ML20151Y576
| ML20151Y576 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 12/31/1986 |
| From: | Maine Yankee |
| To: | |
| Shared Package | |
| ML20151Y567 | List: |
| References | |
| NUDOCS 8805050038 | |
| Download: ML20151Y576 (90) | |
Text
- - .
MAINE YANKEE ATOMIC POWER COMPANY ANNUAL RADIOLOGICAL EINIRONMENTAL MONITORING REPORT January - December 1986 March 1987 Prepared By:
Yankee Atomic Electric Company Environmental Engineering Department 1671 Worcester Road Framingham, MA 01701 0451R
, _ _ w. s e -Q, 8005050038 070430 Up ADOCK 05000309 rb*
, w w w
TABLE OF CONTENTS Page LIST OF TABLES.................................................... iii LIST OF FIGURES................................................... iv
1.0 INTRODUCTION
...................................................... 1 2.0 ENVIRONMENTAL SURVEILLANCE PR0 GRAM................................ 2 3.0
SUMMARY
OF 1986 ENVIRONMENTAL DATA................................ 14 3.1 Air Particulate............................................. 16 3.2 Charcoal Filter............................................. 21 3.3 M11k........................................................ 24 3.4 Mixed Vegetation............................................ 31 3.5 Food Crop................................................... 34 3.6 Freshwater.................................................. 35 3.7 Precipitation............................................... 38 3.8 E s t ua r y k'a t e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 3.9 Marine A1gae................................................ 43 3.10 Sediment.................................................... 46 3.11 Finfish..................................................... 49 3.12 Mussels..................................................... 52 s 3.13 Crustaceans................................................. 55 3.14 Direct Radiation............................................ 58 4.0 ENVIRONMENTAL RADIOACTIVITY FROM THE CHERN0BYL ACCIDENT........... 61 5.0 QUALITY ASSURANCE PR0 GRAM......................................... 73 6.0 LAND USE CENSUS................................................... 77 7.0
SUMMARY
........................................................... 79
8.0 REFERENCES
........................................................ 80 f
l l
l l
l I
1 0451R
LIST OF TABLES Number Title Page, 2.1 Radiological Environmental Surveillance Program (prior to July 1, 1986)..................................... 3 2.2 Radiological Environmental Surveillance Program (following July 1, 1986)..................................... 4 2.3 Radiological Environmental Surveillance Locations........... 5 3.1 Summary of Direct Radiation Measurements - 1986............. o0 4.1 Chernobyl-Related Radioactivity in Erecipitation............ 63 4.2 I-131 In Precipitation, EPA ERAMS Network................... 64 5.1 EPA Interlabosatory and Intralaboratory Results............. 75 6.1 19 8 6 Land Us e Cen sus Re s ul t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 l
i s
9 l
i
-iii-0451R l
LIST OF FIGURES Title Page Number 2.1 Environmental Radiological Sampling Locations Within l 8 l One Kilometer of Maine Yankee...............................
l 2.2 Environmental Radiological Sampling Locations Within 9
12 Kilometers of Maine Yankee...............................
2.3 Environmental Radiological Gampling Locations Outside 12 Kilometers of Maine Yankee............................... 10 2.4 Direct Radiation Monitoring Locations Within 1 Kilometer 11 of Maine Yankee.............................................
2.5 Direct Radiation Mcnitoring Locations Within 12 Kilometers 12 of Maine Yankee.............................................
2.6 Direct Radiation Monitoring Locations Outside 12 Kilometers of Maine Yankee................. ........................... 13 Gross-Beta Measurements of Air Particulate Filters.......... 18 3.1 Iodine-131 on Charcoal 22 3.2 Filters..............................
Cesium-137 in M11k.......................................... 25
, 3.3 Cesium-134 in M11k.......................................... 26 3.4 Strontium-90 in 27 3.5 M11k........................................
Iodine-131 in 28 3.6 M11k..........................................
4.1 Gross-Beta Measurements of Air Particulate Filters - Mean of All Stations............................................. 65 4.2 Cs-134 on Air Particulate Filters - New England Controls.... 66 4.3 Cs-137 on Air Particulate Filters - New England Controls.... 67 4.4 Ru-103 on Air Particulate Filters - New England Controls.... 68 4.5 I-131 on Charcoal Filters - Mean of All Stations............ 69 4.6 Cs-134 in Milk - New England Controls....................... 70 71 4.7 Cs-137 in Milk - New England Controls.......................
4.8 I-131 in Milk - New England Controls........................ 72
)
-iv-0451R
1.0 INTRODUCTION
The Radiological Environmental Surveillanca Program at Maine 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 l
l the sttilon's environmental impact is known and within anticipated limits.
- To verify the adequacy and proper functioning of station effluent controls and monitoring systems.
- 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.
During 1986, as in the past, the Environmental Studies Laboratory (ESL) staff collected the bulk of the environmental samples and processed all environmental thermoluminescent dosimeters (TLDs) for direct radiation measurements. Af ter the initial processing, all non-TLD samples were sent to the Yankee Atomic Environmental Laboratory in Westborou. , Massachusetts for further processing and radionuclide analysis.
This report is a summary of the findings of the Radiological Environmental Surveillance Program for 1986. It is being provided in compliance with plant Technical Specification 5.9.1.5.
I 0451R .
2.0 ENVIRONMENTAL SURVEILLANCE PROGRAM In this section, Table 2.1 outlines the surveillance program as required by the plant Technical Specifications prior to July 1, 1986.
Table 2.2 outlines the program as specified in the Radiological Efflutat Technical Specifications implemented on July 1, 1986. Table 2.3 lists the sampling stations and their specific locations (distances are measured from the center of the Containment Building). The sampling locations are shown on maps in Figures 2.1 through 2.6.
Below are listed the two-letter media codes and what they represent:
AP Air Particulate CF Charcoal Filter TM Milk WF Freshwater (Groundwater)
WP Precipitation WE Estuary Water TG Mixed Vegetation TF Food Crop SE Sediment FH Finfish MU Mussels CA Crabs (Crustaceans)
HA Lobsters (Crustaceans)
AL Marine Algae TL Ilrect Radiation (TLD) l l
l 04$1R l
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L - - - - - - - - - ---- - ___
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T' bin 2.1 Maine Yankee Radiological Environmental Surveillance Program (Prior to July 1, 1986)
Media Sampling Frequency Required Analyses Air Particulate (AP) - Weekly Gross-beta
- Quarterly Composite Gamma spectroscopy Charcoal Filter (CF) - Weekly Gamma spectroscopy Milk (TM) - Monthly Ganna spectroscopy.
I-131, Sr-89/90
- Monthly Composite
- Gamma spectroscopy, Sr-89/90**
- Weekly
- I-131 Mixed Vegetation (TG) - Twice During Gamma spectroscopy, Growing Season Sr-89/90**
Fcod Crop (TF) - Annually (Harvest) Gamma spectroscopy, Sr-89/90**, I-131 on green leafy portions of vegetables Freshwater (WF) - Quarterly H-3, gamma spectroscopy
- Once Per 3 Years Ra-226 Precipi ation (WP) - Monthly Composite H-3 Estuary Water (WE) - Monthly Composite Gamma spaatroscopy
- Quarterly Composite H-3 Marine Algae (AL) - Quarterly Gamma spectroscopy, Sr-89/90**
Sediment (SE) - Semiannually Gamma spectroscopy.
Sr-89/90**
Marine Biological - Quarterly Gamma spectroscopy.
Media (FH. MU, CA, HA) Sr-89/90**
i Direct Radiation (TL) - Monthly *** Integrated gamma dose
- Performed whenever plant I-131 releases exceed quarterly limit (Technical Specification 3.17).
(* Performed whenever plant-related Cs-137 concentration is 10X non-plant-related Cs-137 concentration.
- The sixteen outer ring stations were collected and read out quarterly.
0451R
Table 2.2 l
Maine Yankee Radiological Environmental Surveillance Program (Following July 1, 1986)
Media Sampling Frequency Required Analyses Air Particulate (AP) - Weekly Gross-beta
- Quarterly Composite Gamma spectroscopy Charcoal Filter (CF) - Weekly I-131 Milk (TM) - Monthly Gamma spectroscopy, I-131 Food Crop (TF)* - Annually (Harvest) Gamma spectroscopy, I-131 Groundwater (WF)** -
Quarterly H-3, gamma spectroscopy Estuary Water (WE) - Monthly Composite Gamma spectroscopy
- Quarterly Composite H-3 Sediment (SE) - Semiannually Gamma spectroscopy Fish and Invertebrates - Semiannually or in Gamma spectroscopy (FH, MU, CA, HA) Season Direct Radiation (TL) - Quarterly Integrated gamma dose l
1
- Performed only if milk sampling is not done.
- Groundwater samples shall be taken when this source is tapped for drinking or irrigation purposes in areas where hydraulic gradient or recharge properties are suitable for contamination.
0451R
Table 2.3 (continued)
Maine Yankee Radiological Environmental Surveillance Locations Distance Station Code Zone ** or From Plant Direction (Media - Sta. No.) Station Description TLD Ring *** (km) From Plant
- TL-27 Barters Island 0 7.0 SSE
- TL-28 Westport Island, Rt. 144, 0 7.7 S and East Shore Rd.
!
- TL-29 Harrison's Trailer 0 6.3 SSW
!
- TL-30 Leeman Farm, Woolwich 0 7.6 SW
- TL-31 Barley Neck Rd., Woolwich 0 6.7 WSW l
- TL-32 Baker Farm. Woolwich 0 7.2 W l
- TL-33 Rt. 127, Woolwich 0 7.3 WNW
- TL-34 Rt. 127, Woolwich 0 7.9 NW l
- TL-35 Rt. 127, Dresden 0 9.1 NNW
- TL-36 Boothbay Harbor Fire C 11.4 SSE Station
- TL-37 Bath Fire Station C 10.4 WSW
- TL-38 Dresden Substation C 19.8 N TL-39 Restricted Site Boundary I 2.2 NNE (Formerly TL-(8))
l l ~~E' Listed in Off-Site Dose Calculation Manual. Table 4.1.
- Zone 1 = Indicator Stations; Zone 2 = Control Stations.
- O* I = Inner Ring; O = Outer Ring; C = Control Station.
0451R I
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3.0
SUMMARY
OF 1986 ENVIRONMENTAL DATA The following pages summarize the analytical results of all the environmental samples which were collected during 1986. 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 year's data for each category. The tables 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 raatonuclide, 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 plant Radiological Effluent Technical Specificaticas. (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.
Those sampling stations which are adjacent to the plant and which could cor. ily be affected by the operation of Maine Yankee are called "ind 4 tor" or "Zone I" stations. Distant stations, which are beyond plant influence are called "Control" or "Zone II" 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:
o The mean value of all concentrations including negative values and values below LLD.
o The standard error of the mean.
0451R
l o The lowest and highest concentration.
l o The number of positive measurements (activity which is three times greater than the standard deviation) divided 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 etandard deviation uncertainty. The quoted uncertainty term represents only tbe 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.
0451R L--- - -- _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___ __ ______________ ____ __ _ __
l 3.1 Air Particulate Air monitoring stations are established at a total of nine locations. Seven of these locations are indicators, while the remaining two are control stations. The air pAmps at these l locations operate continuously at a flow rate of approximately one cubic foot per minute. Airborne particulates are collected by passing the air through a fiber 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) show random fluctuations through much of the year at all sampling locations including controls, thereby indicating that any plant contribution is negligible. The increase in gross-beta measurements, as well as the measurement of Cs-134. Cs-137. Ru-103, and Ru-106 during May and June of 1986 can be attributed to fallout from the Chernobyl accident and is discussed in Section 4 Naturally occurring K-40 and Be-7 were also detected in many samples.
The following air particulate and charcoal filter sampling intervals were missed in 1986:
a) All filters for the week October 3 to October 10 were lost apparently in the mail; b) The pump at AP/CF-11 seized after two hours operation during the week of February 7 to February 14; c) The sample holder fell off of the pump at AP/CF-28 during the week of May 23 to May 30; 0451R
d) The sample holder fell off of the pump at AP/CF-11 during the week of June 13 to June 20; I
e) A power outage of approximately one to three hours occurred at all stations except AP/CF-15, 28, and 29 during the week of March 15 to March 21; f) A one-hour power outage occurred at AP/CF-13 on June 17; g) A 1-1/2-hour power outage occurred at AP/CF-14 during the week of October 3 to October 10; and h) A one-hour power outage occurred at AP/CF-13 on December 3.
6 0451R
3 FIGURE 3.1 GROSS BETR MERSUREt1ENTS ON RIR PARTICULRTE FILTERS MRINE YANKEE l 0.6 J D - BP-11 MONTSWE8G BROOK o - BP-12 EBTON fftRM A - f1P-13 BAILEY FARM 05^ + - PP-14 Nf1 SON STEfin ST6 TION p X - f1P-15 EDGECOMB FIREHCUSE o - PP-16 WESTPORT FIPIHOUSE I I v - P.P-17 HRRRISONS TRflILER
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l l R.1-10.1 ( %) f 2.4: .S:E -3 15 ( 4.6 1 2.5)E -3 ( 6.1 t 26.0)E -4 l ( 7) (-4.1 -
9.7)E-3 (-2.0 - 77.6)E-4 (-1.2 - 1.01E -2 e( 7/.5), et 1/ 3)e et 2/ 7)*
RJ-106 ' %) ( 2. 2 1. 4 E -3 15 ( !.21 1.0)E -2 ( 2.5 t 1.01E -?
( 0) (-1.1 -
2.1)E -2 ( l.2 - 31.2)E -3 (-2.8 - 70.8)E -4 er 3/ *.le +( 0/ 3)e et 0/ 7)e CS-134 ( ?21 .05 ( 2.11 .9:E -3 17 ( 2.9 t 3.3)E -3 ( 2.0 t 1.91E -3
( 0) (-4.1 -
9.(1E -3 (-8.1 - 95.7)E -4 (-3.0 - 9.8)E -1 e( 7/ ;*), et 1/ 31e et 2/ 7)e CS-!?7 ( K ) . 0f. ( 4.51 1.OE -3 12 ( 5.9 t 5.llE -3 ( 5.1 2 3.2)E -3
( 0) (-4.7 - 17.4'E -? ( 2.1 - le M.0iE ' (-t.7 - 17P.01E -5 of 7/ ;% er 1/ 3:e of :/ Tie fa-140 ( Ki ( t.3 10.':E -2 17 ( t.3 t 4.3,E -1 ( 1.8 t 1.81E -i f c. #-1, .
1.9:EO (-3 ( -1%Y.0tE -4 ( 2.3 - 147)E '
e' O i ;* i e *( 0/ sie ei 0; 7).
(1-141 ( r1 ( 2. 6 0.3)E -? 12 ( 1.9 t 1.8)E -2 ( 2.7 1 3.0'E '
( O' (-1.9 - '?.5)E -; (-2, r. - 5'? . 0 ) E -a (-;: - .1)E ~
et 0/ 25)* et 0/ 3)e *( O! 7)e (I-144 ( ?2' ( -1.lt 7.4)E -4 12 t 4.1 t 3.4)E -3 (-t.6 t 4.3)E -4
( 01 (-1.4 - 1.1)E - (?!- 100.0;E -4 (-2.e - . ';E -7 e( ( / ." ) , et O! 3)e *( 0/ 7 ),
TH-272 ( 321 ( -1.12 9)E -3 17 ( 5.2 t 10.6)E -4 (-3.3 t 4.0)E -4
( 0) (-!.7 - .3)E-2 (-9.2 - 25.8)E -4 (-2.6 - 4)E -3
- ( O! 05)e et 0/ 3)* *( 0/ 7),
e TN-Rolli!T PUERS TO M NMER OF StFARATE TASWETNTS WICH WEFi 7 EATER TWW TEN (10) TITS M AVEFK( BACY@0.ND FCR M FERIOD OF TT REKRT.
et M FRACTICN 7 !#ftE 4MLYSES Y!ELO!0 (CTECTABLE TANNTS
(!.E. >3 STL CEVIATIONS) IS ICl(ATED WITH s( le.
-20
3.2 Charcoal Tilters Charcoal filter cartridges are situated in series with the air particulate fiber filters. Monitoring stations are located at a total of nine stations. seven of which are indicators and two of which are controls. The air pumps at these locations operate continuously at a flow rate of approximately one cubic foot per minute.
Charcoal filters from the nine air sampling stations were collected and analyzed weekly for I-131 activity. During much of May and June of 1986, I-131 was detected in charcoal filter samples from all locations including controls, as can be seen in Figure 3.2. This radioactivity originated from the Chernobyl accident and is discussed in Section 4.
Several sample intervals were missed during 1986 and are discussed in Section 3.1, Air Particulate.
0451R
FIGURE 3.2 10DIf1E-131 OtJ CHARCORL FILTERS tif1INE YflNKEE 0.s 0 - flP-11 MONTSWEflG BROOK o - f1P-12 ERTON FRRr1 l o,7 _ A - flP-13 BRILEY FRRM (
I
+ - RP-14 MRSON STERM STflTION !
X - f1P-15 EOGECOMB FIREHOUSE o - PP-16 HESTPORT FIREHOUSE
"'~ y v - RP-17 HflRRIS0*ls TRflILER i 52 - f1P-28 BflTH SUBSTflTION l X - flP-29 ORESOEN SUBSTflTION l $ {l y 0.s - ll h N N
l 0. 9 -
b E
8 0.3 -
g E
0.2 -
0.1 -
I
_ _ _ _ _ m . m _ _ . _____m____
. _ _ _ _ _ _ _ _ _ _e_ _ _ _ _ J 1 ___
ME OCT NOV DEC JfW FEB ffR fFR FPY AN JUL SEP 1986
EWIV.tfEtM RO!CLC01CA'. FfGAM 9. RWA MIVE Yt# EE A'Cr'!C F9fER STATICN. WIKA!!it. ME J#.# t - CCCEER 19%
TM m NJW.FILitR (NITSt ft!/Ct. 4
!<!CATOC STATICNS STAT!CN WITH H!CE ST T AN CSTh% STATICf !
' 416449496969999666 tittelititlettiliittillet 64449446tittlete FADICetXt!CCS EM T44 Eth STA. RWE F#G (O. #RY!Ef) FIG 8.I!FID R46E NC. CETECTEDel W. CCTECTEDet (0-R)rT!PEl' LLD NC. CETECTEtet NO.
1 131 (361) .07 ( !.72 .5)E -2 12 ( 2.7 t 2.01E-2 ( !.6 t 1.01E 2
( 7) (-1.5 - 54.71E -2 (-1.5 - 54.7)E -2 (-1.1 - 5?.0)E -2
(( 30/254)# 4( 5/ 2719 et 9/ 7719 9 N'.N-VUTINE FE5B': TO THE 973ER CF SUt/ ATE TGRE"iKT5 Wh!CH WEFT CA!MES T4 TEtt (10) TITi. THE 4tW.( MMP3.tO FCF THE FTRIOD CF THE FIFW.T.
te THE FFET!Cr; CF %'F.E #RY5!$ )]ELDIR:. CCTECTRE TGFfTNTS
.!.E. : <TI f(Is!!?i?' 15 It;NT ATED WITd et it.
l
(
1 l l
3.3 Milk Milk samples were collected and analyzed monthly for Sr-89, Sr-9D.
low level I-131 and gamma-emitting radionuclides. Following July 1,1986, Sr-89 and Sr-90 analyses were no longer required, but were done anyway. Additional sampling was performed to assess the impact of fallout from the Chernsbyl accident.
As in previous years, detectable concentrations of Cs-137 and Sr-90 were measured in milk samples submitted f rom the indicator and control locations. (See Figures 3.3 and 3.5.) These levels were similar to those in past years and, as discussed in previous reports, may be attributed to fallout from nuclear weapons tests conducted pr'marily by the Peoples' Republic of China (the last test was in 1980). The Leeman Farm (TM-17) and the Hanson Farm (TM-25) were added to the program in July of 1986 as part of the new Radiological Effluent Technical Specifications. The relatively high levels of Cs-137 and St-90 at the Leeman Farm were noted in 1980 and 1981 during a special study, and are also attributed to fallout from nuclear weapons tests. It has also been shown in previous reports that farming practices (amount of vegetation and type of vegetation that the cows are allowed to feed on) were the cause for the large variations of Cs-137 and Sr-90 concentrations in milk from farm to farm.
l The Cs-137 levels in the summer of 1986 were elevated somewhat due to the additional fallout from the Chernobyl accident, which is discussed in Section 4. Also detected in milk during this period, and also attributable to Chernobyl, were Sr-89, I-131, and Cs-134. (See Figures 3.4 and 3.6.)
l 1
0451R I
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fF O f S F NTN f RiiO E. Nf Q S .w Kr IN 1 i r Nf f
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6745 _a 1122 MMMM B TTTT I
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t m s r Ee O s mdx882 lll llllfI ll l lill
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S MIR ,
MRRI RADH AF D R F S F WTN RfHO f
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IiGS F DIW fENf BLKH m i
r 6745 1122 ,
MMMM 5 TTTT U F
0Oa+ ,
W J
. - ~
l s 0 ' 0 e M m s 3 i 1 kgS2N ds8ga.
.~'
FIGURE 3.6 10 DINE-131 IN MILK MAINE YANKEE m
2eo-m- D - TM-16 BfiKER FORM O - TM-17 lfDifVi Ff1RM 2e- A - 7ti-24 KNIGHTS Of11RY
+ - TM-25 Hf1NSON Df11RY 220-g 200-a o 180 -
Ilio - 1 s t 8 110 -
E
@ 120 -
8 I z a-t m.
60-10 -
20-o:: : :
riflR
=
frR
= fiflYd 's- JUL JUN
=
f0G
=
,=
OCT
=
=
DEC JAN FEB 1986
ENVIROWENTtt RADICLOGICAL F5tCAAM StrtMY MAIE YAWEE ATOMIL FtnES STATIC 0 W!!G! SET, N JAY.4RY - DECEMBER 1986 lJ:1T5: K */FS MEDitM: MILK-ICICATOR STATims STATION WITH HIC 4EST KEAN CftiTMt 51*TI(rn eeeee+eeeeeeeee+ee *++eee+eeee+eeeeeeeeeeeen esteneeeetetetee i
!' RADION.itt![ES EAN EM EM STA. R#CE RAK{
(W. ANALYSES) REQUIRED RAKE
. (NCN-ROUTINE)' LLD NO. IETECTED+e - W. M.IETECTEDee NO. DETECTED +e 5 -39 ( 32) ( 2.21 1.7)E -1 16 ( 3.3 t 2.1)E -1 ( 6.2 t 17.4)E 2
.( 1) (-7.5 - 25.2)E-1 (-5.3 - 25.2)E -1 (-7.3 - 15.7)E -1
- ( 1/ 19)* *( 1/ 13), e( 1/ 13),
%-90 ( 32) ( !.3t .1)E 1 17 ( 1.4 t .2)E 1 ( 5.2 t .6)E O
( 0) ( 9.1 -
22.5)E O ( 9.5 - 22.5)E O ( 2.1 - 8.91E O et 19/ 19). +( 6/ 6), *( 13/ 13)+
1.4t 2.5)E O ( 4.7 t 5.3)E O i 2.5 3.2)E 6 IE ( 32) ( 17
( 0) (-1.9 - 2.61E 1 (-1.2 - 2.6)E 1 (-1.8 - 2.4)E !
- ( 0/ 19)+ *( 0/ 6)* - ei 0/ 13)*
K-40 ( 32) ( 1.2t .01E 3 2*. I 1.4 i .0)E 3 ( 1.3 t .0tE 3
( 0) I 8.1 -
14.3)E ^ ( 1.3 - 1.5)E 3 ( 1.3 - 1.5:E '
H !c/lt+ et 6! t,) + C 13t 13:+
s
( 4.5 t 7.0)E -1 ( 1.9 t 2.51E -;
m-54 ( 321 ( !.9r 2.8:E -1 !?
f -1. 6 - 2.6?E O ;-1.8 - 2.6'E O (-1.7 - * . 7:E ^
f 0:
- ( O! 6), e' 0/ 13)e e! O! 19)e 00 '.3 ( 32) ( -5.5t 30.31E -2 :". ( !.! t .3)E O ( 4.6 t 2.51E -1
( - 0) (-1.9 - 1.5)E O ( 1.6 - 17e.01E -2 (-? . 3 - 17. ole 1 .
et 0/ 19), *( 0/ 6), *( Ol13)e FE-59 ( 3D ( 1.2t .7)E O 17 ( 3.5 t 1.3)E 0 (-2.* 10.0)E -1
( 0) (-3. 2 - 7.6)E O (-4.? - 75.9)E -1 (-5.^ - 5.7:E <
+( 0/ 19)+ *( 0/ Oe a: 0/ 13)*
EO-60 ( 32) ( 1.3t 34.5)E-2 17 ( 4.2 i 7.9)E -1 (-2.4 t 3.21E -1
( 0) (-2.7 - 3.5)E O (-2.1 - 3.5)E O (-3.6 - 1.3)E O
- ( 0/ 61, et 0/ 13),
- ( 0/ 19)e ZN-65 ( 32) ( -2.St 4.8tE -1 17 ( 6.7 t 8.9)E -1 (-7.9 t 8.5)E -1
( 0) (-3.8 - 3.4)E O (-2.4 - 3.4)E O (-7.3 - 4.!!E O
- ( 0/ 19), *( 0/ 6)* *( 0/ 13 9
+ KN-R0lfi!NE RErERS TO THE N.t9ER OF SEWATE EASLREMENTS Wim ERE GREATE:-
THAN TEN (10) TIES THE AVERAGE BATC#Ct.tc FCR THE PERIOD CF TIE REKRT.
ee T)E FRACTICN CF SAMFtE ANALYTES Y!ELDIO DETECTAftE EA9.RETNTS (f.E. >3 STD CEVIATICt6) IS !NDICATED WITH *f )t.
A EWICCe@;'A1. 4 DICT 00!CC PR00FM RmAFV N ! < YV.rEE AT0ric POWEP s uT10t;. W!$f.AS5E1. E JAVJ4Y .- IEGMifR 1986
- MEDit.: Mltr tr;tte: P;J /K6
- ICfCt. TOC STATICNS - STATION WITH HIGHEST E #! CCeliROL STA?!WF
- nunun**nen en u nen e nen en ** n n unenennun RADION'n!IES- MEAN EM MEC (N), ant 4Y!ESi RE0'JIRED Rt.%E STA. RANGE FME (NON-ROUTINE 1' LLD N?. DETECTEDn NO. NO. DETECTEDn NO. DETECTED **
7R-95 ~ ( 32) 1 -!.71 4.0!E -1 24 ( 4.5 i 5.4)E -1 ( !.7 i 3.91E -1
(. 01 (-4.0 - 3.0?E O (-1.7 - 2.1)E 0 (-l.8 - '2.61E O of 0/ 19l* *( 0/ 7)* *( 0/ 13)*
RU-103 ( 321 ( -0.42 ??.2 E -2 17 ( 2.5 7.31E -i (-1.1 * .31E '
( 0) '-2.1 - 2.3)E - 0 (-2.1 - 1.91E 0 (-2.0- ' .65E O tr 07 im *( 0/ 6)+ *( 0/ 131*
a R'J-106 ( 32) ( 3.62 1.HE O 17 ( 7.0 t 3.6tE o ( 7.6 t 26.01E -1
( 0) (-5.? - !?.2iE 0 (-6.9 - 17.2)E O (-1. 9 - 1.5:E !
- ' 0114* of 0/ 61+ H O' 1316 1-1?! ! 32. 1.0 f 1.4! 1.31E 1 t e. ( 2.0 t 1.0)E 1 f 5.0 : 5. 1 '.
( ?! t-5.'. -24yc 0:E -2 ( .S*. - 24Xx))E -2 '-1.2 - 66.M E -1 v :: !W ,e 31 13n e tr CS-134 1 ??) 15. ( 3 !f 1.2?E O 16 i 4.0 1 1.91E 0 ( 2. ) t .?)E *
( 11 I-2." - Oi.3:E 0 (-2.7 - 23.flE 0 t-6.* - 6'.3:E -1
- 6. !! IN *t 7/ 13)e ei '. 13 a CS-!?.? ( ?21 13. ( 2.7t 4E 1 17 ( 4. 2 i .81E 1 ( !.0 t .21E
! 0) ' 7.0 - 61.0'E O ( !.! - 6.21E 1 ( 2. 0 - 2t 1'E O
- ( 19/ 19)* *( 6/ 615 +( 12/ 13)*
( -9.0: 3.5;E -1 25 ( 8.3 t 69.6)E -2 (-8.6t 5.0;E -1 IA-lL0 ( 321 15. '
( 0: f-4.6 - 5.1 E O (-3.1 - 1.4?E O .-4.1 - 1.L'E
- 0! 10)* *( 0/ 6)* oi13)*
M-141 ( 32) ( 6.7t 5.1)E -! 16 ( 1.4 i 4)E O ( 3.2 t 5.9)E -1
( 0) (-6.0 - 3.3lE O (-2.0 - 3.3)E O (-3.8 - 3.3)E O
- t 0/ 191* *( 0/ 13)i *( 0/13)*
CE-144 ( 32) ( -2,2 1.91E O 17 ( 2.0 i 4.3)E O (-1.2 t 1.5)E O
( 0) (-1.7 - 1.8)E 1 (-9.0 - 18.4)E O (-9.5 - 8.8)E O
- ( 0/ 19)* *( 0/ 6)* *( 0/ 13)*
e
- N?N49)i!E REFEF$ TO THE M.MBER Cf SEPARATE MEARFTEN'TS WHICH WERE OFIATE9 THM TEN (10) TIES TE AVERAGE Ed.Cx(A0UND F0F THE PERIOD OF THE REPOPT.
te TE FRACTION CF SAMPLE MALYSES Y!ELDIC IETECTAKE MEASLF.MENTS (I.E. >3 STD IEYl ATICPG) !! INDICA?ED '.JITH H le.
l l
3.4 Mixed Vegetation Mixed vegetation samples were collected in June from four sampling locations and in September from TG-11. The vegetation consisted of various types of grasses and were analyzed for gamma emitting radionuclides. Naturally occurring Be-7 and K-40 were detected in most samples.
As a result of the fallout from the Chernobyl accident Cs-134 Os-137, and Ru-103 were detected in the June samples. (See Section 4 for a discussion of the Chernobyl accident.)
0451R
ENVIRONMENTS. FAD 10LOGICA. PR%Rkt 9.MWi MAlhE Y/#EE ATCelC KWER STATION. WISCGE1. ME JANUARY - DE Mt m 198!
WITS: PCIdG 47 EDilP.: MIIED VECETATION STATION WITH H104EST MEAN CCWiROL STAT!0f.1 INDICATOR STATIONS 4tiftttt+ffittttttiffitti eftilettitfitfit tiettefffttttttitt EAN EAN TAN RADICNILIES STA. RANGE RA G (NO. ANALYSES) RE0VIFfD RANGE NO. NO. DETECTED ** NO. DETECTED +s (NON-RnUTIE)' LLD NO. DETECTED +5
( 1.51 .7)E 3 11 ( 1.8 t 1.1)E 3 ( 4.2 1 2.5)E 2 IE-7 ( 5)
( 0) ( 6.9 - 28.8)E 2 ( 6.9 - 28.8)E 2 ( !.7 - 6.7)E 2
- ( 3/ 3)* *( 2/ 2)e *( 1/ 2)*
( 5.31 .9)E 3 11 ( 5.9 1 1.3)E 3 ( 4.4 * .3)E 3 K-40 ( 5)
( 4.2 - 7.2)E 3 ( 4.6 - 7.2)E 3 ( 4.1 - 4.7)E 3
( 0)
- ( 3/ 3)* *( 2/ 2)* it 2/ 2)*
4.2t 8.2)E 0. ( 6.5 t 13.6)E O (-9.0 t 53.71E -1 PN-54 f 5) ( 11
( 0) (-7.0 - 20.1)E O (-7.0 - 20.1)E O (-4.3 - 4.53E O et O! 3)* f( 0/ 2)* *( O! 21<
6.61 3.8)E O 23 (t0i 1.1)E 1 ( 8.6 i 11.0)E O CO-58 ( 5) (
( 0) ( 2.3 - 14.1)E O (-2.4 - 15.5}E O 9( O! 3)* *( 0/ 1)* *( O' 2R
( -3.51 6.2)E O 24 ( 2.6 f 2.3)E 1 ( 3.0 f 253.0)F -1 FE-59 ( 5) (-2.5 - 2.61E !
f 0) '-1.3 -
.8)E 1
- ( 0/ 3)! ef O/ 11e *( 0/ 2)*
( -7.7i 4.01E O 24 (-2.1 i 10,5)E O (-6.7 t 4.61E O CO-60 ( 5) .21E !
(-1.3 - .0)E 1 (-1.1 -
( 0)
- t 0/ 3)* *( 0/ 1)* *( 0/ 2)e
!.11 2.5)E ) 23 ( 6.1 i 2.7)E 1 t 3. A t 2.3)E 1 IN-65 ( 5) (
( 1.5 - 4.1)! '
( 01 (-2.1 - 6.01E 1 et 0/ 3)* e( O! 1)* ff 0/ 21*
( -2.7i 13.6)E O 24 ( 2.3 t 1.7)E 1 (-4.6 i 27.2)E 0 ZR-95 ( 5) (-3.2 - 2.3)E I
( 0) (-3.0 - 1.3)E 1 et 0/ 3)* *( 0/ 1)* *( 0/ 2)*
1.3)E 1 23 ( 1.0 t .2)E 2 ( 8.e 1.41E 1 FU-103 ( 5) ( 5.31
( 2.8 - 7.3)E 1 ( 7.3 - 10.2)E I
( 0)
- ( 2/ 3)* *( 1/ 1)e *( 2/ 2)*
9 NCN-ROUTINE REFERS TO THE PUGER CF EPARATE EA9.REENTS Wh!CH WERE &CTER THM TEN (10) TIES TE AVERAGE BACK0RCUO FOR THE PERIOD CF THE REPORT.
- TE FRACTICH OF SATLE ANALYES YIELDING ETECTARE EA9.REENTS lt.
(1.E. >3 STD WVIATI0rG) IS IN0!CATED WITH *(
l ENVlftMENVAL PADICWl(#. PMMR 9.r/ARY MAINE YAWEE ATOMIC KWER STATICri. WISCAMET. M
-JA4)ARY - KCEMBER 1986 EDII.P MIIED VECETATICH (r'I*S: PCl/G W!t ICICATOR STATIONS STATION WITH HICNEST E AN CtNTFti. STATICtr-it4ttttttiffflitti efittitttfietttitititetti filetttttilf+tti RADICNXLIIES EAN EAN EM (ND. ANALYSES) REGtJIRED RAN'E STA. RAK{ RA%E (WN-ROUTIEl' LLD NO. DETECTE0** NO. NO. ETECTED*t W. IETECTED**
RU-106 ( 5) ( 1.4i .9)E 2 11 ( 2.0 i 1.1)E 2 ( 1.1 i .6)E 2
( 0) ( 1.4 - 31.1)E I ( 9.0 - 31.1)E 1 ( 4.5 - 17.1)E 1
- ( 0/ 3)* *( 0/ 21e *( 0/ 2)e 1-131 ( 5) ( -2,3t 3.3)E 1 12 ( 4.0 f 10.0)E 1 ( 6.1 t 22.:)E 0
( 0) (-6.8 - 4.01E 1 '-!.6 - 2.?)E 1
- ( 0/ 3)* ff 0/ 1)+ *( 0/ 2)*
CS-134 ( 5) ( 6. St 19.4)E 0 12 ( 4.0 t 9)E 1 ( 2.1 t .9)E
( 1) (-2.E - 4.0)E ! ( 1. 2 - 3.0 E 1
- ( 1/ 3)+ n 1/ 19 +f O! 2)t 05-137 ( Si ( 6.4f 2.9)E 1 12 ( !.2 .1)E 2 ( 5.5 2.0)E :
( 0) ( 1.9 - 11.7)E I ( 3.5 - 7.6)E I
- ( 2/ 3)* e 1/ 1)* *( 2r 2)e Ec-140 ( 5) ( -3.0t 2.5)E 1 23 ( 2.2 t 4.0)E 1 ( 1.9 .3if
( 0) .(-6.5 - 1.C?E I ( 1.6 - 2.2)E 1
+: Oi 3)* +( Oi !)+ *: O' 2i+
( !.3 t ?.0'E '
CE-14: ( 5; I -2.2+ .5)E 1 24 1.51E 1 (-1.7 +
( 0) f-3.0 - -:.2iE (-4.' - 1.31E 1
+( 0/ Sie et 0/ 116 +( O! :)*
( 6.5 13.51E O 12 ( 3. 3 t 4.2)E 1 '-3.~ ! 5.61E !
CE-148 ( 5?
( 01 (-1.0 - 3.3)E I ( #. : -
1 *:E :
- f 0/ 3)* *( O! 1)+ H 0/ 29 TH-232 ( 51 ( 3. 0t .7)E 1 24 ( 4.4 t 3.1)E I (-3.7
- 47.7)E 0
( 0) ( !.S - 4.2)E 1 (-5.1 - 4.4)E !
- ( 0/ 3)e +( 0/ 11+ *( 0/ 2)*
e G-ROUTIE REFERS TO M MBER CF SEPARATE EA9)REENTS WHICH WERE Cf4ATER TIMN TEN (10) TIES M AWRAGE BACKCKt.ND FCR M FERIOD CF THE REPORT.
3.5 Food Crop Since food crop samples are scheduled for collection at harvest time, no samples were collected prior to the implementation of the Radiological Effluent Technical Specifications on July 1, 1986.
Following July 1, food crop sampling was not required provided that milk sampling was being performed (which it was).
Consequently, no food crop samples were collected in 1986.
t l
l 0451R
(
v- -, -e <c.,-,s ,--s,-,n----,-.-n.,-,------._, , ,, ,- n- ac, ,, , ,,,,,-.,n-, - .-, ,, - rn . . - - , - -, - .-- . -
g-- -
3.6 Freshwater Fresh (ground) water grab samples were collected from three l l
indicator and one control station on a quarterly basis prior to '
the Radiological Effluent Technical Specification implementation i on July 1, 1986. These samples were analyzed for H-3 and gamma emitting radionuclides. Although not required, samples were collected from WG-13 and WG-24 on a quarterly basis following July 1. These samples were given a low level I-131 analysis in addition to the above analyses. The results show that there were no radionuclides detected in fresh (ground) water samples during 1986.
f 6
i i
l 0451R
Et//1RCr@m2. PM!f.t0:1C/4 PFJW Srt2
'- MAINE Yt#EE ATCrilC FO9 STATI(ta. WISC/4SEi, ME JM.lA0Y - MCMER 1986 ED:le.: FMSH WATEP tN!TS:. PC!!C
- I%ICAirf STAT)Cf.'S STATICN WITH HIGTST EAN CONTROL STAT 1 W RADICNXI. IDES EAN EM TM STA. RA0E FJEE (NO..WLYSES). RE(.t! FED- R E GE. .
Hn. DETECTED +,
(NON-ROUT!NEI' Lt.D NO. E TECTEDt. to. W. ETECTECH
-. _z ........
BE-7 ( 12) ( -3.4f 2.3)E O 11 ( 3.1 t .4)E -! (-1.9 t 3.0)E O
( 0) (-1.4 -
.3)E 1 ( 2.7 - 3.4)E -1 (-5.6 - 7.2)E O
.( 0/ 81 +( 0/ 21. .( O' 4)+
l K-40 ( 12) ( 4.7f 3.5)E O 13 ( 8.0 t 2.4)E O (-9.2 61.6)E -1
( C .' (-1.5 - 1.8)E 1 ( 2.0 - 13.9)E 0 (-1.6 - .9)E 1
.' 0/ 81 .! O! 4). .( 0/ 41.
1.4: 37.e!E -2 !! ( 1.1 t .8)E O ( 3.3 1 10. T E '
I m-52 ( 12) 15. I
( 0) ( - 1. '. - 1.9;E O ( 3.0 - 16.9)E -1 (-3.6 - 3.6tE -1 l .t O! f). .( 0/ 21 .i 0/ 4H CD-SS ( 12) 15. ( 1.11 2.01E -1 13 ( 2.4 i 3.0)E -1 (-2.3 r 1.1)E -1
( 0? (-7.4 - S.7)E -1 (-5.8 - S.7)E -1 (-5.7 - 4 E -1
.( 0/ S). .' 0/ 4). .( O! fi+
FE-59 ( 12) % ( 7.7.+ 8.61E -l 13 ( 2.0 t 1.2)E O ( 6.5 1 14.6'E -:
f ( 3.6 - 55.2)E -1 (-1.7 - 4.;a! 0
( 0) (-2.7 - 5.51E 0
.( O! 3)* .( 0/ 4). .i O' 4" CB-60 ( 121 15. ( -2.6 2.2:E -1 24 ( 4.3 t 3.61E -1 ( 4.3 LI E -:
( 0) (-1.2 - .5)E O (-5.1 - 11.9)E -1 (-5.1 - 1:.tE -1
.( 0/ 8). .( 0/ 4). .( O! 4).
ZN-65 ( 12) % ( -3.0t 6.2)E -1 24 ( 1.2 t 2.2)E O ( 1.2 t 2. iE 0 i
( 0) (-2.6 - 2.5)E O (-2.8 - 7.2)E O (-2.8 - 1.2iE e f
- ( 0/ 8). .( 0/ 4). .I 0/ 4)+
ZR-95 ( 12) 15. ( 5.0t 4.7)E -1 13 ( 1.0 t .7)E 0 ( 4.2 t 2.01E -1
( 0) (-1.6 - 2.91E 0 (-5.5 - 289.0)E -2 (-1.0 - 7.6!E -1
.I 0/ 8)+ .( 0/ 4). .( 0/ 4).
RlH03 ( 12) ( -7.9i 6.4)E -1 11 ( 8,5 t 165.5)E -2 (-3.1 t 4.0)E -1
( 0) (-3.2 - 1.7)E O (-1.6 - 1.7)E O (-1.4 - 4)E O l .( 0/ 8). .( 0/ 21. .( 0/ 4).
. NON-ROUTINE REFEF$ TO THE NUEER OF EPMATE MEARREMENTS WHICH WERE GREATER THM TEN (10) TIES TE AWRAGE BACK0ROJC FCR TE FERIOD OF TE REPORT.
.. T4 FRACTION OF SARE ANALYSES YlELDING MTECTAKE MEASLPEMEN15 (1.E. >3 STD KVIATICNS) IS IO!CATED WITW .( )..
EWIRC8 PEN 7AL RADIOLC0! CAL PROC #M SlWW MAINE Y W IE ATCelC POWER STATICN. WISCASSE1. E JANOR- DECEMEER 1986 EDRM: FRESH WATEP !. NITS: PCI A:G
!@lCATM STATICNS STATICN WITH HIGEST EAN CCNTROL STAT 10tr.
nusuunnuen nenn en++en nunnu eneH+nennu RADI(NUCt! DES E/W EAN TAN
( W. ANALYSES) REQUIRED RANCE STA. RAK( - RAKE (WN-ROUTIEl' LLD N9. ETECTEDet NO. W. DETECTED ++ NO. E TECTED++
RU-106 ( 12) ( 7.62 24.2)E -1 11 ( 5.0 t 3.9)E'0 ( 5.8 i 36.4)E -1
( 0) (-8.0<- 9.4)E O ( 1.1 - 8.8)E O (-5.0 - 11.3)E O
+( 0/ 8)* *( 0/ 2)* *( 0/ 4)+
1-131 ( 14) 1. ( -6.21 7.9)E -1 13 ( 6.9 i 9.9)E -1 (-2.1 i 1.7)E O
( 0) (-3.9 - 4.1)E O (-2.0 - 4.1)E O (-6.6 - 1.71E O
- ( 0/ 9)e +( 0/ 5)* +( 0/ 5)*
CS-134 ( 12) 15. ( -1.91 4.71E -! 13 ( 6.1 i 5.7)E -1 (-2.3 t 2.O E -1
( 0) (-1.7 - 2.2)E o (-5.2 - 21.9)E -1 (-8.0 - 5.8)E -1
- (- 0/ Sie +( 0/ 4)* +f 0 41+
CS-137 ( 12) 18. ( -1.lt 4.1)E -! 11 ( 1.0 t 8.0)E -1 (-6.2 f 3.9)E -1
( 0) - (-2.4 -
1.51E o (-6.9 - 9.01E -1 (-1.3 - .51E O
'. *( 0/ Ble *( 0/ 2)+ *( 0/ 4)+
B/-140 ( 12) 15. ( -1.2t .6)E 0 13 (-4.8 i 4.3)E -1 (-1.2 t 1.11E O
( 0) (-3.6 -
.61E O (-1.5 - .6)E O (-4.2 - 1.2 E O
- ( 0/ 8)* *( 0/ 4)* *( O' 4tt CE-141 i 12) f 1.2 .51E O 13 ( l.5 t .5)E O ( 1.1 .4)E o
( 0) (-1,5 - 2.S)E O ( 6.0 - 23.0)E -1 ( 1.0 - 27.3)E -l
- ( 0/ 8)* *' 0/ 4)* *( 0/ 4)*
CE-144 ( 12 ( -7.5t 1.7)E O 24 ( 1.7 f 4.1)E O ( !.7 t 4.1)E o
( 0) (-1. S - .3)E i (-8.1 - 11.2)E O t-8.1 - 11.??E O
- ( 0/ Sie e( O! 41+ *( 0/ 4)+
TH-232 ( 12) ( -1.31 1.9)E 0 24 ( 2.7 i 1.8)E 0 ( 2.7 t 1.8)E O
( 0) (-1,3 - .4)E 1 (-8.0 - 71.4)E -1 (-8.0 - 71.4)E -1
- ( 0/ 8)* *( 0/ Alf *( 0/ 4)*
l l H-3 ( 12) 2000. ( 1.3t .3)E 2 24 ( 1.9 t .9)E 2 ( !.9 t 9)E 2
( 0) (-2.3 - 24.3)E 1 ( 5.5 - 47.1)E 1 ( 5.5 - 47.1)E 1 l
- et 0/ 8)* f( 0/ 4)* *( 0/ 4)+
l l
t I
l e NCN-Rf0 TINE REFERS TO THE NLITER OF SEPARATE EASLRETNTS WHICH WERE CREATER l _ THAN TEN (10) TIES THE A'ERACE BACmWD Fm TE PERIOD CF TE REPORT.
++ TE FRACTION CF SAPPLE ANALYSES YlELDING DETECTABLE EASWEENii (1.E. >3 STD DEVIATICNS) IS INDICATED WITH *( )*.
t 3.7 Precipitation l
l l
l l 'Preefpitation samples were collected and analyzed for H-3 on a i
monthly basis through July 1, 1986. Following this date, precipitation sampling was not required. No H-3 was detected in any of the indicator or control stations.
I <
.i 4
h t
i.
i i
F t
t I
I 0451R J
I J
c ,
EWIRONEN7A'. RADIOLOGICAL FRCCAA9 SUMMM.Y MAINE YtMEE ATCr!( KWEF STATION, W11CAsitT4 E I.
L=
Jtd.EY - DECEM~4P 1*E4 Et. lie: FECIFITtTICN Lt.!'?: Ttla.S L
INDi(ATOR STA*10tt3 STATIC 6 WITH HIGHEST E 44 .00N'RS,STA'!(.'r j- nen++nnennu n++n++nenennen+H+ **n+n+nnun
! RADICWJ1 IDES TAN EAN ' ER STA. R#G R#t'E (NO. E' YCES ~ REQUIRED R4GE (NCN-RCf.fi!NE1' LLD Kt. [ETECTEDn K. 10.ICTECTEDH NO [ETECTEDn H-3 ( 121 2000. ( 3.3t 6.2)E 1 24 ( 9.8 t 7.!!E ! ( 8.6 t 7.!'E !
( ' 0) (-1.4 -
2.71E 2 (-2.3 - 2.5)E 2 (-2.3 - 2.51E 2
- ( 0/ 6)+ *( 0/ 61+ *( 0! 6)*
I NCr;-ROUTINE RFECG TO THE N?SER CF WASATE TAst5fMENTS WICH WESE GEATER TWA*i TEN (101 TIME 3 THE A'.'ER:6E WrM0 Leo FOR TRE PEPIOD OF THE W.00RT.
s 1
3.8 Estuary Water Estuary water is analyzed monthly for gama emitting radionuclides and quarterly for H-3. The two pre-July indicator stations have composite samplers from which samples are collected on a monthly basis. Weekly grab samples are taken from the control location.
Following the implementation of the Radiological Effluent Technical Specifications on July 1, 1986, only one indicator station (WE-12) was required. All of the weekly samples are composited at the laboratory and analyzed monthly. All monthly samples are composited for quarterly H-3 analyses. No gama-emitting radionuclides were detected in the estuary water samples for 1986, other than naturally occurring K-40, and Ru-103 in one control sample as a result of Chernobyl fallout (see Section 4).
B-3 was detected at Station 12 (plant outfall) in the first, third, and fourth quarter composite samples at 590 ! 140 pCi/kg, i
- 2500 1 160 pCi/kg, and 670 1 160 pCi/kg, respectively. These samples are collected in the discharge forebay and do not represent actual environmental levels. When a dilution factor of 10 is applied to estimate environmental levels after passing thrcugh the diffusers in the Back River, the concentrations would be one tenth of the above values. With the exception of the third quarter value, these levels would not be detected when analyzed to currently required LLDs. The reporting level of 30,000 pCi/kg was not exceeded in any case.
The calculated levels of B-3 in the environment would not lead to public intakes in excess of one percent of those that could result from continuous exposure to the concentration values listed in Appendix B. Table II of 10CFR20.
l 1
l 0451R
P ENIRCtMENTAL FAM3LC01 CAL FSXAAM RMFAN PAD.'E YWEE ATCHIC PNER S*ATI% WISCAME'. r2 JAMFF - DECEMBER 1902 EDIUM: ESTUte W TER WIT 9 PC1/F0 INDICATOR STAilCe6 STATION WITH H10EST EM CCt(TROL STAi!(tG e+++eeeee+e+,eee+e a+++++ese+++ tee +++++e+++e esteteete++++e++
RADICNJCLICES EAN EM EAN (NO ANALY?ts) RE0VI C RANGE STA. RANGE REE (NCH-RWi!E)' LLD NO. CETECTEDet N9. NO CETECTEDu NO. CETECTED*+ '
BE-7 ( 30) ( -2.0t 1.5)E 0 20 ( 7.1 t 24.0)E -1 ( 7.1 t 24.0!E -1
( 0) (-1.0 - 1.1)E 1 (-1.9 - 1.0)E 1 (-1.9 - 1.0)E 1
- ( 0/ 18)* *( 0/ 12)* e( 0/ 12)*
K-40 ( 30) ( 2.lt .1)E 2 12 ( 2.1 i .1)E 2 ( 2.4 t .7)E 1
( 3) ( 6.7 - 285.0)E O ( 1.6 - 2.6)E 2 (-3.4 - 4.8)E 1
- ( 17/ 18)+ *( 12/ 12)+ *( 4/ 12),
fH-54 ( 30) 15. ( -2,21 1.4)E -1 20 (-4.8 t 27.7)E -2 (-4.6 t 27.7)E -2
( 0) (-1. 3 - .9)E 0 (-1,6 - 1.3)E O (-1.6 - 1.3)E O
- ( 0/ 18), *( 0/ 12)* *( 0/ 12)+
CD-53 ( 30) 15. ( 3.92 21.5)E -2 12 ( 2.5 t 2.5)E -1 (-3.6 t 1.5)E -1
( 01 (-1.7 - 2.3)E 0 (-9.6 - 23.3)E -1 (-1,3 - .4)E 0 of 0/ 1E1+ et 0/ 12)* +( 0/ 1214 FE-59 ( 30) 30. ( 2.6t A.2iE -1 12 ( 4.S t 4.9)E -1 ( !. t 5.01E -i
( 0) (-2.4 - 3.3)E O (-1.9 - 3.3)E O (-?.2 - 2.9)E O
- ( 0/ 18)+ *( 0/ 12)* *( 0/ 12)*
CC-60 ( 30) 15. ( -4.+1 2.1)E -1 20 f-2.0 t 2.6)E -1 (-2.0 t 2.6)E -1
( 0) (-2.0 - 1.1)E O (-1.5 - 1.1)E O (-1.5 - 1.1)E O
- ( 0/ 18)+ *( 0/ 12)* *( 0/ 12)*
ZN-65 ( 30) 30 ( -1.12 4.0)E -1 11 (10.0 t 8.1)E -1 (-2,2 t 4.2)E -!
( 01 (-2.3 - 4.4)E O (-1,6 - 4.4)E O (-2.8- 1.7)E O
- ( 0/ 18)* *( 0/ 6)* +( O! 12)+
ZR-95 ( 30) 15. ( 2.2t 3.6)E -1 12 ( 6.9 t 4.0)E -1 ( 9.9
- 31.3)E -2
( 0) (-3.2 - 2.7)E O (-1.4 - 2.7)E O (-1.5 - 1.7)E 0
- ( 0/ 18), *( 0/12)* *( 0/ 12)*
l RU-103 ( 30) ( -8.71 2.0)E -1 11 (-2.9 t 3.5)E -1 (-7.7 i 4.8)E -!
( 0) (-2.3 - 1.4)E O (-1.0 - 1.4)E O (-3.0 - 3.5)E O
- ( 0/ 18)* *( 0/ 6)* *( 1/ 12i+
i
- NON-ROJTIE EFERS TO TE N.MECR OF SEPMATE EARPEMENTS WHICN WEE CREATER 4
I THM TEN (10) T!ES TE A'sACE BACKCea.ND FC6 TE PERIOD CF THE REPORT.
++ TE FRACTICN Or S#ftE MALYSES Y!ELDING IETECTAftE EARREENTS (1.E. >3 STD CEVIATICt6) IS INDICATED WITH *( )*.
I EWIRCNMENT#. RADIOLCCICA'. PRCCF#'. 9??lh MA!NE YAWEE ATCMIC FtWER STATION. WISCAS!fT, ME JANUARY - ECEMER 1986 MEDIU": ESTLERY WATER (WS: F(14 0 INDICATCR STAT!0R3 STATION 4!TH HIGE ST E AN COVTROL STAT!0%
eeeeeeeeeeeteneeee ese+e*>.eeeeteteeseeeeeene eeeeeee+eeeeeeee RAD 104.0LICES MEAN EAN MEAN (NO. ANALYEES) RE0V! RED %'OE STA. RAPCf RAW.E (NrW-ROUTIE)' L1.D NO. DETECTED +e NO. N?. ETECTEDee NO CETECTEDee L RU-106 ( 30) ( 6.41 -14.6)E -1 12 ( 9.9 f 14.2)E -1 ( 5.9
- 24.')E -1
( 01 (-8.1 - 15.9)E O (-6.2 - 12.4)E O (-2.0 - 1. L E 1
- ( 0/ 18)* *( 0/ 12)* et 0/ 12),
1-131 ( 30) 15. ( -1,6t 1.1)E 0 20 ( 5.5 t 10.3)E -1 ( 5.5 t :0.3)E -1
( 0) (-1.4 - .5)E 1 (-5.2 - 9.9)E O (-5.2 - 9.0)E O
- ( 0/ 18), *( 0/ 12)* et 0/ 12)e 09-134 ( 301 15. ( -3.2t 1.8)E -1 12 (-2.2 t 2.3)E -1 (-6.1 t 1.* E -1
( 0) (-1.6 - 1.2)E O (-1.3 - 1.2)E O (-2.1 - .2)E O
+( 0/ 18), *( 0/ 121e of 0/ 12),05-137 ( 30) 18. ( 9.61 24.0)E -2 11 (3.6t 2.5)E -1 ( 3.0 : 24.4:E -5 I 0) (-2.5 - 1.21E 0 (-6.7 - 11.0)E -1 (-1.1 - 2.ME O er 0/ 1;s)+ e 0; ete *: 0/ 12 9 BA-140 ( 30) 15. ( -2.0t .6)E O 12 (-1.6 f .9)E O (-1.4 i .!'E O f Oi (-1.1 -
.31E 1 f-7.7 - 3.1)E 0 f-7.3 - 2.0i! .
et O! 10)e et 0/ 1:)+ *( 0/ 12u CE-141 ( 30) f -1.5z 5.9)E -1 20 ( 1.1 .5)E O ( 1.1 "'E . O
( 0) (-4.9 -
3.5)E O (-2.4 - 4.1)E O (-2,4 - 4.)EO
- ( 0/ 18), et 0/ 12), *( 0/ 121e CE-144 ( 30) ( -3.41 1.11E 0 20 (-7.0 t 12.3)E -1 (-7.0 t 12.3)E -1
( 0) (-1.2 - .5)E 1 (-5.0 - 9.0)E O (-5.0 - ?.nE C et 0/ 18), *( 0/ 12)+ et 0/121e TH-232 ( 30) ( -1.lt 5.4)E -1 20 (1.2f 1.1)E O ( 1.2 t 1.1'E 0
( 0) (-4.9 - 3.8)E 0 (-2.5 - 10.7)E O (-2.5 - 10.7)E O
- ( 0/ 18), *( 0/ 12)e et 0/ 12),
H-3 ( 10) 3000. ( 7.2t 3.7)E 2 12 ( !.0 t .5)E 3 ( 9. 3 ?.1)E 1
( 3) ( 6.8 - 250.0)E 1 ( 2.8 - 25.0)E 2 (-2.8 - 32.9)E 1
- ( 3/ 6), *( 3/ 4)e *( 0/ Ale e WJN-ROUTINE PEFERS TO T4 N.MSER CF SEPARATE EAST 0EENTS IMICH WERE OFIATER T)&N TEN (10) TIES TE AVERAGE IACrCRs.ht FOR THE PERIOD CF THE PEPORT.
se THE FRACTICN CF SAfftE ANALYSES Y!ELDIPC CETECTAKE EA9.RETNTS (1.E. >3 STD DEV!AT10P6) 15 !NDICATED WITH et le.
l 3.9 Marine Algae Samples of mixed focus and ascophyllum marine algae were collected from three locations on a quarterly schedule prior to the RETS implementation on July 1, 1986. Each sample is analyzed for gamma emitting radionuclides.
For the set of samples collected on June 10, 1986, I-131 was detected in all three samples and Ru-103 was detected in two. In both cases, the control location (AL-23) had the highest concentration. This, along with the presence of I-131 and Ru-103 in many other sampled media during this period, indicate that f allout f rom Chernobyl was the source of the radioactivity.
Iodine-131 was detected in an algae sample at Station AL-11 in the immediate vicinity of the plant discharge. The level detected on December 1, 1986 was 128 + 10 pCi/kg (wet) and may be attributed to plant liquid discharges. Marine algae is not consumed in any way from this area, so there would be no impact on man. Due to the short half-life of I-131, there would be no impact on the marine environment.
0451R
EWIRCffENTAL RAD 10LOGICA PPC6 RAM RMMAM l%IE YAWEE ATOMIC POWER STATION. Wi$tASSET. E JANUMY - EEMEER 1986 EDitM: ALGAE LNIT5: PCl/KO '.Ei INDICATOR STATION 5 STATION WITH HIC +EST EAN CMTKt STATIOW HHie ttitHtHof e fHfHilf tf4H+Htif HtH 44H H He*Hffte RAD!W.C.lDES EAN EAN EAN (NO. ANALYSES) REQUIRED R46E STA. RANGE R4CE (NON-ROUTINE)' LLD NO. IETECTEDH M). NO. DETECTED ** NO. [ETECTEDH E-7 ( 8) ( 9.0t 2.2)E 1 23 ( 1.4 i .8)E 2 ( !.4 t .8)E 2
( 0) ( 1.7 - 147.0)E O ( 6.4 - 21.9)E 1 ( 6.4 - 21.9)E 1
- ( 2/ 6)* *( 1/ 2)* *( 1/ 2)*
K-40 ( 8) ( 6.21 .2)E 3 12 ( 6.8 i .1)E 3 ( 5.6 t .6)E 3
( 01 ( 5.3 - 7.0)E 3 ( 6.7 - 7.0)E 3 ( 5.0 - 6.2)E 3
- ( 6/ 6)* *( 2/ 2)* *( 2/ 2)*
fW-54 ( 8) ( 3.82 18.0)E -1 11 ( 7.2 i 28.2)E -1 ( 3.4 f 1.71E -1
( 01 (-7.6 - 4.7)E O (-7.6 - 4.7)E O ( !.7 - 5.0!E -1
- ( 0/ 6)* *( 0/ 4)+ *( 0/ 2i+
C0-58 ( 8) ( -2.01 2.5)E O 11 ( 2.8 t 28.4)E -1 (-1.9 t 1.21E O
( 0) (-1.1 -
.7)E 1 (-6.5 - 7.2)E O t-3.1 - .7)E O
- ( 0/ 6)* *( 0/ 4)* 'l 0/ 2)*
FE-50 ( 8) ( -5.6t 5.3)E O 23 ( 5.9 t 7.9)E 0 ( 5.9 t 7.9)E O
( 0) f-2.2 - 1.11E 1 '-1.0 - 13.8)E O (-1.9 - 13.SiE O
- ( 0/ 6)+ +( 0/ 2)+ el 0/ 2)*
CD-60 ( 8) ( 1.9t 13.9)E -1 23 ( 3.9 t .6)E O ( 3.9 .6)E 0
( 0) (-6.1 -
2.8)E O ( 3.3 - 4.5)E O ( 3.3 - 4.5)E (-
- ( 0/ 6)* *( 0/ 2)* *( 0/ 2)*
ZN-65 ( 8) ( -2.St 5.1)E 0 12 ( 2.5 t 5.7)E O (-1.5 t 7.0)E O
( 0) (-2.4 - 1.1'E 1 (-3.3 - 8.2)E O (-9.4 - 6.4)E 0
- ( 0/ 6)* *( 0/ 2)+ *( 0/ 2)*
ZR-95 ( 8) ( 2.61 2.7)E O 12 ( 3.3 2 2.1)E 0 (-3.6 t .1)E O
( 0) (-7.1 - 12.9)E 0 ( 1.2 - 5.3)E 0 (-3.7 - -3.5)E 0
- ( 0/ 6)* *( 0/ 2)* *( 0/ 2)*
RU-103 ( 8) ( 4.lt 4.4)E O 23 ( ).8 t 1.2)E 1 ( 1.8 t 1.21E 1
( 0) (-4.7 - 21.7)E 0 ( 5.8 - 29.3)E O ( 5.8 - 29.3)E o
- ( 1/ 6)* *( 1/ 2)* *( 1/ 2)*
- N)Nf0JTIPE REFERS TO TK N.M!ER 7 SEPMATE TASLFEENTS WH104 WEPI OREATER THAN TEN (10) TIES THE AVERACE Bl&CM10 FOR THE PERIOD OF TE REKRT.
EN.'ISMMAL Rf01C(0GICAL PR00 RAP',9.rWAY SINE YA'r~.E ATCNIC POWER STATICN, WISCASSET. E MIAR) - KEMBER 1986 EDIT: ALC4E UNITS: PCl/KG WET INDICATOR STATIONS STATION WITH HIGEST EAN CCNTROL STATICNS nen*++neeenne neennen+++nunenn n+n++enn n n RADICNJCtlDES MAN EAN EM (NO ANALYSES) RE0VIRED RANGE STA. RANCE R/#.(
(NON4UTIEl' LLD NO. ETECTEDie NO. NO. ETECTEDt+ NO. ETECTED+*
RU-106 ( 8) ( 4.61 4.9)E O 23 ( 3.2 i .7)E 1 ( 3.2 i .7)E 1
( 0) (-1.5 - 2.2)E 1 ( 2.5 - 4.0)E 1 ( 2.5 - 4.0)E 1 at 0/ 6)* *( 0/ 2)e *( 0/ 2)*
l-101 ( 8) ( 6.0t 2.6)E 1 23 (10.0 t 9.4)E 1 (10.0 t 9.4)E 1
( 0) (-2.2 - 142.0)E 0 ( 5.1 - 194.0)E O ( 5.1 - 194.0)E O
- ( 3/ 6)* *( 1/ 2)* *( 1/ 2)*
CS-134 ( B) ( -1.5 1.3tE O 12 ( 7.5 t 9.4)E -1 (-5.0 t 1.1)E O
( 0) (-6.4 - 1.7)E O (-1.9 - 16.9)E -1 (-6.2 - -3.91E O
- ( 0/ 6)* *( 0/ 2)* *( 0/ 2)*
Co-137 ( B) ( 3. 01 1.01E O 23 ( 6.3 t 4.7)E O ( 6.3 2 4.7)E O
( 01 (-S.8 - 63.9)E -1 ( 1.6 - 11.0)E O ( !.6 - 11.0)E O
- f 0/ 6)* *( 0/ 2)* *( O' 2)*
Ec-140 ( 3) ( -4.2t 3.!!E O 11 (-1.1 t 3.6)E O (-8.3t 7.7tE 0
( 0) (-1.3 - .51E 1 i-1.2 - .5)E 1 (-1,6 - .11E
- ( O! 61* *( 0/ 4)* *! O/ 2'e M-141 ( S: ( 4.0t 9.5iE -1 23 ( 1.4 i .3)E 1 ( !.4 t .3:E
! C) (-1.C -
4.41E O ( 1.2 - 1.7)E 1 ( !.2 - 1. ' E !
- ( 0/ 6)* *( 0/ 2)e *( 0/ 2)*
E-144 ( S' ( -2.0t S.1)E 0 12 ( 6.6 t 22.7)E O (-2.0 t .71E 1
( 0) ( 2.3 - 2.c1E 1 (-1.e - 2.9)E 1 (-2.7 - -1 J. E :
- ( 0/ 6)+ *( 0/ 2)* *( 0/ Ole TH-232( 8) ( 2.6t .5)E 1 12 ( 2.6 i .6)E 1 ( 2.6 t .3JE I
( 0) ( 6.5 - 41.0)E 0 ( 2.0 - 3.2)E 1 ( 2.3 - 2.H E 1 et 0/ 6)* *( 0/ 2)* *( O! 2)*
- NON-ROUTIE REFERS TO TE N.Mi(R CF SEPARATE EASUREENTS WHIO4 ERE CREATER THM TEN (10) TIES TE A'EPKE BACKC#J.ND FCR TE PERIOD OF TE REK6T.
3.10 Sediment Sediment core samples were collected from four locations during May and November. The Cs-137 detected in sediment is partly due to early plant operation, when routine liquid effluents from the plant were discharged in this area. Due to poor diffusion, a discharge diffuser was installed and liquid effluents are now discharged into the Back River. Some of the Cs-137 is due to nuclear weapons testing fallout, as can be seen from the control station measurements. As can be seen in the following tables, when compared to the 1985 report, the mean concentration and maximum concentration for the indicator stations and the station with the highest mean, both decreased from 1985 to 1986, while those values for the control location increased.
In addition to Cs-137 and Co-60, naturally occurring Be-7, K-40, and AcTh-228 were detected in sediment samples.
Cobalt-60 was detected in the 0-5 cm segment of a core taken at Station SE-18, which is in the vicinity of the plant discharge.
The concentration was marginally detectable at the three-sigma level (46 1 14 pCi/kg - dry). There is no reporting level for Co-60 in sediment, but one might appreciate the negligible dosimetric consequence when compared to the reporting level for edible fish of 10,000 pCi/kg. Furthermore, this site is not occupied, nor is it used for recreational purposes, since it is within the site boundary.
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E$'!W.TNTAL RADIOLOGICAL PRC6 RAM SI.mfRY Mite YRAIE ATCet!C M1WER STATION, WI!CASSET. E JA U RY - DECEMBEE 1986 MED:7.: "!DINENT UNITS PCI/r0 DRY ICICATM STATIOW STATICH WITH HIGFEST EAN CCNTROL STATICNS ennnununne nennunnu nn+nne un++nnuun RAD 10VJCLIDi? t'Etd EAN EAN (W. ANA_YMS) RE0'JIRED R"4'OE STA. RAN'{ REE W. MTECTEDn NO. W). MTECTEDu NO DETECTEC++
( D -ROUTINE)' LLD EC-7 ( 18) ( 9. 6f 4.8)E 1 16 ( 1.3 i .5)E 2 (-5.1 t 48.0)E O
( 1) . (-1,3 - 5.2)E 2 ( 4.1 - 37.9)E 1 (-9.6 - 6.6)E 1
- ( 1/ 15)* *( 0/ 6)* *( 0/ 3)+
f-40 ( 18) ' !.F .0)E 4 18 ( 1.9 i .0)E 4 ( 1.6 i .0)E 4
( 0) ( 1.0 - 2.01E 4 ( 1.0 - 2.01E 4 ( !.0 - 1.71E 4 H 15/ 15)* *( 6/ 6)+ *( 3/ 3)+
M+54 ( 181 i -1.51 .4)E 1 29 (-7.5 t 6.1)E O (-7.5 t 6.!)E O
( 0) (-3.6 - 1.1)E 1 (-1.9 - .2)E 1 (-1.9 - .2)E 1
- ! O/ 15)* *f 0/ 3)* if O! 3)*
CO-58 ( 19) ( -9.St 4.2)E O ?? (-1.2 i 10.6)E O (-1.2t 10.61E
( 0) (-3.2 - 2.9)E 1 (-2.2 - 1.4)E 1 (-2,2 - 1.4tE i t( 0/ 15'+ +t 0! 3)t *( 0/ 3R FE-59 ( 18) ( -) St 1.1)E 1 !! ( 9.4 t 14.2)E O l 4.0 t 4.6)E 0
( 0) f -8. 7 - 5.! E 1 (-4.6 - 5.8)E 1 ( !.3 - 16.9)E O
+ 0/ 15t+ *( 0/ 6)* +( 01 34 CD-69 ( 181 1 1.At .5:E 1 16 ( 1.8 i .4)E I (1.6t 1L91E 0
( 11 (-1.2 - 5.9)E 1 (-1.9 - 26.9)E O (-2.2 - 1.7)E 1
- ( 1/ 15)* *( 0/ 6)+ *( O! 31+
IN-65 ( IS' ( -1.lt 9.2?E 0 2? ( 1.4 1 2.7)E 1 ( 1.4 t 2.71E 1
( O! (-5.5 - 7.6)E 1 (-2.5 - 6.5)E 1 (-2.5- 6.5?E 1 5; 0/ 15)* +( 0/ 3)* e' 0/ 3)*
1.ft !.6)E O 2* ( 1. 4 * .1)E 1 ( 1.4 t .1)E 1 IR-95 ( 18) (
( 0) (-5.1 -
3.8)E 1 ( 1.2 - 1.6)E 1 ( 1.2 - 1.61E !
- ( 0/ 151+ *( 0/ 3)e et 0/ 3)e
( 6.9f 5.0)E O 16 ( 1.5 t 1.0)E 1 (-4.9 t 7.11E o RV-103 ( 181
( 0; (-2.0 - 5.4)E 1 (-1.2- 5.4)E 1 (-1.7 - .7)E 1
- ( 0/ 15)* *( 0/ 6)+ *( 0/ 3)*
- NON-ROUTINE REFERS TO TE ff.P5ER CF SEPARATE EASLRDENTS WHICH ERE GREATER THAN TEN (10) T!MES M AVERACE BACKCIGND FM M KRIOD OF M REPORT.
- M FRACT!CN OF !#FtE ANALYMS Y!ELDING MTECTABLE EASLREENTS
)*,
(I.E. >3 STD M VIATIONS) IS INDICATED WITH et EWIR0mDJTR. RADIOLOGICAL PROGRAM Strt%RY f%INE Yt&EE ATOMIC POWER STATICH, WIMASSET. E JANJARY - K E MBER 1986 MEDILN: EDIMENT LNITS: PCl/r0 DRY INDICATOR STATIONS STATION WITH HIC 4EST MAN CONTROL STATIONS
++++eeee*,ee+eeees ++eeeee+++++,ee+++e+eneet *****++++++eeeet RADION.tllCES MEAN EAN EAN (NO. ANALYSES) REQUIRED RANCE STA. RANGE RACE (W-RGJTINEl' LLD NO. ETECTEDe+ NO. NO. DETECTED +e NO. ETECTEDet RU-106 ( 18) ( -4.0t 3.3)E 1 29 (-1.2 i 6.1)E 1 (-1.2 i 6.1)E 1
( 0) (-2.5 - 1.4)E 2 (-8.8 - 10.9)E 1 (-8.8 - 10.9)E 1
- ( 0/ 15)+ et 0/ 3)* *( 0/ 3)+
I-131 ( 18) ( -3.3t 3.1)E 1 29 ( 4.9 t 4.6)E 1 ( 4.9 t 4.6)E 1
( 0) (-2.1 -
2.5)E 2 (-1.5 - 13.7)E I (-1.5 - 13.7)E 1
- ( 0/ 15), *( 0/ 3)+ *( 0/ 3)*
CS-134 ( 18) 150. ( 2.4r 3.3)E 0 16 ( 9.5 t 5.6)E O ( 3.6 i 4 M IE -1
( 0) (-1.3 - 3.4)E 1 (-8.4 - 33.8)E 0 (-7.7 - 4.9)E O
+' 0/ 15)* *( 0/ 61* et 0/ 3)*
CS-137 ( 18) 180. ( 2.4f .3)E 2 16 ( 3.1 i .3)E 2 ( 6.4 t 1.1)E 1
( 0) ( 7.7 - 41.1)E 1 ( 2.1 - 4.1)E 2 ( 4.0 - 9.6)E 1
. +( 15/ 15'+ +f 6/ 6)+ *( 3/ 31.
BA-140 ( 18) ( -5.it 1.8)E 1 M ( 1.8 t 25.3)E O ( 1.8 t 25.3)E O
( 0) (-1.7 - 1.2)E 2 (-4.3 - 4.5)E 1 (-4.3 - 4.5)E 1
- ( 0/ 15)* +( 0! 3)+ ei 0/ 3)+
CE-141 ( 18) ( 8.7t 9.9)E O 18 ( 3.6 1 1.1)E 1 ( 1.5 t 3.0)E !
( 0) (-9.0 - 7.5)E I (-3.0 - 7A.7)E O (-3.0 - ' 31E 1
- ( 0/ 15)# et 0/ 6)* et 0/ 3)+
CE-144 ( 18) ( -6.(t 2.2)E 1 12 (-5.3 i 4.8)E 1 (-5.3 t 3.5)E 1
( 0) (-2.2 - !.11E 2 (-1.2 - 4)E 2 (-1.0 - .1)E :
+( 0/ 15)+ el 0/ 3)+ *( 0/ 3)*
TH-232 ( 18) ( 7.52 .3)E 2 18 ( 7.9 t .5)E 2 ( 4.7 t .5)E 2
( 0) ( 5.3 - 9.4)E 2 ( 6.8 - 9.4)E 2 ( 3.8 - 5.6)E 2
- ( 15/ 15)e *( 6/ 6)* *( 3/ 3)*
- NCN-RC8JTIE REFERS TO TE NM(R CF EPARATE EA?tREENTS milch WEff @ EATER l TH41 TEN (10) TIES TE AYERAGE BACK@0.ND FCR TE PERIOD LT TE REPCGT.
es TE FRACTICH CF $#FLE #dLYES Y!ELDING CETECTABLE EAftREMENTS (1.E. >3 STD DEVIATIONS) IS INDICATED WITH et )+.
3.11 Finfish i:
Five finfish samples were collected during 1986. Each sample was analyzed for gama-emitting radionuclides. Except for naturally occurring K-40, no radioactivity was detected in the fish samples during 1986.
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EWIKNMEKTAL RADICWICAL PROMM Ref9Rf f%INE Y W EE ATCNIC KlWER STATICN. WISCASE Ti ME JANLW Y - M CEMBER 1086 EDilF: FlWISH LN!TSt PCl/KG WET INDICATOR STATICf6 STATION WITH HitHEST E M CCNTRnL STATIONS unnenennun uneneneennuennu nunnesenen RADICNXLIES EM EM EM (O. ANAlfES) REQUIRED REE STA. REE REE (W)N-R3Ji!E)' LLD NO. IETECTEDet NO. NO. E TECTED++ NO. ETECTEDn
=. __
K-7 .( 5) ( -1.3t 3.6)E 1 23 ( 5.9 t 7.1)E 1 ( 5.9 t 7.1)E 1
( 0) (-9.9 - 5.3)E 1
- ( 0/ 4)* *( 0/ 1)* *( 0/ 1)*
K-42 ( 5) ( 2.91 .5)E 3 12 ( 3.3 i .8)E 3 ( 2.1 t .2)E 3
( 0) ( 1.9 - 4.1)E 3 ( 2.5 - 4.1)E 3
- ( 4/ 4)+ *( 2/ 2)* *( 1/ 11+
IH-54 ( 51 130. ( 6.0t 3.4)E 0 12 (8.2i 5.6)E O ( 7.0 t 79.11E -1
( 01 (-1.6 - !?.8)E O ( 2.7 - 13.8)E O
- ( 0/ 4)+ *( 0/ 2)+ *( 0/ 1)*
CD 'A: ( 5) 130 ( -B.22 7.6)E -1 23 ( 3.7 t S.5)E O ( 3.7 t f 5)E O
( 0) (-2.2 - 1.3)E O
+( 0/ 4)+ *( O' 11+ +' Oi 1)+
FE-59 ( 5) 260. ( 6.5t S.2)E O 12 ( !.1 t .S!! 1 (-5.1 t 2.1)E 1
( 01 (-1.5 - 1.91E 1 I ?.4 - lt.31E O
- t 0/ 4)+ et of 2)+ +f 0/ 1H CD-r> ( 5' 130. ( -5.2t 6.61E O 11 ( !.4 1 6.2'E 6 f-2.7 t 12.4'E C
( O! (-2,3 - .S'E 1 (-4.6 - 7.51E 0
- ( 0/ 4)* *( 0/ 2)* 'I 0/ lb 2N-6', ( 53 266 ( -1.4f .81! 1 11 (-2.4 t 11.41E O (-3.7 t !.?;E 1
( O! (-2.S - 9)E 1 (-1.4 - 9)E 1
+f 0/ 4)+ +f O' 2)e et 07 )?<
ZR-95 ( 5) ( 4.41 5.8)E 0 12 ( 1.1 t .8)E 1 ( 8.9 t 16.1)E O
( 0) (-9.5 - 16.8)E 0 ( ?.6 - 18.8)E O
- ( 0/ 4)* *( 0/ 2)* *( 0/ 1)*
RU-103 ( 5) ( -1.9k 3.8)E 0 23 ( 3.1 i 9.9)E 0 ( 3.1 i 9.8)E O
( 01 (-1.0 - .8)E 1
- ( 0/ 4)e f( 0/ 1)* *( 0/ 11e l
- W.N-ROUTINE REFERS TO TE N.t9ER OF EPARATE EAStRETNTS WICH ERE CREATER TH/W TEN (10) TIMES TE A'.tT@E ECCO.ND FCR TE PERIOD F THE REPCRT.
++ THE FRACTICN CF S/Wti MA'.Y!ES YlELDIO MTECTABLE EASLREENTS 18
(!.E. >3 STD C(v!ATICr/'.) 15 IND:CATED WITH et EIMKecEt#A'. RADIOLOGICAL PROGRM 9.MMAW 19fNE YWEE ATCMIC PCWER $TATION. WISCASSET. E JM#AY - [EMPI(R 1986 ED!lr.: FIW!!F LNITS: PC1/r0 WET INDICATOR STATICNS STATION WITH HIC +EST EM CtWTROL STATICNS sensesnumun mumssnnmumen nsmmenem RAD 1C#4 RIDES TAN EM EM STA. PAWE RANCE
. RJ-106 ( 5) ( -8.4t 3.3)E 1 23 (-6.2 i 7.6)E 1 (-4.2 t 7.6)E 1
( 0) (-1.5 - .1)E 2
- ( 0/ 4)* *( 0/ 1)* *( 0/ 11* ,
1-131 ( 5) ( 1.52 1.7)E 1 11 ( 2.2 t 2.3)E 1 (-8.1 1 6.6)E 1
( 0) (-2.5 - 4.4)E 1 (-1.1 - 44.2)E o f( 0/ 4)* +( 0/ 2)* *( O! 1)*
CS-134 ( 54 130 ( -3.G t 66.3)E -1 11 ( 9.7 t 4.7)E O (-6.9 i 8.31E O
( Oi (-1.e - 1.4)E 1 ( 5.0 - 14.4)E O
- ( 0/ 4)+ *( 0/ 2)* *( 0/ 1)+
CS-137 ( 51 150. ( 7.!! 5.0)E O 11 ( 1.2 t .9)E 1 ( S.: t 7.6'E O
( 01 (-1.4 -
21.51E O ( 2.9 - 21.51E 0
+f O! 4)# el (U 217 *( 0/ 1)+
-S.41 10.61E O ( 6.5 t 6.7)E O (-3.0 t 2.5'E 1 M-140 t 5) ( 11
( C' '-3.e - 1.SiE i (-2.2 - 15.21E O
<l Q/ 4)* et (1/ 2)+ ff (o 1)*
M-141 i 55 i 1.9 6.6:( 0 2? ( 2,$ i 1.$1E 1 ( 2.5 t 1.51E I
( O! (-1.1 -
1.2)E 1
- ( 0/ 4)+ et 0/ 1)* *( 0/ 1)*
CE-144 ( 5; ( -8.1t 37.51E O 11 ( 4.4 t 1.2)E 1 (-3.5 t 3.6'E :
( 0) (-1,1 - .6:E 2 ( 3.1 - 5.6)E 1
- ( 0/ 4)+ *( 0/ 2)* +f 0/ 1)+
1H-232 ( 5) ( 2.32 1.2)E 1 23 ( 4.3 t 3.6)E 1 ( 4.3 t 3.6)E 1
( 0) (-2.1 -
50.7)E 0 et 0/ 4)* *( 0/ lie *( 0/ 1)*
- NorHOJTIE REFERS TO TE NJMEER OF SEPMATE EASUREENTS WICH WERE CREATER l
TWN TEN (10) TIES TE A'KRACE BACKCf0.ND FCR TE PERIOD CF TE REKGT.
E 3.12 Mussels Eight mussel samples were collected.from a total of three locations in 1986. Each sample was analyzed for gamma-emitting radionuelides. Except for naturally occurring K-40, no radionuclides were detected in any sample.
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EN'.'IRONMENTA'. RADIOLOGICAL PROCA/7. 93WeY MAINE YIREE ATCMIC K1WER STATION. WISCASSET. ME M2Y - DECEMKR 1986 EDitm 19)i1EL LNITS: PCl/KO WET INDICATC6 STATIONS STAT!(N W!TH HIC +EST EM CONTROL STATION $
titHittHitHilf t efftett H H H etit M M +tti fHtHtHfHitH RADION'.f.tIK5 EM EAN EAN (NO. MYSES) RE0V: RED REE STA. RMCE RAKf (KN-ROUTINE)' 1.LD NO. [ETECTED+5 NO. NO. DETECTED +* N). DETECTED *+
BE-7 ( 8) ( 7.7f 6.6)E 1 11 ( !.1 i 1.0)E 2 (-3.7 t 3.3)E 1
( 0) (-7.1 -
28.3)E 1 (-7.1 - 28.3)E 1 (-1.0 - .1)E 2
- ( 0/ 5)* *( 0/ 3)* *( 0/ 3)*
K-40 ( 8) ( 8.72 1.4)E 2 23 ( !.2 t .1)E 3 ( !.2 i .1)E 3
( 0) ( 5.6 - 13.0)E 2 ( 1.0 - 1.5)E 3 ( 1.0 - 1.5)E 3
- ( 5/ 5)* *( 3/ 3)* *( 3/ 3)*
PN-54 ( . 8) 130. I 2.6i 2.2)E 0 23 ( 1.1 i 1.3)E 1 ( 1.1 t 1.3)E 1
( 0) (-3.7 - 7.81E 0 (-5.7 - 34.6!E O (-5.7 - 36.6)E O
- ( 0/ 5)* *( 0/ 3)* +( 0/ 3)*
CO-53 ( S) 130. ( !.8t 5.7)E O 12 ( 7.3 t 9.8)E O (-1.3 t .8)E 1
( 0) (-7.8 - 21.6)E O (-2,4 - 17.1)E 0 (-2.8 - .5)E 1
+( 0! 5)* et 0/ 2)* *( 0/ 31+
s FE-59 ( 81 260. ( -1.92 1.2)E 1 23 (3.6t 8.4)E O ( 3.6 t 6.4)E O
( 0) (-6.2 - 1.1)E 1 (-5.7 - 20.3)E 0 (-5.7 - 20.31E ^
0/ 5)* +( 0/ 3)* +f 0/ 3)+
CD-66 ( F) 130. ( 10.01 343.4 E -2 12 ( 4.6 i 5.9)E 0 (-1.2 t 1.11E 1
( 0; (-1.1 - 1.1)E 1 (-1.3- 10,5)E 0 (-3.2 - .7)E 1
- ( 0/ 5)+ *( 0/ 2)* *( 0/ 3)*
IN-65 ( Si 260. ( 7.62 10.6)E 0 11 ( !.2 t 1.2)E 1 ( !.0 t .6)E 1
( 0) ' 2.4 - 3.01E 1 (-9.9 - ??.9)E O (-2.3- 19.2)E O
- ( 0/ 5)* ef 0/ 3)* *( 0/ 3)+
IR-95 ( 8) ( !.3t .7)E 1 11 ( 2.2 t .8)E 1 ( 7.5
- 9.4)E O
( 0) (-9.0 - 33.4)E O ( 6.7 - 33.4)E 0 (-5.2- 25.91E 0
- ( 0/ 5)* *( 0/ 3)* *( 0/ 3)*
RLH 03 ( 8) ( 5.02 9.3)E 0 12 ( 9.2 i 8.6)E O (-3.6 t 6.3)E O
( 0) (-2.8 - 2.5)E 1 ( 5.1 - 178.0)E -1 (-1.2 - .9)E 1
- ( 0/ 5)* *( 0/ 2)* *( 0/ 3)*
- (JWJ.IT!E REFERS TO TE N. PIER & SEPMATE EA9.FEENTS WHICH WEFE C41ATER TWIN TEN (10) TIES TE A'.'ERAGE BACKCf0.ND FCR TE PER100 CF TE EKFT.
EWIKerENTAL RADIOLl%! CAL PRMAM 9) MARY MAIE YANIIE A'OMIC POWER STATION, WJSCAISET E JWMY - IEEMBER 1986 ECW.: ffh!EL t. NITS: PCl/k0 WET INDICATM STATIONS STATIC $i W11H H10T ST E AN CCNTROL STATIONS unte*+entneut neuenen+nnuneun unnunnene RAD 10Pf.Ct![ES PEAN EAN EAN (PO. AN',LYits) RE0VIPED R!EE STA. PME RATE
( S -ROUTINE)' LLD M. DETECTED ** NO. NO. DETECTEDn NO. DETECTEI4' Rr106 ( 8) ( -8.4f 2.9)E 1 23 ( 5.1 t 3.9)E 1 ( 5.1 t 3.9)E 1
( 0) (-1.7 - .11E 2 ( !.1 - 12.')E 1 ( 1.1 - 12.9)E 1
- ( 0/ 5)+ *( 0/ 3)+ *( 0/ 3)*
l-131 ( 81 ( 6.9t 3.91E 1 1) ( 7.2
- 6.7)E 1 (-1.7 1 2.5)E 1
( 0) (-6.5 - 205.0;E O (-6.5 - 205.0)E O (-6.8 - 91E 1
- ( O! 5)* *( (:/ 3)* +! O/ 3)*
C? 134 ( Si 1 X'. ( -1.11 4lE 1 23 ( 2.6 i 4.3)E O ( 2.6 t 4.3!E o
! ( 0) (-2.5 - .3:E 1 (-5.2 - 9.SiE O (-5.0 - 9.$'E 0 e' or 5!+ et or 3), e m 3a
( 8.5 t C3-13' f 5 1%. ( 2.7t 4.5'E O 23 ( 5.E t 7.7)E O 7.7)E O
' 0; (-$.2 - 15.2 E C (-6.4 - 10.2)E O (-6.4 - It?)E O
". 0/ 5'+ e, Ol 3)* *' 0/ 3)e I4-140 ( 8) ( 2.5: 10.7.E '
0 ?? ( 2.2i 71E 1 (2.2i .7iE 1
( 01 <-2.0 -
- i. o E: ( 1.6 - 3. ' E 1 ( !.0 - 3.4'E e- 0/ r. i e *( tr 3), et 0< 3)*
G -141 ( Si ( 3.61 4 ?'E O 12 (1at 1.6)E 1 ( 0.6 2 76.8E -1
( 0) (-8.6 - 20.9:EO (-2.! - ?h?)E O (-f.5 - 15.0t!
et 0/ 5)* '( O' 2)+ '( 0/ 31' CE-144 ( Si ( !.31 1.7)E 1 !? ( !.6 t 2.5)E 1 (-6.0 t 3.1)E 1
( 0) (-1.0 - 6,1)E 1 (-8.5 - 41.0)E O (-1.2 - .:)E :
e' or 59 et 0/ ?>t et 0/ !a +
TH-232 ( 8) ( 4,11 1.4)E 1 12 ( 4.3 t 3.6)E 1 (-4.2 t 11.6)E O
, ( 0) ( 6.9 -
79.3)E 0 ( 6.9 - 79.3)E 0 (-2.7 - 1.01E 1
- ( 0/ $)e +( 0/ 2)* et 0/ 3)*
e KN-ROUTIE REFERS TO TE UEER 7 SEPARATE EAstREMENTS WICH WERE GIATEP TiWI TEN (10) TIMES TE A'.ERACE Emm0lc F@ T{ PERIOD 7 THE PEKAT. !
a TE FRACTICN OF ?#t?LE ANALYtts Y!ELDIO EETECTABLE EADETNTS
- (1.E. >3 (TL CEV!/JICN?) 15 Iht XATED WITH *( )*.
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3.13 Crustaceans .
Crustacean samples consisted of nine crab samples collected fr'om four locations, and three lobster samples collected from three locations over the course of 1986. Each sample was analyzed for gamma-emitting radio.uclides. Other then the naturally occurring K-40, no radionuclides were detected in any of the samples.
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EWIRC88 ENTAL RADIOLOGICAl. PRCGM Slf%RV MIE YANKEE ATCMIC PWEP STATION. WISCAY:ET. ME JAW.iAFi - DECEMIER 1986 EDitM: (RJSTACEms th!TS: PCI/KO WET INDICATOR STATILE STATICH WITH HIC +EST EM CMTR3,, STAT!CN!
entunn e n e ***
- unennununentene enununton RADIOWIt! DES EM EM KAN (W). A$i.Y!ES) REQUIRED RAKE STA. RA0E RANCE (KW-ROJTIEl' LLD NO. CETECTED++ 10. NO. 2i'ECTED+e W). IETECTED++
EE-7 (12) ( 2.5 2.6)E 1 11 ( 8.6
- 3.4)E 1 (-7.6 t 4.1)E 1
( 01 (-0. 6 - 14.1)E 1 ( 2.3 - 14.1)E 1 (-1.5 - .1)E 2
- ( 0/ 91e *( 0/ 3)* *( 0/ 3)*
K-40 (12) ( !.8t .2)E 3 11 ( !.9 t .4)E 3 (1.6i .2)E 3
( 0) ( 8.1 -
30.9)E 2 ( 1.1 - 2.5)E 3 ( 1.1 - 1.9)E 3
- ( 9/ 9)+ *( 3/ 3)* f( 3/ 3)+
MN-54 ( !?) 130. ( -5.62 2.8)E O 24 (-7.7 f 22.415 -1 (-7.7 t 22.4'E -1 .
( 0) (-1.5 - 1.!)E 1 (-5.1 - 2.41! 0 (-5.1 - 2.4)E 0
- ( 0/ 9)* *( 0/ 3's +( O' 3)*
CO-58 ( 12) 130. ( -6.6t 1.9)E O 24 i-1.0 t S.N! 0 (-1.0 t 8.01E O f 0) t-1.5 - .2)E 1 (-?.S - 14.9)E O (-9.8 - 14.0)E O H C/ 9t* *( 0/ 3)* ef 0/ 3)*
FE-50 ( 12) 260. ( 1.21 1.0)E 1 13 ( 3.0 1.2)E 1 ( !.5 x 7)E 1
( 0) (-3.7 -
4.01E 1 ( 9.2 - 49.1)E O ( 4.5 - 3.5)E O et 0/ c)* r or 3)e et o' 33, C0-60 ( 121 130. ( 6.5 3.71E o 13 4 1.1 t .3)E 1 ( 5.7 t 3.5)E O
( 0) (-1.7 -
1.8)E 1 ( 5.7 - 14.0)E O (-9.9 - 1C4.0$E -1
- ( 0/ 9)* ef 0/ 3)e *( 0/ 3)*
ZN-65 ( 12) 260. ( 6.2t 6.01E 0 13 ( 2.2 t 1.3)E i (-2,2 t 1.2)E 1
( 0) (-1.4 - 4.7)E 1 ( 3.2 - 4*.0)E O (-4.2 - .1)E 1
- ( 0/ *)* *( 0/ 3)* *( 0/ 3)*
ZR-95 ( 12) ( -3.9t 6.01E O 13 ( 4.9 t 50.0)E -1 (-2.6 t 1.41E 1
( 01 (-3.7 - 2.5)E 1 (-8.6 - 8.6)E 0 (-4.0 - .2iE 1
- ( 0/ 9)* e( 0/ 3)* *( 0/ 3)'
R'J -103 ( 12) ( 6.lt 25.2)E -1 13 ( 6.4 t 2.4)E 0 (-1.5 t 1.3)E 1
( 0) (-8.7 - 12.01E O ( 2.7 - 10.8)E 0 (-3.8 - .6)E 1
- ( 0/ 9)* e( 0/ 3)e *( 0/ 3)e
' TE AVERACE BACXORaND F@ TE PERIOD CF TE REFWT.
THM TEN (10) T!,iS
- + TE FRACTICN OF SMPLE ANN.Y!ES YlELDIO DETECTABLE EAVfPENTS (1.E. ?3 STD ICVIATIOP6) !$ INDICATED WITH e( )*.
EWIKMEN7R RADIC(.CCICR PRCCRM 9.m4R7 1% NE YANrEE ATCellC KWER STATICN. Wl!CASSET, E JWJMY - CECEMl(R 1986
[ UNITS: PCl/KG WET I EDIlm CRGTt.CEAPG INDICATCR STATIONS STATICN WITH HIC 4EST EM CONTROL STATICt6
+++++eeeeeeeeeeeet see++eeeeee+e+eee***eeeee +++++++4e++eteet 1%DICN.O.!CES MEAN EM EM (N). ANALYSES) RER! RED RW.{ STA. RAWE PAK{
NO. DETECTED ++ NO. NO. K TECTED+e W). K TECTEDee (MW.R9) TINE)' LLD I
RU-106 ( 12) ( -5.0f 1.9)E 1 12 (-3.2 i 2.7)E 1 (-5.2 t 3.8)E !
( 0) (-1.4 -
.4)E 2 (-6.6 - 2.2)E 1 (-1.3 - .1)E 2 at 0/ 9)e et 0/ 3)* *( 0/ 3)*
I-131 ( 12) ( -1.2t 1.71E 1 13 ( l.7 i 50.8)E O (-5.6 t 3.6)E 0
( 0) (-9.0 - 8.6)E 1 (-9.0 - 8.6)E I (-1.5 - .31E 1
- ! 0/ 9), et 0/ 3)+ ef 0/ 3),
C9-134 ( 12) 1% ( -2.3 3.21E O 12 ( 7.6 i 5.5)E O (-1.1 t 1. TIE :
( 0) (-1.4 -
1.7)E 1 (-!.5 - 17.4)E 0 (-3.1 - .7)E 1 et 0/ ?). et 0/ 314 e( 0/ 31.
CS 137 ( 12) 150. ( -1.52 3.3)E O 13 ( 3.8 t 7.7)E 0 ( 1.6 t 5.5)E 0
( 0) (-1.4 -
1.9)E 1 (-5.2 - !?.2)E O (-8.1 - II.0'E O et 0- 5:e et or 36e e' of M
! 3.72 10t.51E -1 11 ( 2.6 s 2.0)E 1 (-8,5 t 3 ';E O IG-140 ( 121
( 0> (-4.5 - e.61E 1 ( 2.6 - 66.1)E ? :- .4 - .4.E e O' 9a e( 0/ 3)e et Cl 3:e CE-141 ( 12) ( 2.2t e.'e! 0 12 (2.0t 1.4)E 1 (-7.6 i 97.OE -!
( 0; (-1.9 - 4.6)E 1 (-5.E - 45.6)E O (-2.1 - 1.21E 1 el (* / 9)e *( 0/ 3). *( 0/ 3)*
CE-144 ( 12) ( -3.0t 1.4)E 1 24 ( 2.2 t 3.01E 1 ( 2.2 t 3.0!E 1
( Oi (-9.1 -
4.9)E 1 (-2.8 - 7.6)E 1 (-2.8 - 7.6)E 1 et 0/ 9), *( 0/ 3). *( 0/ 31e TH-232 ( 12) ( 3.0t 1.1)E 1 11 ( 4.5 t 1.3)E 1 (-6.2 t 9.8)E O
( 0) (-4.1 - 6.1)E 1 ( 2.0 - 5.9)E 1 (-2.3 - 1.1)E 1 I *( 0/ 9)s e( 0/ 3)e et 0/ 3),
e NCM-ROUTIE REFERS TO TE N.MKR OF EPMATE EASLREENTS WICH ERE OREATER T)%N TEN (10) T!ES TE AVERAM IWOIROUND FCP. TE PERIOD OF M EKIRT.
- THE FRACTICN OF SAPPLE AW4.Y!ES Y!ELDIM IETECTABLE EASLREENTS t!.E. >3 STD DEVIATICtm IS IkDICATED WITH *( le.
f . . ..
3.14 Direct Radiation Direct ganna radiation exposure was determined from the use of thermoluminescent dosimeters (TLDs). Six calcium sulfate TLD /
dosimeters were placed at each of the monitoring stations. The sixteen outer ring TLDs were collected and read out on a quarterly schedule. The remainder were read out monthly until the implementation of the RCTS on Ju'.y 1, 1986. Quarterly read-outs were done following this date.
l Two TLD badge sets were lost over the course of 1986. These were at TL-14 in the third quarter, and at TL-18 in the fourth quarter. The first was due spparently to theft in the field, and f the second fell or was knocked out of its holder and was not found until April 1987. Its reading was not used.
The mean Summaries of the results can be seen in the table below.
exposure rates at the inner ring and outer ring stations are
- similar. Additionally, the station with the highest mean is a control location. The mean exposure rate for each category decreased from 1985 to 1986. The above indicates that there were no detectable increases in direct gamma radiation to off-site f locations due to the operation of Maine Yankee, t
Annual average exposure rates are given for each station in l Table 3.1.
l l
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- ___ _____________ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___ ______ ___ ______ ___________ _ _____ J
Environmental Radiological Prcgram Sumraary Maine Yankee Atomic Power Station. Wiseasset, Maine January - December 1986 l
Medium: Direct Radiation Measurements (TLD) Units: Micro-R per Hour Station With Control Inner Ring Outer Rina Hithest Mean Stations Mean Mean Mean Mean Range Range Station Range Range (No. Meas.)* (No. Meas.)* No. (No. Meas.)* (No. Meas.)*
7.7 7.6 10.5 8.5 4.6 - 11.3 6.1 - 10.2 37 9.1 - 12.8 6.2 - 12.8 (156) (64) (8) (24) o Most measurements based on readings from six TLD chips.
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Table 3.1 Maine Yankee Summary of Direct Radiation Measurements - 1986 i Annual Average Micro-R Micro-R Station Per Hour Station Per Hour 1 7.4 21 7.2
- P 2 7.4 22 7.6 3 7.3 23 9.4 4 6.3 24 7.5 5 9.2 25 7.6 6 8.0 26 7.7 7 7.5 27 7.2 8 7.8 28 7.0
, 9 8.7 29 6.9 10 7.5 30 8.5 11 8.1 31 8.5 12 7.5 32 7.7 13 9.4 33 7.4 14 6.8 34 7.4 15 6.8 35 7.0 16 7.5 36 7.3 17 8.5 37 10.5 18 8.0 38 7.8 19 7.5 39* 7.0 20 6.9 0 Station TL-39 lEas discontinued on July 1, 1987. Average is based on 1-January through June measurements.
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l
.w-- - , , - -
4.0 ENVIRONMENTAL RADIOACTIVITY FROM THE CHERNOBYL ACCIDENT Following the Chernobyl nuclear plant accident on April 26, 1986, increased levels of fission-related radionuclides were measured in fresh follout throughout much of the northern hemisphere, including New England.
The amount and type of radioactivity seen in this fallout were roughly comparable to that observed in fallout from the most recent atmospheric n nuclear weapons tests conducted by the Peoples' Republic of China during the 1cte 1970's and in 1980.
Chernobyl-related fallout was seen during 1986 in many types of cnvironmental samples, both near the nuclear power plants and at distant centrol locations, including the Yankee Atomic Environmental Laboratory in f
! Wsstborough, Massachusetts. An in-depth discussion of this entire subject may ba found in Reference 1. This section of this report contains a brief summary of the measured radiological environmental impact in northern New England during 1986 from the Chernobyl accident. Selected monitoring results from ssveral of the plants in New England have been compiled for this summary.
i Many of the measurements were previously reported to the Nuclear Regulatory Commission (via telephone) in response to a request in IE Information Notice 86-32 (Reference 2).
Airborne radioactivity levels measured by gross-beta analysis (see Figure 4.1) show a marked increase during the first week in May. Although the magnitude of the measured concentrations varied slightly across New England, the curves were virtually identical. Very evident in the curves are the first Chernobyl release, measured during the first week of May, and the second rclease, measured during the last week of May and the first week of June.
S;veral radionuclides were identified on air particulate filters by gamma spectroscopy. These were Cs-134. Cs-137, and Ru-103. Ru-106 was also detected at one location at this same time. They are shown in Figures 4.2, 4.3, and 4.4, respectively. Iodine-131 was detected on charcoal filters at all monitoring stations. Its curve, shown in Figure 4.5, is similar to that for gross-beta measurements for air particulate filters.
Several radionuclides were detected in milk samples shortly after their d3tection on air particulate or charcoal filters. These were Cs-134. Cs-137 0451R I
cnd I-131. Since the deposition of this radioactivity occurred after the start of pasture season (for those cows that are pastured), it worked into the cilk pathway readily. Due to its short half-life (8 days), the I-131 was not vsry persistent in the environment, however (see Figure 4.8), Cesium-137 has for many years been detected in cow milk from many locations around New England and the world as a result of the nuclear weapons tests in the 1970's cnd in 1980. Cesium-137 levels (see Figure 4.7) at most locations increased during May due partly to the start of the pasture season (if applicable) and the consequent re-introduction of old Cs-137 into the food chain, and partly due to an increase of Cs-137 levels on pasture vegetation from Chernobyl-related f allout. Cesium-134 was also detected in milk samples.
This isotope of cesium is entirely attributable to Chernobyl, since its rolatively short (2 years) half-life has effectively removed any left over from previous weapons testing fallout. A Cs-137/Cs-134 ratio of approximately 2.0 was noted on air particulate filters, and as one would expect to follow, in milk. The virtual absence of Sr-89 or Sr-90 in the fallout was notable.
This was due to the small amount of strontium released during the accident.
Unlike the gross-beta on air particulate filters and I-131 on charcoal filters, the Cs-134, Cs-137, and I-131 levels in milk varied considerably from location to location due to differences in farming practices. Specifically, types of vegetation fed on by cows and the amount of stored feed given them, cs well as localized differences in deposition of fallout and many other less i portant factors, have a marked effect on the levels of radioactivity in cilk. With respect to milk samples in the winter of 1986/1987, it is expected that the Cs-134 and Cs-137 levels might increase at some locations during the winter months when cows are given feed that was contaminated by fallout during
- the spring of 1986. Figures 4.6 and 4.7 show some early evidence of this I
during the fall of 1986 at several locations.
1 1
As one would expect, fallout f rom Chert.:Syl was measured in other j cnvironmental media such as precipitation and vegetation. Measurements for s3lected radionuclides in precipitation are shown in Table 4.1 and 4.2 for the
! Y:nkee Atomic Environmental Laboratory and the EPA ERAMS Network, respectively.
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Table 4.1 Chernobyl-Related Radioactivity in Precipitation Yankee Atomic Environmental Laboratory. Westborough. Massachusetts ,
(pCi/kg 1 one standard deviation) ,
Collection Period Rainfall (1986) Cs-134 Cs-137 Ru-103 I-131 (inches)
May 7-9 (-0.3 2 1.4) (0.9 1 1.4) (-1.5 1 1.3) 20.4 ! 2.8 .13 May 12 6.9 3 0.3 12.6 i 1.4 15.4 1.6 472 1 5 .027 May 17 6.1 1 1.1 11.9 1 1.2 11.4 g 1.2 68.4 1 2.2 .31 May 21-22 (-0.6 0.5) 1.7 1 0.4 (0.1 0.4) 8.9 1 0.6 .06 May 23-25 2.1 1 0.6 5.0 0.9 9.1 1 1.1 49.6 ! 3.4 .79 May 30-June 1 2.5 ! 0.5 7.3 1 0.8 6.6 2 0.8 14.8 g 1.4 .74 June 5-8 (-1.6 1 0.9) 1.9 1 0.6 (0.8 1 0.8) (0.6 ! 1.2) 5.10 June 11-13 (2.7 ! 1.0) (0.4 ! 1.2) (-0.3 1.2) (3.0 1 1.7) 1.16 June 22-24 (-1.0 1 1.3) (2.2 2 1.3) (-2.3 2.0) (-6.0 2 14.) .07 July 2 (-0.5 ! 0.8) (1.1 ! 0.8) (0.1 ! 1.1) (1.3 1 8.7) 1.79 Measurements in parentheses indicate radionuclide was not detected at the three-sigma level.
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Table 4.2*
I-131 In Precipitation EPA ERAMS Network Date Montpelier, Vermont Concord, New Hampshire (1986) pCi/ liter pCi/m pCi/ liter pCi/m May 2 ND ND ND h3 May 5 ND ND ND ND May 6 ND ND ND ND May 7 120 480 - --
May 8 ND ND 63 20 May 9 ND ND 33 99 May 11 1,660 12,300 -- --
May 12 870 1,740 -- --
May 13 - -- 53 14 May 17 93 750 160 130 t May 19 57 230 -- --
May 20 -- -- -- --
May 21 -- -- -- --
May 22 -- -- 13 78 May 23 14 430 ND ND May 24 -- -- 29 161 May 25 -- -- 18 240 May 28 ND ND 80 11 June 2 ND ND ND hT 2 2 TOTAL 15,930 pCi/m TOTAL 803 pCi/m l
u Taken from Table 20 of Reference 1.
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FIGURE 4.1 i
GROSS BETR MERSUREMENTS OF RIR PRRTICULRTE FILTERS MERN OF RLL STATIONS 0.s l
O.7 -
i O- YANKEE ATOMIC o - VERMONT YANKEE A - MRINE YANKEE 0.s -
+ - SERBROOK STATION X- PILGRIM STATION e
0.s -
a -
T 8 N
0.4 -
b t 2
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it i
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a i i i i i i i it.
a a a a a a a a 8n3W 'n3 / S318n3031d
FIGURE 4.3 CESIUM-137 ON RIR PRRTICULRTE FILTERS NEW ENGLAND CONTROLS 0.14 0.13-O - wit.LIfWtSTOWN, r1R o.12 - 0 - CtESTERFIELD, 741 A - BRTH,t1E
+ - DRESDEN, t1E o.11- X- GEORGETOWN,11R 0 - E. WEYt100TH, t1R o.10- V - WESTBORD, t1R 5
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$ \
0.02 - )r n p 'N 0.C1 -
- n - ~ _
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.AN ftE E M IOf E Jfti O NWt M fftf J1.
1996
FIGURE 4.4 RUTHENIUM-103 ON HIR PRRTICULflTE FILTERS NEW ENGLRND CONTROLS e.no 0 - wit.LIRtSTOWN,11R o- QESTERFIELD, NH A - MTH,_fE o.as - ,_ g x- GEORGETOWN, f1R o - E. NEYtt0UTH f1R o.s - v - WESTBORD, it$
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0 -
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ICY E
JFIN FEB tm ffR ffE .234 .AA. FEE SEP OCT 1986
ld z
Od mm gm m
kgEE i
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o o o e o e o W317J *n3 / S31800031d
)
FIGURE 4.6 CESIUM-134 IN MILK NEW ENGLRND CONTROLS 12.0 11.0 -
O - WILLIfittSTOWN, fift 3o,o. o - BRflTTLEBORD, VT a - HOOLHICH F1E
+ - BOWDOIt&diti, f1E s.O -
X - ROWLEY, t1R o - WHITrif1N, t1R g e.0 -
5 s 3 7.0 -
N, E N 6.G -
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=%
0.0 ; C 0 C C ; _ , , _ _ _m _
tilR fFR fiflY J.N JLA. FUG SEP OCT 10V IEC JfN ITB 1986
FIGURE 4.7 CESIUM-137 IN MILK NEW ENGLRND CONTROLS m.0 3,a _ o - WILLIft1STOWN,11R O - BRRTTLEBORD, VI A - HOOLHICH, t1E
+ - 80WD0Ittet1,11E X - R0WLEY, t1R o - leilTrifti,118 g m.0-5 S S u
\
15.0 -
b 2
8 8 10.0-
{
5.0 -
0.0 : C0 - _
_L : .. i , , , . _ .m _ C _ CC - Z . Z 0
.DI FUI FWR fYW FMY JM JK. RJG SEP OCT lef [EC 1986
g n
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l lf
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=ma iIII!
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5.0 QUALITY ASSURANCE PROGRAM Three separate Quality Assurance programs were performed during 1986 to ,
demonstrate the validity of laboratory analyses by the Yankee Atomic Environmental Laboratory (YAEL).
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 cnalysis. When the results of the cross-check analysis fall outside of the c:ntrol limit, an investigation is made to determine the cause of the problem cnd corrective measures are taken.
YAEL maintains an intralaboratory quality control program to assure the v:lidity and reliability of the data. This program includes quality control of laboratory equipment, use of reference standards for calibration, d3 termination of counting efficiencies and analysis of blank and spiked camples. The records of the quality control program are revic<ed by the responsible cognizant individual, and corrective measures are taken whenever cpplicable.
A blind duplicate program is also used. Samples from five nuclear plants, including Maine Yankee, are prepared from split or homogenous media cod 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 Intralaboratory Results The Quality Assurance Program implemented at the analytical laboratory indicated good precision and accuracy in reported values. Table 5.1 shows the r:sults of accuracy and precision for laboratory analyses in 1986 for intralaboratory analyses and EPA interlaboratory cross-check analyses. For cccuracy, 66.4 and 88.5 percent of the results were within 5 and 10 percent of the known values, respectively, with 96.8 percent of all results falling within the laboratory criteria of 15 percent. For precision, 85.9 and 96.0 0451R
percent of the results were within 5 and 10 percent of the mean, respectively, l
with 100 percent of all results meeting the laboratory criteria of 15 percent.
l The results of the EPA Interlaboratory Comparison Program, when c:nsidered apart from the remainder of the Quality Assurance program, were i
s;tisfactory in 1986. Two hundred and twenty-two analyses were performed on cir particulate filters, milk, and water. Of these 222 analyses, 15 were not included in the overall summary of accuracy statistics due to what the Yankee Atomic Environmental Laboratory considers questionable media. The analyses in question represent four sets of samples, all of which are considered questionable from the standpoint of EPA preparation and known-value 5
calculation. These cases are documented in References 3 and 4. Based upon the corrected sample analysis total (i.e., 207), 206 analyses (i.e..
I 99.5 percent) met the EPA's definition of mean value criteria. The single sample analysis that did not meet the criteria was a Ru-106 analysis in a water sample. A recount of the sample yielded a measurement that met the cbove criteria. (Details of this may be found in Reference 4.)
Blind Duplicate Program A total of 55 paired samples were submitted by the five participating plants for analysis during 1986. The data base used for the duplicate
- cnalysis 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 careement was established. If the paired measurements fall within i 15 percent of their average value, then agreement between the measurements has been met. If the value falls outside of the 3 15 percent, then a two standard deviation range (95 percent confidence level) is established for each of the cnalyses. If the ranges overlap, agreement is obtained.
) One thousand three hundred and sixty-four paired duplicate measurements 8
were analyzed for 1986. A total of 99.1 percent of all measurements fell within the established criteria discussed above. The twelve measurements that did not meet the criteria were measurements of Zn-65 in milk, Mo-99 in milk, i
Co-58 in milk, Mn-54 in seawater, Ce-141 in seawater, Ba-140 in seawater, I
I ) 0451R l
e.-.-,
Table 5.1 EPA Interlaboratory and Intralaboratory Results - 1986 Accuracy Total Number of Samples 0 to 51 0 to 10% 0 to 15%*
840 558 743 813 (64.4%) (88.5%) (96.8%)
Precision Total Number of Samples 0 to 51 0 to 10% 0 to 15%*
815 700 782 815 (85.9%) (96.0%) (100%)
1, .
d O This category also contains those sampics ha*,ng & vorified zero J concentration which were acr~,ysed and found not ta contain the isotope of interest.
0451R l
Zr-95 in sea water Se-75 in mussel bodies, Co-57 in cilk, Ru-103 in gr:undwater Ba-140 in milk, and K-40 in Irish moss. In all but the last ecse, the radionuclide in question was not detected in the sample and a three stcndard deviation acceptance criteria was set. In the last case, the reason fcr the erroneous K-40 concentration was ascertained and the data was carrected. The twelve duplicate measurements represent 0.9 percent of all the blind duplicate paired measurements made during 1986. No trend was evident with respect to repeated failings of measurements for the above radionuclides.
t I
o l
I l
1 0451R
. )
Table 6.1 Maine Yankee 1986 Land Use Census Results Nearest Nearest Nearest Residence Milk Animal Garden Sector (km) (km) (km)
N 1.3 2.7 1.3 NNE 2.3 - 2.5
- NE 1.3 -- 1.3 ENE 0.9 7.1 1.2 E 0.9 -- 0.9 ESE 1.4 -- 1.5 SE 0.7 -- 3.2 SSE 0.9 -- 1.0 S 1.7 -- 2.7 SSW 3.0 -- 5.2 SW 1.4 7.9 3.8 WsW 1.0 -- 3.0 W 2.6 7.2 2.7 WNW 0.8 -- 2.8 NW 2.0 -- 2.0 NNW 1.1 -- 1.1 0451R
7.0
SUMMARY
During 1986, the radiological environmental monitoring program at Maine Y:nkee showed detectable levels of man-made radionuclides in samples of air particulate and charcoal filters, cow milk, mixed vegetation, sediment, estuary water, and marine algae f rom the Maine Yankee of f-site environment.
Each of these is summarized below. In no case were the levels of those r:dionuclides possibly related to plant emissions high enough to result in public intake in excess of one percent of those that could result from c:ntinuous exposure to the concentration values listed in Appendix B. Table II, Part 20. Title 10 of the Code of Federal Regulations. Neither were any reporting levels exceeded, as defined in the Raciological Effluent Technical Specifications.
The Cs-137 and Co-60 levels detected in sediment were determined to be the result of a combination of nuclear weapons testing fallout and plant cperations. H-3 was detected in three estuary water samples at the piant discharge outf all and is apparently due to plant operations. Iodine I-131 was datected in an algae sample in the innediate vicinity of the plant discharge cnd was also apparently due to plant operations. None of these will result in c dose since the sampled media are not consumed.
Strontium-90 and Cs-137 were detected in all milk samples. These icvels were similar to those found in the past and have previously been shown to originate from nuclear weapons testing fallout and to vary from farm to fcrm primarily as a result of dif ferences in the animals' diets.
l l The remainder of the man-made radionuclides mentioned above were caused oither by fallout from atmospheric nuclear weapons tests conducted during the 1970s and 1980 or by f allout f rom the Chernobyl nuclear plant accident in 1986.
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l
8.0 REFERENCES
- 1. S. Farber, "Evaluation of Environmental Radioactivity Resulting from the Chernobyl Accident Measured by the Yankee Atomic Electric Company l Environmental Laboratory," Yankee Atomic Electric Company, March 26, 1987. l l
l 2. USNRC IE Information Notice 86-32 "Request for Collection of Licensee
! Radioactivity Measurements Attributed to the Chernobyl Nuclear Plant Accident," dated May 2, 1986.
- 3. Yankee Environmental Radiation Measurement Laboratory Quarterly Status I Report, April-June 1986, Yankee Atomic Electric Company.
4 Yankee Environmental Radiation Measurement Laboratory Quarterly Status Report, October-December 1986, Yankee Atomic Electric Company.
1 0451R
- C E
I M.
.V O
I mI i
C 0 CT 3O
,V 1 t
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,t tR f TO = PE SBHe1 tECt t ,N f
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i C 0 0 0 o. 0
- o. o. 0 s 0 s 0 5 z 2 2 1 1 g5SGNb188{ 2 S=
FIGURE 4.8 10 DINE-131 IN MILK NEW ENGLRND CONTROLS so.s es.o -
0- wit.LIRtSTOWN, fift 0 - BRflTILEBORD, VT
- 0- A - WOOLWICH ttE 2
+ - BOWD0Itedirt, r1C x - ROWLEY, lift z.o - o - WHIIrifN, rift E
5, c z.e -
b d 1 y x N 25.0-t.J E
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8 ;b:
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0.0 ,C; O C 0 ZZ -- - - - - - - ------- '
JfW FEB F1FR frR FMT .Km .AA. f0G SEP W M E 1986
5.0 QUALITY ASSURANCE PROGRAM Three separate Quality Assurance programs were performed during 1986 to demonstrate the validity of laboratory analyses by the Yankee Atomic Environmental Laboratory (YAEL).
YAEL participates in the EPA Interlaboratory Comparison (cross-check) program for those species and matrices routinely analyzed by the laboratory.
3 This provides an independent check of accuracy and precision of the laboratory cnalysis. When the results of the cross-check analysis fall outside of the c:ntrol limit, an investigation is made to determine the cause of the problem cnd corrective measures are taken.
YAEL maintains an intralaboratory quality control program to assure the validity and reliability of the data. This program includes quality control i
cf laboratory equipment, use of reference standards for calibration, d3 termination of counting ef ficiencies and 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
- cpplicable.
A blind duplicate program is also used. Samples from five nuclear l
plants, including Maine Yankee, are prepared from split or homogenous media l cnd 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 Intralaboratory Results The Quality Assurance Program implemented at the analytical laboratory indicated good precision and accuracy !n reported values. Table 5.1 shows the results of accuracy and precision for laboratory analyses in 1986 for 12tralaboratory analyses and EPA interlaboratory cross-check analyses. For cecuracy, 66.4 and 88.5 percent of the results were within 5 and 10 percent of the known values, respectively, with 96.8 percent of all results falling cithin the laboratory critoria of 15 percent. For precision, 85.9 and 96.0 0451R
percent cf th) results wero eithin 5 cnd 10 percent of tho me:n. respectivoly, with 100 percent of all results meeting the laboratory criteria of 15 pec;ent.
The results of the EPA Interlaboratory Comparison Program, when considered apart from the remainder of the Quality Assurance program, were satisfactory in 1986. Two hundred and twenty-two analyses were performed on cir particulate filters, milk, and water. Of these 222 analyses. 15 were not included in the overall sumary of accuracy statistics due to what the Yankee Atomic Environmental laboratory considers questionable media. The analyses in question represent four sets of samples, all of which are considered
' questionable from the standpoint of EPA preparation and known-value calculation. These cases are documented in References 3 and 4. Based upyn the corrected sample analysis total (i.e.. 207), 206 analyses (i.e.,
99.5 percent) met the EPA's definition of mean value criteria. The single sample analysis that did not meet the criteria was a Ru-106 analysis in a water sample. A recount of the sample yielded a measurement that met the cbove criteria. (Details of this may be found in Reference 4.)
Blind Duplicate Program 4
! A total of 55 paired samples were submitted by the five participating
) plants for analysis during 1986. The data base used for the duplicate cnalysis consisted of paired measurements of 26 gamma-emitting nuclides. H-3, ir-89, Sr-90, low level I-131 and gross beta. A dual level criteria for l
careement was established. If the paired measurements fall within i 15 percent of their average value, then agreement between the measurements has l b:en met. If the value falls outside of the i 15 percent, then a two standard dsvlation range (95 percent confidence level) is established for each of the cnalyses. If the ranges overlap, agreement is obtained.
One thousand three hundred and sixty-four paired duplicate measurements were analyzed for 1986. A total of 99.1 percent of all measurements fell within the established criteria discussed above. The twelve measurements that did not meet the criteria were measurements of Zn-65 in milk, Mo-99 in milk, co-58 in milk. Mn-54 in seawater, Ce-141 in seawater. Ba-140 in seawater.
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Table 5.1 EPA Interlaboratory and Intralaboratory Results - 1986 Accuracy Total Number of Samples. O to 5% 0 to 10% 0 to 15%*
840 558 743 813 (64.4%) (88.5%) (96.8%)
Precision
-Total Number of Samples 0 to 5% 0 to 10% 0 to 15%*
815 700 782 815 (85.9%) (96.0%) (100%)
i o 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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Zr-95 in sac water, Sa-75 in mussal bodies, Co-57 in milk, Ru-103 in groundwater, Ba-140 in milk, and K-40 in Irish moss. In all but the last case, the rad'onuclide in question was not detected in the sample and a three standard deviation acceptance criteria was met. In the last case, the reason for the erroneous K-40 concentration was ascertained and the data was corrected. The twelve duplicate measurements represent 0.9 percent of all the blind duplicate paired measurements made during 1986. No trend was evident with respect to repeated failings of measurements for the above radionuclides.
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Trble 6.1 Maine Yankee 1986 Land Use Census Results Nearest Nearest Nearest "Residence Milk Animal Garden Sector (km) (km) (km)
.N 1.3 2.7 1.3 NNE 2.3 -- 2.5 NE 1.3 -- 1.3 ENE 0.9 7.1 1.2 E 0.9 -- 0.9 ESE 1.4 -- 1.5 SE 0.7 -- 3.2 SSE 0.9 -- 1.0 S 1.7 -- 2.7 SSW 3.0 -- 5.2 SW 1.4 7.9 3.8 WSW 1.0 -- 3.0 W 2.6 7.2 2.7 WNW 0.8 -- 2.8 NW 2.0 -- 2.0 NNW 1.1 -- 1.1 0451R
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7.0
SUMMARY
During 1986, Maine Yankee's environmental monitoring program detected trace levels of man-made radionuclides in the vicinity of the Maine Yankee plant. Most of this radioactivity resulted from nuclear weapons testing and the Chernobyl nuclear accident.
Plant operations may have contributed to the trace amounts of radioactive iodine, tritium, cobalt and cesium noted in several samples. However, we believe the cesium resulted predominately from nuclear weapons testing.
In all cases, the levels of radioactivity detected were less than one percent of federal limits and are judged to have no environmental or health impact.
8.0 REFERENCES
- 1. S. Farber, "Evaluation of Environmental Radioactivity Resulting from the Chernobyl Accident Measured by the Yankee Atomic Electric Company Environmental Laboratory," Yankee Atomic Electric Company, March 26, 1987.
- 2. USNRC IE Information Notice 86-32, "Request for Collection of Licensee Radioactivity Measurements Attributed to the Chernobyl Nuclear Plant Accident," dated May 2, 1986.
- 3. Yankee Environmental Radiation Measurement Laboratory Quarterly Status Report, April-June 1986, Yankee Atomic Electric Company.
- 4. Yankee Environmental Radiation Measurement Laboratory Quarterly Status Report, October-December 1986, Yankee Atomic Electric Company.
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