Text

Annual Radiological Environ Monitoring Rept,Jan-Dec 1987
	ML20151Y588
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Site:	Maine Yankee
Issue date:	12/31/1987
From:	; YANKEE ATOMIC ELECTRIC CO.
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MAINE YANKEE ATOMIC POWER COMPANY ANNUAL RADIOLOGICAL ENVIRONPINTAL MONITORING REPORT January - December 1987 April 1988 Prepared By:

Yankee Atomic Electric Company Environmental Engineering Department 1671 Worcester Road Framingham, Massachusetts 01701 8805050041 880429 PDR ADOCK 0"000309 R

DCD w

~

TABLE OF CONTE.rs Page LIST OF TABLES....................................................

111-LIST OF FIGURES...................................................

iv

1.0 INTRODUCTION

1

-2.0 ENVIRONMENTAL SURVEILLANCE PR0 GRAM................................

2 3.0

SUMMARY

OF 1987 ENVIRONMENTAL DATA................................

12 3.1 Air Particulate.............................................

14 3.2 Charcoal Filter.............................................

19 3.3 M11k........................................................

21 3.4 Mixed Vegetation............................................

26 3.5 Food Crop...................................................

29 3.6 Ground Water................................................

30 3.7 Estuary Water...............................................

33 3.8 Marine A1gae................................................

36 3.9 Sediment....................................................

39 3.10 Finfish.....................................

43 3.11 Mussels.....................................................

46 3.12 Crustaceans.................................................

49 3.13 Direct Radiation............................................

52 4.0 QUALITY ASSURANCE PR0 GRAM.........................................

62 5.0 LAND USE CENSUS...................................................

66 6.0

SUMMARY

68

7.0 REFERENCES

69,

I i

0451R/23.220

?

.e LIST OF TABLES Number Title Page 2.1 Radiological Environmental Surveillance Program.............

3 i

2.2 Radiological Environmental Surveillance Locations...........

4 3.1 Environinental Direc t Radiation Measurements - 1987..........

54 4.1 EPA Interlaboratory and Intralaboratory Results.............

64 5.1 1987 Land Use Census Results................................

67 1

4 I

)

-111-0451R/23.220

LIST OF FIGURES Number Title Page 2.1 Environmental Radiological Sampling Locations Within One Kilometer of Maine Yankee...............................

6 2.2 Environmental Radiological Sampling Locations Within 12 Kilometers of Maine Yankee...............................

7 2.3 Environmental Radiological Sampling Locations Outside 12 Kilometers of Maine Yankee...............................

8 2.4 Direct Radiation Monitoring Locations Within 1 Kilometer of Maine Yankee.............................................

9 2.5 Direct Radiation Monitoring Locations Within 12 Kilometers of Maine Yankee.............................................

10 2.6 Direct Radiation Monitoring Locations Outside 12 Kilometers of Maine Yankee.............................................

11 3.1 Gross-Beta Measurements of Air Particulate Filters..........

16 3.2 Cesium-137 in M11k..........................................

22 3.3 Strontium-90 in Mi1k........................................

23 3.4 Cesium-137 in Sediment......................................

40 3.5 Exposure Rate at Inner Ring TLDs, TL 01-06..................

55 3.6 Exposure Rate at Inner Ring TLDs TL 07-10, 12-13...........

56 3.7 Exposure Rate at Inner Ring TLDs, TL 14-19..................

57 3.8 Exposure Rate at Outer Ring TLDs, TL 11, 20-24..............

58 3.9 Exposure Rate at Outer Ring TLDs, TL 25-30..................

59 3.10 Exposure Rate at Outer Ring TLDs, TL 31-35..................

60 3.11 Exposure Rate at Control TLDs TL 36-38.....................

61

-iv-0451k/23.220

1.0 INTRODUCTION

The Radiological Environmental Surveillance 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 the station'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 1987, as in the past, the Environmental Studies Laboratory (ESL) staff collected all 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 Environmental Laboratory in Westborough Fbssachusetts f or f urther processing and radionuclide analysis.

This report is a summary of the findings of the Radiological Environmental Surveillance Program for 1987.

It is being provided in compliance with plant Technical Specification s.9.1.5. 0451R/23.220

2.0 ENVIRONMENTAL SURVEILIANCE 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 sampling locations are shown on maps in Figures 2.7 through 2.6. 0451R/23.220

Table 2.1 Maine Yankee Radiological Environmental Survel;1ance Program Media Sampling Frequency Kequired Analyses Weekly Gross-beta Air Particulsce (AP)

Quarterly Composite Gamma spectroscopy Weekly 1-131 Charcoal Filter (CF) tionthly Gamma spactroscopy, Milk (TM)

I-131 Food Crop (TF)*

- Annually (Harvest)

Gamma spectroscopy, I-131 Quarterly H-3, gamma Ground Water (WG)**

spectroscopy Estuary Water (WE)

- Monthly Composite Gamma spectroscopy

- Quarterly Composite H-3 Sediment (SE)

- Semiannually Canna spectroscopy Semiannually or in Gamma spectroscopy Fish and Invertebrates (FH, MU, CA, HA)

Season Direct Radiation (TL)

- Quarterly Integrated gamma dose Performed only if milk sampling is not done, Groundwater samples shall be taken when this source is tapped for drinking c*

or irrigation purposes in areas where hydraulic gredient or recharge properties are suitable for contamination. 0451R/23.220

Table 2.2 Maine Yankee Radiological Environmental Surveillance Locations Distance Station Code Zone ** or From Plant Direction (Media - Sta. No.)

Station Description TLD Ring ***

(km)

From Plant

AP/CF-11 Montsweag Brook 1

2.7 NW

AP/CF-13 Bailey Farm 1

0.5 NE

AP/CF-14 Mason Steam Station 1

4.8 NNE 7

AP/CF-16 Westport Firehouse 1

1.8 S

AP/CF-29 Dresden Substation 2

19.8 N

TM-16 Baker Farm 1

7.2 W

TM-17 Leeman Farm 1

7.9 SW

TM-25 Hanson Farm 2

16.0 W

TG-11 Bailey Farm 1

0.6 NE

WG-13 Bailey Farm 1

0.6 NE

WG-24 Morse Well 2

9.8 W

WE-12 Plant Outfall 1

0.3 SW

WE-20 Kennebec River 2

9.8 SW AL-11 Long Ledge 1

0.8 S

AL-01 Maine Dock 1

On-Site AL-02 Maine Discharge 1

On-Site AL-24 Sheepscot River 2

11.2 S

SE-16 Old Outfall Area 1

0.4 SW

SE-18 Foxbird Island 1

0.7 S

FH/MU/CA/HA-11 Long Ledge Area 1

1.1 S

MU/CA/HA-24 Sheepscot River 2

11.2 S

TL-1 Old Ferry Rd.

I 1.0 N

TL-2 Old Ferry Rd.

I 0.8 NNE

TL-3 Bailey House I

0.6 NE

TL-4 Westport Island. Rt. 144 I

1.2 ENE

TL-5 MY Information Center I

0.2 E

TL-6 Rt. 144 and Greenleaf Rd.

I 0.9 E

TL-7 Westport Island. Rt. 144 I

0.8 ESE

TL-8 MY Screenhouse I

0.2 SE

TL-9 Westport Island. Rt. 144 I

0.9 SE

TL-10 Bailey Point I

0.4 SSE

TL-11 Mason Steam Station 0

4.8 NNE

TL-12 Westport Firehouse I

1.8 S 0451R/23.220

Table 2.2 (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-13 Foxbird Island I

0.4 SSW

TL-14 Eaton Farm I

0.8 SW

TL-15 Eaton Farm I

0.8 WSW

TL-16 Eaton Farm I

0.7 W

TL-17 Eaton Farm Rd.

I 0.6 k%V

TL-18 Eaton Farm Rd.

I 0.8 NW

TL-19 Eaton Farm Rd.

I 0.9 hTJ

TL-20 Bradford Rd., Wiscasset 0

6.5 N

TL-21 Federal St., Wiscasset 0

7.2 NNE

TL-22 Cochran Rd., Edgecomb 0

8.3 NE

TL-23 Middle Rd., Edgecomb 0

7.0 ENE

TL-24 River Rd., Edgecomb 0

7.8 E

TL-25 River Rd., and Rt. 27 0

7.5 ESE

TL-26 Rt. 27 and Boothbey RR 0

7.8 SE Museum

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., Woa1wich 0

6.7 WSW

TL-32 Baker Farm. Woolwich 0

7.2 W

TL-33 Rt. 127. Woolwich 0

7.3 WhN

TL-34 Rt. 127, Woolwich 0

7.9 NW

TL-35 Rt. 127, Dresden 0

9.1 h3N

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

Listed in the Off-Site Dose Calculation Manual, Table 4.1.

- 2one 1 = Indicator Stations; Zone 2 = Control Stations.

C**I = Inner Ring; O = Outer Ring; C = Control.

. 045iR/23.220

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3.0

SUMMARY

OF 1987 ENVIRONMENTAL DATA The following pages summarize the analytical results of all the cnvironmental samples which were collected during 1987. 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 y:ar'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 radionuclide, and the number of measurements which exceeds ten times the yearly average b ckground value. The latter are classified as "non-routine" measurements.

The next column lists the Lower Limit of Detection (LLD) for those rcdionuclides which have detection capability requirements as specified in the plant Radiological Effluent Technical Specifications.

(Guidance is not given for many of the radionuclides routinely measured and reported herein.)

LLDs squal 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 conceivably be affected by tbe operation of Maine Yankee are called "indicator" 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 statjous, (2) the control stations, and (3) the station having the highest annual mean concentration.

For each of these three groups of data, ERMAP calculates:

The mean value of all concentrations including negative values and o

values below LLD.

o The standard error of the mean. 0451R/23.220

o The lowest and highest concentration.

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 standard deviation uncertainty. The quoted uncertainty term 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 Qkan the concentration exceeds three times its associated standard deviation.

With respect to the plots, all values less than three standard deviations (i.e., those where no activity was detected) were plotted as zero, c

s 0451R/23.220

3.1 Air Particulate Air monitoring stations are established at a total of five locations. Four of these locations are indicators, while the remaining one is a control station. The air pumps at these locations operate continuously at a flow rate of approximately 1.5 cubic feet per minute. Airborne particulates are collected by passing the air through a fiber filter. These filters are collected weekly and, following a radiological field check at the Maine Yankee Environmental Services Laboratory, are held for at least 100 hours0.00116 days 0.0278 hours 1.653439e-4 weeks 3.805e-5 months 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.

Naturally occurring K-40 and Be-7 were also detected in many samples. During May and June of 1986, as can be seen in Figure 3.1, gross-beta concentrations rose as a result of the deposition of fallout from the Chernobyl accident. This was noted throughout the northeastern U.S.

The following air particulate and charcoal filter sampling intervals were interrupted in 1987:

Between March 20 and March 27, the gas meter at AP/CF-16 a.

malfunctionel. The total volume of air sampled was estimated.

b.

Between April 24 and May 1, 4.42 hours4.861111e-4 days 0.0117 hours 6.944444e-5 weeks 1.5981e-5 months were lost at AP/CF-13 and 12.17 hours1.967593e-4 days 0.00472 hours 2.810847e-5 weeks 6.4685e-6 months at AP/CF-29, both due to a power outage.

Between May 29 and June 5, 3.1 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months were lost at AP/CF-13 c.

due to a power outage. 0451R/23.220

d.

On July 26, 2.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months were lost at AI/CF-13 due to a power outage.

Between December 11 and December 18. a carbon blade failure e.

on the pump at AP/CF-14 resulted in a low sample volume. The LLD in this case was not achieved in the case of the gross-beta on air particulate or I-131 on charcoal. 0451R/23.220

FIGURE 3.1 GROSS BETR MERSUREMENTS OF RIR PRRTICULATE FILTERS MRINE YR*4KEE ATOMIC POWER COMPANY, WISCASSET, ME o.co 0.55-

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O - AP-11, MONTSWERG BROOK Q

O - AP-13, BRILEY FRRM (ESL) 0.45-A - AP-14, MRSON STERM STRTION

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1986 1987

E)NIR0l#OTAL RAD 1100! CAL PROTAM Suf%RY MALE YAWEE ATOMIC KWER STATION WISCASSET. E J R ISY - DECO 9ER 1987

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RU-103 ( 20)

( -5.0t 44.2)E -6 29 ( 9.5 t 16.4)E -5

( 9.5 t 16.4)E -5

( 0)

(-3.5 -

3.4)E -4

(-3.4 -

4.3)E -4

(-3.4 -

4.3)E -4

(

0/ 16)*

( 0/ 4)*

( 0/ 4)*

RU-106 ( 20)

( -1.2t 2.7)E -4 14 ( 3.0 t 5.8)E -4

(-4.4 t 3.3)E -4

( 0)

(-2.0 -

1.6)E -3

(-1.3 -

1.4)E -3

(-l.3-

.1)E -3

(

0/ 16)*

( 0/ 4)*

( 0/ 4)*

SB-124 ( 20)

( -9.91 10.6)E -5 13 ( 2.8 t 1.7)E -4

( 1.8 t 1.9)E -4

( 0)

(-7.4 -

6.9)E -4

(-6.9 - 69.2)E -5

(-2.8-6.2)E -4

(

0/ 16)*

( 0/ 4)*

( 0/ 4)*

CS-134 ( 20)

.05

( -5.61 3.3)E-5 14 ( 3.7 t 9.1)E -5

(-1.8 t

.5)E -4

( 0)

(-2.3 -

3.0)E -4

(-9.2 - 30.3)E -5

(-3.0 -

.7)E -4

(

0/ 16)*

( 0/ 4)*

( 0/ 4)*

CS-137 ( 20)

.06

( -2.82 3.8)E -5 29 ( l.8 i

.6)E -4

( !.8 t

.6)E -4

( 0)

(-3.1 -

2.2)E-4

( !.0 -

3.5)E -4

( !.0 -

3.5)E -4

(

0/ 16)*

(

0/ 4)*

( 0/ 4)*

BA-140 ( 20)

( -2.lt 1.3)E -4 14

( l.1 t

.9)E -4

(-2.0 t 1.7!E -4

( 0)

(-1.6 -

.7)E -3

(-1.2 -

3.4)E -4

(-6.5 -

1.8)E -4

(

0/ 16)*

(

0/ 4)*

( 0/ 4)*

CE-141 ( 20)

(

!.5t

.4)E -4 11 ( 2.3 t

.9)E-4

( 5.2 t 7.8)E -5

( 0)

(-1.4 -

4.9)E-4

( 3.8 - 49.1)E-5

(-1.7 -

2.0)E -4

(

0/ 16)*

( 0/ 4)*

( 0/ 4)*

E-144 ( 20)

( -1.3t 1.9)E -4 14

( 3.0 1 27.5)E -5

( 2.2 t 454.5)E -6 1.3)E-3

(-5.4 -

6.3)E -4

(-1.1 -

1.1)E -3

( 0)

(-1.4

(

0/ 16)*

(

0/ 4)*

( 0/ 4)*

NDHCUTIE REFERS TO M IDEER OF SE? MATE EASLREEXTS nHIO{ IERE OREATER TW( TEN (10) TIES M AWRACE BAOSCUO FOR M PERIOD CF M EPORT.

M FRACTICN OF SAPFtE AM.YSES Y! ELD!IO KTECTAILE EASLFEENTS (1.E. >3 STD DEY!ATIONS) l$ !!O!CATED WITH *(

)*, -

3.2 Charcoal Filters Charcoal filter cartridges are situated in series with the air particulate fiber filters. Monitoring stations are located at a total of five stations, four of which are indicators and one of I

which is a control. The air pumps at these locations operate continuously at a flow rate of approximately one cubic foot per minute.

Charcoal filters from the five air sampling stations were collected and analyzed weekly for I-131 activity. No I-131 was detected.

Several sample intervals were interrupted during 1987 and are discussed in Section 3.1 Air Particulate. One LLD was not achieved due to a low sample volume. This too is discussed in Section 3.1.

LLDs were also not achieved on the five charcoal filter samples for the week June 5 to June 12.

When the samples were not received at the Yankee Environmental Laboratory, the Maine Yankee staff initiated a postal trace. The samples were then located, although the delay prevented the I-131 LLDs from being achieved. To prevent this situation from recurring.

Certified Mail is now used instead of Air Mail /Special Delivery. 0451R/23.220

DNIRONOTAL RADICLOGICA. FH0$AM Rit@RY 7%1E YMII ATOMIC FOG STATICN, WISCASET. E JWRY - KCDEER 1987 WITS: K!/0J. M EDILM CWRCON. FILTER ICICATOR STAT!0N3 STATICH WITH H!CEST H CONTRCL STATICN3 ummumum neumemunememte neemusemte RAD!(N.QlDES M

M M

G. MYKS) HIEn RAEE STA.

RANE RME (CIN-ROUTIE)'

LLD

10. ETECTEDet NO.

NO. ETECTED+e NO. K1ECTEDu l-131 (2M)

.07

( -1.82 1.0)E -3 13

(-3.8 t !!.9)E -4

(-1.5 i 1.5)E -3 1.4)E -!

(-2.1-2.6)E -2

(-6.1 -

1.8)E -2

( 0)

(-1.1

(

0/208)*

(

0/ 5218

(

0/ 52)*

NOPHtCUTIE REFERS TO TE M.MER CF SUffATE EASLFOOTS INICH IDE EATER Tie TEN (10) TIES TE AWRAGE BACx@ COO FM TE PERIOD CF TE REPmi.

- TE FRACTION OF SAPRI MYES Y! ELD!W ETECTABLE EARFBOTS (1.E. )3 STD KVIATIONS) IS !@!CATED WITH et 1*.

3.3 Milk Milk samples were collected and analyzed monthly for low level I-131 and gamma-emitting radionuclides. Following July 1, 1986, Sr-89 and Sr-90 analyses have not been required, but were done anyway on quarterly composites.

As in previous years, detectable concentrations of Cs-137 and Sr-90 were measured in milk samples submitted from the indicator and control locations.

(See Figures 3.2 and 3.3.)

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 primarily by the Peoples' Republic of China (the last test was in 1980). The relatively high levels of Cs-137 and Sr-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 f rom farm to farm. The input of additional Cs-137 into the milk pathway due to the Chernobyl accident in May of 1986 has raised levels somewhat in milk. 0451R/23.220

i FIGURE 3.2 CESIUM-137 IN MILK M91NE YRNKEE ATOMIC P0h'ER COMPRNY, HISCASSET, ME m-70-0 - TM-16, BAKER FARM o

o - TM-17, LEEMAN FORM A - TM-25, HANSON DAIRY co-a

=

h *~

r l

8 o

l d

x

'e$

40 -

b

(

Eag 30 -

p U

j E

n l %

\\h a

1

w V f g[

1

ww; us wr; sw ww; es xxrut wwrwe xxrsewaras wwrr 1980 1981 1982 1983 1984 1985 1986 1987

g g

~>

~

(J E

9 Me

=$

~

'd

~n m

E 2;:

+

M, 3

~ 0 m

8 o

LJ CD ru

~

(E I

'3 D

E*

m G O 8

b b z r hE 3%

~>

F c

A e

rEE 3

EEE

-g a

~

w. -.

y

?

BG5 "f

- ~

W s!E

=e 3w E

d,d,N, s

.g EEE S

o g

E 00<

7",35

-S

~

~_

3 g

h k

W98001DI / S31Mn000ld n

EWIRMENT4. RAD!CLOGICN. FROCFM StrWSY 1%!E YMIE ATWIC PCnER STATICN. WISCASSET. E

NRY - KCDEG 1987 EDIUM: MILK LNITS: K!/t0

! @ !CATOR STATICNS STATION WITH HIGEST MM CONTRCt. STATICNS te m m m e m H e H H H eH H eH HeH H eeH tHHeHtHHHe 1%D10NJCI.lES EM EM EM (NO. M YSES) REQUIRED P/#.E STA.

R#EE RAKE (N0lH0/ TIE)'

LLD N]. E TECTED H NO.

NO. ETECTED++

NO. DETECTEDee 2 -89 ( 12)

( -1.8t 5.9)E -l 16 ( 9.1 1 47.4)E -2

(-4.8 1 6.2)E -1

( 0)

(-3.5 -

2.0)E 0

(-8.2-12.6)E -1

(-1.6 -

1.1)E O et 0/ 8)e

(

0/ 4)e et 0/ 4)e E -90 ( 12)

(

l.!*

.1)E 1 16 ( l.2 t

.1)E 1

( 6.0 t

.3)E O

( 0)

( 7.2 - 15.6)E O

( !.0 -

1.4)E I

( 5.3 -

6.6)E 0

(

8/ Sie

(

4/ 4)e et 4/ 4)e K-40 ( 36)

(

l.2*

.0)E 3 25 ( l.5 t

.0)E 3

( l.5 t

.0)E 3

( 0)

( 9.4 - 14.7)E 2

( l.3 -

1.6)E 3

( l.3 -

1.6)E 3

( 24/ 24)*

e( 12/ 12)*

( 12/ 12)*

19t-54 ( 36)

( 2.9t 2.4)E -l 16 ( 4.0 t 3.5)E -1

(-4.5 t 1.9)E -1

( 0)

(-1.9 -

3.5)E O

(-1.9 -

2.1)E 0

(-1.5 -

.7)E O

(

0/24)*

(

0/ 12)e

(

0/ 12)*

CO-58 ( 36)

( -1.5t 2.0)E -1 17

( 3.2 1 2.2)E -1

(-1.9 t 2.5)E -1

( 0)

(-2.2 -

1.2)E 0

(-1.1 -

1.2)E 0

(-1.3 -

1.3)E O et 0/ 24)*

(

0/ 12)*

(

0/ 12)e FT-59 ( 36)

(

8.81 5.9)E -1 17 ( l.6 t

.9)E 0

(-8.0 t 5.3)E -1

( 0)

(-5.0 -

6.9)E 0

(-3.6 -

6.9)E 0

(-3.5 -

2.8)E 0

(

0/24)*

4( 0/ 12)e 6( 0/ 12)*

CD-M ( 36)

( -4.0t 2.8)E -1 25

(-1.3 t 39.7)E -2

(-1.3 t 39.7)E-2

( 0)

(-3.7 -

1.7)E 0

(-3.5 -

2.0)E O

(-3.5-2.0)E O et 0/ 24)*

(

0/ 12)e

(

0/12)*

IN-65 ( 36)

( -4.3t 6.0)E -1 25 ( 2.1 t 8.2)E -1

( 2.1

8.2)E -1

( 0)

(-6.6 -

3.9)E O

(-2.7 -

8.0)E 0

(-2.7 -

8.0)E O et 0/24)*

(

0/ 121e

(

0/ 12)*

ZA-95 ( 36)

( -7.7t 4.5)E -1 25

( 3.0 t 4.6)E -1

( 0)

(-5.4 -

3.8)E 0

(-2.4 -

2.4)E 0

(-2.4 -

2.4)E 0

(

0/ 2414

(

0/ 12)e

(

0/ 12)*

N]N-RCUT!E RETERS TO M NMER CF SEPARATE EASLFDOTS W10i UE @ EATER TIMN TEN (10) TIES M AGAT BAOIROLN) FCR M FER100 CF M REMRT.

H M FRACTICM OF $#ftE MYES Y!ELDlW3 DETECTARI EAMOGTS (1.E. >3 STD DEV! Ail 0NS) IS !@!CATED WITH et le. -

EWlR0100TAL Wl(LOGICAL PROMAM SUWRY 1%!E V46H ATORIC P90 STATION. WISCASSET, E JANY - [ECDGER 1987 ED!tMt MILX (811TS PCl/KG 1 21CATOR STATIGt3 STATION WITH HIGEST EM C0ffic. STATICNS mmHm+mm

++++++++mmm*+e mH e++++ m e m m e M10MKLl!ES EM EM EM (NO. MLYSES) EQVilED fWOE STA.

1%MDE IWdOE (N0lH0JTIEl' LLD

10. DETECTEDH NO.

NO. DETECTEDH NO. DETECTEDH p 103 ( 36)

( -10.0t 3.0)E -1 16

(-7.5 t 4.4)E -1

(-9.C i 3.9)E -1

( 0)

(-4.3 -

1.6)E 0

(-4.3 -

1.6)E 0

(-3.0 -

1.2)E 0

(

0/ 24)*

(

0/ 12)e et 0/ 12)e RLF-106 ( 36)

(

-2.0*

2.6)E 0 25

( l.9 t 2.5)E 0

( 0)

(-3.6 -

3.0)E 1

(-1.2 -

1.5)E 1

(-1.2 -

1.5)E 1

(

0/24)*

(

0/ 121e

(

0/ 12)*

SB-124 ( 36)

(

!.6t 5.8)E-1 25

( 7.4 i 8.0)E -1

( 7.4

8.0)E-1

( 0)

(-4.4 -

6.6)E 0

(-2.9 -

7.2)E 0

(-2.9 -

7.2)E 0

(

0/24)e

(

0/12)e et 0/ 12)*

l-131 ( 36) 1.0

( -6.31 12.5)E -3 16

(-1.2 i 19.3)E-3

(-4.0 t 1.6)E -2

( 0)

(-l.3 -

1.3)E-1

(-1.3 -

1.3)E -1

(-l.4 -

.6)E -l

(

0/2414 et 0/12)*

et 0/12)*

CS-134 ( 36) 15.

(

l.62

.5)E 0 16

( 2.4

.7)E 0

( !.4 i

.4)E 0

( 0)

(-2.0 -

7.2)E 0

(-1.0 -

7.2)E 0

(-2.6 - 34.0)E -l

(

6/24)*

(

4/12)e et 5/ 121e CS-137 ( 36) 18.

(

2.lt

.3)E 1 17

( 2.3 t

.5)E i

( l.1 i

.1)E I

( 0)

( 8.4 - 67.2)E 0

( 9.8 - 67.2)E 0

( 6.1 - 20.6)E 0 e( 24/ 24)#

et12/12)*

et 12/ 12)e BA-140 ( 36) 15.

( -5.lt 5.8)E -1 16 ( 3.0 t 8.1)E-1

(-3.4 1 4.3)E -1

( 0)

(-8.7 -

7.3)E 0

(-3.3 -

7.3)E O

(-2.2 -

2.5)E O 4( 0/ 24)e et 0/ 12)e et 0/ 12)e E-141 ( 36)

(

2.72 5.9)E -1 17 ( 7.6 t 6.0)E -1

( 2.5 t 4.2)E -1

( 0)

(-9.0 -

5.4)E 0

(-2.6 -

4.8)E 0

(-2.6 -

3.0)E O et 0/24)*

(

0/12)#

et 0/ 12)e E-144 ( 36)

( -1.2t 2.1)E 0 25 ( l.8

1.3)E 0

( l.8 t 1.3)E 0

( 0)

(-2.5 -

1.8)E I

(-7.4 -

7.8)E 0 1-7.4 -

7.8)E O l

et 0/24)e

(

0/12)e et 0/12)e e IDH01 TIE EFERS TO M IU9ER CF SEPWTE EASLfE)DTS nei!Of lOE GEATER T)#N TEN (10) TIES M #.UAT BACKm0LIC FOR M F9100 0F M REPORT.

H M HWCTI(N CF SAIRE MLYSES Y! ELD!IC DETECTABLE EASLPE!OTS (l.E. >3 STD DEVIATICNS) IS !E!CATED WITH *(

)*. l i

3.4 Mixed Vegetation Though not required by plant Technical Specifications, mixed vegetation samples were collected in June and September from TG-11.

The vegetation consisted of various types of grasses and were analyzed for gamma emitting radionuclides. Only naturally occurring Be-7 and K-40 were detected in the samples.

f l

l 1 0451R/23.220

EWIP010fNT4. RAD 10 LOO 10AL PROCRM RMMY l#!E YAfDIE ATOMIC POER STAi!0N. WISCASET. E JAPd.lARY - KCDfER 1997 EDILM1 M!IED WTTAil0N LNITS PCl/KO ET IE!CATOR STAf!CNS STATICH W11H HI@EST M CENTROL $iAil(NS

++ m m e m ++ m e

++ m e m m m m m e m

+mmmmm MD!018.[1.lES M

M M

(40. AleLYSES) M IRED IWEE STA.

RME RANT (IDFROL'TIEl' LLD NO. DETECTED **

NO.

NO. DETECTED ++

NO. ETECTEDet K-7

( 2)

(

!.2t

.5)E 3 11

( !.2 1

.5)E 3 NO MTA

( 0)

( 6.7 - 17.4)E 2

(

2/ 2)e

( 2/ 2)*

K-40 ( 2)

(

5.0t 1.7)E 3 11

( 5.0 t 1.7)E 3 NO DATA 6.7)E 3

( 3.4 -

6.7)E 3

( 0)

( 3. 4 e( 2/ 2)*

(

2/ 2)*

19F54 ( 2)

(

6.!t 2.2)E 0 11

( 6.1 &

2.2)E 0 NO DATA

( 0)

( 3.9 -

8.3)E 0

( 3.9 -

8.3)E 0

( 0/ 2)*

(

0/ 2)#

CD-58 ( 2)

( 7.8k 2.5)E O 11

( 7.8 t 2.5)E 0 2 DATA

( 0)

( 5.3 - 10.3)E 0

( 5.3 - 10.3)E O

(

0/ 2)*

(

0/ 2)e FE-59 ( 2)

(

-2.5*

3.8)E 0 11

(-2.5 t 3.8)E 0 NO DATA

( 0)

(-4.3 -

1.4)E 0

(-6.3 -

1.4)E 0

( 0/ 2)*

(

0/ 216 CD-60 ( 2)

( -4.41

.4)E O 11

(-4.4 *

.4)E O NODATA

( 0)

(-4.8 -

-3.9)E 0

(-4.8 -

-3.9)E 0

( 0/ 2)*

( 0/ 2)*

IN-65 ( 2)

(

!.4t

.9)E 1 11

( l.4 t

.9)E I NO DATA

( 0)

( 5.3 - 23.0)E 0

(

0/ 2)e

(

0/ 2)*

IR-95 ( 2)

( -5.92 20.4)E 0 11

(-5.9 t 20.4)E 0 10 DATA

( 0)

(-2.6 -

1.5)E I

(-2.6 -

1.5)E 1

(

0/ 2)e

( 0/ 2)*

AG-110MI 2)

(

4.11 15.5)E -1 11

( 4.1 i 15.5)E -1 10 MTA

( 0)

(-1.1 -

2.0)E O

(-1.1 -

2.0)E 0 et of 2)e et 0/ 2)e l

e NDHOUTIE LEERS TO M IOEER OF SENAATE EA9.RE)CI15 lNIDI ERE 0 EATER T)#M TEN (10) TIES M AWRAT BAOI8RND FCR M PERIOD OF M ENRT.

- M Fl%CTION OF S#FLI AfdLYES YlELDINO DETECTABLE EA9.REES (1.E. >3 STD DEVIAi!0p6) !$ IE !CATED WITH e(

le.

EhYIR0lfENTAL RADIOLOGICAL PR00MM SlfftARY MAIE YANKEE ATOMIC POER STATION, WISCASET, E JANUMY - ECD 9ER 1987 ED!lM: MIXED VEETATION LNITS8 PCI/KG ET i

ih0!CATCR STAT!WfS STATION WITH HIGEST W CONTROL STATIONS toutemm*+me

::.....:mmmm ememmmu RADIONJCI.lDES EAN M

EAN (NO.' ANALYSES) REQUIRED RANT STA.

RANE RANCE (IDHIOUTIE)'

LLD NO. DETECTED ++

NO.

NO. DETECTED **

NO. DETECTEDH R)-103 ( 2)

( 8.8i 6.2)E O 11

( 8.8 i 6.2)E O E DATA

( 0)

( 2.7 - 15.0)E O

( 0/ 2)*

( 0/ 2)*

RU-106 ( 2)

( -3.21 1.4)E 1 11

(-3.2 t 1.4)E 1 NO DATA

( 0)

(-4.6 -

-1.8)E 1

(-4.6 -

-1.8)E 1

( 0/ 2)*

( 0/ 2)*

$8-124 ( 2)

(

4.7i 6.9)E O 11

( 4.7 t 6.9)E O NO DATA

( 0)

(-2.2 - !!.6)E O

(-2,2 - 11.6)E O

( 0/ 2)*

( 0/ 2)*

l-131 ( 2)

(

l.81

.4)E I 11

( l.8 i

.4)E 1 NO DATA

( 0)

( l.3 -

2.2)E 1

( l.3 -

2.2)E 1

( 0/ 2)*

( 0/ 2)*

CS-134 ( 2)

( -0.9t 2.8)E O 11

(-8.9 i 2.8)E O NO DATA

( 0)

(-1.2 -

.6)E i

(-1.2 -

.6)E 1

( 0/ 2)*

( 0/ 2)*

CS-137 ( 2)

(

2.31 1.0)E O 11

( 2.3 i 1.0)E 0 NO DATA

( 0)

( l.3 -

3.3)E O

( l.3 -

3.3)E O

( 0/ 2)*

(

0/ 2)*

3.5 t 10.4)E O NO DATA BA-140 ( 2)

(

-3.5*

10.4)E 0 11

( 0)

(-1.4 -

.7)E 1

-l.4 -

.7)E 1

( 0/ 2)*

( 0/ 2)*

l l

E-141 ( 2)

(

-6.5* 106.5)E -1 11

(-6.5 t 106.5)E -1 NO DATA

( 0)

(-1.1 -

1.0)E 1

(-1.1 -

1.0)E I f

( 0/ 2)*

( 0/ 2)*

E-144 ( 2)

(

l.9t 2.8)E 1 11

( l.9 i 2.8)E 1 NO DATA I 0)

(-8.4 - 47.3)E O

(-8.4 - 47.3)E 0

( 0/ 2)*

( 0/ 2)*

NGH0JTIE FOERS TO M M.NEER OF SEPMATE EASURDENTS INICH ERE CREATER THM TEN (10) TIES TE A'KRAE BACKCR01.ND FCR M FERIOD CF M FEKRT.

- TE /RACTION OF $#FLE AM.YSES YlELDING ETECTABLE EA9JREENTS tl.E. >3 STD DEVIATIONS) IS INDICATED WITH *(

)*..

wh dPU,

3.5 Food Crop Pursuant to Technical Specification Table 4.8-1, food crop sampling is not required, provided that milk sampling is being performed. Since milk sampling was performed in 1987, no food crop samples were collected.

i i

l 0451R/23.220

3.6 Ground Water Ground water grab samples were collected from one indicator and one control station on a quarterly, basis, although not required by plant Technical Specifications. These samples were. analyzed for H-3 and ganna emitting radionuclides. Tne results show that there were no radionuclides detected _in ground water samples during 1987.

F k

P l

l

0451R/23.220 1

DNIROPfENTAL RADIOLOGICAL FROGRAM Slff%RY MIE YAEEE ATOMIC PCER STATICH, WISCASSET. E JANUARY - DE&MBER 1987 EDILM: 0R01.ND WATER LNITS: PCl/KG INDICATOR STATIONS STATION WITH H10EST M CONTROL STATIONS H+MH+4HMH4H H M H+ H +44 H44 M H4 Hi*

MHHtHHH+H RADIONJCLIDES M

M M

(NO. AMLYSES) EQUIRED RANCE STA.

RANCE RANCE (NON-ROUTIE)'

LLD NO. DETECTEDH NO.

NO. DETECTED **

K-4

( 8)

( -2.3t 10,5)E O 24 ( 4.7 t 2.1)E O

( 4.7 t 2.1)E O

( 0)

(-2.9 -

~1.7)E 1

(-2.4 - 99.0)E -1

(

0/ 4)*

( 0/ 4)*

( 0/ 4)*

C-54 ( 8)

( -6.21 4.0)E -1 24

(-2.3 t 34.2)E -2

(-2.3 i 34.2)E -2

( 0)

(-1.5 -

.3)E 0

(-1.0 -

.4)E o O t.0 -

.4)E O

( 0/ 4)*

( 0/ 4)*

( 0/ 4)*

CO-58 ( 8)

( -6.9t 3.2)E -1 24

(-5.7 t 2.5)E -1

( 0)

(-1,6 -

.2)E O

(-1.0 -

.1)E 0

(-1.0 -

.1)E O

(

0/ 4)*

( 0/ 4)*

( 0/ 4)*

FE-59 ( 8)

(

2.7t 17.4)E -1 13 ( 2.7 f 17.4)E -)

(-6.7 t 10.4)E -1

( 0)

(-3.3 -

4.7)E O

(-3.3 -

4.7)E 0

(-3.7 -

.9)E O

( 0/ 4)*

( 0/ 4)*

( 0/ 4)*

CO-60 ( 8)

(

6.3t 5.1)E -1 13 ( 6.3 i 5.1)E -1

(-?.3 t 2.9)E -1

( 0)

(-6.2 - 18.5)E -1

(-1.1 -

.3)E O

(

0/ 4)*

( 0/ 4)*

( 0/ 4)*

IM-65 ( 8)

(

1.0i

.8)E O 13 ( 1.0 t

.8)E 0

(-8,5 t 13.2)E -1 3.0)E O

(-1.1 -

3.0)E O

(-3.2 -

2.8)E 0

( O

(-1.1

( 0/ 4)*

( 0/ 4)*

( 0/ 4)*

ZR-95 ( 8)

(

8.3t 8.5)E -1 13 ( 8.3 t 8.5)E -1

(-5.9 t 6.2)E -1 33.1)E -1

(-3.4 - 33.1)E -1

(-2.3 -

.6)E O

( 0)

(-3,4

(

0/ 4)*

( 0/ 4)*

( 0/ 4)*

AG-110M( 8)

( -6.3i 52.8)E -2 24

( 2.1 f 6.9)E -1

( 2.1 t 6.9)E -1

.8)E O

(-1.4 -

1.0)E O

(-1.4 -

1.8)E O

( 0)

(-1.4

(

0/ 4)*

( 0/ 4)*

( 0/ 4)*

RU-103 ( 8)

( -10.0t 5.3)E -1 13

(* **

5.3)E-1

(-1.7 i

.4)E O

( 0)

(-1.8 -

.4)E O

(-1.8 -

.4)E 0

(-2.5 -

.8)E O I

(

0/ 4)*

( 0/ 4)*

( O' 4)*

l l

NON-ROUTIE REFERS TO TE M.MBER 0F SEPAoATE EARRSf3TS INICH ERE CREATER T)MN TEN (10) TIES TE AMCE BACKCRO.ND FOR TE PERIOD E TE REFORT.

TE FRACTION OF SAPPLE ANN.YSES Y!ELDING DETECTAR.E EASLRDENTS (1.E. >3 STD [EVIATIONS) IS INDICATED WITH *(

)*,.

ENVIROMOUAL RADIOLOGICAL PROGRAM SVRIARY HAIE YAWIE ATOMIC P(AER STATION WISCASET. E JAM.lARY - DECD(BER 1987 EDILM: OROLN) IMTER LNITS: PCI/KO INDICATOR STATIONS STATION WITH HIGEST EAN CONTROL STATIONS nunnmmem momenenenmenne m***u nt un RADIONUC1.!IES S

EAN G

(NO. M YSES) REQUIED RANCE STA. RANCE RANGE (NON-ROUTIEl' LLD NO. DETECTEDn NO.

NO. DETECTED **

RU-106 ( 8)

( -5.6f 7.9)E O 13

(-5.6 i 7.9)E O

(-7.2 i 1.2)E O

( 0)

(-2.3 -

1.6)E 1

(-2.3 -

1.6)E I

(-1.0 -

.5)E 1

( 0/ 4)*

( 0/ 4)*

( 0/ 4)*

S8-124 ( 8)

(

-1.2*

1.4)E 0 24

(-5.2 t 13.6)E -1

(-5.2 i 13.6)E -!

( 0)

(-5.0 -

1.6)E O

(-4.4 -

1.7)E O

(-4.4 -

1.7)E 0

( 0/ 4)*

( 0/ 4)*

( 0/ 4)*

I-131 ( 8)

(

l.3t 2.0)E O 13 ( !.3 t 2.0)E O

( 9.8 i 5.5)E -1

( 0)

(-2.1 -

7.1)E O

(-2.1 -

7.1)E O

(-7.2 - 2230.0)E -3

( 0/ 4)*

( 0/ 4)*

(

0/ 4)*

CS-134 ( 8)

( -1.3t 6.5)E -1 13

(-1.3 i 6.5)E -1

(-8.6 i 5.4)E -1

( 0)

(-l.6 -

1.2)E O

(-1.6 -

1.2)E O

(-1.8 -

.3)F 0

(

0/ 4)*

( 0/ 4)*

( 0/ 4)*

CS-137 ( 8)

( -8,5t 6.1)F -1 24

(-6.1 5.9)E -1

(-6,1 i 5.9)E -1

( 0)

(-2.5 -

.4)E O

(-1.7 -

.9)E O

(-1.7 -

.9)E O

( 0/ 4)*

( 0/ 4)*

4 0/ 4)*

BA-140 ( 8)

( -1.2t 1.3)E O 24

( 3.7 t 15.9)E -1

( 3.7 s 15.9)E -1

( 0)

(-4.0 -

1.0)E O

(-3.3 -

4.3)E O

(-3.3 -

4.3)E O

(

0/ 4)*

(

0/ 4)*

( 0/ 4)*

&-141 ( 8)

(

6.!*

10.3)E -1 13 ( 6.1 x 10.3)E-1

( 4.9 i 10.0)E -1

( 0)

(-2.4 -

2.4)E O

(-2.3 -

2.4)E 0

(-1,6 -

3.2)E O

(

0/ 4)*

(

0/ 4)*

( 0/ 4)*

E-144 ( 8)

(

4.5*

5.7)E O 24 ( 3.3 t 4.5)E O

( 3.3

4.5)E O

( 0)

(-2.1 -

.5)E 1

(-8.8 -

12.4)E O

(-8.8 - 12.4)E O

( 0/ 4)*

(

0/ 4)*

( 0/ 4)*

H-3

( 8)

(

-1.7*

1.0)E 2 24

(-4.5 t 13.1)E 1

( 0)

(-3.3 -

1.2)E 2

(-3.7 -

2.3)E 2

(-3.7 -

2.3)E 2 l

( 0/ 4)*

(

0/ 4)*

( 0/ 4)*

1 l

l NCN-ROUTIE REFERS TO TIE NLMBER CF SEPARATE EASLREENTS lei!W 66E @ EATER DAN TEH (10) TIES TE AGCE BACXCROLND FOR TE PERIOD OF TK EPORT.

n TE FRACTION CF SMPLE MYSES YIELDING DETECTABLE EASLREENTS (f.E. >3 STD DEVIATIONS) IS INDICATED WITH *(

)*.

l 1 l.

3.7 Estuary Water Estuary water.is analyzed monthly for gamma emitting radionuclides and quarterly for H-3.

The one indicator station has a composite sampler from which samples are collected on a weekly basis.

Weekly grab samples are taken from the control location. All of the weekly samples are composited at the laboratory and analyzed monthly. All monthly samples are composited at the Yankee

. Environmental Laboratory for quarterly H-3 analyses.

H-3 was detected at Station 12 (plant outfall) the second quarter composite sample at 970 ! 220 pCi/kg.

In the May 1987 composite, Cs-137 (3.17 2 0.64 pCi/kg), Co-58 (9.61 ! 0.80 pCi/kg), Co-60 (4.10 2 0.93 pCi/kg), and Sb-124 (10.8 ! 2.1 pCi/kg) were detected at the same location. 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 through the diffusers in the Back River, the concentrations would be reduced by approxinately a f actor of ten.

All of the above values are well below the reporting levels cited in Technical Specification Table

-4.8-3.

l l 0451R/23.220

DNIHONENTAL RADIOLOGICfL PR0mAM Stit1ARY MIE YMEE ATOMIC POER STATION, WISCASET E JANUARY - DECO GER 1987 EDilM: ESTUARY WATER WITS! PCl/KG IM)lCATCR STATIONS STATION WITH HICEST EAN CONTROL STATIONS l

l m ::. : :. ::::*

ummmmmmeme ummenmu MD10NUC1.10ES EAN EAN EAN (NO. ANALYSES) REQVIRED RANGE STA.

RME RANCE (NON-ROUTIE)'

LLD NO. DETECTED **

NO.

NO. CETECTEDH NO. DETECTEDH K-40 ( 24)

( 2.21

.2)E 2 12 ( 2.2 i

.2)E 2

( 4.9 t 1.7)E I

( 0)

( 4.7 - 28.5)E 1

(-1.2 - 2220.0)E -1

( 12/ 12)*

( 12/ 12)*

(

5/ 12)*

IW-54 ( 24) 15.

( -3.31 2.5)E -1 20

(-6.0 t 28.1)E -2

( 0)

(-2.3 -

.7)E O

(-2,3 -

1.1)E O

(-2.3 -

1.1)E O l

(

0/ 12)*

(

0/ 12)*

(

0/ 12)*

CO-58 ( 24) 15.

(

1.0t

.8)E O 12 ( !.0 t

.8)E O

(-3.5 t 2.7)E -1 96,1)E -1

(-9.1 - 96.1)E -1

(-2.1 -

1.0)E O I

( !)

(-9.1

(

1/ 12)*

(

1/ 12)*

(

0/ 12)*

i l

l FE-59 ( 24) 30.

(

4.9f 7.3)E -1 12 ( 4.9 i 7.3)E -1

( 4.4 i 5.1)E -1

( 0)

(-2.8 -

6.0)E 0

(-2.8 -

6.0)E O

(-1.6 -

4.4)E 0 l

(

0/ 12)*

(

0/ 12)*

(

0/ 12)*

CD-60 ( 24) 15.

(

4.3*

4.5)E -1 12 ( 4.3 i 4.5)E -1

(-7.2 i 2.6)E -1

( !)

(-2.0 -

4.1)E 0

(-2.0 -

4.1)E O

(-2,2 -

.9)E 0

(

1/ 12)*

(

1/ 12)*

(

0/ 12)*

ZN-65 ( 24) 30.

(

3.0f 5.0)E -1 12 ( 3.0 t 5.0)E -1

( !.3 i 5.1)E -1

( 0)

(-4.2 -

2.3)E O

(-4.2 -

2.3)E O

(-3.3 -

2.7)E O

(

0/ 12)*

(

0/ 12)*

(

0/ 12)*

ZR-95 ( 24) 15.

(

3.5f 2.8)E -1 20 ( 4.7 i 4.2)E -1

( 4.7 i 4.2)E -1

( 0)

(-1.0 -

1.6)E 0

(-3.1 -

2.6)E O

(-3.1 -

2.6)E O

(

0/ 12)*

f 0/ 12)*

(

0/ 12)*

A0-110M( 24)

( 2.6f 2.4)E -1 12 ( 2.6 i 2.4)E -1

( 2.4 t 2.7)E -1

( 0)

(-1.6 -

1.7)E 0

(-1.6 -

1.7)E 0

(-1.3 -

1.9)E O

(

0/ 12)*

(

0/ 12)*

(

0/ 12)*

RU-103 ( 24)

( -1.0f

.3)E 0 20

(-4.1 &

2.9)E -1

(-4.1 i 2.9)E -1

( 0)

(-2.7 -

.4)E O

(-1.8 -

1.5)E O

(-1.8 -

1.5)E O

(

0/ 12)*

(

0/ 12)*

(

0/ 12)*

NON-f0UTIE REFERS TO TE IUEER OF SEPARATE EASTEENTS 661104 ERE WEATER TMN TEN (10) TIES M AWRAE BACXmCLMD Fm TE FERIOD OF M REPORT.

H TE FRACTION OF SMLE AMLYSES YlElDING MTECTABLE EASUREENTS (1.E. >3 STD E VIAT10% ) IS INDICATED WITli *(

)*..

E)N!ROMOTAL RADIOLOGICAL PRO @AM SLNWRY MAIE YAM (EE ATOMIC POER STATION. WISCASSET E JANJARY - DECEMBER 1987 EDIUM: ESTUARY WATER WITS: PCl/KG IM)lCATOR STATIONS STHION WITH HIGEST M C0KfRG. STATIONS

. ":. ::. : ::e enn*+wn*****unut u w e n e n w ++++

RADIONJCLIDES EAN M

M (NO. AMLYSES) REQUIRED RANGE STA.

RANGE RANGE (NON-RGJTINE)'

LLD NO. DETECTEDu NO.

NO. DETECTED **

PC. DETECTED **

RJ-106 ( 24)

( -2.7f 24.5)E -1 12

(-2.7 i 24.5)E -1

(-1.2 t 2.0)E O

( 0)

(-1.5 -

1.5)E 1

(-1.5 -

1.5)E 1

(-10. - !!.2)E O

(

0/ 12)*

(

0/ 12)*

(

0/ 12)*

S8-124 ( 24)

(

8.51 12.5)E -1 12 ( 8.5 i 12.5)E -1

(-1.9 i 9.5)E -1

( 0)

(-8.0 - 10.8)E O

(-8.0 -

10.8)E O

(-5.7 -

4.3)E O

(

1/ 12)*

(

1/ 12)*

(

0/ 12)*

I-131 ( 24) 15.

(

4.6i 7.4)E -1 20 ( l.5 i

.7)E O

( 1.5 t

.7)E O

( 0)

(-2.5 -

7.4)E O

(-1.6 -

5.9)E O

(-1.6 -

5.9)E O

(

0/ 12)*

(

0/ 12)*

(

0/ 12)*

CS-134 ( 24) 15.

( -4.2t 2.4)E -1 12

(-4.2 i 2.4)E -1

(-9.0 t 1.7)E -1

( 0)

(-1.9 -

.8)E O

(-1.9 -

.8)E O

(-2.2 -

.1)E O

(

0/ 12)*

(

0/ 12)*

(

0/ 12)*

CS-137 ( 24) 18.

(

5.5*

3.1)E -1 12

( 5.5 t 3.1)E-1

(-1.9 i 2.0)E -1

( 1)

(-7.0 - 31.7)E -1

(-1.5 -

.9)E O

(

1/ 12)*

(

1/ 12)*

(

0/ 12)*

BA-140 ( 24) 15.

(

3.9t 4.5)E -1 12

( 3.9 t 4.5)E -1

( 6.5 t 49.3)E -2

( 0)

(-2.9 -

3.5)E 0

(-2.9 -

3.5)E O

(-1.7 -

3.4)E O

(

0/ 12)*

(

0/ 12)*

(

0/ 12)*

CE-141 ( 24)

( 3.8t 5.1)E -1 12

( 3.8 t 5.1)E -1

( 6.3 i 56.9)E -2

( 0)

(-2.6 -

3.6)E 0

(-2.6 -

3.6)E O

(-4.4 -

2.1)E O

(

0/ 12)*

(

0/ 12)*

(

0/ 12)*

CE-144 ( 24)

(

-2.7*

1.6)E O 20 ( 5.1 i 15.6)E -1

( 5.1 t 15.6)E -1

( 0)

(-1.1 -

.9)E 1

(-1.1 -

.8)E 1

(-1.1 -

.8)E 1

(

0/ 12)*

(

0/ 12)*

(

0/ 12)*

H-3

( 8) 3000.

( 2.St 3.0)E 2 12 ( 2.5 t 3.0)E 2

(-9.0 i 10.4)E I

( 1)

(-4.3 -

9.7)E 2

(-4.3 -

9.7)E 2

(-3.9 -

1.0)E 2

(

1/ 4)*

(

1/ 4)*

(

0/ 4)*

1 1

NON-ROUTINE REFERS TO TE N.MBER 7 SEPAPATE EASUDENTS IM!m IERE mEATER TIM TEN (10) TIES TE AYERAGE BACX@0JND FM TE PERIOD CF TE REFORT.

H TE FRACTION CF S#Fli IM.YSES YlELDING CETECTABE EA9JREES (I.E. >3 STD CEVIATICNS) IS INDICATED WITH *(

)*.

l 3.8 Marine Algae Although not required by plant Technical Specifications, samples of mixed fucus and ascophyllum marine algae were collected from two locations during June and September. Each sample was analyzed for gamma emitting radionuclides. Two additional special samples were collected in the plant vicinity during July.

Cesium-137, Ag-110m, Co-58, and Co-60 were 'otected in the June 29 sample at AL-11 in the immediate vicinity of the plant discharge.

Two nearby folicw-up samples collected on July 16 showed the same radionuclides, except Cs-137, at similar low levels. The same held true for the September 29 sample at AL-11.

These levels may be attributed to controlled plant discharges. Marine algae is not consumed in any way from this area, however, so there would be no impact on man. Although there are no reporting levels for marine algae, each of the detected levels is well below Technical Specificatioi reporting levels for edible fish and invertebrates.

l l

l l l 0451R/23.220

a ENVIROWENTAL RADIOLOGICAL PR0mAM MARY MAIE YNtIE ATOMIC POER STATION, WISCASSET E JAM.lARY - DECEMBER 1987 LMITSr PCl/KG E T EDIUM: MARIE ALGAE INDICATOR STATICH3 STATION WITH H10EST EAN CONTROL STATIONS nmmu**mm m m e m **+++ m m *+++

m ++:::.::.:.:

RADIONVQ. IDES EAN EAN EAN (NO. ANALYSES)

REQUIRED R#10E STA.

RANGE RANGE (N0HOUTIEF LLD NO. DETECTEI)++

NO.

NO DETECTEDH NO. DE1ECTED**

BE-7 ( 7)

( 2.2t 1.0)E 2 01

( 4.7 *

.3)E 2

( 6.7 t 1.3)E 1

( 0)

( l.4 - 47.1)E 1

( 4.4 -

8.8)E I

( 3/ 4)*

(

1/ 1)*

( 2/ 3)*

K-40 ( 7)

(

6.4t

.8)E 3 01

( 8.6 t

.1)E 3

( 5.2 t 1.4)E 3 8.6)E 3

( 2.5 -

6.8)E 3 l

( 0)

( 5.1

(

4/ 4)*

(

1/ 1)*

( 3/ 3)*

l9f-54 ( 7)

-(

3.4t 2.0)E O 01

( 7.4 t 2.7)E O

(-1.1 *

.9)E 0

( 1)

(-4.4 - 73.9)E -1

(-2.8 -

.4)E 0

( 0/ 4)*

(

0/ 1)*

( 0/ 3)*

(D-56 ( 7)

(

2.9t

.8)E 1 02 ( 4.8 i

.3)E 1

( l.5 t 1.5)E O

( 4)

( 8.6 - 48.2)E O

(-1.6 - 43.9)E -l

(

4/ 4)*

(

1/ 1)*

( 0/ 3)*

FE-59 ( 7)

( -4.0t 47.6)E -1 02 ( 4.6 i 5.7)E 0

( 2.4 t 2.4)E O

( 0)

(-1.2 -

1.0)E I

(-2.4 - 71.5)E -l

(

0/ 4)*

(

0/ 1)*

(

0/ 3)*

CD-60 ( 7)

(

4.0t 1.2)E 1 02 ( 6.2 *

.4)E 1

( l.1 i

.8)E O

( 4)

( l.3 -

6.2)E 1

(-4.7 - 23.8)E -l

(

4/ 4)*

(

1/ 1)*

(

0/ 3)*

IN-65 ( 7)

(

3.7t

.5)E 0 11

( 4.3 t

.5)E O

( 4.5 t 28.3)E -1 l

( 0)

( 2.4 -

4.8)E O

( 3.8 -

4.8)E O

( 4.1 -

5.4)E 0

(

0/ 4)*

( 0/ 2)*

( 0/ 3)*

2R-C5 ( 7)

( 2.2t 3.5)E O 02 ( 7.6 t 4.5)E 0

(-1.1 t 1.8)E 0

( 0)

(-7.2 -

7.7)E O

(-4.0 -

2.1)E 0

( 0/ 4)*

( 0/ 1)*

( 0/ 3)*

AG-110M( 7)

( 2.2t

.3)E 1 02 ( 2.3 i

.3)E i

( 3.6 t 2.6)E O

( 4)

( 1.5 -

3.0)E 1

(-1.0 -

8.0)E O

(

4/ 4)*

(

1/ 1)*

( 0/ 3)*

ION-ROUTIE REFERS TO TE MMER OF SEPMATE EASWEENTS leilm EE mEATER T)MN TEN (10) TIES TK AWR/4E BAO(0ROWD Fm TE PERIOD CF TE RER)RT.

- TE FRACTION CF S#f'LE NW.YSES YlELDING DETECTAELE EAMDENTS (1.E. >3 STD DEVIATIONS) l$ INDICATED WITH *(

)*.

E)WIROMNTAL RADIOLOGICAL PROGRAM S(AfMRY MA!E YAftIE ATOMIC PGER STATION, WISCASSET, E JAPAJARY - ECDBER 1987 ED!lMr 1%RIE ALGE (NITS PCI/KG ET INDICATOR STATIONS STATION WITH HIGEST H CONTROL STAT!0tG

: :. :-"::4

- w ne:::::::.::::nei te++nenw+ nee RADIOMRIDES M

M EAN (NO. ANALYSES)

RE9)! RED RANCE STA.

RANE RANGE (NON-ROUTIE)'

LLD N0. DETECTED **

NO.

NO. DETECTED **

NO. DETECTED ++

AlH 03 ( 7)

(

1.4t

.6)E O 24

( 3.5 t 3.5)E O

( 0)

(l.8 - 26.9)E -1

(-5.3 - 104.0)E -1

(-5.3 - 104.0)E -l

(

0/ 4)*

( 0/ 3)*

(

0/ 3)e RJ-106 ( 7)

( 3.61 7.5)E O 01

( l.8 2.5)E 1

( 1.7 i

.5)E I

( 0)

(-1.5 -

1.8)E 1

( 8.9 - 25.4)E O

(

0/ 4)*

et 0/ 1)+

( 0/ 3)*

SB-124 ( 7)

( 3.4f 1.5)E O 01

( 7.5 t 3.7)E 0

(-1.4 i 2.5)E O

( 0)

( l.2 -

7.5)E O

(-6.2 -

2.3)E O

(

0/ 4)*

( 0/ 1)e

( 0/ 3)*

I-131 ( 7)

( -4.21 26.8)E -1 24

( 3.8 i 3.llE I

( 3.0 t 3.1)E 1

( 0)

(-6.8 -

5.7)E O

(-1.4 -

9.4)E 1

(-1.4 -

9.4)E 1

(

0/ 4)*

et 0/ 3)*

( 0/ 3)*

CS-134 ( P

(

!.41

.3)E O 02 ( 2.1 i 3.0)E O

(-1.9 i 9.4)E -1

( 0)

( 6.8 - 20.5)E -1

(-1.9 -

1.3)E O

(

0/ 4)*

st 0/ 1)e

( 0/ 3)*

CS-137 ( 7)

(

7.51 2.7)E O 01

( l.2 i

.6)E 1

( l.3 i 2.2)E O

( 0)

( l.5 - 12.2)E 0

(-2.9 -

4.2)E O

(

2/ 4)*

( 0/ 1)*

(

1/ 3)*

E-141 ( 7)

(

l.it

.9)E 0 01

( 2.8 t 3.1)E O

(-2.8 t 2.1)E O

( 0)

(-6.4 - 28.1)E -1

(-6.8 -

.4)E O et 0/ 4)e

(

0/ 1)+

( 0/ 3)*

E-144 ( 7)

( -7.5t 9.7)E 0 01

( 8.9 t 12.3)E O

(-6.4

5.6)E 0

( 0)

(-3.5 -

.9)E 1

(-1.7 -

.1)E i l

( 0/ 4)*

( 0/ 1)*

(

0/ 3)*

I TH-232 ( 7)

( 6.5t 2.3)E 1 01

( l.2 i

.1)E 2

( 2.2 i

.9)E 1 l

( 0)

( 2.2 - 12.3)E I

( 3.6 - 35.2)E O

(

4/ 4)+

(

1/ 1)*

(

1/ 3)*

l NON-ROUTIE REFERS TO TE NMER CF SEPMATE EARRENENTS WHICH EFI (PEATER T)W( TEN (10) TIES TE AVERAE BACXCELND FOR TE PERIOD OF TE REPORT.

TE FRACTION OF S#f'LI MALYSES Y!t1Dlm DETECTAR.E EASLREENTS

(!.E. >3 STD KVIATICMS) IS INDICATED WITH *(

le. l

3.9 Sediment Sediment core samples were collected from two locations during May and November. The Cs-137 detected in r,ediment at SE-16 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 statico reasurements.

Levels have generally decreased over the past several years. A slight increase during 1987, along with the appearance of Cs-134 in one SE-16 sample, may be due at least in part to the recent introduction of additional Cesium fallout into the environment from the Chernobyl accident in mid-1986.

This trend is shown in Figure 3.4.

Cobalt-60 was detected in several samples from both locations and is due to plant discharges. There is no reporting level for Cs-134 Cs-137, or 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, these sites are not occupied, nor are they used for recreational purposes, since they are within the site boundary.

In addition to the above radionuclides, naturally occurring Be-7, K-40, and Th-232 were detected in sediment samples.

1 l 0451R/23.220 l

FIGURE 3.4 CESIUM-137 IN SEDIMENT MAINE YRNKEE RTOMIC POWER COMPANY, WISCRSSET, ME 10000 D - SE-16, OLD 00TFRLL, 0-5 CM 0000 -

o - SE-16, OLD OUTFRLL, 5-10 CM A - SE-16, OLD 00TFRLL, 10-15 CM

+ - SE-18, FOXBIRD ISLRND, 0-5 CM 8000-X - SE-18, FOXBIRD ISLRND, S-10 CM o - SE-18, FOXBIRD ISLRND,10-15 CM i

n E

E 3 8000 -

R Y

[ sooo-M Egn O$

3000-2000 -

1000 -

M n.k _A.

=.+

=

x m

0.........................................................................................

JMMJ 0D MMJ 0D MMJ 00 MMJ 00 MMJ 0D MMJ 0D MMJ 0D MMJ D 1980 1981 1982 1983 1984 1985 1986 1987

EWIR0PfENTAL RADIOLOGICAL PR0mAM SlimARY J

l%IE YAWEE ATOMIC PMR STATION. WISCASET. E JANJARY - DECEMER 1987 EDilA1: SEDIENT LNITS: PCI/KG DRY INDICATOR STATIONS STATION WITH HIGEST EAN CONTROL STATICH3 annuemmm ww++menunemenn

..::nm RADIONtXI. IDES EAN EAN EAN (NO. ANALYSES) REQUIRED RANE STA.

RANCE RANCE (NON-ROUTIEl' LLD NO. ETECTEDet NO.

NO. IETECTEDn NO DETECTED ++

BE-7 ( 12)

( 6.3f 7.3)E 1 18

( 9.5 i 12.7)E 1 HD DATA

( 3)

(-3.2 -

5.3)E 2

(-3.2 -

5.3)E 2

(

3/ 12)*

(

2/ 6)*

K-40 ( 12)

(

l.91

.0)E 4 16

( !.9 i

.0)E 4 PC DATA

( 0)

( !.0 -

2.1)E 4

( !.0 -

2.0)E 4

( 12/ 12)*

(

6/ 6)*

IW-54 ( 12)

( -1.31

.4)E I 18

(-8.6 1 6.8)E O NO DATA

( 0)

(-3.7 -

1.0)E 1

(-3.7 -

1.0)E 1

(

0/ 12)*

(

0/ 6)*

CO-58 ( 12)

( -0.41 4.5)E O 16

(-5.7 i 8.3)E O NO DATA

( 0)

(-3.0 -

2.5)E 1

(-2.7 -

2.5)E 1

(

0/ 12)*

(

0/ 6)*

FE-50 ( 12)

(

!.11 1.2)E 1 18 ( l.7 i 1.3)E 1 NO DATA

( 0)

(-8.6 -

5.5)E 1

(-2.7 -

4.8)E 1

(

0/ 12)*

(

0/ 6)*

CO-60 ( 12)

(

3.31

.9)E 1 16 ( 4.6 i

.9)E 1 PC DATA

( 6)

(-3.5 - 851.0)E -1

( 2.1 -

8.1)E 1

(

6/ 12)*

(

4/ 6)*

ZN-65 ( 12)

(

8.01 8.4)E O 18 ( l.5 i 1.2)E 1 FC DATA

( 0)

(-2.6 -

5.1)E 1

(-2.6 -

5.0)E 1

(

0/ 12)*

( 0/ 6)*

ZR-95 ( 12)

(

l.li

.6)E 1 16 ( 1.5 i

.6)E 1 10 DATA

( 0)

(-4.2 -

3.8)E I

(-4.8 - 37.8)E 0

(

0/ 12)*

(

0/ 6)*

A0-110M( 12)

( -1.21 4.1)E O 16 ( l.5 i 5.1)E O NO DATA

( 0)

(-2.3 -

2.3)E 1

(-2.0 -

1.6)E 1

(

0/ 12)*

( 0/ 6)*

1

N(M-ROUTIE REFERS TO M NI.NER 7 SEPARATE EASLRDOTS le(ICH ERE GREATER T)MN TEN (10) TIES M AVERACE BACXm0.ND FOR M FERIOD OF M REFORT.

- M FRACTION 7 S#ftE #MLYSES YIEl. DING IETECTABLE EASLREENTS (1.E. >3 STD DEVIATIONS) IS INDICATED WITH *(

)*. e.--

y m

E)NIROWTAL RADIOLOGICAL PR0@#1 SlM%RY MIE YAMI ATOMIC PGER STATION, WISCASSET, E JANUNtY - DEEMER 1987 LN!TSt PCI/KG DRY EDIlmt SEDIENT

!)0!CATOR STATIONS STATION WITH HIGEST M CONTROL STATIONS e:.:

. :..: m

+mmmemmemem

- m ++ m e m ia RADICNJCt.!ES M

M M

(NO. AMLYSES) REQUIRED R#E STA.

RANCE RNEE (NON-ROUTIEl' LLD NO. DE1ECTED++

NO.

NO. DETECTEDH NO. DETECTEDH FU-103 ( 12)

( -4.2i 5.1)E 0 18

(-2.6 1 3.6)E 0 NO DATA

( 0)

(-2.9 -

3.0)E 1

(-1.8 -

.7)E 1

(

0/ 12)*

(

0/ 6)*

RU-106 ( 12)

(

3.5t 2.0)E 1 16 ( 4.0 t 3.7)E i NO DATA 1

( 0)

(-0.1 - 14.9)E 1

(-8.1 - 14.9)E 1

(

0/ 12)*

(

0/ 6)e SB-124 ( 12)

( 9.31 7.7)E 0 18 ( 1.5 i 1.1)E 1 N3 DATA

( 0)

(-3.5 -

4.1)E I

(-3.1 -

4.1)E 1

(

0/ 12)*

(

0/ 6)e I-131 ( 12)

( -5.0f 2.4)E 1 18

(-4.0 t 2.7)E 1 NO DATA

( 0)

(-2.0 -

.9)E 2

(-1.1 -

.6)E 2

(

0/ 12)*

(

0/ 6)e CS-134 ( 12) 150.

(

3.8*

3.0)E O 16 ( 4.8 i 5.6)E O NO DATA

( 1)

(-7.5 - 29.0)E O

(-7.5 - 29.0)E 0

(

1/!?)*

(

1/ 6)e CS-137 ( 12) 180.

(

3.61

.7)E 2 16 ( 5.4 i

.9)E 2 NO DATA

( 0)

(l.2 -

8.4)E 2

( 3.3 -

8.4)E 2

( 12/ 12)*

( 6/ 6)*

G-141 ( '2)

(

2.7f

.9)E 1 18 ( 2.9 i 1.1)E 1 NO DATA

( 0)

(-3,0 -

6.7)E 1

(-2.2 -

5.5)E 1

(

0/ 12)*

et 0/ 6)*

E -144 ( 12)

( -5.21 2.3)E i 18

(-5.1 t 4.0)E 1 10 DATA

( 0)

(-1.9 -

.4)E 2

(-1.9 -

.4)E 2

(

0/ 12)*

(

0/ 6)e TH-232 ( 12)

(

7.7*

.3)E 2 16 ( 8.5 i

.2)E 2 NO DATA

( 0)

( 5.5 -

9.3)E 2

( 7.9 -

9.3)E 2

( 12/ 12)e

(

6/ 6)e

NON-fl0VTIE EFERS TO M lufER CF SEP@ ATE EARFIENTS WICH ERE @ EATER T)MN TEN (10) TIES TE AGE EACXCEUND FM M FERIOD CF TE REPmi.

H TE FRACTION OF S#ftE NMLYSES Y!ELDI)0 ETECTAELE EARFDENTS (i.E. >3 STD DEVIATICNS) IS !)0!CATED WITH *(

le. -

3.10 Finfish Two finfish samples were collected during 1987. Each sample was analyzed for gamma-emitting radionuclides.

Except for naturally occurring K-40, no radioactivity was detected, t

1

~ ~

0451R/23.220 1

l

E)NIROMOTM. RADIOLOGICAL PR0mAM Rft%RY l%!E YAWEE ATOMIC POWER STATION. WISCASSET. E JANUARY - DECOEER 1987 EDitM: FlWISH LMITS: FCl/KG ET IM)lCATE STATIONS STATICH WITH HIGE ST M CCHTRCL STATIONS

++++++++ ue++ni RADIOMJCLIDES EAN EAN M

(NO. ANALYSES) M IRED AN8E STA.

RANGE RANGE (NON-fl0U1'E)'

LLD NO. IETECTED++

NO.

NO. DETECTEDH NO. [ETECTEDH BE-7 ( 2)

( -4.9i 8.8)E 1 24

( 3.3 i 83.6)E O

( 0)

( 0/ 1)*

(

0/ 1)*

(

0/ lie K-40 ( 2)

(

3.31

.3)E 3

( 3.3 i

.3)E 3

( 2.4 i

.2)E 3

( 0)

(

1/ 1)*

(

1/ 1)*

(

1/ 1)*

IW-54 ( 2) 130.

( -6.9t 9.4)E O 24 ( l.8 i

.8)E !

( l.8 i

.8)E 1

( 0)

(

0/ 1)*

( 0/ 1)*

( 0/ 1)*

CO-58 ( 2) 130.

( 8.61 II.3)E 0 24 ( !.7 i

.9)E 1

( l.7 *

.9)E i

( 0)

( 0/ 1)*

(

0/ lie

( 0/ 1)*

FE-59 ( 2) 260.

(

l.61 24.8)E O 11

( l.6 t 24.8)E O

(-4.1 1 2.4)E i

( 0) c( 0/ 1)*

(

0/ 1)*

( 0/ 1)*

CD-60 ( 2) 130.

(

!.3t 1.2)E 1

( !.3 1 1.2)E 1

(-1.7 f 1.2)E 1

( 0)

(

0/ lie

( 0/ 1)*

( 0/ 1)*

ZN-65 ( 2) 260.

(

4.71 21.1)E O 11

( 4.7 1 21.1)E O

(-2.3 i 23.6)E 0

( 0)

(

0/ 1)*

( 0/ 1)*

( 0/ 1)*

ZR-95 ( 2)

( -4.3t 20.0)E 0 24 ( l.2 i 1.6)E I

( !.2 i 1.6)E 1

( 0)

( 0/ 1)*

( 0/ 1)*

(

0/ 1)*

AG-110M( 2)

( -1.3t 1.0)E 1 24

(-2.6 1 10.1)E O

(-2.6

10.!)E 0

( 0)

(

0/ 1)*

C 0/ 1)*

( 0/ 1)*

NON-ft0VTIE REFERS TO M MMER OF SEPMATE EARRE)DTS IM104 nERE OREATER THAN TEN (10) TIES M AWRAGE BACXm0lND FCR M PERIOD CF M REMRT.

M FRACTION OF SMFLE #eLYSES YIELDING DETECTAILE EAREEENTS

+4 (1.E. >3 STD DEVIATIONS) IS INDICATED WITH *(

)*.

ENVIR0ptENTAL RADIOLOGICAL PROEAM Strf%RY I

7%!E YAEEE ATOMIC PGER STATION, WISCASSET E J48.lARY - E EMBER 1987 WITS: FCI/KG WET EDILIM: FlW191 INDICATOR STATIOPG STATION WITH H10EST M CONTROL STATIONS MMfMfMHfM4H HHtHHMtHtMt44HH4 M Het H44 HitH 1%D10MJQ.lDES M

EAN M

(NO. N% LYSES) EQUIRED IMNCE STA.

RANCE RANGE (N0 Nil 0VTIEl' LLD NO. ETECTED+e f().

NO. DETECTED 4+

NO. DETECTED ++

RtH 03 ( 2)

( 2.71 1.1)E 1

( 2.7 t 1.1)E 1

( l.7 t 1.1)E 1

( 0)

( 0/ 1)*

( 0/ 1)*

( 0/ 1)*

RJ-106 ( 2)

( -1.5t

.9)E 2 24

(-3.3

7.4)E 1

(-3.3 i 7.4)E 1

( 0)

( 0/ 1)*

( 0/ 1)*

( 0/ !)+

$8-124 ( 2)

( -1.91 2.4)E 1 11

(-1.9 t 2.4)E i

(-2.'? t 2.7)E 1

( 0)

( 0/ 1)*

( 0/ 1)*

( 0/ 1)*

I-131 ( 2)

(

1.5*

4.7)E 1 11

( l.5 t 4.7)E I

(-4.1 t 3.7)E 1

( 0)

( 0/ 1)*

(

0/ lle

(

0/ !)*

CS-134 I 2)

130,

( -3.4i117.0)E-1 11

(-3.4 t it7.0)E -1

(-1.5 i 1.0)E 1

( 0)

(

0/ 1)*

( 0/ 1)*

e( 0/ 1)*

CS-137 ( 2) 150.

(

1.9t 1.0)E I 11

( l.9 t 1.0)E 1

( l.8 t

.9)E I

( 0)

(

0/ 1)e

(

0/ lie

( 0/ 1)*

BA-140 ( 2)

(

l.2t 2.5)E 1

( 1.2

2.5)E 1

(-2.7 i 2.6)E 1

( 0)

(

0/ 1)+

( 0/ 1)*

et 0/ 1)*

E-141 ( 2)

(

1.7t 1.6)E 1 24 ( 2.4 i 1.4)E 1

( 2.4 i 1.4)E 1

( 0)

(

0/ 1)e

(

0/ 1)*

( 0/ 1)*

E-144 ( 2)

( -7.9t 4.5)E 1 24

( 3.2 t 4.1)E I

( 3.2

4.1)E 1

( 0)

(

0/ 1)*

( 0/ 1)e e( 0/ 11e N0PH10VTIE REFERS TO M MMER OF SEPARATE EAMEENTS WICH E @ EATER T)W TEN (10) TIES M AGE BAQUtMD FOR M PERIOD CF M REPET.

M Fl%CTION CF SANtE AWLYSES YlELDING CETECTABLE EAMEENTS (1.E. >3 STD EV!ATIONS) IS INDICATED WITH et le, o

3.11 Mussels Two mussel samples were collected from a total of two locations in 1987.

Each sample was analyzed for gamma-emitting radionuclides.

Except for naturally occurring K-40, no radionuclides were detected in any sample.

1 1

l l

1 0451R/23.220 i

EWIROWNTAL RADICLOGICAL FROGRM S(MWtY MAIE YMEE ATOMIC POWER STATION, WISCASSET E JANUARY - CECOGER 1987 LNITS: PCI/XG WET EDILM: ItJSSELS IEICATOR STATIONS STATION WITH H10EST EAN CONTROL STATIONS

e

- ::::: : :eeennnn enu+++n un*+

1%D10 ELIDES EAN EAN EAN (NO. ANALYSES) REQUIRED RM0E STA. RM0E RANCE MON-ROUTIEF LLD NO. DETECTEDn NO.

NO. DETECTEDee NO. DETECTEDn IE-7 ( 4)

( -2.7t 2.3)E 1 24

( 8.5 i

.7)E 1

( 8.5 t

.7)E 1

( 0)

(-5.1 -

.4)E 1

( 7.8 -

9.2)E 1

( 7.8 -

9.2)E 1

(

0/ 2)e

( 0/ 2)*

et 0/ 2)e K-40 ( 4)

(

1.3t

.5)E 3 11

( l.3 i

.5)E 3

( l.0 t

.1)E 3

( 0)

( 7.7 - 17.4)E 2

( 9.7 - 11.1)E 2 et 2/ 2)*

(

2/ 2)e

(

2/ 2)e IW-54 ( 4) 130.

( -1.0t 2.3)E -1 24 ( 2.0 t 23.4)E -1

( 2.0 t 23.4)E -1 1.3)E -1

(-2.1 -

2.5)E O

(-2.1 -

2.5)E 0

( 0)

(-3.4

( 0/ 2)*

(

0/ 2)*

( 0/ 2)*

CO-58 ( 4) 130.

( 8.lt 1.8)E 0 24

( 8.8 i 2.0)E O

( 8.8 t 2.0)E O

( 0)

( 6.3 -

9.9)E O

( 6.8 - 10.8)E 0

( 6.8 - 10.8)E O e( 0/ 2)*

( 0/ 2)*

(

0/ 2)e FE-59 ( 4) 260.

(

!.it 1.7)E 1 11

( !.1 i 1.7)E 1

(-2.3 i

.2)E 1

( 0)

(-6.0 - 27.5)E 0

(-2.5 -

-2.1)E 1 et 0/ 2)*

(

0/ 2)e

( 0/ 2)*

CO-60 ( 4) 130.

(

1.32 4.7)E-1 24 ( 1.6 i

.8)E 0

( 1.6 i

.8)E O 5.9)E -1

( 7.4 - 24.2)E -1

( 0)

(-3.4 et 0/ 2)*

(

0/ 2)e

( 0/ 2)e ZN-65 ( 4) 260.

( -5.8t

.2iE 0 11

(-5.8 i

.2)E O

(-7.9 t 13.2)E 0

( 0)

(-6.0 -

-5.6)E 0

(-6.0 -

-5.6)E O

(-2.1 -

.5)E 1 et 0/ 2)*

(

0/ 2)e

(

0/ 2)e ZR-U ( 4)

(

!.5t 4.0)E O 11

( 1.5 t 4.0)E O

( l.0 t 8.3)E 0

( 0)

(-2.5 -

5.5)E 0

(-2.5 -

5.5)E 0

(-7.3 -

9.3)E 0 et 0/ 2)e

( 0/ 2)*

( 0/ 2)*

AG-llCfil 4)

(

-4.5*

5.0)E O 11

(-4.5

5.0)E o

(-1.4 t

.4)E I

( 0)

(-9.5 -

.5)E O

(-9.5 -

.5)E 0

(-1.8 -

-1.0)E 1 et 0/ 21e f( 0/ 2)e

(

0/ 21e N0H0lTIE REFERS TO TE NMER CF SEPARATE EA9.RElOTS Wi!CH ERE CREATER e

THM TEN (10) TIES TE AWRACE BACKCRCOND FOR TE FERIOD CF TE REMRT.

++ TE FRACTION OF SAPLE 4% LYSES YlELD12 IETECTABLE EASUEENTS (1.E. >3 STD DEVIATIONS) IS I E!CATED WITH et

)*.

E)NIR0ptENTAL RADIOLCGICAL PR00R#( SMARY f

MAIE YAftIE ATOMIC POER STATION, WISCASSET, E J M ARY - DECEMBER 1987 EDIW: RJSSELS UNITS: PCI/KG WET INDICATOR STATIONS STATION WITH HIGEST M CONTRCI.STATICNS HMMMMHHHH MHMHtHHH4HHHHf MMHHHHHit RADIOM D.! DES M

M M

("?. ANALYSES) REQUIRED RMGE STA. RAME RANE (NON-ROUTIE)'

LLD NO ETECTEDet NO.

NO. DETECTEDH NO. DETECTED ++

RU-103 ( 4)

( -2.2t

.4)E O 24 ( l.2 i 2.2)E O

( l.2 i 2.2)E 0

( 0)

(-2.6 -

-1.8)E O

(-9.6 - 33.4)E -1

(-9.6 - 33.4)E -l

( 0/ 2)*

(

0/ 2)+

( 0/ 2)*

RU-106 ( 4)

( -2.5t 31.8)E 0 24 ( !.6 t 1.5)E 1

( l.6 i 1.5)E i 2.9)E I

( l.1 - 31.6)E 0

( !.1 - 31.61E 0

( 0)

(-3.4

(

0/ 2)*

(

0/ 2)*

( 0/ 2)*

C-124 ( 4)

( -1.4t

.6)E 1 24

( 3.0 t 12.7)E O

( 0)

(-1.9 -

.8)E 1

(-9.6 - 15.7)E O

(

0/ 2)*

(

0/ 2)*

+( 0/ 2)*

l-131 ( 4)

( 2.9t 1.9)E I 11

( 2.9 t 1.9)E 1

( l.7 t 1.8)E I

( 0)

( !.0 -

4.8)E 1 t 1.0 -

4.8)E 1

(-2.0 - 35.0)E O

( 0/ 2)*

( 0/ 2)*

(

0/ 2)e CS-134 ( 4) 130.

( -0.21 2.3)E 0 24

(-6.5 t 75.6)E -1

( 0)

(-1.0 -

.6)E 1

(-8.2 -

6.9)E O

(-6.2 -

6.9)E O

(

0/ 2)*

( 0/ 2)*

(

0/ 2)*

CS-137 ( 4) 150.

(

3.!t 2.6)E 0 11

( 3.1 t 2.6)E O

(-1.1 i

.5)E 1 56.8)E -1

( 5.1 - 56.8)E -1

(-1.6 -

.6)E 1

( 0)

( 5.1

(

0/ 2)*

(

0/ 2)e

( 0/ 2)*

BA-140 ( 4)

( -2.51 2.2)E 1 24

(-1.6 t

.5)E i

(-1.6 i

.5)E i

( 0)

(-4.7 -

3)E 1

(-2.2 -

-1.1)E 1

(-2.2 -

-1.1)E 1

(

0/ 2)e

( 0/ 2)*

( 0/ 2)*

E-141 ( 4)

( -1.4t 1.4)E 1 24

( 3.9 i 3.2)E O

( ?.9 i 3.2)E O

( 0)

(-2.8 -

.0)E 1

( 7.8 - 71.0)E -1

( 7.8 - 71.0)E -l

(

0/ 2)*

(

0/ 2)+

( 0/ 2)*

E-144 ( 4)

( 6.71 20.2)E O

( 6.7 t 20.2)E O

(-1.5 t

.4)E i

( 0)

(-1.3 -

2.7)E 1

(-1.3 -

2.7)E 1

(-1.9 -

-1.1)E 1

(

0/ 2)*

( 0/ 2)*

(

0/ 2)e

NON-ROUTIE REFERS TO M N.MBER OF SEPMATE EAC'PDENTS Wi!CH WEFE CREATER J

THAN TEN (10) TIES M A'4RAE BACXGEND FCR M PERIOD tr M REPCRT.

M M FRACTION OF S#FLE NW.ES YIELDIF; ETECTAILE EASLREENTS

(!.E. >3 STD DEVIATIOPG) IS IEICATED WITH *(

)*.,

3.12 Crustaceans Crustacean samples consisted of five crab samples collected from two locations, and three lobster samples collected from two locations over the course of 1987. Each sample was analyzed for gamma-emitting radionuclides.

Silver-110m was detected at low levels in the crab samples taken from CA-11 on June 29 and September 25.

A sample collected from the same location on July 20 did not show any detectable Ag-110m.

A lobster sample from the same location taken on September 25 also did not show any detectable Ag-110m.

The highest concentration in crabs was 38.8 +8.4 pCi/kg. This is well below the reporting level of 8000 pCi/kg for Ag-110m in fish and invertebrates.

(This reporting level was calculated based on 10CFR50 appendix design objectives for dose). While crabs may be caught and consumed from this area, they are not considered a commercially important species in the area.

To calculate an upper bound to the potential dose impact to man, Regulatory Guide 1.109 (Reference 3) methodology was used with a conservative annual average Ag-110m concentration of 38.8 pCi/kg. The critical organ dose for the maximally exposed individual, consuming 5 kg/ year of crab meat of this concentration, was approximately 0.01 mrem / year to the adult GI tract. This is insignificant with respect to the estimated background whole-body exposure from natural sources of over 200 mrem / year.

i i

l 49-0451R/23.220

E)NIRONUTAL RAD!100! CAL PROGRM SUrMViY MIE YANCEE ATOMIC POWER STATICN WISCASSET. E JANY - ECOGER 1987 ED!lM: CRUSTAEAN3 LNITS: PCI/KG ET INDICATOR STATIONS STATION WITH HIGEST H C0(TROL STATIONS

- munenune nununnenenumn euenm**mu RA010NU110ES M

EAN G

(NO. ANALYSES) RE0)!ED RANGE STA. RM0E RANE (NON-ROUTIE)'

L!.D NO. DETECTED **

NO.

NO. DETECTED **

NO. ETECTEDe*

BE-7 ( 9)

(

2.9*

1.4)E 1

!! ( 2.9 i 1.4)E 1

(-1.0 1 4.1)E 1

( 0)

( 4.9 - 83.6)E O

(-1.2 -

.6)E 2

( 0/ 5)*

(

0/ 5)6

( 0/ 4)*

K-40 ( 9)

(

2.4*

.2)E 3 11

( 2.4 i

.2)E 3

( 2.4 i

.3)E 3

( 0)

( l.9 -

3.0)E 3

( !.9 -

3.0)E 3

( l.9 -

3.0)E 3

(

5/ 5)*

(

5/ 5)*

(

4/ 4)*

M-54 ( 9) 130.

( -1.7t 4.3)E O 24

(-3.3 t 32.0)E-1

(-3.3 i 32.8)E -1

( 0)

(-1.4 -

1.2)E 1

(-8.1 -

5.8)E 0

(-8.1 -

5.8)E 0

(

0/ 5)*

( 0/ 4)*

e( 0/ 4)*

CO-58 ( 9) 130.

(

2.5*

2.6)E O

( 2.5 t 2.6)E O

(-5.2 1 1.9)E 0

( 0)

(-3.8 -

10.8)E O

(-3.0 - 10.8)E O

(-8,5 -

.1)E O

(

0/ 5)e

( 0/ 5)*

( 0/ 4)*

FE-59 ( 9) 2M.

( -1.lt 1.3)E 1 11

(-1.1 i 1.3)E 1

(-1.6 i

.8)E i

( 0)

(-6.3 -

1.3)E 1

(-6.3 -

1.3)E 1

(-3.3 -

.4)E 1

(

0/ 5)*

(

0/ 5)*

( 0/ 4)*

CO-60 ( 9) 130.

( -1.4t 1.8)E 0 11

(-1.4 i 1.8)E O

(-4.0 t 4.0)E 0

( 0)

(-7.7 -

3.1)E 0

(-7.7 -

3.1)E O

(-l.5 -

.3)E 1

(

0/ 5)*

( 0/ 5)*

( 0/ 4)*

ZN-65 ( 9) 260.

(

3.3t 5.1)E O 24

( 6.5 t 4.4)E 0

( 6.5

4.4)E o

( 0)

(-1.6 -

1.4)E 1

(-3.0 - 17.9)E O

(-3,0 -

17.9)E O l

(

0/ 5)e

( 0/ 4)*

( 0! 4)*

2R-95 ( 9)

( -2.lt 4.8)E O 24

(-2.3 t 34.7)E -1

.7)E 1

(-6.6 -

9.7)E O

(-6.6 -

9.7)E 0

)

( 0)

(-1.4 l

(

0/ 5)e

(

0/ 4)*

( 0/ 4)*

AG-!!0Mt 9)

(

!.3t

.7)E 1 11

( l.3 i

.7)E I

(-8.7 i 48.6)E -1

( 0)

(-5.3 - 388.0)E -1

(-1.3 -

1.1)E 1

(

2/ 5)e

( 2/ 5)*

( 0/ 4)*

NCN-RCl#!E REFERS TO TE NJMBER CF S&ARATE EARREES I44104 ERE @ EATER THAN TEN (10) TIES TE A20E BACKm0J4D Fm THE FERIOD OF TE REKRT.

- TE FRACTION CF SWLE AWLYSES Y!ELDIE ETECTABLE EASLFDO(TS (I.E. >3 STD [EVIA11CNS) IS ICICATED WITH *(

le.

EWIROMENTAL RADIOLOGICN. PR0mM SLMMY 1%IE YAM (EE ATOMIC POER STATION. WISCASSET. E JAMJARY - DEEMIER 1987 EDILM: CRUSTAEANS LNITS: K!/KG WET INDICATM STATIONS STATION WITH HIGEST EAN CONTROL STAT 10%

eununenmenmun H a ***** **H MDIONJCI.! DES EAN EM EAN (NO. AM.YSES) REQVIRED RANCE STA. RME KANCE (NON-ROUTIE)'

LLD NO. DETECTEDH NO.

NO. DETECTEDH N0. DETECTEDH RU-103 ( 9)

(

1.4k 3.0)E 0 20 ( 6.5 t 5.0)E 0

( 6.5

5.0)E O I

( 0)

(-4.2 - 12.6)E O

(-2.3 - 18.0)E O

(

0/ 516

( 0/ 4)*

( 0/ 4)*

RU-106 ( 9)

(

2.4t 22.1)E O 11

( 2.4 i 22.1)E O

(-6.2 t 28.9)E O

( 0)

(-5.6 -

7.7)E 1

(-5.6 -

7.7)E 1

(-7.6 -

5.9)E 1

(

0/ 5)*

( 0/ 5)*

( 0/ 4)*

O-124( 9)

( -1.lt

.9)E 1 24 ( 5.5 i ll.0)E O

( 5.5 11.0)E O

( 0)

(-4.2 -

.9)E 1

(-2.0 -

2.5)E 1

(-2.0 -

2.5)E 1

(

0/ 5)e

( 0/ 4)*

( 0/ 4)*

I-131 ( 9)

( -8.4k 8.1)E 1 24

(-2.0 t 1.0)E 1

.2)E 2

(-3.8 -

.9)E 1

(-3.8 -

.9)E I

( 0)

(-4.1

( 0/ 5)*

4( 0/ 4)*

( 0/ 4)*

CS-134 ( 9) 130.

( -3.4t 2.8)E O 11

(-3.4 1 2.8)E O

(-4.9 t 3.4)E 0

( 0)

(-1.3 -

.5)E 1

(-l.3 -

.5)E 1

(-1.5 -

.0!E 1

( 0/ 5)*

( 0/ 5)*

( 0/ 4)*

CS-137 ( 9) 150.

( -5.3t 3.1)E 0 24

( !.3 f 2.6)E O

( 1.3 t 2.6)E O

( 0)

(-1.5 -

.3)E 1

(-5.9 -

5.9)E O

(-5.9 -

5.9)E O

(

1/ 5)e

(

0/ 4)e

(

0/ 4)e BA-140 ( 9)

(

-3. 6 t 10.4)E 0 11

(-3.6 t 10.4)E O

(-5.2 i 9.7)E O 3.2)E 1

(-3.1 -

3.2)E I

(-2.2 -

1.2)E 1

( 0)

(-3.1

( 0/ 5)*

(

0/ 5)e

(

0/ 4)e E -141 ( 9)

(

5.61 4.0)E 0 11

( 5.6 i 4.0)E O

(-8.1

7.5)E O

( 0)

(-4.7 - 18.1)E 0

(-4.7 - 18.1)E O

(-2.9 -

.3)E 1

(

0/ 5)*

( 0/ 5)*

( 0/ 4)*

E-144 ( 9)

( -3.2t 9.5)E O

(-3.2 i 9.5)E O

(-1.6 2.0)E I

( 0)

(-2.8 -

2.4)E 1

(-2.8 -

2.4)E I

(-6.1 -

3.5)E 1

(

0/ 5)*

( 0/ 5)*

( 0/ 4)*

NON-ROUTIE REFERS TO TE !UfER OF SEPMATE EASUOOTS WICH ERE @ EATER T)W TEN (10) TIPES TE AWRACE BA0(MCWD FOR TE PERIOD CF TE REMET.

TE FRACTION OF S#ftE AM.YSES Y!ELDIE CETECTAILE EASLREENTS H

(1.E. >3 STD DEVIAT!06) IS INDICATED WITH *(

le.

3.13 Direct Radiation Direct gamma radiation exposure was determined from the use of thermoluminescent dosimeters (TLDs). Six calcium sulfate TLD dosimeters were placed at each of the monitoring stations and read out on a quarterly schedule.

One TLD badge set was lost during 1987. This was at TL-34 in the second quarter and was due apparently to theft in the field.

Summaries of the results can be seen in the table below and in Figures 3.5 through 3.11.

Complete data for the TLD Program are given in Table 3.1.

The mean 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 did not change significantly between 1986 and 1987. The above indicates that there were no detectable increases in direct gamma radiation to off-site locations due to the operation of Maine Yankee.

l 0451R/23.220 i

+.

.~-.,c w

w r--w--

--.v r-,-

r---m m--w--,

-,-,vn-

-m_.

.m,pp

,-m,-

Environmental Radiological Program Summary Maine Yankee Atomic Power Station, Wiseasset, Maine January - December 1987 Medium: Direct Radiation Measurements-(TLD)

Units: Micro-R per Hour Station With Control Inner Ring Outer Ring Highest Mean Stations Mean Mean Mean Mean Range Range Station Range RanFe (No. Meas.)*

(No. Meas..)*

No.

(No. Meas.)*

7.6 7.5 10.4 8.4 5.1 - 9.6 5.3 - 10.3 37 10.2 - 10.6 6.1 - 10.6 (72)

(67)

(4)

(12) f I

l i

l' I

Most measurements based on quarterly readings f rom six TLD chips.

l 0451R/23.220 t

Table 3.1 Environmental Direct Radiation Levels - 1987 Maine Yankee (micro-hour'per hour)

Yearly Location Type

Quarter 1 Quarter 2 Quarter 3 Quarter 4 Mean TL-1 I

6.5 7.5 7.9 7.0 7.2 TL-2 I

6.5 7.0 7.7 7.3 7.1 TL-3 I

6.3 7.3 7.9 7.3 7.2 TL-4 I

5.1 6.1 7.0 6.0 6.1 TL-5 I

8.6 9.5 9.0 8.2 8.8 TL-6 I

7.1 7.8 8.2 8.3 7.9 TL-7' I

6.2 7.4 7.8 7.6 7.3 TL-8 I

7.3 8.1 8.0 7.6 7.8 TL-9 I

8.0 9.3 9.4 9.6 9.1 TL-10 I

6.9 8.1 7.7 7.5 7.6 TL-11 0

6.9 8.1 8.7 8.1 8.0 TL-12 I

6.7 7.6 8.6 7.6 7.6 TL-13 I

8.7 9.4 9.2 8.9 9.1 TL-14 I

5.7 7.0 7.6 7.1 6.9 TL-15 I

5.5 6.6 7.4 6.1 6.4 TL-16 I

5.9 7.8 8.2 7.3 7.3 TL-17 I

7.0 8.7 9.4 8.5 8.4 TL-18 I

6.1 7.6 8.4 7.4 7.4 TL-19 I

6.7 7.2 7.8 7.1 7.2 TL-20 0

5.7 7.0 7.8 6.9 6.9 TL-21 0

6.2 7.1 7.8 7.0 7.0 TL-22 0

6.5 7.7 8.5 7.6 7.6 TL-23 0

7.3 10.0 10.3 9.4 9.3 TL-24 0

5.7 7.7 8.8 7.6 7.5 TL-25 0

5.4 7.9 8.7 7.7 7.4 TL-26 0

7.0 7.9 8.2 7.9 7.8 TL-27 0

6.4 7.0 7.7 6.9 7.0 TL-28 0

5.3 7.5 7.8 7.0 6.9 TL-29 0

6.6 6.4 7.9 6.9 7.0 TL-30 0

7.5 8.3 9.1 8.5 8.4 TL-31 0

7.4 8.7 9.1 8.6 8.5 TL-32 0

6.1 8.1 8.5 7.9 7.7 TL-33 0

5.9 7.3 7.9 7.4 7.1 TL-34 0

5.7 8.1 7.1 7.0 TL-35 0

5.9 6.8 7.6 6.5 6.7 l

TL-36 C

6.9 7.2 7.2 7.1 7.1 l

TL-37 C

10.4 10.2 10.6 10.4 10.4 TL-38 C

6.1 8.1 8.6 7.9 7.7 CI - Inner Ring; O = Outer Ring; C = Control.

1 ccNo data. 0451R/23.220

FIGURE 3.5 EXPOSURE RATE RT INNER RING TLDS, TL 01-06 MAINE YRNKEE ATOMIC PO' DER COMPANY, WISCASSET, ME 20 18 -

O - TL-01, OLD FERRY RD.

O - TL-02, OLO FERRY RD.

A - TL-03, B8ILEY HOUSE (ESL) is-

+ - TL-04, WESTPORT ISL.,.RT.

144 X - TL-05, MY INFORM 8 TION CENTER o - TL-06, RT.144 & GREENLERF RD.

3,_

5 a 12-

\\

~

10-f l

C W

I

~

j 6

g.

E m

6-i 4-2-

I ' II III' IV I II'III IV I

II III IV I

II'III IV I ' II III' IV ' I II 'III' IV

^

1982 1983 1984 1985 1986 1987

FIGURE 3.6 EXPOSURE RATE AT INNER RING TLDS, TL 07-10, 12-13 MHINE YANKEE ATOMIC POWER COMPRNY, WISCASSET, ME 20 18~

O - TL-07, WESTPORT ISL., RI.144 0 - TL-08' NY SCREENHOUSE A - TL-09 WESTPORT ISL., RT. 144

+ - TL-10, BRILEY POINT 23-X - TL-12, WESTPORT FIREHOUSE o - TL-13, FOXBIRD ISLRND li-h12-i i

x e

[ 10-Y y

fe o

e-I

~

E 6-4-

2-I ' II 'III ' IV I ' II 'III' IV I

II III' IV ' I II III IV I II III IV I

II III IV 1982 1983 19P4 1985 1986 1987

FIGURE 3.7 EXPOSURE RATE RT INNER RING TLDS, TL 14-19 MAINE YRNKEE RTOMIC POWER COMPRNY, HISCRSSET, ME 2a

- ~

O - TL-14, ERTON FRRM o - TL-15 ERTON FARM A - TL-16, ERTON FRRM

+ - TL-17', ERTON FRRH RD.

16-X - TL-18 ERTON FARM RD.

o - TL-19, ERTON FRRM RD.

14-5 a 12-b i

' 10-Y

.~

o

~

%,g s y jo

/

g.

i

/

- )

6-4-

2-

' II' IV I II III' IV 'I ' II III IV I

II 'III IV I II'III IV I 'II III' IV

^

I 1

11 1982 1983 1984 1985 1986 1987

FIGURE 3.8 EXPOSURE RATE AT OUTER RING TLDS, TL 11, 20-24 M8INE YANKEE RTOMIC POWER COMPatu, HISCASSET, ME 2c 18 ~'

O - TL-11, MRSON STATION O - TL-20, BRADFORD RD., HISCASSET A - TL-21, FEDERAL ST. HISCRSSET

+ - TL-22, C0CHRAN RD.$ EDGECOMB 16-X - TL-23 MIDDLE RD., EDGECOMB o - TL-24, RIVER RD., EDGECOMB 14-5 g 22-5 xd -

\\

0, 10-q

?

{.

hA

\\

~

5 s-L I

r I b 4-2-

T I

II 'III IV' I II III IV I II III IV I

II III IV' I II 'III' IV I

II 'III' IV 1982 1983 1984 1985 1986 1987

FIGURE 3.9 EXPOSURE RATE AT OUTER RING TLDS, TL 25-30 MAINE YRNKEE ATOMIC POWER COMPANY, HISCASSET, ME 20 le-D - TL-25, RIVER RD. & RT. 27 o - TL-26, RT. 27 & BOOTHBRY RR MUSEUM A - TL-27, BRRIERS ISLAND E. SHORE RD.

-+-- TL-28, HESTPORT ISL. ILER 16-X - TL-29, HRRRISDNS TRA o - TL-30, LEEMAN FRRM, WOOLHICH 14-er 8 12-r D

Y

' ' ~

ry

$e-i h

^

>x

(

i 6-4-

2-1 II III IV I II 'III' IV I

II 'III IV I

II III' IV I II III IV I

II III' IV

^

~

^

1982 1983 1984 1985 1986 1987

/

FIGURE 3.10 EXPOSURE RATE AT GUTER RING TLDS, TL 31-35 MRINE YRNKEE RTOMIC POWER COMPRNY, WISCRSSET, ME 20 18-D - TL-31, BARLEY NECK RD., WOOLHICH o - TL-32, BRKER FRRM WO0f.AICH A - TL-33, RT. 127 HbOLW'3H 16 --

+ - TL-34, RT. 127 WOOLHICH X - TL-35, RT. 127 DRESDEN 14-

.]g 12-6

' 10-g T

\\'

1

)

S 8-e r

tw 6-1 4-2-

1 II 'III' IV I

II 'III' IV I ' II 'lII' IV I

II III IV I II III IV I II III IV 1982 1983 1984 1985 1986 1987

FIGURE 3.11 EXPOSURE RATE RT CONTROL TLOS, TL 36-38 MRINE YRNKEE RTOMIC POWER COMPRNYg. HISCASSET, ME 20

~

O - TL-36, BOOTHBRY HRBR FIRE STR.

O - TL-37 BRTH FIRE STR.

~

16-14-12 -

i E

,o.

M

[

~N'<">

3 e,

=2 6-4-

2-

~

0 i

4 I

II III. IV I II III IV I

II III IV I II III IV I

II III IV I II III IV 1982 1983 1984 1985 1986 1987

4 m

-4.0 ' QUALITY ASSURANCE PROGRAM Three separate Quality Assurance programs were performed during 1987 to dimonstrate 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 enalysis. -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 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 of_ laboratory equipment, use of reference standards for calibration, datermination of counting efficiencies and analysis of blank and spiked semples. The records of the quality control program are reviewed by the responsible cognizant individual, and corrective measures are taken whenever opplicable.

A blind duplicate program is also used. Samples from five nuclear plcnts, including Maine Yankee, 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 Intralaboratory Results I-The Quality Assurance Prograa implemented at the analytical laboratory indicated good precision and accuracy in reported values. Table 4.1 shows the results of accuracy e.nd precision for laboratory analyses in 1987 for intralaboratory analyses and EPA interlaboratory cross-check analyses. For cccuracy, 61.7 and 87.4 percent of the results were within 5 and 10 percent of tha known values, respectively, with 96.2 percent of all results falling within the laboratory criteria of 15 percent. For precision, 86.4 and 0451R/23.220

97.5 percent of the results were within 5 and 10 percent of the mean, rcspectively, with 99.6 percent of all results meeting the laboratory criteria cf 15 percent.

The results of the EPA Interlaboratory Comparison Program, when c:nsidered apart from the remainder of the Quality Assurance program, were satisfactory in 1987. One hundred and sixty-eight analyses were performed on cir particulate filters, milk, food, u/ine, and water. Based upon this sample cnalysis total, 166 analyses (i.e., 99.0 percent) met the EPA's definition of menn value criteria.

The sample analyses that did not meet the criteria were o Ru-106 analysis in a water sample and a gross-beta analysis, also in a water sample. A recount of the beta samples yielded measurements that met the above l

criteria.

(Details of this may be found in Reference 2.)

l Blind Duplicate Program A total of 49 paired samples were submitted by the five participating f

plcnts for analysis during 1987. 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 cgreement was established.

If the paired measurements fall within ! 15 percent of their average value, then agreement between the measurements has b2en met.

If the value falls outside of the i 15 percent, then a two standard dsviation range (95 percent confidence level) is established for each of the enalyses.

If the ranges overlap, agreement is obtained.

One thousand two hundred and forty-two paired duplicate measurem:nts ware analyzed for 1987. A total of 99.5 percent of all measurements fell within the established criteria discussed above. The six measurements that did not meet the criteria were measurements of Ag-110m in milk, Mo-99 in milk, Fa-59 in ground water, Sb-124 in estuary water, Fe-59 in sea water, and Mo-99 in mussel bodies. 0451R/23.220

a A6Y 4,

Table 4.1 EPA Interlaboratory and Intralaboratory Results - 1987 Accuracy Total' Number of Samples 0 to 5%

0 to 10%

0 to 15%*

729 450 637 701 (61.7%)

(87.4%)

-(96.2%)

Precision Total Number of Samples 0 to 5%

0 to 10%

0 to 15%*

721 623 703 718 (86.4%)

(97.5%)

(99.6%)

o This category also contains those samples having a verified zero concentration which were analyzed and found not to contain the isotope of interest. 0451R/23.220

l' In all of the above cases, the radionuclide in question was not

[

dstected in the sample and a three standard deviation acceptance criteria was met. The six duplicate measurements represent 0.5 percent of all the blind duplicate paired measurements made during 1987. No trend was evident with respect to repeated failings of measurements for the above radionuclides.

I L-t 3

h 0451R/23.220

i 5.0 LAND USE CENSUS Specification 4.8.B of the Radiological Ef fluent Technical l

s Specifications requires that a Land Use Census be conducted annually between l

ths dates of June 1 and October 1.

The 1987 census was completed within this time frame. The census is used to identify the location of the nearest milk i

enimal, the nearest re'idence, and the nearest garden of 50 square meters s

within five miles of the plant. The distance from the plant for each of the cbove locations is shown in Table 5.1.

The dosimetric comparison required by Specification 4.8.B.2 showed that

.ths milk animals at N, 2.7 km and ESE, 7.1 km were preferred as milk sampling locations over TM-16 and TM-17.

However, it was felt that samples of sufficient volume would not be available on a regular basis due to the small number of cows at each location. The existing sampling locations, TM-16 and t

TM-17, were therefore retained.

t l

l i

h I

l l

t h

t' 0451R/23.220

s.

A

-Table 5.1 Maine Yankee 1987 1.and Use Census Results Nearest Nearest Nearest' Residen:e Milk Animal Garden Sector (km)

(km)

N 1.3 2.7 1.3 2.5 NNE 2.3 1.3 NE l'. 3 1.2 ENE 0.9 0.9 E

0.9 ESE 1.4 7.1 1.5 3.2 SE 0.7 1.0 SSE 0.9 2.7 S

1.7 5.2 SSW 3.0.

l-SW 1.4 7.9 3.8 3.0 WSW 1.0 I

W 2.6 7.2 2.7 2.8 WNW 0.8 2.0 NW 2.0 1.4 NNW 1.1

-- 0451R/23.220

6.0

SUMMARY

During 1987, Maine Yankee's environmental monitoring program detected trece levels of man-made radionuclides in the vicinity of the Maine Yankee picnt. Most of this radioactivity resulted from nuclear weapons testing and th) Chernobyl nuclear accident.

Plant operations may have contributed to the trace amounts of l

rcdioactivity in several samples.

In all cases, the levels of radioactivity dstected were much less than the applicable Technical Specification reporting 1svels and are judged to have no environmental or health impact.

i 1

r F

i i

L 0451R/23.220 r

9

?

i

7.0 REFERENCES

1.

Yankee Environmental Radiation Measurement Laboratory Quarterly Status Report, April-June 1987, Yankee Atomic Electric Company.

b.

Yankee Environmental Radiation Measurement Laboratory Quarterly Status Report, October-December 1987, Yankee Atomic Electric Company.

I 3..

USNRC Regulatory Guide 1.09. Revision 1. "Calculation of Annual Doses to Man From Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance With 10CFR50, Appendix I."

t 4 0451R/23.220

..

ML20151Y588

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7.0 REFERENCES

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