ML20050C731
| ML20050C731 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 03/31/1982 |
| From: | CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| Shared Package | |
| ML18047A270 | List: |
| References | |
| NUDOCS 8204090302 | |
| Download: ML20050C731 (10) | |
Text
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1981 EINIRO?iME! ITAL M0?ITTORI!iO REPORT i
PALICADES I?UCLEAR PLAtiT COISUMER3 POWER COMPANY 8204090302 820331 PDR ADOCK 03000 R
A.
PADIOLOGICAL 1.
Introduction The data obtained by analysis of samples, taken during 1981, has been evaluated to determine if any increases in radioactivity levels in the environment are attributable to plant operation.
A summary of the data is presented in Table A-1.
Figure A-1 and Table A-2 provide the locations of the sampling stations. Statis, tical analyses of the data show that there has been no detectable increase in radioactivity levels of environmental media that can be attributed to plant effluents.
2.
Discussion and Interpretation of Results (a)
Air Samples Statistical analyses (at p <0.05) of the air particulate sampling results do not indicate a significant difference in gross beta concentrations between the indicator and back-ground stations, with the exception that some of the back-grou*d stations being higher than the indicator station.
No significant iodine-131 activity was observed above the minimum detectable level.
This is consistent with expected results based on actual plant effluents and site meteorology.
(b)
Lake Water Although statistical analyses for the total year do not indi-cate significant differences for tritium in plant discharge vs intake samples, data for the months of September and Nov-ember do indicate higher tritium levels in discharge smmples for those came months. Measured releases, based on samples taken from tanks prior to release for these renths indicated release of 80.75 Ci tritium in September and 58.3 Ci tritiun in November.
These amounts account for the observed concen-trations in discharge samples to within 30%.
In addition, gross beta in discharge during the second half of 1981 was statistically higher (by approximately 30%) than inlet sam-ples. This observation is consistent with the quantities of radioactivity actually released during this interval.
(c) prinking Water Monthly composite samples of treated and untreated South Haven municipal vater indicate only background activity. Gross beta activity ranged from less than 1 to 5 pCi/t.
Tritium activity (treated water only) ranged from 2h0 to 700 pCi/t.
c 2
(d)
Well Water Monthly grab samples of three sampling locations showed con-centrations ranging from 1 pC1/1 to 9 pCi/t. The gross beta concentrations at location SP van statistically higher than the other two locations at p <0.05, however, when SP is com-pared with previous years' results, no significant difference is identified.
(e)
Milk Strontium-90 and Cesium-137 vere the only radionuclides de-tectable in milk smnples collected during the year.
Concen-trations of these two isotopes are consistent with concurrent background. Although one milk location was statistically hi6her than the others at p <0.05 for Sr-90, the mean level in milk for that location was not higher than the mean for all other locations.
In this case, the paired t test used for the statistical evaluation was influenced primarily by the tightness of the distribution of values about the mean at this location and a similar distribution about the lover mean observed at the control location. The Chinese nuclear detonation # 25 in Inte-1980 is considered to be the cause of the statistical fluctuations observed in this instance.
(f)
Sediment and Crops P.adioactivity in lake bottom sediment and crop samples col-1ected throughout the year is consistent with previous years' data.
(g)
Gamma Dose Thermoluminescent dosimeters are used to.7cnitor the levels of gamma radiation in te vicinity of the site. Two time intervals indicated significant differences in radiation levels between indicator and control locations. The dif-ferences occurred in January and June,1981, but were caused by background stations which indicated dose rates lower than shielded controls. Therefore, it appears that variation in background levels, rather than enhancement of indicator loca-tion radiation levels, were responsible for the sample popula-tion differences.
3.
Sampling Summary For each media sampled, Table A-3 lists the sampling locations and the total number of samples collected. A listing of the highest, lowest and average concentrations for the sampling lucation with the highest average concentration is presented in Table A h.
3 h.
Environmental Dose Estimates Leve'.s of radioactive materials in environmental media do not indicate the likelihood of public exposure in excess of 5% of those that would result from continuous exposure to the concen-tration values listed in Appendix B, Table II, 10CFF.20.
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2 Analysis and Lower Limit All All Non rout ine Medium or Total Number of of Indicator Location With Highest Control Reported Pa t hway_Sa mp l ed Analyses Performed Detectionfal Loca11ons Annual Mean Locations Mea su remen t s( c )
Uni t of Measurement LLD Mean(b)
Name Mean(b)
Mean (b)
Range (b)
Distance & Direction Range (b)
Range (b)
Sediment Gross Beta 8
1.0 4.3 (4/6) i Mi N of Disch 8.0 (1/2) 2 (1/2)
None (pCi/g Dry)
(2-8)
(8-0)
(2.0-2.0)
Sr-89 8
0.025
<LLD
<LLD None S r-90 8
0.005(f)
.007 (1/6)
) Mi N of Disch.007 (1/6) 0.07 (1/2)
None
(.007.007)
(.001.007)
(0.07-0.07)
Cs-137 8
0.08
.09 (1/6)
Plant Discha rge.009 (1/2)
<LLD None (0.09-0.09)
(0.09-0.09)
Other Gamma 8
0.1 (LLD
<LLD None 1
(a) Nominal lower limit of detection (LLD) as defined in HASL-300 (Rev 8/73), Pages D-08-01, 02 and 03.
(b)Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated I
in pa rentheses.
(c)Nonroutine reported measurements are defined in the Palisades Technical Specifications, Section 6.9.3.2.
(d)lncludes transit dose which averages approximately 6.4 mR per round trip.
(e)See Paragraph 2b.
(f)A few samples had LLD 0.005 due to low chemical yield, eiO381-0322a-43-155
TABLE A-2 _
Sampling Locations Palisades Nuclear Plant Sample 8
b t
E Y
Y Y
3 3
8 ut ad d
G a
u Station Code Location 2$
E d
E U
t$
d 1
ST Palisades Nuclear Plant X
X X
X X
X 2
TH Tower Hill Farms X
X X
X RR 3, Coloma, Michigan 5 Miles SSE 3
GM Glenn Miller X
X X
X X
RR 1, Covert, Michigan 5 Miles SE 4
JS Jerry Sarno X
X X
X RR 1, Covert, Michigan 3-1/2 Miles ESE Paul Rude X
X X
X 5
PR RR 1,, Covert, Michigan 3 Miles E 6
RB Richard Bus X
X X
X RR 3, South Haven, MI h-3/h Miles NE 7
SD Sherman Dairy X
X X
South Haven, Michigan 7-1/2 Miles NNE TA SDF Sherman Dairy Farm X
South Haven, Michigan 8 Miles NNE 8
SP brate Park, 1 Mile N X
X X
X 9
TP Cavert Township Park X
X X
X 1-1/2 Miles S 10 GR Grand Rapids, Michigan X
X X
55 Miles NNE 11 KZ Kalamazoo, Michigan X
X X
35 Miles E 12 DG Dowagiac, Michigan X
X X
30 Miles SSE SH South Haven, Michigan X
X AK NdiYarr X
RR 2, Covert, Michigan 5-1/2 Miles ESE t
T TABLE A-3 PALISADES NUCLEAR PLANT JANUARY 1,1981 TO DECH4BER 31,1981 SA!4PLING AND ANALYSIS SUte!ARY Number of Samples Frequency of Medium Description Location Collected Type of Analysis Analysis Air Continuous at All 616 Gross Beta, I-131 Weekly Approx 1 CFM Lake 1 Gallon Intake, Discharge 2h Gross Beta, Gross Alpha, Tritium Monthly Water Composite Drinking 1 Gallon South Haven 2h Gross Beta, Tritium Monthly Water Composite Well 1 Gallon Site, TP, SP 36 Gross Beta Monthly Water Grab Milk 1 Gallon SDF, GM, AK 3h I-131, Sr-89 and Sr -90, Cs-137 Monthly Grab Isotopic Gamma Continuous All 262 TLD Doce Monthly Dose 85 Quarterly Cropa Grab JS, PR, RB 17 Gross Beta, Isotopic, When SR-89 and SR-90, CS-137 Available Sediment Grab Discharge, N & S 8
Gross Beta, Isotopic, When Site Boundary Sr-89 and Sr-90, CS-137 Available 5 Miles North
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TABLE A-4 Hich. Low and Average ConctLntrations for Hiatley Averace Samplina location Pa l i sades Nuclea r Plant Janua ry 1, 1980 to Decembe r 31, 1980 Medlum Type or AnalysIsf11 Location Hiqh Low Ave ra ae t 6 )
8 3
Air Gross Beta CR (55 Mi NNE)
.61 pCi/m
.04 pCi/m' 24.4 pCi/m 8 131 All
<LLD
<LLD
<LLD La ke Wa te r Cross Beta Plant Discha rge
$ pCi/l 2 pCi/l 3.5 pCl/l Cross Alpha Plant Intake 2.0 pCi/l
<LLD 1.2 pCi/I(2)
Tritium Plant Intake 66,000 pCi/I 220 pCl/l 10,650 pCi/l Drinking Water Cross Beta South Haven Raw 5 pCi/l
<LLD 3.1 pCi/l T ri t i um( 5 )
South Haven Treated 700 pCi/l
<LLD 382 pCi/l Well Water Cross Beta State Pa rk 9 pCi/l
<LLD 4.7 pCi/l Milk l-131 All
<LLD
<LLD
<LLD S r-89 All
<LLD
<LLD
<LLD Sr-90 GM ($ Mi SE) 18 pCi/l 2 pCi/l 7.7 pCi/l Cs-137 CM (5 Mi SE) 12 pCi/l
<1 pCi/l(8) 7.1 pCi/l Other Camma All
<LLD
<LLD
<LLD Camma Dose (7)
TLD (Monthly)
CM (5 Mi SE) 33.5 mR/Mo 3.9 mR/Mo 12.7 mR/Mo TLD (Qua rterly)
PR ( 3 Mi E) 27.6 mR/Qtr 14.6 mR/Qtr 17.7 mR/Qtr Crops (3)
Cross Beta JS ( 3.5 Mi ESE) 2.7 pCi/g 1.0 pCi/g 1.8 pCi/g Sr-89 All
<LLD
<LLD
<LLD Sr-90 PR ( 3 Mi E) 0.053 pCi/g
<LLD 0.08 pCi/g Cs-137 PR (3 Mi E) 0.08 pCi/g
<LLD 0.036 pCi/g Other Gamma AlI
<LLD
<LLD
<LLD Sediment (4)
Gross Beta
} Mi N of Discharge 8 pCi/g
<LLD 8 pCi/g S r-89 All
<LLD
<LLD
<LLD S r-90
) Mi N of Discharge 0.007 pCi/g
<LLD 0.007 pCi/g Cs-137 E ( Plaret Discha rge) 0.09 pCi/g
<LLD.
0.08 pCl/g Other Gamma All
<LLD
<LL D
<LLD (1) Minimum detectable level (MPt, = rise, g ross beta' O.01 pCl/m, 1-131 0.02 pCi/m ; water, g ross beta 1.0 pCi/ s, g ross a lpha 1.0 s
8 pCi/1, H-3 100 pCi/1; milk, 5-1J1 0.5 pCi/l, Sr-89 5.0 pCi/l, gamma isotopic 1.0 pCi/1; crops and sediment, gross beta 1.0 pCl/g, Sr-89 0.025 pCi/g, Sr-90 0.0v r' s /g, gamma isotopic 0.05 pCi/g; some samples may have higher MDLs due to sample size, shipping delays or statistical phenomen'.
(2) Numerous samples contained less than LLD; the re f o re, this average may not be meaningful.
( 3] Samples collected monthly in season.
(4)Two samples per location.
(5) Tritium analysis performed on South Haven treated only.
(6)Only samples greater than LLD included in average.
(7)lncludes transit dose which averages approximately 6.4 mR/round trip.
(8) Lower sensitivity due to low chemical yield.
miO381-0322b-43-155
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