Text

Annual Radiological Environ Rept for 1986
	ML20205H953
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Site:	Cooper
Issue date:	12/31/1986
From:	Trevors G; TELEDYNE ISOTOPES
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ML20205H959	List: ML20205H953; NLS8700117, Forwards Cooper Nuclear Station Annual Radiological Environ Rept for 1986;
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1 Nebraska Public Power District Cooper Nuclear Station -

Annual Radiological Environmental Report Environmental Radiation Monitoring Program January 1,1986 - Decemeber 31,1986 USNRC Docket Number 50-298 BG LL Prepared by TELEDYNE ISOTOPES

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GENERAL OFFICE

S Nebraska Public Power District " "'fsAfs'e74's*0^8a^ *** '"

m NLS8700117 March 23, 1987 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555

Subject:

Annual Radiological Environmental Report Cooper Nuclear Station NRC Docket No. 50-298, DPR-46 Centlemen:

In accordance with specification 6.5.1.F of the Cooper Nuclear Station Technical Specifications, Nebraska Public Power District submits the Cooper Nuclear Station Annual Radiological Environmental Report for the period January 1, 1986, through December 31, 1986.

In accordance with 10 CFR 50.4(b)(1), we are enclosing one signed original of the report for your use and one copy to the Regional Office and one copy to the NRC Resident Inspector.

Should you have any questions or comments regarding this report, please contact my office.

Sincerely, 4' CVors Division Manager Nuclear Support GAT:TEBirg Enclosure cc: U.S. Nuclear Regulatory Commission Regional Office - Region IV NRC Senior Resident Inspector Cooper Nuclear Station

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T TELEM NE ISOTOPES NEBRASKA PUBLIC POWER DISTRICT COOPER NUCLEAR STATION ANNUAL

SUMMARY

REPORT 1986 ENVIRONMENTAL RADIATION i MONITORING PROGRAM i

PREPARED BY TELEDYNE IS0 TOPES 50 VAN BUREN AVENUE WESTWOOD, NEW JERSEY 07675

- , , i REPORT APPROVED BY: L (Lvt b da MANAGyR ENVIRONMENTAL ANALYSIS DEPARTMENT

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TTELEDYNE -

ISOTOPES TABLE OF CONTENTS PAGE INTRODUCTION 1 LOCATION MAP 2 SAMPLING SCHEDULE AND ANALYSES 4 STATIONS AND RELATIVE POSITION TO ERP 6 PART I REMPS TABLE - ANNUAL

SUMMARY

OF ALL STATIONS OF THE ISOTOPES 8 0F INTEREST WITH YEARLY AVERAGE ACTIVITY, NUMBER OF DETECTIONS, STATION WITH HIGHEST AVERAGE, AVERAGE OF CONTROL STATION AND INCLUSIVE DATES OF ANALYSES PART II DI!CUSSION, IMPACT ON THE ENVIRONMENT AND STATISTICAL TABLES 22 FOR EACH QUARTER A and B. AIR PARTICULATES - GROSS BETA - GROSS ALPHA 23 C. CHARC0AL FILTER, I-131 33 D. COMPOSITE OF AIR PARTICULATE FILTERS - GAMMA 38 E. FISH 41 F. MILK - NEAREST PRODUCER 44 .

G. MILK - OTHER PRODUCERS 47 H. GROUNDWATER 50 I. RIVER WATER 53 J. AMBIENT RADIATION 57 K. VEGETATION - BROADLEAF 62 L. SHORELINE SEDIMENT 66 APPENDIX A. LAND USE CENSUS B. INTERLABORATORY COMPARISON PROGRAM C.

SUMMARY

OF DOSES TO A MEMBER OF THE PUBLIC 0FF-SITE D. OMISSION OF ANALYSIS ii

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PREFACE

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'N This report covers the period of January 1 to December 31, 1986. All '- '

. sample collections were made by a contractor and personnel of the Nebraska .

-Public Power' District. Analyses _were performed and repoyts of analyses were

, . prepared by - Teledyne Isoto pe's and forwarded to Neh3ska Public Power District. ,Vf -

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N W TELEDYNE- ,.,

ISOTOPES ,

., I. INTRODUCTION 7

This report contains a complete tabulation of data collected during the' period ' January through December 1986, for the operational Radiological Environmental Monitoring Program performed ' for the - Cooper Nuclear Station (CNS) of the Nebraska Public Power District (NPPD) by Teledyne Isotopes.

Cooper N,uctear - Station -is located in Nemaha County in th'e southeast-corner of Nebreska on the Missouri River. A portion of the site extends

-) into Missouri.h The reactor is a 778 megawatt boiling water reactor. Initial

'\ criticality was attained 'on February 21, 1974. The reactor reached 50%

power on June 25, 1974 and 100% power on November 20, 1974. .

Raliological environmental monitoring began in 1971 before the plant becamei operational and has continued to the present. The program monitors

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radiation' levels in air, terrestrial and aquatic environments. Most samples are 'callected by NPPD personnel. All are shipped for analysis to a con-(tractor's~ laboratory where'there exists special facilities required for measurements ' of extremely low levels of radioactivity. From 1971 through

.1976 the contractor was Teledyne Isotopes, Westwood, New Jersey, NALC0 Environmental Sciences assumed responsibility for the analyses effective ge - January 1, 1977.

On . November 1,1978 Hazelton Environmental Sciences Corporation (HESC) -

assumed responsibility for the program. Prior to November 1,1978 Hazelton

- Environmental Sciences operated as NALC0 Environmental ' Sciences. Teledyne Isotopes again assumed responsibility for the analyses effective January 1, 1979 through December 31, 1986.

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M TELEDYNE ISOTOPES NEBRASKA PUBLIC POWER DISTRICT l COOPER NUCLEAR STATION ENVIRONMENTAL RADIATION SURVEILLANCE PROGRAM l SAMPLING SCHEDULE AND ANALYSES ONCE PER 7 OAYS Sample Type Station Nos. Analyses Airborne - Particulates 1 - 10 Gross a, S Gamma spec. on

- quarterly composite of each station and on samples with S levels > 300 dpm Airborne - Iodine 1 - 10 I-131 ONCE PER 15 DAYS Sample Type Station Nos. Analyses Milk - Nearest Producer 61 1-131 (low level)

(peak pasture only) Gamma spec, on each sample. Sr-89, Sr-90. Elem. Ca on monthly composite ONCE PER 31 DAYS Sample Type Station Nos. Analyses River Water 12, 28 Gross a - sus and dis Gross S - sus and dis Sr-89, Sr-90 Gamma spec. on each sample.

Tritium on quarterly composite Milk - Nearest Producer 61 I-131 (low level)

(except peak pasture) Sr-89, Sr-90 season) Elem. Ca Gamma spec.

Food products - Broad- 35, 92, 93 I-131 leaf Vegetation (when Gamma spec.

available) 4

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ONCE PER-92 DAYS Sample Type Station Nos. ' Analyses Background Radiation 1 - 10, 20, 44, 56, TLD readout 58, 59, 66, 67, 71, 79 - 91, 94 Ground Water 11, 47 Gross a, S Gamma spec.

Tritium Milk - Commercial and 42, 95 I-131 (low level)

Other Milk Producers ~

Sr-89, Sr-90 Elem. Ca Gamma spec.

2 TIMES / YEAR Sample Type Station Nos. Analyses Fish (Summer and Fall) 28, 35 Gross S Sr-89, Sr-90 Gamma spec.

Shoreline Sediment 28 Gamma spec.

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.__ ,--,._ __ . , _ _ _ _ _ . _ _ _ _ _ _ . .--_.-,---r __

NEBRASKA PUBLIC POWER DISTRICT COOPER NUCLEAR STATION BROWNVILLE, NEBRASKA DISTANCE AND DIRECTION FROM THE ELEVATED RELEASE POINT (ERP) TO THE SAMPLE STATION LOCATIONS STATION DISTANCEa DIRECTIONa NUMBER (MILES) (DEGREES) CLASSIFICATI0Nb-1 0.10 225 IND 2 0.75 225 IND 3 2.5 338 ~IND

'4 3.0 43 IND 5 3.5 102 IND 6 3.0 165 IND 7 2.5 230 IND 8 2.5 260 IND 9 7.3 335 IND 10 10.0 160 IND.

11 0.15 225 IND 12 0.10 360 CON 13 0.25 120 NA 14 0.50 140 P0 15 0.30 180 NA 16 0.75 202 NA 17 1.5 235 P0 -

18 0.80 270 NA 19 1.0 300 PO 20 0.96 315 IND 21 0.60 46 P0 22 0.70 95 NA 23 1.9 80 P0 24 3.0 97 P0 25 3.8 105 P0 26 3.0 130 P0 27 3.0 143 NA 28 1.8 150 IND 29 3.0 170 NA 30 5.0 178 P0 31 2.8 222 NA 32 3.4 268 P0 33 2.8 302 P0 34 2.5 333 NA 35 2.0 350 IND and CON 36 3.6 335 P0 37 3.9 330 NA 38 4.0 360 NA 39 2.8 25 P0 40 3.9 37 P0 41 8.4 11 NA 42 12.9 156 IND 43 11.8 217 NA 44 10.3 270 CON 45 4.0 325 NA 46 24.8 153 NA 47 25.8 154 IND 48 5.6 332 NA 49 11.4 222 NA 1.1 270 NA 50 6

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a STATION DISTANCE" DIRECTION NUMBER (MILES) (DEGREES) CLASSIFICATI0Nb

'51 4.2 125 NA 52 7.4 79 NA 53 2.0 216 .NA 54 5.2 320 NA 55 1.8 270 NA 56 1.9 118 IND 57 6.6 208 NA 58 1.1 219 IND 59 1.0 189 IND 60 8.4 42 NA 61 3.5 326 IND 62 1.5 225 NA 63 5.0 56 NA 64 2.3 99 NA 65 1.1 305 NA 66 4.5 200 IND 67 4.8 325 IND 68 3.4 270 NA 69 3.5 31 NA 70 3.5 36 NA 71 4.3 71 IND 72 3.8 39 NA 73 10.0 35 NA 74 2.4 270 NA 75 9.0 180 NA 76 5.3 212 NA 77 2.2 223 NA 78 8.2 74 NA 79 0.85 299 IND 80 0.75 284 IND ,

81 0.80 265 IND l 82 0.80 176 IND 83 4.4 189 IND 84 4.4 297 IND 85 3.1 3 IND 86 4.6 16 IND 87 1.75 20 IND 88 1.75 63 IND 89 2.0 86 IND 90 , 2.25 134 IND 91 6.9 54 IND 92 10.5 90 CON 93 1.25 189 IND 94 3.6 108 IND 95 7.3 216 IND a

Distance and direction are specified with respect to reactor elevated release point.

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. Classification codes: IND = indicator; CON = control; P0 =

pre-operational sampling site rot used in 1986 sampling program; NA =

not active as of 1 January 1986.

7

TTELEDYNE ISOTOPES PART I Annual Summary for Each Type of Sample with the Yearly Average of All Stations, the Number of Detections per Total Analyses, the Station with the Highest Average Activity, the Activity of the Control Station and the Inclusive Dates of the Analyses.

8

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

N'f BR A 5k A PUBLIC POWER DISTRICT COMPILATION - ANNUAL

SUMMARY

COOPER NUCLEAR STATION PATHWAY- AIRBORNE CONTROL -

SAMPLE - AIR PARTICULATE FILTERS UNITS - PCl/CU. M CONTROL LOCATION NON- REPORTING PERIGO LOCAT13H WITH HIGHEST MEAN MEAN X E-00 ROUTINE OMALYSIS NO LIMIT OF ALL INDICATOR SAMPLES MEAN I E-00 DETECTION MEAN I E-00 RANGE RANGE MEAN X E.00 RANGE STATION FRACTIDN FRACTION FRACTION STATION DESCRIPTION ----- .-.......-.---- ---- -----------------

0.00327 0 12/31/85-12/29/86 518 0.00200 0.00290 0.3110 GR-A 0.00327 01 041/052 .0.00160-0.00267-180/515 ST AT ION 01 - 0.1 MI. 225 DEG. IMO.

0.0457 0 12/31/85-12/29/86 518 0.00100 0.0397 0.450 GR-8 0.0457 08 052/052 0.0150 -

0.0370 -

516/588 STATION 01 - 0.1 MI. 225 0FC. 1%D.

0 10/13/86-10/20/86 2 LT 0.00000 LOST LT 0.00000-LT 0.00000 000/002 e

The air particulate filters from Stations 9 and 10 for the week of 10/13-10/20 were lost in transit. Package was damaged

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RA310L7C]fAL E NV I R ONME NT AL MONITORING PR7 GRAM

SUMMARY

f]4PILATI14 --ANNUAL SU4 MARY NE4RASKA PUBLIC P3WER DISTRICT PATHWAY- AIRBD4NE SAMPLE - CHARCOAL FILTFRS CJNTROL - C03PE4 HUCLIAR STATION UNIT 5 - PCl/CU. M LOCATI1N WITH HICHFST Pf are CONTROL L OC AT 10*4 NON- SEPORTING PER100 ANALYSIS NO LIMIT OF ALL INDICATOR 5 AMPLE S MFAN I E-00 400 TIN 8 DETECT 13N MEAN 1 E-00 MEAN a E-00 MEAN z E-00 RANGE STATIN's F4ACTl0N RANGE MANGE F%ACTidH STATION 385CPIPTION FRACTION 0.le68 0.4611 0 12/51/05-12/29/06 1-111 520 '

0.7791 - e.4nt) 08 001/0%! 0.1460 - 'O.8840 037/520 S T A T i n*4 05 - 2.5 -I. 260 DEG. 5 %).

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RA010 LOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

PATHWAY'- INGESTION COMPILATION . ANNUAL

SUMMARY

SAMPLE - MILK.NE AREST PRODUCERS NE8RASKA PUBLIC POWER DISTRICT.

CONTROL . COOPER NUCLEAR STATION UNITS . PCl/L ITER i

ANALYSIS NO LIMIT Of ALL INDICATOR SAMPLES LOCATION WITH HIGHEST MEAN CONTROL LOCATION NON- REPORTING PER100 DETECTION MEAN X E-00 MEAN X E-00 MEAN X E.00 ROUTINE

MEAN X E.00 RANGE STATION FRACTION RANGE RANGE j FRACil0N STATION DESCRIPTION FRACTION CA MG/1 17 2.2

! 1.8 3.3 0 01/06/86 12/01/86 0t1/011 1 1-131 22 0.180 12.0 BY CHEMICAL SEPARATION 1.3 42.0 0 01/06/86-12/01/86 006/022 4

$R.89 17 2.0 LT 2.0

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SR.90 17 1.4 1.9 1.1 -

2.7 0 01/06/86-12/01/86

[3 017/017 l K.40 19 140.0 1207. 0 01/06/86 12/01/86

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1350 019/019 1

1-131 19 80.0 12.4 8Y GAMMA SPECTROSCOPY 12.4 0 01/06/86-12/01/86 12.4 001/019 i

l Cs.134 19 9.00 9.0 8.9 . 9.0 0 01/06/86 12/01/86 002/019 Cs.137 19 9.00 13.7 0 01/06/86 12/01/86 j 10.7 17.2 011/019 i

RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM StsetARY i

PATHWAY . INGESTION COMPILATION - AspeUAL Supe 4ARY NE8RASKA PUBLIC POWER DISTRICT SAMPLE - MILK-0THER PRODUCERS CONTROL . COOPER NUCLEAR STATION UNITS . PCl/ LITER ANALYS15 No LIMIT OF ALL INDICATOR SAMPLES LOCATION WITH HIGHEST MEAN CONTROL LOCATION NON. REPORTING PERIOD ..

DETECTION MEAN X E.00 MEAN X E-00 MEAN X E.00 ROUTINE MEAN X E.00 RANGE STAT 10N FRACT10N RANGE RANGE FRACI10N STAT 10N DESCRIPTION FRACTION CA MG/l 8 2.3 2.3 0 01/13/86 10/20/86 .

, 2. 3 2.3 42 004/004 1.9 3.0

3.0 008/008 STATION 42 12.85 MI.156 DEG. IND.

1 2.3 95 004/004 1.9 - 3.2 STATION 95 - 7.3 MI. 216 DEG. IMO.

i 1-131 8 0.780 LT 0.400 BY CHEMICAL SEPARATION O 01/13/86 10/20/86 LT 0.200 .LT 0.400 000/008 Z SR-89 8 2.0 LT 2.0 0 01/13/86 10/20/86 LT 1.0 .L T 2.0 000/018 4

SR.90 8 1.4 1.8 1.9 0 01/13/86 10/20/86 1.7 .

1.9 42 004/004 1.4 - 2.2 008/088 STATION 42 12.85 MI.156 DEG. INO K.40 8 140.0 1263. 1313. 0 01/13/86 10/20/86 1213. .

1313. 42 004/004 1270. -1400.

008/008 STATION 42 12.85 MI 156 DEG. IMO.

1-131 8 30.0 LT 10.0 8Y Gape 4A SPECTROSCOPY 0 01/13/86-10/20/86 i LT 8.0 -L T 10.0 000/008 5

, Cs.137 8 9.00 LT 11.2 11.2 0 01/13/86 10/20/86 LT 11.2 -LT 11.2 42 001/004 11.2 - 11.2 1

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RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

PATHWAf . GAMMA EXPOSURE COMPILAIION . ANNUAL

SUMMARY

NE8RASKA PUBLIC POWER DISTRICT SAMPLE - ENVIRONMENIAL TLD CONTROL _. COOPER NUCLEAR STATION UNITS . mR ANALYSIS NO LIMIT OF ALL INDICATOR SAMPLES LOCATION WlIH HIGHEST MEAN CONTROL LOCATION NON. REPORTING PER100 DETECTION MEAN X [.00 MEAN X E.00 MEAN X E.00 ROUTINE MEAN X E.00 RANGE STATION FRACTION RANGE RANGE fRACil0N stall 0N DESCRIPTION FRACTION 'l j

l ILD 125 2mW 0 01/03/86 01/02/87-(a)(b)(c)

Total 13.9 mR 110.8 mR 83.6 Esposure/ year 65.0- 110.8 01 004/004 44 004/004 125/128 ST ATION 01 - 0.1 Mt 225 DEG. IND STATION 44 10.25 MI. 270 DEG. CON. i 1

l 27.7 mR 20.9 Average 18.5 mW 22.4 33.2 18.8 24.0 Esposure/ 16.3 27.1 01 004/004 44 004/004 quarter 031/032 stall 0N 01 0.1 MI 225 DEG. IND STATION 44 - 10.25 MI. 270 DEG. CON.

5 (a) Ihe ILD FROM 5t at ion 58 was missing f rom its location for the third quarter (07/02-10/01).

(b) The ILD from Station 20 was missing from its location for:the fourth quarter (10/01/86 01/02/87).

(c) the IL D f rom St at i:n 80 was miss ing from its location for the fourth quarter (10/01/86 01/02/87).

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4 4 8 C 4' O .s O =e uFe e s se e e e e e se

== d P e me e es= e en em C de O 4 OO O OO ( O 6 o dO O *= C O == 0 0 0 ZI == t e% e% as %

== e= 0 4% 4% aO%

u9 es* me * ,e O O es e# O **

.J 4 6 *O eC eC eC eo eO

=J eI (* O 4O OO OO == O as O e= es w 4 se 1 O w 2O 9 me E wC 0 0

== U == w f Ow C e= C O O O O O O 0

==

w a= u se t ** C -

an O. O.

w9 em te. 9 == pn se . .

e- 2 0 *

O O == ==

ww .Few4 > e e e o O

e O

l

z3 .e C - a c c O I y == r i

! eaE 8 f* nea L3 I m m ew% t * *

m

.e- Q

. e ee Z U t M on t t 6

8 4 I O i

> me 4 P* 4 as 4w H t

> l == m N me T .J to as A#

T e. se =d 0 ** O 88* ==

e= F me 4 0 8 d se 9 6 #

4 42 2 9 w I $ W9 4 2

&WD *E I b as e* u a e=

21

r-1P M SCHOPES PART II

~ Oiscussion of Results, Impact on the Environment and Statistical Summary Arranged Quarterly for All Types of Samples Collected. .

22

WTERNNE ISOTOPES A and B. AIR PARTICULATE SAMPLES - GROSS BETA AND GROSS ALPHA (See Tables A A-4, 8 8-4)

STATIONS 01 to 10 Air particulates were collected on membrane filters at ten locations (01-10). The filters were changed weekly and analyzed for gross beta and

. gross alpha activities. Quarterly composites are analyzed for gamma emit-ting isotopes.

The average gross beta activity of all stations for each quarter of 1985 and 1986 is summarized below:

1985 First Quarter 0.028 pCi/Cu. M.

Second Quarter 0.019 pCi/Cu. M.

Third Quarter 0.023 pCi/Cu. M.

Fourth Quarter 0.036 pCi/Cu. M.

Average 1985 0.027 pCi/Cu. M.

1986 First Quarter 0.025 pCi/Cu. M.

Second Quarter 0.079 pCi/Cu. M.

Third Quarter 0.022 pCi/Cu. M.

Fourth Quarter 0.031 pCi/Cu. M.

Average 1986 0.039 pCi/Cu. M.

During the first quarter of 1986 the gross beta activity in air particulates was at a-low level of 0.025 pCi per cubic meter, similar to preoperatio.nal levels (See Tables A-1 through A-4). During the second quarter the ' gross beta activity rose to a level of 0.079 pCi per cubic meter as a result of the fire and explosion at the Chernobyl Reactor in the Ukraine of the Soviet Union. The fission products spread throughout the world reaching the Western United States in the early part of May 1986.

The gross beta activity increased in the week of May 5 to May 12 in the area of the Cooper Nuclear Station in Nebraska. It reached a peak of 0.350 per cubic meter during the week of May 12 to May 19 and returned to a level of 0.018 pC) per cubic meter in the week of June 9 to June 16. Readings at a similar level were measured across the entire United States in this same period of time.

The peak of 0.350 pCi per cubic meter was as high as peaks occurring in October 1976, May 1977, March 1978 and April 1981 as a result of the atmospheric weapons testing by the People's Republic of China. Results returned to normal in the third quarter of 1986. The fourth quarter showed the seasonal increase which has occurred in past years.

The gross alpha activity continued low and close to the limits of detection. Gross alpha activity is probably due to the alpha emitters found 23

TTELEENNE ISOTOPES A and B. AIR PARTICULATE SAMPLES - GROSS BETA AND GROSS ALPHA (See Tables A A-4, B B-4)

STATIONS 01 to 10 in soil and particulates di awn into the filters.

No effect attributable to the Cooper Nuclear Station was observed in the results of monitoring air particulates. ,

The air particulate filters listed below were not radioassayed for the reasons shown in the table.

COLLECTION STATION FILTER PERIOD REASON NOT ASSAYED 09 AP 10/13-10/20 Lost in Transit (a) 10 AP 10/13-10/20 Lost in Transit (a)

(a) Samples shipped in paper tube -- split open -- sent by air freight.

F 24

WTEN ISOf0 PES TABLE A-1 WEEEL Y COLLECTIONS FIRST QUARTER 1986 NE8RASKA PUBLIC POWER OISTRICT (JANUARY-MARCH)

COOPER NUCLEAR STATION a

EXPOSURE PATHWAY - AIRBORNE

, AIR PARTICULATE FILTERS l

pCi/Cu. M.

SAMPLE SIAllON MONIHLY

SUMMARY

MONTHLY

SUMMARY

MONTHLY SUMMARV NUELIDE QUARTERLY

SUMMARY

NiiMy.f ,W_

_ _ _ _ _ 12/11/85-02/03/86 02/03/86-03/03/86 03/03/86-03/31/86 12/31/85-03/31/86 AIR PARIICtiLAlt sel 3.1 1. 2 E -02 3.5 t 1.2 E-02 2.4 1 0.9 E'-02 F IL it R S 3.2

1.2 E-02 l GN055 BE TA or 1.8

1. 3 E -02 2.1

0.5 E-02 2.2 2 0.6 E-02 2. 0

0. 9 E -02 03 (a) 2.4 2 0.7 E-02 2.7 2 1.2 E-02 1.9 t 0.6 E -02 2. 3 2 0.9 E -02

! 04 2.7 2 0.7 E-02 3.2 2 1.1 E-02 2.1 2 0.6 E -02 2. 7 2 0. 9 E-02 l 05 2.4 3 0.7 E-02 2.9 1.! E-02 1.9

0.5 E-02 2. 4 2 0.8 E -02

{g 06 3.3 1 0.7 E -02 3.8

1. 3 E -02 2.4 2 0.6 E -02 3.2 1 1.0 E-02 i

07 2.9 0.7 E-02 3.2 1.2 E -02 2.0 2 0.6 E-02 2. 7 t ' O. 9 E-02 08 2.4 a 0.6 E -02 2.8 2 1.0 E-02 1.8 0.5 E-02 2.32 0.8 E-02 09 2.5 2 0.5 E -02 2.8 1.1 E-04 1.6

0.3 E-02 2. 3 2 0.8 E -02 10 2.1 t 0.7 E-02 2.8

1.2 E-02 1.7 2 0.5 E-02 2. 3 1 0. 9 E -02 AVERAGE 01-10 2.6 2 0.9 E-02 3.0 t 1.1 E-02 2.0 t 0.6 E-02 2.5 t 1.0 E-02 j ALL STATIONS

's and s Grand a and s i

(a) for the week of 01/06-01/13 St ation 02 had low act ivity because of low vacuum on the pump.

l e

1

+

i l

2 I -

}

TABLE A-2 WEEKLY COLLECil0NS.

SECOMO QUARTER 1986 NE8RA5KA PUBLIC POWER 0!$TRICT (APRIL -JuME).

COOPER NUCLEAR STATION EXPOSURE PATHWAY - AIR 8ORNE AIR PARTICULATE FILTERS pCl/Cu. M.

SAMPLE %IAI!Oh MONIHLY

SUMMARY

MONTHLY'5UMMARY MONTHLY

SUMMARY

QUARTERLY SUMMART.

NUCtlof humpt k 03/31/86-04/28/86 04/28/86-06/02/86 06/02/86-06/30/86 03/31/86-06/30/86 AIR PARIICULAlt of 2.0 2 0. 3 E-02 19.2120.2 E-02 3.3 2 1.2 E-02 . 9.0 $14.4 E-02.

FItitR5 GROSS BE TA 02 1.8 0. 3 E-02 17.8t18.4 E-02 3.2 1 1. 3 E -02 8.4 113.2 E-02 03 1.4 2 0.3 E-02 16.0216.6 E-02 2.9 1 1.2 E-02 7.5 211.9'E-02 04 1.9 3 0.6 E-02 17.0118.0 E-02 3.1 1.5 E-02 8.0 112.7 E-02 05 1.4 2 0.3 E-02 17.1118.3 E-02 3.0 t 1.4 E-02 7.9 113.0 E-02 06 1.9

0. 3 E-02 16.6117.4 E-02 3.2 2 1.4 E-02 8.0 *12.3 E-02.

07 1.7 2 0.4 E-02 15.1215.8 E-02 2.3 t 2.1 E-02 7.0 til.3 E-02 (a) 08 1.5 t 0.4 E-02 17.6118.9 E-02 3.0 t 1.0 E-02 8.2 113.4 E-02 09 1.2 1 0.1 E-02 17.3218.2 E-02 3.1 1 1.3 E-02 8.0 213.1 E-02 10 1.6 t 0.4 E-02 15.4115.8 E-02 2.6

1.1 E-02 7.2 111.4 E-02 AVERAGE 01-10 1.6 1 0.4 E-02 16.916.1 E-02 3.0 t 1.2 E-02 7.9 212.3 E-02 ALL STAI!ONS T and s Grand I and s (a) The valve for Station 07 was partially open giving low results for the week of 06/03-06/16.

1 j

~

WTFIIDGE ISOTOPES TABLE A-3 WEEKLY COLLECTIONS THIRD QUARTER 1986 NE8RASKA PUBLIC POWER DISTRICT (JULY -- SEPTEM8ER)

COOPER NUCLEAR STAil0N EIPOSURE PATHWAY - AIR 80RNE AIR PARTICULATE FILTERS DCi/Cu. M.

SAMPLE stall 04 MONTHLY $UMMARY MONTHLY

SUMMARY

MONTHLY

SUMMARY

QUARTERLY

SUMMARY

NUCLIDE NUMBER 06/30/86-07/28/86 07/28/86-09/02/86 09/0?/86-09/29/86 06/30/86-09/29/86 AIR PARI!CULATF 01 2.4 2 0.6 E -02 2.9 t 0. 7 E -02 2.5 t 0. 7 E -02 FitIERS 2.6 1 0.6 E-02 Gan$$ 8E TA 02 2.1 0. 3 E-02 2.7 0.5 E -02 2.4 2 0. 7 E -02 2.4 2 0.5 E-02 03 1.9 0.5 E-02 2.2 2 0. 5 E -02 1.9 1 0. 5 E -02 2.0 2 0.5 E-02 04 2.1 0.4 E-02 2.6

0.6 E -02 2.1 1 0.4 E-02 2.3 2 0.5 E-02 05 1.8 0.2 E-02 2.2 1 0.6 E-02 2.0 t 0.6 E-02 2.02 0.5 E-02 06 2.0 t 0.2 E-02 2. 4

0. 6 E -02 2.2 2 0.6 E -02 2.2 2 0.5 E-02.

07 2.0 t 0.6 E -02 2.3 1 0.5 E -02 2.3 1 0.5 E-02 2.2 t 0.5 E-02 08 2.3 t 0.4 E-02 2.6 2 0.6 E-02 2.4 2 0.6 E-02 2.4

0.5 E-02 09 2.0 t 0. 3 E -02 2.4 2 0. 7 E -02 2.3

0.6 E-02 2.32 0.6 E-02 10 1.9 t 0.4 E -02 2.1 t 0.4 E-02 2.1 2 0.6 E-02 2.1 2 0.4 E-02 AVE R AGE 01-10 2.0 2 0.4 E-02 2.4 2 0.6 E-02 ALL STATIONS 2.2 1 0.5 E-02 2. 2 2 0. 5 E -02 I and s Grand I'and s.

d

c WTELEDrfEE ISOTOPES TABLE A-4 WEEKLY COLLECTIONS

, FOURTH QUARTER 1986' NEBRASKA PUBLIC POWER O! STRICT (OCTOBER -- DECEMBER)

COOPER 1UCLEAR STATION EXP05U9f. PATHWAY - AIRBORNE

.w AIR PARTICULATE FILTERS ~~

pCi/Cu. M. '

C SAMPLE STATION MONTHLY

SUMMARY

NUCL IDE MONTHLY $UMMARY MONTHLY

SUMMARY

NUMBER 09/29/86-11/03/86 QUARTERLY

SUMMARY

11/03/86-12/01'/86 12/01/86-12/29/86 09/29/86-12/29/86 F AIR PARTICutATE

[f 01 3.0 1.3 E-02 3.6 2 0. 7 E -02 FILTERS 4.1 t 1.2 E-02 y 3.T t 1.1 E-02 -

GROS 5 8 ETA 02 ,

2.8 t 1.1 E-02 3.6 1 0.7 E-02 3.9

1.0 E-02 ~ 3.4 t 1.0 E-02 03 2.7 t 1.3 E-02 3.4 1 0.8 E-02 3.4 1 0.9 E -02 ' 3.1 1 1.0 E-02 04 2.6 a 1.1 E-02 3.2 2 0. 7 E-02 3.5 t 1.1 E-0? 3.1 t 1.0 E-02 05 7.4 a 0.9 E-02 p l t 0.6 E-02 3.1 2 1.0 E-02 2.8

0.8 E-02 06 2.7 1.2 E-02 to 3.3 1 0.7 E-02 3.3 2 1.1 E-02 3.1 1 1.0 E-02 G

07 2.6 t 1.1 E-02 3.2 2 0.7 E -02 ~

3.3 1 0. 9 E-02 3.0 t 0.9 E-02 e 08 s 3.1 1.1 E-02 3.2 1 0.6 E-02 j 3.1 1 0.9 E -02

/ ~

.3.1

0.8 E-02 09 ,

,, - 2.6 2 1. 3 E -02 3:4 2;0.9 E-02 3.5 t 1.0 E.92 3."[a 1.1 E-02 (45 10 2.5 t 1.3 E-02 3.6 2 0.7 E-02 3.7 2 1.3 E-02 3.3 2 1.2 E-02 (a) '

f'/--

~. ~

e

--AVERACE 01-10 2.7 t 1.1 E-02 3.3 2 0.1 E-02 3.5

1.0 E-02 Ait STATIONS 3.13 1.0 E-02

c . r 4

y i and s " #

Grand I and s (e) Inf a!r particulate filters for Stations ,9 and 10 for the week of 10/13 to 10/20 were lost in tranist; package was'Jiefged r*

^r- '~' "< / ",

7'

& , C' p

/ , . / r* .-4y x

( / ,

't

/ y y

/

~,

-c 4

'r : ~?l r

Yf ,

WTELEDGE ISOTOPES TABLE B-1

WEEKLY COLLECTIONS

- FIRST QUARTER 1986 NE8RASKA PUBLIC POWER DISTRICT r-fr (JANUARYrMARCH),

COOPER NUCLEAR STATION

, EXPOSURE PATHWAY - AIRBORNE '

. Y AIR' PARTICULATE FILTERS ab#II pct /Cu. M.

?

n

-)

~_ .

/

SAMPLE STATION MONitty

SUMMARY

MoniHLY

SUMMARY

MONTHLY

SUMMARY

QUARTERLY

SUMMARY

NUCtIDE NUMBER 12/31/85-02/03/86 02/03/86-03/03/86 03/03/86-03/31/86 12/31/85-03/31/86 AIR PARTICULATE 01 2.8

0.5 E-03 3.0 t 1.5 E-03 -3.4 1 1. 8 E -0 3 .

FIL TERS 3.0 t 1.2 E-03 j

GROSS ALPHA 02 1.6 1 0.5 E-03 1.8 t 0.1 E-03 3.1 1 1. 5 E -03 . 2.1 2 1.1 E-03 l 03 1.8 2 0.2 E-03 3.0 2 1. 6 E -03 2.5 t 1.9 E -03 2.4 1 1.4 E-03 j 04 1.8 2 0.7 E-03 2.5 2 1.5 E-03 2.9

1.6 E-03 2.4

1.2 E-03 05 1.6 t 0.7 E-03 2.2 1.6 E-03 3.1 2 1.5 E-03 2.2 t 1.3 E-03

[j 06 2.0 2 0.2 E-03 2.3 2 1.2 E-03 3.1 t 1.6 E-03 2.4 1 1.1 E-03 07 2.0 1 0.2 E-03 2.9 t 1. 5 E -03 2. 7 i 0.9 E-03 2.5 t 1.0 E-03 08 1.6 2 0. 7 E -03 2.1 1 1.2 E-03 2.9 1 0.8 E-03 2.1 2 1.0 E-03 09 1.6 2 0.4 E-03 2.1 1 1. 3 E -03 2.9 1 0.9 E-03 2.1 1 1.0 E-03 10 1.9 0.6 E-03 3.1 1.2 E-03 2.6 2 0.6 E-03 2.5 t 0. 9 E-03 l AVERAGE 01-10 1.9

0.6 E-03 2.4 t 1.3 E-03 3.0 t 1.2 E-03 Att stall 0NS 2.4 t 1.1 E-03 1

j m and 5 Grand i and s i

l I

i

^~ ~

. 'f&,h[ . ?} r

. ;_ + .

,h,yc

]

_. m

/... ..

WTELEDVDE ISOTOPES TABLE 8-2 ~~

WEEKLY COLLECTIONS SECONO QUARTER 1986 NE8RASKA PUBL IC POWER OISTRICT (APRIL - JUNE)

^ COOPER NUCLEAR STATION

.~

kkPOSURE PATHWAY - AIRBORNE AIR PARTICULATE FILIERS pct /Cu. M.

S ArtPL E STATION *-

HO NitiL 1

SUMMARY

NUCLIDE MONTHLY

SUMMARY

' MONTHLV

SUMMARY

' [ QUARTERLY

SUMMARY

NilM B E R 03/31/86-04/28/86

_- 04/28/86-06/02/86 f ' 06/02/86-06/30/86 03/31/86-06/30/86 AIR PARI!CULATE 01 "

2.8 s 1.0 E-03 FILLERS 4.31 4.0 E-03 .

.' 1.9't 0.6 E-03.- '

' 3.1 1 2.6 E-03 GROSS ALPHA 02

- . / 4 2.3 2 0.5 E-03 3.9 t 2.9 E-03 . 2.7 t 1.2 E-03 3.0 t 1.9 E-03 03, 2.2 2 1.1 E-03 3.5 2 3.3 E-03 :,._ , -j2.0t 1.1 E-03 2.61 2.2 E-03 0 4;. . 2.3 t 0.4 E-03 3.9 t 3.4.E-03 1.7 t 0.6 E-03 .

2.7 1 2.2 E-03 05 1 5 1 0.6 E-03 3.7 2 2.18 E'-03 2.0'* 1.0 E-03 .

2.5 1 2.0 E-03 ra 06

- o 2.4

I.2 E-03 2.9 1 2.2 E-03 2.8

1.6 E-03 2. 7 ' t 1.6 E-03 07 1.9 0.6 E-03 3.1 t 2.7 E-03 2.0

0.9 E -03 2.4 2 1.7 E-03

. ;. '08 1.9 t 0.8 E -03 3.5 2 3.5 E-03

, ; ,~

2.1 1 0.9 E -03 2.6

2.2 E-03 09 1.8 1 0.8 E-03 s3:3 1 2.5 E-03 2.0 2 0. 7 E -03 2.4 1-1.7 E

10 1.9 0.5 E-03 3.l 1 2.'6 E-03 1.7 2 0.2 E-03 . 2.3 i 1.6 E-03 ^

3 -

A R Am el.10 m , 0.8 E ;3 3.3

6 E.03 2., 1.8E.0;

~

ALL STA110NS

0.9 E.03 2.6 1 x 3nd s s Grand I.and s

(, _,

4 t

e

n . . . , - .+ ;

, c ,... .

, , , s j%

n. >

s /1" .. J( ,

WTELEDGE ISOTOPES

/

TABLE B-3 WEEKLY COLLECTIOe5' THIRD QUARTER 1986

,7 .Nf8AASKA PUBLIC. POWER OISTRICT ,(JULY - SEPIEMBER)

A COOPER NUCLEAR 5TATION EXPOSURE PATHWAY - AIR 809NE AIR PARTICULATE FILTERS -

i pCi/Cu. M.

SAMPLE SIAIION MONTHtY

SUMMARY

MONTHLY

SUMMARY

. MONTHLY

SUMMARY

NUCLIDE hiiMHi k QUARTERLY

SUMMARY

06/30/86-07/28/86 07/28/86-09/02/86 09/02/86-09/29/86 06/30/86-09/29/86 AIR PARilEULAll HR 2.7't 0.9 E-03 2.7 2 0.8 E-03 1.8 1 0. 6 E '- 0 3 -

I IL it RS 2.5 2 0. 7 E GH055 ALPHA 02 2.1 0.2 E-03 3.0 t - 2. 3 E -03 2.4 t 0. 4 E-03 2.5 t 1.4 E-03 01 2.0 t 0.1 E-03 2.7 1 0. 7 E -03 ' I . 7

0. 5 E -03 2.2 1 0.6 E-03 04 2,1

0. 3 E -03 2.1 2 1.0 E -03 2.4 1 0.5 E-03 2.2 2 0. 7 E -03 05 1.8 t 0.5 E-03 2.0 t 1.2 E -03 1.D t 0.5 E-03 1.9 2 0.8 E-03 06 2.6 t 1.2 E-03 2.4 t 0.7 E-03 2.2 2 0.5 E-03 2.4 2 0.7 E-03 07 2.4 1 0.5 E-03 2.4 2 1. 3 E -03 2.1 2 0.6 E-03 2.3 2 0.8 E-03 08 2.2 2 0.4 E-03 2.5 t 0.6 E-03 2.2 1 0.8 E-03 2.3 1 0.6 E-03 09 2.2 t 0.4 E-03 3.9 2 0.7 E-03 ?.2 1 0.3 E-03 2.1 2 0.5 E-03 10 2.1 1 0.1 E -03 2.0 t 0.6 E-03 1.7 i 0.5 E-03 1.9

0.4 E-03 AVERAGE 01-10 2.2 1 0.6 E -03 2.4 2 1.1 E-03 2.0 t 0.5 E-03 2.2 2 0.8 E-03 ALL stall 0NS i and s Grand I and 5

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

TTEl.EDrpME ISOTOPES TABLE B-4 WEEKLY COLLECTIONS FOURTH QUARTER 1986 NEBRASKA PUBLIC POWER OISTRICT (OCTOBER-DECEMBER)

COOPER NUCLEAR STATION EXPOSURE PATHWAY - AIRBORNE AIR PARTICULATE FILTERS pC1/Cu. M.

SAMPLE STATION MONTHLY

SUMMARY

MONTHLY

SUMMARY

MONTHLY

SUMMARY

QUARTERLY

SUMMARY

NUCLIDE NUMBER 09/29/86-11/03/86 11/03/86-12/01/86 12/01/86-12/29/86 09/29/86-12/29/86 AIR PARTICULATE 01 2.5 t 1.0 E-03 3.5 1 0.6 E-03 3.8

1.4 E-03 FILTERS 3.2 2 1.1 E-03 i GROSS ALPHA 02 2.3 2 1. 3 E -0 3 3.0 t 1.1 E-03 3.9 2 1.5 E-03 3.0 t 1.4 E-03 03 2.4 t 1. 5 E -03 2.7 2 0.8 E'-03 3.2 1 0.4 E-03 2.7

1.0 E-03 04 2.6 t 1. 2 E -03 3.3 1 0.8 E-03 3.8

1.3 E-03 3.2 2 1.2 E-03 05 2.5 t 1.1 E-03 3.1 1 0.6 E-03 2. 7 1 0. 9 E-03 2.72 0.9 E-03 gj 06 3.6 t 2.0 E-03 2.8 2 0.6 E-03 2.7 1 0.6 E-03 3.1 2 1.3 E-03 01 2.5 t 1.1 E-03 3.2 t 1.0 E-03 4.0 t 0.8 E-03 3.2 1 1.1 E-03 08 2.9 t 1. 7 E -0 3 3.2

0.8 E-03 3.4 1 1. 5 E -0 3 3.1 1 1.3 E-03 09 2.8 1 1.0 E-03 2.8 1 1.4 E-03 3.5 2 1.0 E-03 3.0 e 1.1 E-03 (a) 10 3.0 t 1.8 E-03 3.5 t 1.0 E-03 3.1 1 0.7 E-33 3.2 1 1.2 E-03 (a)

AVERAGE 01-10 2.7 1 1. 3 E-03 3.1 1 0.8 E-03 3.4 1 1.0 E-03 ALL STATIONS 3.0 t 1.1 E-03 I and 5 Grand I and 5 (a) The Air Particulate Filters for St ation 9 and 10 for the week of 10/13 to 10/20 were lost in transit; package was damaged.

T TELEDYNE ISOTOPES C. AIR RADIOI0 DINE - CHARC0AL FILTERS (See Tables C-1 through C-4)

STATIONS 01 to 10 Charcoal filters used in series with air particulate filters were col-lected weekly during 1986 at stations 01 through 10 and monitored for radio-iodine.

Tables C-1 through C-4 show the average monthly and quarterly results for each station and the average of all 10 stations. Airborne I-131 levels were below the limits of detection for all of 1986 except following the fire and explosion at the Chernobyl reactor in the Soviet Union. Airborne radio-iodine-131 was detected in charcoal filters collected May 12, May 19, May 27 and June 2.

The charcoal filters collected after June 9 showed no further evidence of airborne iodine I-131.

The highest levels were during the week of biay 12.to May 19 reaching an average peak of 0.816 pCi per cubic meter. The highest level was 0.4613 pCi per cubic meter at station 08 (2.5 miles, 260 degrees) for the four week period. Elevated readings occurred over the entire United States for the same period of time.

Since no detections of airborne I-131 occurred before May 12 and after June 2, it may be concluded that no detectable radioiodine was contained in air emissions from CNS.

)

33

r

~

TTELEDVIE ISOTOPES TABLE C-1 WEEKLV COLLECTIDE; FIRST QUARTER 1986-NE8RASKA PUBLIC POWER DISTRICT (JANUARY-MARCH)

COOPER NUCLEAR STATION EXPOSURE PATHWAY - AIRBORNE CHARCOAL FILTERS pCi/Cu. M.

SAMPtE 5 l A l lia. Mist. ! H1 V %HMMARY MONIHLY

SUMMARY

MONTHLY

SUMMARY

QUARTERLY

SUMMARY

DET./

NUCL IDI ., t. ipr t e 1 i'lo. 0//01/86 0?/03/86-03/03/86 03/03/86-03/31/86 12/31/85-03/31/86 TOTAL RANGE CHARCOAt i,1 6 .I. 4. t-0? t.I. 5. E-02 L.I. 5. E-02 L.T. 5. E-02 0/13 (L . I . 2. -L . T . 5. ) E -02 FILItH5 l - 131 0? L.I. 4. E-02 t.I. 5. E-02 L.T. 4. E-02 L.I. 5. E-02 0/13 (L . T . 2. -L . T . 5. )E -02 03 L.I. 4. E-02 L.I. 5. E L.I. 4. E-02 L.T. 5. E-02 0/13 (L.T.2.-L.T.5.)E-02 04 L.I. 4. E-02 L.I. 5. E-02 L.T. 4. E-02 L.T. 5. E-02 0/13 (L . T . 3. -L . T. 5. )E-02 05 L.I. 2. E-02 L.T. 3. E-02 L.T. 3. E-02 L.1. 3. E-02 0/13 (L.T.I.-L.T.3.)E ca 06 L.I. 4. E-02 L.T. 3. E-02 L.I. 4. E-02 L.T. 4. E-02 0/13 (L.I.2.-L.T.4.)E-02 -

4s 1 07 L.T. 4. E-02 L.I. 3. E-02 L.T. 3. E-02 L.T. 4. E-02 0/13 (L.T.2.-L.T.4.)E-02 _l 08 L.T. 4. E-02 L.I. 3. E-02 L.T. 3. E-02 L.T. 4. E-02 0/13 (L . T . 2. -L . T . 4. ) E -02 09 L.T. 4. E-02 L.T. 3. E-02 L.T. 3. E-02 L.T. 4. E-02 0/13 (L . T .2. -L . T .4. ) E -02 10 L.T. 3. E-02 L.I. 3. E-02 L.I. 3. E-02 L.T. 3. E-02 0/13 (L.T.I.-L.T.3.)E-02 01-10 L.T. 4. E-02 L.T. 5. E-02 L.T. 5. E-02 L.T. 5. E-02 -- I OET./ TOTAL 0/50 0/40 0/40 0/130 0/130 --

RANGE (L.T.2.-L.T.4.)f-02 (L . T . 3. -L .T . 5. )E -02 (L . T . 3.-L . T . S. )E -02 (L . T . 3. -L .T .5. )E -02 -- --

r WTELEDYNE ISOTOPES TABLE C-2 WEEKLY COLLECTIONS SECONO QUARTER 1986 NE8RASKA PUBLIC POWER OISTRICI (APRIL-JUNE)

COOPER NUCLEAR STAil0N EXPOSURE-PATHWAY - AIRBORNE -

CHARC0AL FILTERS pCi/Cu. M.

SAMPLE stall 0N HONIHL Y SUMPARY MONTHLY

SUMMARY

MONTHLV

SUMMARY

QUARfERLY SU,MMARY DET./.

NUCLIDE NUMBER 03/31/86 08/28/86 04/28/86-06/02/86 06/02/86-06/30/86 03/31/86-06/30/86 TOTAL RANGE CHARE 0AL 01 L.I. 4. E-02 36.5 42.1 E-02 6. E-02 16.3129.9 E-02 f!LTERS

-L.I. 4/13 (L.T.4.-96.9) E-02 1-131 02 L.T. 4. E-02 29.3134.5 E-02 5. E-02 13.9223.6 E -02 L.T. 4/13 '(L.T 4.-87.5) E-02 03 L.I. 4. E-02 21. 4 t 2 7. 5 E -02 t.1. 5. E-02 10.7t18.2 E-02 3/13 (L.T.3.-68.7) E-02 04 t.i. 4. E-02 30.8232.6 E-02 L.I. 5. E-02 14.5123.2 E-02 4/13 (L-T.4.-72.5)

. E-02' 05 L.T. 2. I-02 29.1132.6 E-02 5. E-02 13.0t23.0 E-02 L.T. 4/13 (L.T.2.-74.3) E-02 06 L.T. 4. E-02 23.1131.0 E-02 5. E-n2 L.T. !!.2120.4 E-02 4/13 (L.T.3.-78.3) E-02 u$ 07 L.i. 4. E-02 2 7.2t 33.8 E -02 L.T. 6. E-02 12. 9122. 8 E -02 3/13 ( L . T .- 3. - 8 4. 6 ) E-02 08 L.T. 4. L-02 29.3233.1 E-02 5. E-02

.L.I. 13.6t23.1 E-02 3/13 (L.T.3.-81.4) E-02 09 L.I. 4. E-02 2 7.5 30.8 E -02 7. E-02 4/13 L.I. 13.1 21.4 E-02 (L.T.3.-76.1) .E-02 10 t.T. 3. E-02 25.0226.0 E-02 L.T. 7. E-02 11.8118.6.E-02: 4/13 (L.T.2.-65.3) E 01-10 L.T. 4. E-02 2 7.9229.8 E -02 L.T. 7. E-02 13.1121.8 E-02 -- --

DET./iOTAL 0/40 37/50 0/40 37/130 37/130 --

RANGE (L.T.2.-L.I.4.)E-02 (21.4-36.5) E-02 -(L.T.5.-L.T.7.)E-02 (10.7-15.3) E-02 --

t 4

4 WTT.'.EEWINE ISOTOPES TABLE.C-3 WEEKLY COLLECTIONS THIRD QUARTER 1986 NEBRASKA PUBLIC POWER DISTRICT (JULY-SEPTEMBER)

COOPER NUCLEAR STATION EXPOSURE PATHWAY - AIRBORNE CHARC0AL FILTERS pCl/Cu. M.

SAMPLE SIAll0N MUNIHLY

SUMMARY

MONTHLY

SUMMARY

MONTHLY

SUMMARY

NUCLIDE NUMBER 06/30/86-07/28/86 QUARTERLY

SUMMARY

DET./

07/28/86-09/02/86 09/02/86-09/29/86 06/30/86-09/29/86 TOTAL RANGE CHARC0AL 01 L.T. 5. E-02 4. E-02 F IL TERS

. L.I. L.T. 5. E-02 L.T. 5. *E-02 0/13 ' . (L . T . 3. -L . T . 5. )E 1-131 02 L.I. 5. E-02 1.T. E-02 4 L.T. 5. E-02 L.T. 5. E-02 0/13 ( L . T . 3. -L . T . 5.' )[-0 2 03 L.T. 5. E-02 L.T. 4. E-02 5. E-02 L.T. L.T. 5. E-02 0/13 (L . T . 3. -L . T . 5. )E -02 04 L.T. 5. E-02 4. E-02 L.T. L.I. 5. E-02' L.T. 5. E-02 0/13 (L . T . 3. -L . T . 5. )E-02 05 L.T. 3. E-02 L.I. 3. E-02 3. E-02 L.T. L.T. 3. E-02 0/13 (L . T .2. -L . I,3. )E -02 u, 06 L.T. 5. E-02 L.T. 4. E-02 4.

m L.T. E-02 L.T. 5. E-02 0/13 (L'.1. 3. -L . T . 5. )E -02 07 L.T. 4. E-02 L.T. 4. E-02 L.T. 4 E-02 L.T. 4. E-02 0/13 (L . T . 3. -L . T . 4. )E -02 08 L.T. 4. E-02 L.T. 4. E-02 L.T. 4. E-02 L.T. 4. E-02 0/13 (L . T . 3. -L . T . 4. )E -02 09 L.T. 4. E-02 L.T. 4. E-02 4.

L.T. E-02 L.T. -4. E-02 0/13 (L . T . 3. -L . T . 4. ) E -02 10 L.I. 4. E-02 L.I. 3. E-02 L.T. 4. E-02 4. E-02 L.T. 0/13 '(L.T.3.-L.T.4.)E-02 01-10 L.I. 5. E-02 L.T. 4. E-02 5. E-02 5.

L.T. L.T. E-02 -- --

DET./ TOTAL 0/40 0/50' 0/40 0/130 0/130 .--

i RANGE (L.I.3.-L.T.5.)[-02 (L.I.3.-L.T.4.)E-02.(L.T.4.-L.T.5.)E-02 (L.T.4.-L.T.S.)E-02 -- --

l

, - ' s '

u 1

6

'S8) 2 2 2 2 2 2 2 2 N9R 0 0 0 0 2 2 O1E - - - 0 0 0 0 - -

I S E E E E E TRN )

E E E [ E

) ) ) ) ) ) )

CEE . . . . . .

) )

ETC 6 6 6 6 3 5 5 LRE 5 5 LAD T S.

OU - T

. T. T. T. T. T. T. T. T. -

CQR L L L L E - - - -

L L

L L L L - - -

YHS - - - -

LTO 3 3 3 3 2 2 KRT E

- 2 2 2 2 EUC G EOO N T. T. T. T. T. T. T. T.

T T.

WF( A L L L L L L L L L L R ( ( ( ( ( ( ( ( ( (

L

/. A TT 3 3 3 3 3 3 3 3 3 3 0

3 1 1 1 1 1 1 1 1 1 1 EO / 0/ 0/0 / / / 0 / 0/ 0/0 / 1 DT 0 0

/ -

0 0 -

2 Y6 0 R8 -

A/ E M9 2 2 2 2 2 2 2 2 2 2

)

M2 0 0 0 2 .

U/

0 0- 0 0 0 0 0 0

- - - - - - - 6 S2 E - - -

E E E E E E E E E 1 E Y - T.

L6 . . . . . . . . . .

L R8 6 6 6 6 3 5 5 5

. 0 -

E/ 5 5 6 3 .

T9 1 3 R2 . . . . . . . . . .

/

A/ T T . 0 U9 . . T. T. T. T. T. T. T. T. T.

Q0 L L L T. L L L L L L L L L (

2 6 0 8 -

Y/ E R9 2 2 2 2 2 2 2 2 2

)

A2 0 0 2 2 .

0 0 0 0 0 0 0 0 0 T

M/ - - - - - - - - - -

6 M2 E E E E E C E E E E E E U1 I E S - T.

R N 6 . . . . L T N R Y8 6 6

. . . . . . 0 -

S O 0 6 6 3 5 5 5 5 5 L/ 6 4 .

I I 8 H1 / 3 D T R T0 . . . . . . 0 A I S N/ T R T A R O2 T. T. T. T. T. T. T. T. T. T.

E S E .

M1 L L L T. L 4 W - T M L L L L L L L L (

- O R L C P A Y I . 2 E C E A F u 0 L W C 6 -

L I C H L / 8 E B L U T A i Y/ )

A B N A 0 C R1 2 2 .

T U P 2 2 2 2 2 2 2 2 C p A0 0 0 0 0 2 4 P R R N/ 0 0 0 0 0 0 0 E

E A M2 E E E E A P R H E E E E E E T.

U1 E K O U C S - 0 L S O S 4 6 . . . . -

A C O Y6 4 4

. . . . . . . / .

R P 4 4 3 4 4 4 4 3 L/ 4 0 3 8 X H3 E E N T0 . . . . .

N/ T T T

. . . . . . T.

O1 T. T. . T. T. T. T. T. L M1 L L L L L T. (

L L L L L L 2

6 0 8 -

Y/ E R3 2 2 2 2 2 2 2 2

)

2 2 2 A0 0 0 0 0 0 0 0 0 0 0 M/ - - - - - - -

0 5 M1 E E E E E E E E U1 E E E S - T.

6 . . . . . . . .

0 L

. . . 5 Y8 4 4 5 4 3 4 -

L / 4 4 4 3 5 / .

H9 0 3 T2 . . . . . . .

N/ T T O9 . T. T. . T. T. T.

T T. T.

T T.

S M0 L L L L L L L L L L L

E L (

P O N T L O IOR E A S

B TB 1 2 3 4 5 6 7 8 9 0 0 T E AM 0 0 0 0 0 0 0 1 O G E TU 0 0 1 - T N N SN 1 0

/ A R

Y D T E

E L D L E AS E ED 0R T LI CE1 F PL RT3 M

MC AL1 AU HI -

SN CF1 j

k

WTELEDnlE ISOTOPES D. COMPOSITES OF AIR PARTICULATE FILTERS - GAMMA (See Tables D-1 and 0-2)

STATIONS 01 to 10 l

Air Particulate Filters, which were collected weekly, were composited ')

for each station for a quarterly gamma spectral analysis during the four quarters of 1986.

Beryllium-7, a naturally occurring cosmogenic nuclide, was detected in :

40 of 40 samples at a level of 0.1260 pCi per cubic meter which is similar to the levels of past years. Potassium-40, also a naturally occurring nuclide, was detected in seven of 40 samples at a level near the normal level of detection.

There was one detection of Co-60, a neutron activation product, at Station 01 in the third at::rter of 1986 at a level of 0.0013 pCi/ cubic meter which is below the normal level of detection.

The fission products Ru-103, Cs-134 and Cs-137 were detected in air particulate composites radioassayed in the second quarter of 1986. These detections occurred af ter the accident at the Chernobyl Reactor in the Soviet Union on April 26, 1986. Ruthenium-103, which is a short-lived fission product, was assayed at an average level of 0.028 pCi/ cubic meter.

Cesium-134 was detected at an average level of 0.007 pCi/ cubic meter and Cs-137 at an average level of 0.015 pCi/ cubic meter. The detections occurred at all ten stations. These isotopes had disappeared by the third quarter with the exception of Cs-137, a longer-lived isotope, which persisted also in such media as milk and vegetation. These same fission products were radio-assayed in many areas worldwide in varying levels and therefore are presumed not to be the results of the operations of CNS.

38

~

- ~< . -

G3

@ ee - M 8*1 - w 8st se 8'l M N M N : Q == Q Q Q Q Q Q Q Q Q N e Q e o e e e e e e e EN Lad e W W~ W Led Led had had naJ LeJ knJ a=e a

>= e N O .LaJ === Q' = Q Q Q Q Q Q m@ ..= w .Q . .Q . e . . e .=e em .==

C G3 QN e er e-o M @ a.e MN 4 G3 N 0 == N e em N e NN 8 NNe 3% C s=e < N og N 4 O Q $ Qs Q t O 8 - Oe O@ 4e me e 4e er G Qt N N . . . . e . e N O. Q ='>= >=- >= e- >= >=- >=

2a:@ N. og . s*1 e . e e e o e er Q ** , *=* C. w J .J J .J J .J .J G3

@ .N N M M N w w N M N O N O O Q Q Q Q Q Q N e Q e e a e e- e a e z@ w e w w w 6a.a tak w had w tad O O tsJ e-o a @ *a a @Q- O O Q Q Q m wa .NN . .O. . .- . em .

Q

. . ..m eC G3 QQ * **1 N 8 CN e NN 8 8l N e @N e @N e NN t NNe DN == @ Q e se a Q e Qe Qs Q e Q e OC *e * *e Q e m @ e e . . e a e VN N . M s-= o= > >=

s@ e us >=. . >=. . . >=. e e MQ G3 w a ** J .J .J a J a M @

M G3

.w N

>= Q -e N M N M m O~ N N M

,J Q ** Q Q Q N Q Q M Q N O Q N Q Q nn. - =g@

e saa e s

saa 64 e e tad e o a Q s e

>= bad Q had e saa - 6.a e saa a w w Lad w Led heJ

==

wa >= e MQa O O @Qa O G3 Q - Oa O O w >= CC @ a m 44'l = s=e +== **= @ *8.* *==@ N. a=s @ **=e J g E aC eC G3 QN

nit N 8 NN8 CN

ta= E M 8*'t N 8 CN

QN e MN 8 MNe d 3 QN Q8 C8 C 8*t Q e Q G3 Q ** O e Q g/l O Q 3 O .%. . ee .-e a +e== s eg e e eg .e e

. . G3 y M ar . . M e Q' >= g N M , o

== VN O

8-= o= G3 t= N * @ e H >=

eC == >= CM * == * * * **

>* M

* @ * ** e

CE EC NQ N w .J .J N w J N w ** w .J J te.s E#5 aC

== 2 e 4

9 Q M E Q & eC >= m==

LaJ *C . @

nad W .J 2 et . 3 G3

= U Z .

U N N CD .J 3 >= >= N == N O N M M =d M M N

C sn E M

>=

aC d *= M Q s O N Q Q Q Q Q Q Q 3 CL M u N e ene e C e s e a

& e a e CE taJ CL MM taa a naa e nnJ Led w w sad w 'w wQ @ i.e.a tad Lad is.s aC CL CE 2 *= a @Qa-G.3 O C O Q NQ Q Q M- Q 3 CE @ **Q@. = e.e 8"? e e.e ==

e.e s==

m.e ee M Q to La. eC G3 M N == QN . *= N e

= =

MN e G3 % e == N e QN e e-o N s NN e aC W Q Q 3% O e MN Q e m A O s.= 4ese M 4e e Q 8 'O e Q e == e Q t Q e G3 M ee tad M @ N e . e e Lad &nJ >= ee N ta'l @ e >=

E t- - o== >= >= >=

e-o M

e C% e We 3 e == e . . . gr. . .

s-e *= @ w ** w a e .4 .J s.=

Q .J .J CL E

Q e * * *

e W > > > > > > >

V. ga V. *g"* V. g V. g V. *g* V a=

e g V=

=g V-e g U. =g V ** V ** V es V ** V ** V e.a Ve V .*

e.* O ** O ** V **

O so e* en se o e a+

e N t'd 4 es

e. N .

e .O.e

e N .

e me

4. N .

e .O4

e N .

in .Oe Se N .

eo

+e N .

4 se O e me wt ee ,

C

C's C e @ C e @ C *@

Se N . 4e N G7 C * @ C *@ C e Cpt C e CD C =@

i

@ C @

. M. ,G

@ .M. , . a. C, M. u. C, M. u. C . M. m..C M. a. C. A. a. C.

. a. C .

EVb ZVb ZV6 EVL EV6 EVb EV6 EVb EV6 E

O2

= i*a Q Q Q Q Q Q Q Q Q

> co == .-e -

.e et E 6 e i e e 4 e g g

>= 3 s's s** .-o me amo e-o me e-e e-e

,, AE C C Q Q Q Q Q Q Q i.e.a and C M er N a= @ G3 Q Q =* M N N CL .a N O @ M s.e .M. N ZW *r e a e e N, aC 3 .e o O 3 e e e g i

g ME G3 M W CE =* W y CE >=

39 !

l 1

' i e

m m e o=s 'o '

=s e e m *=m m m e m o . -s m

.O= Q O O- O O O O w % .O O. _ ,O, Oe O. .Oe .O. .O

= . = .= . . -e == -e .O = -e .O

% % % % % N % % % % - % % % -% % % : N *

@ .O* w Q O O O O O O O O O' O O O 'O 'O

. ag w w w .O, w w .w w w w w w w w , w w w w N

e . .

M M M M e M M m M .= m M N M M N m' N O O' O O'O O O O O O O O O O O O O O N e e e e o e e e e e e e e o e e e e at N tad ' w w w naJ nad w w naJ sea Lad w w w w w naa w-we

>= a ag @ N. O. e . . . e e . . . . . . e e . e .

at e O w- .* N N

M N' 8B e O =* .* e== N @ N N 3%

Om *e +e N e e . . e e . e . e e e o e e . e K% N >= >= e= to >= to >= >= >=e >=e >= to a,e m e O. . e a e e. >=. e >=. >=. .. e e o e eC ** CD J 'd .J - d =J .J J .J .J =J . .J .J .J J .4 :.J

.==

0 *=m e om e m os m ==m m m o ==. m m e

= .O

% . .O .O = .O e .O .e .O = .O. .O = = ..O O. .O. . O.e .O = ' .m O .O= .Oe .O =

O N N % % % N N % % % % .% % % % % N

@ == O O O -. .* O O O O O O- O O O O O O Cc w w w .O w . w w w w w w w w w w w w w N -

m N N w m M M mm M m N e w m M M. N M N O O O O O O O O O O O O O O O O O O N e e e e a e e e e e e e e e- e e e e cc e w w w naa had w w taa nad - ns.s w w taJ nnJ w tea Lad w wC

>= e @

ag @ m. . e e . e e . e e e e . e o e o e aC CO C 0"1 m ** m -O M .* N CC M e e e M @ N N DN M QC +e +e og m e e . . e e e e e . . . e e . .

V% p's t= >= 4*1 e- >= >= >= .I

.n.a.s e=. e=. e=. >=. e=. > = . - . >= >= >=

s. @ . . e o e o e >=. . .. e l

.J mO CO a J .J .J .= -J a .J J .4 '

.J .4 .J =8 .J -J =J Ln=

>= tea = =am a== e===

u >= O m *== m m m *== m O m *== Q e a e m' ===

== taa - aC -= Q Q O a=* O O .= .O-e Q O- O ag 2- d N .O .O .O .O. %

>= E e e = == = = == N N .= == .O = .O ==

ac 3 O % % % % % % . % C % %O O % % % . N N M O O u @

O O 'O O O O O == O O == == O .O O O O

== . co =e cc w w w w w w w w w w w w w w w w w w -

O >= cc >= %

aC a'a cc O . ** N M. m N M M M N N O M N .-8 N N N M or >= .aC aC m O O O O O O O O O O O O O O O O O O w M A % e . e e e e e e a e e e a e e e e e N 2 e

cc @ tad 64 ned and nn.s - nad nad Lad tea ned w na.s an.e n.a Lad w med nea

e. O aC GC E WO O Q. aC >= == * === e M @ CO -N naJ *C aC 3 CC @ * . . . * * =. . * *

e * * * * * .

Sea u .4 2 u aC c0 C **1 N- T = N @ v O N M O O N ** e-o M M a e=e . U I D= N 3%

CO .J 3 e== .J == O .= +8 *e 9e +e

C e E aC M u M e * * * * * * * . * . e o e

>= 3 A saa CL T% >= >=* >= >= >= >= >= CD >= > = - N @ >= e- >= >=

A aC e.a cm C. * * * * * = *

e e . >=. . e a e tea tsJ 2 NO N d J .J J J .J .J N .J w N =*

aC' A og J J .J .J .id W <Q 3 6 M C M C aC u O - .a=

ag A ned O m .-= m m e e .== =

eii i. .- .== m a =

s< >= == 0 C O m.a 6 n.a == % = == .C .C .C .O. .O -. .O .O. .O. O.

. ' .O.e .O - .O .O.e .Oe a M O % % % % N % % % % % %. % % % N % %

O @ == M O O O O O O O O O -O

e. cc w w w

= -O O O O w w w w w w w w w w .O w w w E N O N N m m m m m m m m e m M N m M N m u m .O O O O O O O O O O O O O O O O O N e e e e e e e e e O

e e e e e o e e cc m sea saa ned saa ina w sea w ts.s naa n.a 6a.s w taa nna 6.a naa i.na e

wQ

> e @

cc c CO. . . . . . . . . . . N. . . . . .

C 23 M C. ** N @ ** M N M CO CO ao O m m - @ .= N 3%

O == *e +4 *e m e . . e e . . e e e e e e . .

.a % e e e= e.= m >= >. >= e.- w >= >=

e . >=. >=. e e.=. . e e=, >=. >=.

.c= =m= m a .a a s a .J .J .J .J =4 e

.-e e

a -4 e

.4 J J

s 0

0 z

O oc

=w O O O

.= cm .O. .O .Oe == = .O = = .O .O .O. -. ,O

.Oe -. .O. .O. .O .O. .O. .O

C E e e e e e

>= = .= .e. .e= .eo me == .-e .-e .e.e .e.e e-o e

.mo e

.ee ==

o

.-e e e e-o e

e-o .e e

ME O O O- C O O O O O O O O O O O O O O h bea O

-.a w

a== v m O M"> @ w k O .=s e @ CQ A =a N O @

CO m

m c Q Q === M M w w w N N 4 @ @ @ .e .-s M .=e .=e og .=* .=e N N Eu e e e a e o e e e e .= e e c e e e e

C 3 @ e c 0 @ O c 5. 3 s e e c 9 e w aC c ME CD kg E u u N cc cc u u 6 N a== CD u u CE e==

40

WTELEDfNE ISOTOPES E. FISH (See Tables E-1, E-2)

STATIONS 28, 35 Fish samples were collected during the summer and fall at the above stations and analyzed for gross beta, Sr-89, Sr-90 and gamma emitting isotopes. The gross beta and Sr-90 activities were similar to the levels of previous years. Strontium-90 was detected in seven of ten samples at a level of 0.009 pCi/ gram, wet, which is below the normal level of detection. There were no detections of Sr-89. Naturally occurring K-40 was detected in ten of ten sanples at an average level of 2.46 pCi/gm, wet.

There was one detection of Cs-137 at a level of 0.011 pCi per gram wet, at Station 28,1.8 miles,150 degrees. This is below the normal detection level. There was no appreciable difference between Station 28 downstream of the plant as compared with Station 35 upstream of the plant. There was no indication of an effect on fish samples from the operations of CNS.

4 41

1 TTELEDHEE ISOTOPES TA8LE E-1 NE8RASKA PUBLIC POWER 0lSTRICT COOPER NUCLEAR STATION EXPOSURE PATHWAY - INGESil0N FISH - pCi/ge, wet SAMPLE STATION lst QUARTER 2nd QUARTER 3rd QUARTER 4th QUARTER NUCLIDE huMBER 06/16/86 10/27/86 Gross Beta 28,35 Meantstd.dev. 2.9 t 1.4 E 00 3.5 t 0.9 E 00 det./ total 5/5 5/5 range (1.2-5.1)E 00 (2.6-4.4)E 00 Sr-89 28,35 Meantstd.dev. L.T. 1. E-02 L.T. 8. E-03 det./ total 0/5 0/5 rance -. --

Sr-90 28,35 Meantstd.dev. 7.7 t 7.8 E-03 9.8

5.4 E-03 det./ total 4/5 3/5 range (1.7-19.0)E-03 (6.0-16.0)E-03

,, K-40 28,35 Meantstd.dev. 2. 3 1 0. 7 E 00 2.6 t 0.3 E 00 na det./ total 5/5 . 5/5 range (1.1-2.8)E 00 (2.2-2.8)E 00 Co-60 28,35 Meantstd.dev. L.T. 9. E-03 L.T. 7. E-03 det./ total 0/5 0/5 range -- --

l-131 28,35 Meantstd.dev. L.T. 2. E-01 .L.T. 6. E-02 det./ total 0/5 0/5 range -- --

Cs-134 28,35 Meanistd.dev. L.T. 9. E-03 L.T. 7. E-03 det./ total 0/5 0/5 range --- --

C5-137 28,35 Meantstd.dev. 1.1 t 0.5 E-02 L.T. 7. E-03 det./ total 1/5 0/5 range -- --

Th-228 28,35 Meantstd.dev. L.T. 2. E-02 L.T. 1. .E-02 .

det./ total 0/5 .

0/5 rance -- --

=3_

. TTELEWNE ISOTOPES TA8LE E-2 '

+

NE8RASKA PU8LIC POWEk OISTRICT COOPER NUCLEAR STATION EXPOSURE PATHWAY - INGESTION u FISH - pCi/ge, wet I SAMPLE STAlI0N ist QUARTER 2nd QUARTER 3rd QUARTER 4th QUARTER NHCLIOE NUMBER 06/16/86

__ 10/27/86 Be-7 28,35 L.T. 1. E-01.(0/5) 8.

l L.T. E-02 (0/5)

K-40 28,35 2.3 1 0.7 E 00 (5/5) 2.6't 0.3 E 00 (5/5)

Mn-54 28,35 L.T. 8. E-03 (0/5) L.T. 7. E-03 (0/5)

Co-58 28,35 L.T. 1. E-02 (0/5) 8.

L.T. E-03 (0/5)

Fe-59 28,35 L.T. 3. E-02 (0/5) 2.

L.T. E-02 (0/5)

Co-60 28,35 L.T. 9. E-03 (0/5) L.T. 7. E-03 (0/5)

In-65 28,35 L.T. 2. E-02 (0/5) L.T. 2. E-02 (0/5)

$$ Zr-95 28,35 L.T. 1. E-02 (0/5) L.T. 8. E-03 (0/5)

Ru-103 28,35 L.T. 2. E-02 (0/5) L.T. 1. E-02 (0/5)

Ru-106 28,35 L.T. 7 E-02 (0/5) 6.

L.T. E-02 (0/5) 1-131 28,35 2. E-01 (0/5) 6.

L.T. L.T. E-02 (0/5) l Cs-134 28,35 9. E-03 (0/5) 7.

L.T. L.T. E-03 (0/5)

Cs-137 28,35 1.1 2 0.5 E-02 (1/5) L.T. 7. E-03 (0/5) i 84-140 28,35 L.T. 6. E-02 (0/5) L.T. 2. E-02 (0/5)

Ce-141 28,35 L.T. 3. E-02 (0/5)- 2.

L.T. E-02 (0/5)

Ce-144 28,35 L.T. 7. E-02 (0/5) L.T. 5. E-02 (0/5) j RA-226 28,35 2. E-01 (0/5)

L.T. L.T. 1. E-01 (0/5)

Th-22R 28,35 L,T. 2. E-02 (0/5) 1.

L.T. E-02 (0/5)

T TELEDYNE ISOTOPES F. MILK (See Tables F-1, F-2)

STATION 61 (NEAREST PRODUCER)

Milk samples from the nearest producer Station 61, 3.5 miles, 326 degrees from the elevated release point of'CNS were collected once every 15 days in peak pasture season and once every 31 days the rest of the year. The monthly samples collected January through May and October through December were analyzed for I-131 by chemical separation for elemental calcium and strontium 89 and 90. In addition they were analyzed for gamma emitting isotopes on a high resolution gamma spectrometer. The samples collected every 15 days during peak pasture season were analyzed upon receipt for I-131 and a monthly composite prepared and analyzed as described above.

The fission product I-131 was detected in the samples collected from May 12 through July 7, 1986. The highest reading was in the sample collected June 2 which contained 42. pCi/ liter of I-131. The average activity for this period was 12. pCi/ liter. These samples were collected after the results of the Chernobyl accident of April 26 reached the United States.

Iodine-131 was detected in the charcoal filters collected during the period May 5 through May 27 and also in vegetation. Cesium-137 and Cs-134 which are also fission products, were detected in the milk samples in the second quarter. Cesium-137 continued to be detected in 9 of 13 samples until December 1986. The average level for this period was 13.7 pCi/ liter.

Cesium-134 was detected in one sample in June and one in October at an average level of 9.0 pCi/ liter. Similar detections occurred in other areas of the United States and in air particulate composites and vegetation.

There were no detections of Sr-89 in the samples analyzed. Strontium-90 was detected at an average level of 1.9 pCi/ liter, which is a normal environ-mental level. Elemental calcium was measured at an average level of 2.2 mg/ liter. Potassium-40, a naturally occurring isotope, was detected at an average level of 1225. pCi/ liter.

Since the isotopes radioassayed occurred after the accident at the Chernobyl Reactor on April 26, 1986 and occurred worldwide in many media, it may be assumed that there was no effect on the milk of the producer nearest the plant from the operations of CNS.

44

i i TABLE F-1 NEBRASKA PUBLIC POWER DISTRICT COOPER NUCLEAR STATION EXPOSURE PATHWAY - INGESTION MILK - NEAREST PRODUCER - pCl/ liter SAMPLE SIAlluh 1st QUARTER 2nd QUARTER 3rd QUARTER 4th QUARTER NUCL IDE hllMH t R 01/06/86-03/10/86 04/07/86-06/16/86 07/07/86-09/15/86 10/13/86-12/01/86 Sr-89 61 Meantstd.dev. L.T. l. E 00 L.T. 2. [ 00 L.T. ~ 2. E 00 L.T. 2. E 00 det./ total 0/4 0/4 0/5 0/4-range -- -- -- --

Sr-90 61 Meantstd.dev. 2.0 2 0.2 E 00 1.6 t'O.3 E 00 1.9 2 0.6 E 00 2.4

0.3 E 00 det./totel' 4/4 4/4 5/5 4/4 range (1.7-2.2)E 00 (1.2-1.8)E 00 (1.1-2.7)E 00 (2.1-2.7)E 00 I-131 61 Heantstd.dev. L.T. 5. E-01 17.2 2 16.9 E 00 1.5 t 0.2 E 00 L.T. 3. E-01 by che.aical det./ total 0/4 4/5 2/9 .

0/4 separation range --

(3.8-42.0)E 00 (1.3-1.6) E 00 --

a Ca 61 Meanistd.dev. 2.7 2 0.4 E 00 2.1

0.2 E 00 2.1 t 0.1 E 00 2.0 t 0.1 E 00 mg/Itter det./ total 4/4 4/4 .5/5 . 4/4 range (2.4-3.3)E 00 (1.9-2.3)E 00 (2.0-2.2)E 00 (1.8-2.1)E 00 K-40 61 Meantstd.dev. 1.231 0.1 E 03 1.31 0.1 E 03 1.21+-0.1 E 03 1.16t 0.1 E 03 '

det./ total 4/4 4/4 7/7 4/4 range (1.10-1.29)E 03 (1.21-1.35)E 00 (1.01-1,31)E 0 3 (1.07-1.23)E 03 1-131 61 Meantstd.dev. L.T. 9. E 00 12.4 t 0.7 E 00 L.T. 6. E 01 L.T. 1. E 01 by gamma det./ total 0/4 1/4 O/7 0/4 -

spectroscopy range -- -- -- --

Cs-134 61 Meantstd.dev. L.T. 5. E 00 9.0 t 4.7 E 00 L.T. 8. E 00 8.92 3.6 E 00 det./ total 0/4 1/4 0/7 1/4 range -- -- -- --

Cs-137 61 Meantstd.dev. L.T. 4. E 00 13.2 t 1.5 E 00 14.3 1 2.9 E 00 11.9 t 1.9 E 00' det./ total 0/4 2/4 6/7 3/4 range --

(12.1 - 14.2)E 00 (12.4 - 17.8)E 00 '(10.7 - 14.1)E 00

r-

== m m m m m m m .num m e m m m m m m w w my w w w er w w w w-e w .w w w w w . *

@ - O w Q O O C O O O O o ==w -mw O O wo Ow O w a3 w w w w w w w w w w w w . w

.%= .s m C C -e O == O O .e == O O *-e ==* == N m at C O Q Q O Q O Q Q Q .O O O Q O O O' O C wN

>= N w w had w sad W w 64 w led w w w tad w sad w 6ad -

E ag aC e == @ m 3@ o e e e e e . . e e e e e . . *

CT S @ O @o @ == @ m @ N @ ee m 'pe em a-o @ s-s ' e-o

% M M M A

w .me e e e e e e . e e e e e e e

ar N >= N >= ke e- >= >= e-. .- > = o >= >= >= >= >=

O e e e e e e . e=. e e >=. m. .= e e e e e m J ** J .J .J J 'd J .d d .J 00 ** J -J .w . =d a

.=. === ,== m om ,== a=> eum .=== m .=m e ,== e= a= -

e=in **= *='m N N N N N N N N N - N N N N N N N N N

% % % % % % % N N N % % % -% % % % % l e @ O N Q O O O O O O O O O @ - O O '

CD w w w w w w w ==., w w w w w w .O, .O., w .O N

m == m Q O O O == Q m =* e=e O s=* .e e-o N m l CC *== 0 Q O Q Q Q Q Q O Q Q Q O O O Q O O '

Lad N O

>= m I w w and 6.a nad sad 6s.s w w bs had w w w w sad w i 2O tad aC e ==

3@ e e e e . e o e e e e m e o e e e O G3 CO O . em CD N. N N m as Pm @ a3 e N- N @ N ==

% N D hm ee M bc e e e e e e e o e o e m o e e e e b mN >= >= >=e >=e >=e >= e >= >= >= >= >= . >= >= > >= >=

e N . . N. e e e e e e er o e e e e

- O .4 *e ,d .J .4 .4 .4 .4 -d -J .J .J ** 4 .J .J .J .d

>= %=

u 2 u

Q CL === e.m e== e=e m m m ^ == 8-==

e== m - *== ** m ==.

og == w er er

>= 2 >=

ar up w er er er w er w w er er w w 0 % % % % % % N N % % %

N % % % **== %

M C M .@ O v - O, O O O O O O wO -e N

== == w g a3 ' w w = w w w w

- O O C Q C w w w =a w w w w w w Q >= t.S w %

at E u z@ .= m Q O e O -e O e-o == O O .-e< .e e N =-a E >= == 3 w *= Q Q c Q Q Q Q Q Q w M Q >= N Q - Q Q Q Q Q Q Q C N 2 ~e Q E@ nad Lad had Led Lad w ted Lad tad o

Q had tes had Iad and Iad nad hnJ G M M #Q 4ed W

h *C >= 4 3 e e-o N mm w aC OW e o e e o e

e e - e * * @ *

e w u .J 2 e= G3 m O @ CD N no e === m O ar e CD mm ==e

=e

.-J *-e u I M VN *e em G3 J 3 e= bad C >= +e 44 +4 E

aC G3 aIC at NO e e e e * * * *

ar .= *

e o e

>a= 3' 4 aC % >= m >= >= >= >= >= >= >=

W e==

C e >= - >= >= >= >=

b ns.s er e e e e e * * * * * = e o e e e tad L

Las m

E o d e-o .4 e J .J .d d J J .Ne m . m. .d .J .J .4 .J at w o 3 e sn Q m aC u Q W ot & .s at n .= *== m o=. e m e *=m a= ~ m -= m sm e o.m m em m tad w E ar w er er er er er er er er er er er e E N % N er w w w

'N N N % % % % % N N N % % N %

@ Q ar O .O, O O O O O O O O O O O O m3 = . - w w w w w w w w w .O, .O w w w w zQ == m Q Q == Q == O O =* O O C O Q ==e N O w -= C C O O C O C O O Q Q Q Q Q Q Q Q Q

= %

MM tad ned nad ned tsJ had ned nad ned tad Lad ted

&nd ned had ted had ted 4O 3 e em O@ e e e e o e e e e e . e e e e o e a a3 er O at er ==* ar ** m e er m W W em m M e-o m ea %

e4 4 *e me C e e e o e e , e e e e o e e e a

% e- >= e=

== N. e=. e e

> >= >= >= >= >= >= >= >= >= >= >= >=

e e e e e e e e e . e e C .e ='* od J .4 -d .e ad J d .,4 .e w .4 .,,4 .4 .4 ,,,4 s

22 Ow

== a::

a-a E aC = -e e == -e .= .-e == == .=ie .= e e .= ee ,e

'=E @ @ @ @ @ 'O 'O @ @ @ @ @ @ @ @ @ @ @

m 5

ted had Q M @ T >= O m e=0 er @ CO

.d== gr c3 Q mm O O -e m M at w er N N 1 N O m m m W @ @ ** a-o m ** a.e e-o == -e N N E ts e er e e e e e a e e em e e e e e e e aC 3 e e C O & O C b 3 3 e em we 9 e W aC C mE c0 g Z U w u ev N og a == u u at y u g >=

46

T TELEDYNE ISOTOPES G. MILK (See Tables G-1, G-2)

STATIONS 42, 95 (OTHER PRODUCERS)

Milk samples were collected quarterly from other producers within a 13 mile radius of the plant. The samples were analyzed for I-131 by chemical separation, for elemental calcium, for Sr-89 and 90 and for gamma emitting isotopes. There were no detections of I-131 in the eight samples monitored.

The sample for the second quarter was collected in April before the accident at the Chernobyl reactor and the sample for the third quarter was collected in July after most of the I-131 had decayed.

There were no detections of Sr-89. Strontium-90 was found at an average level of 1.8 pCi/ liter. There were 2.3 mg of calcium per liter of milk.

Potassium-40 was detected at an average level of 1262. pCi/ liter. The strontium-90, K-40 and elemental calcium were at normal environmental levels and were similar to the results obtained from analyses of milk from the nearest producer. There was one detection of Cs-137 in the sample collected at Station 42 on July 14 at a level of 11.2 pCi/ liter. This occurred in many milk samples in all areas of the United States after the accident at the Chernobyl Reactor in the Soviet Union. It can be concluded that the oper-ations of CNS had no effect on milk samples and thus no dose impact on the population.

I 47

TTER FfWlE IS0 TOPES TABLE G-1 NE8RASKA PUBLIC POWER DISTRICT COOPER NUCLEAR STATION EXPOSURE PATHWAY - INGESTION Milk' -- Other Producers - pCl/11ter SAMPLE STATION 151 QUARTER 2nd QUARTER NUCLIDE NUMBER 3rd QUARTER 4th QUART [R.'

01/13/86 04/14/86 07/14/86 10/20/86 Sr-89 42,95 Meantstd.dev. L.T. 1. E 00 L.T. 2. E 00 L.T. 2. E 00 L.T. 1. E 00 det./ total 0/2 0/2 0/2 0/2 range -- -- -- --

Sr-90 42'95 Meantstd.dev. 1.7 2 0.4 E 00 2.1.1 0.1 E 00 2.2 t'O.0 E 00 1.3 2 0.2 E 00 det./ total 2/2 2/2 2/2 2/2 range (1.4-1.9)E 00 (2.0-2.2)E 00 (2.2-2.2)E 00 (1.1-1.4)E 00 1-131 42,95 Heantstd.dev. L.T. 2. E-01 4. E-01 by chemical L.T. L.T. 4 E-01 L.T. 2. E-01 separation det./ total 0/2 0/2 0/2 0/2

, range -- -- -- --

Ca 42,95 en ag/ liter Meantstd.dev. 3.1 1 0.1 E 00 2.2 1 0.1 E 00 1.9 2 0'.0 E 00 2.0 1 0.0 E 00 00 det./ total 2/2 2/2 2/2 2/2

{ range (3.0-3.2)E 00 (2.1-2.3)E 00 (1.9 1.9)E 00 (2.0-2.0)E 00 K-40 42,95 Meantstd.dev. 1.261 0.1 E 03 1.261 0.1 E 03 1.18t0.1 E 03 1.36t 0.1 E 0 3 '

det./ total 2/2 .

2/2 2/2 ~2/2 range (1.2 - 1.3)E 03 (1.2 - 1.3)E 03 (1.1 - 1.3)E 03 (1.3 - 1.4)E 03 1-131 42,95 Meantstd.dev. L.T. 1. E 01 L.T. 1. E 01 1. E 01 L.T. L.T. 1. E 01 det./ total 0/2 0/2 0/2 0/2 range -- -- -- --

1 Cs-137 42,95 Meantstd.dev. 5. E 00 E 00 L.T. L.T. 4. 1.1 1 0.3 E 01 L.T. 5. E 00 det./ total 0/2 0/2 1/2 0/2

! range -- -- -- --

e omm - *=m ==m m anum m e a.m . m m o e-m m e e a== m N N% ~ N N N N N N N N N N N N N % % % %% N N N N

% N % % % % % % % % %

C N O O O O O O wO O O w w w w w O, .O w w w O- O O O O w w w w w w w

= ' M C C =* O ** O O e e-. O O' O =

2 O O O a.e N a=e w@ O O O O O O O O O O O O- C O O

>= G3 had tad tad w I.

had 6ed w w nad saa .64 teJ w w taJ tad nad tad "aC O **

3N . . . . . . . . . . . .

ON m Q m nft ** 6tt . a=e @ @ att ==

O @ nft W we w a=e e=a gm *e ed . @ < . . . . . . .

w >= M >= >= >- >

t

. . . . . . >=. >= >= >= >= >= > = - >= >=

. . . . . . . . >=.

>= >=

.J m .J .J .J =J

.J =d .J a =J w =d W .J a J .J I

t e *== m m m m *= o o --. m e-m *=. m m m e m N N N N N N N N N N N N N N N % N ' N- N %

N N N N N N N

% % % % % % % % N O N O O O O O O O O O O m w w w w w w w w w O O O O w w w w w w w w .O

M C C C O O O O == == Q E O O O Q Q O = c O e N O w@ O O O O O O O O o Q o C e- G3 w 4*J nad e.ma tea tad tad w Lad naa nad taa MN nad 6sJ had nad saa - nJJ 4w e

M 3e . . . . . . . . . . . . .

ON 9 Q .T w @ w @ w e M **

N 6th O. @ @ M == .G3 9O 4.

4 L . co . . . . . . . . . . . .

M >= pe >= >= >= - > = >=

t- >= me > >=

. . . . >=. . . . . >=. . >=.

t-

. >=.

p-b .J == J .J .J e a .J =a =J -J -J w == -A J J .J a

.ed=

>= -

U E e

O ,% .-= m a ,==> a e-m .= .=. m e-m m = u N N N N N

,== m ,== .-m a e== ,== a=.

a= 2 >= glh - % %

N N N N N N N N N N N N N W % % % % % % % % % % %

O M C N O O % % % % %

== == 64 e w w =-. w .O O O O O O O O O O Q C wC O ba w w w w w w .O w w w w 4.3 w aC E m a a M O O ** O m >= - L w Q O O O as o O .e -* O O O == ** N O W e O O C O O O C O O O O N

sa.s 3 , e .= @ O O O tJ M G3 had had had and had ned las 4 O E 3 aC % ned had tad ned nad nad sea nas nad tad had C A aC >= D Dv *'*

6,nd aC g O s-. . . . .

taJ U 2

. . . . a. . . . .

a k N @ O w w -*

w e w -* *

N J == U T % 4w ==* w == @

an a 3 6-= cQ 44 eC a3 E aC L N . @ . . . .

>= 3 4 e >=

-s m g >=. N. >=. >= >= D- >= >= >= >= *= >= >=

Lad esa ed

. >=. . . . >=. . . >=. . >=. .

ma =* J .J .J aC & .m o .J .J a .J J .,J .J .J J =6 =a .J J M O 3 m o vi e aC u o e M O.

al as .ns *=== *== m *==

sad

==m e== m *== m === *== *.'m e e== === *== m m tn.s N N N E =.= N N N N N N N N N N N N

=

N N N N N N N N N N N N E N % % % % % % %%

O N O O O O O O O O w %, w w w .O .O .O, w w O O O O O w w w w w w w w 2 ==. m O O ao O == O O O w O O O O

-e == O O a -* N -.e O O O O O O O O O O O O O o-- @ O 5 CC te s w tad ted Las had tad 64 6as Lad had aC % had nad 6s a ned ned ns.s Ln.a 3m s.*

O .=e . . . . . . . . . . . . . .

N @ O e @ -* N a". @ N to 'a @ m G3 a.e w

a

-n e-o *

.C **

.u.e . @ . . . . . . . . . .

N e- . . . . .

>= a.= >= >=

} >=. >=. >=. >=. . >=. . >=. . . >=.

>= >= >= t- >=

.J == . . . . .

e.a ed u.J e.J .J ad =J a a J _J es d ups M ge I

,a Ow m 4 m 4 m m m m mm m

== a2 @ @ @ @ @ @ @ @ @ @

4 ft ntt e e e m stl mz e e o e e e o o e e a e o e o e e aC 3 N N N N N N N N N N N e

>= E w w w N N N N N N N 4r er T T T T T T w w er w T w w w

Lad O M p .J== w G @ O m

@ as- N O == w @ CD Aa N O m ntt e A O O ** m M w w w N N gu @ @ @ a.= =e M e e.e me s.e a w I 5 e e a e 1 ==

e-. N N at m e o c c e o We 6 9 5 0 e

9 e t e a t/l E G3 hs E u te. N N m 3 3

g ==

e W

e e e et g G3 u La cg e-.

49

WTE ENNE ISOTOPES H. GROUN0 WATER (See Tables H-1 and H-2)

STATIONS 11, 47 Groundwater was collected from two stations quarterly and analyzed for gross beta and gross alpha activity, for tritium and for gamma emitting radionuclides. Station 11 is 0.15 miles from the plant and station 47 is 25.75 miles from the plant.

The gross beta activity averaged 7.6 pCi/ liter which is statistically

. similar to past years. There were no detections of alpha activity. There were no detections of gamma emitters above the normal level of detection.

The tritium level averaged 157 pCi/ liter for the year which is the normal environmental level.

There was no difference in levels of beta activity or tritium for the station close to the plant as compared with the more distant station. It may be concluded that there was no impact from the operations of CNS on the environment as shown by measurements of radionuclides in groundwater.

50

Q Q Q N - Q N O Q Q 3 O Q Q m w w w w w w w W

>@ m e N z g3 eN e N e eN eN eN (N gN e mm e NN m%e NN e m% e DN O e %Q N e Ce C e oe ON MN e C e

% e N e . . .

4Q > Q e > > > >

wm e N e e e =

w J Q. w J J J J Q Q Q m m C N O O Q Q Q Q Q w w w w w w w w w@

We N Q m Q zw ase .NN .N .N *N eN (m MO e Q% o m% e @%e MN e mN e UN NW Q e Q 8 O e oe ON M e N e N e e o e VC > N e > > > >

b e . @ e e *

M J @ w J J J J Q Q Q - m O N O O Q Q Q Q Q M w w w w w w w w@

> w we m W

a O

= E X MN Mm

N TN e CN

NN e

N

@N e MNe

N *N T% e mN CN e M Q DN Q e Nm Q e Q e

> E a O% Q e a e M e M

M Qm w e m *

e

= m W VQ > @ e > > >

Q > > M @

C e e N e * *

( C % N J W w a J J m e

M > 3 e w M U m 3 e E e Q m Z L < > e w 4

w U d 3 K J = U Z w J Q O m Q Q N N m J D > > Q Q Q Q Q 4 m E < < Q Q Q

> 3 E 1 m w w w w w

& M Q w@

w w w w w Z km m a m =

4 A M 3 EN .N

N G3 *N M Q D Q .N eN .N@

M (Q MN e NN @No m%e w% e QN e Q M K DN Q e NW Q e Q e 4 U C Q O% M Q e Nm e

K 4 m M e m

e @ e o e N M WC > N > >

w w @

e > w e E

e e @ e o e e m m J N w J d J m w e e e e e e D D D D D >

@ @ W W W W Vm Vm Vm Um Vm Vm e 9 e 9 e 9 e 9 e 9 e 9 Uw VW Vu VW Vw Uw wO w0 WO wO wO wO ew de ew dw ew me M%G M%G M%G M%G M%G M%G C e m C em C em C e m C e m C e m 9W C 9wC 9w C 9wC 9aC 9aC

@W9 %%9 %@ 9 W W9 @@9 @@9 EUL EUL EV6 EUb EV6 EV6 Z

Og "w N N N N N N Mm T T T T T T (E o e o a e e m

>= = = m m m m ME m m m M m M g h O

9 u

9d w 4 9 EO h WQ & w Eb N am a o m 9w m Aw 9 4 Q mQu m EU e e W M & a m 43 L b e a ha e e ME Q Q M M4W W Z 51

m- =. ,-m m ,== m' ,== m e ,== = ,=. . ',== ,m ,== m N N N- N N N N N N N N N N N N N N N N N % % % % % % % % % % % % % % % %

C C wC Ow O C C O O O C O O O O O -Q O w w w w w w w w w w w w w w w w

==e N O O e.e O m O O ** == 0 C O *= ** 'N *e M C O ' Q O O Q Q O O C O O O O O O O O w@

>= a3 w ted w w w w nsJ w w w w La.s W w w w w w M%

C Pm

3 N . . e o e o e e o e . . . e e o e o Q% @ N @ @ ame em -e N P== @ a=e N N @ see @ ee =e O

R ee 6 w e e e e e e e e e e e o e e . . e a e >=, >= >= >= >= >= t= >= a= e= t- >= >= >= >= >= e >=

e e e >=. . e e o e e e e e e e .

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N N N N N N N 'N N N N N N N N N N N N % % % % *==. N % % % % % % N e==. % % N O O O O O O O O O O O O O O O O C C w w w w w w w w w w w- w w w w w w w

== ao O O O O O O O .o =* O O = ** -e -. O at O O O O O O O O O O O O O O O O Q Q w@

~

= as w w tes w w ted ted w w w tea w nad w w w w w at %

ag g

2 N e e *

e * * . * * - . . e e e e e ON T @ M T @* .m P=. er @ M @ M M N == M W P==

N 13 0

n. e o e o e e e . *

e o e o e . . .

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.

e o e e e e e o e e e e e e o e

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>= w u E am e cg amm n .==. ,w= m a .== a== .= man an. ,== ===. ,== ,== a== n=

ag O N N N- N N N N N N N N N N N N N N N

>= E e % % % % % % % % % % % % % % % 'a.

m N %

en O aC O O O O O O C O O C O O O O O O O O

== == w - w w w w w w w w w w w w w w w w w w O we e- %

et et % M .=* .-e O O O O O O C .-* -s O O O O N O ct >= 3 - w@ O Q O O O O O O O O O O O O O _ e-o Q O O w @ u W a3 N 3 8 CL MN ned nad w w ned had 6.d w ned haJ ned nad nad Led nad W tad W 0 O M 4 ene 3 h eC 1p= 8 3N w aC Q%

e e e e e o e o e e * * *

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J e- y I w 13 O G3 J 3 >'= p= C aC e E aC aC N e * * * * * * *

e * * * * * * * *

>= 3 h 3 >= >= o- >= >= >= >= >= >= >= >= >= >= >= >= >= t== e-b M C3 e e e a e o e e e e o e o e e o e e w w 3 .d a J .4 J J .4 .J .J .J .J .J .J .J =& J .J =J eC Q. CE 3 3d O 3 O

@ Q @ QC et u O 4.3 CE C6 33 se n==. asum e== .== ==m. a= a==. --. a== m a== m e== a== a .am. oma o=.

had ned N N N N N N N N N N N N N N N N N N E N % % N % % N % % % % % % % % % % %

C O O O .O, C O O C O C C O O O O O w w w w w w w w w w w .C w w w =, w CE -e == 0 C C O O O O == Q O O O O == N O 64 @ O O O O O O O O O O O O O O O O O O

>= a; oc % w w nnd ned sad had 6ed w 6e.e w 6ad w ts.s W ned had w ns.s et O 3N Q% e - e e . . e e e o e e e o e e e e se M @ M er Pm er G3 er er M @ gr er @ N M ao @

- C

+

e e o e e e e o e e e o e e e e o I'= >= >* N @'= >= W 0= N >= >= >= >= >= p.P >= >= OE=

e e e e a e e e o e e o e e a e e e u.O ed $ a.d M M d .d .uO ed d .J .d ed g.d ed .md M t

E CC Ce N P% N N P. Pm N N P=. N P=. Pm P% N P=. Pm P= Pi.

- a3 gr. W tr g gr. g gr er g gy

>= g er. er. er. er. . T. . er. er. er. . .

et ::3 e .o ,e e == .e -e e e

, == 3 -o ,e ** en we .e ao ce me se s=e e ew me e =,=e w

beJ O M @ er Pm O em er @ O

.J== er a3 @ O @ @ Q C =e mm ir er er N N bw P=. O @ @ @ @ @ @ *== == M s-a a=* == == =e N N Eu e ur 9 I e e e a O 9 pe e t 9 e e e e et 3 e e C O e O C n= 3 3 e e e a0 S g eC &

ME G3 aus E W 6e. W N N CE CE == u W G3 u u cm W 52

TTELEDYNE ISOTOPES I. RIVER WATER (See Table I-l and I-2)

STATIONS 12,28 River water was collected monthly and monitored for gross beta and gross alpha, suspended and dissolved, Sr-89 and Sr-90. A quarterly composite was measured for gamma emitters and tritium.

There were no detections of gamma emitters above the normal level of detection. There were no detections of Sr-89 and one detection of Sr-90 at Station 12 at a level of 0.490 pCi/ liter, which is below the normal level of detection.

The average gross alpha and grcss beta readings were similar to previous years as indicated in the summary of 1985 and 1986 averages below:

1985 1986 Average pCi/ liter Average per/ liter Gross Alpha 3.9 4.7 (dissolved)

Gross Alpha 2.4 7.5 (suspended) -

Gross Beta 8.3 9.4 (dissolved)

Gross Beta 6.4 11.8 (suspended)

These gross alpha and gross beta results show seasonal variations with a rise in suspended particles with weather and flooding that stirs up the river bed and any naturally occurring activity.

These measurements indicated that water samples monitored during 1986 contained no detectable CNS plant radionuclides. Additional verification that no detectable releases occurred was that the tritium activity was at a normal environmental level of 196 pCi/ liter and there was no difference between the station upstream of the release point and the station down-stream.

l 53

n 6

8

/

8 0 0 0 0 0 0 0 0 1 2

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R8 A/ 1/

64 5.6 0 2/ .

5. 60 7/3 5. 60 1/ -

6 9/-

6 2.2 8 1/2 0/ .

U6 37 48 61 62 O- 0- 1 Q0 - 1 - ; - t - 1 -

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R T W E y _

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T U P A p R3 E E E E E E E E e P R W E0 E E ) E h E E I - ) ) )

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R6 A8 665 1/ .

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t n

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f r _

. . . . . . e v v v v v v v p e e e e e e e s

d. al d. al d. al d. al d. al d. al d. al i dt dt dt dt dt dt dt t o t o t o t o t o t o t o n st st st st st st st a e e e e e e e tnat/.n g tnat/.n g tnat/.n g tatn /.n g inat/.n g tnat/.n g iat n /. g c

s n

eea eea eea eea eea eea eea a Md r Mdr Mdr Mdr Mdr Mdr Mdr m m

a g

d n

a h

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i

. . TTELEDrfEE ISOTOPES ~TA8LE I-1 NEBRASKA PUBLIC POWER DISTRICT l

( COOPER NUCLEAR STATION EXPOSURE PATHWAY - WATER 80kNE WATER - R IVER.

pCi/ liter I

SAMPLE SIATION lst QUARTER 2nd QUARTER 3rd QUARTER NUCtIDE NUMBER 4th QUARTER 01/06/86-03/10/86 04/07/86 06/16/86 07/07/86-09/09/86 10/06/86-12/08/86 K-40 12.28 Meantstd.dev. L.T. 5 .' E 01 7. E 01 6. E 01

[ L.T. L.T. L.T. 6. E-01 det./ total 0/2 0/2 0/2 0/2 range -- -- -- --

I-131 12.28 Meantstd.dev. L.T. 1. E 01 L.T.. 5. E 02 L.T. 6. E 01 L.T. 2. E 02 l det./ total 0/2 ' 0/2 . 0/2 0/2 -

range -- -- -- -- ^!

i Cs-137 12,28 Meanistd.dev. L.T. 4. E 00 L.T. 5.. E 00 L.T. 4. E 00 L.T. 4. E 00 l det./ total O/2 0/2 0/2 0/2 range -- -- -- --

u '

ui on 1 i

l 8

4

a f., 1

= , m m .=.t ,=. m e a m ,-= m = - m -. %

N N

% N

e+

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N N N N N N

N N

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= w .O.,

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6.4 e.e e== e i g@ e e e e e . e e' e e , e e o e a e .

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() (

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.a O * . e e *

e * >=. * * . * * * *$ e w -= J J J J J .J J .A .J .J J .J .J J .J J =J J t

e w+

m a m , m a ,

, ,e. .== ,=. . = ,* .== em <== .== ,=. m .=. e N N N N N N N N N N *N ,N N N N N N N h

% % % % % % % % % % % N N % % % % % -

c

( @

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9 8== a ed M@ . e o e o e o e o e . e e o e o e o e eC CD w %O gr er e.e er CQ e @ er 40 er er N pe F1 == CQ 3% 4 O D'= u o e e e e e e o e e e o e e o e e g V *= >=e >= >= > >= >= >= >= >= >== >= > >= > > e- > W L9 N.= e e e e e o e e a e e e e e h

MC J d .J J .J =J =J .4 .J .J .J J .J .J J ene g( a e J 0

>= La

= 6 .G

.d

.v g n ,=. .=. m m .= e-= e-= m m .== ,-. .== .-= e-= m a e Cir. O N N N N N N N N N N N N tais N N N N N O

>= 2 CD % % N N N N N N N N N N % % N % N N CL Q CE @ O O O O O O O O O Q Q O O O C O 5 M. == w .O, w .O.,

O w ==

to s., w w w w w w w ==, m, w w w w o

,'o u eC eC 2 @ == ==* O O aa Q O O e-o N O ... N 5 >= 3 tad a C O O O O C Q Q Q Q O O o 3 O O O O M 6.d M :se N N, -

N 3 1 e == 6 3 40 nnd sad 6ad tad had Les had had Lad med 6ad saa had n.J 6.J e. sad had 6 s O E Cg @ 6ma O e

= CL EC >= *d e-

4

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n.J et e . . e . . . e . e e e e e 3 sf e

/ .

6 taJ W .J ==. et CD CD N er @ N c @ r% .* er m e gi's 06 m gr e we e

.J == U Z lcc % N 3 CD a 3 >= g ad

ON C7 aC CD E aC i U C e o e a ', e e e ,. . e . . e e o e

>= 3 CL et- Ch 4% >= e= >= >= 'e >= >= >* >=' >= >= >= >= >= >= >=. >. t

& CE 3 =e >=. . . e ,

e e o e e e e g n=4 Led NQ a J .J a .J .4 -J .l .J .J .J J .J J .a .4 e .J =a aC CL M hs O 3 C A O M e ,a o 4 W Q g

.C N 2 p z< === ,== ,== .=== .== m ,ae ,== ,-= ,.-en ,== ,== .-. .== ,== a.= ,== g ka# had N N N N N N N N N N N N N N N N N N ag E @ N % % % % % ' 's N N 'N N % % N N % % % 6 CC O O C O .C, .C, wC .O, O .O, C C O Q C Q

% w i., =., w w w w w .O .O, w = . . .O. %

C s

== == == O O O - O C O O == - O O O == == N O w m

C O Q o o O Q c o O o O Q Q Q Q Q o CL 3Q had kaJ had had LeJ had ned had had 6ad bna had had bad ned b.d bad had @

w e -

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2 CC - * * . . . . . . . . . . . .

. c

C % v @ M er @ er CD 4 @ M me er er @ ,, er .e @ g O@ u CC e

% e e e o e e . .

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. e t."e . . . g

~

I a a a a .d a .a J J . .J a .J .J a .,J .e e g

)I

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+

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== CO CC CD CD CO CD r e CD CO 33 CO 2 CD CO CD CD CO CO 9

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>* O N N N N N N tv N N N

== AE -e e e N. .N= == . N. . ae e .N . .Ne .N N.

. N.

. g 11J 3 R we 40 m

b ed hs NO N @ T N O P4 w @ @ (

b a.d *= *P CD @ C A 4 O O -e m m e er er N N em - ~ O o e o @ @ cn - - m e r. - N N ZU e e e e e e e o e =e e e e 6 e e e ,==

C % e C C 5# O C 6 3 3 e e e g e as et g as MZ i Je .m E U ha. W N N M QC *= U W G3 U U Cg >= w 56

?

WTELEDYNE ISOTOPES J. AMBIENT RADIATION - THERM 0 LUMINESCENT 00SIMETERS (TLDs - SEE TABLES J-1 AND J-2)

.., STATIONS 01-10,20,44,56,58,59,66,67,71,79-91,94 Ambient radiation was monitored at 32 locations within a 10 mile radius of CNS and collected quarterly. The quarterly averages for all stations of ambient net gamma radiation ranged from 16.3 milliroentgen / quarter to 27.7 milliroentgen / quarter. The highest exposure during each of the four quarters was at Station 01 (0.1 mile, 225 degrees) and averaged 27.7 mR/

quarter. The lowest exposure was at Station 09 (7.25 miles, 335 degrees)

r. and Station 01 (10.0 miles, 160 degrees) and averaged 16.5 and 16.3 mR/

p, quarter respectively.

The radiation at station 44, (10.5 miles, 270 degrees) which is the control station, was an average of 20.9 mR/ quarter. This was similar to oth~er stations and to the average of all stations which was 18.5 mR/ quarter.

The average' total exposure for the year was 73.9 mR which is consider-ably below the 125 millirems per quarter specified in 10 CFR 20.105 for an

< unrestricted area. The relationship between milliroentgen (mR) and millirems (mr) is approximately one for the exposure conditions encountered. No plant effect from CNS was indicated.

t t

t 3

57

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

a ,

O '

- h:,;.L 4 A. '.s i V

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- vbe ,

e ;g g m -.

a;*p. : j;

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l. <

y -

v.,, , . 3,,~ . ' W'* '

+..

. z;.

TTELEDVNE leiOTOPES --

TABLE J-1 y ^

-u NEERASKA PUBLIC POWER D151SICT ,

, ..- 2 COOPER NUCLEAR STATION EXPOSURE PATHWAT - AMBIENT GAMMA RA0!ATION: TLD

~

MILLIROENTGEN / QUARTER SAMPLE STAil0N g -s lst QUARTER 2nd QUARTER 3rd QUARTER NUCLIDE NUMBER 01/03/86-04/01/86 4th'QUARTFR-04/01/86-07/02/86 07/02/86-10/01/86 10/01/86-01/02/87 TLD 01 30.8 2 4.1

, Gamma 24.4 2 7.2 33.2 1 3.4 22.4 1 2.4' '

02 - .-15.6 1 0.8 17.3't 0 5 r ? 17.5 t 0.8' 17.7 2 0.8

\ - ' .'. . - .

(. .

"' 0 3 16.2 1 0.6

15.8 t 0.1

.V. . .

19.7 1 0.5 17.4 t 0.8 '%

04 14.3 1 0.7 16.4 1 0.6 19.1 2 0.9 17.1 1 0.6' '

, 05 14.4 t 0.6 17.0.1 0.4 g 5 s17.0 t 0.5 17.8 1 0.9 s

06 16.1 2 0.9 16.5 t.0.y 16.4 2 0.9 21.6 2 1.9 #

s 1 07 14.8 1 1.3 ' 16.2 2 0.7 17.7 1 1.0 17.1 2 0.7 m

08 15.4 t 1.1 16.5 t 0.6 19.7 t 0.8- .8.4 2 1.3 09 14 8 1-1,6 16.4 2 0.5 16.8 2 0.5 ,16.9 2 0.7 , , "

.y 10 14.3 t 1. 5 ,, 16.7

0.7 "

16.7 t 0.6 17.3 t 0.7 20 16.4 2 0.5 17.5't.0.5

18.6 t 0.4 zg - -a ( b ) . ,Yx '-

~

44 -

18.8 1 1.3 19.8 t 0.6 O.

~

- 24.0 2 0.7

'e ' %;T'21.0 ;_,. t 1. 2 w. ,

4-56 17.3 t 1.4 17.6 2 0.7 '

22.2

0.5 .,

18.0 * ,0.9 ,

58

.s :. - - *

~

17.4 1 0.4 18.1 2 0.7 (a) 7'# 4 - # .. ~19.4.2 1.5: % w.

59 17.0 t 3.8

-18 8 2 0.9 18.9

0.5 20.3 t 1.0 h ~ _; ~',.m 66 20.2

1.3 V.-19.I's 0.7 23.5 t 1.1 20.3 L'l.2 Ty ..'

, s n 67 19.7 2 0.5 18.2;t-0.7 19.1 1 0.8 19.8

1.0 --

71 20.9 1 1.3 18.4 2 0.7 18.8 1 0.8 19.3 t 1.2

- 7 .

a.* . . . ' ~

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sr 4 7. 1

,'s ,

'f) l' '

-u ,4 n y; " '

s

' ' : t

' TABLE J-l . e 'A -

+ , ~

I 'iw D NE8RASKA PUBLIC POWER DISTRICT .2 't-4/ 44< z,

. COOPER NUCLEAR STATION

f. -%j; , ;

' ~

y,

t

' Oh[ -'

_3 ~

r .

EXPOSURE PATHWAY - AMS!fRI GAMMA RADIATION: TLD -

,i : .

MILLIROENTGEN / QUARTER SAMPLC stall 0N lst Qil AR T ER 2nd QUARTER _'3rd,40ARTER 4th QUARTER' NUCLIDE __

NUMBfa _,,,,_ _ 01/03/86-04/01/86 04/01/86-07/02/86 07/02/86-10/01/86 10/01/86-01/02/87 it 0 79 19.5 2 0.7 18.4 1 0.9 Gamma 16.7 2 0.6 18.4 1 0.7 FO* 19.7 1 0.5. 18.0 1 0.9 18.6 2 0.8 .(c) 81 19.7 1 0.7 17.0 2 2.3' 17.4

0.9 16.6 2 2.1 82 20.0 t D.8 17.5 t 0.6 18.7 2 0.9 18.610.9 83 18.6

1.2 18.2

0.9 19.7

0.7

~

17.4 t 2.3 . ,

84 l 20.2 t 0.9 22.7 t 1.2 21.2 1 1.0 19.6 1 1.5 1 85 17.2 t 1.2 16.9 1 0.5 17.1

0.7 17.6 t 0.6 i

86 16.4 1 2.0 17.9 1 0.5 17.5 t 0.9 18.3 1 0.8 87 17.9 2 0.8 17.2

0.7 .17.1 i 0.6 18.0 t'l.1 m

88 17.4 t 1.0 16.2 2 0.7 16.4 t 1.2 17.710.7 89 19.1 1 0.7 16.9 2 1.4 18.5 t 0.7 20.9 i 0.7 90 19.5 t 0.9 17.1 1 0.7 18.1 1 1.2 20.7 t 1.0 91 18.6 i 0.8 19.0 t 0.8 19.0 2 0.6 18.3 1 0.5 94 16.8

1.5 17.4 2 0.7 21.3 t 1.1 18.9 2 0.9 Average / Quarter 18.0 1.3.0 mR/88 Days 17.8 t 1.8 mR/92 days 19.3 2 3.2 mR/91 days 18.8

1.5 mR/94 days Average / Day 0.20 t 0.03 mR/ day 0.19 0.02 mR/ day 0.21 1 0.04 mR/ day l Range 0.20 t 0.02 mR/ day 1 (14.3-30.8) mR/88 days (15.8-24.4) mR/92 days (16.4-33.2) mR/91 days (16.6-22.4) mR/94 days Det./ Total 32/32 32/32 31/31 30/30 (a) The TLD from Station 58 for the third quarter (07/02-10/01) was alssing from its loc'a tion.

(b) The TLD f rom Station 20 for the fourth quarter (10/01/86-01/02/87) was missing from its, location.

(c) The TLD from Station 80 for the fourth quarter (10/01/86-01/02/87) was missing from its location.

r

TTELEDfNE ISOTOPES . TABLE J.2 NEBWASKA PUBLIC POWER DISTRICT C's 0PER' NUCLE AR STATION EXPOSURE PATHWAY - AM8 TENT GAMMA RADIATION: TLD MILLIR0fMTGEN SAMPLE STATION Aver./ Quarter NUCLIDE Total mR/ year NUMBER 01/03/86-01/02/87 +

01/03/86-012/02/87 01 27.7 1 5.1 110.8 02 17.0 t 1.0 68.1 03 -17.3 1 1.8 ,

69.1 04 16.7 t 2.0 66.9 05 16.6 1 1.5 66.2 06 17.7 1 2.6 70.6 cn 07 16.5 t 1.3 o 65.8 08 17.5 t 1.9 70.0 09 16.5 t 0.5 65.9 10 16.3 t 1.3 65.0 20

17.5 t 1.1 52.5 (b) 44 20.9 1 2.3 83.6 56 18.8 2 2.3 75.1 58 18.3 t 1.0 54.9 (a) 59 18.8 1 1.4 75.0 -

66 20.8 1 1.9 83.1 67 19.2 i 0.7 76.8 71 19.4 1 1.1 76.7 I

I

4 TTELEUVNE ISOTOPES TA8LE J-2 s

^i

.NE8RASKA PUBLIC POWER OISTRICT COOPER NUCLEAR STATION' EXPOSURE PATHWAY - AMBIENT GAMMA RADIATION: TLO .

MILLIROENTGEN

,j SAMPLE STAil0N Aver./ Quarter NUCll0E NUMBER Total mR/ year 01/03/86-01/02/87 01/03/86-012/02/87 19 18.3 1 1.2 73.0 80 18.8 t 0.9 56.3 (c) 81 17.7 t 1.4 70.7 82 18.7 t 1.0 74.8 83 18.5 t 1.0 73.9 84 20.9 t 1.4 83.7 ES 85 17.2 t 0.3 68.8 86 17.5

0.8 70.1 87 17.6 2 0.5 10.2 88 16.9 1 0.7 67.7 89 18.9 1 1.7 75.4 90 18.9 1 1.6 75.4 91 18.7

0.3 74.9 94 18.6 t 2.0 74.4 18.5 1 2.1 Aver, mR/ Quarter 13.9 2 8.8 Total mR year All stations Range (16.3-27.7) Range (65.0-110.8) (St ations 20, 58.80 not (a) The TLO f rom St at ion 58 f or the third quarter (07/02-10/01) was missing from its location. included.)

(b) The TLO from St ation 20 for the 'ourth quarter (10/01/86-01/02/87) was missing from its location.

(c) The TLO from Station 80 for the fourth quarter (10/01/86-01/02/87) was missing from its location.

l WTELEENNE ISOTOPES K. VEGETATION, BROADLEAF (SEE TABLES K-1 and K-2)

STiJIONS 35, 92, 93 Broadleaf vegetation was collected each month during the growing season, May through October. Three samples were collected each month from each station plus a quality control sample. The samples were tested for I-131 by chemical separation and for gamma emitting isotopes by high resolution spectrometry.

The naturally occurring isotopes Be-7 and K-40 were detected in all of the samples at normal environmental levels. Thorium-228 also a naturally occurring isotope, was detected in five of the 60 samples radioassayed.

In the second quarter of 1986 vegetation was affected by the accident at the Chernobyl reactor in the Soviet Union on April 26, 1986. Radioiadine was' detected in 19 of the 20 samples collected in May and June at an average level of 0.39 pCi per gram wet. These samples were analyzed by the chemical separation method.

Several additional fission products were also detected in the gamma spectroscopy analysis. The short-lived isotope Ba-140 was detected at Station 92 in one of the samples collected in May at a level of 0.096 pCi/

gram, wet. The fission product Ru-103 was detected in 19 of 20 samples at a level of 0.22 pCi/gm, wet. Cesium-134 was detected in 18 of 20 samples at a level of 0.19 pCi/gm, wet and Cs-137 in 19 of 20 samples at a level of 0.33 pCi/gm, wet. These fission products had disappeared by the third quarter of the year with the exception of Cs-137 which continued to be detected at a reduced level until the end of 1986.

Two detections of Co-60, a neutron activation product,were detected in the second and third quarter. One occurred at Station 93 at a level of 0.030 pCi/gm, wet and one at Station 38 at a level of 0.026 pCi/gm, wet. Both of these detections are below the normal level of detection. There was no difference between the indicator stations and the control Station 93 and no indication of an effect on vegetation from the operations of CNS.

62

R TTELEIWpE ISOTOPES TABLE K-1 NE8RASKA PUBLIC POWER DISTRICT COOPER NUCLEAR STATION EXPOSURE PATHWAY - INGESTION BROAOLEAF TERRESTRIAL VEGETATION - pct /ga, wet SAMPLE STATION 2nd QUARTER 3rd QUARTER 4th QUARTER NUCLIDE NUMBER 05/19, 06/09/86 07/07,08/11,09/08/86 10/06, 10/13/86 I-131 35.92,93 Meantstd.dev. 3.9 t 3.5 E-01 L.T. 2. E-02 L.T.. 1. E-02 By Chemical det./ total 19/20 0/30 - 0/10 Separation range (0.2-II.0)E-01 -- --

Be-7 35,92,93 Meantstd.dev. 4.2 2 2.4 E 00 4.8 t 3.0 E 00 9.5 2 6.4 E 00 det./ total 19/20 30/30 10/10 range (0.3-10.1)E 00 (1.2-14.3)E 00 (1.6-19.0)E 00 K-40 35,92,93 Meanistd.dev. 13.9

8.1 E 00 16.4 2 8.4 E 00 21.0 t 7.9 E 00 det./ total 20/20 30/30 10/10 range (3.1-35.4) E 00 (7.3-37.0) E 00 (10.2-37.2)E 00 Co-60 35,92,93 Meantstd.dev. 3.0 t 1.4 E-02 2.6 1 0. 7 E-02 L.T. 9. E-02 det./ total 1/20 1/30 0/10 range -- -- --

cn I Ru-103 35,92,93 Meantstd.dev. 2.2 t 1.4 E-01 L.T. 9. E-02 L.T. 9. E-02 det./ total 19/20 0/30 0/10 range (0.4-5.5) E-01 -- --

I-131 35,92,93 Meantstd.dev. 1.7 2 0.8 E 00 L.T. l. .. E 00 L.T. 1. E 00 By Gamma det./ total 11/20 0/30 0/10 Spectroscopy range (0.4-3.00)E 00 -- --

C5-134 35,92,93 Meantstd.dev. 1.9 t 1.0 E-01 L.T. 6. E-02 L.T. 6. E-02 det./ total 18/20 0/30 0/10 range .(0.4-3.9) E-01 -- --

Cs-137 35,92,93 Meantstd.dev. 3.3 t 2.0 E-01 1.8 t 0.3 E-02 6.4 2 2.4 E-02

< det./ total 19/20 3/30 1/10 range (0.5-6.9)E-01 (1.5-2.0) E-02 --

{

Ba-140 35,92,93 Meantstd.dev. 9.6 2 2.2 E-02 L . T. . 3. E-01 L.T. 2. E-01 det./ total 1/20 0/30 0/10 range -- -- --

i q a TABLE K-1

.NE8RASEA PUBLIC POWER DISTRICT

, COOPER NUCLEAR STATION EXPOSURE PATHWAY INGESil0N c i

BROAOLEAF TERRESTRIAL VEGETATION - PCi/ge.' wet 3 SAMPLE $1Al!UN 2nd QUARTER 3rd QUARTER 1

NUEllDE .huMbik ___

05/19, 06/09/86 07/07.08/11.09/08/86 ~10/06, 4th QUARTER 10/13/86 Ra-226

35.9t,93 Meanestd.dev. L.T. 1. E 00 - L.T. 1. E 00 L.Ts 1. ^ E 00 i

det./ total 0/20 ' 0/30 0/10 j range -- -- --

1 Th-228 35.92.93 Meanestd.dev. 2.0 2 0.5 E-01 L.T. 1. E-01 2.8 2 1.4 E-01 i

cet./ total 2/20 0/30 '3/10 i range (1. 6-2. 3) E -01 ---

(1.3 1 4.2)E-01 I

1 4

cn 7

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I 65 '

\

W TELENNE ISOTOPES L. SHORELINE SEDIMENT STATION 28 Shoreline sediment samples were collected in the spring and fall from Station 28,1.8 miles,150 degrees downstream of the release point of CNS.

They were analyzed for gamma emitters by means of a high reclution gamma spectrometer. In the samples collected in the spring the naturally occurring isotopes Be-7, K-40, Ra-226 and Th-228 were detected at normal environmental levels. Cesium-137, a fission product, was detected at an average level of

- 0.069 pCi/gm, dry.

For the samples collected in the fall the naturally occurring isotopes were detected at about the same level as in the spring. Cesium-137 was found at a level of 0.107 pCi/gm dry. No other radioisotopes were assayed other than naturally occurring isotopes. Cesium-137 occurred in many media such as -milk, vegetation and soil in many areas of the United States and is believed to be from fallout due to previous atmospheric weapons testing and the accident at the Chernobyl Reactor in the Soviet Union on April 26, 1986.

66

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OR

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~

E ED LI 4 7 6 8 4 0 1 3 3 PL 7 0 5 6 2 2 3 1 1 2 MC - 4 - - 1 - -

2 AU e - n o - s s a SN B E M C h I

C C R T C)

TTElEDrNEISOTOPES TA8LE L-2 NE8RASKA PUBLIC POWER OISTRICT COOPER NUCLEAR STATION EXPOSURE PATHWAY - AQUATIC SHORELINE SE0! MENT - pCi/ge, dry ,

SAMPLE STATI0h -2nd QUARTER 4th QUARTER NUClIDE NUMBER 05/06/86 10/06/86 Be-7 28 L.T. 2. E-01 (0/2) 2.4 +-1,3 E-01 (1/1)

K-40 28 1.6 2 0.1 E 01 (2/2) ,

1.6 2 0.2 E 01 (1/1)

Mn-54 28 L.I. 3. E-02 (0/2) L.T. '2. E-02 (0/1) I Co-58 28 L.T. 3. E-02 (0/2) L.T. 2. E-02 (0/1) ,j Fe-59 28 L.T. 6. E-02 (0/2) L.T. 4J E-02 (0/1)

Co-60 28 L.T. 2. E-02 (0/2) L.T. 1. E-02 (0/1) -l In-65 28 L.T. 6. E-02 (0/2) L.T. 4. E-02 (0/1) fr-95 28 L.T. 3. E-02 (0/2) L.T. 2. E-02 (0/1) l m

03 Ru-103 28 L.T. 3. E-02 (0/2) L.T. 2. E-02 (0/1)

Ru-106 28 L.T. 2. E-01 (0/2) L.T. 1. E-01 (0/1)

I-131 28 L.T. .l. E-01 (0/2)' L.T. 1. E-01 (0/1)

Cs-134 28 L.T. 3. E-02 (0/2) L.T. 2. E-02 (0/1)

C5-137 28 6.9 t 1.2 E-02 (2/2) 1.1 2 0.1 E-01 (1/1)

Ba-140 28 L.I. 6. E-02 (0/2). L.T. 5. E-02 (0/1) j Ce-141 28 L.T. 4. E-02 (0/2) L.T. 4. E-02 (0/1)

Ce-144 28 L.T. 2. E-01 (0/2) L.T. 1. E-01 (0/1)

RA-226 28 1.8 1 0.1 E 00 (2/2) 2.1 1 0.3 E 00 (1/1)

Th-228 28 1.0 t 0.0 E 00 (2/2) 1.1 2 0.1 E 00 (1/1)

-v - - - - - - , --- - - - - - - - - -- - - - - ----- -- ---,,---- - -,-- - -,--- - - - -------- --------- - - - - - - - - - - -

APPENDIX e

e 0

l

APPENDIX A LAND USE CENSUS O

LAND USE CENSUS Cooper Nuclear Station (CNS) Radiological Effluent Technical

. Specifications require an annual land.use census. 'This csnsus identifies the location of the nearest garden that is greater than 500 square feet in area and yields edible leafy l v:getables, the location of the nearest milk animal, and the location of the nearest resident in each of the 16 >

meteorological sectors within 3 miles of CNS.

i. . .

MNn) changes haveLoccurred in the nearest resident category

! oince the 1985 land use census. Sector K no longer has a resident living within'3 miles of CNS. In 1985, a resident in Sector K lived 1.8 miles from CNS. At the time of the 1985 land use c:nsus, the nearest resident in Sector L lived 1.3 miles from CNS.

This residence was found to be abandoned at the time of the 1986 ~ 1

' Innd use census. The nearest resident to CNS in Sector L in 1986 lives 1.4 miles from CNS.

Fcwer and smaller gardens were found in 1986. The 1986 census revealed no gardens within 3 miles of CNS'in three sectors '

, (Sectors E, G, and Q) that had gardens in 1985. The closest

~

. gardens to CNS in Sectors F and L during the 1985 census either ware abandoned (Sector L) or did not meet the above-mentioned specifications in 1986 (Sector F). .The nearest gardens in Sectors F and L in 1986 were 2.7 miles and 2.2 miles, respectively, from CNS.

4 No milk animals were found within-3 miles of CNS in 1986. This j was also the case in 1985.

I i

t i

k I

A-1 J

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

n Land Use Census July 10, 1986 0-3 Miles Sector Nearest Resident Nearest Garden Nearest Milk Animal A 3.0 Miles 5.0 None- None B 2.4 Miles '14.0 2.7 Miles 13.0 None C None None None D 1.7 Miles 62.0 None None E 1.8 Miles 92.5 None None F 2.0 Miles 116.0 2.7 Miles 108.0 None G 2.2 Miles 133.5 None None H None None None J None None None K None None None L 1.4 Miles 230.0 2.2 Miles 227.0 None M 1.3 Miles 251.0 1.3 Miles 251.0 ' None N 1.0 Mile 266.5 1.0 Mile 266.5 None P 1.6 Miles 293.5 1.6 Miles 293.5 None Q 0.9 Mile 307.0 None None R 1.9 Miles 335.0 1.9 Miles 335.0 None A-2

k.

APPENDIX B INTERLABORATORY COMPARISON PROGRAM r -

i l

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

m --

, ,1 i

M TELEDVNE l 180 TOPES 1986 i

l A Summary of the Results of the Analyses by Teledyne Isotopes of the EPA Cross Check Samples Compared with the Known Activity as reported by the Environmental Monitoring Systems Laboratory, Las Vegas, Nevada All results which exceed two sigma deviation from the known are appended with a note giving the possible cause of the deviation and corrective action t aken.

B-1

I

' WTE.EME 80 TOPES US EPA CROSS-CHECK PROGRAM 1986 Collection Teledyne Date Media Nuclide EPA-Results(a) Isotopes Results(b) 01/10 Water Sr-89 31.00 t 5.00 30.00

1.00 Sr-90 15.00 i 1.50 15.33 i 0.58 01/24 Water Gross Alpha 3.00 t 5.00 4.00 t 0.00 Gross Beta 7.00 i 5.00 7.33 i .0.58 01/31 Food Sr-89 25.00 t 5.00 23.66 1 1.15 (c) Sr-90 10.00 i 1.50 23.66 i 1.52(d)

I-131 20.00

6.00 18.00 i 1.00 Cs-137 15.00 i 5.00 '19.00 i 1.00 K 950.00 *143.00 959.00 t 62.35 02/07 Water Cr-51 38.00 i 5.00 L.T. 86.66 Co-60 18.00 t 5.00 18.66 i 0.58 Zn-65 40.00 t 5.00 46.33 i 5.77 (e)

Ru-106 0.00 i 5.00 L.T. 40.00 Cs-134 30.00 t 5.00 26.00 t 3.60 Cs-137 22.00 1 5.00 21.66 i 4.93 P

02/14 Water H-3 5227.00 1523.00 5266.67 i 57.72 02/28 Mi1k I-131 9.00 t 6.00 9.00 t 0.00 03/21 Water Gross Alpha 15.00 t 5.00 12.00 t 2.00 Gross Beta 8.00 t 5.00 9.33 1 0.58 04/04 Water I-131 9.00 i 6.00 10.00 t 0.00 04/20/86 Lab. Per. Gross Alpha 17.00 1 5.00 21.33 1 1.52 Ra-226 2.90 1 0.44 3.23 1 0.23 Ra-228 2.00 t 0.30 1.36 i 0.06 (f)

U 5.00 t 6.00 4.33 t 0.58 Gross Beta 35.00 i 5.00 32.66 t 2.31 Sr-89 7.00 t 5.00 4.33 t 0.58 Sr-90 7.00 t 1.50 7.67 1 0.58 Co-60 10.00 t 5.00 14.00 1 1.00 Cs-134 5.00 1 5.00 <5.67 Cs-137 5.00 t 5.00 8.00 t 2.00 B-2

~

US EPA CROSS-CHECK PROGRAM 1986 (Cont.)

Collection Teledyne Date Medi a ' Nuclide EPA-Results(a) Isotopes Results(b) 04/25/86 Air Filter Gross Alpha 15.00 t 5.00 17.66

0.58 Gross Beta 47.00 t 5.00 44.66 i 3.21 Sr-90 18.00 i 1.50 15.66 i 1.15 (g)

Cs-137 10.00 t 5.00 10.33 1 0.58 05/09/86 Water Sr-89 5.00 t 5.00 4.66 i 0.58 Sr-90 5.00 1 1.50 5.00 t 0.00 05/23/86 Water Gross Alpha- 8.00 t 5.00 9.00 t 0.00 Gross 8 eta 15.00 t 5.00 15.33 1 1.15 06/06/86 Water Cr-51 0.00 t 5.00 <92.7 Co-60 66.00 t 5.00 66.67 t 1.15 Zn-65 86.00 t 5.00 87.67 i 8.50 Ru-106 50.00 t 5.00 <48.00 Cs-134 49.00 t 5.00 47.66

0.58 Cs-137 10.00 t 5.00 9.33 t 2.08 06/13/86 Water H-3 3125.00 t 360.00 3033.33 i 152.75 06/27/86 Milk Sr-89 0.00 t 5.00 <3.66 Sr-90 16.00 t 1.50 15.00 t 0.00 I-131 41.00 t 6.00 41.00 i 1.00 Cs-137 31.00 t 5.00 39.00 t 1.73 (h)

K 1600.00 180.00 1593.33 t32.14 07/18/86 Water Gr-Alpha 6.00 t 5.00 6.00 1 0.00 Gr-Beta 18.00 t 5.00 14.66 t 0.58 '

07/25/86 Food Sr-89 30.00 t 5.00 23.66 t 1.15 (c) Sr-90 19.00 1 1.50 22.33 i 1.52 (1)

I-131 30.00 t 6.00 25.66 i 1.15 Cs-137 20.00 t 5.00 22.00 t 4.58 K 1150.00 t 58.00 1126.66 t 57.74 08/08/86 Water I-131 45.00 1 6.00 27.00

1.00 (j)

B-3 1

US' EPA CROSS-CHECK PROGRAM 1986 (Cont.)

Collection .

Teledyne Date Media Nuclide EPA-Results(a) Isotopes Results(b) 09/12/86 Air Filters Gr-Alpha 22.00 i 5.00 23.00't 0.00 Gr-Beta 66.00 t 5.00 64.33

0.58 Sr-90 22.00 t 1.50 18.00 t 1.00 (k)

Cs-137 22.00 i 5.00 23.33 t 2.08 09/19/86 Water Gr-Alpha 15.00 t 5.00 18.66 i 0.58 Gr-Beta 8.00 t 5.00 11.00 t 0.00 10/10/86 Water- Cr-51 59.00 i 5.00 <113.0 Co-60 31.00 t 5.00 30.33 i 0.58 Zn-65 85.00 t 5.00 84.00 t 5.29 Ru-106 74.00

5.00 <70.00 Cs-134 28.00 t 5.00 27.33 t 2.51 Cs-137 44.00 1 5.00 52.67 i 0.58 (1) 10/17/86 Water H-3 5973.00 1597.00 5900.00 i 99.98 11/21/86 Water Gr-Alpha 20.00 i 5.00 16.33 i 1.15 Gr-Beta 20.00 i 5.00 21.00 1 1.73 Notes (a) EPA Results-Expected laboratory precision (1 sigma). Units are pC1/2 for water, urine, and milk except K is in mg/f. Units are total pCi for air particulate filters.

(b) Teledyne Results - Average t one sigma. Units are pCi/E for water,

. urine, and milk except K is in mg/A. Units are total pCi for air particulate filters.

(c) Units for food analysis are pCi/kg.

(d) This sample is a synthetic food which may contain a substance which interferes with the strontium 89 and 90 analysis. Only 21 laboratories participated in the strontium analyses. Of the 21 who did participate 42.9% had results beyond the three sigma control limits.

B-4

e-

\;

US EPA CROSS-CHECK PROGRAM 1986 (Cont.)'

Collection Teledyne Date . Media Nuclide EPA-Results(a) Isotopes Results(b)

Notes (Cont.)

(e) The three results reported were 43.0, 43.0 and 53.0. The one high result of 53.0 caused the average result to be above the 2 sigma limit.

This sample was aliquoted last of the three samples and more of the spike may have settled in the bottom of the container.

(f) The spike level in this case was at a low activity. The three results were 1.4 i 0.6, 1.4 1 0.6 and 1.3 t 0.6. At this activity level the counting error is relatively high. If the counting error is taken into consideration, these results were within the 2 sigma deviation of 1.7-2.3 pCi/A.

(g) These air filters are counted for gross alpha, beta and gamma before being analyzed for Sr-90. It was felt that some of the activity had been lost in handling. The air particulate filters will be handled more carefully in the future. This had not been a problem in previous analyses.

(h) The efficiency calibration for Cs-137 for the gamma spectrometer detec-tors was checked and no reason for the high result was evident. Previous analyses did not exceed the 2 sigma limits. If this situation recurs, a new efficiency for Cs-137 will be determined. ~

(i) For Sr-90 fourteen of the seventeen laboratories participating were beyond the t 3 sigma level. For Sr-89 thirteen of the fifteen labor-atories had low results. It would appear that the sample is flawed in some way for this analysis.

(j) This analysts was performed by an inexperienced technician who has since received additional training and is performing satisfactorily.

l (k) It is believed that too much NaCo3 was used in the final precipitation of SrC03 resulting in a falsely high strontium-89 yield and a consequent low Sr-90 result. Less N5C03 will be used in the future precipitation of SrC03 -

(1) The data for the samples was examined and no obvious reason for the high result could be found. The Cs-137 calibration was checked and found to be in agreement with previous readings.. Since this was not a trend in previous analyses for Cs-137 in Water (Test 418 -0.023; Test 406 -0.11 developed). it was decided to follow the results to see if a trend B-5 .

l i

g- -

f'+#

APPENDIX C SLMfARY OF DOSES TO A MEMBER OF THE PUBLIC OFFSITE l .

4 DOSES TO MAXIttJM IhDIVIDUAL (MREM), JANUARY-DECEPSER 1986 GOPER NUCIIAR STATION JANUARY-DECEleER 1986 SPECIAL LOCATION e 1 SITE BOLSIDARY AT 0.67 MILES N ANNUAL BETA AIR DOSE = 1.58E+00 MIL 1 RADS ANNUAL BETA CAP 9tA AIR DOSE = 2.56E+00 MILLRADS e

PA11hY T. BODY GI-TRACT BONE LIVER KIDNEY THYROID LUNG SKIN

! ADULT 1.7 7E+00 1.76E+00 1.81E+00 1.76E+00 1.76E+00 1.90E+00 1.78E+00 3.37E+00 f TEEN 1.77E+00 1.76E+00 1.83E+00 1.76E+00 1.76E+00 1.95E+00 1.78E+00 3.37E+00 OillD 1.78E+00 1.76E+00 1.90E+00 1.76E+00 1.76E+00 2.13E+00 1.78E+00 3.37E+00 INFANT 1.76E+00 1.75E+00 1.77E+00 1.76E+00 1.76E+00 2.55E+00 1.78E+00 3.37E+00

?

COOPER NUCIIAR STATION JANUARY-DECENBER 1986 SPECIAL LOCATION # 2 NEAR. RESIDENCE AT 0.90 MILES NW

, ANNUAL BETA AIR DOSE = 3.47E-01 MILLRADS j ANNUAL CAtttA AIR DOSE = 5.63E-01 MI11 RADS PATHWAY T. BODY GI-TRACT BONE LIVER KIDNEY THYROID LUNG SKIN ADULT 3.91E-01 3.90E-01 4.03E-01 3.88E-01 3.88E-01 4.51E-01 3.91E-01 7.40E-01 TEEN 3.92E-01 3.90E-01 4.09E-01 3.89E-01 3.88E-01 4.76E-01 3.91E-01 7.40E-01 OIIID 3.95E-01 3.89E-01 4.27E-01 3.90E-01 3.89E-01 5.56E-01 3.91E-01 7.40E-01 INFANT 3.88E-01 3.88E-01 3.93E-01 3.90E-01 3.89E-01 7.41E-01 3.91E-01 7.40E-01.

i

_ ;m N

Summary of Doses to Maximum Individual at the Site Boundary; Resulting From Exposure to Radioactivity Discharged in Liquid Effluents, January - December 1986, Cooper Nuclear Station Dose, aren Total

. Period Skin Bone Liver Body Thyroid Kidney Lung Cl-LLI.

Ist Quarter 2.14E-04 2.55E-02 1.74E-02 1.66E-02 2.%E-03 5.52E-01 2.24E-03 3.10E-02 2nd Quarter 1.13E-04 -1.75E-01 8.53E-02 9.16E-02 3.79E 2.83E-02 9.84E-03' 2.98E-02 3rd Quarter 1.09E-04 6.13E-02 8.44E-02 6.18E-02 6.60E-03 2.81E-02 9.79E-03 1.90E-02 4th Qu.rter 1.64E-04 1.36E-01 2.05E-01 1.54E-01 2.54E-04 6.73E-02 2.32E-02 8.41E-02 Ltals for 1986 6.00E-04 3.98E-01 3.92E-01 3.24E-01 1.36E-02 6.76E-01 4.51E-02 1.64E ?

m

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APPENDIX D OMISSION OF ANALYSIS I

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OMISSION OF ANALYSIS The Radiological-Effluent Technical Specifications (RETS) require (Table 3.21.F.1) gamma isotopic analysis of each river water and milk (nearest producer) sample collected. During 1986, a gamma isotopic analysis was performed on quarterly composites of river water samples collected once per 31 days. Also, an isotopic analysis was performed on monthly composites of milk (nearest '

producer) samples collected once per 15 days during peak pasture period. The incorrect frequency of analysis was due to an error in implementation of the RETS.

This error was corrected as of January 1, 1987, so that a gamma isotopic analysis will be performed on all future river water samples and milk (nearest producer) samples.

D-1

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