Text

Annual Radiological Environ Operating Rept for Jan - Dec 1996
	ML20138H276
Person / Time
Site:	Seabrook
Issue date:	12/31/1996
From:	; NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO), YANKEE ATOMIC ELECTRIC CO.
To:	;
Shared Package
ML20138H269	List: ML20138H267; ML20138H276;
References
	NUDOCS 9705070132
	Download: ML20138H276 (200)
	v • d • e

l T j SEABROOK STATION ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT l l For the Period l

l January - December 1996 April 1996 l l

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j Prepared By:

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North Atlantic Energy Service Corporation l Environmental Sciences Seabrook Station and Yankee Atomic Electric Company Environmental Engineering Department Bolton, Massachusetts 01740 l

I 9705070132 970429 PDR ADOCK 05000443 R PDR l- .__

l TABLE OF CONTENTS Section Page EXECUTIVE

SUMMARY

11 LIST OF TABLES iii LIST OF FIGURES iv

1.0 INTRODUCTION

............................................ 1 2.0 ENVIRONMENTAL MONITORING PROGRAM........................ 2 i l

3.O

SUMMARY

OF PADIOLOGICAL ENVIRONMENTAL DATA.............. 13 l

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A. Air Particulate...................................... 14 l j B. Charcoal Filter...................................... 22 l l C. M11k................................................. 24 l

! D. Surface Water........................................ 31 I E. Ground Water............... ....................... 34 ,

F. Sediment................. ...................... 39 l G. Fish.................... ........................ 42 H. Lobsters................. .......................... 45 I. She11 fish............................................ 48 J. Irish Moss........................................... 51 K. Food crops........................................... 54 K. Direct Radiation..................................... 57 l

4.0 QUALITY ASSURANCE PROGRAM............................... 78 l 5.0 LAN D U S E C EN S U S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 6.0 REFCRENCES.............................................. 91 l

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4 Executive Summary The Radiological Environmental Monitoring Program for Seabrook Station operated without interruption for the period of January through December 1996. During the year, samples collected as part of the radiological environmental program included air particulates, charcoal filters, milk, ground water, surface (sea) water, sediment, fish, lobsters, shellfish, vegetation and direct radiation. Radiological analysis on all samples included that for gamma and/or beta radiation. Any variability observed in the data is based primarily on a number of natural variables that can influence background radiation. The radionuclides identified as naturally occurring are K-40, Be-7, Th-232 and its daughter products. Cesium-137 was detected in milk as the result of fallout from atmospheric nuclear weapons testing. The levels detected are consistent with those measured during the preoperational phase of the monitoring program.

During 1996, Seabrook Station had a capacity factor of 96.8%. During 1996, the maximum whole body dose to the hypothetically exposed individual was 0.00568 millirem. This whole body dose is the sum of all the exposure pathways for liquid and gaseous effluents, plus the direct whole body dose 1 from station operations. This total dose represents approximaterly 0.02% i of the whole body dose limit for a member of the public as set forth in 40CFR190. The complete calculational methodology is submitted to the NRC as part of the Annual Radioactive Effluent Release Report.

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I LIST OF TABLES Number Title Page i

l 2.1 Radiological Environmental Monitoring Program 3 2.2 Radiological Environmental Monitoring Locations 4 3.1 Environmental TLD Measurements................ 58 4.1 Summary of Process Control Analysis Results... 81 4.2 Summary of EPA Intercomparison Analysis Results 82 4.3 Summary of YAEL/Analytics Cross-Check Results... 84 4.4 Summary of Blind Duplicate Samples Submitted.. 87 4.5 Summary of Blind Duplicate Results............ 88 5.1 Land Use Census Result ....................... 90 1

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LIST OF FIGURES Number Title Page 2.1 Radiological Environmental Monitoring Locations Within 4 Kilometers of Seabrook Station............... 7 2.2 Radiological Environmental Monitoring Locations Between 4 Kilometers and 12 Kilometers from i Seabrook Station...................................... 8 2.3 Radiological Environmental Monitoring Loc.utions outside 12 Kilometers of Seabrook Station............. 9 ;

2.4 Direct Radiation Monitoring Locations Within 4 l l

Kilometers of Seabrook Station........................ 10 l 2.5 Direct Radiation Monitoring Locations between 4 Kilometers and 12 Kilometers from Seabrook Station.. 11 I

i 2.6 Direct Radiation Monitoring Locations Outside l 12 Kilometers of Seabrook Station ..................... 12 3.1 Gross Beta Measurements of Air Particulate Filters..... 15 1

3.1.1 Gross Beta Quarterly Averages 1985-96 (AP 01,02,03,06) 16 3.1.2 Gross Beta Quarterly Averages 1985-96 (AP 04,05,06).... 17 3.1.3 Gross Beta Quarterly Averages 1985-96 (AP 07,08,06).... 18 3.2 Gross Bets Quarterly Average Air Particulate Filters... 19 1992-1996 Indicarcis vs. Control 3.3 Cesium-137 in Milk (Stations TM-04, 09, 15)............ 22 i l

3.3.1 Cesium-137 Annual Average Concentrations 1985-1996 l (TM-04, 09, 15)....................................... 26 1

3.4 Cesium-137 in Milk (Stations TM-16, 20, 21)............ 27 1 3.4.1 Cesium-137 Annual Average Concentrations 1985-1996 L (TM-16, 20, 21)........................................ 28 3.5 Gross Beta Measurements of Ground Water................ 35 3.5.1 Gross Beta Measurements of Ground Water Semi-Annual Averages 1985-1996..................................... 36 3.6 Environmental Radiation Measurements, TL 01-05......... 60 3.6.1 Environmental Radiation Measurements, 1985-1996 TL-01, 02, 03, 04, 05 ................................ 61 l

f 3.7 Environmental Radiation Measurements, TL 06-10......... 62 3.7.1 Environmental Radiation Measurements, 1985-1996 TL-06, 07, 08, 09, 10 ................................ 63 3.8 Environmental Radiation Measurements, TL 11-15......... 64 3.8.1 Environmental Radiation Measurements, 1985-1996

, TL-11, 12, 13, 14, 15................. ............... 65 i

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i 3.9 Environmental Radiation Measurementa, TL 16-20......... 66 l

3.9.1 Environmental Radiation Measurements, 1985-1996 T1-16, 17, 18, 19, 20................................. 67 3.10 Environmental Radiation Measurements, TL 21-25......... 68 i 3.10.1 Environmental Radiation Measurements, 1985-1996 ;

TL-21, 22, 23, 24, 25 ................................. 69

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3.11 Environmental Radiation Measurements, TL 26-30......... 70 3.11.1 Environmental Radiation Measurements, 1985-1996 TL-26, 27, 28, 29, 30 ................................. 71 3.12 Environmental Radiation Measurements, TL 31-35.....,... 72 3.12.1 Environmental Radiation Measurements, 1985-1996 TL-31, 32, 33, 34, 35 ................................. 73 i

3.13 Environmental Radiation Measurements, TL 36-40......... 74 l 4

3.13.1 Environmental Radiation Measurements, 1985-1996 TL-36, 37, 38, 39, .................................... 75 3.14 Environmental Radiation Measurements, TL 41-47......... 76 )

3.14.1 Environmental Radiation Measurements, 1985-1996 I

, TL-41, 42, 43, 44, 45, 46, 47 ......................... 77 l l

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b ANNUAL RADIOLOGICAL ENVIRONMENTAL i OPERATING REPORT l

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1.0 Introduction i

The North Atlantic Energy Service Corporation's (NAESCO) Radiological l Environmental Monitoring Program at Seabrook Station has been designed l and carried out to achieve the following specific objectives. ,

I To provide an indication of the appearance or accumulation of any ;

radioactive material in the environment caused by the operation of the nuclear power station.

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

To verify the adequacy and proper functioning of station effluent controls and monitoring systens. l

To provide standby monitoring capability for rapid assessment of

, risk to the general public in the event of unanticipated or l accidental releases of radioactive material.

North Atlantic Energy Service Corporation collected the terrestrial samples. Normandeau Associates, Inc. collected the marine and sediment samples. After initial processing, the samples were sent to the Yankee Atomic Environmental Laboratory (YAEL) in Westboro, Massachusetts for further processing and radionuclide analysis. The YAEL also processed the environmental thermoluminescent dosimeters (TLDs).

This report is a summary of the findings of the Radiological Environmental Monitoring ?rogram for 1996. It is being provided in compliance with plant Technical Specification 6.8.1.3.

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l 2.0 Environmsntal Monitoring Program In this section, Table 2.1 outlines th>e monitoring program as required by Plant Technical Specification 3/4. 2.1. Table 2.2 lists the operational sampling stations and their specific locations (distances are measured from the center of the Unit 1 Containment Building). The sampling locations are shown on maps in Figures 2.1 through 2.6 Below are listed the two-letter media codes and what they represent:

AP Air Particulate ,

CF Charcoal Filter '

TM Milk l WG Ground Water WS Surface (Sea) Water SE Sediment PH Fin fish l HA Lobsters l MU Mussels (Shellfish) 1 l TL Direct Radiation (TLD) l l

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$ 4 Table 2.1 Radiological Environmental Monitoring Program Media Sampling Frequency Required Analyses Air Particulate (AP) -Weekly Gross Beta ]

-Quarterly Composite Gamma spectroscopy 1 i

Charcoal Filter (CF) -Weekly I-131 )

Milk (TM) -Monthly; bimonthly Gamma spectroscopy when animals I-131 are on pasture Surface (Sea) Water (WS) -Monthly Gamma spectroscopy

-Quarterly Composite H-3(composite)

Sediment (SE) -Semiannually Gamma spectroscopy Fish & Invertebrates -Seasonal or Gamma spectroscopy (FH, HA, MU) -Semiannually Direct Radiation (TL) -Quarterly Integrated gamma exposure 3

_ _ _ _ - - -......_ .__ _ _. _ . _ .. _ __. - . _ _ _ .. _ . _ __. _ _ _ _. _ _ __. _ ._. - - _ _ _ . _ - _~

Table 2.2 Radiological Environmental Monitoring Locations 1996 Distance From Direction Station Code Station Plant From (Media - Sta. No.) Description Zone * (km) Plant _

i AP/CF-Ol+ PSNH Barge Landing Area 1 2.7 ESE l AP/CF-02+ Hampton Marina 1 2.7 E l AP/CF-03+ Southwest Boundary 1 0.8 SW l AP/CF-04+ West Boundary 1 1.0 W AP/CF-05 Winnacunnet High School 1 4.0 NNE AP/CF-06+ Georgetown Substation 2 24.0 SSW AP/CF-07 PSNH Substation 1 5.7 NNW i AP/CF-08 E&H Substation 1 3.4 SSE i

TM-04+ Salisbury, MA 1 5.2 SW TM-09+ Hampton, NH 1 5.3 NNW

! TM-10+ Hampton Fr.lls, NH 1 4.8 WNW l TM-15+ Hampton Falls, NH 1 7.0 NW l TM-16 Kensington, NH 1 7.7 WNW

TM-20+ Rowley, MA 2 16.3 S l TM-21 North Andover, MA 2 29.0 SW l

WG-01 Seabrook Town Wells 1 5.6 W WG-04 Seabrook Station Well No.4 1 1.0 N l WG-13 Seabrook Station Well No.13 1 1.0 N l WS-01+ Hampton-Discharge Area 1 5.3 E WS-51+ Ipswich Bay 2 16.9 SSE SE-02 Hampton-Discharge Area 1 5.3 E SE-07+ Hampton Beach 1 3.1 E SE-08 Seabrook Beach 1 3.2 ESE SE-52 Ipswich Bay 1 16.9 SSE l SE-57 Plum Island Beach 2 15.9 SSE l

FH-03+ Hampton-Discharge Area 1 4.5 ESE i FH-53+ Ipswich Bay 2 16.4 SSE )

l HA-04+ Hampton-Discharge Area 1 5.5 E l HA-54+ Ipswich 2 17.2 SSE MU-06+ Hampton-Discharge Area 1 5.2 E

! MU-09 Hampton Harbor 1 2.6 E MU-56+ Ipswich Bay 2 17.4 SSE MU-59 Plum Island 2 15.8 SSE ;

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Table 2.2 (Cont'd) )

J Radiological Environmental Monitoring Locations ,

1996 ,

2 Distance '

From Direction l Station Code Station Plant From '

(Media - Sta. No.) Description Zone * (km) Plant '

l TL-1+ Brimmer's Lane, I 1.1 N I Hampton Falls TL-2+ Landing Road, Hampton I 3.2 NNE I TL-3+ Glade Path, Hampton Beach I 3.1 NE TL-4+ Island Path, Hampton Beach I 2.4 ENE TL-5+ Harbor Road, Hampton Beach I 2.7 E TL-6+ PSNH Barge Landing Area I 2.7 ESE TL-7+ Cross Road, Seabrook Beach I 2.6 SE

TL-8+ Farm Lane, Seabrook I 1.1 SSE TL-9+ Farm Lane, Seabrook I 1.1 S !

l TL-10+ Site Boundary Fence I 1.0 SSW l TL-11+ Site Boundary Fence I 1.0 SW ,

TL-12+ Site Boundary Fence I 1.0 WSW l TL-13+ Inside Site Boundary I 0.8 W TL-14+ Trailer Park, Seabrook I 1.1 WNW s' TL-15+ Brimmer's Lane, I 1.4 NW ,

Hampton Falls l TL-16+ Brimmer's Lane I 1.1 NNW Hampton Falls TL-17+ South Road, North Hampton 0 7.9 N TL-18+ Mill Road, North Hampton 0 7.6 NNE ,

TL-19+ Appledore Avenue, 0 7.9 NE ,

North Hampton 3 i TL-20+ Ashworth Avenue, 0 3.4 ENE

! Hampton Beach l TL-21+ Route 1A, Seabrook Beach 0 3.7 SE

! TL-22+ Cable Avenue, Salisbury 0 7.6 SSE i i Beach l

, TL-23+ Ferry Road, Salisbury 0 8.1 S TL-24+

Ferry Lots Lane, 0 7.2 SSW Salisbury

TL-25+ Elm Street, Amesbury 0 7.6 SW 1 TL-26+ Route 107A, Amesbury 0 8.1 WSW l TL-27 Highland St. S. Hampton 0 7.6 W !

TL-28 Rte. 150, Kensington 0 7.9 WNW j TL-29 Frying Pan Ln., Hampton Falls 0 7.4 NW ,

TL-30 Route 150, Hampton 0 7.9 NNW j l

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Table 2.2 (Cont'd) !

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} Radiological Environmental Monitoring Locations

, 1996 1

) Distance ,

From Direction i I Station Code Station Plant From (Media - Sta. No.) Description Zone * (km) Plant i TL-31+ Alumni Drive, Hampton S 4.0 NNE l l TL-32+ Seabrook Elementary School S 1.9 S i j TL-33+ Dock Area, Newburyport S 9.7 S TL-34+ Bow Street, Exeter S 12.1 NW

! TL-35+ Lincoln Ackerman School S 2.4 NNW 4

TL-36+ Route 97, Georgetown 2 22.0 SSW j TL-37+ Plaistow, NH 2 26.0 WSW j TL-38+ Hampstead, NH 2 29.0 W i TL-39+ Fremont, NH 2 27.0 NW I

! TL-40+ Newmarket, NH 2 24.0 NNW i

! TL-41+ Portsmouth, NH 2 21.0 NNE j TL-42+ Ipswich, MA 2 27.0 SSE ;

i TL-43 Education Center S 0.3 ENE TL-44 Rocks Road Landing S 0.5 SW '

TL-45 Hampton Fire Station S 4.5 NE i TL-46 Seabrook Beach S 2.9 ESE

TL-47 Hampton Falls, NH S 4.2 WNW I i i

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ol = Indicator Stations; 2 = Control Stations; O = Outer Ring TLD;

! I = Inner Ring TLD; ,

l S = Special Interest TLD

+ = Sample Locations Required by the Off-Site Dose Calculation Manual (ODCM) l l

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! FIGURE 2.1 Radiological Environmental Monitoring Locations Within 4 Kilcmeters of Seabrook Station i !

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) Kilometers and 12 Kilometers from Seabrook Station

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Kilometers of Seabrook Station

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Seabrook Station

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FIGURE 2.6 Direct Radiation Monitoring Locations Outside 12 Kilometers of Seabrook Station

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3.0 Summary of Radiological Environmental Data The following pages summarize the analytical results of the environmental samples which were collected in 1996. Each environmental media category is presented as a separate subsection. A discussion of the sampling requirements and results for each program is followed by a table which summarizes the data. Listed at the top of each table are the units of measurement for each medium. The left hand column contains the radionuclide which is being reported, total number of analyses of that radionuclide, and the number of measurements which exceed ten times the yearly average of control measurements. The latter are classified as "non- routine" measurements. The next column lists the Lower Limit of Detection (LLD) for those radionuclides which have detection capability requirements specified in the off-Site Dose Calculation Manual.

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! Those sampling stations which are adjacent to the plant and which could I conceivably be affected by the operation of Seabrook Station are called

! " Indicator" or " Zone 1" stations. Distant stations, which are beyond l plant influences are called " Control" or " Zone 2" stations. Direct l radiation (TLD) monitoring locations are subdivided into site boundary, l inner ring, and outer ring (emergency response) stations.

A set of statistical parameters is calculated for each radionuclide.

i This set of statistical parameters includes separate analyses for (1) the indicator stations, (2) the station having the highest annual mean concentration for that radionuclide, (3)and centrol stations. For each of these three groups of data, these parameters are as follows:

The mean value of all concentrations.

The range of values.

The nunber of positive measurements (a concentration which is greater than the a posteriori LLD for that analysis) divided by the total number of measurements.

Each single radioactivity measurement datum in this report is based on a single measurement and is reported as a concentration plus or minus a one standard deviation uncertainty. The quoted uncertainty term l represents only the random uncertainty associated with the radioactive decay process (counting statistics), and not the propagation of all possible uncertainties in the analytical procedure.

Attachment I contains the data for the samples collected in 1996. The results are organized by sample type, within each sample type listing the data is alphabetical by nuclide, within each nuclide listing the data is chronologically arranged by end date (date of sample ,

collection). ,

The radionuclide value concentrations (charcoal media) have been corrected for radioactive decay to the end of the collection. The airborne radiciodine (charcoal) concentrations have been calculated assuming a constant flow rate and concentration throughout the collection period and correcting for decay while sampling as well as between sample collection termination and analysis.

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! Pursuant to ODCM requirements, any concentration below the LLD for its

! analysis is reported as "not detected". These values are set to zero for

! averaging purposes. Where a range of values is reported in the tables of

! this section, values less than the a posteriori LLD for the analysis are reported as zero.

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A) Air Particulate i

Air monitoring stations were established at a total of eight locations (five are required by the Offsite Dose Calculation manual). Seven of these locations are indicators, while the remaining one is a control station.

Airborne particulates are collected by passing the air through a glass-fiber filter. These filters are collected weekly and held for at least 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> before being analyzed for gross-beta activity (indicated as GR-B in tables) to allow for the decay of radon daughter products. Quarterly composite air filters from each location are analyzed for gamma emitting radionuclides. In 1996, naturally occurring Be-7 was the only nuclide detected. All gross beta samples were collected as required.

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FIGURE 3.1 GROSS-BETA MEASUREMENTS OF AIR PARTICULATE FILTERS SEABROOK STATION 0.08 0.08 O.07- - 0.07 0.06- -0.06 u -

3 0.05- -0.05 8 -

y 0.04 - - 0.04 R -

4 j 0.03- , . 9 -0.03 0.02s ,

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, , , 0 4 January April July October January 1996 c AP-01 Barge Landing Area

--o- AP-02 IIarrpton Marina e AP-03 SW Boundary e AP-04 W Boundary

--t- AP-05 Winnacunnet High School v AP-06 Georgetown Substation (Control)

- t,- AP-07 PSNH Substation, Hampton v AP-08 Exeter & Hampton Electric Co.

)

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l FIGURE 3.1.1 GROSS-BETA MEASUREMENTS OF AIR PARTICUIATE FILTERS QUARTERLY AVERAGES SEABROOK STATION 1

0.16 0.16 0.14 2 Chernobyl -0.14

May, 1986 0.12 2 -0.12

h 5% Criticality

@ 0.l l Ane, 1989 _o,i t :

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, . 0 1984 1986 1988 1990 1992 1994 1996 1998

-ty- AP-01 Barge Landing Area

+ AP-02 Hampton Marina

--g - AP-03 SW Boundary v AP-06 Georgetown Substation (Control) 16.

FIGURE 3.1.2 GROSS-BETA MFASUREMENTS OF AIR PARTICULATE FILTERS QUARTERLY AVERAGES SEABROOK STATION 0.16 0.16

~ - 0.14 Chernobyl

_ May, 1986 0.12- - 0.12

fi 5% Criticality y 0.1- , ,

June, 1989 _ o ,1

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) : May, 1990 Q 0. 0 6 -- -0.06 0.04 - 0.04 0.02 8 -O.02 3g 0 ,

, , 0 1984 1986 1988 1990 1992 1994 1996 1998 AP-04 W Boundary

+ AP-05 Winnacunnet High School x AP-06 Georgetown Substation (Control) 17.

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FIGURE 3.1.3 !

GROSS-BETA MEASUREMENTS OF AIR PARTICULATE FILTERS ,

QUARTERLY AVERAGES l

SEABROOK STATION 4 .

0.16 0.16 0.14- Chernobyl _o,14

May, 1986 .

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5% Criticality :

$ 0.1 June, 1989 -0.1 o -

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May, 1990

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I m- AP-07 PSNH Substation, Hampton

--o- AP-08 Exeter & Hampton Electric Co.

t AP-06 Georgetown Substation (Control)

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FIG'URE 3.2 GROSS-BETA ON AIR PARTICULATE FILTERS QUARTERLY AVERAGES SEABROOK STATION 0.08 0.08 0.06- -0.06

$ ~

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y 0.04- - 0.04 l R

y .

a 0.021 - 0.02 x n as 0 , , , . . . , . , , , , , . . 0 1/1/92 1/1/93 1/1/94 1/1/95 1/1/96 1/1/97

--e- Indicators x Control

}

19.

- ._ _m. . . . . _ . _ . _ _ _ _ _ . . _ . - _ . . _ _.. _ _ _ _ _- _ _ _ _ _ _ . _. _ _ __

J 9

Radiological Environn atal Program Summary 9

)

Seabrook Nuclear Powur Station. Seabrook. NH (January - December 1000)

MEDIUM: Air Particulates (AP) UNITS: pCilcubic meter Indicator Stations Station With Highest Mean Control Stations Radionuclideo Mean Sta. Mean Mean (No. Analyses) Required Range Range Range (Non-Routine *) LLD (No. Detected") (No. Detected") (No. Detected **)

i 4

. l GR-8 (424) 0.01 1.e5 -2 06 1.9E -2 1.9E -2

, (0) ( 6.3 - 41.4)E -3 ( 7.5 - 41.4)E -3 ( 8.2 - 35.4)E -3 a,

(N4/ 371) (53/ 53) (53/ 53)

Be.7 (32) 9.5E -2 02 1.0E -1 1.0E -1 1

(0) ( 5.7 - 12.3)E -2 ( 8.4 - 12.3)E -2 ( e 4 - 12.1)E -2 1

4 (28/ 2e) (4/ 4) (4/ 1) i K-40 (32) 4.75 -4 06 2.1E -3 4.35 -4 l 1

(0) ( -6. 9 - 9. 6) E -3 ( -5.1 - 9. 6) E -3 ( -3.2 - 3.8)E -3 f (0/ 28) (0/ 4) (0/ 4) I Cr-61 (32) -3.78 -4 06 3.5E -3 3.5E -3 l (0) ( -9.1 - 10.1) E -3 ( -6.1 - 15.7) E -3 ( -6.1 - 15.7)E -3 l (0/ 28) (0/ 4) (0/ 4)

Mn44 (32) -1.3E -5 04 2.6E -4 1.es -5 (0) ( -4.9 - 6.2)E -4 ( -1. 4 - 61. 5) E -5 ( -e .1 - 2 6. 4) E -5 (0/ 28) (0/ 4) (0/ 4)

Co4s7 (32) 0.05 0 07 1.0E -4 -5.0E -5 (0) ( '-2. s - 2. 7) E -4 ( 0. 0 - 0.0) E O ( -1.6 - 1.0)E -4 (0/ 28) (0/ 4) (0/ 4)

Co48 (32) -3.1E -5 08 1.6E -4 -1.5E -4 (0) ( -7. 0 - 7. 6) E -4 ( -5. s - 7. 6) E -4 ( -5.4 - 2.0)E -4 (0/ 28) (0/ 4) (0/ 4)

Fe40 (32) -2.2E -4 Og 9.2E -4 -3.2E -4 (0) ( -3. 9 - 4.2) E -3 ( -1. 6 - 4.2) E -3 ( -1.4 - 1.3)E -3 (0/ 28) (0/ 4) (0/ 4)

Co40 (32) -2.8E -5 03 e.65 -5 -e.2E -5 (0) ( -7.1 - 5. 0) E -4 ( -2.1 - 5. 0) E -4 ( -3.0 - 2.0)E -4 (0/ 28) (0/ 4) (0/ 4)

Zn46 (32) -3.0E -4 03 -1.pt -4 -5.1x -4 (0) ( -1. 5 - 0. 7) E -3 ( -3. 7 - 0.0) E -4 ( -1. 5 - 0. 7) E -3 (0/ 28) (0/ 4) (0/ 4)

Se-76 (32) -3.95 -5 06 1.05 -4 1.7E -5 (0) ( -5.7 - 7.9) E -4 ( -3.3 - 4.5) E -4 ( -3.s - 3.2) E -4 (n/ 28) (0/ 4) (0/ 4)

Zr46 (32) 7.2E -5 02 s.4E -4 -1.1x -4 (0) ( -1. 6 - 1. 6) E -3 ( 4.1 - 16.4)E -4 ( -1. 6 - 0. 7) E -3 g (0/ 28) (0/ 4) (0/ 4)

Ru.103 (32) -1.8E -4 06 3.9E -4 3.9E -4 (0) , ( -1. 7 - 0. e) E -3 ( -3. 3 - 9.1) E -4 ( -3.3 - 9.1)E -4 (0/ 28) (0/ 4) (0/ 4)

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l l Radiological Environmental Program Summary 1

i Seabrook Nuclear Power Station. Saabrook. NH l (January December 1006)

MEDIUM: AirParticulates (AP) UNITS: pCilcutt rneter i

t Indicator Stations Stution With Highest Mean Control Stations Radionuchdes Mean Sta. Mean Mean l (No. Analyses) Rep 1 Range Range Range (Non-Routine *) Lt.D (No. Detected **) (No. Detected **) (No. Detected **)

i 0.0E o i Ru-106 (32) 01 1.3E -3 -4.9E ~4 l (0) ( -5.5 - 5.s)E -3 ( -1.5 - 4.5)E -3 ( -3. 0 - 1.0) E -3 (0/ 2s) (0/ 4) (0/ 4) l Ag-110M (32) -1.1x -4 06 1.7E -4 -3.1E -5 l (0) ( -9. 6 - 4.0) E -4 ( 4.7 - 23.5)E -5 ( -1.4 - 0.3)E -4 f

(0/ 2s) (0/ 4) (0/ 4) :

(

l Sb-124 (32) -3.1E -5 01 9.4E -4 1.4E -4 '

(0) ( -3.2 - 2.0)E -3 ( 3.3 - 20.5)E -4 ( -5.7 - 15.7) E -4 (0/ 28) (0/ 4) (0/ 4) ?

1131 (32) 2.4E -3 04 1.12 -2 -e.1x -3 (0) ( -2.0 - 2.1)E -2 ( -1.1 - 18. 5) E -3 ( -3.2 - 0.7) E -2 (0/ 2s) (0/ 4) (0/ 4)

Cs-134 (32) 0.05 0.05 0 07 1.5E -4 1.9E -5 (0) ( -4. 6 - 5.5) E -4 ( -3.7 - 32.7)E -5 ( -1. s - 2. 2) E -4 (0/ 28) (0/ 4) (0/ 4)

Cs-137 (32) 0.06 -3.4E -5 08 1.1E -4 2.1E -5 ?

(0) ( -5.7 - 4. 6) E -4 ( -5. 7 - 4. 5) E -4 ( -4.7 - 13.e)E -5 (0/ 28) (0/ 4) (0/ 4)

Ba-140 (32) -3.6E -4 06 4.1E -3 4.1E -3 (0) ( -7.0 - 9. 6) E -3 ( -6.1 - 11. 6) E -3 ( -6.1 - 11. 6) E -3 (0/ 28) (0/ 4) (0/ 4)

Co-141 (32) 3.1E -4 02 3.7E -4 -0. 6E -5 (0) ( -e .0 - 12.5) E -4 ( -2.2 - 12. 5) E -4 ( -1.0 - 1.0)E -3 (0/ 28) (0/ 4) (0/ 4) l Co.144 (32) -1.6F. -4 06 1.0E -3 1.0E -3 4 (0) ( -1 2 - 1.3) E -3 ( 1.3 - 21.1)E -4 ( 1.3 - 21.1) E -4 LO/ 28) (0/ 4) (0/ 4)

Th-232 (32) -1.61 -4 04 4.7E -4 -3.8E -4 (0) { *2.2 - 1.5)E -3 ( -4.8 - 145.2)E -5 ( -1.1 - 0. 4 ) E -3 (0/ 2e) (0/ 4) (0/ 4)

Non-Routine refers to those radenuchdes that exceeded the Reporting Levels in ODCM Table A.5-3.

1

- The fracten of sarnpie analyses yle6 ding detectab6e rnessurements (i.e. >3 standard deviehons) is shown in parentheses. I i

i B) Charcoal Filters Charcoal filter cartridges are in series with the air particulate glass-fiber filters. Monitoring stations were established at a total of eight locations (five are required by the ODCM). Seven of these are indicators and one is a control. Charcoal filters from the air sampling stations were collected and analyzed weekly for I-131 activity.

I During 1996, no I-131 was detected on charcoal filters. j i

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. . i Radiological Environmental Program Summary Seatwook Nuclear Power Station. Seabrook. NH (January . December 19H)

MEDIUM: CharcoalCartridge (CF) UMTS: pCucubic meter indicator Statens Staten With Highest Mean l ....... . . . . . . .

Control Stations Redenuclides Mean Sta. Mean Mean (No. Analyses) Required Range Range Range (Non-Routine *) LLD (No. Detected **) (No. Detected **) (No. D#.ected")

l 1131 (424) 0.07 3.3E -4 04 1.3E -3 7.9E -4 l (c) ( -2.0 - 2. 6) E -2 ( -2.8 - 1.5)E -2 ( -2.6 - 2.2)E -2 (0/ 371) (0/ 53) (0/ 53)

Non-Routine refers to those radionucikles that exceeded the Reporting Levels in ODCM Table A.5-3.

- The fraction of sample analyses yiekhng detectable rneasurements (i.e. >3 standard deviations) is shown in parentheses i

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?

i 8 C) Milk l Milk samples were collected every two weeks during the pasture season and monthly at other times. Samples are analyzed for I-131 and l gamma-emitting radionuclides.

Detectable concentrations of Cs-137 was measured in several samples collected in 1996. Nine positive results for Cs-137 were detected at required locations TM-04 (4), TM-09(1), and TM-16(4). Additional control

location TM-21 also had a positive Cs-137 result. It has been shown in the preoperational program that this nuclide is the result of l atmospheric nuclear weapons testing that persists in the environment.

l The levels of Cs-137 detected in 1996 are consistent with that detected in the pre-operational phase.

Potassium-40 is a naturally occurring nuclide detectnd in the milk samples.

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24

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l FIGURE 3.3 CESIUM-137 IN MILK SEABROOK STATION l 30 30

~

25 -25 202 -20

& 15 -15

.x N -

.s -

S 10 -10 5-

/

b [ A

-5 0 -- -0

-5 ,

, , . -5 Jan Apr Jul Oct Jan 1996

-g- TM-04 Dairy Farm, Salisbury, MA l l

--o- TM-09 Dairy Farm, Hampton, NH A TM-15 Goat Herd, Hampton Falls, NH j --g- TM-04 Positive Concentration !

1

-,- TM-09 Positive Concentration o

l 25.

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1

l FIGURE 3.3.1 CESIUM-137 IN MILK l 1

ANNUAL AVERAGE CONCENTRATIONS 1

50 50 0- -40 Chernobyl May, 1986 -

l

5% Criticality :

, 30- June, 1989 -30 x -

N -

d" : Full Power -

! 20- May, 1990 -20 l

l -

1 .

. S D

h_ - _ ,,

I YT $- .

0 ,

, 0 1984 1986 1988 1990 1992 1994 1996 l

--e- TM-04 Dairy Farm, Salisbury, MA l

-o- TM-09 Dairy Farm, Hampton, NH l 4 TM-15 Goat Herd, Hampton Falls, NH 1

4 l 26.

t

1

. a l

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FIGURE 3.4 l CESIUM 137 IN MILK l SEABROOK STATION l

30 I 30 1

~

l 25 -25 205 -20 g 15i -15 s .

.a -

o

a 10' -10 l

l

E 5- .

-5 a

~

0 \ -0

-5 ~ . ,

i . .

, . . -5 Jan Apr Jul Oct Jan l

1996 g TM-16 Goat Herd, Kensington, NH

-o- TM-20 Dairy Farm, Rowley, MA (Control) e TM-21 Dairy Farm, N. Andover, MA (Control)

-g- TM-16 Positive Concentration l

- - , - TM-21 Positive Concentration l

l 27.

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FIGURE 3.4.1 l

CESIUM-137 IN MILK ANNUAL AVERAGE CONCENTRATIONS 50 50 40 -40 T Chernobyl

May, 1986

_ 5% Criticality 3 30- June, 1989 -30 t :

d" : Full Power

! 20- May, 1990 -20 10- -10 U "

0 O O i I i

i '

l '

I O I I

1984 1986 1988 1990 1992 1994 1996

--t3- TM-16 Goat Herd, Kensington, NH

-o-- TM-20 Dairy Farm, Rowley, MA (Control)

A TM-21 Dairy Farm, N. Andover, MA (Control)

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..--. _ _ . . . - . .~- .-,. .a w.- n- . . - ~ . <a m.a_ .s a 4,u-. --u. . - - . . - -. w..- ..a_.__.a w .a _u , .

+ , .

Radiological Environmental Program Summary Seabrook Nuclear Power Stahon, Seabrook, NH (January . December 1986)

MEDIUM: Milk (TM) UNITS: pCilkg trdcator Stetw.s Station With Highest Mean Control Stations Radionuclides Mean Sta. Mean Mean (No. Anapes) Required Range Range Range (Non-Routine *) LLD (No. Detected **) (No. Detected **) (No. Detected")

Be.7 (108) -2.6E O 20 2.6E O 1.sz -1 (0) ( -3.1 - 2.7) E 1 ( -8. 9 - 21.7) E O ( -3.7 - 2.3)E 1 (0/ 72) (0/ 18) (0/ 36)

K.40 (108) 1.5E 3 is i.e5 3 1.4E 3 (0) ( 1.2 - 2.0)E 3 ( 1.7 - 2.01E 3 ( 1.3 - 1.5)E 3 (72/ 72) (le/ is) (36/ 36)

Cr41 (108) -7.ex -1 21 2.4E o 7.1x -1 (0) ( -3.1 - 2.0)E 1 ( -2.3 - 3.7) E 1 ( -2.3 - 4. 6) E 1 (0/ 72) (0/ 18) (0/ 36)

Mn44 (108) 4.0E -2 21 3.05 -1 -9.5E -3 (0) ( -1.7 - 2.5) E O ( -1,3 - 3.8)E O ( -2.5 - 3.8) E O (0/ 72) (0/ 18) (0/ 36)

Co47 (108) 4.6E -2 16 5.8E -1 2.7E -2 (0) ( -1.9 - 4.0)E o ( -1.1 - 4.0)E O ( -3.0 - 2.5)E O (0/ 72) (0/ 18) (0/ 36)

Co48 (108) -3.3E -1 20 -1.7E -2 -3.5E -1 (0) ( -3.8 - 3.0) E O ( -4.4 - 2.9)E D ( -4.4 - 2. 9)E O (0/ 72) (0/ 18) (0/ 36)

Fe48 (105) -5.3E -1 16 1.2E -2 -1.5E -1 (0) ( -1.1 - 1. 2) E 1 ( -9.0 - 10. 9) E o ( -7.6 - 9.9)E D (0/ 72) (0/ 1s) (0/ 36)

Co40 (108) 2.9E -1 04 5.9E -1 2.6E -1 (0) ( -4.5 - 4.2)E O ( -1.8 - 3. 6) E O ( -4.0 - 3.2)E O (0/ 72) (0/ 18) (0/ 36)

Zn46 (108) -1.1E o 16 -3.eE -1 -1.5E 0 (0) ( -9. 9 - 18.5) E O ( -9. 9 - 18. 5) E o ( -7.7 - 6.3)E O (0/ 72) (0/ 18) (0/ 36)

So-76 (108) -1.7E -2 21 6.0E -1 2.1E -1 (0) ( -6.0 - 3.8)E O ( -3.s - 4.e)E o ( -3.8 - 4.6)E o (0/ 72) (0/ 18) (0/ 36)

Zr.86 (108) 3.es -1 1s 1.2E o 7.1E -1 (0) ( -6.3 - 6.1)E O ( -4.9 - 5.e)E o ( -4.9 - 6.4)E D (0/ 72) to/ to) (0/ 36)

Ru.103 (108) -1.2E O 16 *7.eE *1 -1.2E O (0) ( -4. s - 2. 3)E O ( -4.2 - 2.3)E O ( -4.6 - 1. 3) E O (0/ 72) (0/ 18) (0/ 36)

Ru.106 (108) -2.7E -1 16 1.7E o -2.9E O (0) , ( ~4.1 - 3. 9) E 1 ( -4.1 - 3. 6) E 1 ( -3.2 - 2. 7) E 1 (0/ 72) (0/ 18) (0/ 36)

4

~,

Radioeogical Env*ronmental Program Summary Seabrook Nuclear Power Station, Seatwook, NH (January December 1996)

MEDIUM: e~k (TM) UNITS: pCVkg indicator Stations Station With Highest Mean Control Stations Radionuchdes Maan Sta. Mean Mean

(No. Analyses) Required Range Range Range (Non-Routine *) LLD (No. Detected **) (No. Detected") (No. Detected **)

1

)

Ag.110M (108) 3.6E -1 16 8.2E -1 3.11 -1 i

(0) ( -4.4 - 6.1)E D ( -2. 6 - 6.1) E O ( -5.1 - 6.1)E O i

(0/ 72) (0/ 18) (0/ 36)

Sb-124 (108) 6.7E -3 16 1.8E O 8.2E -1 (0) ( -1. 2 - 0. 7) E 1 ( -3.3 - 7.1) E O ( -5.8 - 11.0)E O (0/ 72) (0/ 18) (0/ 36) l.131 (108) 1 4.1E -2 16 5.0E -2 2.2E -2 (0) ( -6. 6 - 19. 4) E -2 ( -6. 6 - 17.0) E -2 ( -7.1 .22. 2) E -2 i (0/ 72) (0/ 18) (0/ 36)

Cs-134 (108) 15 -2.8E -1 09 -1.5E -1 -4.2E -1 (0) ( -7.3 - 4.7) E O ( -2.0 - 2.6)E O ( -5.6 - 2.5)E O 4 (0/ 72) (0/ 18) (0/ 36)

Cs.137 (108) 18 3.2E O 16 4.3E 0 1.7E O (0) ( -2.0 - 8.0)E O ( 4.2 - 79.7)E -1 ( -1.6 - 10.1)E O !

(9/ 72) (4/ 18) (1/ 36) {

Ba.140 (108) 15 -1.2E -1 04 2.4E -1 -9.2E -2

I (0) ( -4. 0 - 5. 9) E D ( ~2.1 - 3.7) E O ( -5.4 - 3.3)E O )

(0/ 72) (0/ 18) (0/ 36) 9 l 1

Co.141 (108) -2.1E -1 21 2.9E -1 -9.0E -2 I 1

(0) ( -5.6 - 8.2)E O ( -4.0 - 6.0)E O ( -5.5 - 7.6)E O

.i (0/ 72) (0/ 18) (0/ 36)

1 Co-144 (108) -1.1E 0 09 1.43 0 6.0E -1 (0) ( -2.4 - 3.6)E 1 ( -2.1 - 1.5)E 1 ( -1.0 - 1.5)E 1 (0/ 72) (0/ 18) (0/ 36)

Th-232 (108) 2.8E -1 20 2.4E O 5.1E -1 (0) ( -1.6 - 1.8)E 1 ( -8. 0 - 11.1) E O ( -1.1 - 1.1) E 1 1

j (0/ 72) (0/ 18) (0/ 36)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A?4

" The fraction of sample analyses yielding detectable measu*ements (i.e. >3 standard dewatens) is shown in parentheses.

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D) Surface Water Surface water (sea water) grab samples are required at two locations monthly. A gamma analysis is performed on each sample. A tritium analysis is performed on the quarterly composite of these samples. Sea Water sample (WS-51) was not collected from Ipswich Bay (control station) for the month of February. This was due to rough seas and weather that continued for the entire collection period.

The only radionuclide detected in 1996 was naturally occurring K-40, l

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.. _ _ _ . . - _ _ _ _ _ . _ _ . . _ . . . _ _ _ -_ _ _-._m . _.

i Rarrological Environmental Program Summary Seabrook Nuclear Power Station. Seabrook. NH l (January. December 1006)

. MEDIUM. Sea Water (WS) UNITS: pCilha i

.Ind.ic.a.t.o.r

. S.t.a.t.k.m..s.... .S.t.a.t.io.n..W.

. it.h..H..igh.e.st.Me.a..n.. .C.on.t.ro.l.S..t.e.h.o.ns..

j Resonuclides Mun Sta. Mean Mean (No. Analyses) Required Range Range Range (Nor>-Routine") LLO (No Detected") (No. Detected") (No. Detected")

3 H4 (0) 3000 -4.7E 1 01 -4.75 1 -1.4E 2 (0) ( -1. 4 - 0. 8) E 2 ( -1.4 - 0.s)E 2 ( -1.0 - -1.0)E 2 (0/ 4) (0/ 4) (0/ 4)

Be-7 (23) -4.0E 0 51 7.2E -1 7.25 -1

}

j (0) ( -1.s - 0.8)E 1 ( -s.e - s.4)E O ( -0.s - s.4)E c (0/ 12) (0/ 11) (0/ 11)

K.40 (23) 2.9E 2 01 2.sE 2 2.7E 2 a

(0) ( 2.5 - 3.4)E 2 ( 2.5 3.4)E 2 ( 2.1 - 3.5) E 2 l (12/ 12) (12/ 12) (11/ 11) '

j Cr41 (23) -s.1E -1 01 -6.1E -1 -2.es 0

! (0) ( -1.4 - 0.s) E 1 ( -1.4 - c.e)E 1 ( -2.3 - 2.13E 1 4 (0/ 12) (0/ 12) (0/ 11)

Mn44 (23) 15 -1.2E -1 31 4.2E -1 4.2E -1

, (0) ( -2.2 - 1.2) E o ( -5.9 - 1s.4)E -1 ( -5.9 - 1s.4)E -1 (0/ 12) (0/ 11) (0/ 11) l 4

i I Co47 -1.1E -1 51 5.8E -1 5.8E -1 (23)

(0) ( -1.2 - 1.1)E O ( -8.1 - 1'7. 7) E ~1 ( -0.1 - 17.7) E -1 l (0/ 12) (0/ 11) (0/ 11)

Co48 (23) 15 3.2E -2 01 3.25 -2 1.4E -2 ,

(0) ( -s . 6 - 11. 5) E -1 ( -s . s - 11.5) E -1 ( -1.5 - 1.5)E O l (0/ 12) (0/ 12) (0/ 11) l l

Fede (23) 30 2.75 -1 81 2.7E -1 1.se -1 (0) ( -7.1 - 5.3)E o ( -7.1 - 5.3)E O ( -5.0 - 4.7)E o (0/ 12) (0/ 12) (0/ 11)

Co4e (23) is 1.35 -1 31 2.9E -1 2.9E -1 (0) ( -1.5 - 2.4)E O ( -4.1 - 1s.215 -1 ( -4.1 - ss.2)E -1

(0/ 12) (0/ 11) (0/ 11)

Zn46 (23) 30 -s.sE -1 01 -s sE -1 -9.9E -1 (0) ( -4.s - s.s)E D ( -4.s - s.s)E o ( -4. s - 3.7) E O (0/ 12) (0/ 12) (0/ 11) l So-75 (23) -1.7E -1 51 v.or -2 4.0E -2

]

(0) ( -2.1 - 1.5)E O ( -2.1 - 2. 9) E O ( -2.1 - 2.9)E O (0/ 12) (0/ 11) (0/ 11)

Zr48 (23) 15 -5.4E -1 51 5.5E -1 5.5E -1 (0) ( -3.0 1.7) E O ( -1.4 - 2.5)E o ( -1. 4 - 2. 5) E O i

(0/ 12) (0/ 11) (0/ 11) 4

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i Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January -December 1980)

MEDIUM: Sea Water (WS) UNITS. oCilka M.T 8.D.D... 8.D..$.T..D.D..D.. D.D 8.D.

Radeonuclides Mean Sta. Mean Mean (No. Analyses) Required Range Range Range (Non-Routine') LLD (No. Detected") (No. Detected") (No. Detected **)

Ru-103 (23) -1.3E O 01 -1.3E O -1.4E 0 (0) ( -3.5 - 0.s)E O ( -3.5 - 0.s)E o ( -2. 9 - 1.2) E O (0/ 12) (0/ 12) (0/ 11)

Ru-its (23) -1.4E o 51 -8.5E -1 -e.5E -1 (0) ( -1.0 - 1.0)E 1 ( -1.0 - 0.9)E 1 ( -1.0 - 0.9)E 1 (0/ 12) (0/ 11) (0/ 11)

Ag.110M (23) -1.3E O 31 1.25 -1 1.2E -1 (0) ( -3.2 - 1.4)E O ( -2.3 - 2.4)E O ( -2,3 - 2.4)E O (0/ 12) (0/ 11) (0/ 11)

Sb.124 (23) 9.1E -1 01 9.11 -1 3.3E -1 (0) ( -1.7 - 4.8)E o ( -1.7 - 4.0)E O ( -9.7 - 31.4)E -1 (0/ 12) to/ 12) (0/ 11) 1-131 (23) 15 1.2E O 01 1.25 0 4.7E -1 (0) ( -2.7 - 5.5)E O ( -2.7 - 5.5)E O ( -2.1 - 4.0)E O i (0/ 12) (0/ 12) (0/ 11)

Cs-134 (23) 15 -2.0E -1 61 s.15 -1 s.it -1 (0) ( -2.2 - 1.5)E D ( -7.9 - 30.0)E -1 ( -7. 9 - 30.0) E -1 )

(0/ 12) (0/ 11) (0/ 11)

Cs-137 (23) le 9.5E ~2 01 9.5E -2 -2,2E -1 (0) ( -1.6 - 1.0)E O ( -1,6 - 1.0)E O ( -2.1 - 1. 9) E O (0/ 12) (0/ 12) (0/ 11)

Ba.140 (23) 15 -1.1E 0 31 -2.1E -1 -2,1E -1 (0) ( -3. 9 - 1.1) E O ( -2.3 - 1.2)E 0 ( -2.3 - 1.2)E O (0/ 12) (0/ 11) (0/ 11)

Co-141 (23) -e.2E -1 31 -7.9E -1 -7.9E -1 (0) ( -5.2 - 2.5)E o ( -4. 4 - 3.7) E O ( -4.4 - 3.7)E o (0/ 12) (0/ 11) (0/ 11)

Co.144 (23) -3.2E -1 81 -3.2E -1 -1.2E O (0) ( -e.3 - 7.e)E O ( -e.3 - 7.e)E o ( -1. 6 - 0.a) E 1 (0/ 12) (0/ 12) (0/ 11)

Th-232 (23) 1.0E O 01 1.0E O 4.0E -1 (0) ( -4.5 - e.3)E O ( -4.5 - e.3)E O ( -5.2 - 4.7) E O (0/ 12) (0/ 12) (0/ 11)

N0n-Rou3ne refera to those rad:Onuchdes that exceeded the ReportnD Levels in ODCM Table AM.

" The fracton of sample analyses yloiding detectable measurements (1 e. >3 standard GMations) is shown in parenthemes

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E) Grcund Water There is no requirement to collect ground water samples. The samples that were obtained on-site were analyzed for gross-beta activity, gamma-emitters and tritium. The gross beta activity detected is due primarily ,

to naturally occurring radium and its daughter products.

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FIGURE 3. 5 GROSS-BETA MEASUREMENTS OF GROUND WATER SEABROOK STATION 20 20 18i -

-18 16i .

F16 14i

~-14 3

12 -12 x -

)

0 10i -

-10

" 8 -8 6~ -6

C 4 -- " -4 2-~

}2 0~ , ,

, , , O Jan Apr Jul Oct Jan 1996

--e- WG-01 Seabrook Town Wells

--o- WG-13 Seabrook Station Well No. 13

)

35.

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FIGURE 3.5.1 GROSS-BETA MEASUREMENTS OF GROUND WATER SEMI-ANNUAL AVERAGES SEABROOK STATION 40 40 30- -30

~

Chernobyl

~

& May 1986 x '

20- 5% Criticality -20 D

Q - June, 1989 Full Power

}

May, 1990 10- . -10 D

0 ,

, 0 1984 1986 1988 1990 1992 1994 1996 1998

-c- WG-01 Seabrook Town Wells

-o- WG-13 Seabrook Station Well No. 13 36.

1 Radiological Enviror$ mental Program Summary l Seabrook Nuclear Power Station, Seabrook. NH I (January December 1006)

MEDIUM. Ground Water fWG) UNITS: oCilka I N.T. .D... ..D. D.T..U.D.D.. .C,g,,S,g,,,,,

Radionucikles Mean Sta. Mean Mean (No. AnaW) Required Range Range Range (Non-Routine *) LLD (No. Detected") (No. Detected **) (No. Detected")

I GR4 (s) 4 5.05 0 13 5.1E o No DATA (0) ( 2.4 - s.2)E O ( 2.4 - s.2)E o (s/ e) (4/ 4)

H4 (8) 3000 8.01 1 13 s.55 1 wo DATA l (0) ( -1. 9 - 2. e) E 2 ( -1..s - 1.e)E 2

)

(0/ e) (0/ 4) !

se 7 (g) -3.55 -1 13 5.1E O wo DATA (0) ( -1. 7 - 1. 5) E 1 ( 1.7 - 13.4)E O (0/ e) (0/ 4)

K-40 (8) -a.s* -1 01 3.2E o no DATA l (0) ( -3.3 - 3.2)E 1 ( -3.3 - 3.2)E 1 (0/ s) (0/ 4)

Cr-81 (s) 2.1E -2 13 2.68 -1 No DATA (0) ( -1. 2 - 1. 7) E 1 ( -1.2 - 1.7)* 1 (0/ s) (0/ 4)

Mn44 (8) is -4.sz -1 01 -4.4E -1 No DATA (0) ( -1. 9 - 0. 9) E O ( -1.5 - 0.s)E D (0/ s) (0/ 4)

Co47 (8) 7.1x -2 et 2.sE -1 No DATA (0) ( -1.4 - 1. 3) E o ( -1.4 - 1.3)E O (0/ e) (0/ 4)

Co48 (s) 15 -3.3E -1 01 -2.0E -1 No DATA (0) ( -1.s - 1.3)E o ( -1.4 - 1.2)E O (0/ 8) (0/ 4)

Fe40 (2) 30 -6.45 -1 13 6.5E -2 No DATA (0) ( -5.4 - 6.0)E o ( ~5.4 - s.0)E D (0/ 8) (0/ 4)

Co40 (3) is -7.sE -2 13 5.ss -2 NO DATA (0) ( -1. s - 3.2) E O ( -1.9 - 0.2)E O (0/ e) (0/ 4) 2n45 (8) 30 s.0E *2 31 3.4E o No DATA (0) ( -7.e - 12.2)E O ( -1. s - 12.23 E 0 (0/ e) ':0/ 4)

Se-75 (8) -2.sE -1 et 2.sE -1 No DATA (0) ( -1. s - 1.7) E o ( -1. 2 - 1. 7) E 0 (0/ e) (0/ 4)

f h

Rad 60iogical Enytronmental Program Summary Seabrook Nuclear Power Stanon, Seabrook, NH (January. December 1998)

MEDIUM. Groundwater fWG) UMTS. DCilka i.n.d.ic.a.t.o.r

.. S.t.a.h..o.n.s.... .S.t.a.t.io.n..W..it.h..H..igh.e.st.M..e.an..

. . .. C.o..n.t.r.o.l.Sta.tio.ns Radiorulides Mean Sta. Mean Mean (No. Analyses) Required Range Range Range (Non-Routine") LLD (No. Detected") (No. Detected") (No. DMart")

Zr46 (8) 15 -4.is -2 13 3.2s -1 No DATA (c) ( -3.3 - 2.e)s o ( -3.3 - 2.e)s o (o/ e) (o/ 4)

Ru-103 (8) -s.5s -1 31 -4.5s -1 No DATA >

(0) ( -3.1 - o.4)s o ( -1. 4

o . 4 ) E o (0/ e) (o/ 4)

Ru-108 (8) -1.4s o 01 4.3s o No DATA (c) ( -1.s - 1.3) 1 ( o.0 - 1.3): 1 (0/ e) (0/ 4)

Ag-110M (8) -1.es -1 13 1.2s -1 No DATA l (0) ( -1.5 - 1.1)s o ( -5.1 - 7.2) s -1 (o/ e) (o/ 4)

Sb-124 (0) -2.os 0 01 -1.os o No DATA (c) ( -6.e - 2.1)s o ( -4.2 - 2.1)s o (0/ a) (0/ 4) 1-131 (8) 15 2.5s .1 13 1.2s o No DATA (0) ( -2. 9 - 2.0) o ( 3.6 - 20.3) -1 (o/ r; (o/ 4)

Co.134 (8) 15 -2.3s 0 13 -2,2s o No DATA (c) ( -s . s - 1.1) s o ( -s.s - 0.e)s o (o/ e) (o/ 4)

Cs-137 (8) 10 -2.5s -1 13 -4.5s -2 NO DATA (c) ( -1.5 - o.6)s o ( -1. 0 - 0. 8) s o (0/ e) (0/ 4)

Ba-144 (3) 15 2.7s -1 gj 6.5s -1 No DATA (c) ( -2.4 - 2.6) o ( -1.1 - 2.5)s o to/ e) (c/ 4)

Co-141 (3) -4.7s -1 01 2.2s -1 No DATA (0) ( -3.0 - 4.9) E o ( -2.1 - 4.9)s o (0/ e) (0/ 4)

Co-144 (8) 5.5s -1 01 2.3s o No DATA i I

(c) ( -3.7 - 11.7) o ( -3. 7 - 11. 7) : o (o/ e) (o/ 4)

Th-332 (8) -2.oz -1 13 s.4s -1 No DATA (o) ( -7.4 - 10.2) s o ( -7.4 - 10.2) o (0/ e) to/ 4)

NorwRouttne refers to those radionucildes that exceeded the Reporting Leve6s in ODCM Table A.5-3.

" The fraction of samp6e anahmes yie6deng detectable rnessurements (i e. >3 standard devletions) is shown in parentheses l

F) Sediment Semiannual sediment sampling is required at one location, although a total of five locations, three indicator and two control are collected.

Each sediment core was sectioned into 5 centimeter segments. A gamma analysis was performed on each section.

The only radionuclides detected in 1996 were naturally occurring K-40,

! Th-232 and its natural daughters.

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4 Rad 6ological Environmental Program Summery Seabrook Nuclear Power Station, Seabrook, NH '

(January . December 1000)

. MEDIUM: Sediment (SE) UNnS: pCilkg Indicator Stations Station With Highest Mean

.................... Control Stations I

Radionuclides Mean Sta. Mean Mean (No. Aralyses) Required Range l Range Range (Noa-Routine *) LLD (No. Detected **) (No. Detected *) (No. Detected") (

! )

Be-7 (30) -6.3E 1 52 5.15 1 2.0E o (0) ( -2.4 - 1.4)E 2 ( -3.1 - 2. 9) E 2 ( -3.1 - 2.9)E 2 (0/ 18) (0/ 6) (0/ 12)

K40 (30) 1.6E 4 03 1.7E 4 1.4E 4 (0) ( 1.1 - 2.0)E 4 ( 1.6 - 2.0)E 4 ( 1.1 - 1.0)E 4 (18/ 18) (6/ 6) (12/ 12)

Cr41 (30) -3.7E 1 57 8.61 1 4.9E 1 l (0) ( -4. 4 - 3. 7) E 2 ( -1. 0 - 2.4) E 2 j ( -3.7 - 3.4) E 2 (0/ 18) (0/ 6) (0/ 12) j M#a44 (30) -3.9E O 03 9.0E O 3.2E O

! (0) ( -6. 4 - 4. 6) E 1

' ( -9.5 - 4 5.7) E 0 ( -2.1 - 2.3)E 1 (0/ 18) (0/ 6) (0/ 12)

Co47 (30) -5.6E -1 02 1.11 1 -2.7E O (0) ( -2.3 - 5. 8)E 1 ( -5.2 - 57.9)E O ( -2.9 - 1.5)E 1 (0/ 18) (0/ 6) (0/ 12)

Co48 (30) -2.0E o Os 2.4E 1 1

-3.7E o (0) ( -5. e - 4.0) E 1 j

( -3.7 - 4.0)E 1 ( -2. 5 - 2.0) E 1 l (0/ 1s) (0/ 6) (0/ 12) l Fe49 (30) ~7.9E O $7 6.1E O 3.8E 0 (0) ( -1. 2 - 0. 9)E 2 ( -3. 8 - 4.2) E 1 ( -4.7 - 6.8) E 1 (0/ 18) (0/ 6) (0/ 12) co40 (30) 2.eE O 02 6.5E 0 -6.sE o (0) ( -3.9 - 4.8)E 1 ( -1. 0 - 4. 8) E 1 ( -2.2 - 1.1)E 1 (0/ 18) (0/ 6) (0/ 12)

Zn45 (30) -2.5E 1 $2 5.0E 1 4.2E 1 (0) ( -1.8 - 1.1) E 2 ( -6.5 - 21.51E 1 ( - 6 . 5 - 21. 5) E 1 (0/ 18) (0/ 6) (0/ 12)

Se-75 (30) -4.2E D 57 -1.6E O -1.2E 1 (9) ( -4.3 - 7.1)E 1 ( -2.3 - 4.0)E 1 ( -6.1 - 4.6)E 1 (0/ 18) (0/ 6) (0/ 12)

Zr45 (30) 1.4E 1 52 3.63 1 2.7E 1 (0) ( -4.2 - 11. 8) E 1 ( 2.0 - 4.s)E t ( -3. 6 - 14. 9) E 1 (0/ 18) (0/ 6) (0/ 12)

Ru.103 (30) 6.5E 0 Os 2.4E 1 -5.5E o (0) ( -3.3 - 5.9)E 1 ( -3.3 - 5. 9) E 1 ( -3.4 - 2.5)E 1 (0/ 18) (0/ 6) (0/ 12)

Ru-106 (30) -4.43 1 08 1.6E 1 -2,3E 1 (0) , ( -3.3 - 2.9)E 2 ( -1. 8 - 2. 9) E 2 ( -2. 2 - 1. 7) E 2 (0/ 18) (0/ 6) (0/ 12)

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Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seatwook. NH

, (January December 1008) i MEDIUM: Sedement (SE) UNITS: pCilkg Indicator Stations Station With Highest Mean Control Stations n.................. ............................. ....................

Radionuclides Mean Sta. Mean Mean

(No. Anatyees) Required Range Range Range (Non-Couhne') LLD (No. Detected") (No. Detected **)

(No. Detected")

4 Ag-110M (30) -4.4E o 57 2.6E 1 1.7E 1 i

(0) ( -4.9 - 3.9)E 1 ( -1. s - e . 3) E 1 ( -2.0 - 8.3) E 1

] (0/ 1e) (o/ 6) (o/ 12) 7 Sb-124 (30) -2.2E 1 37 -1.pt o -e.6E o

(0) ( -9.7 - 2.6) E 1 ( -5.5 - 3.7)E 1 ( -1.7 - o.4)E 2 i

(o/ 18) (0/ 6) (o/ 12) j l.131 (30) -1.5E o 67 4.3E 1 i

2.7E 1 i 3

(0) ( -s.o - 8.1)E 1 ( -4.s - 25.s)E 1 ( -4.s - 25.9)E 1 (o/ 1s) (o/ 6) (0/ 12)

Cs.134 (30) 150 1.3E 1 02 3.5E 1 -5.5E o

} (0) ( -4.s - 10.o)E 1 ( ~2.7 - 10.0) E 1 ( -3.2 - 2.9)E 1

} (o/ 1e) (o/ 6) (o/ 12) 1 Cs-137 (30) iso -2.3E o 02 3.5E o .-1.3E o (0) ( -5.8 - 6.1)E 1 ( -4.4 - 6.135 1 ( -1.s - 1.5)E 1

(0/ 18) (0/ 6) (o/ 12)

I Be-140 (30) -1.eE 1 Os -1.1E 1 -2.25 1 i ( -6.5 - 1.9)E 1 ;

(0) ( -2.2 - 1.e)E 1 ( -5.6 - 3.e)E 1

) (0/ 18) (0/ 6) (o/ 12) l Ce 141 (30) 1.4E 1 03 2.2E 1 7.3E o (0) ( -2.3 - 7.3)E 1 ( -1.3 - 4 4.3) E o ( -2.7 - 6. 9) E 1 (0/ 18) (o/ 6) (0/ 12)

Co.144 (30) -1.2E 1 52 5.9E o -1.5E 1 (0)- ( -2.3 - 1.e)E 2 ( -1. 3 - 0.7) E 2 ( -1. 6 - 0. 7)E 2 (o/ le) (0/ 6) (o/ 12) I Th-232 (30) 4.sE 2 52 1.eE 3 1.ot 3 (0) ( 6.7 - 131.9)E 1 ( 1. 5 - 1. 9) E 3 ( 1.5 - 19.5)E 2 (11/ 1e) (6/ 6) (9/ 12)

Non-Routine refers to those radionuclides that exceeded the Reptding Levels in ODCM Table A.5-3.

" The fraction of sample anatyees yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses i

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G) Fish Semiannual fish and invertebrate samples are required from two locations. This section presents the results for fish sampling only.

Invertebrate results may be found in sections entitled Lobsters and Shellfish. Samples were collected from two locations quarterly. A

gamma analysis was performed on each sample.

During the year the fish species collected from station no 03 were Winter Flounder and Common Yellow Tail Flounder. The species collected from station no.53 was Winter Flounder.

The only radionuclide detected in fish samples in 1996 was naturally occurring K-40.

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Radeological Environmental Program Summary Seabrook Nuclear Power Station. Seabrook, NH (January Decemberiets)

MEDIUM: Fish (FH) UNITS: pCWkg Indicator Stations Station With Highest Mean Control Stations Rad 6onuchdes Mean Sta. Mean Mean (No. Analyses) Required Range Range Range (Non-Routine *) LLD (No. Detected") (No. Detected") (No. Detected")

Be.7 (8) -3.7E 1 03 -3.7E 1 -4.3R 1 (0) ( -1. 6 - 0.7) E 2 ( -1. 5 - 0. 7) E 2 ( -1.2 - 0. 9) E 2 (0/ 4) (0/ 4) (0/ 4)

K40 (8) 3.1E 3 53 3.5E 3 3.5E 3 (0) ( 2. 9 - 3.5) E 3 ( 2.7 - 4.0)E 3 ( 2.7 - 4.0)E 3 (4/ 4) (4/ 4) (4/ 4)

Cr41 (8) -4.2E 1 63 -e.7E O -e.7E O (0) ( -2.0 - 0.2)E 2 ( -7.2 - 10.2)E 1 ( -7.2 - 10.2)E 1 (0/ 4) (0/ 4) (0/ 4)

Mn44 (e) 130 9.7E O 03 9.7E O 2.3E O (0) ( 7.4 - 141.6)E -1 ( 7.4 - 141. 6) E -1 ( -3 s - 16.0)E O (0/ 4) (0/ 4) (0/ 4)

Co47 (B) -1.5E o 63 4.1R -1 4.1E -1 (0) ( -5.1 - 1. 4) E o ( -3.2 - 4.7) E O ( -3.2 - 4.712 0 (0/ 4) (0/ 4) (0/ 4)

Co48 (B) 130 -9.0E -1 03 -9.0E -1 -1.6E o *

(0) ( -e.3 - 6.4)E o ( -e.3 - 6.4)E O ( -e.5 - 3.1)E o (0/ 4) (0/ 4) (0/ 4)

Fe48 (8) 260 -e.7E O 63 -6.1E o -6.1x 0 (0) ( -4.s - 2.9)E 1 ( -1.0 - -0.2)E 1 ( -1. 0 - -0. 2) E 1 (0/ 4) (0/ 4) to/ 4)

Co40 (I) 130 2.sE O 63 3.5E O 3.5E O (0) ( -6.5 - 17.9)E O ( -9.1 - 18.1) E o ( -9.1 - 18.1)E o (0/ 4) (0/ 4) (0/ 4)

Zn46 (8) 260 -1.4E 1 03 -1.4E 1 -1.7E 1 (0) ( -4. 5 - 1.3) E 1 ( -4.5 - 1. 3) E 1 ( -4.3 - 2.4)E 1 (0/ 4) (0/ 4) (0/ 4)

Se.76 (8) -1.21 1 63 4.eE O 4.sE D (0) ( -2.4 - -0.2)E 1 ( -7.4 - 14.2)E o ( -7.4 - 14.2)E O (0/ 4) (0/ 4) (0/ 4)

Zr.95 (B) -1.4E D 03 -1.42 0 -5.3E o (0) ( -2.3 - 2.1)E 1 ( -2.3 - 2.1) E 1 ( -2.3 - 0.9)E 1 (0/ 4) (0/ 4) (0/ 4)

Ru.103 (5) 3.2E O 03 3.2E o 2.25 0 (0) ( -1.3 - 5.0)E D ( -1. 3 - 5.0) E O ( -7.0 - 9.1)E O

) (0/ 4) (0/ 4) (0/ 4)

Ru.106 (8) 4.2E 1 03 4.2E 1 5.4E O (c) , ( -6.2 - es.6)E O ( -6.2 - es.6)E O ( -4.6 - 5.4)E 1 (0/ 4) (0/ 4) (0/ 4)

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Radiological Environmental Program Summary '

Seabrook Nuclear Power Station, Seabrook, NH l

(January . December 1996)

MEDIUM: Fish (FH) UNITS: PCukg 4

Indicator Stations Station With Highest Mean

. Control Stations

Radxmuchdes Mean Sta. Mean Mean (No. Analysee) Required Range Range Range (Non-Routine *) LLD (No Detected **) (No. Detected") (No. Detected")

Ag.110M (B) -4.7E -1 63 1.3E -1 1.3E -1 (0) ( -5.9 - 3.2)E o ( -9. 5 - 7. 9)E O ( -9.5 - 7. 9) E O i

(0/ 4) (0/ 4) (0/ 4)

Sb.124 (B) ~7.9E -1 03 -7. 9E -7. -9.e5 -1 (0) ( -2.2 - 1.9)E 1 ( -2,2 - 1. 9) E 1 ( -1. 9 - 0.5) E 1 (0/ 4) (0/ 4) (0/ 4) f

1131 (3) -1.eE 1 63 3.7E o 3.7E o (0) ( -e.0 - 0.9) E 1 ( -2. 7 - 10.1) E O ( ~2.7 - 10.1)E O (0/ 4) (0/ 4) (0/ 4)

Cs.134 (8) 133 -e.4E o $3 -5.5E O '

-5.5E o (0) ( -1.5 - 0.0)E 1 ( -2.s - 1.s) E 1 ( -2.8 - 1.8)E 1 (0/ 4) (0/ 4) (0/ 4) '

Cs.137 (s) 150 3.6E -1 63 4.0E 0 4.0E D (0) ( -e.2 - 18.1)E o ( -2.1 - 13. 7) E D ( -2.1 - 13.7) E 0 {

(0/ 4) (0/ 4) (0/ 4) 1.4E 1 Ba.140 (8) 03 1.4E 1 9.11 0 (0) ( 4.6 - 25.4)E o ( 4.s - 25.4)E o ( 0.0 - 19.6)E O j (0/ 4) (0/ 4) (0/ 4) !

Co.141 (8) 5.2E O 03 5.2E o -1.6E -2 (0) ( -1.9 - 1.9)E 1 ( -1. 9 - 1. 9) E 1 ( -1.5 - 1. 3) E 1 (0/ 4) (0/ 4) (0/ 4)

Co.144 (8) -1.9E o 03 -1.9E o -3.0E 1 (0) ( -5.1 - 7.112 1 ( -5.1 - 7.1) E 1 ( -7.4 - 2.9)E 1 (0/ 4) (0/ 4) (0/ 4)

Th-232 (8) 2.eE 1 03 2.st 1 -3.4E -1 (0) ( -4.3 - 7.2)E 1 ( -4.3 .7.2)E 1 ( -1. 7 - 3. 0 ) E 1 (0/ 4) (0/ 4) (0/ 4)

Non-Routine refers to those radionuclKles that exceeded the Reporting Levels in ODCM Table A.5 3.

- The fracton of sample analyses yielding detectable measurements (i.e. >3 standard deviabons) is shown in parentheses I

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H) Loboters Semiannual fish and invertebrate samples were required from two locations. This section provides the results for one type of invertebrate only - American lobsters. Fish and other invertebrate results may be found in the sections entitled Fish and Shellfish, respectively. A gamma analysis was performed on each sample. Lobsters from both the indicator and control locations were not collected as part of the second collection (December) for the year. Numerous storms and rough seas in the Discharge Area prohibited harvesting. Only undersized juvenile lobsters were found at the control station.

The only radionuclide detected in lobster samples in 1996 was naturally occurring K-40.

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I Rad 6ological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January December 1006)

MEDIUM: American Loboter (HA) UNITS: pCL/kg t t

Indicator Stations Stahon Wlth Highest Mean Control Stations I Radionuchdes Mean Sta. Mean Mean (No. Analyses) Required Range Range Range (Non-Routine *) LLD (No. Detected") (No. Detected") (No. Detected")

Be.7 (2) 7.9E O 04 7.9E o -5.5E 1 (0)

(0/ 1) (0/ 1) (0/ 1)

K.40 (2) 2.31 3 54 2.8E 3 2.8E 3 (0)

(1/ 1) (1/ 1) (1/ 1)

Cr41 (2) 6.6E O 04 6.6E o -3.1E 1 (0)

(0/ 1) (0/ 1) (0/ 1)

Mn44 (2) 130 4.3E o 04 4.3E O 1.8E -1 l (0)

(0/ 1) }

(0/ 1) (0/ 1) l Co47 (2) 2.3E O 04 2.3E O -1.0E o (0)

(0/ 1) (0/ 1) (0/ 1)

Co40 (2) 130 1.4E O 04 1.4E O -1.13 1 (0)

(0/ 1) (0/ 1) (0/ 1)

Fede (2) 260 -4.3E 1 -1.8E 1 54 -1.8E 1 (0)

(0/ 1) (0/ 1) (0/ 1)

Co40 (2) 130 -6.7E O 54 2.8E 1 2.8E 1 (0) -

(0/ 1) (0/ 1) (0/ 1)

Zn45 (2) 260 -4.8E -1 04 -4.8E -1 -4.3E 1 (0)

(0/ 1) (0/ 1) (0/ 1)

Se-75 (2) -0.5E O 54 1.8E 1 1.81 1 (0)

(0/ 1) (0/ 1) (0/ 1)

Zr48 (2) -1.3E 1 54 1.3E O 1.31 0 (0)

(0/ 1) (0/ 1) (0/ 1)

Ru-103 (2) -8.0E O 54 3.5E O 3.5E o (0)

) (0/ 1) (0/ 1) (0/ 1)

Ru.106 (2) -6.1E 1 54 -3.7E O -3.7E O (0) .

(0/ 1) (0/ 1) (0/ 1)

RadkAogical Environmental Program Summary Seabrook Nuclear Power Station, Seabrook, NH (January December 1908)

MEDIUM: AmericanLobster (HA) UNITS pCUkg Indicator Stations Station With Highest Mean Control Stations Radionuchdes Mean Sta. Mean Mean (No. Analyses) Required Range Range Range (Non-Routine *) LLD (No. Detected") (No. Detected") (No. Detected **)

l Ag 110M (2) -5.3E -1 64 3.4E 1 3.4E 1 (0)

(0/ 1) (0/ 1) (0/ 1)

Sb 124 (2) 0.0E O 04 0.0E o -4.71 1 (0)

(0/ 1) (0/ 1) (0/ 1)

M31 (2) 2.0E 1 04 2.0E 1 1.sE 1 (0)

(0/ 1) (0/ 1) (0/ 1)

Cs-134 (2) 130 -2.0E 0 04 -2.0E O -3.4R 0 (0)

(0/ 1) (0/ 1) (0/ 1)

Cs-137 (2) 150 1.1E 1 64 1.5E 1 1.5E 1 (0)

(0/ 1) (0/ 1) (0/ 1) i Ba-140 (2) 2.0E 1 04 2.0E 1 -3.35 1 (0)

(0/ 1) (0/ 1) (0/ 1)

Co-141 (2) 4.9E -1 04 4.9E -1 -4.8E O (0)

(0/ 1) (0/ 1) (0/ 1)

Co-144 (2) 2.53 1 04 2.5E 1 3.eE O (0)

(0/ 1) (0/ 1) (0/ 1)

Th-232 (2) 4.7E o 64 5.4E 1 5.4E 1 (0)

(0/ 1) (0/ 1) to/ 1)

Non Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.5-3.

" The fraction of sample ana%es yieldeng detectable rnessurernents (i.e. >3 standard deviations) is shown in parentheses

)

I

_ . _ . ~ . . . . . _ . _ - . .. _ -. - _ ._.

I) Shellfish Semiannual fish and invertebrate samples are required from two locations. This section provides the results for shellfish samples only. Fish and other invertebrate results may be found in the sections entitled Fish and Lobsters, respectively. A gamma analysis was performed on each sample.

The only radionuclide detected in shellfish samples in 1996 was i

naturally occurring K-40.

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l Radiological Environmental Program Summary !

Seabrook Nuclear Power Station. Seabrook, NH l

(January - December 1996) l MEDIUM: Mussel (MU) UNITS: pCi/kg Indicator Stations Station Wlth Highest Mean Control Stations i Radionuclides Mean Sta. Mean Mean l (No. Analyses) Required Range Range Range l

(Non-Routine *) LLD (No. Detected") (No. Detected") (No. Detected")

l l Be-7 (8) 1.2E 1 59 8.1E 1 6.0E 1 l

(0) ( -1.0 - 0.7) E 2 ( 6.1 - 10.2) E 1 ( -4.7 - 101. 9) E O (0/ 4) (0/ 2) (0/ 4)

K-80 (8) 1.CE 3 09 1.2E 3 1.1x 3 (0) ( 5.9 - 16.0)E 2 ( 8.6 - 16.0)E 2 ( 6. 5 - 12. 4) E 2 (3/ 4) (2/ 2) (3/ 4)

Cr41 (8) 2.4E 1 09 5.9E 1 -2.9E 1 (0) ( -6.0 - 7.7)E 1 ( 4.2 - 7.7)E 1 ( -9.2 - s.4)E 1 (0/ 4) (0/ 2) (0/ 4)

Mn44 (8) 130 -3.0E O 59 1.2E 1 8.5E o (0) ( -7.7 - 4.5)E o ( 7.7 - 17.3)E o ( 2.1 - 17.3)E o (0/ 4) (0/ 2) (0/ 4) l Co47 (8) -3.9E o 59 6.6E O 6.1E O

{ (0) ( -1.3 - 0.2)E 1 ( 3.5 - 9.7) E D ( 3.5 - 9.7) E O l (0/ 4) l (0/ 2) (0/ 4)

Co48 (8) 130 -4.0E O 06 3.2E O -2.53 0 (0) ( -2.1 - 0.6)E 1 ( 2.5 - 61.5)E -1 ( -1.7 - 0. 6) E 1 (0/ 4) (0/ 2) (0/ 4)

Fe49 (8) 260 -6.6E 0 59 4.2E 1 2.5E 1 !

(0) ( -3,0 - 1.w,3 1. ( -1. 6 - 10.0) E 1 ( -3.3 - 10.0)E 1 (0/ 4) (0/ 2) (0/ 4)

Co40 (8) 130 7.8E O 00 9.0E o 3.2E o (0) ( -3.9 - 17.0)E o ( 4.5 - 13.5)E O ( -5.0 - 12.3)E D (0/ 4) (0/ 2) (0/ 4)

Zn45 (8) 260 -5.2E 0 06 -1.3E -1 -3.0E O (0) ( -1.6 - 0.5) E 1 ( -5.0 - 4.7)E O ( -1.9 - 1.5)E 7 (0/ 4) (0/ 2) (0/ 4)

Se.75 (8) 3.4E o 06 8.4E O -1.0E 1 (0) ( -4.2 - 18. 9) E O ( -2.2 - 18. 9) E o ( -1. 5 - -0. 7) E 1 (0/ 4) (0/ 2) (0/ 4)

Zr46 (8) -5.9E ~1 $p 1.2E 1 7.0E 0 (0) ( -1.2 - 0.9)E 1 ( 1. 0 - 1. 5) E 1 ( 3.0 - 14 5. 8) E -3 (0/ 4) (0/ 2) (0/ 4) f Ru 103 (8) 2.6E -1 00 6.7E o -2.8E o (0) ( -7.7 - 16.5)E o ( -3. 2 - 16.5) E O ( -7.4 - 3.3)E 0 i (0/ 4) (0/ 2) (0/ 4)

Ru.106 (8) 3.35 1 09 1.1E 2 -6.4E 1 (0) , ( -9.0 - 19.2)E 1 ( 3.2 - 19.2)E 1 ( -2.2 - 0. 6) E 2 f (0/ 4) (0/ 2) (0/ 4)

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-= - - - -- , _ _ . . . . - . _. . . - . - . . _ _ _ _ . . - - - , -

. c I

l Radiological Envirc,nmental Program Summary Seabrook Nuclear Powar Station. Seabrook NH (January - December 1996)

MEDIUM: Mussel (MU) UNITS: pCilkg indicator Stations Station With Highest Mean Control States

, Radionuchdes Mean Sta. Mean Mean

! (No. Analyses) Required Range Range Range f (Non-Routine *) LLD (No. Detected **)

r (No Detected") (No. Detected") j I

1 i i

) , ,Ag-110M (8) -6.0E O 66 0.0E O 1.3E O i

1 (0) ( -2.6 - 1.0)E 1 ( -2.7 - 18. 7) E D ( -1. 5 - 1. 9) E 1 (0/ 4) (0/ 2) (0/ 4)

$b-124 (8) -2.75 1 59 1.0E 1 -3.0E O l (0) ( -6.5 - -0.3)E 1 ( 5.s - 15.1)E O ( -2.7 - 1.5)E 1 (0/ 4) (0/ 2) (0/ 4) 1131 (3) 7.5E O 09 9.4E D -1.03 1 (0) ( 7.0 - 141.1)E -1 ( 4.8 - 14.1)E O ( -2.4 - 0.211 1 (0/ 4) (0/ 2) (0/ 4)

Cs-134 (8) 130 1.3E O $6 6.9E O -1,1E 0 (0) ( -9. 6 - 7.3)E o ( -2.6 - 16.5)E D ( -1. 0 - 1. 7) E 1 (0/ 4) (0/ 2) (0/ 4)

Cs-137 (8) 150 3.1E D 69 1.2E 1 4.3E O (0) ( -1.1 - 1.8)E 1 ( 4.4 - 20.1)E O ( -8.3 - 20.1) E O I (0/ 4) (0/ 2) i (0/ 4) l i

Ba-140 (8) 6.11 0 06 1.3E 1 -2.8E O {

(0) ( -7.9 - 21.0)E D ( 4.3 - 21.0)E o ( -2.0 - 1.0)E 1 (0/ 4) (0/ 2) (0/ 4) l '

I Co-141 (B) 5.05 0 06 1.3E 1 ~1.0E 1 (0) ( -4.8 - 14.2)E O ( 1.1 - 1.4)E 1 ( -3. 4 - 0. 5) E 1 ;

(0/ 4) (0/ 2) (0/ 4)

Co-144 (8) 1.0E 1 09 3.9E 1 3.4E 1 l

(0) ( -2. 6 - 5.1) E 1 ( 2. s - 5.1) E 1 ( 2.1 - 4. 9) E 1 (0/ 4) (0/ 2) (0/ 4)

Th-232 (8) -1.75 1 09 2.85 1 4.3E o (0) ( -1.3 - 0.6)E 2 ( -6.1 - 63.0) E O ( -2.5 - 6.4)E 1 (0/ 4) (0/ 2) (0/ 4)

Non-Routine refers to those radionuclides that eAeeded the Reporting Levels in ODCM Table A.5-3.

t

" The fracton of sample anatyees yielding detectable measurements (i.e. >3 standard deviations) is shown in parentheses.

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. - - .. - - _ . - - - . . _ . . - _ . _ = . . - . - . . _ - . . . . . . . . - -. ...

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J) Irigh Moos There is no requirement to collect Irish Moss samples. Semiannual samples were collected from two locations. A gamma analysis was ,

performed on each sample. )

l The only radionuclides detected in 1996 were naturally occurring Be-7 and K-40.

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i Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook. NH (January - December 1086)

MEDIUM: Irish Moss (AL) UNITS: pCilkg j indicator Stabons Station With Highest Mean Control Stations Radionuchdes Mean Sta. Mean Mean ,

l (No. Analyses) Required Range Range Range f (Non-Routine *) LLD (No. Detected") (No. Detected") (NO. Detected")

Be.7 (4) 1.3E 2 66 2.4E 2 2.4R 2 (0) ( 1.3 - 1.4)E 2 ( 1.3 - 3.5)E 2 ( 1.3 - 3.5)E 2 (0/ 2) (1/ 2) (1/ 2)

K.40 (4) 9.1E 3 06 9.1E 3 5.62 3 (0) ( s.6 - 9.5)E 3 ( 8.6 - 9.5)E 3 ( 4.6 - 6.6)E 3 (2/ 2) (2/ 2) (2/ 2)

Cr41 (4) -9.75 0 06 -9.7E O -3.2R 1 (0) ( -1. 4 - -0. 6) E 1 ( -1. 4 - -0. 6) E 1 ( -6. 3 - 1. 9) E 1 (0/ 2) (0/ 2) (0/ 2)

Mn44 (4) 2.1E -1 66 2.7E o 2.7E 0 (0) ( -2.4 - 2. 9) E O ( 1.1 - 4.4)E O ( 1.1 - 4.4)E O (0/ 2) (0/ 2) (0/ 2)

Co47 (4) 1.1E -1 06 1.1E -1 -1.2E O (0) ( -2.7 - 2.9)E O ( -2.7 - 2.933 0 ( -3.2 - 0. 9) E O i

L (0/ 2) (0/ 2) (0/ 2) i Co48 (4) -4.75 0 66 4.75 0 4.7E O (0) ( -6.0 - -3.5)E o ( 2.5 - 6.9)E D ( 2.5 - 6. 9)E O l (0/ 2) (0/ 2) (0/ 2)

Fe49 (4) 1.4E 1 06 1.4E 1 4.4E o (0) ( -2.7 - 30.3)E D ( -2.7 - 30.3) E O ( 3.1 - 5.8) E O I (0/ 2) (0/ 2) (0/ 2)

Co40 (4) -1.7E 1 66 -6.13 0 -6.1E O (0) ( -2.4 - -1.0)E 1 ( -1.2 - 0.0)E 1 ( -1.2 - 0.0)E 1 (0/ 2) (0/ 2) (0/ 2)

Zn46 (4) -5.72 0 66 7.0E O ?.0E O (0) ( -2. s - 1.7) E 1 ( 2.2 - 11.s)E O ( 2.2 - 11.e)E D (0/ 2) (0/ 2) (0/ 2)

Se-76 (4) 1.2E O 86 1.sE o 1.sE D (0) ( ~6.4 - 30.1)E -1 ( 1.1 - 2.4)E O ( 1.1 - 2.4)E O l

l (0/ 2) (0/ 2) (0/ 2)

Zr48 (4) -6.4E 0 06 -6.4E O -7.*E O (0) ( -2.4 - 1.1)E 1 ( -2. 4 - 1.1) E 1 ( -8.0 - -7.1) E 0 (0/ 2) (0/ 2) (0/ 2)

Ru.103 (4) 5.3E O 06 5.3E O 4.0E O (0) ( 2.1 - B.4)E o ( 2.1 - e.4)E D ( -2. 8 - 10. 8) E D (0/ 2) (0/ 2) (0/ 2) f4 Ru.106 (4) -1.e5 1 66 2.5E 1 2.5E 1 (0) , ( -2.3 - -1.2)E 1 ( -6. 5 - 11. 6) E 1 ( -6. 5 - 11. 6) E 1 (0/ 2) (0/ 2) (0/ 2)

-_ . - _ _ . _ ~ . - - - _ . . . . . - - _ _ . - - _ . ~ - . . . . ... - . - - - - .

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Radiological Environmental Program Summary Seabrook Nuclear Power Station. Seabrook. NH (January . December 1996)

MEDIUM: Irish Moss (AL) UNITS: pCi/kg Indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Sta. Mean Mean (No. Anatyees) Required Range Range Range (Non-Routine *) LLD (No. Detected") (No. Detecter *) (No. Detected **)

Ag-110M (4) 5.65 0 66 7.3E O 7.3E D (0) ( 1. 6 - 9.7) E O ( 3. 8 - 10. 8) E O ( 3.8 - 10.8)E O (0/ 2) (0/ 2) (0/ 2)

Sb-124 (4) 2.9E O $6 7.0E O 7.0E O (0) ( -3.4 - 9.2)E O ( 6.7 - 7.3)E O ( 6.7 - 7.3) E O I

(0/ 2) (0/ 2) (0/ 2) j l 1131 (4) -4.3E 0 66 1.35 1 l

1.3E 1 (0) ( -4.6 - -4.0)E O ( 1.1 - 1.5)E 1 ( 1.1 - 1.5)g. .

j (0/ 2) (0/ 2) (0/ 2) ,

Cs-134 (4) 7.5E O 06 7.5E O -3.1E O (0) ( 4.2 - 10.7) E O ( 4. 2 - 10. 7) E O ( -1. 6 - 2. 0) E 1 (0/ 2) (0/ 2) (0/ 2)

Cs-137 (4) 3.3E O 66 8.3E o 8.1E o l (0) ( -2,1 - 68. 6) E -1 ( 8.1 - 8.5) E O ( P.1 - 8.5)E O i

(0/ 2) (0/ 2) (0/ 2)

Be-140 (4) 1.1E O 06 1.1E o 7.6E -1 (0) ( 0.0 - 21660.0)E -4 ( o.0 - 21660.0)E -4 ( -2.3 - 3.8)E O (0/ 2) (0/ 2) (0/ 2) l Ce-141 (4) -4.6E O 66 9.6E -1 9.6E -1 I

(0) ( -1. 7 - 0. 8) E 1 ( -1. 8 - 3. 7) E 0 ( -1.8 - 3. 7) E O (0/ 2) (0/ 2) (0/ 2)

Co-144 (4) -3.43 1 66 -1.1E 1 -1.1E 1 (0) ( -3.6 - -3.2)E 1 ( -4.6 - 2.4)E 1 ( -4.6 - 2.4)E 1 (0/ 2) (0/ 2) (0/ 2)

Th-232 (4) 2.3E 1 06 2.3E 1 9.7E O (0) ( 2.1 - 2. 6) E 1 ( 2.1 - 2. 6) E 1 ( -2.4 - 4.3)E 1 (0/ 2) (0/ 2) (0/ 2)

Non-Routine refers to those radionuclides that exceeded the Reporting Levels in ODCM Table A.5-3.

" The fraction of sample anaff ees ywiding detectable measurements (i.e. 33 standard deviabons) is shown in parentheses.

K) Food Crop There is no requirement for food crop samples as long as the required milk locations are available. Samples are collected from three locations in the growing season . A ganna analysis is performed on each ,

sample.

The only radionuclide detected in 1996 was naturally occurring K-40.

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Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook. NH (January . December 1996)

MEDIUM: Food Crop (TF) UNITS: pCilkg Indicator Stations Station With Highest Mean Control Stations

Radionuclides Mean Sta. Mean Mean l (No. Analyses) Required hange Range Range s l (Non-Routine *) LLD (No. Detected")

(No. Detected **) (NO. Detected")

Be.7 (10) 2.1x 1 03 e.5E 1 7.es 1 (0) ( -7.0 - 12.2)E 1 ( 3.1 - 12.2)E 1 ( 4.0 - 10.2)E 1 (0/ 7) (0/ 3) (0/ 3)

K.40 (10) 1.9E 3 02 2.0E 3 1.7E 3 (0) ( 1.4 - 2.5)E 3 ( 1.4 - 2.5)E 3 ( 1. 4 - 1. 9) E 3 (7/ 7) (3/ 3) (3/ 3)

Cr41 (10) 4.0E 1 03 1.0E 2 -7.11 0

( -1.1 - 24.0)E 1 (0) ( * .1 - 24.0)E 1 ( -6.5 - 6.3)E 1 (0/ 7) (0/ 3) (0/ 3)

Mn44 (10) -3.1E 0 06 2.9E O 2.,9E O (0) ( -e.7 - 1.4)E o ( -5.4 - 9.5)E o ( -5.4 - 9.5)E O (0/ 7) (0/ 3) (0/ 3)

Co47 (10) -1.0E o 02 -4.6E -1 -9.9E -1 l (0) ( -4.0 - 1.6)E o ( -4.0 - 1. 6) E O ( -e.3 - 3. 6)E O (0/ 7) (0/ 3) (0/ 3) i Co48 (10) -7.2E -1 03 3.65 0 -6.25 0 (0) ( -5.7 - 12.4)E D ( -1. 6 - 12. 4) E O ( -1.2 - -0. 3) E 1 ;

(0/ 7) (0/ 3) (0/ 3)

Fe49 (10) 5.4E O 02 1.2E 1 9.2E 0 !

(0) ( -2.0 - 2.9) E 1 ( -1.9 - 2.9)E 1 ( -5. 6 - 19 e) E O '

(0/ 7) (0/ 3) (0/ 3) !

Co40 (10) 3.9E o 03 1.2E 1 -7.4R -1 i

(0) ( -6.4 - 24.7) E O ( 5.5 - 24.7)E o ( -e.9 - 6.6)E O (0/ 7) (0/ 3) (0/ 3)

Zn46 (10) -1.1E 1 06 1.6E -1 1.63 -1 (0) ( -3.5 - 2.0)E 1 ( -2.2 - 4.0)E 1 ( -2.2 - 4.0)E 1 (0/ 7) (0/ 3) (0/ 3)

Se-76 (10) 2.eE O 01 1.2E 1 -9.9E O (0) ( -7.3 - 16.0)E o ( -2.3 - 0.0)E 1 (0/ 7) (0/ 1) (0/ 3)

Zr48 (10) 1.1E 1 01 1.7E 1 5.2E O (0) ( -2.0 - 2.3)E 1 ( -6.5 - 26.6)E O (0/ 7) (0/ 1) (0/ 3)

Ru.103 (10) 1.6E o 02 5.9E O 3.eE -2 (0) ( -7.6 - 9.7)E O ( 1.6 - e.4)E O ( -1. 6 - 0. 9) E 1 4 (0/ 7) (0/ 3) (0/ 3)

Ru.106 (10) -4.e5 0 06 7.es 1 7.et 1 (0) - ( -9. 6 - 7.5) E 1 ( 6.0 - 10.e)E 1 ( 6.0 - 10.e>E 1 (0/ 7) (0/ 3) (0/ 3)

Radiological Environmental Program Summary Seabrook Nuclear Power Station, Seabrook. NH (January . December 1998)

MEDIUM: Food Crop (TF) UNITS: pCWkg indicator Stations Station With Highest Mean Control Stations Radionuclides Mean Sta. Mean Mean (No. Anah/ses) Required Range Range Range (Non-Routine *) LLD (No. Detected **) (No. Detecter *) (No. Detecter *)

Ag.110M (10) 7.7E o 03 1.1E 1 3.0E o (0) ( 4.0 - 279.1)E -1 ( 1.3 - 27. 9)E D ( 1.3 - 5.0)E O (0/ 7) (0/ 3) (o/ 3)

Sb.124 (10) 2.6E -1 01 5.4E o -1.3E i (0) ( -1.5 - 2.1) E 1 ( -3.0 - 1.s)E i (0/ 7) (0/ 1) (o/ 3) 1131 (10) so -1.4E o 7.4E o 03 -6.5E O (0) ( -2.4 - 3.8)E 1 ( -2.4 - 3.8)E 1 ( -2.4 - 0.9) E 1 (0/ 7) (0/ 3) (0/ 3)

Cs.134 (10) 60 -1.1E o 02 1.5E O -4.2E O (0) ( -6.6 - 7.0)E O ( -1.7 - 7.0)E O ( -8.1 - 3.5)E O (0/ 7) (o/ 3) (0/ 3)

Cs.137 (10) so 1.9E o 02 5.25 0 1.2E D (0) ( -1.1 - 1. 5) E 1 ( -4.1 - 15.0) E D ( -4.4 - 11.4)E O i (0/ 7) (0/ 3) (0/ 3)

Ba-140 (10) -1.05 1 08 1.3E 1 1.3E 1 (0) ( -2.9 - -0.1)E 1 ( -2.0 - 3.2)E 1 ( -2.0 - 3.2)E 1 (0/ 7) (0/ 3) (0/ 3) i Ca.141 (10) 2.3E o 02 3.2E o 3.0E O 1 (0) ( -1. s - 1. 8) E 1 ( -3.6 - e.2)E o ( -e.1 - 9,4)E O (0/ 7) (0/ 3) (0/ 3)

Co-144 (10) -2.0E 1 01 1.6E 1 -3.sz O (0) ( ~4. 6 - 1. 6) E 1 ( -4.3 - 3.9) E 1 (0/ 7) (0/ 1) (0/ 3) l Th.232 (10) 1.5E 1 03 3.35 1 1.3E o (0) ( -2.1 - 6.4)E 1 ( 7.5 - 64.2)E o ( -5.0 3.8)E 1 (0/ 7) (0/ 3) (0/ 3)

Non-Routine refers to those radionuclides that exceeded the Reportrg Levels in ODCM Tobie A.5-3.

- The frac::on of sample analyses yielding detectable rnessurements (i.e >3 standard devlstions)is shown in parentheses

)

_ _ ____ - ____.___m.-_____ .~. . _ _ _ . . __ _____ ____

3 L) Direct Radiation !

Direct gamma radiation exposure was measured with thermoluminescent i dosimeters (TLDs). Two TLDs badges are placed at each of the monitoring l stations (Each TLD badge has 3 CaSO 4 :tn elements) . A total of forty !

seven stations are located offsite, forty of which are required. All badges were collected and readout on a quarterly schedule. All exposure rates were normalized to a 91-day quarter. A summary of the data is shown in Table 3.1. Indicator location results are statistically identical to control locations. j t

TLD badge #12, located in the WSW sector at the site boundary experienced an annual mean of 18.3 mrem which is approximately 20%

greater then the preoperational mean. This increase was do to excavation in the immediate area and the relocation of badge #12.

During the second quarter of 1995, extensive excavation was performed to l move the perimeter fence to accommodate the Town of Seabrook. A new l town solid waste sorting and transfer station was constructed in the area immediately adjacent to TLD badge #12. The 1995 third quarter I reading for badge #12 indicated that there was a shift in the natural j area background. In the Third quarter of 1995, TLD badge #12 was l relocated (on the new fence) approximately 25-30 feet from and )

i i approximately 5-6 feet lower to the ground then the original placement.

The 1995 fourth quarter results for badge #12 were not available due to l water danage, therefore the 1995 annual mean only reflected one quarter 1 at the new location. The 1996 data reflects the new location of badge

12 and the earth excavation that occurred. Accordingly, this shift in quarterly exposure appears not to be from plant operations.

l All other results are consistent with previous preoperational and operational data.

' The Yankee Atomic Environmental Laboratory (YAEL), beginning with the first quarter of 1995, has been contracted to provide the TLD processing services for Seabrook Station's direct radiation program. The YAEL is continuing to utilize all original Panasonic elements for Seabrook i Station's environmental TLD badges.

In the second quarter of 1996 their were two TLD badges that were reported missing. In the fourth quarter, one badge was reported missing and two badges were damaged by water intrusion. The damaged badges were

! found with the phosphors immersed in water. This water intrusion caused i anomalous phosphor readings at read out. The water damage was caused by I extraordinarily wet and windy weather that struck the New Hampshire seacoast in November of 1996. The Seacoast of New Hampshire experienced

a '100 years rain storm'. This damage was done in spite of modifications that were made to the badge holders following occasional l

! water damage from the previous year.

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l Table 3.1 ENVIRONMENTAL TLD MEASUREMENTS Net Exposure in mR/ Standard Quarter (91 days) 1996 i

STA. DESCRIPTION 1ST QUARTER 2ND QUARTER 3RD QUARTER 4TH QUARTER ANNUAL NO. EXP. S.D. EXP. S.D. EXP. S.D. S.D.

l EXP. MEAN EXP

]

TL-01 Brimmer's Lane 13.5 2 0.7 17.0 2 0.9 16.4 2 0.5 14.6 2 0.6 15.4 TL-02 Landing Road 12.9 2 0.7 14.9 1 0.8 13.8 2 0.6 12.8 t 0.5 13.6 TL-03 Glade Path 15.7 2 1.8 16.4 2 0.6 15.6 2 0.6 l

15.0 2 1.2 15.7 TL-04 Island Path 13.8 2 0.7 16.3 2 0.8 15.8 2 0.7 14.4 2 0.7 15.1 TL-05 Harbor Road 13.6 t 0.7 16.2 2 0.8 15.5 2 0.3 13.9 2 0.8 14.8 TL-06 Barge Landing 12.7 2 0.6 15.3 t 0.7 14.4 2 0.8 13.4 2 0.6 14.0 TL-07 Cross Road 11.8 i 0.8 14.4 2 0.9 12.7 2 0.6 12.1 2 0.6, 12.8 TL-08 Farm Lane 14.1 1 1.0 16.9 2 0.9 15.3 2 0.4 14.7

1.2 15.3 TL-09 Farm Lane 14.9 2 1.2 17.720.9 16.5 0.8 15.2 2 1.0 16.1 TL-10 Site Boundary 15.3 2 0.7 18.5 2 0.8 16.9 2 0.8 16.6 1.0 16.8 TL-11 Site Boundary 12.2 2 0.7 15.7 2 0.8 14.7

0.5 13.6 2 0.7 14.1 TL-12 Site Boundary 17.2 1.2 20.2 t 1.0 18.0 t 0.6 17.9 0.8 18.3 TL-13 Inside Site Boundary 17.6 2 1.0 20.0 1.0 19.5 2 0.6 18.3 2 0.8 18.9 1

l TL-14 Trailer Park 14.7 2 0.8 17.4 2 0.9 16.2 2 0.5 14.3 0.9 15.7 )

TL-15 Brimmer's Lane 13.5 2 0.8 16.9 0.7 16.2 2 0.6 (2) 15.5 l TL-16 Brimmer's Lane 12.8 s 0.9 15.3 0.7 14.3 2 0.3 12.5 2 0.6 13.7 I TL-17 South Road 13.5 t 0.8 17.1 2 0.9 16.2 2 0.4 14.8 2 0.7 15.4 !

TL-18 Mill Road 11.8 0.9 15.6 2 0.7 15.2 2 0.8 13.3 2 0.7 14.0 1

TL-19 Appledore Avenue 13.4 2 0.7 15.9

0.6 14.7 1 0.6 (1) 14.7 TL-20 Ashworth Avenue 15.3 2 0.8 18.5 t 0.7 18.0 2 0.6 16.8 t 0.8 17.2 TL-21 Route 1A 13.0 t 0.8 16.5 2 0.6 15.4 0.4 14.7 t 0.7 14.9 i TL-22 Cable Avenue 13.7 2 0.8 17.420.8 15.7 2 0.6 15.2 2 0.7 15.5 TL-23 Ferry Road 13.7 1 0.8 16.9 2 0.6 15.4 2 0.6 14.6 2 0.7 15.2 TL-24 Ferry Lots Lane 13.9 2 0.8 16.8 0.7 15.5 2 0.6 14.4 2 0.8 15.2 TL-25 Elm Street 16.4 e 1.0 (1) 16.3

0.7 16.3 2 1.2 16.3 TL-26 Route 107A 14.3 2 0.8 18.3 2 0.8 16.8

0.6 16.3 2 0.6 16.4 TL-27 Highland Street 14.6 2 0.9 17.4 2 0.7 16.1 0.6 15.2 2 0.8 15.8 TL-28 Route 150 13.4 2 1.0 16.9 2 0.7 16.7 s 0.5 15.5 2 0.6 15.6 TL-29 Frying Pan Lane 15.3

1.0 17.9 0.6 16.6 2 0.6 16.0 2 1.2 16.5 TL-30 Route 150 12.2 2 0.7 16.3 2 0.8 16.2 2 0.5 14.9 2 0.7 14.9 l TL-31 Alumni Drive 11.7 2 0.8 15.7

0.7 15.2 t 0.5 14.2 2 1.2 14.2 TL 32 SB Elementary School 12.5 2 0.8 (1) 17.2 t 0.7 17.0 2 0.8 15.6 i

1 58

-. - _ - . . _ __=_ _ .._ . ___ _ _. __ ____ _ .._ _ __._.._ _.~.__.._.m._. _m .m-- _ __ _ _

Table 3.1 '

ENVIRONMENTAL TLD MEASUREMENTS ;

Net Exposure in ne/ Standard Quarter (91 days) :

1996 '

STA. DESCRIPTION 1ST QUARTER 2ND QUARTER 3RD QUARTER 4TH QUARTER ANNUAL NO. EXP. S.D. EXP. S.D. EXP. S.D. EXP. S.D. MEAN EXP TL-33 Dock Area 17.0 t 0.8 19.7 0.9 18.3 2 0.6 18.0 0.8 18.3 TL 34 Bow Street 17.9 t 1.1 19.4 t 1.1 19.3 2 0.6 18.2 2 1.0 18.7 I TL-35 Lincoln Ack. School 15.5 2 0.9 18.0 2 0.6 18.5 t 0.7 17.1 0.8 17.3 !

i l

TL-36 Route 97 (Control) 16.1

0.9 17.0 0.6 16.6 2 0.5 (2) 16.6 TL 37 Plaistow, NH (Control) 15.4 0.9 16.9 2 0.7 17.3 2 0.7 15.3 2 0.9 16.2 TL-38 Hampstead, NH (control) 12.6 2 0.7 16.5 t 0.6 16.9

0.5 16.1 2 0.7 15.5 TL 39 Fremont, NH (Control) 15.6 2 0.7 19.0 2 0.7 19.5 t 2.7 18.0 0.8 18.0 l TL-40 Newmarket, NH (Control) 13.3 2 1.1 15.2

0.5 16.1 2 0.9 14.1 t 0.7 14.7 '

TL-41 Portsmouth, NH Control) 14.6 2 0.6 15.7 2 0.9 15.5 t 0.~ 13.8

0.7 14.9 TL-42 Ipswich, MA (Control) 12.4 2 0.7 14.8

0.6 14.0 2 0.5 13.0

0.6 13.6 TL 43 Rocks Road Landing 13.4 2 0.9 14.7 0.5 14.2 2 0.8 12.7 2 0.6 13.8 l

l l TL-44 $8 Education Center 13.5 1.1 15.5 2 0.9 15.1

0.5 13.7 2 0.7 14.5 TL-45 Hanpton Fire Station 14.8 e 1.1 16.5 2 0.8 16.7 t 0.8 15.2

1.0 15.8 TL-46 SB Beach Police Station 14.2 2 0.7 16.9 2 0.7 17.1 2 0.8 15.1 2 0.7 15.3 l TL-47 Hampton Falls, Rt. 84 14.4 2 0.8 16.3 2 0.6 16.6

0.6 13.9

0.8 15.3 Mean of Indicators 14.1 16.9 16.1 15.1 15.6 Mean of Controls 14.3 16.4 16.6 15.1 15.6 NOTES:

(1)TLD missing.

(2)TLD damaged.

I i'

59

l I

FIGURE 3.6 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 l -

l 3 0 -- -30 4

u -

20- -20 4 _

o -

D. -

~

3 ~

j -

_ 1 10- -10 0 , , , , , , , ,

0 Jan Apr Jul Oct Jan Retrieval Date (1996)

-gy- TL-01 Brimmer's Lane

--o- TL-02 Landing Road A TL-03 Glade Path o TL-04 Island Path

+ TL-05 Harbor Road 1

0 60.

l 1

l i,

i FIGURE 3.6.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 t

~

i 30-. -30 u

l to ~

1 0 l # 20- -20 Ii 10-ap U -10 0 ,

,,,,,,, ,,0 1984 1986 1988 1990 1992 1994 1996 1998 g TL-01 Brimmer's Lane

-e-- TL-02 Landing Road i, TL-03 Glade Path l t TL-04 Island Path

--v- TL-05 Harbor Road b

61.

1 FIGURE 3.7 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 30- -30 t -

ca -

J

20- -20 u _

7

-W m o -

v

-o 10- -10 0 , , , , , , , , , , O Jan Apr Jul Oct Jan Retrieval Date (1996)

-t3- TL-06 Barge Landing

--o-- TL-07 Cross Road A TL-08 Farm Lane v TL-09 Farm Lane

-y- TL-10 Site Boundary I

l k

62.

FIGURE 3.7.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 t

~

I i

30- -30 l u <

e

. v - -

! 4

<a . -

20- -20 u ~

g A

~

. y#

N -

o oeo o i 10- -10 l

0 .

i

. 0 1984 1986 1988 1990 1992 1994 1996 1998 i

-g- TL-06 Barge Landing

-o- TL-07 Cross Road

- e TL-08 Farm Lane y TL-09 Farm Lane l -y- TL-10 Site Boundary 63.

FIGURE 3.8 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 30- -30 U -

<a 20- -

~ -20 W

o 4

10- -10 O , ,

, , , , , , , O Jan Apr Jul Oct Jan i Retrieval Date (1996) l I

c TL-ll Site Boundary l

9 TL-12 Site Boundary e TL-13 Inside Site Boundary c TL-14 Trailer Park

--v- TL-15 Brinimer's Lane j 1

64.

l

j l

l FIGURE 3.8.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs) l SEABROOK STATION l

l l

I 40 40 1 .

30- -30 l u e

o t3 spys < .

e 1

10- -10 W

l 1

0 ,

, ,,,,,,,,,0 1984 1.986 1988 1990 1992 1994 1996 1998

-e- TL-11 Site Boundary

-o- TL-12 Site Boundary A TL-13 Inside Site Boundary c TL-14 Trailer Park

--v-- TL-15 Brimmer's Lane l I

65.

1

FIGURE 3.9 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 4

30- -30 1 .

e . .

t . .

to S 20- -- 2 0 u ~

~

g ~

_ A %

10- -10 1 .

0 , , , , ,

O Jan Apr Jul Oct Jan Retrieval Date (1996) c TL-16 Brimmer's Lane

--e- TL-17 South Road A TL-18 Mill Road v TL-19 Appledore Avenue

+ TL-20 Ashworth Ave.nue

)

66.

i FIGURE 3.9.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION !

l

40 ao l

~

I 30- -30 u

o

.o u -

re u

20-

. -20 4 4 e

De .

h . [ ,e .

ts' B 10- _10 j I

~

I

\ -

0 ,

, , o 1984 1986 1988 1990 1992 1994 1996 1998

-t3-- TL-16 Brirraner's Lane

--o-- TL-17 South Road 1

e TL-18 Mill Road y TL-19 Appledore Avenue

-t- TL-20 Ashworth Avenue 3

67.

i

I l

FIGURE 3.10 i ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION !

l 40 40

)

30- -30 U -

m -

s

20- -20 4 _

S _h_

o. v -- - -_

g

. u 10- -10 M

0 , ,

0 Jan Apr Jul Oct Jan Retrieval Date (1996)

--g- TL-21 Route 1A

-e- TL-22 Cable Avenue 4 TL-23 Ferry Road o TL-24 Ferry Lots Lane

+ TL-25 Elm Street 4

68.

FIGURE 3.10.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 30- -30 t:a -

b .20- f

-20

-g g/ 'v. v

.~

10- -10 0 ,

, , 0 1984 1986 1988 1990 1992 1994 1996 1998

--t3- TL-21 Route 1A

-ty- TL-22 Cable Avenue 4 TL-23 Ferry Road o TL-24 Ferry Lots Lane

-y-- TL-25 Elm Street 4

69.

1 l

l FIGURE 3.11 l I

ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs) l SEABROOK STATION i l

40 40 30- -30 N -

so 20- -20 u .

k -

~

' C. w__ gm !

1 l

10- -10 l 0 , ,

O Jan Apr Jul Oct Jan Retrieval Date (1996)

--c- TL-26 Route 107A

+ TL-27 Highland street A TL-28 Route 150

- o-- TL-29 Frying Pan Lane

-y- TL-30 Route 150 70.

l I

FIGURE 3.11.1 l ENVIRONMENTAL RADIATION MEAWIREMENTS (USING TLDs)

SEABROOK STATION !

l 40 40 i 30- -30 I, 4 _

2 0 -- -20 l y V V 10- -10 j -

0 ,

, 0 1984 1986 1988 1990 1992 1994 1996 1998 1

4

-ty- TL-26 Route 107A

--e- TL-27 Highland Street i

A TL-28 Route 150 c TL-29 Frying Pan Lane

--v-- TL-3 0 Route 150 71.

FIGURE 3.12 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 30- -30 to S 20- . . -20 ta -

(? - f,

e U

^

g _

w 10- -10 0 , , , , , , , , , , , ,

O Jan Apr Jul Oct Jan Retrieval Date (1996)

-e- TL-31 Alumni Drive

-o- TL-32 SB Elementary School e TL-33 Dock Area v TL-34 Bow Street

-y- TL-35 Lincoln Ackerman School 0

72.

i I

t 1

1 i FIGURE 3.12.1

{'

ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 100 100 90- -90

+

80- -80 l

70- -70

N -

g t 60- -60 m

o

50- -50 N ~

0 A 40.- -40 _

g .

30- -30

~

I D

l O , ,

, 0 1984 1986 1988 1990 1992 1994 1996 1998 i

a TL-31 Alumni Drive

--o-- TL-32 SB Elementary School e TL-33 Dock Area v TL-34 Bow Street

- TL-35 Lincoln Ackerman School

)

73.

FIGURE 3.13 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs) t SEABROOK STATION t

40 40 30- -30

~

L o -

as 0

20- -

-20 A -

X_ - - -'

10- -10

~

l i

1 0 , ,

0 Jan Apr Jul Oct Jan Retrieval Date (1996)

-o- TL-36 Route 97 (Control)

+ TL-37 Plaistow, NH (Control) I A TL-38 Hampstead, NH (Control) c, TL-39 Fremont, NH (Control)

--y - TL-40 Newmarket, NH (Control)

)

74.

I

}.

)

i FIGURE 3.13.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 30- -30 L '

j _

t -

d 20- . -20 Jsf

~

10- -10 1

0- ,

, , 0 1984 1986 1988 1990 1992 1994 1996 1998 I

l l

c TL-36 Route 97 (Control)

I

-e- TL-37 Plaistow, NH (Control)

A TL-38 Hampstead NH (Control)

%- TL-39 Fremont, NH (Control)

-y- TL-40 Newmarket, NH (Control) 75.

. ._J

1 FIGURE 3.14 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 1

J 40 40 i 30- -30 )

u I a) -

a u -

m a -

20- -20 l u - .

0 x q

10- -10 O , ,

, , , , , O Jan Apr Jul Oct Jan Retrieval Date (1996) l

--$3- TL-41 Portsmouth, NH (Control)

--e-- TL-42 Ipswich, MA (Control) 3 TL-43 Rocks Road Landing c TL-44 SB Education Center l

+ TL-45 Hampton Fire Station !

x TL-46 SB Beach Police Station a TL-47 Hampton Falls, Route 84

)

76.

l

l I

FICIRE 3.14.1 ENVIRONMENTAL RADIATION MEASUREMENTS (USING TLDs)

SEABROOK STATION 40 40 ,

30- -30 M

20- -20 10- -10 0 ,

, , 0 1984 1986 1988 1990 1992 1994 1996 1998 l

--e- TL-41 Portsmouth, NH (Control)

--o- TL-42 Ipswich, MA (Control) l l 4 TL-43 Rocks Road Landing o TL-44 SB Education Center

--v- TL-45 Hampton Fire Station

-y. TL-46 SB Beach Police Station i

g TL-47 Hampton Falls, Route 84 77.

I

.- . - - . - - ~ - - - - - _ - - . - - . - . - . _ . . - ~ _ - - - - - -

4.0 Quality Aggurance Program ;

The quality assurance program at the Yankee Atomic Environmental l Laboratory is designed to serve two overall purposes: 1) Establish a i level of confidence in the measurement process to assure the licensee, !

regulatory agencies ar.d the public that analytical results are accurate !

and precise; and 2) Identify deficiencies in the sampling or the

measurement process to those responsible for these operations so that ,

corrective actions can be taken. Quality assurance is applied to all steps of the measurement process, including the collection, reduction, '

evaluation and the reporting of data, as well as the record keeping of ;

the final results. Quality control, as part of the quality assurance i program, provides a means to control and measure the characteristics of measurement equipment and processes, relative to established ;

requirements. ,

The YAEL enploys a comprehensive program to monitor the quality of lj analytical processing to ensure reliable environmental monitoring data.

The program includes the use of approved and controlled procedures for !

all work activities, a nonconformance and corrective action tracking l program, systematic internal audits, audits by external groups, a i laboratcry quality control program, and a staff training and retraining program. Monitoring programs include the Intralaboratory Quality l Control Program administered by the Laboratory QA officer (used in conjunction with National Institute Standards and Technology's i Measurement Assurance Program, NIST MAP) and the third party l interlaboratory programs administered by the US EPA and Analytics, Inc.

l Together these programs are targeted to supply QC\QA sources at 5% of l the routine sample analysis load. In addition the Laboratory Quality Control Audit Committee conducts a blind duplicate quality assurance program.

F.nvironmental'TLD Program The Panasonic environmental dosimeters are processed by the YAEL, which

is a National Voluntary Laboratory Accreditation Program (NVLAP) l l certified laboratory. The NVLAP is conducted through the Battelle l I Pacific Northwest Laboratories. The YAEL environmental TLD program has its own quality assurance program, through the Laboratory Quality Assurance Officer, as well as the NVLAP program. Under these programs, dosimeters are irradiated to ANSI specified testing criteria and submitted for processing to the Dosimetry Services Group as " unknowns".

The bias and precision of TLD processing is measured against this standard and is used to indicate trends and changes in performance.

Instrument checks, although routinely performed by the Dosimetry Services Group and representing between 5-10% of the TLD's processed, are not part of this report because they do not represent a true process check sample since the doses are known.

The YAEL processed 3232 environmental TLD's in 1996. Ninety six independent performance tests were conducted. Of these, 72 were submitted to the Dosimetry QA Officer and 24 were submitted to the Datelle Pacific Northwest Laboratories testing program. All (100%), met the acceptance criteria for accuracy and precision with an average bias during the first half of 1996 of 0.7 +/- 2.6 and -3.8 +/- 5.0 for the second half of 1996, i

l Intralaboratory QC Program ]

i I l YAEL conducts an extensive intralaboratory quality control program to

' assure the validity and reliability of the data. This program includes quality control of laboratory equipment, use of reference standards for calibration, and analysis of blank and spiked samples. Process check samples are either samples submitted in duplicate to evaluate the i 78 !

I

. .- - . . _ . -_--_. . . . . . . . - . . - - - - - . - . . . - - - - - - - - - - - ~ .-

)

precision or the measurement or spiked with a known quantity of radioactive material to assess the bias in the measurement. The records ;

of the quality control program are reviewed by the Laboratory QA ;

Officer, and corrective measures are taken whenever applicable. A l summary of the program process check results are found in Table 4.1. j Third Party Intercomparison Program The YAEL also participates in two independent third party intercomparizon prograns. At the end of 1995, the US EPA ended its Environmental Intercomparison Studies Program. To replace this mix of radionuclides and matrices, the YAEL now participates in two third party programs; the US EPA Performance Evaluation Study for radionuclides in water and the Analytics Inc.'s Environmental Cross Check Program for radionuclides in milk, water and on air filters.

Each sample supplied by the EPA or Analytics is analyzed in triplicate and the results are returned to the EPA or Analytics within a specified time frame. When the known values are returned to the Laboratory, the results are evaluated against specific Laboratory acceptance criteria and the EPA results are evaluated against EPA control limits. When results of the cross check analysis fall outside of the acceptance criteria or control limit, an investigation is initiated to determine the cause and, if appropriate, corrective measures are taken.

l l

Intralaboratory and EPA Interlaboratory Results l

The Quality Assurance Program implemented at the analytical laboratory indicated good precision and accuracy in reported values. Table 4.1 shows the results of accuracy and precision for laboratory analyses in 1996 for intralaboratory analyses and EPA interlaboratory cross-check analyses.

The results of the EPA Interlaboratory Comparison Program (Table 4.2),

when considered apart from the remainder of the Quality Assurance Program, were satisfactory with respect to accuracy and precision. Two sets of results for 1995 have not yet been received from the EPA, and j consequently not included in this report. As indicated in Table 4.3, ;

111 analyses were evaluated for bias and a similar number for precision. l All were performed on air particulate filters, milk, and water samples. ;

Three mean values did not fall within the EPA control lindts. These are: .

l Pu-239 in Water (Ref. date 3/17/95) i Gross Alpha in Water -2 (Ref dates 7/21 & 10/27-95)

An internal investigation was conducted that included the reprocessing of the original Pu-239 water sample in triplicate. The reprocessed results were within the EPA control limits. It should be noted that Pu-239 analyses in environmental water samples is not required for Seabrook Station's REMP. The EPA in October of 1995, issued a note that stated j that there was a built in bias for both July and October Gross Alpha-Beta in water samples. Based on the EPA information and the follow-up YAEL investigation, no further follow-up is warranted at this time.

i The above Interlaboratory Ccmparison Program results are provided in compliance with Technical Specification 4.12.3.

a 79

. . - . _ - - . . - - - . - . - - -~ _-.- __ .- - - . - - .

Clind Dupliette Quelity asnurence Program The Laboratory Quality Assurance Audit committee (LQCAC) is comprised of one member from each sponsor company that are serviced by the Yankee Atom.ic Environmental Laboratory. Two of the primary functions of the LQCAC are to conduct an annual audit of laboratory operations and to coordinate the Blind Duplicate Quality Assutance Program. Under the Blind Duplicate Quality Assurance Program, paired samples are submitted from the five plants, including the Seabrook Nuclear Power Station.

They are prepared from homogeneous environmental media from each respective plant, and are sent to the Laboratory for analysis. The samples are ' blind' in that the identification of the matching sample is not identified to the Laboratory. The LQCAC analyzes the results of the paired analyses to evaluate precision in laboratory measurements.

A total of 45 paired samples (Table 4.4) were submitted by the five YAEL sponsor company plants for analysis during 1996. The data base used for the duplicate ar.alysis consisted of paired measurements of 26 gamma-emitting nuclides, H-3, Sr-89, Sr-90, I-131 and gross beta. All measurements were evaluated, whether the results were considered statistically positive or not, and whether the net concentration was positive or negative. Of the 1283 paired duplicate measurements evaluated in 1995, 1273 (99.2%) fell within the established acceptance criteria. Only one of the ten measurements falling outside the acceptance is considered to have statistically positive gross beta activity and is being addressed by the Laboratory as corrective action YLCAR IG07-97. The total number of samples submitted for this program are listed in Table 4.4.

80

l TABLE 4.1

SUMMARY

OF PROCESS CONTROL ANALYSES RESULTS l JANUARY-DECEMBER 1996 l

l ACCURACY PRECISION l NUMBER OF NUMBER OF

( NUMBER OF ANALYSES NUMBER OF ANALYSES OUTSIDE l SAMPLE MEDIA ANALYSIS OUTSIDE OF ANALYSES ACCEPTANCE t

ACCEPTANCE CRITERIA CRITERIA AIR CHARCOAL GAMMA 50 0 0 0 AIR FII.TER BETA 101 0 0 0 GAMMA 0 0 3 0 0 0 0 0 STRONTIUM MILK GAMMA 36 1 36 0 1

IODINE 18 1 18 0 l 0 0 0 0 1

STRONTIUM l WATER

( GROSS ALPHA 3 1 3 1 l

! GAMMA 0 0 0 0 GROSS BETA 6 0 6 0 0 0 0 0 STRONTIUM TRITIt'M 0 0 0 0 SOIL / SEDIMENT

! GAMMA 0 0 24 0 1

l TOTAL 214 3 87 1 l

l l

l j 81

i TABLE 4.2

SUMMARY

OF EPA INTERCOMPARISON RESULTS JANUARY - DECEMBER 1996 EPA

YAEL CONTROL EPA REF. SAMPLE TYPE NUCLIDE MEAN LIMITS DATE (pCi/1) (pCi/1) f 10-17-95 WATER Co-60 47.36 40.3-57.07

Cs-134 36.96 31.3 - 48.7

f. Cs-137 29.86 21.3 - 38.7 Nat U 26.5 21.8 - 32.2 Ra-226 26 18.4-31.2 Ra-228 21.1 11.7-29.7

Sr-89 22.53 11.3-28.7 j Sr-90 9.74 1.3-18.7 l 11-03-95 Ba-133 94.1 81.7-116.3 i

l Co-60 58.77 51.3-68.7 Cs-134 36.55 31.3-48.7 i Cs-137 50.77 40.3-57.7 i Zn-65 126.6 102.4-147.6 1-23-96 Sr-89 79.2 64.3-81.7

, Sr-90 4.65 0-13.7 3

3-08-96 H-3 23429.8 18185-25818.9 4-16-96 Co-60 31.4 22.3-39.7 Cs-134 43.03 37.3-54.7 Cs-137 49.02 41.3-58.7 Nat-U 55.47 48.3-68.5 Ra-226 3.6 2.1-3.9 Ra-228 5.14 2.7-7.3 4-16-96 WATER Sr-89 46.07 34.3-51.7 Sr-90 14.73 7.3-24.7 6-07-96 Ba-133 734.63 614.9-875.1 82

] TABLE 4.2 (Cont.)

i

SUMMARY

OF EPA INTERCOMPARISON RESULTS JANUARY - DECEMBER 1996 YAEL EPA EPA Ref. SAMPLE NUCLIDE MEAN Control Date TYPE (pCi/1) Limits (pCi/1)

Co-60 95.99 90.3-107.7 Cs-134 76.35 70.3-87.7 Cs-137 198.1 179.7-214.3 Zn-65 303.43 248-352 6-21-96 Nat U 19.02 15-25.4 Ra-226 5.39 3.7-6.1 Ra-228 8.07 5-13 7-12-96 Sr-89 24.37 16.3-33.7 Sr-90 11.92 3.3-20.7 7-19-96 Alpha 10.82 13.8-35 Beta 40.53 36.1-53.5 8-09-96 H-3 10227.8 8991.4-12766.6 9-27-96 Nat U 9.68 4.9-15.3 Ra-226 13.22 10.4-17.6 Ra-228 6.24 2.6-6.8 10-04-96 I-131 LL 28.24 16.6-37.4 10-15-96 Co-60 13.71 6.3-23.7 Cs-134 18.99 11.3-28.7 Cs-137 30.02 21.3-38.7 Nat U 38.74 33.8-48 Ra-226 9.07 7.3-12.5 Ra-228 6.67 2.8-7.4 SI-89 11.8 1.3-18.7 Sr-90 22.93 16.3-33.7 10-25-96 Alpna 10.47 1.6-19 Beta 34.6 28.2-47.2 11-08-96 Ba-133 60.94 53.6-74.4 Co-60 43.68 35.3-52.7 Cs-134 10.65 2.3-19.7 Cs-137 19.74 10.3-27.7 Zn-65 34.46 26.3-43.7 12-06-96 Nat U 4.71 0-10.2 Ra-226 18.62 14.9-25.3 Ra-228 10.5 5.7-14.7 83

- - . . _ . .. - - .. . ~ - - . . . _ ~ ~ . . . - - -- _. - .. - - - - - - . . . = . . . . - - - - - -

i 1

l l

TABLE 4.3 l YAEL 1966 ANALYTICS CROSS-CHECK RESULTS FIRST QUARTER 1996-MILK NUCLIDE REPORTED VALUE KNOWN VALUE YAEL/ANALYTICS EVALUATION l

Cr-51 875 858 1.02 AGREEMENT l Mn-54 88 84 1.05 AGREEMENT

! Co-58 132 128 1.03 AGREEMENT Fe-59 235 223 1.05 AGREEMENT ,

Co-60 207 204 1.01 AGREEMENT l Zn-65 267 260 1.03 AGREEMENT Sr-89 35 31 1.13 AGREEMENT Sr-90 17 16 1.06 AGREEMENT -

I-131 11 13 0.85 AGREEMENT 1-131LL 11.8 13 0.91 AGREEMENT Cs-134 155 154 1.01 AGREEMENT Cs-137 170 170 1.0 AGREEMENT Ce-144 237 234 1.01 AGREEMENT l

FIRST QUARTER 1996 -WATER i !

l i l NUCLIDE REPORTED VALUE KNOWN VALUE YAEL/ANALYTICS EVALUATION ALPHA 12 10 1.2 AGREEMENT l BETA 118 107 1.03 AGREEMENT

Cr-51 328 322 1.02 AGREEMENT l Mn-54 30 31 0.97 AGREEMENT l Co-58 48 48 1.O AGREEMENT Fe-59 85 83 1.02 AGP.EEMENT Co-60 73 76 0.96 AGREEMENT Zn-65 90 97 0.93 AGREEMENT I-131 34 36 0.94 AGREEMENT Cs-134 55 58 0.95 AGREEMENT Cs-137 63 64 0.98 AGREEMENT Ce-141 88 88 1.0 AGREEMENT l Ra-226 68 70 0.97 AGREEMENT l Ra-228 49 49 1.O AGREEMENT U-234 40 40 1.O AGREEMENT U-238 42 41 1.01 AGREEMENT 4

l l

l 84

l i

l SECOND QUARTER 1996 - AIR FILTER l l

l NUCLIDE REPORTED VALUE KNOWN VALUE YAEL/ANALYTICS EVALUATION

! ALPHA 41 40 1.03 AGREEMENT BETA 185 179 1.03 AGREEMENT Cr-51 1071 953 1.12 AGREEMENT l

Mn-54 597 508 1.18 NON-AGREEMENT Co-58 176 157 1.12 AGREEMENT

{

j Fe-59 151 131 1.153 NON-AGREEMENT '

Co-60 153 142 1.08 AGREEMENT l Zn-65 110 98 1.12 AGREEMENT l Sr-89 <MDC 44 pC1/ filter Sr-90 57 64 0.89 AGREEMENT l Cs-134 281 282 1.0 AGREEMENT Cs-137 797 694 1.148 AGREEMENT Ce-141 380 363 1.05 AGREEMENT l SECOND QUARTER 1996 - MILK & WATER i NUCLIDE REPORTED VALUE KNOWN VALUE YAEL/ANALYTICS EVALUATION H-3 4580 4915 0.93 AGREEMENT K-40 1350 1269 1.06 AGREEMENT Cr-51 581 563 1.03 AGREEMENT Mn-54 311 300 1.04 AGREEMENT Co-58 93 93 1.O AGREEMENT Fe-59 82 77 1.06 AGREEMENT Co-60 84 84 1.0 AGREEMENT l Zn-65 53 58 0.91 AGREEMENT l

I-131 16 15 1.07 AGREEMENT Cs-134 167 166 1.01 AGREEMENT i Cs-137 409 410 1.0 AGREEMENT l Ce-141 219 215 1.02 AGREEMENT THIRD QUARTER 1996 - MILK NUCLIDE REPORTED VALUE KNOWN VALUE YAEL/ANALYTICS EVALUATION Cr-51 514 486 1.06 AGREEMENT Mn-54 189 180 1.05 AGREEMENT l Co-58 132 131 1.01 AGREEMENT i Fe-59 40.8 37 1.1 AGREEMENT Co-60 118 114 1.04 AGREEMENT Zn-65 73 70 1.04 AGREEMENT Sr-89 5.4 5 1.08 AGREEMENT Sr-90 22 22 1.0 AGREEMENT I-131 24.5 24 1.02 AGREEMENT Cs-134 226 222 1.02 AGREEMENT Cs-137 176 169 1.04 AGREEMENT Ce-141 325 318 1.02 AGREEMENT 85

. _ . - . _ . . . . _ _ - , - . . - _ . _ . . _.__.___._m___ _ _ _ _ _ . . _ . _ _ _ _ _ _ - . . - . . __.._._ _ _ _

THIRD QUARTER 1996 - WATER NUCLIDE REPORTED VALUE TJiOWN VALUE YAEL/ANALYTICS EVALUATION ALPHA 77 74 1.04 AGREEMENT BETA 77 70 1.1 AGREEMENT Cr-51 650 646 1.01 AGREEMENT Mn-54 248 239 1.04 AGREEMENT Co-58 172 174 0.99 AGREEMENT Fe-59 51 50 1.02 AGREEMENT Co-60 155 151 1.03 AGREEMENT Zn-65 98 93 1.05 AGREEMENT Sr-89 47 40 1.18 AGREEMENT Sr-90 36 35 1.03 AGREEMENT l I-131 49 50 0.98 AGREEMENT i Cs-134 299 295 1.01 AGREEMENT Cs-137 226 225 1.O AGREEMENT Ce-141 420 423 0.99 AGREEMENT FOURTH QUARTER 1996 - MILK, FILTER, WATER NUCLIDE REPORTED VALUE KNOWN VALUE YAEL/ANALYTICS EVALUATION ALPHA 75 80 0.94 AGREEMENT BETA 199 170 1.17 NON-AGREEMENT H-3 2440 2686 0.91 AGREEMENT Cr-51 202 214 0.94 AGREEMENT Mn-54 217 206 1.05 AGREEMENT Co-58 120 121 0.99 AGREEMENT Fe-59 52 49 1.06 AGREEMENT Co-60 113 110 1.03 AGREEMENT Zn-65 94 93 1.01 AGREEMENT SI-89 102 96 1.06 AGREEMENT Sr-90 72 77 0.94 AGREEMENT I-131 65 59 1.10 AGREEMENT I-131 LL 56 59 0.95 AGREEMENT Cs-134 168 175 0.96 AGREEMENT Cs-137 194 195 0.99 AGREEMENT Ce-144 278 277 1.00 AGREEMENT i

s 86 l

- ,_- ,.- - e s J A- emo. a-a -- )wa a 4

4 8 9

TABLE 4.4

SUMMARY

OF BLIND DUPLICATE SAMPLES SUBMITTED JANUARY - DECEMBER 1996 TYPE OF SAMPLE NU'MBER OF PAIRED SAMPLES SUBMITTED i COW MILK 21 GROUND WATER 6 SURFACE WATER 15 l ALGAE 2 MUSSELS 4 FOOD CROP 1 j TOTAL 49 d

I 87

l TABLE 4.5

SUMMARY

OF BLIND DUPLICATE RESULTS January - December 1996 ANALYSIS TYPE TOTAL ANALYSIS MILK WATER FOOD PROD MARINE MUSSEL TOTAL l

ALGAE l GAMMA 525 (5) 525 (4) 1 2 4 1057 (9)

Sr-89,90 4 - - - -

4 H-3 -

10 - - -

10 Gross Beta -

10 (1) - - -

10 (1)

Ra-226/228 1 1 I-131 26 - - - -

26

The number of paired measurements that did not meet the acceptance criteria are given in parentheses.

l l

I 88

5.0 Land Use census Technical Specification 4.12.2 requires that a Land Use census be conducted annually. The 1996 census was completed in accordance with the requirements of the ODCM. The census is used to identify the location of the nearest milk anime.1, the nearest residence, and the nearest garden of 50 square meters within five miles of plant. The distance from the plant for each of the above locations is shown in Table 5.1.

89

Table 5.1 Land Use census Results Nearest Nearest Nearest Residence Garden Milk Animal Sector (km) (km) (km)

N 1.0 4.2 NNE 3.2 3.2 NE 2.4 3.2 ENE 2.4 E 2.6

! ESE 2.4 SE 2.4 SSE 1.0 1.0 l S 1.0 1.1 l SSW l.0 SW l.0 5.2

! WSW 1.0 1.0 W 1.0 1.7 l WNW 1.0 6.1

! NW 1.0 7.1 NNW 1.1 S.5 1

i 1

l l

U i

l l

l 1 90 l

1 4

6.0 Referenca 1

l a 6.1 Seabrook Station Technical Specifications !

6.2 Seabrook Station Off - Site Dose Calculation Manual l i i

! l

j 4

I i

I' i

I d

a i 4

4 d !

4 !

e t

I i !

91

l 4

l l

1 i

i l

I ATTACHMENT I Sample Analysis Data i

' Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE TYPE CONC. STD DEV. MDC STA. LSN END DATE NUCLIDE

------------------ .....-------- ....----(pCi/kg! (pCi/kg) (pCi/kg)

...---------------------- j Irish Moss ALI 05 29696 06/03/96 Ag-110M ALI 05 9.70E+00 1.15E+01 4.02E+01 29696 06/03/96 Ba-140 -7.14E-07 5.99E+00 2.78E+01

' ALI 05 29696 06/03/96 Be-7 ALI 05 1.37E+02 6.28E+01 1.97E+02

' 29696 06/03/96 Ce-141 7.96E+00 6.86E+00 2.22E+01 ALI 05 29696 06/03/96 ALI 05 Ce-144 -3.65E+01 2.93E+01 1.06E+02

] 29696 06/03/96 Co-57 -2.68E+00 3.33E+00 1.20E+01 ALI 05 29696 06/03/96 ALI 05 Co-58 -6.01E+00 5.65E+00 2.39E+01 29696 06/03/96 Co-60 -2.37E+01 9.7GE+00 4.58E+01 2

ALI 05 29696 06/03/96 ALI 05 Cr-51 -1.37E+01 5.64E+01 2.07E+02 29696 06/03/96 Cs-134 1.07E+01 5.89E+00 1.94E+01 3

l ALI 05 29696 06/03/96 Cs-137 ALI -0.21E+00 7.20E+00 2.81E+01 05 29696 06/03/96 Fe-59 3.03E+01 3.20E+01 1.14E+02 ALI 05 29696 06/03/96 ALI 05 I-131 -4.61E+00 8.12E+00 3.16E+01 29696 06/03/96 K-40 9.51E+03 4.48E+02 3.58E+02

ALI 05 29696 06/03/96 Mn-54 ALI -2.45E+00 5.74E+00 2.27E+01 05 29696 06/03/96 Ru-103 ALI 05 2.10E+00 4.69E+00 1.75E+01 29696 06/03/96 Ru-106 -2.35E+01 6.02E+01 2.41E+02 ALI 05 29696 06/03/96 Sb-124 ALI 05 9.16E+00 B.17E+00 2.83E+01 29696 06/03/96 Se-75 -0.64E+00 5.08E+00 1.84E+01 ALI 05 29696 06/03/96 Th-232 ALI 05 2.05E+01 3.08E+01 1.09E+02 29696 06/03/96 Zn-65 1.70E+01 2.13E+01 7.46E+01 ALI 05 29696 06/03/96 Zr-95 -2.38E+01 1.19E+01 5.09E+01 ALI 55 29697 06/03/96 Ag-110M 55 3.79E+00 6.83E+00 2.40E+01 ALI 29697 06/03/96 Ba-140 3.84E+00 5.74E+00 2.13E+01 ALI $5 29697 06/03/96 Be-7 ALI 1.26E+02 6.29E+01 2.10E+02 55 29697 06/03/96 Ce-141 ALI 55 3.74E+00 5.57E+00 1.84E+01 29697 06/03/96 Ce-144 -4.58E+01 2.17E+01 8.10E+01 ALI 55 29697 06/03/96 Co-57 ALI 0.88E+00 2.73E+00 9.18E+00 55 29697 06/03/96 Co-58 ALI 55 2.47E+00 4.56E+00 1.61E+01 29697 06/03/96 Co-60 -1.23E+01 6.90E+00 3.03E+01 ALI 55 29697 06/03/96 Cr-51 1.91E+01 3.88E+01 1.37E+02 ALI 55 29697 06/03/96 Cs-134 ALI 55

-1.60E+01 9.79E+00 3.36E+01 29697 06/03/96 Cs-137 8.52E+00 5.16E+00 1.74E+01 ALI 55 29697 06/03/96 Fe-59 ALI 55 3.12E+00 1.50E+01 5.66E+01 29697 06/03/96 I-131 1.13E+01 7.16E+00 2.35E+01 ALI 55 29697 06/03/96 K-40 ALI 6.62E+03 2.97E+02 2.66E+02

55 29697 06/03/96 Mn-54 1.09E+00 4.84E+00 1.74E+01 ALI 55 29697 06/03/96 Ru-103 -2.85E+00 ALI 4.39E+00 1.71E+01 55 29697 06/03/96 Ru-106 -6.54E+01 4.50E+01 1.89E+02 ALI 55 29697 06/03/96 Sb-124 6.67E+00 4.72E+00 9.03E+00 ALI 55 29697 06/03/96 Se-75 2.41E+00 ALI 55 4.59E+00 1.62E+01 23697 06/03/96 Th-232 4.33E+01 1.89E+01 5.58E+01 ALI 55 29697 06/03/96 ALI Zn-65 2.18E+00 1.46E+01 5.35E+01 55 29697 06/03/96 Zr-95 -8.03E+00 6.80E+00 2.85E+01 ALI 05 33131 12/03/96 Ag-110M 1.56E+00 8.13E+00 2.98E+01 ALI 05 33131 12/03/96 Ba-140 ALI 2.17E+00 6.38E+00 2.75E+01 05 33131 12/03/96 Be-7 1.27E+02 5.46E+01 1.57E+02

Radioactivity detected (i.e.,

Concentra'. ion > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE ( (pCi/kg)

___ ___________ ___ __________________________pCi/kg) (pCi/kg)

ALI 05 33131 12/03/96 Ce-141 ALI 05

-1.71E+01 7.56E+00 2.81E+01 33131 12/03/96 Ce-144 -3.19E+01 2.91E+01 1.01E+02 ALI 05 33131 12/03/96 Co-57 05 2.91E+00 3.58E+00 1.12E+01 ALI 33131 12/03/96 Co-58 -3.48E+00 5.30E+00 2.17E+01 ALI 05 33131 12/03/96 Co-60 ALI 05

-1.00E+01 6.48E+00 3.07E+01 33131 12/03/96 Cr-51 -5.64E+00 5.29E+01 1.90E+02 ALI 05 33131 12/03/96 Cs-134 ALI 05 4.21E+00 6.01E+00 2.01E+01 33131 12/03/96 Cs-137 6.86E+00 7.13E+00 2.49E+01 ALI 05 33131 12/03/96 ALI 05 Fe-59 -2.68E+00 2.35Et01 9.02E+01 33131 12/03/96 I-131 -4.04E+00 1.19E+01 4.39E+01 ALI 05 33131 12/03/96 X-40 8.64E+03 4.34E+02 3.83E+02

ALI 05 33131 12/03/96 Mn-54 2.88E+00 5.08E+00 1.81E+01 ALI 05 33131 12/03/96 Ru-103 ALI 05 8.42E+00 5.99E+00 1.92E+01 33131 12/03/96 Ru-106 -1.15E+01 5.53E+01 2.17E+02 ALI 05 33131 12/03/96 Sb-124 -3.40E+00 1.14E+01 5.33E+01 ALI 05 33131 12/03/96 Se-75 ALI 3.01E+00 7.02E+00 2.41E+01 05 33131 12/03/96 Th-232 05 2.59E+01 3.01E+01 1.01E+02 ALI 33131 12/03/96 Zn-65 -2.83E+01 2.07E+01 8.30E+01 ALI 05 33131 12/03/96 Zr-95 1.11E+01 1.20E+01 3.98E+01 ALI 55 33132 12/04/96 Ag-110M 1.08E+01 ALI 55 7.41E+00 2.29E+01 33132 12/04/96 Ba-140 -2.31E+00 5.81E+00 3.07E+01 ALI 55 33132 12/04/96 Be-7 ALI 3.51E+02 8.10E+01 2.40E+02

55 33132 12/04/96 Ce-141 -1.82E+00 ALI 5.68E+00 1.92E+01 55 33132 12/04/96 Ce-144 2.39E+01 2.02E+01 6.19E+01 ALI 55 33132 12/04/96 Co-57 -3.18E+00 2.36E+00 8.56E+00 ALI 55 33132 12/04/96 co-58 6.87E+00 ALI 55 5.37E+00 1.72E+01 33132 12/04/96 Co-60 0.00E+00 4.53E+00 2.10E+01 ALI 55 33132 12/04/96 Cr-51 ALI 55

-8.34E+01 4.52E+01 1.81E+02 33132 12/04/96 Cs-134 9.79E+00 4.81E+00 1.37E+01 ALI 55 33132 12/04/96 Cs-137 8.10E+00 ALI 55 5.73E+00 1.91E+01 33132 12/04/96 Fe-59 5.77E+00 2.17E+01 8.21E+01 ALI 55 33132 12/04/96 I-131 1.49E+01 ALI 55 8.64E+00 2.67E+01 33132 12/04/96 K-40 4.57E+03 3.33E+02 3.11E+02

ALI 55 33132 12/04/96 Mn-54 4.39E+00 5.38E+00 1.84E+01 ALI 55 33132 12/04/96 Ru-103 1.08E+01 5.49E+00 1.63E+01 ALI 55 33132 12/04/96 Ru-106 1.16E+02 5.90E+01 1.84E+02 ALI 55 33132 12/04/96 Sb-124 7.34E+00 ALI 55 1.64E+01 6.48E+01 33132 12/04/96 Se-75 1.14E+00 5.48E+00 1.92E+01 ALI 55 33132 12/04/96 Th-232 -2.40E+01 ALI 55 2.13E+01 9.04E+01 33132 12/04/96 Zn-65 1.18E+01 3.14E+01 1.25E+02 ALI 55 33132 12/04/96 Zr-95 ~7.12E+00 l

7.79E+00 3.41E+01 {

j l

i Radioactivity detected (i . e . , Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

Fish FH 03 28270 02/28/96 Ag-110M -0.99E+00 9.48E+00 3.*1E+01 FH 03 28270 02/28/96 Ba-140 2.54E+01 2.91E+01 1.01E+02 FH 03 28270 02/28/96 Be-7 6.53E+01 8.08E+01 2.7BE+02 FH 03 28270 02/28/96 Ce-141 1.94E+01 1.61E+01 5.13E+01 FH 03 28270 02/28/96 Ce-144 -1.31E+01 4.30E+01 1.45E+02 FH 03 28270 02/28/96 Co-57 1.44E+00 5.38E+00 1.77E+01 FH 03 28270 02/28/96 Co-58 2.94E+00 9.10E+00 3.19E+01 FH 03 28270 02/28/96 Co-60 -6.54E+00 8.64E+00 3.57E+01 FH 03 28270 02/28/96 Cr-51 -1.97E+02 1.08E+02 4.09E+02 FH 03 28270 02/28/96 Cs-134 0.16E+00 1.0BE+01 3.94E+01 FH 03 28270 02/28/96 Cs-137 -2.89E+00 8.95E+00 3.41E401 FH 03 28270 02/28/96 Fe-59 5.33E+00 3.41E+01 1.25E+02 FH 03 28270 02/28/96 I-131 -7.97E+01 6.54E+01 2.42E+02 ;

FH 03 28270 02/28/96 K-40 3.16E+03 2.67E+02 5.23E+02

FH 03 28270 02/28/96 Mn-54 1.20E+01 8.69E+00 2.81E+01 i FH 03 28270 02/28/96 Ru-103 5.05E+00 1.03E+01 3.61E+01 l FH 03 28270 02/28/96 Ru-106 -6.25E+00 8.65E+01 3.22E+02 FH 03 28270 02/28/96 Sb-124 -2.17E+01 1.7BE+01 8.09E+01 FH 03 28270 02/28/96 Se-75 -5.19E+00 1.07E+01 3.81E+01 FH 03 28270 02/28/96 Th-232 2.48E+01 3.68E+01 1.25E+02 03 l FH 28270 02/28/96 Zn-65 1.32E+01 2.13E+01 7.49E+01 j TH 03 28270 02/28/96 Zr-95 0.00E+00 1.75E+01 6.21E+01 FH 53 28271 03/12/96 Ag-110M 7.89E+00 1.12E+01 3.93E+01 FH 53 28271 03/12/96 Ba-140 1.96E+01 1.46E+01 4.90E+01 FH 53 28271 03/12/96 Be-7 9.12E+01 6.19E+01 2.05E+02 FH 53 28271 03/12/96 Ce-141 2.43E+00 9.37E+00 3.10E+01 FH 53 28271 03/12/96 Ce-144 -B.13E+00 2.98E+01 1.01E+02 FH 53 28271 03/12/96 Co-57 -0.75E+00 3.79E+00 1.2BE+01 FH 53 28271 03/12/96 Co-58 3.12E+00 7.25E+00 2.54E+01 FH 53 28271 03/12/96 Co-60 3.33E+00 7.65E+00 2.92E+01 FH 53 28271 03/12/96 Cr-51 6.74E+00 6.35E+01 2.25E+02 l FH 53 28271 03/12/96 Cs-134 1.78E+01 8.36E+00 2.74E+01 FH 53 28271 03/12/96 Cs-137 1.37E+01 7.78E+00 2.60E+01 i FH 53 28271 03/12/96 Fe-59 -5.18E+00 2.01E+01 8.19E+01 FH 53 28271 03/12/96 I-131 1.01E+01 1.54E+01 5.35E+01 FH 53 28271 03/12/96 K-40 3.24E+03 2,69E+02 4.91E+02

FH 53 28271 03/12/96 Mn-54 -1.67E+00 6.43E+00 2.39E+01 FH 53 28271 03/12/96 Ru-103 7.53E+00 7.00E+00 2.39E+01 FH 53 28271 03/12/96 Ru-106 -4.64E+01 7.57E+01 2.91E+02 FH 53 28271 03/12/96 Sb-124 -1.91E+01 1.51E+01 7.17E+01 FH 53 28271 03/12/96 Se-75 -7.42E+00 7.21E+00 2.57E+01 FH 53 28271 03/12/96 Th-232 -1.70E+01 3.06E+01 1.16E+02 FH 53 28271 03/12/96 Zn-65 -4.31E+01 1.79E+01 7.72E+01 FH 53 28271 03/12/96 Zr-95 -2.54E+00 1.20E+01 4.43E+01 FH 03 29699 05/31/96 Ag-110M 1.82E+00 1.14E+01 4.19E+01 FH 03 29699 05/31/96 Ba-140 4.63E+00 1.44E+01 5.52E+01 FH 03 29699 05/31/96 Be-7 -1.65E+01 5.84E+01 2.18E+02

Radioactivity detected (i . e . , Concentration > 3 Std. Deviations).

- . - - _ . _ . - . _ . - . _ . - -...__..___. _ - -....~ - __. __.- _.~.-. -

+

) Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996) ,

t SAMPLE CONC. STD DEV. MDC !

i TYPE STA. LSN END DATE NUCLIDE (pCi/kg) ( (pCi/kg) 3 _______.._____..__________________________________________pCi/kg) ____________________

l

! FH 03 29699 05/31/96 Ce-141 -1.91E+01 1.07E+01 3.80E+01 FH 03 29699 05/31/96 Ce-144 -5.06E+01 3.77E+01 '

1.32E+02 i

FH 03 29699 05/31/96 Co-57 -2.58E+00 4.75E+00 1.62E+01 i

FH 03 29699 05/31/96 Co-58 -4.66E+00 7.20E+00 2.78E+01 FH 03 29699 05/31/96 Co-60 4.84E+00 8.37E+00 3.15E+01 !

FH 03 29699 05/31/96 Cr-51 -7.09E+00 7.05E+01 2.52E+02

~

FH 03 29699 05/31/96 Cs-134 -8.09E+00 8.23E+00 3.22E+01 l FH 03 29699 05/31/96 Cs-137 1.81E+01 8.55E+00 2.78E+01 FH 03 29699 05/31/96 Fe-59 -2.15E+01 2.30E+01 9.85E+01 FH 03 29699 05/31/96 I-131 9.27E+00 1.73E+01 6.03E+01 FH 03 29699 05/31/96 K-40 2.96E+03 2.73E+02 5.11E+02

FH 03 29699 05/31/96 Mn-54 1.20E+01 6.96E+00 2.17E+01 FH 03 29699 05/31/96 Ru-103 4.21E+-00 8.29E+00 2.92E+01 FH 03 29699 05/31/96 Ru-106 9.81E+00 7.71E+01 2.88E+02 FH 03 29699 05/31/96 Sb-124 1.93E401 1.99E+01 7.07E+01 FH 03 29699 05/31/96 Se-75 -1.62E+00 8.07E+00 2.78E+01 FH 03 29699 05/31/96 Th-232 -4.28E+01 3.33E+01 1.32E+02 FH 03 29699 05/31/96 Zn-65 -5.40E+00 1.86E+01 7.13E+01 FH 03 .29699 05/31/96 Zr-95 2.08E+01 1.38E+01 4.44E+01 FH 53 29700 06/03/96 Ag-110M -9.50E+00 9.54E+00 3.84E+01 !

FH 53 29700 06/03/96 Ba-140 8.84E+00 1.22E+01 4.43E+01 FH 53 29700 06/03/96 Be-7 -3.61E+01 5.36E+01 2.04E+02 ;

FH 53 29700 06/03/96 Ce-141 1.31E+01 8.55E+00 2.70E+01 FH 53 29700 06/03/96 Ce-144 2.87E+01 3.07E+01 9.91E+01 FH 53 29700 06/03/96 Co-57 0.91E+00 3.72E+00 1.24E+01 FH 53 29700 06/03/96 Co-58 1.92E+00 7.10E+00 2.52E+01 FH 53 29700 06/03/96 Co-60 -9.07E+00 7.72E+00 3.39E+01 FH 53 29700 06/03/96 Cr-51 -7.22E+01 6.02E+01 2.26E+02 FH 53 29700 06/03/96 Cs-134 4.69E+00 7.33E+00 2.64E+01 TH 53 29700 06/03/96 Cs-137 0.70E+00 7.53E+00 2.84E+01 FH 53 29700 06/03/96 Fe-59 -2.08E+00 2.93E+01 1.11E+02 FH 53 29700 06/03/96 I-131 4.26E+00 1.33E+01 4.67E+01 FH 53 29700 06/03/96 K-40 2.74E+03 2.46E+02 4.34E+02

FH 53 29700 06/03/96 Mn-54 -1.51E+00 6.29E+00 2.35E+01 TH 53 29700 06/03/96 Ru-103 9.14E+00 7.54E+00 2.54S+01 FH 53 29700 06/03/96 Ru-106 1.44E+01 7.10E+01 2.63E+02 FH 53 29700 06/03/96 Sb-124 4.72E+00 1.42E+01 5.67E+01 FH 53 29700 06/03/96 Se-75 1.42E+01 8.13E+00 2.66E+01 FH 53 29700 06/03/96 Th-232 3.02E+01 2.89E+01 9.91E+01 FH 53 29700 06/03/96 Zn-65 -2,41E+01 1.79E+01 7.29E+01 FH 53 29700 06/03/96 Zr-95 -4.,79E+00 1.14E+01 4.31E+01 FH 03 31234 08/26/96 Ag-110M -5.94E+00 1.34E+01 5.67E+01 '

FH 03 31234 08/26/96 Ba-140 1.69E+01 1.26E+01 3.92E+01 FH 03 31234 08/26/96 Be-7 -3.38E+01 9.01E+01 3.49E+02 '

FH 03 31234 08/26/96 Ce-141 1.01E+01 1.29E+01 4.10E+01 FH 03 31234 08/26/96 Ce-144 -1.51E+01 4.85E+01 1.67E+02 FH 03 31234 08/26/96 Co-57 0.31E+00 6.51E+00 2.16E+01 TH 03 31234 08/26/96 Co-58 -8.32E+00 1.08E+01 4.57E+01 FH 03 31234 08/26/96 Co-60 -4.89E+00 1.47E+01 6.41E+01

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

. _ _ _ _ _ _ _ _ m . _ _ _ _ _ _ . _ _ _ _ _ _ ___. . __ _ _ _ _ _ _. -

l l

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg)

__._______________________________________________________pCi/kg) ( (pCi/kg)

FH 03 31234 08/26/96 Cr-51 2.16E+01 9.16E+01 3.25E+02 FH 03 31234 08/26/96 Cs-134 -1.50E+01 1.37E+01 5.62E+01 FH 03 31234 08/26/96 Cs-137 -5.62E+00 1.38E+01 5.57E+01 FH 03 31234 08/26/96 Fe-59 -4.75E+01 3.59E+01 1.69E+02 FH 03 31234 08/26/96 I-131 -2.98E+00 1.53E+01 5.70E+01 FH 03 31234 08/26/96 K-40 2.93E+03 4.75E+02 1.08E+03

FH 03 31234 08/26/96 Mn-54 1.42Et01 1.16E+01 3.73E+01 FH 03 31234 08/26/96 Ru-103 5.03E+00 8.41E+00 3.07E+01 FH 03 31234 08/26/96 Ru-106 7.71E+01 9.26E+01 3.37E+02 FH 03 31234 08/26/96 Sb-124 -1.63E+01 3.85E+01 1.67E+02 FH 03 31234 08/26/96 Se-75 -1.56E+01 1.21E+01 4.75E+01 FH 03 31234 08/26/96 Th-232 7.18E+01 4.67E+01 1.47E+02 FH 03 31234 08/26/96 Zn-65 -4.48E+01 3.33E+01 1.45E+02 l'

FH 03 31234 08/26/96 Zr-95 -2.83E+00 2.01E+01 7.77E+01 1 FH 53 31235 08/27/96 Ag-110M 3.22E+00 1.09E+01 4.05E+01 FH 53 31235 08/27/96 Ba-140 8.14E+00 1.02E+01 3.75E+01 FH 53 31235 08/27/96 Be-7 -1.07E+02 8.30E+01 3.27E+02 FH 53 31235 08/27/96 Ce-141 -0.94E+00 1.13E+01 ".72E+01 FH 53 31235 08/27/96 Ce-144 -7.40E+01 4.89E+01 1.71E+02 I FH 53 31235 08/27/96 Co-57 4.73E+00 6.43E+00 2.01E+01 l FH 53 31235 08/27/96 Co-58 -8.47E400 9.73E+00 3.86E+01 l FH 53 31235 08/27/96 Co-60 1.81E+01 1.20E+01 3.80E+01 !

FH 53 31235 08/27/96 Cr-51 -7.19E+01 8.02E+01 2.99E+02 FH 53 31235 08/27/96 Cs-134 -2.80E+01 1.29E+01 5.29E+01 FH 53 31235 08/27/96 Cs-137 -2.15E+00 1.16E+01 4.45E+01 FH 53 31235 08/27/96 Fe-59 -6.79E+00 2.89E+01 1.16E+02 FH 53 31235 08/27/96 I-131 -2.72E+00 1.31E+01 4.74E+01 FH 53 31235 08/27/96 K-40 3.99E+03 4.14E+02 7.78E+02

FH 53 31235 08/27/96 Mn-54 1.60E+01 1.10E+01 3.41E+01 FH 53 31235 08/27/96 Ru-103 -0.8.8E+00 9.91E+00 3.61E+01 FH 53 31235 08/27/96 Ru-106 5.36E+01 1.15E+02 4.11E+02 FH 53 31235 08/27/96 Sb-124 5.02E+00 1.85E+01 7.65E+01 FH 53 31235 08/27/96 Se-75 2.80E+00 1.14E+01 3.92E+01 FH 53 31235 08/27/96 Th-232 0.00E+00 4.16E+01 1.53E+02 FH 53 31235 08/27/96 Zn-65 -2.55E+01 2.65E+01 1.07E+02 FH 53 31235 08/27/96 Zr-95 8.6BE+00 1.45E+01 5.08E+01 FH 03 33079 11/26/96 Ag-110M 3.24E+00 1.36E+01 5.16E+01 FH 03 33079 11/26/96 Ba-140 7.32E+00 2.19E+01 8.95E+01 FH 03 33079 11/26/96 Be-7 -1.63E+02 8.43E+01 3.73E+02 I FH 03 33079 11/26/96 Ce-141 1.03E+01 1.27E+01 4.03E+01 FH 03 33079 11/26/96 Ce-144 7.11E+01 4.61E+01 1.38E+02 FH 03 33079 11/26/96 Co-57 -5.07E+00 4.79E+00 1.75E+01 FH 03 33079 11/26/96 Co-58 6.43E+00 8.66E+00 3.12E+01 FH 03 33079 11/26/96 Co-60 1.79E+01 1.23E+01 4.01E+01 FH 03 33079 11/26/96 Cr-51 1.47E+01 1.06E+02 3.76E+02 l FH 03 33079 11/26/96 Cs-134 -1.06E+01 1.06E+01 4.16E+01 i

FH 03 33079 11/26/96 Cs-137 -8.19E+00 1.19E+01 4.95E+01 TH 03 33079 11/26/96 Fe-59 2.90E+01 3.30E+01 1.19E+02 FH 03 33079 11/26/96 I-131 2.74E+00 2.73E+01 9.99E+01 l

1 f

Radioactivity detected (i . e . , Concentration > 3 Std. Deviations).

l

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

FH 03 33079 11/26/96 K-40 3.46E+03 4.21E+02 6.25E+02

FH 03 33079 11/26/96 Mn-54 0.74E+00 1.03E+01 3.89E+01 FH 03 33079 11/26/96 Ru-103 -1.29E+00 1.22E+01 4.58E+01

FH 03 33079 11/26/96 Ru-106 8.56E+01 1.09E402 3.89E+02 FH 03 33079 11/26/96 Sb-124 1.56E+01 2.79E+01 1.12E+02 FH 03 33079 11/26/96 Se-75 -2.43E+01 1.25E+01 4.97E+01 FH 03 33079 11/26/96 Th-232 5.87E+01 4.72E+01 1.56E+02 FH 03 33079 11/26/96 Zn-65 -1.97E+01 2.80E+01 1.18E+02 FH 03 33079 11/26/96 Zr-95 -2.34E+01 2.17E+01 8.94E+01 FH 53 33134 12/04/96 Ag-110M -1.10E+00 1.66E+01 6.28E+01

) FH 53 33134 12/04/96 Ba-140 0.00E+00 8.64E+00 4.42E+01 FH 53 33134 12/04/96 Be-7 -1.21E+02 1.07E+02 4.23E+02 FH 53 33154 12/04/96 Ce-141 -1.47E+01 1.48E+01 5.18E+01

, FH 53 33134 12/04/96 Ce-144 -6.48E+01 5.88E+01 2.06E+02 FH 53 33134 12/04/96 Co-57 -3.23E+00 7.00E+00 2.39E+01 FH 53 33134 12/04/96 Co-58 -3.13E+00 9.64E+00 3.93E+01 FH 53 33134 12/04/96 Co-60 1.64E+00 1.01E+01 4.27E+01 FH 53 33134 12/04/96 Cr-51 1.02E+02 8.47E+01 2.77E+02 FH 53 33134 12/04/96 Cs-134 -1.67E+0i 1.33E+01 5.47E+01 FH 53 33134 12/04/96 Cs-137 3.89E+00 1.26E+01 4.79E+01 FH 53 33134 12/04/96 Fe-59 -1.04E+01 3.78E+01 1.54E+02 FH 53 33134 12/04/96 I-131 3.25E+00 2.00E+01 7.06E+01 FH 53 33134 12/04/96 K-40 3.88E+03 4.80E+02 9.51E+02

FH 53 33134 12/04/96 Mn-54 -3.80E+00 1.03E+01 4.12E+01 4

FH 53 33134 12/04/96 Ru-103 -7.01E+00 1.02E+01 4.13E+01 l

i FH S3 33134 12/04/96 Ru-106 0.00E+00 1.20E+02 4.59E+02 FH 53 33134 12/04/96 Sb-124 5.42E+00 2.60E+01 1.08E+02 FH 53 33134 12/04/96 Se-75 9.79E+00 1.30E+01 4.38E+01 FH 53 33134 12/04/96 Th-232 -1.45E+01 4.33E+01 1.74E+02 FH 53 33134 12/04/96 Zn-65 2.37E+01 2.66E+01 9.34E+01 FH 53 33134 12/04/96 Zr-95 -2.27E+01 2.10E+01 8.68E+01

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

American Lobster (Homarus americanus)

HA 04 29710 06/03/96 Ag-110M -0.53E+00 1.05E+01 3.97E+01 RA 04 29710 06/03/96 Ba-140 1.99E+01 1.27E+01 4.13E+01 RA 04 29710 06/03/96 Be-7 7.90E+00 5.30E+01 1.94E+02 HA 04 29710 06/03/96 Ce-141 0.49E+00 9.11E+00 3.05E+01 RA 04 29710 06/03/96 Ce-144 2.52E+01 3.20E+01 1.04E+02 HA 04 29710 06/03/96 Co-57 2.28E+00 4.11E+00 1.35E+01 HA 04 29710 06/03/96 Co-58 1.45E+00 7.61E+00 2.73E+01 HA 04 29710 06/03/96 Co-60 -6.68E+00 1.11E+01 4.44E+01 HA 04 29710 06/03/96 Cr-51 6.57E+00 5.84E+01 2.09E+02 HA 04 29710 06/03/96 Cs-134 -2.03E+00 8.94E+00 3.34E+01 HA 04 29710 06/03/96 Cs-137 1.10E+01 8.96E+00 3.12E+01 RA 04 29710 06/03/96 Fe-59 -4.29E+01 2.58E+01 1.13E+02 i RA 04 29710 06/03/96 I-131 2.00E+01 1.35E+01 4.47E+01 HA 04 29710 06/03/96 K-40 2.29E+03 2.40E+02 4.53E+02

HA 04 29710 06/03/96 Mn-54 4.34E+00 6.83E+00 2.38E+01 HA 04 29710 06/03/96 Ru-103 -8.00E+00 7.07E+00 2.77E+01 RA 04 29710 06/03/96 Ru-106 -6.10E+01 7.42E+01 2.93E+02 RA 04 29710 06/03/96 Sb-124 0.00E+00 1.79E+01 7.29E+01 i RA 04 29710 06/03/96 Se-75 -8.53E+00 8.17E+00 3.03E+01 i RA 04 29710 06/03/96 Th-232 4.72E+00 3.24E+01 1.18E+02 l HA 04 29710 06/03/96 Zn-65 -0.48E+00 1.74E+01 6.60E+01 '

HA 04 29710 06/03/96 Zr-95 -1.26E+01 1.27E+01 4.96E+01 RA 54 29711 06/03/96 Ag-110M 3.43E+01 1.36E+01 4.06E+01 HA 54 29711 06/03/96 Ba-140 -3.29E+01 1.32E+01 6.63E+01 HA 54 29711 06/03/96 Be-7 -5.47E+01 7.34E+01 2.77E+02 HA 54 29711 06/03/96 Ce-141 -4.79E+00 1.13E+01- 3.83E+01 HA 54 29711 06/03/96 Ce-144 3.81E+00 4.12E+01 1.38E+02 HA 54 29711 06/03/96 Co-57 -1.02E+00 4.81E+00 1.63E+01 RA 54 29711 06/03/96 Co-58 -1.10E+01 9.42E+00 3.66E+01 I HA 54 29711 06/03/96 Co-60 2.82E+01 1.06E+01 3.01E+01 HA 54 29711 06/03/96 Cr-51 -3.09E+01 7.71E+01 2.80E+02 RA 54 29711 06/03/96 Cs-134 -3.42E+00 1.03E+01 3.85E+01 HA 54 29711 06/03/96 Cs-137 1.48E+01 8.52E+00 2.84E+01 HA 54 29711 06/03/96 Fe-59 -1.83E+01 2.60E+01 1.09E+02 RA 54 29711 06/03/96 I-131 1.63E+01 1.65E+01 5.63E+01 HA 54 29711 06/03/96 K-40 2.79E+03 2.91E+02 5.90E+02

HA 54 29711 06/03/96 Mn-54 0.18E+00 9.0BE+00 3.26E+01 RA 54 29711 06/03/96 Ru-103 3.48E+00 8.29E+00 2.96E+01 HA 54 29711 06/03/96 Ru-106 -3.70E+00 7.87E+01 3.00E+02 HA 54 29711 06/03/96 Sb-124 -4.68E+01 2.03E+01 1.02E+02 HA 54 29711 06/03/96 Se-75 1.76E+01 8.93E+00 2.75E+01 HA 54 29711 06/03/96 Th-232 5.41E+01 3.75E+01 1.24E+02 HA 54 29711 06/03/96 Zn-65 -4.34E+01 2.45E+01 1.01E+02 HA 54 29711 06/03/96 Zr-95 1.27E+00 1.73E+01 6.15E+01

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

. . . . . - - - - - - , . =. . . . .- - - - . . _ -

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE ( (pCi/kg) (pCi/kg)

______________________________________________pCi/kg) 1

________________________________ 1 1

Mussel MU 09 29624 05/24/96 Ag-110M MU 2.99E+00 7.43E+00 2.57E+01 f 09 29624 05/24/96 Ba-140 -7.86E+00 1.15E+01 4.57E+01 MU 09 29624 05/24/96 Be-7 l

MU 6.45E+01 5.32E+01 1.78E+02 09 29624 05/24/96 Ce-141 -4.76E+00 8.66E+00 2.91E+01 MU 09 29624 05/24/96 Ce-144 MU 2.81E+01 2.80E+01 8.99E+01 09 29624 05/24/96 Co-57 -3.58E+00 3.51E+00 1.19E+01 MU 09 29624 05/24/96 Co-58 MU

-1.70E+00 5.96E+00 2.13E+01 09 29624 05/24/96 Co-60 1.35E+01 5.78E+00 1.79E+01 1 MU 09 29624 05/24/96 Cr-51 MU 4.16E+01 6.26E+01 2.13E+02 !

09 29624 05/24/96 Cs-134 -9.59E+00 6.19E+00 2.39E+01 '

MU 09 29624 05/24/96 MU Cs-137 1.94E+00 5.74E+00 2.10E+01 09 29624 05/24/96 Fe-59 -2.77E+01 1.71E+01 7.07E+01 i

MU 09 29624 05/24/96 I-131 4.78E+00 2.06E+01 7.15E+01 )

MU 09 29624 05/24/96 MU K-40 8.58E+02 1.42E+02 3.97E+02

09 29624 05/24/96 Mn-54 4.46E+00 s

MU 4.97E+00 1.66E+01 09 29624 05/24/96 Ru-103 -3.22E+00 6.35E+00 2.32E+01 l

MU 09 29624 05/24/96 Ru-106 3.20E+01 5.47E+01 1.96E+02 MU 09 29624 05/24/96 Sb-124 -2.06E+01 1.27E+01 5.52E+01 MU 09 29624 05/24/96 Se-75 0.98E+00 MU 7.52E+00 2.60E+01 09 29624 05/24/96 Th-232 -6.09E+00 2.17E+01 7.78E+01 MU 09 29624 05/24/96 2n-65 MU

-4.16E+00 1.29E+01 4.81E+01 09 29624 05/24/96 Zr-95 -0.60E+00 1.09E+01 3.84E+01 MU 59 29625 05/29/96 Ag-110M 4.67E+00 MU 9.57E+00 3.40E+01 59 29625 05/29/96 Ba-140 -2.00E+01 1.22E+01 5.32E+01 MU 59 29625 05/29/96 Be-7 1.02E+02 MU 5.68E+01 1.85E+02 59 29625 05/29/96 Ce-241 5.05E+00 8.76E+00- 2.85E+01 MU 59 29625 05/29/96 Ce-144 2.10E+01 MU 3.36E+01 1.09E+02 59 29625 05/29/96 Co-57 3.48E+00 MU 3.93E+00 1.27E+01 59 29625 05/29/96 Co-58 5.52E+00 6.22E+00 2.10E+01 MU 59 29625 05/29/96 Co-60 -5.04E+00 7.32E+00 2.99E+01 MU 59 29625 05/29/96 Cr-51 -8.64E+01 MU 6.12E+01 2.27E+02 59 29625 05/29/96 Cs-134 -8.40E+00 6.78E+00 2.64E+01 MU 59 29625 DS/29/96 Cs-137 4.39E+00 MD 6.76E+00 2.44E+01 59 29625 05/29/96 Fe-59 -1.56E+01 2.27E+01 9.03E+01 MU 59 29625 05/29/96 I-131 -1.29E+01 1.39E+01 5.10E+01 MU 59 29625 05/29/96 K-40 1.24E+03 1.81E+02 4.54E+02

MU 59 29625 05/29/96 Mn-54 7.71E+00 6.69E+00 2.20E+01 MU 59 29625 05/29/96 Ru-103 3.27E+00 7.17E+00 2.51E+01 MU 59 29625 05/29/96 Ru-106 -7.47E+01 6.68E+01 2.61E+02 MU 59 29625 05/29/96 Sb-124 1.51E+01 1.7BE+01 6.33E+01 MU 59 29625 05/29/96 Se-75 -9.69E+00 6.58E+00 2.35E+01 MU 59 29625 05/29/96 Th-232 -1.04E+01 2.56E+01 9.59E+01 MU 59 29625 05/29/96 Zn-65 1.46E+01 1.53E+01 5.30E+01 MU 59 29625 05/29/96 Zr-95 1.46E+01 1.27E+01 4.17E+01 I

MU 06 29701 06/03/96 Ag-110M -1.11E+01 6.42E+00 2.52E+01 MU 06 29701 06/03/96 Ba-140 l 1 4.34E+00 6.61E+00 2.33E+01 MU 06 29701 06/03/96 Be-7 1.24E+01 4.50E+01 1.57E+02 ;

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

i i

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

MU 06 29701 06/03/96 Ce-141 1.42E+01 6.88E+00 2.13E+01 MU 06 29701 06/03/96 Ce-144 -2.62E+01 2.61E+01 8.87E+01 MU 06 29701 06/03/96 Co-57 -1.50E+00 3.35E+00 1.12E+01 MU 06 29701 06/03/96 Co-58 6.15E+00 4.82E+00 1.57E+01 MU 06 29701 06/03/96 Co-60 -3.95E+00 5.78E+00 2.30E+01 MU 06 29701 06/03/96 Cr-51 3.80E+01 4.62E+01 1.57E+02 MU 06 29701 06/03/96 Cs-134 3.68E+00 1.21E+01 4.73E+01 MU 06 29701 06/03/96 Cs-137 3.71E+00 5.85E+00 2.10E+01 MU 06 29701 06/03/96 Fe-59 1.20E+01 1.21E+01 4.19E+01 MU 06 29701 06/03/96 I-131 1.02E+01 8.75E+00 2.93E+01 ,

MU 06 29701 06/03/96 K-40 1.05E+03 1.37E+02 3.57E+02

l MU 06 29701 06/03/96 Mn-54 -7.68E+00 4.44E+00 1.74E+01 MU 06 29701 06/03/96 Ru-103 -7.71E+00 5.27E400 1.99E+01 MU 06 29701 06/03/96 Ru-106 0.00E+00 5.19E+01 1.91E+02 MU 06 29701 06/03/96 Sb-124 -1.95E+01 1.19E+01 5.04E+01 MU 06 29701 06/03/96 Se-75 -2.17E+00 6.36E+00 2.23E+01 MU 06 29701 06/03/96 Th-232 7.47E+00 2.00E+01 6.96E+01 MU 06 29701 06/03/96 Zn-65 4.70E+00 1.14E+01 4.07E+01 l MU 06 29701 06/03/96 Zr-95 8.73E+00 9.51E+00 3.16E+01 l MU 56 29702 06/03/96 Ag-110M -2.71E+00 7.51E+00 2.83E+01 MU 56 29702 06/03/96 Ba-140 1.02E+01 8.48E+00 2.89E+01 !

MU 56 29702 06/03/96 Be-7 -4.72E+00 4.35E+01 1.57E+02 j MU 56 29702 06/03/96 Ce-141 -4.37E+00 6.34E+00 2.15E+01 MU 56 29702 06/03/96 Ce-144 4.46E+01 2.45E+01 7.64E+01 MU 56 29702 06/03/96 Co-57 3.58E+00 2.99E+00 9.56E+00 MU 56 29702 06/03/96 Co-58 0.49E+00 5.41E+00 1.92E+01 MU 56 29702 06/03/96 Co-60 1.23E+01 5.83E+00 1.82E+01 l MU 56 29702 06/03/96 Cr-51 8.38E+01 4.69E+01~ 1.53E+02 MU 56 29702 06/03/96 Cs-134 1.65E+01 1.10E+01 3.10E+01 MU 56 29702 06/03/96 Cs-137 1.18E+00 5.75E+00 2.13E+01 MU 56 29702 06/03/96 Fe-59 -3.29E+01 1.76E+01 7.55E+01 MU 56 29702 06/03/96 I-131 1.99E+00 7.92E+00 2.78E+01 MU 56 29702 06/03/96 K-40 1.24E+03 1.59E+02 3.79E+02

MU 56 29702 06/03/96 Mn-54 2.06E+00 5.84E+00 2.02E+01 MU 56 29702 06/03/96 Ru-103 -2.95E+00 5.24E+00 1.94E+01 MU 56 29702 06/03/96 Ru-106 5.91E+01 4.82E+01 1.68E+02 MU 56 29702 06/03/96 Sb-124 -6.19E+00 1.16E+01 4.91E+01 MU 56 29702 06/03/96 Se-75 -9.43E+00 5.96E+00 2.21E+01 MU 56 29702 06/03/96 Th-232 -1.17E+01 2.26E+01 8.46E+01 MU 56 29702 06/03/96 Zn-65 -1.17E+01 1.48E+01 5.64E+01 MU 56 29702 06/03/96 Zr-95 3.13E+00 9.05E+00 3.16E+01 MU 09 33077 11/27/96 Ag-110M -2.57E+01 1.82E+01 7.64E+01 MU 09 33077 11/27/96 Ba-140 6.93E+00 2.55E+01 1.02E+02 MU 09 33077 11/27/96 Be-7 -1.01E+02 1.02E+02 4.08E+02 MU 09 33077 11/27/96 Ce-141 -0.70E+00 1.60E+01 5.28E+01 MU 09 33077 11/27/96 Ce-144 5.07E+01 5.10E+01 1.58E+02 MU 09 33077 11/27/96 Co-57 2.06E+00 6.24E+00 2.03E+01 MU 09 33077 11/27/96 Co-58 -2.0BE+01 1.22E+01 5.38E+01 MU 09 33077 11/27/96 Co-60 4.51E+00 1.19E+01 4.85E+01 J

Radioactivity detected (i . e. , Concentration > 3 Std. Deviations).

- - - . . _ - _ _ _ - ~ - . . . , - . - _ _ - - _ _ . . _ . . . _ . - . - -.

l Seabrook Nuclear Power Station l Radiological Environmental Monitoring Data (January - December 1996) l SAMPLE CONC. STD DEV. MDC I TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg) l ..............................................................................

MU 09 33077 11/27/96 Cr-51 7.67E+01 1.20E+02 4.07E+02 MU 09 33077 11/27/96 Cs-134 3.71E+00 1.13E+01 3.76E+01 MU 09 33077 11/27/96 Cs-137 -1.14E+01 1.14E+01 4.96E+01 MU 09 33077 11/27/96 Fe-59 -2.95E+01 3.00E+01 1.47E+02 MU 09 33077 11/27/96 I-131 1.41E+01 3.32E+01 1.16E+02 MU 09 33077 11/27/96 K-40 1.60E+03 3.53E+02 8.83E+02

MU 09 33077 11/27/96 Mn-54 -7.65E+00 1.22E+01 4.82E+01 MU 09 33077 11/27/96 Ru-103 1.65E+01 1.37E+01 4.48E+01 l MU 09 33077 11/27/96 Ru-106 1.92E+02 1.18E+02 3.81E+02 MU 09 33077 11/27/96 Sb-124 -6.46E+01 3.78E+01 1.89E+02 l

MU 09 33077 11/27/96 Se-75 -4.20E+00 1.53E+01 5.44E+01 MU 09 33077 11/27/96 Th-232 6.30E+01 4.87E+01 1.60E+02 MU 09 33077 11/27/96 Zn-65 -1.65E+01 2.63E+01 1.12E+02 MU 09 33077 11/27/96 Zr-95 1.42E+00 1.98E+01 7.50E+01 MU 59 33078 11/27/96 Ag-110M -1.55E+01 1.37E+01 6.0GE+01 i MU 59 33078 11/27/96 Ba-140 0.00E+00 2.51E+01 1.03E+02 l MU 59 33078 11/27/96 Be-7 6.09E+01 9.52E+01 3.35E+02 MU 59 33078 11/27/96 Ce-141 -3.44E+01 1.65E+01 6.13E+01 MU 59 33078 11/27/96 Ce-144 4.93E+01 5.90E+01 1.85E+02 MU 59 33078 11/27/96 Co-57 9.71E+00 7.09E+00 2.14E+01 MU 59 33078 11/27/96 Co-58 -1.73E+01 1.25E+01 5.35E+01 l MU 59 33078 11/27/96 Co-60 1.73E+00 1.30E+01 5.20E+01 l MU 59 33078 11/27/96 Cr-51 -2.28E+01 1.14E+02 4.17E+02 l MU 59 33078 11/27/96 Cs-134 -1.00E+01 1.07E+01 4.22E+01 MU 59 33078 11/27/96 Cs-137 2.01E+01 1.55E+01 5.21E+01 MU 59 33078 11/27/96 Fe-59 1.00E+02 4.36E+01 1.17E+02 MU 59 33078 11/27/96 I-131 -2,38E+01 2.88E+01 1.14E+02

! MU 59 33078 11/27/96 K-40 1.17E+03 3.23E+02. 9.13E+02

l MU 59 33078 11/27/96 Mn-54 1.73E+01 1.31E+01' 4.13E+01 MU 59 33078 11/27/96 Ru-103 -7.37E+00 1.20E+01 4.76E+01 33078 11/27/96 MU 59 Ru-106 -2.19E+02 1.06E+02 4.89E+02 MU 59 33078 11/27/96 Sb-124 5.79E+00 2.78E+01 1.16E+02 MU 59 33078 11/27/96 Se-75 -6.81E+00 1.38E+01 5.08E+01 l MU 59 33078 11/27/96 Th-232 6.38E+01 5.66E+01 1.86E+02 l MU 59 33078 11/27/96 Zn-65 -1.91E+01 2.37E+01 1.05E+02 l MU 59 33078 11/27/96 Zr-95 9.96E+00 1.73E+01 6.27E+01 l

l MU 06 33135 12/03/96 Ag-110M 9.84E+00 1.86E+01 6.72E+01 MU 06 33135 12/03/96 Ba-140 2.10E+01 1.75E+01 5.80E+01 MU 06 33135 12/03/96 Be-7 7.30E+01 8.48E+01 2.97E+02 MU 06 33135 12/03/96 Ce-141 1.12E+01 1.50E+01 4 56E+01 MU 06 33135 12/03/96 Ce-144 -1.12E+01 4.43E+01 1.56E+02 MU 06 33135 12/03/96 Co-57 -1.25E+01 5.84E+00 2.30E+01 MU 06 33135 12/03/96 Co-58 0.25E+00 1. 0 6E+ 03 4.2BE+01 l MU 06 331?5 12/03/96 Co-60 1.70E+01 1.31E+01 4.35E+01

' MU 06 33135 12/03/96 Cr-51 -5.95E+01 8.65E+01 3.46E+02 MU 06 33135 12/03/96 Cs-134 7.33E+00 1.16E+01 4.03E+01 MU 06 33135 12/03/96 Cs-137 1.81E+01 1.31E+01 4.35E+01 MU 06 33135 12/03/96 Fe-59 1.90E+01 2.31E+01 8.71E+01 MU 06 33135 12/03/96 I-131 0.70E+00 1.89E+01 7.05E+01

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC l

TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg) )

)

MU 06 33135 12/03/96 K-40 5.89E+02 3.29E+02 1.07E+03 l MU 06 33135 12/03/96 Mn-54 -0.97E+00 1.15E+01 4.61E+01 '

MU 06 33135 12/03/96 Ru-103 -4.58E+00 1.07E+01 4.38E+01 1

MU 06 33135 12/03/96 Ru-106 -9.05E+01 1.31E+02 5.47E+02 {

MU 06 33135 12/03/96 Sb-124 -3.19E+00 2.30E+01 1.20E+02 -

MU 06 33135 12/03/96 Se-75 1.89E+01 1.58E+01 5.14E+01 '

MU 06 33135 12/03/96 Th-232 -1.34E+02 5.30E+01 2.56E+02 l i MU 06 33135 12/03/96 Zn-65 -4.96E+00 2.03E+01 9.51E+01 MU 06 33135 12/03/96 Zr-95 -1.19E+01 2.16E+01 8.97E+01

.MU 56 33136 12/04/96 Ag-110M 1.87E+01 1.47E+01 4.71E+01 l MU 56 33136 12/04/96 Ba-140 -1.35E+00 1.59E+01 6.86E+01 '

MU 56 33136 12/04/96 Be-7 8.14E+01 7.79E+01 2.61E+02

! MU 56 33136 12/04/96 Ce-141 -6.72E+00 1.22E+01 4.18E+01

? MU 56 33136 12/04/96 Ce-144 2.29E+01 4.53E+01 1.46E+02 MU 56 33136 12/04/96 Co-57 7.53E+00 5.96E+00 1.81E+01 MU 56 33136 12/04/96 Co-58 1.41E+00 8.19E+00 3.18E+01 I i

MU 56 33136 12/04/96 Co-60 4.03E+00 1.34E+01 5.28E+01 l MU 56 33136 12/04/96 Cr-51 -9.21E+01 8.32E+01 3.25E+02 l MU 56 33136 12/04/96 Cs-134 -2.62E+00 1.16E+01 4.44E+01 !

MU 56 33136 12/04/96 Cs-137 -8.30E+00 1.17E+01 4.84E+01 l MU 56 33136 12/04/96 Fe-59 4.67E+01 3.12E+01 9.82E+01 '

MU 56 33136 12/04/96 I-131 -6.56E+00 1.66E+01 6.29E+01 1

, MU 56 33136 12/04/96 K-40 6.53E+02 2.39E+02 6.86E+02 )

MU 56 33136 12/04/96 Mn-54 6.77E+00 8.72E+00 3.05E+01 !

4 MU 56 33136 12/04/96 Ru-103 -4.03E+00 6.54E+00 2.85E+01

, MU 56 33136 12/04/96 Ru-106 -2.13E+01 8.24E+01 3.37E+02

, MU 56 33136 12/04/96 Sb-124 -2.67E+01 2.24E+01 1.21E+02 4 MU 56 33136 12/04/96 Se-75 -1.51E+01 1.22E+01- 4.63E+01

MU 56 33136 12/04/96 Th-232 -2.46E+01 4.21E+01 1.69E+02 4 MU 56 33136 12/04/96 Zn-65 4.04E+00 2.27E+01 8.89E+01 i MU 56 33136 12/04/96 Zr-95 0.30E+00 1.27E+01 5.17E+01 1

1 i

i l

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data j (January - December 1996)

SAMPLE CONC. STD DEV. MDC j TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg) )

. ____________..___ . ________....__________. _ ._____.. ___ ...._____________ j Sediment (SE1 = 0-5 cm, SE2 = 5-10 cm, SE3 = 10-15 cm)

SE1 07 29626 05/24/96 Ag-110M -5.20E+00 1.79E+01 6.73E+01 SE1 07 29626 05/24/96 Ba-140 -1.70E+01 1.74E+01 8.56E+01 SE1 07 29626 05/24/96 Be-7 1.07E+02 9.46E+01 3.21E+02 SE1 07 29626 05/24/96 Ce-141 4.52E+00 1.87E+01 6.15E+01 SE1 07 29626 05/24/96 Ce-144 -4.14E+01 6.02E+01 2.04E+02 SE1 07 29626 05/24/96 Co-57 -4.48E+00 7.52E+00 2.54E+01 l SE1 07 29626 05/24/96 Co-58 -7.98E+00 1.39E+01 5.14E+01 SE1 07 29626 05/24/96 Co-60 1.64E+01 1.33E+01 4.63E+01 SE1 07 29626 05/24/96 Cr-51 -1.11E+02 1.21E+02 4.45E+02 l

SE1 07 29626 05/24/96 Cs-134 1.23E+01 2.94E+01 1.11E+02 SE1 07 29626 05/24/96 Cs-137 1.38E+01 1.16E+01 4.05E+01 i SE1 07 29626 05/24/96 Fe-59 -1.44E+01 4.74E+01 1.85E+02 l

SE1 07 29626 05/24/96 I-131 -7.81E+01 3.61E+01 1.44E+02 f SE1 07 29626 05/24/96 K-40 1.60E+04 6.82E+02 7.03E+02 *

! SE1 07 29626 05/24/96 Mn-54 6.31E+00 1.09E+01 3.77E+01

! SE1 07 29626 05/24/96 Ru-103 1.80E+01 1.17E+01 3.34E+01

( SE1 07 29626 05/24/96 Ru-106 5.85E+01 9.64E+01 3.52E+02 i SE1 07 29626 05/24/96 Sb-124 8.07E+00 8.07E+00 2.19E+01 SE1 07 29626 05/24/96 Se-75 3.49E+00 1.42E+01 4.94E+01 SE1 07 29626 05/24/96 Th-232 3.60E+02 5.33E+01 2.08E+02

SE1 07 29626 05/24/96 Zn-65 -3.95E+00 7.05E+01 2.81E+02 l SE1 07 29626 05/24/96 Zr-95 -1.03E+01 2.41E+01 8.83E+01 l

l SE2 07 29627 05/24/96 Ag-110M 2.72E+01 1.94E+01 6.45E<01 l

SE2 07 29627 05/24/96 Ba-140 1.88E+01 2.12E+01 7.83E+01 SE2 07 29627 05/24/96 Be-7 -5.91E+01 1.33E+02 4.86E+02 SE2 07 29627 05/24/96 Ce-141 4.21E+00 2.21E+01 7.30E+01

! SE2 07 29627 05/24/96 Ce-144 -5.82E+01 6.87E+01 2.35E+02 SE2 07 29627 05/24/96 Co-57 3.97E+00 8.73E+00 2.86E+01 SE2 07 29627 05/24/96 Co-58 2.23E+01 1.27E+01 3.96E+01 SE2 07 29627 05/24/96 Co-60 3.17E+00 1.43E+01 5.54E+01 l SE2 07 29627 05/24/96 Cr-51 -1.85E+02 1.21E+02 4.67E+02 ,

j SE2 07 29627 05/24/96 Cs-134 -4.43E+00 1.31E+01 4.99E+01 i SE2 07 29627 05/24/96 Cs-137 -2.66E+01 1.60E+01 6.51E+01 l SE2 07 29627 05/24/96 Fe-59 8.80E+01 5.63E+01 1.90E+02 l SE2 07 29627 05/24/96 I-131 2.40E+01 4.58E+01 1.59E+02 l SE2 07 29627 05/24/96 K-40 1.68E+04 7.33E+02 5.97E+02 *

! SE2 07 29627 05/24/96 Mn-54 1.11E+01 1.25E+01 4.23E+01 l SE2 07 29627 05/24/96 Ru-103 -5.67E+00 1.18E+01 4.54E+01 l SE2 07 29627 05/24/96 Ru-106 6.10E+00 1.14E+02 4.31E+02 l SE2 07 29627 05/24/96 Sb-124 9.14E+00 1.58E+01 6.72E+01 i SE2 07 29627 05/24/96 Se-75 1.60E+01 1.37E+01 4.41E+01 l

SE2 07 29627 05/24/96 Th-232 2.97E+02 6.27E+01 2.30E+02

SE2 07 29627 05/24/96 Zn-65 -1.59E+01 3.94E+01 1.48E+02 SE2 07 29627 05/24/96 Zr-95 -1.23E+01 2.72E+01 10.0E+01 r

SE3 07 29628 05/24/96 Ag-110M -2.26E+01 1.49E+01 5.95E+01 1 SE3 07 29628 05/24/96 Ba-140 -7.44E+00 1.54E+01 6.94E+01 l SE3 07 29628 05/24/96 Be-7 1.45E+02 9.66E+01 3.19E+02 l

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

1

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE3 07 29628 05/24/96 Ce-141 -2.33E+01 1.89E+01 6.53E+01 i SE3 07 29628 05/24/96 Ce-144 -9.43E+01 6.36E+01 2.21E+02 l SE3 07 29628 05/24/96 Co-57 -4.16E+00 7.92E+00 2.67E+01 SE3 07 29628 05/24/96 Co-58 -2.43E+00 1.20E+01 4.36E+01 l SE3 07 29628 05/24/96 Co-60 -6.75E+00 1.35E+01 5.39E+01 l SE3 07 29628 05/24/96 Cr-51 3.18E+02 1.19E+02 3.69E+02

SE3 07 29628 05/24/96 Cs-134 0.50E+00 2.54E+01 9.57E+01 l SE3 07 29628 05/24/96 Cs-137 1.77E+01 1.12E+01 3.81E+01 l SE3 07 29628 05/24/96 Fe-59 7.74E+00 4.10E+01 1.51E+02 l SE3 07 29628 05/24/96 I-131 5.28E+01 4.00E+01 1.33E+02 l SE3 07 29628 05/24/96 K-40 1.65E+04 6.36E+02 4.93E+02

l SE3 07 29628 05/24/96 Mn-54 -1.35E+01 1.24E+01 4.66E+01 SE3 07 29628 05/24/96 Ru-103 1.10E+01 1.36E+01 4.69E+01 SE3 07 29628 05/24/96 Ru-106 4.20E+01 1.04E+02 3.81E+02 SE3 07 29628 05/24/96 Sb-124 5.90E+00 1.82E+01 7.32E+01 l

SE3 07 29628 05/24/96 Se-75 -3.09E+01 1.50E+01 5.64E+01 SE3 07 29628 05/24/96 Th-232 3.03E+02 5.80E+01 2.01E+02

SE3 07 29628 05/24/96 Zn-65 -3.33E+01 5.14E+01 1.89E+02 SE3 07 29628 05/24/96 Zr-95 4.13E+01 2.30E+01 7.20E+01 l

i l

l l

l

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

___ . - . - - _ _ . - . - .- ~. - - _ ~ ,.- - . - - _ - ~ - - _ _ - ., - - . - -

1 4

l l

Seabrook Nuclear Power Station l Radiological Environmental Monitoring Data ;

l (January - December 1996) ,

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pci/kg)

SE1 08 29629 05/24/96 Ag-110M -2.86E+00 1.54E+01 5.92E+01 SE1 08 29629 05/24/96 Ba-140 -7.40E+00 2.67E+01 1.11E+02 l SE1. 08 29629 05/24/96 Be-7 1.35E+01 1.09E+02 3.92E+02 !

SE1 08 29629 05/24/96 Ce-141 1.11E+01 1.78E+01 5.80E+01 SE1 08 29629 05/24/96 Ce-144 -6.69E+01 5.73E+01 1.99E+02 i

' SE1 08 29629 05/24/96 Co-57 -7.14E+00 7.35E+00 2.53E+01 SE1 08 29629 05/24/96 Co-58 3.49E+01 1.44E+01 4.22E+01 l SE1 06 29629 05/24/96 Co-60 1.22E+01 1.25E+01 4.49E+01 SE1 08 29629 05/24/96 Cr-51 -1.84E+02 1.20E+02 4.57E+02 t l SE1 08 29629 05/24/96 Cs-134 -0.73E+00 1.06E+01 4.04E+01 ;

l SE1 08 29629 05/24/96 Cs-137 -2.10E+00 1.23E+01 4.74E+01 i I SE1 08 29629 05/24/96 Fe-59 -2.39E+01 4.77E+01 1.91E+02 ;

SE1 08 29629 05/24/96 I-131 1.34E+01 3.44E+01 1.22E+02 l SE1 08 29629 05/24/96 K-40 1.60E+04 7.02E+02 6.00E+02

l SE1 08 29629 05/24/96 Mn-54 4.64E+00 1.33E+01 4.66E+01 SE1 08 29629 05/24/96 Ru-103 5.31E+00 1.21E+01 4.34E+01 ;

SE1 08 29629 05/24/96 Ru-106 -1.83E+02 1.22E+02 4.93E+02 j SE1 08 29629 05/24/96 Sb-124 2.62E+01 2.31E+01 8.12E+01 i SE1 08 29629 05/24/96 Se-75 1.26E+00 1.36E+01 4.80E+01 ;

SE1 08 29629 05/24/96 Th-232 2.66E+02 5.57E+01 1.97E+02 * ;

SE1 08 29629 05/24/96 Zn-65 4.13E+01 6.87E+01 2.69E+02 :

SE1 08 29629 05/24/96 Zr-95 -0.46E+00 2.28E+01 8.26E+01 ;

i SE2 08 29630 05/24/96 Ag-110M -4.28E+01 1.98E+01 8.35E+01 (

l SE2 08 29630 05/24/96 Ba-140 -1.56E+01 2.47E+01 1.10E+02 ;

SE2 08 29630 05/24/96 Be-7 1.37E+02 1.14E+02 3.84E+02 SE2 08 29630 05/24/96 Ce-141 -1.25E+00 2.04E+01 6.82E+01 SE2 08 29630 05/24/96 Ce-144 8.22E+01 6.52E+01 2.08E+02 SE2 08 29630 05/24/96 Co-57 1.59E+01 8.40E+00 2.61E+01 SE2 08 29630 05/24/96 Co-58 0.29E+00 1.49E+01 5.34E+01 SE2 08 29630 05/24/96 Co-60 2.08E+01 1.81E+01 6.32E+01 j SE2 08 29630 05/24/96 Cr-51 1.61E+02 1.27E+02 4.26E+02 SE2 08 29630 05/24/96 Cs-134 -4.31E+01 3.06E+01 1.21E+02 SE2- 08 29630 05/24/96 Cs-137 2.90E+00 1.43E+01 5.33E+01 SE2 08 29630 05/24/96 Fe-59 9.48E+01 5.19E+01 1.70E+02 SE2 08 29630 05/24/96 I-131 -3.41E+01 4.60E+01 1.70E+02 SE2 08 29630 05/24/96 K-40 1.63E+04 7.31E+02 6.75E+02

l SE2 08 29630 05/24/96 Mn-54 -4.44E+00 1.25E+01 4.65E+01 SE2 08 29630 05/24/96 Ru-103 -3.25E+01 1.37E+01 5.70E+01 SE2 08 29630 05/24/96 Ru-106 6.55E+01 1.15E+02 4.21E+02 SE2 08 29630 05/24/96 Sb-124 -3.70E+01 2.26E+01 1.21E+02 SE2 08 29630 05/24/96 Se-75 6.91E+00 1.29E+01 4.31E+01 SE2 08 29630 05/24/96 Th-232 2.75E+02 6.63E+01 2.57E+02

SE2 08 29630 05/24/96 Zn-65 -5.37E+01 3.40E+01 1.39E+02 SE2 08 29630 05/24/96 Zr-95 9.96E+00 2.37E+01 8.33E+01 SE3 08 29631 05/24/96 Ag-110M 6.14E+00 1.58E+01 5.54E+01 j SE3 08 29631 05/24/96 Ba-140 -1.78E+01 3.59E+01 1.57E+02 SE3 08 29631- 05/24/96 Be-7 6.50E+01 1.12E+02 3.91E+02 i SE3 08 29631 05/24/96 Ce-141 2.00E+01 2.05E+01 6.59E+01 4 SE3 08 29631 05/24/96 Ce-144 2.52E+01 6.90E+01 2.26E+02

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

, -~ - .-- -- . - . . , - , - . , . . - - _ . .- .- - - - . - -

- - ~._ . . . - - - _ - . - - - _ _ _ - - ._. - -

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE3 08 29631 05/24/96 Co-57 -1.34E+01 8.60E+00 2.98E+01 SE3 08 29631 05/24/96 Co-58 1.35E+01 1.31E+01 4.36E+01 SE3 08 29631 05/24/96 Co-60 -3.90E+01 1.53E+01 6.82E+01 SE3 08 29631 05/24/96 Cr-51 1.19E+01 1.42E+02 4.98E+02 SE3 08 29631 05/24/96 Cs-134 6.10E+01 2.86E+01 1.07E+02 SE3 08 29631 05/24/96 Cs-137 -5.44E+00 1.44E+01 5.45E+01 l SE3 08 29631 05/24/96 Fe-59 0.00E+00 4.69E+01 1.74E+02 l SE3 08 29631 05/24/96 I-131 7.25E+01 3.93E+01 1.27E+02 i SE3 08 29631 05/24/96 K-40 2.00E+04 7.18E+02 6.06E+02

l SE3 08 29631 05/24/96 Mn-54 -5.64E+00 1.18E+01 4.34E+01 l

SE3 08 29631 05/24/96 Ru-103 6.58E+00 1.19E+01 4.20E+01 SE3 08 29631 05/24/96 Ru-106 6.65E+00 1.15E+02 4.29E+02 SE3 08 29631 05/24/96 Sb-124 -1.74E+01 2.04E+01 9.42E+01 SE3 08 29631 05/24/96 Se-75 -8.69E+00 1.56E+01 5.57E+01 SE3 08 29631 05/24/96 Th-232 1.56E+02 6.68E+01 2.20E+02 SE3 08 29631 05/24/96 Zn-65 -1.14E+02 4.18E+01 1.68E+02 SE3 08 29631 05/24/96 Zr-95 7.88E+01 3.62E+01 1.36E+02 l

l i

l l

I i

l A

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

t

r Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996) ,

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE1 57 29632 05/29/96 Ag-110M 8.32E+00 1.76E+01 6.3CE+01 ,

SE1 57 29632 05/29/96 Ba-140 2.21E+01 2.03E+01 7.11E+01 SE1 57 29632 05/29/96 Be-7 -2.08E+02 1.01E+02 4.09E+02 SE1 57 29632 05/29/96 Ce-141 5.76E+00 1.76E+01 5.79E+01 '

SE1 57 29632 05/29/96 re-144 -1.23E+01 6.41E+01 2.14E+02 SE1 57 29632 05/29/96 Co-57 3.22E+00 8.38E+00 2.74E+01 SE1 57 29632 05/29/96 Co-58 -8.46E+00 1.26E+01 4.79E+01 SE1 57 29632 05/29/96 Co-60 -1.11E+00 1.51E+01 5.93E+01 :

SE1 57 29632 05/29/96 Cr-51 2.45E+02 1.09E+02 3.45E+02 SE1 57 29632 05/29/96 Cs-134 6.83E+00 3.15E+01 1.22E+02 i SE1 57 29632 05/29/96 Cs-137 -3.38E+00 1.38E+01 5.30E+01 l SE1 57 29632 05/29/96 Fe-59 -3.66E+01 3.r ,+01 1.65E+02 '

SE1 57 29632 05/29/96 I-131 -1.20E+01 2. < F '01 8.95E+01 SE1 57 29632 05/29/96 K-40 1.37E+04 6.v.s+02 6.37E+02

SE1 57 29632 05/29/96 Mn-54 -2.73E+00 1.14E+01 4.24E+01 SE1 57 29632 05/29/96 Ru-103 1.66E+00 1.23E+01 4.47E+01 SE1 57 29632 05/29/96 Ru-106 -1.16E+02 1.18E+02 4.71E+02 i SE1 57 29632 05/29/96 Sb-124 3.70E+01 2.01E401 5.45E+01 SE1 57 29632 05/29/96 Se-75 0.00E+00 1.32E+01 ]

4.67E+01 ;

SE1 57 29632 05/29/96 Th-232 3.32E+02 5.71E+01 2.13E+02

l SE1 57 29632 05/29/96 Zn-65 -3.34E+00 6.34E+01 2.45E+02 SE1 57 29632 05/29/96 Zr-95 4.74E+01 2.52E+01 7.82E+01 {

SE2 57 29633 05/29/96 Ag-110M -1.84E+01 1.84E+01 7.37E+01 i SE2 57 29633 05/29/96 Ba-140 -1.22E+01 1.93E+01 8.58E+01 i SE2 57 29633 05/29/96 Be-7 -4.?9E+01 1.04E+02 3.88E+02 SE2 57 29633 05/29/96 Ce-141 45E+01 1.90E+01 6.51E+01 SE2 57 29633 05/29/96 Ce-144 3.73E+01 7.29E+01 2.38E+02 SE2 57 29633 05/29/96 Co-57 -2.32E+00 8.55E+00_ 2.87E+01 SE2 57 29633 05/29/96 Co-58 -2.53E+00 1.36E+01 4.99E+01 SE2 57 29633 05/29/96 Co-60 -2.06E+01 1.54E+01 6.71E+01 SE2 57 29633 05/29/96 Cr-51 -8.43E+01 1.17E+02 4.33E+02 SE2 57 29633 05/29/ 9 t' Cs-134 -7.73E+00 1.17E+01 4.60E+01 SE2 57 29633 05/29/96 Cs-137 2.95E+00 1.45E+01 5.42E+01 SE2 57 29633 05/29/96 Fe-59 2.08E+01 4.64E+01 1.73E+02 SE2 57 29633 05/29/96 I-131 3.56E+01 3.19E+01 1.08E+02 SE2 57 29633 05/29/96 K-40 1.54E+04 7.23E+02 7.39E+02

SE2 57 29633 05/29/96 Mn-54 -0.74E+00 1.12E+01 4.16E+01 SE2 57 29633 05/29/96 Ru-103 5.35E+00 1.27E+01 4.55E+01 SE2 57 29633 05/29/96 Ru-106 1.66E+02 1.18E+02 4.05E+02 SE2 57 29633 05/29/96 Sb-124 8.17E+00 2.68E+01 1.08E+02 SE2 57 29633 05/29/96 Se-75 9.80E+00 1.31E+01 4.30E+01 SE2 57 29633 05/29/96 Th-232 3.47E+02 7.01E+01 2.37E+02

SE2 57 29633 05/29/96 Zn-65 -2.40E+01 7.25E+01 2.89E+02 SE2 57 29633 05/29/96 Zr-95 -2.26E+01 2.51E+01 9.55E+01 SE3 57 29634 05/29/96 Ag-110M 1.37E+01 1.76E+01 6.1?E+01 SE3 57 29634 05/29/96 Ba-140 3.10E+01 1.77E+01 5.44E+01 SE3 57 29634 05/29/96 Be-7 2.47E+01 9.73E+01 3.48E+02 SE3 57 29634 05/29/96 Ce-141 5.08E+00 1.80E+01 5.92E+01 SE3 57 29634 05/29/96 Ce-144 8.23E+00 6.73E+01 2.22E+02 l l

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE3 57 29634 05/29/96 c 27 -1.53E+01 7.82E+00 2.74E+01 SE3 57 29634 05/29/96 .#-58 -2.76E+00 1.37E+01 4.95E+01 SE3 57 29634 05/29/96 Co-60 -1.83E+01 1.39E+01 6.04E+01 SE3 57 29634 05/29/96 Cr-51 9.50E+01 1.10E+02 3.76E+02 SE3 57 29634 05/29/96 Cs-134 -2.85E+00 1.09E+01 4.17E+01 SE3 57 29634 05/29/96 Cs-137 -1.20E+01 1.33E+01 5.2SE+01 SE3 57 29634 05/29/96 Fe-59 -3.84E+01 4.47E+01 1.82E+02 SE3 57 29634 05/29/96 I-131 5.68E+00 2.41E+01 8.59E+01 SE3 57 29634 05/29/96 K-40 1.45E+04 6.60E+02 5.75E+02

SE3 57 29634 05/29/96 Mn-54 -2.12E+00 1.28E+01 4.62E+01 SE3 57 29634 05/29/96 Ru-103 1.14E+00 1.20E+01 4.33E+01 SE3 57 29634 05/29/96 Ru-106 -3.92E+01 1.21E+02 4.62E+02 SE3 57 29634 05/29/96 Sb-124 8.05E+00 1.80E+01 7.48E+01 SE3 57 29634 05/29/96 Se-75 -2.10E+01 1.39E+01 5.18E+01 SE3 57 29634 05/29/96 Th-232 4.32E+02 5.62E+01 2.01E+02

SE3 57 29634 05/29/96 Zn-65 1.38E+02 6.72E+01 2.52E+02 SE3 57 29634 05/29/96 Zr-95 -1.68E+01 2.54E+01 9.36E+01 1

l l

b

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

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

=- _. _ - _ = ., - -- .-

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE ( (pCi/kg)

______________________________________________pCi/kg) (pCi/kg)

SE1 02 29704 06/03/96 Ag-110M SE1 1.77E+01 2.16E+01 7.51E+01 02 29704 06/03/96 Ba-140 -1.73E+01 2.03E+01 8.52E+01 l SE1 02 29704 06/03/96 Be-7 i

SE1 02

-1.79E+02 1.17E+02 4.50E+02 29704 06/03/96 Ce-141 2.06E+01 2.25E+01 7.22E+01

SE1 02 29704 06/03/96 l Ce-144 1.83E+02 8.88E+01 2.76E+02 SE1 02 29704 06/03/96 Co-57 -1.55E+00 1.14EF01 3.75E+01 SE1 02 29704 06/03/96 Co-58 -3.93E+01 1.45E+01 SE1 02 29704 06/03/96 5.99E+01 SE1 Co-60 -3.78E+00 1.44E+01 5.82E+01 '

02 29704 06/03/96 Cr-51 -7.27E+01 1.27E+02 4.55E+02 SE1 02 29704 06/03/96 Cs-134 SE1 9.99E+01 4.11E+01 1.53E+02 02 29704 06/03/96 Cs-137 -4.46E+00 1.52E+01 5.81E+01 SE1 1

02 29704 06/03/96 Fe-59 SE1 3.94E+01 4.67E+01 1.67E+02 02 29704 06/03/96 I-131 -1.04E+01 2.43E+01 8.71E+01 SE1 02 29704 06/03/96 K-40 SE1 1.24E+04 6.47E+02 7.49E+02

02 29704 06/03/96 Mn-54 -9.61E+00 1.45E+01 5.35E+01 SE1 02 29704 06/03/96 Ru-103 i SE1 1.88E+01 1.37E+01 4.57E+01 02 29704 06/03/96 Ru-106 SE1 02

-5.23E+01 1.55E+02 5.81E+02 29704 06/03/96 Sb-124 2.13E+01 2.51E+01 9.22E+01 SE1 02 29704 06/03/96 Se-75 SE1 8.83E+00 1.69E+01 5.54E+01 02 29704 06/03/96 Th-232 SE1 9.83E+02 7.12E+01 2.53E+02

02 29704 06/03/96 Zn-65 -1.36E+02 7.61E+01 3.02E+02 SE1 02 29704 06/03/96 Zr-95 -6.21E+00 2.61E+01 9.38E+01 SE2 02 29705 06/03/96 Ag-110M SE2 02

-2.72E+00 1.68E+01 6.15E+01 29705 06/03/96 Ba-140 -1.04E+00 1.64E+01 6.42E+01 SE2 02 29705 06/03/96 Be-7 SE2 3.06E+01 1.15E+02 4.06E+02 02 29705 06/03/96 Ce-141 1.34E+01 2.21E+01 7.16E+01 SE2 02 29705 06/03/96 Ce-144 1.12E+01 8.17E+01 2.68E+02 SE2 02 29705 06/03/96 Co-57 SE2 0.80E+00 10.0E+00 3.29E+01 02 29705 06/03/96 Co-58 SE2

-1.05E+01 1.26E+01 4.79E+01 i

02 29705 06/03/96 Co-60 l SE2

-9.75E+00 1.52E+01 6.16E+01 02 29705 06/03/96 Cr-51 l SE2

-1.05E+01 1.24E+02 4.39E+02 02 29705 06/03/96 Cs-134 SE2 3.41E+01 3.74E+01 1.39E+02 02 29705 06/03/96 Cs-137 SE2 1.20E+00 1.47E+01 5.46E+01 02 29705 06/03/96 Fe-59 -1.37E+01 4.07E+01 1.56E+02 l SE2 02 29705 06/03/96 SE2 I-131 1.73E+01 2.15E+01 7.35E+01 02 29705 06/03/96 K-40 1.31E+04 6.20E+02 6.45E+02

SE2 02 29705 06/03/96 Mn-54 SE2 1.83E+01 1.59E+01 5.21E+01 02 29705 06/03/96 Ru-103 SE2 7.75E+00 1.34E+01 4.69E+01 02 29705 06/03/96 Ru-106 SE2

-1.38E+02 1.11E+02 4.49E+02 02 29705 06/03/96 Sb-124 SE2 02

-2.89E+01 2.62E+01 1.15E+02 29705 06/03/96 Se-75 -4.29E+01 1.71E+01 6.49E+01 SE2 02 29705 06/03/96 Th-232 7.01E+02 6.31E+01 1.68E+02

CE2 02 29705 06/03/96 SE2 Zn-65 2.34E+01 3.14E+01 1.10E+02 02 29705 06/03/96 Zr-95 -1.71E+01 2.60E+01 9.49E+01 SE3 02 29706 06/03/96 Ag-110M SE3

-2.86E+00 2.23E+01 8.18E+01 l

02 29706 06/03/96 Ba-140 -5.63E+01 2.90E+01 1.22E+02 SE3 02 29706 06/03/96 SE3 Be-7 -7.41E+01 1.12E+02 4.15E+02 02 29706 06/03/96 Ce-141 -5.10E+00 2.28E+01 7.49E+01

{ SE3 02 29706 06/03/96 Ce-144

, 3.00E+01 8.87E+01 2.88E+02

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations),

i l

l l

1 Seabrook Nuclear Power Station i Radiological Environmental Monitoring Data l (January - December 1996) ;

SAMPLE CONC. STD DEV. MDC ,

. - ___ I_____ ___ _ _ ______ ____ ___ __

SE3 02 29706 06/03/96 Co-57 9.98E+00 1.08E+01 3.44E+01 '

SE3 02 29706 06/03/96 Co-58 1.52E+00 1.44E+01 5.08E+01 SE3 02 29706 06/03/96 Co-60 -5.90E+00 1.72E+01 6.80E+01 SE3 02 29706 06/03/96 Cr-51 1.01E+01 1.37E+02 4.77E+02 SE3 02 29706 06/03/96 Cs-134 5.96E+00 1.56E+01 5.65E+01 SE3 02 29706 06/03/96 Cs-137 -5.52E+00 1.87E+01 6.97E+01 SE3 02 29706 06/03/96 Fe-59 4.08E+01 4.34E+01 1.55E+02 SE3 02 29706 06/03/96 I-131 -3.22E+01 2.34E+01 8.74E+01 SE3 02 29706 06/03/96 K-40 1.40E+04 6.75E+02 7.15E+02

SE3 02 29706 06/03/96 Mn-54 -2.26E+01 1.53E+01 5.83E+01 SE3 G2 29706 06/03/96 Ru-103 -2.33E+01 1.38E+01 5.37E+01 SE3 02 29706 06/03/96 Ru-106 -4.09E+01 1.40E+02 5.27E+02 SE3 02 29706 06/03/96 Sb-124 -1.62E+01 3.44E+01 1.41E+02 SE3 02 29706 06/03/96 Se-75 -3.92E+01 1.64E+01 5.92E+01 ,

SE3 02 29706 06/03/96 Th-232 1.14E+03 6.76E+01 2.34E+02 * ;

SE3 02 29706 06/03/96 Zn-65 -4.54E+01 9.02E+01 3.49E+02 SE3 02 29706 06/03/96 Zr-95 -7.78E+00 2.68E+01 9.62E+01 ,

l

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

_ . _ . _ _ . _ _ . _ _ . _ _ _ _ . _ _ _ - _ _ _ _ . _ . . _ _ _ _ . _ . _____m 4

j Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC

i TYPE STA. LSN END DATE NUCLIDE (pci/kg) (pCi/kg) (pCi/kg)

] SE1 52 29707 06/03/96 Ag-110M -6.96E+00 2.40E+01 8.83E+01 SE1 52 29707 06/03/96 Ba-140 -3.82E+01 3.05E+01 1.22E+02 '

l SE1 52 29707 06/03/96 Be-7 -3.81E+01 1.51E+02 5.36E+02 j SE1 52 29707 06/03/96 Ce-141 2.87E+01 2.90E+01 9.22E+01 4

SE1 52 .29707 06/03/96 Ce-144 -1.25E+02 1.13E+02 3.76E+02

SE1 52 29707 06/03/96 Co-57 -2.49E+00 1.38E+01 4.50E+01 1

SE1 52 29707 06/03/96 Co-58 -1.68E+01 1.72E+01 6.33E+01 l SE1 52 29707 06/03/96 Co-60 -5.91E+00 1.84E+01 7.20E+01 !

j SE1 52 29707 06/03/96 Cr-51 3.45E+02 1.75E+02 5.70E+02 i SE1 52 29707 06/03/96 Cs-134 -1.65E+01 1.80E+01 6.78E+01 '

SE1 52 29707 06/03/96 Cs-137 0.00E+00 2.07E+01 7.59E+01 i SE1 52 29707 06/03/96 Fe-59 -2.06E+01 5.28E+01 2.04E+02 j SE1 52 29707 06/03/96 I-131 2.42E+01 3.01E+01 1.02E+02 !

. SE1 52 29707 06/03/96 K-40 1.19E+04 6.42E+02 8.56E+02 *

! SE1 52 29707 06/03/96 Mn-54 -2.07E+01 1.89E+01 6.89E+01 j SE1 52 29707 06/03/96 Ru-103 -1.12E+01 1.74E+^* 6.31E+01 i

i SE1 52 29707 06/03/96 Ru-106- 1.41E+00 1.( .02 6.10E+02 l

i SE1 52 29707 06/03/96 Sb-124 4.06E+01 2 E+01 9.76E+01 '

SE1 52 29707 06/03/96 Se-75 -2.88E+01 ' ,2E+01 6.95E+01 i

SE1 52 29707 06/03/96 Th-232 1.91E+03 d.47E+01 2.60E+02

SE1 52 29707 06/03/96 Zn-65 3.85E+01 9.80E+01 3.71E+02 :

j SE1 52 29707 06/03/96 Zr-95 4.83E+01 3.11E+01 9.94E+01 1 a

SE2 52 29708 06/03/96 Ag-110M 1.28E+01 1.95E+01 6.61E+01 j

SE2 52 29708 06/03/96 Ba-140 -3.86E+01 2.43E+01 9.81E+01 SE2 52 29708 06/03/96 Be-7 2.58E+02 1.33E+02 4.30E+02 SE2 52 29708 06/03/96 Ce-141 1.79E+01 2.76E+01 8.87E+01

, SE2 52 29708 06/03/96 Ce-144 6.51E+01 1.06E+02 3.42E+02 i SE2 52 29708 06/03/96 Co-57 7.92E+00 1.32E+01 4.24E+01 SE2 52 29708 06/03/96 Co-58 -2.53E+01 1.52E+01 5.80E+01 29708 06/03/96

~

SE2 52 Co-60 4.72E+00 1.70E+01 6.34E+01 f SE2 52 29708 06/03/96 Cr-51 -9.93E+01 1.51E+02 5.35E+02 i SE2 52 29708 06/03/96 Cs-134 2.89E+01 1.67E+01 5.65E+01

! SE2 52 29708 06/03/96 Cs-137 -2.27E+00 2.01E+01 7.36E+01 i SE2 52 29708 06/03/96 Fe-59 3.19E+01 3.34E+01 1.17E+02 j SE2 52 29708 06/03/96 I-131 -1.45E+01 2.93E+01 1.04E+02

, SE2 52 29708 06/03/96 K-40 1.19E+04 5.85E+02 7.41E+02

I SE2 52 29708 06/03/96 Mn-54 0.22E+00 1.59E+01 5.53E+01 29708 06/03/96 SE2 52 Ru-103 2.50E+01 1.60E+01 5.28E+01

SE2 52 29708 06/03/96 Ru-106 6.40E+01 1.45E+02 5.21E+02 l SE2 52 29708 06/03/96 -Sb-124 -1.78E+01 2.71E+01 1.12E+02 1 l- SE2 52 29708 06/03/96 Se-75 -4.43E+01 2.11E+01 7.68E+01 l l SE2 52 29708 06/03/96 Th-232 1.54E+03 7.78E+01 2.79E+02

i SE2 52 29708 06/03/96 Zn-65 1.66E+01 8.96E+01 3.40E+02

? SE2 52 29708 06/03/96 Zr-95 3.47E+01 4.33E+01 1.57E+02 SE3 52 29709 06/03/96 Ag-110M 3.19E+01 2.41E+01 8.05E+01 SE3 52 29709 06/03/96 Ba-140 -5.52E+01 2.91E+01 1.23E+02 SE3 52 29709 06/03/96 Be-7 2.94E+02 1.53E+02 4.95E+02 SE3 52 29709 06/03/96 Ce-141 6.86E+01 3.07E+01 9.51E+01 SE3 52 29709 06/03/96 Ce-144 2.22E+01 1.18E+02 3.80E+02 J

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

___ . - _ _ _ ___ _ _ _ . _ ~. - - - . _ _

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE3 52 29709 06/03/96 Co-57 -1.62E+00 1.38E+01 4.51E+01 SE3 52 29709 06/03/96 Co-58 -2.60E+00 1.79E+01 6.29E+01 SE3 52 29709 06/03/96 Co-60 -2.18E+01 1.77E+01 7.40E+01 SE3 52 29709 06/03/96 Cr-51 -3.19E+01 1.75E+02 6.08E+02 SE3 52 29709 06/03/96 Cs-134 -7.60E+00 1.74E+01 6.47E+01 SE3 52 29709 06/03/96 Cs-137 -1.90E+01 1.86E+01 7.17E+01 SE3 52 29709 06/03/96 Fe-59 6.79E+01 5.19E+01 1.78E+02 SE3 52 29709 06/03/96 I-131 4.73E'00 3.33E+01 1.15E+02 SE3 52 29709 06/03/96 K-40 1.27E+04 6.52E+02 7.86E+02

SE3 52 29709 06/03/96 Mn-54 1.15E+01 1.79E+01 6.04E+01 SE3 52 29709 06/03/96 Ru-103 -2.09E+01 1.80E+01 6.66E+01 SE3 52 29709 06/03/96 Ru-106 1.04E+01 1.65E+02 6.05E+02 SE3 52 29709 06/03/96 Sb-124 3.27E+01 3.83E+01 1.36E+02 SE3 52 29709 06/03/96 Se-75 4.63E+01 2.05E+01 6.32E+01 SE3 52 29709 06/03/96 Th-232 1.89E+03 8.57E+01 2.80E+02

SE3 52 29709 06/03/96 Zn-65 8.00E+01 1.04E+02 3.90E+02 SE3 52 29709 06/03/96 Zr-95 2.79E+01 3.26E+01 1.08E+02 1

Radioactivity detected (i . e . , Concentration > 3 Std. Deviations).

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE1 07 33083 11/27/96 Ag-110M -1.49E+01 3.08E+01 1.45E+02 SE1 07 33083 11/27/96 Ba-140 -5.57E+01 3.94E+01 2.78E+02 SE1 07 33083 11/27/96 Be-7 -2.22E+02 1.84E+02 9.04E+02 SE1 07 33083 11/27/96 Ce-141 1.34E+01 4.19E+01 1.41E+02 SE1 07 33083 11/27/96 Ce-144 -3.51E+01 1.38E+02 4.88E+02 SE1 07 33083 11/27/96 Co-57 -2.30E+01 1.89E+01 7.00E+01 SE1 07 33083 11/27/96 Co-58 2.83E+00 1.41E+01 7.01E+01 SE1 07 33083 11/27/96 Co-60 -1.45E+01 3.13E+01 1.49E+02 SE1 07 33083 11/27/96 Cr-51 -2.99E+02 2.28E+02 1.03E+03 SE1 07 33083 11/27/96 Cs-134 -4.77E+01 1.95E+01 1.26E+02 SE1 07 33083 11/27/96 Cs-137 -1.93E+01 3.06E+01 1.36E+02 SE1 07 33083 11/27/96 Fe-59 -2.07E&O1 1.02E+02 4.49E+02 SE1 07 33083 11/27/96 I-131 -8.99E+01 6.14E+01 3.04E+02 SE1 07 33083 11/27/96 K-40 1.90E+04 1.68E+03 1.08E+03

SE1 07 33083 11/27/96 Mn-54 6.41E+00 2.62E+01 1.04E+02 SE1 07 33083 11/27/96 Ru-103 -2.00E+01 2.90E+01 1.27E+02 SE1 07 33083 11/27/96 Ru-106 -3.29E+02 2.32E+02 1.16E+03 SE1 07 33083 11/27/96 Sb-124 -4.27E+01 3.82E+01 2.93E+02 SE1 07 33083 11/27/96 Se-75 -2.00E+00 3.31E+01 1.24E+02 SE1 07 33083 11/27/96 Th-232 6.72E+01 1.07E+02 3.97E+02 SE1 07 33083 11/27/96 Zn-65 -1.26E+02 8.11E+01 3.85E+02 SE1 07 33083 11/27/96 Zr-95 -3.42E+01 4.29E+01 2.05E+02 SE2 07 33084 11/27/96 Ag-110M -2.09E+01 3.04E+01 1.31E+02 l SE2 07 33084 11/27/96 Ba-140 -2.57E+01 2.30E+01 1.77E+02 SE2 07 33084 11/27/96 Be-7 -1.06E+02 1.87E+02 7.61E+02 SE2 07 33084 11/27/96 Ce-141 -1.12E+01 2.90E+01 1.01E+02 SE2 07 33084 11/27/96 Ce-144 6.76E+01 8.84E+01 2.84E+02 SE2 07 33084 11/27/96 Co-57 -7.08E+00 1.28E+01. 4.45E+01 SE2 07 33084 11/27/96 Co-58 -1.76E+01 2.07E+01 9.36E+01 ,

SE2 07 33084 11/27/96 Co-60 -1.06E+01 1.83E+01 9.80E+01 1 SE2 07 33084 11/27/96 Cr-51 -4.39E+02 1.99E+02 9.84E+02 I SE2 07 33084 11/27/96 Cs-134 -5.36E+00 1.65E+01 6.74E+01 SE2 07 33084 11/27/96 Cs-137 3.95E+01 1.86E+01 4.84E+01 l SE2 07 33084 11/27/96 Fe-59 -1.68E+01 8.47E+01 3.59E+02 SE2 07 33084 11/27/96 I-131 9.06E+01 4.23E+01 1.05E+02 1 SE2 07 33084 11/27/96 K-40 1.56E+04 1.32E+03 1.21E+03

SE2 07 33084 11/27/96 Mn-54 -5.35E+00 1.72E+01 7.49E+01 SE2 07 33084 11/27/96 Ru-103 -2.12E+00 1.96E+01 7.96E+01 SE2 07 33084 11/27/96 Ru-106 -1.85E+01 1.40E+02 6.22E+02 SE2 07 33084 11/27/96 Sb-124 0.00E+00 4.36E+01 2.25E+02 SE2 07 33084 11/27/96 Se-75 2.37E+01 2.29E+01 7.65E+01 SE2 07 33084 11/27/96 Th-232 2.96E+02 1.25E+02 3.65E+02 SE2 07 33084 11/27/96 Zn-65 1.84E+01 6.92E+01 2.62E+02 SE2 07 33084 11/27/96 Zr-95 -1.51E+01 4.53E+01 1.81E+02 SE3 07 33085 11/27/96 Ag-110M 2.51E+01 3.40E+01 1.28E+02 SE3 07 33085 11/27/96 Ba-140 0.00E+00 5.48E+01 2.80E+02 SE3 07 33085 11/27/96 Be-7 -5.82E+01 2.48E+02 1.02E+03 l SE3 07 33085 11/27/96 Ce-141 5.40E+00 4.40E+01 1.50E+02 l SE3 07 33085 11/27/96 Ce-144 8.84E+01 1.40E+02 4.57E+02 l

I

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE3 07 33085 11/27/96 Co-57 -6.60E+00 1.64E+01 5.91E+01 SE3 07 33085 11/27/96 Co-58 -6.30E+00 1.e4E+01 9.63E+01 SE3 07 33085 11/27/96 Co-60 2.10E+01 2.79E+01 1.13E+02 SE3 07 33085 11/27/96 Cr-51 1.56E+02 2.58E+02 9.32E+02 SE3 07 33085 11/27/96 Cs-134 -8.67E+00 2.88E+01 1.22E+02 SE3 07 33085 11/27/96 Cs-137 -3.19E+01 3.19E+01 1.50E+02 SE3 07 33085 11/27/96 Fe-59 -7.16E+01 1.26E+02 5.70E+02 SE3 07 33085 11/27/96 I-131 1.65E+01 7.24E+01 2.85E+02 SE3 07 33085 11/27/96 K-40 1.38E+04 1.59E+03 1.87E+03

SE3 07 33085 11/27/96 Mn-54 -1.15E+01 2.36E+01 1.11E+02 SE3 07 33085 11/27/96 Ru-103 3.10E+01 2.67E+01 9.00E+01 SE3 07 33085 11/27/96 Ru-106 0.00E+00 2.54E+02 1.08E+03 SE3 07 33085 11/27/96 Sb-124 -5.02E+01 4.76E+01 3.58E+02 SE3 07 33085 11/27/96 Se-75 -3.78E+01 2.76E+01 1.22E+02 SE3 07 33085 11/27/96 Th-232 2.19E+02 1.38E+02 4.15E+02 l SE3 07 33085 11/27/96 Zn-65 -1.10E+01 8.23E+01 3.48E+02 '

SE3 07 33085 11/27/96 Zr-95 1.05E+02 5.68E+01 1.53E+02

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

- - - - - _ _ - _ - _ _ . ~ . _ . . - . - , . , , - . - ~ ~ , . _ . , -~. _ - . . . ~- ~

i i

Seabrook Nuclear Power Station i Radiological Environmental Monitoring Data I (January - December 1996)

SAMPLE CONC. STD DEV. MDC !

TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

, SE1 08 33086 11/27/96 Ag-110M 3.90E+01 3.73E+01 1.26E+02 l SE1 08 33086 11/27/96 Ba-140 -1.82E+01 4.58E+01 2.42E+02 l SE1 08 33086 11/27/96 Be-7 -2.04E+02 2.38E+02 1.00E+03 l SE1 08 33086 11/27/96 Ce-141 4.43E+01 4.08E+01 1.27E+02 l SE1 08 33086 11/27/96 Ce-144 7.64E+01 1.13E+02 3.72E+02 ,

i SE1 08 33086 11/27/96 Co-57 -1.72E+01 1.40E+01 5.38E+01 !

SE1 08 33086 11/27/96 Co-58 -3.69E+01 3.59E+01 1.51F+02 !

l SE1 08 33086 11/27/96 Co-60 6.33E+00 2.30E+01 1.02E+02 l SE1 08 33086 11/27/96 Cr-51 3.69E+02 2.72E+02 8.77E+02 SE1 08 33086 11/27/96 Cs-134 1.56E+01 2.60E+01 9.12E+01 l l SE1 08 33086 11/27/96 Cs-137 1.68E+01 2.06E+01 7.82E+01 SE1 08 33086 11/27/96 Fe-59 -1.22E+02 7.91E+01 4.25E+02 SE1 08 33086 11/27/96 I-131 -3.75E+01 6.08E+01 2.65E+02 SE1 08 33086 11/27/96 K-40 1.65E+04 1.45E+03 9.35E+02

SE1 08 33086 11/27/96 Mn-54 -9.49E+00 2.49E+01 1.05E+02 SE1 08 33086 11/27/96 Ru-103 3.46E+01 2.00E+01 5.57E+01 SE1 08 33086 11/27/96 Ru-106 2.86E+02 2.68E+02 9.38E+02 SE1 08 33086 11/27/96 Sb-124 0.00E+00 4.98E+01 2.55E+02 l SE1 08 33086 11/27/96 Se-75 -1.70E+01 2.76E+01 1.10E+02 l

SE1 08 33086 11/27/96 Th-232 3.17E+02 1.22E+02 3.94E+02 SE1 08 33086 11/27/96 Zn-65 -6.73E+01 7.14E+01 3.19E+02 SE1 08 33086 11/27/96 Zr-95 3.83E+01 5.05E+01 1.79E+02 SE2 08 33087 11/27/96 Ag-110M -2.23E+01 2.92E+01 1.56E+02 l SE2 08 33087 11/27/96 Ba-140 1.76E+01 7.98E+01 3.51E+02 SE2 08 33087 11/27/96 Be-7 -1.39E+02 2.71E+02 1.14E+03 SE2 08 33087 11/27/96 Ce-141 2.46E+01 3.63E+01 1.21E+02 SE2 08 33087 11/27/96 Ce-144 8.88E+00 1.13E+02 4.03E+02 SE2 08 33087 11/27/96 Co-57 -1.65E+01 1.54E+01 5.90E+01 SE2 08 33087 11/27/96 Co-58 3.18E+01 3.06E+01 1.05E+02 SE2 08 33087 11/27/96 Co-60 1.80E+01 4.77E+01 1.94E+02 SE2 08 33087 11/27/96 Cr-51 -1.93E+02 2.90E+02 1.19E+03 SE2 08 33087 11/27/96 Cs-134 4.27E+01 3.81E+01 1.03E+02 I SE2 08 33087 11/27/96 Cs-137 -9.36E+00 2.47E+01 1.18E+02 SE2 08 33087 11/27/96 Fe-59 -1.02E+02 1.39E+02 6.36E+02 SE2 08 33087 11/27/96 I-131 -2.16E+01 8.13E+01 3.36E+02 SE2 08 33087 11/27/96 K-40 1.61E+04 1.75E+03 1.76E+03

SE2 08 33087 11/27/96 Mn-54 4.57E+01 3.38E+01 1.07E+02 SE2 08 33087 11/27/96 Ru-103 1.09E+01 3.47E+01 1.33E+02 SE2 08 33087 11/27/96 Ru-106 0.00E+00 3.00E+02 1.24E+03 SE2 08 33087 11/27/96 Sb-124 -9.74E+01 1.02E+02 5.46E+02 SE2 08 33087 11/27/96 Se-75 9.13E+00 2.48E+01 9.43E+01 SE2 08 33087 11/27/96 Th-232 2.84E+02 1.21E+02 5.02E+02 SE2 08 33087 11/27/96 Zn-65 4.45E+01 9.94E+01 3.78E+02 l SE2 08 33087 11/27/96 Zr-95 -2.87E+01 3.77E+01 2.01E+02 SE3 08 33088 11/27/96 Ag-110M 1.14E+01 3.30E+01 1.34E+02 SE3 08 33088 11/27/96 Ba-140 -2.23E+01 5.62E+01 2.97E+02 SE3 08 33088 11/27/96 Be-7 -2.41E+02 1.84E+02 9.05E+02 SE3 08 33088 11/27/96 Ce-141 3.20E+01 3.96E+01 1.27E+02 i SE3 08 33088 11/27/96 Ce-144 -1.61E+02 1.27E+02 4.82E+02 l

I

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l l

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (

_____________________________________________________________________pCi/kg)

SE3 08 33088 11/27/96 Co-57 1.00E+00 1.50E+01 5.19E+01 SE3 08 33088 11/27/96 Co-58 4.02E+01 2.84E+01 8.77E+01 SE3 08 33088 11/27/96 Co-60 -1.53E+01 5.08E+01 2.16E+02 SE3 08 33088 11/27/96 Cr-51 1.09E+01 2.16E+02 SE3 08 8.49E+02 33088 11/27/96 Cs-134 -7.89E+00 2.43E+01 9.93E+01 SE3 08 33088 11/27/96 Cs-137 -5.80E+01 2.37E+01 SE3 1.36E+02 08 33088 11/27/96 Fe-59 8.70E+01 8.56E+01 3.07E+02 SE3 08 33088 11/27/96 I-131 -9.00E+01 7.95E+01 3.48E+02 SE3 08 33088 11/27/96 K-40 2.01E+04 1.81E+03 1.76E+03

SE3 08 33C88 11/27/96 Mn-54 2.35E+01 3.10E+01 1.10E+02 SE3 08 33088 11/27/96 Ru-103 5.86E+01 3.17E+01 9.21E+01 SE3 08 33088 11/27/96 Ru-106 -8.18E+01 1.83E+02 8.80E+02 SE3 08 33088 11/27/96 Sb-124 -4.57E+01 4.34E+01 3.26E+02 SE3 08 33088 11/27/96 Se-75 -2.52E+01 2.90E+01 1.18E+02 SE3 08 33088 11/27/96 Th-232 5.90E+02 1.76E+02 4.30E+02

SE3 08 33088 11/27/96 Zn-65 6.36E+01 7.24E+01 2.61E+02 SE3 06 33088 11/27/96 Zr-95 -1.97E+01 1.71E+01 1.33E+02 i

)

l 1

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

e

f Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE ( (pCi/kg)

______________________________________________pCi/kg) (pCi/kg)

SE1 57 33089 11/27/96 Ag-110M SE1 57 5.09E+01 2.64E+01 7.07E+01 33089 11/27/96 Ba-140 -5.62E+01 4.26E+01 2.29E+02 SE1 57 33089 11/27/96 Be-7 SE1 57 1.15E+02 1.85E+02 6.59E+02 33089 11/27/96 Ce-141 -1.16E+01 3.15E+01 1.09E+02 SE1 57 33089 11/27/96 Ce-144 -5.44E+01 1.14E+02 3.91E+02 SE1 57 33089 11/27/96 Co-57 -1.43E+01 1.39E+01 4.92E+01

]

SE1 57 33089 11/27/96 Co-58 j SE1 57 7.01E+00 1.75E+01 6.79E+01 33089 11/27/96 Co-60 1.13E+01 1.92E+01 7.63E+01 SE1 57 33089 11/27/96 Cr-51 1

SE1 57 1.65E+02 1.66E+02 5.65E+02 33089 11/27/96 Cs-134 -3.20E+01 1.70E+01 7.77E+01 i

SE1 57 33089 11/27/96 Cs-137 l SE1 1.20E+00 1.88E+01 7.73E+01 57 33089 11/27/96 Fe-59 J SE1 57 9.62E+00 5.90E+01 2.50E+02 33089 11/27/96 I-131 1.46E+01 6.41E+01 2.35E+02 SE1 57 33089 11/27/96 K-40 SE1 57 1.63E+04 1.30E+03 1.90E+03

33089 11/27/96 Mn-54 3.18E+00 2.35E+01 8.74E+01 l

SE1 57 33089 11/27/96 Ru-103 !

SE1 8.94E+00 2.33E+01 8.55E+01 57 33089 11/27/96 Ru-106 SE1 57

-5.09E+01 1.84E+02 7.65E+02 33089 11/27/96 Sb-124 -2.64E+01 2.37E+01 1,82E+02 SE1 57 33089 11/27/96 SE1 57 Se-75 -2.27E+01 2.55E+01 9.85E+01 33089 11/27/96 Th-232 1.55E+02 9.64E+01 2.96E+02 SE1 57 33089 11/27/96 Zn-65 i SE1 1.57E+01 1.04E+02 4.20E+02 57 33089 11/27/96 Zr-95 -3.64E+01 3.32E+01 1.52E+02 SE2 57 33090 11/27/96 Ag-110M SE2 8.29E+01 4.92E+01 1.41E+02 57 33090 11/27/96 Ba-140 SE2

-4.50E+01 4.03E+01 3.09E+02 57 33090 11/27/96 SE2 57 Be-7 -1.75E+02 1.64E+02 8.79E+02 33090 11/27/96 Ce-141 5.95E+00 4.57E+01 1.57E+02 SE2 57 33090 11/27/96 Ce-144 SE2

-1.56E+02 1.20E+02 4.83E+02 57 33090 11/27/96 Co-57 SE2 57

-2.91E+01 2.05E+01 7.74E+01 33090 11/27/96 Co-58 -1.39E+01 2.86E+01 1.34E+02 SE2 57 33090 11/2'/96 Co-60 SE2 0.00E+00 2.62E+01 1.36E+02 57 33090 11/27/96 Cr-51 SE2 1.98E+02 3.19E+02 1.14E+03 57 33090 11/27/96 SE2 57 Cs-134 -1.67E+01 2.09E+01 1.00E+02 33090 11/27/96 Cs-137 1.17E+01 3.87E+01 1.53E+02 SE2 57 33090 11/27/96 Fe-59 SE2 3.94E+01 1.17E+02 4.85E+02 57 33090 11/27/96 I-131 2.59E+02 SE2 57 1.02E+02 2.57E+02 33090 11/27/96 K-40 1.78E+04 1.91E+03 2.39E+03

SE2 57 33090 11/27/96 Mn-54 SE2 2.21E+01 3.01E+01 1.10E+02 57 33090 11/27/96 Ru-103 -2.09E+01 SE2 57 3.39E+01 1.47E+02 33090 11/27/96 Ru-106 9.87E+01 1.71E+02 7.26E+02 SE2 57 33090 11/27/96 Sb-124 SE2

-5.53E+01 5.24E+01 3.93E+02 57 33090 11/27/96 Se-75 SE2 4.02E+01 3.87E+01 1.29E+02 57 33090 11/27/96 Th-232 3.67E+02 SE2 1.72E+02 5.44E+02 57 33090 11/27/96 Zn-65 5.57E+01 1.84E+02 7.48E+02 SE2 57 33090 11/27/96 Zr-95 -5.96E+00 4.58E+01 2.09E+02 SE3 57 33091 11/27/96 Ag-110M SE3 2.01E+01 3.11E+01 1.19E+02 57 33091 11/27/96 Ba-140 SE3

-3.52E+01 3.15E+01 2.42E+02 57 33091 11/27/96 Be-7 0.00E+00 2.26E+02 9.12E+02 SE3 57 33091 11/27/96 Ce-141 SE3 5.41E+00 3.88E+01 1.34E+02 57 33091 11/27/96 Ce-144 -3.54E+01 1.39E+02 4.92E+02

)

Radioactivity detected (i.e.,

Concentration > 3 Std. Deviations).

. ~ , , . + +

4 Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE3 57 33091 11/27/96 Co-57 1.10E+00 1.86E+01 6.33E+01 SE3 57 33091 11/27/96 Co-58 0.00E+00 2.62E+01 1.11E+02 SE3 57 33091 11/27/96 Co-60 -1.10E+01 2.33E+01 1.24E+02 SE3 57 33091 11/27/96 Cr-51 -1.04E+02 2.44E+02 9.98E+02 SE3 57 33091 11/27/96 Cs-134 -4.01E+00 2 18E+01 9.02E+01 SE3 57 33091 11/27/96 Cs-137 6.50E+00 2.64E+01 1.09E+02 SE3 57 33091 11/27/96 Fe-59 4.18E+01 7.08E+01 2.95E+02 SE3 57 33091 11/27/96 I-131 -4.75E+01 9.61E+01 3.84E+02 SE3 57 33091 11/27/96 K-40 1.40E+04 1.44E+03 1.08E+03

SE3 57 33091 11/27/96 Mn-54 5.18E+00 2.29E+01 9.40E+01 SE3 57 33091 11/27/96 nu-103 -2.26E+01 1.89E+01 1.02E+02 SE3 57 33091 11/27/96 Ru-106 -6.22E+01 2.45E+02 1.07E+03 SE3 57 33091 11/27/96 Sb-124 1.72E+01 5.24E+01 2.55E+02 SE3 57 33091 11/27/96 Se-75 -1.60E+01 2.83E+01 1.15E+02 SE3 57 33091 11/27/96 Th-232 1.53E+02 1.30E+02 4.32E+02 SE3 57 33091 11/27/96 Zn-65 2.34E+01 5.50E+01 2.17E+02 SE3 57 33091 11/27/96 Zr-95 1.49E+02 6.79E+01 1.78E+02 i

l l

i

Radioactivity detected (i.e., concentration > 3 Std. Deviations).

I Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE TYPE STA. LSN CONC. STD DEV. MDC END DATE NUC (pCi/kg) (pCi/kg)

____________________________________LIDE_________________________________( _________

SE1 02 SE1 33138 12/03/96 Ag-110M -4.93E+01 3 . ~, 0E + 01 02 33138 12/03/96 1.81E+02 SE1 02 Ba-140 -1.56E+01 ?.97E+01 33138 12/03/96 Be-7 2.07E+02 SE1 02 -2.36E+01 2.74E+02 1.06E+03 33138 12/03/96 Ce-141 7.30E+01 SE1 02 33138 12/03/96 6.11E+01 1.86E+02 SE1 Ce-144 -2.32E+02 2.06E+02 02 33138 12/03/96 7.22E+02 SE1 Co-57 5.79E+01 2.89E+01 02 33138 12/03/96 8.37E+01 SE1 Co-58 -5.79E+01 4.19E+01 02 33138 12/03/96 1.79E+02 SE1 Co-60 4.78E+01 3.25E+01 02 33138 12/03/96 9.94E+01 Cr-51 2.35E+02 SE1 02 33138 12/03/96 3.34E+02 1.15E+03 SE1 Cs-134 -2.65E+01 2.73E+01 02 33138 12/03/96 1.17E+02 SE1 Cs-137 6.07E+01 3.45E+01 02 33138 12/03/96 1.07E+02 SE1 Fe-59 -2.27E+01 9.64E+01 02 33138 12/03/96 4.26E+02 I-131 ~7.44E+00 SE1 02 33138 12/03/96 6.55E+01 2.47E+02 SE1 K-40 1.43E+04 1.49E+03 02 33138 12/03/96 Mn-54 1.11E+03

SE1 02 -6.38E+01 3.82E+01 1.69E+02 SE1 33138 12/03/96 Ru-103 1.49E+00 2.94E+01 02 33138 12/03/96 1.16E+02 SE1 Ru-106 -9.51E+01 2.80E+02 02 33138 12/03/96 1.19E+03 SE1 Sb-124 -4.11E+01 3.68E+01 02 33138 12/03/96 Se-75 2.82E+02 SE1 02 7.06E+01 4.27E+01 1.33E+02 SE1 33138 12/03/96 Th-232 1.32E+03 1.89E+02 02 33138 12/03/96 Zn-65 4.82E+02

SE1 02 -1.77E+02 9.59E+01 4.45E+02 33138 12/03/96 Zr-95 1.18E+02 6.77E+01 1.99E+02 SE2 02 SE2 33139 12/03/96 Ag-110M 2.15E+01 3.45E+01 02 33139 12/03/96 1.22E+02 SE2 Ba-140 -1.07E+01 2.69E+01 02 33139 12/03/96 Be-7 1.42E+02 SE2 02 -2.09E+02 1.68E+02 7.22E+02 SE2 33139 12/03/96 Ce-141 3.50E+01 3.24E+01 02 33139 12/03/96 Ce-144 9.95E+01 SE2 02 8.83E+01 1.25E+02 3.93E+02 SE2 33139 12/03/96 Co-57 6.68E+00 1.59E+01 02 33139 12/03/96 Co-58 5.05E+01 SE2 02 1.39E+01 2.32E+01 8.31E+01 SE2 33139 12/03/96 Co-60 -1.01E+01 1.75E+01 02 33139 12/03/96 Cr-51 9.37E+01 SE2 02 -1.0BE+02 1.79E+02 6.92E+02 SE2 33139 12/03/96 Cs-134 2.55E+01 2.01E+01 02 33139 12/03/96 Cs-137 6.42E+01 SE2 02 -4.41E+01 3.02E+01 1.30E+02 SE2 33139 12/03/96 Fe-59 -5.88E+01 7.20E+01 02 33139 12/03/96 I-131 3.31E+02 ;

SE2 02 1.60E+01 4.23E+01 1.51E+02 SE2 33139 12/03/96 K-40 1.12E+04 1.12E+03 02 33139 12/03/96 Mn-54 1.43E+03

SE2 02 1.68E+00 3.20E+01 1.15E+02 SE2 33139 12/03/96 Ru-103 -3.45E+00 2.26E+01 02 33139 12/03/96 Ru-106 8.71E+01 SE2 02 -2.10E+02 1.49E+02 7.42E+02 SE2 33139 12/03/96 Sb-124 -2.83E+01 2.6BE+01 02 33139 12/03/96 Se-75 2.01E+02 SE2 02 -1.84E+01 2.29E+01 8.85E+01 SE2 33139 12/03/96 Th-232 8.88E+02 1.43E+02 02 33139 12/03/96 Zn-65 4.56E+02

SE2 02 1.13E+02 1.36E+02 5.25E+02 33139 12/03/96 Zr-95 -4.23E+01 3.75E+01 1.66E+02 SE3 02 33140 12/03/96 SE3 Ag-110M -4.03E+01 3.63E+01 02 33140 12/03/96 Ba-140 1.95E+02 SE3 02 -6.49E+01 6.49E+01 3.49E+02 SE3 33140 12/03/96 Be-7 -1.10E+02 2.29E+02 02 33140 12/03/96 Ce-141 1.03E+03 SE3 02 -1.45E+01 4.99E+01 1.74E+02 33140 12/03/96 Ce-144 -1.81E+02 1.90E+02 6.89E+02 3

Radioactivity detected (i.e.,

Concentration > 3 Std. Deviations).

. . . _ , . , . .. . , , ~ , ._ _.

l l

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996) l l SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

SE3 02 33140 12/03/96 Co-57 -5.23E+00 2.21E+01 7.72E+01 SE3 02 33140 12/03/96 Co-58 -1.82E+01 2.38E+01 1.27E+02 SE3 02 33140 12/03/96 Co-60 2.05E+01 3.56E+01 1.51E+02 SE3 02 33140 12/03/96 Cr-51 -3.41E+02 3.25E+02 1.34E+03 SE3 02 33140 12/03/96 Cs-134 7.38E+01 4.28E+01 7.76E+01 SE3 02 33140 12/03/96 Cs-137 1.30E+01 2.90E+01 1.21E+02 SE3 02 33140 12/03/96 Fe-59 -3.33E+01 1.10E+02 5.19E+02 SE3 02 33140 12/03/96 I-131 7.19E+01 6.53E+01 2.20E+02 SE3 02 33140 12/03/96 K-40 1.35E+04 1.76E+03 2.41E+03

SE3 02 33140 12/03/96 Mn-54 -4.15E+01 2.08E+01 1.34E+02 SE3 02 33140 12/03/96 Ru-103 0.00E+00 3.44E+01 1.39E+02 SE3 02 33140 12/03/96 Ru-106 -1.09E+02 2.43E+02 1.17E+03 SE3 02 33140 12/03/96 Sb-124 -5.73E+01 5.44E+01 4.08E+02 SE3 02 33140 12/03/96 Se-75 5.95E+00 4.13E+01 1.52E+02 SE3 02 33140 12/03/96 Th-232 3.70E+02 2.12E+02 6.96E+02 SE3 02 33140 12/03/96 Zn-65 3.54E+01 7.71E+01 3.14E+02 SE3 02 33140 12/03/96 Zr-95 5.34E+01 6.64E+01 2.36E+02 i

l I

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l l l

i Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE l TYPE STA. CONC. STD DEV. MDC LSN END DATE NUCLIDE !

______________________________________________(pCi/kg) (pCi/kg) (pCi/kg)

{

SE1 52 33141 12/04/96 Ag-110M 1.36E+01 SE1 52 33141 12/04/96 2.46E+01 8.31E+01 SE1 Ba-140 -2.51E+01 2.72E+01 52 33141 12/04/96 Be-7 1.14E+02 l SE1 52 1.50E+02 1.67E+02 5.51E+02 SE1 33141 12/04/96 Ce-141 -8,58E+00 3.43E+01 52 33141 12/04/96 Ce-144 1.08E+02 SE1 52 6.95E+01 1.34E+02 4.11E+02 SE1 33141 12/04/96 Co-57 1.47E+01 1.66E+01 52 33141 12/04/96 Co-58 5.03E+01 SE1 52 -5.73E+00 1.97E+01 7.04E+01 SE1 33141 12/04/96 Co-60 -1.18E+01 1.77E+01 52 33141 12/04/96 Cr-51 7.29E+01 SE1 52 6.87E+01 1.90E+02 6.34E+02 SE1 33141 12/04/96 Cs-134 -8.57E+00 1.93E+01 52 33141 12/04/96 Cs-137 6.70E+01 i SE1 52 1.50E+01 2.38E+01 8.32E+01 SE1 33141 12/04/96 Fe-59 ~4.74E+01 5.21E+01 52 33141 12/04/96 I-131 2.13E+02 ;

SE1 52 7.36E+01 3.91E+01 1.21E+02 33141 12/04/96 K-40 1.32E+04 7.98E+02 l

SE1 52 33141 12/04/96 Mn-54 8.26E+02

l SE1 52 9.39E+00 2.10E+01 7.03E+01 SE1 33141 12/04/96 Ru-103 -7.90E+00 1.90E+01 52 33141 12/04/96 Ru-106 6.84E+01 SE1 52 7.54E+01 1.90E+02 6.76E+02 SE1 33141 12/04/96 Sb-124 1.22E+01 2.04E+01 52 33141 12/04/96 Se-75 8.38E+01 SE1 52 -6.14E+01 2.78E+01 1.00E+02 33141 12/04/96 Th-232 1.72E+03 1.10E+02 SE1 52 33141 12/04/96 Zn-65 3.29E+02

SE1 52 -6.50E+01 4.01E+01 1.59E+02 33141 12/04/96 Zr-95 3.37E+01 4.10E+01 1.33E+02 SE2 52 SE2 33142 12/04/96 Ag-110M 1.50E+01 2.59E+01 52 33142 12/04/96 Ba-140 8.87E+01 SE2 52 3.76E+01 3.35E+01 8.08E+01 SE2 33142 12/04/96 Be-7 -3.14E+02 1.51E+02 52 33142 12/04/96 Ce-141 6.11E+02 SE2 52 -2.72E+01 3.25E+01 1.04E+02 33142 12/04/96 Ce-144 -6.55E+01 1.17E+02 SE2 52 33142 12/04/96 3.74E+02 SE2 Co-57 -9.46E+00 1.51E+01 52 33142 12/04/96 Co-58 4.82E+01 SE2 52 6.84E+00 7. 39E+01 8.15E+01 SE2 33142 12/04/96 Co-60 1.13E+01 2.25E+01 52 33142 12/04/96 Cr-51 8.45E+01 SE2 52 -3.70E+02 1.80E+02 6.77E+02 33142 12/04/96 Cs-134 -2.63E+01 2.06E+01 SE2 52 33142 12/04/96 Cs-137 7.58E+01 SE2 52 -3.51E+00 2.70E+01 9.90E+01 33142 12/04/96 Fe-59 -1.61E+01 6.95E+01 SE2 52 33142 12/04/96 2.65E+02 SE2 52 I-131 -1.47E+00 3.69E+01 1.28E+02 33142 12/04/96 K-40 1.31E+04 9.02E+02 SE2 52 33142 12/04/96 Mn-54 1.01E+03

SE2 52 2.34E+01 2.34E+01 7.56E+01 33142 12/04/96 Ru-103 1.15E+01 2.09E+01 SE2 52 33142 12/04/96 Ru-106 7.09E+01 SE2 52 -2.05E+02 1.73E+02 7.04E+02 33142 12/04/96 Sb-124 1.09E+01 5.56E+01 SE2 52 33142 12/04/96 Se-75 2.15E+02 SE2 52 4.70E+00 2.49E+01 8.37E+01 33142 12/04/96 Th-232 1.54E+03 1.20E+02 SE2 52 33142 12/04/96 Zn-65 3.66E+02

SE2 52 2.15E+02 1.33E+02 4.83E+02 33142 12/04/96 Zr-95 3.83E+01 4.28E+01 1.39E+02 SE3 52 33143 12/04/96 Ag-110M -2.02E+01 3.74E+01 l SE3 52 33143 12/04/96 Ba-140 1.49E+02 l

SE3 52 -5.18E+01 3.54E+01 1.90E+02 33143 12/04/96 Be-7 -4.19E+01 2.04E+02 SE3 52 33143 12/04/96 7.75E+02 SE3 Ce-141 1.43E+01 4.66E+01 1.47E+02 52 33143 12/04/96 Ce-144 6.93E+01 1.88E+02 5.89E+02

Radioactivity detected (i.e.,

Concentration > 3 Std. Deviations).

l l

__._._.____.___._.-_....~__.=~__._...4 , . , , . . _ . , , , . .s. n., _.,. . . ,.... .- _.

1 i i '

4 l

t i

i Seabrook Nuclear Power Station [

] Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) i'

(

___________ __________________________________________.______________pCi/kg) _________ r

)

! SE3 52 33143 12/04/96 Co-57 1.46E+01 2.34E+01 7.24E+01 SE3 52 33143 12/04/96 Co-58 1.99E+01 2.50E+01 8.63E+01 SE3 52 33143 12/04/96 Co-60 -1.89E+01 2.88E+01 1.33E+02

]

SE3 52 33143 12/04/96 Cr-51 1.61E+02 2.71E+02 9.15E+02 SE3 52 33143 12/04/96 Cs-134 2.11E+01 2.64E+01 8.80E+01 i SE3 52 33143 12/04/96 Cs-137 -1.30E+01 4.01E+01 1.53E+02 i SE3. 52 33143 12/04/96 Fe-59 -6.58E+00 8.15E+01 3.34E+02 '

SE3 52 33143 12/04/96 -1.82E+01 I-131 5.44E+01 1.98E+02 :'

SE3 52 33143 12/04/96 K-40 1.14E+04 1.18E+03 1.87E+03

SE3 52 33143 12/04/96 Mn-54 -1.04E+01 SE3 3.26E+01 1.21E+02 52 33143 12/04/96 Ru-103 -3.56E+01 2.93E+01 1.17E+02 SE3 52 33143 12/04/96 Ru-106 -2.17E+02 2.55E+02 1.06E+03 SE3 52 33143 12/04/96 Sb-124 -1.71E+02 9.48E+01 4.54E+02 SE3 52 33143 12/04/96 Se-75 -4.90E+01 3.77E+01 '1.39E+02 '

SE3 52 33143 12/04/96 Th-232 J.95L+03 1.74E+02 6.19E+02 * ;

SE3 52 33143 12/04/96 Zn-65 1.53E+01 1.80E+02 SE3 6.78E+02 !

52 33143 12/04/96 Zr-95 3.0BE+01 5.64E+01 1.95E+02 l l

l i

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

- - - - _ . .-.- ~.- - - -- - - . _ - . - . - - . - - ~ ~ _ . .- . . - . - . -

l l

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg) 1 Food Crop TF 01 30043 06/20/96 Ag-110M 0.40E+00 7.69E+00 2.62E+01 TF 01 30043 06/20/96 Ba-140 -2.44E+00 1.18E+01 4.39E+01

, TF 01 30043 06/20/96 Be-7 -1.67E+01 5.51E+01 1.90E+02 l TF 01 30043 06/20/96 Ce-141 -1.88E+00 9.42E+00 2.77E+01 i TF 01 30043 06/20/96 Ce-144 1.62E+01 3.51E+01 1.00E+02 l TF 01 30043 06/20/96 Co-57 -3.33E+00 4.11E+00 1.24E+01 TF 01 30043 06/20/96 Co-58 -5.66E+00 7.40E+00 2.56E+01 l TF 01 30043 06/20/96 Co-60 0.40E+00 6.50E+00 2.42E+01 ,

! TF 01 30043 06/20/96 Cr-51 4.99E+01 6.56E+01 2.08E+02 1 TF 01 30043 06/20/96 Cs-134 -4.34E+00 8.38E+00 3.07E+01 TF 01 30043 06/20/96 Cs-137 -4.24E+00 6.71E+00 2.60E+01 <

l TF 01 30043 06/20/96 Fe-59 -2.02E+01 2.12E+01 8.27E+01 TF 01 30043 06/20/96 -2.33E+01 ]

I-131 1.68E+01 5.90E+01 j

! TF 01 30043 06/20/96 K-40 1.55E+03 2.03E+02 9.96E+01

TF 01 30043 06/20/96 Mn-54 -3.35E+00 7.42E+00 2.49E+01 '

l TF 01 30043 06/20/96 Ru-103 -6.69E+00 6.91E+00 2.48E+01 '

! TF 01 30043 06/20/96 Ru-106 2.68E+01 6.63E+01 2.36E+02 TF 01 30043 06/20/96 Sb-124 5.35E+00 1.84E+01 6.43E+01 TF 01 30043 06/20/96 Se-75 1.22E+01 8.62E+00 2.63E+01 TF 01 30043 06/20/96 Th-232 5.27E+00 2.88E+01 2.30E+01 TF 01 30043 06/20/96 Zn-65 -9.78E+00 1.51E+01 5.68E+01 TF 01 30043 06/20/96 Zr-95 1.69E+01 1.23E+01 3.62E+01 TF 02 30044 06/20/96 Ag-110M 9.46E+00 9.46E+00 2.91E+01 TF 02 30044 06/20/96 Ba-140 -0.72E+00 1.28E+01 4.76E+01 i TF 02 30044 06/20/96 Be-7 -5.40E+00 5.06E+01 1.75E+02 TF 02 30044 06/20/96 Ce-141 8.17E+00 8.61E+00. 2.42E+01 !

l TF 02 30044 06/20/96 Ce-144 -2.79E+01 3.06E+01 9.27E+01 TF 02 30044 06/20/96 Co-57 1.56E+00 3.86E+00 1.11E+01 i TF 02 30044 06/2C/96 Co-58 -4.60E+00 5.90E+00 2.18E+01 TF 02 30044 06/20/96 Co-60 0.00E+00 7.82E+00 3.07E+01 I TF 02 30044 06/20/96 Cr-51 1.61E+01 6.13E+01 2.00E+02 '

TF 02 30044 06/20/96 Cs-134 -0.93E+00 6.12E+00 2.29E+01 TF 02 30044 06/20/96 Cs-137 4.60E+00 6.89E+00 2.45E+01 TF 02 30044 06/20/96 Fe-59 2.58E+01 2.28E+01 7.44E+01 TF 02 30044 06/20/96 I-131 1.63E+01 1.34E+01 4.18E+01 TF 02 30044 06/20/96 K-40 1.38E+03 2.09E+02 1.08E+02

TF 02 30044 06/20/96 Mn-54 0.62E+00 6.69E+00 2.23E+01 TF 02 30044 06/20/96 Ru-103 8.44E+00 7.04E+00 2.20E+01 TF 02 30044 06/20/96 Ru-106 -9.63E+01 6.95E+01 2.76E+02 l TF 02 30044 06/20/96 Sb-124 -1.16E+01 1.79E+01 7.52E+01 TF 02 30044 06/20/96 Se-75 3.78E+00 7.24E+00 2.33E+01 TF 02 -30044 06/20/96 Th-232 1.65E+01 2.90E+01 2.40E+01 l TF 02 30044 06/20/96 Zn-65 -9.14E+00 1.59E+01 6.03E+01 I TF 02 30044 06/20/96 Zr-95 1.52E+01 1.27E+01 3.81E+01 TF 03 30045 06/20/96 Ag-110M 1.25E+00 7.55E+00 2.56E+01 '

l TF 03 30045 06/20/96 Ba-140 -7.89E+00 9.92E+00 4.17E+01 l TF 03 30045 06/20/96 Be-7 1.01E+02 5.53E+01 1.64E+02 l

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l l

7--g- .---w_.* y -.m--r- w-- -

-w ^T esr----i T=---r -

w a -- e - + - - - - - +

_______.______._m _m~._ -m _ _ .. __ - -_ ._ ,, ,, y , ,. m._ _

l Seabrook Nuclear Power Station 1

( Radiological Environmental Monitoring Data i (January - December 1996)

SAMPLE CONC. STD DEV. MDC

, TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TF 03 30045 06/20/96 Ce-141 7.98E+00 8.18E+00 2.30E+01 TF 03 30045 06/20/96 Ce-144 -6.17E+00 2.90E+01 8.57E+01 l

TF 03 30045 06/20/96 Co-57 -1.21E+00 3.57E+00 1.06E+01 TF 03 30045 06/20/96 Co-58 0.00E+00 6.85E+00 2.28E+01 TF 03 30045 06/20/96 Co-60 6.77E+00 6.77E+00 2.39E+01 TF 03 30045 06/20/96 Cr-51 -1.09E+01 5.29E+01 1.79E+02 TF 03 30045 06/20/96 Cs-134 3.48E+00 6.40E+00 2.26E+01 TF 03 30045 06/20/96 Cs-137 1.39E+01 6.68E+00 2.08E+01 l TF 03 30045 06/20/96 Fe-59 -8.46E+00 1.62E+01 6.56E+01 ,

TF 03 30045 06/20/96 I-131 8.41E+00 1.33E+01 4.29E+01 l l

TF 03 30045 06/20/96 K-40 1.68E+03 2.07E+02 9.72E+01

TF 03 30045 06/20/96 Mn-54 -3.72E+00 5.94E+00 2.10E+01 TF 03 30045 06/20/96 Ru-103 9,68E+00 5.93E+00 1.79E+01 TF 03 30045 06/20/96 Ru-106 -8.08E+01 5.46E+01 2.25E+02 l TF 03 30045 06/20/96 Sb-124 -1.50E+01 1.69E+01 7.22E+01 TF 03 30045 06/20/96 Se-75 -1.98E+00 7.13E+00 2.37E+01 TF 03 30045 06/20/96 Th-232 6.42E+01 2.35E+01 5.89E+01 TF 03 30045 06/20/96 Zn-65 -2.35E+01 1.64E+01 6.45E+01 TF 03 30045 06/20/96 Zr-95 2.04E+01 1.32E+01 3.83E+01 1

TF 06 30046 06/20/96 Ag-110M 1.30E+00 7.85E+00 2.6EE+01 l TF 06 30046 06/20/96 Ba-140 -2.02E+01 1.10E+01 5.01E+01 l

TF 06 30046 06/20/96 Be-7 9.24E+01 5.84E+01 1.77E+02

TF 06 30046 06/20/96 Ce-141 7.56E+00 8.28E+00 2.34E+01 l TF 06 30046 06/20/96 Ce-144 3.76E+01 2.96E+01 8.21E+01 TF 06 30046 06/20/96 Co-57 1.71E+00 3.83E+00 1.10E+01 TF 06 30046 06/20/96 Co-58 -4.13E+00 6.60E+00 2.34E+01 TF 06 30046 06/20/96 Co-60 0.00E+00 9.63E+00 3.65E+01 TF 06 30046 06/20/96 Cr-51 -1.94E+01 5.43E+01 1.85E+02 TF 06 30046 06/20/96 Cs-134 -8.14E+00 6.20E+00 2.47E+01 TF 06 30046 06/20/96 Cs-137 -4.45E+00 6.48E+00 2.55E+01 TF 06 30046 06/20/96 Fe-59 1.36E+01 1.79E+01 6.19E+01 TF 06 30046 06/20/96 I-131 -4.66E+00 1.52E+01 5.14E+01 TF 06 30046 06/20/96 K-40 1.41E+03 2.08E+02 1.06E+02 *

, TF 06 30046 06/20/96 Mn-54 4.46E+00 6.37E+00 2.02E+01 TF 06 30046 06/20/96 Ru-103 7.42E+00 6.23E+00 1.95E+01 TF 06 30046 06/20/96 Ru-106 6.53E+01 6.26E+01 2.15E+02 TF 06 30046 06/20/96 Sb-124 1.76E+01 1.75E+01 5.96E+01 TF 06 30046 06/20/96 Se-75 -0.26E+00 7.27E+00 2.40E+01 TF 06 30046 06/20/96 Th-232 3.62E+01 2.78E+01 2.23E+01 TF 06 30046 06/20/96 Zn-65 -2.25E+01 1.59E+01 6.33E+01 TF 06 30046 06/20/96 Zr-95 -4.35E+00 1.07E+01 3.77E+01 TF 02 30555 07/17/96 Ag-110M 1.05E+01 7.15E+00 2.22E+01 l TF 02 30555 07/17/96 Ba-140 -6.41E+00 1.08E+01 4.65E+01 l TF 02 30555 07/17/96 Be-7 -1.56E+01 5.6BE+01 2.03E+02 TF 02 30555 07/17/96 Ce-141 -3.65E+00 8.31E+00 2.71E+01 TF 02 30555 07/17/96 Ce-144 -1.33E+01 2.77E+01 9.07E+01 I t

TF 02 30555 07/17/96 Co-57 -3.98E+00 3.55E+00 1.19E+01 TF 02 30555 07/17/96 Co-58 -0.83E+00 6.45E+00 2.33E+01 TF 02 30555 07/17/96 Co-60 -3.40E+00 7.97E+00 3.20E+01

(

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l l

- - . . .- - _- -. . - - , . . - -.-n, , , m - n. .

. g . _ , - - -

1 Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pci/kg) (pci/kg) i TF 02 30555 07/17/96 Cr-51 -6.08E+01 6.32E+01 2.27E+02 l TF 02 30555 07/17/96 Cs-134 7.00E+00 6.77E+00 2.31E+01 TF 02 30555 07/17/96 Cs-137 1.50E+01 6.79E+00 2.09E+01 TF 02 30555 07/17/96 Fe-59 2.92E+01 2.22E+01 7.27E+01 TF 02 30555 07/17/96 I-131 -2.14E+01 1.60E+01 5.99E+01 TF 02 30555 07/17/96 K-40 2.11E+03 2.21E+02 4.20E+02

TF 02 30555 07/17/96 Mn-54 -5.19E+00 6.27E+00 2.36E+01 TF 02 30555 07/17/96 Ru-103 7.71E+00 7.14E+00 2.33E+01 TF 02 30555 07/17/96 Ru-106 -2.71E+01 6.58E+01 2.47E+02 TF 02 30555' 07/17/96 Sb-124 -4.46E+00 2.10E+01 8.21E+01 TF 02 30555 07/17/96 Se-75 -3.64E+00 7.09E+00 2.49E+01 !

TF 02 30555 07/37/96 Th-232 7.64E+00 2.96E+01 1.03E+02 ;

TF 02 30555 07/.7/96 Zn-65 -3.47E'01 1.64E+01 6.94E+01 TF 02 30555 07/17/96 Zr-95 1.28E+01 1.22E+01 3.92E+01 TF 03 30556 07/17/96 Ag-110M 2.92E+00 1.07E+01 3.71E+01 TF 03 30556 07/17/96 Ba-140 -3.42E+00 1.66E+01 6.43E+01 TF 03 30556 07/17/96 Be-7 1.22E+02 7.7rs 01 2.44E+02 TF 03 30556 07/17/96 Ce-141 1.81E+01 1.14E+01 3.37E+01 TF 03 30556 07/17/96 Ce-144 -3.66E+01 3.81E+01 1.26E+02 TF 03 30556 07/17/96 Co-57 0.14E+00 4.58E+00 1.46E+01 TF 03 30556 07/17/96 Co-58 1.24E+01 8.28E+00 2.56E+01 -

TF 03 30556 07/17/96 Co-60 5.46E+00 7.19E+00 2.56E+01 TF 03 30556 07/17/96 Cr-51 7.00E+01 7.43E+01 2.43E+02 TF 03 30556 07/17/96 Cs-134 -4.41E+00 7.11E+00 2.54E+01 TF 03 30556 07/17/96 Cs-137 -1.26E+00 8.66E+00 3.22E+01 TF 03 30556 07/17/96 Fe-59 1.46E+01 2.69E+01 9.52E+01 TF 03 30556 07/17/96 I-131 3.79E+01 2.40E+01 7.55E+01 TF 03 30556 07/17/96 K-40 1.95E+03 2.46E+02 5.76E+02

TF 03 30556 07/17/96 Mn-54 -8.69E+00 8.25E+00 3.08E+01 TF 03 30556 07/17/96 Ru-103 -1.64E+00 7.92E+00 2.86E+01 TF 03 30556 07/17/96 Ru-106 7.50E+01 7.94E+01 2.73E+02 TF 03 30556 07/17/96 Sb-124 1.14E+01 1.66E+01 6.02E+01 TF 03 30556 07/17/96 Se-75 -7.28E+00 9.32E+00 ' 3.29E+01 TF 03 30556 07/17/96 Th-232 7.53E+00 3.54E+01 1.22E+02 TF 03 30556 07/17/96 Zn-65 2.01E+01 2.33E+01 7.15E+01 TF 03 30556 07/17/96 Zr-95 2.27E+01 1.60E+01 4.99E+01 TF 06 30557 07/17/96 Ag-110M 2.53E+00 9.18E+00 3.31E+01 TF 06 30557 07/17/96 Ba-140 2.87E+01 1.65E+01 4.84E+01 TF 06 30557 07/17/96 Be-7 1.02E+02 6.23E+01 1.95E+02 TF 06 30557 07/17/96 Ce-141 9.43E+00 9.96E+00 3.06E+01 TF 06 30557 07/17/96 Ce-144 -6.73E+00 3.44E+01 1.11E+02 TF 06 30557 07/17/96 Co-57 3.61E+00 4.18E+00 1.29E+01 TF 06 30557 07/17/96 Co-58 -1.17E+01 7.36E+00 3.07E+01 TF 06 30557 07/17/96 Co-60 6.64E+00 9.98E+00 3.64E+01 TF 06 30557 07/17/96 Cr-51 6.29E+01 7.15E+01 2.36E+02

TF 06 30557 07/17/96 Cs-134 3.48E+00 8.09E+00 2.66E+01 TF 06 30557 07/17/96 Cs-137 1.14E+01 8.30E+00 2.77E+01 TF 06 30557 07/17/96 Fe-59 -5.57E+00 2.37E+01 9.49E+01 TF 06 30557 07/17/96 I-131 8.84E+00 2.24E+01 7.65E+01 h

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

._- _ .. . . ~. ~ . - -. , -, ,

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pC1/kg) (pCi/kg)

TF 06 30557 07/17/96 K-40 1.94E+03 2.56E+02 5.36E+02

TF 06 30557 07/17/96 Mn-54 -5.39E+00 6.90E+00 2.69E+01 TF 06 30557 07/17/96 Ru-103 8.76E+00 8.37E+00 2.76E+01 TF 06 30557 07/17/96 Ru-106 1.08E+02 7.09E+01 2.34E+02 TF 06 30557 07/17/96 Sb-124 -1.62E+01 1.89E+01 8.76E+01 TF 06 30557 07/17/96 Se-75 -6.56E+00 8.75E+00 3.12E+01 TF 06 30557 07/17/96 Th-232 1.75E+01 3.49E+01 1.21E+02

, TF 06 30557 07/17/96 Zn-65 -1.69E+01 1.72E+01 7.12E+01 TF 06 30557 07/17/96 Zr-95 2.66E+01 1.32E+01 3.79E+01 TF 02 31127 08/16/96 Ag-110M 1.60E+00 1.25E+01 4.61E+01 TF 02 31127 08/16/96 Ba-140 -2.23E+01 1.52E+01 8.19E+01 TF 02 31127 08/16/96 Be-7 -6.99E+01 5.78E+01 2.49E+02 i TF 02 31127 08/16/96 Ce-141 5.06E+00 1.25E+01 4.00E+01 TF 02 31127 08/16/96 Ce-144 -2.53E+01 3.63E+01 1.26E+02 i TF 02 31127 08/16/96 Co-57 1.05E+00 5.41E+00 1.74E+01

, TF 02 31127 08/16/96 Co-58 -4.77E+00 6.96E+00 3.00E+01 TF 02 31127 08/16/96 Co-60 -6.42E+00 1.02E+01 4.53E+01 TF 02 31127 08/16/96 Cr-51 -2.69E+01 7.91E+01 2.91E+02 TF 02 31127 08/16/96 Cs-134 -1.65E+00 9.21E+00 3.53E+01 TF 02 31127 08/16/96 Cs-137 ~4.05E+00 9.51E+00 3.82E+01 TF 02 31127 08/16/96 Fe-59 -1.91E+01 2.75E+01 1.21E+02 TF 02 31127 08/16/96 I-131 -3.64E+00 3.15E+01 1.11E+02

] TF 02 31127 08/16/96 K-40 2.53E+03 3.36E+02 6.68E+02

TF 02 31127 08/16/96 Mn-54 -2.73E+00 7.93E+00 3.12E+01 TF 02 31127 08/16/96 Ru-103 1.62E+00 8.16E+00 3.02E+01 TF 02 31127 08/16/96 Ru-106 2.28E+01 7.39E+01 2.81E+02 TF 02 31127 08/16/96 Sb-124 2.09E+01 2.25E+01 8.19E+01 TF 02 31127 08/16/96 Se-75 0.72E+00 1.11E+01~ 3.86E+01 TF 02 31127 08/16/96 Th-232 -2.06E+01 3.56E+01 1.41E+02 TF 02 31127 08/16/96 Zn-65 -1.40E+01 2.32E+01 9.42E+01 TF 02 31127 08/16/96 Zr-95 1.02E+01 1.62E+01 5.63E+01 TF 03 31128 08/16/96 Ag-110M 2.79E+01 1.83E+01 5.65E+01 TF 03 31128 08/16/96 Ba-140 -2.92E+01 2.00E+01 1.07E+02 TF 03 31128 08/16/96 Be-7 3.10E+01 1.02E+02 3.66E+02 TF 03 31128 08/16/96 Ce-141 -1.79E+01 1.67E+01 5.85E+01 TF 03 31128 08/16/96 Ce-144 -4.64E+01 4.59E+01 1.65E+02 TF 03 31128 08/16/96 Co-57 -1.22E+00 6.30E+00 2.13E+01 TF 03 31128 08/16/96 Co-58 -1.58E+00 1.12E+01 4.33E+01 TF 03 31128 08/16/96 Co-60 2.47E+01 1.13E+01 2.76E+01 TF 03 31128 08/16/96 Cr-51 2.40E+02 1.28E+02 3.94E+02 TF 03 31128 08/16/96 Cs-134 -6.64E+00 1.17E+01 4.59E+01 TF 03 31128 08/16/96 Cs-137 -1.08E+01 1.20E+01 5.07E+01 TF 03 31128 08/16/96 Fe-59 1.59E+01 2.89E+01 1.13E+02 TF 03 31128 08/16/96 I-131 -2.41E+01 3.41E+01 1.32E+02 TF 03 31128 08/16/96 K-40 2.03E+03 3.32E+02 6.64E+02

TF 03 31128 08/16/96 Mn-54 1.43E+00 8.27E+00 3.21E+01 TF 03 31128 08/16/96 Ru-103 -7.59E+00 1.11E+01 4.47E+01 TF 03 31128 08/16/96 Ru-106 4.57E+01 1.02E+02 3.81E+02 TF 03 31128 08/16/96 Sb-124 -4.75E+00 1.73E+01 9.07E+01

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TF 03 31128 08/16/96 Se-75 1.60E+01 1.47E+01 4.81E+01 TF 03 31128 09/16/96 Th-232 2.76E+01 4.0BE+01 1.46E+02 TF 03 31128 08/16/96 Zn-65 -6.28E+00 2.6BE+01 1.07E+02 TF 03 31128 08/16/96 Zr-95 -2.04E+01 1.99E+01 8.32E+01 TF 06 31129 08/16/96 Ag-110M 5.04E+00 1.71E+01 6.34E+01 TF 06 31129 08/16/96 Ba-140 3.20E+01 2.24E+01 6.57E+01 l TF 06 31129 08/16/96 Be-7 3.98E+01 9.84E+01 3.58E+02 !

TF 06 31129 08/16/96 Ce-141 -8.13E+00 1.87E+01 6.32E+01 TF 06 31129 08/16/96 Ce-144 -4.25E+01 4.62E+01 1.68E+02 TF 06 31129 08/16/96 Co-57 -8.28E+00 6.58E+00 2.38E+01 TF 06 31129 08/16/96 Co-58 -2.85E+00 1.26E+01 5.00E+01 TF 06 31129 08/16/96 Co-60 -8.86E+00 1.21E+01 5.93E+02 TF 06 31129 08/16/96 Cr-51 -6.50E+01 1.07E+02 4.15E+02 TF 06 31129 08/16/96 Cs-134 -7.82E+00 1.25E+01 5.08E+01 TF 06 31129 08/16/96 Cs-137 -3.19E+00 1.46E+01 5.79E+01 TF 06 31129 08/16/96 Fe-59 1.9BE+01 3.6]E+01 1.40E+02 TF 06 31129 08/16/96 I-131 -2.36E+01 3.56E+01 1.39E+02 TF 06 31129 08/16/96 K-40 1.74E+03 4.04E+02 1.04E+03

TF 06 31129 08/16/96 Mn-54 9.48E+00 1.28E+01 4.41E+01 l TF 06 31129 08/16/96 Ru-103 -1.61E+01 1.42E+01 5.82E+01 TF 06 31129 08/16/96 Ru-106 6.00E+01 8.45E+01 3.17E+02 TF 06 31129 08/16/96 Sb-124 -3.93E+01 3.11E+01 1.68E+02 TF 06 31129 08/16/96 Se-75 -2.27E+01 1.53E+01 5.90E+01 ,

TF 06 31129 08/16/96 Th-232 -4.98E+01 4.84E+01 2.05E+02 TF 06 31129 08/16/96 Zn-65 3.98E+01 2.95E+01 9.60E+01 TF 06 31129 08/16/96 Zr-95 -6.52E+00 1.60E+01 7.02E+01 I

i i

1 1

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

I

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC 1 TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

Milk TM 04 27682 01/24/96 Ag-110M -0.22E+00 1.19E+00 4.08E+00 TM 04 l 27682 01/24/96 Ba-140 3.37E+00 2.02E+00 6.43E+00 '

TM 04 27682 01/24/96 Be-7 -1.59E+00 8.11E+00 2.83E+01 TM 04 27682 01/24/96 Ce-141 2.47E+00 1.69E+00 5.31E+00 l TM 04 27682 01/24/96 Ce-144 -5.54E+00 5.46E+00 1.80E+01 {

TM 04 27682 01/24/96 Co-57 -0.54E+00 0.67E+00 2.20E+00 '

TM 04 27682 01/24/96 Co-58 0.47E+00 0.92E+C0 3.09E+00 i TM 04 27682 01/24/96 Co-60 -1.38E+00 1.08E+00 4.13E+00 l TM 04 27682 01/24/96 Cr-51 1.60E+01 9.79E+00 3.22E+01 TM 04 27682 01/24/96 Cs-134 1.37E+00 0.92E+00 3.15E+00 TM 04 27682 01/24/96 Cs-137 2.45E+00 1.19E+00 4.15E+00 TM 04 27682 01/24/96 Fe-59 2.32E+00 3.14E+00 1.08E+01 l TM 04 27682 01/24/96 I-131 -1.09E-02 5.73E-02 0.27E+00 TM 04 27682 01/24/96 K-40 1.39E+03 3.89E+01 4.47E+01

TM 04 27682 01/24/96 Mn-54 0.65E+00 0.84E+00 2.78E+00 TM 04 27682 01/24/96 Ru-103 -0.69E+00 1.05E+00 3.72E+00 TM 04 27682 01/24/96 Ru-106 4.72E+00 8.01E+00 2.83E+01 TM 04 27682 01/24/96 Sb-124 -1.55E+00 1.87E+00 7.17E+00 TM 04 27682 01/24/96 Se-75 -0.84E+00 1.18E+00 4.10E+00 TM 04 27682 01/24/96 Th-232 -1.24E+00 3.29E+00 1.14E+01 TM 04 27682 01/24/96 Zn-65 -3.15E+00 2.15E+00 7.95E+00 TM 04 27682 01/24/96 Zr-95 -2.31E+00 1.56E+00 5.63E+00 TM 09 27683 02/24/96 Ag-110M 0.00E+00 1.66E+00 5.84E+00 TM 09 27683 01/24/96 Ba-140 1.09E+00 2.55E+00 9.13E+00 TM 09 27683 01/24/96 Be-7 -2.07E+01 9.73E+00 3.62E+01 TM 09 27683 01/24/96 Ce-141 -1.46E+00 1.89E+00 6.25E+00 TM 09 27683 01/24/96 Ce-144 -7.40E+00 5.81E+00 1.94E+01 TM 09 27683 01/24/96 Co-57 -7.46E-02 0.74E+00 2.41E+00 TM 09 27683 01/24/96 Co-58 -0.28E+00 1.09E+00 3.80E+00 TM 09 27683 01/24/96 Co-60 1.01E+00 1.27E+00 4.48E+00 TM 09 27683 01/24/96 Cr-51 1.19E+01 1.17E+01 3.91E+01 TM 09 27683 01/24/96 Cs-134 1.59E+00 1.90E+00 5.57E+00 TM 09 27683 01/24/96 Cs-137 2.02E+00 1.21E+00 4.10E+00 TM 09 27683 01/24/96 Fe-59 4.46E+00 4.36E+00 1.51E+01 TM 09 27683 01/24/96 I-131 1.89E-02 4.60E-02 0.17E+00 TM 09 27683 01/24/96 K-40 1.42E+03 4.62E+01 5.63E+01

TM 09 27683 01/24/96 Mn-54 -5.86E-02 0.92E+00 3.19E+00 TM 09 27683 01/24/96 Ru-103 -1.00E+00 1.24E+00 4.43E+00 TM 09 27683 01/24/96 Ru-106 1.36E+01 9.67E+00 3.32E+01 I TM 09 27683 01/24/96 Sb-124 0.40E+00 2.57E+00 9.45E+00 TM 09 27683 01/24/96 Se-75 1.90E+00 1.14E+00 3.57E+00 TM 09 27683 01/24/96 Th-232 1.40E+00 4.42E+00 1.53E+01 TM 09 27683 01/24/96 Zn-65 3.79E+00 2.88E+00 9.58E+00 l TM 09 27683 01/24/96 Zr-95 2.35E+00 1.97E+00 6.38E+00 TM 15 27684 01/24/96 Ag-110M 1.76E+00 1.51E+00 5.07E+00 TM 15 27684 01/24/96 Ba-140 -1.05E+00 2.42E+00 9.19E+00 TM 15 27684 01/24/96 Be-7 -8.19E+00 9. 45E4 00 3.39E+01

Radioactivity detected (i.e., Concentration > 3 Std. Deviations). I

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pC1/kg) (pCi/kg)

TM 15 27684 01/24/96 Ce-141 0.60E+00 1.82E+00 5.87E+00 TM 15 27684 01/24/96 Ce-144 4.04E+00 6.00E+00 1.92E+01 TM 15 27684 01/24/96 Co-57 -0.54E+00 0.77E+00 2.51E+00 I TM , 15 27684 01/24/96 Co-58 -0.65E+00 1.15E+00 4.02E+00 TM 15 27684 01/24/96 Co-60 0.46E+00 1.37E+00 4.92E+00 TM 15 27684 01/24/96 Cr-51 -6.51E+00 1.13E+01 3.96E+01 TM 15 27684 01/24/96 Cs-134 2.69E+00 1.74E+00 4.92E+00 TM 15 27684 01/24/96 Cs-137 2.97E+00 1.30E+00 4.33E+00 TM 15 27684 01/24/96 Fe-59 -1.94E+00 4.07E+00 1.51E+01 TM 15 27684 01/24/96 I-131 -6.59E-02 4.28E-02 0.27E+00 TM 15 27684 01/24/S6 K-40 1.57E+03 4.83E+01 5.86E+01

TM 15 27684 01/24/96 Mn-54 0.57E+00 0.98E+00 3.29E+00 TM 15 27684 01/24/96 Ru-103 -1.43E+00 1.25E+00 4.51E+00 TM 15 27684 01/24/96 Ru-106 -1.81E+01 9.91E+00 3.81E+01 TM 15 27684 01/24/96 Sb-124 -0.79E+00 2.32E+00 8.92E+00 TM 15 27684 01/24/96 Se-75 1.04E+00 1.22E+00 3.92E+00 TM 15 27684 01/24/96 Th-232 2.76E+00 4.20E+00 1.44E+01 TM 15 27684 01/24/96 Zn-65 -2.57E+00 2.76E+00 1.01E+01 TM 15 27684 01/24/96 Zr-95 0.77E+00 1.93E+00 6.49E+00 TM 16 27685 01/24/96 Ag-110M 1.81E+00 1.99E+00 6.74E+00 TM 16 27685 01/24/96 Ba-140 -0.87E+00 2.29E+00 8.98E+00 TM 16 27685 01/24/96 Be-7 2.69E+00 1.10E+01 3.81E+01 TM 16 27685 01/24/96 Ce-141 -2.06E+00 2.15E+00 7.18E+00 TM 16 27685 01/24/96 Ce-144 -0.26E+00 7.12E+00 2.32E+01 TM 16 27685 01/24/96 Co-57 -1.09E+00 0.90E+00 3.01E+00 TM 16 27685 01/24/96 Co-58 -2.84E+00 1.20E+00 4.67E+00 TM 16 27685 01/24/96 Co-60 1.34E+00 1.29E+00 4.53E+00 TM 16 27685 01/24/96 Cr-51 -3.01E+01 1.28E+01 4.76E+01 TM 16 27685 01/24/96 Cs-134 0.43E+00 1.04E+00 3.76E+00 TM 16 27685 01/24/96 Cs-137 6.90E+00 1.64E+00 5.46E+00

TM 16 27685 01/24/96 Fe-59 -6.71E+00 4.73E+00 1.86E+01 TM 16 27685 01/24/96 I-131 8.05E-02 6.30E-02 0.17E+00 TM 16 27685 01/24/96 K-40 1.80E+03 5.84E+01 5.46E+01

TM 16 27685 01/24/96 Mn-54 -1.26E+00 1.20E+00 4.36E+00 TM 16 27685 01/24/96 Ru-103 -2.68E+00 1.33E+00 5.0BE+00 TM 16 27685 01/24/96 Ru-106 -1.90E+01 1.15E+01 4.48E+01 TM 16 27685 01/24/96 Sb-124 1.57E+00 2.51E+00 9.11E+00 TM 16 27685 01/24/96 Se-75 1.39E+00 1.32E+00 4.23E+00 TM 16 27685 01/24/96 Th-232 1.07E+01 4.59E+00 1.44E+01 TM 16 27685 01/24/96 Zn-65 0.31E+00 3.36E+00 1.19E+01 TM 16 27685 01/24/96 Zr-95 -0.59E+00 2.16E+00 7.61E+00 TM 20 27686 01/24/96 Ag-110M 0.65E+00 1.72E+00 6.03E+00 TM 20 27686 01/24/96 Ba-140 -0.85E+00 2.34E+00 9.10E+00 TM 20 27686 01/24/96 Be-7 -5.55E+00 9.20E+00 3.35E+01 TM 20 27686 01/24/96 Ce-141 -0.44E+00 2.03E+00 6.65E+00 TM 20 27686 01/24/96 Ce-144 2.16E+00 6.92E+00 2.24E+01 TM 20 27686 01/24/96 Co-57 -0.73E+00 0.87E+00 2.87E+00 TM 20 27686 01/24/96 Co-58 1.54E+00 1.23E+00 3.99E+00 TM 20 27686 01/24/96 Co-60 3.23E+00 1.40E+00 4.48E+00

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 27686 01/24/96 Cr-51 8.21E+00 1.24E+01 4.19E+01 TM 20 27686 01/24/96 Cs-134 0.30E+00 1.20E+00 4.31E+00 TM 20 27686 01/24/96 Cs-137 0.23E+00 1.36E+00 4.92E+00 TM 20 27686 01/24/96 Fe-59 -6.81E+00 4.85E+00 1.89E+01 TM 20 27686 01/24/96 I-131 -3.31E-02 0.11E+00 0.55E+00 TM 20 27686 01/24/96 K-40 1.34E+03 5.18E+01 6.64E+01

TM 20 27686 01/24/96 Mn-54 -2.53E+00 1.24E+00 4.66E+00 TM 20 27686 01/24/96 Ru-103 0.92E+00 1.38E+00 4.72E+00 TM 20 27686 01/24/96 Ru-106 -3.43E+00 1.03E+01 3.83E+01 TM 20 27686 01/24/96 Sb-124 -1.55E+00 3.14E+00 1.21E+01 TM 20 27686 01/24/96 Se-75 1.10E+00 1.23E+00 3.97E+00 TM 20 27686 01/24/96 Th-232 -4.35E+00 4.68E+00 1.73E+01 TM 20 27686 01/24/96 Zn-65 0.62E+00 3.28E+00 1.15E+01 TM 20 27686 01/24/96 Zr-95 4.50E+00 2.20E+00 6.82E+00 TM 21 27687 01/24/96 Ag-110M 1.00E+00 1.52E+00 5.25E+00 TM 21 27687 01/24/96 Ba-140 0.36E+00 2.29E+00 8.42E+00 TM 21 27687 01/24/96 Be-7 1.93E+01 9,08Et00 2.92E+01 TM 21 27667 01/24/96 Ce-141 -1.97E+00 1.89E+00 6.29E+00 TM 21 27687 01/24/96 Ce-144 -0.96E+00 5.91E+00 1.93E+01 TM 21 27687 01/24/96 Co-57 1.32E+00 0.76E+00 2.37E+00 TM 21 27687 01/24/96 Co-58 -0.93E+00 1.11E+00 3.97E+00 TM 21 27687 01/24/96 Co-60 8.07E-02 1.27E+00 4.66E+00 TM 21 27687 01/24/96 Cr-51 -2.29E+01 1.09E+01 4.00E+01 TM 21 27687 01/24/96 Cs-134 -1.21E+00 1.96E+00 6.0BE+00 TM 21 27687 01/24/96 Cs-137 2.05E+00 1.15E+00 3.90E+00 TM 21 27687 01/24/96 Fe-59 -6.13E+00 4.09E+00 1.59E+01 TM 21 27687 01/24/96 I-131 6.57E-02 0.11E+00 0.34E+00 TM 21 27687 01/24/96 K-40 1.40E+03 4.67E+01' 5.36E+01

TM 21 27687 01/24/96 Mn-54 -0.80E+00 0.96E+00 3.45E+00 TM 21 27687 01/24/96 Ru-103 -2.34E+00 1.11E+00 4.21E+00 TM 21 27687 01/24/96 Ru-106 -1.29E+01 9.80E+00 3.73E+01 TM 21 27687 01/24/96 Sb-124 0.42E+00 2.54E+00 9.35E+00 TM 21 27687 01/24/96 Se-75 -8.15E-02 1.19E+00 3.93E+00 TM 21 27687 01/24/96 Th-232 -4.41E+00 4.29E+00 1.57E+01 TM 21 27687 01/24/96 Zn-65 -7.69E+00 2.73E+00 1.07E+01 TM 21 27687 01/24/96 Zr-95 0.73E+00 1.96E+00 6.63E+00 TM 04 28037 02/21/96 Ag-110M 1.95E+00 1.67E+00 5.63E+00 TM 04 28037 02/21/96 Ba-140 -1.42E+00 1.51E+00 6.44E+00 TM 04 28037 02/21/96 Be-7 5.92E+00 1.00E+01 3.45E+01 TM 04 28037 02/21/96 Ce-141 3.50E+00 1.88E+00 6.09E+00 TM 04 28037 02/21/96 Ce-144 -9.91E+00 6.76E+00 2.27E+01 TM 04 28037 02/21/96 Co-57 0.35E+00 0.85E+00 2.75E+00 TM 04 28037 02/21/96 Co-58 -2.40E+00 1.10E+00 4.28E+00 TM 04 28037 02/21/96 Co-60 -1.81E+00 1.50E+00 5.89E+00 TM 04 28037 02/21/96 Cr-51 0.00E+00 1.15E+01 4.00E+01 TM 04 28037 02/21/96 Cs-134 1.38E+00 1.19E+00 4.15E+00 TM 04 28037 02/21/96 Cs-137 2.58E+00 1.28E+00 4.27E+00 TM 04 28037 02/21/96 Fe-59 -4.59E+00 4.21E+00 1.64E+01 TM 04 28037 02/21/96 I-131 1.10E-02 6.57E-02 0.28E+00

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

.- - - .-~ . . - . . - .

l l Seabrook Nuclear Power Station l Radiological Environmental Monitoring Data

! (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg) l TM 04 28037 02/21/96 K-40 1.24E+03 4.97E+01 6.23E+01

I

! TM 04 28037 02/21/96 Mn-54 0.56E+00 1.08E+00 3.66E+00 l TM 04 28037 02/21/96 Ru-103 -3.41E+00 1.20E+00 4.73E+00 l l TM 04 28037 02/21/96 Ru-106 1.48E+01 9.91E+00 3.39E+01 l I TM 04 28037 02/21/96 Sb-124 -4.47E+00 2.94E+00 1.22E+01 j TM 04 28037 02/21/96 Se-75 0.48E+00 1.27E+00 4.15E+00 i TM 04 28037 02/21/96 Th-232 -6.90E+00 4.58E+00 1.74E+01 TM 04 28037 02/21/96 Zn~65 -5.22E+00 3.11E+00 1.19E+01 TM 04 28037 02/21/96 Zr-95 -0.65E+00 1.99E+00 7.05E+00 l TM 09 28038 02/21/96 Ag-110M 2.24E+00 1.95E+00 6.43E+00 TM 09 28038 02/21/96 Ba-140 -2.14E+00 2.03E+00 8.73E+00 TM 09 28038 02/21/96 Be-7 -3.11E+01 1.26E+01 5.03E+01 TM 09 28038 02/21/96 Ce-141 -7.66E-02 2.43E+00 8.04E+00 TM 09 28038 02/21/96 Ce-144 2.46E+00 9.22E+00 3.02E+01 TM 09 28038 02/21/96 Co-57 -0.78E+00 1.14E+00 3.82E+00 TM 09 28038 02/21/96 Co-58 -2.88E+00 1.48E+00 5.85E+00 TM 09 28038 02/21/96 Co-60 -1.47E+00 1.76E+00 7.07E+00 TM 09 28038 02/21/96 Cr-51 -1.09E+01 1.42E+01 5.16E+01 TM 09 28038 02/21/96 Cs-134 -1.32E+00 1.50E+00 5.82E+00 l TM 09 28038 02/21/96 Cs-137 6.07E+00 1.65E+00 4.17E+00 *

! TM 09 28038 02/21/96 Fe-59 1.14E+00 4.50E+00 1.65E+01 ,

TM 09 28038 02/21/96 I-131 6.07E-02 6.31E-02 0.16E+00 )

TM 09 28038 02/21/96 K-40 1.36E+03 6.43E+01 7.84E+01

TM 09 28038 02/21/96 Mn-54 -0.50E+00 1.24E+00 4.58E+00 TM 09 28038 02/21/96 Ru-103 -2.76E+00 1.58E+00 6.12E+00 TM 09 28038 02/21/96 Ru-106 -2.07E+00 1.25E+01 4.72E+01 TM 09 28038 02/21/96 Sb-124 -7.56E-02 2.96E+00, 1.15E+01 TM 09 28038 02/21/96 Se-75 0.84E+00 1.95E+00 6.69E+00 TM 09 28038 02/21/96 Th-232 4.62E+00 5.82E+00 1.97E+01 TM 09 28038 02/21/96 Zn-65 -7.65E+00 3.82E+00 1.54E+01 TM 09 28038 02/21/96 Zr-95 1.95E+00 2.20E+00 7.42E+00 TM 15 28039 02/21/96 Ag-110M 2.01E+00 1.59E+00 5.16E+00 TM 15 28039 02/21/96 Ba-140 -1.14E+00 2.12E+00 8.14E+00 l TM 15 28039 02/21/96 Be-7 6.83E+00 1.06E+01 3.63E+01 1 TM 15 28039 02/21/96 Ce-141 3.64E+00 2.08E+00 6.51E+00 TM 15 28039 02/21/96 Ce-144 -3.28E+00 7.33E+00 2.43E+01 TM 15 28039 02/21/96 Co-57 0.16E+00 0.99E+00 3.24E+00 TM 15 28039 02/21/96 Co-58 -0.54E+00 1.33E+00 4.72E+00 ,

TM 15 28039 02/21/96 Co-60 -2.05E+00 1.47E+00 5.93E+00 '

TM 15 28039 02/21/96 Cr-51 -0.88E+00 1.25E+01 4.35E+01 TM 15 28039 02/21/96 Cs-134 -0.23E+00 1.24E+00 4.59E+00 i TM 15 28039 02/21/96 Cs-137 2.53E+00 1.39E+00 4.66E+00 TM 15 28039 02/21/96 Fe-59 1.05E+00 4.45E+00 1.59E+01

! TM 15 28039 02/21/96 I-131 0.14E+00 0.11E+00 0.32E+00 l TM 15 28039 02/21/96 K-40 1.58E+03 5.87E+01 6.79E+01

TM 15 28039 02/21/96 Mn-54 0.22E+00 1.20E+00 4.15E+00 TM 15 28039 02/21/96 Ru-103 1.37E+00 1.34E+00 4.54E+00 i

TM 15 28039 02/21/96 Ru-106 -1.29E+01 1.13E+01 4.38E+01 TM 15 28039 02/21/96 Sb-124 2.49E+00 2.24E+00 7.58E+00 l

Radioactivity detected (i . e . , Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 15 28039 02/21/96 Se-75 -1.12E+00 1.58E+00 5.57E+00 TM 15 28039 02/21/96 Th-232 3.00E+00 4.30E+00 1.45E+01 TM 15 28039 02/21/96 Zn-65 1.38E+00 3.23E+00 1.13E+01 TM 15 28039 02/21/96 Zr-95 4.19E+00 2.20E+00 6.86E+00 TM 16 28040 02/21/96 Ag-110M -2.95E+00 1.88E+00 7.57E+00 TM 16 28040 02/21/96 Ba-140 -2.68E+00 2.59E+00 1.07E+01 TM 16 20040 02/21/96 Be-7 5.40E+00 1.19E+01 4.17E+01 TM 16 28040 02/21/96 Ce-141 0.98E+00 2.31E+00 7.53E+00 .

TM 16 28040 02/21/96 Ce-144 -3.45E+00 8.64E+00 2.87E+01 :

TM 16 28040 02/21/96 Co-57 -0.95E+00 1.08E+00 3.63E+00 ;

TM 16 28040 02/21/96 Co-58 2.13E+00 1.53E+00 4.95E+00 '

TM 16 20040 02/21/96 Co-60 -1.12E+00 2.05E+00 7.91E+00 ,

TM 16 20040 02/21/96 Cr-51 -4.50E+00 1.38E+01 4.90E+01 I TM 16 28040 02/21/96 Cs-134 -0.93E+00 1.49E+00 5.61E+00 :

TM 16 28040 02/21/96 Cs-137 5.43E+00 2.10E+00 7.49E+00 ;

TM 16 20040 02/21/96 Fe-59 3.11E+00 5.25E+00 1.90E+01 i 16 78040 02/21/96

~

TM I-131 3.28E-02 6.06E-02 0.19E+00 TM 16 28040 02/21/96 K-40 1.77E+03 7.11E+01 7.26E+01

I TM 16 28040 02/21/96 Mn-54 -1.23E+00 1.32E+00 4.95E+00 l TM 16 28040 02/21/96 Ru-103 -3.24E+00 1.59E+00 6.19E+00 ,

TM 16 28040 02/21/96 Ru-106 8.37E+00 1.25E+01 4.49E+01 '

TM 16 28040 02/21/96 Sb-124 -0.75E+00 3.58E+00 1.41E+01 '

TM 16 28040 02/21/96 Se-75 0.28E+00 1.67E+00 5.56E+00 TM 16 28040 02/21/96 Th-232 0.70E+00 5.97E+00 2.14E+01 ;

TM 16 28040 02/21/96 Zn-65 -5.58E+00 4.36E+00 1.66E+01 l TM 16 28040 02/21/96 Zr-95 1.19E+00 2.39E+00 8.25E+00 TM 20 28041 02/21/96 Ag-110M -5.09E+00 2.30E+00~ 9.20E+00 TM 20 20041 02/21/96 Ba-140 0.51E+00 2.66E+00 9.96E+00 TM 20 20041 02/21/96 Be-7 0.56E+00 1.06E+01 3.83E+01 t TM 20 28041 02/21/96 Ce-141 -0.48E+00 2.19E+DO 7.28E+00 i TM 20 28041 02/21/96 Ce-144 -2.52E+00 7.60E+DO 2.53E+01 i TM 20 28041 02/21/96 Co-57 1.31E+00 1.07E+30 3.41E+00 !

TM 20 28041 02/21/96 Co-58 2.93E+00 1.56E+00 4.87E+00 TM 20 28041 02/21/96 Co-60 2.85E+00 1.63E+00 5.40E+00 TM 20 28041 02/21/96 Cr-51 -1.7BE+01 1.43E+01 5.23E+01 TM 20 20041 02/21/96 Cs-134 -1.82E+00 1.47E+00 5.73E+00 TM 20 28041 02/21/96 Cs-137 2.51E+00 1.42E+00 4.77E+00 TM 20 28041 02/21/96 Fe-59 9.93E+00 4.97E+00 1.62E+01 l TM 20 26141 02/21/96 I-131 2.88E-02 4.56E-02 0.18E+00 1 TM 20 28041 02/21/96 K-40 1.35E+03 6.32E+01 7.60E+01

TM 20 28041 02/21/96 Mn-54 -1.46E+00 1.02E+00 4.14E+00 TM 20 20041 02/21/96 Ru-103 1.10E+00 1.44E+00 4.98E+00 TM 20 28041 02/21/96 Ru-106 6.89E+00 1.42E+01 5.10E+01 TM 20 28041 02/21/96 Sb-124 -1.48E+00 3.46E+00 1.39E+01 TM 20 28041 02/21/96 Se-75 -0.49E+00 1.62E+00 5.47E+00 TM 20 28041 02/21/96 Th-232 4.83E+00 5.98E+00 2.06E+01 TM 20 28041 02/21/96 Zn-65 -2.97E+00 4.07E+00 1.52E+01 TM 20 28041 02/21/96 Zr-95 1.72E+00 2.33E+00 7.90E+00

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data I (January - December 1996)

SAMPLE CONC. STD DEV. MDC i TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg) l ______________________________________________________________________________

l 1

TM 21 20042 02/21/96 Ag-110M -0.20E+00 1.32E+00 4.60E+00 TM 21 28042 02/21/96 Ba-140 -2.35E+00 1.62E+00 6.55E+00 TM 21 28042 02/21/96 Be-7 -5.25E+00 8.08E+00 2.91E+01 i TM 21 2004E 02/21/96 Ce-141 2.42E+00 1.73E+00 5.48E+00 TM 21 28042 02/21/96 Ce-144 -0.22E+00 5.9BE+00 1.95E+01 TM 21 20042 02/21/96 Co-57 -0.76E+00 0.79E+00 2.61E+00 TM 21 20042 02/21/96 Co-58 0.49E+00 1.05E+00 3.52E+00 TM 21 20042 02/21/96 Co-60 0.55E+00 1.13E+00 4.0BE+00 TM 21 28042 02/21/96 Cr-51 -6.11E+00 1.04E+01 3.65E+01 TM 21 28042 02/21/96 Cs-134 -0.50E+00 1.02E+00 3.77E+00 TM 21 28042 02/21/96 Cs-137 0.75E+00 1.09E+00 3.85E+00 TM 21 28040 02/21/96 Fe-59 -0.72E+00 3.25E+00 1.18E+01 TM 21 20042 02/21/96 I-131 -8.06E-03 2.15E-02 0.11E+00 TM 21 98042 02/21/96 K-40 1.37E+03 4.49E+01 5.54E+01

TM 21 28042 02/21/96 Mn-54 0.83E+00 0.99E+00 3.27E+00 j l TM 21 20042 02/21/96 Ru-103 1.19E+00 1.02E+00 3.43E+00

TM 21 28042 02/21/96 Ru-106 -2.27E+01 9.36E+00 3.70E+01 TM 21 28042 02/21/96 Sb-124 1.94E+00 2.01E+00 6.85E+00 TM 21 20042 02/21/96 Se-75 2.53E+00 1.34E+00 4.38E+00 TM 21 28042 02/21/96 Th-232 1.28E+00 3.84E+00 1.31E+01 TM 21 20042 02/21/96 Zn-65 6.34E+00 4.77E+00 1.87E+01 TM 21 28042 02/21/96 Zr-95 0.35E+00 1.68E+00 5.76E+00 TM 04 28468 03/20/96 Ag-110M 5.48E+00 1.86E+00 5.26E+00

TM 04 28468 03/20/96 Ba-140 -0.68E+00 1.81E+00 7.11E+00 i l TM 04 28468 03/20/96 Be-7 -1.99E+01 1.10E+01 4.28E+01 l TM 04 28468 03/20/96 Ce-141 0.22E+00 2.17E+00 7.15E+00 TM 04 28468 03/20/96 Ce-144 -1.25E+01 8.72E+00 2.98E+01 TM 04 28468 03/20/96 Co-57 1.14E+00 1.10E+00 3.51E+00 TM 04 28468 03/20/96 Co-58 1.08E+00 1.21E+00 4.07E+00 TM 04 28468 03/20/96 Co-60 2.13E+00 1.39E+00 4.69E+00 '

1 TM 04 28468 03/20/96 Cr-51 -1.50E+01 1.26E+01 4.62E+01 TM 04 28468 03/20/96 Cs-134 3.15E+00 3.43E+00 1.28E+01 TM 04 28468 03/20/96 Cs-137 0.36E+00 1.57E+00 5.76E+00 l

TM 04 28468 03/20/96 Fe-59 -8.74E+00 4.75E+00 1.91E+01 i TM 04 28468 03/20/96 I-131 5.30E-02 4.65E-02 0.17E+00 TM 04 28468 03/20/96 K-40 1.22E+03 6.05E+01 9.63E+01

TM 04 28468 03/20/96 Mn-54 -0.90E+00 1.30E+00 4.78E+00 TM 04 28468 03/20/96 Ru-103 -0.88E+00 1.30E+00 4.82E+00 TM 04 28468 03/20/96 Ru-106 -1.51E+01 1.34E+01 5.21E+01 l TM 04 28468 03/20/96 Sb-124 0.16E+00 2.85E+00 1.08E+01 TM 04 28468 03/20/96 Se-75 -0.37E+00 1.85E+00 6.47E+00 l TM 04 28468 03/20/96 Th-232 3.01E+00 5.38E+00 1.84E+01 l TM 04 28468 03/20/96 Zn-65 4.15E+00 6.27E+00 2.38E+01 l TM 04 28468 03/20/96 Zr-95 1.02E+00 2.05E+00 7.10E+00 l

l TM 09 28469 03/20/96 Ag-110M 3.33E+00 2.35E+00 7.83E+00

! TM 09 28469 03/20/96 Ba-140 -1.85E+00 2.14E+00 9.25E+00 TM 09 28469 03/20/96 Be-7 -5.79E+00 1.28E+01 4.73E+01 TM 09 28469 03/20/96 Ce-141 -0.34E+00 2.39E+00 7.97E+00 TM 09 28469 03/20/96 Ce-144 -0.87E+00 9.23E+00 3.06E+01 h

Radioactivity detected (i . e . , Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 09 28469 03/20/96 Co-57 0.66E+00 1.17E+00 3.79E+00 TM 09 28469 03/20/96 Co-58 -0.39E+00 1.57E+00 5.73E+00 TM 09 28469 03/20/96 Co-60 -0.20E+00 1.95E+00 7.55E+00 TM 09 28469 03/20/96 Cr-51 2.35E+00 1.44E+01 5.06E+01 TM 09 28469 03/20/96 Cs-134 0.00E+00 2.94E+00 9.08E+00 TM 09 28469 03/20/96 Cs-137 3.25E+00 1.74E+00 5.7BE+00 TM 09 28469 03/20/96 Fe-59 -2.01E+00 5.56E+00 2.16E+01 TM 09 28469 03/20/96 I-131 -1.05E-02 2.32E-02 0.11E+00 TM 09 28469 03/20/96 K-40 1.34E+03 7.09E+01 8.78E+01

TM 09 28469 03/20/96 Mn-54 -1.01E+00 1.37E+00 5.24E+00 TM 09 28469 03/20/96 Ru-103 -3.27E+00 1.50E+00 6.10E+00 TM 09 28469 03/20/96 Ru-106 -1.50E+01 1.31E+01 5.31E+01 TM 09 28469 03/20/96 Sb-124 -3.60E+00 4.03E+00 1.70E+01 TM 09 28469 03/20/96 Se-75 -0.84E+00 1.73E+00 5.98E+00 TM 09 28469 03/20/96 Th-232 -1.14E+01 7.26E+00 2.84E+01 TM 09 28469 03/20/96 Zn-65 0.00E+00 3.99E+00 1.47E+01 TM 09 28469 03/20/96 Zr-95 -0.21E+00 2.34E+00 8.60E+00 TM 15 28470 03/20/96 Ag-110M 6.09E+00 3.14E+00 1.00E+01 TM 15 28470 03/20/96 Ba-140 -1.26E+00 3.37E+00 1.35E+01 TM 15 28470 03/20/96 Be-7 2.00E+00 1.37E+01 5.00E+01 TM 15 28470 03/20/96 Ce-141 0.30E+00 2.64E+00 8.80E+00 TM 15 28470 03/20/96 Ce-144 9.92E+00 1.06E+01 3.42E+01 TM 15 28470 03/20/96 Co-57 -0.64E+00 1.35E+00 4.55E+00 TM 15 28470 03/20/96 Co-58 0.85E+00 1.59E+00 5.64E+00 TM 15 28470 03/20/96 Co-60 4.22E+00 1.98E+00 6.07E+00 TM 15 28470 03/20/96 Cr-51 -1.53E+01 1.57E+01 5.89E+01 TM 15 28470 03/20/96 Cs-134 -0.42E+00 1.83E+00 7.02E+00 TM 15 28470 03/20/96 Cs-137 3.51E+00 2.12E+00' 7.16E+00 TM 15 28470 03/20/96 Fe-59 -9.02E+00 6.33E+00 2.70E+01 TM 15 28470 03/20/96 I-131 -1.49E-02 3.75E-02 0.17E+00 TM 15 28470 03/20/96 K-40 1.38E+03 8.09E+01 8.79E+01

TM 15 28470 03/20/96 Mn-54 -0.56E+00 1.7BE+00 6.63E+00 TM 15 28470 03/20/96 Ru-103 -1.01E+00 1.85E+00 6.98E+00 TM 15 28470 03/20/96 Ru-106 3.59E+01 1.54E+01 4.83E+01 TM 15 28470 03/20/96 Sb-124 -5.31E+00 4.17E+00 1.92E+01 TM 15 28470 03/20/96 Se-75 3.78E+00 2.00E+00 6.20E+00 TM 15 28470 03/20/96 Th-232 -1.14E+00 7.66E+00 2.86E+01 TM 15 28470 03/20/96 Zn-65 8.61E+00 4.43E+00 1.40E+01 TM 15 28470 03/20/96 Zr-95 4.64E+00 2.94E+00 9.35E+00 TM 16 28471 03/20/96 Ag-110M 2.21E+00 1.62E+00 5.39E+00 TM 16 28471 03/20/96 Ba-140 -0.62E+00 1.38E+00 5.60E+00 TM 16 28471 03/20/96 Be-7 -4.04E+00 10.0E+00 3.63E+01 TM 16 28471 03/20/96 Ce-141 -1.84E+00 2.07E+00 7.01E+00 TM 16 28471 03/20/96 Ce-144 -3.76E+00 8.31E+00 2.77E+01 TM 16 28471 03/20/96 Co-57 -5.06E-02 1.06E+00 3.49E+00 TM 16 28471 03/20/96 Co-58 -0.2BE+00 1.20E+00 4.26E+00 TM 16 28471 03/20/96 Co-60 2.49E+00 1.43E+00 4.73E+00 TM 16 28471 03/20/96 Cr-51 -2.71E+00 1.24E+01 4.37E+01 TM 16 28471 03/20/96 Cs-134 0.20E+00 2.61E+00 1.02E+01

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/k

_______________________________________________________________g) (pCi/kg)

TM 16 28471 03/20/96 Cs-137 3.47E+00 1.67E+00 5.93E+00 TM 16 28471 03/20/96 Fe-59 2.16E+00 4.23E+00 1.52E+01-TM 16 28471 03/20/96 I-131 4.87E-03 2.99E-02 0.12E+00 TM 16 28471 03/20/96 K-40 1.78E+03 6.05E+01 5.87E+01

TM 16 28471 03/20/96 Mn-54 1.34E+00 1.17E+00 3.83E+00 TM 16 28471 03/20/96 Ru-103 1.01E+00 1.37E+00 4.70E+00 TM 16 28471 03/20/96 Ru-106 -1.41E+00 1.15E+01 TM 16 4.28E+01 28471 03/20/96 Sb-124 7.04E+00 2.48E+00 6.68E+00 TM 16 28471 03/20/96 Se-75 1.57E+00 1.68E+00 5.66E+00 TM 16 28471 03/20/96 Th-232 2.13E+00 4.75E+00 1.67E+01 TM 16 28471 03/20/96 Zn-65 -1.02E+00 3.07E+00 1.12E+01 TN 16 28471 03/20/96 2.40E+00 Zr 2.09E+00 6.87E+00 TM 20 28472 03/20/96 Ag-110M 1.57E+00 1.64E+00 5.62E+00 TM 20 28472 03/20/96 Ba-140 -0.59E+00 1.33E+00 5.37E+00 TM 20 28472 03/20/96 Be-7 -7.84E+00 9.70E+00 3.58E+01 TM 20 28472 03/20/96 Ce-141 -4.76E+00 2.15E+00 7.53E+00 TM 20 28472 03/20/96 Ce-144 -1.14E+00 7.70E+00 2.55E+01 TM 20 28472 03/20/96 Co-57 -1.39E+00 0.99E+00 3.39E+00 TM 20 28472 03/20/96 Co-58 0.57E+00 1.08E+00 3.69E+00 TM 20 28472 03/20/96 Co-60 0.30E+00 1.26E+00 4.45E+00 TM 20 28472 03/20/96 Cr-51 -0.88E+00 1.08E+01 3.81E+01 TM 20 28472 03/20/96 Cs-134 -2.60E+00 2.3BE+00 9.0BE+00 TM 20 28472 03/20/96 Cs-137 -1.32E+00 1.19E+00 4.68E+00 TM 20 28472 03/20/96 Fe-59 -5.62E+00 3.74E+00 1.44E+01 TM 20 28472 03/20/96 I-131 -7.85E-04 4.45E-02 0.19E+00 TM 20 28472 03/20/96 K-40 1.38E+03 5.26E+01 5.56E+01

TM 20 28472 03/20/96 Mn-54 -2.19E+00 1.14E+00. 4.54E+00 TM 20 28472 03/20/96 Ru-103 1.10E+00 1.30E+00 4.44E+00 TM 20 28472 03/20/96 Ru-106 -2.46E+00 9.92E+00 3.74E+01 TM 20 28472 03/20/96 Sb-124 -0.11E+00 2.56E+00 9.96E+00 TM 20 28472 03/20/96 Se-75 -0.66E+00 1.60E+00 5.62E+00 TM 20 28472 03/20/96 Th-232 4.62E+00 4.74E+00 1.61E+01 TM 20 28472 03/20/96 Zn-65 -6.92E+00 3.25E+00 1.27E+01 TM 20 28472 03/20/96 Zr-95 -1.07E+00 1.73E+00 6.41E+00 TM 21 28473 03/20/96 Ag-110M 2.15E+00 1.41E+00 4.51E+00 TM 21 28473 03/20/96 Ba-140 0.23E+00 1.10E+00 4.19E+00 TM 21 28473 03/20/96 Be-7 -0.93E+00 9.08E+00 3.25E+01 TM 21 28473 03/20/96 Ce-141 8.80E-02 1.96E+00 6.46E+00 TM 21 28473 03/20/96 Ce-144 1.34E+01 7.27E+00 2.27E+01 TM 21 28473 03/20/96 Co-57 -1.34E+00 0.90E+00 3.09E+00 TM 21 28473 03/20/96 Co-58 0.67E+00 1.14E+00 3.87E+00 TM 21 28473 03/20/96 Co-60 -6.47E-02 1.36E+00 5.11E+00 TM 21 28473 03/20/96 Cr-51 2.07E+00 1.01E+01 3.50E+01 TM 21 28473 03/20/96 Cs-134 0.53E+00 1.04E+00 3.74E+00 TM 21 28473 03/20/96 Cs-137 3.13E+00 1.15E+00 3.62E+00 TM 21 28473 03/20/96 Fe-59 -1.21E+00 3.75E+00 1.42E+01 TM 21 28473 03/20/96 I-131 5.15E-03 3.17E-02 0.13E+00 TM 21 28473 03/20/96 K-40 1.36E+03 5.16E+01 5.71E+01

1 TM 21 28473 03/20/96 Mn-54 -1.31E+00 0.98E+00 3.73E+00

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 21 28473 03/20/96 Ru-103 -2.39E+00 1.13E+00 4.43E+00 TM 21 28473 03/20/96 Ru-106 -2.17E+00 1.11E+01 4.11E+01 TM 21 28473 03/20/96 Sb-124 0.95E+00 1.89E+00 7.11E+00 TM 21 28473 03/20/96 Se-75 1.57E+00 1.21E+00 3.86E+00 TM 21 28473 03/20/96 Th-232 -7.78E+00 4.11E+00 1.59E+01 TM 21 28473 03/20/96 Zn-65 1.36E+00 2.50E+00 8.79E+00 TM 21 28473 03/20/96 Zr-95 0.51E+00 2.06E+00 7.58E+00 TM 04 28853 04/11/96 Ag-110M 0.20E+00 1.66E+00 5.95E+00 TM 04 28853 04/11/96 Ba-140 -0.78E+00 1.48E+00 5.95E+00 TM 04 28853 04/11/96 Be-7 -1.57E+01 9.52E+00 3.65E+fs1 TM 04 28853 04/11/96 Ce-141 1.06E+00 2.14E+00 6.99E^00 TM 04 28853 04/11/96 Ce-144 1.29E+00 7.93E+00 2.60E+01 TM 04 28853 04/11/96 Co-57 0.99E+00 0.98E+00 3.14E+00 TM 04 28853 04/11/96 Co-58 1.45E+00 1.03E+00 3.313+00 TM 04 28853 04/11/96 Co-60 2.29E+00 1.33E+00 4.21E+00 TM 04 28853 04/11/96 Cr-51 -2.03E+01 1.05E+01 3.96E+01 TM 04 2J853 04/11/96 Cs-134 -5.56E-02 1.18E+00 4.35E+00 TM 04 28853 04/11/96 Cs-137 2.96E+00 1.48E+00 5.21E+00 TM 04 28853 04/11/96 Fe-59 4.38E+00 3.26E+00 1.06E+01 TM 04 28853 04/11/96 I-131 -2.05E-02 7.69E-02 0.31E+00 TM 04 28853 04/11/96 K-40 1.37E+03 5.30E+01 6.27E+01

TM 04 28853 04/11/96 Mn-54 0.27E+00 1.25E+00 4.44E+00 TM 04 28853 04/11/96 Ru-103 0.12E+00 1.20E+00 4.25E+00 i TM 04 28853 04/11/96 Ru-106 1.35E+01 1.0BE+01 3.75E+01 !

TM 04 28853 04/11/96 Sb-124 0.46E+00 2.69E+00 1.03E+01 1 TM 04 28853 04/11/96 Se-75 -0.11E+00 1.55E+00 5.40E+00 ;

TM 04 28853 04/11/96 Th-232 -2.57E+00 4.62E+00 1.71E+01 j TM 04 28853 04/11/96 Zn-65 -4.29E+00 3.08E+00 1.17E+01 j TM 04 28853 04/11/96 Zr-95 -2,19E+00 1.90E+00 7.14E+00 i TM 09 28854 04/11/96 Ag-110M -0.27E+00 2.54E+00 9.84E+00 TM 09 28854 04/11/96 Ba-140 2.86E+00 2.04E+0C 6.63E+00 TM 09 28854 04/11/96 Be-7 -2,24E+00 1.30E+01 4.82E+01 TM 09 28854 04/11/96 Ce-141 -1.81E+00 2.35E+00 7.70E+00 TM 09 28854 04/11/96 Ce-144 1.12E+01 8.39E+00 2.52E+01 TM 09 28854 04/11/96 Co-57 0.80E+00 1.07E+0D 3.30E+00 TM 09 28854 04/11/96 Co-58 -1.88E+00 2.16E+00 8.58E+00 TM 09 28854 04/11/96 Co-60 0.80E+00 2.40E+00 8.77E+00 TM 09 28854 04/11/96 Cr-51 1.34E+01 1.35E+01 4.40E+01 TM 09 28854 04/11/96 Cs-134 -1.65E+00 1.62E+00 6.35E+00 TM 09 28854 04/11/96 Cs-137 3.18E+00 1.87E+00 6.09E+00 TM 09 28854 04/11/96 Fe-59 -4.11E+00 6.17E+00 2.42E+01 TM 09 28854 04/11/96 I-131 -3.49E-02 6.25E-02 0.27E+00 TM 09 28854 04/11/96 K-40 1.28E+03 7.48E+01 8.13E+01

TM 09 28854 04/11/96 Mn-54 0.32E+00 1.85E+00 6.97E+00 TM 09 28854 04/11/96 Ru-103 -0.70E+00 1.73E+00 6.46E+00 TM 09 28854 04/11/96 Ku-106 -1.39E+01 1.37E+01 5.48E+01 TM 09 28854 04/11/96 Sb-124 -3.35E+00 3.18E+00 1.48E+01 TM 09 28854 04/11/96 Se-75 0.37E+00 1.84E+00 6.21E+00 TM 09 28854 04/11/96 Th-232 -3.70E+00 6.63E+00 2.50E+01

Radioactivity detected (i . e . , Concentration > 3 Std. Deviations).

l

Seabrook Nuclear Powsr Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 09 28854 04/11/96 Zn-65 -4.18E+00 4.52E+00 1.78E+01 TM 09 28854 04/11/96 Zr-95 -1.16E+00 3.46E+00 1.34E+01 TM 15 28855 04/11/96 Ag-110M -2.64E+00 2.56E+00 1.00E+01 TM 15 28855 04/11/96 Ba-140 2.07E+00 2.74E+00 9.87E+00 TM 15 28855 04/11/96 Be-7 -1.01E+01 1.26E+01 4.80E+01 TM 15 28855 04/11/96 Ce-141 0.99E+00 2.44E+00 7.99E+00 TM 15 28855 04/11/96 Ce-144 8.86E+00 9.49E+00 3.05E+01 TM 15 28855 04/11/96 Co-57 0.55E+00 1.26E+00 4.11E+00 TM 15 28855 04/11/96 Co-58 -0.69E+00 1.45E+00 5.53E+00 TM 15 28855 04/11/96 Co-60 1.95E+00 2.20E+00 7.85E+00 TM 15 28855 04/11/96 Cr-51 8.59T. 00 1.53E+01 5.28E+01 TM 15 28855 04/11/96 Cs-134 -7.26E+00 3.46E+00 1.19E+01 TM 15 28855 04/11/96 Cs-137 0.28E+00 1.85E+00 6.91E+00 TM 15 28855 04/11/96 Fe-59 3.85E+00 5.90E+00 2.14E+01 TM 15 28855 04/11/96 I-131 3.39E-02 9.21E-02 0.35E+00 TM 15 28855 04/11/96 K-40 1.52E+03 7.85E+01 9.00E+01

TM 15 28855 04/11/96 Mn-54 2.52E+00 1.77E+00 5.71E+00 TM 15 28855 04/11/96 Ru-103 -4.22E+00 1.69E+00 6.94E+00 TM 15 28855 04/11/96 Ru-106 -6.38E+00 1.35E+01 5.31E+01 TM 15 28855 04/11/96 Sb-124 -2.97E+00 3.57E+00 1.57E+01 TM 15 28855 04/11/96 Se-75 -3,06E+00 1.77E+00 6.47E+00 TM 15 28855 04/11/96 Th-232 1.92E+00 5.75E+00 2.10E+01 l TM 15 28855 04/11/96 Zn-65 -1.27E+00 4.73E+00 1.76E+01 :

TM 15 28855 04/11/96 Zr-95 -0.96E+00 2.70E+00 1.01E+01 TM 16 28856 04/11/96 Ag-110M -0.59E+00 1.47E+00 5.31E+00 TM 16 28856 04/11/96 Ba-140 -1.96E+00 1.46E+00 6.05E+00 TM 16 28856 04/11/96 Be-7 -1.87E+00 8.25E+00 3.00E+01 TM 16 28856 04/11/96 Ce-141 0.46E+00 1.94E+00 6.39E+00 TM 16 28856 04/11/96 Ce-144 -1.08E+01 6.98E+00 2.41E+01 TM 16 28856 04/11/96 Co-57 1.19E+00 0.96E+00 3.04E+00 TM 16 28856 04/11/96 Co-58 -0.60E+00 0.98E+00 3.62E+00 TM 16 28856 04/11/96 Co-60 -1.95E+00 1.42E+00 5.70E+00 TM 16 28856 04/11/96 Cr-51 1.34E+01 1.07E+01 3.58E+01 TM 16 28856 04/11/96 Cs-134 -0.49E+00 2.23E+00 6.87E+00 TM 16 28856 04/11/96 Cs-137 6.04E+00 1.41E+00 4.46E+00

TM 16 28856 04/11/96 Fe-59 4.96E+00 3.94E+00 1.36E+01 TM 16 28856 04/11/96 I-131 5.82E-02 8.76E-02 0.31E+00 TM 16 28856 04/11/96 K-40 1.76E+03 5.86E+01 6.41E+01

TM 16 28856 04/11/96 Mn-54 0.23E+00 1.15E+00 3.98E+00 TM 16 28856 04/11/96 Ru-203 -2.45E+00 1.23E+00 4.73E+00 TM 16 28856 04/11/96 Ru-106 -1.88E+01 1.05E+01 4.20E+01 TM 16 28856 04/11/96 Sb-124 7.12E+00 2.47E+00 6.69E+00 TM 16 28856 04/11/96 Se-75 -0.90E+00 1.38E+00 4.73E+00 TM 16 28856 04/11/96 Th-232 -6.23E+00 4.25E+00 1.60E+01 TM 16 28856 04/11/96 Zn-65 -4.14E+00 2.97E+00 1.13E+01 TM 16 28856 04/11/96 Zr-95 0.28E+00 2.05E+00 7.60E+00 TM 20 28857 04/11/96 Ag-110M -1.93E+00 1.86E+00 7.11E+00 (

TM 20 28857 04/11/96 Ba-140 -2.99E+00 1.96E+00 8.49E+00

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

_ . - - ~ - - - . . . . - - , _ . _

t Seabrook Nuclear Power Station Radiological Environmental Monitoring Data .

(January - December 1996)

SAMPLE CONC. STD DEV. MDC '

TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

(

TM 20 28857 34/11/96 Be-7 -0.29E+00 1.21E+01 4.33E+01 ;

TM 20 23857 04/11/96 Ce-141 0.62E+00 2.21E+00 7.27E+00 '

TM 20 28857 04/11/96 Ce-144 1.17E+01 8.36E+00 2.65E+01 TM 20 28857 04/13/96 Co-57 1.57E+00 1.09E+00 3.43E+00 TM 20 28857 04/11/96 Co-58 2.14E+00 1.48E+00 4.74E+00 TM 20 28857 04/11/96 Co-60 0.91E+00 1.59E+00 5.84E+00 TM 20 28857 04/11/96 Cr-51 -2,15E+01 1.21E+01 4.61E+01 TM 20 28857 04/11/96 Cs-134 -0.47E+00 1.52E+00 5.73E+00 TM 20 28857 04/11/96 Cs-137 1.58E+00 1.54E+00 5.42E+00 -

TM 20 28857 04/11/96 Fe-59 -3.47E+00 4.55E+00 1.77E+01 TM 20 28857 04/11/96 I-131 0.14E+00 0.11E+00 0.35E+00 TM 20 28857 04/11/96 K-40 1.41E+03 6.55E+01 7.93E+01 * .

TM 20 28857 04/11/96 Mn-54 -1.38E+00 1.24E+00 4.77E+00 !

TM 20 28857 04/11/96 Ru-103 -3.43E+00 1.43E+00 5.76E+00 *

.TM 20 28F57 04/11/96 Ru-106 -8.75E+00 1.25E+01 4.85E+01 !

TM 20 26857 04/11/96 Sb-124 3.44E+00 2.62E+00 B.66E+00 '

TM 20 28857 04/11/96 Se-75 2.21E+00 1.83E+00 6.10E+00 28857 04/11/96 TM 20 Th-232 -1.36E+00 5.2BE+00 1.92E+01 TM 20 28857 04/11/96 Zn-65 0.95E+00 3.67E+00 1.32E+01 TM 20 28857 04/11/96 Zr-95 6.10E+00 2.19E+00 6.16E+00 -

i TM 21 28858 04/11/96 Ag-110M 0.00E+00 2.26E+00 8.32E+00 '

TM 21 28858 04/11/96 Ba-140 -2.01E+00 3.21E+00 1.30E+01 i TM 21 28858 04/11/96 Be-7 -2.04E+01 1.30E+01 5.09E+01 l TM 21 28858 04/11/96 Ce-141 -0.33E+00 2.50E+00 8.32E+00 TM 21 28858 04/11/96 Ce-144 2.78E+00 9.59E+00 3.14E+01 TM 21 28858 04/11/96 Co-57 -0.91E+00 1.15E+00 3.8BE+00 TM 21 28858 04/11/96 Co-58 0.44E+00 1.48E+00 5.24E+00 TM 21 28858 04/11/96 Co-60 0.25E+00 1.63E+00' 6.31E+00 TM 21 28858 04/11/96 Cr-51 1.13E+01 1.50E+01 5.14E+01 TM 21 28858 04/11/96 Cs-134 -5.64E+00 1.93E+00 7.99E+00 TM 21 28858 04/11/96 Cs-137 1.41E+00 1.67E+00 5.97E+00 TM 21 28858 04/11/96 Fe-59 -2.45E+00 6.29E+00 2.43E+01 TM 21 28858 04/11/96 I-131 4.25E-02 0.12E+00 0.43E+00 TM 21 28858 04/11/96 K-40 1.35E+03 6.97E+01 7.45E+01

TM 21 28858 04/11/96 Mn-54 1.49E+00 1.66E+00 5.55E+00 TM 21 28858 04/11/96 Ru-103 -2.03E+00 1.84E+00 6.96E+00 TM 21 28858 04/11/96 Ru-106 -1.46E+01 1.50E+01 5.92E+01 TM 21 28858 04/11/96 Sb-124 3.73E+00 4.57E+00 1.62E+01 TM 21 28858 04/11/96 Se-75 -0.95E+00 1.83E+00 6.29E+00 TM 21 28858 04/11/96 Th-232 6.04E+00 6.85E+00 2.36E+01 TM 21 2P858 04/11/96 Zn-65 3.96E+00 4.19E+00 1.44E+01 TM 21 28858 04/11/96 Zr-95 -2.54E+00 2.89E+00 1.09E+01 TM 04 29089 04/24/96 Ag-110M -0.20E+00 1.91E+00 6.87E+00 TM 04 29089 04/24/96 Ba-140 0.65E+00 1.77E+00 6.55E+00 TM 04 29089 04/24/96 Be-7 2.08E+00 9.85E+00 3.48E+01 TM 04 Ce-141 0.62E+00 6.76E+00 29089 04/24/96 2.06E+00 i

TM 04 29089 04/24/96 Ce-144 9.29E+00 7.68E+00 2.44E+01 TM 04 29089 04/24/96 Co-57 -1.10E+00 1.00E+00 3.39E+00 j TM 04 29089 04/24/96 Co-58 -0.39E+00 1.12E+00 4.05E+00

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

I__._.. _ _ _ . _ _,

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 04 29089 04/24/96 Co-60 -0.65E+00 1.55E+00 5.89E+00 TM 04 29089 04/24/96 Cr-51 5.72E+00 1.32E+01 4.54E+01 TM 04 29089 04/24/96 Cs-134 -1.11E+00 1.19E+00 4.54E+00 TM 04 29089 04/24/96 Cs-137 2.76E+00 1.41E+00 4.69E+00 TM 04 29089 04/24/96 Fe-59 -1.02E+00 4.40E+00 1.65E+01 l TM 04 29089 04/24/96 I-131 -4.33E-02 4.20E-02 0.27E+00

! TM 04 29089 04/24/96 K-40 1.30E+03 5.28E+01 6.21E+01

TM 04 29089 04/24/96 Mn-54 1.47E+00 1.17E+00 3.80E+00 TM 04 29089 04/24/96 Ru-103 1.70E+00 1.25E+00 4.16E+00 TM 04 29089 04/24/96 Ru-106 3.34E+00 1.16E+01 4.21E+01 TM 04 29089 04/24/96 Sb-124 2.59E+00 2.14E+00 7.31E+00 TM 04 29089 04/24/96 Se-75 2.50E+00 1.64E+00 5.41E+00 TM 04 29089 04/24/96 Th-232 6.89E+00 4.72E+00 1.57E+01 TM 04 29089 04/24/96 Zn-65 2.75E+00 2.75E+00 9.39E+00 TM 04 29089 04/24/96 Zr-95 0.16E+00 2.05E+00 7.20E+00 TM 09 29090 04/24/96 Ag-110M -2.97E+00 1.84E+00 7.11E+00 TM 09 29090 04/24/96 Ba-140 -4.00E+00 1.63E+00 7.49E+00 TM 09 29090 04/24/96 Be-7 -6.05E+00 9.87E+00 3.62E+01 TM 09 29090 04/24/96 Ce-141 0.96E+00 2.25E+00 7.38E+00 TM 09 29090 04/24/96 Ce-144 0.46E+00 7.97E+00 2.62E+01 1 TM 09 29090 04/24/96 Co-57 0.61E+00 1.03E+00 3.32E+00

( TM 09 29090 04/24/96 Co-58 0.55E+00 1.14E+00 3.90E+00 i TM 09 29090 04/24/96 Co-60 -3.38E-02 1.23E+00 4.44E+00 TM 09 29090 04/24/96 Cr-51 1.02E+01 1.19E+01 4.04E+01 TM 09 29090 04/24/96 Cs-134 -1.78E+00 2.23E+00 7.07E+00 TM 09 29090 04/24/96 Cs-137 2.56E+00 1.48E+00 5.48E+00 TM 09 29090 04/24/96 Fe-59 -1.43E+00 3.48E+00 1.28E+01 TM 09 29090 04/24/96 I-131 0.13E+00 0.11E+00 0.26E+00 TM 09 29090 04/24/96 K-40 1.39E+03 5.29E+01 5.73E+01

TM 09 29090 04/24/96 Mn-54 1.43E+00 1.15E+00 3.85E+00 TM 09 29090 04/24/96 Ru-103 -2.29E+00 1.31E+00 5.00E+00

TM 09 29090 04/24/96 Ru-106 -4.95E+00 1.09E+01 4.13E+01 l TM 09 29090 04/24/96 Sb-124 -0.70E+00 2.7BE+00 1.09E+01 l TM 09 29090 04/24/96 Se-75 -0.67E+00 1.59E+00 5.62E+00 j TM 09 29090 04/24/96 Th-232 5.14E+00 4.24E+00 1.43E+01 l TM 09 29090 04/24/96 Zn-65 -8.62E+00 2.89E+00 1.19E+01 1 TM 09 29090 04/24/96 Zr-95 0.29E+00 1.89E+00 6.62E+00 i

l TM 15 29091 04/24/96 Ag-110M -0.94E+00 2.81E+09 1.09E+01 TM 15 29091 04/24/96 Ba-140 0.29E+00 1.97E+00 8.11E+00 TM 15 29091 04/24/96 Be-7 -2.43E+01 1.57E+01 6.14E+01 TM 15 29091 04/24/96 Ce-141 -1.49E+00 2.53E+00 8.21E+00 TM 15 29091 04/24/96 Ce-144 8.70E+00 8.64E+00 2.63E+01 TM 15 29091 04/24/96 Co-57 -0.15E+00 1.13E+00 3.57E+00 TM 15 29091 04/24/96 Co-58 -2.19E+00 1.90E+00 7.83E+00 TM 15 29091 04/24/96 Co-60 0.56E+00 1.53E+00 5.88E+00 TM 15 29091 04/24/96 Cr-51 3.84E+00 1.46E+01 4.95E+01 TM 15 29091 04/24/96 Cs-134 -0.24E+00 1.BBE+00 6.87E+00 TM 15 29091 04/24/96 Cs-137 3.22E+00 1.79E+00 5.78E+00 TM 15 29091 04/24/96 Fe-59 -1.03E+00 6.42E+00 2.43E+01

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 15 29091 04/24/96 I-131 -7.50E-03 4.45E-02 0.21E+00 TM 15 29091 04/24/96 K-40 1.51E+03 8.01E+01 7.12E+01

TM 15 29091 04/24/96 Mn-54 -4.65E-02 1.93E+00 7.35E+00 TM 15 29091 04/24/96 Ru-103 -0.96E+00 1.80E+00 6.76E+00 TM 15 29091 04/24/96 Ru-106 1.90E+01 1.54E+01 5.18E+01 TM 15 29091 04/24/96 Sb-124 0.45E+00 3.00E+00 1.23E+01 TM 15 29091 04/24/96 Se-75 -1.15E+00 1.95E+00 6.82E+00 TM 15 29091 04/24/96 Th-232 3.57E+00 7.05E+00 2.46E+01 TM 15 29091 04/24/96 Zn-65 2.80E+00 4.65E+00 1.65E+01 TM 15 29091 04/24/96 Zr-95 0.51E+00 3.46E+00 1.31E+01 TM 16 29092 04/24/96 Ag-110M -1.47E+00 1.49E+00 5.52E+00 TM 16 29092 04/24/96 Ba-140 2.72E+00 1.33E+00 3.89E+00 TM 16 29092 04/24/96 Be-7 -4.78E+00 9.22E+00 3.37E+01 TM 16 29092 04/24/96 Ce-141 -3.97E-02 2.03E+00 6.70E+00 TM 16 29092 04/24/96 Ce-144 -1.83E+00 7.22E+00 2.40E+01 TM 16 29092 04/24/96 Co-57 1.21E+00 0.96E+00 3.06E+00 TM 16 29092 04/24/96 Co-58 1.88E+00 1.18E+00 3.76E+00 TM 16 29092 04/24/96 Co-60 1.39E+00 1.43E+00 5.02E+00 TM 16 29092 04/24/96 Cr-51 1.58E+01 1.12E+01 3.72E+01 TM 16 29092 04/24/96 Cs-134 4.67E+00 2.01E+00 5.39E+00 TM 16 29092 04/24/96 Cs-137 1.59E+00 1.22E+00 4.20E+00 TM 16 29092 04/24/96 Fe-59 -3.67E+00 4.32E+00 1.66E+01 TM 16 29092 04/24/96 I-131 -2.46E-02 2.93E-02 0.17E+00 TM 16 29092 04/24/96 K-40 1.70E+03 5.68E+01 5.21E+01

TM 16 29092 04/24/96 Mn-54 0.97E+00 1.06E+00 3.53E+00 TM 16 29092 04/24/96 Ru-103 1.81E+00 1.19E+00 3.92E+00 TM 16 29092 04/24/96 Ru-106 1.51E+01 9.69E+00 3.30E+01 TM 16 29092 04/24/96 Sb-124 6.30E+00 2.95E+00' 9.12E+00 TM 16 29092 04/24/96 Se-75 -0.61E+00 1.29E+00 4.41E+00 TM 16 29092 04/24/96 Th-232 -1.29E+00 4.15E+00 1.49E+01 TM 16 29092 04/24/96 Zn-65 -0.86E+00 2.80E+00 1.02E+01 TM 16 29092 04/24/96 Zr-95 0.69E+00 2.04E+00 7.46E+00 TM 20 29093 04/24/96 Ag-110M -1.37E+00 1.72E+00 6.47E+00 TM 20 29093 04/24/96 Ba-140 -2.08E+00 1.77E+00 7.40E+00 TM 20 29093 04/24/96 Be-7 1.04E+00 9.46E+00 3.38E+01 TM 20 29093 04/24/96 Ce-141 -1.13E+00 2.06E+00 6.92E+00 TM 20 29093 04/24/96 Ce-144 -7.87E+00 7.90E+00 2.6BE+01 TM 20 29093 04/24/96 Co-57 -1.86E+00 1.05E+00 3.62E+00 TM 20 29093 04/24/96 Co-58 -0.85E+00 1.09E+00 4.06E+00 TM 20 29093 04/24/96 Co-60 -7.36E-02 1.54E+00 5.72E+00 TM 20 29093 04/24/96 Cr-51 8.59E+00 1.16E+01 3.95E+01 TM 20 29093 04/24/96 Cs-134 -5.74E-02 1.22E+00 4.49E+00 TM 20 29093 04/24/96 Cs-137 3.75E+00 1.39E+00 4.82E+00 TM 20 29093 04/24/96 Fe-59 2.13E+00 3.99E+00 1.44E+01 TM 20 29093 04/24/96 I-131 3.89E-02 5.74E-02 0.22E+00 TM 20 29093 04/24/96 K-40 1.33E+03 5.34E+01 6.45E+01

TM 20 29093 04/24/96 Mn-54 1.02E+00 1.19E+00 3.98E+00 TM 20 29093 04/24/96 Ru-103 -2.23E+00 1.37E+00 5.20E+00 TM 20 29093 04/24/96 Ru-106 2.02E+01 1.12E+01 3.76E+01

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 29093 04/24/96 Sb-124 -4.67E+00 2.38E+00 1.08E+01 TM 20 29093 04/24/96 Se-75 -1.48E+00 1.59E+00 5.70E+00 TM 20 29093 04/24/96 Th-232 -0.53E+00 4.72E+00 1.71E+01 TM 20 29093 04/24/96 Zn-65 -4.81E+00 2.99E+00 1.17E+01 TM 20 29093 04/24/96 Zr-95 1.61E+00 2.04E+00 6.85E+00 TM 21 29094 04/24/96 Ag-110M 2.69E+00 1.64E+00 5.35E+00 ,

TM 21 29094 04/24/96 Ba-140 -3.07E+00 1.46E+00 6.75E+00 TM 21 29094 04/24/96 Be-7 1.41E+01 1.02E+01 3.3BE+01 TM 21 29094 04/24/96 Ce-141 -1.54E+00 2.34E+00 7.86E+00 l TM 21 29094 04/24/96 Ce-144 -3.13E+00 8.01E+00 2.66E+01 TM 21 29094 04/24/96 Co-57 -0.63E+00 1.06E+00 3.55E+00 TM 21 29094 04/24/96 Co-58 1.46E+00 1.16E+00 3.77E+00 TM 21 29094 04/24/96 Co-60 -0.91E+00 1.28E+00 4.82E+00 TM 21 29094 04/24/96 Cr-51 -6.50E+00 1.19E+01 4.26E+01 TM 21 29094 04/24/96 Cs-134 0.67E+00 2.04E+00 6.16E+00 TM 21 29094 04/24/96 Cs-137 0.96E+00 1.17E+00 4.18E+00 TM 21 29094 04/24/96 Fe-59 -1.52E+00 3.35E+00 1.24E+01 TM 21 29094 04/24/96 I-131 1.40E-02 4.52E-02 0.18E+00 TM 21 29094 04/24/96 K-40 1.37E+03 5.28E+01 5.94E+01

TM 21 29094 04/24/96 Mn-54 0.82E+00 1.15E+00 3.98E+00 TM 21 29094 04/24/96 Ru-103 -1.02E+00 1.27E+00 4.69E+00 TM 21 29094 04/24/96 Ru-106 3.81E+00 1.17E+01 4.23E+01 TM 21 29094 04/24/96 Sb-124 1.96E+00 2.80E+00 1.02E+01 TM 21 29094 04/24/96 Se-75 1.11E+00 1.71E+00 5.79E+00 TM 21 29094 04/24/96 Th-232 1.40E+00 4.63E+00 1.64E+01 TM 21 29094 04/24/96 Zn-65 -0.99E+00 2.75E+00 1.02E+01 TM 21 29094 04/24/96 Zr-95 3.87E+00 2.14E+00 6.71E+00 TM 04 29293 05/08/96 Ag-110M -0.20E+00 1.62E+00 5.94E+00 TM 04 29293 05/08/96 Ba-140 2.25E+00 1.55E+00 5.11E+00 TM 04 29293 05/08/96 Be-7 1.04E+00 9.81E+00 3.49E+01 TM 04 29293 05/08/96 Ce-141 2.80E+00 2.21E+00 7.01E+00 TM 04 29293 05/08/96 Ce-144 1.17E+01 8.29E+00 2.62E+01 TM 04 29293 05/08/96 Co-57 0.92E+00 1.07E+00 3.45E+00 i TM 04 29293 05/08/96 Co-58 -2.05E+00 1.28E+00 4.86E+00 1 TM 04 29293 05/08/96 Co-60 -1.47E+00 1.53E+00 6.00E+00 TM 04 29293 05/08/96 Cr-51 -1.24E+01 1.15E+01 4.19E+01 TM 04 29293 05/08/96 Cs-134 -6.40E+00 2.61E+00 1.01E+01 TM 04 29293 05/08/96 Cs-137 0.56E+00 1.24E+00 4.51E+00 TM 04 29293 05/08/96 Fe-59 -3.19E+00 3.82E+00 1.50E+01 TM 04 29293 05/08/96 I-131 2.36E-02 4.00E-02 0.15E+00 TM 04 29293 05/08/96 K-40 1.34E+03 5.31E+01 5.84E+01

TM 04 29293 05/08/96 Mn-54 -1.38E+00 1.09E+00 4.13E+00 TM 04 29293 05/08/96 Ru-103 -1.84E+00 1.37E+00 5.13E+00 TM 04 29293 05/08/96 Ru-106 -0.39E+00 1.15E+01 4.26E+01 TM 04 29293 05/08/96 Sb-124 -1.56E+00 2.80E+00 1.11E+01 TM 04 29293 05/08/96 Se-75 1.37E+00 1.58E+00 5.33E+00 TM 04 29293 05/08/96 Th-232 -1.01E+01 4.60E+00 1.84E+01 TM 04 29293 05/08/96 Zn-65 -3.23E+00 3.25E+00 1.22E+01 TM 04 29293 05/08/96 Zr-95 2.99E+00 1.96E+00 6.27E+00

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) pCi/kg)

(

TM 15 31391 09/04/96 Zn-65 -3.67E+00 4.33E+00 1.74E+01 TM 15 31391 09/04/96 Zr-95 0.00E+00 2.76E+00 1.03E+01 TM 16 31392 09/04/96 Ag-110M -2.19E+00 2.40E+00 9.81E+00 TN 16 31392 09/04/96 Ba-140 -0.60E+00 2.99E+00 1.22E+01 TM 16 31392 09/04/96 Be-7 2.33E+01 1.75E+01 5.61E+01 TM 16 31392 09/04/96 Ce-141 0.55E+00 3.71E+00 1.19E+01 TM 16 31392 09/04/96 Ce-144 3.65E+01 1.30E+01 3.61E+01 TM 16 31392 09/04/96 Co-57 4.04E+00 1.66E+00 4.71E+00 TM 16 31392 09/04/96 Co-58 -1.15E+00 1.81E+00 6.94E+00 TM 16 31392 09/04/96 Co-60 2.89E+00 2.16E+00 6.91E+00 TM 16 31392 09/04/96 Cr-51 1.76E+01 1.96E+01 6.45E+01 TM 16 31392 09/04/96 Cs-134 -1.12E+00 1.76E+00 6.44E+00 TM 16 31392 09/04/96 Cs-137 7.97E+00 2.54E+00 7.50E+00

TM 16 31392 09/04/96 Fe-59 1.24E+01 6.74E+00 2.03E+01 TM 16 31392 09/04/96 I-131 5.29E-02 7.28E-02 0.35E+00 TM 16 31392 09/04/96 K-40 1.86E+03 1.01E+02 1.13E+02

TM 16 31392 09/04/96 Mn-54 0.28E+00 1.87E+00 6.61E+00 TM 16 31392 09/04/96 Ru-103 -4.84E+00 1.80E+00 7.85E+00 TM 16 31392 09/04/96 Ru-106 -1.54E+01 1.65E+01 6.72E+01 !

TM 16 31392 09/04/96 Sb-124 7.06E+00 4.30E+00 1.33E+01 I TM 16 31392 09/04/96 Se-75 -1.09E+00 2.37E+00 8.46E+00 TM 16 31392 09/04/96 Th-232 -7.26E+00 8.16E+00 3.17E+01 '

TM 16 31392 09/04/96 Zn-65 -5.54E+00 5.58E+00 2.15E+01 TM 16 31392 09/04/96 Zr-95 2.54E+00 3.28E+00 1.10E+01 l l

TM 20 31393 09/04/96 Ag-110M 0.40E+00 2.32E+00 9.01E+00 !

TM 20 31393 09/04/96 Ba-140 2.10E+00 3.19E+00 1.20E+01 l TM 20 31393 09/04/96 Be-7 -2,48E+00 1.46E+01 5.78E+01 TM 20 31393 09/04/96 Ce-141 ?.59E+00 3.46E+30 9.90E+00 TM 20 31393 09/04/96 Ce-144 0.00E+00 1.22E+01 4.09E+01 TM 20 31393 09/04/96 Co-57 ~2.46E+00 1.48E+00 5.54E+00 TM 20 31393 09/04/96 Co-58 -4.41E+00 1.94E+00 9.27E+00 TM 20 31393 09/04/96 Co-60 0.57E+00 2.46E+00 9.59E+00 TM 20 31393 09/04/96 Cr-51 4.61E+01 1.92E+01 5.45E+01 TM 20 31393 09/04/96 Cs-134 0.11E+00 1.56E+00 5.91E+00 TM 20 31393 09/04/96 Cs-137 -1.63E+00 2.60E+00 1.06E+01 TM 20 31393 09/04/96 Fe-59 -0.33E+00 6.69E+00 2.68E+01 TM 20 31393 09/04/96 I-131 6.79E-02 8.57E-02 0.40E+00 TM 20 31393 09/04/96 K-40 1.46E+03 1.08E+02 1.04E+02

TM 20 31393 09/04/96 Mn-54 3.24E+00 2.26E+00 7.06E+00 i TM 20 31393 09/04/96 Ru-103 -2.18E+00 2.26E+00 9.18E+00 i TM 20 31393 09/04/96 Ru-106 4.60E+00 1.78E+01 6.90E+01 )

TM 20 31393 09/04/96 Sb-124 0.00E+00 2.73E+00 1.40E+01 TM 20 31393 09/04/96 Se-75 -3.75E+00 2.53E+00 1.01E+01 TM 20 31393 09/04/96 Th-232 2.35E+00 7.70E+00 2.87E+01 TM 20 31393 09/04/96 Zn-65 4.45E+00 6.51E+00 2.28E+01 TM 20 31393 09/04/96 Zr-95 2.80E+00 4.22E+00 1.45E+01 TM 21 31394 09/04/96 Ag-110M -2.25E+00 2.31E+00 9.88E+00 TM 21 31394 09/04/96 Ba-140 0.71E+00 2.63E+00 1.09E+01 L

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l l

Seabrook Nuclear Power Station

Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (

_.._.___________________.._..______________________.... _____________pCi/kg)

TM 21 31394 09/04/96 Be-7 -1.48E+01 1.41E+01 5.84E+01 TM 21 31394 09/04/96 Ce-141 6.01E+00 3.51E+00 1.05E+01 TM 21 31394 09/04/96 Ce-144 -1.04E+01 1.22E+01 4.11E+01 TM 21 31394 09/04/96 Co-57 0.40E+00 1.44E+00 4.62E+00 TM 21 31394 09/04/96 Co-58 -2.78E+00 1.81E+00 7.96E+00 TM 21 31394 09/04/96 Co-60 2.53E+00 2.49E+00 8.56E+00 TM 21 31394 09/04/96 Cr-51 -1.55E+01 1.78E+01 6.75E+01 TM 21 31394 09/04/96 Cs-134 -2.26E+00 2.26E+00 9.03E+00 TM 21 31394 09/04/96 Cs-137 1.83E+00 2.15E+00 7.64E+00 TM 21 31394 09/04/96 Fe-59 0.44E+00 7.20E+00 2.75E+01 TM 21 31394 09/04/96 I-131 5.89E-02 8.10E-02 0.39E+00 TM 21 31394 09/04/96 K-40 1.48E+03 1.06E+02 1.39E+02

TM 21 31394 09/04/96 Mn-54 1.07E+00 1.79E+00 6.29E+00 TM 21 31394 09/04/96 Ru-103 -0.62E+00 1.93E+00 7.37E+00 TM 21 31394 09/04/96 Ru-106 2.70E+01 2.22E+01 7.52E+01 TM 21 31394 09/04/96 Sb-124 1.10E+01 5.73E+00 1.59E+01 TM 21 31394 09/04/96 Se-75 -3.77E+00 2.57E+00 9.78E+00 TM 21 31394 09/04/96 Th-232 -3.61E+00 7.22E+00 2.87E+01 '

TM 21 31394 09/04/96 Zn-65 -3.86E+00 5.27E+00 2.13E+01 TM 21 31394 09/04/96 Zr-95 1.09E+00 3.14E+00 1.14E+01 TM 04 31655 09/18/96 Ag-110M -0.82E+00 2.56E+00 9.54E+00 l TM 04 31655 09/18/96 Ba-140 -1.93E+00 1.66E+00 8.92E+00 TM 04 31655 09/18/96 Be-7 -1.63E+01 1.26E+01 5.21E+01 TM 04 31655 09/18/96 Ce-141 -1.12E+00 3~16E+00

. 1.04E+01 TM 04 31655 09/18/96 Ce-144 -1.93E+01 1.08E+01 3.84E+01 TM 04 31655 09/18/96 Co-57 -0.32E+00 1.40E+00 4.61E+00 TM 04 31655 09/18/96 Co-58 -1.30E+00 1.62E+00 6.48E+00 TM 04 31655 09/18/96 Co-60 1.10E+00 2.12E+00 7.69E+00 TM 04 31655 09/18/96 Cr-51 -0.41E+00 1.64E+01 5.81E+01 TM 04 31655 09/18/96 Cs-134 0.84E+00 1.61E+00 5.47E+00 TM 04 31655 09/18/96 Cs-137 1.11E+00 2.06E+00 7.44E+00 TM 04 31655 09/18/96 Fe-59 2.52E+00 4.91E+00 1.81E+01 TM 04 31655 09/18/96 I-131 -9.32E-04 5.08E-02 0.27E+00 TM 04 31655 09/18/96 K-40 1.55E+03 9.33E+01 1.11E+02

TM 04 31655 09/18/96 Mn-54 -1.32E+00 1.46E+00 5.96E+00 TM 04 31655 09/18/96 Ru-103 0.11E+00 1.59E+00 5.88E+00 TM 04 31655 09/18/96 Ru-106 3.74E+01 1.53E+01 4.43E+01 TM 04 31655 09/18/96 Sb-124 -1.19E+01 4.06E+00 2.15E+01 TM 04 31655 09/18/96 Se-75 1.00E+00 2.17E+00 7.40E+00 TM 04 31655 09/18/96 Th-232 -1.03E+01 6.10E+00 2.62E+01 TM 04 31655 09/18/96 Zn-65 -3.55E+00 4.50E+00 1.79E+01 TM 04 31655 09/18/96 Zr-95 -4.15E+00 3.37E+00 1.34E+01 TM 09 31656 09/18/96 Ag-110M -0.66E+00 2.27E+00 8.57E+00 TM 09 31656 09/18/96 Ba-140 -1.61E+00 2.69E+00 1.17E+01 TM 09 31656 09/18/96 Be-7 1.96E+01 1.46E+01 4.70E+01 TM 09 31656 09/18/96 Ce-141 -0.17E+00 2.87E+00 9.21E+00 TM 09 31656 09/18/96 Ce-144 -2.06E+01 1.12E+01 3.78E+01 TM 09 31656 09/18/96 Co-57 0.35E+00 1.48E+00 4.62E+00 TM 09 31656 09/18/96 Co-58 0.00E+00 1.97E+00 7.03E+00

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 09 31656 09/18/96 Co-60 6.55E-02 2.02E+00 7.82E+00 TM 09 31656 09/18/96 Cr-51 -1.27E+01 1.61E+01 5.88E+01 TM 09 31656 09/18/96 Cs-134 0.74E+00 1.44E+00 4.72E+00 TM 09 31656 09/18/96 Cs-137 5.20E+00 2.43E+00 7.59E+00 TM 09 31656 09/18/96 Fe-59 -1.09E+01 4.53E+00 2.57E+01 TM 09 31656 09/18/96 I-131 6.05E-02 5.42E-02 0.23E+00 TM 09 31656 09/18/96 K-40 1.45E+03 9.32E+01 1.27E+02

TM 09 '656 09/18/96 Mn-54 0.91E+00 1.86E+00 6.38E+00 TM 09 56 09/18/96 Ru-103 -3.77E+00 1.76E+00 7.31E+00 TM 09 ,656 09/18/96 Ru-106 -1.06E+01 1.59E+01 6.31E+01 TM 09 31656 09/18/96 Sb-124 1.44E+00 3.65E+00 1.43E+01 TM 09 31656 09/18/96 Se-75 3.16E+00 2.51E+00 8.05E+00 TM 09 31656 09/18/96 Th-232 1.80E+01 7.41E+00 2.05E+01 TM 09 31656 09/18/96 Zn-65 0.00E+00 4.46E+00 1.58E+01 TM 09 31656 09/18/96 Zr-95 0.66E+00 3.29E+00 1.24E+01 TM 15 31657 09/18/96 Ag-110M 0.64E+00 2.27E+00 8.50E+00 TM 15 31657 09/18/96 Ba-140 2.01E+00 2.16E+00 7.86E+00 ,

TM 15 31657 09/18/96 Be-7 1.44E+00 1.64E+01 5.88E+01 l TM 15 31657 09/18/96 Ce-141 -1.62E+00 3.48E+00 1.16E+01 '

TM 15 31657 09/18/96 Ce-144 -3.96E+00 1.16E+01 3.83E+01 TM 15 31657 09/18/96 Co-57 -1.41E+00 1.55E+00 5.23E+00 TM 15 31657 09/18/96 Co-58 -0.21E+00 1.77E+00 6.60E+00 TM 15 31657 09/18/96 Co-60 -0.86E+00 2.12E+00 8.34E+00 :

TM 15 31657 09/18/96 Cr-51 -1.22E+01 1.55E+01 5.88E+01 TM 15 31657 09/18/96 Cs-134 -8.03E-02 1.60E+00 5.76E+00 TM 15 31657 09/18/96 Cs-137 -0.39E+00 2.02E+00 7.82E+00 TM 15 31657 09/18/96 Fe-59 1.68E+00 5.76E+00 2.10E+01 TM 15 31657 09/18/96 I-131 9.74E-02 8.30E-02 0.36E+00 TM 15 31657 09/18/96 K-40 1.72E+03 1.01E+02 1.23E+02

TM 15 31657 09/18/96 Mn-54 -1.29E+00 1.32E+00 5.65E+00 TM 15 31657 09/18/96 Ru-103 0.24E+00 2.23E+00 7.96E+00 TM 15 31657 09/18/96 Ru-106 6.58E+00 1.80E+01 6.62E+01 TM 15 31657 09/18/96 Sb-124 0.00E+00 3.40E+00 1.48E+01 l TM 15 31657 09/18/96 Se-75 2.07E+00 2.20E+00 7.29E+00 TM 15 31657 09/18/96 Th-232 -4.82E+00 6.92E+00 2.77E+01 TM 15 31657 09/18/96 Zn-65 2.15E+00 4.12E+00 1.49E+01 TM 15 31657 09/18/96 Zr-95 2.24E+00 3.41E+00 1.16E+01 j TM 16 31658 09/18/96 Ag-110M 2.50E+00 2.36E+00 7.76E+00 TM 16 31658 09/18/96 Ba-140 1.51E+00 2.30E+00 8.65E+00 TM 16 31658 09/18/96 Be-7 2.46E+00 1.53E+01 5.53E+01 l TM 16 31658 09/18/96 Ce-141 0.48E+00 3.21E+00 1.03E+01 ;

TM 16 31658 09/18/96 Ce-144 1.31E+01 1.12E+01 3.43E+01 ]

TM 16 31658 09/18/96 Co-57 0.64E+00 1.46E+00 4.65E+00 -

TM 16 31658 09/18/96 Co-58 0.54E+00 2.10E+00 7.39E+00 TM 16 31658 09/18/96 Co-60 -2.01E+00 2.10E+00 8.9BE+00 TM 16 31658 09/18/96 Cr-51 5.19R+00 1.59E+01 5.57E+01 TM 16 31658 09/18/96 Cs-134 -3. 2 9E- 00 1.4BE+00 6.85E+00

, TM 16 31658 09/18/96 Cs-137 2.24E'00 2.14E+00 7.39E+00 TM 16 31658 09/18/96 Fe-59 0.92E+00 5.84E+00 2.21E+01

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

. .- - - - . . _- . . ~ . . - , - , - ,, ,- .

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 16 31658 09/18/96 I-131 6.98E-02 7.10E-02 0.32E+0C TM 16 31658 09/18/96 K-40 1.78E+03 1.02E+02 9.54E+01

TM 16 31658 09/18/96 Mn-54 -1.43E+00 1.58E+00 6.44E+00 TM 16 31658 09/18/96 Ru-103 -0.89E+00 1.75E+00 6.78E+00 TM 16 31658 09/18/96 Ru-106 2.04E+01 1.98E+01 6.83E+01 TM 16 31658 09/18/96 Sb-124 -0.59E+00 2.93E+00 1.35E+01 TM 16 31658 09/18/96 Se-75 -1.31E+00 2.33E+00 8.47E+00 TM 16 31658 09/lb/96 Th-232 2.30E+00 6.62E+00 2.39E+01 TM 16 31658 09/18/96 Zn-65 -3.46E+00 5.35E+00 2.07E+01 TM 16 31658 09/.18/9C Zr-95 -4.86E+00 3.10E+00 1.31E+01 TM 20 31659 09/18/96 Ag-110M -4.90E+00 1.89E+00 9.08E+00 TM 20 31659 09/18/96 Ba-140 0.00E+00 2.36E+00 9.70E+00 TM 20 31659 09/18/96 Be-7 1.36E+00 1.32E+01 4.82E+01 TM 20 31659 09/18/96 Ce-141 1.90E+00 2.95E+00 9.35E+00 TM 20 31659 09/18/96 Ce-144 0.42E+00 1.07E+01 3.47E+01 TM 20 31659 09/18/96 Co-57 -0.76E+00 1.29E+00 4.36E+00 TM 20 31659 09/18/96 Co-58 0.20E+00 1.96E+00 7.00E+00 TM 20 31659 09/18/96 Co-60 -0.52E+00 1.49E+00 6.41E+00 TM 20 31659 09/18/96 Cr-51 -1.23E+01 1.39E+01 5.34E+01 TM 20 31659 09/18/96 Cs-134 2.50E+00 1.67E+00 4.25E+00 TM 20 31659 09/18/96 Cs-137 1.76E-07 1.48E+00 5.87E+00 TM 20 31659 09/18/96 Fe-59 -3,29E+00 5.86E+00 2.34E+01 TM 20 31659 09/18/96 I-131 1.34E-02 5.39E-02 0.28E+00 TM 20 31659 09/18/96 K-40 1.34E+03 C.53E+01 8.15E+01

TM 20 31659 09/18/96 Mn-54 0.78E+00 1.42E+00 5.04E+00 TM 20 31659 09/18/96 Ru-103 -1.20E+00 1.51E+00 6.05E+00 TM 20 31659 09/18/96 Ru-106 2.83E+00 1.13E+01 4.44E+01 TM 20 31659 09/18/96 Sb-124 0.55E+00 2.83E+00 1.10E+01 TM 20 31659 09/18/96 Se-75 -2.60E+00 1.90E+00 7.40E+00 TM 20 31659 09/18/96 Th-232 2.84E+00 6.92E+00 2.45E+01 TM 20 31659 09/18/96 Zn-65 -1.03E+00 4.45E+00 1.69E+01 TM 20 31659 09/18/96 Zr-95 6.39E+00 3.17E+00 9.10E+00 TM 21 31660 09/18/96 Ag-110M -0.29E+00 2.49E+00 9.28E+00 TM 21 31660 09/18/96 Ba-140 3.20E+00 2.96E+00 9.99E+00 TM 21 31660 09/18/96 Be-7 -3.69E+01 1.58E+01> 6.75E+01 TM 21 31660 09/18/96 Ce-141 1.44E+00 3.24E+00 1.03E+01 TM 21 31660 09/18/96 Ce-144 1.18E+01 1.20E+01 3.68E+01 l TM 21 31660 09/18/96 Co-57 1.64E+00 1.61E+00 4.93E+00 TM 21 31660 09/18/96 Co-58 -2.16E+00 1.30E+00 6.09E+00 TM 21 31660 09/18/96 Co-60 1.73E+00 2.34E+00 8.26E+00 l TM 21 31660 09/18/96 Cr-51 2.86E+01 1.59E+01 4.88E+01 l TM 21 31660 09/18/96 Cs-134 -1.24E+00 1.43E+00 5.66E+00 TM 21 31660 09/18/96 Cs-137 5.21E+00 2.16E+00 6.36E+00 TM 21 31660 09/18/96 Fe-59 2.17E+00 6.65E+00 2.43E+01 TM 21 31660 09/18/96 I-131 -6.24E-03 3.88E-02 0.23E+00

! TM 21 31660 09/18/96 K-40 1.44E+03 9.07E+01 7.23E+01 *

, TM 21 31660 09/18/96 Mn-54 0.51E+00 1.75E+00 6.25E+00 1 TM 21 31660 09/18/96 Ru-103 -2.94E+00 2.05E+00 8.21E+00 TM 21 31660 09/18/96 Ru-106 2.78E+00 1.56E+01 5.96E+01 l

l

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

- -. _-__ .- - . ~ - _ _ . - - - - - - - - - . . , . , , . _,...,~.,.;,.; .-

i 4

i i

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data

?

(January - December 1996)

SAMPLE CONC. STD DEV. MDC

} TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (

_...________pCi/kg)

TM 21 31660 09/18/96 Sb-124 4.8BE+00 3.16E+00 9.14E+00 TM 21 31660 09/18/96 Se-75 -0.76E+00 2.50E+00 8.88E+00 3

TM 21 31660 09/18/96 Th-232 0.61E+00 6.45E+00 2.40E+01 TM 21 31660 09/18/96 Zn-65 -7.54E+00 4.80E+00 2.02E+01 TM 21 31660 09/18/96 Zr-95 4.11E+00 2.74E+00 8.42E+00 TM 04 32287 10/16/96 Ag-110M -3.15E+00 2.23E+00 9.38E+00 l

TM 04 32287 10/16/96 Ba-140 -0.40E+00 3.32E+00 1.32E+01 TM 04 32287 10/16/96 Be-7 -1.71E+00 1.60E+01 5.77E+01 TM 04 32287 10/16/96 Ce-141 -1.32E+00 2.63E+00 8.73E+00 TM 04 32287 10/16/96 Ce-144 8.30E+00 1.04E+01 3.20E+01 7M 04 32287 10/16/96 Co-57 -1,33E+00 1.30E+00 4.34E+00 TM 04 32287 10/16/96 Co-58 2.21E+00 2.35E+00 7.65E+00 TM 04 32287 10/16/96 Co-60 -0.27E+00 2.38E+00 9.13E+00 TM 04 32287 10/16/96 Cr-51 -2.20E+01 1.67E+01 6.28E+01 TM 04 32287 10/16/96 Cs-134 -0.73E+00 1.60E+00 6.01E+00 TM 04 32287 10/16/96 Cs-137 5.02E+00 2.43E+00 7.65E+00 TM 04 32287 10/16/96 Fe-59 3.40E+00 6.47E+00 2.32E+01 TM 04 32287 10/16/96 I-131 3.26E-02 6.31E-02 0.33E+00 TM 04 32287 10/16/96 K-40 1.30E+03 8.97E+01 1.20E+02

TM 04 32287 10/16/96 Mn-54 -1.70E+00 1.41E+00 5.95E+00 TM 04 32287 10/16/96 Ru-103 -1.09E+00 1.79E+00 6.80E+00 TM 04 32287 10/16/96 Ru-106 -8.87E+00 1.51E+01 6.06E+01 1 TM 04 32287 10/16/96 Sb-124 0.30E+00 2.80E*00 1.25E+01 TM 04 32287 10/16/96 Se-75 -1.56E+00 2.27E+00 8.11E+00 1 TM 04 32287 10/16/96 Th-232 -5.37E+00 7.09E+00 2.75E+01 ,

TM 04 32287 10/16/96 Zn-65 5.34E+00 4.93E+00 1.65E+01 l TM 04 32287 10/16/96 Zr-95 4.13E+00 3.23E+00 1.09E+01 '

TM 09 32288 10/16/96 Ag-110M -0.66E+00 1.93E+00 7.09E+00 TM 09 32288 10/16/96 Ba-140 2.04E+00 )

-3.73E+00 9.68E+00 i TM 09 32288 10/16/96 Be-7 -9.87E+00 1.05E+01 4.07E+01 TM 09 32288 10/16/96 Ce-141 -2.30E+00 2.25E+00 7.6BE+00 TM 09 32288 10/16/96 Ce-144 9.95E+00 8.74E+00 2.66E+01 TM 09 32288 10/16/96 Co-57 0.49E+00 1.12E+00 3.53E+00 TM 09 32288 10/16/96 Co-58 2.38E+00 1.45E+00 4.42E+00 TM 09 32288 10/16/96 Co-60 1.34E+00 1.32E+00 4.54E+00 TM 09 32288 10/16/96 Cr-51 -6.71E+00 1.27E+01 4.60E+01 TM 09 32288 10/16/96 Cs-134 -1.49E+00 1.26E+00 5.10E+00 TM 09 32288 10/16/96 Cs-137 1.80E+00 1.60E+00 5.47E+00 TM 09 32288 10/16/96 Fe-59 0.58E+00 4.63E+00 1.71E+01 TM 09 32288 10/16/96 I-131 5.03E-02 6.06E-02 0.29E+00 TM 09 32288 10/16/96 K-40 1.41E+03 7.38E+01 8.07E+01

TM 09 32288 10/16/96 Mn-54 -1.25E+00 1.26E+00 4.92E+00 TM 09 32288 10/16/96 Ru-103 -0.72E+00 1.40E+00 5 23E+00 TM 09 32288 10/16/96 Ru-106 -1.52E+01 1.17E+01 4.89E+01 TM 09 32288 10/16/96 Sb-124 -1.74E+00 2.53E+00 1.15E+01 TM 09 32288 10/16/96 Se-75 -0.63E+00 1.76E+00 6.20E+00 TM 09 32288 10/16/96 Th-232 0.25E+00 5.45E+00 1.96E+01 TM 09 32288 10/16/96 Zn-65 3.03E+00 3.36E+00 1.15E+01 TM 09 32288 10/16/96 Zr-95 -0.48E+00 2.68E+00 9.60E+00

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations). j

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg)

_____________________________________________________________________(pCi/kg)

TM 15 32289 10/16/96 Ag-110M -0.92E+00 1.71E+00 6.64E+00 TM 15 32289 10/16/96 Ba-140 1.80E+00 2.40E+00 8.45E+00 TM 15 32289 10/16/96 Be-7 1.20E+01 1.24E+01 4.11E+01 i TM 15 32289 10/16/96 Ce-141 -5.60E+00 2.52E+00 8.90E+00 TM 15 32289 10/16/96 Ce-144 -2.36E+01 9.21E+00 3.30E+01 TM 15 32289 10/16/96 Co-57 -0.12E+00 1.17E+00 3.80E+00 TM 15 32289 10/16/96 Co-58 -2,12E+00 1.50E+00 5.99E+00 i

TM 15 32289 10/16/96 Co-60 -3.17E+00 1.16E+00 6.13E+00 TM 15 32289 10/16/96 Cr-51 1.27E+00 1.49E+01 5.17E+01 TM 15 32289 10/16/96 Cs-134 -0.69E+00 1.31E+00 5.04E+00 i TM 15 32289 10/16/96 Cs-137 2.51E+00 1.50E+00 4.85E+00 l l

TM 15 32289 10/16/96 Fe-59 1.09E+01 4.61E+00 1.29E+01 TM 15 32289 10/16/96 I-131 1.98E-02 4.67E-02 0.24E+00 i TM 15 32289 10/16/96 K-40 1.73E+03 8.40E+01 7.99E+01 * !

TM 15 32289 10/16/96 Mn-54 -1.71E+00 1.28E+00 5.21E+00 TM 15 32289 10/16/96 Ru-103 2.27E+00 1.50E+00 4.76E+00 TM 15 32289 10/16/96 Ru-106 -1.32E+01 1.28E+01 5.24E+01 TM 15 32289 10/16/96 Sb-124 -0.62E+00 2.87E+00 1.21E+01 l TM 15 32289 10/16/96 Se-75 -0.49E+00 1.90E+00 6.66E+00 TM 15 32289 10/16/96 Th-232 0.00E+00 5.86E+00 2.09E+01 TM 15 32289 10/16/96 Zn-65 -1.71E+00 3.54E+00 1.36E+01 TM 15 32289 10/16/96 Zr-95 0.26E+00 2.84E+00 9.99E+00 1 TM 16 32290 10/16/96 Ag-110M 1.54E+00 2.12E+00 7.32E+00 TM 16 32290 10/16/96 Ba-140 -1.58E+00 1.85E+00 8.55E+00 TM 16 32290 10/16/96 Be-7 -2.28E+01 1.28E+01 5.10E+01 TM 16 32290 10/16/96 Ce-141 -2.90E+00 2.85E+00 9.59E+00 l TM 16 32290 10/16/96 Ce-144 -2,42E+01 9.14E+00 3.27E+01 l TM 16 32290 10/16/96 Co-57 1.21E+00 1.33E+00 4.07E+00 TM 16 32290 10/16/96 Co-58 -3.81E+00 1.58E+00 6.57E+00 TM 16 32290 10/16/96 Co-60 -1.71E+00 1.66E+00 6.70E+00 TM 16 32290 10/16/96 Cr-51 7.10E+00 1.40E+01 4.75E+01 TM 16 32290 10/16/96 Cs-134 2.46E+00 1.73E+00 4.89E+00 TM 16 32290 10/16/96 Cs-137 7.02E+00 2.70E+00 9.37E+00 TM 16 32290 10/16/96 Fe-59 2.94E+00 5.53E+00 1.90E+01 ;

TM 16 32290 10/16/96 I-131 8.48E-03 3.71E-02 0.21E+00 TM 16 32290 10/16/96 K-40 2.05E+03 {

9.07E+01 9.60E+01

l TM 16 32290 20/16/96 Mn-54 0.96E+00 1.69E+00 5.64E+00 TM 16 32290 10/16/96 Ru-103 -0.13E+00 1.74E+00 6.20E+00 i TM 16 32290 10/16/96 Ru-106 -1.37E+01 1.37E+01 5.50E+01 l TM 16 32290 10/16/96 Sb-124 -1.50E+00 2.65E+00 1.21E+01 TM 16 32290 10/16/96 Se-75 0.19E+00 2.23E+00 7.55E+00 TM 16 32290 10/16/96 Th-232 -0.90E+00 5.74E+00 2.14E+01 ,

TM 16 32290 10/16/96 Zn-65 -0.88E+00 3.10E+00 1.20E+01 l TM 16 32290 10/16/96 Zr-95 5.84E+00 2.52E+00 6.97E+00 TM 20 32291 10/16/96 Ag-110M 2.26E+00 1.46E+00 4.46E+00 TM 20 32291 10/16/96 Ba-140 2.06E+00 2.21E+00 7.61E+00 TM 20 32291 10/16/96 Be-7 2.17E+01 1.09E+01 3.29E+01 TM 20 32291 10/16/96 Ce-141 2.62E+00 2.37E+00 7.29E+00 TM 20 32291 10/16/96 Ce-144 7.90E+00 9.02E+00 2.78E+01

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

I

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 09 29294 05/08/96 Ag-110M -0.79E+00 1.84E+00 6.71E+00 TM 09 29294 05/08/96 Ba-140 -2.85E+00 1.86E+00 7.84E+00 TM 09 29294 05/08/96 Be-7 -1.11E+01 1.01E+01 3.76E+01 TM 09 29294 05/08/96 Ce-141 3.28E+00 2.31E+00 7.36E+00 TM 09 29294 05/08/96 Ce-144 -8.85E+00 8.38E+00 2.83E+01 TM 09 29294 05/08/96 Co-57 -0.44E+00 1.06E+00 3.52E+00 TM 09 29294 05/08/96 Co-58 0.76E+00 1.07E+00 3.64E+00 TM 09 29294 05/08/96 Co-60 -1.06E+00 1.19E+00 4.56E+00 TM 09 29294 05/08/96 Cr-51 -8.41E+00 1.15E+01 4.14E+01 TM 09 29294 05/08/96 Cs-134 1.41E+00 2.33E+00 6.93E+00 l TM 09 29294 05/08/96 Cs-137 0.65E+00 1.33E+00 4.81E+00

! TM 09 29294 05/08/96 Fe-59 -2.17E+00 3.73E+00 1.37E+01 l TM 09 29294 05/08/96 I-131 7.90E-02 5.19E-02 0.15E+00 TM 09 29294 05/08/96 K-40 1.32E+03 5.17E+01 5.64E+01

TM 09 29294 05/08/96 Mn-54 0.69E+00 1.19E+00 4.15E+00 TM 09 29294 05/08/96 Ru-103 -3.06E+00 1.31E+00 5.13E+00 TM 09 29294 05/08/96 Ru-106 -2.09E+00 1.06E+01 3.98E+01 '

i TM 09 29294 05/08/96 Sb-124 -2.00E+00 2.24E+00 9.42E+00 I TM 09 29294 05/08/36 Se-75 0.33E+00 1.76E+00 6.06E+00 i TM 09 29294 05/08/96 Th-232 -6.16E+00 4.48E+00 1.72E+01 j l TM 09 29234 05/08/96 Zn-65 -3.88E+00 3.11E+00 1.18E+01 i TM 09 29294 05/08/96 Zr-95 3.05E+00 2.04E+00 6.55E+00 )

l TM 15 29295 05/08/96 Ag-110M 1.01E+00 2.58E+00 9.61E+00 !

TM 15 29295 05/08/96 Ba-140 0.44E+00 2.83E+00 1.09E+01 I TM 15 29295 05/08/96 Be-7 -3.79E+00 1.49E+01 5.50E+01 1 TM 15 29295 05/08/96 Ce-141 1.10E+00 2.44E+00 7.67E+00 I TM 15 29295 05/08/96 Ce-144 1.18E+00 8.94E+00 2.81E+01 TM 15 29295 05/08/96 Co-57 0.62E+00 1.25E+00 3.86E+00 TM 15 29295 05/08/96 Co-58 2.10E+00 1.86E+00 6.55E+00 TM 15 29295 05/08/96 Co-60 -1.63E+00 1.70E+00 7.29E+00 TM 15 29295 05/08/96 Cr-51 -7.60E+00 1.50E+01 5.28E+01 TM 15 29295 05/08/96 Cs-134 -0.95E+00 1.64E+00 6.25E+00 TM 15 29295 05/08/96 Cs-137 2.91E+00 1.96E+00 6.50E+00 i TM 15 29295 05/08/96 Fe-59 -0.49E+00 5.84E+00 2.22E+01 l TM 15 29295 05/08/96 I-131 8.04E-02 5.76E-02 0.19E+00 TM 15 29295 05/08/96 K-40 1.48E+03 8.13E+01 9.94E+01

TM 15 29295 05/08/96 Mn-54 1.77E+00 1.91E+00 6.81E+00 TM 15 29295 05/08/96 Ru-103 -1.44E+00 1.86E+00 7.08E+00 l TM 15 29295 05/08/96 Ru-106 -6.69E+00 1.46E+01 5.58E+01 j TM 15 29295 05/08/96 Sb-124 -1.64E+00 4.79E+00 1.90E+01 l TM 15 29295 05/08/96 Se-75 -1.76E+00 2.00E+00 7.05E+00 i

TM 15 29295 05/08/96 Th-232 -0.96E+00 6.43E+00 2.37E+01 l TM 15 29295 05/08/96 Zn-65 1.85E+01 8.83E+00 3.28E+01 TM 15 29295 05/08/96 Zr-95 6.10E+00 3.31E+00 1.09E+01 l TM 16 29296 05/08/96 Ag-110M -0.47E+00 1.50E+00 5.37E+00 TM 16 29296 05/08/96 Ba-140 2.14E+00 1.47E+00 4.75E+00 TM 16 29296 05/08/96 Be-7 -1.92E+00 9.28E+00 3.35E+01 TM 16 29296 05/08/96 Ce-141 1.08E+00 2.04E+00 6.65E+00 TM 16 29296 05/08/96 Ce-144 -2.35E+00 7.31E+00 2.44E+01

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

i l

.m_ __ _ _ . _ _ m _ _ ._ _ _ . - . _ ___ ..__ _ _ _ __ _ _ _ _._ _.__.__ _ ._ _._.._._

Seabrook Nuclear Power Station ,

Radiological Environmental Monitoring Lsta (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 16 29296 05/08/96 Co-57 -0.83E+00 0.98E+00 3.30E+00 ;

TM 16 29296 05/08/96 Co-58 -0.77E+00 1.25E+00 4.50E+00 '

TM 16 29296 05/08/96 Co-60 9.34E-03 1.28E+00 4.81E+00 TM 16 29296 05/08/96 Cr 9.66E+00 1.12E+01 3.80E+01 TM 16 29296 05/08/96 Cs-134 -6.74E+00 2.28E+00 8.72E+00

, TM 16 29296 05/08/96 Cs-137 3.09E+00 1.67E+00 6.26E+00 l TM 16 29296 05/08/96 Fe-59 -4.75E+00 3.87E+00 1.54E+01 I

TM 16 29296 05/08/96 I-131 8.54E-02 5.61E-02 0.16E+00 TM 16 29296 05/08/96 K-40 1.72E+03 5.69E+01 4.75E+01

TM 16 29296 05/08/96 Mn-54 1.48E+00 1.0BE+00 3.48E+00 TM 16 29296 05/08/96 Ru-103 -0.88E+00 1.16E+00 4.28E+00 TM 16 29296 05/08/96 Ru-106 1.27E+00 1.03E+01 3.79E+01 TM 16 29296 05/08/96 Sb-124 -3.26E+00 2.51E+00 1.06E+01 TM 16 29296 05/08/96 Se-75 1.73E+00 1.36E+00 4.33E+00 TM 16 29296 05/08/96 Th-232 -7.78E+00 4.48E+00 1.70E+01 TM 16 29296 05/08/96 Zn-65 1.00E+01 5.28E+00 2.03E+01 TM 16 29296 05/08/96 Zr-95 5.22E+00 2.00E+00 5.89E+00 TM 20 29297 05/08/96 Ag-110M 2.95E+00 1.45E+00 4.61E+00 TM 20 29297 05/08/96 Ba-140 -5.36E+00 1.97E+00 8.62E+00 '

TM 20 29297 05/08/96 Be-7 4.15E+00 8.67E+00 3.03E+01 ;

TM 20 29297 05/08/96 Ce-141 -0.83E+00 2.01E+00 G.71E+00 ;

TM 20 29297 05/08/96 Ce-144 1.54E+01 7.41E+00 2.30E+01 i TM 20 29297 05/08/96 Co-57 1.97E+00 0.95E+00 2.95E+00 TM 20 29297 05/08/96 Co-58 -1.38E+00 1.12E+00 4.18E+00 .

TM 20 29297 05/08/96 Co-60 0.58E+00 1.31E+00 4.77E+00 TM 20 29297 05/08/96 Cr-51 3.45E+00 1.18E+01 4.0BE+01 TM 20 29297 05/08/96 Cs-134 0.97E+00 1.96E+00 5.87E+00 l TM 20 29297 05/08/96 Cs-137 1.60E+00 1.09E+00 3.73E+00 TM 20 29297 05/08/96 Fe-59 -2.13E+00 3.45E+00 1.34E+01 TM 20 29297 05/08/96 I-131 5.00E-02 6.94E-02 0.25E+00 TM 20 29297 05/08/96 K-40 1.27E+03 4.88E+01 5.0BE+01 * ,

TM 20 29297 05/08/96 Mn-54 1.33E+00 0.94E+00 3.05E+00 ;

TM 20 29297 05/08/96 Ru-103 -2.49E+00 1.27E+00 4.86E+00 TM 20 29297 05/08/96 Ru-106 -1.37E+01 1.02E+01 4.02E+01 TM 20 29297 05/08/96 Sb-124 2.52E+00 2.50E+00 8.69E+00 TM 20 29297 05/08/96 Se-75 0.82E+00 1.53E+00 5.23E+00 l TM 20 29297 05/08/96 Th-232 3.83E+00 4.17E+00 1.e3E+01 TM 20 29297 05/08/96 Zn-65 -0.93E+00 2.82E+00 1.03E+01 TM 20 29297 05/08/96 Zr-95 -1.84E+00 1.64E+00 6.26E+00 TM 21 29298 05/08/96 Ag-110M 0.18E+00 1.77E+00 6.28E+00 TM 21 29298 05/08/96 Ba-140 1.21E+00 1.55E+00 5.50E+00 TM 21 29298 05/08/96 Be-7 10.0E+00 9.14E+00 3.08E+01 TM 21 29298 05/08/96 Ce-141 -1.37E+00 2.24E+00 7.50E+00 TM 21 29298 05/08/96 Ce-144 -1.65E+00 7.64E+00 2.52E+01 TM 21 29298 05/08/96 Co-57 -0.83E+00 1.02E+00 3.40E+00 TM 21 29298 05/08/96 Co-58 -0.46E+00 1.09E+00 3.92E+00 TM 21 29298 05/08/96 Co-60 -0.48E+00 1.22E+00 4.47E+00 l TM 21 29298 05/08/96 Cr-51 -7.56E+00 1.11E+01 3.96E+01 i TM 21 29298 05/08/96 Cs-134 -0.47E+00 2.10E+00 6.49E+00

Radioactivity detected (i . e . , Concentration > 3 Std. Deviations).

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 21 29298 05/08/96 Cs-137 0.28E+00 1.14E+00 4.16E+00 TM 21 29298 05/08/96 Fe-59 -7.58E+00 3.62E+00 1.42E+01 TM 21 29298 05/08/96 I-131 3.06E-02 5.79E-02 0.21E+00 TM 21 29298 05/08/96 K-40 1.40E+03 5.04E+01 5.44E+01

TM 21 29298 05/08/96 Mn-54 0.18E+00 1.05E+00 3.76E+00 TM 21 29298 05/08/96 Ru-103 -3.32E+00 1.21E+00 4.78E+00 TH 21 29298 05/08/96 Ru-106 2.06E+00 9.91E+00 3.63E+01 TM 21 29298 05/08/96 Sb-124 0.90E+00 1.91E+00 7.15E+00 TM 21 29298 05/08/96 Se-75 -0.20E+00 1.61E+00 5.58E+00 TM 21 29298 05/08/96 Th-232 -1.85E+00 4.29E+00 1.57E+01 TM 21 29298 05/08/96 Zn-65 -0.67E+00 2.61E+00 9.51E+00 TM 21 29298 05/08/96 Zr-95 -1.80E+00 1.76E+00 6.58E+00 TM 04 29555 05/22/96 Ag-110M 0.46E+00 1.34E+00 4.59E+00 l TM 04 29555 05/22/96 Ba-140 1.71E+00 2.10E+00 7.27E+00 TM 04 29555 05/22/96 Be-7 -5.27E+00 7.59E+00 2.68E+01 TM 04 29555 05/22/96 Ce-141 -2.75E+00 1.63E+00 5.43E+00 TM 04 29555 05/22/96 Ce-144 -4.89E+00 4.71E+00 1.55E+01 TM 04 29555 05/22/96 Co-57 -0.22E+00 0.60E+00 1.95E+00 TM 04 29555 05/22/96 Co-58 -0.95E+00 0.86E+00 3.06E+00 TM 04 29555 05/22/96 Co-60 -0.80E+00 0.99E+00 3.71E+00 l TM 04 29555 05/22~)6 Cr-51 3.32E+00 9.73E+00 3.30E+01 TM 04 29555 05/22/96 Cs-134 -4.02E-02 0.77E+00 2.76E+00 TM 04 29555 05/22/96 Cs-137 5.03E+00 1.23E+00 4.13E+00

TM 04 29555 05/22/96 Fe-59 2.19E+00 3.4BE+00 1.22E+01 TM 04 29555 05/22/96 I-131 -8.82E-03 2.94E-02 0.14E+00 TM 04 29555 05/22/96 K-40 1.34E+03 3.61E+01 3.77E+01

TM 04 29555 05/22/96 Mn-54 -0.25E+00 0.78E+00 2.68E+00 TM 04 29555 05/22/96 Ru-103 -2.30E+00 1.34E+00 4.92E+00 TM 04 29555 05/22/96 Ru-106 4.60E+00 7.16E+00 2.52E+01 l

TM 04 29555 05/22/96 Sb-124 -0.39E+00 1.78E+00 6.71E+00 l TM 04 29555 05/22/96 Se-75 0.14E+00 0.93E+00 3.02E+00 l TM 04 29555 05/22/96 Th-232 6.29E+00 3.46E+00 1.13E+01 TM 04 29555 05/22/96 Zn-65 0.95E+00 1.97E+00 6.80E+00 TM 04 29555 05/22/96 Zr-95 -0.56E+00 1.65E+00 5.65E+00 TM 09 29556 05/22/96 Ag-110M 2.31E+00 1.58E+00 5.22E+00 TM 09 29556 05/22/96 Ba-140 1.12E+00 1.51E+00 5.39E+00 TM 09 29556 05/22/96 Be-7 -8.06E+00 8.73E+00 3.25E+01 TM 09 29556 05/22/96 Ce-141 -3.63E+00 2.11E+00 7.26E+00 TM 09 29556 05/22/96 Ce-144 -5.75E+00 7.30E+00 2.45E+01 TM 09 29556 05/22/96 Co-57 -1.65E+00 0.95E+00 3.2SE+00 TM 09 29556 05/22/96 Co-58 -2.12E+00 1.00E+00 3.96E+00 TM 09 29556 05/22/96 Co-60 0.26E+00 1.24E+00 4.37E+00 TM 09 29556 05/22/96 Cr-51 -1.23E+01 1.11E+01 4.00E+01 TM 09 29556 05/22/96 Cs-134 1.07E+00 1.03E+00 3.62E+00 TM 09 29556 05/22/96 Cs-137 2.34E+00 3.24E+00 4.16E+00 TM 09 29556 05/22/96 Fe-59 0.70E+00 3.46E+00 1.21E+01 TM 09 29556 05/22/96 I-131 1.69E-02 3.10E-02 0.12E+00 TM 09 29556 05/22/96 K-40 1.27E+03 4.79E+01 5.0BE+01

TM 09 29556 05/22/96 Mn-54 0.28E+00 1.22E+00 4.30E+00

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 09 29556 05/22/96 Ru-103 -2.25E+00 1.17E+00 4.50E+00 TM 09 29556 05/22/96 Ru-106 -3.93E+00 1.03E+01 3.84E+01 TM 09 29556 05/22/96 Sb-124 0.15E+00 2.16E+00 8.2?E+00 TH 09 29556 05/22/96 Se-75 2.39E+00 1.51E+00 4.96E+00 TM 09 29556 05/22/96 Th-232 -6.94E+00 4.06E+00 1.58E+01 TM 09 29556 05/22/96 Zn-65 -5.06E+00 2.68E+00 1.05E+01 TM 09 29556 05/22/96 Zr-95 0.97E+00 1.91E+00 6.49E+00 TM 15 29557 05/22/96 Ag-110M 0.00E+00 2.27E+00 8.52E+00 TM 15 29557 05/22/96 Ba-140 -0.61E+00 2.05E+00 8.16E+00 TM 15 29557 05/22/96 Be-7 -6.75E+00 1.30E+01 4.76E+01 TM 15 29557 05/22/96 Ce-141 -0.87E+00 2.06E+00 6.59E+00 TM 15 29557 05/22/96 Ce-144 -1.71E+01 7.18E+00 2.42E+01 TM 15 29557 05/22/96 Co-57 -1.54E+00 0.94E+00 3.10E+00 TM 15 29557 05/22/96 Co-58 -0.95E+00 1.47E+00 5.83E+00 TM 15 29557 05/22/96 Co-60 -1.04E+00 2.03E+00 7.71E+00 TM 15 29557 05/22/96 Cr-51 8.33E+00 1.11E+01 3.66E+01 TM 15 29557 05/22/96 Cs-134 -2.38E+00 1.83E+00 7.18E+00 TM 15 29557 05/22/96 Cs-137 3.62E+00 1.47E+00 4.48E+00 TM 15 29557 05/22/96 Fe-59 -4.82E+00 4.54E+00 1.82E+01 TM 15 29557 05/22/96 I-131 -1.30E-02 4.01E-02 0.20E+00 TM 15 29557 05/22/96 K-40 1.67E+03 7.26E+01 7.85E+01

TM 15 29557 05/22/96 Mn-54 0.19E+00 1.57E+00 5.88E+00 TM 15 29557 05/22/96 Ru-103 -0.17E+00 1.65E+00 5.90E+00 TM 15 29557 05/22/96 Ru-106 -1.60E+00 1.23E+01 4.52E+01 TM 15 29557 05/22/96 Sb-124 0.50E+00 2.84E+00 1.10E+01 TM 15 29557 05/22/96 Se-75 1.70E+00 1.75E+00 5.65E+00 TM 15 29557 05/22/96 Th-232 0.86E+00 5.70E+00 2.02E+01 TM 15 29557 05/22/96 Zn-65 -7.55E+00 3.73E+00 1.52E+01 TM 15 29557 05/22/96 Zr-95 -6.29E+00 2.89E+00 1.21E+01 TM 16 29558 05/22/96 Ag-110M 2.41E+00 1.41E+00 4.45E+00 TM 16 29558 05/22/96 Ba-140 0.29E+00 1.23E+00 4.56E+00 TM 16 29558 05/22/96 Be-7 -2,14E+00 8.09E+00 2.93E+01 TM 16 29558 05/22/96 Ce-141 -1.98E+00 1.84E+00 6.24E+00 TM 16 29558 05/22/96 Ce-144 2.64E+00 6.92E+00 2.25E+01 TM 16 29558 05/22/96 Co-57 0.58E+00 0.92E+00 2.97E+00 TM 16 29558 05/22/96 Co-58 -0.67E+00 1.13E+00 4.04E+00 TM 16 29558 05/22/96 Co-60 -1.49E+00 1.31E+00 5.16E+00 TM 16 29558 05/22/96 Cr-51 -4.62E+00 1.06E+01 3.74E+01 TM 16 29558 05/22/96 Cs-134 -1.40E+00 1.83E+00 5.82E+00 TM 16 29558 05/22/96 Cs-137 4.74E+00 1.62E+00 5.87E+00 TM 16 29558 05/22/96 Fe-59 -0.59E+00 3.72E+00 1.38E+01 TM 16 29558 05/22/96 I-131 1.58E-02 4.36E-02 0.17E+00 TM 16 29558 05/22/96 K-40 1.84E+03 5.65E+01 5.78E+01

TM 16 29558 05/22/96 Mn-54 1.45E+00 0.98E+00 3.13E+00 TM 16 29558 05/22/96 Ru-103 -0.96E+00 1.09E+00 4.04E+00 TM 16 29558 05/22/96 Ru-106 -0.98E+00 1.00E+01 3.71E+01 TM 16 29558 05/22/96 Sb-124 1.73E+00 2.44E+00 B 6BE+00 TM 16 29558 05/22/96 Se-75 1.82E+00 1.29E+00 4.07E+00 TM 16 29558 05/22/96 Th-232 1.72E+00 4.07E+00 1.39E+01

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

- .__ - _m _ _ __ _ _ _ . _ __ , . .

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg) l l TM 16 29558 05/22/96 Zn-65 -1.12E+00 2.84E+00 1.03E+01 TM 16 29558 05/22/96 Zr-95 3.40E+00 1.91E+00 6.01E+00 TM 20 29559 05/22/96 Ag-110M -0.18E+00 1.76E+00 6.31E+00 TM 20 29559 05/22/96 Ba-140 0.93E+00 1.73E+00 6.24E+00 TM 20 29559 05/22/96 Be-7 -3.73E+00 9.70E+00 3.50E+01 TM 20 29559 05/22/96 Ce-141 0.98E+00 2.27E+00 7.34E+00 1 TM 20 29559 05/22/96 Ce-144 -5.BBE+00 8.10E+00 2.71E+01 TM 20 29559 05/22/96 Co-57 -1.86E+00 1.07E+00 3.66E+00 TM 20 29559 05/22/96 Co-58 0.31E+00 1.25E+00 4.29E+00 TM 20 29559 05/22/96 Co-60 -0.73E+00 1.36E+00 5.22E+00 TM 20 29559 05/22/96 Cr-51 -2.57E+00 1.16E+01 4.09E+01 I TM 20 29559 05/22/96 Cs-134 -2.45E-02 3.59E+00 1.30E+01 TM 20 29559 05/22/96 Cs-137 -1.42E+00 1.34E+00 5.14E+00 TM 20 29559 05/22/96 Fe-59 -0.89E+00 3.89E+00 1.46E+01 TM 20 29559 05/22/96 I-131 2.00E-02 3.84E-02 0.15E+00 TM 20 29559 05/22/96 K-40 1.32E+03 5.03E+01 5.78E+01

i TM 20 29559 05/22/96 Mn-54 6.38E-02 1.09E+00 3.79E+00

, TM 20 29559 05/22/96 Ru-103 -2.24E+00 1.26E+00 4.80E+00 j TM 20 29559 05/22/96 Ru-106 -3.18E+01 1.09E+01 4.52E+01 1

[

TM 20 29559 05/22/96 Sb-124 1.40E+00 2.60E+00 9.38E+00 TM 20 29559 05/22/96 Se-75 0.82E+00 1.64E+00 5.57E+00 TM 20 29559 05/22/96 Th-232 9.08E+00 4.85E+00 1.57E+01 i TM 20 29559 05/22/96 Zn-65 -0.16E+00 6.49E+00 2.42E+01

! TM 20 29559 05/22/96 Zr-95 -0.44E+00 1.96E+00 6.95E+00 j TM 21 29560 05/22/96 Ag-110M -1.25E+00 1.50E+00 5.65E+00 TM 21 29560 05/22/96 Ba-140 3.29E+00 1.55E+00 4.74E+00 TM 21 29560 05/22/96 Be-7 1.45E+01 9.59E+00~ 3.17E+01 l TM 21 29560 05/22/96 Ce-141 -3.32E+00 2.17E+00 7.42E+00 TM 21 29560 05/22/96 Ce-144 -6.45E+00 7.54E+00 2.53E+01 TM 21 29560 05/22/96 Co-57 0.74E+00 0.96E+00 3.10E+00 TM 21 29560 05/22/96 Co-58 0.16E+00 1.10E+00 3.83E+00 TM 21 29560 05/22/96 Co-60 -1.32E+00 1.12E+00 4.34E+00

, TM 21 29560 05/22/96 Cr-51 6.68E+00 1.19E+01 4.07E+01 l TM 21 29560 05/22/96 Cs-134 -0.40E+00 1.09E+00 4.04E+00 l TM 21 29560 05/22/96 Cs-137 -1.55E+00 1.25E+00 4.83E+00 TM 21 29560 05/22/96 Fe-59 -0.40E+00 3.19E+00 1.15E+01 TM 21 29560 05/22/96 I-131 1.84E-02 3.37E-02 0.13E+00

! TM 21 29560 05/22/96 K-40 1.31E+03 4.88E+01 5.30E+01

TM 21 29560 05/22/96 Mn-54 -0.61E+00 1.23E+00 4.48E+00 TM 21 29560 05/22/96 Ru-103 -2.79E+00 1.2SE+00 4.84E+00 TM 21 29560 05/22/96 Ru-106 -8.44E+00 1.01E+01 3.86E+01 TM 21 29560 05/22/96 Sb-124 1.35E+00 2.15E+00 7.82E+00 TM 21 29560 05/22/96 Se-75 2.70E+00 1.59E+00 5.21E+00 TM 21 29560 05/22/96 Th-232 -0.46E+00 4.00E+00 1.45E+01 TM 21 29560 05/22/96 Zn-65 -3.88E+00 2.55E+00 9.91E+00 TM 21 29560 05/22/96 Zr-95 1.71E+00 2.04E+00 6.78E+00 TM 04 29747 06/05/96 Ag-110M -1.91E-02 1.63E+00 5.92E+00 TM 04 29747 06/05/96 Ba-140 0.92E+00 1.485+00 5.37E+00 Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

-- ~ n.- . . , - ~ - . . .,

l l

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pci/kg)

______________________________________________________________________________ i TM 04 29747 06/05/96 Be-7 1.62E+01 8.82E+00 2.85E+01 ,

TM 04 29747 06/05/96 Ce-141 2.04E-02 2.00E+00 6.60E+00 !

TM 04 29747 06/05/96 Ce-144 -2.59E+00 7.65E+00 2.55E+01 TM 04 29747 06/05/96 Co-57 0.32E+00 1.01E+00 3.29E+00 TM 04 29747 06/05/96 Co-58 -2.77E+00 1.07E+00 4.36E+00 TM 04 29747 06/05/96 Co-60 1.48E+00 1.40E+00 4.90E+00 TM 04 29747 06/05/96 Cr-51 1.99E+01 1.11E+01 3.61E+01 TM 04 29747 06/05/96 Cs-134 -1.00E+00 1.69E+00 5.45E+00 TM 04 29747 06/05/96 Cs-137 3.34E+00 1.81E+00 6.50E+00 ,

TM 04 29747 06/05/96 Fe-59 -9.44E+00 3.81E+00 1.62E+01 '

TM 04 29747 06/05/96 I-131 2.48E-02 3.95E-02 0.15E+00 TM 04 29747 06/05/96 K-40 1.32E+03 5.33E+01 6.41E+01

TM 04 29747 06/05/96 Mn-54 -1.56E+00 1.17E+00 4.37E+00 TM 04 29747 06/05/96 Ru-103 -1.52E+00 1.13E+00 4.33E+00 TM 04 29747 06/05/96 Ru-106 -1.51E+01 1.02E+01 4.09E+01 TM 04 29747 06/05/96 Sb-124 0.51E+00 2.73E+00 1.02E+01 TM 04 29747 06/05/96 Se-75 -2.25E+00 1.52E+00 5.57E+00 '

TM 04 29747 06/05/96 Th-232 -1.07E+00 5.00E+00 1.81E+01 TM 04 29747 06/05/96 Zn-65 0.34E+00 2.67E+00 9.64E+00

-TM 04 29747 06/05/96 Zr-95 1.56E+00 1.73E+00 5.80E+00 TM 09 29748 06/05/96 Ag-110M 3.35E+00 1.49E+00 4.63E+00 l TM 09 29748 06/05/96 Ba-140 -0.89E+00 1.70E+00 6.66E+00 l TM 09 29748 06/05/96 Be-7 -0.98E+00 1.02E+01 3.62E+01 )

l TM 09 29748 06/05/96 Ce-141 1.15E+00 2.13E+00 6.94E+00 l TM 09 29748 06/05/96 Ce-144 1.07E+01 7.95E+00 2.52E+01 l TM 09 29748 06/05/96 Co-57 -0.26E+00 1.00E+00 3.32E+00 t TM 09 29748 06/05/96 Co-58 -0.84E+00 1.04E+00 3.86E+00 i TM 09 29748 06/05/96 Co-60 -0.48E+00 1.38E+00' 5.03E+00 l TM 09 29748 06/05/96 Cr-51 -7.05E+00 1.18E+01 4.19E+01 TM 09 29748 06/05/96 Cs-134 -1.86E+00 2.42E+00 7.62E+00 TM 09 29748 06/05/96 Cs-137 3.24E+00 1.62E+00 5.49E+00 TM 09' 29748 06/05/96 re-59 5.95E+00 3.89E+00 1.25E+01 TM 09 29748 06/05/96 I-131 -6.35E-03 3.16E-02 0.15E+00 TM 09 29748 06/05/96 K-40 1.34E+03 5.21E+01 5.77E+01

TM 09 29748 06/05/96 Mn-54 0.14E+00 1.20E+00 4.30E+00

' TM 09 29748 06/05/96 Ru-103 -2.75E+00 1.25E+00 4.88E+00 TM 09 29748 06/05/96 Ru-106 -1.10E+01 1.09E+01 4.22E+01 TM 09 29748 06/05/96 Sb-124 1.49E+00 2.23E+00 8.11E+00 TM 09 29748 06/05/96 Se-75 -1.41E+00 1.61E+00 5.75E+00 TM 09 29748 06/05/96 Th-232 2.06E+00 4.43E+00 1.56E+01 TM 09 29748 06/05/96 Zn-65 0.00E+00 3.14E+00 1.12E+01 TM 09 29748 06/05/96 Zr-95 -4.53E+00 1.88E+00 7.53E+00 TM 15 29749 06/05/96 Ag-110M 2.25E+00 2.52E+00 8.50E+00 TM 15 29749 06/05/96 Ba-140 1.62E+00 2.23E+00 8.08E+00 TM 15 29749 06/05/96 Be-7 -1.05E+01 1.24E+01 4.78E+01 TM 15 29749 06/05/96 Ce-141 1.03E+00 2.61E+00 8.58E+00 i TM 15 29749 06/05/96 Ce-144 -1.08E+01 9.71E+00 3.34E+01 i TM 15 29749 06/05/96 Co-57 -1.25E+00 1.29E+00 4.41E+00

) TM 15 29749 06/05/96 Co-58 1.41E+00 1.87E+00 6.35E+00 i

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l l

Seabrook Nuclear Pcwer Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE' CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 15 29749 06/05/96 Co-60 0.25E+00 2.06E+00 7.73E+00 TM 15 29749 06/05/96 Cr-51 8.91E+00 1.51E+01 5.24E+01 TM 15 29749 06/05/96 Cs-134 -0.82E+00 1.56E+00 5.87E+00 TM 15 29749 06/05/96 Cs-137 2.77E+00 1.26E+00 2.19E+00 TM 15 29749 06/05/96 Fe-59 3.89E+00 6.45E+00 2.29E+01 TM 15 29749 06/05/96 I-131 -1.50E-02 3.22E-02 0.16E+00 TM 15 29749 06/05/96 K-40 1.78E+03 8.63E+01 9.77E+01

TM 15 29749 06/05/96 Mn-54 2.54E+00 1.75E+00 5.63E+00 TM 15 29749 06/05/96 Ru-103 -2.58E+00 1.55E+00 6.27E+00 TM 15 29749 06/05/96 Ru-106 -1.51E+01 1.78E+01 6.94E+01 TM 15 29749 06/05/96 Sb-124 1.30E+00 3.61E+00 1.37E+01 TM 15 29749 06/05/96 Se-75 -1.70E+00 1.73E+00 6.18E+00 TM 15 29749 06/05/96 Th-232 -3.51E+00 7.13E+00 2.63E+01 TM 15 29749 06/05/96 Zn-65 -9.89E+00 5.16E+00 2.08E+01 TM 15 29749 06/05/96 Zr-95 -0.55E+00 3.23E+00 1.24E+01 TM 16 29750 06/05/96 Ag-110M -0.28E+00 1.26E+C0 4.57E+00 TM 16 29750 06/05/96 Ba-140 0.00E+00 1.19E+00 4.59E+00 TM 16 29750 06/05/96 Be-7 -1.12E+01 8.21E+00 3.15E+01 TM 16 29750 06/05/96 Ce-141 -4.50E+00 1.89E+00 6.67E+00 TM 16 29750 06/05/96 Ce-144 -1.24E+00 6.98E+00 2.32E+01 TM 16 29750 06/05/96 Co-57 -0.93E+00 0.97E+00 3.28E+00 TM 16 29750 06/05/96 Co-58 3.17E-02 1.17E+00 4.09E+00 TM 16 29750 06/05/96 Co-60 0.94E+00 1.36E+00 4.88E+00 TM 16 29750 06/05/96 Cr-51 8.32E+00 9.41E+00 3.20E+01 TM 16 29750 06/05/96 Cs-134 -2.26E+00 1.89E+00 6.16E+00 TM 16 29750 06/05/96 Cs-137 1.73E+00 1.26E+00 4.35E+00 TM 16 29750 06/05/96 Fe-59 -7.63E+00 3.89E+00 1.59E+01 TM 16 29750 06/05/96 I-131 6.57E-02 5.57E-02 0.17E+00 TM 16 29750 06/05/96 K-40 1.83E+03 5.94E+01 6.18E+01

l TM 16 29750 06/05/96 Mn-54 0.69E+00 0.91E+00 3.07E+00 TM 16 29750 06/05/96 Ru-103 -0.70E+00 1.15E+00 4.22E+00 TM 16 29750 06/05/96 Ru-106 2.17E+00 1.05E+01 3.82E+01 TM 16 29750 06/05/96 Sb-124 3.31E+00 1.95E+00 6.20E+00 TM 16 29750 06/05/96 Se-75 1.19E+00 1.36E+00 4.40E+00 TM 16 29750 06/05/96 Th-232 3.14E+00 4.03E+00 1.36E+01 l TM 16 29750 06/05/96 Zn-65 -2.54E+00 2.80E+00 1.06E+01 TM 16 29750 06/05/96 Zr-95 3.00E+00 1.95E+00 6.23E+00 TM 20 29751 06/05/96 Ag-110M 0.95E+00 1.57E+00 5.51E+00 TM 20 29751 06/05/96 Ba-140 1.54E+00 1.41E+00 4.90E+00 TM 20 29751 06/05/96 Be-7 2.12E+01 9.86E+00 3.14E+01 TM 20 29751 06/05/96 Ce-141 -0.18E+00 2.07E+00 6.85E+00 TM 20 29751 06/05/96 Ce-144 -5.02E+00 7.69E+00 2.59E+01 TM 20 29751 06/05/96 Co-57 -0.76E+00 1.03E+00 3.45E+00 TM 20 29751 06/05/96 Co-58 1.01E+00 1.11E+00 3.71E+00 TM 20 29751 06/05/96 Co-60 -0.70E+00 1.43E+00 5.51E+00 TM 20 29751 06/05/96 Cr-51 -9.05E+00 1.04E+01 3.79E+01 TM 20 29751 06/05/96 Cs-134 -3.52E+00 1.24E+00 5.06E+00 TM 20 29751 06/05/96 Cs-137 2.64E+00 1.36E+00 4.51E+00 i

TM 20 29751 06/05/96 Fe-59 -0.74E+00 3.99E+00 1.50E+01 1

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

.- .- ~ n, -

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 29751 06/05/96 I-131 0.22E+00 0.11E+00 0.24E+00 TM 20 29751 06/05/96 K-40 1.32E+03 5.31E+01 6.41E+01

TM 20 29751 06/05/96 Mn-54 -1.73E+00 1.13E+00 4.29E+00 TM 20 29751 06/05/96 Ru-103 -2.91E+00 1.26E+00 4.94E+00 TM 20 29751 06/05/96 Ru-106 -6.66E+00 1.05E+01 4.04E+01 TM 20 29751 06/05/96 Sb-124 2.53E+00 2.73E400 9.54E+00 TM 20 29751 06/05/96 Se-75 1.46E+00 1.51E+00 5.07E+00 TM 20 29751 06/05/96 Th-232 1.60E+00 4.73E+00 1.67E+01 TM 20 29751 06/05/96 Zn-65 -1.37E+00 2.74E+00 1.02E+01 TM 20 29751 06/05/96 Zr-95 -1.78E+00 2.00E+00 7.39E+00 TM 21 29752 06/05/96 Ag-110M 0.59E+00 1.66E+00 5.88E+00 TM 21 29752 06/05/96 Ba-140 -0.27E+00 1.60E+00 6.15E+00 TM 21 29752 06/05/96 Be-7 -3.93E+00 B.68E+00 3.19E+01 TM 21 29752 06/05/96 Ce-141 0.68E+00 2.15E+00 7.05E+00 TM 21 29752 06/05/96 Ce-144 7.84E+00 7.70E+00 2.47E+01 TM 21 29752 06/05/96 Co-57 0.49E+00 1.05E+00 3.41E+00 TM 21 29752 06/05/96 Co-58 -3.92E-02 1.13E+00 4.00E+00 TM 21 29752 06/05/96 Co-60 0.52E+00 1.32E+00 4.61E+00 TM 21 29752 06/05/96 Cr-51 -1.50E+01 1.13E+01 4.14E+01 TM 21 29752 06/05/96 Cs-134 -0.15E+00 1.94E+00 6.00E+00 TM 21 29752 06/05/96 Cs-137 1.93E+00 1.35E+00 4.64E+00 TM 21 29752 06/05/96 Fe-59 5.22E+00 3.58E+00 1.16E+01 TM 21 29752 06/05/96 I-131 -3.40E-02 2.90E-02 0.18E+00 l TM 21 29752 06/05/96 K-40 1.36E+03 5.27E+01 5.96E+01

1 TM 21 29752 06/05/96 Mn-54 -1.23E+00 1.19E+00 4.50E+00 TM 21 29752 06/05/96 Ru-103 -0.12E+00 1.22E+00 4.37E+00 TM 21 29752 06/05/96 Ru-106 -9.50E+00 1.07E+01 4.12E+01 TM 21 29752 06/05/96 Sb-124 2.93E+00 2.39E+00 8.14E+00 TM 21 29752 06/05/96 Se-75 1.76E+00 1.68E+00 5.64E+00 TM 21 29752 06/05/96 Th-232 -0.52E+00 4.92E+00 1.77E+01 TM 21 29752 06/05/96 Zn-65 -3.31E+00 2.80E+00 1.07E+01 TM 21 29752 06/05/96 Zr-95 -4.91E+00 1.96E+00 7.83E+00 TM 04 30053 06/19/96 Ag-110M -1.69E+00 1.41E+00 5.23E+00 TM 04 30053 06/19/96 Ba-140 -1.44E+00 1.67E+00 6.54E+00 TM 04 30053 06/19/96 Be-7 -1.53E+01 9.27E+00 3.30E+01 TM 04 30053 06/19/96 Ce-141 -1.38E+00 2.02E+00 1.17E+00 TM 04 30053 06/19/96 Ce-144 -7.04E+00 6.44Et00 1.92E+01 TM 04 30053 06/19/96 Co-57 0.12E+00 0.90E+00 2.56E+00 TM 04 30053 06/19/96 Co-58 -0.44E+00 1.09E+00 3.58E+00 TM 04 30053 06/19/96 Co-60 1.75E+00 1.19E+00 3.58E+00 TM 04 30053 06/19/96 Cr-51 -1.17E+01 1.06E+01 3.59E+01 TM 04 30053 06/19/96 Cs-134 -3.02E+00 1.03E+00 4.19E+00 i TM 04 30053 06/19/96 Cs-137 6.21E+00 1.75E+00 5.76E+00

l TM 04 30053 06/19/96 Fe-59 -1.77E+00 3.21E+00 1.12E+01 l TM 04 30053 06/19/96 I-131 0.19E+00 0.13E+00 0.29E+00 TM 04 30053 06/19/96 K-40 1.38E+03 5.30E+01 1.22E+01

TM 04 30053 06/19/96 Mn-54 -1.65E+00 0.98E+00 3.49E+00 TM 04 30053 06/19/96 Ru-103 -1.09E+00 1.06E+00 3.73E+00 TM 04 30053 06/19/96 Ru-106 0.00E+00 9.72E400 3.51E+01

Radioactivity detected (i . e. , Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996) i l

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 04 30053 06/19/96 Sb-124 -1.00E+00 1.95E+00 7.82E+00 TM 04 30053 06/19/96 Se-75 0.84E+00 1.32E+00 4.16E+00 l TM 04 30053 06/19/96 Th-232 -2.90E+00 4.40E+00 3.35E+00 TM 04 30053 06/19/96 Zn-65 2.66E+00 2.59E+00 8.32E+00 TM 04 30053 06/19/96 Zr-95 -0.38E+00 1.67E+00 5.53E+00 TM 09 30054 06/19/96 Ag-110M 1.46E+00 2.00E+00 6.30E+00 TM 09 30054 06/19/96 Ba-140 -1.33E+00 1.52E+00 7.05E+00 TM 09 30054 06/19/96 Be-7 0.00E+00 1.27E+01 4.26E+01 TM 09 30054 06/19/96 Ce-141 -0.35E+00 2.36E+00 1.88E+00 TM 09 30054 06/19/96 Ce-144 1.19E+01 8.4BE+00 2.33E+01 TM 09 30054 06/19/96 Co-57 -0.35E+00 1.12E+00 3.27E400 TM 09 30054 06/19/96 Co-58 -1.87E+00 1.45E+00 5.32E+00 TM 09 30054 06/19/96 Co-60 -0.59E+00 1.46E+00 5.69E+00 TM 09 30054 06/19/96 Cr-51 -5.45E+00 1.42E+01 4.75E+01 TM 09 30054 06/19/96 Cs-134 -0.49E+00 1.21E+00 4.29E+00 TM 09 30054 06/19/96 Cs-137 0.71E+00 1.60E+00 5.73E+00 TM 09 30054 06/19/96 Fe-59 -9.8BE+00 4.67E+00 1.98E+01 TM 09 30054 06/19/96 I-131 1.24E-02 6.8BE-02 0.29E+00 TM 09 30054 06/19/96 K-40 1.33E+03 7.31E+01 2.54E+01

TM 09 30054 06/19/96 Mn-54 1.82E+00 1.36E+00 4.06E+00 TM 09 30054 06/19/96 Ru-103 -0.72E+00 1.51E+00 5.28E+00 TM 09 30054 06/19/96 Ru-106 0.00E+00 1.36E+01 5.02E+01 TM 09 30054 06/19/96 Sb-124 -4.22E+00 2.97E+00 1.34E+01 TM 09 30054 06/19/96 Se-75 2.85E+00 1.83E+00 5.56E+00 TM 09 30054 06/19/96 Th-232 -0.24E+00 6.61E+00 6.67E+00 TM 09 30054 06/19/96 Zn-65 -7.96E+00 4.22E+00 1.64E+01 TM 09 30054 06/19/96 Zr-95 4.58E+00 2.90E+00 9.49E+00 TM 15 30055 06/19/96 Ag-110M 0.71E+00 1.47E+00 4.57E+00 TM 15 30055 06/19/96 Ba-140 1.81E+00 1.60E+00 4.99E+00 TM 15 30055 06/19/96 Be-7 7.33E+00 7.93E+00 2.51E+01 TM 15 30055 06/19/96 Ce-141 -0.44E+00 1.75E+00 1.03E+00 TM 15 30055 06/19/96 Ce-144 1.49E+01 6.27E+00 1.66E+01 TM 15 30055 06/19/96 Co-57 -0.70E+00 0.78E+00 2.31E+00 TM 15 30055 06/19/96 Co-58 -0.70E+00 0.97E+00 3.27E+00 TM 15 30055 06/19/96 Co-60 0.49E+00 1.12E+00 3.79E+00 TM 15 30055 06/19/96 Cr-51 -1.20E+01 9.15E+00 3.15E+01 TM 15 30055 06/19/96 Cs-134 -1.27E+00 0.94E+00 3.60E+00 TM 15 30055 06/19/96 Cs-137 2.05E+00 1.09E+00 3.51E+00 TM 15 30055 06/19/96 Fe-59 0.30E+00 3.29E+00 1.14E+01 TM 15 30055 06/19/96 I-131 0.17E+00 0.10E+00 0.24E+00 TM 15 30055 06/19/96 K-40 1.67E+03 5.65E+01 1.17E+01

TM 15 30055 06/19/96 Mn-54 -1.09E+00 0.91E+00 3.17E+00 TM 15 30055 06/19/96 Ru-103 -3.39E+00 1.05E+00 3.71E+00 TM 15 30055 06/19/96 Ru-106 1.09E+01 8.71E+00 2.93E+01 l TM 15 30055 06/19/96 Sb-124 1.55E+00 2.12E+00 6.99E+00 TM 15 30055 06/19/96 Se-75 -2.31E+00 1.29E400 4.44E+00 l TM 15 30055 06/19/96 Th-232 6.04E+00 3.68E+00 1.06E+01 i TM 15 30055 06/19/96 Zn-65 -4.75E+00 2.83E+00 1.04E&O1 TM 15 30055 06/19/96 Zr-95 -1.27E+00 1.82E+00 6.09E+00

!

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

,, , , .- a Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 16 30056 06/19/96 Ag-110M 0.67E+00 1.48E+00 4.63E+00 TM 16 30056 06/19/96 Ba-140 2.93E+00 1.50E+00 4.20E+00 TM 16 30056 06/1S/96 Be-7 -1.49E+01 8.98E+00 3.23E+01 TM 16 30056 06/19/96 Ce-141 1.93E+00 1.90E+00 5.27E+00 TM 16 30056 06/19/96 Ce-144 3.62E+00 7.22E+00 2.04E+01 TM 16 30056 06/19/96 Co-57 -0.94E+00 0.89E+00 2.65E+00 TM 16 30056 06/19/96 Co-58 0.23E+00 1.03E+00 3.30E+00 TM 16 30056 06/19/96 Co-60 9.62E-02 1.11E+00 3.91E+00 TM 16 30056 06/19/96 Cr-51 1.05E+01 1.09E+01 3.40E+01 TM 16 30056 06/19/96 Cs-134 2.19E+00 1.11E+00 3.57E+00 TM 16 30056 06/19/96 Cs-137 4.87E+00 1.81E+00 6.50E+00 TM 16 30056 06/19/96 Fe-59 -3.13E+00 2.87E+00 1.11E+01 TM 16 30056 06/19/96 I-131 9.99E-02 9.15E-02 0.25E+00 TM 16 30056 06/19/96 K-40 1.89E+03 6.22E+01 1.25E+01

TM 16 30056 06/19/96 Mn-54 -0.18E+00 1.01E+00 3.28E+00 TM 16 30056 06/19/96 Ru-103 -0.33E+00 1.07E+00 3.63E+00 TM 16 30056 06/19/96 Ru-106 7.09E+00 9.88E+00 3.43E+01 TM 16 30056 06/19/96 Sb-124 3.64E+00 2.41E+00 7.22E+00 TM 16 30056 06/19/96 Se-75 0.93E+00 1.38E+00 4.35E+00 TM 16 30056 06/19/96 Th-232 -2 66E+00 3.65E+00 3.04E+00 TM 16 30056 06/19/96 Zn-65 -4.39E+00 2.87E+00 1.05E+01 TM 16 30056 06/19/96 Zr-95 0.00E+00 1.81E+00 5.86E+00 TM 20 30057 06/19/96 Ag-110M -0.12E+00 1.50E+00 5.16E+00 TM 20 30057 06/19/96 Ba-140 1.34E+00 1.54E+00 5.23E+00 i TM 20 30057 06/19/96 Be-7 6.91E+00 8.43E+00 2.68E+01 TM 20 30057 06/19/96 Ce-141 -2.34E+00 1.93E+00 1.15E+00 TM 20 30057 06/19/96 Ce-144 6.58E+00 6.89E+00 1.92E+01 TM 20 30057 06/19/96 Co-57 1.47E+00 0.88E+00 2.37E+00 TM 20 30057 06/19/96 Co-58 -1.69E+00 0.91E+00 3.35E+00 TM 20 30057 06/19/96 Co-60 0.85E+00 1.03E+00 3.28E+00 TM 20 30057 06/19/96 Cr-51 -6.99E+00 1.04E+01 3.48E+01 TM 20 30057 06/19/96 Cs-134 0.11E+00 1.05E+00 3.75E+00 TM 20 30057 06/19/96 Cs-137 1.35E+00 1.24E+00 4.18E+00 TM 20 30057 06/19/96 Fe-59 -1.58E+00 3.33E+00 1.15E+01 TM 20 30057 06/19/96 I-131 -1.66E-02 3.56E-02 0.18E+00 TM 20 30057 06/19/96 K-40 1.29E+03 5.13E+01 1.22E+01

TM 20 30057 06/19/96 Mn-54 -0.48E+00 0.69E+00 2.48E+00 TM 20 30057 06/19/96 Ru-103 1.26E+00 1.15E+00 3.59E+00 TM 20 30057 06/19/96 Ru-106 -8.02E+00 9.92E+00 3.72E+01 TM 20 30057 06/19/96 Sb-124 0.90E+00 1.97E+00 7.14E+00 TM 20 30057 06/19/96 Se-75 1.06E+00 1.49E+00 4.66E+00 TM 20 30057 06/19/96 Th-232 -7.99E+00 4.55E+00 3.52E+00 TM 20 30057 06/19/96 Zn-65 -0.91E+00 2.42E+00 8.54E+00 TM 20 30057 06/19/96 Zr-95 -2.35E+00 1.84E+00 6.39E+00 TM 21 30058 06/19/96 Ag-110M -0.19E+00 1.22E+00 4.02E+00 TM 21 30058 06/19/96 Ba-140 0.19E+00 1.42E+00 4.99E+00 TM 21 30058 06/19/96 Be-7 -7.81E+00 8.16E+00 2.84E+01 TM 21 30058 06/19/96 Ce-141 0.83E+00 1.64E+00 4.66E+00 TM 21 30058 06/19/96 Ce-144 -0.15E+00 6.08E+00 1.75E+01

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data

(January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA.

LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pci/kg) l

....------------------------------------------------------------ l TM 21 30058 06/19/96 Co-57 -1.32E+00 0.77E+00 2.34E+00 TM 21 30058 06/19/96 Co-58 1.30E+00 0.96E+00 2.84E+00 TM 21 30058 06/19/96 Co-60 0.38E+00 0.98E+00 3.39E+00 TM 21 30058 06/19/96 Cr-51 4.24E+00 9.34E+00 2.98E+01 TM 21 30058 06/19/96 Cs-134 0.00E+00 0.96E+00 3.25E+00 TM 21 30058 06/19/96 Cs-137 3.21E+00 1.54E+00 5.74E+00 TM 21 30058 06/19/96 Fe-59 -2.19E+00 2.99E+00 1.10E+01 TM 21 30058 06/19/96 I-131 -3.21E-02 2.74E-02 0.17E+00 TM 21 30058 06/19/96 K-40 1.37E+03 5.25E+01 1.31E+01

TM 21 30058 06/19/96 Mn-54 -1.25E+00 0.94E+00 3.27E+00 TM 21 30058 06/19/96 Ru-103 0.20E+00 0.88E+00 2.94E+00 TM 21 30058 06/19/96 Ru-106 2.18E+00 9.11E+00 3.25E+01 TM 21 30058 06/19/96 Sb-124 -2.91E+00 1.91E+00 7.94E+00 TM 21 30058 06/19/96 Se-75 -0.56E+00 1.23E+00 4.06E+00 TM 21 30058 06/19/96 Th-232 -1.73E+00 3.55E+00 2.87E+00 TM 21 30058 06/19/96 Zn-65 -0.52E+00 2.39E+00 8.31E+00 TM 21 30058 06/19/96 Zr-95 0.30E+00 1.52E+00 4.92E+00 TM 04 30405 07/09/96 Ag-110M -1.08E+00 1.41E+00 5.17E+00 TM 04 30405 07/09/96 Ba-140 -1.77E+00 1.22E+00 5.54E+00 TM 04 30405 07/09/96 Be-7 -5.29E+00 8.28E+00 3.02E+01 TM 04 30405 07/09/96 Ce-141 -2.61E+00 1.75E+00 5.89E+00 ,

TM 04 30405 07/09/96 Ce-144 -4.56E+00 6.35E+00 2.0GE+01 TM 04 30405 07/09/96 Co-57 -1.01E+00 0.85E+00 2.80E+00

)

l TM 04 30405 07/09/96 Co-58 -0.13E+00 1.02E+00 3.58E+00 TM 04 30405 07/09/96 Co-60 -0.38E+00 1.13E+00 4.29E+00 TM 04 30405 07/09/96 Cr-51 3.77E+00 9.87E+00 3.31E+01 I TM 04 30405 07/09/96 Cs-134 0.13E+00 1.04E+00 3.53E+00 I TM 04 30405 07/09/96 Cs-137 6.78E+00 1.85E+00 6.58E+00

TM 04 30405 07/09/96 Fe-59 -7.01E-02 3.44E+00 1.25E+01 TM 04 30405 07/09/96 I-131 5.02E-02 7.07E-02 0.27E+00 TM 04 30405 07/09/96 K-40 1.40E+03 5.70E+01 6.11E+01

TM 04 30405 07/09/96 Mn-54 -0.28E+00 0.95E+00 3.39E+00 TM 04 30405 07/09/96 Ru-103 -1.83E+00 1.04E+00 4.01E+00 TM 04 30405 07/09/96 Ru-106 -2.48E+01 9.67E+00 4.04E+01 TM 04 30405 07/09/96 Sb-124 -0.5BE+00 2.11E+00 8.33E+00 TM 04 30405 07/09/96 Se-75 0.46E+00 1.47E+00 4.89E+00 TM 04 30405 07/09/96 Th-232 1.40E+00 3.66E+00 1.27E+01 TM 04 30405 07/09/96 Zn-65 -4.78E+00 2.61E+00 1.04E+01 TM 04 30405 07/09/96 Zr-95 -0.87E+00 1.88E+00 6.70E+00 TM 09 30406 07/09/96 Ag-110M -2,12E+00 2.22E+00 B.41E+00 TM 09 30406 07/09/96 Ba-140 -0.70E+00 2.57E+00 1.02E+01 TM 09 30406 07/09/96 Be-7 -1.28E+01 1.19E+01 4.55E+01 TM 09 30406 07/09/96 Ce-141 0.83E+00 2.40E+00 7.54E+00 TM 09 30406 07/09/96 Ce-144 5.64E+00 8.86E+00 2.73E+01 TM 09 30406 07/09/96 Co-57 0.98E+00 1.19E+00 3.63E+00 TM 09 30406 07/09/96 Co-58 1.9BE+00 1.51E+00 4.76E+00 TM 09 30406 07/09/96 Co-60 -0.30E+00 1.59E+00 6.24E+00 TM 09 30406 07/09/96 Cr-51 -1.40E+01 1.41E+01 5.11E+01

)

TM 09 30406 07/09/96 Cs-134 2.01E+00 1.37E+00 4.34E+00

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

i Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 09 30406 07/09/96 Cs-137 2.12E+00 1.72E+00 5.80E+00 TM 09 30406 07/09/96 Fe-59 6.12E+00 5.76E+00 1.93E+01 TM 09 30406 07/09/96 I-131 7.74E-03 4.44E-02 0.18E+00 TM 09 30406 07/09/96 K-40 1.51E+03 8.04E+01 7.74E+01

TM 09 30406 07/09/96 Mn-54 -0.49E+00 1.55E+00 5.61E+00 TM 09 30406 07/09/96 Ru-103 -1.38E+00 1.53E+00 5.75E+00 TM 09 30406 07/09/96 Ru-106 -9.38E+00 1.38E+01 5.37E+01 TM 09 30406 07/09/96 Sb-124 -4.41E+00 3.24E+00 1.51E+01 TM 09 30406 07/09/96 Se-75 0.29E+00 1.97E+00 6.66E+00 TM 09 30406 07/09/96 Th-232 -3.43E+00 5.22E+00 2.02E+01 TM 09 30406 07/09/96 Zn-65 8.95E+00 4.06E+00 1.21E+01 TM 09 30406 07/09/96 Zr-95 4.03E+00 2.93E+00 9.80E+00 TM 15 30407 07/09/96 Ag-110M -1.19E+00 1.54E+00 5.56E+00 TM 15 30407 07/09/96 Ba-140 -0.66E+00 1.38E+00 5.55E+00 TM 15 30407 07/09/96 Be-7 -6.43E+00 8.21E+00 3.02E+01 i TM 15 30407 07/09/96 Ce-141 0.20E+00 1.86E+00 5.65E+00 TM 15 30407 07/09/96 Ce-144 1.05E+00 6.62E+00 2.08E+01 .

TM 15 30407 07/09/96 Co-57 -0.79E+00 0.90E+00 2.93E+00 l TM 15 30407 07/09/96 Co-58 -1.17E+00 1.06E+00 3.94E+00 TM 15 30407 07/09/96 Co-60 5.37E-02 1.17E+00 4.29E+00 TM 15 30407 07/09/96 Cr-51 -1.15E+01 1.06E+01 3.78E+01 TM 15 30407 07/09/96 Cs-134 0.51E+00 1.09E+00 3.85E+00 TM 15 30407 07/09/96 Cs-137 0.31E+00 1.19E+00 4.28E+00 TM 15 30407 07/09/96 Fe-59 -7.01E-02 3.44E+00 1.25E+01 TM 15 30407 07/09/96 I-131 0.10E+00 8.03E-02 0.26E+00 TM 15 30407 07/09/96 K-40 1.62E+03 6.04E+01 5.21E+01

TM 15 30407 07/09/96 Mn-54 -0.43E+00 1.07E+00 3.77E+00 TM 15 30407 07/09/96 Ru-103 1.31E+00 0.88E+00 2.80E+00 TM 15 30407 07/09/96 Ru-106 2.09E+01 1.01E+01 3.20E+01 j TM 15 30407 07/09/96 Sb-124 -2.53E+00 1.54E+00 7.62E+00 1 TM 15 30407 07/09/96 Se-75 -0.69E+00 1.36E+00 4.71E+00 TM 15 30407 07/09/96 Th-232 -2.07E+00 3.86E+00 1.41E+01 l

TM 15 30407 07/09/96 Zn-65 0.29E+00 2.70E+00 9.56E+00 l TM 15 30407 07/09/96 Zr-95 3.32E+00 1.95E+00 5.91E+00 TM 16 30408 07/09/96 Ag-110M 1.44E+00 1.59E+00 5.09E+00 TM 16 30408 07/09/96 Ba-140 -2.48E+00 1.47E+00 6.41E+00 TM 16 30408 07/09/96 Be-7 -1.05E+00 8.36E+00 2.93E+01 TM 16 30408 07/09/96 Ce-141 -1.09E+00 2.01E+00 6.38E+00 i TM 16 30408 07/09/96 Ce-144 -0.63E+00 7.25E+00 2.27E+01 i TM 16 30408 07/09/96 Co-57 1.59E+00 0.97E+00 2.88E+00 l

TM 16 30408 07/09/96 Co-58 0.15E+00 1.17E+00 3.96E+00 TM 16 30408 07/09/96 Co-60 1.83E+00 1.25E+00 4.03E+00 1 TM 16 30408 07/09/96 Cr-51 -4.72E+00 1.09E+01 3.76E+01

! TM 16 30408 07/09/96 Cs-134 -0.12E+00 0.98E+00 3.32E+00 TM 16 30408 07/09/96 Cs-137 0.42E+00 1.39E+00 4.86E+00 TM 16 30408 07/09/96 Fe-59 -4.72E+00 3.83E+00 1.46E+01 TM 16 30408 07/09/96 I-131 6.80E-02 6.14E-02 0.18E+00 TM 16 30408 07/09/96 K-40 1.87E+03 6.20E+01 5.92E+01

1 TM 16 30408 07/09/96 Mn-54 -1.18E+00 0.93E+00 3.49E+00

[

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

I

t Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 16 30408 07/09/96 Ru-103 -3.03E+00 1.13E+00 4.44E+00 TM 16 30408 07/09/96 Ru-106 -1.30E+01 1.09E+01 4.13E+01 TM 16 30408 07/09/96 Sb-124 -2.10E+00 2.20E+00 8.99E+00 l TM 16 30408 07/09/96 Se-75 0.78E+00 1.57E+00 5.15E+00 1 TM 16 30408 07/09/96 Th-232 -1.07E+00 4.32E+00 1.50E+01 TM 16 30408 07/09/96 Zn-65 0.99E+00 2.82E+00 9.71E+00 TM 16 30408 07/09/96 Zr-95 -6.63E-02 1.99E+00 6.79E+00 l TM 20 30409 07/09/96 Ag-110M -1.59E+00 1.51E+00 5.66E+00 TM 20 30409 07/09/96 Ba-140 0.53E+00 1.83E+00 6.63E+00 TM 20 30409 07/09/96 Be-7 -7.67E+00 8.58E+00 3.11E+01 TM 20 30409 07/09/96 Ce-141 -5.52E+00 1.91E+00 6.61E+00 TM 20 30409 07/09/96 Ce-144 1.13E+01 7.08E+00 2.10E+01 TM 20 30409 07/09/96 Co-57 1.96E-02 0.87E+00 2.72E+00 TM 20 30409 07/09/96 Co-58 -0.15E+00 0.82E+00 2.93E+00 TM 20 30409 07/09/96 Co-60 1.34E+00 1.24E+00 4.03E+00 TM 20 30409 07/09/96 Cr-51 4.60E+00 1.05E+01 3.50E+01 TM 20 30409 07/09/96 Cs-134 -0.34E+00 1.09E+00 3.79E+00 TM 20 30409 07/09/96 Cs-137 2.02E+00 1.09E+00 3.50E+00 ,

TM 20 30409 07/09/96 Fe-59 1.80E+00 3.31E+00 1.12E+01 l TM 20 30409 07/09/96 I-131 -2.48E-02 4.64E-02 0.22E+00 TM 20 30409 07/09/96 K-40 1.40E+03 5.26E+01 5.02E+01

TM 20 30409 07/09/96 Mn-54 -1.86E+00 0.94E+00 3.64E+00 TM 20 30409 07/09/96 Ru-103 -0.24E+00 1.11E+00 3.87E+00 TM 20 30409 07/09/96 Ru-106 -9.17E+00 10.0E+00 3.77E+01 TM 20 30409 07/09/96 Sb-124 1.92E+00 2.11E+00 7.36E+00 TM 20 30409 07/09/96 Se-75 1.31E+00 1.44E+00 4.64E+00 TM 20 30409 07/09/96 Th-232 1.05E+01 4.14E+00 1.23E+01 TM 20 30409 07/09/96 Zn-65 -4.33E+00 2.42E+00 9.49E+00 TM 20 30409 07/09/96 Zr-95 -0.77E+00 1.90E+00 6.64E+00 TM 21 30410 07/09/96 Ag-110M -1.09E+00 1.24E+00 4.55E+00 TM 21 30410 07/09/96 Ba-140 -0.61E+00 1.56E+00 5.95E+00 TM 21 30410 07/09/96 Be-7 -7.41E+00 8.02E+00 2.91E+01 TM 21 30410 09/09/96 Ce-141 0.89E+00 1.73E+DO 5.38E+00 TM 21 30410 07/09/96 Ce-144 -8.51E+00 6.22E+DO 2.03E+01 TM 21 30410 07/09/96 Co-57 0.79E+00 0.84E+DO 2.54E+00 TM 21 30410 07/09/96 Co-58 1.59E+00 1.14E+00 3.54E+00 TM 21 30410 07/09/96 Co-60 6.71E-02 1.20E+DO 4.27E+00 TM 21 30410 07/09/96 Cr-51 -1.00E+01 1.00E+01 3.52E+01 TM 21 30410 07/09/96 Cs-134 -1.73E+00 0.79E+00 3.04E+00 TM 21 30410 07/09/96 Cs-137 1.01E+01 1.93E+00 6.00E+00

TM 21 30410 07/09/96 Fe-59 7.27E+00 3.60E+00 1.11E+01 TM 21 30410 07/09/96 I-131 -3.33E-02 2.54E-02 0.16E+00 TM 21 30410 07/09/96 K-40 1.39E+03 5.23E+01 6.06E+01

TM 21 30410 07/09/96 Mn-54 0.76E+00 0.95E+00 3.08E+00 l TM 21 30410 07/09/96 ha-103 0.53E+00 1.22E+00 4.08E+00 l TM 21 30410 07/09/96 Ru-106 -1.09E+00 8.23E+00 3.03E+01

( TM 21 30410 07/09/96 Sb-124 -0.13E+00 1.62E+00 6.42E+00 l TM 21 30410 07/09/96 Se-75 0.39E+00 1.32E+00 4.37E+00 TM 21 30410 07/09/96 Th-232 -7.15E+00 3.53E+00 1.38E+01

!

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 21 30410 07/09/96 Zn-65 -3.72E+00 2.46E+00 9.41E+00 TM 21 30410 07/09/96 Zr-95 0.49E+00 1.53E+00 5.19E+00 TM 04 30762 07/24/96 Ag-110M 0.10E+00 1.29E+00 4.45E+00 TM 04 30762 07/24/96 Ba-140 0.15E+00 1.24E+00 4.63E+00 TM 04 30762 07/24/96 Be-7 -2.03E+00 9.10E+00 3.16E+01 TM 04 30762 07/24/96 Ce-141 -0.90E+00 1.70E+00 5.43E+00 TM 04 30762 07/24/96 .Ce-144 -1.57E+00 7.01E+00 2.21E+01 TM 04 30762 07/24/96 Co-57 0.26E+00 0.88E+00 2.74E+00 TM 04 30762 07/24/96 Co-58 1.15E+00 1.09E+00 3.47E+00 TM 04 30762 07/24/96 Co-60 0.22E+00 1.04E+00 3.75E+00 TM 04 30762 07/24/96 Cr-51 1.39E+01 9.93E+00 3.15E+01 TM 04 30762 07/24/96 Cs-134 0.80E+00 0.89E+00 2.85E+00 TM 04 30762 07/24/96 Cs-137 3.48E+00 1.30E+00 3.98E+00 TM 04 30762 07/24/96 Fe-59 1.98E+00 3.26E+00 1.12E+01 TM 04 30762 07/24/96 I-131 1.30E-02 5.23E-02 0.27E+00 TM 04 30762 07/24/96 K-40 1.28E+03 5.25E+01 6.43E+01

TM 04 30762 07/24/96 Mn-54 3.54E-02 0.93E+00 3.22E+00 TM 04 30762 07/24/96 Ru-103 -0.40E+00 1.05E+00 3.72E+00 TM 04 30762 07/24/96 Ru-106 5.88E+00 9.77E+00 3.41E+01 TM 04 30762 07/24/96 Sb-124 -1.42E+00 2.29E+00 8.94E+00 TM 04 30762 07/24/96 Se-75 -0.24E+00 1.43E+00 4.82E+00 TM 04 30762 07/24/96 Th-232 3.86E+00 3.96E+00 1.29E+01 TM 04 30762 07/24/96 Zn-65 -4.62E+00 2.62E+00 1.02E+01 TM 04 30762 07/24/96 Zr-95 -2.82E+00 1.89E+00 7.00E+00 i

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

W Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 09 30763 07/24/96 Ag-110M -1.80E+00 1.46E*00 5.55E+00 TM 09 30763 07/24/96 Ba-140 1.16E+00 1.32E.J0 4.59E+00 TM 09 30763 07/24/96 Be-7 7.88E+00 7.82E+00 2.56E+01 TM 09 30763 07/24/96 Ce-141 -2.00E+00 1.82E+00 5.99E+00 TM 09 30763 07/24/96 Ce-144 4.11E+00 6.60E+00 2.02E+01 TM 09 30763 07/24/96 Co-57 -0.84E+00 0.83E+00 2.69E+00 TM 09 30763 07/24/96 Co-58 -2.12E+00 0.96E+00 3.76E+00 TM 09 30763 07/24/96 Co-60 1.52E+00 1.25E+00 4.02E+00 TM 09 30763 07/24/96 Cr-51 1.92E+00 9.45E+00 3.18E+01 I TM 09 30763 07/24/96 Cs-134 5.57E-02 0.98E+00 3.26E+00 '

TM 09 30763 07/24/96 Cs-137 2.56E+00 1.20E+00 3.80E+00 .

TM 09 30763 07/24/96 Fe-59 -0.67E+00 3.24E+00 1.15E+01 j TM 09 30763 07/24/96 I-131 9.30E-02 5.68E-02 0.21E+00 l TM 09 30763 07/24/96 K-40 1.34E+03 5.22E+01 5.86E+01

TM 09 30763 07/24/96 Mn-54 0.89E+00 0.98E+00 3.16E+00 TM 09 30763 07/24/96 Ru-103 -1.97E+00 1.11E+00 4.16E+00 TM 09 30763 07/24/96 Ru-106 -6.84E+00 9.94E+00 3.71E+01 TM 09 30763 07/24/96 Sb-124 1.86E+00 2.05E+00 7.12E+00 TM 09 30763 07/24/96 Se-75 0.46E+00 1.44E+00 4.75E+00 TM 09 30763 07/24/96 Th-232 -2.00E+00 3.93E+00 1.44E+01 TM 09 30763 07/24/96 Zn-65 -4.42E+00 2.84E+00 1.07E+01 TM 09 30763 07/24/96 Zr-95 -0.56E+00 1.74E+00 6.10E+00 TM 15 30764 07/24/96 Ag-110M -1.31E+00 1.87E+00 7.21E+00 TM 15 30764 07/24/96 Ba-140 -0.74E+00 2.07E+00 8.55E+00 TM 15 30764 07/24/96 Be-7 -1.32E+01 1.12E+01 4.35E+01 TM 15 30764 07/24/96 Ce-141 -3.35E+00 2.31E+00_ 7.76E+00 TM 15 30764 07/24/96 Ce-144 -9.84E+00 8.69E+00 2.86E+01 i TM 15 30764 07/24/96 Co-57 0.53E+00 1.08E+00 3.34E+00 I TM 15 30764 07/24/96 Co-58 --2.61E+00 1.53E+00 6.14E+00 TM 15 30764 07/24/96 Co-60 1.37E+00 1.77E+00 6.19E+00 TM 15 30764 07/24/96 Cr-51 -3.13E+01 1.41E+01 5.35E+01 TM 15 30764 07/24/96 Cs-134 -0.27E+00 1.25E+00 4.25E+00 i TM 15 30764 07/24/96 Cs-137 2.37E+00 1.70E+00 5.65E+00 l TM 15 30764 07/24/96 Fe-59 0.13E+00 5.42E+00 2.00E+01 TM 15 30764 07/24/96 I-131 0.15E+00 7.56E-02 0.28E+00 TM 15 30764 07/24/96 K-40 1.61E+03 8.40E+01 9.51E+01

TM 15 30764 07/24/96 Mn-54 -0.42E+00 1.59E+00 5.69E+00 TM 15 30764 07/24/96 Ru-103 -4.21E+00 1.55E+00 6.38E+00 TM 15 30764 07/24/96 Ru-106 2.00E+01 1.46E+01 4.86E+01 TM 15 30764 07/24/96 Sb-124 5.91E+00 2.76E+00 6.35E+00 TM 15 30764 07/24/96 Se-75 2.65E+00 2.03E+00 6.48E+00 TM 15 30764 07/24/96 Th-232 1.85E+00 6.22E+00 2.17E+01 TM 15 30764 07/24/96 Zn-65 1.48E+00 3.81E+00 1.36E+01 TM 15 30764 07/24/96 Zr-95 -1.99E+00 2.72E+00 1.09E+01 TM 16 30765 07/24/96 Ag-110M 0.33E+00 1.37E+00 e.62E+00 TM 16 30765 07/24/96 Ba-140 -1.34E+00 1.03E+00 4.53E+00 TM 16 30765 07/24/96 Be-7 9.01E+00 7.84E+00 2.54E+01 TM 16 30765 07/24/96 Ce-141 1.07E+00 1.70E+00 5.2GE+00

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station i

Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 16 30765 07/24/96 Ce-144 -4.95E+00 6.30E+00 2.02E+01 TM 16 30765 07/24/96 Co-57 0.39E+00 0.82E+00 2.53E+00 TM 16 30765 07/24/96 Co-58 -0.29E+00 1.01E+00 3.51E+00 TM 16 30765 07/24/96 Co-60 -0.56E+00 1.24E+00 4.54E+00 TM 16 30765 07/24/96 Cr-51 7.52E+00 9.46E+00 3.09E+01 TM 16 30765 07/24/96 Cs-134 0.21E+00 0.90E+00 2.99E+00 TM 16 30765 07/24/96 Cs-137 3.34E+00 1.03E+00 2.66E+00

TM 16 30765 07/24/96 Fe-59 1.96E+00 3.15E+00 1.08E+01 TM 16 30765 07/24/96 I-131 3.21E-02 4.65E-02 0.22E+00 TM 16 3076b 07/24/96 K-40 1.74E+03 5.76E+01 5.57E+01

TM 16 30765 07/24/96 Mn-54 -1.51E+00 0.86E+00 3.32E+00 TM 16 30765 07/24/96 Ru-103 -0.47E+00 0.91E+00 3.25E+00 TM 16 30765 07/24/96 Ru-106 4.34E+00 8.94E+00 3.15E+01 TM 16 30765 07/24/96 Sb-124 2.09E+00 1.80E+00 5.95E+00 TM 16 30765 07/24/96 Se-75 0.86E+00 1.30E+00 4.26E+00 TM 16 30765 07/24/96 Th-232 1.48E+00 4.01E+00 1.35E+01 TM 16 30765 07/24/96 Zn-65 -1.99E+00 2.64E+00 9.63E+00 TM 16 30765 07/24/96 Zr-95 1.25E+00 1.74E+00 5.69E+00 TM 20 30766 07/24/96 Ag-110M 3.47E+00 1.50E+00 4.32E+0C TM 20 30766 07/24/96 Ba-140 -0.31E+00 1.42E+00 5.35E+00 TM 20 30766 07/24/96 Be-7 1.42E+01 7.85E+00 2.43E+01 TM 20 30766 07/24/96 Ce-141 1.93E+00 1.76E+00 5.31E+00 TM 20 30766 07/24/96 Ce-144 -2.51E+00 6.77E+00 2.14E+01 TM 20 30766 07/24/96 Co-57 -0.83E+00 0.89E+00 2.86E+00 TM 20 30766 07/24/96 Co-58 -1.38E+00 1.08E+00 3.96E+00 TM 20 30766 07/24/96 Co-60 0.94E+00 1.04E+00 3.55E+00 TM 20 30766 07/24/96 Cr-51 -3.79E+00 9.30E+00 3.22E+01 TM 20 30766 07/24/96 Cs-134 3.31E-02 2.57E+00' 9.70E+00 TM 20 30766 07/24/96 Cs-137 2.23E+00 1.18E+00 3.80E+00 TM 20 30766 07/24/96 Fe-59 4.58E+00 3.57E+00 1.16E+01 TM 20 30766 07/24/96 I-131 -4.80E-02 4.63E-02 0.30E+00 TM 20 30766 07/24/96 K-40 1.36E+03 5.31E+01 5.55E+01

TM 20 30766 07/24/96 Mn-54 -0.57E+00 0.99E+00 3.51E+00 TM 20 30766 07/24/96 Ru-103 -0.49E+00 1.07E+00 3.79E+00 TM 20 30766 07/24/96 Ru-106 5.88E+00 9.4BE+00 3.32E+01 TM 20 30766 07/24/96 Sb-124 1.60E+00 1.75E+00 6.03E+00 TM 20 30766 07/24/96 Se-75 0.36E+00 1.43E+00 4.74E+00 TM 20 30766 07/24/96 Th-232 -1.20E+00 3.90E+00 1.38E+01 TM 20 30766 07/24/96 Zn-65 -3.42E+00 2.84E+00 1.06E+01 4 TM 20 30766 07/24/96 Zr-95 -0.26E+00 1.94E+00 6.65E+00 1 TM 21 30767 07/24/96 Ag-110M 2.34E+00 1.56E+00 5.01E+00 TM 21 30767 07/24/96 Ba-140 -0.93E+00 1.47E+00 5.81E+00 TM 21 30767 07/24/96 Be-7 -2.35E+01 8.21E+00 3.25E+01 TM 21 30767 07/24/96 Ce-141 -3.96E+00 1.86E+00 6.28E+00 TM 21 30767 07/24/96 Ce-144 -2.74E+00 6.31E+00 2.01E+01 l TM 21 30767 07/24/96 Co-57 0.94E+00 0.87E+00 2.61E+00 TM 21 30767 07/24/96 Co-58 -0.72E+00 0.99E+00 3.57E+00 TM 21 30767 07/24/96 Co-60 -1.41E+00 1.04E+00 4.09E+00 ,

TM 21 307o7 J7/24/96 Cr-51 -2.96E+00 9.81E+00 3.36E+01 I

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 21 30767 07/24/96 Cs-134 0.81E+00 0.98E+00 3.13E+00 TM 21 30767 07/24/96 Cs-137 3.91E+00 1.89E+00 6.57E+00 TM 21 30767 07/24/96 Fe-59 -1.91E+00 2.99E+00 1.10E+01 TM 21 30767 07/24/96 I-131 1.04E-02 4.27E-02 0.23E+00 TM 21 30767 07/24/96 K-40 1.28E+03 5.13E+01 6.08E+01

TM 21 30767 07/24/96 Mn-54 1.51E+00 1.05E+00 3.24E+00 TM 21 30767 07/24/96 Ru-103 -3.02E+00 1.01E+00 4.07E+00 TM 21 30767 07/24/96 Ru-106 9.13E+00 8.84E+00 3.02E+01 TM 21 30767 07/24/96 Sb-124 1.42E+00 2.10E+00 7.48E+00 TM 21 30767 07/24/0a Se-75 -0.20E+00 1.33E+00 4.50E+00 TM 21 30767 07/24/>6 Th-232 -0.84E+00 4.12E+00 1.47E+01 TM 21 30767 07/24/96 Zn-65 0.37E+00 2.46E+00 8.63E+00 TM 21 30767 07/24/96 Zr-95 -0.12E+00 1.75E+00 6.04E+00 TM 04 30968 08/07/96 Ag-110M -1.34E+00 1.84E+00 7.45E+00 TM 04 30968 08/07/96 Ba-140 -2.06E+00 3.07E+00 1.30E+01 TM 04 30968 08/07/96 Be-7 1.92E+00 1.55E+01 5.43E+01 TM 04 30968 08/07/96 Ce-141 -3.11E+00 2.58E+00 8.74E+00 TM 04 30968 08/07/96 Ce-144 -1.02E+01 9.62E+00 3.19E+01 TM 04 30968 08/07/96 Co-57 -1.65E+00 1.23E+00 4.11E+00 ,

TM 04 30968 08/07/96 Co-58 1.73E+00 1.83E+00 6.01E+00 '

TM 04 30968 08/07/96 Co-60 1.92E+00 1.99E+00 6.84E+00 TM 04 30968 08/07/96 Cr-51 -6.43E+00 1.44E+01 5.21E+01 TM 04 30968 08/07/96 Cs-134 1.39E+00 1.34E+00 4.48E+00 l TM 04 30968 08/07/96 Cs-137 6.36E+00 3.18E+00 1.10E+01 1 TM n4 30968 08/07/96 Fe-59 4.51E+00 6.21E+00 2.17E+01 TM 04 30968 08/07/96 I-131 5.33E-02 7.36E-02 0.36E+00 TM 04 30968 08/07/96 K-40 1.40E+03 8.51E+01 8.52E+01

TM 04 30968 08/07/96 Mn-54 -1.51E+00 1.47E+00 5.87E+00 TM 04 30968 08/07/96 Ru-103 -1.76E+00 1.85E+00 7.03E+00 TM 04 30968 08/07/96 Ru-106 -5.36E+00 1.61E+01 6.16E+01 TM 04 30968 08/07/96 Sb-124 -4.33E+00 3.82E+00 1.77E+01 TM 04 30968 08/07/96 Se-75 1.35E+00 2.16E+00 7.16E+00 TM 04 30968 08/07/96 Th-232 5.39E+00 6.62E+00 2.24E+01 TM 04 30968 08/07/96 Zn-65 1.26E+00 4.94E+00 1.76E+01 TM 04 30968 08/07/96 Zr-95 -3.70E+00 2.89E+00 1.24E+01 TM 09 30969 08/07/96 Ag-110M -1.20E+00 1.36E+00 5.05E+00 TM 09 30969 08/07/96 Ba-140 -2.12E+00 1.58E+00 6.79E+00 TM 09 30969 08/07/96 Be-7 5.62E+00 8.14E+00 2.74E+01 TM 09 30969 08/07/96 Ce-141 -0.88E+00 1.78E+00 5.78E+00 TM 09 30969 08/07/96 Ce-144 -0.18E+00 6.99E+00 2.20E+01 TM 09 30969 08/07/96 Co-57 -0.59E+00 0.87E+00 2.82E+00 TM 09 30969 08/07/96 Co-58 0.72E+00 1.03E+00 3.42E+00 TM 09 30969 08/07/96 Co-60 0.94E+00 1.28E+00 4.39E+00 TM 09 30969 08/07/96 Cr-51 1.64E+01 1.12E+01 3.56E+01 TM 09 30969 08/07/96 Cs-134 -1.91E+00 1.01E+00 4.14E+00 TM 09 30969 08/07/96 Cs-137 1.70E+00 1.22E+00 4.07E+00 TM 09 30969 08/07/96 Fe-59 -1.01E+00 3.69E+00 1.36E+01 TM 09 30969 08/07/96 I-131 5.77E-02 6.20E-02 0.29E+00 TM 09 30969 08/07/96 K-40 1.41E+03 5.73E+01 6.28E+01 *

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l

i Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pci/kg) (pCi/kg)

TM 09 30969 08/07/96 Mn-54 0.20E+00 0.99E+00 3.40E+00 TM 09 30969 08/07/96 Ru-103 -0.81E+00 1.08E+00 3.97E+00 TM 09 30969 08/07/96 Ru-106 -3.93E+00 9.88E+00 3.69E+01 TM 09 30969 08/07/96 Sb-124 -0.59E+00 2.15E+00 8.51E+00 TM 09 30969 08/07/96 Se-75 0.21E+00 1.43E+00 4.79E+00 TM 09 30969 08/07/96 Th-232 1.33E+00 3.83E+00 1.32E+01 TM 09 30969 08/07/96 Zn-65 -4.85E+00 2.57E+00 1.03E+01 TM 09 30969 08/07/96 Zr-95 1.18E+00 2.00E+00 6.60E+00 TM 15 30970 08/07/96 Ag-110M -1.59E+00 2.08E+00 7.78E+00 TM 15 30970 08/07/96 Ba-140 -1.87E+00 2.75E+00 1.12E+01 TM 15 30970 08/07/96 Be-7 1.18E+00 1.17E+01 4.11E+01 TM 15 30970 08/07/96 Ce-141 -1.11E+00 2.35E+00 7.54E+00 TM 15 30970 08/07/96 Ce-144 -1.74E+00 7.87E+00 2.51E+01 TM 15 30970 08/07/96 Co-57 1.09E+00 1.11E+00 3.36E+00 TM 15 30970 08/07/96 Co-58 1.69E+00 1.47E+00 4.72E+00 TM 15 30970 08/07/96 Co-60 1.11E+00 1.69E+00 6.14E+00 TM 15 30970 08/07/96 Cr-51 0.78E+00 1.47E+01 5.01E+01 TM 15 30970 08/07/96 Cs-134 1.00E+00 1.42E+00 4.99E+00 TM 15 30970 08/07/96 Cs-137 2.43E+00 1.72E+00 5.72E+00 TM 15 30970 08/07/96 Fe-59 7.15E+00 5.68E+00 1.86E+01 TM 15 30970 08/07/96 I-131 3.82E-02 5.16E-02 0.24E+00 TM 15 30970 08/07/96 K-40 1.85E+03 8.65E+01 9.40E+01

TM 15 30970 08/07/96 Mn-54 6.42E-02 1.35E+00 4.80E+00 TM 15 30970 08/07/96 Ru-103 -3.72E+00 1.48E+00 6.07E+00 TM 15 30970 08/07/96 Ru-106 1.85E+01 1.35E+01 4.49E+01 TM 15 30970 08/07/96 Sb-124 0.00E+00 2.48E+00 1.07E+01 TM 15 30970 08/07/96 Se-75 -2.68E+00 1.66E+00 6.12E+00 TM 15 30970 08/07/96 Th-232 0.97E+00 5.92E+00~ 2.08E+01 TM 15 30970 08/07/96 Zn-65 -2.50E+00 3.93E+00 1.49E+01 TM 15 30970 08/07/96 Zr-95 -0.35E+00 3.08E+00 1.08E+01 TM 16 30971 08/07/96 Ag-110M 2.31E+00 1.44E+00 4.42E+00 TM 16 30971 08/07/96 Ba-140 -1.25E+00 1.44E+00 5.92E+00 TM 16 30971 08/07/96 Be-7 0.00E+00 7.82E+00 2.74E+01 TM 16 30971 08/07/96 Ce-141 -4.41E+00 1.87E+00 6.30E+00 TM 16 30971 08/07/96 Ce-144 -0.95E+00 6.83E+00 2.15E+01 TM 16 30971 08/07/96 Co-57 0.90E+00 0.92E+00 2.79E+00 TM 16 30971 08/07/96 Co-58 -2.03E+00 1.07E+00 4.08E+00 TM 16 30971 08/07/96 Co-60 1.66E+00 1.26E+00 4.11E+00 TM 16 30971 08/07/96 Cr-51 1.19E+01 1.09E+01 3.51E+01 TM 16 30971 08/07/96 Cs-134 1.27E+00 0.99E+00 3.10E+00 TM 16 30971 08/07/96 Cs-137 5.57E+00 1.95E+00 6.50E+00 TM 16 30971 08/07/96 Fe-59 0.32E+00 3.60E+00 1.28E+01 TM 16 30971 08/07/96 I-131 -1.27E-02 2.82E-02 0.19E+00 TM 16 30971 08/07/96 K-40 1.81E+03 6.11E+01 5.87E+01

TM 16 30971 08/07/96 Mn-54 -0.64E+00 1.01E+00 3.61E+00 TM 16 30971 08/07/96 Ru ~03 0.42E+00 1.18E+00 3.99E+00 TM 16 30971 08/07/96 Ru-106 1.54E+01 1.07E+01 3.53E+01 TM 16 30971 08/07/96 Sb-124 1.47E+00 2.52E+00 8.75E+00 TM 16 30971 08/07/96 Se-75 -1.11E+00 1.44E+00 4.97E+00

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 16 30971 08/07/96 Th-232 -5.06E+00 3.97E+00 1.47E+01 TM 16 30971 08/07/96 Zn-65 -1.81E+00 2.89E+00 1.05E+01 TM 16 30971 08/07/96 Zr-95 0.80E+00 2.07E+00 6.87E+00 TM 20 30972 08/07/96 Ag-110M -0.77E+00 1.41E+00 5.19E+00 TM 20 30972 08/07/96 Ba-140 2.18E+00 1.54E+00 5.01E+00

, TM 20 30972 08/07/96 Be-7 -0.68E+00 8.35E+00 2.91E+01 TM 20 30972 08/07/96 Ce-141 0.13E+00 1.95E+00 6.08E+00 TM 20 30972 08/07/96 Ce-144 2.30E+00 6.59E+00 2.04E+01 TM 20 30972 08/07/96 Co-57 1.34E+00 0.85E+00 2.52E+00 TM 20 30972 08/07/96 Co-58 0.67E+00 1.09E+00 3.59E+00 TM 20 30972 08/07/96 Co-60 -1.45E+00 1.13E+00 4.35E+00 TM 20 30972 08/07/96 Cr-51 -8.59E+00 1.04E+01 3.65E+01 TM 20 30972 08/07/96 Cs-134 -0.34E+00 0.89E+00 3.29E+00 TM 20 30972 08/07/96 Cs-137 1.21E+00 1.09E+00 3.69E+00 TM 20 30972 08/07/96 Fe-59 2.30E+00 3.35E+00 1.12E+01 TM 20 30972 08/07/96 I-131 -3.22E-02 3.70E-02 0.22E+00 TM 20 30972 08/07/96 K-40 1.31E+03 5.15E+01 5.58E+01

TM 20 30972 08/07/96 Mn-54 0.76E+00 0.98E+00 3.18E+00 TM 20 30972 08/07/96 Ru-103 0.15E+00 1.06E+00 3.65E+00 TM 20 30972 08/07/96 Ru-106 1.72E+01 9.39E+00 3.03E+01 TM 20 30972 08/07/96 Sb-124 0.46E+00 2.04E+00 7.73E+00 TM 20 30972 08/07/96 Se-75 1.16E+00 1.33E+00 4.33E+00 TM 20 30972 08/07/96 Th-232 2.06E+00 3.69E+00 1.27E+01 l TM 20 30972 08/07/96 Zn-65 0.99E+00 2.57E+00 8.86E+00 !

TM 20 30972 08/07/96 Zr-95 1.29E+00 1.76E+00 5.77E+00 ,

l TM 21 30973 08/07/96 Ag-110M 3.04E+00 2.45E+00 7.74E+00 TM 21 30973 08/07/96 Ba-140 -2.81E+00 2.48E+00 1.11E+01 TM 21 30973 08/07/96 Be-7 -1.12E+01 1.24E+01 4.67E+01 TM 21 30973 08/07/96 Ce-141 2.72E+00 2.41E+00 7.28E+00 TM 21 30973 08/07/96 Ce-144 -3.31E+00 8.86E+00 2.84E+01 TM 21 30973 08/07/96 Co-57 2.45E+00 1.19E+00 3.45E+00 TM 21 30973 08/07/96 Co-58 -0.45E+00 1.84E+00 6.52E+00 TM 21 30973 08/07/96 Co-60 0.10E+00 1.73E+00 6.53E+00 TM 21 30973 08/07/96 Cr-51 1.55E+01 1.47E+01 4.76E+01 TM 21 30973 08/07/96 Cs-134 1.14E+00 1.14E+00 3.54E+00 TM 21 30973 08/07/96 Cs-137 5.30E+00 2.05E+00 6.23E+00 TM 21 30973 08/07/96 Fe-59 0.54E+00 4.83E+00 1.81E+01 TM 21 30973 08/07/96 I-131 3.83E-02 3.82E-02 0.17E+00 TM 21 30973 08/07/96 K-40 1.34E+03 7.59E+01 7.74E+01

TM 21 30973 08/07/96 Mn-54 0.28E+00 1.46E+00 5.12E+00 l TM 21 30973 08/07/96 Ru-103 0.94E+00 1.70E+00 5.78E+00 I TM 21 30973 08/07/96 Ru-106 -2.23E+00 1.56E+01 5.80E+01 TM 21 30973 08/07/96 Sb-124 -2.93E+00 3.09E+00 1.42E+01 TM 21 30973 08/07/96 Se-75 -2.38E+00 2.05E+00 7.30E+00 TM 21 30973 08/07/96 Th-232 -2.38E+00 5.85E+00 2.17E+01 l TM 21 30973 08/07/96 Zn-65 0.61E+00 4.36E+00 1.56E+01 1 TM 21 30973 08/07/96 Zr-95 4.11E+00 3.17E+00 1.07E+01 l I

Radioactivity detected (i.e., Concentra$ ion > 3 Std. Deviations).

1 i

i I Seabrook Nuclear Power Station i Radiological Environmental Monitoring Data (January - December 1996)

, SAMPLE CONC. STD DEV. MDC i TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 04 31216 08/21/96 Ag-110M 2.32E+00 2.51E+00 8.58E+00 TM 04 31216 08/21/96 Ba-140 3.74E+00 2.46E+00 7.69E+00 TM 04 31216 08/21/96 Be-7 2.65E+01 1.39E+01 4.20E+01 TM 04 31216 08/21/96 Ce-141 5.22E+00 3.19E+00 9.43E+00 TM 04 31216 08/21/96 Ce-144 2.86E+00 1.21E+01 3.83E+01 TM 04 31216 08/21/96 Co-57 0.94E+00 1.48E+00 4.64E+00 TM 04 31216 08/21/96 Co-58 3.04E+00 1.61E+00 4.68E+00 TM 04 31216 08/21/96 Co-60 3.57E+00 1.97E+00 5.86E+00 TM 04 31216 08/21/96 Cr-51 -1.74E+01 1.88E+01 6.92E+01 TM 04 31216 08/21/96 Cs-134 -0.89E+00 1.29E+00 5.41E+00 TM 04 31216 08/21/96 Cs-137 6.84E+00 3.24E+00 1.11E+01 TM 04 31216 08/21/96 Fe-59 -6.31E+00 5.61E+00 2.31E+01 TM 04 31216 08/21/96 I-131 0.15E+00 6.83E-02 0.25E+00 TM 04 31216 08/21/96 K-40 1.36E+03 8.66E+01 1.07E+02

TM 04 31216 08/21/96 Mn-54 0.46E+00 1.33E+00 4.84E+00 TM 04 31216 08/21/96 Ru-103 -2.84E+00 2.00E+00 7.90E+00 TM 04 31216 08/21/96 Ru-106 3.06E+01 1.43E+01 4.31E+01 TM 04 31216 08/21/96 Sb-124 1.87E+00 3.83E+00 1.48E+01 TM 04 31216 08/21/96 Se-75 9.90E-02 2.27E+00 7.91E+00 TM 04 31216 08/21/96 Th-232 1.39E+01 7.39E+00 2.28E+01 TM 04 31216 08/21/96 Zn-65 -2.77E+00 4.11E+00 1.64E+01 TM 04 31216 08/21/96 Zr-95 -5.77E+00 3.06E+00 1.30E+01 TM 09 31217 08/21/96 Ag-110M -4.39E+00 3.97E+00 1.64E+01 TM 09 31217 08/21/96 Ba-140 5.87E+00 3.95E+00 1.18E+01 TM 09 31217 08/21/96 Be-7 1.57E+00 1.67E+01 6.45E+01 TM 09 31217 08/21/96 Ce-141 8.24E+00 4.25E+00 1.24E+01 TM 09 31217 08/21/96 Ce-144 1.17E+00 1.36E+01_ 4.45E+01 TM 09 31217 08/21/96 Co-57 -1.93E+00 1.51E+00 5.43E+00 TM 09 31217 08/21/96 Co-58 -2.39E+00 2.26E+00 9.98E+00 TM 09 31217 08/21/96 Co-60 3.61E+00 3.43E+00 1.18E+01 TM 09 31217 08/21/96 Cr-51 9.57E+00 2.35E+01 8.23E+01 TM 09 31217 08/21/96 Cs-134 2.60E+00 2.51E+00 8.38E+00 TM 09 31217 08/21/96 Cs-137 3.95E+00 2.80E+00 9.29E+00 TM 09 31217 08/21/96 Fe-59 -6.25E+00 6.35E+00 3.11E+01 TM 09 31217 08/21/96 I-131 3.06E-02 5.01E-02 0.24E+00 TM 09 31217 08/21/96 K-40 1.24E+03 1.15E+02 1.23E+02

TM 09 31217 08/21/96 Mn-54 -1.21E+00 1.78EF00 7.97E+00 TM 09 31217 08/21/96 Ru-103 -3.09E+00 2.73E+00 1.12E+01 TM 09 31217 08/21/96 Ru-106 3.88E+01 2.29E+01 7.27E+01 TM 09 31217 08/21/96 Sb-124 4.99E+00 7.63E+00 2.82E+01 TM 09 31217 08/21/96 Se-75 -4.93E+00 2.30E+00 9.97E+00 TM 09 31217 08/21/96 Th-232 3.94E+00 9.61E+00 3.55E+01 TM 09 31217 08/21/96 Zn-65 -4.57E+00 6.84E+00 2.82E+01 TM 09 31217 08/21/96 Zr-95 -2.53E+00 4.73E+00 2.01E+01 TM 15 31218 08/21/96 Ag-110M 5.17E+00 2.37E+00 6.64E+00 TM 15 31218 08/21/96 Ba-140 3.78E+00 2.32E+00 6.85E+00 TM 15 31218 08/21/96 Be-7 0.85E+00 1.19E+01 4.38E+01 TM 15 31218 08/21/96 Ce-141 -1.69E+00 2.66E+00 8.96E+00 TM 15 31218 08/21/96 Ce-144 4.28E+00 1.12E+01 3.55E+01 i

Radioactivity detected (i . e. , Concentration > 3 Std. Deviations).

. - _ - - . - - - - - - - -.. v. -- -

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/k (pCi/kg)

_______________________________________________________________g) _______________

TM 15 31218 08/21/96 Co-57 10.0E-02 1.31E+00 4.24E+00 TM 15 31218 08/21/96 Co-58 2.14E+00 1.88E+00 6.05E+00 TM 1F 31218 08/21/96 Co-60 1.31E+00 1.81E+00 6.47E+00 TM 15 31218 08/21/96 Cr-51 1.52E+01 1.61E+01 5.33E+01 TM 15 31218 08/21/96 Cs-134 0.78E+00 1.48E+0D 5.06E+00 TM 15 31218 08/21/96 Cs-137 1.02E+00 1.96E+00 7.08E+00 TM 15 31218 08/21/96 Fe-59 -4.57E+00 4.79E+00 2.04E+01 TM 15 33218 08/21/96 I-131 2.94E-02 7.62E-02 0.40E+00 TM 15 31218 08/21/96 K-40 1.65E+03 9.14E+01 9.40E+01

TM 15 31218 08/21/96 Mn-54 0.17E+00 1.52E+00 5.51E+00 TM 15 31218 08/21/96 Ru-103 2.19E+00 1.56E+00 5.00E+00 TM 15 31218 08/21/96 Ru-106 -4.05E+01 1.59E+01 7.10E+01 TM 15 31218 08/21/96 Sb-124 -1.29E+00 2.70E+00 1.28E+01 TM 15 31218 08/21/96 Se-75 -0.70E+00 2.27E+00 8.01E+00 TM 15 31218 08/21/96 Th-232 -0.98E+00 6.19E+00 2.31E+01 TM 15 31218 08/21/96 Zn-65 -5.31E+00 3.47E+00 1.52E+01 i TM 15 31218 08/21/96 Zr-95 1.45E+00 2.84E+00 9.86E+00 )

l TM 16 31219 08/22/96 Ag-110M 1.45E+00 2.73E+00 9.87E+00 TM 16 31219 08/22/96 Ba-140 -1.33E+00 1.19E+00 9.10E+00 TM 16 31219 08/22/96 Be-7 -2.14E+01 1.42E+01 6.46E+01 TM 16 31219 08/22/96 Ce-141 -3.21E+00 3.43E+00 1.21E+01 TM 16 31219 08/22/96 Ce-144 -1.65E+01 1.38E+01 4.90E+01 TM 16 31219 08/22/96 Co-57 2.55E+00 1.65E+00 4.92E+00 TM 16 31219 08/22/96 Co-58 0.15E+00 2.11E+00 8.00E+00 TM 16 31219 08/22/96 Co-60 -0.19E+00 2.41E+00 9.86E+00 TM 16 31219 08/22/96 Cr-51 5.02E+00 2.13E+01 7.54E+01 TM 16 31219 08/22/96 Cs-134 0.00E+00 2.18E+00 8.44E+00 TM 16 31219 08/22/96 Cs-137 6.19E+00 3.38E+00 1.05E+01 TM 16 31219 08/22/96 Fe-59 -6.09E+00 7.56E+00 3.20E+01 TM 16 31219 08/22/96 I-131 7.70E-02 9.29E-02 0.45E+00 TM 16 31219 08/22/96 K-40 1.91E+03 1.25E+02 1.12E+02

TM 16 31219 08/22/96 Mn-54 1.72E+00 2.11E+00 7.22E+00 TM 16 31219 08/22/96 Ru-103 -2.14E+00 2.33E+00 9.43E+00 TM 16 31219 08/22/96 Ru-106 4.77E+00 2.38E+01 8.97E+01 TM 16 31219 08/22/96 Sb-124 -2.08E+00 1.86E+00 1.43E+01 TM 16 31219 08/22/96 Se-75 -0.84E+00 3.09E+00 1.11E+01 TM 16 31219 08/22/96 Th-232 7.54E+00 9.30E+00 3.16E+01 TM 16 31219 08/22/96 Zn-65 -2.26E+00 5.63E+00 2.25E+01 TM 16 31219 08/22/96 Zr-95 2.36E+00 4.62E+00 1.61E+01 TM 20 31220 08/21/96 Ag-110M 0.81E+00 3.04E+00 1.15E+01 ;

TM 20 31220 08/21/96 Ba-140 -1.09E+00 2.20E+00 1.17E+01 i TM 20 31220 08/21/96 Be-7 -8.93E+00 1.58E+01 6.42E+01 !

TM 20 31220 08/21/96 Ce-141 0.00E+00 3.60E+00 1.20E+01 l TM 20 31220 08/21/96 Ce-144 -8.12E+00 1.25E+01 4.36E+01 l TM 20 31220 08/21/96 Co-57 -2.96E+00 1.70E+00 6.22E+00 l TM 20 31220 08/21/96 Co-58 0.00E+00 2.13E+00 7.53E+00 TM 20 31220 08/21/96 Co-60 -2.43E+00 2.37E+00 1.05E+01 TM 20 31220 08/21/96 Cr-51 -6.96E+00 1.98E+01 7.45E+01 TM 20 31220 08/21/96 Cs-134 -2.74E+00 2.04E+00 8.89E+00

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

. - - _ . . _ - - - ~ . - . - . _ - - . . . . _ . - ~ > ..n i

3 Seabrook Nuclear Power Station l

Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV.

MDC i

TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg) J TM 20 31220 08/21/96 Cs-137 0.46E+00 1.4BE+00 6.05E+00 ;

, TM 20 31220 08/21/96 Fe-59 6.83E+00 7.38E+00 2.52E+01 i TM 20 31220 08/21/96 I-131 6.79E-02 6.32E-02 0.27E+00 ;

} TM 20 31220 08/21/96 K-40 1.25E+03 1.01E+02 1.14E+02 * !

TM 20 31220 08/21/96 Mn-54 1.12E+00 1.99E+00 7.07E+00 TM 20 31220 08/21/96 Ru-103 0.13E+00 2.33E+00 8.66E+00 ;

TM 20 31220 08/21/96 Ru-106 -1.40E+01 2.04E+01 8.48E+01 !

TM 20 31220 08/21/96 Sb-124 -4.09E+00 3.93E+00 2.12E+01 "

20 TM 31220 08/21/96 Se-75 -0.98E+00 2.95E+00 1.07E+01 TM 20 31220 08/21/96 Th-232 1.11E+01 6.19E+00 1.83E+01

TM 20 31220 08/21/96 Zn-65 -7.13E+00 5.72E+00 2.44E+01 I TM 20 31220 08/21/96 Zr-95 -4.41E+00 4.08E+00 1.6BE+01 I TM 21 31221 08/21/96 Ag-110M 6.07E+00 3.17E+00 9.11E+00 TM 21 31221 08/21/96 Ba-140 -2.06E+00 2.52E+00 1.35E+01 TM 21 31221 08/21/96 Be-7 2.34E+01 1.56E+01 4.91E+01 TM 21 31221 08/21/96 Ce-141 5.85E+00 3.52E+00 1.04E+01 TM 21 31221 08/21/96 Ce-144 0.00E+00 1.10E+01 3.60E+01 TM 21 31221 08/21/96 Co-57 1.37E+00 1.79E+00 5.54E+00 ;

TM 21 31221 08/21/96 Co-58 -4.00E+00 1.73E+00 8.66E+00 TM 21 31221 08/21/96 Co-60 1.80E+00 2.44E+00- 8.92E+00 TM 21 31221 08/21/96 Cr-51 3.68E+01 2.09E+01 6.47E+01 21 j TM 31221 08/21/96 Cs-134 0.81E+00 1.68E+00 5.71E+00 TM 21 31221 08/21/96 Cs-137 4.55E+00 2.56E+00 8.14E+00 TM 21 31221 08/21/96 Fe-59 -0.26E+00 5.83E+00 2.44E+01 TM 21 31221 08/21/96 I-131 -7.09E-02 2.83E-02 0.26E+00 ,

TM 21 31221 08/21/96 K-40 1.48E+03 1.13E+02 1.26E+02

TM 21 31221 08/21/96 Mn-54 0.28E+00 2.42E+00 8.79E+00 TM 21 31221 08/21/96 Ru-103 -4.57E+00 2.29E+00 9.85E+00 l TM 21 31221 08/21/96 Ru-106 5.09E+00 2.31E+01 8.64E+01 '

TM 21 31221 08/21/96 Sb-124 -0.45E+00 5.26E+00 2.26E+01 TM 21 31221 08/21/96 Se-75 1.41E+00 2.61E+00 8.91E+00 TM 21 31221 08/21/96 Th-232 -1.14E+01 7.17E+00 3.27E+01 TM 21 31221 08/21/96 Zn-65 -2.10E+00 5.32E+00 2.16E+01 TM 21 31221 08/21/96 Zr-95 5.08E+00 4.19E+00 1.43E+01 TM 04 31389 09/04/96 Ag-110M 2.15E+00 2.33E+00 7.95E+00 TM 04 31389 09/04/96 Ba-140 2.19E+00 3.11E+00 1.16E+01 TM 04 31389 09/04/96 Be-7 1.14E+01 1.70E+01 5.87E+01 TM 04 31389 09/04/96 Ce-141 1.86E+00 3.36E+00 1.05E+01 TM 04 31389 09/04/96 Ce-144 -2.33E+01 1.07E+01 3.86E+01 TM 04 31389 09/04/96 Co-57 -0.79E+00 1.40E+00 4.68E+00 TM 04 31389 09/04/96 Co-58 -2.00E+00 1.95E+00 8.16E+00 TM 04 31389 09/04/96 Co-60 1.05E+00 2.78E+00 1.06E+01 TM 04 31389 09/04/96 Cr-51 1.97E+00 1.94E+01 6.85E+01 7M 04 31389 09/04/96 Cs-134 0.00E+00 2.50E+00 8.81E+00 TM 04 31389 09/04/96 Cs-137 5.06E+00 2.52E+00 7.81E+00 TM 04 31389 09/04/96 Fe-59 3.56E+00 6.94E+00 2.56E+01 TM 04 31389 09/04/96 I-131 0.15E+00 0.12E+00 0.50E+00 TM 04 31389 09/04/96 K-40 1.47E+03 1.09E+02 1.37E+02

TM 04 31389 09/04/96 Mn-54 -0.63E+00 2.17E+00 8.19Ev00

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

-. -- . . - - - . . - , . - . ,~-a,. , , , , , , ,. c . . - - . . . --

Seabrook Nuclear Power Station l

Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 04 31389 09/04/96 Ru-103 -0.22E+00 1.96E+00 7.38E+00 l TM 04 31389 09/04/96 Ru-106 -2.02E+01 1.67E+01 7.32E+01 31389 09/04/96 TM 04 Sb-124 -2.81E+00 4.52E+00 2.18E+01 TM 04 31389 09/04/96 Se-75 -6.04E+00 2.53E+00 1.01E+01 TM 04 31389 09/04/96 Th-232 -1.34E+01 8.57E+00 3.61E+01 TM 04 31389 09/04/96 Zn-65 -3.17E+00 6.99E+00 2.65E+01 TM 04 31389 09/04/96 Zr-95 -3.66E+00 2.90E+00 1.29E+01 TM 09 31390 09/04/96 Ag-110M -0.38E+00 2.69E+00 1.04E+01 TM 09 31390 09/04/96 Ba-140 2.66E+00 3.07E+00 1.07E+01 TM 09 31390 09/04/96 Be-7 -2.05E+01 1.69E+01 5.90E+01 TM 09 31390 09/04/96 Ce-141 -2.06E+00 3.25E+00 1.10E+01 -

TM 09 31390 09/04/96 Ce-144 -3.53E+00 1.17E+01 3.87E+01 TM 09 31390 09/04/96 Co-57 2.48E+00 1.43E+00 4.21E+00 TM 09 31390 09/04/96 Co-58 -1.21E+00 1.77E+00 7.43E+00 TM 09 31390 09/04/96 Co-60 -4.49E+00 3.35E+00 1.46E+01 TM 09 31390 09/04/96 Cr-51 4.07E+00 1.72E+01 6.11E+01 TM 09 31390 09/04/96 Cs-134 -2.02E+00 1.86E+00 7.89E+00 TM 09 31390 09/04/96 Cs-137 2.97E+00 2.53E+00 8.63E+00 ;

TM 09 31390 09/04/96 Fe-59 8.07E+00 7.61E+00 2.59E+01 TM 09 31390 09/04/96 I-131 -4.75E-02 5.59E-02 0.47E+00 TM 09 31390 09/04/96 K-40 1.53E+03 1.12E+02 1.22E+02

TM 09 31390 09/04/96 Mn-54 0.65E+00 1.88E+00 6.86E+00 l TM 09 31390 09/04/96 Ru-103 -2.23E+00 2.11E+00 8.52E+00 TM 09 31390 09/04/96 Ru-106 -3.33E+01 1.77E+01 8.11E+01 TM 09 31390 09/04/96 Sb-124 -2.07E+00 1.96E+00 1.47E+01 TM 09 31390 09/04/96 Se-75 0.30E+00 2.66E+00 9.24E+00 l TM 09 31390 09/04/96 Th-232 -1.58E+01 8.14E+00 3.58E+01 '

TM 09 31390 09/04/96 Zn-65 -6.99E+00 6.33E+00 2.58E+01 TM 09 31390 09/04/96 Zr-95 -1.15E+00 3.42E+00 1.35E+01 TM 15 31391 09/04/96 Ag-111M 2.73E+00 2.49E+00 8.09E+00 TM 15 31391 09/04/96 Ba-14L -0.89E+00 2.22E+00 9.82E+00 TM 15 31391 09/04/96 Be-7 -1.15E+01 1.44E+01 5.59E+01 TM 15 31391 09/04/96 Ce-141 4.27E+00 2.92E+00 8.73E+00 TM 15 31391 09/04/96 Ce-144 -3.36E+00 1.23E+01 4.01E+01 TM 15 31391 09/04/96 Co-57 0.81E+00 1.41E+00 4.45E+00 TM 15 31391 09/04/96 Co-58 -2.62E+00 1.39E+00 6.34E+00 TM 15 31391 09/04/96 Co-60 0.51E+00 1.93E+00 7.31E+00 TM 15 31391 09/04/96 Cr-51 -8.77E+00 1.88E+01 6.74E+01 TM 15 31391 09/04/96 Cs-134 0.80E+00 1.83E+00 6.62E+00 TM 15 31391 09/04/96 Cs-137 0.37E+00 1.93E+00 7.25E+00 ,

TM 15 31391 09/04/96 Fe-59 -5.73E+00 5.83E+00 2.42E+01 l TM 15 31391 09/04/96 I-131 -2.23E-02 6.04E-02 0.36E+00 l TM 15 31391 09/04/96 K-40 1.83E+03 1.00E+02 1.00E+03 * !

TM 15 31391 09/04/96 Mn-54 1.90E+00 1.49E+00 4.77E+00 TM 15 31391 09/04/96 Ru-103 0.81E+00 1.69E+00 5.96E+00 TM 15 31391 09/04/96 Ru-106 6.30E+00 1.54E+01 5.72E+01 TM 15 31391 09/04/96 Sb-124 0.83E+00 3.05E+00 1.26E+01 l TM 15 31391 09/04/96 Se-75 -0.91E+00 2.19E+00 7.87E+00 l TM 15 31391 09/04/96 Th-232 1.14E+01 7.50E+00 2.34E+01 r

l

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 32291 10/16/96 Co-57 1.02E+00 1.21E+00 3.73E+00 TM 20 32291 10/16/96 Co-58 1.75E+00 1.35E+00 4.28E+00 TM 20 32291 10/16/96 Co-60 1.12E+00 1.51E+00 5.34E+00 TM 20 32291 10/16/96 Cr-51 6.13E+00 1 29E+01 4.38E+01 TM 20 32291 10/16/96 Cs-134 1.01E+00 1.25E+00 4.13E+00 TM 20 32291 10/16/96 Cs-137 -0.98E+00 1.45E+00 5.74E+00 TM 20 32291 10/16/96 Fe-59 -2.71E+00 4.17E+00 1.68E+01 TM 20 32291 10/16/96 I-131 4.98E-02 5.24E-02 0.24E+00 TM 20 32291 10/16/96 K-40 1.42E+03 7.60E+01 1.03E+02

TM 20 32291 10/16/96 Mn-54 0.00E+00 1.21E+00 4.38E+00 TM 20 32291 10/16/96 Ru-103 -0.68E+00 1.32E+00 4.98E+00 TM 20 32291 10/16/96 Ru-106 -1.52E+01 1.43E+01 5.65E+01 TM 20 32291 10/16/96 Sb-124 2.03E+00 2.28E+00 8.18E+00 TM 20 32291 10/16/96 Se-75 -3.77E+00 1.80E+00 6.86E+00 TM 20 32291 10/16/96 Th-232 -1.73E+00 5.27E+00 1.96E+01 TM 20 32291 10/16/96 Zn-65 -7.43E+00 3.65E+00 1.52E+01 TM 20 32291 10/16/96 Zr-95 1.33E+00 2.30E+00 7.87E+00 TM 21 32292 10/16/96 Ag-110M 1.19E+00 2.50E+00 8.77E+00 TM 21 32292 10/16/96 Ba-140 1.29E+00 3.38E+00 1.27E+01 TM 21 32292 10/16/96 Be-7 -7.19E+00 1.20E+01 4.76E+01 TM 21 32292 10/16/96 Ce-141 1.33E+00 3.10E+00 9.78E+00 TM 21 32292 10/16/96 Ce-144 1.07E+01 1.09E+01 3.34E+01 TM 21 32292 10/16/96 Co-57 0.35E+00 1.44E+00 4.56E+00 TM 21 32292 10/16/96 Co-58 -4.33E+00 2.01E+00 8.58E+00 TM 21 32292 10/16/96 Co-60 2.13E+00 2.93E+00 1.02E+01 j TM 21 32292 10/16/96 Cr-51 6.83E+00 1.81E+01 6.18E+01 l TM 21 32292 10/16/96 Cs-134 -0.71E+00 1.27E+00 4.77E+00 l TM 21 32292 10/16/96 Cs-137 2.71E+00 1.94E+00 6.46E+00 TM 21 32292 10/16/96 Fe-59 1.55E+00 5.81E+00 2.20E+01 TM 21 32292 10/16/96 I-131 1.97E-02 4.42E-02 0.24E+00 j TM 21 32292 10/16/96 K-40 1.37E+03 9.38E+01 1.07E+02

l TM 21 32292 10/16/96 Mn-54 3.78E+00 1.87E+00 5.38E+00 l TM 21 32292 10/16/96 Ru-103 0.12E+00 1.96E+00 7.05E+00 TM 21 32292 10/16/96 Ru-106 -2.94E+01 1.76E+01 7.50E+01 TM 21 32292 10/16/96 Sb-124 -1.63E+00 1.46E+00 1.12E+01 TM 21 32292 10/16/96 Se-75 4.63E+00 2.59E+00 8.06E+00 ,

TM 21 32292 10/16/96 Th-232 1.16E+00 7.12E+00 2.60E+01 TM 21 32292 10/16/96 Zn-65 0.72E+00 4.95E+00 1.73E+01 TM 21 32292 10/16/96 Zr-95 -2.23E+00 3.72E+00 1.50E+01 TM 04 33012 11/20/96 Ag-110M -0.82E+00 1.15E+00 4.06E+00 TM 04 33012 11/20/96 Ba-140 -1.28E+00 1.24E+00 5.02E+00 TM 04 33012 11/20/96 Be-7 -1.79E+00 7.51E+00 2.59E+01 TM 04 33012 11/20/96 Ce-141 1.86E+00 1.63E+00 4.89E+00 TM 04 33012 11/20/96 Ce-144 -6.73E+00 5.70E+00 1.83E+01 ,

TM 04 33012 11/20/96 Co-57 -0.12E+00 0.75E+00 2.33E+00 TM 04 33012 11/20/96 Co-58 0.28E+00 0.85E+00 2.82E+00 TM 04 33012 11/20/96 Co-60 1.40E+00 1.11E+00 3.62E+00 TM 04 33012 11/20/96 Cr-51 2.65E+00 9.81E+00 3.24E+01 TM 04 33012 11/20/96 Cs-134 0.25E+00 0.80E+00 2.62E+00 I

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

I Seabrook Nuclear Power Station '

Radiological Environmental Monitoring Data I (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 04 33012 11/20/96 Cs-137 3.01E+00 1.60E+00 5.68E+00 TM 04 33012 11/20/96 Fe-59 2.56E+00 3.15E+00 1.05E+01 TM 04 33012 11/20/96 I-131 2.71E-02 6.25E-02 0.33E+00 TM 04 33012 11/2'0/96 K-40 1.26E+03 4.36E+01 4.58E+01 * ,

TM 04 33012 11/20/96 Mn-54 -0.62E+00 0.84E+00 2.96E+00 :

TM 04 33012 11/20/96 Ru-103 -1.91E+00 1.00E+00 3.68E+00 !

TM 04 33012 11/20/96 Ru-106 -1.79E+01 7.68E+00 3.07E+01 TM 04 33012 11/20/96 Sb-124 1.68E+00 1.78E+00 5.97E+00 TM 04 33012 11/20/96 Se-75 -0.25E+00 1.22E+00 4.09E+00 TM 04 33012 11/20/96 Th-232 2.59E+00 2.96E+00 9.68E+00 TM 04 33012 11/20/96 Zn-65 -2.43E+00 2.30E+00 8.40E+00 TM 04 33012 11/20/96 Zr-95 -0.82E+00 1.47E+00 5.15E+00 TM 09 33013 11/20/96 Ag-110M -0.10E+00 1.20E+00 4.23E+00 TM 09 33013 11/20/96 Ba-140 -2.58E+00 1.78E+00 7.45E+00 TM 09 33013 11/20/96 Be-7 -1.80E+00 9.32E+00 3.25E+01 TM 09 33013 11/20/96 Ce-141 3.85E+00 1.97E+00 5.75E+00 TM 09 33013 11/20/96 Ce-144 1.51E+01 6.79E+00 1.97E+01 i TM 09 33013 11/20/96 Co-57 0.76E+00 0.87E+00 2.65E+00 '

TM 09 33013 11/20/96 Co-58 -0.58E+00 0.84E+00 3.14E+00 ;

TM 09 33013 11/20/96 Co-60 0.46E+00 1.12E+00 3.94E+00 '

TM 09 33013 11/20/96 Cr-51 -5.37E+00 1.14E+01 3.94E+01 TM 09 33013 11/20/96 Cs-134 0.46E+00 1.09E+00 3.54E+00 ;

TM 09 33013 11/20/96 Cs-137 3.34E+00 1.35E+00 4.21E+00 TM 09 33013 11/20/96 Fe-59 1.20E+00 3.57E+00 1.25E+01 TM 09 33013 11/20/96 I-131 -1.01E-02 5.05E-02 0.33E+00 TM 09 33013 11/20/96 K-40 1.38E+03 5.37E+01 5.72E+01

TM 09 33013 11/20/96 Mn-54 -0.64E+00 0.96E+00 3.47E+00 TM 09 33013 11/20/96 Ru-103 -1.26E+00 1.09E+00 4.04E+00 TM 09 33013 11/20/96 Ru-106 5.93E+00 1.04E+01 3.63E+01 TM 09 33013 11/20/96 Sb-124 4.40E+00 2.20E+00 6.34E+00 TM 09 33013 11/20/96 Se-75 -0.64E+00 1.40E+00 4.78E+00 TM 09 33013 11/20/96 Th-232 1.05E+01 3.96E+00 1.11E+01 TM 09 33013 11/20/96 Zn-65 4.73E+00 2.71E+00 8.54E+00 TM 09 33013 11/20/96 Zr-95 0.68E+00 1.75E+00 5.91E+00 i

TM 15 33014 11/20/96 Ag-110M -1.92E+00 1.38E+00 5.35E+00 TM 15 33014 11/20/96 Ba-140 -2.68E+00 2.09E+00 8.50E+00 TM 15 33014 11/20/96 Be-7 2.44E+00 9.29E+00 3.16E+01 TM 15 33014 11/20/96 Ce-141 -2.43E+00 2.08E+00 6.84E+00 TM 15 33014 11/20/96 Ce-144 -1.43E+01 6.63E+00 2.22E+01 TM 15 33014 11/20/96 Co-57 -0.61E+00 0.91E+00 2.89E+00 TM 15 33014 11/20/96 Co-58 -0.11E+00 1.15E+00 3.94E+00 TM 15 33014 11/20/96 Co-60 0.26E+00 1.18E+00 4.10E+00 TM 15 33014 11/20/96 Cr-51 1.33E+00 1.19E+01 3.98E+01 TM 15 33014 11/20/96 Cs-134 0.87E+00 0.93E+00 2.98E+00 TM 15 33014 11/20/96 Cs-137 0.74E+00 1.23E+00 4.26E+00 TM 15 33014 11/20/96 Fe-59 -0.41E+00 3.67E+00 1.29E+01 TM 15 33014 11/20/96 I-131 0.14E+00 0.11E+00 0.45E+00 TM 15 33014 11/20/96 K-40 1.66E+03 5.76E+01 5.67E+01

TM 15 33014 11/20/96 Mn-54 -0.35E+00 0.95E+00 3.35E+00 1

Radioactivity detected (i.e., Concentration > 3 Std. Deviations),

i i

_ _ _ _ _. .m . . _ . _ _ _ _ . _ _ _ _ _ _ _.__~ .- . _ _ _ . _ __

l 1

i Seabrook Nuclear Power Station Radiological Environmental Monitoring Data 1 (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg) i

, TM 15 33014 11/20/96 Ru-103 -1.83E+00 1.17E+00 4.39E+00 f TM 15 33014 11/20/96 Ru-106 2.30E+00 9.90E+00 3.52E+01 TM 15 33014 11/20/96 Sb-124 1.26E+00 2.35E+00 8.45E+00

TM 15 33014 11/20/96 Se-75 -0.60E+00 1.42E+00 4.82E+00 i'

TM 15 33014 11/20/96 Th-232 -1.74E+00 3.72E+00 1.37E+01 TM 15 33014 11/20/96 Zn-65 -1.93E+00 2.66E+00 9.75E+00 TM 15 33014 11/20/96 Zr-95 0.39E+00 1.88E+00 6.35E+00 TM 16 33015 11/20/96 Ag-110M 0.31E+00 1.53E+00 5.25E+00 TM 16 33015 11/20/96 Ba-140 -3.04E+00 2.26E+00 9.29E+00 TM 16 33015 11/20/96 Be-7 1.30E+01 1.14E+01 3.67E+01 TM 16 33015 11/20/96 Ce-141 -1.95E+00 1.97E+00 6.35E+00 TM 16 33015 11/20/96 Ce-144 7.24E+00 7.26E+00 2.19E+01 TM 16 33015 11/20/96 Co-57 -0.79E+00 0.91E+00 2.88E+00 TM 16 33015 11/20/96 Co-58 C.94E+00 1.43E+00 4.67E+00 TM 16 33015 11/20/96 Co-60 1.29E+00 1.45E+00 4.92E+00 TM 16 33015 11/20/96 Cr-51 -2.29E+01 1.28E+01 4.58E+01 TM 16 33015 11/20/96 Cs-134 4.88E-02 0.99E+00 3.21E+00 TM 16 33015 11/20/96 Cs-137 2.86E+00 1.75E+00 6.15E+00 i TM 16 33015 11/20/96 Fe-59 -5.39E+00 4.18E+00 1.64E+01 l TM 16 33015 11/20/96 I-131 -2.56E-02 5.41E-02 0.43E+00 TM 16 33015 11/20/96 K-40 1.96E+03 7.18E+01 7.71E+01

TM 16 33015 11/20/96 Mn-54 2.48E+00 1.36E+00 4.11E+00 I TM 16 33015 11/20/96 Ru-103 -0.17E+00 1.25E+00 4.37E+00 TM 16 33015 11/20/96 Ru-106 5.37E+00 1.29E+01 4.50E+01 TM 16 33015 11/20/96 Sb-124 0.68E+00 2.68E+00 9.90E+00 TM 16 33015 11/20/96 Se-75 1.24E+00 1.65E+00 5.34E+00 TM 16 33015 11/20/96 Th-232 6.02E+00 5.23E+00 1.68E+01 TM 16 33015 11/20/96 Zn-65 6.76E+00 3.50E+00 1.09E+01 TM 16 33015 11/20/96 Zr-95 -0.62E+00 2.64E+00 9.66E+00 TM 20 33016 11/20/96 Ag-110M -1.00E+00 1.36E+00 4.88E+00 TM 20 33016 11/20/96 Ba-140 -0.29E+00 1.68E+00 6.27E+00 TM 20 33016 11/20/96 Be-7 -1.96E+00 7.72E+00 2.73E+01 TM 20 33016 11/20/96 Ce-141 -5.24E+00 1.90E+00 6.45E+00 TM 20 33016 11/20/96 Ce-144 -3.68E+00 6.45E+00 2.05E+01 TM 20 33016 11/20/96 Co-57 -0.30E+00 0.81E+00 2.56E+00 TM 20 33016 11/20/96 Co-58 -1.82E+00 1.03E+00 3.87E+00 TM 20 33016 11/20/96 Co-60 0.51E+00 1.31E+00 4.54E+00 TM 20 33016 11/20/96 Cr-51 -1.10E+01 1.03E+01 3.63E+01 TM 20 33016 11/20/96 Cs-134 -0.35E+00 0.92E+00 3.14E+00 TM 20 33016 11/20/96 Cs-137 0.13E+00 1.11E+00 3.98E+00 TM 20 33016 11/20/96 Fe-59 -1.59E+00 3.31E+00 1.22E+01 TM 20 33016 11/20/96 I-131 0.12E+00 8.55E-02 0.34E+00 TM 20 33016 11/20/96 K-40 1.38E+03 5.18E+01 5.70E+01

TM 20 33016 11/20/96 Mn-54 -0.13E+00 0.90E+00 3.12E+00 TM 20 33016 11/20/96 Ru-103 -1.79E+00 1.08E+00 4.02E+00 TM 20 33016 11/20/96 Ru-106 -5.46E+00 9.71E+00 3.59E+01 TM 20 33016 11/20/96 Sb-124 1.09E+00 2.40E+00 8.41E+00 TM 20 33016 11/20/96 Se-75 -1.77E-02 1.39E+00 4.66E+00 TM 20 33016 11/20/96 Th-232 4.83E+00 3.98E+00 1.26E+01 3'

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

I i

1 Seabrook Nuclear Power Station l Radiological Environmental Monitoring Data (January - December 1996) ,

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

TM 20 33016 11/20/96 Zn-65 -1.46E+00 4.87E+00 1.87E+01 TM 20 33016 11/20/96 Zr-95 -0.12E+00 1.83E+00 6.27E+00 TM 21 33017 11/20/96 Ag-110M 1.02E+00 2.28E+00 7.78E+00 TM 21 l 33017 11/20/96 Ba-140 0.34E+00 2.77E+00 1.07E+01

! TM 21 33017 11/20/96 Be-7 2.15E+01 1.38E+01 4.36E+01 TM 21 33017 11/20/96 Ce-141 -1.24E+00 2.52E+00 8.21E+00

~

TM 21 33017 11/20/96 Ce-144 -4.98E+00 8.41E+00 2.73E+01 TM 21 33017 11/20/96 Co-57 1.08E+00 1.20E+00 3.66E+00 TM 21 33017 11/20/96 Co-58 -2.05E+00 1.39E+00 5.68E+00 TM 21 33017 11/20/96 Co-60 -4.01E+00 1.60E+00 8.55E+00 TM 21 33017 11/20/96 Cr-51 1.68E+01 1.47E+01 4.76E+01 TM 21 33017 11/20/96 Cs-134 1.30E+00 1.26E+00 4.16E+00 TM 21 33017 11/20/96 Cs-137 -1.32E+00 1.78E+00 6.88E+00 TM 21 33017 11/20/96 Fe-59 4.93E+00 5.22E+00 1.78E+01 TM 21 33017 11/20/96 I-131 -4.47E-02 3.81E-02 0.34E+00 TM 21 33017 11/20/96 K-60 1.28E+03 7.65E+01 1.03E+02

TM 21 33017 11/20/96 Mn-54 -0.35E+00 1.51E+00 5.45E+00 TM 21 33017 11/20/96 Ru-103 -2.65E+00 1.59E+00 6.30E+00 I TM 21 33017 11/20/96 Ru-106 -1.12E+01 1.69E+01 6.41E+01 TM 21 33017 11/20/96 Sb-124 -5.75E+00 3.85E+00 1.75E+01 TM 21 33017 11/20/96 Se-75 2.89E+00 2.00E+00 6.33E+00 TM 21 33017 11/20/96 Th-232 1.33E+00 6.25E+00 2.19E+01 TM 21 33017 11/20/96 Zn-65 3.26E+00 4.41E+00 1.51E+01 TM 21 33017 11/20/96 Zr-95 1.05E+00 3.14E+00 1.15E+01 TM 04 33478 12/18/96 Ag-110M 0.00E+00 1.68E400 5.79E+00 TM 04 33478 12/18/96 Ba-140 1.06E+00 2.20E+00 7,81E+00 TM 04 33478 12/18/96 Be-7 5.11E+00 9.98E+00 3.35E+01 TM 04 33478 12/18/96 Ce-141 -0.95E+00 1.98E+00 6.31E+00 TM 04 33478 12/18/96 Ce-144 4.27E+00 6.97E+00 2.13E+01 TM 04 33478 12/18/96 Co-57 -0.97E+00 0.85E+00 2.73E+00 TM 04 33478 12/18/96 Co-58 -0.41E+00 1.28E+00 4.47E+00 TM 04 33478 12/18/96 Co-60 0.42E+00 1.20E+00 4.32E+00 TM 04 33478 12/18/96 Cr-51 3.72E+00 1.15E+01 .3.85E+01 TM 04 33478 12/18/96 Cs-134 -0.94E+00 0.94E+00 3.24E+00 TM 04 33478 12/18/96 Cs-137 7.31E+00 1.91E+00 6.47E+00

TM 04 33478 12/18/96 Fe-59 -4.56E+00 4.56E+00 1.73E+01 I TM 04 33478 12/18/96 I-131 5.33E-02 8.56E-02 0.43E+00 l TM 04 K-40 1.26E+03 5.76E+01 33478 12/18/96 6.40E+01

TM 04 33478 12/18/96 Mn-54 1.30E+00 1.11E+00 3.51E+00 TM 04 33478 12/18/96 Ru-103 0.91E+00 1.35E+00 4.48E+00 TM 04 33478 12/18/96 Ru-106 1.34E+01 1.06E+01 3.55E+01 TM 04 33478 12/18/96 Sb-124 -1.64E+00 2.46E+00 1.02E+01 TM 04 33478 12/18/96 Se-75 0.19E+00 1.58E+00 5.24E+00 TM 04 33478 12/18/96 Th-232 -0.79E+00 4.63E+00 1.63E+01 TM 04 33478 12/18/96 Zn-65 -2,28E+00 3.15E+00 1.16E+01 TM 04 33478 12/18/96 Zr-95 4.40E+00 2.63E+00 8.59E+00 TM 09 33479 12/18/96 Ag-110M 2.24E+00 1.12E+00 3.36E+00 TM 09 33479 12/18/96 Ba-140 -9.00E-02 1.14E+00 4.16E+00 I

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

_ _ _ __ _ ___ - _ _ _ _ _ _ __ -- , . , ,,m _ . m. my- _ . , , , .. . _ . , _ _

l j Seabrook Nuclear Power Station j

Radiological Environmental Monitoring Data (January - December 1996) i SAMPLE CONC.

! TYPE STA. STD DEV. MDC LSN 4

END DATE NUCLIDE g)

(pCi/k (pCi/kg) (pCi/kg)

TM 09 33479 12/18/96 Be-7 0.50E+00 TM 6.47E+00 2.18E+01 09 33479 12/18/96 Ce-141 -0.51E+00 1.39E+00 4.39E+00 l TM 09 33479 12/18/96 Ce-144 0.53E+00 TM 5.00E+00 1.54E+01

, 09 33479 12/18/96 Co-57 -0.70E+00 0.62E+00 1.96E+00 TM 09 33479 12/18/96 Co-58

' 1.04E+00 0.80E+00 2.49E+00 TM 09 33479 12/18/96 Co-60 -9.41E-02 TM 0.78E+00 2.81E+00 09 33479 12/18/96 Cr-51 6.86E+00 7.92E+00 2.56E+01 TM 09 33479 12/18/96 Cs-134 -0.21E+00 0.72E+00 2.39E+00 TM 09 33479 12/18/96 Cs-137 1.39E+00 TM 0.92E+00 2.98E+00 09 33479 12/18/96 Fe-59 -2.08E+00 2.52E+00 9.18E+00 j TM- 09 33479 12/18/96 I-131 0.12E+00 9.29F-02 0.38E+00 T." 09 33479 12/18/96 K-40 1.44E+03 4.10E+01 4.49E+01

TM 09 33479 12/18/96 Mn-54 -3.97E-02 0.74E+00 2.47E+00 l TM 09 33479 12/18/96 Ru-103 0.47E+00 0.86E+00 2.83E+00 i

TM 09 33479 12/18/96 Ru-106 3.41E+00 6.59E+00 2.29E+01

TM 09 33479 12/18/96 Sb-124

' 1.68E+00 1.69E+00 5.55E+00 TM 09 33479 12/18/96 Se-75 -0.38E+00 0.99E+00 3.33E+00 TM 09 33479 12/18/96 Th-232 -1.78E+00 2.78E+00 9.62E+00

, TM 09 33479 12/18/96 Zn-65 -7.24E-02 2.05E+00 7.05E+00 TM 09 33479 12/18/96 Zr-95 -1.13E+00 1.38E+00 4.79E+00 TM 15 33480 12/18/96 Ag-110M 2.90E+00 1.60E+00 4.81E+00 TM 15 33480 12/18/96 Ba-140 -2.07E+00 2.18E+00 8.90E+00 TM 15 33480 12/18/96 Be-7 1.68E+01 1.13E+01 3.58E+01 TM 15 33480 12/18/96 Ce-141 1.48E+00 2.21E+00 6.84E+00 TM 15 33480 12/18/96 Ce-144 -3.63E+00 7.42E+00 2.35E+01 TM 15 33480 12/18/96 Co-57 0.23E+00 0.93E+00 2.89E+00 TM 15 33480 12/18/96 Co-58 0.42E+00 1.27E+00 4.29E+00 TM 15 33480 12/18/96 Co-60 0.37E+00 1.22E+00 4.42E+00 TM 15 33480 12/18/96 Cr-51 4.40E+00 1.22E+01 4.06E+01 TM 15 33480 12/18/96 Cs-134 0.41E+00 1.41E+00 4.62E+00 TM 15 33480 12/18/96 Cs-137 -1.99E+00 1.26E+00 5.00E+00 TM 15 33480 12/18/96 Fe-59 -0.67E+00 4.17E+00 1.53E+01 i TM 15 33480 12/18/96 I-131 3.48E-02 4.18E-02 0.18E+00 TM 15 33480 12/18/96 K-40 1.63E+03 6.63E+01 7.43E+01

TM 15 33480 12/18/96 Mn-54 0.82E+00 1.17E+00 3.84E+00 l TM 15 33480 12/18/96 Ru-103 0.69E+00 1.35E+00 4.55E+00 TM 15 33480 12/18/96 Ru-106 4.21E+00 1.15E+01 4.07E+01 TM 15 33480 12/18/96 Sb-124 0.00E+00 2.64E+00 1.01E+01 TM 15 33480 12/18/96 Se-75 -2.18E+00 1.61E+00 5.65E+00 TM 15 33480 12/18/96 Th-232 9.61E+00 4.92E+00 1.50E+01 TM 15 33480 12/18/96 Zn-65 -0.92E+00 3.40E+00 1.22E+01 TM 15 33480 12/18/96 Zr-95 -0.90E+00 2.08E+00 7.41E+00 TM 16 33481 12/18/96 Ag-110M -0.49E+00 1.20E+00 4.15E+00 TM 16 33481 12/18/96 Ba-140 3.66E+00 1.87E+00 5.57E+00 TM 16 33481 12/18/96 Be-7 1.08E+00 8.65E+00 2.92E+01 I TM 16 33481 12/18/96 Ce-141 0.42E+00 1.80E+00 5.53E+00 TM 16 33481 12/18/96 Ce-144 1.08E+01 6.14E+00 1.81E+01 !

TM 16 33481 12/18/96 Co-57 1.77E+00 0.78E+00 2.28E+00 TM 16 33481 12/18/96 Co-58 -1.01E+00 0.98E+00 3.47E+00

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

_- -._ - - - -- - ~ - - .--,...n...., n . . .- ,

t Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC.

TYPE STD DEV. MDC t STA. LSN END DATE NUCLIDE

pCi/kg)

(pCi/kg) ( (pCi/kg)

TM 16 33481 12/18/96 Co-60 -0.14E+00 1.00E+00 3.57E+00 TM 16 33481 12/18/96 Cr-51 -3.59E+00 1.13E+01 3.81E+01 TM 16 33481 12/18/96 Cs-134 0.10E+00 0.84E+00 2.78E+00 TM 16 33481 12/18/96 Cs-137 4.41E+00 1.50E+00 4.88E+00 TM 16 33481 12/18/96 Fe-59 0.20E+00 {

3.11E+00 1.09E+01 TM 16 33481 12/18/96 I-131 1.81E-02 3.35E-02 0.15E+00 TM 16 33481 12/18/96 K-40 1.83E+03 5.16E+01 4.19E+01

TM 16 33481 12/18/96 Mn-54 -1.25E+00 0.85E+00 3.09E+00 l TM 16 33481 12/18/96 Ru-103 -1.12E+00 1.11E+00 3.93E+00 TM 16 33481 12/18/96 Ru-106 -1.72E+00 8.16E+00 2.95E+01 j

TM 16 33481 12/18/96 Sb-124 0.00E+00 1.86E+00 6.86E+00 TM 16 33481 12/18/96 Se-75 0.41E+00 1.30E+00 i

4.25E+00 TM 16 33481 12/18/96 t

Th-232 5.37E+00 3.72E+00 1.16E+01 TM 16 33481 12/18/96 Zn-65 2.08E+00 2.56E+00 8.50E+00 '

l TM 16 33481 12/18/96 Zr-95 -1.61E+00 1.70E+00 6.00E+00 TM 20 33482 12/18/96 Ag-110M 1.51E+00 1.31E+00 4.27E+00 TM 20 33482 12/18/96 Ba-140 -0.40E+00 1.81E+00 6.80E+00 TM 20 33482 12/18/96 Be-7 1.44E+01 8.01E+00 2.49E+01 TM 20 33482 12/18/96 Ce-141 -3.37E+00 1.93E+00 6.32E+00 TM 20 33482 12/18/96 Ce-144 ~5.03E+00 6.08E+00 1.92E+01 TM 20 33482 12/18/96 Co-57 1.52E+00 0.78E+00 2.29E+00 TM 20 33482 12/18/96 Co-58 0.25E+00 0.84E+00 2.81E+00 TM 20 33482 12/18/96 Co-60 -0.51E+00 0.93E+00 3.36E+00 TM 20 33482 12/18/96 Cr-51 6.87E+00 1.07E+01 3.50E+01 TM 20 33482 12/18/96 Cs-134 -4.04E-02 0.82E+00 2.71E+00 TM 20 33482 12/18/96 Cs-137 1.26E+00 0.95E+00 3.16E+00 TM 20 33482 12/18/96 Fe-59 1.71E+00 3.30E+00 1.10E+01 TM 20 33482 12/18/96 I-131 6.20E-02 6.93E-02 0.32E+00 TM 20 33482 12/18/96 K-40 1.40E+03 4.53E+01 5.07E+01

TM 20 33482 12/18/96 Mn-54 -1.73E+00 0.81E+00 3.05E+00 TM 20 33482 12/18/96 Ru-103 -2.86E+00 1.15E+00 4.29E+00 TM 20 33482 12/18/96 Ru-106 1.67E+01 8.25E+00 2.65E+01 TM 20 33482 12/18/96 Sb-124 3.13E+00 2.00E+00 6.40E+00 TM 20 33482 12/18/96 Se-75 0.25E+00 1.24E+00 4.09E+00 TM 20 33482 12/18/96 Th-232 3.29E+00 3.67E+00 1.22E+01 TM 20 33482 12/18/96 Zn-65 -1.40E+00 2.13E+00 7.67E+00 TM 20 33482 12/18/96 Zr-95 2.15E+00 1.74E+00 5.44E+00 TM 21 33483 12/18/96 Ag-110M -1.46E+00 1.08E+00 3.94E+00 l TM 21 33483 12/18/96 Ba-140 2.76E+00 1.68E+00 5.17E+00 i TM 21 33483 12/18/96 Be-7 -3.22E+00 7.19E+00 2.51E+01 TM 21 33483 12/18/96 Ce-141 -3.24E+00 l 1.56E+00 5.19E+00 1 TM 21 33483 12/18/96 Ce-144 1.60E+00 5.41E+00 1.67E+01 TM 21 33483 12/18/96 Co-57 -1.10E+00 0.66E+00 2.16E+00 TM 21 33483 12/18/96 Co-58 -0.48E+00 0.87E+00 3.03E+00 TM 21 33483 12/18/96 Co-60 0.58E+00 0.92E+00 3.13E+00 TM 21 33483 12/18/96 Cr-51 0.61E+00 8.85E+00 2.97E+01 TM 21 33483 12/18/96 Cs-134 1.34E+00 0.76E+00 2.32E+00 TM 21 33483 12/18/96 Cs-137 2.13E+00 0.91E+00 2.87E+00 TM 21 33483 12/18/96 Fe-59 -3.23E+00 2.95E+00 1.10E+01

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l I

. _ . _ . . _ . _ . _ - _ . - -m. - . . _ . = _ . _ - _ . . . _ ~ . ~ _ - . . , _ . . _ . . . ,, . , , . . . .

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pci/kg) (pCi/kg) (pCi/kg)

TM 21 33483 12/18/96 I-131 -3.64E-03 3.41E-02 0.17E+00 TM 21 33483 12/18/96 K-40 1.39E+03 4.44E+01 5.00E+01

TM 21 33483 12/18/96 Mn-54 -0.53E+00 0.78E+00 2.72E+00 TM 21 33483 12/18/96 Ru-103 -1.80E+00 0.89E+00 3.35E+00 TM 21 33483 12/18/96 Ru-106 3.86E+00 7.31E+00 2.55E+01 TM 21 33483 12/18/96 Sb-124 2.09E+00 1.84E+00 6.02E+00 l TM 21 33483 12/18/96 Se-75 0.78E+00 1.14E+00 3.69E+00 TM 21 33483 12/18/96 Th-232 4.97E+00 2.95E+00 9.10E+00 TM 21 33483 12/18/96 Zn-65 -0.20E+00 2.25E+00 7.82E+00 TM 21 33483 12/18/96 Zr-95 -1.21E+00 1.55E+00 5.45E+00 l

l l

f

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

. _ . - . . _ - --. ,, n+ .- -

l l

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV.

TYPE MDC STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) ( pCi/kg)

a-------- ---------

Ground Water '

WG 01 28298 03/11/96 Ag-110M -1.11E+00 1.68E+00 6.36E+00 l WG 01 28298 03/11/96 Ba-140 1.88E+00 1.87E+00 6.50E+00 i WG 01 28298 03/11/96 Be-7 -6.10E+00 1.01E+01 3.69E+01 -

WG 01 28298 03/11/96 Ce-141 -0.24E+00 2.07E+00 6.79E+00 WG 01 28298 03/11/96 Ce-144 1.17E+01 7.78E+00 2.45E+01 WG 01 28298 03/11/96 Co-57 1.29E+00 0.95E+00 3.01E+00 WG 01 28298 03/11/96 Co-58 -1.36E+00 1.14E+00 4.34E+00 i

WG 01 28298 03/11/96 Co-60 -0.88E+00 1.30E+00 5.23E+00 l WG 01 28298 03/11/96 Cr-51 -3.46E+00 1.05E+01 3.74E+01 ;

WG 01 28298 03/11/96 Cs-134 -5.22E+00 3.76E+00 1.41E+01 :

WG 01 28298 03/11/96 Cs-137 0.57E+00 1.41E+00 5.11E+00 l WG 01 28298 03/11/96 Fe-59 -0.98E+00 4.02E+00 1.54E+01 l WG 01 28298 03/11/96 GR-B 4.68E+00 0.52E+00 1.39E+00

WG 01 28298 03/11/96 H-3 1.19E+02 2.54E+02 8.21E+02 WG 01 28298 03/11/96 I-131 1.33E+00 2.29E+00 7.87E+00 WG 01 28298 03/11/96 K-40 3.21E+01 1.66E+01 5.18E+01 WG 01 28298 03/11/96 Mn-54 0.19E+00 1.06E+00 3.73E+00 WG 01 28298 03/11/96 Ru-103 0.38E+00 1.32E+00 4.63E+00 WG 01 28298 03/11/96 Ru-106 1.33E+01 1.05E+01 3.66E+01 WG 01 28298 03/11/96 Sb-124 -4.21E+00 2.88E+00 1.25E+01 )

WG 01 28298 03/11/96 Se-75 1.10E+00 1.33E+00 4.31E+00 WG 01 28298 03/11/96 Th-232 1.17E+00 5.22E+00 1.85E+01 WG 01 28298 03/11/96 Zn-65 2.71E+00 6.11E+00 2.33E+01 WG 01 28298 03/11/96 Zr-95 -1.58E+00 1.90E+00 7.14E+00 WG 13 28299 03/11/96 Ag-110M 0.00E+00 1.87E+00 7.11E+00 WG 13 28299 03/11/96 Ba-140 0.60E+00 2.13E+00 8.45E+00 WG 13 28299 03/11/96 Be-7 1.65E+00 1.20E+01 4.37E+01 WG 13 28299 03/11/96 Ce-141 -1.81E+00 2.37E+00 8.08E+00 WG 13 28299 03/11/96 Ce-144 -3.57E+00 8.39E+00 2.84E+01 WG 13 28299 03/11/96 Co-57 -0.53E+00 1.06E+00 3.60E+00 WG 13 28299 03/11/96 Co-58 -1.78E+00 1.51E+00 5.96E+00 WG 13 28299 03/11/96 Co-60 3.24E+00 1.70E+00 5.44E+00 WG 13 28299 03/11/96 Cr-51 -4.32E+00 1.43E+01 5.18E+01 WG 13 28299 03/11/96 Cs-134 -9.95E+00 3.63E+00 1.42E+01 WG 13 28299 03/11/96 Cs-137 -1.05E+00 1.54E+00 6.14E+00 WG 13 28299 03/11/96 Fe-59 -5.42E+00 5.05E+00 2.12E+01 WG 13 28299 03/11/96 GR-B 3.36E+00 0.47E+00 1.34E+00

WG 13 28299 03/11/96 H-3 9.76E+01 2.49E+02 8.07E+02 WG 13 28299 03/11/96 I-131 0.36E+00 3.18E+00 1.14E+01 WG 13 28299 03/11/96 K-40 -1.62E+01 2.17E+01 8.42E+01 WG 13 28299 03/11/96 Mn-54 -1.07E+00 1.34E+00 5.20E+00 WG 13 28299 03/11/96 Ru-103 0.23E+00 1.50E+00 5.44E+00 WG 13 28299 03/11/96 Ru-106 2.27E+00 1.29E+01 4.88E+01 WG 13 28299 03/11/96 Sb-124 -0.19E+00 3.92E+00 1.56E+01 WG 13 28299 03/11/96 Se-75 -0.73E+00 1.85E+00 6.36E+00 WG 13 28299 03/11/96 Th-232 -7.38E+00 5.53E+00 2.26E+01 WG 13 28299 03/11/96 Zn-65 -2.56E+00 3.36E+00 1.35E+01 WG 13 28299 03/11/96 Zr-95 2.22E+00 2.4BE+00 8.42E+00

)

Radioactivity detected (i.e. , Concentration > 3 Std. Deviations) .

r .

I 1

Seabrook Nuclear Power Station i Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WG 01 29861 06/12/96 Ag-110M -0.45E+00 1.56E+00 5.77E+00 WG 01 29861 06/12/96 Ba-140 2.55E+00 1.92E+00 6.43E+00 WG 01 29861 06/12/96 Be-7 1.49E+01 8.40E+00 2.72E+01 l WG 01 29861 06/12/96 Ce-141 4.91E+00 2.36E+00 7.32E+00 WG 01 29861 06/12/96 Ce-144 1.63E+00 8.20E+00 2.68E+01 WG 01 29861 06/12/96 Co-57 -1.39E+00 1.05E+00 3.59E+00 WG 01 29861 06/12/96 Co-58 -0.39E+00 1.06E+00 3.86E+00 WG 01 29861 06/12/96 Co-60 0.11E+00 1.00E+00 3.66E+00 WG 01 29861 06/12/96 Cr-51 2.82E+00 1.15E+01 4.00E+01 WG 01 29861 06/12/96 Cs-134 1.06E+00 3.05E+00 1.10E+01 WG 01 29861 06/12/96 Cs-137 -1.57E+00 1.16E+00 4.64E+00 l WG 01 29861 06/12/96 Fe-59 -0.50E+00 2.79E+00 1.04E+01 WG 01 29861 06/12/96 GR-B 4.42E+00 0.52E+00 1.44E+00

j WG 01 29861 06/12/96 H-3 1.26E+02 2.32E+02 7.46E+02 i WG 01 29861 06/12/96 I-131 -2.93E+00 2.44E+00 9.10E+00 I WG 01 29861 06/12/96 K-40 1.87E+01 1.54E+01 5.24E+01 '

WG 01 29861 06/12/96 Mn-54 0.57E+00 0.99E+00 3.48E+00 i WG 01 29861 06/12/96 Ru-103 -0.46E+00 1.12E+00 4.13E+00 WG 01 i 29861 06/12/96 Ru-106 1.98E+00 8.89E+00 3.31E+01 WG 01 Sb-124 )

29861 06/12/96 -1.24E+00 2.18E+00 9.00E+00 i WG 01 29861 06/12/96 Se-75 -0.45E+00 1.64E+00 5.74E+00 WG 01 29861 06/12/96 Th-232 -2.09E+00 4.05E+00 1.52E+01 WG 01 29861 06/12/96 Zn-65 -1.59E+00 5.45E+00 2.11E+01 WG 01 29861 06/12/96 Zr-95 -0.30E+00 1.64E+00 5.98E+00 WG 13 29862 06/12/96 Ag-110M -0.51E+00 1.91E+00 7.36E+00 WG 13 29862 06/12/96 Ba-140 -2.38E+00 2.41E+00 1.08E+01 WG 13- 29862 06/12/96 Be-7 1.34E+01 1.14E+01 3.86E+01 WG 13 29862 06/12/96 Ce-141 -2.96E+00 2.72E+00 9.41E+00 WG 13 29862 06/12/96 Ce-144 0.00E+00 8.94E+00 3.00E+01 WG 13 29862 06/12/96 Co-57 0.70E+00 1.24E+00 4.06E+00 WG 13 29862 06/12/96 Co-58 -1.89E+00 1.64E+00 6.55E+00 WG 13 29862 06/12/96 Co-60 -0.30E+00 1.66E+00 6.69E+00 WG 13 29862 06/12/96 Cr-51 -1.17E+01 1.65E+01 6.05E+01 WG 13 29862 06/12/96 Cs-134 0.22E+00 1.37E+00 5.05E+00 WG 13 29862 06/12/96 Cs-137 0.58E+00 1.47E+00 5.56E+00 WG 13 29862 06/12/96 Fe-59 -3.21E+00 5.14E+00 2.09E+01 WG 13 29862 06/12/96 GR-B 5.55E+00 0.62E+00 1.71E+00

WG 13 29862 06/12/96 H-3 7.07E+01 2.37E+02 7.68E+02 WG 13 29862 06/12/96 I-131 1.60E+00 3.62E+00 1.27E+01 WG 13 29862 06/12/96 K-40 -1.82E+01 2.07E+01 8.63E+01 j WG 13 29862 06/12/96 Mn-54 -1.91E+00 1.35E+00 5.65E+00 l WG 13 29862 06/12/96 Ru-103 -3.09E+00 1.70E+00 6.94E+00 WG l 13 29862 06/12/96 Ru-106 -1.77E+01 1.60E+01 6.49E+01 i WG 13 29862 06/12/96 Sb-124 -6.78E+00 3.76E+00 1.80E+01 WG 13 29862 06/12/96 Se-75 -1.52E+00 1.70E+00 6.12E+00 l WG 13 29862 06/12/96 Th-232 1.02E+01 6.53E+00 2.10E+01 WG l 13 29862 06/12/96 Zn-65 -7.81E+00 3.25E+00 1.51E+01 i WG 13 29862 06/12/96 Zr-95 -3.35E+00 2.89E+00 1.22E+01

) l

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/k

_____________________.________________ ___________________________________g)

WG 01 31588 09/12/96 Ag-110M 1.11E+00 1.40E+00 4.71E+00 WG 01 31588 09/12/96 Ba-140 -0.78E+00 1.75E+00 6.58E+00 WG 01 31588 09/12/96 Be-7 -1.68E+01 8.92E+00 3.30E+01 WG 01 31588 09/12/96 Ce-141 -2.08E+00 1.93E+00 6.27E+00 WG 01 31588 09/12/96 Ce-144 -0.42E+00 6.94E+00 2.16E+01 c WG 01 31588 09/12/96 Co-57 1.29E+00 0.86E+00 2.57E+00 WG 01 31588 09/12/96 Co-58 -0.30E+00 0.93E+00 3.25E+00 WG 01 31588 09/12/96 Co-60 -0.37E+00 0.85E+00 3.21E+00 WG 01 31588 09/12/96 Cr-51 -9.81E+00 1.00E+01 3.49E+01 <

WG 01 31588 09/12/96 Cs-134 -0.81E+00 0.86E+00 3.03E+00 WG 01 31588 09/12/96 Cs-137 -1.11E+00 0.95E+00 3.67E+00 WG 01 31588 09/12/96 Fe-59 -2.83E+00 2.58E+00 9.91E+00 WG 01 31588 09/12/96 GR-B 6.22E+00 0.51E+00 1.34E+00

WG 01 31588 09/12/96 H-3 -9.01E+01 2.22E+02 7.43E+02 WG 01 31588 09/12/96 I-131 -2.10E+00 1.94E+00 6.94E+00 WG 01 31588 09/12/96 K-40 -5.06E+00 1.50E+01 5.52E+01 l WG 01 31588 09/12/96 Mn-54 -1.00E+00 0.88E+00 3.24E+00 !

WG 01 31588 09/12/96 Ru-103 -0.32E+00 1.13E+00 3.93E+00 WG 01 31588 09/12/96 Ru-106 2.09E+00 7.38E+00 2.66E+01 WG 01 31588 09/12/96 Sb-124 -0.72E+00 2.14E+00 8.30E+00 WG 01 31588 09/12/96 Se-75 1.67E+00 1.34E+00 4.29E+00 WG 01 31588 09/12/96 Th-232 -4.17E+00 3.50E+00 1.33E+01 WG 01 31588 09/12/96 Zn-65 0.24E+00 1.71E+00 5.84E+00 WG 01 31588 09/12/96 Zr-95 -2.18E+00 1.46E+00 5.56E+00 WG 13 31589 09/12/96 Ag-110M 0.29E+00 1.21E+00 4.58E+00 WG 13 31589 09/12/96 Ba-140 0.62E+00 1.78E+00 6.84E+00 WG 13 31589 09./12/96 Be-7 2.55E+00 9.13E+00 3.30E+01 WG 13 31589 09/12/96 Ce-141 0.79E+00 2.10E+00 6.78E+00 WG 13 31589 09/12/96 Ce-144 1.48E+00 7.64E+00 2.46E+01 WG 13 31589 09/12/96 Co-57 -0.80E+00 0.98E+00 3.31E+00 WG 13 31589 09/12/96 Co-58 1.27E+00 0.92E+00 2.88E+00 WG 13 31589 09/12/96 Co-60 -0.77E+00 1.11E+00 4.89E+00 WG 13 31589 09/12/96 Cr-51 1.71E+01 1.28E+01 4.09E+01 WG 13 31589 09/12/96 Cs-134 0.75E+00 1.22E+00 4.10E+00 WG 13 31589 09/12/96 Cs-137 0.00E+00 1.22E+00 4.72E+00 WG 13 31589 09/12/96 Fe-59 2.94E+00 3.06E+00 1.07E+01 WG 13 31589 09/12/96 GR-B 9.23E+00 0.98E+00 2.69E+00

WG 13 31589 09/12/96 H-3 -1.88E+02 2.20E+02 7.52E+02 WG 13 31589 09/12/96 I-131 2.03E+00 2.62E+00 8.79E+00 WG 13 31589 09/12/96 K-40 1.45E+01 1.90E+01 6.97E+01 WG 13 31589 09/12/96 Mn-54 0.93E+00 1.09E+00 3.66E+00 l WG 13 31589 09/12/96 Ru-103 -0.72E+00 1.19E+00 4.61E+00 WG 13 31589 09/12/96 Ru-106 0.00E+00 9.85E+00 3.84E+01 WG 13 31589 09/12/96 Sb-124 -3.50E+00 2.47E+00 1.22E+01 WG 13 31589 09/12/96 Se-75 -1.83E+00 1.62E+00 6.01E+00 WG 13 31589 09/12/96 Th-232 3.00E+00 4.64E+00 1.63E+01 WG 13 31589 09/12/96 Zn-65 0.16E+00 2.64E+00 1.01E+01 WG 13 31589 09/12/96 Zr-95 2.80E+00 1.88E+00 5.81E+00

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

L _ _ - -

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg)

WG 01 33273 12/06/96 Ag-110M -1.45E+00 1.30E+00 5.00E+00 WG 01 33273 12/06/96 Ba-140 -1.06E+00 1.43E+00 5.73E+00 WG 01 33273 12/06/96 Be-7 -1.53E+01 7.99E+00 3.06E+01 WG 01 33273 12/06/96 Ce-141 -1.70E+00 1.94E+00 6.31E+00 WG 01 33273 12/06/96 Ce-144 -3.71E+00 7.15E+00 2.27E+01 WG 01 33273 12/06/96 Co-57 -3.95E-02 0.89E+00 2.80E+00 WG 01 33273 12/06/96 Co-58 1.24E+00 0 95E+00 2.99E+00 WG 01 33273 12/06/96 Co-60 0.30E+00 0.85E+00 3.03E+00 WG 01 33273 12/06/96 Cr-51 9.57E+00 9.34E+00 3.02E+01 WG 01 33273 12/06/96 Cs-134 -5.10E+00 3.14E+00 1.12E+01 WG 01 33273 12/06/96 Cs-137 0.27E+00 0.93E+00 3.36E+00 WG 01 33273 12/06/96 Fe-59 -1.06E+00 2.43E+00 9.16E+00 WG 01 33273 12/06/96 GR-B 3.91E+00 0.52E+00 1.49E+00

WG 01 33273 12/06/96 H-3 6.86E+01 2.27E+02 7.35E+02 WG 01 33273 12/06/96 I-131 0.82E+00 1.94E+00 6.48E+00 WG 01 33273 12/06/96 K-40 -3.30E+01 1.33E+01 5.44E+01 WG 01 33273 12/06/96 Mn-54 -1.53E+00 0.84E+00 3.29E+00 WG 01 33273 12/06/96 Ru-103 -1.39E+00 1.01E+00 3.79E+00 WG 01 33273 12/06/96 Ru-106 0.00E+00 9.81E+00 3.54E+01 WG 01 33273 12/06/96 Sb-124 2.08E+00 2.46E+00 8.53E+00 WG 01 33273 12/06/96 Se-75 -1.15E+00 1.45E+00 5.00E+00 WG 01 33273 12/06/96 Th-232 0.91E+00 3.54E+00 1.25E+01 WG 01 33273 12/06/96 Zn-65 1.22E+01 5.15E+00 1.81E+01 WG 01 33273 12/06/96 Zr-95 2.46E+00 1.49E+00 4.52E+00 WG 13 33272 12/06/96 Ag-110M 0.72E+00 0.97E+00 3.26E+00 WG 13 33272 12/06/96 Ba-140 0.76E+00 1.63E+00 5.68E+00 WG 13 33272 12/06/96 Be-7 2.91E+00 7.05E+00 2.42E+01 WG 13 33272 12/06/96 Ce-141 -0.66E+00 1.54E+00 4.95E+00 WG 13 33272 12/06/96 Ce-144 -2.70E+00 6.01E+00 1.93E+01 WG 13 33272 12/06/96 Co-57 6.16E-02 0.78E+00 2.46E+00 WG 13 33272 12/06/96 Co-58 0.53E+00 0.71E+00 2.38E+00 WG 13 33272 12/06/96 Co-60 -1.93E+00 0.83E+00 3.80E+00 WG 13 33272 12/06/96 Cr-51 0.00E+00 8.81E+00 3.01E+01 WG 13 33272 12/06/96 Cs-134 0.32E+00 0.81E+00 2.72E+00 WG 13 33272 12/06/96 Cs-137 0.28E+00 0.94E+00 3.39E+00 WG 13 33272 12/06/96 Fe-59 5.95E+00 2.42E+00 6.76E+00 WG 13 33272 12/06/96 GR-B 2.44E+00 0.43E+00 1.29E+00

WG 13 33272 12/06/96 H-3 2.78E+02 2.23E+02 6.94E+02 WG 13 33272 12/06/96 I-131 0.88E+00 1.71E+00 5.75E+00 WG 13 33272 12/06/96 K-40 0.00E+00 1.29E+01 4.70E+01 WG 13 33272 12/06/96 Mn-54 9.71E-02 0.78E+00 2.73E+00 WG 13 33272 12/06/96 Ru-103 0.16E+00 0.88E+00 3.06E+00 WG 13 33272 12/06/96 Ru-106 -1.31E+01 8.00E+00 3.26E+01 WG 13 33272 12/06/96 Sb-124 -1.44E+00 1.86E+00 7.75E+00 WG 13 33272 12/06/96 Se-75 0.69E+00 1.28E+00 4.22E+00 WG 13 33272 12/06/96 Th-232 -3.24E+00 3.66E+00 1.35E+01 WG 13 33272 12/06/96 Zn-65 -2.90E+00 3.39E+00 1.33E+01 WG 13 33272 12/06/96 Zr-95 -0.39E+00 1.71E+00 6.01E+00

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data ]

(January - December 1996) 4 SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (

__________________________________________________________pCi/kg) (pCi/kg)

Sea Water WS 01 27680 01/22/96 Ag-110M -0.83E+00 1.03E+00 3.76E+00 WS 01 27680 01/22/96 Ba-140 -0.46E+00 1.85E+00 6.81E+00 WS 01 27680 01/22/96 Be-7 -5.53E+00 6.45E+00 2.31E+01 WS 01 27680 01/22/96 Ce-141 -2.06E+00 1.35E+00 4.51E+00 WS 01 27680 01/22/96 Ce-144 -1.10E+00 4.32E+00 1.40E+01 WS 01 27680 01/22/96 Co-57 -3.35E-03 0.55E+00 1.77E+00 WS 01 27680 01/22/96 Co-58 -0.21E+00 0.71E+00 2.48E+00 WS 01 27680 01/22/96 Co-60 -1.47E+00 0.80E+00 3.23E+00 WS 01 27680 01/22/96 Cr-51 3.47E+00 7.88E+00 2.68E+01 WS 01 27680 01/22/96 Cs-134 -0.26E+00 1.31E+00 4.00E+00 WS 01 27680 01/22/96 Cs-137 1.04E+00 0.75E+00 WS 2.59E+00 01 27680 01/22/96 Fe-59 2.59E+00 2.43E+00 8.43E+00 WS 01 27680 01/22/96 I-131 1.12E+00 2.67E+00 9.11E+00 WS 01 27680 01/22/96 K-40 2.93E+02 2.03E+01 4.27E+01

WS 01 27680 01/22/96 Mn-54 -0.26E+00 0.59E+00 2.08E+00 WS 01 27680 01/22/96 Ru-103 -1.74E+00 0.87E+00 3.23E+00 WS 01 27680 01/22/96 Ru-106 -2.52E+00 6.99E+00 2.56E+01 WS 01 27680 01/22/96 Sb-124 -0.27E+00 2.09E+00 7.67E+00 WS 01 27680 01/22/96 Se-75 1.52E+00 0.86E+00 2.71E+00 WS 01 27680 01/22/96 Th-232 -4.49E+00 2.86E+00 1.07E+01 WS 01 27680 01/22/96 Zn-65 -4.62E+00 1.70E+00 6.68E+00 WS 01 27680 01/22/96 Zr-95 1.16E+00 1.34E+00 4.41E+00 WS 51 27681 01/22/96 Ag-110M 0.55E+00 0.97E+00 3.36E+00 WS 51 27681 01/22/96 Ba-140 0.64E+00 1.90E+00 6.75E+00 WS 51 27681 01/22/96 Be-7 2.27E+00 6.04E+00 2.08E+01 WS 51 27681 01/22/96 Ce-141 0.50E+00 1.29E+00 4.15E+00 WS 51 27681 01/22/96 Ce-144 1.94E+00 4.27E+00 1.37E+01 WS 51 27681 01/22/96 Co-57 -0.21E+00 0.55E+00 1.78E+00 WS 51 27681 01/22/96 Co-58 0.54E+00 0.73E+00 2.42E+00 WS 51 27681 01/22/96 Co-60 -0.33E+00 0.83E+00 3.10E+00 WS 51 27681 01/22/96 Cr-51 1.28E+00 8.00E+00 2.74E+01 WS 51 27681 01/21/96 Cs-134 -3.43E-02 1.43E+00 4.32E+00 WS 51 27681 01/22/96 Cs-137 9.17E-02 0.74E+00 2.66E+00 WS 51 27681 01/22/96 Fe-59 0.39E+00 2.41E+00 8.79E+00 WS 51 27681 01/22/96 I-131 0.63E+00 2.59E+00 8.88E+00 WS 51 27681 01/22/96 K-40 2.10E+02 1.87E+01 4.53E+01

WS 51 27681 01/22/96 Mn-54 -0.51E+00 0.62E+00 2.20E+00 WS 51 27681 01/22/96 Ru-103 -0.53E+00 0.83E+00 2.95E+00 WS 51 27681 01/22/96 Ru-106 -0.26E+00 6.81E+00 2.46E+01 WS 51 27681 01/22/96 Sb-124 2.03E+00 1.84E+00 6.28E+00 WS 51 27681 01/22/96 Se-75 0.40E+00 0.84E+00 2.71E+00 WS 51 276B1 01/22/96 Th-232 -1.87E+00 2.84E+00 1.02E+01 WS 51 27681 01/22/96 Zn-65 -0.32E+00 1.59E+00 5.71E+00 WS 51 27681 01/22/96 Zr-95 -1.37E+00 1.29E+00 4.62E+00 WS 01 28131 02/27/96 Ag-110M -3.23E+00 1.99E+00 7.96E+00 WS 01 28131 02/27/96 Ba-140 -2.33E+00 1.92E+00 8.44E+00 WS 01 28131 02/27/96 Be-7 -3.89E+00 9.65E+00 3.60E+01

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

i Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE !

CONC. STD DEV. MDC l TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (

_____________________________________________________________________pCi/kg) _________ {

WS 01 28131 02/27/96 Ce-141 1.55E+00 2.03E+00 6.58E+00 WS 01 28131 02/27/96 Ce-144 6.64E+00 7.80E+00 2.51E+01 I WS 01 28131 02/27/96 Co-57 -0.36E+00 0.97E+00 3.24E+00 l WS 01 28131 02/27/96 Co-58 1.15E+00 1.09E+00 3.63E+00 l WS 01 28131 02/27/96 Co-60 -0.54E+00 1.30E+00 5.32E+00 l

WS 01 28131 02/27/96 Cr-51 -1.08E+01 1.22E+01 4.44E+01 1

WS 01 28131 02/27/96 Cs-134 -2.20E+00 1.40E+00 5.56E+00 '

WS 01 28131 02/27/96 Cs-137 -0.27E+00 1.45E+00 5.49E+00 WS 01 28131 02/27/96 Fe-59 -7.07E+00 4.36E+00 1.84E+01 WS 01 28131 02/27/96 I-131 0.25E+00 2.59E+00 9.15E+00 WS 01 28131 02/27/96 K-40 3.14E+02 3.46E+01 WS 6.91E+01

j 01 28131 02/27/96 Mn-54 -0.40E+00 1.30E+00 4.73E+00 WS 01 28131 02/27/96 Ru-103 -3.49E+00 1.36E+00 5.54E+00 i i

l WS 01 28131 02/27/96 Ru-106 -6.22E+00 1.29E+01 4.92E+01 ;

WS 01 28131 02/27/96 Sb-124 0.00E+00 2.76E+00 1.11E+01 l WS 01 28131 02/27/96 Se-75 6.45E-02 1.33E+00 4.50E+00 WS 01 28131 02/27/96 Th-232 1.59E+00 4.79E+00 1.73E+01 '

WS 01 28131 02/27/96 Zn-65 -0.94E+00 3.11E+00 1.17E+01 WS 01 28131 02/27/96 Zr-95 1.10E+00 1.93E+00 6.73E+00 WS 01 28574 03/25/96 Ba-140 -1.26E+00 1.70E+00 6.56E+00 WS 01 28574 03/25/96 Be-7 -9.85E+00 7.15E+00 2.72E+01 WS 01 28574 03/25/96 Ce-141 -2.15E+00 1.61E+00 5.50E+00 WS 01 28574 03/25/96 Ce-144 -8.2BE+00 6.03E+00 2.06E+01 WS 01 28574 03/25/96 Co-57 -1.22E+00 0.77E+00 2.65E+00 WS 01 28574 03/25/96 Co-58 -0.66E+00 0.85E+00 3.14E+00 WS 01 28574 03/25/96 Co-60 -0.63E+00 0.98E+00 3.85E+00 WS 01 28574 03/25/96 Cr-51 3.48E+00 9.05E+00 3.12E+01 WS 01 28574 03/25/96 Cs-134 -1.02E+00 0.94E+00 3.60E+00 WS 01 28574 03/25/96 Cs-137 0.38E+00 1.00E+00 3.63E+00 WS 01 28574 03/25/96 Fe-59 1.37E+00 2.37E+00 8.64E+00 WS 01 28574 03/25/96 I-131 -0.52E+00 1.98E+00 7.07E+00 WS 01 28574 03/25/96 K-40 2.89E+02 2.43E+01 4.96E+01

WS 01 28574 03/25/96 Mn-54 0.74E+00 0.72E+00 2.39E+00 WS 01 28574 03/25/96 Ru-103 -1.53E+00 1.05E+00 3.93E+00 WS 01 28574 03/25/96 Ru-106 0.72E+00 8.36E+00 3.07E+01 WS 01 28574 03/25/96 Sb-124 -0.17E+00 2.02E+00 7.72E+00 WS 01 28574 03/25/96 Se-75 0.17E+00 1.27E+00 4.38E+00 WS 01 28574 03/25/96 Th-232 1.55E+00 3.47E+00 1.22E+01 WS 01 28574 03/25/96 Zn-65 -4.01E+00 1.98E+00 7.97E+00 WS 01 28574 03/25/96 Zr-95 9.57E-02 1.63E+00 5.69E+00 4 i

WS 01 28746 03/25/96 H-3 5.50E+01 2.39E+02 7.79E+02 WS 51 28575 03/25/96 Ag-110M 0.87E+00 1.26E+00 4.37E+00 l WS 51 28575 03/25/96 Ba-140 0.73E+00 1.44E+00 5.20E+00

{ WS 51 28575 03/25/96 Be-7 8.83E+00 7.65E+00 2.57E+01 i

WS 51 28575 03/25/96 Ce-141 -2.26E+00 1.78E+00 5.99E+00 WS 51 28575 03/25/96 Ce-144 -5.62E+00 6.34E+00 2.13E+01 WS 51 28575 03/25/96 Co-57 -0 81E+00 0.81E+00 2.72E+00

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/k

_______________________________________________________________g) (pCi/kg)

WS 51 28575 03/25/96 Co-58 0.39E+00 0.89E+00 3.06E+00 WS 51 28575 03/25/96 Co-60 -0.31E+00 WS 0.90E+00 3.31E+00 51 28575 03/25/96 Cr-51 -2.31E+01 1.01E+01 3.76E+01 WS 51 28575 03/25/96 Cs-134 3.00E+00 2.45E+00 8.94E+00 WS 51 28575 03/25/96 Cs-137 0.77E+00 0.91E+00 3.23E+00 WS 51 28575 03/25/96 Fe-59 -3.05E+00 2.97E+00 1.11E+01 WS 51 28575 03/25/96 I-131 -0.85E+00 2.24E+00 7.93E+00 WS 51 28575 03/25/96 K-40 2.80E+02 2.32E+01 4.60E+01

WS 51 28575 03/25/.96 Mn-54 -0.14E+00 0.95E+00 3.41E+00 WS 51 28575 03/25/96 Ru-103 0.28E+00 1.03E+00 3.60E+00 WS 51 28575 03/25/96 Ru-106 9.17E+00 7.77E+00

' 2.70E+01 WS 51 28575 03/25/96 Sb-124 3.14E+00 2.33E+00 7.97E+00 WS 51 28575 03/25/96 Se-75 -0.73E+00 1.30E+00 4.55E+00 WS ~ 51 28575 03/25/96 Th-232 3.89E+00 3.31E+00 1.11E+01 WS 51 28575 03/25/96 Zn-65 1.59E+00 4.10E+00 1.50E+01 WS 51 28575 03/25/96 Zr-95 -0.63E+00 1.40E+00 5.09E+00 WS 51 28747 03/25/96 H-3 -1.04E+02 2.33E+02 7.82E+02 WS 01 29144 04/25/96 Ag-110M -2.66E+00 2.37E+00 9.97E+00 WS 01 29144 04/25/96 Ba-140 -2.85E+00 2.58E+00 1.14E+01 WS 01 29144 04/25/96 Be-7 -1.11E+01 1.42E+01 5.43E+01 WS 01 29144 04/25/96 Ce-141 2.45E+00 2.36E+00 7.16E+00 WS 01 29144 04/25/96 Ce-144 -0.95E+00 8.07E+00 2.58E+01 WS 01 29144 04/25/96 Co-57 -0.33E+00 1.07E+00 3.44E+00 WS 01 29144 04/25/96 Co-58 0.25E+00 1.28E+00 5.08E+00 WS 01 29144 04/25/96 Co-60 2.44E+00 1.63E+00 5.33E+00 WS 01 29144 04/25/96 Cr-51 -1.45E+01 1.33E+01 4.88E+01 WS 01 29144 04/25/96 Cs-134 -1.20E+00 1.57E+00 6.11E+00 WS 01 29144 04/25/96 Cs-137 0.81E+00 1.45E+00 5.23E+00 WS 01 29144 04/25/96 Fe-59 5.29E+00 4.10E+00 1.39E+01 WS 01 29144 04/25/96 I-131 5.55E+00 3.07E+00 9.51E+00 WS 01 29144 04/25/96 K-40 2.70E+02 3.89E+01 8.00E+01

WS 01 29144 04/25/96 Mn-54 -2.16E+00 1.62E+00 6.89E+00 WS 01 29144 04/25/96 Ru-103 -1.44E+00 1.56E+00 6.12E+00 WS 01 29144 04/25/96 Ru-106 -9.99E+00 1.29E+01 5.12E+01 WS 01 29144 04/25/96 Sb-124 4.82E+00 3.77E+00 1.25E+01 WS 01 29144 04/25/96 Se-75 -0.71E+00 1.85E+00 6.43E+00 WS 01 29144 04/25/96 Th-232 4.35E+00 6.95E+00 2.41E+01 WS 01 29144 04/25/96 Zn-65 -2.84E+00 3.88E+00 1.55E+01 WS 01 29144 04/25/96 Zr-95 1.70E+00 2.93E+00 1.09E+01 WS 51 29145 04/25/96 Ag-110M -0.98E+00 1.10E+00 4.27E+00 WS 51 29145 04/25/96 Ba-140 1.06E+00 1.64E+00 5.75E+00 WS 51 29145 04/25/96 Be-7 7.68E+00 8.48E+00 2.90E+01 WS 51 29145 04/25/96 Ce.141 3.17E+00 1.67E+00 5.20E+00 WS 51 29145 04/25/96 Ce-144 -0.97E+00 6.55E+00 2.19E+01 WS 51 29145 04/25/96 Co-57 1.10E+00 0.84E+00 2.66E+00 WS 51 29145 04/25/96 Co-58 -1.52E+00 0.95E+00 3.73E+00 WS 51 29145 04/25/96 Co-60 1.02E+00 1.03E+00 3.65E+00 WS 51 29145 04/25/96 Cr-51 2.09E+01 9.47E+00 3.02E+01

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996) !

SAMPLE CONC. !

TYPE STA.

STD DEV. MDC LSN END DATE NUCLIDE (pCi/kg) (

____________________________________________._____________pCi/kg) (pCi/kg)

WS 51 29145 04/25/96 Cs-134 1.94E+00 1.06E+00 3.54E+00 WS 51 29145 04/25/96 Cs-137 0.50E+00 0.94E+00 3.44E+00 WS 51 29145 04/25/96 Fe-59 2.44E+00 3.04E+00 1.09E+01 WS 51 29145 04/25/96 I-131 1.44E+00 2.06E+00 7.11E+00 '

WS 51 29145 04/25/96 K-40 2.66E+02 2.68E+01 5.79E+01

WS 51 29145 04/25/96 Mn-54 0.32E+00 0.93E+00 3.24E+00 WS 51 29145 04/25/96 Ru-103 -2.90E+00 1.08E+00 4.38E+00 !

WS 51 29145 04/25/96 Ru-106 -2.85E+00 8.95E+00 3.42E+01 I WS 51 29145 04/25/96 Sb-124 -0.97E+00 1.95E+00 WS 8.12E+00 51 29145 04/25/96 Se-75 1.82E+00 1.11E+00 3.50E+00 WS 51 29145 04/25/96 Th-232 2.07E+00 3.54E+00 1.23E+01 WS 51 29145 04/25/96 Zn-65 -1.60E+00 WS 2.17E+00 8-39E+00 51 29145 04/25/96 Zr-95 0.65E+00 1.51E+00 5.62E+00 WS 01 29621 05/29/96 Ag-110M -2.12E+00 1.17E+00 4.58E+00

WS 01 29621 05/29/96 Ba-140 -0.33E+00 1.75E+00 6.50E+00 WS 01 29621 05/29/96 Be-7 -1.38E+00 7.92E+00 2.81E+01 l WS 01 29621 05/29/96 Ce-141 -5.22E+00 1.83E+00 6.40E+00 WS 01 29621 05/29/96 Ce-144 -3.16E+00 5.60E+00 1.87E+01 WS 01 29621 05/29/96 Co-57 0.68E+00 0.77E+00 2.47E+00 WS 01 29621 05/29/96 Co-58 -0.21E+00 0.86E+00 3.05E+00 WS 01 29621 05/29/96 Co-60 -0.43E+00 0.77E+00 2.92E+00 l WS 01 29621 05/29/96 Cr-51 1.30E+00 9.08E+00 3.15E+01 !

WS 01 29621 05/29/96 Cs-134 1.49E+00 1 52E+00 4.42E+00 WS 01 29621 05/29/96 Cs-137 -0.26E+00 0.82E+00 3.09E+00 WS 01 29621 05/29/96 Fe-59 -1.66E+00 2.34E+00 8.79E+00 WS 01 29621 05/29/96 I-131 3.50E+00 2.38E+00 7.87E+00 WS 01 29621 05/29/96 K-40 2.48E+02 2.19E+01 4.74E+01

WS 01 29621 05/29/96 Mn-54 0.37E+00 0.77E+00 WS 2.70E+00 01 29621 05/29/96 Ru-103 -1.58E+00 0.91E+00 3.48E+00 l WS 01 29621 05/29/96 Ru-106 0.87E+00 7.40E+00 2.72E+01 i WS 01 29621 05/29/96 Sb-124 1.36E+00 1.80E+00 6.41E+00 WS 01 29621 05/29/96 Se-75 -1.05E+00 1.20E+00 4.25E+00 WS 01 29621 05/29/96 Th-232 2.05E+00 3.28E+00 WS 1.14E+01 01 29621 05/29/96 Zn-65 -1.33E+00 1.88E+00 7.05E+00 WS 01 29621 05/29/96 Zr-95 -2.55E+00 1.42E+00 5.44E+00 WS 51 29622 05/29/96 Ag-110M 2.37E+00 1.50E+00 4.77E+00 WS 51 29622 05/29/96 Ba-140 -0.61E+00 1.99E+00 7.67E+00 WS 51 29622 05/29/96 Be-7 -4.75E+00 8.96E+00 3.29E+01 WS 51 29622 05/29/96 Ce-141 -4.38E+00 1.80E+00 6.31E+00 WS 51 29622 05/29/96 Ce-144 -1.64E+01 6.14E+00 2.16E+01 WS 51 29622 05/29/96 Co-57 -2.19E-02 0.80E+00 2.63E+00 WS 51 29622 05/29/96 Co-58 -1.83E+00 1.06E+00 4.16E+00 WS 51 29622 05/29/96 Co-60 -0.20E+00 1.09E+00 4.16E+00 WS 51 29622 05/29/96 Cr-51 -2.12E+01 1.13E+01 4.20E+01 WS 51 29622 05/29/96 Cs-134 1.27E+00 1.30E+00 4.22E+00 WS 51 29622 05/29/96 Cs-137 -2.15E+00 1.19E+DO 4.77E+00 WS 51 29622 05/29/96 Fe-59 3.93E+00 2.85E+00 9.53E+00 WS 51 29622 05/29/96 I-131 2.71E+00 2.71E+00 9.17E+00 WS 51 29622 05/29/96 K-40 2.38E+02 2.59E+01 5.39E+01 *

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

i

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV.

TYPE MDC STA. LSN END DATE NUCLIDE (pCi/kg)

(pCi/kg) pCi/kg)

(

WS 51 29622 05/29/96 Mn-54 1.25E+00 0.93E+00 3.01E+00 WS 51 29622 05/29/96 Ru-103 -2.80E+00 1.10E+00 4.42E+00 WS 51 29622 05/29/96 Ru-106 -1.02E+01 9.21E+00 3.64E+01 WS 51 29622 05/29/96 Sb-124 1.66E+00 2.61E+00 9.29E+00 WS 51 29622 05/29/96 Se-75 -0.17E+00 1.18E+00 3.98E+00 WS 51 29622 05/29/96 Th-232 0.84E+00 4.15E+00 1.45E+01 WS 51 29622 05/29/96 Zn-65 -3.03E+00 2.35E+00 9.35E+00 WS 51 29622 05/29/96 Zr-95 2.31E+00 1.83E+00 6.37E+00 WS 01 30324 06/27/96 Ag-110M -0.51E+00 1.39E+00 4.77E+00 WS 01 30324 06/27/96 Ba-140 -3.87E+00 2.09E+00 WS 8.80E+00 01 30324 06/27/96 Be-7 -2.72E+00 8.13E+00 2.84E+01 WS 01 30324 06/27/96 Ce-141 0.86E+00 2.02E+00 1.58E+00 WS 01 30324 06/27/96 Ce-144 0.17E+00 6.75E+00 1.95E+01 WS 01 30324 06/27/96 Co-57 0.25E+00 0.83E+00 2.37E+00 WS 01 30324 06/27/96 Co-58 0.24E+00 1.11E+00 3.62E+00 WS 01 30324 06/27/96 Co-60 3.09E-02 0.95E+00 3.60E+00 WS 01 30324 06/27/96 Cr-51 8.40E+00 1.05E+01 3.32E+01 WS 01 30324 06/27/96 Cs-134 0.97E+00 1.11E+00 3.83E+00 WS 01 30324 06/27/96 Cs-137 -1.01E+00 1.03E+00 4.12E+00 i WS 01 30324 06/27/96 Fe-59 0.59E+00 3.41E+00 1.22E+01 l WS 01 30324 06/27/96 I-131 -2.14E+00 2.95E+00 1.01E+01 WS 01 30324 06/27/96 K-40 2.58E+02 3.31E+01 2.12E+01

WS 01 30324 06/27/96 Mn-54 0.35E+00 1.02E+00 3.29E+00 WS 01 30324 06/27/96 Ru-103 -1.34E+00 1.17E+00 4.20E+00 WS 01 30324 06/27/96 Ru-106 9.95E+00 1.02E+01 3.49E+01 WS 01 30324 06/27/96 Sb-124 3.78E+00 3.33E+00 1.05E+01 WS 01 30324 06/27/96 Se-75 0.95E+00 1.42E+00 4.48E+00 WS 01 30324 06/27/96 Th-232 -3.30E+00 3.81E+00 4.34E+00 WS 01 30324 06/27/96 Zn-65 -3.72E+00 2.16E+00 8.90E+00 WS 01 30324 06/27/96 Zr a5 -0.74E+00 2.03E+00 6.85E+00 WS 01 30507 06/27/96 H-3 -1.37E+02 2.23E+02 7.51F+02 WS 51 30325 06/27/96 Ag-110M -7.94E-02 1.40E+00 4.88E+00 WS 51 30325 06/27/96 Ba-140 0.65E+00 3.09E+00 1.07E+01 WS 51 30325 06/27/96 Be-7 -1.52E+00 1.12E+01 3.80E+01 WS 51 30325 06/27/96 Ce-141 0.48E+00 1.88E+00 5.44E+00 WS 51 30325 06/27/96 Ce-144 2.93E+00 6.94E+00 1.98E+01 WS 51 30325 06/27/96 Co-57 1.10E+00 0.93E+00 2.59E+00 WS 51 30325 06/27/96 Co-58 1.48E+00 1.14E+00 3.42E+00 WS 51 30325 06/27/96 Co-60 -0.31E+00 1.74E+00 6.67E+00 WS 51 30325 06/27/96 Cr-51 -5.91E+00 1.18E+01 4.02E+01 WS 51 30325 06/27/96 Cs-134 0.00E+00 1.24E+00 4.55E+00 WS 51 30325 06/27/96 Cs-137 -1.65E+00 1.43E+00 5.64E+00 WS 51 30325 06/27/96 Fe-59 3.31E+00 3.35E+00 1.12E+01 WS 51 30325 06/27/96 I-131 4.81E+00 3.49E+00 1.07E+01 WS 51 30325 06/27/96 K-40 2.61E+02 3.52E+01 2.24E+01

WS 51 30325 06/27/96 Mn-54 1.26E+00 1.21E+00 3.70E+00 WS 51 30325 06/27/96 Ru-103 -1.04E+00 1.46E+00 5.11E+00 WS 51 30325 06/27/96 Ru-106 0.00E+00 9.87E+00 3.72E+01

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC l TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg)

_____________________________________________________________________pCi/kg) (

WS 51 30325 06/27/96 Sb-124 0.00E+00 3.69E+00 1.39E+01 WS 51 30325 06/27/96 Se-75 2.51E+00 1.62E+00 4.90E+00 i WS 51 30325 06/27/96 Th-232 -1.65E+00 4.96E+00 5.51E+00 WS 51 30325 06/27/96 Zn-65 0.69E+00 3.05E+00 1.07E+01 j WS 51 30325 06/27/96 Zr-95 0.81E+00 2.35E+00 7.59E+00 '

WS 51 30508 06/27/96 H-3 -1.78E+02 2.23E+02 7.60E+02 )

WS 01 30887 07/25/96 Ag-110M -2.10E+00 0.91E+00 3.61E+00 I WS 01 30887 07/25/96 Ba-140 1.11E+00 1.59E+00 5.39E+00 WS 01 30887 07/25/96 Be-7 9.32E+00 6.31E+00 2.00E+01 WS 01 30887 07/2D/96 Ce-141 0.43E+00 1.39E+00 4.36E+00 WS 01 30887 07/25/96 Ce-144 7.75E+00 4.46E+00 1.31E+01 WS 01 30887 07/25/96 Co-57 -0.33E+00 0.63E+00 1.99E+00 WS 01 30887 07/25/96 Co-58 2.64E-02 0.74E+00 2.52E+00 WS 01 30887 07/25/96 Co-60 0.61E+00 0.67E+00 2.27E+00 i

WS 01 30887 07/25/96 Cr-51 0.69E+00 8.14E+00 2.73E+01 WS 01 30887 07/25/96 Cs-134 -9.71E-02 0.70E+00 2.36E+00 WS 01 30887 07/25/96 Cs-137 1.03E+00 0.72E+00 2.39E+00 WS 01 30887 07/25/96 Fe-59 2.13E+00 2.01E+00 6.71E+00 WS 01 30887 07/25/96 I-131 2.28E+00 2.28E+00 7.38E+00 WS 01 30887 07/25/96 K-40 2.66E+02 2.30E+01 5.00E+01

WS 01 30887 '7/25/96 Mn-54 -0.82E+00 0.66E+00 2.45E+00 WS 01 30887 07/25/96 Ru-103 -1.47E+00 0.77E+00 2.93E+00 WS 01 30887 07/25/96 Ru-106 3.20E+00 6.78E+00 2.39E+01 WS 01 30887 07/25/96 Sb-124 -0.56E+00 1.45E+00 5.70E+00 WS 01 30887 07/25/96 Se-75 0.99E+00 0.97E+00 3.14E+00 WS 01 30887 07/25/96 Th-232 -1.35E+00 2.83E+00 1.01E+01 WS 01 30887 07/25/96 Zn-65 2.26E+00 1.56E+00 5.03E+00 WS 01 30887 07/25/96 Zr-95 -0.60E+00 1.27E+00 4.49E+00 I WS 51 30888 07/29/96 Ag-110M 0.93E+00 1.10E+00 3.63E+00 WS 51 30888 07/29/96 Ba-140 1.19E+00 1.37E+00 4.68E+00 WS 51 30888 07/29/96 Be-7 -5.73E+00 8.28E+00 2.99E+01 WS 51 30888 07/29/96 Ce-141 3.69E+00 1.67E+00 4.83E+00 WS 51 30888 07/29/96 Ce-144 7.97E+00 5.96E+00 1.79E+01 WS 51 30888 07/29/96 Co-57 1.77E+00 0.85E+00 2.46E+00 WS 51 30888 07/29/96 Co-58 0.46E+00 0.89E+00 3.02E+00 l

WS 51 30888 07/29/96 Co-60 -0.41E+00 0.92E+00 3.60E+00 WS 51 30888 07/29/96 Cr-51 0.95E+00 9.10E+00 3.09E+01 WS 51 30888 07/29/96 Cs-134 0.82E+00 1.01E+00 3.14E+00 WS 51 30888 07/29/96 Cs-137 -0.56E+00 0.91E+00 3.53E+00 WS 51 30888 07/29/96 Fe-59 -3.14E+00 2.95E+00 1.16E+01 WS 53 30888 07/29/96 I-131 -1.29E+00 1.96E+00 6.97E+00 WS 51 30888 07/29/96 K-40 2.56E+02 2.73E+01 5.77E+01

WS 51 30888 07/29/96 Mn-54 0.33E+00 0.81E+00 2.76E+00 t WS 51 30888 07/29/96 Ru-103 -8.73E-02 0.91E+00 3.23E+00 WS 51 30888 07/29/96 Ru-106 8.37E+00 8.70E+00 2.99E+01 WS 51 30888 07/29/96 Sb-124 1.25E+00 2.31E+00 8.13E+00 i WS 51 30888 07/29/96 Se-75 -0.80E+00 1.27E+00 4.39E+00 l WS 51 30888 07/29/96 Th-232 -2.70E+00 3.49E+00 1.29E+01

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

I Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (Jar.uary - December 1996) l SAMPLE CONC. STD DEV. MDC )

TYPE STA. LSN END DATE NUCLIDE

............................._ .............-........................pCi/kg)

(pCi/kg) (pCi/kg) (

WS 51 30888 07/29/96 Zn-65 -3.40E+00 2.21E+00 8.78E+00 !

WS 51 30888 07/29/96 Zr-95 0.79E+00 1.55E+00 5.22E+00 l WS 01 31236 08/27/96 Ag-110M 1.45E+00 1.15E+00 3.64E+00 !

WS 01 31236 08/27/96 Ba-140 -1.64E+00 1.48E+00 5.96E+00 f WS 01 31236 08/27/96 Be-7 8.22E+00 8.90E+00 2.91E+01 !

WS 01 31236 08/27/96 Ce-141 -1.17E+00 1.58E+00 5.09E+00 WS 01 31236 08/27/96 Ce-144 -2.44E+00 6.13E+00 1.95E+01 31236 08/27/96 WS 01 Co-57 0.35E+00 0.78E+00 2.42E+00 l WS 01 31236 08/27/96 Co-58 -0.35E+00 0.84E+00 3.02E+00 l WS 01 31236 08/27/96 Co-60 0.88E+00 0.75E+00 2.50E+00 WS Ol' 31236 08/27/96 Cr-51 -1.45E+00 9.91E+00 3.36E+01 WS 01 31236 08/27/96 Cs-134 0.68E+00 0.82E+00 2.66E+00 WS 01 31236 08/27/96 Cs-137 0.51E+00 0.86E+00 3.05E+00 WS 01 31236 08/27/96 Fe-59 -1.51E+00 2.51E+00 9.67E+00 WS 01 31236 08/27/96 I-131 -2.66E+00 2.09E+00 7.57E+00 WS 01 31236 08/27/96 K-40 3.01E+02 2.81E+01 5.91E+01

WS 01 31236 08/27/96 Mn-54 -1.04E+00 0.87E+00 3.22E+00 '

WS 01 31236 08/27/96 Ru-103 -1.57E+00 0.90F+00 3.46E+00 WS 01 31236 08/27/96 Ru-106 9.70E+00 7.99E+00 2.70E+01 1

l WS 01 31236 08/27/96 Sb-124 1.20E+00 1.67E+00 5.89E+00 ;

i WS 01 31236 08/27/96 Se-75 -2.11E+00 1.20E+00 4.31E+00 l WS 01 31236 08/27/96 Th-232 8.26E+00 2.78E+00 7.19E+00 -

WS 01 31236 08/27/96 Zn-65 6.63E+00 4.90E+00 1.88E+01 WS 01 31236 08/27/96 Zr-95 -1.0BE+00 1.52E+00 5.52E+00 WS 51 31238 08/27/96 Ag-110M 0.80E+00 1,37E+00 4.61E+00 WS 51 31238 08/27/96 Ba-140 -1.83E+00 1.98E+00 7.97E+00 ;

WS 51 31238 08/27/96 Be-7 2.69E+00 8.96E+00 3.07E+01 l

WS 51 31238 08/27/96 Ce-141 -1.58E+00 1.73E+00 5.63E+00 i l

WS 51 31238 08/27/96 Ce-144 -0.57E+00 5.99E+00 1.89E+01 WS 51 31238 08/27/96 Co-57 0.45E+00 0.79E+00 2.42E+00 l

[ WS 51 31238 08/27/96 Co-58 4.50E-02 1.04E+00 3.63E+00 ,

i WS 51 31238 08/27/96 Co-60 0.79E+00 1.08E+00 3.80E+00 '

i WS 51 31238 08/27/96 Cr-51 9.87E+00 1.00E+01 3.26E+01 i WS 51 31238 08/27/96 Cs-134 0.44E+00 0.80E+00 2.56E+00 ,

l WS 51 31238 08/27/96 Cs-137 1.93E+00 1.04E+00 3.34E+00 l

WS 51 31238 08/27/96 Fe-59 4.67E+00 3.13E+00 1.00E+01 j WS 51 31238 08/27/96 I-131 -0.51E+00 2.15E+00 7.51E+00 l l WS 51 31238 08/27/96 K-40 3.51E+02 3.38E+01 6.43E+01 *

! WS 51 31238 08/27/96 Mn-54 -0.59E+00 1.02E+00 3.70E+00 WS 51 31238 08/27/96 Ru-103 -2.65E+00 1.03E+00 4.18E+00 WS 51 31238 08/27/96 Ru-106 -4.07E+00 9.29E+00 3.52E+01 :

WS 51 31238 08/27/96 Sb-124 -0.81E+00 2.96E+00 1.13E+01 WS 51 31238 08/27/96 Se-7; -1.44E+00 3.47E+00 5.11E+00 WS 51 31238 08/27/96 Th M? 1.61E+00 4.33E+00 1.49E+01 WS 51 31238 08/27/96 Zn m .70E+00 2.18E+00 8.88E+00 ;

WS 51 31238 08/27/96 Zr-95 -.48E+00 1.96E+00 6.59E+00

! WS 01 31887 09/26/96 Ag-110M -0.99E+00 1.02E+00 3.93E+00 (

WS 01 31887 09/26/96 Ba-140 -0.21E+00 1.46E+00 5.57E+00 l l

l l

Radioactivity detected (i.e., Concentration > 3 Std. Deviations), i l

_ _ _ _ _ _ _ _ _ . - . _ _ _ _ . . . . __ _. ._ .__ _ = _ _ . _ _ _ _ _ _ _ . _ - _ .,

j Seabrook Nuclear Power Station f Radiological Environmental Monitoring Data !

(January - December 1996) ,

SAMPLE CONC. STD DEV. MDC TYPE STA.

..........................................................................g)....

LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/k ;

WS 01 31887 09/26/96 Be-7 -5.56E+00 7.44E+00 2.72E+01 WS 01 31887 09/26/96 Ce-141 -0.76E+00 1.60E+00 5.21E+00 3

l WS 01 31887 09/26/96 Ce-144 5.66E+00 5.17E+00 1.57E+01 }

i WS 01 31887 09/26/96 Co-57 -1.14E+00 0.74E+00 2.46E+00 4 WS 01 31887 09/26/96 Co-58 0.33E+00 0.81E+00 2.76E+00 WS 01 31887 09/26/96 Co-60 0.37E+00 0.77E+00 2.81E+00 WS 01 31887 09/26/96 Cr-51 -2.82E+00 9.30E+00 3.22E+01 31887 09/26/96 WS 01 Cs-134 -0.44E+00 0.81E+00 2.86E+00 WS 01 31887 09/26/96 Cs-137 l

-0.54E+00 0.80E+00 3.15E+00 WS 01 31887 09/26/96 Fe-59 4.15E+00 2.50E+00 7.84E+00 WS 01 31887 09/26/96 I-131 1.71E+00 2.08E+00 6.88E+00 '

WS 01 31887 09/26/96 K-40 3.37E+02 2.93E+01 5.76E+01

WS 01 31887 09/26/96 Mn-54 l 0.2iE+00 0.71E+00 2.46E+00 WS 01 31887 09/26/96 Ru-103 0.56E+00 1.01E+00 3.42E+00 l i

WS 01 31887 09/26/96 Ru-106 -6.83E+00 7.88E+00 3.06E+01 l WS 01 31887 09/26/96 Sb-124 -1.02E+00 1.80E+00 7.41E+00 l WS 01 31887 09/26/96 Se-75 -1.82E+00 1.14E+00 4.14E+00 US 01 31887 09/26/96 Th-232 -1.32E+00 3.05E+00 1.13E+01 WS 01 31887 09/26/96 Zn-65 -2.09E+00 1.83E+00 7.29E+00 WS 01 31887 09/26/96 Zr-95 -0.58E+00 1.48E+00 5.34E+00 I

WS 01 32515 09/26/96 H-3 -0.18E+00 2.39E+02 7.87E+02 WS 51 31888 09/26/96 Ag-110M 6.21E-02 1.31E+00 4.65E+00 !

WS 51 31888 09/26/96 Ba-140 -1.03E+00 2.66E+00 1.00E+01 WS 51 31888 09/26/96 Be-7 -9.82E+00 9.59E+00 3.52E+01 WS 51 31888 09/26/96 Ce-141 -1.02E+00 1.73E+00 5.54E+00 WS 51 31888 09/26/96 Ce-144 -1.59E+00 6.29E+00 1.99E+01 WS 51 31888 09/26/96 Co-57 1.34E+00 0.78E+00 2.30E+00 WS 51 31888 09/26/96 Co-58 4.65E-02 1.23E+00 4.23E+00 WS 51 31888 09/26/96 Co-60 0.67E+00 1.24E+00 4.38E+00 WS 51 31888 09/26/96 Cr-51 1.02E+01 1.01E+01 3.28E+01 WS 51 31888 09/26/96 Cs-134 6.29E-02 0.82E+00 2.90E+00 WS 51 31888 09/26/96 Cs-137 0.48E+00 1.20E+00 4.26E+00 WS 51 31888 09/26/96 Fe-59 2.20E+00 3.27E+00 1.15E+01 WS 51 31888 09/26/96 I-131 -2.12E+00 , 3.03E+00 1.08E+01 WS 51 31888 09/26/96 K-40 2.72E+02 3.11E+01 6.61E+01

WS 51 31888 09/26/96 Mn-54 0.51E+00 1.15E+00 3.83E+00 WS 51 31888 09/26/96 Ru-103 -2.46E+00 1.23E+00 4.72E+00 WS 51 31888 09/26/96 Ru-106 -5.46E+00 1.02E+01 3.84E+01 WS 51 31888 09/26/96 Sb-124 -0.70E+00 2.58E+00 1.02E+01 WS 51 31888 09/26/96 Se-75 -2.08E+00 1.28E+00 4.62E+00 WS 51 31888 09/26/96 Th-232 3.05E+00 4.25E+00 1.43E+01 WS 51 31888 09/26/96 Zn-65 3.49E+00 2.5BE+00 8.38E+00 WS 51 31888 09/26/96 Zr-95 0.80E+00 2.06E+00 7.44E+00 WS 51 32516 09/26/96 H-3 -1.41E+02 2.34E+02 7.90E+02 l

WS 01 32568 10/28/96 Ag-110M -1.30E+00 1.22E+00 4.59E+00 WS 01 32568 10/28/96 Ba-140 0.20E+00 1.49E+00 5.47E+00 i l

!

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

1

,, . . - _ ~ - -

Seabrook Nuclear Power Stat.on Radiological Environmental Monito: ing Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) lpCi/kg) (pCi/kg)

WS 01 32568 10/28/96 Be-7 -1.55E+01 7.46E+'O 2.94E+01

! WS 01 32568 10/28/96 Ce-141 0.64E+00 1.61E+00 5.01E+00 WS 01 32568 10/28/96 Ce-144 -5.42E+00 6.50E+00 2.10E+01 WS 01 32568 10/28/96 Co-57 -0.56E+00 0.81E+00 2.61E+00 l

WS 01 32568 10/28/96 Co-58 3.82E-02 0.88E+00 3.08E+00 WS 01 32568 10/28/96 Co-60 0.73E+00 0.90E+00 3.11E+00 l WS 01 32568 10/28/96 Cr-51 1.75E+00 9.58E+00 3.24E+01 l

WS 01 32568 10/28/96 Cs-134 8.75E-02 0.75E+00 2.58E+00 l WS 01 32568 10/28/96 Cs-137 0.28E+00 1.04E+00 3.73E+00 32568 10/28/96 WS 01 Fe-59 1.92E+00 2.65E+00 9.19E+00 WS 01 32568 10/28/96 I-131 -0.19E+00 2.08E+00 7.16E+00 WS 01 32568 10/28/96 K-40 3.16E+02 2.85E+01 5.23E+01 *

, WS 01 32568 10/28/96 Mn-54 -0.65E+00 0.85E+00 3.14E+00 WS 01 32568 10/28/96 Ru-103 -0.20E+00 0.99E+00 3.49E+00 WS 01 32568 10/28/96 Ru-106 -3.59E+00 9.34E+00 3.47E+01 WS 01 32568 10/28/96 Sb-124 -1.65E+00 2.26E+00 9.00E+00 WS 01 32568 10/28/96 Se-75 -0.13E+00 1.34E+00 4.52E+00 WS 01 32568 10/28/96 Th-232 3.38E+00 3.35E+00 1.11E+01 WS 01 32568 10/28/96 Zn-65 0.70E+00 1.85E+00 6.62E+00 WS 01 32568 10/28/96 Zr-95 -0.66E+00 1.61E+00 5.77E+00 WS 51 32569 10/28/96 Ag-110M -2.35E+00 1.24E+00 5.08E+00 WS 51 32569 10/28/96 Ba-140 -0.40E+00 1.82E+00 6.87E+00 WS 51 32569 10/28/96 Be-7 7.48E+00 8.34E+00 2.75E+01 WS 51 32569 10/28/96 Ce-141 -1.80E+00 1.83E+00 6.06E+00 WS 51 32569 10/28/96 Ce-144 -4.46E+00 6.58E+00 2.11E+01 WS 51 32569 10/28/96 Co-57 0.94E+00 0.85E+00 2.57E+00 WS 51 32569 10/28/96 Co-58 1.14E+00 0.94E+00 2.97E+00 WS 51 32569 10/28/96 Co-60 1.62E+00 0.91E+00 2.75E+00 WS 51 32569 10/28/96 Cr-51 1.11E+00 1.01E+01 3.42E+01 WS 51 32569 10/28/96 Cs-134 -0.79E+00 0.80E+0L 2.92E+00 WS 51 32569 10/28/96 Cs-137 -1.13E+00 1.02E+00 3.97E+00 WS 51 32569 10/28/96 Fe-59 -2.03E+00 2.87E+00 1.08E+01 WS 55 32569 10/28/96 K-40 2.48E+02 2.63E+01 5.43E+01

WS 51 32569 10/28/96 I-131 -0.80E+00 1.96E+00 6.90E+00 WS 51 32569 10/28/96 Mn-54 0.20E+00 0.77E+00 2.67E+00 WS 51 32569 10/28/96 Ru-103 -2.01E+00 1.09E+00 4.17E+00 WS 51 32569 10/28/96 Ru-106 4.77E+00 9.08E+00 3.21E+01 WS 51 32569 10/28/96 Sb-124 -0.67E+00 1.69E+00 7.14E+00 ;

WS 51 32569 10/28/96 Se-75 -1.06E+00 1.30E+00 4.54E+00 i WS 51 32569 10/28/96 Th-232 -0.27E+00 3.41E+00 1.24E+01 j WS 51 32569 10/28/96 Zn-65 -4.41E+00 2.27E+00 9.15E+00 l WS 51 32569 10/28/96 Zr-95 0.20E+00 1.47E+00 5.12E+00 WS 01 33080 11/21/96 Ag-110M -0.11E+00 0.99E+00 3.45E+00 i

WS 01 33080 11/21/96 Ba-140 -0.60E+00 1.54E+00 5.89E+00 l l WS 01 33080 11/21/96 Be-7 -8.80E+00 7.37E+00 2.68E+01 l WS 01 33080 11/21/96 Ce-141 -2.61E+00 1.47E+00 4.87E+00 l WS 01 33080 11/21/96 Ce-144 4.54E+00 5.26E+00 1.60E+01 l WS 01 33080 11/21/96 Co-57 0.15E+00 0.69E+00 2.14E+00 i

! WS 01 33080 11/21/96 Co-58 -0.32E+00 0.83E+00 2.92E+00 l

l

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

i Seabrook Nuclear Power Station i l Radiological Environmental Monitoring Data (January - December 1996)

I SAMPLE CONC. STD DEV. MDC !

l TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg) i WS 01 33080 11/21/96 Co-60 0.72E+00 0.81E+00 2.74E+00 i WS 01 33080 11/21/96 Cr-51 2.12E+00 9.29E+00 3.10E+01 WS 01 33080 11/21/96 Cs-134 -1.77E+00 0.74E+00 3.09E+00 WS 01 33080 11/21/96 Cs-137 0.71E+00 0.84E+00 2.91E+00 l WS 01 33080 11/21/96 Fe-59 -4.19E+00 2.46E+00 9.94E+00 l WS 01 33080 11/21/96 I-131 0.63E+00 2.67E+00 9.00E+00 l WS 01 33080 11/21/96 E-40 3.24E+02 2.52E+01 4.87E+01

l WS 01 33080 11/21/96 Mn-54 1.05E+00 0.83E+00 2.60E+00 ]

i WS 01 33080 11/21/96 Ru-103 -0.23E+00 0.93E+00 3.25E+00 l WS 01 33080 11/21/96 Ru-106 -5.22E+00 7.07E+00 2.67E+01 l WS 01 33080 11/21/96 Sb-124 0.48E+00 1.66E+00 6.06E+00 WS 01 33080 11/21/96 Se-75 0.47E+00 1.13E+00 3.73E+00 l WS 01 33080 11/21/96 Th-232 1.17E+00 3.07E+00 1.03E+01 WS 01 33080 11/21/96 Zn-65 1.18E+00 1.84E+00 6.28E+00 WS 01 33080 11/21/96 Zr-95 -2.49E+00 1.35E+00 5.19E+00 l l l WS 51 33081 11/27/96 Ag-110M -0.56E+00 1.02E+00 3.77E+00 l 33081 11/27/96 WS 51 Ba-140 -2.29E+00 1.35E+00 5.56E+00 '

j WS 51 33081 11/27/96 Be-7 -B.64E+00 6.59E+00 2.41E+01 l WS 51 33081 11/27/96 Ce-141 -3.59E+00 1.45E+00 4 95E+00 WS 51 33081 11/27/96 Ce-144 1.78E+00 5.43E+00 A.67E+01 WS 51 33081 11/27/96 Co-57 0.40E+00 0.70E+00 2.15E+00 i WS 51 33081 11/27/96 Co-58 -0.48E+00 0.83E+00 2.91E+00 WS 51 33081 11/27/96 Co-60 1.03E+00 0.78E+00 2.51E+00 l WS 51 33081 11/27/96 Cr-51 -1.00E+01 8.65E+00 3.01E+01 {

WS 51 33081 11/27/96 Cs-134 -0.73E+00 0.65E+00 2.35E+00 i i

WS 51 33081 11/27/96 Cs-137 0.30E+00 0.76E+00 2.69E+00

WS 51 33081 11/27/96 Fe-59 -1.71E+00 2.03E+00 7.70E+00 l WS 51 33081 11/27/96 I-131 2.26E+00 1.65E+00 5.24E+00 WS 51 33081 11/27/96 K-40 2.76E+02 2.31E+01 4.65E+01 * '

WS 51 33081 11/27/96 Mn-54 0.3BE+00 0.74E+00 2.46E+00 WS 51 33081 11/27/96 Ru-103 -2.20E+00 0.89E+00 3.41E+00 WS 51 33081 11/27/96 Ru-106 -4.17E+00 7.51E+00 2.77E+01 WS 51 33081 11/27/96 Sb-124 -0.43E+00 1.97E+00 7.41E+00 WS 51 33081 11/27/96 Se-75 -0.94E+00 1.07E+00 3.69E+00 WS 51 33081 11/27/96 Th-232 4.66E400 3.12E+00 1.01E+01 WS 51 33081 11/27/96 Zn-65 -4.91E+00 1 71E+00 7.09E+00 WS 51 33081 11/27/96 Zr-95 1.20E+00 1.32E+00 4.25E+00 WS 01 33523 12/23/96 Ag-110M -2.40E+00 1.20E+00 4.81E+00 WS 01 33523 12/23/96 Ba-140 -1.05E+00 1.96E+00 7.38E+00 WS 01 33523 12/23/96 Be-7 -1.61E+00 8.77E+00 3.07E+01 WS 01 33523 12/23/96 Ce-141 -1.77E+00 1.81E+00 5.88E+00 ;

WS 01 33523 12/23/96 Ce-144 -7.21E+00 6.42E+00 2.10E+01 i WS 01 33523 12/23/96 Co-57 1.14E+00 0.88E+00 2.63E+00 !

WS 01 33523 12/23/96 Co-58 9.62E-02 0.94E+00 3.25E+00 f WS 01 33523 12/23/96 Co-60 -1.17E+00 1.06E+00 4.23E+00 WS 01 33523 12/23/96 Cr-51 1.00E+00 1.01E+01 3.41E+01 WS 01 33523 12/23/96 Cs-134 1.33E+00 2.62E+00 9.84E+00 WS 01 33523 12/23/96 Cs-137 -1.55E+00 1.01E+00 4.04E+00 WS 01 33523 12/23/96 Fe-59 -0.36E+00 2.43E+00 9.25E+00

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l l

._. . . - - - - - . - - . ~ - - - - - - . - - - . - . - . -

i i

Seabrook Nuclear Power Station l Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/kg) (pCi/kg) (pCi/kg) l WS 01 33523 12/23/96 I-13". 4.46E+00 2.50E+00 7.76E+00 WS 01 33523 12/23/96 K-40 2.91E+02 2.83E+01 5.55E+01

WS 01 33523 12/23/96 Mn-56 1.19E+00 0.87E+00 2.70E+00 WS 01 33523 12/23/96 Ru-l')3 -1.86E+00 1.08E+00 4.09E+00 WS 01 33523 12/23/96 Ru-106 -7.20E+00 9.60E+00 3.63E+01 I WS 01 33523 12/23/96 Sb-124 2.99E+00 2.21E+00 7.06E+00 l WS 01 33523 12/23/96 Se-75 -0.43E+00 1.31E+00 4.50E+00 WS 01 33523 12/23/96 Th-232 0.41E+00 3.23E+00 1.14E+01 WS 01 33523 12/23/96 Zn-65 0.91E+00 2.23E+00 7.40E+00 WS 01 33523 12/23/96 Zr-95 -3.03E+00 1.46E+00 5.97E+00 WS 01 33995 12/23/96 H-3 -1.06E+02 2.38E+02 7.98E+02 WS 51 33524 12/23/96 Ag-110M -0.252400 1.34E+00 4.87E+00

! WS 51 33524 12/23/96 Ba-140 -0.38Fr00 1.76E+00 6.73E+00 WS 51 33524 12/23/96 Be-7 9.45E+00 7.95E+00 2.57E+01 !

, WS 51 33524 12/23/96 Ce-141 -1.91E+00 1.94E+00 6.38E+00 I WS 51 33524 12/23/96 Ce-144 1.87E+00 6.50E+00 2.02E+01 WS 51 33524 12/23/96 Co-57 0.48E+00 0.88E+00 2.71E+00 ;

l WS 51 -33524 12/23/96 Co-58 -0.11E+00 0.98E+00 3.43E+00 WS 51 33524 12/23/96 Co-60 -0.3BE+00 0.98E+00 3.65E+00 WS 51 33524 12/23/96 Cr-51 -1.52E+01 9.59E+00 3.51E+01 WS 51 33524 12/23/96 Cs-134 0.74E+00 0.85E+00 2.75E+00 WS 51 33524 12/23/96 Cs-137 -0.96E+00 1.05E+00 4.03E+00 WS 51 33524 12/23/96 Fe-59 -4.9BE+00 2.30E+00 1.01E+01 WS 51 33524 12/23/96 I-131 -1.12E+00 2.25E+00 7.95E+00 l WS 51 33524 12/23/96 I-131 -1.12E+00 2.25E+00 7.95E+00 l WS 51 33524 12/23/96 K-40 2.73E+02 2.79E+01 5.92E+01

WS 51 33524 12/23/96 Mn-54 1.64E+00 0.85E+00 2.51E+00 WS 51 33524 12/23/96 Ru-103 1.19E+00 1.17E+00 3.83E+00 l WS 51 33524 12/23/96 Ru-106 -4.65E+00 9.74E+00 3.61E+01 i WS 51 33524 12/23/96 Sb-124 -0.82E+00 2.43E+00 9.45E+00 l WS 51 33524 12/23/96 Se-75 2.94E+00 1.40E+00 4.32E+00 l WS 51 33524 12/23/96 Th-232 -5.23E+00 3.71E+00 1.44E+01 WS 51 33524 12/23/96 Zn-65 3.65E+00 1.85E+00 5.32E+00 WS 51 33524 12/23/96 Zr-95 -1.18E+00 1.66E+00 6.02E+00 WS 51 33996 12/23/96 H-3 -1.52E+02 2.43E+02 8.21E+02 3'

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

I i

. .. - _ - - -. - . - - ---- - - . .- - . ~ - - -

i l

l I

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data l (January - December 1996) !

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m)

____..__......._____..________________________________(pCi/cu.m) (pCi/cu.m)

Air Particulates AP 01 2B731 03/27/96 Ag-110M ~2.98E-04 3.71E-04 1.64E-03 AP 01 28731 03/27/96 Ba-140 1.74E-03 3.40E-03 1.33E-02 AP 01 28731 03/27/96 Be-7 9.56E-02 1.00E-02 2.06E-02

AP 01 28731 03/27/96 Ce-141 -1.14E-04 5.71E-04 1.93E-03 AP 01 28731 03/27/96 Ce-144 -5.42E-04 9.08E-04 3.15E-03 AP 01 28731 03/27/96 Co-57 -1.79E-04 1.20E-04 4.33E-04 AP 01 28731 03/27/96 Co-58 7.85E-05 5.38E-04 2.13E-03 AP 01 28731 03/27/96 Co-60 2.11E-04 3.34E-04 1.31E-03 AP 01 28731 03/27/96 Cr-51 2.86E-03 5.33E-03 1.85E-02 l AP 01 28731 03/27/96 Cs-134 2.15E-04 AP 2.84E-04 1.01E-03 01 28731 03/27/96 Cs-137 0.00E+00 2.40E-04 9.64E-04 AP 01 28731 03/27/96 Fe-59 -2.21E-03 1.91E-03 9.13E-03 i

i AP 01 28731 03/27/96 I-131 3.32E-03 4.95E-03 1.71E-02 '

AP 01 28731 03/27/96 K-40 5.03E-03 3.52E-03 1.14E-02 AP 01 28731 03/27/96 Mn-54 1.58E-04 3.07E-04 1.12E-03 AP 01 28731 03/27/96 Ru-103 1.55E-04 5.89E-04 2.21E-03 AP 01 28731 03/27/96 Ru-106 -2.16E-04 2.50E-03 9.88E-03 j AP 01 28731 03/27/96 Sb-124 3.34E-04 1.30E-03 5.52E-03

-AP 01 28731 03/27/96 Se-75 -1.67E-05 3.26E-04 1.16E-03 AP 01 28731 03/27/96 Th-232 8.53E-04 1.28E-03 4.53E-03 AP 01 28731 03/27/96 Zn-65 -5.32E-04 7.66E-04 3.34E-03 AP 01 28731 03/27/96 Zr-95 7.34E-04 6.93E-04 2.52E-03 l AP 02 28732 03/27/96 Ag-110M 4.88E-06 3.92E-04 1.56E-03 AP 02 28732 03/27/96 Ba-140 3.96E-04 3.08E-03 1.32E-02 AP 02 28732 03/27/96 Be-7 9.10E-02 9.86E-03 1.87E-02

AP 02 28732 03/27/96 Ce-141 -2.17E-04 5.47E-04 1.88E-03 AP 02 28732 03/27/96 Ce-144 -2.88E-04 8.97E-04 3.06E-03 AP 02 28732 03/27/96 Co-57 -2.76E-05 1.12E-04 3.81E-04 l AP 02 28732 03/27/96 Co-58 -5.79E-04 3.69E-04 1.85E-03 i AP 02 28732 03/27/96 Co-60 8.42E-05 2.64E-04 1.14E-03 i

AP 02 28732 03/27/96 Cr-51 1.01E-02 6.31E-03 1.98E-02 AP 02 28732 03/27/96 Cs-134 -2.11E-04 2.24E-04 9.58E-04 AP 02 28732 03/27/96 Cs-137 1.63E-04 2.92E-04 1.07E-03

) AP 02 28732 03/27/96 Fe-59 -2.75E-03 1.79E-03 8.99E-03 AP 02 28732 03/27/96 I-131 2.62E-03 5.92E-03 2.05E-02 AP 02 28732 03/27/96 K-40 -6.79E-04 4.56E-03 1.82E-02 AP 02 28732 03/27/96 Mn-54 -1.49E-04 2.79E-04 1.16E-03

! AP 02 28732 03/27/96 Ru-103 -8.17E-04 5.83E-04 2.49E-03 AP 02 28732 03/27/96 Ru-106 -4.68E-03 2.82E-03 1.23E-02 AP 02 28732 03/27/96 Sb-124 -2.74E-03 1.65E-03 8.23E-03 AP 02 28732 03/27/96 Se-75 1.64E-04 3.23E-04 1.11E-03 AP 02 28732 03/27/96 Th-232 -2.24E-03 9.74E-04 4.71E-03 AP 02 28732 03/27/96 Zn-65 4.14E-04 5.26E-04 2.00E-03 AP 02 28732 03/27/96 Zr-95 4.10E-04 4.19E-04 1.59E-03 AP 03 28733 03/27/96 Ag-110M 1.26E-04 3.66E-04 1.43E-03 AP 03 28733 03/27/96 Ba-140 4.84E-03 3.62E-03 1.18E-02 l AP 03 28733 03/27/96 Be-7 0.11E+00 1.14E-02 2.34E-02

i

!

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

_ . _ _ _ _ _ ._ _ _ __ _ _ _ _ . _ _ . __ _ _.~._ ___ _ ___ ._ _.. _ _ _ _ _ _ _ _ _ _ _ .

t Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC.

TYPE STD DEV. MDC STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m

......--.........-----.--...............................)_.(pCi/cu.m) ......__.-

AP 03 28733 03/27/96 Ce-141 1.17E-04 6.54E-04 2.14E-03 AP 03 28733 03/27/96 Ce-144 -3.76E-04 9.82E-04 3.35E-03 AP 03 28733 03/27/96 Co-57 -1.18E-05 1.26E-04 4.21E-04 AP 03 28733 03/27/96 Co-58 1.45E-04 4.62E-04 1.85E-03 AP 03 28733 03/27/96 Co-60 AP

-2.11E-04 4.27E-04 1.87E-03 03 28733 03/27/96 Cr-51 -3.40E-03 5.61E-03 2.13E-02 AP 03 28733 03/27/96 Cs-134 -2.27E-04 3.20E-04 1.33E-03 AP 03 28733 03/27/96 Cs-137 -9.02E-05 2.07E-04 9.10E-04 AP 03 28733 03/27/96 Fe-59 5.90E-04 1.92E-03 7.85E-03 AP 03 28733 03/27/96 I-131 4.26E-03 5.98E-03 2.04E-02 AP 03 28733 03/27/96 K-40 -1.78E-03 5.28E-03 2.11E-02 AP 03 28733 03/27/96 Mn-54 3.04E-04 3.28E-04 1.14E-03 AP 03 28733 03/27/96 Ru-103 -5.01E-04 6.14E-04 2.52E-03 AP 03 28733 03/27/96 Ru-106 1.23E-03 2.88E-03 1.07E-02 AP 03 28733 03/27/96 Sb-124 5.88E-04 1.32E-03 5.46E-03 AP 03 28733 03/27/96 Se-75 7.93E-04 3.44E-04 1.01E-03 AP 03 28733 03/27/96 Th-232 -1.13E-03 1.24E-03 5.16E-03 AP 03 28733 03/27/96 Zn-65 -8.91E-04 9.68E-04 4.13E-03 AP 03 28733 03/27/96 Zr-95 5.54E-04 8.95E-04 3.41E-03 l

AP 04 28734 03/27/96 Ag-110M -1.95E-04 4.26E-04 1.73E-03 AP 04 28734 03/27/96 Ba-140 3.75E-03 3.31E-03 1.14E-02 l AP 04 28734 03/27/96 Be-7 0.11E+00 1.01E-02 1.78E-02

AP 04 28734 03/27/96 Ce-141 3.62E-04 5.13E-04 1.64E-03 l

AP 04 28734 03/27/96 Ce-144 1.33E-03 9.38E-04 2.82E-03 AP 04 28734 03/27/96 Co-57 2.10E-05 1.06E-04 3.51E-04 AP 04 28734 03/27/96 Co-58 -1.84E-05 4.61E-04 1.88E-03 AP 04 28734 03/27/96 Co-60 2.40E-04 2.61E-04 9.85E-04 AP 04 28734 03/27/96 Cr-51 -7.39E-03 5.44E-03 2.13E-02 AP 04 28734 03/27/96 Cs-134 1.00E-04 4.14E-04 1.46E-03 i AP 04 28734 03/27/96 Cs-137 1.80E-04 2.47E-04 9.00E-04 l AP 04 28734 03/27/96 Fe-59 1.49E-03 1.72E-03 6.43E-03 i AP 04 28734 03/27/96 I-131 -1.11E-03 4.73E-03 1.77E-02 AP 04 28734 03/27/96 K-40 -1.16E-03 3.56E-03 1.51E-02 AP 04 28734 03/27/96 Mn-54 3.78E-04 3.29E-04 1.10E-03 AP 04 28734 03/27/96 Ru-103 3.38E-04 5.98E-04 2.16E-03 AP 04 28734 03/27/96 Ru-106 7.63E-04 2.35E-03 8.91E-03 AP 04 28734 03/27/96 Sb-124 -3.13E-04 1.12E-03 5.33E-03 AP 04 28734 03/27/96 Se-75 -3.72E-04 3.33E-04 1.25E-03 AP 04 28734 03/27/96 Th-232 2.87E-04 1.14E-03 4.23E-03 l

AP 04 28734 03/27/96 Zn-65 1.88E-04 7.33E-04 2.88E-03 AP 04 28734 03/27/96 Zr-95 3.58E-04 8.62E-04 3.33E-03 AP 05 28735 03/27/96 Ag-110M 2.35E-04 4.58E-04 1.67E-03 AP 05 28735 03/27/96 Ba-140 -3.45E-03 2.73E-03 1.47E-02 AP 05 28735 03/27/96 Be-7 0.12E+00 1.06E-02 1.73E-02

AP 05 28735 03/27/96 Ce-141 5.44E-04 5.90E-04 1.84E-03 AP 05 28735 03/27/96 Ce-144 -1.23E-03 8.66E-04 3.17E-03 AP 05 28735 03/27/96 Co-57 6.09E-05 1.13E-04 3.63E-04 AP 05 28735 03/27/96 Co-58 3.87E-05 3.76E-04 1.58E-03 AP 05 28735 03/27/96 Co-60 -1.98E-04 4.01E-04 1.75E-03 l

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. I TYPE STD DEV. MDC STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m) (

____________________ .__________________________..__________________pCi/cu.m) __________

AP 05 28735 03/27/96 Cr-51 -1.74E-03 5.73E-03 2.10E-02 AP 05 28735 03/27/96 Cs-134 2.65E-04 2.06E-04 6.96E-04 AP 05 28735 03/27/96 Cs-137 -5.60E-04 2.60E-04 1.23E-03 AP 05 28735 03/27/96 Fe-59 2.76E-03 1.79E-03 5.86E-03 l AP 05 28735 03/27/96 -9.92E-03 I-131 5.12E-03 2.15E-02 t AP 05 28735 03/27/96 K-40 -5.12E-03 4.27E-03 1.90E-02 AP 05 28735 03/27/96 Mn-54 6.62E-05 2.29E-04 9.02E-04 AP 05 28735 03/27/96 Ru-103 -7.01E-04 5.48E-04 2.35E-03 AP 05 28735 03/27/96 Ru-106 -2.88E-03 2.08E-03 9.60E-03 AP 05 28735 03/27/96 Sb-124 1.15E-03 1.34E-03 5.01E-03 '

AP 05 28735 03/27/96 Se-75 -3.30E-04 3.21E-04 1.22E-03 AP 05 28735 03/27/96 Th-232 -1.11E-03 9.09E-04 4.14E-03 AP 05 28735 03/27/96 Zn-65 2.95E.04 6.99E-04 2.73E-03 AP 05 28735 03/27/96 Zr-95 -1.65E-13 9.72E-04 4.42E-03 AP 06 28736 03/27/96 Ag-110M 1.52E-05 4.69E-04 1.81E-03 AP 06 28736 03/27/96 Ba-140 -6.0bF-03 3.33E-03 1.78E-02 ,

AP 06 28736 03/27/96 9.cCE-02 Be-7 1.02E-02 2.10E-02

AP 06 28736 03/27/96 Ce-141 5.r>E-04 5.79E-04 1.70E-03 :

AP 06 28736 03/27/96 Ce-144 3. 4E-04 9.47E-04 3.08E-03 i AP 06 28736 03/27/96 Co-57 -6.86E-05 1.16E-04 4.03E-04 AP 06 28736 03/27/96 Co-58 5.02E-04

-2.00E-05 2.05E-03 AP 06 28736 03/27/96 Co-60 -1.75E-04 3.31E-04 1.53E-03 AP 06 28736 03/27/96 Cr-51 -6.06E-03 6.07E-03 2.32E-02 AP 06 28736 03/27/96 Cs-134 2.19E-04 3.79E-04 1.29E-03 AP 06 28736 03/27/96 Cs-137 0.00E+00 2.93E-04 1.14E-03 AP 06 28736 03/27/96 Fe-f9 1.46E-03 1.35E-03 5.53E-03 AP 06 28736 03/27/96 I-131 5.07E-03

-2.53E-03 1.95E-02 AP 06 28736 03/27/96 K-40 3.76E-03 4.79E-03 1.72E-02 AP 06 28736 03/27/96 Mn-54 -6.03E-05 3.18E-04 1.25E-03 AP 06 28736 03/27/96 Ru-103 6.15E-04 2.53E-04 2.27E-03 AP 06 28736 03/27/96 Ru-106 -2.97E-03 2.72E-03 1.16E-02 AP 06 28736 03/27/96 Sb-124 -5.68E-04 9.83E-04 5.27E-03 AP 06 28736 03/27/96 Se-75 2.55E-04 3.64E-04 1.22E-03 AP 06 28736 03/27/96 Th-232 3.83E-04 8.93E-04 3.44E-03 AP 06 28736 03/27/96 Zn-65 1.10E-03

-1.49E-03 4.68E-03 AP 06 28736 03/27/96 Zr-95 8.29E-04

-1.59E-03 4.03E-03 AP 07 28737 03/27/96 Ag-110M -2.02E-04 4.31E-04 1.78E-03 AP 07 28737 03/27/96 Ba-140 2.15E-03

-3.73E-03 1.38E-02 AP 07 28737 03/27/96 Be-7 0.10E+00 1.02E-02 2.10E-02

AP 07 28737 03/27/96 Ce-141 8.55E-04 6.81E-04 2.07E-03 l AP 07 28737 03/27/96 Ce-144 -1.36E-04 1.01E-03 3.38E-03

! AP 07 28737 03/27/96 Co-57 1.26E-04 1.48E-04 3.85E-04 l AP 07 28737 03/27/96 Co-58 4.51E-04

-1.20E-04 1.92E-03 I AP 07 28737 03/27/96 Co-60 1.01E-04 3.18E-04 1.32E-03 1

AP 07 28737 03/27/96 Cr-51 8.21E-04 5.10E-03 1.84E-02 AP 07 28737 03/27/96 Cs-134 3.27E-04 2.56E-04 8.65E-04 AP 07 28737 03/27/96 Cs-137 1.30E-04 3.57E-04 1.31E-03 AP 07 28737 03/27/96 Fe-59 3.75E-05 1.74E-03 7.49E-03 AP 07 28737 03/27/96 I-131 1.21E-03 6.50E-03 2.29E-02

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

_ _ _ ~ - - . . . . ~ - . _ . - . ~ - - . . - . ---- --_~._ _ .-- - . . . _ . - .. -.

l l

1 Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m) (pCi/cu.m) i l

AP 07 28737 03/27/96 K-40 2.92E-03 5.36E-03 1.95E-02 AP 07 28737 03/27/96 Mn-54 -1.77E-04 3.11E-04 1.27E-03 AP 07 28737 03/27/96 Ru-103 0.00E+00 5.41E-04 2.11E-03 AP 07 28737 03/27/96 Ru-106 -2.37E-03 2.21E-03 9.86E-03 AP 07 28737 03/27/96 Sb-124 -1.70E-03 1.27E-03 6.81E-03 .

AP 07 28737 03/27/96 Se-75 -3.67E-04 3.91E-04 1.44E-03 !

AP 07 28737 03/27/96 Th-232 -4.29E-04 9.17E-04 3.90E-03 AP 07 28737 03/27/96 Zn-65 -2.20E-04 9.08E-04 3.67E-03 AP 07 28737 03/27/96 Zr-95 -8.48E-04 7.74E-04 3.59E-03 '

AP 08 28738 03/27/96 Ag-110M -5.93E-04 3.83E-04 1.82E-03 AP 08 28738 03/27/96 Ba-140 5.59E-04 3.76E-03 1.55E-02 AP 08 28738 03/27/96 Be-7 0.12E+00 1.03E-02 1.80E-02

AP 08 28738 03/27/96 Ce-141 2.84E-05 6.31E-04 2.08E-03 AP 08 28738 03/27/96 Ce-144 4.10E-04 8.61E-04 2.81E-03 AP 08 28738 03/27/96 Co-57 3.44E-05 1.32E-04 4.27E-04 AP 08 28738 03/27/96 Co-58 1.41E-04 4.4BE-04 1.79E-03 AP 08 28738 03/27/96 Co-60 1.55E-04 2.57E-04 1.06E-03 i AP 08 28738 03/27/96 Cr-51 3.81E-03 6.20E-03 2.12E-02 l AP 08 28738 03/27/96 Cs-134 -5.48E-05 2.26E-04 9.14E-04 AP 08 28738 03/27/96 Cs-137 4.58E-04 2.70E-04 8.58E-04 l AP 08 28738 03/27/96 Fa-59 4.23E-03 1.60E-03 1.63E-03 AP 08 28738 03/27/96 I-131 6.58E-03 6.24E-03 2.06E-02 AP 08 28738 03/27/96 K-40 -3.17E-03 4.14E-03 1.81E-02 AP 08 28738 03/27/96 Mn-54 -3.73E-04 2.95E-04 1.31E-03 i

AP 08 28738 03/27/96 Ru-103 4.87E-04 5.97E-04 2.12E-03 i

AP 08 28738 03/27/96 Ru-106 5.48E-03 2.44E-03 7.01E-03 AP 08 28738 03/27/96 Sb-124 5.71E-04 1.28E-03 5.31E-03 l AP 08 28738 03/27/96 Se-75 1.26E-04 3.32E-04 1.15E-03 AP 08 28738 03/27/96 Th-232 3.83E-04 8.94E-04 3.44E-03 l AP 08 28738 03/27/96 Zn-65 0.00E+00 7.01E-04 2.91E-03 i

l AP 08 28738 03/27/96 Zr-95 3.56E-04 9.99E-04 3.86E-03 l

AP 01 30386 06/26/96 Ag-110M 3.97E-04 4.01E-04 1.38E-03 AP 01 30386 06/26/96 Ba-140 -5.71E-04 4.20E-03 1.84E-02 l AP 01 30386 06/26/96 Be-7 0.10E+00 1.00E-02 2.20E-02

30386 06/26/96 i

AP 01 Ce-141 8.19E-05 6.22E-04 2.04E-03 l AP 01 30386 06/26/96 Ce-144 -1.19E-03 8.78E-04 3.11E-03 l AP 01 30386 06/26/96 Co-57 1.11E-04 1.15E-04 3.56E-04 AP 01 30386 06/26/96 Co-58 2.13E-04 4.42E-04 1.71E-03 AP 01 30386 06/26/96 Co-60 -6.87E-04 3.66E-04 1.78E-03 AP 01 30386 06/26/96 Cr-51 -5.40E-03 6.58E-03 2.45E-02 AP 01 30386 06/26/96 Cs-134 -4.55E-04 1.82E-04 D.87E-04 AP 01 30386 06/26/96 Cs-137 -2.14E-04 2.29E-04 9.79E-04 AP 01 30386 06/26/96 Fe-59 -1.67E-03 2.24E-03 9.75E-03 AP 01 30386 06/26/96 I-131 -1.18E-02 9.99E-03 3.87E-02 l AP 01 30386 06/26/96 K-40 4.85E-04 4.45E-03 1.69E-02 i AP 01 30386 06/26/96 Mn-54 -3.21E-04 2.96E-04 1.23E-03 AP 01 30386 06/26/96 Ru-103 -6.55E-04 5.56E-04 2.35E-03 I AP 01 30386 06/26/96 Ru-106 -1.49E-03 2.39E-03 9.70E-03 AP 01 30386 06/26/96 Sb-124 2.05E-03 1.25E-03 3.77E-03

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

. ..____m . _ . _ . _ - _ _ _ _ _ _ _ . _ _ . _ . _ _ - _ . _ _ _ _ _ _ . . _ ._ _ - _

h j

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m) (pC1/cu.m)

AP 01 30386 06/26/96 Se-75 3.06E-04

-2.28E-04 1.13E-03 AP 01 30386 06/26/96 Th-232 6.63E-04 9.84E-04 3.52E-03 AP 01 30386 06/26/96 Zn-65 6.53E-04 7.11E-04 2.54E-03 AP 01 30386 06/26/96 Zr-95 2.54E-04 9.82E-04 3.78E-03 AP 02 30387 06/26/96 Ag-110M 3.69E-04

-7.47E-04 1.77E-03 AP 02 30387 06/26/96 Ba-140 7.25E-04 4.88E-03 2.01E-02 AP 02 30387 06/26/96 Be-7 0.12E+00 1.13E-02 2.32E-02

AP 02 30387 06/26/96 Ce-141 4.61E-04 5.90E-04 1.87E-03 AP 02 30387 06/26/96 Ce-144 -1.05E-03 9.04E-04 3.19E-03 AP 02 30387 06/26/96 Co-57 -2.03E-05 1.09E-04 3.65E-04 AP 02 30387 06/26/96 Co-58 4.88E-04 4.28E-04 1.53E-03 AP 02 30387 06/26/96 Co-60 -3.22E-04 3.21E-04 1.52E-03 AP 02 30387 06/26/96 Cr-51 -5.56E-03 6.80E-03 2.54E-02 AP 02 30387 06/26/96 Cs-134 1.74E-04 2.56E-04 9.16E-04 AP 02 30387 06/26/96 Cs-137 -4.41E-04 2.40E-04 1.10E-03 AP 02 30387 06/26/96 Fe-59 7.35E-05 2.09E-03 8.62E-03 AP 02 30387 06/26/96 I-131 7.82E-03 9.10E-03 3.08E-02 AP 02 30387 06/26/96 K-40 2.73E-03 4.47E-03 1.63E-02 AP 02 30387 06/26/96 Mn-54 -1.42E-04 2.38E-04 1.01E-03 AP 02 30387 06/26/96 Ru-103 -2.23E-04 5.88E-04 2.33E-03 AP 02 30387 06/26/96 Ru-106 -5.06E-04 2.29E-03 9.13E-03 AP 02 30387 06/26/96 Sb-124 -3.24E-03 1.71E-03 8.57E-03 AP 02 30387 06/26/96 Se-75 -2.56E-04 3.42E-04 1.25E-03 AP 02 30387 06/26/96 Th-232 3.03E-04 7.08E-04 2.77E-03 AP 02 30387 06/26/96 Zn-65 -6.89E-04 6.07E-04 2.87E-03 AP 02 30387 06/26/96 Zr-95 1.64E-03 9.16E-04 2.98E-03 AP 03 30388 06/26/96 Ag-110M 2.31E-04 3.26E-04 1.18E-03 AP 03 30388 06/26/96 Ba-140 -3.41E-03 5.23E-03 2.30E-02 AP 03 30388 06/26/96 Be-7 9.30E-02 9.02E-03 1.85E-02

AP 03 30388 06/26/96 Ce-141 -1.60E-04 5.93E-04 1.99E-03 AP 03 30388 06/26/96 Ce-144 1.02E-04 8.92E-04 2.90E-03 AP 03 30389 06/26/96 Co-57 1.01E-04 1.03E-04 3.18E-04 AP 03 30308 06/26/96 Co-58 1.S9E-04 4.56E-04 1.76E-03 AP 03 30388 06/26/96 Co-60 1.15E-05 3.26E-04 1.35E-03 AP 03 30388 06/26/96 Cr-51 8.46E-04 6.06E-03 2.14E-02 AP 03 30388 06/26/96 Cs-134 4.34E-05 2.17E-04 8.18E-04 AP 03 30388 06/26/96 Cs-137 -2.58E-04 2.12E-04 9.34E-04 AP 03 30388 06/26/96 Fe-59 -1.36E-03 1.44E-03 7.14E-03 AP 03 30388 06/26/96 I-131 1.14E-02 9.41E-03 3.07E-02 AP 03 30388 06/26/96 K-40 2.77E-03 4.70E-03 1.73E-02 AP 03 30388 06/26/96 Mn-54 -1.17E-04 2.63E-04 1.06E-03 .

AP 03 30388 06/26/96 Ru-103 -3.34E-04 5.56E-04 2.24E-03 AP 03 30388 06/26/96 Ru-106 -2.30E-03 1.95E-03 8.57E-03 AP 03 30388 06/26/96 Sb-124 2.97E-04 9.14E-04 4.07E-03 AP 03 30388 06/26/96 Se-75 -1.64E-04 3.23E-04 1.16E-03 AP 03 30388 06/26/96 Th-232 2.19E-04 9.32E-04 3.50E-03 AP 03 30388 06/26/96 Zn-65 -3.57E-04 7.15E-04 2.98E-03 AP 03 30388 06/26/96 Zr-95 3.35E-04 8.58E-04 3.30E-03 t

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m) (

____________________________________________________________________pCi/cu.m) __________

AP 04 30389 06/26/96 Ag-110M -1.30E-04 3.23E-04 1.36E-03 AP 04 30389 06/26/96 Ba-140 8.07E-10 5.21E-03 2.13E-02 AP 04 30389 06/26/96 Be-7 0.11E+00 9.77E-03 1.72E-02

AP 04 30389 06/26/96 Ce-141 -5.88E-04 5.37E-04 1.92E-03 AP 04 30389 06/26/96 Ce-144 -3.35E-04 8.17E-04 2.77E-03 AP 04 30389 06/26/96 Co-57 -2.76E-04 9.74E-05 3.78E-04 AP 04 30389 06/26/96 Co-58 -4.85E-04 4.72E-04 2.07E-03 AP 04 30389 06/26/96 Co-60 -4.33E-04 2.54E-04 1.35E-03 l

AP 04 30389 06/26/96 Cr-51 2.87E-03 7.08E-03 2.42E-02 AP 04 30389 06/26/96 Cs-134 2.34E-04

-8.85E-05 9.18E-04 AP 04 30389 06/26/96 Cs-137 -1.05E-04 2.57E-04 1.02E-03 AP 04 30389 06/26/96 Fe-59 1.36E-04 1.56E-03 6.67E-03 AP 04 30389 06/26/96 I-131 1.69E-02 9.20E-03 2.81E-02

! AP 04 30389 06/26/96 K-40 -6.88E-03 3.85E-03 1.75E-02 AP 30389 06/26/96 04 Mn-54 6.57E-05 2.47E-04 9.34E-04 l AP 04 30389 06/26/96 Ru-103 -6.24E-04 5.64E-04 2.35E-03 l AP 04 30389 06/26/96 Ru-106 -1.45E-03 2.11E-03 8.78E-03 AP 04 30389 06/26/96 Sb-124 0.00E+00 1.22E-03 5.37E-03 AP 04 30389 06/26/96 Se-75 -3.63E-05 2.98E-04 1.06E-03 AP 04 30389 06/26/96 Th-232 1.45E-03 9.23E-04 2.94E-03 AP 04 30389 06/26/96 Zn-65 -7.26E-04 7.26E-04 3.16E-03 AP 04 30389 06/26/96 Zr-95 -9.59E-04 9.76E-04 4.13E-03 3 AP 05 30390 06/26/96 Ag-110M 1.91E-04 3.72E-04 1.37E-03 AP 05 30390 06/26/96 Ba-140 -5.69E-03 5.08E-03 2.38E-02 AP 05 30390 06/26/96 Be-7 0.11E+00 9.98E-03 1.90E-02

AP 05 30390 06/26/96 Ce-141 -3.00E-04 5.64E-04 1.94E-03 AP 05 30390 06/26/96 Ce-144 9.88E-04 8.90E-04 2.73E-03 AP 05 30390 06/26/96 Co-57 1.10E-04 1.14E-04 3.54E-04 AP 05 30390 06/26/96 Co-58 -6.91E-04 4.28E-04 2.02E-03 AP 05 30390 06/26/96 Co-60 2.51E-04 2.26E-04 8.13E-04 AP 05 30390 06/26/96 Cr-51 -2.45E-03 6.11E-03 2.24E-02 <

AP 05 30390 06/26/96 Cs-134 -2.71E-04 2.48E-04 1.02E-03 AP 05 30390 06/26/96 Cs-137 -1.07E-04 2.63E-04 1.05E-03 AP 05 30390 06/26/96 Fe-59 -3.89E-03 1.93E-03 9.72E-03 AP 05 30390 06/26/96 I-131 2.11E-02 8.80E-03 2.49E-02 AP 05 30390 06/26/96 K-40 9.63E-03 5.85E-03 1.93E-02 AP 05 30390 06/26/96 Mn-54 -3.80E-04 2.70E-04 1.18E-03 )

AP 05 30390 06/26/96 Ru-103 -2.28E-04 6.23E-04 2.42E-03 '

AP 05 30390 06/26/96 Ru-106 0.00E+00 2.32E-03 8.97E-03 AP 05 30390 06/26/96 Sb-124 1.27E-04 1.42E-03 5.97E-03 AP 05 30390 06/26/96 Se-75 4.55E-04 2.98E-04 9.42E-04 AP 05 30390 06/26/96 Th-232 8.27E-04 9.08E-04 3.18E-03 AP 05 30390 06/26/96 Zn-65 -1.10E-03 8.28E-04 3.61E-03 AP 05 30390 06/26/96 Zr-95 9.82E-04 7.99E-04 2.81E-03 l

AP 06 30391 06/26/96 Ag-110M -1.45E-04 3.94E-04 1.59E-03 AP 06 30391 06/26/96 Ba-140 7.82E-03 5.96E-03 1.97E-02 AP 06 30391 06/26/96 Be-7 0.11E+00 1.02E-02 1.95E-02

AP 06 30391 06/26/96 Ce-141 -1.03E-03 5.92E-04 2.17E-03 AP 06 30391 06/26/96 Ce-144 1.32E-04 8.45E-04 2.78E-03 l

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

1 l l

_. . __ _ _. ._ . __m ._ .- _ _ . . _ _ . . ..

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996) '

SAMPLE CONC.

TYPE STA. STD DEV. MDC LSN END DATE NUCLIDE

.- pCi/cu.m)

(pCi/cu.m) ( (pCi/cu.m) l AP 06 30391 06/26/96 Co-57

-1.56E-04 9.70E-05 3.58E-04 AP 06 30391 06/26/96 Co-58 -5.44E-04 3.47E-04 1.74E-03 AP 06 30391 06/26/96 Co-60 1.96E-04 1.99E-04 7.48E-04 AP 06 30391 06/26/96 Cr-51 4.44E-03 6.67E-03 2.26E-02 l AP 06 30391 06/26/96 Cs-134 1.85E-04 1.85E-04 6.52E-04 AP 06 30391 06/26/96 Cs-137 -7.84E-06 2.06E-04 8.31E-04 AP 06 30391 06/26/96 Fe-59 AP

-1.35E-03 1.25E-03 6.69E-03 06 30391 06/26/96 I-131 7.22E-03 9.65E-03 3.28E-02 AP 06 30391 06/26/96 K-40 -3.25E-03 4.47E-03 1.83E-02 AP 06 30391 06/26/96 Mn-54 -5.14E-05 2.71E-04 1.07E-03 AP 06 30391 06/26/96 Ru-103 7.3BE-04 4.90E-04 1,61E-03 AP 06 30391 06/26/96 Ru-106 1.01E-03 1.89E-03 7.13E-03 AP 06 30391 06/26/96 Sb-124 1.57E-03 AP 1.17E-03 3.84E-03 06 30391 06/26/96 Se-75 -1,34E-04 3.23E-04 1.16E-03 AP 06 30391 06/26/96 Th-232 -1.10E-03 8.64E-04 3.84E-03 AP 06 30391 06/26/96 Zn-65 6.83E-04 7.68E-04 2.75E-03 AP 06 30391 06/26/96 Zr-95 6.79E-04 9.94E-04 3.68E-03 l AP 07 30392 06/26/96 Ag-110M 1.30E-04 4.37E-04 1.62E-03 l AP 07 30392 06/26/96 Ba-140 -6.20E-03 3.98E-03 2.14E-02 AP 07 30392 06/26/96 Be-7 8.89E-02 9.48E-03 2.24E-02 * !

l AP 07 30392 06/26/96 Ce-141 -7.54E-04 5.98E-04 2.14E-03 i AP 07 30392 06/26/96 Ce-144 -9.31E-04 8.66E-04 3.04E-03

, AP 07 30392 06/26/96 Co-57 2.69E-04 1.16E-04 3.27E-04 l AP 07 30392 06/26/96 Co-58 -5.07E-05 3.66E-04 1.57E-03 AP 07 30392 06/26/96 Co-60 -7.09E-04 3.73E-04 1.81E-03 AP 07 30392 06/26/96 Cr-51 -8.04E-03 6.18E-03 2.41E-02 AP 07 30392 06/26/96 Cs-134 9.24E-05 2.44E-04 9.00E-04 AP 07 30392 06/26/96 Cs-137 -2.74E-04 2.39E-04 1.03E-03 AP 07 30392 06/26/96 Fe-59 -2.34E-03 2.37E-03 1.05E-02 AP 07 30392 06/26/96 -1.40E-02 I-131 1.03E-02 4.05E-02 AP 07 30392 06/26/96 K-40 6.55E-04 4.06E-03 1.57E-02 AP 07 30392 06/26/96 Mn-54 i

-1.80E-04 2.69E-04 1.11E-03 AP 07 30392 06/26/96 Ru-103 2.33E-04 5.70E-04 2.11E-03 AP 07 30392 06/26/96 Ru-106 -5.05E-04 2.08E-03 8.42E-03 AP 07 30392 06/26/96 Sb-124 1.04E-03 1.28E-03 4.84E-03 AP 07 30392 06/26/96 Se-75 -1.12E-04 3.10E-04 1.12E-03 l AP 07 30392 06/26/96 Th-232 2.72E-04 9.35E-04 3.52E-03 ,

AP 07 30392 06/26/96 Zn-65 5.68E-04 AP 6.28E-04 2.28E-03 l 07 30392 06/26/96 Zr-95 -8.07E-04 7.13E-04 3.31E-03 AP 08 30393 06/26/96 Ag-110M -7.71E-05 4.07E-04 1.60E-03 AP 08 30393 06/26/96 Ba-140 -3.06E-03 4.75E-03 2.17E-02 AP 08 30393 06/26/96 Be-7 8.44E-02 8.66E-03 1.64E-02

AP 08 30393 06/26/96 Ce-141 -1.94E-04 6.06E-04 2.05E-03 AP 08 30393 06/26/96 Ce-144 -7.68E-04 7.68E-04 2.73E-03 s AP 08 30393 06/26/96 Co-57 -5.31E-05 9.62E-05 3.34E-04 l AP 08 30393 06/26/96 Co-58 3.05E-04 3.35E-04 1.25E-03

AP 08 30393 06/26/96 Co-60 2.93E-04

-2.42E-04 1.38E-03 1

AP 08 30393 06/26/96 Cr-51 8.96E-03 6.73E-03 2.16E-02 AP 08 30393 06/26/96 Cs-134 -2.31E-04 2.29E-04 9.48E-04

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC.

TYPE STD DEV. MDC STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m)

____________________________________________________________________(pCi/cu.m)

AP 08 30393 06/26/96 Cs-137 -5.72E-04 2.20E-04 1.08E-03 AP 08 30393 06/26/96 Fe-59 4.22E-04 1.32E-03 5.69E-03 AP 08 30393 06/26/96 I-131 1.77E-02 9.66E-03 2.95E-02 AP 08 30393 06/26/96 K-40 AP

-6.48E-04 4.16E-03 1.64E-02 08 30393 06/26/96 Mn-54 2.03E-04 2.72E-04 9.63E-04 AP 08 30393 06/26/96 Ru-103 0.00E+00 5.65E-04 2.17E-03 AP 08 30393 06/26/96 Ru-106 1.81E-03 2.36E-03 8.47E-03 AP 08 30393 06/26/96 Sb-124 -9.28E-04 1.01E-03 5.41E-03 AP 08 30393 06/26/96 Se-75 -2.29E-04 3.08E-04 1.14E-03 AP 08 30393 06/26/96 Th-232 5.47E-04 1.05E-03 3.78E-03 AP 08 30393 06/26/96 Zn-65 -1.87E-04 6.75E-04 2.81E-03 AP 08 30393 06/26/96 Zr-95 1.92E-04 7.71E-04 3.07E-03

$ AP 01 32190 09/25/96 Ag-110M -3.46E-04 2.95E-04 1.33E-03 AP 01 32190 09/25/96 Ba-140 4.77E-03 4.03E-03 1.37E-02 AP 01 32190 09/25/96 Be-7 9.81E-02 8.68E-03 1.52E-02

AP 01 32190 09/25/96 Ce-141 5.93E-04 ' . 3 6E-04 1.97E-03 AP 01 32190 09/25/96 Ce-144 -9.64E-04 7.60E-04 2.69E-03 AP 01 32190 09/25/96 Co-57 5.03E-05 1.15E-04 3.65E-04 AP 01 32190 09/25/96 Co-58 -6.99E-04 4.94E-04 2.17E-03 AP 01 32190 09/25/96 Co-60 2.58E-04 3.68E-04 1.37E-03 AP 01 32190 09/25/96 Cr-51 6.74E-03

-2.91E-04 2.39E-02 AP 01 32190 09/25/96 Cs-134 7.84E-05 2.29E-04 8.36E-04 AP 01 32190 09/25/96 Cs-137 -1.85E-04 2.07E-04 8.71E-04 AP 01 32190 09/25/96 Fe-59 2.04E-03 1.01E-03 7.87E-03 AP 01 32190 09/25/96 I-131 -1.86E-02 1.41E-02 5.59E-02 AP 01 32190 09/25/96 K-40 -5.89E-03 3.91E-03 1.68E-02 AP 01 32190 09/25/96 Mn-54 -3.74E-04 2.27E-04 1.02E-03 AP 01 32190 09/25/96 Ru-103 -5.12E-05 6.06E-04 2.31E-03 AP 01 32190 09/25/96 Ru-106 4.53E-03 2.34E-03 7.35E-03 AP 01 32190 09/25/96 Sb-124 9.08E-04 1.34E-03 5.14E-03 AP 01 32190 09/25/96 Se-75 2.35E-04 3.06E-04 1.02E-03 AP 01 32190 09/25/96 Th-232 9.83E-04 9.66E-04 3.30E-03 AP 01 32190 09/25/96 Zn-65 -3.50E-04 5.67E-04 2.47E-03 AP 01 32190 09/25/96 Zr-95 -1.46E-03 9.46E-04 4.14E-03 AP 02 32191 09/25/96 Ag-110M -9.56E-04 4.30E-04 1.90E-03 AP 02 32191 09/25/96 Pa-140 -6.18E-03 6.21E-03 2.89E-02 AP 02 32191 09/25/96 Be-7 0.12E+00 1.02E-02 1.82E-02

AP 02 32191 09/25/96 Ce-141 -2.75E-05 7.17E-04 2.34E-03 AP 02 32191 09/25/96 Ce-144 -4.41E-04 7.75E-04 2.64E-03 AP 02 32191 09/25/96 Co-57 -5.56E-05 1.06E-04 3.55E-04 AP 02 32191 09/25/96 Co-58 3.10E-04 3.97E-04 1.48E-03 AP 02 32191 09/25/96 Co-60 2.40E-04 3.13E-04 1.17E-03 AP 02 32191 09/25/96 Cr-51 -4.40E-03 7.00E-03 2.57E-02 AP 02 32191 09/25/96 Cs-134 -4.00E-05 2.43E-04 9.19E-04 AP 02 32191 09/25/96 Cs-137 3.30E-04 2.16E-04 7.09E-04 AP 02 32191 09/25/96 Fe-59 4.05E-04 1.49E-03 6.26E-03 AP 02 32191 09/25/96 I-131 4.34E-03 1.74E-02 6.06E-02 AP 02 32191 09/25/96 K-40 -1.29E-03 3.88E-03 1.54E-02

, AP 02 32191 09/25/96 Mn-54 1.29E-04 2.17E-04 7.91E-04

)

Radioactivity detected (i .e. , Concentration > 3 Std. Deviations).

_ _ _ _ _ _ _ _ _ _ _ _ = _m _ _ _ _ _ _ _ _ _ _ _ _ .

l l

Seabrook Nuclear Power Station '

l Radiological Environmental Monitoring Data l (January - December 1996)

SAMPLE CONC. STD DEV. MDC i TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m) (pCi/cu.m) l AP 02 32191 09/25/96 Ru-103 -5.61E-04 6.24E-04 2.52E-03 AP 02 32191 09/25/96 Ru-106 2.20E-03 2.20E-03 7.66E-03 AP 02 32191 09/25/96 Sb-124 1.95E-03 1.18E-03 3.51E-03 AP 02 32191 09/25/96 Se-75 3.33E-05 2.69E-04 9.43E-04 AP 02 32191 09/25/96 Th-232 -9.61E-04 7.98E-04 3.47E-03 AP 02 32191 09/25/96 Zn-65 3.32E-04 7.05E-04 2.64E-03 AP 02 32191 09/25/96 Zr-95 5.62E-04 9.23E-04 3.44E-03 AP 03 32192 09/25/96 Ag-110M -5.47E-04 3.84E-04 1.65E-03 AP 03 32192 09/25/96 Ba-140 -4.06E-03 5.02E-03 2.44E-02 AP 03 32192 09/25/96 Be-7 8.38E-02 8.71E-03 2.06E-02

AP 03 32192 09/25/96 Ce-141 -8.13E-05 6.25E-04 2.07E-03 AP 03 32192 09/25/96 Ce-144 6.32E-04 7.57E-04 2.37E-03 AP 03 32192 09/25/96 Co-57 3.83E-05 9.84E-05 3.16E-04 AP 03 32192 09/25/96 Co-58 -3.26E-04 3.75E-04 1.68E-03 AP 03 32192 09/25/96 Co-60 4.96E-04 2.03E-04 2.24E-04 AP 03 32192 09/25/96 Cr-51 -3.82E-03 6.59E-03 2.43E-02 AP 03 32192 09/25/96 Cs-134 -1.18E-04 2.04E-04 8.13E-04 AP 03 32192 09/25/96 Cs-137 9.25E-05 1.73E-04 6.53E-04 AP 03 32192 09/25/96 Fe-59 1.99E-04 1.86E-03 7.65E-03 AP 03 32192 09/25/96 I-131 -1.49E-02 1.65E-02 6.21E-02 AP 03 32192 09/25/96 K-40 4.15E-03 4.62E-03 1.62E-02 AP 03 32192 09/25/96 Mn-54 -7.33E-05 2.73E-04 1.05E-03 AP 03 32192 09/25/96 Ru-103 4.41E-04 7.15E-04 2.54E-03 AP 03 32192 09/25/96 Ru-106 4.31E-04 1.98E-03 7.52E-03 AP 03 32192 09/25/96 Sb-124 -2.32E-03 1.42E-03 7.08E-03 AP 03 32192 09/25/96 Se-75 -3.01E-04 2.78E-04 1.04E-03 AP 03 32192 09/25/96 Th-232 -2.58E-04 7.99E-04 3.20E-03 AP 03 32192 09/25/96 Zn-65 -6.65E-04 5.17E-04 2.46E-03 AP 03 32192 09/25/96 Zr-95 -3.51E-04 6.37E-04 2.81E-03 AP 04 32193 09/25/96 Ag-110M -3.06E-04 3.52E-04 1.47E-03 AP 04 32193 09/25/96 Ba-140 5.04E-03 6.39E-03 2.33E-02 AP 04 32193 09/25/96 Be-7 9.06E-02 8.53E-03 1.62E-02

AP 04 32193 09/25/96 Ce-141 5.32E-05 6.15E-04 2.02E-03 AP 04 32193 09/25/96 Ce-144 -7.25E-04 7.46E-04 2.60E-03 AP 04 32193 09/25/96 Co-57 -6.56E-05 9.55E-05 3.27E-04 AP 04 32193 09/25/96 Co-58 6.21E-04 3.86E-04 1.28E-03 AP 04 32193 09/25/96 Co-60 3.04E-05 2.84E-04 1.17E-03 !

AP 04 32193 09/25/96 Cr-51 8.66E-03 6.50E-03 2.09E-02 AP 04 32193 09/25/96 Cs-134 -3.84E-05 2.14E-04 8.18E-04 l

AP 04 32193 09/25/96 Cs-137 1.36E-04 1.75E-04 6.39E-04 AP 04 32193 09/25/96 Fe-59 1.24E-03 1.97E-03 7.50E-03 AP 04 32193 09/25/96 I-131 1.85E-02 1.35E-02 4.34E-02 AP 04 32193 09/25/96 K-40 4.87E-03 5.00E-03 1.78E-02 AP 04 32193 09/25/96 Mn-54 -1.44E-05 2.37E-04 9.15E-04 AP 04 32193 09/25/96 Ru-103 -6.49E-04 6.11E-04 2.48E-03 AP 04 32193 09/25/96 Ru-106 -8.77E-04 2.24E-03 8.77E-03 i AP 04 32193 09/25/96 Sb-124 0.00E+00 1.47E-03 6.09E-03 AP 04 32193 09/25/96 Se-75 -3.65E-04 3.18E-04 1.17E-03

! AP 04 32193 09/25/96 Th-232 -4.81E-05 7.60E-04 2.99E-03

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l l

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. L3N END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m) (pCi/cu.m) l AP 04 32193 09/25/96 Zn-65 -3.19E-04 5.04E-04 2.25E-03 AP 04 32193 09/25/96 Zr-95 -7.45E-04 7.73E-04 3.38E-03 AP 05 32194 09/25/96 Ag-110M 4.67E-05 4.20E-04 1.57E-03 AP 05 32194 09/25/96 Ba-140 -1.57E-03 4.72E-03 2.23E-02 AP 05 32194 09/25/96 Be-7 0.11E+00 1.05E-02 2.01E-02

AP 05 32194 09/25/96 Ce-141 -8,52E-05 6.72E-04 2.23E-03 AP 05 32194 09/25/96 Ce-144 8.35E-04 9.22E-04 2.85E-03 AP 05 32194 09/25/96 Co-57 -1.23E-04 1.07E-04 3.72E-04 AP 05 32194 09/25/96 Co-58 7.67E-05 4.15E-04 1.66E-03 AP 05 32194 09/25/96 Co-60 1.84E-04 3.76E-04 1.43E-03 AP 05 32194 09/25/96 Cr-51 6.28E-03 6.84E-03 2.27E-02 AP 05 32194 09/25/96 Cs-134 3.30E-05 1.98E-04 7.49E-04 AP 05 32194 09/25/96 Cs-137 2.42E-04 2.00E-04 6.82E-04 AP 05 32194 09/25/96 Fe-59 -1.04E-03 2.14E-03 9.20E-03 AP 05 32194 09/25/96 I-131 2.24E-03 1.80E-02 6.33E-02 AP 05 32194 09/25/96 K-40 4.34E-03 4.83E-03 1.69E-02 AP 05 32194 09/25/96 Mn-54 1.46E-04 2.77E-04 9.95E-04 AP 05 32194 09/25/96 Ru-103 -1.73E-03 7.39E-04 3.16E-03 AP 05 32194 09/25/96 Ru-106 4.51E-04 2.16E-03 8.19E-03 AP 05 32194 09/25/96 Sb-124 -2.37E-10 1.40E-03 5.96E-03 AP 05 32194 09/25/96 Se-75 1.03E-04 3.46E-04 1.18E-03 AP 05 32194 09/25/96 Th-232 -1.49E-03 9.58E-04 4.10E-03 AP 05 32194 09/25/96 Zn-65 -8.52E-04 7.81E-04 3.32E-03 AP 05 32194 09/25/96 Zr-95 1.03E-03 8.96E-04 3.17E-03 AP 06 32195 09/25/96 Ag-110M 2.89E-05 3.23E-04 1.26E-03 AP 06 32195 09/25/96 Ba-140 2.83E-03 5.52E-03 2.17E-02 AP 06 32195 09/25/96 Be-7 0.12E+00 1.02E-02 1.94E-02

AP 06 32195 09/25/96 Ce-141 -1.50E-04 6.26E-04 2.10E-03 AP 06 32195 09/25/96 Ce-144 2.11E-03 8.48E-04 2.37E-03 l AP 06 32195 09/25/96 Co-57 -7.61E-05 1.01E-04 3.46E-04 i AP 06 32195 09/25/96 Co-58 1.97E-04 4.09E-04 1.58E-03 AP 06 32195 09/25/96 Co-60 -2.96E-04 3.19E-04 1.43E-03 AP 06 32195 09/25/96 Cr-51 1.57E-02 7.50E-03 2.27E-02 l AP 06 32195 09/25/96 Cs-134 -1.44E-04 2.00E-04 8.10E-04

AP 06 32195 09/25/96 Cs-137 -4.66E-05 2.03E-04 8.12E-04 AP 06 32195 09/25/96 Fe-59 -1.41E-03 1.64E-03 7.73E-03 AP 06 32195 09/25/96 I-131 -3.19E-02 1.69E-02 6.72E-02 i AP 06 32195 09/25/96 K-40 -7.14E-04 3.95E-03 1.54E-02 l AP 06 32195 09/25/96 Mn-54 -8.13E-05 2.64E-04 1.03E-03 AP 06 32195 09/25/96 Ru-103 -3.35E-Od 6.60E-04 2.56E-03 AP 06 32195 09/25/96 Ru-106 0.00E+00 1.95E-03 7.58E-03 AP 06 32195 09/25/96 Sb-124 0.00E+00 1.36E-03 5.76E-03 AP 06 32195 09/25/96 Se-75 3.23E-04 2.95E-04 9.61E-04 AP 06 32195 09/25/96 Th-232 2.97E-04 7.43E-04 2.81E-03 AP 06 32195 09/25/96 Zn-65 -1.15E-03 6.36E-04 2.98E-03 AP 06 32195 09/25/96 Zr-95 7.09E-04 7.76E-04 2.84E-03 l AP 07 32196 09/25/96 Ag-110M -1.59E-04 2.08E-04 1.01E-03 AP 07 32196 09/25/96 Ba-140 9.61E-03 7.33E-03 2.42E-02 a

Radioactivity detected (i.e., Concentration > 3 Std. Deviations). ;

_ . _ -- _.. -.. . . . . .. - . _ - . _-- -- - - _ - . . - . . - ~ . - . .-

l l

i t

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996) i SAMPLE CONC.

TYPE STD DEV. MDC STA. LSN E!!D DATE NUCLIDE

..................................................................)..(pCi/cu.m)

(pCi/cu.m) (pCi/cu.m AP 07 32196 09/25/96 Be-7 9.80E-02 9.53E-03 1.95E-02

AP 07 32196 09/25/96 Ce-141 -4.96E-04 6.26E-04 2.16E-03 AP 07 32196 09/25/96 Ce-144 2.70E-04 8.56E-04 2.75E-03 AP 07 32196 09/25/96 Co-57 0.00E+00 AP 8.71E-05 2.91E-04 07 32196 09/25/96 Co-58 -8.60E-05 3.42E-04 1.48E-03 AP 07 32196 09/25/96 Co-60 -4.19E-05 2.52E-04 1.10E-03 AP 07 32196 09/25/96 Cr-51 -1.70E-03 6.99E-03 2.51E-02 AP 07 32196 09/25/96 Cs-134 1.99E-04 2.14E-04 7.48E-04 AP 07 32196 09/25/96 Cs-137 1.06E-04 1.98E-04 7.34E-04 AP 07 32196 09/25/96 Fe-59 1.35E-04 2.06E-03 8.38E-03 AP 07 32196 09/25/96 5.69E-03 I-131 1.47E-02 5.15E-02 AP 07 32196 09/25/96 K-40 2.52E-03 4.27E-03 1.57E-02 AP 07 32196 09/25/96 Mn-54 -4.16E-04 2.61E-04 1.13E-03 AP 07 32196 09/25/96 Ru-103 2.04E-04 5.51E-04 2.05E-03 AP 07 32196 09/25/96 Ru-106 4.38E-04 1.80E-03 6.94E-03 AP 07 32196 09/25/96 Sb-124 4.82E-04 1.08E-03 4.47E-03 AP 07 32196 09/25/96 Se-75 1.92E-04 3.27E-04 1.10E-03 AP 07 32196 09/25/96 Th-232 -7.89E-04 1.02E-03 4.05E-03 AP 07 32196 09/25/96 Zn-65 -1.07E-03 7.48E-04 3.27E-03 AP 07 32196 09/25/96 Zr-95 3.57E-04 7.39E-04 2,85E-03 AP 08 32197 09/25/96 Ag-110M 2.96E-04 3.58E-04 1.26E-03 AP 08 32197 09/25/96 Ba-140 5.03E-03 5.14E-03 1.85E-02 AP 08 32197 09/25/96 Be-7 0.10E+00 9.47E-03 1.94E-02

AP 08 32197 09/25/96 Ce-141 -7.96E-04 6.96E-04 2.40E-03 AP 08 32197 09/25/96 Ce-144 6.02E-04 6.36E-04 2.62E-03 AP 08 32197 09/25/96 Co-57 -8.43E-06 1.01E-04 3.33E-04 AP 08 32197 09/25/96 Co-58 ~5.78E-04 4.14E-04 1.90E-03 AP 08 32197 09/25/96 Co-60 -7.27E-05 3.31E-04 1.38E-03 AP 08 32197 09/25/96 Cr-51 -9.12E-03 7.52E-03 2.82E-02 l AP 08 32197 09/25/96 Cs-134 -1.71E-04 2.31E-04 9.13E-04 AP 08 32197 09/25/96 Cs-137 2.32E-04 2.13E-04 7.38E-04 AP 08 32197 09/25/96 Fe-59 -1.64E-03 2.01E-03 8.96E-03 AP 08 32197 09/25/96 I-131 1.32E-03 1.71E-02 6.04E-02 AP 08 32197 09/25/96 K-40 7.33E-04 3.62E-03 1.38E-02 AP 08 32197 09/25/96 Mn-54 -1.48E-05 2.81E-04 1.06E-03 AP 08 32197 09/25/96 Ru-103 -8,52E-05 6.57E-04 2.49E-03 AP 08 32197 09/25/96 Ru-106 -1.74E-03 2.30E-03 9.25E-03 AP 08 32197 09/25/96 Sb-124 -4.78E-04 1.07E-03 5.15E-03 AP 08 32197 09/25/96 Se-75 2.44E-04 2.89E-04 9.59E-04 l AP 08 32197 09/25/96 Th-232 -4.94E-05 7.80E-04 3.07E-03 AP 08 32197 09/25/96 Zn-65 -1.91E-04 5.94E-04 2.48E-03 AP 08 32197 09/25/96 Zr-95 -2.66E-04 8.16E-04 3.36E-03 i

i

't

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

r- _ - - _ . ~. - .- - - . . . -. .-.._ . - - -. ..- - -- -

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996) l SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m) (pCi/cu.m) l AP 01 33891 12/31/96 Ag-110M 3.27E-05 3.74E-04 1.41E-03 AP 01 33891 12/31/96 Ba-140 -2.83E-03 6.02E-03 2.62E-02 AP 01 33891 12/31/96 Be-7 7.37E-02 8.55E-03 1.76E-02

AP 01 33891 12/31/96 Ce-141 6.65E-04 6.65E-04 2.05E-03 AP 01 33891 12/31/96 Ce-144 -4.55E-04 7.10E-04 2.44E-03 AP 01 33891 12/31/96 Co-57 1.15E-04 9.54E-05 2.91E-04 AP 01 33891 12/31/96 Co-58 6.39E-05 4.38E-04 1.73E-03 AP 01 33891 12/31/96 Co-60 3.02E-04 2.35E-04 8.14E-04 AP 01 33891 12/31/96 Cr-51 6.52E-04 7.10E-03 2.48E-02 AP 01 33891 12/31/96 Cs-134 3.44E-04 2.13E-04 6.93E-04 AP 01 33891 12/31/96 Cs-137 1.80E-04

-9.00E-05 7.50E-04 AP 01 33891 12/31/96 Fe-59 -2.74E-03 1.59E-03 7.94E-03 AP 01 33891 12/31/96 I-131 -1.99E-02 1.28E-02 5.16E-02 AP 01 33891 12/31/96 K-40 1.63E-03 3.92E-03 1.44E-02 AP 01 33891 12/31/96 Mn-54 5.29E-04 2.90E-04 8.92E-04 AP 01 33891 12/31/96 Ru-103 8.05E-04 6.37E-04 2.15E-03 AP 01 33891 12/31/96 Ru-106 2.52E-03 2.06E-03 7.01E-03 AP 01 33891 12/31/96 Sb-124 4.66E-04 1.04E-03 4.32E-03 AP 01 33891 12/31/96 Se-75 -2.24E-04 2.97E-04 1.08E-03 AP 01 33891 12/31/96 Th-232 -1.60E-03 8.33E-04 3.72E-03 AP 01 33891 12/31/96 Zn-65 -1.11E-03 4.77E-04 2.52E-03 AP 01 33891 12/31/96 Zr-95 2.30E-04 8.89E-04 3.42E-03 AP 02 33892 12/31/96 Ag-110M -5.22E-04 3.11E-04 1.43E-03 AP 02 33892 12/31/96 Ba-140 -3.04E-03 5.38E-03 2.45E-02 AP 02 33892 12/31/96 Be-7 8.35E-02 8.55E-03 1.76E-02

AP 02 33892 12/31/96 Ce-141 1.25E-03 6.89E-04 2.02E-03 AP 02 33892 12/31/96 Ce-144 -3.24E-05 7.86E-04 2.58E-03 AP 02 33892 12/31/96 Co-57 8.17E-06 9.19E-05 3.02E-04 AP 02 33892 12/31/96 Co-58 1.28E-04 3.24E-04 1.30E-03 AP 02 33892 12/31/96 Co-60 -4.12E-04 3.25E-04 1.48E-C' l

AP 02 33892 12/31/96 Cr-51 9.79E-04 6.70E-03 2.34E-02 AP 02 33892 12/31/96 Cs-134 {

-1.53E-04 2.09E-04 8.35E-04 AP 02 33892 12/31/96 Cs-137 8.99E-05 1.80E-04 6.75E-04 1

I i AP 02 33892 12/31/96 Fe-59 -1.48E-03 1.61E-03 7.62E-03 l AP 02 33892 12/31/96 I-131 -5.26E-03 1.36E-02 5.04E-02 AP 02 33892 12/31/96 K-40 5.64E-04 4.16E-03 1.55E-02 AP 02 33892 12/31/96 Mn-54 -3.07E-04 2.28E-04 9.94E-04 AP 02 33892 12/31/96 Ru-103 -1.08E-03 5.08E-04 2.31E-03 AP 02 33892 12/31/96 Ru-106 -5.46E-03 2.34E-03 1.03E-02 AP 02 33892 12/31/96 Sb-124 9.31E-05 1.46E-03 6.00E-03 AP 02 33892 12/31/96 Se-75 1.05E-05 3.02E-04 1.05E-03 AP 02 33892 12/31/96 Th-232 -7.16E-04 8.25E-04 3.42E-03 i

AP 02 33892 12/31/96 Zn-65 -1.46E-03 7.97E-04 3.49E-03 AP 02 33892 12/31/96 Zr-95 7.32E-04 6.06E-04 2.14E-03 AP 03 33893 12/31/96 Ag-110M 6.94E-05 2.79E-04 1.07E-03 AP 03 33893 12/31/96 Ba-140 -3.70E-03 6.40E-03 2.93E-02 AP 03 33893 12/31/96 Be-7 6.05E-02 7.19E-03 1.60E-02

AP 03 33893 12/31/96 Ce-141 6.12E-04 j 4.61E-04 1.92E-03

AP 03 33893 12/31/96 Ce-144 3.35E-04 6.72E-04 2.15E-03 j

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l l

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m) (pCi/cu.m)

L AP 03 33893 12/31/96 Co-57 7.44E-06 8.37E-05 2.75E-04 AP 03 33893 12/31/96 Co-58 -4.51E-04 3.09E-04 1.49E-03 AP 03 33893 12/31/96 Co-60 4.70E-05 2.75E-04 1.11E-03 AP 03 33893 12/31/96 Cr-51 -8.93E-04 7.09E-03 2.48E-02 AP 03 33893 12/31/96 Cs-134 -2.0BE-04 2.14E-04 8.52E-04 AP 03 33893 12/31/96 Cs-137 2.73E-05 1 98E-04 7.52E-04 :

AP 03 33893 12/31/96 Fe-59 -8.31E-04 1.o9E-03 7.38E-03 ,

AP 03 33893 12/31/96 I-131 -3.16E-03 1.33E-02 4.81E-02 AP 03 33893 12/31/96 K-40 1.17E-03 3.73E-03 1.37E-02 AP 03 33893 12/31/96 Mn-54 2.47E-04 1.99E-04 6.60E-04 AP 03 33893 12/31/96 Ru-103 2.57E-04 5.17E-04 1.88E-03 AP 03 33893 12/31/96 Ru-106 3.83E-04 1.99E-03 7.45E-03 AP 03 33893 12/31/96 Sb-124 8.48E-04

-8.48E-04 4.57E-03 AP 03 33893 12/31/96 Se-75 2.57E-04

-5.71E-04 1.01E-03 AP 03 33893 12/31/96 Th-232 6.71E-04

-1.02E-03 3.01E-03 AP 03 33893 12/31/96 Zn-65 4.82E-04 4.26E-04 1.49E-03 AP 03 33893 12/31/96 Zr-95 8.35E-04

-3.14E-04 3.38E-03 AP 04 33894 12/31/96 Ag-110M 1.98E-05 3.22E-04 1.23E-03 AP 04 33894 12/31/96 Ba-140 -7.03E-03 4.27E-03 2.29E-02 AP 04 33894 12/31/96 Be-7 9.33E-02 8.97E-03 1.96E-02

AP 04 33894 12/31/96 Ce-141 4.12E-04 5.98E-04 1.88E-03 AP 04 33894 12/31/96 Ce-144 -5.89E-05 7.23E-04 2.38E-03 AP 04 33894 12/31/96 Co-57 -8.15E-05 9.62E-05 3.27E-04 AP 04 33894 12/31/96 Co-58 -7.26E-05 2.99E-04 1.29E-03 l AP 04 33894 12/31/96 Co-60 1.28E-04 1.86E-04 7.37E-04 AP 04 33894 12/31/96 Cr-51 -7.72E-03 5.65E-03 2.20E-02 l AP 04 33894 12/31/96 Cs-134 -1.59E-04 1.85E-04 7.49E-04 AP 04 33894 12/31/96 Cs-137 -4.08E-05 1.87E-04 7.39E-04 AP 04 33894 12/31/96 Fe-59 -6.52E-04 1.14E-03 5.58E-03 AP 04 33894 12/31/96 I-131 9.86E-03 1.46E-02 4.91E-02 AP 04 33894 12/31/96 K-40 -2.57E-03 3.35E-03 1.37E-02 AP 04 33894 12/31/96 Mn-54 6.15E-04 2.18E-04 5.40E-04 AP 04 33894 12/31/96 Ru-103 -9.85E-05 5.83E-04 2.21E-03 AP 04 33894 12/31/96 Ru-106 -1.83E-03 1.65E-03 7.13E-03 AP 04 33894 12/31/96 Sb-124 1.20E-03

-8.46E-04 5.54E-03 AP 04 33894 12/31/96 Se-75 -3.48E-05 2.33E-04 8.34E-04 AP 04 33894 12/31/96 Th-232 1.97E-04 6.98E-04 2.64E-03 AP 04 33894 12/31/96 Zn-65 -2.88E-04 6.11E-04 2.51E-03 AP 04 33894 12/31/96 Zr-95 -1.97E-04 8.52E-04 3.39E-03 AP 05 33895 01/02/97 Ag-110M 2.05E-04 3.82E-04 1.36E-03 AP 05 33895 01/02/97 Ba-140 7.12E-03 4.68E-03 1.46E-02 AP 05 33895 01/02/97 Be-7 7.77E-02 7.59E-03 1.44E-02

AP 05 33895 01/02/97 Ce-141 -9.35E-05 5.76E-04 1.90E-03 AP 05 33895 01/02/97 Ce-144 -7.27E-04 6.41E-04 2.26E-03 AP 05 33895 01/02/97 Co-57 -7.69E-05 8.49E-05 2.94E-04 i

AP 05 33895 01/02/97 Co-58 -7.12E-05 4.06E-04 1.64E-03 AP 05 33895 01/02/97 Co-60 9.03E-05 2.85E-04 1.12E-03 AP 05 33895 01/02/97 Cr-51 -5.89E-03 5.45E-03 2.0BE-02 AP 05 33895 01/02/97 Cs-134 5.48E-04 2.56E-04 6.45E-04

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

- - - . _ _ - . .- - - - - . -_ -- _ _ - . . ~ . . - . _ . .

I l l

Seabrook Nuclear Power Station I

Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC l TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m) (pCi/cu.m)

AP 05 33895 01/02/97 Cs-137 -1.66E-04 1.90E-04 7.90E-04 l

AP 05 33895 01/02/97 Fe-59 2.88E-04 1.29E-03 5.43E-03 AP 05 33895 01/02/97 2.13E-02 I-131 1.10E-02 3.33E-02 AP 05 33895 01/02/97 K-40 -5.13E-04 3.41E-03 1.33E-02 AP 05 33895 01/02/97 Mn-54 1.03E-04 1.99E-04 7.29E-04 AP 05 33895 01/02/97 Ru-103 3.52E-04 5.60E-04 2.00E-03 AP 05 33895 01/02/97 Ru-106 7.83E-04 1.84E-03 6.82E-03 AP 05 33895 01/02/97 Sb-124 7.73E-04 1.32E-03 5.04E-03 AP 05 33895 01/02/97 Se-75 1.72E-04 2.45E-04 8.21E-04 AP 05 33895 01/02/97 Th-232 4.93E-04 7.74E-04 2.77E-03 AP 05 33895 01/02/97 Zn-65 2.85E-04 5.33E-04 2.01E-03 AP 05 33895 01/02/97 Zr-95 7.30E-06 8.44E-04 3.29E-03 AP 06 33896 12/31/96 Ag-110M -2.12E-05 2.63E-04 1.08E-03 AP 06 33896 12/31/96 Ba-140 1.16E-02 5.74E-03 1.53E-02 AP 06 33896 12/31/96 Be-7 8.38E-02 8.38E-03 1.72E-02

AP 06 33896 12/31/96 Ce-141 -1.57E-04 6.78E-04 2.23E-03 AP 06 33896 12/31/96 Ce-144 1.46E-03 8.48E-04 2.50E-03 AP 06 33896 12/31/96 Co-57 9.97E-05 9.72E-05 3.00E-04 AP 06 33896 12/31/96 Co-58 -2.29E-04 2.87E-04 1.35E-03 AP 06 33896 12/31/96 Co-60 2.65E-04

-5.49E-05 1.14E-03 AP 06 33896 12/31/96 Cr-51 0.00E+00 6.52E-03 2.31E-02 AP 06 33896 12/31/96 Cs-134 -1.86E-04 2.00E-04 8.14E-04 AP 06 33896 12/31/96 Cs-137 1.38E-04 1.69E-04 6.12E-04 AP 06 33896 12/31/96 Fe-59 1.28E-04 1.95E-03 7.94E-03 i AP 06 33896 12/31/96 I-131 -5.17E-03 1.26E-02 4.73E-02 l AP 06 33896 12/31/96 K-40 1.94E-03 3.93E-03 1.43E-02 i AP 06 33896 12/31/96 Mn-54 2.64E-04 2.26E-04 7.59E-04 ,

l AP 06 33896 12/31/96 Ru-103 9.11E-04 5.96E-04 1.96E-03 I

AP 06 33896 12/31/96 Ru-106 0.00E+00 1.92E-03 7.43E-03 I l AP 06 33896 12/31/96 Sb-124 -4.56E-04 1.37E-03 5.98E-03 AP 06 33896 12/31/96 Se-75 -3.77E-04 2.90E-04 1.08E-03 l AP 06 33896 12/31/96 Th-232 -1.09E-03 7.19E-04 3.23E-03 i AP 06 33896 12/31/96 Zn-65 -8.72E-05 6.31E-04 2.53E-03 AP 06 33896 12/31/96 Zr-95

-2.25E-04 7.33E-04 3.05E-03 l AP 07 33897 12/31/96 Ag-110M -7.48E-05 3.19E-04 1.28E-03 AP 07 33897 12/31/96 Ba-140 2.57E-03 6.50E-03 2.50E-02 AP 07 33897 12/31/96 Be-7 5.83E-02 7.78E-03 1.99E-02

l l

AP 07 33897 12/31/96 Ce-141 8.15E-04 6.35E-04 1.93E-03 AP 07 33897 12/31/96 Ce-144 9.55E-05 7.66E-04 2.49E-03 AP 07 33897 12/31/96 Co-57 0.00E+00 9.05E-05 2.99E-04 i AP 07 33897 12/31/96 Co-58 -1.89E-04 5.02E-04 2.03E-03 AP 07 33897 12/31/96 Co-60 -2.96E-04 2.57E-04 1.22E-03 AP 07 33897 12/31/96 Cr-51 2.64E-03 6.39E-03 2.20E-02 AP 07 33897 12/31/96 Cs-134 -3.74E-05 1.87E-04 7.29E-04

{ AP 07 33897 12/31/96 Cs-137 -3.53E-04 2.49E-04 1.04E-03 I

(

AP 07 33897 12/31/96 Fe-59 2.70E-03 2.28E-03 7.98E-03 AP 07 33897 12/31/96 I-131 9.75E-03 1.52E-02 5.17E-02 AP 07 33897 12/31/96 K-40 -2.87E-03 4.37E-03 1.71E-02 AP 07 33897 12/31/96 Mn-54 2.10E-04 2.07E-04 7.11E-04

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

l l

. .. . - - . - - _ - - . . - . - . . - _ - . _ . . - . - _ - - . - . ~ , . ._ .

! l l !

Seabrook Nuclear Power Station i Radiological Environmental Monitoring Data )

(January - December 1996) :

SAMPLE CONC. STD DEV. MDC l TYPE STA. LSN END DATE NUCLIDE

................................................................._).(pCi/cu.m) (pCi/cu.m) (pCi/cu.m AP 07 33897 12/31/96 Ru-103 -5.05E-04 6.65E-04 2.61E-03 AP 07 33897 12/31/96 Ru-106 5.77E-03 2.02E-03 5.40E-03 i AP 07 33897 12/31/96 Sb-124 1.42E-03 1.37E-03 4.87E-03 !

AP 07 33897 12/31/96 Se-75 2.21E-04 2.95E-04 9.81E-04 AP 07 33897 12/31/96 Th-232 -8.19E-04 8.21E-04 3.42E-03 l AP 07 33897 12/31/96 Zn-65 -3.12E-04 6.61E-04 2.72E-03 !

AP 07 33897 12/31/96 1.41E-04 Zr-95 7.30E-04 2.89E-03 '

AP 08 33898 12/31/96 Ag-110M 2.04E-04 3.89E-04 1.39E-03 j

AP 08 33898 12/31/96 Ba-140 -1.67E-03 3.37E-03 1.80E-02 i AP 08 33898 12/31/96 Be-7 5.70E-02 8.51E-03 2.27E-02

AP 08 33898 12/31/96 Ce-141 7.99E-04 7.00E-04 I 2.14E-03 AP 08 33898 12/31/96 Ce-144 2.88E-04 8.93E-04 2.84E-03 AP 08 33898 12/31/96 Co-57 3.23E-05 1.07E-04 3.42E-04 AP 08 33898 12/31/96 Co-58 7.61E-04 4.58E-04 1.52E-03 :

AP 08 33898 12/31/96 Co-60 1.98E-05 3.03E-04 1.23E-03 AP 08 33898 12/31/96 Cr-51 7.87E-03 7.81E-03 2.55E-02 AP 08 33898 12/31/96 Cs-134 1.51E-04 2.32E-04 8.23E-04 ;

AP 08 33898 12/31/96 Cs-137 3.10E-04 2.22E-04 7.38E-04 !

AP 08 33898 12/31/96 Fe-59 6.50E-04 1.75E-03 7.00E-03 ,

AP 08 33898 12/31/96 I-131 0.00E+00 1.47E-02 5.27E-02 I AP 08 33898 12/31/96 K-40 1.43E-03 4.31E-03 1.57E-02 AP 08 33898 12/31/96 Mn-54 -4.87E-04 2.68E-04 1.15E-03 3 AP 08 33898 12/31/96 Ru-103 5.41E-04 7.09E-04 2.49E-03 AP 08 33898 12/31/96 Ru-106 -4.15E-04 2.23E-03 8.60E-03

! AP 08 33898 12/31/96 Sb-124 3.09E-04 1.56E-03 6.22E-03 AP 08 33898 12/31/96 Se-75 -2.22E-04 3.15E-04 1.13E-03 AP 08 33898 12/31/96 Th-232 8.24E-04 1.21E-03 4.18E-03 t AP 08 33898 12/31/96 Zn-65 -3.72E-04 1.55E-03 6.0BE-03 AP 08 33898 12/31/96 Zr-95 7.42E-04 9.31E-04 3.40E-03 l

t i

i 1

4

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

I l

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996) i SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m)

.. __ ......._......._........._______ ..______________..(pCi/cu.m) (pCi/cu.m)

Air Particulates AP 01 27222 01/02/96 GR-B 2.31E-02 1.57E-03 3.55E-03

AP 02 27223 01/02/96 GR-B 2.03E-02 1.48E-03 3.45E-03

AP 03 27224 01/02/96 GR-B 2.50E-02 1.77E-03 4.01E-03

AP 04 27225 01/02/96 AP GR-B 2.42E-02 1.54E-03 3.45E-03

05 27226 01/02/96 GR-B 2.50E-02 1.72E-03 3.92E-03

AP 06 27227 01/02/96 GR-B 2.30E-02 1.78E-03 4.19E-03

AP 07 27228 01/02/96 GR-B 2.39E-02 1.60E-03 3.59E-03

AP 08 27229 01/02/96 GR-B 1.67E-02 1.49E-03 3.66E-03

AP 01 27397 01/09/96 GR-B 3.57E-02 1.73E-03 3.31E-03

AP 02 27398 01/09/96 GR-B 3.55E-02 1.66E-03 3.14E-03

AP 03 27399 01/09/96 GR-B AP 04 4.01E-02 1.72E-03 3.11E-03

27400 01/09/96 GR-B 3.71E-02 1.51E-03 2.67E-03

AP 05 27401 01/09/96 GR-B 4.14E-02 1.78E-03 3.17E-03

AP 06 27402 01/09/96 GR-B 3.54E-02 AP 1.74E-03 3.32E-03

07 27403 01/09/96 GR-B 3.54E-02 1.59E-03 2.97E-03

t I

AP OB 27404 01/09/96 GR-B 3.75E-02 1.87E-03 3.67E-03

I AP 01 27562 01/17/96 GR-B 1.29E-02 1.26E-03 3.19E-03

AP 02 27563 01/17/96 GR-B 2.24E-02 AP 1.38E-03 3.05E-03

03 27564 01/17/96 GR-B 1.93E-02 1.59E-03 3.83E-03

AP 04 27565 01/17/96 GR-B 2.52E-02 AP 1.48E-03 3.24E-03

05 27566 01/17/96 GR-B 2.40E-02 1.41E-03 3.05E-03

AP 06 27567 01/17/96 GR-B 2.29E-02 AP 1.45E-03 3.21E-03

07 27568 01/17/96 GR-B 2.34E-02 1.60E-03 3.67E-03

AP 08 27569 01/17/96 GR-B 1.88E-02 1.54E-03 3.73E-03

AP 01 27695 01/23/96 GR-B 1.79E-02 AP 1.57E-03 3.80E-03

02 27696 01/23/96 GR-B 1.92E-02 1.56E-03 3.67E-03

AP 03 27668 01/23/96 GR-B 1.88E-02 AP 1.75E-03 4.24E-03

04 27669 01/23/96 GR-B 1.84E-02 1.52E-03 3.56E-03

AP 05 27670 01/23/96 GR-B 1.92E-02 AP 1.57E-03 3.69E-03

06 27671 01/24/96 GR-B 1.88E-02 1.42E-03 3.26E-03

AP 07 27672 01/23/96 GR-B 1.66E-02 AP 1.60E-03 3.91E-03

1 08 27673 01/23/96 GR-B 1.69E-02 1.57E-03 3.82E-03 * !

AP 01 27785 01/31/96 GR-B 1.81E-02 1.33E-03 3.07E-03

AP 02 27786 01/31/96 GR-B 1.90E-02 1.31E-03 2.97E-03

AP 03 27787 01/31/96 GR-B 1.67E-02 1.44E-03 3.51E-03

AP 04 27788 01/31/96 GR-B 1.98E-02 1.29E-03 2.90E-03

AP 05 27789 01/31/96 GR-B 1.63F-02 1.26E-03 2.96E-03

AP 06 27790 01/31/96 GR-B 1.67E-02 1.45E-03 3.56E-03

AP 07 27791 01/31/96 GR-B 1.59E-02 1.28E-03 3.08E-03

AP 08 27792 01/31/96 GR-B 1.72E-02 1.36E-03 3.23E-03

1 AP 01 27865 02/07/96 GR-B 2.61E-02 1.57E-03 3.28E-03

AP 02 27866 02/07/96 GR-B 2.93E-02 1.54E-03 3.07E-03

AP 03 27867 02/07/96 GR-B 2.96E-02 1.64E-03 3.28E-03 *

AP 04 27868 02/07/96 GR-B 3.22E-02 1.55E-03 2.94E-03 *

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

. _ . ~

. - . .~ . - . . - - . _ _ - _ - . .- . - - . . --. -

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m)

...... __________....._____.... ______.__ .. ______ ........__..._____(pCi/cu.m) ________

AP 05 27869 02/07/96 GR-B 3.24E-02 AP 1.61E-03 3.12E-03

06 27870 02/07/96 GR-B 2.74E-02 1.61E-03 3.31E-03

AP 07 27871 02/07/96 GR-B 3.06E-02 1.65E-03 3.32E-03

AP 08 27872 02/07/96 GR-B 2.73E-02 1.52E-03 3.10E-03

AP 01 27973 02/14/96 GR-B 1.94E-02 1.48E-03 3.44E-03

AP 02 27974 02/14/96 GR-B 2.29E-02 1.52E-03 3.39E-03

AP 03 27975 02/14/96 GR-B 2.03E-02 1.58E-03 3.73E-03

AP 04 27976 02/14/96 GR-B 2.18E-02 1.45E-03 3.23E-03

AP 05 27977 02/14/96 GR-d 1.83E-02 1.47E-03 3.45E-03

AP 06 27978 02/14/96 GR-B 2.33E-02 1.55E-03 3.45E-03 *

AP 07 27979 02/14/96 GR-B 2.54E-02 1.59E-03 3.48E-03

AP 08 27980 02/14/96 GR-B 2.57E-02 1.56E-03 3.39E-03

AP 01 28028 02/21/96 GR-B 1.19E-02 1.29E-03 3.26E-03

AP 02 28029 02/21/96 GR-B 1.29E-02 1.29E-03 3.22E-03

AP 03 28030 02/21/96 GR-B 1.40E-02 1.44E-03 3.60E-03

AP 04 28031 02/21/96 GR-B 1.40E-02 1.25E-03 3.03E-03

AP 05 28032 02/21/96 GR-B 1.90E-02 1.42E-03 3.25E-03

AP 06 28033 02/21/96 GR-B 1.54E-02 1.38E-03 3.30E-03

AP 07 28034 02/21/96 GR-B 1.80E-02 1.42E-03 3.32E-03

AP 08 28035 02/21/96 GR-B 1.55E-02 1.34E-03 3.19E-03

AP 01 28157 02/28/96 GR-B 9.10E-03 1.31E-03 3.60E-03

AP 02 28158 02/28/96 GR-B 1.39E-02 1.45E-03 3.70E-03

AP 03 28159 02/28/96 GR-B 1.21E-02 1.56E-03 4.17E-03

AP 04 28160 02/28/96 GR-B 1.21E-02 1.32E-03 3.42E-03

AP 05 28161 02/28/96 GR-B 1.03E-02 1.36E-03 3.61E-03

AP 06 28162 02/28/96 GR-B 1.41E-02 1.43E-03 3.62E-03

i AP 07 28163 02/28/96 GR-B 1.39E-02 1.42E-03 3.64E-03

AP 08 28164 02/28/96 GR-B 1.29E-02 1.41E-03 3.63E-03

AP 01 28207 03/05/96 GR-B 1.92E-02 1.67E-03 4.11E-03

AP 02 28208 03/05/96 GR-B 1.96E-02 1.68E-03 4.10E-03

AP 03 28209 03/05/96 GR-B 2.00E-02 1.46E-03 3.41E-03

AP 04 28210 03/05/96 GR-B 2.03E-02 1.44E-03 3.34E-03

AP 05 28211 03/05/96 GR-B 2.30E-02 1.73E-03 4.07E-03

AP 06 28212 03/05/96 GR-B 2.16E-02 1.74E-03 4.16E-03

l AP 07 28213 03/05/96 GR-B 1.88E-02 1.69E-03 4.19E-03

AP 08 28214 03/05/96 GR-B 2.22E-02 1.72E-03 4.08E-03

AP 01 28319 03/13/96 GR-B 2.39E-02 1.40E-03 2.95E-03

AP 02 28320 03/13/96 GR-B 2.52E-02 1.42E-03 2.92E-03

AP 03 28321 03/13/96 GR-B 2.36E-02 1.45E-03 3.16E-03

AP 04 28322 03/13/96 GR-B 2.22E-02 1.41E-03 3.06E-03

AP 05 28323 03/13/96 GR-B 2.56E-02 1.42E-03 2.87E-03

AP 06 28324 03/13/96 GR-B 2.17E-02 1.38E-03 2.97E-03

AP 07 28325 03/13/96 GR-B 2.59E-02 1.46E-03 2.99E-03

AP 08 28326 03/13/96 GR-B 2.51E-02 1.40E-03 2.89E-03 *

)

j

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC.

TYPE STD DEV. MDC STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m)

______________________________________________________________________(pCi/cu.m)

AP 01 28482 03/19/96 GR-B 1.90E-C2 1.64E-03 3.96E-03

AP 02 28483 03/19/96 GR-B 1.82E-02 1.66E-03 4 09E-03

AP 03 28484 03/20/96 GR-B 2.29E-02 AP 1.54E-03 3.46E-03

04 28485 03/20/96 GR-B 1.81E-02 1.42E-03 3.31E-03

AP 05 28486 03/19/96 GR-B 2.98E-02 1.81E-03 3.96E-03

AP 06 28487 03/19/96 GR-B 2.96E-02 1.82E-03 3.99E-03

AP 07 28488 03/19/96 GR-B 2.56E-02 1.76E-03 4.01E-03

AP 08 28489 03/19/96 GR-B 2.26E-02 1.72E-03 4.01E-03

AP 01 28565 03/27/96 GR-B 1.33E-02 1.25E-03 3.10E-03

AP 02 28566 03/27/96 GR-B 1.64E-02 1.34E-03 3.20E-03

AP 03 28567 03/27/96 GR-B 1.61E-02 1.42E-03 3.47E-03

AP 04 28568 03/27/96 GR-B 1.72E-02 1.40E-03 3.34E-03

AP 05 28569 03/27/96 GR-B 1.47E-02 1.27E-03 3.10E-03

AP 06 28570 03/27/96 GR-B 1.55E-02 1.30E-03 3.13E-03

AP 07 28571 03/27/96 GR-B 1.61E-02 1.31E-03 3.13E-03

AP 08 28572 03/27/96 GR-B 1.59E-02 1.30E-03 3.12E-03

AP 01 28685 04/03/96 GR-B 2.55E-02 1.58E-03 3.43E-03

AP 02 28686 04/03/96 GR-B 2.62E-02 1.60E-03 3.48E-03

AP 03 28687 04/03/96 GR-B 3.51E-02 1.71E-03 3.39E-03

AP 04 28688 04/03/96 GR-B 2.78E-02 1.55E-03 3.22E-03

AP 05 28689 04/03/96 GR-B 2.80E-02 1.60E-03 3.38E-03

AP 06 28690 04/03/96 GR-B 2.61E-02 1.62E-03 3.49E-03

AP 07 28691 04/03/96 GR-B 2.63E-02 1.60E-03 3.48E-03

AP 08 28692 04/03/96 GR-B 2.66E-02 1.59E-03 3.42E-03

AP 01 28812 04/10/96 GR-B 8.76E-03 1.21E-03 3.25E-03

AP 02 28813 04/10/96 GR-B 1.22E-02 1.32E-03 3.35E-03

AP 03 28814 04/10/96 GR-B 1.17E-02 1.28E-03 3.27E-03

AP 04 28815 04/10/96 GR-B 1.17E-02 1.22E-03 3.06E-03

AP 05 28816 04/09/96 GR-B 1.41E-02 1.50E-03 3.76E-03 * !

AP 06 28817 04/09/96 GR-B 1.07E-02 1.47E-03 3.91E-03

AP 07 28818 04/09/96 GR-B 1.40E-02 1.51E-03 3.84E-03

AP 08 28819 04/10/96 GR-B 1.11E-02 1.26E-03 3.24E-03

AP 01 28977 04/17/96 GR-B 7.68E-03 1.30E-03 3.54E-03

AP 02 28978 04/17/96 GR-B 9.23E-03 1.40E-03 3.79E-03

AP 03 28979 04/17/96 GR-B 1.58E-02 1.47E-03 3.65E-03

AP 04 28980 04/17/96 GR-B 1.05E-02 1.30E-03 3.41E-03

AP 05 28981 04/17/96 GR-B 1.02E-02 1.22E-03 3.15E-03

AP 06 28982 04/17/96 GR-B 1.14E-02 1.21E-03 3.10E-03

AP 07 28983 04/17/96 GR-B 1.04E-02 1.21E-03 3.15E-03

AP 08 28984 04/17/96 GR-B 1.30E-02 1.39E-03 3.53E-03

AP 01 29057 04/24/96 GR-B 1.61E-02 1.37E-03 3.26E-03

AP 02 29058 04/24/96 GR-B 1.47E-02 1.59E-03 4.04E-03

AP 03 29059 04/24/96 GR-B 1.19E-02 9.69E-04 2.27E-03

AP 04 29060 04/24/96 GR-B 1.47E-02 1.2BE-03 3.09E-03

AP 05 29061 04/24/96 GR-B 1.57E-02 1.54E-03 3.81E-03

AP 06 29062 04/24/96 GR-B 1.79E-02 1.45E-03 3.42E-03 *

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

h 6

i i

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data j (January - December 1996) I SAMPLE !

CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE

.---------------------------------------------(pCi/cu.m)

(pCi/cu.m) (pCi/cu.m)

j AP 07 29063 04/24/96 GR-B AP 1.22E-02 1.30E-03 3.28E-03 * !

08 29064 04/24/96 GR-B 1.32E-02 1.31E-03 l 3.26E-03

i AP 01 29225 04/30/96 GR-B 1.25E-02 1.52E-03 4.03E-03

AP 02 29226 04/30/96 GR-B 1.49E-02 1.52E-03 3.89E-03

AP 06 29230 04/30/96 GR-B 1.92E-02 1.65E-03 4.04E-03

AP 03 29227 05/01<36 GR-B 1.26E-02 1.25E-03 3.16E-03

AP 04 29228 05/01/96 GR-B l

1.58E-02 1.38E-03 3.38E-03

AP 05 29229 05/01/96 GR-B 1.92E-02 1.44E-03 3.38E-03

AP 07 29231 05/01/96 l GR-B 1.66E-02 1.45E-03 3.56E-03

AP 08 29232 04/30/96 GR-B 1.63E-02 1.59E-03 4.02E-03

i i

AP 01 29330 05/08/96 GR-B i AP 1.54E-02 1.27E-03 3.04E-03 * '

02 29331 05/08/96 GR-B 1.25E-02 1.32E-03 3.38E-03

AP 03 29332 05/08/96 GR-B AP 1.40E-02 1.31E-03 3.25E-03

04 29333 05/'08/96 GR-B 1.54E-02 1.36E-03 3.28E-03

AP 05 29334 05/08/96 GR-B 1.76E-02 1.50E-03 3.61E-03

AP 06 29335 05/08/96 GR-B 1.72E-02 1.34E-03 3.16E-03

AP 07 29336 05/08/96 GR-B AP 1,. 61 E- 02 1.47E-03 3.59E-03

08 29337 05/08/96 GR-B 1.55E-02 1.2BE-03 3.07E-03

i AP 01 29379 05/15/96 GR-B 1.41E-02 1.373-03 3.42E-03

i AP 02 29380 05/15/96 GR-B 1.51E-02 1.51E-03 3.83E-03

AP 03 29381 05/15/96 GR-B 8.72E-03 1.17E-03 3.11E-03

AP 04 29382 05/15/96 GR-B 1.36E-02 1.31E-03 3.27E-03

AP 05 29383 05/15/96 GR-B 1.42E-02 1.37E-03 3.39E-03 * !

AP 06 29384 05/15/96 GR-B 1.36E-02 1.38E-03 3.44E-03

AP 07 29385 05/15/96 GR-B 1.24E-02 1.31E-03 3.36E-03

AP 08 29386 05/15/96 GR-B 1.34E-02 1.36E-03 3.42E-03

i AP 01 29504 05/22/96 GR-B 1.13E-02 1.32E-03 3.51E-03

AP 02 29505 05/22/96 GR-B 1.34E-02 1.57E-03 4.10E-03

AP 03 29506 05/22/96 GR-B 9.92E-03 1.21E-03 3.23E-03

AP 04 29507 05/22/96 GR-B 1.22E-02 1.32E-03 3.39E-03

AP 05 29508 05/22/96 GR-B 1.29E-02 1.33E-03 3.36E-03

i AP 06 29509 05/22/96 GR-B 1.15E-02 1.34E-03 3.53E-03 *

! AP 07 29510 05/22/96 GR-B 1.22E-02 1.39E-03 3.57E-03

AP 08 29511 05/22/96 GR-B 1.22E-02 1.37E-03 3.54E-03

AP 01 29679 05/29/96 GR-B 1.35E-02 AP 1.35E-03 3.39E-03

i 02 29680 05/29/96 GR-B 1.52E-02 1.44E-03 3.53E-03

AP 03 29681 05/29/96 GR-B 9.26E-03 1.23E-03 3.28E-03

AP 04 29682 05/29/96 GR-B 1.49E-02 1.36E-03 3.31E-03

AP 05 29683 05/29/96 GR-B 1.65E-02 1.37E-03 3.26E-03

AP 06 29684 05/29/96 GR-B 1.53E-02 1.39E-03 3.40E-03

AP 07 2.9685 05/29/96 GR-B 1,32E-02 1.35E-03 3.39E-03

AP 08 29686 05/29/96 GR-B 1.51E-02

' 1.39E-03 3.41E-03

i 4

AP 01 29761 06/05/96 GR-B 1.19E-02 1.35E-03 3.52E-03

AP U2 29762 06/05/96 GR-B 1.30E-02 1.36E-03 3.45E-03

i AP 03 29763 06/05/96 GR-B 1.20E-02 1.39E-03 3.64E-03

i 1

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

I f

_ - . _ - - - . - ~ - . - - _ _ - .. -. - - - _ - - . .--- - - . , -- -

h i

l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996) l SAMPLE CONC.

TYPE STD DEV. MDC

{ STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m) (pCi/cu.m) l l L i

AP 04 29764 06/05/96 GR-B 1.31E-02 1.36E-03 3.49E-03 *

! AP 05 29765 06/05/96 GR-B 1.26E-02 1.31E-03 3.36E-03

l AP 06 29766 06/05/96 GR-B 1.13E-02 1.36E-03 3.56E-03

AP 07 29767 06/05/96 GR-B 1.02E-02 1.34E-03 3.61E-03

r AP 08 29768 06/05/96 GR-B 1.13E-02 1.34E-03 3.54E-03

AP 01 29907 06/12/96 GR-B 1.57E-02 1.41E-03 3.45E-03

AP 02 29908 06/12/96 !

GR-B 1.61E-02 1.42E-03 3.42E-03

t l

AP 03 29909 06/12/96 GR-B 1.19E-02 1.39E-03 3.64E-03 * !

AP 04 29910 06/12/96 GR-B 1.43E-02 1.43E-03 3.54E-03

i AP 05 29911 06/12/96 GR-B 2.05E-02 1.46E-03 3.33E-03 * !

i AP 06 29912 06/12/96 GR-B 1.64E-02 1.44E-03 3.46E-03

I l AP 07 29913 06/12/96 GR-B 1.72E-02 1.45E-03 3.50E-03 *

) AP OB 29914 06/12/96 !

GR-B 1.60E-02 1.42E-03 3.47E-03

AP 01 30034 06/19/96 GR-B 1.69E-02 1.40E-03 3.40E-03

l I

AP 02 30035 06/19/96 GR-B 1.56E-02 1.41E-03 3.44E-03

AP 03 30036 06/19/96 GR-B 1.10E-02 1.35E-03 3.52E-03

I l AP 04 30037 06/19/96 GR-B 1.59E-02 1.40E-03 3.39E-03

30038 06/19/96 AP 05 ;

GR-B 1.78E-02 1.40E-03 3.31E-03

l AP 06 30039 06/19/96 GR-B 1.19E-02 1.35E-03 3.45E-03

I AP 07 30040 06/19/96 GR-B 1.36E-02 1.38E-03 3.45E-03

AP 08 30041 06/19/96 GR-B 1.14E-02 1.33E-03 3.42E-03

I i AP 01 30132 06/26/96 GR-B 9.05E-03 1.29E-03 3.50E-03

i AP 02 30133 06/26/96 GR-B 7.87E-03 1.29E-03 3.53E-03

AP 03 30134 06/26/96 GR-B 7.41E-03 1.30E-03 3.65E-03 *

! AP 04 30135 06/26/96 GR-B 7.36E-03 1.28E-03 3.60E-03

I AP 05 30136 06/26/96 GR-B 7.48E-03 1.23E-03 3.35E-03

AP 06 30137 06/26/96 GR-B 8.30E-03 1.31E-03 3.51E-03 * '

AP 07 30138 06/26/96 GR-B 8.16E-03 1.30E-03 3.54E-03

AP 08 30139 06/26/96 GR-B 6.27E-03 1.23E-03 3.51E-03

AP 01 30352 07/03/96 GR-B 1.02E-02 1.32E-03 3.48E-03

AP 02 30353 07/02/96 GR-B 1.33E-02 1.57E-03 4.08E-03

AP 03 30354 07/03/96 GR-B 1.21E-02 1.38E-03 3.57E-03

i AP 04 30355 07/03/96 GR-B 1.51E-02 1.41E-03 3.51E-03 * '

l AP 05 30356 07/03/96 GR-B 1.64E-02 1.42E-03 3.42E-03

AP 06 30357 07/03/96 GR-B 1.37E-02 1.38E-03 3.50E-03

AP 07 30358 07/03/96 GR-B 1.26E-02 1.38E-03 3.54E-03

AP 08 30359 07/03/96 GR-B 1.11E-02 1.34E-03 3.50E-03

AP 01 30419 07/09/96 GR-B 1.68E-02 1.49E-03 3.68E-03

AP 02 30420 07/09/96 GR-B 1.81E-02 1.38E-03 3.26E-03

AP 03 30421 07/09/96 GR-B 1.41E-02 1.50E-03 3.93E-03

AP 04 30422 07/09/96 GR-B 1.86E-02 1.53E-03 3.73E-03

AP 05 30423 07/09/96 GR-B 1.85E-02 1.52E-03 3.71E-03

AP 06 30424 07/09/96 GR-B 2.07E-02 1.60E-03 3.78E-03

AP 07 30425 07/09/96 GR-B 1.86E-02 1.54E-03 3.78E-03

AP 08 30426 07/09/96 GR-B 1.78E-02 1.51E-03 3.69E-03 *

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

1

- - - . .__ _ - - - - _ . _ - - _ . - ~ . _~ _- -

- - . - . -._ .-,u l Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE

.........................................................pCi/cu.m)(pCi/cu.m) ( (pCi/cu.m)

AP 01 30546 07/17/96 GR-B 1.26E-02 1.26E-03 3.24E-03

AP 02 30547 07/17/96 GR-B 1.45E-02 1.32E-03 3.25E-03

l AP 03 30548 07/17/96 GR-B 1.30E-02 1.34E-03 3.43E-03

i l

AP 04 30549 07/17/96 GR-B 1.35E-02 1.30E-03 3.32E-03

AP 05 30550 07/17/96 GR-B 1.57E-02 1.34E-03 3.25E-03

AP 06 30551 07/17/96 GR-B 1.47E-02 i AP 07 1.28E-03 3.16E-03

30552 07/17/96 GR-B 1.02E-02 1.22E-03 3.24E-03

AP 08 30553 07/17/96 GR-B 1.17E-02 1.24E-03 3.26E-03

AP 01 30702 07/24/96 GR-B i

1.53E-02 1.40E-03 3.52E-03

l AP 02 30703 07/24/96 GR-B 1.83E-02 1.48E-03 3. 5 8E-03

AP 03 30704 07/24/96 GR-B 1.12E-02 1.41E-03 3.75E-03

AP 04 30705 07/24/96 GR-B 1.57E-02 1.39E-03 3.48E-03

i AP 05 30706 07/22/96 GR-B 2.10E-02 2.06E-03 5.28E-03

i l AP 06 30707 07/24/96 GR-B 1.81E-02 1.47E-03 3.62E-03

AP 07 30708 07/24/96 GR-B 1.62E-02 1.47E-03 3.57E-03

AP 08 30709 07/24/96 GR-B 1.64E-02 1.42E-03 3.54E-03

AP 01 30845 07/31/96 GL-B 1.08E-02 AP 1.37E-03 3.74E-03

02 30846 07/31/96 CR-B 1.49E-02 1.44E-03 3.75E-03

AP 03 30847 07/31/96 GR-B 9.54E-03 1.50E-03 4.14E-03

l AP 04 30848 07/31/96 GR-B 1.08E-02 1.48E-03 3.96E-03

i AP 05 30849 07/31/96 GR-B 1.15E-02 1.57E-03 4.42E-03 *

! AP 06 30850 07/31/96 CR-B 1.60E-02 1.48E-03 3.76E-03

l AP 07 30851 07/31/96 GR-B 1.19E-02 1.42E-03 3.81E-03

l AP 08 30852 07/31/96 GR-B 1.04E-02 1.36E-03 3.76E-03 *

! AP 01 30918 08/07/96 GR-B 1.10E-02 1.37E-03 AP 3.65E-03

02 30919 08/07/96 GR-B 1.50E-02 1.42E-03 3.69E-03

AP 03 30920 08/07/96 GR-B 1.22E-02 1.41E-03 3.82E-03

AP 04 30921 08/07/96 GR-B 1.43E-02 1.39E-03 3.65E-03

AP 05 30922 08/07/96 GR-B 1.62E-02 1.44E-03 3.69E-03

AP 06 30923 08/07/96 GR-B 1.66E-02 1.49E-03 3.71E-03

AP 07 30924 08/07/96 GR-B 1.11E-02 1.35E-03 3.70E-03

AP 08 30925 08/07/96 GR-B 1. ORE-02 1.34E-03 3.68E-03

i AP 01 31049 08/13/96 GR-B 2.112-02 1.73E-03 4.06E-03 *

! AP 02 31050 08/13/96 GR-B 2.54E-02 1.87E-03 4.16E-03 *

! AP 03 31051 08/13/96 GR-B 1.71E-02 1.66E-03 4.00E-03

AP 04 31052 08/13/96 GR-B 2.30E-02 1.75E-03 3.96E-03

AP 05 31053 08/13/96 GR-B 2.81E-02 2.51E-03 5.94E-03

AP 06 31054 08/13/96 GR-B 2.49E-02 1.83E-03 4.09E-03

AP 07 31055 08/13/96 GR-B 2.02E-02 1.75E-03 4.10E-03

AP 08 31056 08/13/96 GR-B 2.22E-02 1.76E-03 4.08E-03

I

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

r l

. _ _ _ _ _ .._ ___ ____m. . ___ ._ _ . _ _ . . _ _ . . _

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m)

(pCi/cu.m) pCi/cu.m)

(

AP 01 31191 08/21/96 GR-B 2.18E-02 1.29E-03 2.94E-03

AP 02 31192 08/21/96 GR-B 2.62E-02 1.35E-03 2.99E-03

AP 03 31193 08/21/96 GR-B 1.89E-02 1.17E-03 2.73E-03

AP 04 31194 08/21/96 GR-B 2.47E-02 1.27E-03 2.70E-03

AP 05 31195 08/21/96 GR-B 2.39E-02 1.30E-03 2.86E-03

AP 06 31196 08/21/96 GR-B 2.51E-02 1.34E-03 2.96E-03

AP 07 31197 08/21/96 GR-B 1.84E-02 1.29E-03 2.98E-03

AP 08 31198 08/21/96 GR-B 2.12E-02 1.30E-03 2.96E-03

AP 01 31322 08/28/96 GR-B 2.89E-02 1.68E-03 3.66E-03

AP 02 31323 08/28/96 GR-B 3.33E-02 1.78E-03 3.75E-03

AP 03 31324 08/28/96 GR-B 2.84E-02 1.66E-03 3.59E-03

AP 04 31325 08/28/96 GR-B 3.07E-02 1.70E-03 3.60E-03

AP 05 31326 08/28/96 GR-B 3.27E-02 1.70E-03 3.57E-03

AP 06 31327 08/28/96 GR-B 3,15E-02 1.75E-03 3.68E-03

AP 07 31328 08/28/96 GR-B 2.76E-02 1.67E-03 3.73E-03

AP 08 31329 08/28/96 GR-B 2.82E-02 1.70E-03 3.67E-03

AP 01 31464 09/04/96 GR-B 1.89E-02 1.48E-03 3.57E-03

AP 02 31465 09/04/96 GR-B 2.45E-02 1.64E-03 3.70E-03

AP 03 31466 09/04/96 GR-B 2.08E-02 1.44E-03 3.30E-03

AP 04 31467 09/04/96 GR-B 2.44E-02 1.52E-03 3.30E-03

AP 05 31468 09/04/96 GR-B 2.21E-02 1.55E-03 3.51E-03

AP 06 31469 09/04/96 GR-B 2.34E-02 1.58E-03 3.63E-03

AP 07 31470 09/04/96 GR-B 2.30E-02 1.61E-03 3.68E-03

AP 08 31471 09/04/96 GR-B 2.04E-02 1.53E-03 3.58E-03

AP 01 31541 09/11/96 GR-B 1.87E-02 1.50E-03 3.56E-03

AP 02 31542 09/11/96 GR-B 2.39E-02 1.61E-03 3.68E-03

AP 03 31543 09/11/9C GR-B 1.95E-02 1.45E-03 3.43E-03

AP 04 31544 09/11/96 GR-B 2.11E-02 1.47E-03 3.41E-03

AP 05 31545 09/11/96 GR-B 2.11E-02 1.50E-03 3.50E-03

AP 06 31546 09/11/96 GR-B 2.20E-02 1.54E-03 3.59E-03

AP 07 31547 09/11/96 GR-B 1.66E-02 1.46E-03 3.61E-03

AP 08 31548 09/11/96 GR-B 1.83E-02 1.48E-03 3.58E-03

AP 01 31669 09/18/96 GR-B 6.36E-03 1.20E-03 3.52E-03

AP 02 31670 09/18/96 GR-B 8.70E-03 1.28E-03 3.65E-03

AP 03 31671 09/18/96 GR-B 9.18E-03 1.18E-03 3.28E-03

AP 04 31672 09/18/96 GR-B 7.28E-03 1.16E-03 3.29E-03

AP 05 31673 09/18/96 GR-B 7.91E-03 1.22E-03 3.36E-03

l AP 06 31674 09/18/96 GR-B 1.01E-02 1.29E-03 3.53E-03

AP 07 31675 09/18/96 GR-B 9.98E-03 1.30E-03 3.56E-03

AP 08 31676 09/18/96 GR-B 7.92E-03 1.24E-03 3.53E-03

AP 01 31782 09/25/96 GR-B 2.44E-02 1.52E-03 3.33E-03

AP 02 31783 09/25/96 GR-B 2.G8E-02 1.58E-03 3.42E-03

AP 03 31784 09/25/96 GR-B 2.08E-02 1.45E-03 3.23E-03

i AP 04 31785 09/25/96 GR-B 2.36E-02 1.49E-03 3.19E-03

f AP 05 31786 09/25/96 GR-B 2.61E-02 1.49E-03 3.16E-03 *

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station i Radiological Environmental Monitoring Data (January - December 1996) ,

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN {

END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m) (pCi/cu.m) i AP 06 31787 09/25/96 GR-B 2.46E-02 1.53E-03 3.34E-03

AP 07 31788 09/25/96 GR-B 2.19E-02 1.48E-03 3.30E-03

AP 08 31789 09/25/96 GR-B 2.05E-02 1.45E-03 3.35E-03

AP 01 31921 10/02/96 GR-B 1.60E-02 1.63E-03 4.26E-03

AP 02 31922 10/02/96 GR-B 1.57E-02 1.41E-03 3.62E-03

AP 03 31923 10/02/96 GR-B 1.55E-02 1.33E-03 3.34E-03 * '

AP 04 31924 10/02/96 GR-B 1.66E-02 1.38E-03 3.37E-03

AP 05 31925 10/02/96 GR-B 1.72E-02 1.41E-03 3.46E-03

AP 06 31926 10/02/96 GR-B 1.48E-02 1.39E-03 3.60E-03

AP 07 31927 10/02/96 GR-B 1.51E-02 1.41E-03 3.66E-03

AP 08 31928 10/02/96 GR-B 1.30E-02 1,34E-03 3.58E-03

AP 01 32041 10/09/96 GR-B 7.49E-03 1.28E-03 3.55E-03

AP 02 32042 10/09/96 GR-B 1.43E-02 1.40E-03 3.60E-03

AP 03 32043 10/09/96 GR-B 1.02E-02 1.25E-03 3.31E-03

AP 04 32044 10/09/96 GR-B 1.50E-02 1.34E-03 3.36E-03

AP 05 32045 10/09/96 GR-B 1.24E-02 1.28E-03 3.33E-03

AP 06 32046 10/09/96 GR-B 1.35E-02 1.39E-03 3.58E-03

AP 07 32047 10/09/96 GR-B 1.05E-02 1.40E-03 3.59E-03

AP 08 32048 10/09/96 GR-B 1.05E-02 1.37E-03 3.79E-03

AP 01 32407 10/16/96 GR-B 1.97E-02 1.63E-03 4.18E-03

AP 02 32408 10/16/96 GR-B 2.43E-02 1.76E-03 4.34E-03

AP 03 32409 10/16/96 GR-B 2.12E-02 1.58E-03 3.96E-03

AP 04 32410 10/16/96 GR-B 2.04E-02 1.56E-03 3.96E-03

AP 05 32411 10/16/96 GR-B 2.24E-02 1.60E-03 3.97E-03

AP 06 32412 10/16/96 GR-B 2.11E-02 1.68E-03 4.29E-03

AP 07 32413 10/16/96 GR-B 2.00E-02 1.73E-03 4.43E-03

AP 09 32414 10/16/96 GR-B 1.94E-02 1.67E-03 4.20E-03

i AP 01 32483 10/23/96 GR-B 1.12E-02 1.29E-03 3.38E-03

AP 02 32484 10/23/96 GR-B 1.06E-02 1.35E-03 3.55E-03

AP 03 32485 10/23/96 GR-B 1.07E-02 1.24E-03 3.18E-03

1 l AP 04 32486 10/23/96 GR-B 1.27E-02 1.25E-03 3.17E-03

AP 05 32487 10/23/96 GR-B 1.24E-02 1.25E-03 3.15E-03

AP 06 32488 10/23/96 GR-B 1.19E-02 1.30E-03 3.35E-03

AP 07 32489 10/23/96 GR-B 1.25E-02 1.29E-03 3.28E-03

AP 08 32490 10/23/96 GR-B 1.32E-02 1.35E-03 3.41E-03

AP 01 32618 10/30/96 GR-B 1.78E-02 1.52E-03 3.77E-03

AP 02 32619 10/30/96 GR-B 1.89E-02 1.56E-03 3.94E-03

AP 03 32620 10/30/96 GR-B 1.71E-02 1.42E-03 3.53E-03

AP 04 32621 10/30/96 GR-B 1.73E-02 1.43E-03 3.50E-03

AP 05 32622 10/30/96 GR-B 1.78E-02 1.45E-03 3.60E-03

AP 06 32623 10/30/96 GR-B 2.24E-02 1.60E-03 3.81E-03

AP 07 32624 10/30/96 GR-B 1.70E-02 1.58E-03 3.83E-03

AP 08 32625 10/30/96 GR-B 1.53E-02 1.46E-03 3.80E-03

AP 01 32713 11/05/96 GR-B 2.0BE-02 1.90E-03 4.88E-03

AP 02 32714 11/05/96 GR-B 2.23E-02 1.98E-03 5.06E-03 *

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

I

_. _ . - -- . _. _- ~~- . - _ _ _ - _- . . _ ~- . _.- --- . . ._

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m)

..______________________________________________(pCi/cu.m) (pCi/cu.m)

AP 05 32717 11/05/96 GR-B AP 2.27E-02 1.82E-03 4.67E-03

07 32719 11/05/96 GR-B 2.07E-02 1.90E-03 5.04E-03

AP 03 32715 11/06/96 GR-B AP 2.11E-02 1.61E-03 4.12E-03

04 32716 11/06/96 GR-B 2.68E-02 AP 1.71E-03 4.12E-03

06 32718 11/06/96 GR-B 2.21E-02 1.72E-03 4.22E-03

AP 08 32720 11/06/96 GR-B 2.34E-02 1.69E-03 4.21E-03

AP 01 32895 11/13/96 GR-B 1.67E-02 1.51E-03 3.92E-03

AP 02 32896 11/13/96 GR-B 1.76E-02 1.52E-03 4.00E-03 *

! AP 03 32897 11/13/96 GR-B 1.46E-02 1.52E-03 4.13E-03

AP 04 32898 11/13/96 GR-B 2.00E-02 1.61E-03 4.15E-03

l AP 05 32899 11/13/96 GR-B 1.62E-02 1.41E-03 3.65E-03

l AP 06 32900 11/13/96 GR-B 1.45E-02 1.68E-03 4.57E-03

l AP 07 32901 11/13/96 GR-B 1.28E-02 1.43E-03 3.94E-03

AP 08 32902 11/13/96 GR-B 1.46E-02 1.66E-03 4.56E-03

AP 01 32979 11/20/96 GR-B 1.57E-02 1.61E-03 4.35E-03

AP 02 32980 11/20/96 GR-B 1.94E-02 1.68E-03 4.33E-03

l AP 03 32981 11/20/96 GR-B 1.44E-02 1.52E-03 3.98E-03

AP 04 32982 11/20/96 GR-B 2.04E-02 1.59E-03 3.9BE-03

AP 05 32983 11/20/96 GR-B 1.95E-02 1.58E-03 4.06E-03

AP 06 32984 11/20/96 GR-B 2.05E-02 1.71E-03 4.44E-03

AP 07 32985 11/20/96 GR-B 1.76E-02 1.68E-03 4.38E-03

AP 08 32986 11/20/96 GR-B 1.93E-02 1.69E-03 4.37E-03

I AP 01 33120 11/27/96 GR-B 1.74E-02 1.70E-03 4.45E-03

AP 02 33121 11/27/96 GR-B 2.24E-02 1.77E-03 4.48E-03

AP 03 33122 11/27/96 GR-B 1.50E-02 1.58E-03 4.19E-03

AP 04 33123 11/27/96 GR-B 2.02E-02 1.61E-03 4.08E-03

AP 05 33124 11/27/96 GR-B 1.91E-02 1.62E-03 4.13E-03

AP 06 33125 11/27/96 GR-B 1.60E-02 1.64E-03 4 'E-03

l AP 07 33126 11/27/96 GR-B 2.27E-02 1.77E-03 4.42E-03

AP 08 33127 11/27/96 GR-B 1.73E-02 1.68E-03 4.44E-03

AP 01 33194 12/04/96 GR-B 1.92E-02 1.51E-03 3.71E-03

AP 02 33195 12/04/96 GR-B -1.79E-02 1.49E-03 3.65E-03

AP 03 33196 12/04/96 GR-B 1.54E-02 1.36E-03 3.37E-03

AP 04 33197 12/04/96 GR-B 1.90E-02 1.45E-03 3.51E-03

AP 05 33198 12/04/96 GR-B 1.56E-02 1.35E-03 3.39E-03

AP 06 33199 12/04/96 GR-B 1.57E-02 1.45E-03 3.67E-03

AP 07 33200 12/04/96 GR-B 2.11E-02 1.53E-03 3.74E-03

AP 08 33201 12/04/96 GR-B 1.62E-02 1.44E-03 3.66E-03

I AP 01 33331 12/11/96 GR-B 1.83E-02 1.54E-03 3.88E-03

AP 02 33332 12/11/96 GR-B 2.09E-02 1.57E-03 3.79E-03

AP 03 33333 12/11/96 GR-B 1.27E-02 1.33E-03 3.54E-03

AP 04 33334 12/11/96 GR-B 1.95E-02 1.44E-03 3.47E-03 *

' AP 05 33335 12/11/96 GR-B 1.84E-02 1.45E-03 3.54E-03

AP 06 33336 12/11/96 GR-B 1.33E-02 1.43E-03 3.78E-03

4 AP 07 33337 12/11/96 GR-B 1.85E-02 1.51E-03 3 . .' 5 E- 0 3

AP 08 33338 12/11/96 GR-B 1.87E-02 1.71E-03 4.43E-03

I

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC.

TYPE STD DEV. MDC STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m)

(pCi/cu.m)

AP 01 33440 12/17/96 GR-B 6.25E-03 1.78E-03 5.33E-03

AP 02 33441 12/17/96 GR-B 9.22E-03 1.81E-03 5.40E-03

AP 03 33442 12/17/96 GR-B 8.59E-03 1.54E-03 4.59E-03

AP 04 33443 12/17/96 GR-B 7.89E-03 1.52E-03 4.52E-03

AP 05 33444 12/17/96 GR-B 8.43E-03 1.63E-03 4.77E-03

AP 06 33445 12/17/96 GR-B 8.21E-03 1.47E-03 4.33E-03

AP 07 33446 12/17/96 GR-B 7.74E-03 1.73E-03 5.11E-03

AP 08 33447 12/17/96 GR-B 7.71E-03 1.76E-03 5.19E-03

AP 01 33514 12/23/96 GR-B 2.66E-02 1.94E-03 4.51E-03

AP 02 33515 12/23/96 GR-B 2.54E-02 1.92E-03 4.51E-03

l AP 03 33516 12/23/96 GR-B 1.84E-02 1.64E-03 4.08E-03

l AP 04 33517 12/23/96 GR-B 2.98E-02 1.82E-03 4.01E-03

AP 05 33518 12/23/96 GR-B 2.92E-02 1.80E-03 3.96E-03

l AP 06 33519 12/23/96 GR-B 3.50E-02 2.2SE-03 4.97E-03

AP 07 33520 12/23/96 GR-B 2.39E-02 1.79E-03 4.22E-03

AP 08 33521 12/23/96 GR-B 2.58E-02 1.81E-03 4.18E-03

AP 01 33670 12/31/96 GR-B 3.44E-02 1.87E-03 4.12E-03

AP 02 33671 12/31/96 GR-B 3.10E-02 1.80E-03 3.96E-03

AP 03 33672 12/31/96 GR-B 3.61E-02 1.66E-03 3.49E-03

AP 04 33673 12/31/96 GR-B 3.86E-02 1.66E-03 3.39E-03

AP 05 30706 01/02/97 GR-B 3.18E-02 1.41E-03 2.88E-03

AP 06 33675 12/31/96 GR-B 3.19E-02 1.73E-03 3.74E-03

AP 07 33676 12/31/96 GR-B 3.38E-02 1.71E-03 3.69E-03

AP 08 33677 12/31/96 GR-B 3.52E-02 1.74E-03 3.70E-03

i 4

Radioactivity detected (i.e., Concentration > 3 Std. Deviations).

. _ _ _ _ _ _ _ _ . m _ _ _. ._ _ _ ._.__ ___ _ _____ _ _ , _ _ _ _ . . . ._ _ _ . . _ . __ ,_

l l

l i

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC.

TYPE STD DEV. MDC STA. LSN END DATE NUCLIDE (pCi/cu.m)

pCi/cu.m) (pCi/cu.m) (

Charcoal Filters 1

i CF 01 27214 01/02/96 I-131 3.30E-03 8.08E-03 2.99E-02 CF 02 27215 01/02/96 I-131 1.60E-03 7.35E-03 2.79E-02 CF 03 27216 01/02/96 I-131 -3.04E-09 1.13E-02 4.14E-02 CF 04 27217 01/02/96 I-131 1.38E-03 1.00E-02 3.64E-02 ;

i CF 05 27218 01/02/96 I-131 1.81E-02 1.09E-02 3.54E-02

( CF 06 27219 01/02/96 I-131 -3.26E-03 1.18E-02 4.38E-02 CF 07 27220 01/02/96 I-131 -4.81E-03 1.03E-02 3.90E-02 CF 08 27221 01/02/96 I-131 5.95E-03 1.19E-02 4.19E-02 CF 01 27389 01/09/96 I-131 7.59E-03 8.95E-03 3.10E-02 CF 02 27390 01/09/96 I-131 -2.30E-09 9.02E-03 3.29E-02 CF 03 27391 01/09/96 I-131 2.45E-03 8.12E-03 2.94E-02 CF 04 27392 01/09/96 I-131 -4.84E-03 7.22E-03 2.78E-02 CF 05 27393 01/09/96 I-131 -1.25E-02 9.09E-03 3.59E-02 CF 06 27394 01/09/96 I-131 5.26E-03 9.47E-03 3.35E-02 CF 07 27395 01/09/96 I-131 -5.85E-03 7.85E-03 3.04E-02 l CF 08 27396 01/09/96 I-131 1.88E-02 1.10E-02 3.59E-02 CF 01 27554 01/17/96 I-131 2.98E-03 8.27E-03 3.01E-02 (

CF 02 27555 01/17/96 I-131 3.18E-03 8.12E-03 2.95E-02 CF 03 27556 01/17/96 I-131 4.22E-03 9.07E-03 3.30E-02 CF 04 27557 01/17/96 I-131 4.78E-03 9.97E-03 3.54E-02 CF 05 27558 01/17/96 I-131 '9.39E-03 8.59E-03 2.94E-02 CF 06 27559 01/17/96 I-131 -8,58E-03 9.90E-03 3.84E-02 CF 07 27560 01/17/96 I-131 3.13E-03 1.04E-02 3.76E-02 CF 08 27561 01/17/96 I-131 -3.33E-03 9.98E-03 3.82E-02 CF 01 27660 01/23/96 I-131 8.25E-03 1.06E-02 3.70E-02 CF 02 27661 01/23/96 I-131 2.46E-03 7.86E-03 3.01E-02 CF 03 27662 01/23/96 I-131 8.94E-03

-2.37E-03 3.69E-02 CF 04 27663 01/23/96 I-131 -6.39E-03 7.41E-03 '

3.28E-02 CF 05 27664 01/23/96 I-131 2.50E-03 7.97E-03 3.05E-02 CF 06 27665 01/24/96 I-131 7.07E-04 7.52E-03 2.90E-02 1

CF 07 27666 01/23/96 I-131 1.88E-02 1.13E-02 3.49E-02 CF 08 27667 01/23/96 I-131 5.23E-03 1.18E-02 4.22E-02 CF 01 27745 01/31/96 I-131 -4.62E-03 8.25E-03 3.12E-02 CF 02 27746 01/31/96 I-131 -5.97E-03 6.86E-03 2.70E-02 CF 03 27747 01/31/96 I-131 -6.50E-03 9.64E-03 3.66E-02 CF 04 27748 01/31/96 I-131 8.19E-03 7.97E-03 2.72E-02 CF 05 27749 01/31/96 I-131 -1.98E-02 8.39E-03 3.46E-02 CF 06 27750 01/31/96 I-131 7.52E-03 9.30E-03 3.23E-02 CF 07 27751 01/31/96 I-131 2.61E-03 7.86E-03 2.83E-02 CF 08 27752 01/31/96 I-131 ~5.30E-03 7.96E-03 3.08E-02 CF 01 27857 02/07/96 I-131 -1.23E-02 9.16E-03 3.55E-02 CF 02 27858 02/07/96 I-131 1.16E-02 8.61E-03 2.88E-02 CF 03 27859 02/07/96 I-131 -1,020-02 8.68E-03 3.37E-02

! CF 04 27860 02/07/96 I-131 1.06E-02 7.47E-03 2.48E-02

Radioactivity detected (i.e., Concentration > 3 Std. Deviations)

l l

t i

Seabrook Nuclear Power Station

Radiological Environmental Monitoring Data i

(January - December 1996)

{

SAMPLE CONC.

i TYPE STD DEV. MDC

STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m)

_____________________________________________________________________(pCi/cu.m) _________

i j

CF 05 27861 02/07/96 I-131 6.52E-03 7.98E-03 2.77E-02

CF 06 27862 02/07/96 I-131 -9.35E-03 9.06E-03 3.49E-02

) CF 07 27863 02/07/96 l

I-131 8.18E-03 8.51E-03 2.92E-02 4 CF 08 27864 02/07/96 I-131 1.21E-02 8.88E-03 2.96E-02 CF 01 27965 02/14/96 I-131 -7.77E-03 8.38E-03 3.22E-02 CF 02 27966 02/14/96 I-131 -4.41E-03 9.22E-03 3.42E-02 CF 03 27967 02/14/96 I-131 2.42E-03 9.07E-03 3.26E-02 CF 04 27968 02/14/96 I-131 5.29E-03 7.70E-03 2.70E-02 CF 05 27969 02/14/96 3.42E-03 I-131 8.60E-03 3.06E-02 CF 06 27970 02/14/96 I-131 1.50E-02 8.40E-03 2.71E-02 CF 07 27971 02/14/96 I-131 -1.74E-03 9.10E-03 3.34E-02 CF 08 27972 02/14/96 I-131 4.57E-03 8.54E-03 3.02E-02 CF 01 28020 02/21/96 l I-131 -9.00E-03 8.23E-03 3.28E-02 l CF 02 28021 02/21/96 -3.82E-03 I-131 7.95E-03 3.06E-02 CF 03 28022 02/21/96 I-131 1.56E-02 9.08E-03 2.94E-02 CF 04 28023 02/21/96 2.77E-03 I-131 8.29E-03 2.98E-02 CF 05 28024 02/21/96 l I-131 1.04E-02 8.23E-03 2.77E-02 ;

CF 06 28025 02/21/96 I-131 -9.54E-03 1.01E-02 3.88E-02 l CF 07 28026 02/21/96 8.03E-03 I-131 7.33E-03 2.52E-02 I CF 08 28027 02/21/96 I-131 0.00E+00 7.78E-03 2.91E-02 CF 01 28149 02/28/96 I-131 -2.38E-03 1.03E-02 3.76E-02 CF 02 28150 02/28/96 I-131 -2.45E-09 9.62E-03 3.51E-02 CF 03 28151 02/28/96 I-131 1.37E-02 1.07E-02 3.58E-02 CF 04 28152 02/28/96 I-131 1.07E-02 7.99E-03 2.68E-02 CF 05 28153 02/28/96 I-131 1.27E-03 9.08E-03 3.30E-02 CF 06 28154 02/28/96 I-131 1.03E-02 8.93E-03 3.03E-02 CF 07 28155 02/28/96 I-131 1.55E-02 1.03E-02 3.41E-02 CF 08 28156 02/28/96 I-131 -1.43E-02 9.49E-03 3.78E-02 CF 01 28199 03/05/96 I-131 3.79E-03 1.04E-02 3.81E-02 CF 02 28200 03/05/96 I-131 2.63E-03 1.11E-02 4.10E-02 CF 03 28201 03/05/96 I-131 1.58E-03 7.90E-03 2.97E-02 CF 04 28202 03/05/96 I-131 -3.18E-04 7.93E-03 3.04E-02 CF 05 28203 03/05/96 I-131 -3.78E-03 9.65E-03 3.81E-02 CF 06 28204 03/05/96 I-131 1.13E-02 9.98E-03 3.42E-02 CF 07 28205 03/05/96 I-131 3.92E-03 1.07E-02 3.94E-02 CF 08 28206 03/05/96 I-131 1.32E-02 1.04E-02 3.50E-02 CF 01 28311 03/13/96 I-131 -5.72E-03 8.34E-03 3.29E-02 CF 02 28312 03/13/96 I-131 -4.26E-03 8.15E-03 3.19E-02 CF 03 28313 03/13/96 I-131 -9.61E-03 7.34E-03 3.12E-02 CF 04 28314 03/13/96 I-131 5.77E-03 8.16E-03 2.90E-02 CF 05 28315 03/13/96 I-131 5.07E-03 8.49E-03 3.03E-02 CF 06 28316 03/13/96 I-131 2.19E-02 8.92E-03 2.66E-02 CF 07 28317 03/13/96 I-131 -2.94E-03 8.05E-03 3.14E-02 CF 08 28318 03/13/96 I-131 4.29E-03 5.54E-03 2.02E-02

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations)

._m._. . _ m, _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ . _ _ . _ . . _ _ - _ _ _ _ _ . _ _ _ . . _ _ . ..____

l 1

Seabrook Nuclear Power Station j

Radiological Environmental Monitoring Data (January - December 1996)

I 1 SAMPLE CONC. STD DEV. MDC

] TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m)

, -------------------------------------------------------------------- pCi/cu.m) (pCi/cu.m) (

4 l

CF 01 28474 03/19/96 I-131 8.36E-03 1.02E-02 3.55E-02 3

CF 02 28475 03/19/96 I-131 2.60E-02 1.14E-02 3.55E-02 CF 05 28478 03/19/96 I-131 -4.26E-03 1.13E-02 4.18E-02 l CF 06 28470 03/19/96 I-131 -2.89E-03 9.36E-03 3.54E-02 i CF 07 28480 03/19/96 I-131 -1.02E-02 9.95E-03 3.90E-02 j j CF 08 28481 03/19/96 I-131 5.86E-03 1.13E-02 4.00E-02 i CF 03 28476 03/20/96 I-131 -1.77E-02 7.55E-03 3.22E-02 l

CF 04 28477 03/20/96 I-131 -9.06E-03 8.32E-03 3.24E-02 l 1 CF 01 28557 03/27/96 I-131 7.73E-03 6.62E-03 2.27E-02 l CF 02 28558 03/27/96 I-131 2.40E-03 8.84E-03 3.25E-02

CF 03 28559 03/27/96 I-131 1.59E-03 9.42E-03 3.49E-02

$ CF 04 28560 03/27/96 I-131 -2.31E-02 1.03E-02 4.34E-02 2 CF 05 28561 03/27/96 I-131 -1.64E-02 9.89E-03 4.03E-02 l CF 06 28562 03/27/96 I-131 9.49E-03 8.95E-03 3.08E-02

'4 CF 07_ 28563 03/27/96 I-131 -1.49E-03 9.33E-03 3.51E-02 CF 08 28564 03/27/96 I-131 7.92E-03 8.05E-03 2.80E-02 i CF 01 28677 04/03/96 I-131 5.59E-03 8.58E-03 3.02E-02

) CF 02 28678 04/03/96 I-131 3.09E-03 8.05E-03 2.96E-02 l CF 03 28679 04/03/96 I-131 -1.35E-03 6.90E-03 2.78E-02 2

CF 04 28680 04/03/96 I-131 -8.38E-03 6.40E-03 2.89E-02

$ CF 05 28681 04/03/96 I-131 9.02E-03 5.87E-03 1.84E-02

} CF 06 28682 04/03/96 I-131 1.28E-02 8.67E-03 2.75E-02 i

3 CF 07 28683 04/03/96 I-1?1 -2.78E-03 1.00E-02 3.80E-02 CF 08 28684 04/03/96 I-13 1.17E-02 7.10E-03 2.17E-02 1

i CF 01 28804 04/10/96 T 131 -7.11E-03 1.10E-02 4.48E-02 i CF 02 28805 04/10/96 I-131 -2.66E-03 1.14E-02 4.48E-02 i CF 03 28806 04/10/96 I-131 -6.76E-03 1.16E-02 4.66E-02 4 CF 04 28807 04/10/96 I-131 -6.54E-03 7.86E-03 3.46E-02 j CF 05 28808 04/09/96 I-131 1.12E-02 1.37E-02 4.87E-02 CF 06 28809 04/09/96 I-131 -2.63E-02 1.21E-02 5.69E-02 l CF 07 28810 04/09/96 I-131 8.60E-03 1.31E-02 4.78E-02 4

CF 08 28811 04/10/96 I-131 -2.32E-03 9.56E-03 3.86E-02

, CF 01 28969 04/17/96 I-131 -1.06E-02 8.06E-03 3.24E-02

{-

CF 02 28970 04/17/96 I-131 1.77E-03 9.08E-03 3.30E-02 CF 03 28971 04/17/96 I-131 3.87E-03 7.18E-03 2.60E-02 4 CF 04 28972 04/17/96 I-131 1.21E-03 8.82E-03 3.20E-02 3

CF 05 20973 04/17/96 I-131 2.24E-03 7.58E-03 2.74E-02 CF 06 28974 04/17/96 I-131 2.21E-03 7.17E-03 2.60E-02 CF 07 28975 04/17/96 I-131 1.74E-02 7.91E-03 2.46E-02 CF 08 28976 04/17/96 I-131 3.82E-03 8.73E-03 3.12E-02 CF 01 29049 04/24/96 I-131 -9.80E-03 8.22E-03 3.47E-02 CF 02 29050 04/23/96 I-131 3.47E-03 9.58E-03 3.56E-02 CF 03 29051 04/24/96 I-131 4.66E-03 5.52E-03 1.91E-02 CF 04 29052 04/24/96 I-131 4.78E-03 7.70E-03 2.74E-02 CF 05 29053 04/23/96 I-131 1.24E-02 9.32E-03 3.02E-02 j CF 06 29054 04/24/96 I-131 6.76E-03 7.95E-03 2.77E-02 1 P

Radioactivity detected (i.e., Concentration > 3 Std. Deviations) I

- _ . - - . . . - _ - . . - , -. - -. . _ . . - - - _ _ ~ . - - - ~ ~ = _ - _ .-- -..---_ _ . - -

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC.

TYPE STD DEV. MDC !

STA. LSN END DATE NUCLIDE (pCi/cu.m) '

_.--.-----------......-----...-------.....---------------------..).--(pCi/cu.m)

(pCi/cu.m t

l CF 07 29055 04/24/96 I-131 8.53E-03 7.90E-03 2.66E-02 l CF 08 29056 04/24/96 I-131 8.66E-03 8.33E-03 2.81E-02 !

CF 01 29217 04/30/96 I-131 -3.64E-03 9.32E-03 3.47E-02 CF 02 29218 04/30/96 I-131 -9.75E-03 9.75E-03 3.73E-02 CF 03 29219 05/01/96 I-131 -6.40E-03 6.53E-03 2.54E-02 l CF 04 29220 05/01/96 I-131 -4.91E-03 5.80E-03 2.31E-02 CF 05 29221 05/01/96 0.00E+00 i

CF I-131 7.70E-03 2.81E-02 06 29222 04/30/96 I-131 8.44E-03 8.42E-03 2.90E-02 CF 07 29223 05/01/96

+

I-131 1.85E-02 7.48E-03 2.27E-02 CF 08 29224 04/30/96 I-131 -1.38E-02 8.22E-03 3.37E-02 l CF 01 29322 05/08/96 2.70E-03 I-131 6.68E-03 2.38E-02 CF 02 29323 05/08/96 I-131 1.11E-02 7.60E-03 2.52E-02 (

CF 03 29324 05/08/96 I-131 -8.01E-03 6.52E-03 2.58E-02 CF 04 29325 05/08/96 I-131 7.57E-03 7.08E-03 CF 05 2.41E-02 i 29326 05/08/96 I-131 8.29E-03 8.18E-03 2.79E-02 !

CF 06 29327 05/08/96 I-131 1.06E-02 7.79E-03 2.60E-02 CF 07 29328 05/08/96 I-131 -2.14E-03 7.71E-03 2.88E-02 CF 29329 05/08/96 08 I-131 -8,54E-03 7.76E-03 2.98E-02

[

CF 01 29371 05/15/96 I-131 1.78E-03 8.06E-03 3.02E-02 j CF 02 29372 05/15/96 I-131 9.98E-03 1.05E-02 3.65E-02 CF 03 29373 05/15/96 I-131 -8.51E-03 7.51E-03 3.11E-02 '

CF 04 29374 05/15/96 I-131 6.96E-03 8.64E-03 3.04E-02

! CF 05 29375 05/15/96 I-131 -2.48E-03 8.47E-03 3.28E-02 CF 06 29376 05/15/96 I-131 3.19E-03 7.82E-03 2.89E-02 CF 07 29377 05/15/96 4.68E-03 I-131 7.80E-03 2.83E-02 CF 08 29378 05/15/96 I-131 1.91E-02 1.08E-02 3.48E-02 CF 01 29496 05/22/96 I-131 1.20E-02 6.85E-03 2.09E-02 CF 02 29497 05/22/96 I-131 -6.60E-03 9.14E-03 3.56E-02 CF 03 29498 05/22/96 I-131 -9. 3 6E-03 5.83E-03 2.55E-02 CF 04 29499 05/22/96 I-131 -4.30E-03 7.76E-03 2.97E-02 CF 05 29500 05/22/96 I-131 8.08E-03 6.35E-03 2.07E-02 CF 06 29501 05/22/96 I-131 1.88E-03 7.38E-03 2.69E-02 CF 07 29502 05/22/96 I-131 8.65E-03 6.79E-03 2.22E-02 CF 08 29503 05/22/96 I-131 2.58E-02 9.15E-03 2.69E-02 CF 01 29671 05/29/96 I-131 -1.13E-03 7.70E-03 2.91E-02 CF 02 29672 05/29/96 I-131 8.26E-03 7.90E-03 2.65E-02 CF 03 29673 05/29/96 I-131 -4.77E-03 7.10E-03 2.83E-02 CF 04 29674 05/29/96 I-131 1.38E-03 6.94E-03 2.57E-02 i CF 05 29675 05/29/96 I-131 6.77E-03 7.45E-03 2.54E-02 l CF 06 29676 05/29/96 2.03E-03 6.00E-03 I-131 2.26E-02 !

l CF 07 29677 05/29/96 I-131 -7.80E-03 6.19E-03 2.72E-02 I l CF 08 29678 05/29/96 I-131 -1.29E-02 7.99E-03 3.39E-02 CF 01 29753 06/05/96 1.58E-02 8.91E-03 I-131 2.86E-02 CF 02 29754 06/05/96 I-131 -9.30E-03 8.20E-03 3.39E-02 CF 03 29755 06/05/96 I-131 10.0E-03 8.86E-03 3.03E-02

Radioactivity detected (i.e., Concentration > 3 Std. Deviations) l

. _ . - - -- .- __ . . _ - - - - . _ _ _ _ - . - - - - - - - . - . _ . . . - - . . _ . ~

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC. STD DEV. MDC TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m) (pCi/cu.m)

! CF 04 29756 06/05/96 I-131 -5.14E-03 9.28E-03 3.61E-02 l CF 05 29757 06/05/96 I-131 -1.45E-09 8.05E-03 3.06E-02 l CF 06 29758 06/05/96 I-131 9.75E-03 1.05E-02 3.65E-02 CF 07 29759 06/05/96 I-131 -3.18E-03 7.41E-03 3.04E-02 CF 08 29760 06/05/96 I-131 -7.97E-03 7.36E-03 3.21E-02 CF 01 29899 06/12/96 I-131 -4.52E-03 7.99E-03 3.25E-02 CF 02 29900 06/12/96 I-131 5.19E-03 8.37E-03 2.98E-02 CF 03 29901 06/12/96 I-131 -8.49E-03 8.87E-03 3.70E-02 CF 04 29902 06/12/96 I-131 5.76E-03 9.15E-03 3.23E-02

! CF 05 29903 06/12/96 I-131 -1.53E-03 7.96E-03 3.11E-02 CF 06 29904 06/12/96 I-131 8.18E-03 7.23E-03 2.43E-02 <

l CF 07 29905 06/12/96 I-131 4.30E-03 7.18E-03 2.62E-02 l

CF 08 29906 06/12/96 I-131 2.86E-03 7.90E-03 2.93E-02 CF 01 30026 06/19/96 I-131 1.24E-03 7.13E-03 2.65E-02 l CF 02 30027 06/19/96 I-131 -1.99E-04 7.79E-03 2.91E-02 l CF 03 30028 06/19/96 I-131 2.33E-02 8.97E-03 2.68E-02 CF 04 30029 06/19/96 I-131 1.12E-02 8.18E-03 2.73E-02 l CF 05 30030 06/19/96 I-131 4.90E-03 6.93E-03 2.47E-02 i CF 06 30031 06/19/96 I-131 -1.42E-02 7.86E-03 3.30E-02 l CF 07 30032 06/19/96 I-131 0.00E+00 8.72E-03 3.22E-02

! CF 08 30033 06/19/96 I-131 -1.78E-02 8.70E-03 3.61E-02 CF 01 30124 06/26/96 I-131 6.89E-03 8.25E-03 2.94E-02 i CF 02 30125 06/26/96 I-131 3.56E-03 9.74E-03 3.58E-02 l CF 03 30126 06/26/96 I-131 3.60E-03 9.05E-03 3.35E-02 CF 04 30127 06/26/96 I-131 5.47E-03 1.02E-02 3.67E-02 CF 05 30128 06/26/96 I-131 -4.05E-03 9.05E-03 3.56E-02

, CF 06 30129 06/26/96 I-131 0.00E+00 1.02E-02 3.84E-02 CF 30130 06/26/96 07 I-131 -2.23E-03 1.07E-02 4.08E-02 CF 08 30131 06/26/96 I-131 5.26E-03 8.28E-03 3.02E-02 CF 01 30344 07/03/96 I-131 4.07E-03 9.68E-03 3.46E-02 CF 02 30345 07/02/96 I-131 -8.36E-03 1.10E-02 4.26E-02 CF 03 30346 07/03/96 I-131 -1.14E-03 9.88E-03 3.66E-02 CF 04 30347 07/03/96 I-131 -1.40E-03 1.04E-02 3.82E-02 CF 05 30348 07/03/96 I-131 2.71E-03 9.19E-03 3.32E-02 CF 06 30349 07/03/96 I-131 -7.54E-03 9.65E-03 3.73E-02 CF 07 30350 07/03/96 I-131 -2.83E-03 1.06E-02 3.93E-02 l CF 08 30351 07/03/96 I-131 -8.98E-03 1.08E-02 4.12E-02 CF 01 30411 07/09/96 I-131 0.00E+00 1.23E-02 4.71E-02 CF 02 30412 07/09/96 I-131 -8.88E-03 1.13E-02 4.60E-02 l CF 03 30413 07/09/96 I-131 -2.69E-03 1.04E-02 4.26E-02 CF 04 30414 07/09/96 I-131 1.53E-02 1.02E-02 3.35E-02 I CF 05 30415 07/09/96 I-131 -2.54E-03 9.83E-03 4.03E-02 l

CF 06 30416 07/09/96 I-131 -2.62E-03 8.67E-03 3.69E-02 CF 07 30417 07/09/96 I-131 -1.82E-02 1.13E-02 5.06E-02 CF 08 30418 07/09/96 I-131 -2.53E-02 1.14E-02 5.27E-02

[

l j

Radioactivity detected (i.e., Concentration > 3 Std. Deviations) l l

- .. -_. . ..--_- - ~ ~. - _ - - - ~ - _ ,

Seabrook Nuclear Power Station l Radiological Environmental Monitoring Data i (January - December 1996) l SAMPLE CONC. STD DEV. MDC !

TYPE STA. LSN END DATE NUCLIDE (pCi/cu.m) ( (pCi/cu.m)

_________________________________________________________pCi/cu.m) _____________________ {

CF 01 30538 07/17/96 CF I-131 -2.83E-03 8.07E-03 3.45E-02 02 30539 07/17/96 I-131 -7.57E-03 8.77E-03 3.88E-02 CF 03 30540 07/17/96 I-131 -3.11E-03 7.85E-03 2.98E-02 CF 04 30541 07/17/96 I-131 -1.43E-03 7.21E-03 2.72E-02 CF 05 30542 07/17/96 I-131 5.18E-03 7.61E-03 2.63E-02 CF 06 30543 07/17/96 CF I-131 2.23E-03 6.89E-03 2.48E-02 i

07 30544 07/17/96 I-131 -8.70E-03 7.18E-03 2.92E-02

{ CF 08 30545 07/17/96 I-131 5.78E-03 i

8.23E-03 2.82E-02 CF 01 30694 07/24/96 CF I-131 1.55E-02 9.27E-03 3.02E-02 02 30695 07/24/96 I-131 -8.49E-03 8.31E-03 3.26E-02 CF 03 30696 07/24/96 I-131 CF

-2.54E-03 6.49E-03 2.56E-02 04 30697 07/24/96 I-131 1.43E-02 7.51E-03 2.39E-02 CF 05 30698 07/22/96 I-131 4.00E-03 1.41E-02 5.10E-02 l CF 06 30699 07/24/96 I-131 -2.50E-03 8.47E-03 3.19E-02 CF 07 30700 07/24/96 I-131 6.17E-03 8.28E-03 2.90E-02 CF 08 30701 07/24/96 l I-131 -3.71E-03 8.66E-03 3.27E-02 l

I CF 01 30837 07/31/96 I-131

-4.82E-03 8.00E-03 3.08E-02 CF 02 30838 07/31/96 I-131 -9.70E-03 7.48E-03 3.04E-02 CF 03 30839 07/31/96 I-131 1.72E-02 9.24E-03 2.96E-02 CF 04 30840 07/31/96 I-131 3.88E-03 CF 8.47E-03 3.04E-02 !

05 30841 07/31/96 I-131 5.78E-03 8.17E-03 2.91E-02 '

CF 06 30842 07/31/96 I-131 4.97E-03 8.05E-03 2.86E-02 i CF 07 30843 07/31/96 I-131 -1.38E-02 8.03E-03 3.32E-02

! CF 08 30844 07/31/96 l

I-131 -1.50E-02 8.08E-03 3.35E-02

! CF 01 30910 08/07/96 I-131 6.37E-03 8.15E-03 2.86E-02 i CF 02 30911 08/07/96 I-131 1.19E-02 8.05E-03 2.66E-02 CF 03 30912 08/07/96 I-131 -8.05E-03 7.83E-03 3.16E-02 CF 04 30913 08/07/96 I-131 3.41E-03 7.21E-03 2.62E-02 CF 05 30914 08/07/96 I-131 7.82E-03 7.60E-03 2.62E-02 CF 06 30915 08/07/96 I-131 -3.98E-03 7.62E-03 2.98E-02 l

CF 07 30916 08/07/96 I-131 -6.46E-03 7.33E-03 .95E-02 CF 08 30917 08/07/96 I-131 3.96E-03 7.35E-03 2.66E-02 CF 01 31041 08/13/96 I-131 5.87E-03 8.04E-03 2.86E-02 CF 02 31042 08/13/96 I-131 0.00E+00 8.81E-03 3.31E-02 CF 03 31043 09/13/96 I-131 -4.24E-03 8.65E-03 3.36E-02 I CF 04 31044 08/13/96 I-131 -2.51E-03 9.83E-03 3.69E-02 CF 05 31045 08/13/96 I-131 2.62E-02 1.38E-02 4.39E-02 CF 06 31046 08/13/96 I-131 -1.16E-03 8.96E-03 3.39E-02 CF 07 31047 08/13/96 I-131 -5.61E-04 9.14E-03 3.43E-02 CF 08 31048 08/13/96 -1.01E-03 I-131 1.02E-02 3.78E-02 CF 01 31183 08/21/96 I-131 -1.17E-02 7.94E-03 3.26E-02 CF 02 31184 08/21/96 I-131 7.38E-04 7.20E-03 2.71E-02 CF 03 31185 08/21/96 1.09E-02 I-131 8.15E-03 2.73E-02 CF 04 31186 08/21/96 -1.21E-03 I-131 6.93E-03 2.64E-02 j CF 05 31187 08/21/96 7.70E-03 I-131 7.03E-03 2.42E-02

CF 06 31188 08/21/96 I-131 9.38E-03 7.70E-03 2.61E-02 i

i

Radioactivity detected (i.e., Concentration > 3 Std. Deviations) i i

1

- ~ . - - . - - . - . _ - . - - . . -.--- - . - . - . . . . - - - . .

Seabrook Nuclear Power Station \

Radiological Environmental Monitoring Data l (January - December 1996) ;

iAMPLE CONC.

YYPE STA. STD DEV. MDC '

LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m (pCi/cu.m)

) ------------

i l

CF 07 31189 08/21/96 I-131 -2.69E-03 8.06E-03 3.09E-02 CF 08 31190 08/21/96 I-131 -4.04E-03 8.61E-03 3.30E-02 CF 01 31314 08/28/96 I-131 '

-1.41E-02 8.99E-03 3.76E-02 CF 02 31315 08/28/96 I-131 -1.13E-02 9.25E-03 3.79E-02 CF 03 31316 08/28/96 I-131 1.54E-02 7.56E-03 2.32E-02 CF 04 31317 08/28/96 I-131 6.71E-03 7.88E-03 2.79E-02 j CF 05 31318 08/28/96 I-131 2.01E-02 8.32E-03 2.45E-02 CF 06 31319 08/28/96 I-131 -6.43E-03 8.50E-03 3.43E-02

{

CF 07 31320 08/28/96 I-131 -9.71E-03 8.56E-03 3.54E-02 CF 08 31321 08/28/96 I-131 -9.65E-03 7.88E-03 3.33E-02 CF 01 31456 09/04/96 7.21E-03 I-131 7.50E-03 2.57E-02 CF 02 31457 09/04/96 I-131 -1.06E-02 8.31E-03 3.23E-02 CF 03 31458 09/04/96 I-131 -1.89E-03 6.95E-03 2.58E-02 CF 04 31459 09/04/96 I-131 -9.54E-04 6.95E-03 2.57E-02 CF 05 31460 09/04/96 I-131 4.09E-03 7.22E-03 2.56E-02 CF 06 31461 09/04/96 I-131 7.17E-03 7.64E-03 2.63E-02 CF 07 31462 09/04/96 I-131 1.19E-02 8.73E-03 2.91E-02 CF 08 31463 09/04/96 I-131 -3.17E-03 7.85E-03 2.94E-02 CF 01 31533 09/11/96 I-131 5.33E-04 8.29E-03 3.14E-02 CF 02 31534 09/11/96 I-131 3.20E-03 8.34E-03 3.06E-02 CF 03 31535 09/11/96 I-131 1.08E-02 7.37E-03 2.34E-02 CF 04 31536 09/11/96 I-131 4.94E-03 7.97E-03 2.84E-02 CF 05 31537 09/11/96 I-131 -9.24E-03 6.25E-03 2.94E-02 CF 06 31538 09 / .'.1/ 9 6 I-131 -3.53E-03 9.83E-03 3.77E-02 CF 07 31539 09/11/96 I-131 2.49E-03 9.78E-03 3.56E-02 CF 08 31540 09/11/96 I-131 -1.05E-03 7.67E-03 3.02E-02 CF 01 31661 09/18/96 I-131 -8.10E-03 8.94E-03 3.36E-02 CF 02 31662 09/18/96 I-131 -9.54E-03 9.18E-03 3.48E-02 CF 03 31663 09/18/96 I-131 -2.11E-03 8.11E-03 2.97E-02 CF 04 31664 09/18/96 I-131 -9.66E-04 8.14E-03 2.96E-02 !

CF 05 31665 09/18/96 I-131 -3.99E-03 7.33E-03 2.77E-02 !

CF 06 31666 09/18/96 I-131 -5.30E-03 9.54E-03 3.52E-02 CF 07 31667 09/18/96 I-131 5.36E-03 7.51E-03 2.63E-02 CF 08 31668 09/18/96 I-131 3.01E-03 8.48E-03 3.02E-02 CF 01 31774 09/25/96 I-131 - 1. 3 3 E-- 02 7.17E-03 3.17E-02 CF 02 31775 09/25/96 I-131 5.30E-03 8.16E-03 2.85E-02 CF 03 31776 09/25/96 I-13] 5.34E-03 6.28E-03 2.19E-02 CF 04 31777 09/25/96 I-13!. 5.71E-03 5.74E-03 1.97E-02 CF 05 31778 09/25/96 I-1?' 5.51E-03 6.90E-03 2.39E-02 CF 06 31779 09/25/96 I-1.11 9.40E-03 7.39E-03 2.41E-02 CF 07 31780 09/25/96 I-121 -8.96E-03 7.91E-03 3.24E-02 CF 08 31781 09/25/96 I- 13 .' -5.91E-04 8.70E-03 3.23E-02 CF 01 31913 10/02/96 I-131 1.15E-03 1.03E-02 3.83E-02 CF 02 31914 10/02/96 I-131 -6.07E-03 9.10E-03 3.57E-02 CF 03 31915 10/02/96 I-131 -1.83E-02 9.50E-03 3.93E-02

Radioactivity detected (i.e., Concentration > 3 Std. Deviations)

.- ..- . . . . _ . - - - . - - - - . . ~ . . ~ - - - - - - _ ~ - _ - . . - .

l 4.

I Seabrook Nuclear Power Station f Radiological Environmental Monitoring Data

( (January - December 1996)

'\

3 SAMPLE CONC. STD DEV. t MDC 1

. ___ I_____ ___ _ _ _ _____ 1 __ _ 1 __ _ 1 CF 04 31916 10/02/96 I-131 -2.87E-03 9.30E-03 3.52E-02 CF 05 31917 10/02/96 I-131 -4.53E-03 9.83E-03 3.74E-02 j

' CF 06 31918 10/02/96 I-131 -7.68E-03 8.55E-03 3.45E-02 CF 07 31919 10/02/96 I-131 1.27E-02 CF 1.03E-02 3.48E-02 {

08 31920 10/02/96 I-131 4.62E-03 1.01E-02 3.62E-02 1 CF 01 32033 10/09/96 I-131 -1.06E-03 7.28E-03 2.78E-02 i CF 02 32034 10/09/96 I-131 8.53E-04 8.25E-03 3.02E-02 l CF 03 32035 10/09/96 I-131 5.29E-03 6.25E-03 2.17E-02 l CF 04 32036 10/09/96 I-131 5.66E-03 8.31E-03 2.87E-02 CF 05- 32037 10/09/96 I-131 -4.61E-03 5.84E-03 2.45E-02

- CF 06 32038 10/09/96 I-131 2.88E-03 7.11E-03 2.59E-02 ;

CF 07 32039 10/09/96 I-131 8.59E-03

-1.30E-02 3.55E-02 l CF 08 32040 10/09/96 I-131 2.02E-03 7.93E-03 2.89E-02 l CF 01 32399 10/16/96 I-131 -1.04E-03 8.11E-03 2.97E-02 CF 02 32400 10/16/96 I-131 -7.91E-03 7.92E-03 3.07E-02 CF 03 32401 10/16/96 I-131 -1.10E-02 7.28E-03 2.90E-02 CF 04 32402 10/16/96 I-131 -1.21E-02 7.40E-03 2.96E-02 CF 05 32403 10/16/96 I-131 -2.12E-02 7.49E-03 3.17E-02 CF 06 32404 10/16/96 I-131 -4.43E-03 7.01E-03 2.72E-02 CF 07 32405 10/16/96 I-131 4.61E-03 9.36E-03 3.30E-02 CF 08 32406 10/16/96 I-131 1.09E-03 7.92E-03 2.88E-02 CF 01 32475 10/23/96 I-131 4.06E-03 9.28E-03 3.32E-02 CF 02 32476 10/23/96 I-131 -7.13E-03 9.57E-03 3.71E-02 CF 03 32477 10/23/96 I-131 4.25E-03 6.91E-03 2.49E-02 CF 04 32478 10/23/96 I-131 -1.29E-02 7.97E-03 3.30E-02 CF 05 32479 10/23/96 I-131 -7.69E-03 6.28E-03 2.66E-02 CF 06 32480 10/23/96 I-131 -7.32E-03 8.42E-03 3.33E-02 i CF 07 32481 10/23/96 I-131 5.42E-03 8.36E-03 2.97E-02 l CF 08 32482 10/23/96 I-131 1.13E-02 7.95E-03 2.65E-02 l CF 01 32610 10/30/96 I-131 7.25E-04 9.78E-03 3.67E-02 !

CF 02 32611 10/30/96 I-131 1.39E-02 1.10E-02 3.71E-02 i CF 03 32612 10/30/96 I-131 4.90E-03 1.07E-02 3.84E-02 CF 04 32613 10/30/96 I-131 6.50E-03 8.28E-03 2.95E-02 CF 05 32614 10/30/96 I-131 -6.72E-03 1.04E-02 4.03E-02 CF 06 32615 10/30/96 I-131 -5.37E-03 9.30E-03 3.71E-02 CF 07 32616 10/30/96 I-131 8.81E-03 8.64E-03 3.01E-02 CF 08 32617 10/30/96 I-131 -1.79E-03 8.96E-03 3.49E-02 CF 01 32705 11/05/96 I-131 4.22E-03 9.44E-03 3.38E-02 CF 02 32706 11/05/96 I-131 4.39E-03 8.66E-03 3.12E-02 CF 05 32709 11/05/96 I-131 1.24E-03 8.10E-03 3.00E-02 CF 07 32711 11/05/96 I-131 -1.49E-03 9.30E-03 3.50E-02 CF 03 32707 11/06/96 I-131 -1.03E-02 5.95E-03 2.57E-02 CF 04 32708 11/06/96 I-131 5.75E-03 7.54E-03 2.64E-02 CF 06 32710 11/06/96 I-131 0.00E+00 6.89E-03 2.59E-02 CF 08 32712 11/06/96 I-131 -1.38E-02 7.66E-03 3.17E-02

)

Radioactivity detected (i.e., Concentration > 3 Std. Deviations) l

)

\

1 Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996) ,

SAMPLE i TYPE CONC. STD DEV. MDC STA. LSN END DATE NUCLIDE

pCi/cu.m)

( (pCi/cu.m) (pCi/cu.m)

CF 01 32887 11/13/96 CF-I-131 1.44E-03 8.29E-03 3.08E-02 02 32888 11/13/96 I-131 -5.93E-03 7.56E-03 3.08E-02

'CF T 03 32889 11/13/96 l

I-131 3.59E-03 8.36E-03 3.05E-02 CF. 04 32890 11/13/96 I-131 1.50E-03 7.51E-03

)

CF 05 2.83E-02 '

32891 11/13/96 I-131 -4.09E-03 7.34E-03 2.91E-02 CF 06 32892 11/13/96

.CF 07 I-131 -6.59E-03 9.60E-03 3.79E-02 32893 11/13/96 I-131 4.44E-03 9.25E-03 3.33E-02 CF 08 32894 11/13/96 I-131 6.60E-03 9.33E-03 3.32E-02 CF 01 32971 11/20/96 CF I-131 1.02E-02 7.59E-03 2.55E-02 02 32972 11/20/96 I-131 3.40E-03 CF 03 9.31E-03 3.42E-02 32973 11/20/96 I-131 3.15E-03 8.62E-03 3.17E-02 CF 04 32974 11/20/96 CF I-131 1.27E-02 8.37E-03 2.75E-02 05 32975 11/20/96 I-131 CF 06

-4.81E-03 7.69E-03 3.12E-02 32976 11/20/96 I-131 -3.55E-03 1.01E-02 3.89E-02 CF 07 32977 11/20/96 CF I-131 -3.49E-03 1.18E-02 4.45E-02 08 32978 11/20/96 I '.31 -2.59E-03 1.07E-02 4.07E-02 CF 01 33112 11/27/96 CF I-131 -3.03E-03 1.11E-02 4.13E-02

, 02 33113 11/27/96 I-131 -1.53E-02 9.92E-03 4.05E-02 CF 03 33114 11/27/96 I-131 1.45E-03 8.80E-03 3.25E-02 CF 04 33115 11/27/96 3 CF I-131 7.08E-03 1.12E-02 3.93E-02 )

05 33116 11/27/96 I-131 1.93E-03 1.08E-02 3.89E-02 CF 06 33117 11/27/96 CF I-131 1.52E-03 8.46E-03 3.15E-02 07 33118 11/27/96 I-131 CF

-3.09E-03 1.11E-02 4.15E-02 08 33119 11/27/96 I-131 1.10E-02 1.16E-02 3.99E-02 CF 01 33186 12/04/96 CF I-131 -3.20E-03 9.88E-03 3.77E-02 02 33187 12/04/96 I-131 -4.74E-03 7.24E-03 2.97E-02 CF 03 33188 12/04/96 I-131 -5.58E-03 8 32E-03 3.29E-02 CC 04 33189 12/04/96 I-131 9.23E-03 8.43E-03 2.90E-02 Cr 33190 12/04/96 I-131 -1.48E-03 7.69E-03 )

Or 2.98E-02 't 06 33191 12/04/96 I-131 6.46E-03 9.13E-03 3.25E-02 CF 07 33192 12/04/96 I-131 CF

-6.59E-03 9.02E-03 3.61E-02 08 33193 12/04/96 I-131 -3.23E-03 7.22E-03 2.93E-02 CF 01 33323 12/11/96 I-131 -1.16E-02 1.09E-02 4.44E-02 CF 02 33324 12/11/96 I-131 CF

-1.11E-02 9.23E-03 3.90E-02 03 33325 12/11/96 I-131 -1.25E-02 1.03E-02 4.20E-02 CF 04 33326 12/11/96 I-131 -2.81E-02 1.02E-02 4.56E-02 CF 05 33327 12/11/96 I-131 -1.07E-02 9.06E-03 3.79E-02 CF 06 33328 12/11/96 I-131 -7.65E-03 1.08E-02 4.29E-02 CF 07 33329 12/11/96 I-131 -3.05E-03 8.85E-03 3.53E-02 CF 08 33330 12/11/96 I-131 2.28E-02 8.92E-03 2.36E-02 CF 01 33432 12/17/96 CF I-131 -1.60E-02 8.16E-03 3.46E-02 02 33433 12/17/96 I-131 -2.36E-02 8.91E-03 3.86E-02 CF 03 33434 12/17/96 I-131 -4.76E-03 6.93E-03 2.73E-02 CF 04 33435 12/17/96 CF I-131 .' . 5 3 E- 0 3 8.07E-03 2.89E-02 05 33436 12/17/96 I-131 -7.49E-03 8.46E-03 3.30E-02 CF 06 33437 12/17/96 I-131 -1.26E-02 7.32E-03 3.02E-02 I

Radioactivity detected (i.e., Concentration > 3 Std. Deviations)

}

Seabrook Nuclear Power Station Radiological Environmental Monitoring Data (January - December 1996)

SAMPLE CONC.

TYPE STA. STD DEV. MDC LSN END DATE NUCLIDE (pCi/cu.m) (pCi/cu.m (pCi/cu.m)

------------------------------------) ------------

CF 07 33438 12/17/96 I-131 1.11E-02 9.72E-03 3.30E-02 CF 08 33439 12/17/96 I-131 -5.49E-03 8.47E-03 3.30E-02 CF 01 33506 12/23/96 I-131 -6.05E-03 1.32E-02 4.86E-02 CF 02 33507 12/23/96 I-131 -6.09E-03 1.10E-02 4.16E-02 CF 03 33508 12/23/96 1-131 -1.56E-03 1.07E-02 3.91E-02 CF 04 33509 12/23/96 I-131 8.62E-03 1.00E-02 3.46E-02 CF 05 33510 12/23/96 I-131 1.07E-03 1.12E-02 4.03E-02 CF 06 33511 12/23/96 I-131 -5.18E-03 1.20E-02 4.55E-02 CF 07 33512 12/23/96 I-131 8.06E-03 1.13E-02 3.92E-02 CF 08 33513 12/23/96 I-131 3.23E-03 1.02E-02 3.60E-02 CF 01 33662 12/31/96 I-131 1.56E-02 8.89E-03 2.88E-02 CF 02 33663 12/31/96 I-131 CF

-5.79E-03 8.89E-03 3.36E-02 03 33664 12/31/96 I-131 1.58E-04 7.38E 03 2.70E-02 CF 04 33665 12/31/96 I-131 CF

-4.00E-03 7.88E-03 2.95E-02 05 33666 01/02/97 I-131 0.00E+00 6.44E-03 2.33E-02 CF 06 33667 12/31/96 CF I-131 1.79E-02 9.64E-03 3.11E-02 07 33668 12/31/96 I-131 -4.45E-03 9.17E-03 3.41E-02 CF 08 33669 12/31/96 I-131 -2.24E-03 8.39E-03 3.11E-02 i

Radioactivity detected (i .e. , Concentration > 3 Std. Deviations)

+ . .

-

ML20138H276

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