiological environmental monitoring and with the treatment given data over the past several years in Vermont Yankee's Radiological Environmental Monitoring reports.

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f' A) Air particulate Air monitoring stations are established at a total of nine locations. Six of these locations are indicators, while the remaining three are control stations. Airborne particulates are collected by passing the air through a fiberglass filter. These filters are collected weekly and held for at least 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> before being analyzed for gross beta activity (indicated as GR-B in tables) to allow for the decay of radon and thoron daughter products. Weekly composite air filters from each location are analyzed quarterly for gamma emitting radionuclides.

Gross-beta counts (Figure 3.1) generally showed the same fluctuations at indicator stations as at controls, thereby indicating that any plant contribution was negligible. Other than I naturally-occurring Be-7, no gamma-emitting radionuclides were detected on the quarterly composite filters.

For the period March 13 to March 20, 1984, wookly air particulate samples were collected as required by Technical Specifications.

The samples were prepared for shipment to the Yankee Environmental Laboratory, but were never received there. An investigation indicated that the samples were mistakenly thrown out as rubbish.

A review of the records for the weeks prior to and following the missed analyses did not reveal any reason to suspect other than normal readings (see Licensee Event Report 84-04).

Following collection of the air particulate sample at Station AP-11, on June 12, 1984, the sampling pump was inadvertently left off. Consequently, no sample was collected from June 12 through June 17 (see Licensee Event Report 84-08).

I At Station AP-12, no sample was collected from July 22 to July 23, 1984, due to a malfunctioning sampling pump following a lightning strike (see Licensee Event Report 84-14).

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EWIR0ffENTAL RADIOLOGICAL PROGRAM SlMMRY VERM0NT YAM (EE NUCLEAR POWER STATION, VERNON VT I EDIUM: AIR PARTICULATE JAWARY - DECEMBER 1984 UNITS: PCI/CU. M IE!CATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS n++++ nee n**e ne +een++++neenennente ene++ene+*****

RADIOMXLIDES EAN EAN EAN (NO. ANALYSES) REQUIRED RANGE STA. RANGE RAEE (N0pH10UTIE)e LLD NO. DETECTED *e NO. NO. DETECTED ** NO. DETECTED **

GR-B (458) .01 ( 2.3 i .1)E -2 12 ( 2.4 i .1)E -2 ( 9.2 i 13.0)E -3

( 0) ( 6.2 - 462.0)E -4 ( 1.0 - 4.3)E -2 (-2.0 - .0)E 0 e(302/305)e e( 51/ 51)e s(152/153)*

BE-7 ( 36) ( 4.5 i .2)E -2 21 ( 5.1 i .2)E -2 ( 4.5 1 .2)E -2

( 0) ( 2.9 - 5.6)E -2 ( 4.6 - 5.6)E -2 ( 2.5 - 5.6)E -2

  • ( 24/ 24)* *( 4/ 4)* *( 12/ 12)*

K-40 ( 36) ( 3.7 t .7)E -3 11 ( 5.8 1 2.7)E -3 ( 3.4 i .8)E -3

( 0) (-2.1 - 10.2)E -3 (-1.3 - 10.2)E -3 (-5.9 - 94.6)E -4

  • ( 0/ 24)* *( 0/ 4)* *( 0/ 12)e FN-54 ( 36) ( 4.9 i 5.0)E -5 13 ( 1.7 i .9)E -4 (-1.4 i 3.9)E -5

( 0) (-5.8 - 4.7)E -4 (-6.0 - 38.0)E -5 (-2.3 - 2.1)E -4

  • ( 0/ 24)* *( 0/ 4)* *( 0/ 12)e CO-58 ( 36) (-6.0 1 54.4)E -6 10 ( 9.9 2 24.8)E -5 (-3.9 i 7.9)E -5

( 0) (-4.9 - 8.2)E -4 (-2.7 - 8.2)E -4 (-5.9 - 3.2)E -4

  • ( 0/24)* *( 0/ 4)* #( 0/ 12)*

CO-60 ( 36) ( !.2 i .6)E -4 14 ( 3.5 t 1.4)E -4 ( 6.7 1 4.1)E -5

( 0) (-5.6 - 7.8)E -4 (-4.2 - 59.0)E -5 (-2.2 - 2.8)E -4

  • ( 0/ 24)* *( 0/ 4)e et 0/ 12)*

ZN-65 ( 36) ( 4.0

  • 110.7)E -6 12 ( !.6 i 3.8)E -4 (-9.5 1 11.8)E -5

( 0) (-1.3 - 1.3)E -3 (-3.0 - 12.8)E -4 (-9.2 - 4.0)E -4 f( 0/ 24)* f( 0/ 4)* *( 0/ 12)*

ZR-95 ( 36) (-3.0 i 8.3)E -5 22 ( 2.1 t 1.9)E -4 ( 6.6 1 14.9)E -5

( 0) (-6.6 - 7.6)E -4 (-1.6 - 7.2)E -4 (-7.4 - 10.4)E -4 et 0/ 24)e *( 0/ 4)* *( 0/ 12)e RU-103 ( 36) ( 8.0 t 7.5)E -5 11 ( 4.8 1 2.4)E -4 ( 1.3 i .4)E -4

( 0) (-9.2 - 11.3)E -4 ( 1.8 - 113.0)E -5 (-4.5 - 44.2)E -5 e( 0/ 24)e e( 0/ 4)* e( 0/ 12)e e NON-ROUTIE REFERS TO TE NLf9ER OF SEPARATE EAST #tENNTS lef!CH WERE GREATER T)MN TEN (10) TIES TE AVERAGE BACKGROLMD FOR TE PERIOD 0F TE REP (RT.

    • TE FRACTION OF SAff'LE ANALYSES YIELDING DETECTABLE EASlREENTS (I.E. >3 STD DEVIATIONS) IS IE !CATED WITH f( le.

ENVIROMOTAL RADIOLOGICAL PROGRAM SlMIARY I

VERMONT YAKEE NUCLEAR POWER STATION. VERNON, VT JAWARY - DECDEER 1984 EDIUM: AIR PARTIClLATE UNITS: PCI/CU. N I INDICATOR STATIONS eM HetM HfM Het STATION WITH HIGEST EAN

      • H4MfMfMfffffMffM CONTROL STATIONS HMHffMM*Hf RADIOM.lCLIDES EAN EAN EAN (NO. AMLYSES) REQUIRED RANGE STA. RANGE RANCE (NON-90UTIE)* LLD NO. DETECTEDie NO. NO. DETECTEDee NO. DETECTEDee RU-106 ( 36) (-5.3 i 4.5)E -4 21 ( 5.0 i 6.1)E -4 ( 8.7 i 31.9)E -5

( 0) (-6.3 - 4.3)E -3 (-8.5 - 21.3)E -4 (-1.4 - 2.1)E -3

  • ( 0/ 24)* et 0/ 4)* f( 0/ 12)*

CS-134 ( 36) .05 (-1.3 i .5)E -4 15 ( 8.6 i 102.9)E -6 (-1.7 i .6)E -4

( 0) (-8.2 - 2.9)E -4 (-2.7 - 2.3)E -4 (-4.0 - 2.6)E -4 I f( 0/ 24)* et 0/ 4)e 12 ( 2.3 i

  • ( 0/ 12)*

( 2.4 i 5.3)E -5 CS-137 ( 36) .06 (1.21 .3)E -4 .9)E -4 I ( 0) (-1.3 -

et 0/ 24)e 4.8)E-4 ( 8.6 - 48.3)E -5 f( 0/ 4)*

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f( 0/ 12)*

3.1)E -4 BA-140 ( 36) (-5.3 1 2.7)E -4 11 ( 6.2 i 8.9)E -4 (-3.7 1 3.1)E -4

( 0) (-3.6 - 2.3)E -3 (-1.1 - 2.3)E -3 (-2.0 - 1.5)E -3

  • ( 0/ 24)e el 0/ 4)* *( 0/ 12)*

CE-141 ( 36) ( 7.9 i 11.0)E -5 21 ( 4.3 i 1.0)E -4 ( 3.0 1 .7)E -4

( 0) (-1.1 - 1.4)E -3 ( 2.6 - 7.3)E -4 (-2.5 - 72.8)E -5

  • ( 0/ 24)* *( 0/ 4)# *( 0/ 12)*

CE-144 ( 36) (-2.5 i 1.6)E -4 22 ( 5.3 1 3.1)E -4 ( 3.0 1 2.1)E -4

( 0) (-2.0 - 1.4)E -3 ( !.3 - 14.7)E -4 (-7.9 - 16.6)E -4

  • ( 0/ 24)# f( 0/ 4)e f( 0/ 12)e TH-232 ( 36) ( 1.0 i 15.3)E -5 10 ( 4.5 i 1.7)E -4 (-9.4 i 190.1)E -6

( 0) (-2.0 - 1.3)E -3 ( 9.6 - 85.0)E -5 (-8.9 - 10.7)E -4 et 0/ 24)e #( 0/ 4)e e( 0/121e a NON-R0lfrIE REFERS TO TE lutBER (F SEPARATE EASlREENTS lel!CH ERE GREATER TMN TEN (10) TIES TE AVERAGE BACK0R'llN) FOR TE PERIOD OF TE REPORT.

    • TE FRACTION OF SAPPLE ANALYSES YIELDING DETECTABLE EASLREENTS (I.E. >3 STD DEVIATICNS) IS INDICATED WITH el le.

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I B) Charcoal Filters I Charcoal filter cartridges are situated in series with the air particulate fiber filters. Monitoring stations are located at a total of nine stations, six of which are indicators and three of which are controls. Charcoal filters from the nine air sampling I stations were collected and analyzed weekly for I-131 activity. No radioactive I-131 was detected on any 1984 charcoal filter sample.

For the period March 13 to March 20, 1984, weekly charcoal filter samples were collected as required by Technical Specifications.

The samples were prepared for shipment to the Yankee Environmental Laboratory, but were never received there. An investigation indicated that the samples were mistakenly thrown out as rubbish.

A review of the records for the weeks prior to and following the I missed analyses did not reveal any reason to suspect other than normal readings (see Licensee Event Report 84-04).

Following collection of the charcoal sample at Station CF-11 on June 12, 1984, the sampling pump was inadvertently left off.

Consequently, no sample was collected from June 12 through June 17 (see Licensee Event Report 84-08).

At Station CF-12, no sample was collected from July 22 to July 23, 1984, due to a malfunctioning sampling pump following a lightning strike (see Licensee Event Report 84-14).

I I EWIR0 MENTAL RADIOLOGICAL PROGRAM SIMIARY VERMONT YAEEE WCLEAR P0lER STATION, VEMON, VT JAM)ARY - DECDSER 1984 ED!lM: CHARC0AL FILTER LMITS: PCI/CU. M IEICATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS

++++++++++++++++n ++++++++++++n ++++++++++e +++++e++++++++++

RADIOMK1. IDES EAN EAN EAN (NO. ANALYSES) EQUIRED RANGE STA. RANGE RANCE (NON-R0lf7IEle LLD NO. DETECTED ** NO. NO. DETECTED ++ NO. DETECTED ++

I I-131 (458)

( 0)

.07 (-5.0 i 8.1)E -4

(-6.2 - 17.0)E -2 14 ( 4.1 i 3.6)E -3

(-2.7 - 17.0)E -2

(-6.3 1

(-9.4 -

6.1)E -2

.0)E O e( 0/305)e et 0/ 51)e f( 0/153)e I

I e NON-ROUTIE REFERS TO TE NLf9ER OF SEPARATE EASLRDENTS WHIQi WERE GREATER THAN TEN (10) TIES TE AVERAGE BACKGROUND FOR TE PERIOD OF TE REPORT.

l I ** TE FRACTION OF SAWLE ANALYSES YIELDING DETECTABLE EASUREENTS (I.E. >3 STD DEVIATIONS) IS IEICATED WITH et le.

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1

C) Milk I Milk samples were collected and analyzed monthly for low level I I-131 and gamma-emitting radionuclides. Monthly samples were composited quarterly and analyzed for Sr-89 and Sr-90.

Detectable concentrations of Cs-137 and Sr-90 were measured in milk  ;

samples submitted from the indicator and control locations. .

Concentrations were similar to those detected in 1983. The detected levels are consistent with those measured in cow milk at other New England locations. Such levels have been well documented and are attributed to fallout from nuclear weapons tests.

In addition to these radionuclides, naturally occurring K-40 was detected in all samples.

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m m m m m m e e e e e e m e e e m m M I'

FIGURE 3.2 CESIUM-137 IN COW MILK VERMONT YRNKEE 3

] to i

i e-l O - STATION 11 i 0 - STATION 12 A - STATION 13 g,

+ - STATION 21 i  ? E w

6-

]

R s

W

E 8 +- +

8 i

l C

'+

2- 6

+

+/

0 .- .. . . . .. . . -

JAN FTB F1AR ffR F1RY JUN JUL fiUG SEP OCT NOV DEC 1984 l

l

m m m m m m m m m

! FIGURE 3.3

STRONTIUM-90 IN COW NILK j VERMONT YANKEE

! 10 I

1 6-O- STATION 11 O - STRTION 12 A - STATION 13 l + - STATION 21

\ E i

$ 5 6-e

]

E

\

e i

B a

s-1 b

{ ~-9

' a i 2-

[ =

)

0 , , , , , , , , , , ,

JAN FEB t1AR ffR t1RY JUN JUL fiUG SEP 007 NOV DEC 1984 4

i

ENVIR0 MENTAL RADIOLOGICAL PROGRAM SLNMRY VERMONT YAM:EE NUCLEAR POER STATION, VERNON, VT I ED!lM: MILK JANLMRY - DECDSER 1984 LNITS: PCI/KG 1

Il0ICATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS

........ e e...........e........ .e e.... ... ..

RADIOKJCLIDES EAN EAN EAN I (ND. ANALYSES) REQUIRED RANE (NON-R0llTIE)e LLD NO. DETECTED.*

STA. RANCE NO. NO. DETECTED.e RANGE NO. DETECTED.e l

SR-89 ( 16) (-2.7 1 1.2)E -1 21 ( 5.9 1 3.4)E-1 ( 5.9 1 3.4)E -1

( 0) (-1.1 - .3)E O (-1.3 - 14.1)E -1 (-1.3 - 14.1)E -1 e( 0/ 12)e *( 0/ 4)e et 0/ 4)e l SR-90 ( 16) ( 2.6 t .2)E O 12 ( 3.3 i .3)E 0 ( 2.7 i .4)E 0

( 0) ( !.6 - 4.0)E O ( 2.6 - 4.0)E 0 ( l.8 - 3.7)E 0

  • ( 12/ 12)* *( 4/ 4)e el 4/ 4).

K-40 ( 48) ( l.4 i .0)E 3 13 ( !.4 i .0)E 3 ( !.2 i .0)E 3

( 0) ( !.2 - 1.6)E 3 ( !.3 - 1.6)E 3 ( 1.1 - 1.3)E 3

  • ( 36/ 36)e of 12/ 12)e *(12/12)*

191-54 ( 48) (-1.5 1 2.0)E -1 11 ( !.3 i 4.2)E -1 (-1.1 2 2.6)E -1

( 0) (-2.9 - 2.6)E O (-2.9 - 2.6)E O (-1.5 - 1.6)E 0

  • ( 0/ 36)* et 0/12)* *( 0/ 12)e

( !.31 (-7.3 1 I (-1.6 i CO-58 ( 48) 1.9)E -1 11 3.5)E -1 2.1)E -1

( 0) (-1.9 - 2.8)E 0 (-1.7 - 2.8)E O (-1.8 - .4)E O

  • ( 0/ 36)* et 0/ 12)* et 0/ 12)*

CD-60 ( 48) (-1.6 1 1.8)E -1 12 ( 5.9 1 36.2)E-2 ( 5.4 1 33.9)E -2

( 0) (-1.8 - 2.6)E 0 (-1.6 - 2.6)E O (-1.6 - 2.5)E O e( 0/ 36)* ef 0/12)e *( 0/ 12)e ZN-65 ( 48) ( 6.2 1 4.6)E -! 12 ( !.3 i .9)E O (-2.8 1 6.5)E -1

( 0) (-4.1 - 6.5)E O (-3.5 - 6.5)E O (-3.6 - 3.7)E 0

  • ( 0/ 36)* *( 0/12)# *( 0/ 12)e ZR-95 ( 48) (-2.6 1 3.3)E -l  !! ( 7.8 i 6.0)E-1 (-6.5 1 4.0)E -l 7

( 0) (-5.3 - 5.6)E O (-2.2 - 5.6)E 0 (-3.5 - 1.1)E 0

  • ( 0/ 36)e e( 0/ 12)# e( 0/ 12)e l

i RU-103 ( 48) (-9.3 i 1.8)E-1 12 (-7.0 1 3.4)E -1 (-1.1 i .2)E 0

( 0) (-4.1 - 1.4)E 0 (-1.9 - 1.4)E 0 (-2.5 - .3)E 0 lg3

  • ( 0/ 36)e et 0/ 12)e *( 0/12)e e NDHOUTIE EFERS TO TE MASER OF SEPARATE EASLREENTS lef!CH IDE OREATER l5l l

T)W( TEN (10) TIES TE AVER 40E BACKGROLM) FOR TE PER!00 0F TE REPORT.

  1. e TE FRACTION OF $#FLE AMLYSES YIELDING DETECTABLE EASlEDENTS (1.E. >3 STD DEVIATIONS) IS IM)!CATED WITH of le.

! lI

ENVIROWENTAL RADIOLOGICAL PROGRAN StfMARY VERN0NT YAEEE WCLEAR POER STATION. VERNON. VT JMIARY - DECDGER 1984 EDRM: MILK LNITS: PCI/KG I E !CATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS ee ..e . e e.

MDIOWCLIBES EAN EAN EAN (NO. AMLYSES) EQUIRED RANGE STA. MNGE MNGE (N0N-ROUTIEle LLD NO. DETECTED.. NO. NO. DETECTED.e NO. DETECTED.*

RU-106 ( 48) (-4.1 1 14.3)E -1 21 ( 9.2 1 19.4)E -1 ( 9.2 2 19.4)E -1

( 0) (-1.8 - 2.0)E 1 (-7.1 - 17.5)E 0 (-7.1 - 17.5)E O

  • ( 0/ 36)* a( 0/ 12)e a( 0/12)e I-131 ( 48) 1. (-2.8 i 4.8)E -3 21 ( 5.3 1 8.7)E -3 ( 5.3 1 8.7)E -3

( 0) (-6.0 - 6.5)E -2 (-4.2 - 5.5)E -2 (-4.2 - 5.5)E -2 e( 0/ 36)e *( 0/ 12)e e( 0/12)e CS-134 ( 48) 15. (-7.0 t 1.2)E -1 12 (-2.8 i 1.7)E -1 (-3.6 t 3.7)E -1

( 0) (-2.0 - .6)E 0 (-1.3 - .6)E 0 (-1.9 - 2.0)E 0 e( 0/ 36)* *( 0/ 12)* e( 0/ 12)e CS-137 ( 48) 18. ( l.3 i .2)E O 21 ( 2.6 * .5)E 0 ( 2.6 i .5)E 0

( 0) (-2.1 - 4.5)E O ( 7.5 - 77.8)E -1 ( 7.5 - 77.8)E -1 e( 3/ 36)# e( 6/ 12)e *( 6/12)*

I M-140 ( 48)

( 0)

60. (-3.7 1

(-8.2 -

  • ( 0/ 36)*

3.7)E -1 3.2)E O 11 (-2.7 &

(-?.3 -

  • ( 0/ 12)e 6.0)E -1 2.7)E 0

(-7.81

(-2.6 -

  • ( 0/121e 3.3)E -1

.9)E 0 E-141 ( 48) ( 3.0 t 3.9)E-1 12 ( !.! t .9)E O (-8.5 i 68.6)E -2

( 0) (-4.3 - 5.1)E 0 (-4.3 - 5.1)E O (-4.9 - 3.2)E 0 e( 0/ 36)* e( 0/ 12)e *( 0/12)*

CE-144 ( 48) (-1.2 & 8.7)E -1 12 ( 2.3 2 1.1)E 0 (-7.3 1 20.7)E -1

( 0) (-1.0 - 1.2)E 1 (-5.9 - 8.0)E 0 (-1.1 - .8)E 1

  • ( 0/ 36)e et 0/ 12)e of 0/ 12)*

l TH-232 ( 48) ( 9.2 1 5.8)E-1 12 ( 9.6 i 8.9)E -1 (-3.1 i 9.4)E -1

( 0) (-5.4 - 9.8)E 0 (-3.5 - 5.9)E 0 (-5.0 - 5.4)E 0 e( 0/ 36)e et 0/ 12)e el 0/ 12)e e NONf0VTIE ETERS TO TE IUSER OF SEPARATE EAST # DENTS leflCH ERE GREATER

, g THAN TEN (10) TIES TE AVERAGE MCKmotse FOR TE PERIOD OF TE REPORT.

ll i

    1. THE FRACTION OF SMFLE ANALYSES YIllDING DETECTABLE EASLRDe(TS II.E. 23 STD DEVIATIONS) IS I E ICATED WITH #( Je.

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D) Mixed Vegetation I Mixed vegetation samples were collected during June, August, and October from the nine air sampling locations. The vegetation consisted of various types of grasses and were analyzed for gamma emitting nuclides. The results of the gamma spectroscopy analysis on each sample showed that in addition to naturally occurring De-7 K-40, and Th-232, Cs-137 was detected on many samples. The levels detected in 1984 are consistent with those measured in previous years, which were shown to have originated from nuclear weapons testing fallout.

Snow cover and lack of the proper vegetation prevented a fourth quarterly sample from being collected during 1904.

I I ENVIROPfENTAL RADIOLOGICAL PROGRAM SlffMRY VERMONT YAf0(EE WCLEAR POER STATION. VERNON VT I EDIlM: MIXED WGETATION JANUARY - DECE)SER 1984 lNITS: FCI/KG WET

!EICATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS

. ..e. .ee.. e ee.

RADIOWCLIDES EAN EAN EAN (NO. ANALYSES) REQUIED RANGE STA. RANGE MNGE (N0lH10lfTIE)* LLD NO. DETECTED ** NO. NO. DETECTED ** NO. DETECTED.*

K-7 ( 27) ( 1.5 i .4)E 3 14 ( 3.0 1 2.3)E 3 - ( 8.8 1 1.2)E 2

( 0) ( 3.6 - 76.1)E 2 ( 7.1 - 76.1)E 2 ( 4.0 - 14.0)E 2 et 17/ 18)* *( 3/ 3)* *( 9/ 9)*

K-40 ( 27) ( 4.4 i .3)E 3 12 ( 5.7 2 1.1)E 3 ( 5.1 i .4)E 3

( 0) ( 2.5 - 7.4)E 3 ( 3.5 - 7.4)E 3 ( 2.7 - 6.7)E 3 et 18/ 18)e e( 3/ 3)* *( 9/ 9)t 79F54 ( 27) ( 3.2 i 1.4)E O 23 ( l.2 i .7)E 1 ( 1.0 1 3.8)E O

( 0) (-5.7 - 18.9)E O ( 2.5 - 26.5)E 0 (-1.4 - 2.7)E 1 et 0/ 18)e *( 0/ 3)* *( 0/ 9)#

CO-58 ( 27) (-1.4 i 4.4)E 0 13 ( 1.2 1 1.6)E I (-3.8 1 33.9)E -1 I ( 0) (-3.3 -

  • ( 0/ 18)*

4.1)E I (-1.1 -

e( 0/ 3)*

4.1)E 1 (-1.5 -

  • ( 0/ 9)e 1.9)E 1 I CD-60 ( 27)

( 0)

( 1.3 i

(-2.7 -

  • ( 0/ 18)*

2.7)E O 2.0)E I 15 ( 1.4 i

( 1.3 -

  • ( 0/ 3)e

.2)E 1 1.7)E 1

( 4.8 1 3.5)E O

(-9.9 - 20.8)E O

  • ( 0/ 9)e l ZN-65 ( 27) ( 6.0 1 10.6)E O 12 ( 3.8 1 1.3)E 1 (-5.1 i !!.6)E O

( 0) (-6.5 - 9.1)E 1 ( 1.9 - 6.3)E 1 (-5.8 - 5.9)E 1

  • ( 0/ 18)* a( 0/ 3)* .( 0/ 9)*

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l ZR-95 ( 27) ( 8.0 1 39.8)E -1 12 ( 9.5 i 14.5)E 0 (-8.8 1 7.0)E O

( 0) (-2.2 - 3.9)E 1 (-5.7 - 38.5)E O (-4.5 - 2.3)E 1 et 0/ 18)e *( 0/ 3)* *( 0/ 9)*

All-103 ( 27) (-1.1 i 1.4)E 0 23 ( 3.9 i 9.9)E O (-8.0 t 5.9)E O l ( 0) (-9.4 - 9.3)E 0 (-1.4 - 2.0)E 1 (-4.0 - 2.0)E I

  • ( 0/ 18)s *( 0/ 3)# *( 0/ 9)*

AlH 06 ( 27) ( l.5 i 1.8)E 1 12 ( 7.7 1 6.0)E 1 ( 2.1 1 49.3)E O l ( 0) (-8,5 - IB.7)E 1 (-4.3 - 14.0)E 1 (-3.1 - 1.5)E 2 l #( 0/18)* *( 0/ 3)* *( 0/ 9)e e REFERS TO TE JOSER OF SEPARATE EASLEEENTS IMICH WERE CREATER

==#THAN TEN (10) TIES TE AVCRAGE BACXOR0lMD FOR TE PERIOD OF TE REPORT.

    • TE FRACTION OF SAPPLE ANALYSES YIELDING DETECTABLE EASLREENTS (I.E. >3 STD DEVIATIONS) IS Il0!CATED WITH *( le.

I ENVIR0ffENTAL RADIOLOGICAL PROGRAM SlfMARY VERMONT YAM (EE MJCLEAR POER STATION, VERNON VT I ED!lM: MIXED VEGETATION JANUARY - DECEFEER 1984 lNITS: PCI/KG ET INDICATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS seM*MMMMfMM MMetMfMeteMMffMMe MMffM4HteeH RADIOMJCLIDES EAN EAN EAN (NO. ANALYSES) EQllIRED RANGE STA. RANGE RANGE (NDPH10llTIE)e LLD NO. DETECTEDM NO. NO. DETECTEDet NO. DETECTED +e I-131 ( 27) ( 2.1 1 2.5)E 1 11 ( !.2 i .8)E 2 ( 5.3 1 3.3)E 1

( 0) (-1.2 - 3.0)E 2 (-7.9 - 254.0)E 0 (-1.7 - 26.2)E 1

  • ( 0/ 18)* *( 0/ 3)* et 0/ 9)*

CS-134 ( 27) (-1.4 i .3)E 1 21 ( 3.4 i 1.4)E O (-6.2 1 6.4)E 0

( 0) (-5.1 - .7)E 1 ( 7.9 - 54.2)E -1 (-4.9 - .9)E 1

  • ( 0/ 18)* *( 0/ 3)e f( 0/ 9)*

CS-137 ( 27) ( 8.3 1 3.0)E 1 15 ( 2.1 1 1.6)E 2 ( l.2 i 1.2)E 1

( 3) ( 6.6 - 528.0)E O ( !.3 - 52.8)E i (-4.4 - 9.7)E 1

  • ( 10/ 18)* *( 2/ 3)e *( 1/ 9)*

BA-140 ( 27) (-2.4 1 1.3)E 1 21 ( 2.8 i 4.4)E 1 (-3.2 i 3.3)E 1 I ( 0) (-1.5 -

  • ( 0/ 18)*

.6)E 2 (-2.9 - 11.4)E 1 e( 0/ 3)*

(-2.3 -

  • ( 0/ 9)*

1.1)E 2 CE-141 ( 27) ( !.6 * .8)E ! 14 ( 3.4 1 3.1)E 1 ( 6.2 i 10.5)E O

( 0) (-1.9 - 9.4)E I (-3.5 - 94.3)E O (-4.8 - 5.7)E 1

  • ( 0/ 18)e *( 0/ 3)* *( 0/ 9)e CE-144 ( 27) ( !.4 i 1.1)E 1 15 ( 4.1 i 2.9)E I (-1.2 t 2.3)E 1

( 0) (-5.7 - II.4)E 1 ( 8.3 - 97.6)E 0 (-9.9 - 8.8)E 1 el 0/ 18)* *( 0/ 3)* et 0/ 9)*

TH-232 ( 27) ( 6.7 i 2.0)E 1 14 ( !.3 i 1.1)E 2 ( 6.2 i 2.0)E 1

( 0) (-4.0 - 34.9)E 1 ( 8.9 - 349.0)E O (-1.3 - 16.3)E 1

  • ( 1/ 18)* *( 1/ 3)* *( 1/ 9)*

I e NON-R0(JTIE REFERS TO TE R7EER OF SEPARATE EASLREENTS INIDI ERE GREATER THAN TEN (10) TIES TE A'ERAGE BACKGR0lN) FOR TE PERIOD OF TE REPORT.

H TE FRACTION OF SAPPLE ANALYSES YIELDING DETECTABLE EASlREENTS l (f.E. >3 STD DEVIATIONS) IS INDICATED WITH f( le.

II

A w 6m - - - - =--a - A Ji - ^ - -da'ah-*--*a-*+ - ^--a- -- *- - - 4--J J- M^ ---d - -- - -A h A- + h=-- - h* *a# - ^-

E) Food Crop No samples were available locally during 1984-I I

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F) Meat, Poultry, Eggs I No meat, poultry, or egg samples were available locally during 1984.  !

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G) Silage Silage samples were collected at the four milk sampling stations during 1984. Each sample was analyzed for gamma-emitting radionuclides, Sr-89 and Sr-90.

I Naturally-occurring Be-7 and K-40 were detected in all samples.

The only man-made radionuclide detected in silage was Sr-90 (in two of the four samples). The highest concentration, 43 i 4.6 pCi/kg, was in a sample from Station TC-13. Strontium-90 is associated with fallout from atmospheric nuclear weapons tests and the above level is consistent with well-documented environmental levels.

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I ENVIR0lfENTAL RADIOLOGICAL PP00RAN SlM%RY I

VERMONT YAKEE NUCLEAR POWER Shd!0N. VERNON. VT JAMJARY - DECE!EER 1984 EDIlM: SILAE LNITS: PCI/KG ET INDICATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS un+++n+e+enen n+++++ennun+en+nes enenten*+n+e RADIONJCLIDES EAN EAN EAN l' (NO. ANALYES) REQUIRED RANGE STA. RANGE IMNE (NONf0VTIE)e LLD NO. ETECTEDen NO. NO. DETECTEDee NO. DETECTED **

SR-89 ( 4) ( 3.4 1 55.8)E -1 21 ( !.3 i 1.0)E 1 (1.31 1.0)E 1

( 0) (-9.1 - 10.2)E O

  • ( 0/ 3)* *( 0/ 1)* *( 0/ 1)e SR-90 ( 4) ( 2.3 i 1.0)E 1 13 ( 4.3 i .5)E 1 ( 6.8 i 3.4)E O

( 8.0 - 43.1)E 0

( 2)

  • ( 2/ 3)* st 1/ 11e *( 0/ 1)*

BE-7 ( 4) ( 3.4 i 1.1)E 2 13 ( 5.5 1 .6)E 2 ( 2.1 i .4)E 2 I ( 0) ( 2.2 -

  • ( 3/ 3)*

5.5)E 2

  • ( 1/ 1)* *( 1/ lie

( !.4 I K-40 ( 4)

( 0)

( 2.3 i

( 2.0 -

  • ( 3/ 3)*

.2)E 3 2.7)E 3 11 ( 2.7 i

  • ( 1/ 1)*

.1)E 3

  • ( 1/ 1)*

.1)E 3 E-54 ( 4) ( 6.0 i 3.1)E O 12 (1.21 .4)E 1 ( 3.4 1 3.6)E O

( 0) ( 2.3 - 12.2)E O

  • ( 0/ 3)* el 0/ 1)* *( 0/ 1)*

CO-58 ( 4) (-2.7 i .3)E O  !! (-2,1 t 3.7)E O (-4.3 i 4.1)E O

( 0) (-3.3 - -2.1)E O el 0/ 3)* f( 0/ 1)e *( 0/ 1)e CD-60 ( 4) (-1.9 i 4.3)E O 12 ( 5.8 t 6.0)E O (-3.5 1 6.2)E O

( 0) (-9.0 - 5.8)E O a( 0/ 3)* *( 0/ 1)* *( 0/ 1)#

ZN-65 ( 4) ( 6.4 i 3.6)E O 12 (1.31 1.2)E 1 ( 3.7 i 8.2)E O

( 0) ( 7.4 - 131.0)E -1 ef 0/ 3)* *( 0/ 1)* a( 0/ 1)*

ZR-95 ( 4) (-1.1 i 3.9)E 0 13 ( 3.7 i 10.4)E O (1.51 7.7)E O

( 0) (-8.8 - 3.7)E O

  • ( 0/ 3)* *( 0/ 1)* *( 0/ 1)*

I e NON40UTIE REFERS TO TE NLMBER OF SEPARATE EASlEEPENTS lei!CH WERE GREATER

  • e THAN TEN (10) TIES TE AVERAGE BACK0ROLN) FOR THE PERIOD OF TE REPORT.

TE FRACTION OF SAPPLE ANALYSES YIELDIND DETECTABLE EASlRDENTS (I.E. >3 STD DEVIATIONS) IS INDICATED WITH *( le.

I

I ENVIR0 MENTAL RADIOLOGICAL PROGRAN StiflARY VERMONT YAEEE MJCLEAR POWER STATION, VERNON, VT I EDILM: SILAGE JANUARY - DECEMBER 1984 LNITS: PCI/KG ET IEICATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS neen++++++eneee enn++e+e++ +e***++++++n *eenen+++we*e I

RADIONUCLIDES EAN MEAN EAN (ND. ANALYSES) REQUIRED RANGE STA. RANGE RANGE (NON-ROUTIE)s LLD NO. DETECTEDee NO. NO. DETECTEDee NO. DETECTED +e I RU-103 ( 4)

( 0)

( l.1 i

(-2.5 -

2.1)E O 4.6)E O 12 ( 4.6 i 5.6)E O (-6.5 1 4.3)E 0 if 0/ 3)* *( 0/ 1)* a( 0/ 1)*

RU-106 ( 4) ( !.3 i 2.0)E 1 12 ( 4.8 i 3.7)E 1 (-5.7 1 3.6)E 1

( 0) (-1.9 - 4.8)E 1 e( 0/ 3)e *( 0/ lle f( 0/ 1)e I-131 ( 4) (-5.5 1 24.6)E O 13 ( 4.3 1 2.1)E 1 ( 3.8 t 16.7)E 0 I ( 0) (-3.5 -

el 0/ 3)*

4.3)E 1

  • ( 0/ 1)* *( 0/ 1)*

I CS-134 ( 4)

( 0)

(-2.4 i

(-5.1 -

  • ( 0/ 3)*

1.3)E 0

.7)E O 12 (-6.8 1 53.9)E -1 e( 0/ 1)*

(-1.2 i

  • ( 0/ 1)s

.5)E 1 CS-137 ( 4) ( 2.7 i 3.6)E O 13 ( 9.3 1 4.6)E 0 ( 4.7 i 3.9)E 0

( 0) (-2.9 - 9.3)E O

  • ( 0/ 3)* *( 0/ 1)* a( 0/ 1)*

IVr-140 ( 4) (-1.1 2 1.0)E 1 12 ( 5.7 t 128.0)E -1 (-1.2 i 1.1)E 1

( 0) (-3.1 - .1)E 1

  • ( 0/ 3)e *( 0/ 1)* *( 0/ 1)*

CE-141 ( 4) ( 5.1 1 6.8)E 0 13 ( !.6 i .7)E 1 ( 8.1 1 6.7)E O

( 0) (-7.3 - 16.1)E O f( 0/ 3)e *( 0/ 1)* *( 0/ 1)*

CE-144 ( 4) ( 4.2 1 3.0)E 0 21 ( !.61 2.0)E 1 ( !.6 1 2.0)E 1

( 0) ( 8.9 - 103.0)E -1 l

i

.I *( 0/ 3)* e( 0/ 1)* *( 0/ 1)+

l TH-232 ( 4) ( !.0 i 1.1)E 1 12 ( 2.6 1 1.7)E 1 (-1.2 1 1.8)E 1

( 0) (-9.7 - 26.3)E O

  • ( 0/ 3)* *( 0/ !)* *( 0/ lie l

I I

e NON-ROUTIE REFERS TO TE NMER OF SEPARATE EASLREENTS lei!CH ERE GREATER THAN TEN (10) TIES TE AVERAGE BACXOROLN) FOR TE PERIOD OF TE EPORT.

    • T}E FRACTION OF SAELE ANALYSES YIELDINO DETECTABLE EAStREENTS (I.E. >3 STD DEVIATIONS) IS I EICATED WITH ef )*.

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H) Ground Water Ground water grab samples were collected from three indicator and I one control station un a quarterly basis. These samples were analyzed for H-3, gross-beta, and gamma-emitting radionuclides.

Gross-beta radioactivity was detocted in indicator and control stations during 1984 and the concentrations are typical of those made over the past few years.

No other radionuclides were detected in the 1984 ground water samples.

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ENVIR0ffENTAL RADIOLOGICAL PROGRAN SlNIARY VERMONT YAREE MJCLEAR POER STATION VERNON VT JANUARY - DECEMBER 1984 I~ EDILM: GROLND WATER LMITS: PCI/KG IM)lCATOR STATIONS STATION WITH HIGEST PEAN CONTROL STATIONS ee.-.- ee . - - -

MDIOMJCLIDES EAN EAN PEAN I (NO. AMLYSES) EQUIRED RANGE (NON-ROUTIE)e LLD NO. DETECTED **

STA. RANCE NO. NO. IETECTEDet MNGE NO. DETECTED **

(R-B ( 16) 4. ( 7.3 i 1.7)E O 13 ( !.4 i .2)E 1 ( !.7 i .6)E O

( 1) ( 1.3 - 17.9)E O ( 8.0 - 17.9)E O ( 5.6 - 35.0)E -1 ef !!/ 12), af 4/ 4)e f( 3/ 4)e I BE-7 ( 16)

( 0)

(-1.3 i 19.3)E -1

(-1.2 - .9)E 1 11 ( 3.8 1 1.7)E O

( 3.0 - 84.0)E -1

(-2.4 1 10.4)E -1

(-2.1 - 2.4)E O e( 0/ 12)* *( 0/ 4)e *( 0/ 4).

K-40 ( 16) (-1.4 1 3.2)E O 21 ( 3.1 i 12.1)E O ( 3.1 i 12.1)E O

( 0) (-2.2 - 1.5)E 1 (-2.6 - 2.5)E 1 (-2.6 - 2.5)E 1 e( 0/ 12)e e( 0/ 4)e *( 0/ 4)*

l9f-54 ( 16) 15. ( 2.0 i 1.6)E -1 13 ( 7.6 i 1.0)E -1 (-8.3 1 3.6)E -1 I ( 0) (-8,5 - 10,5)E -1 et 0/ 12)e

( 6.2 - 10.5)E -1 f( 0/ 4)e

(-1.8 -

a( 0/ 4)e

.2)E O CO-58 ( 16) 15. (-3.9 i 3.0)E -1 13 (-6.4 1 70.6)E -2 (-4.5 i 1.7)E -1

( 0) (-2.0 - 1.1)E O (-2.0 - 1.1)E O (-6.9 - .7)E -1

  • ( 0/ 12)e *( 0/ 4)* e( 0/ 4)*

CO-60 ( 16) 15. (-3.2 i 2.6)E -1 21 ( 3.1 i 6.4)E -1 ( 3.1 i 6.4)E -1

( 0) (-2.0 - 1.0)E O (-7.9 - 17.4)E -1 (-7.9 - 17.4)E -1 a( 0/ 12)e *( 0/ 4)e *( 0/ 4)e

!lB ZW65 ( 16) 30. ( 1.1 i .3)E O 13 ( !.! i .8)E 0 (-2.0 i 6.3)E -1 l ( 0) (-5.9 - 29.4)E -1 (-5.9 - 29.4)E -1 (-1.5 - .9)E O l #( 0/ 12)* *( 0/ 4)* *( 0/ 4)e I

i ZR-95 ( 16) 30. (-1.6 1 4.1)E -1 12 ( 3.8 i 6.7)E -1 (-1.8 i .8)E O l

( 0) (-2.4 - 2.0)E O (-1.1 - 1.9)E O (-3.8 - .2)E O e( 0/ 12)e et 0/ 4)# a( 0/ 4)e ,

E 103 ( 16) (-1.1 i .1)E O 21 (-6.3 1 2.5)E -1 (-6.3 i 2.5)E -1

( 0) (-1.9 - .4)E 0 (-1.1 - .1)E 0 (-1.1 - .1)E O l et 0/ 12)e f( 0/ 4)e #( 0/ 4)e l

l e NDHOUTIE REFERS TO TE IUIBER OF SEPARATE EASLREPENTS leilCH ERE GREATER i

I TMN TEN (10) TIES TE AVERAGE BACKGROLND FOR TE PERIOD OF TE REPORT.

TE FRACTION 0F SAPPLE ANALYSES YIELDING DETECTABLE EASLRDENTS (I.E. >3 STD DEVIATIONS) IS INDICATED WITH ef )*.

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!E r l

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ENVIR0 MENTAL RADIOLOGICAL PROGRAM SlffMRY VERMONT YAM (EE MJCLEAR P0lER STATION, VERNON, VT I EDILM: GROUO WATER JANlMRY - NCEMBER 1984 lNITS: PCI/KG IM)ICATOR STATIONS STATION WITH HIGEST M CONTROL STATIONS

. . e.e e..e s. .. ...s.......

RADIOK)CL! DES M M M I (ND. A M LYSES) RE0llIRED RANGE (NON-R0llTIE)* LLD NO. ETECTED STA. RANGE NO. NO. DETECTED.*

RANE NO. DETECTED.*

Rll-106 ( 16) (-7.2 i 21.3)E -1 12 .( 1.6 1 40.5)E -1 (-6.6 i 13.1)E -1

( 0) (-1.1 - 1.2)E 1 (-5.3 - 12.2)E 0 (-3.6 - 2.8)E O e( 0/ 12)e f( 0/ 4)* f( 0/ 4).

I-131 ( 16) 1. (-7.0 i 10.7)E -1 12 ( 2.5 t 2547.1)E -3 (-1.8 i .6)E O

( 0) (-7.5 - 3.9)E 0 (-7.5 - 3.9)E O (-2.6 - .1)E O

  • ( 0/ 12)* f( 0/ 4)* *( 0/ 4)*

CS-134 ( 16) 15. (-2.0 i 1.7)E -1 13 ( !.2 i 1.5)E -1 (-3.5 t 2.7)E -1

(-1.5 - .5)E O (-1.6 - 4.7)E -1 (-1.1 - .2)E O I

( 0) e( 0/ 12)* *( 0/ 4)* *( 0/ 4).

CS-137 ( 16) 18. (-2.4 i 34.1)E -2 12 ( 6.8 i 2.8)E -1 (-2.5 i 4.4)E -1 I ( 0) (-1.9 -

  • ( 0/ 12)#

1.4)E O ( 1.7 - 13.2)E -1

  • ( 0/ 4)e

(-1.4 -

ei 0/ 4).

.6)E O BA-140 ( 16) 60. (-1.1 i .5)E O 21 (-3.2 i 13.7)E -1 (-3.2 t 13.7)E -1

( 0) (-4.4 - 1.3)E 0 (-2.6 - 3.2)E O (-2.6 - 3.2)E O

  • ( 0/ 12)e *( 0/ 4)* *( 0/ 4)*

CE-141 ( 16) ( 3.4 i 4.0)E -1 11 ( 9.1 i 2.1)E -1 (-1.1 i .4)E 0

( 0) (-3.5 - 2.0)E O ( 3.3 - 13.3)E -1 (-1.8 - .2)E O

  • ( 0/ 12)e *( 0/ 4). *( 0/ 4).

CE-144 ( 16) ( 4.1 i 14.5)E -1  !! ( 4.9 k 2.5)E O (-3.3 t 1.2)E O

( 0) (-6.7 - !!.3)E 0 ( 3.4 - 113.0)E -1 (-6.3 - .5)E O e( 0/ 12)e *( 0/ 4). *( 0/ 4).

RA-226 ( 4) ( 2.5 t .5)E -1 11 ( 3.4 i 1.8)E -1 ( 2.7 i 1.6)E -1

( 0) ( !.6 - 3.4)E -1 a( 0/ 3)* *( 0/ 11 *( 0/ Ile

! TH-232 ( 16) ( 5,2 t 9.7)E -1 11 ( 2.3 i .6)E 0 (1.61 1.4)E O

( 0) (-6.8 - 4.9)E 0 ( 8.3 - 37.0iE -1 (-1.0 - 5.5)E 0 et 0/ 12). *( 0/ 4)* et 0/ 4).

H- 3 ( 16) 2000. ( !.5 t .4)E 2 11 ( 1.9 i .8)E 2 ( 9.0 i 4.3)E 1

! ( 0) (-1.1 - 4.1)E 2 (-1.1 - 36.3)E 1 ( 0.0 - 2.0)E 2 et 0/ 121e f( 0/ 4). *( 0/ 4)*

l

[

'; e NON-ROUTIE REFERS TO TE Rf9ER OF SEPARATE EAStREENTS lel!CH IERE GREATER

! THAN TEN (10) TIES TE AVERAE BACKGROLND FOR TE PERIOD OF TE REPORT.

l TE FRACTION OF SMFLE ANALYSES YIELDING DETECTABLE EASLIREENTS (I.E. >3 STD DEVIATIONS) IS INDICATED WITH *( le.

,I l

I I) River Water I River water is analyzed monthly for gross-beta and gamma-emitting radionuclides. The monthly samples are composited and analyzed for H-3 on a quarterly basis. A composite sampler is used at Station WR-11 and grab samples are taken at the other two stations.

I Gross-beta radioactivity was detected in all but four samples during 1984. The mean value, as well as the range of values, for the indicator stations was similar to that of the control station, indicating that those radionuclides detected are not due to plant operations.

Tritium (H-3) was detected in one sample from Station WR-11 (420 t 140 pCi/kg). This concentration is marginally detectable, and will I in any case have no impact on man since the river water is used neither for drinking water or irrigation. It is unlikely that the radioactivity could have originated from the plant, since there were no liquid effluents released during 1984.

No other radionuclides were detected in the 1984 river water samples.

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I _- - -_

E)WIR0ffelTAL RADIOLOGICAL PR00RAN StPMARY

  • VERMONT YAEEE NUC1. EAR POER STATION VERNON, VT I EullM: RIVER ETER JANUARY - DECEMBER 1984 LNITS: PCI/KG I2ICATOR STATIONS STATION WITH HIGEST M CONTROL STATIONS e e ee. ee ee e*e ..ef.** e.e e RADIONJCLII)ES EAN EAN M I M. ANALYSES) REQUIRED RANGE (NON-R0tJTIEle LLD NO. DETECTED **

STA. RANGE NO. NO. DETECTED RANGE NO. DETECTEDee CR-B ( 36) 4. ( 2.0 i .1)E O 12 ( 2.2 i .2)E O ( 2.0 i .2)E 0

( 0) ( 8.3 - 30.0)E -1 ( !.6 - 3.0)E 0 ( 7.1 - 33.8)E -1 e( 21/ 24). *( 12/ 12)e *( !!/ 12).

BE 7 ( 36) (-1.3 i 15.0)E -1 21 ( 4.1 1 2.0)E 0 ( 4.1 i 2.0)E 0

( 0) (-1.4 - 1.7)E I (-9.3 - 15.0)E O (-9.3 - 15.0)E O

  • ( 0/ 24)* *( 0/ 12)* *( 0/ 12)*

l K-40 ( 16) (-2.3 1 2.5)E O 12 (2.81 2.2)E O (-2.7 i 3.5)E O

( i) (-3.1 - 1.5)E 1 (-1.3 - 1.5)E 1 (-2.6 - 1.4)E 1

  • ( 0/ 24)* e( 0/ 12)e f( 0/ 12)*

IW-54 ( 36) 15. (-6.9 i 18.5)E -2 12 ( 2.0 i 1.9)E -1 ( 9.8 i 203.6)E -3

( 0) (-2.1 - 1.6)E O (-1.1 - 1.4)E 0 (-1.5 - 1.1)E O I

a( 0/ 24)* f( 0/ 12)e f( 0/ 12)*

l C0-58 ( 36) 15. (-5.4 i 1.8)E -1 21 (-2.9 1 2.3)E -1 (-2.9 i 2.3)E -1

( 0) (-2.2 - 1.0)E O (-2.1 - .6)E O (-2.1 - .6)E 0

*( 0/ 24)e *( 0/ 12)* *( 0/ 12).

CIHK) ( 36) 15. (-5.2 i 2.1)E -1  !! (-3.8 i 3.1)E -1 (-4.3 i 2.7)E -1 1

( 0) (-2.3 - 1.5)E O (-2.1 - 1.3)E O (-2.4 - 1.0)E O l *( 0/ 24)e f( 0/ 12)* *( 0/ 12)*

ll i

E ZN-65 ( 36)

( 0)

30. ( 4.7 1 34.7)E -2

(-4.2 -

  • ( 0/ 24)e 3.5)E O 12 ( 2.8 i

(-4.2 -

f( 0/ 12)*

5.9)E -1 3.5)E O

(-9.5 i

(-3.6 -

  • ( 0/ 12)*

4.2)E -1 1.6)E O l

i ZR-95 ( 36) 30. (-1.6 i 2.7)E -1 12 (-9.6 1 29.4)E -2 (-5.5 1 6.2)E -1 l ( 0) (-3.4 - 2.1)E 0 (-1.7 - 1.1)E O (-3.9 - 4.6)E O e( 0/ 24)* e( 0/ 12)* *( 0/ 12).

! R)-103 ( 36) (-1.1 t .1)E O 11 (-8.31 2.1)E -1 (-1.1 i .4)E O

.5)E 0 I ( 0) (-2.7 -

  • ( 0/ 24)e

.6)E O (-1.8 -

  • ( 0/ 121e

.8)E O (-3.7 -

e( 0/ 12)

I . NONit0tlTIE REFERS TO TE NLMBER OF SEPARATE EASlREENTS WICH ERE GREATER I TMN TEN (10) TIES TE AVERAGE BACKGROUND FOR TE PERIOD OF TE REPORT.

e. TE FRACTION OF SAPPLE AMLYSES YIELDING DETECTABLE EASIREENTS (I.E. >3 STD DEVIATIONS) IS I 2 ICATED WITH *( )*.

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I EWIR0ffENTAL RADIOLOGICAL PROGRAN Slft1ARY VERMONT YAf0(EE WCLEAR POER STATION VERNON, VT i

I EDilff: RIVER IAATER JANUARY - DECEMBER 1984 UNITS: PCI/KG IE!CATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS e.ee. ee..e ee .* e.ee. e .ee .

RADIONJCLIDES EAN EAN EAN I (NO. ANALYSES) REQUIRED RANGE (NON-ROUTIE)* LLD NO. DETECTED.,

STA. PANGE NO. NO. DETECTED.*

RANGE NO. DETECTED **

RU-106 ( 36) (-4.3 1 1.2)E 0 21 ( 2.6 1 21.7)E -1 ( 2.6 1 21.7)E -1

( 0) (-1.8 - .5)E 1 (-1.8 - 1.2)E 1 (-1.0 - 1.2)E 1 e( 0/ 24)e et 0/ 12)e e( 0/ 121e I-131 ( 36) ( !.4 i .5)E O 11 ( !.6 i .9)E O (-6.2 i 7.8)E -1

( 0) (-1.8 - 9.4)E O (-1.8 - 9.4)E O (-6.4 - 3.4)E O

  • ( 0/ 24)* *( 0/ 12)e *( 0/ 12).

CS-134 ( 36) 15. (-3.2 1 1.6)E -1 12 (-2.7 1 2.6)E -1 (-9.5 1 3.0)E -1

(-2.3 - 1.0)E O (-1.7 - 1.0)E 0 (-2.5 - 1.0)E O I

( 0)

  • ( 0/ 24)* *( 0/ 12)e a( 0/ 12)e CS-137 ( 36) 18. (-1.4 i 1.7)E -1 12 ( 1.4 i 20.1)E -2 (-5.1 i 17.3)E -2 I ( 0) (-1.8 -
  • ( 0/ 24)e 1.2)E O (-1.1 -
  • ( 0/ 12)e

.9)E 0 (-1.1 -

et 0/ 12)*

.6)E O I BA-140 ( 36)

( 0)

60. (-4.4 i

(-5.9 -

  • ( 0/ 24)*

5.0)E -1 4.7)E O 11 (-5.9 1 76.4)E -2

(-4.2 -

  • ( 0/ 12)*

4.7)E O

(-5.1 i

(-2.7 -

e( 0/ 12).

4.4)E -1 1.4)E O CE-141 ( 36) ( !.5 i 3.2)E -1 21 ( 4.2 1 4.5)E -1 ( 4.2 i 4.5)E -1

( 0) (-3.1 - 3.4)E O (-2.5 - 2.6)E O (-2.5 - 2.6)E O e( 0/ 24)* *( 0/ 12)* #( 0/ 12)e CF-144 ( 36) (-8.0 i 10.7)E -1 11 (-3.9 1 13.4)E -1 (-1.5 i 1.4)E O i ( 0) (-10. - 11.2)E O (-10. - 7.9)E O (-7.9 - 4.9)E O

. E *( 0/ 24). *( 0/ 12)* ef 0/ 12)*

l l TH-232 ( 36) ( 7.3 i 6.0)E -1 11 ( !.9 i .8)E 0 (-6.1 1 7.7)E -1

( 0) (-4.3 - 8.7)E O (-2.2 - 8.7)E O (-4.3 - 4.1)E O i  ;

et 0/ 24)* a( 0/ 12)e et 0/ 12)e l H-3 ( 12) 2000. ( 6.8 i 7.1)E 1 11 ( !.3 i 1.4)E 2 ( 3.7 i 10.0)E 1 l ( 1) (-2.2 - 4.2)E 2' (-2.2 - 4.2)E 2 (-2.4 - 2.3)E 2

  • ( 1/ 8)* *( 1/ 4)* et 0/ 4)e e NON-R0llTIE REFERS TO TE Mf9ER OF SEPARATE EASLRDENTS 14CCH ERE GREATER I THAN TEN (10) TIES TE AVERAGE BACKGROUND FOR TE PERIOD OF TE REPORT.
    • TE FPACTION OF SAfFLE AMLYSES YIELDING DETECTABLE EASLREENTS (I.E. 23 STD DEVIATIONS) IS INDICATED WITH *( le.

g -35

I J) Aquatic Vegetation

.I Twice during 1984, cattail samples were collected from one I indicator and one control location. Each sample was analyzed for gamma-emitting radionuclides. Other than naturally-occurring K-40 and Be-7, no radionuclides were detected.

I I

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I ENVIR0ffENTAL RADIOLOGICAL PROGRAM SlffMRY YERMONT YAff(EE NUCLEAR POWER STATION, VERNON, VT

I EDilff
AQUATIC VEGETATION JANUARY - DECDEER 1984 UNITS: PCI/KG ET IM)ICATOR STATIONS STATION WITH HIGEST EAN C0NTROL STATIONS

.. . . ..e ..

RADIONJCLIDES EAN M M (ND. ANALYSES) EQUIRED RANGE STA. RANGE RANCE (NON-ROUTINE)* LLD NO. DETECTED.* NO. NO. IETECTED.+ NO. DETECTED.*

BE-7 ( 4) ( 2.6 i 1.9)E 2  !! ( 2.6 i 1.9)E 2 ( 2.5 1 2.2)E 2

( 0) ( 6.6 - 44.9)E 1 ( 6.6 - 44.9)E 1 ( 2.6 - 46.9)E 1

  • ( 1/ 2)# *( 1/ 2). .( 1/ 2).

, K-40 ( 4) ( 2.6 1 1.0)E 3 21 ( 4.4 1 1.1)E 3 ( 4.4 i 1.1)E 3

( 0) ( 1.6 - 3.6)E 3 ( 3.3 - 5.6)E 3 ( 3.3 - 5.6)E 3

  • ( 2/ 2)* .( 2/ 2)* *( 2/ 2).

fW-54 ( 4) (-3.9 i 7.6)E 0 11 (-3.9 i 7.6)E 0 (-1.2 1 1.4)E 1

( 0) (-1.1 - .4)E 1 (-1.1 - .4)E 1 (-2.6 - .2)E 1

  • ( 0/ 2)* *( 0/ 21e *( 0/ 2).

CD-58 ( 4) ( 5.9 1 1.0)E O 21 ( 2.1 i .7)E 1 ( 2.1 i .7)E 1

( 0) ( 4.9 - 6.9)E O ( 1.4 - 2.8)E 1 ( 1.4 - 2.8)E 1

  • ( 0/ 2)e .( 0/ 2)* f( 0/ 2)*

CO-60 ( 4) (-6.6 i 7.2)E O 11 (-6.6 i 7.2)E O (-1.5 i 1.0)E 1

( 0) (-1.4 - .1)E 1 (-1.4 - .1)E 1 (-2.5 - .5)E 1 e( 0/ 2)* *( 0/ 2)* e( 0/ 2)e ZN-65 ( 4) ( !.4 1 23.2)E O 11 ( 1.4 i 23.2)E 0 ( 5.2 1 83.3)E -1

( 0) (-2.2 - 2.5)E 1 (-2.2 - 2.5)E 1 (-7.8 - 8.9)E O

  • ( 0/ 2). et 0/ 2)* .( 0/ 21 I ZR-95 ( 4)

( 0)

(-1.3

(-1.7 -

.3)E 1

-1.0)E 1 21 ( 2.4 1

(-2.5 -

4.9)E O 7.3)E 0

( 2.4 i

(-2.5 -

4.9)E O 7.3)E O

  • ( 0/ 2), f( 0/ 21e f( 0/ 2)*

RlF-103 ( 4) (-3.9 i 13.0)E -1 21 ( 7.9

  • 17.7)E 0 ( 7.9
  • 17.7)E 0

(-1.7 - .9)E 0 (-9.9 - 25.6fE 0 (-9.9 - 25.6)E O I

( 0)

  • ( C/ 2)# *( 0/ 2)* *( 0/ 2).

RU-106 ( 4) ( 2.3 1 4.0)E 1 11 ( 2.3 1 4.0)E 1 (-6.1 i 11.7)E 1

( 0) (-1,6 - 6.3)E 1 (-1.6 - 6.3)E 1 (-1.8 - .6)E 2 f( 0/ 2)* *( 0/ 2)e *( 0/ 2).

I I

e NON-ROUTIE REFERS TO TE NLIBER OF SEPARATE EASlREENTS WHICH ERE CREATER THAN TEN (10) TIES TE AVERACE BACKGROUND FOR THE PERIOD OF TE REPORT.

TE FRACTION OF SAfFLE ANALYSES YIELDING DETECTABLE EASlREENTS (I.E. >3 STD DEVIATIONS) IS INDICATED WITH *( le.

I ENVIR0l# ENTAL RADIOLOGICAL PROGRAM StfMARY I

VERMONT YANKEE NUCLEAR POWER STATION, VERNON. VT JAKIARY - DECEPEER 1984 EDIlfi: AQUATIC VEGETATION lNITS: PCI/KG ET INDICATOR STATIONS STATION WITH HIGEST M CONTROL STATIONS fifMffMffM* Hie MfMHHHfMHeHfffHe ef M HfM H fM M RADION.lCLIDES M M M (NO. ANALYSES) REQUIRED RANGE STA. RANGE RANGE (NON-ROUTIE)e LLD NO. DETECTEDie NO. NO. DETECTEDie NO. DETECTEDie I-131 ( 4) ( 2.0 1 3.7)E 1 11 ( 2.0 t 3.7)E 1 (-1.0 1 4.7)E 1

( 0) (-1.7 - 5.7)E I (-1.7 - 5.7)E 1 (-5.7 - > 3.7)E 1

  • ( 0/ 2)e *( 0/ 2)e *( 0/ 2)4 CS-134 ( 4) (-6.3 i 9.7)E O 11 (-6.3 1 9.7)E 0 (-9.2 i .2)E O

(-1.6 - .3)E 1 -(-1.6 - .3)E 1 (-9.4 - -9.0)E O I

( 0) ef 0/ 2)* *( 0/ 2)* f( 0/ 2)*

CS-137 ( 4) ( 8.8 i 9.0)E O 11 ( 8.8 i 9.0)E 0 (-4.3 i 2.1)E -1

( 0) (-1.7 - 178.0)E -1 (-1.7 - 178.0)E -1 (-6.4 - -2.2)E -1

  • ( 0/ 2)e -*( 0/ 2)* *( 0/ 2)e IM-140 ( 4) (-4.8 i 6.7)E 1 21 ( !.5 i 107.5)E -1 ( 1.5 i 107.5)E -1

( 0) (-1.1 - .2)E 2 (-1.1 - 1.1)E I (-1.1 - 1.1)E 1 et 0/ 2)e *( 0/ 2)* *( 0/ 2)*

CE-141 ( 4) ( 3.0 i .7)E 1 11 ( 3.0 i .7)E 1 ( 2.5 i 3.1)E 1

( 0) ( 2.2 - 3.7)E 1 ( 2.2 - 3.7)E 1 (-6.6 - 56.4)E O

  • ( 0/ 2)e *( 0/ 2)e *( 0/ 2)e CE-144 ( 4) (-5.9 i 2.8)E 1 21 (-4.2 i 8.0)E 1 (-4.2 1 8.0)E 1

( 0) (-8.7 - -3.1)E 1 (-1.2 - .4)E 2 (-1.2 - .4)E 2 et 0/ 2)* *( 0/ 2)e f( 0/ 2)f TH-232 ( 4) (-6.6 i 8.6)E 0 21 ( !.2 i 1.4)E 1 ( !.2 i 1.4)E 1

( 0) (-1.5 - .2)E 1 (-1.5 - 26.4)E O (-1.5 - 26.4)E 0 .

e( 0/ 2)s et 0/ 2)e f( 0/ 2)f

  • NON-ROJTIE REFERS TO TE Mf9ER OF SEPARATE !EASLEEENTS 14 tim ERE CREATER
TMAN TEN (10' TIES TE AVERAE BA70R0lND FOR TE PERIOD OF TT REPORT.

! n TE FR/CTION OF SAffLE ANALYSES YIELDING IE'ECTABLE 1(XtREENTS l (f.E. >3 STD DEV!ATIONS) IS INDICATED WITH *( le.

I I

K) Sediment

'I During 1984, sediment samples were collected from three locations in June and October. Each sample was analyzed for gamma-emitting radionuclides.

Cesium-137 was detected in all samples. As has been discussed in previous Vermont Yankee Radiological Environmental Surveillance Reports, this radioactivity has been due to nuclear weapons testing fallout. Since there were no liquid releases during 1982, 1983, or 1984, it can be concluded that the lower levels of Cs-137 in 1984 sediment samples were due also to nuclear weapons testing fallout.

I This is further supported by the fact that the highest levels were detected at Station Se-21, a control station.

Except for naturally-occurring Be-7, K-40, and Th-232, and the Cs-137 discussed above, no radionuclides were detected in sediment samples during 1984.

I I

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l I EWIR0lfENTAL RADIOLOGICAL PROGRAM SIMIARY VERMONT YAEEE MJCLEAR POER STATION. VERNON. VT l

)

l JAMJARY - DEC99ER 1984 EDIlff: SEDIlfNT LMITS8 PCI/KG DRY IEICATOR STATI(NS STATION WITH HIGEST EAN CONTROL STATIONS

_ .e.. _ e e MDIOMKI.II)ES EAN EAN EAN (NO. A M LYSES) REQll! RED RANGE STA. RANE MNE (NON-ROUTIE)* LLD NO. DETECTED ** NO. NO. DETECTED.e NO. DETECTED **

BE-7 ( 6) ( 4.5 i 5.8)E 1 11 ( 9.9 1 8.1)E 1 ( 5.4 i 6.6)E 1

( 1) (-9.9 - 18.0)E 1 ( 1.7 - 18.0)E 1 (-1.2 - 12.0)E !

  • ( 1/ 4)e a( 1/ 2)e *( 0/ 2)e K-40 ( 6) (10.0 i .9)E 3 11 ( !.1 i .1)E 4 ( 8.8 i .0)E 3

( 0) ( 7.8 - 11.8)E 3 ( 9.4 - !!.8)E 3 ( 8.8 - 8.8)E 3 e( 4/ 4)e *( 2/ 2)* .( 2/ 2)e f96-54 ( 6) (-1.6 i .3)E 1 21 (-4.5 1 6.6)E O (-4.5 i 6.6)E O

( 0) (-2.4 - -1.1)E 1 (-1.1 - .2)E 1 (-1.1 - .2)E 1 e( 0/ 4)e *( 0/ 2)* ef 0/ 2)*

CD-58 ( 6) (-4.2 1 4.9)E O 12 (-2.2 i !!.0)E O (-1.1 i .3)E 1 I ( 0) (-1.3 -

et 0/ 4)s

.9)E 1 (-1.3 -

  • ( 0/ 2)*

.9)E 1 (-1.4 -

et 0/ 2)e

.8)E 1 C0-60 ( 6) (-3.6 i 3.8)E O 21 ( 4.0 i 4.1)E O ( 4.0 i 4.1)E O

( 0) (-9.8 - 6.9)E O (-9.5 - 815.0)E -2 (-9.5 - 815.0)E -2 e( 0/ 4)e f( 0/ 2)e *( 0/ 2)*

ZN-65 ( 6) ( 2.0 1 9.1)E 0 11 ( 1.3 t .9)E 1 ( 4.6 i 10.2)E O

( 0) (-2.2 - 2.2)E 1 ( 3.6 - 22.2)E O (-5.5 - 14.8)E O

  • ( 0/ 4)* f( 0/ 2)* e( 0/ 2)*

ZR-95 ( 6) (-2.3 t 7.0)E 0 21 ( 3.5 i 1.6)E 1 ( 3.5 i 1.6)E 1

( 0) (-1.9 - 1.0)E 1 ( 1.8 - 5.1)E 1 ( !.8 - 5.1)E 1

  • ( 0/ 4)* f( 0/ 2)* *( 0/ 2)e RU-103 ( 6) ( 2.2 1 8.2)E 0 11 ( 9.6 1 3.4)E 0 ( 2.5 1 3.5)E O l g ( 0) (-2.2 - 1.3)E 1 ( 6.1 - 13.0)E O (-9.8 - 60.6)E -1

'g l

  • ( 0/ 4)* *( 0/ 2)* el 0/ 2)e RU-106 ( 6) ( !.8 2 1.5)E 1 12 ( 3.9 t 2.0)E 1 (-2.5 i 5.8)E 1 I ( 0) (-1.2 -

ef 0/ ()*

5.9)E 1 ( 1.9 - 5.9)E 1

  • ( C/ 2)*

(-8.3 -

et 0/ 2).

3.3)E 1 i

. NON-ROUTIE REFERS TO TE MfSER OF SEPARATE EAStmDENTS leIICH ERE GEATER I T)MN TEN (10) TIES TE AVERAGE BACK0ROLN) FOR TE PERIOD OF TE REPORT.

.* TE FRACTION OF SAPPLE ANALYSES YIELDING DETECTABLE EASLREENTS (I.E. >3 STD DEVIATIONS) IS I E ICATED WITH et )*.

I ENVIROMENTAL RADIOLOGICAL PROGRAM SIN %RY VERMONT YAM (EE WCLEAR POER STATION VERNON, VT JAMJARY - DECEMER 1984 ED!lM: SEDIENT LNITS: PCI/KO DRY IM)ICATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS e *.- ee _ *.*

RADIOMJ(lIDES EAN EAN EAN (ND. AMLYSES) REQUIRED RANGE STA. RANGE RANGE (NON-ROUTIE)* LLD NO. DETECTED *+ NO. NO. DETECTED.* NO. DETECTED **

I-131 ( 6) (-1.5 i 1.2)E 2 11 (-5.7 i 9.3)E I (-5.8 i 2.9)E 1

( 0) (-4.8 - .4)E 2 (-1.5 - .4)E 2 (-8.6 - -2.9)E 1

  • ( 0/ 4)* e( 0/ 2)e f( 0/ 2)e CS-134 ( 6) 150. ( 1.9 i 4.1)E O 12 ( 6.8 i 7.1)E O (-8.0 1 7.7)E O

( 0) (-4.8 - 13.9)E O (-2.8 - 139.0)E -1 (-1.6 - .0)E 1 ef 0/ 4). *( 0/ 2)* *( 0/ 2)*

CS-137 ( 6) 180. ( 8.0 1 1.9)E 1 21 ( l.2 1 0.0)E 2 ( 1.2 i 0.0)E 2

( 0) ( 3.7 - !!.9)E 1

  • ( 4/ 4)* *( 2/ 2)* e( 2/ 2)*

BA-140 ( 6) (-1.4 i 5.1)E 1 12 ( 4.4 1 9.2)E I (-8.9 i 1.5)E I

( 0) (-9.7 - 13.6)E 1 (-4.8 - 13.6)E 1 (-1.0 - .7)E 2 f( 0/ 4)* *( 0/ 2)* *( 0/ 2)*

I CE-141 ( 6)

( 0)

( 2.0 i

( 1.1 -

f( 0/ 4)*

.5)E 1 3.4)E I 11 ( 2.2 1

( 1.1 -

  • ( 0/ 2)e 1.1)E 1 3.4)E 1

(-1.6 1 45.3)E -1

(-4.7 -

f( 0/ 2)*

4.4)E 0 CE-144 ( 6) (-4.3 i 1.8)E 1 21 (-6.6 t 12.7)E 0 (-6.6 i 12.7)E 0

( 0) (-7.7 - .6)E 1 (-1.9 - .6)E 1 (-1.9 - .6)E 1

  • ( 0/ 4)* *( 0/ 2)* *( 0/ 2)*

TH-232 ( 6) ( 4.9 i .4)E 2 11 ( 5.5 i .4)E 2 ( 5.2 i .2)E 2

( 0) ( 3.8 - 5.9)E 2 ( 5.1 - 5.9)E 2 ( 5.0 - 5.4)E 2 et 4/ 4)e f( 2/ 2)* *( 2/ 2)e

'I e N(AHt0UTIE REFERS TO TE MMIER OF SEPARATE EASlREENTS Wi!CH ERE 0 EATER

, THAN TEN (10) TIES TE AVERAE BACKGt0lND FOR TE PERIOD OF TE REPORT.

l .* TE FRACTION OF S4PLE ANALYSES YIELDING DETECTABLE EASLREENTS (I.E. >3 STD DEVIATIONS) IS INDICATED WITH *( )*.

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I L) Finfish Twice during 1984, finfish samples were collected from each of three locations. Each sample consisted of mixed freshwater species. All were analyzed for gamma-emitting radionuclides.

Cesium-137 was detected in four of the six samples collected. As can be seen in the following data table, the mean and range for indicator stations are lower than those for the control stations, indicating that the radioactivity is not due to plant operations but to nuclear weapons testing fallout. The levels are lower than those detected in 1983, and are consistent with well documented environmental levels. No other radionuclides were detected except for naturally-occurring K-40.

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ENVIR0 MENTAL RADIOLOGICAL PROGRAM SLMtARY VERMONT YAMCEE MJCLEAR POER STATION, VERNON. VT JM)ARY - ECE)SER 1984 EDILM: FIEISH LNITS: PCI/KG ET IM)1CATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS M4HffMHHHfM fMHfMHffMHffMHeft fMfMHHHfHf RADIONJCLIDES ,

EAN EAN MEAN (ND. ANN.YSES) EQUIRED RANGE STA. RANGE MNCE (NON-R0tlTIE)* LLD NO. ETECTEDet NO. NO. DETECTEDe* NO. DETECTED **

l

BE-7 ( 6) ( 6.6 1 2.3)E 1 11 ( 7.0 i .2)E I (-6.7 i 6.1)E 1

(-1.3 - .1)E 2

( 0) ( 5.9 - !!8.0)E O ( 6.8 - 7.3)E 1 el 0/ 4)* et 0/ 2)* *( 0/ 2)*

K-40 ( 6) ( 3.0 t .2)E 3 21 ( 3.5 k .3)E 3 ( 3.5 i .3)E 3

( 0) ( 2.5 - 3.5)E 3 ( 3.2 - 3.7)E 3 ( 3.2 - 3.7)E 3

  • ( 4/ 4)* f( 2/ 2)* *( 2/ 2)*

IW-54 ( 6) 130. (-2.6 i 1.4)E O 12 (-5.7 i 13.9)E -1 (-3.0 1 6.7)E O

( 0) (-6.1 - .8)E O (-2.0 - .8)E 0 (-9.7 - 3.8)E O

  • ( 0/ 4)e f( 0/ 2)e el 0/ 2)e CD-58 ( 6) 130. ( 3.1 1 2.7)E O 12 ( 3.4 1 2.4)E O ( 2.8 i 4.0)E 0

( 0) (-3.4 - 9.0)E O ( 1.0 - 5.8)E 0 (-1.2 - 6.7)E O e( 0/ 4)* *( 0/ 2)e e( 0/ 2)*

CO-60 ( 6) 130. ( 3.8 t !!.3)E O 21 ( 2.2 t .7)E 1 ( 2.2 i .7)E 1

( 0) (-1.5 - 3.7)E 1 ( 1.4 - 2.9)E 1 ( 1.4 - 2.9)E 1 i *( 0/ 4)* el 0/ 2)e *( 0/ 21e l

! ZN-65 ( 6) 260. ( 8.9 1 16.6)E O 21 ( 2.0 t .1)E 1 ( 2.0 i .1)E 1

! ( 0) (-2.1 - 4.3)E 1 ( 1.8 - 2.1)E 1 ( 1.8 - 2.1)E 1

  • ( 0/ 2)e

'I f( 0/ 4)* el 0/ 2)*

l ZR-95 ( 6) ( !.2 i .6)E 1 12 ( 1.8 i .7)E 1 ( 5.9 i 6.3)E 0

( 0) (-2.6 - 25.5)E O ( 1.1 - 2.6)E 1 (-4.2 - 122.0)E -1 et 0/ 4)* e( 0/ 2)* ef 0/ 2)*

, RLH03 ( 6) ( 1.0 i .4)E I 11 ( !.5 i .5)E 1 (-1.7 f 14.6)E O

! ( 0) ( 3.2 - 19.8)E O ( 9.8 - 19.8)E O (-1.6 - 1.3)E 1

, el 0/ 4)* e( 0/ 2)* et 0/ 2)e Ril-106 ( 6) ( 8.9 1 23.1)E O 12 ( 4.7 t 1.4)E 1 (-7.7 1 3.4)E 1

( 0) (-3.6 - 6.2)E 1 ( 3.3 - 6.2)E 1 (-1.1 - .4)E 2 e( 0/ 4)e e( 0/ 2)e f( 0/ 2)e e NON-R0l) TIE REFERS TO TE NLf9ER OF SEPARATE EAStJREPENTS Mi!CH WERE GREATER I TMN TEN (10) TIES TE AVERAGE BACKGROLN) FOR TE PERIOD OF TE REPORT.

    • TE FRACTION OF SAPPLE ANALYSES YIELDING DETECTABLE EASLEEENTS (I.E. >3 STD DEVIATIONS) IS IPOICATED WITH f( 15

I EWIR0ffENTAL RADIOLOGICAL PROGRAN SLNMRY VERMONT YAM (EE WCLEAR POER STATION, VERNON. VT I EDilN: FIWISH JANijARY - DECEMBER 1984 LMITSI PCI/KG ET IM)ICATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS

- e. een - *.* _ -e MDIOMK2.! DES EAN EAN EAN (ND. ANALYSES) RE9)! RED RANGE STA. RANGE MNGE (NON-R0lf!IE)* LLD NO. EETECTED.* NO. NO. DETECTED ** NO. DETECTED **

I-131 ( 6) ( !.1 i .4)E 1 21 ( 2.2 i 1.9)E 1 ( 2.2 1 1.9)E 1

( 0) ( 4.6 - 21.1)E O ( 3.2 - 41.7)E 0 ( 3.2 - 41.7)E 0

  • ( 0/ 4)e f( 0/ 2)* *( 0/ 2)*

CS-134 ( 6) 130. ( 3.4 i 6.1)E 0 12 ( 7.0 i 13.8)E 0 (-3.7 1 2.2)E O

( 0) (-6.8 - 20.8)E O (-6.8 - 20.8)E O (-5.9 - -1.5)E O et 0/ 4)* f( 0/ 2)* *( 0/ 2)*

CS-137 ( 6) 150. ( 2.5 i .6)E 1 21 ( 6.4 i 2.3)E 1 ( 6.4 i 2.3)E 1

( 0) ( !.8 - 4.2)E 1 ( 4.1 - 8.6)E 1 ( 4.1 - 8.6)E 1

  • ( 2/ 4)* f( 2/ 2)s *( 2/ 21 94-140 ( 6) (-1.9 i .9)E 1 21 ( 2.4 i 6.8)E 0 ( 2.4 1 6.8)E 0

( 0) (-3.0 - .7)E 1 (-4.4 - 9.2)E 0 (-4.4 - 9.2)E O at 0/ 4)* f( 0/ 2)e et 0/ 2)*

I CE-141 ( 6)

( 0)

(-5.2 i

(-1.5 -

  • ( 0/ 4)*

3.4)E O

.1)E 1 12 (-8.0 1 20.8)E -1

(-2.9 -

a( 0/ 2)*

1.3)E 0

(-4.5 1

(-8.2 -

  • ( 0/ 2)*

3.7)E O

.9)E 0 CE-144 ( 6) ( 5.9 i 16.6)E 0 12 ( 9.3 i 24.2)E O (-1.6 1 4.5)E 1

( 0) (-3.0 - 3.5)E 1 (-1.5 - 3.4)E 1 (-6.1 - 2.9)E 1 e( 0/ 4)* *( 0/ 2)e f( 0/ 2)e I TH-232 ( 6)

( 0)

( 6.7 i 14.1)E 0

(-3.5 - 2.3)E 1 12 ( 2.0 i

( 1.8 -

.2)E 1 2.3)E 1

( 6.4 1 19.0)E 0

(-1.3 - 2.5)E 1 f( 0/ 4)e *( 0/ 2)e e( 0/ 2)e lI

  • NON-R0llTIE REFERS TO TE M#EER OF SEPARATE EASLEEEhTS l#(ICH ERE GREATER .

l l T)MN TEN (10) TIES TE AVERAGF BACKGROLND FOR TE PERIOD (T TE REPORT.

l TE FPACTION OF SATLE ANALYSES Y!ELDINC DETECTABLE EASLEEENTS (1.E. >3 STD DEVIATIONS) IS IM)ICATED WITH et )*.

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I M) Direct Radiation Direct gamma radiation exposure was determined from the use of thermoluminescent dosimeters (TLDs). Two CaF 2:Mn TLDs w re placed at each of the monitoring stations. The dosimeters at eighteen indicator stations and three control stations were collected and read out on a monthly schedule.

During August of 1984, the TLD reader was forced to be taken out of service for repairs. The manufacturer returned the repaired reader in October. Consequently, the field cycle for the TLDs placed in the field on July 27 was extended through October 15. The following field cycle was shortened (October 15 to November 6) to put the program back on the regular schedule. The TLDs from these two field cycles were read out at a higher voltage setting recommended by the manufacturer. Subsequent calibrations (with a Co-60 source), along with communication with the manufacturer led I to the conclusion that the TLD data from the above-mentioned field cycles were 28% high and that the high voltage setting should be changed. Consequent 1'y, that data was redued by 28 percent to estimate the true exposure for the period.

Three TLD badges were lost (apparently stolen while in the field) during 1984. These badges were from Station GM 1.13 (July) and GM 1.14 (March and August). Annual average exposure rates for the respective stations were assumed during the periods in question.

Summaries of the results for 1984 can be seen in the table below.

Annual average exposure rates are given for each station in Table 3.1.

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I Environmental Radiological Program Summary I Vermont Yankee Nuclear Power Station, Vernon, Vermont January - December 1984 Medium: Direct Radiation Units: Micro-R per I Measurements (TLD)

Site Hour Indicator Boundary Station With Control Stations H Stations Highest Mean Stations Mean Mean Mean Mean Range Range Range Range I

Station (No. Meas.)* (No. Meas.)M No. (No. Meas.)* (No. Meas.)M 9.8 12.0 24.3 9.2 5.4 - 14.6 6.0 - 39.0 1.14 19.6 - 39.0 6.5 - 15.8 (77) (118) (11) (33)

  • Most measurements based on readings from two TLD chips.

HDoes not include site boundary locations.

I In Table 3.2, the annual average exposure rate for each Zone 1 I station, and for all of them combined, were compared to the mean of-the three Zone 2 stations for that year (s). By comparing the 1984 ratios with those from other years, it is evident that the Zone 1 l

ambient radiation levels have not changed significantly over the last six years with respect to the Zone 2 levels. This approach was used to eliminate any influence from global or regional changes in ambient radiation levels or from changes in the performance of the TLD system. Zone 1 site boundary stations were not included in the comparison since they are on-site locations and are subject to I plant-related variations that could obscure seasonal or annual trends.

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I Table 3.1 Vermont Yankee Summary of Direct Radiation Measurements, 1984 I Station Description Zone Micro-R per Hour

  • Grbi.O Hinsdale, NH 1 9.7 GM--1.1 N. Hinsdale, NH 1 8.7 GM-1.2 Hinsdale Sub. I 10.2 GM-1.3 River Sta. No. 3.3 1 9.1 Grbi.4 Fairman Road 1 10.2 GM-1.5 Tyler Hill 1 10.5 Grbl.6 Site Boundary 1 10.0 GM-1.7 Site Boundary 1 9.6 GM-1.8 Site Boundary 1 10.7 GM-1.9 Site Boundary 1 11.2 GM-1.10' Site Boundary 1 10.4 GM-1.11 Site Boundary 1 9.9

( Grbl.12 Site Boundary 1 10.2 l

GM-1.13 Site Boundary 1 12.2 l GM-1.14 Site Boundary 1 24.3 GM-1.15 Site Boundary 1 12.8 l Grbi.16 Site Boundary 1 10.4 i

Grbl.17 Vernon School 1 9.9 I GM-2.1 Hogback Mt. 2 9.0 GM-2.2 Spofford Lake 2 9.7 GM-2.3 Northfield, MA 2 9.0

  • Annual average exposure rate.

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I Table 3.2 Vermont Yankee Ratio

  • of Zone 1** to Zone 2 Exposures I Description 1984 Ratio 1983 Ratio 1982 Ratio 1978-82 Ratio Station GM-1.0 Hinsdale, NH 1.05 1.04 1.05 1.04 GM-1.1 N. Hinsdale, NH 0.95 1.02 1.02 1.00 GM-1.2 Hinsdale Sub. 1.11 1.09 1.09 1.10 GM-1.3 River Sta. No. 3.3 0.98 1.00 1.03 1.05 GM-1.4 Fairman Road 1.10 1.03 1.09 1.08 GM-1.5 Tyler Hill 1.14 1.08 1.08 1.08 GM-1.17 Vernon School 1.04 1.06 1.08 1.10 All Zone IMM stations 1.05 1.05 1.06 1.06 I
  • Ratio of the annual average direct radiation exposure for a station to the mean of the Zone 2 (control) stations for that year.
    • Site boundary stations were not included.

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I N) Soil During September 1984, soil at 14 locations was analyzed for gamma emitting radionuclides in accordance with Vermont Yankee's Technical Specifications. In situ measurements involving both a high purity germanium (HPGe) detector and a high pressure ionization chamber (PIC) were performed at 13 of the sites. Core samples were taken at one of the sites for analysis at the Environmental Laboratory, as the close proximity of the plant turbine building made the in situ technique inappropriate. With the exception of this one location, the only man-made radionuclide detected in the soil analyzed was Cs-137, which is associated with fallout from atmospheric weapons testing and was detected at levels consistent with well documented environmental levels. The results of these analyses are summarized in Tables 3.3 and 3.4.

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1 I Table 3.3 Vermont Yankee Nuclear Power Station. Vernon, VT Summary of In Situ Soil Analyses September 1984 Exposure Rate (Micro-R Per Hour)

Location Cs-137 K-40 Th-232 U-238 Total

  • 01 Fairman Road .38 i .01 1.6 i .04 1.8 i .06 .95 1 04 8.0 i .08 I

02 VT No. 32 Well .14 4- .01 1.8 + .04 1.8 + .06 1.1 + .04 8.1 + .08 03 Rt. 9 Bridge .06 1 01 2.4 1 04 2.0 1 06 1.3 i .04 9.1 i .09 I 04 Vernon Nursing Well .14 i .01 2.0 i .03 2.6 1 07 1.4 i .04 9.4 1 09 I 05 Brattleboro Well .29 i .01 1.5 1 04 1.3 i .05 .88 i .03 7.2 i .07 06 N. Hinsdale, NH .22 i .01 1.4 i .03 1.9 i .06 1.4 i .04 8.2 i .08 07 Hinsdale, NH .16 i .01 2.1 i .04 1.9 i .06 1.2 i .04 8.6 1 09 08 Hinsdale Substation .29 1 01 1.9 i .04 2.4 i .07 1.4 i .04 9.3 1 09 09 RiveF tta. No. 3.3 .11 i .01 1.8 i .04 1.9 i .06 1.2 1 04 8.3 i .08 10 Hogback Mt. .28 1 01 1.2 i .03 1.4 i .05 .74 i .03 6.9 i .07

.I 11 Spofford Lake, NH .03 i .01 2.5 i .05 2.8 i .08 1.4 i .04 10.1 1 10 12 Northfield, MA .31 i .01 1.2 i .03 1.5 i .06 1.2 i .04 7.8 i .07 I 13 Tyler Hill .31 1 01 2.2 1 05 2.7 i .09 1.4 i .05 10.0 t .12 I 14 Plant Woll ** ** ** ** **

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  • Includes 3.3 uR/hr cosmic component.

Mk In Situ analysis not performed due to on-site location.

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Table 3.4 Vermont Yankee Nuclear Power Station, Vernon, VT Summary of In Situ Soil Analyses September 1984 I Concentration (pCi Per Kilogram)

I Location Cs-137 K-40 Th-232 U-238 01 Fairman Road 700 1 18 8700 i 200 630 1 23 530 i 21 02 VT No. 32 Well 260 _+ 11 10000 _+ 220 640 _+ 22 570 _+ 20 03 Rt. 9 Bridge 110 i 12 13000 i 250 710 1 23 730 1 23 04 Vernon Nursing Well 260 i 15 11000 1 240 940 1 27 760 1 24 05 Brattleboro Well 530 15 8400 200 470 1 18 460 17 06 N. Hinsdale, NH 410 1 17 8100 1 190 670 1 22 748 1 21 07 Hinsdale,ffH 310 i 16 12000 f 240 690 1 24 640 1 22 08 Hinsdale Substation 530 1 16 11000 1 220 840 i 25 790 1 23 09 River Sta. No. 3.3 210 1 14 10000 220 670 1 22 630 21 I 10 Hogback Mt. 520 1 15 6600 1 190 490 1 19 410 1 16 11 Spofford Lake, NH 53 1 8 14000 2 260 1000 i 28 790 1 24 12 Northfield, MA 570 1 16 6500 1 180 550 1 21 680 20 13 Tyler Hill 560 21 12000 310 980 i 33 800 f 30 I 14 Plant Well* 295 i 18 12000 i 380 560 1 58 ----

  • Based on 0-2 inch segment of soil core.

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4.0 QUALITY ASSURANCE PROGRAM Three separate Quality Assurance programs were performed during 1984 to demonstrate the validity of laboratory analyses by the Yankee Atomic Environmental Laboratory (YAEL).

I YAEL participates in the EPA Interlaboratory Comparison (cross-check) program for those species and matrices 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.

I YAEL 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, and I

analysis of blank and spiked samples. The records of the quality control program are reviewed by the responsible cognizant individual, and corrective measures are taken whenever applicable.

A blind duplicate / replicate program is maintained in which 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.

EPA Interlaboratory and Intralaboratorv Results l

l The Quality Assurance program implemented at the analytical laboratory l

indicated good precision and accuracy in reported values. Table 4.1 shows the results of accuracy and precision for laboratory analyses in 1984 for intralaboratory analyses, and EPA interlaboratory cross-check analyses. For accuracy, 55.2 and 84.4 percent of the results were within 5 and 10 percent of the known values, respectively, with 96.4 percent of all results falling within the laboratory criteria of 15 percent or two sigma. For precision, 1

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82.2 and 97.2 percent of the results were within 5 and 10 percent of the mean, respectively, with 100 percent of all results meeting the laboratory criteria of 15 percent or two sigma.

The results of the EPA Interlaboratory Comparison program, when considered apart from the remainder of the Quality Assurance program, were satisfactory with respect to accuracy and precision in 1984. One-hund red seventeen samples were analyzed (air particulate filters, food, milk, and water). A total of 294 analyses were performed (beta, Sr-89, Sr-90, I-131, Ba-140, K, Cs-137, Cr-51, Co-60, Zn-65, Ru-106, Cs-134, Ra-226, Ra-228, and H-3). ,

Of the 294 analyses, 3 (1.0 percent) did not meet the EPA acceptance criteria for accuracy. The first two of these were beta analyses of air filters. The use of an artificially prepared matrix by EPA, for which no reference nuclide has been quoted and no background air filters have been supplied, has caused the YAEL to question the EPA's results. The problem has been well documented in the past (Reference 2). The third of these was a Sr-90 analysis of a milk sample. After a re-milk, the results were acceptable. All of the analyses met the EPA acceptance criteria for precision. Details on all of the above cases may be found in References 3 and 4.

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Table 4.1 EPA Interlaboratory and Intralaboratory Results'- 1984 Accuracy

- Total Number 0 to 5% 0 to 10% 0 to 15%*

of Samples (or within 2 sigma) 868 479 733 837 (55.2%) (84.4%) (96.4%)

Precision I Total Number of Samples 0 to 5% 0 to 10% 0 to 15%*

(or within 2 sigma) 850 699 826 850 (82.2%) (97.2%) (100%)

I *This category also contains those samples having a verified zero concentration which were analyzed and found not to contain the isotope of interest.

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I Blind Duplicate-Replicate Program A total of 57 paired samples were submitted by the five participating plants for analysis during 1984. The data base used for the duplicate-replicate analysis consisted of paired measurements of 26 gamma emitting nuclides, H-3, Sr-89, Sr-90, low level I-131 and gross beta. A dual level criteria for agreement was established. If the paired measurements fall within 15 percent of their average value, then agreement between the measurements has been met. If the value falls outside of the i 15 percent, then a two standard deviation range (95 percent confidence level) for duplicates and a three standard deviation range (99 percent confidence level) for replicates is established for each of the analyses. If the ranges overlap, agreement is obtained. One thousand four hundred and fifty-nine paired duplicate and replicate measurements were analyzed for 1984. A total of 99.5 percent of all measurements fell within the established criteria discussed above. The seven measurements that did not meet the criteria were measurements of TeI-132 in river water, Fe-59 in milk, Cr-51 in ground water, Cr-51 in mussel bodies, Ce-141 in milk, Co-58 in seawater, and I-131 in seawater. Each was a single measurement in a 26-radionuclide gamma spectrometry analysis. The seven duplicate measurements represent 0.5 percent of all the blind duplicate-replicate measurements made during 1984. In all of the above cases, the radionuclide in question was not present at a detectable level in the sample, and a three-standard deviation acceptance criteria was s met. No trend was evident with respect to repeated failings of measurements for the above radionuclides.

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5.0 LAND USE CENSUS The Vermont Yankee Radiological Effluent Technical Specifications were implemented on April 1, 1985. prior to this date, there was no Technical Specification requirement for a land use census. Consequently, there are no I

census results to report for the calendar year 1984.

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6.0 SUPT 1ARY I During 1984, samples collected as a part of the radiological environmental monitoring program at Vermont Yankee showed detectable levels of man-made radionuclides in milk, mixed vegetation, cattle feed, river water, finfish, and sediment. In all cases, the low levels detected were shown to originate from fallout from atmospheric nuclear weapons tests. The radiological environmental monitoring program has therefore demonstrated that plant operations have had no measureable effect on the environment.

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7.0 REFERENCES

1. USNRC Radiological Assessment Branch Technical Position, Revision 1.

November 1979.

2. YAEL Quarterly Status Report, October-December 1983 Environmental Laboratory Group, Yankee Atomic Electric Company.
3. YAEL Quarterly Status Report, April-June 1984, Environmental Laboratory Group, Yankee Atomic Electric Company.
4. YAEL Quarterly Status Report, October-December 1984, Environmental Laboratory Group, Yankee Atomic Electric Company, i

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y, VERMONT YANKEE F-NUCLEAR POWER CORPORATION I

.. ,. s RD 5, Box 169, Ferry Road, Brattleboro, VT 05301 ,,,,y7,

'y ENGINEERING OFFICE 1671 WORCESTER ROAD

+ FRAMINGHAM, MASSACHUSETTS 01701

  • TELEPHONE 617-872-8100 April 30, 1985 FVY 85-39 United States Nuclear Regulatory Commission Region I 631 Park Avenue .

King of Prussia, PA 19406 Attention: Dr. Thomas E. Murley Regional Administrator

References:

(a) License No. DPR-28 (Docket No. 50-271)

Subject:

Vermont Yankee Annual Radiological Environmental Surveillance Report

Dear Sir:

-Enclosed please find three (3) copies of the Annual Radiological Environmental Surveillance Report for Vermont Yankee Nuclear Power Corporation, as required by our Technical Specification 6.7.C.3, Paragraph One. This report contains a sumary and analysis of the radiological environmental data collected for the calendar year 1984.

Should you have any questions regarding this submittal, please contact us.

Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION k

R. W. Capstick Licensing Engineer

j. RWCimep

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