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Environ Radiation Monitoring Program,Rept 10,1977. W/
	ML20238A374
Person / Time
Site:	Pilgrim
Issue date:	12/31/1977
From:	Andognini G, Kannenberg S, Sowdon T; BOSTON EDISON CO.
To:	; NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
	78-55, NUDOCS 8708310049
	Download: ML20238A374 (109)
	v • d • e

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BOSTON EDISON COMPANY PILGRIM NUCLEAR POWER STATION Environmental Radiation Monitoring Program REPORT NO. 10 JANUARY 1, 1977 THROUGH DECEMBER 31, 1977 '~ Prepared by: Susan L. Kannenberg Senior Environmental Scientist ' " #~ "C Reviewed by: Thomas L. Sowdon Radiological Engineer Approved by: AII).M Fred J.UMogolbsko Manager of Environmental a Science Group e Date of Submittal: April 1, 1978

l TABLE OF CONTENTS l Page 4 I. INTRODUCTION AND

SUMMARY

l i II. DESCRIPTION OF THE MONITORING PROGRAM 3 I III. MONITORING DATA AND RESULTS 17 L A. Terrestrial Environment 18 -j 1. Air Particulate 18 2. Gaseous Iodine 20 3. Food Crop - Cranberries 20 4. Garden Crops - Lettuce, Swiss Chard, Corn, Onions, Potatoes 21 5. Forage - Ground Feed 22 6. Milk 22 7. Domestic and Recreation Water (Surface Water) 24 B. Aquatic Environment 24 1. Seawater 24 i l 2. Marine Life - Molluscs and Lobster 46 l 3. Marine Life - Finfish 50 4. Marine Life - Irish Moss and Sediments 51 C. Direct Radiation 72 1. Continuous Thermoluminescent Dosimetry 72 2. Field Survey 73 IV. ANOMALOUS MEASUREMENTS 80 V. EFFLUENT RELEASE DATA 91 VI. REFERENCES 99 iii

LIST OF ILLUSTRATIONS. Figure No. Page 1 II-l Location of' Offsite Monitoring Stations 4 TI-2 Location of Onsite. Monitoring Stations 5, II-3 Aquatic and Terrestrial Surveillance Stations. 6. II-4 Mollusc, Algae and Sediment Sampling Stations. 7 II-A-la Gross Beta Activity In Air Particulate (All Indicator Stations 1977) 25 '1 .1 III-A-lb Gross Beta Activity In Air, Particulate, (Control Station - 1977) 26 ~ III-A-lc ' Gross. Beta Activity In Air Particulate (1970 to 1977) 27 III-A-2 Sr-89 In Milk 28 III-A-3 Sr-90 In Milk 29 III-A-4 I-131 In Milk 30-III-A-5 Cs-137 In Milk 31 III-A-6 Concentrations of Strontium-90 and Cesium-137 In Milk (Plymouth 1970 - 1977) 32 -] III-B-1 Co-60 In Shellfish 54 III-B-2 Co-60 In Sediments 55 III-B-3 Zr-95 In Sediments 56 III-B-4 Cs-137 In Sediments 57 V-A-1 Liquid Fission Product Release 92 V-A-2 Liquid Activation Product Release .93' V-B-1 Gaseous Fission Product Release 94 V-B-2 Gaseous Activation Product Release 95 l 1 j I I iv ~ l. w _ _ _ _ _ --___--- -

1 LIST OF TABLES d Table 1:o. Page II-l Terrestrial Sampling Schedule 8 II-2 Marine Sampling Schedule 9 j II-3 External Gamma Exposure Surveillance Stations ) (TLD) 10 II-4 Air Particulate and Gaseous Radiciodine Surveillance Stations 11 II-5 Terrestrial Sampling Locations 12 4 II-6a Environmental Sample Analysis Parameters 13 1 II-6b Typical Detection Sensitivities Achievable j by High Resolution Ge (Li) Gamma Spectroscopic Analysis of Environmental Samples 14 j II-7a Environmental Sample Analysis Parameters 15 i II-7b Required Minimum Sensitivities (Effective Af ter April 19, 1977) 16 1 1 i III-A-1 Isotopic Concentrations In Air Particulate 33 J III-A-2 Gaseous I-131 Concentrations 35 III-A-3 Isotopic Concentrations In Cranberries 36 l III-A-4 Isotopic Concentrations In Garden Crops 38 III-A-5 Isotopic Concentrations In Forage 40 III-A-6 Isotopic Concentrations In Milk 42 III-A-7 Isotopic Concentrations In Surface Water 44 III-B-1 Isotopic Concentrations In Seawater 58 III-B-2a Isotopic Concentrations In Arthropods (Lobster) 61 III-B-2b Isotopic Concentrations In Shellfish (January 1 - April 20, 1977) 63 III-B-2c Isotopic Concentrations In Shellfish (April 20 - December 31, 1977) 64 III-B-3 Isotopic Concentrations In Fish 66 III-B-4 Isotopic Concentrations In Aquatic Vegetation (Irish Moss) 68' v

1 i i i LIST OF TABLES (Continued) l l Table No. Page III-B-5 Isotopic Concentrations in Sediments 70 III-C-1 Direct Radiation Exposure Rates - January, February, March, April /May 1977 75 l III-C-2 Direct Radiation Exposure Rates - June, July, August, September 1977 76 III-C-3 Direct Radiation Exposure Rates - October, l November, December 1977 77 1 III-C-4 Quarterly Average Exposure Rates - 1977 78 1 III-C-5 Field Survey Exposure Rates 79 V-A Semi-Annual Summary of Radioactive Liquid Effluents 96 V-B Semi-Annual Summary of Radioactive Gaseous Effluents 97 l 1 i 1 I I i vi 1 1 l i .__ ___._.mna

) I. INTRODUCTION AND SUMMAM' Boston Edison Company maintains a Radiological Monitoring Pro-gram which includes surveillance of radioactivity in the environment of Pilgrim Nuclear Power Station (PNPS) by sampling various media t l both on and off the site. During 1977, the detonation of a nuclear weapon in the atmosphere by China in late September, produced clear 1 evidence in environmental media, including air particulate samples, cranberries (harvested and sampled soon af ter the event), milk and swiss chard lettuce samples taken adjacent to the Pilgrim site. The aquatic environment by contrast showed no evidence of recent weapons j i 1 fallout, but did reflect Pilgrim releases of Mn-54 and Co-60 in l seawater, Irish moss and mussels. Lobsters, an important commercial crop, and fish did not exhibit significant radioactivity. Plant related radioactivity found in marine life had negligible dose impacts upon humans. Three anomalous reports were made to NRC involving isotopic con-centrations found to be more than ten times control station concen-trations. In some cases these resulted from very low detection limits in the background sample, rather than activity in indicator samples. In other cases, PNPS releases were the source of the observed activity. In all cases, the dose impact and concentration levels were far below applicable regulatory limits. 1

1 1 l l l l PNPS operating level ranged from a capacity factory above 70% from January through July 1977 (except May), to near or-at shutdown, i the balance of the year. Radioactive effluent discharges (regardless of the plant's operating level at the time of the discharges) are the important plant activity with respect to establishing relation-ships to observed environmental radioactivity. Reference to these 1 releases is made throughout the discussion of the environmental 1 measurements. l l l 2 L------____-----------___-_.

II. DESCRIPTION OF THE MONITORING PROGRAM During 1977, the radiological surveillance program underwent a significant upgrading due to the technical specification revision of April 19, 1977. Sampling locations and frequencies were specified, detection minimum sensitivities established at very low activity levels for certain sample media, and procedural and accountability requirements set. In the following section, elements of the sur-veillance program specific to requirements before and after the l technical specification change are so identified. j i Figure II-l displays offsite monitoring locations for air sam-l i plers (with particulate and gaseous iodine collection device) and thermoluminescent dosimeters (TLD's); Figure II-2 shows onsite loca-l tions. Figure II-3 shows aquatic and terrestrial surveillance l l stations and Figure II-4, mollusc, algae and sediment stations. Sampling schedules are given in Tables II-1, II-2, II-3, II-4, and II-5. Table II-6a and Table II-6b define detection limits and l analyses methods appropriate to the requirements in effect prior to April 19, 1977. Following this date, applicable criteria to be observed are shown in Tables II-7a and II-7b. l 2 A census of vegetable gardens 500 ft or more performed in accordance with technical specification requirements located 0.5 mi SE at Greenwood property, the site of maximum dose to the thyroid of I-131 deposited upon edible vegetables. Accordingly a sample was obtained from this garden, the analysis of which is found in Section III-A-4. Similarly a census of milk animals located a milk-producing goat at 0.8 mi WSW, the residence of a family with children. This location will be included in the sampling program during 1978. 3

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'O k/lgg. ' 0 17 - i i '. U MILE3 O 19 ata P oa y Cape Cod Boy r ov=4mv 6kilt g gg All E 6Sr Mymouth nta 12,. 4 Rocky hmt O con 1b3 .O 13 > P 5 yAN D ( 6 .21 . 14 0. 7g e 0 "%7' 10 5 og, 58 og a > 0 DOMESTIC AND RECRF ATIONAL WATER [ U SEAWATER l-E//ssv#4 g CROPS ' \\ arbor H A MILK LEGEND 1 DISCHARGE CH ANNEL (DC) 12 DEEP WATER PUMPlNG ST ATION - LOUT PONDll) 2 COOLING WATER INTAKE (ICH1) WELL AND LIT 1LE SOUTH POND (LW)- PLYMOUTH 3 POWDER POINT DUXBURY (PP) 13 PLYMOUTH COUNTY F ARM (CF) III 4 PLYMOUTH BE ACH (PLBl(1) 14 SOUTH POND (1) 5 PRISCILLA BEACH (PRB) 16 COLLEGE POND (CP)(3) 6 WHITE HORSE BE ACH (WEB) 16 BRIDGEWATER STATE F ARM (BF) 7 BE AVER DAM ROAD BOG (BR)(Il 17 GREAT POND PUMPlNG STATION (GP)(1) B LONG POND ROAD BOG 1I) SOUTH WEYMOUTH 9 M ANOMET PT. PO AD BOG (MR) 18 PINE ST BOG, HALIF AX (PS) 10 BARTLiiTT ROAD BOG (BR) 19 WHITM AN F ARM (WF) 11 WARNFR'S POND PUMPlNG ST ATION(1) 20 BARTLETT POND (EP) (2) IJANOMET WELL (MW) 21 GRE 6 NWOOD G ARDE N (SE) (2) (1) NO LONCER REQUIRED AS OF TECHNICAL SPECIFICATION REVISION 4/19/77 (2) RCOUIPFD BY TECHNICAL SPECIFICATION REVISION OF 4 /19/77 (3) OPTION AL. RECRE ATION AL WATER Figure 11-3. Aquatic and Terrestrial Surveillance Stations 6

A Scituate b Green Harbor (Marshfield) 6 l Cape Cod a* Bay A Duxbury Bay 0 1 2 3 4 5 r or Plymouth Harbor 'C# L' '" " # f, Plymouth Beach t Rocky Point Warren Q Cove 0 eA Manomet and Stage U Points 1 i LEGEND A. LOBSTE R O 1RlSH' MOSS. O g;;,y;;;, O SOFTSHELL CLAMS **: Harbor o MUSSELS' A SEDIMENT. 5 -l OllAHOGS ** (*) ! REQUIRED BY TECHNICAL SPECIFICATION REV1GeON 4t1907, (t). EITHER OF THESE SITES IS REQUIRED -

(**) OPTIONAL, NOT REQUIRED BY TECHNICAL SPECIFICATIONS Figure II-4.

Mollusc, Algae and Sediment Sampling Stations 7

TABLE II-l TERRESTRIAL SAMPLING SCHEDULE Number of Medium Frequency Sample Size Locations (1) Domestic ( ) Monthly Composites 4 liters 4 Water of Weekly Samples Recreation Monthly Composite 4 liters 1 Water of Weekly Samples Air Particulate Weekly 10,000 ft 11 j and Gaseous Iodine air Gamma Radiation Mon thly ' ( ) 4-section TLD 39 Quarterly Average (3) at each location Annually-Spring Beach survey 1 Tuberous and Annually at time 1,000 grams 2 Green Leafy of harvest Vegetables Beef Forage Annually 1,000 grams 1 Milk Monthly (4) 7.5 liters 2 Cranberries At time of harvest 1,000 grams 3 Locations are given in Tables II-3, II-4 and II-5 (2)No longer required af ter 4/19/27. (3) Required af ter 4/19/77. (4) Semi-monthly while animals are on pasture. (5) Optional sampling. 8

TADLE II-2 MARINE SAMPLING SCHEDULE Medium Frequency Sample Size Quantity Shellfish Quarterly 1000 grams 1 from each location

Irish Moss Semi-annually 1 liter dried 1 from each (Chondrus crispus) location
Lobst r Four times 450 grams 1 from each (Hon. rus americanus) per season location
Sediment Semi-annually Vertical core 1 from each to 30 cm location
Finfish**

Groups I & II Quarterly 400 grams 2 from each group Groups III & IV In season 400 grams 2 from each group Seawater (1) 7.5 liters 3

Sampling locations are shown in Figure II-4.

Finfish are from station vicinity.

- Groupings are shown below:

1. Bottom Oriented II. Near Bot-III. Anadromous IV. Coastal tom Dis-Migratory tribution Winter flounder Tautog Alewife Bluefish Yellowtail Cunner Rainbow smelt Atlantic herring flounder Atlantic cod Striped bass Atlantic menhaden Pollock Atlantic mackerel Hakes (1) Prior to 4/19/77, monthly samples with quarterly composites; after 4/19/77, weekly grab samples (continuously composited at discharge canal) monthly and quarterly composited for analysis. 9

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TABLE II-5 TERRESTRIAL SAMPLING LOCATIONS Direction and Distance Refer to Figure II-3 Medium Lccation from Unit 1 f.eactor Item No. Domestic WaterIII South Pcnd 4.75 miles WSW 14 Manomet Well 2.75 miles SSE 11 Lout Pond 4.75 miles W 12 Grcit Ponda 25 miles WNW 17 Recreation Water (2) College Pond 6.5 miles SW 15 Air Particulate Table II-4 Figures II-1, II-2 Gamma Radiation Table 11-3 Figures II-1, II-2 Lettuce, Cabbage, Plymouth County rarm 3.5 miles W 13 Potatoes, Corn Dridgewater State Farm

20 miles W

16 Swiss Chard Greenwood Garden 0.5 miles SE 21 Milk Plymouth County Farm 3.5 miles W 13 Whitman Farm

or Bridgewater Farm
21 miles NW 19 Cranberries Manomet Pt. Rd. Dog 2.6 miles SE 8

Bartlett Rd. Bog 2.75 miles SSE-S 10 Pine St. Bog; Halifax

17 miles WNW 18 Ilay Plymouth County Farm 3.5 miles W

13 Whitman Farma 21 miles NW 19

Control locations.

I1I No longer required after April 19, 1977. I2I Optional sampling. 12

TABLE II-6a ENVIRONMENTAL SAMPLE ANALYSIS PARAMETERS (For Technical Specifications in Effect Prior to April 19, 1977) IfI Sample Type Nominal and Humber Analysis Frequency Detection Limit Aliquot ~3 3 3 Air Particulate (7) Gross beta Weekly 4 x 10 pC1/m 10,080 ft ~3 3 3 Gross gamma Mon thly 2 x 10 cpm /m (b) 10,080 ft -2 3 1-131 Weekly 2 x 10 pegj,3 10,000 ft ~2 3 3 Gaseous Iodine (7) I-131 Weekly 4 x 10 pCi/m 10,080 ft Nonsaline Water (4) Gross beta Monthly 1 pCi/ liter 1,000 ml ICI Gross gamma Monthly 5 cpm / liter 4,000 ml Gamma spectrum (c) (d) 4,000 ml St-90 Monthly 0.5 pCi/ liter 1,000 ml U-3 Monthly 2.5 pCi/ml 4 ml Seawater (3) Fractional gross beta Monthly 5 pCi/ liter 500 ml Gross gamma Monthly 5 cpm / liter "I 4,000 ml I Gamma spectrum (e) (d) 4,000 ml H-3 Quarterly 2.5 pCi/ml 4 ml Sr-90 Quarterly 0.5 pCi/ liter 15,000 ml Cs-137 Quarterly 0.05 pCi/ liter 15,000 ml Mn-54 Quarterly 5 pCi/ liter 1,000 ml Co-50 Quarterly 5 pCi/ liter 1,000 ml Co-60 Quarterly 5 pCi/ liter 1,000 ml 2n-65 Quarterly 5 pCi/ liter 1,000 ml I-131 Quarterly 5 pCi/ liter 1,000 ml Milk (2) Sr-90 Monthly 2 pCi/ liter 1,000 ml Cs-137 Monthly 1 pCi/ liter 1,000 ml Ba-140 Monthly 5 pCi/ liter 1,000 ml I-131 Monthly 2 pCi/ liter 2,000 ml Bottom Sediment (1) Gross beta Semiannually 2 pCi/g 1g Gamma Spectrum Semiannually (d) 1,000 g Sr-90 Semiannually 0.005 pCi/g 100 g

Background

Gamma exposure Monthly 1 R/hr 1-month Radiation (19) rate (a) exposure NOTE: Provided by Interex Corp., Natick, Massachusetts. (a) Measured with thermoluminescent dosimeter. (b) In the counter used, 1 cpm corresponds to 2.2 pCi of Cs-137. (c) In the counter used, 1 cpm corresponds to 9 pCi of Cs-137. (d) Ge(L1) detection sensitivities are given in Table II-6b. (e) Selective gamma analyses are performed based on gross gamma results, with at least one gamma spectrum analysis each quarter. (f) Numbers in parenthesis are technical specification requirements; actual number of samples is usually greater than the minimum. 13

TABLE II-6b TYPICAL DETECTION SENSITIVITIES ACHIEVABLE BY HIGH RESOLUTION Ge (Li) GAMMA SPECTROSCOPIC ANALYSIS OF ENVIRONMENTAL SAMPLES l Water (1 liter) Solids Filters Nuclide pCi/l (400 gm) pCi/gm pCi/ Total Fil ter Be-7 8E+01 2E-01 2E-01 K-40 2E+02 5E-01 SE+01 Cr-51 8E+01 2E-01 8E+01 Mn-54 8E+00 2E-02 2E+00 Co-59 8E+00 2E-02 2E+00 Fe-59 lE+01 4E-02 3E+00 Co-60 8E+00 2E-02 2E+00 Zr-95 lE+01 4E-02 3E+00 Ru-103 8E+00 2E-02 2E+00 Ru-106 8E+01 2E-01 8E+01 1-131 lE+01 3E-02 2E+00 Cs-134 9E+00 2E-02 2E+00 Cs-137 9E+00 2E-02 2E+00 Ba-140 3E+01 8E-02 6E+00 La-140 2E+01 4E-02 2E+01 Ce-141 2E+01 4E-02 3E+00 Ce-144 8E+01 2E-01 2E+01 Ra-226 6E-01 lE-01 lE+01 Th-228 lE+01 2E-02 lE+01 Zn-65 2E+01 3E-02 3E+00 14

( i TABLE II-7a ENVIRONMENTAL SAMPLE ANALYSIS PARAMETERS (For Technical Specifications in Effect after April 19, 1977) Sample Type

Required **

and Number Analysis Frequency Detection Limit Aliquot -2 3 3 Air Particulate (11) Gross beta Weekly 1 x 10 pci/m 10,000 ft 3 Gamma spectrum Monthly 10,000 ft -2 3 Gaseous Iodine (11) I-131 Weekly 7 x 10 pCi/m 10,000 ft Soil (11) Gamma spectrum Every 3 Years Direct Radiation (20) Gamma exposure Quarterly 1 uR/hr 1 month of rate exposure Beach survey

Annually, in spring Seawater (3)

Gamma spectrum Monthly composite of weekly grab or continuously composited samples H-3 Quarterly 330 PC1/1 4,000 ml Shellfish (5) Gamma spectrum Quarterly 350 cc Irish Moss (3) Gamma spectrum Semiannually 350 cc Lobster (2) Gamma spectrum Four times 350 cc per season Fish (2) Gamma spectrum Quarterly (1) 350 cc Annually (2) Sediments (6) Gamma spectrum Semiannually 120 ml Milk (2) Gamma spectrum Monthly (3) 4,000 ml Sr-89,90 Monthly (3) 10,2 pCi/l I-131 All samples 1.5 pCi/1 Cranberries (3) Gamma spectrum At harvest 350 cc Vegetables (2) Gamma spectrum At harvest 350 cc Deef Forage (2) Gamma spectrum Annually 350 cc

Actual number of samples usually exceeds required number.
- Required by technical specifications, actual standards are at required 1cvels or better.

--See Table II-7b 15

y t its vnig ) hiesk c ) d gtmy/ ( ( iiili 0 0 0 0 0 5 HsdaC 5 5 5 5 5 2 nenp 1 eSA S y t i s vli g ) 7 hiesk ) 7 gt sy/ c ) d 9 iisli ( ( 1 HsuaC 5 5 5 5 5 nMnp 1 e A S 9 1 L l ) I k/ b R li ( iC 5 P MP 0 2 5 5 A 1 1 1 1 R E T s F d A ig lk o/ 0 0 0 0 0 0 E Si 6 2 6 2 5 5 V C 1 1 1 1 I yp r T l D e C v b E e 7 F l F s e I E d c I ( ig n lk s e o/ I e d E S Si 0 0 0 0 0 8 0 0 l i L E C 3 6 3 6 4 8 8 b f B I tp 1 2 1 2 a n A T e t o W e c T I g V e 2 I v5 T 9 e y I t f e S ea 2 2 2 a h N nl s3 e t E ruaM 0 0 0 0 l ocG/ 1 1 1 1 t S bi i n a rtrC x x x x e M irop e r U Aa 1 2 7 1 r o P g r M r I f e N o I rl M s 5 e/ 2 0 5 0 5 0 0 2 0 5 5 i 2 ti 3 1 3 1 3 1 1 1 1 s D aC 3 y h E Wp l t R a i n w I a U y Q 0 o t y y 4 t i l l ER 2, v n n s i o o a 7 9 e t t 3 0 3 i i 0 5 s e 0 5 4 l s 6 9 1, 2, 1 p n - - i b 6, 9 s 4 4 8 p e o r y s 4 9 8 5 9 0 b 1 3 a 4 3 A S C Z l s 5 5 5 6 8 9 N 3 1 L 1 2 a o 3 - - - - - - /1 - / - - ) ) ) ) n r - n e o n r r r - s a e u a b c d A G H M F C 2 S S Z I C B C P ( ( ( (

III. MONITORING DATA AND RESULTS Radioactivity is measured in environmental samples by detection of characteristic beta and gamma activity, and by radiochemical sep-aration. These measurements are collected in a data base file for com-puter analysis using a code, ERMAP ERMAP calculates a set of statistical parameters for each radionuclides whose concentration is reported in a given environmental n.edium. This set of statistical parameters includes separate analyses for (1) the indicator stations, (2) the control stations, and (3) the station having the highest annual mean concentration. For each of these three groups of data, ERMAP calculates 1) the mean value of positive concentrations (i.e., concentra-tions greater than the LLD (lower limit of detection)); 2) the square root of the mean square deviation. This is an estimate of the sample variance. If only one positive measurement exists, ERMAP reports the standard counting error as an estimate of variance. 3) the lowest and highest positive concentrations; 4) the number of positive measurements divided by the total number of measurements; 5) the probability, P, that the positive measurements are due to random occurrences of false positive errors. ERMAP assumes that the probability of an individual false positive 17

1 measurement is 0.05; values of P are rounded and expressed in percent. Hence, the statement P=0 in ERMAP's output indicates tha t P is less than 0.49%. If no measurement above minimum sensitivity were encountered during the reporting period, LLD is printed in the appropriate column. Entries listed under the heading LLD are the mean of all LLD values, where each LLL equals 3.29 times the standard error of the associated measurement. A. TERRESTRIAL ENVIRONMENT Radioactivity in the terrestrial environment is found as a result of deposition of airborne particulate and gaseous isotopes upon the earth's surface which eventually may be detected in vegeta-tion, milk from grazing animals, and'in the air itself. Fallout from nuclear weapons testing will contribute to radioactivity in the terrestrial environment as airborne fission products travel over the earth. Comparison of relative concentration of various isotopes in PNPS gaseous effluents and in environmental samples serve to identify cases where nuclear plant releases are a significant source of these environmental radioactivity. 1. AIR PARTICULATE Airborne radioactivity was measured at eleven air sampling stations located near PNPS (with one control station 23 miles away at East Weymouth, see Figure II-1). Cellulose disc filters trap particulate before air is pumped through charcoal-filters which trap gaseous iodine. Weekly measurements of I-131 18

TABLE III~A-1 ISOTOPIC CONCENTRATIONS IN AIR PARTICULATE P!LGH!n i UF F SITE Ekv!Ruh>ENT AL # ADIOLOGIC AL MONITON!hG 03/16/78 PAGE 4 Svamany FDR TMg PERIOD 12/30/76 12/31/77 = MEDlume AlH PARTICULA 1E FILTER 8 UNIT 81 PCl/CU. M ANALY8E8 L0aER LIMIT INDICATON STAfj0N$ Hj$ NEAT STATION PEAN CONTROL LOCATIONS (TOTAL huanER) 07 DEfECf!ON

FAh,Rahbt.Aho MEAN. RANGE.AND mEAN,RANGEeahD (h0hekOUfthEle (LLD)

Nu, OETECTEDee h0. DEfECTE0** NC DETECTE0ne e....e....eeeeeee. GR.A (175) 63 (3.e a 7)E 0 P8 (8.0 & 3.0)E O (3.5 a 3.5)E o l ( 0) (u.7 = 3290.0)E =3 (1.7

800.0)E =2 (1.4 700.0)E 2

=

(

13/159)e (Ps il e( t/ 16)e (Ps 37) et 2/ 16)e (Ps 14) GR=8 (579) 11 (1.3 A ,o)E.1 OA (1.5 a 2)E =1 (i.e & 1)E *1 1 ( 9) (u.3 23.01E =2 (n.1 825.0)E.3 (1.1 = 79.1)E =2 (3.6 47.2)E =2 = = l

(515/526)e (Ps 0) et 53/ 53)e (Ps 0)
( 52/ $3)e (Ps 0)

GRaG ( es) 3.9 (A.3 A 4)E 0 mR (9.7 a 1.3)E o (8.3 4 1.7)E O ( 0) (3.3 = u.9)E o (5.0 14.0)E O (7.0 = 3/e's)lt.0)E o (5.0 = 10.0)E O

(

2a/ sole (Ps 0) et (Ps 0) et 3/ 4)e (Ps 0) !=131 (191) .22 (2.4 A 2)E =2 PL (3.8 & t.e)E =2 (1.3 a 1.3)E =2 ( 0) (2.1 658.0)E *2 (1.2 = e.0)E =2 (0.0

2.5)E =2

=

(

dt/173)e (Ps 0) et t/ 17)e (Ps 37) et 2/ 18)e (Ps 16) BE=? ( 70) e.70E*u2 (9.5 A 9)E =2 as (i.e a .5)E at (1.1 & 2)E =1 ( n) (8.9 19.lJE =2 (5.0 25.0)E a2 (6.0 ts.0)E =2 = = = et 26/ 64)* (Ps 0) e( 1/ 6)e (Po 23) e( 3/ 6)* (Ps 0) Maso ( es) 11 (3.2 & 61E =2 E8 (5.5 & 2.3)E +2 LLD ( U) (1.5 = 23.0)E */ (1.3

F.9)t 2

(3.2 = 7.9)E.2

(

11/ e5)* (Fs 0) a( 2/ 5)* (Ps 29 MN=54 ( up) n.5eE=03 (3.3 A 5)E.3 E6 (3.8 a 7)E =3 LLD ( 0) (1.1 = la.8)E =3 (2.9

3.8)E al et 2/ so). (Ps 27)
(

1/ 5)e (Ps 20) Cuete ( 71) 7.52t=03 LLD LLp LLD ( 0) (3.3 = 21.4)E =3 FE=50 ( 27) t.ulE=u2 LLD LLD LLD ( 0) (1.0 8.9)F =2 = e WN.dbollht kEFENS TU TME hbM ER OF SEPANAff *EASUREMEN18 eMICh eERE GREATEN TMah fth (10) TiptS THE AvtRAGf RACMGNOUND 70W THE PEMIUD OF 1>t HEPORT e. YmE FWat110h DF 3A*PLE ANALY8E8 Y!ELDING DETECTABLE PEA 5uREMEN18 (1.E. >LLD) 18 laDICATED alfelm *( Aht )e. ThE PMDBA81LI1Y,P. THAT DETECTABLE MEAsukEMENf8 WEsoL1 PkOM wahnua F AL 6E Pn51 TivE ENNUW$ j $ PWjNI(y g(QqQ$]Qg }h PgRG[NT. 19

TABLE III-A-1 (Cont) P!L4Wla 1 O* F S I T E ENviddkmt'NTAL wa010 LOGICAL m0Ntf0NING v3/16/78 PAGE 5 12/31/77 SvadAkV Fue 1mf PEPIOD 12/30/76 >E0luas alw PAki1CULa1E FILTEn8 UNIfSt PCI/CO. M AN AL Y SE 8 LbeFw L!all INv!CainW STATIONS MIGNE8T Sfai!DN MEaN CUNTROL LOCATION 8 (10146 NtapEh) OF OFTEcflow mEaN,*aNGr.ANo .EAN, RANGE.aNo mEaN. RANGE.AND (NON*wouftvE)* (LLL) OETECTEo** hu OETECTE0*e NO. DETECTEDee ....e........ .............e.... CO.60 ( 71) 6.62E.03 (5.5 a 1.01E.3 CR (7.2 & !.2)E 3 LLD 165.0)E .4 (3.3 8.3)E.3 ( 0) (9.9 =

(

5/ 65)e (Ps it) a( g/ 7)* (Ps 25) ZN.65 ( uo) 1.enE.02 LLU LLD LLO ( 0) (2.7 32.9)E.5 a ZR 95 ( 59) 1.79t.02 (2.2 a .elt.2 OA (3.9 A 5)E.2 (1.6 & 4.0)E.2 32.9)E =3 (7.2 46.2)E 3 ( 0) (5.9 et IT/ Skle (Ps 0) et 1/ 6)* (Ps 23) et 1/ 5)e (Ps 20) Ru.103 ( 55) 1.55E=02 (2.2 a 51E.2 *S (3.8 A 3)E.2 LLO ( 0) (4.9 3.6)E.2 luB.0)E.3 (1.0 = e( 5/ %))e (Ps 6) a( 3/ 6)e (Ps 23) RU.106 ( 27) 3.07E.02 (1.9 A 4)E.2 Ep (3.0 A 6)E 2 LLD ( 9) (1.5 12.3)E =2 ( 1. 3

3.01E 2
(

e/ 25)e (km 2) et 1/ 3)* (Ps 13) CS*134 ( 95) .23 (5.0 & 0.0)E.1 ER (5.0 a 3.0)E =1 LLO ( n) (1.u. 656.0)E.3

(

2/ e5)* (ks 12) et 1/ ele (Ps 27) C8 137 (115) 30 (let A 7)E.1 3 (e 0 & 4.0)E.1 (2.7 & 2.7)E =l ( 0) (1.3 - 967.0)E.3 (1.a

600.9)E *3 (3.0 800.0)E.3 (2.2 800.0)E.3 et 15/105). (Ps 0) et 2/ 10). (Ps 7) e( 3/ 10). (ps 1)

CE.lal ( 27) 2.70E*02 (6.5

6)E.2 CW (7.7 A 1.1)E.2 LLO

( 9) (1.2 9.4)E =2 (a.3 = 7.7)E.2

(

5/ 25)e (Ps 0) et 1/ 3)e (Ps 13) CE.144 ( 27) 1.SeE.03 (3.0 & 3)E =2 PC (3.0 & 3)E.2 LLO ( l) (e.4 e3.8)E =6 et 1/ 25)* (Ps 36) et 1/ 3)e (Ps $3) e NON NDUTINE NEF E N S TO THE NumBE R OF BEPARATE

MEASUREMENTS eM)(N W[R[ GREATEh THAN TEN (80) TI.E8 THE AVERAGE BACMGWOUND FOR TME PEN 100 0F TME NEPORT se TME F NACTION OF 8 APPLE ANALV8t3 YttLDING DETECTABLE mea 89REMENT8 (1.E. >LLD) IE INDICATED m! THIN et 6%D 1*.

THE PROSABILITYeP. THAT DETECTABLE MEA 8UREMENTS NE8vLI FNO. haNQU. Fa($E POS1TjvE EWNONS IS PRjNTED ALONG$10E IN PERCENT. 20

in the charcoal filters and of gross beta activities in the air filters provide a general indication of significant activity levels. l Table III-A-1 shows average concentration of air particulate samples at indicator stations and the station with the highest mean for the year. (Changes in technical specifications eliminated gross gamma and I-131 measurements after April 19, 1977.) The highest mean concentrations were found at various locations, CR, OA, MS, EB, ER, WS, PC and in every case were not significantly distinguishable from the background station measurement. For several isotopes, only one measurement was above lower limit of detection (LLD) at the station of highest mean, with correspondingly large (13 to 37%) probabilities that these measurements are spurious; i.e., resulting from an " accidental" count arising from instrument noise or background activity randomly appearing in the channel (energy) being measured. Figure III-A-la shows weekly airb'orne particulate gross 4 beta activity for the year, for all indicator stations and Figure d III-A-lb, for the background (control) station. An indicator of overall airborne radioactivity, these graphs demonstrate the contribution from atmospheric fallout, in particular, the debris from the Chinese weapons test of September 1977. The foreground and background stations all show large peaks at the end of September; lesser peaks in late May, early July, mid April and early May. The major activity peak in late September is quite clearly the result of atmospheric fallout as shown by the variation in concentration levels among stations; readings were higher at Cleft Rock, Overlook Area, Manomet 21

g n u XY .C i .E

nD B S g P W n. i nV N N iO O O uN I I T T g T A A u O T T n. L S S s T P e nC t uO E + + a g H = = l Mn. T u R R c .P F O W i nE O t S o N N r g E O O a) G I I P7 n. N T T 7 nG A A A r9 U R T T i 1 A S S A - n E g s i H s T X A nn i o nY = = L E i oU D yt nJ T N t a I a 7 M S i h g 7 S i t i 9 T vS N N n U i ,k .E 1 O O N O t r .l inU co I I T T J S u A A At g R T T a n i E S S ac n B ti uY M ed U X E Bn l j nAM N = = I o g Y s B i n T R L sl E P ol R u. I G R V rA nP N N G( I nA T O O i I I g CA T T n. A A a .R E T T l n.A T S S M A n A C M0 g I n

I D I n. N I iB I R C oE C P I F n S e M g E N N r

n..

U O O u I R L I I g G

i. N A T T i

L nA V A A F .J T T I P . : : _ ~ - ~ : . : i - ~ :_ Z S S 0 1 1 1 1 0 0 0 0 0 + E E E E E 0 0 0 0 0 0 0 0 0 0 1 8 6 4 2 0 EE tj

g ,u C ,ED n ,n. aV nO N o g T O n. L .T P uC O n E g H T i n. .P F nE O S n g E G n N u. A G nU R i R n T n E g H ,Y oL E nU D J I S o 7 R g 7 S E 9 T T uE U 1 L nN D nU I F. u R J S P. B g E u R M nY U nA N M u B g Y n T I R u. G R V nP I i A T u g C R o. nR E nA T M A u C E g I D = n. N uB I W nE E I F u S M g E N n U O I R n. L I % mJ G N A T L oA V R I T P Z S - - _____~ 5_:.__ 0 1 1 1 1 0 0 0 0 0 + E E E E E 0 0 0 0 0 0 0 0 0 0 1 8 6 4 2 0 cawt'ai 8 s Ga. ca uw

. g% 3 MONTHG .MONTHG y .10 PREOPERATIONAL g OPERATIONAL MONTHG ) & GRM8 @ I & LE88 T03 i . LE. m ~ -l \\ I 1 V -f - A 1.. I n A' & &[ i i E e C1 A i . j q, o l A l C A l - A ) I .A l.. .L. q,. I d i, A&& g& 16 .ii,, l <l A a eg A i g i !L ! 8Al I A 1 A 1 A ! A'I A 1 A 1 Al d t ot t 8 8 I i 1 8 1 1 I E I I l __l 1 t ) I i IAI t IAI 'M A M J'J A 5 0 N D J F M A 'ni J J A 5 O N D J & M A M J J A 6 O N D J F M A h 1970 1975 1972 45 3 MONTO MONTQ t0 g MONTD 0 ORD PREOPERATIONAL s l OPERAfl0NA A- = .L... ,i - qi l 3 o o i ~ I ii g i,, g o i! 9 ,[ ti i t g AA y< } i A d, 0.1 A A <iii W A g g A ,) i R 1 l a ie 4 g. - 4 l .k .7o l, o o

s. 2 4%.

A A& A AA Avanable On %perture Card Figure III-A-lc. Gross:B3 ~.

P HsGM - 'AWEMAGE A f fA , to. ie"d' aA _,,,a, OVERLOOK AREA (OA) )0.08 fannism31 ~ % 0.02 icom/m3) ~ P q, i ,if f' T o o 6 I i) 4' f) ~ gj (). i i = o o. . i b. 1> I I, .. 3 jI. .e o..j. I II l o a o o o. il 16 g \\> It db q, AA A L6talplAI.'lalA 8 1 1 I I IAlalAIAIAl Al I f f IARAtA1Al IAfA AI AE AI AI'A'AIA'*I^IA AIAIAIAI I I I I I I 00f a J u W- ( es b J F M A M J J A 5 0 h D J F M A M J J A 5 ON D J P M A M J J A 8 D N D J F M A M J J A & O N D l 9073 1974 1975 1978 1977 .Y HIGH GHO58 ,YavtRaGE = BE f A r' ' " EAST WEYMOUTH (EW) t0 hMMA kgan/m3 6 = bN 0 06 tepnum3 ~ 1 i QN 0 02 isemim3) ..T }.I { o X.. . o n o lp I. 0i p 1 I' d, { .j 1 .I J. $1 ,I I. .I l' 1_.. - n I o, i .r f o a .) ir f a 1 k a. o 4 6 ,.._.....i, ..,A,......u.................u., ............ i. m,, A 8 D N D J F M A M A B O N O J f. M A M J J A 5 0 I .J J A 8 0 N 13 J tM AM J J A 8OND JF M A M ..,3 im J r.J J.,J i i. .. n l ha Activity in Air Particulate (1970-1977) ) 770f3l06 % -o( j a 24' i d

t h

and Plymouth Center, than at East Weymouth, the control station. The activity at East Weymouth is higher than that at several onsite stations; for example, Warehouse, Pedestrian Bridge and two property line locations. These activity peaks are important because they correspond to high activity levels in particular isotopes in other media at the same time of occurrence. The close agreement in varia-tion with time of the concentrations of gross beta activity among all the air sampling stations, is the most compelling evidence not only for the existence of the effects of weapons test related fallout, but-of its magnitude compared to that of other sources during 1977. Figure III-A-lc shows gross beta activity since 1970, giving a long term perspective on recent activity levels. 2. GASEOUS IODINE Charcoal filters were used to measure gaseous Iodine-131 in air. As shown in Table III-A-2, fewer than one fourth of indicator stations displayed measurable concentrations, with measure-ments ranging over a factor of 10, both at the station with the highest mean (PB) and at the control station. Nevertheless, there is a small observed activity above background at the 95% confidence level at station PB. This average activity itself, however, results i in a dose of only one (1) mrem to the thyroid of an adult if inhaled l l at this concentration for an entire year. l 3. FOOD CROPS (CRANBERRIES, TABLE III-A-3) l Cranberries are analyzed once each year at harvest, 1 which occurs in early fall. The radioactivity analyses are treated 25
separately from those for other crops because cranberries are a significant commercial crop, unlike other edible vegetation which is for private or local small scale distribution. Cranberry samples were taken in 1977 at harvest which followed by a few weeks the weapons test in late September. Consequently, activity levels characteristic of fresh fallout were found in cranberry samples. Because activities of certain isotopes were ten times LLD of the control station sample, the measurements were reported to the NRC as anomalous. A more complete discussion of the results is in Section IV. Observations of significant uptake of cesium in cranberries during 1976 were discussed in Supplement to PNPS Environ-3) mental Report No. 9, issued July 31, 1977 A field survey of ] cranberry bogs and nearby soil is planned for mid 1978 to determine with greater confidence the sources of the observed radionuclides. 4. GARDEN CROPS (Table III-A-4) Lettuce, corn, onions, and potatoes were sampled at two farms in August and swiss chard from a garden in October. The samples taken at the garden (SE) near the PNPS showed the highest l levels of all fission related isotopes, because this sampling 1 occurred just after the weapons test in September. The relatively high Cs-137 compared to Cs-134, the lack of observed Co-60 l coupled with the near-coincidence in time of the sampling and j the weapons test verify that the latter event is the likely cause of the observed activities. Comparison of the relative 1 Cs-137/Cs-134 concentrations observed in this sample i 26
i 1 l l TABLE III-A-4 -l ISOTOPIC CONCENTRATIONS-IN GARDEN CROPS '] i i v!LGR!a 1 0FFSIlt ENv!RUNaENTAL RADIOLOGICAL MONITONING 03/16/78 PAGE 11 SuraAaV FUW TMg PERIOD 12/30/76 12/31/77 i MEDIUM: F000/GA4 DEN CROPS UNIf8s PC1/Gm WET ANALYSES L0aER LIMIT {NQICATOR STATION $ H]GME8f 87Ai!ON MEAN CONTROL LOCATIONS (TOTAL NUMBEW) 0F DE1ECf!ON MEAN. RANGE.AND MEANeRANGE,AND MEAN, RANGE,AND (NON. ROUTINE)* (LLD) No. DETECTEcom N0. DETECTEDee NO. DETECTED ** e............ I !*131 ( 5) 1.36E.02 (a.9 a 9)E =2 SE (4,9 A 9)E *2 LLD. ( 0) .(6.6 = 23.0)E.3
(
t/ lie (Ps 13).
(.
l/ 1)e (Ps 5) i BE=7 ( 11 20 (1.0 A 5)E.i CF (1.0 a 5)E.1 LLD ( 0) j e( 1/ 1)e (Ps 5)
(
1/ 1)e (Ps 5). 6)E O 4 n no ( g) .50 (2.3 & 9)g. 0 SE (5.4 * .2)E o (2.8 & . 4,0)E .0 ( a) (3.7 = 54.01E =1 (2.0
(
5/ 5). (Ps-o) et 1/ 1)e (Ps 5) e(. 3/ 3)e (Ps 0)- MN*5u ( A) e.83E=03 LLD LLD LLD ( ol (a.9 13.2)E.3 CO*58 ( 8) 8.85E=03 LLD LLD LLD ( 0) (4.9. la.8)E.3 FE=59 ( n) 2.076 02 LLD LLD LLD ( 0) (1.5 3.3)f *2 CO.60 ( 8) 8.64E.03 LLD LLD LLD 13.2)E.3 ( 9) (a.9 ZN.65 ( 61 1.43E.92 LLD LLp LLD ( ul (9.4 32.9)E =) 29-95 ( 31 1.15t*97 (1.0 A t.1)E *1 SE (2.5 a .2)E =t LLD ( t) (2.1 25.01E.2 et P/ 2)e (Ps o)
(
1/ 1)e (Ps-5) a N0howhullht NtFENs 10 int nuatiEw nF 8EP AN ATE *E A80REMENTS =M ACH *Ewt GREATER Icam TF N (101 flat 5 l>E AbENAGt HACKGROUNb FOR THE pew!UD OF TML NEPudt se thE FkACTION OF Saa*Le ANALV8f8 Y1ELDING Di'ECTABLE mEaspetaENTS (1.E. >L Lii) 18 TNn!CatE0 a1 THIN et AND ). THE Pwo8 ABILITY,P, THAT DETECTABLE MEA 8UR[MgNT8 WF3vLT FNUM WANQUd FatSE Pn51TIVE ENROWS IS PWINTED ALONWSIDE IN PERCENT. ) i '27 l i
I 1 TABLE III-A-4 (Cont) I 1 l PI L t.R I M 1 UA F 81 T F FNv1Not> ENTAL WADIPLOGICAL auN!inRING 03/16/78 PAGE 12 Sua*Awv FUW TME PER109 12/30/7e 12/31/77
EDIUM FOOD /GAwpEN CWop8 UNIT 83 PC1/GM.ET I
ANALYSES L0aEN LIMIT IN0!CATOR STAT 10NS MIGML8T STATION aEAN CON {ROL LUCATIONS (Tuf AL Nua8Ew) DF DE IE C 11(sN etAN.WANGE,ANO MLANekANGEeANU MEAm RANGEeAND.. e (Nors Ruuf!NE)* (LLu) t>0. DETEC1Euee hu. DtIECTE0e* NO. DETECTE0** I q RU.103 ( 2) 4.94E.03 (A.2
9)E.2 SE (6.2 a 9)F'=2 LLO J
( I) et 1/ 1)* (>s 5) e( 1/ 1). (ps-b) C8=134 ( nl 9.26E.03 LLO LLu LLO ( 0) (4.9 14.#)E.3 C8 137 ( 8) 8.23E.03 (9.3 A e.8)E.2 SE. (1.8 A 8)E.1 LLO ( 1) (4.9 13.2)E.3 (5.0
1Ao.01E =3

(
2/ 5). (ps 2) a( t/ 1)e (Ps 5) BA 140 ( 2) 2.30E.02 (2.t A 4)E.1 SE (2.1 A 4)E.1 LLO ( 0) et 1/ 1)e (Ps 5)
(
1/ 1)e (ps 5) i l l NON.wDV11NE WEFER8 TO TML NUr8ER OF SEPARATE MEA 8UREMENTS WHjcM MERE GNEATEN I THAN IEN (to) fires THE AvEWAGE RACKGw0VND FSR THE PENIOD OF INE wtP0kT
fME FRACT]UN OF 8 AMPLE ANALV8E8 Y!ELDING DETECTABLE MEA 8uREMEN18 (1.E. >LLD) 18 INDICATED alTMik et AND )e. THE PROBABILITYeP, TMAT DETECTABLE MEASUREMENT 8
) Nt80LT FROM RANODa FALSE POSITIVE EnROR8 IS PRINTED ALUNG8IDE IN PERCENT. I 1 f k i t 28
11 l i .1 1 j (20:1) to that of gaseous effluents (.3. 6 : 1) further shows that the l l PNPS is not a significant source of the radioactivity. 5. FORAGE (GROUND FEED) i Table III-A-5 shows that for beef forage (hay), the J l control station located at Whitman Farm, (see Figure II-3) 21 miles I distant, exhibited higher levels of Cs-137 than found at the nearby f 1 Plymouth County Farm. In addition, the absence of I-131 in hay l l l (measured within 10 days of collection), whereas it exists in PNPS gaseous effluents at levels several orders of magnitude greater than those of isotopes found in the samples, confirms that the source of the radioactivity is not PNPS. 6. MILK Milk is an important medium to monitor for radio-isotopes because it manifests the biological accumulation of the food chain steps in its production, and it is potentially the most sig-l nificant source of iodine to the thyroid of an infant (or child) consuming it. Milk is an important source of strontium 89 and 90 and is the only medium in which these two isotopes are sought fol-lowing the technical specification revision of April 19, 1977. Table III-A-6 shows that the station with the maximum average concentration of various isotopes is a control station (BF, WF) located 20 miles from PNPS, except for Sr-90 which has.a maxi-i mum mean concentration at Plymouth County Farm, the foreground sta-l tion. Strontium 89, however, is maximum for the year at Bridgewater Farm, a control station shown on Figure II-3. The average measured 29
l 1 1 TABLE III-A-5 i i I ISOTOPIC CONCENTRATIONS IN FORAGE 1 l + PILGR!m 1 0FF81TE E Nv!RUNMENT AL R ADIOLOGIC AL MONITORING 03/16/T8 PAGE il SummANT FOR TME PERIOD 12/30/T6. 12/31/TT Ml010Mt FEED + FORAGE GROUND FEED UNIT 4s PCI/GM WET ] ANALYSE 8 loner LIMIT INDICATOR STATIONS MIGHEET STATION MEAN CONTROL LOCATIONS l (TOTAL Num8ER) 0F DETECTION mEAN, RANGE,AND mEAN, RANGE.AND MEAheRANGE,AhD (NON. ROUTINE)e-(LLU) NU. DETECTEDe* .N0. DETECTEDen NO. DETECTEDe* !=131 ( 1) 3.30E.02 LLO LLD -LLO ( 0) I l BE.T ( t) .20 LLD
F (2.6 A
.2)E O (2.6 & 2)E O d ( 0) J et t/ )e (Ps 5) et 1/ 1)* (Pm 5) x.a0 ( 2) .50 (5.T A 3)E o pF ( 1. 4 4 - .1)E 1 (1.1 4 1)E 4 'i ( 0) 1 e( 1/ 1)e (Pm 5) e( 1/ 1)e (Ps 5) et 3/ ). (Ps 5) l I NN.54 ( 2) 2.56E.02 LLD LLD LLD J ( 0) (1.6 = 3.1)E =2 C0 58 ( 2) 2.64E.02 LLD LLD LLD ( 0) (2.0 3.3)E.2 i = FE.59 ( 2) s.92E.02 LLD LLD LLD ( 0) (4.6 4.9)E.2 I CO.60 ( 2) 2.T2E=02 LLD LLD LLD ( 0) (2.1 3.3)E 2 l ZN.65 ( 2) s.95E.02 LLD llc LLD ') ( n) (3.3 6.61E.2 IR.95 ( 2) 4.00E.02 ff.2 & 4)E.I CF (2.2 a 4)E.1 (2.1 & 5)E.1 ( o) .( 3/ 1). (as 5)
(
1/ gje (Ps 5) et 1/ g). (Ps 5) nun.wou11NF wtpEw8 fu TME mumHER OF SEPAR ATE =E A8uME*ENT8 aHICM PERE GREATEN e inaN TEN (10) T!aES TME AvtwAGE paCMGRuuho FUd THE PERIUD OF THE NEPORT i se INE fMACT]DN OF SAMPLE ANALVSf3 Y!EL0 LNG DETECTABLE aEA8uREaENTS l (1.E. >LLO) IS inn!CA1ED *tTMIN a( AND le. THE PROBAulL11YePe THAT DETECIABLE MEASUREMENT Nf5 ULT Fwum wsNnua FaL8E S081TivE Ewa048 15 ppINTED ALONGSIDE IN PERCENT. ) i 'l 1 30 j !L__
9 c' .,i.
//
f. 4 s ~ TABLE III-A-5 (. Cont) / ( plLGwim 1 - UFF at it EN vlwu'4Mt a f AL N A DinLOGIC AL MONI TONING v3/16/78 PAGE 14 ], SuaMAwv Fup fME MEwinD 12/10/7e 12/31/77 MEDIUMt FEED e FORAGE GWuuND FEED UNIT 88 PC3/GM WET ro i ANALYSES L0aEN LIMIT INDICATOR STATIUNS MIGME8T Stat!UN MfAN CDNTNUL LOCATIONS (101AL abMMEk) UF DFTEC110N MEAN, RANGE,AND MEAN,4ANGE.AND . MEANeRANGE,AND (NON.wOu11NE)* (LLu) NU. DETECTEven mu. DEfEC1EDe* NU. DLTECTEDe* \\' A' y RV.103 ( 2) 2.coE.02 (8.0 a 2.0)E.2 CP (8.0 a 2.0)E *2 (5.0 & 2.0)E.2 e,>.' ( v) ~ et l/ 1)e (Ps 5)
(
1/ 13e (Ps 5) *( 1/ 1)e (Pe 5) ( \\ CS.134 ( 2) 2.72E.02 LLD LLD . LLD ( 0) (2.1 3.3)E =2
(
] CS.137 ( 21 2.coE.uk (e.6 A 1.u)E.2.F (2.3 A 3)E al (2.3 & 3)E.1 l 1 ( u) l
(
t/ 11e (Ps 5) et 1/ 1)e (Ps 5) *( 1/ 1). (Ps 5) l l ) / .J l l e N0=.Noulikt NEFENS 70 THE NUMRER OF SEP AN ATE ME A8uwf MENTS eMICH *ENE GWEATER TMAN TEN (19) 11MES THE AVEN AGE B ACKGROUND FUN THE PENIUD OF THE NEPUNT en TME FNACTION OF 8 AMPLE ANALV8ES Y! ELD lNG DETECTABLE MEASUREMENT $ (f.E. >LLD) !$ INUICATED n!TMIN a( AND le. TME PMOSABILITY,Pe thAT DETECTABLE MEASUkEMgNT8 WE8 ULT FMUM HANDUM FALSE PUSIT!vE E*NNUN8 18 PWINTED ALUNGAIDE IN PERCE NT. - l 1 i l 1 2 L J t 31
1 .T'- T - .l l .. % ~; -) ?tf .m g 3 l g, , 4 *cii . 1' !\\.N. ) 4 g IfN TABLE III-A-6 I p' ' ', L i ,3' ISOTOPIC CONCENTRATIONS IN MILK 3 .g ,a-4-y e l i $,#1LGNIM 1 'UFF811E Je*VIRUN> ENTAL NADIOLOGl*)L MUNITORJhG 03/16/78 PAGE 17 4 SumMAWT flin THE PEH100 12/33/76 12/31/77 = MEDIUMS M C 3 o UN!189 PCI/ LITER s ANALYS12
LOaEN LIMIT (ADICATOR STATIONS MtGHE87 STATION MEAN C0h f ROL LOC ATION$ ~
(TOTAL humw4W) 0F,DETECf10N jerAN.RANGF. ann =EAh. RANGE.AhD mCAm rah 6E.AND e .' s ; (NON*ROLiT!st )* (LLU) t' NO. CETEc1 Epee =U. OETECTtDe* kO. OETECTED*e 9 SR*89 ( 2a) 3.4 (3.R A 6)E. O RF (6.2 A a.5)E ' 0 (a.s a 1.7)E O '( 0) (6.2 = eh.01E =l (i.e = . 5.0)E 0 (1.7 + 10.7)E 0 (1.0
10.7)E 0 i
e( 5/ 32)e (Ps 0)
(
2/ 7)e (Ps a) e( 5/ 12)e (Ps 0) i i ^*- 8R.90 ( 24) 40 (5.8 a 7)E o CF (5.6 a ( ol' .(s.7
9.6)E O
(1.7 * . 7)E o (2.6 & -.3)E 0 k 9.6)E 0- (1.1 = 0.5)E O '
(
12/ 12) e (Ps 0)
( 12/ 12)e (Ps 0) et 12/ 12)e (Ps 0)-
,1 !=131 ( ee) i.1 (6.3 a 4.2)E 0 aF '(6.7 A' 4.2)E. U (4.7 & 2.6)E. 0 ( v2, (1,2 be.2)E al, (1.6 390.V,'f at (2.6 131.0)E at (2.6 = 131.0)E *1 = =
(
9/ 22)e (km 0)
(
3/ 12)e (Ps t} et 6/ 22)s (Ps 0)' j BE=7 ( 7) 22 \\ 0,0 LLO LLO (
.v.f (1,5 -
2.8)E 1 j ', 2.09E*02 ( 1. 2.4 s.0)E 3 0F (1.5& 01E 3 (1.2 & 0)E 3 j ti'l
a0
( ik) ( (6.5
13.5)E 2 (1.2 =
1.1)E 3 (8.9
13.8)E 2-
]
(. e/ 9)e (Ps c) et 3/
3)* (Ps 0).e( 9/ 9)e (Pm 0). q MN=58 4 7) 2.4 LLO LLD LLO d ( n) (i.e. 3.0)E 0 J 3 i l a \\ 2.5 LLD LLO CO*ta ( ?) g LLu 4 ( 0) (Je7 i 3.3)E o s FE=S9 ( 7J 5.8 LLO LLu LLO ( 0) (3.6 7.5)E o , p.oo ( e) 2.7 LLO LLD LLO s y ( 9) t i. 7 3.5)E o 4 1% .A he huwkusT(NE WEFERS fu THE NumREN 7/ $E P AW A TE *E A $URE k[N18 nHjCN DERE GWEATEN g ,,g 1 3 \\i 1aam TEN (10) 11dE8 THE AVENAGE 6AG G80VhD Fbd THt PER100 0F THE NEPOWT
~

e Tat FRAC 110N DF 8AMPLt AN ALY6ES fitLDING DETECT AplE ME a8vREMEh18 (1.E. >LLD) 18 1holC ATED *1 TH1= a t AND )*.
THE PerRABIL1tv.8 THAT DETEClaBLE MEASUWEPENIS Nt SULT F wum Naw00m F R 8d PtiSj f !)E t Wi8"W3 15 PWi%Tr J ALD4GSIDE 1h #ERCENT. r s x A 1 s 1 ..s ( x i \\ \\\\ ) n 3-
m. t.
i.\\ 1. \\ ,mw-3'2 l l l- - _ _ _ _ _. _ _ _ _ _ _ _ _ _ _ _ _. _ - _ _ _ _ _. _ - _ _ _ _ - J h i
1 i TABLE III-A-6. (Cont) i I PILGWIM I OFF81tt ENv!RUNMENTAL #AD10 LOGICAL =0NITORING 03/16/78 PAGE 18 ' 12/31/77 SumaANY FOR TME PERIDO 12/30/76 MEDIUMS MILK UNIT 8s PC1/ lifer ANALYSE 8 L0aER LIMIT INDICATUR STATIONS MIGHEST STATION MEAN CONTROL LOCAf!ONS (TOTAL NUMBER) 0F DETECTION. MEAN. RANGE.AND MEAN. RANGE.AND MSAN, RANGE,AND NU. OETEC1E0ee NQ. OETECTEDet .NU. DETECTED ** (NON.ROUTINt). (LLo) IN=65 ( 73 5.9 LLD LLD LLD ( 0) (3.8 7.7]E o IR.95 ( 7) 4.4 LLO LLO LLO ( u) (2.9 = 5.7)E O RU.103 ( 73 2.8 LLO LLD LLD ( 0) (1.9 1.6)E 0 RU.106 ( 73 22 LLO LLD LLD ( 0) (1.4 2.9)E. 1 C8 134 ( 17) 2.7 LLO LLD LLD ( 0) (1.5 4.9)E O C8 137 ( 25) 1.8 (6.R & 7)E o ar (7.8 a 1.1)E o (6.8 a 9)E o 11.2)t 0 (5.2 = 11.0)E o (2.8 13.3)E c ( 0) (3.7 et IP/ 12)* (Pa 0)
('
5/ 6). (Pa 0).( 12/ 1310 (Ps 0) 8A.140 ( 25) 9.9 (i.e a 9)E o 8F (2.5 & 7)E o (2.5 a 7)E o ( n) (1.2 18.1 ) t' o (9.0 00.0)E 1 =
(
3/ 12)e (ps )
(
1/ 7)e (as 25) *( 1/ 13)e (Ps.35) CE=141 ( 7) a.m LLO LLD LLD ( 0) (5.e. e.1)E o .i i CE. lee ( 73 2.3 LLu LLD LLD ( o) it.6 3.1)E o I l e NUN.WOu11NE kEFERS f u lat NU=aER OF SEPAWATE tA8uREMENf8 eMICM hENE GNEATER taaN TEN (10) times fME AvtNAGE MACMGROWND FOR Tet PERIUD OF TME NEPOdi' en 1 E Fwattlum 0F SaaPLE ANAL Y8ES Y!tLDING DE TECT ARLt PEA 8vaEME4f8 q (1.E. >LLO) 18 t a'JIC A TED ALTHIN et AND 19 fMF PdQ8ABIL11V,P, TMAY DE TECI AWLE *E ASUREMENf 8 I wEsuL1 Phua NANDu4 FatpE P08111vt EdwCN8 18 P*1NTED ALOW SIDE 16 PERCENT. J l L l 'W I 33 - _ _ _ -__ O
concentrations of Sr-89 and 90 are similar, whereas the environmental concentration ratio expected on the basis of station gaseous effluents in Sr-89/Sr-90 = 10. Because Sr-90 is a much longer lived isotope than Sr-89, most of the environmental concentration observed is therefore likely to be the result of accumulated atmospheric fallout. The observed Sr-89 may result from weapons test fallout, accounting for the increasing concentration (Figure III-A-2) after September.1977. For comparison, Figure V-B-1 shows decreasing concentrations of strontium in PNPS gaseous effluents after the second quarter of 1977. Strontium 90 in milk shows no temporal trend (Figure III-A-3) unlike the downward trend of PNPS effluents during the year. Iodine 131 (Figure III-A-4) in milk exhibits a significant maximum soon after the weapons test of September, both at Plymouth County Farm and at the control station (Whitman Farm). Because of significant variations in minimum detectable activity levels in the samples, the average mea-surable activity was maximum at Whitman Farm, although the peak value i at County Farm was higher. The coincidence of these peaks in time at I J the foreground and background locations is sufficient, however, to l point to the weapons test immediately prior to the measurement as the i i source of the activity. Finally, examination of Cs-137 activity in Figure ] a III-A-5 during the year shows peaks at the first of the year, possibly l I due to some earlier atmospheric test. During the rest of 1977, con-centrations varied with an early summer peak at the background station and a smaller peak in November at County Farm. None of these data a reflect the monotonic decreasing levels of PNPS emittcd Cs-137, and 34 1
i .C .E .D g . V . O . N g i T i O L nT P . C .. O E i H T .. P F . E O . S i E g G N . G A R . U . R E H T X . Y i L E ' i U D . J I 7 7 S 9 T U . E 1 . N O . U . J S g R E B . Y M U X . A N = . M 9 g 8 i Y T F R I S . R V . P I N T O . A C I g A T i . R E T . R T S . M A C g I D N . B I F . E I . F S M _5 i E N U O I R . N A T L I G R V R L . J I Z S P _ _ _ _ : ~ .: :_ ____~ 1 1 0 0 0 0 0 0 0 0 + + + + + E E E E E 0 0 0 0 0 5 2 0 0 0 1 1 9 S 3 0 xs ~ s oo a w* ,l l
g . C . E . D g .. V . O . N T g O L . T . C P .i O E H g T . P F . E O i S i g E G N . G A . U R g . R E H T .. Y . L E . U D . J I g 7 7 S [ . U 9 T . E 1 U . N O .. J S g R E B M . Y U . A N 0 .. M 9 Y g T R I S . R V .. P I T . A g C A . R E . A T . M A g C I D N .B uE I I . F S M U g E I R . N A L G . A V L . J I P Z 7:
__5___::
5____ 1 1 0 0 0 0 0 0 0 0 + + + + + E E E E E 5 0 0 0 0 2 0 5 0 5 1 1 7 5 2 0 a w ~ N o a_ w*
i. u .. C n . E , D g . V I . O .. N T g O i L n - i T P ii C . O i E n g T 1! H a F ..P .E O - rS i g EG N A rG i . U R . R g. E i H T X . Y . L -. U D F E =J 7 I 7 S v.U g 9 T U . E 1 . N O S AJ g R E B . Y M U X . A i M N = 3 1 Y j T F 1 I I . R V . P I N . R T O g C I R T . R E T . A T S M R g C I D N . B I . E I . F S M E N g I R U O L I G . N A T . R V L P . J I Z S - _ _ ____~ _ _ _ - : _ ~ ~ . _ _ _ _ _ _ 5_:___- 1 1 1 1 0 0 0 0 0 0 + + 9 + + E E E E 5 0 2 0 0 2 4 5 7 5 4 3 2 1 8 0 aws ]s oa w"
gn.
u. C
.E
n. D gn.
i nV nO N u T go. O n L T P nC u, O EH T .u. nP F nE 9 S u E g G u. N nG A k R l nUR i u E M g - H T X n nY = i nL E uU D F 7 J I n 7 W 3 7 S g 1 9 T N uE U 1 O s nN O I C nU T J S R u R T j E n. B 5 S M f] nY .R U X A 7 .M N = 3 n I Y I g 1 T F C I S n. I .R V uP I N e C A T O r n C I u \\_ g n A T g A i R E T F nA T S .M A C M j I
n..
D = N nB I F .E B I nF S g E N M U O I R L I G nN A T L uA V A nJ T I P Z S ~ - _ : : ~ _~ 1 1 0 0 0 0 0 0 0 0 + + + +- + E E E E E 0 0 0 0 0 5 2 0 0 0 1 1 9 6 3 0 eww
s o"-
w*
! % g, l 20 g + 2 STANDARD DEVIATIONS k MONTHLY VALUE < il -2 STANDARD DEVIATIONS l 15 I' 1,, I t-I k I Il f I g1 I i" I f I 1 1 s I I I E o E g I I I E fj g y i j g s n i PR EOPER ATION AL I l OPERATIONAL 1 = J 1 1 1 i e a a a e a n, i I a e i a a t i s, a a a 1 a a e a e ie a i a e a e 0 JJ A SONDJ FMAMJ J A S O ND J F MAMJ J A S O NDJ F MAMJ J A S O ND J Fl 1970 1971 1972 1973 4 STRONTIUM
I I
+ 2 ST ANDARD DEVIATIONS l MONTH LY V ALUE ~2 STANDARD DEVIATIONS a) m l g 5 <> l { j l-5 E y l 20 11 1'
ii 1
l i 8 kk j l1 I i f i hI r 1 10 g f PR EOPER ATION AL OPERATION AL n i l>>iiiiii,lii,i!ii,,il,iii,,,,,,,Ino 0 ., i i i i J J A SOND J F MAM J J A S OND J F MAMJ J A S O NDJ FMAMJ J A SO NDJ F. 1970 1971 1972 1973 CESIUM 137 . p,pyy 1 ~.".m. l TAPERTUIlli CARD Figure III-A-6. Concentrations; (Plymouth) 1976 EladXvallable On l
1perture Card
l ) I t> d> 11 5 I 10 I [' I I I II f I f f I g g I I II i III II II E 1 1 1,l1 l l l l l l l l l 1 0 i t i a a i a a a a a a a i i i e i i i i i e i iiiil I i 1 a .M A M J J A SON DJ F MAMJ J ASOND J F MAMJ J A S OIN D J F M A M J J A S O N D 1974 1975 1976 1977 e 40 i 30 l 20 ti II((((pi II I l 10 I,I I I I I ff }",,{I E I I gg I a a e i e a e e i i i I i i i i i i i iiif iiiI 1 1 1 I i i i l 1 i l 1 i l~ O
M A M J J A SON DJ F M MJ J A SON O J,F MAMJ J A'S O NID J F M A M.J J A S OiN D 1970 1975 1976 1977 i
l l 4 of Strontium-90 and Cesium-137 in Milk l-1977 E7 083 i coy T-o2. 39 l ~ ~~' s
i as a long lived isotope, instead reflect probably old atmospheric debris. For reference, activities of Cs-137 and Sr-90 in milk since before plant operation are shown in Figure III-A-6. l 7. DOMESTIC AND RECREATION WATER (SURFACE WATER) Fresh water sampling was discontinued on April 19, ~ 1 1977 as a result of changes in the technical specifications. Domestic l and recreational water (ponds, wells, etc.) are no longer measured because there is no pathway to freshwater sources for liquid releases from PNPS. Thus, the concentrations of several isotopes observed l to maximize at various surface water stations, both indicator and 1 l I control, are manifestations of naturally occurring radioactivity. Table III-A-7 summarizes isotopic concentrations found in surface l water and shows that stations with maximum activity vary among all stations sampled, and no reactor produced isotope was found above LLD. B. AQUATIC ENVIRONMENT PNPS is located on Cape Cod Bay and is a "once through" plant using seawater for cooling. Its liquid radioactive effluents may have an impact upon the aquatic environment. To detect any such possible impacts, a substantial surveillance program is conducted to monitor the seawater, marine life and sediments. The details of the program are given in Section II. 1. SEAWATER PNPS effluents discharged as liquids should be observed in the discharge canal where a continuous compositing sampler samples 40
.) TABLE III-A-7 ISOTOPIC CONCENTRATIONS IN SURFACE WATER HILGw!M ! 0FF811f FNvlR0h*ENIAL ka010 LOGICAL au=ITUw!NG 03/!6/78 PAGE 16 SummaHV 8 0s TM( Pt Risin 12/10/76 04/19/77 = ME01Ums asfEW 8UNPACE UNIT 8s PCI/ LITER = ANALYSEB LUaEN LIMIT INDICAT0fe STAT!DNS N'IGHE ST ST A TION MEAN CUNTROL LOCATIONS (TOTAL NuP8(k) 0F 0FTECTION MEAld.8ANGE,4ND. MEAN,WANGE.AND tEANeRANGE,AND (NON.R0uftst)e (LLu) MU. DtTEC1EDee NO. OETECTE0ee NO. OETECTE0a* GR=A ( 3a) 1.2 LLD SP (3.0 A 1.5)E o (3.0 a 1.5)E- 0 ( 0) (o.9 = 32.9)E =1 et t/ 3)e (Ps 13) et 1/ 6te (Ps 23) GN=8 ( lo) 56 (3.1 a 1.6)E o CW (5.0 & 3.5)E o (e.4 & l.3)E 0 ( 0) (e.v. 6.6)E =1 (6.0 - 85.0)E *1 (1.5 = 8.*:f 7 (2.0
9.7)E 0

(
4/ 6)e (Ps 0)
(
2/ 2). (Ps 0) *( 6/ 6)* (Ps 0) GR*G ( 10) 66 (0.6 & 2.6)L o Lh (9.3 a 5.4)E o (4.5 A 9)E O ( 0) (6.6 te.6)E =t (2.m. 20.1)E o (2.8 = 20.1)E o (3.5
6.4)E O
et T/ d)e (Ps 0)
(
3/ 3)* (Ps 0) e( 3/ 6)e (Ps 0) 8R 89 ( lu) ,85 (6.0 4 ).0)E.1 GP (7.5 & 5)E *1 (7.5 & 5)E at ( 0) (3,3 16.5)E -1 (7.0
8.0)E.1 (7.0 8.0)E.1

(
t/ m)e (Ps 27) et 2/ 3)* (Ps 0) e( g/ 6)e (Ps 3) 8R=90 ( 1a) 41 (7.0 a 3.0)E.1 M. (7.0 a 3.0)E =1 (6.0 a 2.0)E al ( 0) (2.5 = 8.2)E =1 e( 1/ 8)e (Ps 27) e( 3/ 3)e (Ps $3) e( 1/ 6)e (Ps 23) !*131 ( l') 8.0 LLD SP (2.1 A 1.1)E o (2.1 & t.1)E o ( 0) (6.6 132.0)E.3 = et 1/ e). (Ps 17) et 3/ ele (Ps 27) l Maso ( 5) 1.05E+02 LLO LLo LLO ( 0) (9.9 11.5)E i MN*5e ( 5) 6.9 LLD LLO LLD ( 0) (6.6 8.2)E o = s C0=58 ( 5) 6.9 LLO LLO tLD I ( 0) (6.6 8.2)E o = 1 e NON.MOUTIht REFERS TO THE NUMBER OF SEPANATE MEASUREMENTS WHICN MERE GREATER TMAw TEN (10) flaE8 TME AVERAGE mACucp0UND FOR TME PERIOD OF TME REPORT ee THE FDACTION OF 8 AMPLE ANALT8E8 TIELOING DETECT ABLE ME ASUREMENTO (1.E. >LLD) 18 !NDICATED s! THIN a( AND )*. TME PROBASILITv ke TMAT DETECTA8LE MEA 8U#EMENTS e hE80L1 FWOM NANDUM FAL8E POSIT!WE ERROR 8 18 PRINTED ALONG810E IN PERCENT, l l l l 41 I
TABLE III-A-7 (Cont) PILGwlp I 1FFSITE FNV!wouENTAL RADIOLOGICAL'M0h!TORING 03/16/T8 PAGE-17 Oe/19/ff $U"=ARY Fud INE PERIOD 12/30/76 $URFACE UNIT 54 PCI/LITEN MEDIUMt MATER = ANALYSES L0aEN LIMIT INDICATOW STATIONS MIGMEST STATION MEAN CONTROL LDCAfgDN8 (TOTAL NuudER) 0F Op1ECTION MFAN, RANG (,AND M[AN, RANGE,AND W[AN, RANGE,AND (NON.NUUT!hE)* (LLD) ho. DETECTE0** hU DETECTE0** NO. OE TEC TE0** .....c.................. FE=99 ( 5) 16. LLO LLO LLO ( 0) (1.5 1.7)E 1 l CD.60 ( 9) 6.6 LLD LLC-LLD ( 0) ZN=65 ( 5) 13 LLD LLO LLO ( 0) (1.2 1.5)F 1 ZR.95 ( 1) 13 LLO LLD LLD ( 0) C8 13e ( 5) 7.6 LLU LLO LLD ( 0) (6.6 8.2)E 0 = C8 137 ( 5) 7.2 LLO LLO LLD 8.2)E o ( 0) (6.6 M.} ( go) 66 (1.6 & 8)E 2 hk (2.4 4 4)E 2 (1.5 a 3)E 2 ( 0) (T.0
32.0)E 1 (T.0 =
29.0)E 1
(
6/ 8)* (Ps 0)
(
1/ 3)* ('s 13) *( 6/ 6)* (Pe 0) NON.HOUTINE REFERS 70 fME NUMBER OF SEPARATE MEASUREMENTS WMICM *ERE GREATER TMAN 1EN (to) T!uES TME AVENAGE RAC.JNOUND FOR THE PERIOD OF THE REPORT
THE FRACTION OF 8 AMPLE AhALYSE8 TIELDING DETECTABLE MEASUREMENT 8 (I.E. >LLD) 18 Ih01CATED mlTHIN *(
AND )*. THE PR08A81LITV.P, TNAT DETEC ABLE MEA 8UngMENT8 RE8 ULT FROM RANDUM FAL8E POSITIVE ERRORS 18 PRINTED ALONG810E IN PERCENT, 1 42
TABLE III-A-2 GASEOUS I-131 CONCENTRATIONS' P]L6H]M I UFFSITE ENVIRONMENTAL RA010 LOGICAL MON!f0NING 03/16/76 PAGE 6 SummaNy FON THE PERIOD 12/30/76 12/31/77 NEDIUma CNANCUAL FILTENs UN!!83 PCI/CU. M ANALYSIS LO*EN Lla!T INDICATON STATIONS MIGME8f STATION MEAN CuhTRUL LOCATION 8 (T0fAL hvamEN) 0F DETECT 10s MEen,RA=GE,Aho mEAN, RANGE,AND
EAN, RANGE,AND (NON.ruu11NE)e (LLu)
Nu. OETECTE0** NV, DEIECIlQ99 NQ. OkIECIE088 1 131.(572) 5.48E.02 (6.e & 4)E 2 P6 (7.7 a 1.0)E.2 (5.2 4 1.0)E =2-( 0) te.2 825.0)E -3 (1.P
80.9)E.2 (3.6 =
16.0)E =2 (2.2 11.03E =2
(106/522). (Ps 0) et 15/ 52)* (8s 0) *(
9/ 50)* (Ps 0) i NON.HOUT]hE kEFENS TO THE NUMBER OF SEPARATE MEASUREMENT 8 mHICH MERE GNEATER IMAN TE N (to) fa=ES THE A VER AGE p ACmGRouND FON THE PEkl0D OF TME NEPUNI as THE FRACfloh 0F SAMPLE ANALV8E8 VIELOING OETECTABLE MEA 8UREMENTS (1.E. >LLD) 18 !NDICAYE0 witMIN a( AND )*. THE PR08A81Lify,P, THAT DETECTABLE MEA 8UREMENTS I RE 8VL T FNOM NANDUa F AL8E PU8!!!vE EdRORS In PRINTED ALONGSIDE IN PERCENT. i c l l l 43
TABLE III-A-3 ISOTOPIC CONCENTRATIONS IN CRANBERRIES l PILGklm 1 0FF 811E ENVIRONMENT AL PAD 10 LOGIC AL MUNITORING - 03/16/78 PAGE 9 SUMMANY F0k THE PERIOD 12/30/76 12/31/77 = MEDIUMS FOOD CRAN 8ERRIES UNIT 83 PC1/GM NET .i ANALYSE 8 lower LIMIT ]NDICATOR STATIONS MIGMEST STATION MEAN CONTROL L'0 CATIONS' (TOTAL NUMBER) DF DETECTION MEAN. RANGE.AND MEAN, RANGE.AND MEAN. RANGE,AND (NON.ROUTINEle (LLD) kW. DETECTEDee NO. DETECTEDee NO. DETECTEDee 1 131 ( 2) 6.58E.03 (5.2 a 4)E.2 BR (5.2 4 8)E.2 LLD ( 0) e( 1/ 1)* (Pe 5)
(
1/' 1)* (Pa 5) M-40 ( 3) .50 (7.3 4 2.2)E.1 P8 (1.5 A .8)E o (1.5 4 1)E O ( 0) (5.1 2/' 23 .a)E.1 9 (Pe c)
(
1/ 13e (Ps 5) *( 1/ 1). (Ps 5) et MN.54 ( 11 6.01E.03 LLD LLD LLD ( 0) (3.5 8.,2)E.3 C3 56 ( }) 6.5ME=01 LLD LLD LLD-( 0) (4.9 8.2)E.3 FE.59 ( 3) 1.6at.02 LLD LLD LLD ( 0) (1.2 2.0)E.2 CO.60 ( 31 8.23E.03 (5.0 a 3.01E.3 BR (5.0 & 3.0)E =) .LLD 4 ( 0) l
(
1/ 2)e (Ps e) a( 1/ 1)e (Pe 5) 2N 65 ( 3) 6.23E.03 LLD LLD LLD ( 0) (1.7 = la.8)E.3 i IR.95 ( 2) 1.65E.02 (6.1 & 7)E.2 RR (6.1 A 7)E.2 LLD ( 0) et 1/ 1)e (Ps 5) e( 1/ 1)e (Ps 5) i Ruel03 ( 21 6.58E=03 (a.8 a 3)E.2 84 (s 8 A .3)E.2 LLD ( or
(
1/ 1)e (Ps 5)
(
1/ 1)e (Ps 5) i e NON.kUUTINE WEFEN8 TU TME NU*8ER OF 8tPANATE MEASUREMENT 8 WNICM utNE GREATER IMAN TEN (10) TIME 8 TME AVERAGE eACMGNOUND FON TME PENIOD OF THE REPONT s se TME FkACf!ON UF S AMPLE AN ALTb[8 VIELDIhG DE TECI AB(E.E A $UREMEN18 (1.E. >LLD) 18 IN0!CATED "1TMIN *( AND 19 IME Pk68A8)LIIV.P. THAT DETECTA8(E MEA 8UREMENT8 RE8 ULT FWOM HANDUM FAL8E POSITIVE Eak0#2 78 PRIN1fD ALONG8IDE IN PENCENT. i 7 44
1 TABLE III-A-3 (Cont) p ] L C. W i m 1 USF831E FNVlwuNatnTAL rah]nLOG1 CAL muN!?Ow! % 03/16/78 PAGE 10 Su=*AWY FVw TmE WEkinu 12/30/76 12/31/77 ME0!ums FUOu CwaNeFWR18 8 UN!!Sg PCI/Gm *ET ANALYSES Liint R LIMIT INUICATOW S T a t itir48 MIGaLST $1A1104 *EAN CONTROL LOCAT1bNS (TOTAL Noastw) 'A DEtttf!ON PFANeh &%E, A ND =Enh,Raut,AhD
E AN,R ANGE, A ND (Nuo-ddull.fle (LL9)
Av. OtTECTtoea Nu DEltCit0*e NO. DEf tCTEDee i 1 .n...................... C8 13e ( 31 7.64E.03 LLU LLD LLO 9.9)E *3 ( 9) (q.9 CS=137 ( /) a.2 5t.93 (5.5 * . Alt =2 Hw (3.5 a .3)E -2 LLD ( n)
(
t/ tJe (Ps 5) a( t/ 1)e (pe 5) 84=149 ( d) 3.29E=02 (P.1 A .t)E =1 RW (2.1 & .1)E al LLD ( 0) et 1/ t)* (Ps 5) e( t/ 1)e (Pm 5) LA-tuo ( 2) 3./96-02 (3.0 A 1)t *1 Bd (3.0 A .1)E =1 LLD ( 0) e( 1/ 1)e (Ps 5)
(
1/ 1)e (Ps 5) l l s e.UN.mouTINE WEFEk6 TO THE Nb=PEk DF SEP anate ut a SuwieEmiS *MICM
ewe GREATER t>A~
FEN (10) f!rt8 f*E avt= AGE H AC4huuND FOR fME PEHIOD OF TME NEPUNT TMt FNACTIUN OF SAMPLE AN ALYSE 8 VitLDING DETEC T ABLE *E ASUREMENTS (1.E. >LLD) 18 INolCATE0 alfwin et AND )e. TME PR08&BIL17Y,P., IMAT DETECTABLE MEA 8UREMENT8 wE8uL1 FWOM NAN 00d FALSE PuSIT!vE EWWOWS 18 PWINTEU ALUNG810E IN PEACENT. 45
l ) l 1 for weekly analysis, before any impact upon marine life could be seen. Ideally, the discharge canal samples serve to identify station-related effluents which may be the cause of radioactivity found in marine life, 1 Table III-B-1 summarizes isotopic concentrations in 1 seawater, showing maximum levels in the discharge canal except for Ru-103, which was found at maximum at the control station, Powder Point, I Duxbury (see Figure II-3). An anomalous measurement report was filed I as a result of activities of Cs-134 and Cs-137 of 22.2 pCi/l and 60.5 j pCi/l respectively found in a sample taken from the discharge canal, October 17, 1977. (Anomalous measurements are reviewed in Section IV.) Plant effluents during the third quarter, and in fact I all of 1977, contained Cs-134 and Cs-137 in the ratio about 1:2 or 1:3, similar to that observed in the sample. The absence of other i detectable isotopes, which were present in the plant discharge in l similar concentrations to that of Cs-137 reveals the influence of other factors on environmental levels. The absence of Co-60 in this l sample, and its average yearly concentration of about one-fourth that of Cs-137 at this location is in contrast to the Co-60 to Cs-137 ratio of the plant effluent and suggests that dilution variations of the discharges will strongly influence observed concentrations. In any case, the concentrations of the observed isotopes are well below the limits of 10CFR20(2) (9000 pCi/1 for Cc-134, 20,000 pCi/1 for Cs-137). 2. MARINE LIFE - SHELLFISH, MOLLUSCS AND LOBSTER Samples of. mussels, clams, quahog and lobster are taken from the area of the plant discharge and other selected locations described in Section II. Lobsters are analyzed and summarized sepa-j 46
l i i l TABLE III-B--l i l ISOTOPIC CONCENTRATIONS IN SEAWATER j l -i l P!LCRIM I 0FF8ITE ENVIRONMENTAL RADIOLOGICAL MONITORING 03/16/78 PAGE 25 .i
SUMMARY
FOR THE PZWIOD 12/30/76 12/31/77 I MEDIUMS MATER 8EA UN!f8: PC1/ LITER ANALY8E8 loner LIMIT INDICAf0R STATION 8 HISME87 STATION MEAN CONTROL LOCAfl0NS (TOTAL NUMBER) 0F DETECT 10N'
EAN, RANGE,AND mEAN, RANGE,AhD MEAN, RANGE.AND (NON. ROUTINE).
(LLO) NO. OETECTE0ee
40. DETECTEDee

40. DETECTEDee GR.A
( 11) 85. LLO LLD LLD l ( 0) (8.9 = 14.8)E 1 1 GR.G ( 29) 2.0 (3.0 & .7)E 0 PD ( 3. 8 4. - 9)E O 13.0 & 6)E O ( 0) (2.3 Za.7)E *1 (3.1 16.0)E.1 (3.1 76.01E =t (1.3 5.0)E o
(
11/ 21)e (Ps 0) e( 7/ 12)e (Ps 0) e( 1/ 8)e (Ps 0) 3 FRAC.1 ( 11) 3.2 LLO PP (9.5 4 2.5)E o (9.5 & 2.5)E O ( 0) (2.3 3.3)E o (7.0 = 12.0)E. 0 (7.0 12.0)E o at 2/ 3)* (Ps 0) a( 2/ 3)e (Ps 0) FRAC.2 ( 11) 3.3 LLO PP (4.0 & 2.0)E 0 (8.0 & 2.0)E O ( 0) '( 1/ 3)* (Ps 13)
(
1/ 3)e (Ps 13) FRAC =3 ( 11) 3.3 LLO LLD LLD I ( 0) l l FRAC.4 ( 11) 1.3 LLO LLO LLD ( o) 8R=89 ( 2) 21 LLO LLO LLO ( 9) (9.9 32.9)E.2 8R.90 ( 2) 6.56E.ut LLD LLD LLD ( 0) (3.3 0.9)E.2. I.131 ( 221 26 (%.* A 3.61E o PD (e.% & e.0)E o (3.0 & l.0)E o ( of (1.2. 'eae.0)E u (2.3
9.5)E o
et 2/ 16)* (Ps 14) ei 3/ 9)e (Ps 49) e( 1/ ele (Ps 23) e NON.WOUfjh( h(F(NS 70 (ME NU.ggR OF 8(PAWAT[ m[ASUWFM[Nig mMICH m(NE GR[Af(R TMav IEN (10) T!=ES int avtNAGE SACMGR0vhD Fod TNE PER10n OF THE REPuRf
fMF FNACT10N OF Sample ANALV8E8 VitL0lkG OETECT ABLE PE A8UugmENf 8 (1.E. >LLD) IS inh 1CATED mITwik *(
AND 3e. TMF PRDPAPILITY,P. TMAT DE TECT ABLE HEA8uREmENf 8 RE SUL T FNDd kam004 FALSE POSITIVE ENROR$ 18 PNINfED ALONG8IDE IN P(R((%T, 47
1 l l 1 TABLE III-B-1 (Cont) l .g PILGN!m 1 .0FFaiff ENVIRONMENTAL RADIOLOGICAL MONITORING-03/16/78 PAGE' 26 ) Summary FUR TME PERIOD 12/30/76 12/31/77 = NE010ms MATER. SEA UNIT 8 PCI/ LITER ANALYSES LOWER LIMIT INDICATOR STAf!Oh8 NISMEST STATION MEAN CONTROL LOCATIONS (f0fAL NUMMER) UF DETECTION MEAN. RANGE.AND MEANeRANGE.AND NEANeRANGE.AND (NON.RoufINE)* (LLD) h0. DETECTE0ee NO. DETECTE0ee. NO. OETECTE0ee; l SE*f ( 2a) 1.98E+02 LLO LLO LLO. l ( 0) (9.5 = a94.0)E 0 i M.40 ( 39) 2.45Ee02 (2.3 & 4)E 2 P0 (3.2 & 3)E 2 (2.7 & 8)E 2 ( 0) (8.9. 494.03E o (2.6 =. - 48.01E 1 (2.4 4.0)E 2 (3.4.. 40.0)E 1 { a( 12/ 27)e (Pe 0) et 8/ 15}e (Ps 0) *( 8/ 12)* (Ps 0) NN.54 ( 41) 13 ( 2. 6 & - 1.7)E O PD (2.6 & 1.7)E 0' 'LLO ( 0) (9.5 32e.0)E.1 (9.7 43.0)E.t .(9.7 43.01E.1 et 2/ 29)e (Pe 25) et 2/ 16)e (Ps $4) .e -CD.58 ( ao) 13 LLO LLD LLO ( 0) (1.0 49.4)E O i FE=59 ( 25) 5.t LLD LLO LLO ( 0) (2.2 9.9)E 0 Co.60 ( el) te. (5.0 & 2.6)E o PD (5.0 & 2.6)E O (2.0 & 6)E o: ( 0) (9.4 329.o)E.1 (1.0 12.4)E o (1.0 12.a)E o ( 1. 4. ' 2.6)E 0 I et s/ 29)e (Ps 4) e( 4/ 16)e (ps 0) a( 2/ 12)e (Ps 9) 1 ZN.65 ( 81) 22 LLO LLO LLO ( 0) (2.0 65.8)E O l IR.95 1 26) s8 LLo LLO LLO l-( 0) (1.8 9.9)E y RU.103 ( 11) 5.2 LLO PP (2.5 & 5)E O (2.5 & .5)E 0l ( 0) (1.2 32.9)E 0 et 1/ 4)e (Ps 17) et 1/.. ele (Ps 17) -] RU.106 ( 19) 13 LLO LLO LLO j ( 0) (8.6 17.7)E o 1 1 1 l ? NON.dUuflht WEFEN8 'f D TME NU.RER OF SEP AR A TE ME ASUREMEhts wMICN MERE GkEATER e TMAN TE N (10) f1MLS.fwt AVERAGE 9ACnGROUND FOR THE PERIUS OF THE REPORT se f>E FWAct!ON OF 8 AMPLE ANALVSES Y!ELDING DE TECT ABLE MEA SUREMENT8 (f.E. >LLD) 18 tholCATED w!?Mth et Aho )e. far Puc8&81LIfy.P. TNAT DETECTABLE MEASUREpEhf8 l RESUL T FWD. H ANDom F AL 8E 808t tivE ENNOR8 18 PRIhfED ALONG810E IN PERCENT. 'l j 48 _____._______1__
1 l TABLE III-B-1 (Cont) p!LGRIM ! ufFSITE FNVIRUNMENTAL RADIOLOGICAL MON!!DRING. 03/16/18 PAGE 27 9pMMANY F0W TMF FERIOD 12/30/76 12/31/T7 MEDIUMB WATEW SEA UNI)83 PCI/ LITER ANALYSES L0eEN LIMIT , INDICA!OR STAT!nNS MIGMEST STATION MEAN CONTROL LOCATIONS (TOTAL NUAGEN) UF DETECTION aEAN,pANGE,AND MEAN, RANGE,AND MEAN,nANGE.AND -(NON.ROUTINfle (LLD)
90. DETECTEuee No OETECTED e Nu. DE TECTED*e C8=134 ( 25)
P.3 (1.5 A .5)E 1 PD (1.5 A .5)E 1 LLO ( 0) (9.3 = 49.4)E.1 (5.0 = 22.2)E 0 (5.0 's t. 2 ) E o .( 3/ t?). (Ps el et 3/ 9)e (Ps' c) C8=137 ( 41) 13 41.m a 1.0)E 1 Po (2.1 a 1.2)E a (Lo ( u) (1.1 = 32.9)E o (9.0 6050.0)E.2 (1.9 605.0)E.1 = = e( 7/ 29)e (Ps 0) et e/ 16)e (Ps- 0). SA=1a0 ( 24) 19 LLo LLo (Lo. j ( c) (6.6 let.0)E o CEalal ( 9) 3.8 LLD LLO LLO 1 ( 0) (2.2 8.7)E o j CE.la# ( A) 1.5 LLD LLo - LLn f 0) (9.4 21.1)E.1 = He3 ( 24) 66 (a.1 A 9)E 2 PD (5.2 A 1.2)E 2 (1.3 A 53E 2 ( 0) (1.0 = 8.5)E 2 (2.0 8.5)E 2 (8.0 = 23.8)E 1 =
(
tt/ 17)e (Ps o)
(
T/ 11)e (Ps 0) e( 3/ 7)e (Ps 0) l e NON.NDUTINE NEFERS TO TME NUM8ER OF 8EPAR A TE ME ASUREMENTS eMICH MENE GREATER TMAN TEN (10) TIMES THE A4ERAGE 8ACKGROUND FON THE PERIOD OF THE REPORT
TME FRACTION OF SAMPLE ANALVSES Y!ELDING DETECTABLE MEASUREMENTS
(!.E. >LLD) 18 tN0!CATED >!TMIN et AND ).. TME PR06A81LITY,p, THAT DETECTA8LE kEA80REMENT8 NE8 ULT FROM NANDum FAL8E PU81TIVE ENROR8 18 PWINTED ALONG81DE IN PERCENT. i l i 49 I
rately from other shellfish because they are a commercial product and i ~ accordingly have special importance to the economy of the region. Table III-B-2a shows isotopic concentrations in lobsters with only i two isotopes above minimum detec'eble activities - Ce-141 and Co-60, For both of these isotopes, only one sample contained concentrations in excess of LLD, corresponding to significant probabilities of an accidental or spurious count. The Co-60 reading is near the minimum LLD for the year, and well below the average LLD for the year at the 95 percent confidence level. The limited significance of a single measurement is further reduced by the presence of Ce-141 without Ce-144, while PNPS releases prior to the lobster sampling were in the ratio Ce-141:Ce-144 = 2, which would result in a detectable level of 'i 1 Ce-144 in lobsters, were plant releases responsible. 1 Molluscs (mussels, clams, quahogs, etc.) are sampled I at six locations described in Section II. With the implementation of the technical specification revision of April 19, 1977, special high sensitivity requirements were established for measuring radio-l l activity in these marine animals. Tables III-B-2b and c contrast the l results before and af ter the high sensitivity requirements were implemented. During the first quarter of 1977,.Zn-65 and Cs-137 I were observed at the discharge canal (EC) in concentrations above LLD. Co-60 at the discharge canal was statistically insignificant; j l indeed fewer than half of all locations showed Co-60 above LLD and those measurements above LLD were not statistically significant. Cs-137 was observed above LLD once only (of seven measurements). The l l 50
1 l l 1 TABLE III-B-2a ISOTOPIC CONCENTRATIONS IN ARTHROPODS (LOBSTER) PILGRIM I 0FFt1TE ENVIRUNrENTAL RADIOLOGICAL MONITORING 03/16/78 PAGE-6 $UmMAkV FUR ?>E PERIOD 12/30/76 12/31/77 = MEDIUmi ARTHROPUDI UNIT 88 PC1/GM *ET ANALYSE 8 LonEN LfMIT thDICATON STATIONS NIGHEST STATION MEAN CONTROL LOCATIONS (TOTAL NUa6ER) 0F CEfECTION aEAN,AANGE,Aa0
EAN,NANGEeAND MEAN, RANGE,AND (NON. ROUTINE)e (LLD) hu. DETECTEDee
. NU. DEfECTEDe* No. DETECTEDee .......e................ St.7 (. 9) 55 LLD LLD LLD ( 0) (2.1 = 0.0)E.1 1 E.80 ( 15) 66 (2.0 A .3)E o EC (2.4 A 1)E o fl.7 & 3)E 0 f. 0) (1.0 3.0)E o (1.5 3.0)E o (7.0 26.0)E.1 e( 7/ eje (Pt v)
(
4/ 4)e (Ps- 0) *( 7/ 7)e (Ps 0)- q MN.58 ( 10) 3.17E.02 LLo LLk LLD .l t of (1.3 4 a 9 3 5
.2
{ C0=58 ( 15) 5.elt.02 LLD LLD LLD I ( 0) (l.9 = 6.2)E.2 i FE659 ( 15) .t7 LLD LLD LLD ( 0) (b.e e 32.9)E.2 .1 CD.60 ( 15) .26 (2.7 A 7)E =2 EC (2.7 A .flE.2 LLD j ( c) (1.3 - 329.01E =2 1 et 1/ 6)* (Ps 27) et 1/ 4le (P:s 17 ) I j ' ZN.65 ( 15) 6.voE.02 LL 1 LLD LLD ( 0) (2.9 11.5)E.2 I l I IR.95 ( 8) 9.95t=02 LLD LLD LLD ( u) (3.6 14,0)E.2 RV.103 ( 9) 9.9 tt.02 LLC LLD L1,6 j ( e) ( 3. 8) 17.9)E .2 j e N0h W.iuTINE utF Eks 70 TML Nu.etP OF stPARATE MtA8UREMENT8 wMICH MERE GHFATER l TaAN Ti d (191 T!*E8 THE AvfwAGE RACKGROUND F0w INE pew!UD UF TML NEPUaf et TME FNACTIUN UF SA"PLE ANALV8E8 TILLDING DETECTABLE mEASUREaEN18 { i (1.E. >LLD) 18 INDICATED a! THIN e( AND Je. Yet Pk0uadlLjiV,P, TMAT DETECTA9LE HEA8U#EMENT8
f 6 ULT WhDM wakhun F AL 8E PUS]Tj v1 tNWOwS 18 PRINTF D ALDNGBIDE != Pf NCEkt.
1 i ] r i 51 i i
1, TABLE III-B-2a (Cont) _l v!LGNIM 1 '# F 8I TE t h vikON.t h f 4L R ADIOLOGIC AL euh!!ON!aG 03/16/78-PAGE 7-12/31/77 SumaAWT F0w TMF PEWinD 12/39/76 MEDIUMS ANTMN0 PUD 8 UNIf8: PC1/GM *ET j ANALYSE 8 LOmFN LIMIT th0!CA70s STATIONS MIGHEST STATION PEAN C0kfROL LUCAT10h8 l (TOTAL NurPER) UP DET!CfjQN
Esh.RAbbE.4hr PEAh.RAhGEpAND MEAheRAhGEpAND (NON kOUTINEje (LLp) hu. DtTECTEU**
NU. DETECTtDen hu. DETECTEDe* ..............w.... I RU.106 ( 9) .23 LLD LLD LLD ( 0) (1.2
3.5)E.1 C8 134 ( 15) 3.3eE 02 LLD LLD LLD
( n) (1.3 S.7)E.2 C8 137 ( 15) 2.92E*U2 LLp LLD LLD L ( 0) (1.2 a.9)E.2 L i 84 140 ( 9) 10 LLD LLD LLD i ( 0) (1.4. 32.0)E o I CEstas ( 0) 1.8 (9.3 a 1.2)E 1 EC (5.3 A 1.2)E.1 LLD ( 0) (6.9 1340.0)E.2 et t/ 4)* (Re 37) et 1/ a)e (Ps IT) CE*lde ( 9) 88 LLD LLD LLD ( 0) (1.2 TSt.0)E =2 e NON.NOUTI=E REFER 8 10 TME kumetR OF SEPANATE MEA 8UREMEhT8 mHICM PERE GNEATER TMAN TEN (10) TIME 8 THE AyERAGE SACKGROWhD FOR TME PEH100 0F THE REPONT
TME FRACT10k 0F BAMPLE ANALf8E8 Y!ELDING DETECTAsLE MEASUREMENT 8 (1.E. >LLD) 18 thDICATED mITMIN *(
AND le. THE PROBABILITY P, TMAT DETECTA8LE mEASUREMEkf8 p RE SUL1 FROM NANDum FALSE POSITIVE ERNORS !$ PRjNTED ALONG81DE jh PERCEht. i 5 I i 52 b
i a TABLE III-B-2b ISOTOPIC CONCENTRATIONS IN SHELLFISH (JAN 1 - APR 20,1977) l PliGw1M i UFF SITE ENv!NUNMENTAL N ADinLOGIC AL muh!TORING 03/16/78 PAGE 10 i 04/19/77 SUMMANY FnR TME PERIOD 12/30/76 MEDIUMS SMELLFISM UNIT 8g PCI/GM MET ANALv8f8 Lu ER Lim 1T INDICATON STATION) M[$MEST STAI1DN MEAN CONTROL LOCATIONS (TOTAL NUa8EM) 0F DETECTION MFAN, RANGE,AND MEAk,NANGEeAND MEANeRANGE,AND (NON. ROUTINE)e (LL9) NO. OETECTEDee NU. DE1ECTEDe= NU. DETECTEDee SE.7 ( 7) 60 (3.6 a 1.3)E 1 EC 66.2 & l.1)E 1 (4.5 & 1.1)E 1 6.2)E I ( 0) (4.0
8. 0 ) E.1 (2.0
= a( 3/ 6)e (Ps c) e( 1/ 1)* (Ps 5) *( 1/ 1)* (Ps 5) K.40 ( 7) 1.0 (7.e A 3.1)E 2 GM (1.4 A 8)E 3 (1.8 & 1)E 3 ( 0) (2.e = 1330.0)E 0 et 5/ 6)* (Ps 0)
(
1/ 1)e (Ps 5) e( 1/ 1)e (Ps 5) MN.54 ( 4) 5.00E.02 (1.3 4 8)E.2 EC (1.3 & 8)E.2 LLD ( 0) (4.0 6.0)E.2
(
t/ 4)e (Ps 17)
(
1/ 13e (Pa 5) CO.58 ( 3) 6.00E.02 LLD LLD LLD ( n) (b.o. 7.01E.2 FE.59 ( 4) .l? LLD LLD L'L D ..j ( 0) (1.o. 2.0)E =l CD 60 ( e) .e5 (e.7 4 5.5)E 0 EC (8.8 A 6.8)E 0 LLD 210.0)E.2 (a.e. 1760.0)E =2 (4.8 = 1760.0)E.2 ( I) (e.0 et 3/ 7)e (Ps 0) et 2/ 2)e (Ps 0) ZN.65 ( e) 1.4 (4.7 & 2.8)E O EC (4.7 & 2.8)E o LLD ( 0) (1.4 500.o)E.2 e( 1/ 7)e (Ps 25)
(
1/ 2)e (Ps g) ZR*95 ( A) 1.9 LLD LLD LLD ( 0) (3.0 = c10.0)E.2 RU.104 ( f) 8.uoE.02 (3.3 a 3)E O GM (3.7 a lea)E o (3.7 & 1.4)E 0 ( 0) (6.0 10.0)E.2 (2.7 3.6)E o at 3/ 6). (Ps o) et 1/ 1)e (Ps 5) et 1/ 13e (Ps 5) e NON. ROUTINE REFENS TO TME NUMSEN OF SEPARATE MEASUREMENT 8 mMICM *ERE GREATER THAN TEN (10) f!*E8 TME AVENAGF RACMGROUND FOR THE PERIOD OF THE REPORT se TML F# ACTION OF SA*PLE ANALYSE 8 Y!ELDING DETECTABLE MEA 8UREMENTS (1.E. >LLD) 18 ikDICATED mITMIN *( AND )e. TME PR08&8tLITY,P, TMAT DETECTABLE MEASUREMENT 8 stE8VL T F NOM NANDOM FAL8E POSITIVE ERROR 8 18 PRINTED ALUNG81DE IN PERCENT. l ~! 53 _______--_--_A
l i TABLE III-B-2b (Cont) PjLGNjM [ OFF8]IF ENVIRONMENTAL RADIOLOGICAL MONITORING 03/16/78 PAGE 11
SUMMARY
FOR TME PERIOD 12/30/76. 04/19/77 NErtuMs 8HELLP!8N UNIf83 PCI/GM NET ANALYSE 8 L0mER LIMIT INDICATOR STAf10N8 HIGNEST STAf!DN MEAN CONTROL LOCAf!0NS (TOTAL NOMBER) 0F DETECTION MEAN, RANGE,AND MEAN, RANGE,AND MEAN, RANGE,AND .i (NON. Rout!NE)* (LLD) NO. DETECTEDe* N0. DETECTED ** NO DETECTEDee RU.106 ( 3) 43 LLD LLD LLO ( 0) (3.0 S.0)E.1 C8 134 ( 43 82 LLD LLD LLD-( 0) ($.2 1800.0)E.3 C3 137 ( 6) (4.5. 66 (1 7 A 7)E 0 EC (1.7 A .7)E 0 LLD ( 0) 1600.9)E .)
(
1/ 7)* (Ps 25)
(
1/ 2)e (Ps 0) l BA.140 ( }) 80 LLD LLD LLD l ( 0) (6.0 10.01E.1 j CE.let ( 31 17 Lto LLD LLD 'I ( 0) (3.0 2.0)E.1 j CE.144 ( A) 3.4 LLD LLD LLD ( 0) (1.7 700.01E *2 NON. ROUTINE REFERS 70 THE NUMBER OF SEPARATE MEASUREMENT $ aMICN MERE GREATER e j IMAN TEN (10) Tipt8 TME AvfRAGE hACMGROUND FOR TME PERIOD OF THE REPONT j
e IME FRAC T!DN OF SAMPLE AN ALYSE 8 VIELDING DETECTABLE ME A8UREMENTS 1
(1.E. >L LD) 18 INDICATED.IIMIN.( ahD 3e. TME PHOBA$!LITV,P, THAT DETECTA8LE MEASUREMENT 8 ME8uL1 FROM NaNDO. FALSE P68tt!VE EkRONS IS Pu!NTFD ALUNG91DE IN PERCENT. s l l 54 l a
TABLE III-B-2c ISOTOPIC CONCENTRATIONS IN SHELLFISH (APRIL 20 - DEC 31, 1977) PItowim ( OF F si t t (Nv!NuNatNT AL wa0!nLOGIC AL m0N!TURING 03/16/78 PAGE 19 au=makV F0u Ins PERIUD 44/2n/77 12/31/77 ME010as SatLLF188 UNIT 8: PCI/G" *ET ANALTSES LOpfM LIMIT INDICATOR $TATjoN8 HIGHEST STATION MEAN CONTROL LOCATIONS ( TOT AL NV"HE R) 0F 0F TE C f10N =EAN, RANGE.AND
EAN.PANGE.AND

FAN.PANGE.AND (NON=ROUTimt)*
(LLD) NU. DETECIEpee NO. DETECTE0ee NU. OETECTE0e* BE=f ( 26) 9.63E=02 (5.7 A .elt =2 PLH (6.0 A .1)E 2 LLO ( 0) (2.3 = Sv.8)E 2 (3.9 e.2)E =2 (5.9 6.1)E =2 = =
(
e/ 24). (Ps o)
(
2/ e)e (Ps 1) i M*40 ( 32) 50 ( 1. 3 A 1)E O PLM (2.0 & 1)E O (1.4 & 3)E D ( 0) (1.5 = 21.8)E al (1.6 2.1)E 0 (3.1 = 23.1)E =1 = et te/ 28)* (Ps u) et 4/ 4)* (Ps 0) *( 6/ 6)e (Ps 0) MN=58 ( 25) 1.12E=92 (3.4 a 1.0)E =2 EC (3.7 & 1.1)E =2 LLD ( t) (2.3 - 52.1)E 3 (5.1 120.0)E a3 (6.o = 124.0)E.3 et 13/ 21)e (Ps p) et 12/ 11)* (Ps 0) C0=58 ( 25) 9.75E=03 (6 1 a 1.2)E =3 EC (6.1 a 1.2)E =3 LLO ( 0) (2.7 = 47.5lE =h
(
1/ 21)e (Pr 37) e( 1/ 14)e (Ps 15) FE=59 ( 25) 2.3eE=02 LLO LLD LLD ( 0) (6.0 = lit.0)E =3 C0=60 ( Au) 9.eet 03 (1 5 a ,u)E =t EC (1.8 a 4)E *t (u.5 & 1.3)E =3 ( 13) (i.e. 45.7)E =) (t.1 67.3)E -2 (2.8 67.3)E =2 = = et la/ 28)e (Ps 93 et 15 / 16 ) e (Ps 0) *( 1/ 6)e (Ps 23) IN=65 ( 34) 1.82E=02 te.s & 5)E =2 EC (4.4 &. 5.8)E =2 5)E =2 LLO ( 0) (5.6 112.0)E =3 (2.8 5.8)E =2 (2.8 = = =
(
7/ 2 Ale (Ps 0)
(
T / 16) e (Ps 0) ER 95 ( 36) 2.04E=02 (1.a a 2)E =2 PLM (1.8 4 3)E =2 (1.0 & .1)E =2 ( 0) (4.7 ll3.0)E =3 (1.1
1.8)E.2 (9.2 =
11.3)E *3 = et c/ 30)e (Ps a) a( 1/ a)e (Ps 17) e( 2/ 6)e (Ps 3) RU=103 ( 30) 1.62E=02 (1.2 A ,2)E *2 MP (1.8 A 5)E -2 (1.2 a 53E *2 ( 0) (6.a = 08.8)E 3 (5.1 = 2s.3)E 3 (1.3 = 2.2)E =2 (6.8 21.4)E =3 a et in/ 25)e (Ps v)
(
2/ 3)e (Ps 0) et 3/ 5)* (Ps 0) e NON.NouTINE #EFER8 70 THE NumRER OF SEPAR ATE ME ASUREMENTS WHICH WERE GREATER ' man TEN (10) Time 8 THE AVERAGE RACMGNOUND FON THE PERIOD OF THE REPOST
1ME FRACTION OF SAMPLE ANALV8E8 Y!ELOING DETECTABLE

MEASUREMENTS
(!.E. >LLO) 18 IN0!CATED s! THIN *( AND )e. TME PR08 ABILITY.P, THAT DETECTABLE MEASUREMENTS RE84LT FROM NAN 00m FALSE PU8!T1vE ENROR8 18 'RINTED ALONG8IDE IN PEaCENT. 55
l TABLE III-B-2c (Cont) P!LGWIM 1 UF F 611E t % v i evNa t hf at hsDioLOGICat auN1TowlNG 93/16/78 PAGE 20 sv*.awy 50w inE *taino 0a/20/77 12/31/77 MEDIUM BMELLF18M UN118 PCI/Ga aET ANALV8E8 L0aEW L1alf thu!Caf0W 87&f!ON8 MIGMEST STAi!Oh *EAN CONTROL Locafloh8 (TUTAL humatk) 0F orfECTION MF a*, Ra AGE, ANN
Edw.NANGE,AND MEAN.#AhGE.AhD (NON.R0911ht).
(LLv) wo. nETECTEnee Nu. OfTECitnee =U. OETECTE0** I RU 106 ( 27) 7.55E.02 (4.6 A 2)E.2 *P (m.8 A 1.3)E 2 (3.7 A 1.3)E.2 l ( 0) (2.2 = e3.2)E =2 (e.e - s.e)E.2 l
(
2/ 23)e (Ps 2[)
(
}/ 3)e (Ps 13) e( 1/ 4)e (Ps 17) C8*134 ( Ju) 7,3nE.01 (1.3 & .2)E 2 FC (1.3 & 2)E.2 LLO ( 0) (2.2 50.0)r =5 et 1/ 28)* (Ps 35)
(
1/ 17)e (Ps 37) C8 137 ( 35) 4.35E.03. (1.0 & 3)f 2 EC (1.2 A 8)E 2 LLO i ( 0) (2.3 e?.n)t 3 (3 3 36,e)E.3 (l.a. 36.6)E.3 1 a( 11/ dw)e (Ps o) et e/ 17)e (Ps 0) 8A=le0 ( 25) 17 LLO LLD LLD ( 0) (2.1 60.9)E.2 CE=141 ( 26) 2.00t.02 (1.8 A 3)E.2 EC (2.1 A 4)E 2 LLD ( 0) (3.7 fl2.0)E.3 (1.5 2.1)E =2
(
2/ 22)e (Ps 20)
(
1/ 15)* (Ps 36) CE*144 ( 35) 1.28E.02 (3.5 A 7)E 2 EC (e.2 & 1.2)E.2 (2.0 A t.1)E.2 ( 0) (i.e. 70.01E.3 (2.n. e.2)E.2 et 2/ 2eie (Ps 75)
(
1/ 17)e (Ps 37) a( 1/ 6le (Ps 23) NON.NOUT1ht REFEN8 IQ THE NUMBER OF SEPARATE HEA$UREMEhI8 mHICH MERE GREATER e THAN TEN (10) flat 8 THE AVERAGE BACNGROUND FOR thE PERIOD OF THE REPORT en f>E/ FRACTION OF SAMPLE ANALYSE 8 V!ELO!hG DETECTABLE MEA 8veEMEkTS (1.E. >LLD) 18 lNDICATED m! THIN *( AND le. THE PH0d&BILifV.P. THAT DETECTABLE MEASUREMENTS RE 8UL T F PO. d&N00= F AL 8E Pu8171vE EWROR 8 18 PRIh1F D aLONG81DE I4 FEWCENT. 1 l l l l l l 56 l l
I ratio of Co-60 to Co-58 in the liquid discharge during the first I quarter was 20; the LLD for Co-58 is below 1/20 (or 1/40 allowing for l decay of Co-58) of observed Co-60 levels so that Co-58 in PNPS efflu-ents would have been observed if present. Its absence suggests that l Co-60 found in indicator stations may have accumulated prior to 1977. Cs-134, however, would not be observable above LLD if-it were present at one-third the level of Cs-137, which was the ratio of these iso-topes in station releases. The much lower minimum sensitivities implemented under ') the technical specification revision of April 19, 1977, consequently t produced positive measurements in many cases during the remainder j of 1977. Table III-B-2c shows statistically significant activities of Mn-54, Co-60, Zn-65, and Cs-137. Co-58 was observed above LLD only once, with a correspondingly large probability of being spurious. The measurement value, if real, is consistent with the concentration ) expected from the relative concentrations of Co-58 and 60 in PNPS effluents. Zr-95, Ru-103 and Ru-106 are on average below LLD and j I their maximum levels are found at locations elsewhere than the dis-charge canal. This remote location maximization does not preclude the PNPS as the source; coupled with the very small and statistically J l marginal activity levels, however, one may conclude that station effluents are probably not the source. Both cesium isotopes are observed only once above LLD, and with the high sensitivity in effect during this period, better evidence is necessary to conclude that station releases are responsible. l 57 l
f The significant isotopes, Mn-54, Co-60, Zn-65 and Cs-137 bear close examination. Zn-65 was found at levels about 4 times lower than those of Co-60 in the mussels at the discharge outfall although it is discharged from the PNPS at 40 times lower concentrations than Co-60. Similarly, Cs-137 is found at 100 times lower concentration relative to Co-60 than in PNPS effluents. Mn-54 l on the other hand exists in the mussels in similar ratio to Co-60 as in PNPS effluents. These isotopes are likely the result of plant discharges, and their presence in September samplings was reported to NRC as an anomalous measurement (see Section IV). The dose impact of these concentrations is negligible, and moreover, the PNPS releases from which the observed concentrations arise, are well below applicable regulatory limits (10 CFR 20) (2) Figure III-B-1, shows that concentrations of Co-60 in mussels at the discharge canal were relatively high in September, reflecting third quarter station effluents. After that anomalous report, additional samplings were made at the discharge canal at three sites along a 100' range at the quarterly sampling date and i again two weels later at the end of December. Both sets of December j t samplings showed activities considerably reduced from the September level, confirming that the September observation was a transient l event which had no significant long-term impact. The additional i samplings at the discharge canal, repeated in late December, will l be continued into 1978 to provide confirmation of activity trends I seen in 1977. l l l j 58 1
/ i g yL l n. c X uC .s "u u 2 nD ~ iE = J +g ' f, ' r p C E 0 4 l .V. N nO [0 ~ s nN g T T R n O T e u. L S T P r. -e'
1-l,.hg T H C
n E + i O + i H = n. L .}, nP F P )/ iE O oS. N p-E O G I n N T u. A R G nU R T uR S E p H n T X
u. Y
= L E X nU. D U J-7, D I ,og 7 S 9 T f .~ uN O r ? N nE U H 1 O S I nU T I J S F u R L g R L T E E n S i B M H nY U x S oR ~ N = M 6 n 0 g Y T H n. G i I O C nR V N nP I A T O u g> C I R T ~ A ~ nR E T nA T S
n. M A
C g ID = n n. N B I P
n. F E
M I n S M i E N ~ n U O I R n. L I G ,N A T L nA V A J T I n Z S P
5:-
i5 ~ : : ~ 5- ~ 1 1 1 1 1 0 0 0 0 0 E E C E E 0 0 0 0 0 5 0 5 0 5 7 6 4 3 1 D ra$s Ua. iu*
3. MARINE LIFE - FINFISH Fish of several species are sampled off the discharge canal and offshore for control samples. The species include fish of varying kinds and they are analyzed by group according to their mobility characteristics. All analyses are summarized together by isotops in Table III-B-3, since very few measurements were above LLD. Co-60 was found in observable concentration, but of 1 almost ecual amount to that of Co-58. Since PNPS effluents of i these isotopes were in the ratio Co-60:Co-58 = 30:1, and the Co-58 ) half-life would result in the relative concentration in the environ-ment over a calendar quarter sampling interval to be increased to about 60, the PNPS does not appear to be the primary source of Cobalt in fish. Pimilarly, Ce-141 is not accompanied by observable concentrations of Ce-144, although the plant discharge contained j half as much Ce-144 as Ce-141 which is certainly a detectable amount l if the same concentration ratio existed in fish. Ru-103, the other artificial isotope found in fish is noted as the result of a single measurement which has a significant probability of being spurious. Finally, Cs-137 was observed, but at levels below the average LLD for the year and only two of the observations were themselves above LLD. Cs-134 was not observed, while its average LLD was comparable to that for Cs-137. Station effluents contained about twice as much Cs-137 as Cs-134 which is consistent with the detection limits; that is, the lack of observed Cs-134 and 137 in statistically i significant amounts is consistent with a wide range of relative t 60
TABLE III-B-3 1 ISOTOPIC CONCENTRATIONS IN FISH I I PILGRIM I 0FFSITE EkV1RuhmEhfAL RADIOLOGICAL MONITON!hG 03/16/78 PAGE iS Su# MARY FOR fnt PERIOD 12/30/76 12/31/77 = MEDIUMS FISH Uhlias PCI/GM kET ANALYSES LumER LIMIT IhDICATON 87ATION8 NjGMEST STAi!Oh MEAN CONfWOL LUCATIOh8 (TOTAL Num8ER) 0F DETECTION mEAh RahGE.AhD MEAN. RANG (.AhD M(AN. rah 6(.AND (h0h=NOUTlhE)* (LLD) NO. DETECTED *e NO. DETECTtDee NO DEigCTEDee SE.7 ( 37) 45 LLD LLD LLD ( 0) (1.6 = 8.8)E.1 1' N.a0 ( 81) 7e (2.R A 1)E 0 DC (3.2 A .1)E o -(3.1 A 2)E 0 ( 0) (3.0 Al.5)E.1 (9.0 = G8.0)E.3 (0.0 Alet)E.1 (2.2 3.9)E o
(
70/ 73)e (Ps 0)
( 32/ 33)e (Ps 0)

(
8/ 8)* (Ps 0) i MN.54 ( 83) 3.3eE.02 4.L D LLD LLD I ( 0) (1.3 8.2)E.2 I CO*58 * ( el)- (1.7. 38E.U2 n (5.4 A 1.6)E.2 DC (5.e A 3.6)E.2 LLD ( 0) 9.9)E.2 .i a( t/ 75)e (Ps 8) e( 1/ 34)e (Ps 31) FE*59 ( 62) .12 LLD LLD LLn I ( ol (8.0 24.7)E.2 b l CO.60 ( 83) 3.37E.02 (8.0 A 1.8)E.2 DC (e.0 A 1.8)E 2 LLD l ( of (1.3 d.2)t 2 (1.7
7.b)E.2 (1.7 7.5)E.2 i
et 3/ 75)e (Ps all et 3/ 3a)e (Ps 15) j Zh*65 ( 82) 7.2nE 02 LLD LLD LLD I ( 03 (3.1 13.2)E.2 1 IR=95 ( 18) 7.67t=02 LLD g,L D Lgn ( 0) (2.9
15.9)E.2 RU.103 ( 36) 7.09E*u2 (3.P A t.2)E.2 DC (3.8 A l.P)E =2 LLD
( 0) (2.1 Id.4)E =2 l e et n/ 20)e (Ps 34) e( 1/ 29)e (Ps 34) I e huh.wouilNE WEP EWS TU f at hua4E 4 f 4 SEPANATE MEA 8VW(MEN (8.NICN SERE GWEATEW THas TEh (to) 11.E8 TME aVFn4GE PACsGa0UND fue TME PEkIUD OF 1ME REPUwi
INE FWaCTION OF barpLE aNALv8E8 Y1tLDING DETECTABLE *EA5VSEMEhfS (1.E. >LLU ) IS InD1CafED clTMIN et a=0 le. THE PR09491L11v.P. TMAT DETECIAHLE at'A8upErthf8 WEBULT Fwom wanno-FaL 8E PUS 171%E ENRORS 18 PN1=1Eu eLONGSADE IN PERCFht, i
61
1 l L TABLE III-B-3 (Cont) PILGRIM I Of f 81TE ENv!RONmENT AL # ADIOLOGIC AL MON!TURING. 03/16/T8 PAGE 16 SUMM&WY FOR THE PERIOD 12/30/T6 12/31/TT = MEDIUMS F18H UNIT 83 PC1/Gu WET ANALYSES LoafW LImWT IhDICATOM STATIONS MIGHEST STATION MEAN CONTp0L LOCATIONS I (TOTAL hupSER) 0F DEFECTION MEah, RANGE,AND mEAN,RANGFeAND .MEAN,RANGEeAND (NON. ROUT!bE)* (LLD) NO. D[TECTEDet NU. DETE6TEDet NO. DETECTED ** AU.106 ( 38) 26 LLD LLD LLD ( 0) (1.2 = 4.9)E.1 C8 134 ( 82) 2.69E.02 LLD LLD LLD ( 0) (1.3 8.2)E.2 C8=137 ( 82) 3.52E.02 (2.5 A .3)E.2 DC (2.5 & .3)E.2 LLD ( 03 (t.3 = R.2)E.2 12.2 2.8)E.2 (2.2 = 2.8)E =2 e( 2/ T5)e (Pm 16) et 2/ 3 ele (Pe 27) 84 140 ( 3R) 2.3 LLD LLD LLD ( 0) (1.6 55.8)E.8 CE lat ( 38) .16 (5.2 a 5)E.3 DC (5.2 A .5)E.1 LLD ( 0) (8.9 35.9)E.2 (3 3 = 8.1)E.1 ( 3. 3. - 8.1)E.1 et e/ 30)e (Ps 0) et 9/ 30)e (Ps 0) CE.144 ( 37) 3.88E.02 LLD LLD .LLD ( 0) (1.8 9.8)E *2
)
l e h0m.wouT!wE REFEwa TO THE hum 8ER OF SEPAhATE MEASUNEMEhf8 >HICM *ERE GREATER TMAN TEN ($0) TIMES THE avtNAGE 8ACNGROUND FOR THE PERIOD OF THE HEPORT es THE PR4CI!ON OF SAMPLE ANALYSE S YIELDING DE TECT A8LE *E A8uRE"ENTS (1.E. >LLD) 18 1NDICA1E0 !TM1h of ANO 3e. TMf PR08aeILITV.P. 1 MAT DEftCTABLE MEASUREMENT 8 NE8 ULT #Roa WahDua F ALSE P08111VE EkRDNS 38 PRINTFD #LUNb8)DE IN PERCENT. 62 l
1 s ) l a l I concentrations in station effluents. The relative abundance of Cs-137 in weapons test fallout (several hundred times that of Cs-134) 1 would cause Cs-137 to be observed when Cs-134 is below observable l levels so the small number of positive observations does not support a conclusive source identification for cesium in fish. 4. MARINE LIFE - IRISH MOSS AND SEDIMENTS l As shown in Table III-B-4, positive indications exist for several isotopes. Co-60 at the discharge canal was found in concentrations well above the control station level and about 40 ) I times the concentration of Co-58 at the same location. This ratio is similar to that of Co-60 and Co-58 in the liquid releases,- i 1 (about 30) and sufficiently consistent with the ratio of about 60 after the greater decay of Co-58 (71 day half-life) during the sampling interval to identify PNPS as the source of these isotopes. Similarly, Mn-54 is found at about 1/3 the level of co-60, the same ratio of these isotopes as in the liquid releases. Cs-137 is also observed in this medium. In contrast, neither Ce-141 nor Ce-144 at foreground stations are significantly above control station concentrations, nor is Zr-95 or Ru-103. Zn-65, c1though observable with all positive measurements at the station of highest mean, EC (the discharge canal), is present at about 20 percent of the observed level of Co-60 at this location compared to ten times lower concentration relative to Co-60 in PNPS effluent. These latter isotopes may therefore arise in part from other sources than PNPS effluent. 63
TABLE III-B-4 ISOTOPIC CONCENTRATIONS IN AQUATIC VEGETATION (IRISH MOSS) >1LGN!m ! UH 811E E Nv1NummLNT AL Ran10 LOGIC AL MONt tadthG v3/16/78 PAGE 23 Sv.aAWV FOR Tmf #Ek!OO 12/18'/76 12/31/77 = MEDIUMg vfGffAT10N. A9uattC U=IT83 PC1/GM MET ANALT$t$ L ().F W LIMIf IN0!Caf0N STAT 10=S HIGmEST STATION MEAN C0hTWOL LOCafl0N8 (70fAL huaREd) 0F OttECTION =F a h, e A =GE. A *) mEAN.RAhGE,Aho
fAh,NANGE.AND (NON.R0011htte fLLu)
>0. nETECifuse No. Of f ECTE Dee aU. DETECTED ** CR*B ( 3)
6. 0 0 E.02 (7.0 4 9)E 1 EC (8.8 a
.3)E I (7.2 & 2)E 1 ( of (7.0 8.8)E t
(
P/ 2)e (Ps n) e( 1/ 1), (Ps 5) *( 1/ 1)e (Ps 5) 4R.89 ( 31 67 LLD LLD LLD ( 0) (6.4 = 7.0)E.) SR.90 ( 3) .17 LLD LLD LLD ( o) (1.9 2.0)E.1 1*l31 ( 17) 53 LLD LLD LLD ( 0) (1.6 3000.c)E.i SE=7 ( IA) 50 (9.1 a 2.0)E.2 EL 66.8 & l.9)E.I (6.8 & 3.9)E.1 ( ol (5.3 100.0)E.2
(
t/ 13)e (Ps 35)
(
t/ 5). (Ps 20) *( 1/ 5)e (Ps 20) M.a0 ( 48) .50 (2.3 & 4)t i MP (2.6 A 6)F I (2.1 & 7)E 1' ( 0) (5.4 35.9)E D (7.4 = 33.5)E D (3.8
38.0)E 9 et 83/ 13). (Ps 0)

(
a/ e)* (Ps 0) *( 5/ 5)* (Ps 0) MN.54 ( 18) (4.8. 05E.02 5 ($42.4 4.7)E =l EC (5.8 4 1.8)E.1 LLD ( a) 80.0)E.3 (3.9 tel.0)E 2 (3.9 Set.0)E.2 et e/ 13), (Ps g) e( g/ 9)e (Ps 0) CO.58 ( 18) 6,11E.02 (5.1 a 2.s)E.2 EC (5.1 & 2.4)E.2 LLD ( 0) (5.9. 100.03E.3 (9,5 104.01E.3 (9.5
10a.0)E.3

(
4/ 13)* (Ps 0) et 4/ 9)e (Ps 03 FE.59 ( 1") .38 LLD LLD LLD ( 0) (1.6 40.0)E.2 NON. ROUT!ht NEFEN8 70 TME Num0ER OF SEPARATE MEASUREMENT 8 wHICH *ERE GREATER e TMAN TEN (10) T!aES THE AVERAGE BACMGROUND FOR THE PERIOD OF INE REPORT THE FRACTION OF sample 8NALY8E8 ftELDING DETECTABLE MEASUREMENTS se l (1.E. >LLD) 18 INDICATED pl?HIN e( AND je. Taf PROSABJLlfY,P. TMAT DETECTABLE MEASUREMENTS RESULT FRDa R ANDum F ALSE PU8111vE ERROR 8 !$ Pa!NTED ALONG8[DE lN PENCENT. l 64
TABLE III-B-4 (Cont) i. 1 l PitCNia 1 0F F 811 E E u t he *E r. f at. h an19Lnt.t C a t mu= f 10=ING 93/16/7f PAGF is i $U*maWV $ 0h fMF M wl00 12/10/76 12/31/77 = MEDlual vtGETatltu. 40ue11C U11TS: PC1/GM =ET ANALYBE5 LO.Ew L!aff INDICaind STAT 1018 MIGME87 SIa11pN = Law -CONTNOL LUCATION8 (701aL hetitu) DF DetELTids
Fad,EANGE,arn mgan.wamGtessu
.Eak.WANGF.aND o (NON.hDUI!H Te (LLH) NU. OEItfILO*e Ad. UEjF(f(D.e NU. DETECIEDee CO*60 ( la) 5.ent =0 2 (1.6 & .5)E O EC (1.9 4 6)E y (6.5 A 1.3)E =3 e,o}F 2 (s.5 = 519.9 )E =2 (1.6 = 51.9)E =1 ( e) (3.0 et 10/ 13). (Ps n) el-e/ 9)e (Ps aJ e( 1/ 5)e (Ps 20) 2N'65 ( 12) .13 (3.6 & l.Ilt at FC (3.6 & 1.1)t at LLD ( 0) (1.2 = 16.7)E =2 (7.9 77.e)E =2 (7.9 77.8)E *2 = ef 7/ 9)e (Ps 01 e( 7/ 7)* (Ps 0) 'l 2R*95 ( IP) 31 (3.0 & 9)E al EL (6.5 & l.5?E =1 (6.5 & -1.5)E =! 20.o)F 2 (2.3 = 66.61E *2 ( p) (l.9 et 7/ 13). (Ps 0)
(
1/ 5)*'(Ps 20) et 1/ ' 5)e (Ps 20) RU.103 ( le 9.u1E.02 (6 2 & 4.5)E.2 MP (N.6 & 2.3)E e2 (9.0 & 2.2)E =2 ( 0) (7.3 - 200.0)E -3 (l.2 = 20.8)E =2 i e( 4/ 13)e (Ps 0) et 1/ 4)e (Ps 17) *( 1/ 5)e (Ps 20) Ru.106 ( le) ~.40 (5 1 & 2.2)E.I EC (5.1 & 2.2)E =t LLD { ( 0) (4.2 = FS.6)E =2 (2.9 7.3)E *1 (2.9 = 7.3)E at 1 e( 2/ 13)* (Ps 11)
(
2/ 9)* (Ps 6) -l C8=134 ( 18) 4.49t=02 Lt p L L L' LLD ( n) (e.6 - 90.03E =) C8=l37 ( la) s.55E=b2 (6.1 & 2.6)E.2 EC (6.1 & 2.6)E *2 LLD ( 0) (4.5 =
0,0)E.3 (1.2 =
18.0)E =2 (1.2 = 1P.0)E =2 a( 7/ 13)e (Ps o) et 7/ 9)e (Ps 0) 84=100 ( 16) 3.7 LLD LLD LLD' ( OJ (9.4 3000.0)E.2 CL=let ( 14 [ .tA (l.0 & 3)E.I EC (1.0 & 3)E =1 (7.6 & les)E.2 ( o) (6.2
30.0)E.2 (1.7 =
19.7)E =2 (1.7 - 18.7)E -2 (1.2 = 12.a)E.2 l et 7/ 13)e (Ps 0)
(
7/ 9), (Ps o) e( 3/ 5)e (Ps 0) CE=les ( 16) 9.83E=02 (1.2 & 11E O# (1.2 & .3)E O (6.6 & l.7)E =1 ( 0) (3.2 = 500.0)E =3 (1.1 a 1.2)E o
(
2/ 13)e (Ps ll) et 1/ ele (Ps 17) et 1/ 5)e (Ps 20) j 4 1 i e NON.Wuuttag NEFfR8 TO THE NumeER OF SEPakaTE ME ABudEMENTS mMICH >ENE GRtaTER TMaN TE N (10) T!*ES TME avEkaGE HaCpGROUND F04 1ME PERIOD OF THE RFPORT se TME FRACTION OF SAMPLE ANALV$ES YlELDING DETELTABLE MEASUREMENTS (1.E. >LLD) 18 INDICATED WI7 MIN e( AND )e. THE PP0$49]LITV.P. THAT DETECTa9(E mea $UNEMENIS t RESULT FROM RANDou FALSE PcettivE ERADR8 38 PRINTED ALONGSIDE IN PERCENT. 65
i I l l 4 1 i l i The isotopes positively found in Irish moss and attribut-able to PNPS releases are Cs-137, Co-58 and 60 and Mn-54. A report of j levels of Co-60 and Mn-54 ten times those of control stations was made to NRC in December 1977 as an anomalous measurement report. This report, found in Section IV, shows that the dose impact to humans of these con- ) centrations is insignificant as a result of the processing and market dilution required before algae is used in food products. Although i there is no significant dose impact on humans consequently, sampling frequency was increased immediately following the observation of an elevated activity. Subsequent to the September sampling, three samples were taken at the discharge canal, along a 100-foot length and on opposite sides of the jetty structure, in early December and again at the end of December. The results showed a further increase in Mn-54 levels from 0.67 to 1.1 pCi/gm, which decreased by more than a factor of five to 0.18 pCi/gm two weeks later. Similarly, Co-60' levels of 2.2 pCi/gm in September rose somewhat in early December (although the three samples taken exhibited a variation of a factor of two among their Co-60 levels: 5.2, 2.7, 3.4 pCi/gm) dropping to an average of 0.6 by the end of December. The activity variations with time are delayed with respect to the variation in PNPS releases of these isotopes (Figure V-A-2) which maximize during the third quarter. The rapid (two j weeks) drop of the early December levels, suggests a transient discharge whose impact was indeed short-lived. 66 l l
l 1 Table III-B-5 shows that sediment samples exhibit highest average concentrations at Duxbury, most of the time. Only Co-60 is found in highest concentration near the discharge outfall (RP = Rocky Point). Besides Zr-95 and Cs-137, Co-60 is the only isotope found in statistically significant quantities above the control station values. Other isotopes have high probability of l false positive readings because of the small number of above minimum values, or their concentrations are equivalent to average LLD values. Figures III-B-2, 3, and 4 illustrate the elevated levels of Zr-95 and Cs-137 at Duxbury and the elevated levels of Co-60 at Rocky Point. The silty character of the Duxbury sediment may cause attachment of the radioactive material that in other soils more readily moves down or away. Plutonium 239 was observed in six samples analyzed, ^ the 0-2 cm slice at four locations and the 12-14 cm slice at Duxbury and Rocky Point. The activity in the surface slice at Duxbury was ten times the activity in the Rocky Point slices and five times the deeper slice at Duxbury. If PNPS is the source of the plutonium, its effect is so significantly altered by the soil type that concentrations are ten times greater over 10 miles distant. Finally, comparison with levels of Pu-238 show that relative concentrations of these two isotopes are characteristic of fallout production rates, rather than nuclear e plant production. 67
a TABLE III-B ISOTOPIC CONCENTRATIONS IN SEDIMENTS I 1 P!LGNI" I ufFSITE ENb1PUNNENTAL kap!0 LOGICAL MON! TONING 03/16/76 PAGE 21-j 8vamANY FON INE PERIOD 12/30/76 12/31/77 I = 1 NED!ual SIDIMENT/8!LT UNITS: PCI/GM DNY ANALY8E8 L0eER Limit INDICATOR STATION 8 NIGHEST STATIDN MEAN CONINOL LOCAflDN8 (TOTAL NUmBEN) 0F DE1ECIIDN MEAheRANGEeAN(5 MEAN,hANGE.AND mEAN, RANGE,AND .j l (NON.NDUTINE)* (LLD) NO. DETEC1thee NU. DEftCTEDee NO DETECTEDee i l Sta?. ( 33) 50 (1.5 & .3)E o cux ( 1. 5 a. 3)E W LLD ( 0) (7.0 172.0)E.2 i
(
1/ 28)e (Ps 3b) a( 1/ llle (Ps 32) R.40 ( G1) 50 (let & 1)E 1 Dux (l.d a .1)E 1 '(1.1 & 1]E. 1 ( 0) (6.1 = 20.2)E O (7.4 16.2)E o (9.0 = 14.8)E O
(
36/ 36)e (Ps 0) et 11/_lile (Ps D) a( 5/ 5)e (Ps- 0)- i MN=54 ( 35) 2.00E 02 (2.0 4 4)E.2 MP8 (3.8 A 1.3)E =2 LLD ( 0) (6.0 31.8)E ~3 (1.3
3.8)E =2
.e( 4/ 30)e (Ps e)
(
1/ m)e (Ps 17) C0=le ( 13) s.09E=02 LLD LLD LLD ( 0) (8.0 = !!3.0)E m3 FE*59 ( 33) .!? (1.3 & 3)E.1 MP8 (1.3 & 3)E =4 LLD ( 0) (2.0 = 67.3)F =2 et 1/ 28)* (Ps 35)
(
t/ 3)e (Ps 13) C0=60 ( 57) (6.5. 02t'=02 1 (3.1 A 6)E.2 Re (5.6 A t.3)E =2 LLO ( ol 29.8)E =3 (8.3
6.0)E.2 (3.6 8.0)t =2 '

(
12/ 52)e (Ps 3)
(
3/ 11). (Ps t) IN=65 ( $7) . 42E 02 (1.7 4 3)E.1 Duk (3.0 A .2N *l LLO e ( 0) (2.0 9.e)E =2 (1.2 = 3.0)E.I
(
5/ 52)e (Ps 7) o( 1/ 13)e (Ps 32) 28 95 ( 57) 5.6at*02 (1.5 & .b)t.I nux (2.1 a 8)E.1 LLD ( 0) (1.9 = 24.Ilf *2 (3.4 44.3)E =2 (1.2 = e.8)E at I
(
7/ 52)e (Ps 1) et 4/ 11)e (Ps 0) RU+103 ( 31) 11 LLD LLD LLD ( n) (9." 4 74.9 )F.a l e NDN.dUU11Nt afetW8 10 lht hWPEN OF Sf P ANelf, MEA $t>hfrENIS mHl(M DENE GW&AftR T w a '. I E r. (10) liath TMt AvtWAGE waCaCHOUNL FON INE PEWIOh DF THE WFP0di se THE FWaC TION OF SAMPLE ANALV8t3 VIELDING OETf CTAbLt mEASVHEMENIS (I.f. >LLD) IS fr.DICaTED p! THIN *( AND )*. THE PkO8sBILITY,P, t>AT DETtCTAeLL PEA 5bhEWENI8
FSULT Ekb> WsNilut F alsf POSIT 1vt. E NWDN S 15 pk1NTF U ALuhGB10E IN PERCE*af.
68 i ___.__.__.______.______.i_____
TABLE III-B-5 (Cont) i l 1 rILGRl* 1 UFF5tlf (Aw!WuNatsTAL AAO!'LUGICat MLA! TONING 03/16/78 PAGE 22 ) .tv eswy sus Tmt PE3100 I2/30/7o 12/31/77 = MEDIUMS SEblatNT/81LT UN!i8g PC1/GM DNY AN AL Y bE S LOaEN Lim!T INDICATON STATIONS MIGNEST 8tef!DN >EAN CONTRUL LOCATIONS (TUT AL MumREW) (s F DETELT!uN PEAN,WANGE,An* .E Ar., R A NGE, A &D PF ANe WahGE e 4ND l (NON.wuuT1 +E ) * (LLp1 r/U. OETECTED** NO. DETECTIO** hu. nE TE C TEDae ' j RU=106 ( 33) .14 (1.1 4 3)E =1 DV8 (1.1 & 3)E =1 LLO ( a) (5.n. 27.7)E.2
(
1/ 28)e (Ps 15)
(
1/ 31)* (Ps 32) CS=334 ( 57) 1.khE=92 (1.4 & 6)E al evu (3.2 & .f)E *1 LLD ( I) (7.0 37.1)E =3 (a.4 11.6)E "2 =
(
3/ 52)* (Ps 22)
(
1/ !!)* (Ps 32) CS=137 ( 57) 1.62c.92 f5.a A 7)E =2 uva (1.0 a .1)E. L.L u ( 9) (l.a = 2.9)E =t (1.2 = 15.n)E a2 (2.3 = 15.0)E =2
(
35/ 52)* (Ps u)
(
11/ 11)* (Ps 0) CE* lot ( so) .27 (7.0 A
1. 4 ) t. - 1 Ovx (7.0 a 1.4)E *t LLD
( 0) (1.0 152.0)E =2 (5.6 = 8.a)E =t (5.6 8.4)E =I =
(
2/ 29)* (Pw 25)
(
2/ lt)* (Ps 8) i CE=lau ( 56) 6.d7E=92 LLO LLD LLD ( u) (7.M e60.0)E +3 = i PU.238 L 6)
9. ele *ua LLp LLO LLO k
( o) (6.0 =
29. 0)E
+4 PU=239 ( 6) (1.o & ,a)E 2 0U1 (2.2 & 6)E =2 LLD ( 0) (3.3 = 26.0)E -5 (3.6 2.8)E =2 =
(
6/ 6)* (ks U)
(
2/ 2)* (Ps 0) l i Nus-advilht HEFFNS To TMf NuaHEp 0F SEPARATE *EASUAf>ENIS aMICH *ENE GWFATER T>&N TE N (10) T!*ES THE AvtWast PACmG20VND FOR THE PEW 100 0F THE NEPONT j
THE FWACT!UN OF SAMPLE ANALVSES TIELDING DETECTABLE MEABU8EMENTS 1
(1.E. >LLD) IS INDICATED *ITHIN *( AND )*. TMP PROMA8ILify,P, IN AT DETE C T ABLE PE ASUREMEN18 J RESULT FNO4 WAN00m FALSE POSITIVE ERRORS IS PRINTED ALONGSIDE IN PERCENT. 1 l i i i i l 1 69
n. X C uE = nD S i P i M n. i uV N i O O n I i N g T i T A u. O T i L S iT P nC o E + O g H = i T H 1 n. i 1 n i P F P L oE O ii S N s g E O i G I m. N T iG A R nU R i T i R S i E H g n T X iY i = iL E B uU D L J I n 7 P i 7 S u 9 T N nE U 1 O T N O N mU I T uJ S E Hdng E A M 1 i - R T I S B D u i 1 o M E Y S uR U X nM N = 0 i 6 g Y i T H s G D u. I R V C oP N I nA i T O g C I i R T n. A nR E T iA T S i M A n C M g I n. D = n N i B i I P U i E R I s F i S M g E N N I i U O O n. R L I I G uN A T T L uA V A A I n J T P i I S S - ____ b ~
:~
~._i:
_~
2 2 2 2 2 3 0 0 0 0 0 0 E E E E E E 0 0 0 0 0 0 0 5 0 5 0 0 8 6 5 3 2 5 r E$ s ~ o a. ao
n. X . C . E = .D X U g D n. .V N g .O O i N I n T i T R n. O T L S .T P nC .O o E + g H = T n. H .P F G nE O . S N g E O G I N T n. .G A R .U R T i R S n E g H n - T X .Y = nL E B .U D nJ L I i 7 P g 7 S T i 9 T n N .E 1 U O N D n I N .U T E J S M n u uu n R I 1 g R T E l i n. B D S u M - E S .Y .R U X 5 i M N = n g Y H 9 T L u. R I P Z .R VI N nP . A T O g C I n A TR n. R E T uR T S nM A - i C M4 g ID = n.. n N .B I P P .E R M I F o S M I g E N N n U O O R n. L I I G .N A T T L nA V R R I J T T P u Z S S - :::5_:: ~
5:__:
1 1 1 1 2 0 0 0 0 0 E E E E E 0 0 0 0 0 5 6 7 8 0 4 3 2 l 9 0 rE@s on. aP
n. i nC uE . D g n. V nO i N u T A g O T L S nT P iC n E i O g H = i T i t i i 1 . P F G .. E O .n S g E O G n~ N T i. nG A A R T uU . R E g H T oY L E
n. U D
. J I 7 g 7 S i 9 T nE U T 1 ..N O N E .U E .J S M E l i rig E I u! l n R D n B S l l 1 i ; i M Y nA U N 7
n. M 3
1 g Y T n. S I C R V P I nR i T O C I g R n. i .R E T nA T S . M A g C I D N .B I P . E I . F S M g E N U O I L I R nN G A T L .A V A J n I P Z S 5:__:~- 1 1 1 2 2 0 0 0 0 0 E E E E E 5 0 5 0 0 2 8 3 0 5 2 1 1 9 4 O E $b o a.. y
1 I C. DIRECT RADIATION 'i 1. CONTINUOUS THERMOLUMINESCENT DOSIMETRY Tables III-C-1 through III-C-4 show monthly and quarterly average doses from direct gamma radiation in r/hr at thirty-nine stations located on and off the PNPS site and at two shielded control stations. Monthly doses are measured in accord-i ance with requirements of the technical specifications in effect prior to April 19, 1977. Following that date, the quarterly average doses were required. Both monthly and quarterly dose rates are pro-vided. Thermoluminescent dosimeters (TLD) of the CaSO4(Dy) type are used to record direct gamma radiation from all sources including l direct and scattered radiation from Nitrogen 16 in the turbine building, and cosmic and other natural and artificial gamma i radiation. In addition to average doses for each TLD each month, ) geographic regional average doses for sectors of different nearness j are computed; viz, in immediate proximity to PNPS, more distant but near the site boundary, up to several miles away " neighborhood", and far away (background). Each month's data (bi-month for April / May) show consistent trends; the four near plant dosimeters (OA, PB, PA, WS) stand out among all readings and have an average well above the dose rates further away. New locations will be included in 1978 to reflect construction changes. The next region has a lower average dose rate, and beyond 0.7 mile (distant neighborhood and background) the dose rates are statistically consistent. In one month the dose rate drops'by a factor of three immediately away from the plant and remains near that level as far away as the most remote background 73 - _ = _ _
aji iIj
!ill]I 16018709962301031 5052063707901 195229871 00 A
60007014990766038807156908905318966708000 m G 01 01 011 20010000101 0041 1010010111000011 100 0033 I 7337 S 2 1000 7 =
= = = - - = - - = - = - = - - = - = - - - - = = = = =. - - = - - - - - - = -
7 + + + + + + + + + + + + + + + + + ++ + + + + + + + + + + * + + + + + + + + + + ++ AW 7 / R - - = = 7 R U + +++ 9 P O A H 96099220752083038506799102583744767170982 1219 1 / 61004328442907096703777531492577511717890 0772 R O 70098883900688000101229701927002977900012 4088 Y R 1 1 11 111 1411 1 1 1 111 121 21 A C I M M / R 97760942205658041 002713086441819200069600 P A 72066570929697818907680217033111887672900 A M G 01 100001010000010000412121112211100111000 5625 8335 I S 2 1000 7 7 - - - - = - - = = - - - - - - = - - = - = = - = = - - - - - - = - - = = - - = - = 7 7 + + + + + + + + + + + + + + + + + ++ + + + + + + + + + + + + + + + + + + + + + ++ 9 9 1 1 R - = = = R U ++ ++ A O R M H 78881 70942971 398120530782936691 1264140857 7064 A / 36492225889441591307527806979357327742045 6273 R ~ M O 788781810138919211 0973994122931 4397192011 5208 R 11 11 1 111 411 1111 11111 1121 211 C I 7 M ~ 7 9 6595791 8509731899463750323441 934011 595700 1 A 57087869857757458265592881298990965415800 A M G 00100000000000000100402001100001000111000 0606 B 1 8225 E 5 2 1000 F 7 = - = - - = = - = = - - = = - = - - = = = = = - - - - - = = - = - - = = - - - = - 1 7 + + + + + + + + ++ + + + + + + + + + + + + + + + + + + + + + + ++ + + + + + + ++ 9 1 C 7 R - = = = B U 7 ++ ++ E O I 9 F H 1 80140923425674748413058881 13366358682674 5767 I 1 1 1 9 5 4 1 8 6 5 3 8 3 2 9 8 9 2 5.R.7 3 8 8 1 / 67006409224278844 9056 R I O 6787777017877668926541 1893217090967201011 4077 N H 1 1 412 11 1 1 1 1121 21 C E A I L J M BA - 262865720627004065630261 85976138989854900 A 63564659947525674544102903674856641879600 T M S G 0000000000O000000000311010000100000001000 3083 E I 3213 S T 2 1000 A 7 = = - - - = - - - = = = = - - = - - - = - = = - = = = - = = = = = = - = = = - = - - 7 + + + + + + + + + + + ++ + + + + ++ + + + + + + + + + + + + + + + + + + + + + ++ R 9 .A 1 E R - - = - T N U + +++ A R A O D U J H 1 9451720041 403635756539795188664945506511 E 8893 / 78400699671988190287040152103163529239806 R 8432 G S R A N O O 44575359746424456644586575775s57742757621 6654 I R S P 2 1 1 D 1 S C O I X I I M E = R F E P T N A O S C I I I N H D O N T T I I PRSRWSBEP5PCAPSRDBufAABHABC0EFCHIJKLLSBLL ) A T CCCEEK = M " # NPSSSmBEFuOPPW PWHRR I 0. I A S )M 0 7 G I5 0 D 5 V M A A 76 0 )
0..
R L I 6 0 N 5 9.I A ) F T N
2. ( M O
O 6 C D 12456001235678923467890'123567890123f56789 D3 I
1. (A O 2 S E
N 0000001 11 11 11 11 22222223 333333334444444444 G E. 00000 000000 000000 000000 000000000000000000 E - EO-T ~ R E 22222222222 222222 222222 222222 222222222222 I T ~ ~ R 0R H8 A T ~ 1A R( R D C T BD I nN NN E ~ Tt AO U R ~ P LI TO U I PS NR E ~ ~ ~ 232222 332212 C NL TK S N R ~ U AG 324 24 43)3 33)433 22232111)222 O O P G AC SC Z X. W EXIA NE DB E-y e. 1 Il ply
S 2 7 =
- = = = = - = = = = = - = = = = * - = = - = - - - = - = - = - = = = = = - = -
7 + + + + + * + + + + + + + + + + + + * + + + + + + + + + + + + + + + + + + + + + + + 9 7 1 7 T R P U 9 E O 1 S H 888404340223233 63 65286025994994971 9739950 / 43228601 6465767091 977771 8751 0499801840220 R T O 80991 881 09876870907861 889801 122989809901 1 P R 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 C E I S M 7100760778 09804 0264441 903593 0094291576400 7 A 66889602786440567647978880585867105618800 N 7 G 00000001000000000000001 001 0000001 1011 0000 9 I S 1 2 7 = = - - = = - - - - - - = = - = - - - = - - = * - - = - - = = = - = - = - - = = - - G 7 + + + + + + + + + + + + + + + + + + + + + + + * + + + + + + + + + ++ + + + + + + + 9 U 1 A R G U f O tA N 522R290051 1 62051 894283291 81604857578201 42 / 87526204121880795766612285175461 404385066 7 R 7 O 679887009996606998783968988880998R7982900 9 R 1 1 1 1 1 C 1 I M Y L 250821371 821 905399866341 43358824696583400 A U 57350872921760998821 561 999948315429188500 M J G 001 1 31 21 01 1 00000001 131 200001 01 1 1 11 01 021 00 I S 2 2 7 7 =
- - - - = - - = = - - = - - - - = = - = - - = - = - = - - = = - = = = - = = -
7 + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + ++ C 7 9 9 1 T R I 1 L U I U O I E J H 03755302799360756n4851 2056609587571 277261 / 28099371955540425608292649243423975227256 N p E U 0 98290012901770831 1 01 0550301 393242992301 00 R 1 1 11 1 11 1 1 111 412111 1 1 1 1 1 1 1 1 21 L J C B I M A - T 1751 961 208761 0997761 0366221 600921 3 5000900 S A 858885524424100847905100861 16649861 17700 1 E u T G 00000001 1 1 1 01 01 120014121 1 11 121 1 10001 11000 I A S R 2 7 = - - - - - = = = - = = - - - = = = = = = = - = = - = - = = = = - - = - = = - = - = 7 + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + E 9 R 1 R U N U S U O J H 776736045364901740866831 9677768336764951 4 O / 56272519632750425941062923768200634697843 P R O 88879780903780021 9811 6293201 02341 8700001 1 X R 1 1 1 1 1 1 141 2 1 1 1 1 1 1 1 1 1 1 121 E C I M N O I TA N O I PRSRdSBEPSPcAPSRDBmTAABHA8CDEFGHIJELLSBLL I T CCCEEF M 8 mM4 PSSSW BEE 4OPPk PW HRR D A A T S R T C ~ E ~ 234W44432 R D 124568 01 23567092341 8901235678901 67847 W 0606001 1 1 1 1 11 11 22222233333333344444 I 06060006000000060000000006000000000D00000 D U 2222222222222222121 1 222222222222222222222 L ~ ~ T E N O 324244333333433222321 1 13222232222332212 - - Z JW
.I i, i ,I s k l 90 m O @ @ P* @ eD C e N N W e CD O O N ed & W art @ r.*= P-m e @ O w O O m.e r- @ r= @ N 9 O O m 4 b O ep e.N.@.e.**eO. O. @ee. @. e. O. E e== r=. 4. e* r=..*. m. m.we e. O. N. m. m
e.,.e r=. $. e. o. O.
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i ) i station; other months the dose rate drops more slowly. In all cases, the near plant levels are distinctly higher than those off-site and off-site dose rates are not significantly sensitiveLto distance variations beyond the site itself. Thus, beyond the k " exclusion area" (for this purpose, the 0.25-0.7 mile region), dose rates show no significant plant effect; populated areas are there-fore beyond the limits of elevated dose rates. Indeed, direct.radia-tion dose rates near the plant vary by a factor of two from month to month, and are accompanied by variations in more distant loca-tions of 20 percent which includes statistical error. Quarterly average doses show the same characteristics; the four near plant locations are obvious, while the background dose rates are not distinguishable from the remaining values. 2. FIELD SURVEY A direct radiation survey of beaches in the vicinity i of PNPS Pilgrim I was conducted on 13 April 77 using a high pressure ion chamber (HPIC) Model MDL260, Serial Number 007(4) The design and calibration of this instrument were described in the report of the survey of June 1976(5) The present survey was designed to detect differences in the external exposure rate encountered at beaches near the plant i (Plymouth and Priscilla/ White Horse) and a control location (Duxbury). At each measurement station, the instrument's noise level (apparent background rate) was observed both before and after each set of measurements. The actual measurements consisted of fifteen observa-tions of the digital exposure rate display at one minute increments. 78 r _____..._.___.__.-_________.._.____mJ
f i l These readings were generally consistent, as evidenced by the small error associated with each near value (Table III-C-5). A check source was employed to verify the instrument's accuracy, one check was performed for each measurement. All checks indicated that the HPIC was accurately monitoring exposure rates. The data (Table III-C-5) indicate that Plymouth Inner Beach is not significantly different from Plymouth Outer Beach. Since any postulated impact of the plant via particulate deposition would probably affect one more than the other, the absence of a significant difference indicates the absence of a plant impact. Moreover, Priscilla/ White Horse Beach has significantly lower expo-sure rates. In fact, this latter beach exhibited a dose rate lower than that of the control station in Duxbury. The measurement at Bert's Restaurant Beach, which is contiguous with Plymouth Outer Beach, indicates an increase in natural background exposure rate from the many large, granite boulders on the former beach. This measurement was made specifically to quantify the exposure increment expected from the presence of these granite boulders. This survey indicates that the natural background exposure rate at ttaches near Pilgrim Station is probably 6-7.5 R/hr and that an increment of at least 3.0 R/hr may occur from proximity to granite boulders. These results are in complete agreement with sim-ilar measurements performed in Maine (6), where the natural background i 79 l
1 l exposure rate at shoreline locations was found to vary between 6.6 ) and 14.5 R/hr. These exposure rates were also found to vary directly with the size and proximity of granite outcroppings (6) TABLE III-C-5 FIELD SURVEY EXPOSU:7 RATES EXPOSURE RATE LOCATION ( R/hr) Duxbury (Back River) 6.610.1 Plymouth Beach (Inner) 7.610.1 Plymouth Beach (Outer) 7.4+0.1 Bert's Restaurant Beach (Plymouth) 10.5+0.1 Priscilla/ White Horse Beach 5.9+0.1 (behind "Beachside Tavern") ~ l l l l f t 1 i I l 80
i IV. ANOMALOUS MEASUREMENTS During the year 1977 there were three (3) anomalous measurement i i reports submitted to the NRC. These reports were required by PNPS j technical specifications when indicator station samples exhibited radioactivity levels in excess of ten (10) times the measured con-i centrations in the control station samples. l In some cases, a report resulted from unusually small minimum detectable levels (with no observed activity) at a background station j so that a very low indicator activity could be ten times greater while itself an insignificant value. Such sensitivities were well below those required by the technical specifications so that those a " anomalous measurements" were caused by administrative rather than radioactive sources. l t In each case, the observed radioactivity had an insignificant I 1 dose impact on the public as indicated in the following report of I each measurement. l 81 L_____________________.______
i LICENSLL LVENT HLPOH1 CONTROL sLOcr: l l l l l l l@ (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATION) i 6 l M l A l P l P l S l 1 l@l 0 l 0.l - 10 l 0 l 0 l 010 l-1010 l@l4 l1 Il ll l1 1 1 U @ o i 7 8 9 LICth568 COD ( 44 lb LICENsf NUMulit 26 26 - LICENSL TYPE JO 67 tAl be CON'T loIiI Z,] Jl 0 l 510 l - l 0 l 219 l 3 l@l 11011 l417 l 7 l@l1 l1 l0 l4 l 7 l7 l@. 7 8 60 4. DOCK E T NUMU E R G8 63 EVENT DAf t 74 15 REPOHloAft 60 EVENT DESCRIPTION AND PROB ADLE CONSEQUENCE 5 O'o Io l2l l On October 14, 1977 it was confirmed that the activity Of the weekly a'ir particulate' i
sample taken from Plymouth Center on September 30, 1977 was at a level exceeding 10 l
,,;,,; times the control station value. Pilgrim Station was shutdown for maintenance and ] , refueling during this collection period and subsequent analysis indicates that the j g o g ; g evaluated activity was not due to ef fluent from the station. } Loll! I I I o I ft I ! l l ' NEE sue o'or sNr CO $ BC E COMPONENT CODE Loll! I x l x l@ Lc_J@ Lz_J@ l z l zl z l z l z l z l@ LJd@ tzJ @ 1 8 9 10 11 12 IJ 18 49 20 sf 0utNTIAL occun nt Ncg natoni RE Vl5foN LE R PO ,tvtNTvf4R nt Pon T No. CODE TYPE No. @,agPg l21 l 7l [J 10 13 l7 l y l0l4l y [] W 7 21 23 24 26 27 26 W 30 36 32 nouRS h 5 8Ly'Y_J @ LN,j@ [j(j@ [Zl9l9l9i l Ak f AC1 o oN PL A T 1 FoF l bl 6 $u PLit MAN FACTUR$R I LZ_J@[z_J@ [z.J@ LZ J@ l ol 0101 ol D 34 h 3b 31 40 44 42 43 44 4 CAUSE DESCR'PTION AND CORRECTIVE ACTIONS j i j o l l A radioactive cloud of debris from nuclear testing was reported to be passing over [TTG l the Northeast on September 23, 1977 per telephone communication from the NRC. Since recorded plant releases were small for the period in question, the cloud was l probably the source. i 4 1 1 1 a 9 e< otutasTATus @ Es5S$ oiscovaRv ossCaieTioN @ 's"'A'I7s* ..cowan W@ l 0l 0l Ol@l N.A. l W@l Analysis of Particulate filter i ', A T.V4 f y C f(NT HELE ALED Of 64 ELF ^%f AMOUNT of ACrivlTV LOCAfsoN oF htLE ASE y y @ W@l N.A. l l N.A. I P(NLONNik f xPOSuelt$ Nut tilt n TYPf Df 5CHIPfioN ITT71 101010j@U@l N.A. i P(filONNEL INJu fit $ e Nu'.ite( le DEbCIUPf ton Q l0l0 gj@l N.A. ii o Loss 08 On DAAtAGE 10 FACILif y YvPE DE LCletP I'oN W W@l M.A. 7 5 U 10 6' Q hsurs @ Sa'ICniPrioN @ NRC USE ONLY i% l N.Al l l I I l l 1 l l l 1 l l l' F si D to GW 60 P-NAME OF PHEP Afif ft PetONE: ~ ~ { 82
I ) i l l I BOSTON EDISON COMPANY PILCRIM NUCLEAR POWER STATION ) DOCKET NO. 50-293 ) Attachment to LER 77-37/04T-0 I 1 While conducting the gross beta radiation analysis of the weekly air parti-culate sampics for the period of 9/21/77 to 9/28/77, it was determined t' hat the filter removed from the Plymouth Center sampling location (4.5 miles W-WNW of the station) exhibited an' activity level exceeding ten times the value of the control station located in East Weymouth (23 miles west of the station). 1 i The gross beta activity level at Plynouth Center corresponded to an average 3 weekly airborrie concentration' of 1.060 i 0.012 ' pci/m when measured on 9/30/77 and 0.76 t 0.02 pC1/m3 when mgasured on 10/11/77 while the control station value was 0.062 t 0.004 pCi/m for the same period. I Subsequent to this determination, a gamma isotopic analysis was performed which indicated the presence of 1 131 (0.11 t 0.03 pCi/m3), Zr-95 (0.23 t 0.08 pCi/m3), Ru-103 (0.03 i 0.03 pCi/m3),and Nb-95 (0.13 i 0.03 pCi/m ), 3 l 1 On 9/23/77, Mr. Architzel of the NRC called C. J. Mathis of Boston Edison to inform him that a cloud of radioactive debris was due to pass over the station on 9/23/77. In order to determine if the elevated environmental activity level was due to plant operation or the radioactive cloud, the ef fluent release data for this period were examined and are attached as Table 1. These releases, combined with the average meteorology for this location for the period of time.from January i to June of 1977, result in calculated concentrations that are at least 20,000 times below the concentrations indicated by the sample. In addition, the sample taken at the overlook Area (0.03 miles west of ie station) did not exhibit elevated activity levels. The Pilgrim Station has been shut down for maintenance and refueling since 8/6/77 Based upon the above information, we have concluded that the observed elevated environmental activity levels are not due to releases from the Pilgrim Station but to some source unrelated to the plant (such as fallout). 1 l l 83
1 l
l 1 j i Table I l PILCRIM RADIOACTIVE EFFLUENTS j PARTICULATE AND IODINE (for the week of 9/21/77 to 9/28/77) Microcuries j I Main Stack Reactor Building Vent I-131 1.43 E+1 3.34 E+2 l Mn-54 3.97 E+0 1.75 E+1 l l Co-60 1.49 E+1 8.40 E+1 Cs-134 1.81 E+0 1.05 E+1 Cc-137 9.75 E+0 1.92 E+1 ) Ru-103 2.00 E+0 l l i 84
) -1 l l LICENSEE EVENT REPORT c'oNT' tot eLOCK-l } l l l l (PLE ASE PRINT CA TYPE ALL REQUIRED INronMATIONI { lM l A IP lP lS l1 lg:u0 l 'O.) -l 0 } 0l 0 l 01 0 l - l O l 0 l@l 4 l 1 l 1 11 l 1 l@l l l@ j ,o uwni. i..,e i. um.n ienn a A, uuNst nes au 65 c A i se } (oN T l lolil. gl',ns [jLj@[015101 -l Ol 21913 @l 1 l 1 i O l 21717 l@lIl1l0l7l7l1j@ bt 01 ,,0 A & T '.vwJ t it bH Li'J t vi%10 A TE .4 ?) ngegpTDArg 60 g 7 6 EVENT DESCRIPTION AND PnOR ABLC CONSE0VENCE$ h On Noverber 2.1977 the Boston Edison Co. was informed that the results on a I
o ;,, i l Cranberry rwple taken October 4, 1977 at Bartlett Pond Dog show concentrations in l
l gg ) execss of 10 times the minimum detectable activity of the control station value f i n j,,, ; for La 140. (refer to the attached Table), l gi I l 1016 I L I l 4 fo~lT) { 1 l 1018} [ SJ cToE cN[ s eYo$e couroNENT Co0E S SU IX F 1@ L,,cJ@ LZJO Iz Iz lz 1212 Iz l@ UBCChi0 6 N.. O FJTin n io u u i. St 0VE N TI A L QCCUR9fNCE etPon1 Pf vtSto*e @ [M A 8to .IVfNTYEAR Ht'OHf NO 000E TYPE No 'f.(*,', [717 l [--J l0 l3 } 8 l y 10 l4 l W b y ( .~ u u n v u o so e u 'fr$ A 0 Y I H0VHS 8 i FO us. Supp i MA fACTupfR tzJGLZJ@ L2_jO LzJ@ lo lo 1010 I LvJ@ LN__JO L2J@ Iz 19 I $ 1 9 f' .a s n a <a e n sa u I cer.t ossuuPriov ANo connFCTIVE ACTIONS h l The ratio of ZR-95 to NB-95 is characteristic of fresh fallout. A c1 ! of radio-t j i, icj j active debris from nuclear testing was reported to be passing over the aren just i g,i,,y prior to the collection fate and, since Pilgrim Station had been shutdown for eight [ ,,, ;,, g g we'eks. in the most probable cause, g I FrTTI I li4 ? t 0 SIA SPOWtR C?NERSTATV$ . OtSCO V DiscovEnv DISCniPTiov N.A. I LnJ@l I l i i t. i ljij@ lo 1010 l@l a " J,,v,1,
edhs, Auovyt or Activity @ 1 toCAvioN o, ett Ase h
. rrm LzJ @o esnrtrmL1JOI ataw x^- I w ^- I innua, l n.W.'un omn,,,,os @ I w.2 n.c N ^- I LLUJl0I I J@Ll]@l ,rmd'isd.? cs b<il010101@unm.,,es@ , =... l N.A. l i u 'Of " $,fE0A[^#'"" @ l t W,A. I i'l"l W hl so a > n Mgfl if CO#f f Pv N A-l lll1l1llIIlll M b, jhl o o Charlen.1 "athi" ' ' ' ? -7 4 6-41 M r-l l f 85 l l C
1 l c g i j l' BOSTON EDISON COMPANY PILCRIM NL' CLEAR POWER STATION DOCKET NO. 50-293 j At'tachment to LER 77-38/04T-0 j l Table'I s Cranberry Analysis I i ) Sanple # 7932 7933' ] c Collection Dato 10/4/77 10/4/77 i Loe n ti on llallrax Bog
Bartlett Pond Bog Isotope Rcoul.ts (PCi/1)
MDA Results PCi/1 MDA Cs 137 .005I.005 .007 .035I.003 .005 Cn 134 .000I.005 .008 .001I.003 .005 Mn 54 .000I.004 .007 .003I.002 .004 Co 58 .001I.004 .007 .006I.003 .006 Co 60 .001I.005 .007 .005I.003 .004 j Fe 59 .007I.011 .020 .001I.007 .011 i 1 Zn 65 .002I.009 .015 .003I.005 .008 Zr 95 .015I.001 .020 .061I.007 .009 q K 40 1.500I.110 .070 .940.005 .040 j Ba 140 .000I.'020 .030 .214I.014 .020 l La 140 .020I.002 .020 .300 .011 .006 Ub 95 .003I.004 .007 .050I.004 .00' I 131 .006.004 .008 .052I.004 .005 l Ru 103 .005I.004 .007 .048I.003 .005 l 1 .i
llalif ax Con is the control station
(- s y 'i 86 l a u_-_____---- o za
1 l l I LICENSEE EVENT REPORT cONrnOL eLoCie l l l 1 l 1.l@ - (PLE ASE *e . wR TYPE ALL Rh0 VIREO INFORMATION) i 1 i Io Iil lM I A l P l P lS l 1 l@l 0 l 0-l-l 0 l0 l 0 l 0 l0 l-l0 l0 l@{4 l1 l 1l 1l 1l@l l l@ 1 3 et 9 LtLLN5t( LuML 14 t's LICLf454 NuflDEH 26 20 LiCkNbi t yrt JO 6 7 C A T 68 i CON'T lnIii g[,, Ql 015 l o l-10 l 2 l 9 l 3 @l1 11 13 l0 l 7 17 }@ll 12 10 IS II 17 l@ J P 6 Gd I,6 DoCE RI NUMU(n 68 fs0 EVENT DAf g 74 ?b n(PoHT DAf( Bo EVENT Of SCHIPiiON AND PROHA8LE CONSEQUENCES Q gl On November 30, 1977 the Yankee Environmental Lab informed the Boston Edison Co. of results on samples of mussels and Irish Moss taken from the Pilgrim Station discharp 9 3, 1 outf all which confirmed Icvels in excess of 10 times the control station value for ( g,,,, 9 Mn-54 and Co-60. The dose commitment resulting from the presence of the measured amounts of these isotopes for the period in question is not considered significant. I gog,g 10171 I [OlHl l $YSTEU C AUSE C AUSE COMP. VALVE CODE Coof suucoof COMPONENT CODE susC00E SuoCout t,o I u i I x I xl@ [c_j@ Lsj@ l z I z l z l z I z I z l@ (fzj@ 17 j @ i, io u o i. ,o a b6 QUE NTIAL oCCVnitt I4Cl (IC Pon t HtvlSION Lin no VENFYEAR REPQ1tT No CODE TYPE No l @j'yag (17l7l [J l 0 l 4 l2 l y 10 l 4 l W (--J W _ 26 n 2J 24 16 27 24 29 30 si 3J 1 Aut f ACT N ON PL F IE T HoVP5 3I iT T fo i vu Su PLit MAN FACTURER [L.1@L7.J@ L,7JO Lz_J@ loIoIoIoI LY_J@ lN J@ Lz l@ l z 19 l 919 ' 31 40 di 42-43 44 si JJ J4 f. 3t> CAUSE DESCRIPTION AND CORHECTivE ACTIONS @ liluil The Cause of these observed sample activities is considered to be frj m releases I iii,,l from Pilgrim Station during the past quarter (July, August, and September. 1977). I I TTTA L FTTil l I I 'm f BU s a o otHan status @ Es'CN oiscovEnv DEsCniPnoN @ 's'r#00[ .powen [TTrl W@ l o l o l oJ@l N.A. l (_D_j@l Notification by Environmental 1.ab l A f tVIT Y CO ttN1 lif Lt Ar(D of nt Lt ^5' AMOUNT 08 ACitVITV LOCAflON oF nELEASE i M.A. I l N.A. l l l ri l @l e 9 au ni 44 45 60 PE RhoNNEL F RPD' uML$ Nuf.'ltf H TVPC Df 5CHIPTION - N.A. l IIl2l 10 l0 l OJ @ ] @ i" Pt n. anne {'iNjuEt s utscnipsinNh s man n i.- l0 l0 1 0lhl N.A. l so 7 m o si ir L O'e,5 of f)#t DAM At.f is) 8 ACILI f V iv t IW.u uP 1 ton N.A. l $ d@l a u m so Punou s v NRC USE ONLY le gyg g,@t>(M.niptiON U, ( jl. A. l [llIIIl1lIIII 8, .e r,.. so o charl es.1, Ma thi 3 pnonE 1 -617-7 4 6-t.161,. Nws Or PnErAnto 87
R I BOSTON EDTSON COMPANY l PILCRIt! IRICLEAR POWER STATION Panc 1 of 2 DOCKET NO. 50-293 l Attachment to LER 77-042/04T-0 While conducting the sample analysis required by the Pilgrim Radiological En-vironmental Monitoring Program Technical Specifica tions, it was determined on 1 11/23/77 that concentrations of two (2) isotopes in two (2) indicator sampics existed in excess of ten (10) times the minimum detectable concentrations (MDC) at the control s ta tions. The indicator sampics were Irish Moss and shellfish (mussels) taken from the plant discharge outfall on 9/29/77 and 9/22/77, res-pec tively. The concentrations of Mn-54 and Co-60 in both of these sampics exceeded the control station MDC values by factors of 19 to 220 as shown in Tabic 1. The elevated concentrations in shellfish were verified by a confirma-tory. analysis received on 11/30/77. In the case of Irish Moss, the levels of both Mn-54 and Co-60 in the Manomet Point indicator sample ucre significantly lower than the levels at the discharge outfall. These concentrations were 45.0 pCi/kg and 44.6 pC1/kg, respectively, which are only 25% above the MDC values at the control stations. In the case of shellfish, Mn-54 was not detected in the indicator sampics from Pipnouth liarbor or Manomet Point. Co-60 was detec ted in indicator samples f rom these locations in concentrations of 3.64 pCi/kg and 11.0 pCi/kg, respectively, which are significantly below the levels at the discharge outfall. These con-centrations are 0.8 and 1.5 times the 10C at the control station, respectively. Analyses of the shells of the muscel samples taken at the discharge outfall indicated no detectable Mn-54 and a very low concentration of Co-60, specifically 6.40 + 1.37 pC1/kg. The liquid radwaste discharges from the Pilgrim Station for the first three (3) quarters of 1977 are listed in Table II. Since the concentra tions of Mn-54 and Co-60 were not excessive in the environmental sampics of Irish Moss and shellfish taken on 6/29/77 at the discharge outfall, we have concluded that only the releases for the last quarter (July-Sept.) could have contributed to the observed sample activi ties. This conclusion is consistent with the releases of Mn-54 and Co-60 for the third quarter being higher than those of the second quarter by factors of 4 and 3.5, respectively. Dose Impacts The average discharge concentrations for the third quarter for Mn-54 and Co-60 were small fractions of the limits set forth in Appendix A to 10CFR20 for release to unrestricted aruas (specifically 0.02% of the limit for Mn-54 and 0.22%.of the limit for CO-60). The annual dose to an adult individual resulting from consumption of 5 Kg/yr of shellfish with the measured concentrations of Mn-54 and Co-60 would result in 0.2l mrem to the GI tract and 0.24 mrem to the total. body calcula ted according to the methods described in Regulatory Guide 1.109. Due to the processing and market dilution inherent in the preparation of Irish Moss for human consumption, it is not considered a potential source of signifi-cant dose to an individual. 88
l i page 2 of 2 Conclusion In summation, there is evidence that radioactive liquid releases f rom the Pilgrim ) Station during the third quarter of this year resulted in significantly elevated j levels of Mn-54 and Co-60 in shellfish and Irish Moss in the discharge outfall area. Concentrations were low or undetectable at all other indicator stations. Finally, the dose commitment resulting from the presence of the measured amounts of these isotopes for the period in question is not considered significant. l t l 89
i ) i I TABLE I CONCENTRATIONS IN ENVIRONMENTAL SAMPLES pCi/kg ) Irish Moss Shellfish ~(mussels) .g Indicator ( ) Control ( } Indica to r( Control ( Mn-54 667 i, 26.8 35.6( ) 183 t 3.3,5(') 3.99(0) Co-60 2160 1 52.0 36.2(4) 989 7.23(5) 4.50( ) Notes 1. Sampic taken at the plant discharge outfall. 2. Sampic taken at Ellisville 3. Sample taken at Narshfic]d 4. Concentra tion was below Minimum Detectable -Sencentra tion (MDC). Value -] shown is MDC. 5. These analyses were confirmed on 11/29/77 at simi.lar Icvels. Mn-54, 152 + 5.37 ~ p?i/k}',and Co-60, 794 + 9.81 pCi/kg. i l 1 I i l I -90 1 _ _ _ = _ - _ _ _ _ - _
- - - A
TABLE II PILCRIM. STATION LIQUID RADIOACTIVE EFFLUENTS CURIES Quarter 1 Quarter 2 quarter 3 Wuclido Jan-March April - June July - September Sr-89 5.13E-4 7.72E-2 4.19E-4 Sr-90 3.21E-4 1.20E-3 1.35E-3 l Cs-134 5.43E-3 6.54E-2 5.35E-2 1 Cs-137 1.65E-2 1.22E-1 1.44 E-1 l 1 31 1.72E-2 1.78E-1 3.01E-3 C0-58 1.0CE-3 2.58E-3 1.25E-2 l CO-60 1.97E-2 9.85E-2 3.46E-1 Fe-59 1.32E-3 9.58E-3 1.76E-2 j Zn-65 5.27E-4 3.63E-3 9.57E-3 l Mn-54 5.52E-3
2. 54 E-2 1.02E-1 l
Cr-51 1.26E-3
2. 74 E-2 4.30E-3 Zr-Nb-95 1.69E-3 2.65E-3 1.36E-2 tto-99 1.16E-4 1.34E-2 1.63E-3 Te-99m Ba-La-140 3.37E-3 8.50E-2 1.64E-2 Cc-141 3.46E-3 5.20E-4 3.29E-3 Cc-144 6.50E-4 1.10E-3 1.22E-2 Ag-110m 1.55E-5 Fe-55 4.14E-2 8.69E-2 4.51E-1 Np-239 8.00E-5 5.02E-3 Unidentified 1.40E-2

6. 74 E-2 5.50E-2 Total (C1) 1.34E-1 8.82E-1 1.10E+0 Total Volume of 1.26E+9 3.85E+9 5.30E+9 Dilution Water (litres) 91
i .1 i V. EFFLUENT RELEASE DATA ) i 1 A summary of Pilgrim Station radioactive effluents is presented in Tables V-A and V-B. Table V-A summarizes liquids released to Cape Cod Bay via the discharge canal. Table V-B summarizes the effluents released to cne atmosphere through the main stack and through the reactor building vent. Figures V-A-1 and V-A-2 show I liquid fission and activation product quarterly releases respectively; Figures V-B-1 and V-B-2 show gaseous fission and activation product quarterly releases. i I i l 1 1 1 92
4 17 16 5 6 9 34225313323354463311143 r + - + + e EE EE E E E EEEEEEEEEEEEEEEEEEEEEEE t 89 21 3 3 4 45494651109447393420832 r 30 24 a 9 4 6 12562393141610617474361 u 91 11 4 2 8 18485512362831638131951 Q ST NE 3 U 07 16 4 6 9 33213212313232342 12 L r + - + - + + 0 F e EE EE E E E EEEEEEEEEEEEEEEEE EEEEE t 04 90 0 0 0 4 3541566720634962 28538 F r 47 50 E a 2 5 3 04340247503366182 24446 u 12 13 l 2 5 11513131914131351 68123 C D I U Q I L 2 17 06 4 5 9 23211323322322433322133 r +- + + E e EE EE E E E EEEEEEEEEEEEEEEEEEEEEEE t 29 79 2 l 5 20428858344540020094209 V r 82 51 I a 6 O. 8 72527585657635241167873 T u 82 41 9 5 3 71611299322218591186815 Q A C A V O I 7 E D 7 L A 9 1 B R 1 17 39 5 4 9 4432232343334335452215 A r + + e EE EE E E E EEEEEEEEEEEEEEEEEEEEEE T F t 46 73 6 8 6 3135267272696760054045. r 30 56 O 4 2 2 1246709325261348551435 a u 11 43 1 2 1 Y Q 5351111155111333614111N R A M M U S ) a hp L l A a U N se N s ) A s ) l ) m s 9 a l m r 9 g m / ) e I / i i t m M u ) , i c C i e m C u ( l E u u ( ( i v 5t o S i ( y o 9 e0 b t) iid )d t t) r - n4 a i e i s e mh1 ( rCe t( s (Cs v er t ) uc-a i te a i ien d a e t st W C btu o ygde dl c ai ( om - i tnel ee a Wl n i9 i de a r iisR sR o o d 9 4 n9 ( vda a i d i e 80 51 - d m ep iue e. d il t s 9471 - 5 mmn134o i tll c l c a ua u a m 33380 e uua434l f r3 ccen en R qn l e um11156 smmnL111l io3 anRo Ro i a i l iu 95euie- - - - 5tf11 oi C C a LC D e timmett56nindmmemr5n i l l h R nt uunll - - a m ob u u n u e el dta a. p f e f o oiii a a n e g o c yiiii v n d a o o aotg tg l og o s rrssdbbonnrrl rrdrl oitnn RNov m ov A r e tteeoooriahioaeoeirnoee TA u TA ea e d SSCCICCIZMCZMBCICSI UTXX ( s i s mh m i s t s uc u l o i o l s l c r r r oi o u G T G VD V N ll
4 32 01 7 322 433 35543 466465666 r ++ +- e EE EE E EEE EEE EEEEE EEEEEEEEE t 07 17 4 465 069 65680 339749256 - 02804.DA0375478 r 36 76 1 207 603 au 56 34 l 111 211 32211N126371741N Q 3 43 10 7 222 221 35542556 4 r ++ ++ e EE EE E EEE EEE EEEEEEEE E S t 74 41 9 560 914 40253178 6 T r 86 03 8 498 944 86461627.DA7DDA A a N u 68 11 3 769 691 95522241N1NN2N21 E Q ULFF E 2 54 10 7 211 111 24542 6 4 S r ++ ++ e EE EE E EEE EEE EEEEE E E U t 2l 20 5 064 782 02102 4 0 O r 8. l. 0 17 658 015 00013 0 7 E a u 12 22 6 922 125 311E3 9 1 S Q AG EV I 1 54 10 6 211 211 35632 5 4 6 B T r ++ + + C e EE EE E EEE EEE EEEEE E E E t 72 47 6 387 4 41 62567 9 3 7 V A r 50 52 6 803 464 07105 5 6 0 O 7 a E I 7 u 12 23 2 512 725 99813 2 1 1 Q L D 9 B A 1 A R T F O YRA M M U S ) ) t c c n e e L s s s i) ) e 0 5 s V 4 9 e / / C e k 1 A s i i ( i c m U s C C r g a m u a u u y u d t u i N G )( )( t C k l S n b N i i i c B a o A n Ce Ce v l a n 90 h 4 i o (t (t i l t r i 8947t15 N i a a t a S 135 o 135 a 33 n5 - I t dR dR c ( 333 t 333 M mm11 a e8 0 m a e e a n 111 c 111 mu- - Lms5 6 u M v se se o d i - a s iimm ue 9 5i E i as as i e a eee e eee e tt uumint5t6 - mmn l t ea ea d s M nnn R nnn t nniiunal l - o S c l e l e a a - iii - iii a oossioganaeciihh A el el R e s ddd s ddd l rrllrrnbobnrcrtt Re Re l n ooo n ooo u tteeahaoroiieeuu d R R a e e III e III c SSCCBCMCICzZCCRR n l l h R g g i a a. a. p o o t tg tg l s l l r n ov m ov A e a a a o TA u TA p H H P i i s o s t s t s i o o i r r s F T G I @A ~
4 4654445 356 65 2212 322321122 r ++++ - + +++++ ++ e EEEEEEE EEE EE EEEE EEEEEEEEE t 8702532 767 78 8797 716634 621 r 9661935.DA 5 0 4. DA9. AAAA1196 065416482.AA a DDDD DD u 2592341N119N46 Q NNNN9161 365125827NN 3 3644345545656 2111 3344322332 r ++++ 0++ + + + + ++++ e EEEEEEEEEEEEE EEEE EEEEEEEEEEE t 8366848975843 9086 62210221715 9107184825308.A AAAA4019 3 2.l' r 69275787 a D DDDD u 2812212191835U NNNN5749 28612129134 Q 2 354434 4 5 223 34344323 24 r +++ ++++++++ ++ e EEEEEE E E EEE EEEEEEEE EE t 626l02 6 3 995 87822570 69 r 4 5 4.O.6 4 8 5 719 88611251 94 a u 515951 6 2 152 41936372 94 Q ) 1 T 354324 4 4 0113233 34444423 23 r +++++++ ++++++++ ++ N e EEEEEE E E EEEEEEE EEEEEEEE EE O t 646846 3 6 3909392 83208973 59 r C 868099 6 4 7210122 58363470 36 a ( u 313124 6 7 4311211 31135132 99 Q B V E L B t A n T t e n e V V g d g l k d B c ) l 0 5 a s L 4 9 r t e 1 o S i r m t r o m u c n u t u i a i C c n b e a a a o 36 R M l e 90 h4 i 00 d l R 89 t5 N 11 m m e a - - 47 n-1 5578 m 5578 m m mi ( mm33 ae8 0 m4 mm s 88883558 s 82883558173f uu11Ls5 6 u1 uu e - 3333 e 3333333i d s ii - - e9 - 5i ii s nnnn1111 s nnnt.1111111t e e ttmmmnt5t6 nmnn s oooo s oooo n s t nnuuual l - ouee a tttt nnnn a ttttnnnnnnne a a o oiii g a n a c cih h g ppppoooo g ppppoooooood e l rrssrnbobnrrtt yyyynnnn yyyynnnnnnni l u tteeaacroiieuu n rrrreeee n rrrreeeeeeen e c SSCCBMcICZZCRR o KKKKXXXX o KKKKXXXXXXXU R i i i t s s s r s s e a i i p P F F o t o s I g(n
I I l .^ 1X10-0 1X10-1 J .L $*b io) l . j .I 1X10 2 - i 2 6 in a O i ) 1 X10-3. 1 X10-4. l ~ l = l- $ Cs 137 @ Cs - 134 1X10 5 1 2 3 4 QUARTERS Figure V-A-1. Liquid Fission Product Release 1977 96 L
1 X10 0 _ / 1X10'1 _ 6 I 'I cc 1 0 l 0 _q h 9 1 X 10-2 ~ 4
)
1 l \\ (*- 1X10-3_ / @ Co ; 58 X co - 60 A Zn 65 $ Mn 54 1X10'4 1 2 .3 4 i QUARTERS i Figure V-A-2. Liquid Activation Product Release,.1977 a 97 ) a,
i 1X10 0 _ 1 131 X Sr. 89 6 Sr 90 Q Cs 134 A cs 137 G I 1 X10'l I 3 l 1X10-2 l .l i E 3 O / 1X10 3 N N 1 x10-4 2L A 1 1X10-5 1 2 3 4 l QUARTERS Figure V-B-1. Gaseous Fission Product Release,-1977 l l 98 L__________-.-----_
1 X10-2_ _M 1X10-3 2 s IX10 4 _ -e a U 1X105 _ 1X106 $ Co-60 A Mn - 54 1 X 10'7 1 2 3 4 QUARTERS Figure V-B-2. Gaseous Activation Product Release, 1977 99
I VI. REFERENCES 1. Memorandum, Yankee Atomic Electric Company, REG 65/75, M.S. Strum. 2. 10 CFR 20, Title 10 of the Code of Federal Regulations, Part 20, Standard for Protection Against Radiation. 3. Supplement to Environmental Radiation Monitoring Report No. 9, Boston Edison Comapny, July 31, 1977. 4. Memorandum, Yankee Atomic Electric Company, REG 94/77, A.E. Desrosiers. 5. Direct Radiation Survey, June 1976, S.A. Farber, Yankee Atomic Electric Company. 6. Memorandum, Yankee Atomic Electric Company, REG 211/76, A.E. Desrosiers. 100
y. g I BOSTON EoisON COMPANY GENERAL DrriCEs 800 BovLaTON STREET B D S TO N. M ASS ACNUSETTe D 2199 i i j Q. CARL ANODONINI { MANAGER NUCLEAR OPER ATIONE DEPARTMENT March 29, 1978 i BECo. Ltr. #78-55 Mr. Boyce H. Grier, Director Office of Inspection and Enforcement Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pa. 19406 License No. DPR-35 Docket No. 50-293 l Environmental Radiological Monitoring Report No. 10 January 1 - December 31, 1977
Dear Sir:
In accordance with the Pilgrim Nuclear Power Station Technical Specification 6.9.C.2, Boston Edison Company hereby submits Environmental Radiological Monitoring Report No. 10. This report applies to the period from January 1, 1977 through December 31, 1977. Very truly yours, raw Attachments: (2 copies) cc: Director Office of Nuclear Reactor Regulation Division of Operating Reactors U.S. Nuclear Regulatory Commission Wachington, D. C. 20555 (17 copies) 1 I l. i 1 l b ]}}

ML20238A374

Contents

Text

SUMMARY

Background

SUMMARY

SUMMARY

= = = - - = - - = - = - = - - = - = - - - - = = = = =. - - = - - - - - - = -

- = = = = - = = = = = - = = = = * - = = - = - - - = - = - = - = = = = = - = -

- - - - = - - = = - - = - - - - = = - = - - = - = - = - - = = - = = = - = = -

- - = = = = = - - = = = = = - - = = - = - = = - - = * = = - = = - - - - -

- - = = = - = - = = = = = - * = - = - = = - = = = - = - = = - = - = = = =

Dear Sir:

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ML20238A374

Text

SUMMARY

Background

SUMMARY

SUMMARY

= = = - - = - - = - = - = - - = - = - - - - = = = = =. - - = - - - - - - = -

- = = = = - = = = = = - = = = = * - = = - = - - - = - = - = - = = = = = - = -

- - - - = - - = = - - = - - - - = = - = - - = - = - = - - = = - = = = - = = -

- - = = = = = - - = = = = = - - = = - = - = = - - = * = = - = = - - - - -

- - = = = - = - = = = = = - * = - = - = = - = = = - = - = = - = - = = = =

Dear Sir:

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