ML20127M033

Annual Radiological Environ Monitoring Rept - 1976

ML20127M033
Person / Time
Site:	Monticello
Issue date:	12/31/1976
From:	Hueber L, Johnson B, Mayer L NORTHERN STATES POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 9211250337
Download: ML20127M033 (45)

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. NORTHERN STATES POWER C O ki P A N Y wim w s Apou e, wiw w u or4 s m4oi .

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Mr J G Keppler, Directog Region III

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Office of Inspection & D1forcement ,[ 7 U S Nuclear Regulatory Cocnission -

799 Roosevelt Road _ 7 y2 1 Glen Ellyn, IL 60137

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Dear Mr Keppler:

, p MONTICELLO NUCLEAR GENERATING P1 ANT Docket No. 50-263 License No. DPR-22 Annual Radiological Environmental Monitoring Report 1976 In accordance with the Monticello Technical Specifications, Appendix A to the Operating License DPR-22, we are submitting.two copies of the Annual Radiological Er.vironmental Monitoring Report Covering the period January 1, 1976 through December 31, 1976.

Yours very trtily, .

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(L $ h 9)O L 0 Mayer, PE Manager of Fuclear Support Services s -

LOM/ECW/deh c:: Dir, IE, USNRC (20)

Dir, MIPC, USNRC (2)

MPCA ,

Attn: J W Ferman G Charnoff -

Attachment .

i 9211250337 761231 PDR R

ADOCK 05000263 PDR N

77.bq/d3l.

P NORTHERN STATES POWER' COMPANY MINNEAPOLIS, MINNESOTA RADIATION ENVIRONMENTAL MONITORING ,

FOR MONTICELLO NUCLEAR GENERATING PLANT DOCKET NO. 50-263 LICENSE NO. DPR-22 1

ANNUAL' REPORT

SUMMARY

AND INTERPRE"ATION January - December 1976 Nalco No. 5501-07567 Prepared Under Contract by NAILO ENVIRONMENTAL SCIENCES 1500 Frontage Road Northbrook, Illinois 60062 Report approved by: p

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f t' # b 4 u L. G. Muebner, M.S. '

, ,1 W bid.phhson,Ph.'D.. -\

Head Manag(t- l Nuclear Sciences Section Environ Nntal Sciences.

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Report to.

i UNITED STATES NUCLEAR- REGULA'IORY COMMISSION Annual

. . Radiation Environmental Monitoring: Report ~

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- January- 1, .1976 to- December 31,21976

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NALCD CNVI~JONMCNTAL CGIONCOO t

PREFACE The staff membdra of the Nuclear Sciences Section of Nalco Environmental Sciences were responsible for the-acquisition of the data presented in this report. Samples were collected by personnel of Northern States Power Company.

The report was prepared by G.R. Davidson,~ Assistant Head, Nuclear Sciences Section, under the direction of L.G. Huebner, Head, Nuclear Sciences Section.

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NALOD CNVIRONMENTAL CCICNCOO

\ s TABLE OF CONTENTS Page Preface . . . . . . . . . . . . . . .. . . . .. . . .

11 List of Tables. . . . . . . . . . . . . . . . .. . . iv I. Introduction. . . . . . . . . . . .. . . . . .. . . I-1 II. Summary . . . . . . . - . . . . . . . .. . . . . . . . II-1

III. Procedures. . . . . . . . . .. . . . . . . . .. . . III-1 A. Changes . . . . . . . . . . . . .. . . . . . . . . III-1 B. Prechange Program . . . . . . ... . . . . . . . III-2 C. Postchange Program. . . . . ... . .. . . . . . III-4 D. Changeover Date . . . . . . . . . . .. . .. . . -III-5 ,

IV. Results and-Discussion. . . . . . . . . . . . . . . . IV-1 d

A. Prechange Period. . . . .. . _ . . . . . . . . . . IV-1 B. Postchange Period . . . . . . .. . . . - . .. . . . IV-5 V. Tables .. . . . . . . . . . . . . .. . . . .. .. V l

VI. References Cited . . . .. .. . . ... . . . . . . . VI-1 4

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LIST OF TABLES-Title Page No.

Prechange sampling locations . . - . . . . . . . . . . . V-1

- 1 Prechange sample collection 2< analysis program . . . V-2 2

Postchange sampling locati;as . . . . . . . . . . . . V-3 3

Postchange sample collection and analysis program. . . V-4

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! 5 Sample collections and analyses missed,- V-5 i

prechange and postchange program, 1976 . . . . . .

6 Environmental Radiological. Monitoring Program l

i Summary-Prechange Program .. . . . . . . . . . . 'V-6 i '

7 Environmental Radiological Monitoring Program 4

Summary-Postchange Program . . . . . . . . . . . . V-7 i

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i I. Introduction i This report summarizes and interprets results of the opera-i tional radiation environmental monitoring program. conducted by i

i NALCO Environmental Sciences (NALCO ES) at the Monticello Nuclear Generating Plant, Monticello, Minnesota during the period January-December, 1976. This program monitors the levels of radioactivity l

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! in the air, terrestrial, and aquatic environments in order to

! assess the impact of the plant on its surroundings.

I Tabulation of the individual' analyses made during the year are not included in this report. These' data are included in a reference document (NALCO Environmental Sciences.1977).

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NALCO CNVIRONM" INTAL OCIONcGO 4

l II. Summary l The 1976 Radiation Environmental Monitoring Program at the Monticello Nuclear Generating Plant is described. Changes made by the 20 May 1976 revision in technical specifications are discussed.

Results of all measurements made in 1976 are summarized and analyzed. It is concluded that the data indicate no environment-

' al radiation effect attributable to plant operation.

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i l III. Procedures A. Changes The year 1976 was marked by a number of changes-in the monitoring program.

As of January 1, 1976,-NSP shifted laboratory responsi-I bility for the radiation environmental program from the Minnesota Department of Health (MDH) to NALCO ES. In order to determine the comparability of results obtained by the two l

laboratories, a number of split samples collected in late 1975 l were analyzed by both laboratories. There were a number of

! apparently large -differences in the results obtained by the two laboratories. This prompted NSP to hire an independent consultant

to determine the reasons for: these differences.- - These findings

! are published elsewhere (Barber 1976) and are reviewed briefly in i

Section IV. A of this report.

Secondly, NSP requested that all gamma analyses monitor the activities of.four selected isotopes, zirconium-95, cesium-137,

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cerium-144, and potassium-40. The first three were' selected 1

i because each constitutes about 10% of the total activity of fission l'

products ten days after reactor shutdown whereas each usually represents only an extremely small percentage of the activity of I fallout from thermonuclear testing ten days af ter explosion.

i r- In addition, the half-life of each is sufficiently long that errors are not introduced by delays in analysis. Potassium-40 was chosen as a calibration. monitor and should not be consided a-radiological' impact indicator.

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!' t Thirdly, during the year 1976 a major change in the technical specifications took effect. Northern States Power

Company, Nuclear Support Services Department, received approval 1

from the Nuclear Regulatory Commission (NRC) for an amendment to i the technical specifications to the operating license dated 20 May 1976. This amendment changes the Radiation Environmental 4

Monitoring Program to conform with the indicator-control concept l' suggested by NRC guidelines. The revised program is believed to constitute an improved means of assessing the performance of the

plant with respect to the goal of keeping population exposure as i low as practical. The prechange.and postchange programs are dis-

cussed in the following two sections. Their important features 4

are summarized in Tables 1 to 4.

l B. The Prechange Program

The locations used in the prechange program are listed in Table 1. The sampling and analysis schedule is summarized in Table 2.

The program monitored ambient radiation' levels using CaF2 :Mn thermoluminescent dosimeters (TLD's) and film badges.

[- Fourteen locations were monitored by each. The sensors were col-lected and measured every -four: weeks.

3 Airborne particulates were collected.on membrane filters by continuous. pumping at eight locations. Airborne iodine was 3

collected by continuous pumping through carbon-impregnated filters.

4 All filters were collected and counted weekly. The particulate-

! fi filters were analyzed for gross beta-activity. The carbon-impreg-E III-2

NALCD CNVIMCNMONTAL OClONCCO nated filters were analyzed for iodine-131 by gamma spectrometry.

A monthly composite of all particulate filters was gamma-scanned on a Ge(Li) detector.

Precipitation was collected monthly at two locations and analyzed for tritium (by liquid scintillation counting),

strontium-90, iodine-131 (by gamma spectrometry), and other gamma-emitting isotopes.

Milk samples were collected quarterly from eight farms five or more miles from the plant site and monthly from four .

farms near the plant. They were analyzed for iodine-131.and stron-tium-90 by highly sensitive ion-exchange resin techniques and beta counting. Each sample was also gamma-scanned (NaI). During the grazing season (beginning May 30), weekly samples were collect-ed at the four nearest farms and analyzed for iodine-131.

The terrestrial environment was also monitored by collections of well water, edible cultivated crops, small game animals, natural (field) vegetation, and topsoil. As indicated l

in_ Table 2, each sample was analyzed for one or more of the

! following: gross beta activity, tritium and gamma-emitting l

isotopes. In some samples iodine-131 was determinted by gamma-scanning promptly after arrival in the laboratory.

The aquatic environment was monitored by campling of 3

river water, lake water, fish, clams, plankton or algae or

., aquatic insects, aquatic vegetation, bottom sediment, and topsoil i i; e

from fields irrigated with water taken~from the Mississippi River downstream of the plant. As indicated in Table 2, each sample III-3

NALCO ONVIRONMONTAL OCl3NCCO was analyzed for one or more of the followings gross beta -

activity, tritium, strontium-90 and gamma-emitting isotopes.

C. The Postchange Program The locations used in the postchange program are listed in Table 3. The sampling and analysis schedule is summarized in Table 4.

The postchange program differed from the prechange program in several respects. The locations monitored were revised to conform with the indicator-control concept. Table 4 indicates which locations are the control locations. There were also changes in parameter.:. sampled, analyses made, and collection i

frequencies. Parameters dropped were river water at the St. Paul intake, lakewater at local lakes, precipitation, and film badges.

Parameters added were drinking wat er (Minneapolis water supply),

shoreline sediment, and leafy green vegetables. Some gross beta analyses were discontinued, while some analyses for strontium-89 and -90 were added. Some quarterly collections were changed to semi-annual. Milk collections became monthly at five locations.

Samples from the control farm (M-10B, Kirchenbauer) and the highest x/O farm -(M-18B,Olson)were analyzed for iodine-131, strontium-89 strontium-90, and gamma-emitting isotopes. Other milk samples were analyzed only for iodine-131. The method of airborne iodinc aollection was altered: charcoal-filled cartridges

, replaced carban impregnated filters. Additional differences are detailed in Table 4. The analysis techniques were the same as those used in the prechange program.

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NALCO CNVIRCNMONTAL CCIONCCC o

D. Changeover Date For- the sake of continuity and to permit valid com-parisons with environmental data in previous semi-annual programs, the nominal changeover date from the prechange program to the postchange program was 1 July 1976. This applied to all parameters sampled with the following exceptions:

1. Samplings of air particulates and airborne iodine continued at the prechange locations until 31 August 1976 (to permit time for installation of the new pumping stations) .

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2. The exposure of TLD's at the prechange locations continued until 6 July 1976 (to permit conclusion of a scheduled monthly sampling period). The quarterly sampling period required under the postchange program began 6 July 1976 at the postchange 1ccations.

3 .' Film badge uposure continued until 4 July 1976

-(to permit conclusion of a scheduled sampling. period) .

4. The first collection of shoreline sediment (an added semi-annual parameter) was on 22 June 1976.

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, NALCD ENVIRONMENTAL DCIENC00 IV. Results and Discussion '

All of the scheduled collections and analyses were made except those listed in Table 5.

Because of the midyear program change, data for the year 1976 are summarized in two separate tables, 6 and 7. Table 7 presents results for the postchange program in the format recommended by NRC Regulatory Guide 4.8. For each type of analysis of each sampled medium, this table lists the mean and range for all indicator locations and for all control locations. The location with the highest mean and results for this location are also shown.

Results for the prechange program are presented in Table 6 in a slightly modified format. Since the prechange program was not based on the indicator-control concept, all locations have been treated as indicators in Table 6.. Furthermore, in place of control location data, mean values of data obtained in the comparable period (January to June) of the preceding year are presented wherever possible.

A. Prechange Period In this section an assessment of the environmental impact of the plant during the prechange period is made by two types of comparisons. Data for the 1976 prochange period are compared with data for January to June 1975. As reported in . the semi-annual op-

.A erating report for that period (Northern States Power Co. 1975),

none of the media sampled then showed any clevated radioactivity attributable to plant operation (with the- possible exception of

. milk from the nearest farms).. Secondly,_where possible, comparisons IV-1 i

NALCO CNVIRGNMCNTAL OCICNCCO are made between locations less likely to be affected by plant operation and those more likely to be affected; e.g., upstream or distant locations are compared with downstream or nearby locations.

In comparing 1976 and 1975 data, the change in analytical laboratories on 1 January 1976 must be kept in mind. Analyses of split samples by both laboratories yielded significant differences in some cases. Activities measured by NALCO ES were typically in the range 0.25 to 2 times activities measured by MDH. An inde-pendent consultant (Barber 1976) attributed these differences to difficulties inherent in the measurement of the extremely low activities typical of environmental samples. The consultant noted that the expectations of error in environmental sample analysis are "a factor of two to.three for specific nuclide analyses" and "a factor of two to five for gross beta particle analyses." He cited differences in sample thickness and in cali-bration nuclides as partially responsible for differences in the results obtained by the two laboratories. With regard to gross beta activity, he concluded that the measuring techniques employed by NALCO ES were such as to-yield results which " approximate more closely the actual concentrations of gross beta activity in envi-ronmental samples."

The data in Table 6 indicate that 1976 mean gross beta activities ranged from 0.19-to 0.55 times-1975 activities-in the following media: natural vegetation, topsoil, aquatic insects, IV-2 1

NALCO CNVIOGNMONTAL OClONCOO aquatic vegetation, and bottom sediments. In split-sample analyses of the same media, NALCO ES results were typically 0.18 to 0.56 times MDH results. In well water, river water, and lake water, 1976 mean gross beta activities were 0.29-to 0.68 times 1975 activities. In the split-sample analyses of these media, NALCO ES results were typically 0.29 to 0.77 times MDH results. No split-sample analyses were made of air particulate filters, precipita-tion, or fish, but .the.1976 results for _ these media were all substantially lower than the 1975 results, 0.41, 0.05, and 0.36 times the 1975 results respectively. Thus, comparison of 1976 with 1975 gross beta data indicates no effects attributable to plant operation in the prechange period.

Split-sample comparisons for cesium-137 and tritium are also available. In split-sample analyses of milk, NALCO ES results were typically 1.3 to 3.3 times larger than MDH res'ults.

In 1976 the mean activity of cesium-137 in milk was 0.27 times that reported in 1975. This comparison indicates a substantially reduced level of cesium-137 in milk in 1976. In natural vegeta-tion, split-sample analyses for cesium-137 yielded NALCO ES results 0.45 to 2.0 times MDH results. The 1976 result, 2.3 times the 1975 average, is thus not indicative of any significant change in cesium-137 activity in natural vegetation. Split-

', sample analyses of lake and well water for tritium yielded NALCO

, ES results 0.45 to 1.4 times MDH results. The 1976 results for precipitation and lake, well, and river water ranged from 0.33 to 0.91 time's 1975 results,-again indicative of no significant IV-3

1 NALCO CNVI?ONMCNTAL OClGNCOO

, s change in activity levels.

Although split-sample comparisons are not available for other measurements, in all other cases where similar analyses were performed in both years, measured 1976 activities were approximately equal to or lower than measured 1975 activities.

For example, in both periods airborne iodine-131 levels were <0.02 pCi/m3 In milk, iodine-131 activities were all <0.25 pCi/l in 1976, in agreement with levels reported for distant farms in 1975.

Strontium-90 in milk averaged 6.1 pCi/l in 1976 and 6.9 pCi/l in 1975. Film badge results for the two periods were equivalent.

Finally, the 1976 TLD measurements averaged 4.3 mrem /28 days while those in 1975 averaged 4.2 mrem /28 days.

Thus, none of the activities observed in the prechange program in 1976 indicate any significant increase over the back-ground-level activities reported for January to June 1975.

The conclusion that there was no significant plant effect on the environment during January to June 1976 is rein-forced by comparison of nearby or downstream locations with distant or upstream locations. In several cases the highest activities were measured at the distant locations. In all other

, cases except one the differences were approximately equal to the counting error or the results: to be compared were below detection limits. The one exception was gross beta activity in clams collected in May 1976 at the Mississippi River upstream and i

downstream sites. Flesh of the downstream sample had a gross beta activity of 0.88 1 0.06 pCi/g wet weight, while the activity of the upstream sample was 0.21 i 0.05 pCi/g wet weight.

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NALCD ONVIRONMONTAL OCIONCOO e

However, this difference does not necessarily indicate.a plant effect. In preoperational studies at the Monticello and Prairie Island Nuclear Generating Plants, gross beta activities are report-ed for seven clam samples (Minnesota Department of Health 1970, 1971, 1972, 1973). The average reported activity was 10.5 pCi/g wet weight and the highest activity was approximately eight times the lowest. The large apparent drop between the MDH average and the NALCO ES 1976 results may not be a real drop since it could arise from a difference in measuring techniques.

However, the factor eight ratio of-MDH results may be-taken as a valid indication of the inherent variability of radiciosotope concentrations in clams exposed to background sour N only.

Thus, the 1976 factor four ratio between downstream and upstream samples does not necessarily indicate a plant effect. Further-more, gamma scans of the two May 1976 samples yielded activities of zirconium-95, cesium-137, and cerium-144 below detectable limits.

In summary, there was no indication of a radiological impact ~of the' plant on its environment during the prechange program approximately covering the period January to June 1976.

B. Postchange Period The-environmental-. impact.of the plant in the postchange period may be assessed by comparing results at indicator and control locations.

1 i Examination'of Table:7 shows no significant differences between indicator and control locations. .In many cases mean IV-5 l

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values were higher at control locations. This occurred for TLD readings; for strontium-90 in milk and algae; for cesium-137 in

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milk, small game flesh, natural vegetation, and aquatic vegetations and for zirconium-95 in bottom sediment. In some cases mean values

were higher at indicator locations. In all such cases, however, the differences were not significant in comparison with typical 3 errors encountered in such measurements. For example, for air 1 particulates, gross-beta analyses yielded an average of 0.093

) pCi/m3 at indicator locations and an average of 0.088 pCi/m3 at l control locations. The difference is eqhal to the typical counting error of an individual analysis. Similarly, for well water, the indicator average for tritium, 470 pCi/1, differs from the control average, 370 pCi/1, by the typical-counting error. Finally, in many cases both indicator and control results are less than lower limits of detection.

Some of the individual analyses in the post-change pro-gram yielded results elevated ~ above typical levels. Elevated iodine-131 results were observed in airborne iodine at M-1B

{ (control) on 12, 19, and 26 October and on:2 November 1976 and at d

M-5B and M-7B (indicators) on 26 October and 2 November 1976.

! Also, elevated iodine-131 levels were observed in milk samples collected 19 October 1976 at M-10B, the Kirchenbauer farm (control) '

and at M-24B:and M-25B, the Nelson and Shovelain farms = (indicators) .

In the same time period, substantial increases in gross beta activ-

, ity were observed i'n air particulates collected at both indicator and control stations. . Since in all of the above cases - the control IV-6

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Table 1. Prechange sampling locationsa. Monticello Code Name Incation M-1A Station M-1 11.1 mi @ 306*/NW M-2A Station M-2 3.8 mi @ 334*/NNW M-3A Station M-3 6.4 mi 9 290*/WNW M-4A Station M-4 0.6 mi @ 100*/E M-5A Station M-5 10.4 mi @ 106*/ESE M-6A Station M-6 12.4 mi @ 133*/SE M-7A Station M-7 8.8 mi @ 39'/NE M-8A Station M-8 10.3 mi @ 227'/SW M-13A Station M-13 0.6 mi @ 242*/WSW M-14A Station M-14 0.4 mi @ 155'/SSE M-15A Station M-15 0.8 mi @ 100*/E M-16A Station M-16 0.9 mi @ 321*/NW M-17A Station M-17 0.7 mi @ 250*/WSW M-18A Station M-18 1.7 mi @ 110*/ESE M-19A Mississippi River, 0.2 mi @ 285'/WSW 1000 ft. upacream of plant M-20A Mississippi River, 0.4 mi 0 62*/ENE 1000 ft, downstream of plant M-21A St. Paul Water Intake 35 mi @ ll6*/ESE M-22A Big Lake 4.6 mi 9 90*/E M-23A Locke Lake 5.6 mi 9 202'/WNH M-24A Gauthier 1.3 mi @ 130'/SE M-25A Schultz 1.2 mi @ 249'/WSW M-26A Swanson 1.5 mi 9 277'/W M-27A Trunnel 0.3 mi @ 214*/SW M-28A Plant Well #1 0.2 mi @ 267'/W (on-site)

M-29A Plant Well #2 0.2 mi @ 267'/W (on-site)

M-30A City of Monticello 3.2 mi @ 128'/SE M-31A Meteorological Station 0.6 mi @ 100'/E M-32A Minnesota Dept. of 40 mi @ 126*/SE Health Bldg.

M-33A Plant Site (on-site) On-site M-34A Heberling Farm 12 mi @ 258'/WSW M-35A Field #1 0.8 mi 0 100'/E M-36A Field #2 0.7 mi 0 198'/SSW M-37A Field #3 1.1 mi 0 280*/W M-38A Dechene Farm #1 4.7 mi 9 ll8'/ESE M-39A Dechene Farm #2 4.7 mi 9 ll8'/ESE M-40A Ewing Farm 4.9 mi @ ll5'/ESE M-41A Dwinger 13.0 mi @ 335'/NNW M-42A Kirchenbauer 11.5 mi @ 323*/NW V-1

NALCO CNVIRENMONTAL OCIONcGO

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Table 1. (continued) Monticello i

Code Name Iccation M-43A Kotilinek 5.6 mi 9 230'/SW M-44A vandergon 8.3 mi 9 247'/WSW M-45A Holland 8.1 mi e 199'/SSW M-46A Hopkins 7.6 mi 9 193'/SSW M-47A Becker 10.0 mi 0 130*/SE M-48A Vetsch 9.4 mi 9 128'/SE M-49A Nelson 2.4 mi 9 269'/W M-50A Olson 2.5 mi e 24*/NNE

M-51A Peterson 2.3 mi @ 111'/ESE 4

M-52A Shovelain 3.0 mi 0 250'/WSW

Locations in use prior to effective dates of changes made by 5-20-76 revision of technical specifications.

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l Table 2. Prechange sample collection and analysis program a. Monticello Collection Analysis Locations. Type and Type (and Medium No. Codesu Frequency C Frequency)d TLD's 14 M-1A to M-8A C/EFW Ambient gamma M-13A to M-18A dose Film badges 14 In duplicate at Z C/EFW Ambient beta- ) l M-1A to M-8A; gamma dose P single badges at 6

. on-site locations - h E

. Airborne particulates 8 M-1A to M-8A C/W GB, GS (MC of all locations) -

3 Airborne iodine 8 M-1A to M-8A C/W I-131' Precipitation 2 M-31A, M-22A C/M GB, H-3, Sr-90, I-131, GS Z l Milk 8 M-41A to M-48A G/O I-131, Sr-90, )

p GS i 4 M-49A to M-52A G/M (except I-131, Sr-90(Q),  !,

grazing season GS g i

G/W (during I-131, Sr-90 (Q) grazing season) 2 GS (M) O  !

a Well water 7 M-24A to M-29A G/O GB, H-3, GS 8

l Edible c*2ltivated 3 M-38A to M-40A G/A GB, GS crops

,' Small game animals 2 M-33A, M-34A G/SA GS (Liver and Flesh)

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1 b Table 2. (continued) Monticello Collection Analysis Locations. Type and Type (and Medium No. Codes" FrequencyC Frequency)d Natural vegetation 3 M-35A to M-37A G/SA GB, I-131, GS Topsoil 6 M-35A to M-40A G/SA GB, GS g M-19A to M-21A G/W GB, H-3 (MC) , r' River. water 3 GS U O

M-22A, M-23A GB, H-3, GS E Lake' water 2 G/Q Z Fish (Flesh and Bones) 2 M-19A, M-20A G/Q GB, GS b 3

Clams 2- M-19A, M-20A G/Q GB , GS ag Plankton or Algae 4 M-19A, M-20A, G/SA GB, Sr-90, GS or Aquatic Insects M-22A, M-23A z Aquatic vegetation 4 M-19A, M-20A, G/Q GB, GS 7

M-22A, M-23A B ~

' n Bottom sediment 4 M-19A, M-20A, G/SA GB, GS g M-22A, M-23A g

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8 a Program prior to effective dates'of changes made by 5-20-76 revision of technical

' specifications.

b c

. Location codes are defined in Table 1.

i Collection type is coded as follows: C/ = continuous, G/ = grab. Collection fre-

'quency is coded at follows: W = weekly, EFW = every four weeks, M = monthly,

! -Q = quarterly, SA = semi-annually, A = annually.

j d Analysis type is coded as follows: GB = gross beta, GS = gamma spectroscopy,

H-3 = tritium, Sr-90 = strontium-90, I-131 = iodine 131. Analysis frequency is specified only if different from collection frequency. Analysis frequency is

-coded as follows: M = monthly, MC = monthly composite.

j NALCO CNVIRONMONTAL OCICNCCO Table 3. Postchange sampling locations a. Montice13o Former Code Name Location Code M-1B Station M-1 11.1 mi 9 306'/NW M-1A M-2B Station M-2 8.8 mi 9 39'/NE M-7A 1 M-3B Station M-3 0.7 mi 9 353*/N M-4B Station M-4 0.8 mi 9 23'/NNE

M-5B Station M-5 0.5 mi 9 181'/S M-6B Station M-6 0.9 mi 9 150'/SSE -

M-7B Station M-7 2.7.mi @ 136'/SE M-8B Upstream of Plant 0.2 mi 9 285'/WNW M-19A-(1,000 ft.)

! M-9B Downstream of Plant 0.4 mi 0 267'/W M-20A (1,000 f t )

M-10B Kirchenbauer Farm 11.5 mi 9 323*/NW M-42A M-llB City of Monticello 3.2 mi"9 128*/SE M-30A l

M-12B Plant Well il (on-site) 0.2 mi 9 267'/W M-29A i M-13B Trunnel Farm 0.3 mi 9 214'/SW M-27A

M-14B City of Minneapolis 36 mi 9 128'/SE

M-15B Montisippi Park 1.6 mi 9 ll7'/ESE M-16B Plat.t Site (on-site) On-site-. M-33A

M-17B Heberling Farm 12 mi 9 258'/WSW. M-34A M-18B Olson Farm 2.5 mi 9 24*/NNE M-50A M-19B Plant Site Area 1.0 mi 9 323*/NW 1.2.mi 9.134'/SE M-20B Gillespie Residence M-21B Ewing Farm 4.9 mi 9 ll5'/ESE .M-40A M-22B Dechene Farm 4.7 mi 9 ll8'/ESE M-38A M-23B Bohanon Farm 1.2 mi 9 156*/SSE M-24B Nelson Farm 2.4 mi 9 269'/W M-49A M-25B Shovelain Farm 3.0 mi 9 250*/WSW M-52A M-26B Peterson Farm 2.3 mi 9 lil'/ESE M-51A l a Locations in use after effective dates' of changes made by 5-20-76 revision of technical-specifications. '

.g h n 4

1 f

4 i t V-3

.___ - -,- - - _ m _.,,r._.~ -

,yr- n , ~ , .~.,,-ye -. , - - . - 3 .-py~~ .,y,

._. . . ~ , .. -

. .i Table 4. Postchange sample collection and analysis programa. Monticello Collection Analysis 1 Incations Type and Type (and Frequency c Frequency)d

-Medium No. Codes (and Type)D TLD's 7 M-1B (C) , M-2B(C), C/O Ambient ganuna M-7B dose Z-M-1B(C), M-2B (C) , C/W GB, GS (MC of A Airborne particulates 7 M-3B to M-7B all locations) h

' D

-Airborne iodine . 3 M-1B (C) , M-5B, C/W I-131 g ,

i M-7B g Milk '3 M-24B to M-26B G/M I-131 j O

2 M-10B(C), M-18B G/M I-131, Sr-89, Z

_4 Sr-90, GS { ,

.8

.s E

'4 M-10B(C), M-llB to G/O H-3, GS 2

! Well water j

' M-13B t-Edible cultivated 2 M-10B(C), M-20B G/A I-131 e O ,

crops - cabbage e i

.. Edible - cultiva ted 4 M-10B(C), M-18B, G/A GS Z D

crops' . potatoes M-20B'to M-23B and/or corn g Small gdme animals 2 M-16B, M-17B (C) G/SA GS (Liver and Flesh) 1 Natura1' vegetation 3 M-10B (C) , M-18B, G/SA I-131, GS M-19B l

1

Table 4. (continued) Monticello Collection Analysis Locations Type and Type (an Medium No. Codes (and Types)D Prequency c Frequency)g Topsoil 12 M-1B (C) , M-2B G/ETY GS, Sr-90 to M-7B, M-18B to M-21B, M-26B g

)

River water 2 M-8B (C) , M-9B G/W GS(MC), H-3(QC) t-O Drinking water 1 M-14B G/W GB, GS(MC), H-3 0 (OC), Sr-89 (OC) , N Sr-90 (QC) 2 Fish (Two species, 2 M-8B(C), M-9B G/SA GS 3 Flesh and Bones)

Clams 2 M-8 B (C) , M-9B G/SA GS Z

Algae or Aquatic 2 M-8B(C), M-9B G/SA Sr-89, Sr-90, GS g

Insects Aquatic vegetation 2 M-8B(C), M-9B G/SA GS Bottom sediment 2 M-8B (C) ,. M-9B G/SA GS l0 Shoreline sediment 1 M-15B G/SA GS N e

^

Program after effective dates of changes made by 5-20-76 revision of techaical b 8Pecifications.

Location codes are defined in Table 3. Control stations are indicated by (C).

All other stations are indicators.

c Collection type is coded as follows: C/ = continuous, G/ = grab. Collection frequency is coded as.follows: W = weekly, M = monthly, O = quarterly, SA =

semi-annually, A = annually, ETY = every three years.

d Analysis type is coded as follows: GB = gross beta, GS = gamma spectroscopy, H-3 = tritium, Er-89 = strontium-89, Sr-90 = strontium-90, I-131 = iodine 131.

Analysis frequency is' coded as follows: MC = monthly composite, QC = quarterly composite.

NALGO CNVlMONMGNTAL CCIONCCO Monticello Table 5. Sample collections-and. analyses missed, p.rechange and postchange programs, 1976.

Sample Type Date or (Analysis)a Location b Period comments TLD M-2A 5/13-6/08/76 Lost in field M-3A 4/13-5/13/76 Lost in field M-14A 5/13-6/08/76 Lost in field .

M-16A 12/23/75-1/20/76 Lost in field M-6B 7/06-10/05/76 Lost in field Fish M-19A, M-20A First quarter No sample obtained due to ice conditionsc Clams M-19A, M-20A First quarter No samples found when collection attempted Aquatic M-19A,-M-20A, First quarter No samples found Vegetation M-22A, M-23A when collection attempted Milk (I-131) M-50A 5/11/76 No I-131 data due to counter mal-function, i

l a Analysis listed (in parentheses) only if it was missed.

l b Location codes are-defined in Tables 1 and 3.

c Substitute collection made 4-15-76.

I V-5 L .

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

. ._ / .- * .s e

of Table 6. - Environments! madiological Monitoring Program Stummary-Prechange Program.

Name of facility Monticello Nuclear Generating Plant Onchet No. 50-263 Location of facility wright. Minegsota poporting period Jan.-June 1976 farwrominate-ICounty, at: ate) see test, Section 111.D.)

e Indicator Location with Highest e Mean sammener of Sample Type and incationg han(F) 1975 non-rowtjan E .

' Type . Mtamber of Mean(F)

(Units) Analysee* LM manged location

• mange an.. f meeelts 9 )

F*

Tla Gasman - 94 1.5 4.3(94/94) M-1A 5.3(7/7) 4.2 e g [

(area /28 days) (3.4-5.9) 11.1 mi 306* lat (4.5-5.9) g i Pilm badgeh I

Gamma-beta 10 (LLD - -

<10 e g (arem/28 days) 154 ,

g Air CB 200 0.002 0.029(280/200) M-7A 0.033(35/35) 0.071 0 (

partiglates (0.009-0.0651 8.8 al 39' NE (0.019-0.065)

I (pC1/m )

c: 0 Air particulates, y scan. ,8 Z -

month 1y com- . K-4 0 - 0.003 ( LED - - - 0 3 posites of all g

- - - 8 locati ns (pC1/m )

Er-95 0.0012 (Ltm Z

Co-137 0.0003 0.0005(5/8) - - 0.0009 9 ~4 (0.0003-0.0006)  %

T co-144 0.0016 0.002(1/8) - - - 0 W ,

Airborne I-131 280 0.02 (LLD - - <0.02 8 0 I

iodine E (pC1/m3)

Z -

Precipgtation GB 12 20 266(12/12) F 283(6/6) 5400 6 g i (pci/m ) (140-300) (- *1 126* SE (170-360) .

g j Sr-90 12 11.5 22(5/12) MDH 27(3/6) 49 e E

= (12-54) 40 m3 126* SE (12-54) e N i

i b

! ' y> , r } ir* h' i ZgIOQ EZ(a 3D2{EZ f5gE2 GEE m

m.

m

. m e a fotn 'ot r

8

• e

• e e e e e

m. m P ra.ienm e 0

~

e g

n h a

. a h

= c e

r P

g 5, 7 - -

7, . - _ - 2 9 1 9, 3 1 ,, 7 0 6 9 4 9 I

._ ) )

, )

) 0 0

) ) 1 2 )6)6 3 J t F, 2 2323 )

_.  ! , )0 60 s 69 - /3 /1/1 -

n, - - - ) .

e , /4 21 2 2 - /1 h a 6 ( - (0(0 6 -

6 -

_ s' eg /

1 (0 57 0200 ( 0

_ a M ( 00 4343

2. 4 H 0 42 19 3131 5 3( 1( 1(1( 7(

h tn ia we B t w e

W WS E

S nM s n s

S WS E o e, i

n* * * * *

• t . 6 5 7 3 1 a g o0 2 3 4 1 1 c g i0 3 .n2 - 1 1 -

o , - - - t1 a

- o n L

,c i ri 9i s l ol

• g ti sm m em g

rmnm e i sa r

=

6 n dn 3. kp 5 t e3

=

t H i 1

e0 00 w3 a9o7 e2

• M n4 o1 V n P

=

=

i

+

=

rg C

= ))

on) ) )) 00 ))

- toFd 1) 62 40 03 e

iaag ai(

ctm )

2 )0 1

/84 1

0 2

/3 61

/4 91 4 -

4

/0 91 r dcsa 1

- 2 - (0 3 -

a noMR /8 2 - a 1

0 al (2 06 D (7 h

It m LD i D L. (4 i (0 5 L 1. 2

. 70 21 L

L 4. 2 L L 7 L 9 1 e ( (

t

< 7(

7 < 2( < 6( 1( < 6(

k s

n

. i t

a c 0 5 i

t n

o M ,0 0 5

1 0

1 3

0 3

0 1

0 0

2 0

1 1

2 0

6 0

0 2

1 5

2 5

2 c

s 1 5 6 0 y 2 5 2 4 t 1 1 i d f* .

.l i

nos a e 7

) c rs 7 4 n 5 3 da e y n 5 1 3 4 1 0 a 0 9 1 ef u y* nal p a c

0 4

9 3

1 1

1 o

- 3 1

9 c

s -

4 - -

r o T>A sy - E r - o 3 nf i o t I c c -H - r y

K s c t

I S ne

. om cm (u n m

o i

t a

. t ) )

6 ) i) 1 e s p. 1

/ /

e l et it i ki l ppi cn b myn eo cp lc ip a

saTU( rc ( M(

T P(

f

<3np c:

4 a l ,j j; i qi l' ,< . d 4

Table 6. '(continued)

Name of facility Monticello Nuclear Generating Plant Prechanale Prc4Eram Indicator Location with Mighest Mean he of sample Type and location 1975 8hs=ber ofa Meant i Mean(r) son-rooti g,,,gg,,ne

Tyr'" .

ggy gg,,,, g ,e.gg ,p j gi,,9 , ,,,,,f (Unita) Analysem Z.

Milk (cont.) Cs-137 shovelain 7.2(6/6) )

p 3.0 mi 250* MSw (cont.) (4.3-9.1)

O Ce-144 60 (LID - -

O us11 water M.

(pC1/1) CP 14 0.5 1.9(14/14) Plant well 92 2.6(2/2) 4.7 e a (0.5-2.9) 0.2 mi 267* w (2.4-2.0) ,

4 H-3 14 200 430(10/14) Plant well 11 610(1/2) 470 e 0 (210-690) 0.2 mi 267* w I

• O W y scan 14 7

K-40 120 (L1D -- - - e $

- 0 N

25 -

(Lib Z

tr-95 Cs-137 2.5 (LLD - -

1.s e Ce-144 60 < Lib - - - e (=

snail Game y scan 2 E, '

Animals Q 1.0 .2.0(2/2) neberling 2.0 (1/1) - e Liver K-40 (1.9-2.0) 12 mi 258* WSW E (pC1/g wet)

Z.

3r-95 0.51 , < 1.'" - - -

• n e

E i Cs-137 . 0.07 (Lim - - -

Ce-144 0.56 (Lib - - - e i8 '

.;t 1

41 l i-f i.

3 S :m "

. _ _ . . -. . _ _ . . _ . . . . . . . . _ . ,_ .m.._ _ _._._.,m _ . . - = . . _ _ . ._ . . _ . . . _ . . . m. . __ __ . . . . _ . . . . -

%-- p

.- . .J ,

t i

i

$ Table 6. (continued) Prechange Programs Name of facility Monticello Nuclear Cenarating Plant Indicator Location with Illghest tescationge Mean sammhet of sample Type and non-routine

"=r of Mean(F) 1975 Type Analyses

• M Mean(r}'

mange temation* stange staan f asset t e *

(Unite) 2 Small Came y scan 2 g Animals (cont.1 e I 2.9(1/11 i

riesh E-40 0.02 2. s (2/2) neberling -

O (pcl/g wet) (2.6-2.9) 12 mi 258* wsw O

<um - - - e sr-95 0.16 E Cs-137 0.003 0.03(2/2) Flant site 0.03(1/)) - e Z

, (0.03-0.03) (on-site) ( ~

~4 seeberling 0.03(1/1) t i 12 mi 253* Wsw 3 ch O Ce-144 0.08 (UD - - - -0 Z

3 Natural GB 3 1.4 12.3(3/3) rield il 15.4(1/1) 66 e g i vegetation (10.1-15.4) 0.3 mi 100* E E

(pci/g dry) y scan 3 Z E-40 1.4 8.6(3/3) Field 81 10.9(1/1) - e (7.3-10.9) 0.3 mi 100* E p tr-95 0.29 <um - - - e 3 1-131 0.1 ' <um - -

<0.35 e i m

4 Cs-137 0.1 0.14(2/3) Field 91 0.15(1/1) 0.06 8 g l (0.12-0.15) 0.3 mi 100* E

, G m ,

Ce-144 1.5 (1.LD - - - 0 3 t

l l

.m._ .. . . . .. . _ ..m., ..- .-. . . . . _ . _. . _ .-. _ _. . . . . . . . . . .. . . ..m ._ . . . . . . . .. -. . . ..m a

a h t

~

. .l I

I i

Table 6. (continued) ..

r:=aa ra t i == ss==+

Prechange Program teams of f acility Monticello Muctaar

. 1- = tion with Highest Indicator er of ,

mean sample Type and tocationge mean (F) 1975 g . M Ine i seumber ofa Mean(F) Meam aseelts 9 l gpa Analysem M" Range d location

• Range Z

(Units) '

51 e g ca 6 1.4 13.2(6/6) Dechene 16.6(1/1) i Topsoil 4.7 al 118* ESE (pcl/g dry) (16.8-16.6) 0 y scan 6 0  !

- 4 E-40 1.4 9.7 (6/6) Swing 10.2 !*,/1)

E (9. 3-10.2 ) 4.9 mi 115* ESE e

Z 2r-95 0.04 0.00(6/6) Fland 31 0.10(1/1) -

f m (0.06-0.10) 0.8 al 100* E _

3 O 0.87(1/1) 0.19 0 Cs-137 0.02 0.43(6/6) Fleid 83 w

0 (0.15-0.87) 1.1 mi 280*

Z' -

- - - 3 Ca-144 0.2t (Lim 4.2(26/26) 6.S 9 E  !

River water C3 18 1 4.1(78/78) St. Paul Intake 2

(pC1/1) (2.7-5.4) 35 mi 116* ESE (3.5-5.1) ,

j f St. Paul intake 390(18/18) 450 e H-3 le 200 370(18/18)

(260-470) 35 mi 116' Est (260-478) I"  ;

g  !

i y scan '70

-- - - e _O

K-40 120 ~ < Lta a .

tr-95 25 < lim

- - - e g j D ,

- - 1.1 e i Co-137 2.5 . (Lim E

- - O g

< co-144 . 60 < Ltm -

i

f il l .

i

. .l

Table 6. (continued)

Hame of {sc1}ity Monticell > Nuclear Generatina Plant Prechange Programm Indicator location with Highest Type and Mean shamber of sample Type Number of location Mean(r) [ Mean(r) 1975 non-rootime Analyses

• LLd' Range d location

• Range semen f Reem1ts9 (Unita) Z Lake water CB 4 1 6.1(4/4) tocke take 6.7(2/2) 21 e )

(pci/1) (5.4-6.8) 5.6 mi 292* WNw (6.5-6.8) p H-3 4 200 360(4/4) Big take 410(2/2) '

450 e (300-440) 4.6 mi 90* E (300-440) 0 y scan 4 4 K-40 120 (LID - - - e (

G Zr-95 25 (LID - - -

e 3 M 0 Cs-137 2.5 (Lib - -

2.9 0 Co-144 60 (LLD - - - e g e 'E Fish CB 6 0.03 2.7 (6/6) Miss.-upstream 2.8 ( 3/3) 7.5 Flesh (1.9-3.5) 0.2 mi 285* WNw (2.1-3.5) 2 (pci/g wet) -(

' y scan 6 '

)

- I R-40 0.05 3.1 (6/6) Miss.-upetream 3.2(3/3) - e (2.5-3.6) 0.2 mi 285* WNw (2.7-3.6) E O

tr-95 0.28 -(LID - - -

e -

R Cs-137 0.01- 0.035(6/6) Miss.-upstream 0.042(3/3) - e~ 2 (0.021-0.059) 0.2 mi 285* WNw (0.025-0.059) g I Co-144 . 0.14 (LLD - - - O '

E E

Bones CB 6 0.5 5.9(6/6) Miss.-downstream 6.6(3/3) - 0 (pci/g dry) (3.2-7.5) 0.4 mi 267* w (5.8-7.5)

7 .-

Tablg 6. (opot$sene4) i Name of facility Monticelles Nuclear Generating Plant Prechange Program Indicator incation trith Highest Sample Type and locationgc Mean Mean{F)

Baumduer of non-routine type thenbar of Mean (F) lir75 (Unite) Analyses * . IM Range d Iecation* Range Mean pseult e 9 Fish Bones (con t.) y scan 6 E

h K-40 5.2 6. 2 (1/6) Miss.-downstream 6.2(1.6) - g T*

0.4 mi 267* W g tr-95 5.5 (LLD - - _ g 0 E

. Cs-137 0.39 (LID - _ -

• Z Ce-144 3.3 < 3.gm _ _ ,

4I g I

Class GB 2 0.02 0.55(2/2) Mise.-downstream 0.es(1/1) .

0: *

(0.21-0.88) 0.4 el 267* w (pci/g wet)-

y scan 2 g

K-40 0.3 < LID - - - 0 $ '

a tr-95 0.3 < LID - - - e g (LID - - - e Co-137 0.02

< LID - - - e I l Ce-144 0.2 22 - e E Asgustic GB 4 1.5 4.6(4/43 Miss.-downetream 7.3(1/1) 0 0.4 mi 62* rue Insects (pC1/g dry)

.(2.1-7.3) e g

Sr-90 4 0.64 < LtD - ..#

0.54 2

3 y scan . 4 Q

i R

! R-40 -

11.9 15.4(1/4) Big Lake 15.4(1/1) - O g 4.6 mi 90* E (LID - - - e l 3r-95 3.0 A .

9  % + r-- _ --_

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

e Table 6. (continued)

Name of f acility Monticello Nuclear Generating Plant Prechange Program i Indicator Location with HIchest sample Type and Locationac Mean seamber of Type Number of Mean (F) d Mean (F) 1973 non-routine  ;

(Units) Analysem a Ltd Range d Imcatione Raneg nemn f Resulto 9 2

Aquatic Cs-137 1.1 ( LID - -

3.6 6 )

insects p (cont.) Co-144 5.5 (Lib - - -

O g Aquatic GB .4 1.4 14.3(4/4) sig Lake 26.0(1/1) 54 . O vegetation (8.2-26.0) 4.5 mi 90* E E

(pC1/g dry).

i y scan 4 2

~

1 4 K-40 1.a 15.4(4/4) sig Lake 32.3(1/13 -

e -

3 (4.1-32.3) 4.6 mi 90* e E .

4

• O Q tr-95 1.1 < LID - - -

-e l Z

.Co-137 2.4 < LID - - - e g Ce-144 1.7' 1.7(1/4) Big take 2.7(1/13 - e E  ;

4.6 mi 90* E 2 '

4 Bottom ca '4 1.4 11.5(4/4) Miss.-downstream 12.s(1/1) 37 e i

sediment . (10.5-12.8) 0.4 mi 267* w g=- ,

(PC1/g dry) y scan- 4 E

' O R-40 1.4 '9.6(4/4) Miss.-upstream 10.4(1/1) -

S -

(9.0-10.4) 0.2 mi 285* tsNw E Er-95 0.09 .o.11(2/4) Miss.-upstream 0.11(1/1) - e O

(0.10-0.11) 0.2 mi 285* WesW

. R .

Cs-137 0.01 0.63(4/4) Big Lake 1.30(1/1) 1.0 .O E 4 (0.11-1.30) 4.6 mi 90* E 3

4 i-

i l *  !

i l

Table 6. (continued) Prechange Program Name of facility ' Monticello Muclear Generating Plant Z ,

Indicator location with Highest )

locationsC Mean assber of f sample . Type and i Mean(r)O Mean(r) 1975 non-routine Q Type Nisaber of Analyses

• 11Db y,,g. goc.ggo,p g. q, g,,,f Results' 0 (Units)

Miss.-opetream 2.22(1/1) - 0 -M Botton- Co-144 0.22 0.22(2/4g2) medleent- (0.22-0. 0.2 mi 285* M Miss.-downstream 0.22(1/1)

, 7 4i (con t. ) 0.4 mi 267* w '

(

On 3I a CB = gross beta.

O

'g b ' LIE = nominal lower limit of detection based on 3 sigma error for background sample.

c Since the prechange program was not based on the indicator-control concept, all locations have been treated as indicators in this table.

3 j 3 d Mean and range based on detectable measurements only. Traction of detectable measurements at specified l

locations is indicated in parentheses (r). g

• Incations'are specified (1) either by name or code (Table 1.) and (2) distance, direction, and sector relative to reactor site. Abbreviations used: MDH = Minnesota Dept. of Health Building, Met. = MeteoroloTy, Mise. = [

l

Mississippi River. F* i 4

f mesults listed are means over att locations of 6-month average values for period Jan.-June, 1975 as reported to Northern States Power Co. by the Minnesota Department of Mealth (Northern States Power Co., 1975). g '!

mesults below detection limits were ignored in computing means. If all results were below detectable O limits, the highest LLD is reported. See test section IV.A. for a discussion of differences between MON and Nalco ES measurements em split sagles. g ,

9 A result is considered nonroutine if it escoeds ten times the preoperational value for the location. 2 h Film badges were analyzed by R.S. Landauer, Jr. and Co., Clonwood Science Park, Clenwood, Ill.

1 All Jan.-Jt: no 1975 film badge readings were (10 mrom escept.two results believed to be spurious. Q R

S ,

4

, ._ ni n

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

r i

e I

i Table 7.' I:nvirorunental Radiological Monitoring Program Summary-Postchange Program.

Name of facility Monticello Nuclear Generating Plant Docket No. 50-263 location of facility Wright, Minnesota D* Porting period _ Julv-Dec _ _ 197s '= Tronimate-(County, state) see text,Section III.O.)

Indicator Incation with Highest Control '

Mean tocatione seedser of Type and Incations Sample Number of Mean(F)* Meantr) Mean (F) non-routim g tocationd

' Type Iteoulta' (Units) Analyses

• LIN Range d Range Range r-TID O (ares /91 days) Camma 13 3.0 16.4(9/9) M-28 20.2(2/2) 13.9(4/4) e 3

(13.3-20.3) 8.8 mi 39' ME (20.2-20.3) (15.5-20.3) Q 1

Air G8 118 f 0.002 0.093(84/84) M-58 0.101(17/17) 0.ose(34/34) 0 N partlegiatea. (0.003-0.294) 0.5 mi 191* S (0.011-0.284) (0.029-0.257) Z' (pC1/m 3) 4 Air y scan 4 3

' f q particulates, - Mone 0 0 monthly com- K-40 0.007

(ub -

2 posite of all e 2

0.0016 0.007(3/4) - - soone

,tr-95 locatip)s (pC1/n (0.004-0.010) M Cs-137 0.5005 (LID - - None e g 0.004(1/4) - - tame 0 Ce-144 0.003 0.04(4/32) M-58 0.04(2/17) 0.05(4/17) 0 I Airborne 1-131 499 0.02 .

1 Iodine (0.03-0.05) 0.5 mi 191* 5 (e.03-0.05) (0.03-0.09) g

} Milk' 1-131 27 h 0.25 (lib - - ( LED 0 h' g

(pci/1)

Sr-89 12 1.3 ,

(Lim - - (LLD 0 g Sr-90 12 0.6 6.0 (6/6) Kirchenbauer 3.5 (6/6) . s.5(6/6) 0 0 (4.4-9.5) 11.5 mi 323* tee (6.2-10.4) (6.2-10.4) M 3-1 i

1 1

_ _ _ _ _ _ _ . _ _ . . _ _ _ _ _ _ _ _ _ _ _ _ _ . _ . - _ - . . . . _ _ _ _ _ _ _ _ _ . _ . _ _ _ _ _ _ _ _ _ _ _ . _ - , . . . . _ _ _ _ _ _ . . _ . _ _ . _. ,, . m. . _ . .m.._m..m_ . . . . _ _ . . . . . . _ _ _ . . _. ..

e Table 7. (continued) POste W Progress Name of facility Mont* cello t%rtear canarmetan alma

• Indicator location with Highest, Control Mean Locatione hu4ser of Sample Type and Incationg Mean (F) fesan (F) non-routine Type Humber of Mean(F) d mange moeutte*

(Units) Analyses". M mange 0 Imcation Range Z.

Milk (cont. ) y scan 12 T*

K-40 120 126D(6/6) Olson 1260(6/6) , 1165(6/6) e Q a

(1100-1350) 2.5 mi 24* MNE (1100-1350) (960-1230) O

- - (LLD e g 3r-95 25 (LLD-l ' Co-137 2.5 4.9 (5/6)

(3.4-6.5)

Kirchenbauer 11.5 al 323* tot 8.5(6/6)

(2.7-10.9) 8.5(6/6)

(2.7-10.9) e (I

- (LW 6 0

Co-144 60 (LLD

) "9 y Well water H-3 8 200 470(5/6) Trunnel 520(2/21 370(2/2) 'O '

0.3 mi 214' sw (490-540) (370-370)

(pC1/1) (400-540) b y scan 3 3

- - <LLD e E-40 120 <LLD-25' - - <uo e >

.ar-,5 < Lw c

'Co-137 2.5 ~ <Lta - - (LLD 0 g

- - < Lm 0 0, .

Co-144 60 .<LLD m

Crops - corn y eran 4 2 (pci/g wet) a Q K-40 0.02 3.6 (3/3) Dechene 4.1(1/1) . 3.6(1/1) 3 *

(2.7-4.1) 4.7 mi 118* ESE g

!

• Bohanon 4.1(1/1) . g 1.2 mL 156* sst i

4 1

4

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

a 2

e i

l l  !

b t

t Tatste 7. (continued) ,

Meme of facility Moriticello souclear Generattrup P1ast Poetchev Prngresa F Indicator Imcations with Nighest Contret

[,W 1e Type and 1meetiong nean smentlene enesker of yype seimber of Meese(F) Neem {F) Mean(F) . M ime (Unite) maalrees* -U heage' locetlo*4 8*nge mange neemite" 2 i Crope - corn tr-95 0.9 (Lim - - < LID e ) [

(cont.)

o r

Cs-137 0.04 (LLD - - (Lib g Co-144 e.3 <um - - <um e O .

7 i Crope - y scan 2 [

potatoes 2 i

, 4 (pci/g wet). It-M 0.02 21.4(2/2) Dechene 22.9(1/1) 17.2(1/1) e (

I (19.S-22.9) 4.7 mi 118* ESE ==

4 3 i EU Er-95 0.9 (LID - - <us e O t

! Cs-137 e.e4 <tto - - < Lim 'e 2

Ce-144 c.3 <uD - -

<us e 5 '

E crope-. " ,: 1-131 2 0.o2 <um - -

<um e 2 (pC1/g wet) 4 i small Game y scan 2 '

Aalmels p Liver st-40 e 2.5(1/1) riset site 2.5(1/1) 2.4(1/1) e (pci/g set) (on-site) E O

3r-95 0.26 ' <IJa sober 11seg e.32(1/3) 9.32(1/1) e -

12 mi 250* assw E Co-137 (LID <um e 2

0.80 - -

g ,

Co-144 - 0.54 0.75(1/2) Plant site 0.75(1/1) < Lim' s E fori-site) S i

i 1

m . __.m . .- _ _ _ _ _ _ 4 .m. . _.....__.-m. m_ - . _ . . _m._..~._. _ ~ ~ . _ _ _ . , . - _ _ . _ _ _ . . _ - _ . . _ ._m.__.

t I

• [

I Table 7. (continued) esame og facility Monticello Noelear Generating rient Postcheave Program j Isulicator Imcatice with highest Control Sample Type and tocationg pesan Locattene h of Type gesamber of steen fr) stemn(r) Itemetri non-routine (unite) Analyses

• IM mange

• toestiond manage mange meestte*

2 small Game y seen 2 )

Animale (cont.) p  ;

Flesh E-40 0.02 2.6(1/1) Iteberling 3.2(1/1) 3.2(1/1) e g ,

(pC1/g wet) 12 mi 25e* wser 0

ar-95 o.e6 < LED - -

(LID e

_ R Co-137 e.ee3 e.02(1/1) Plant site 0.02 e.01(1/1) 2

. fon-site) (

e co-14e e.09 < s.tn - -

< t.to e E O staturel y scea 3 0 vegetation 2 (pC1/g dry) E-49 1.4 3.3(2/2)

(2.5-4.0)

Kirchenbemer 11.5 mi 323* Int 5.7(1/1) 5.7 (1/1) e g L E

2r-95 0.29 0.73(2/2) Flant Ares 19 mi 323* tes 0.8S(1/2) 0.94(1/1) e Z '

(0.59-0.99) 1-131 0.09 < LIs - -

(IJD e p l' Cs-137 0.19 c.11(2/2) Kirchenbaser 0.19(1/1) 0.19(1/1) e S

.(0.11-0.11) 11.5 el 323* tar

• g co-144 1.5 <tze - -

< Las e 5 alver water 38 - 3 4 200 360(2/2) . Deise.-downstream 340(2/2) 330(2/2) e 2  :

(pC1/1) *

(290-430) s.4 m1 267* w (290-4309 (230-300) g

. N y scan 12 E E-40 120 (LIA .- -

<LLo e 1

P

. _ _ _ , - - - . - - _ . . . . _ . _ . . . _ _ _ _. ._. __ . . _ . . . _ _ _ _ _ . . ._.___.m . . . , _ . .m m ._. . . _ ._ . , . . . . . __..._.._ - m_. _--__m.m.._

t 1

L 4

.I r i

Table 7. ..(continued) t

stane of f ac411ty Montleello Nuclear Generating Plant Poetcomme ge Program L '

Indicator Imcation with Nighest Control

! Sample Type and. Emeetiong mean Imeetione ser of saumber of Type Mean ( r) Mean ( #3 Mean(r) non-routine (Unite) Analyses

• LIM mange C 1meetiond Range manage steset te' alver water 2r-95 25 (I.LD - -

< Lie G 2

(cont.) )

Ca-137 2.5 < Lim - -

<LLD e r Co-144 60 < i.am - -

< i.am e O Drinking water GS 6 0.5 2.166/6) Minneapolis 2.1(5/6) soone e E (pci/1) (1.9-2.3) 36 at 120* SE (1.9-2.3) Z '

M-3 2 200 410(2/2) <

q 3 Minneapolis 410(2/2) enone e E (360-460) 36 mi 129* SE (360-460)

O 3 r sr-99 . 2 10 < Lta - - peone n

I .O j 4 Sr-90 2 0.3 0.5(2/2) Minneapolie 0.5(2/2)

Z (0.5-e.5) 36 mi 128* SE (0.5-0.5) soone e g y scan 6 E I Z

-40 12. <us - -

Mo.e e g  !

Er-95 25 < lim - -

sewee e I Ca-137 2.5 ,( IJA - -

stone E

Q Co-144 60- (lim -

88one e 1

E rish - Fleeft y scae 4 Z -

(pci/g wet) -

g I 6

m-40 0.05 2.9(2/2) seios.-dommetream 3.1(2/2) 3.1(2/2) e E (2.5-3.3) 0.4 mL 267* w (3.0-3.21 (3.0-3.2) E

, tr-95 0.08 (Lam - -

< Ltm e l

4

[

I A

i i

[

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

a e

Table 7. (continued)

Name of facility Mnnticello euclear Generating Plant

_ postchasure qmyogram Indicator Eucation with highest Control sample Type and Type member of Locationg Mean Imeetione num6er of Meanfr) N aegr}

(Unite) Analysee* M haeuse* tecetten d mange Non(F) m non-rootlee heemits'

1. 1eh - Flesh (cont. )

Co-137 0.01 0.0 34 (1/2) Miss.-dounstrean 0.034(1/2) Z 0.4 mi 267* w 0.027(2/2) 0 )

(0.020-0.033) g=

Co-144 0.ca <ta. - - -

<uo e U rish .Done (pC1/g dry) y scan 4 D K-40 1.0 5.4(2/2) E Mise.-doenetream 5.4 (2/2) 4 (5.1-5.6) 3.7(2/2) 0 2 0.4 mi 267* w (5.1-5.6) (3.7-3.7)

-Q 8

Er-95 1.1 < Lim -

(

t'1 - -

< 1.1,0 0 3 Co-137 0.25 <LLO - -

< s.t. O O Co-144 1.7 <uo - Z

< s.a.

g O

Clame y scan 2 (pci/s wet) E K-40 A.7 (Lim - -

< lim 0 2

.r.,, 6. 5 oa - .

_ 0 ,.

Co-137 0.1 (Lim - -

<LLO O E Co-144 0.0 ~< Lim - - D (lim 0 -

n19 e sr-es 2 1.7 <Ltm - - E (Lam (pcl/g dry)

Sr-90 2 0 g 9.4 0.56(1/2) Mise. upstream S.56(1/1) 0.44(1/1) 0 g 0.2 mi 205* tant E E

I

,N"9 tMAA,_

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I sic. - = -  :

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8 vb 9 9 9. 9 R

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=

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Ili ,

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$8 t i I

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5j

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l j -

ya "!2 n

b

. 2 2bn'. !n2 2

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. w .o D

k f 5:7) - 0 -

-2 R1 j$j,

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7 $

• S. .* 3 9 y ~ . .

.a n.a -

a.

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$ t _I :35  !!!

i e ahs - ,  %

t- ~ds a t V-7F F p

2 I

Table 7. (continued)

Isame of facility Monticello Mucteer Generating Plant Poetrhange ProTram Z

Indicator Location with Higinest Control sample Type and locatlone Meaa Type Iecetim>e asusber of I leumber of Meantr)C Mean{r) O (Unito) Analyses

• IM Range c goe.ggo,d Meen(r) non-romelam g,,,,

O mes.Its*

mottom or. Co-137 0.01 0.11(3/3) 58more Sediment Monticippi Park 9.13(1/11 s.96(1/1) e E (0.90-0.17) 1.6 mi 117' Est 4

I (cont.) 2 Co-144 9.19 <LLD - -

(LID 4 4 e Q 3

' b* ' Ga a groes Insta. . O

• 1.1s

• nominal lower limit of detection based on 3 sigene error for background sample Z Mean and range based upon detectable measurements only. Praction of detectable measuremente at specified 2P l locatione le indicated in perentheses (r).

d 2 Imcations are specified (1) either by name or code (Table 3) and (2) distance, direction, and sector E

• relative to reactor site. Abbreviatiano used: Miss. - Miseleelppi aiver.

soonroutine resulte ere those which esceed ten times the control station value. If no control station Z

.value is available, the result Io considered nonroutine if it exceeds ten times the preoperational walue for the location.

.4 p

I Data for frous enclended filterSamenery.

collected 11-09-76 et M-7s are considered unreliable because filter was torn and are I 9 T o low-volume collectione (11-09-76 and 11-16-76 at M-793 are excluded from hry. 3 h Three elevated I-131 levele seeeeured 16-19-76 and attributable to fallout fr a the Chinese awelear weapone g test on S-26-76 have been emeluded frome the Summmary since they are not representat!we of a plant ef fect.

These values were as follonnes M-198, 2.2318.14 pC1/1s M-243, 0.7629.13 pC1/1, M-25s, 0.96te.11 pcl/1. 3 g

O E

E

i 1  !

i,  !

i

i 1

}'..

i

• NALCO ENVIRONMENTAL SCIENCES VI.

1 4

_ References Cited _

i i

Barber, D.E. 1976.  !

i activity reported by two different laboratoriA comparati es. Minn at Northern States Power Co., Minneapolis, Available '

Minnesota Department of Health.

! 1970. ,

i mental radiation surveillance, Monticello NuclearAnnual report Generating Plant, Jan.1 through Decembe i

r 31, 1969 1971. .

j environmental monitorinPrairie Island Nuclear Generating Plant (

radiation surveillance, g program,1970 annual report, j

June 1, through December 31, 1970 1972. ,

environmental monitorinPrairie Island Nuclear Generating Plant t

31,-1971. surveillance,g program, 1971 annual report, radiation ,

i ,

i s

January 1,1971 through December );

1973.

4 . .

i i environm6ntal monitorinPrairie Island Nuclear Generating Plant radiation December 31, surveillance, 1972. g program,1972 annual report, ,

i i

January-1, 1972 through  !

NALCO Environmental Sciences. 1977  !

i i

i analysis data tables, January-December .

ant, complet6 1976

{ Northern Plant, States Power Co. 1975.  ;,

s throughcomi-annual June 30, 1975, operating report No.9, January 1Montice i 2

, 1975 i

i i

, f 1 1 l

i

.f .

I L

VI-1 -

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