ML20004D123
| ML20004D123 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 12/30/1980 |
| From: | CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| Shared Package | |
| ML20004D116 | List: |
| References | |
| NUDOCS 8106080419 | |
| Download: ML20004D123 (30) | |
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i BIG ROCK POINT NUCLEAF ?OWER PLANT ENVIRONMENTAL MONITORING REPORT JANUARY - DECEGER 1980 i
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This report provides information relating to environ = ental monitoring at the Big Rock Point Plant during the period of Janua:/ through December 1980 as required by Technical Specification 6.9.3.b.
II.
ENVIRONME'!TAL MONITORING A.
Samuling Summary For each medium sampled, Table ILAl contains the numoer of sampling locations, total number of samples collected and the number of locations at which levels were found to be significantly above local concurrent background. A listing of the highest, lowest and annual average concen-tration for the sampling point with the highest average concentration is presented in Table II-A2.
B.
Environmental Dose Estimates Levels of radioactive materials in environmental media do not indicate the likelihood of public intake in excess of 1% of those that could result from continuous annual erposure to the concentration values listed in Appendix B, Table II, Part 20.
C.
Variation of Environmental Concentrations with Time Statistical analyses of the data for significance at P <0.05 show that there has teen no detectable increase in radioactivity levels of environ-mental mddia that can be attributed to plant effluents.
D.
Discussion and Interuretation of Results 1.
Air Samples: Nc significant increase above concurrent background was observed at thee air particulate sa=pling locations.
No iodine-131 activity on the charcoal cartridges was observed above the minimum detectable level. This is consistent with expected results based on actual plant effluents and site meteorolog7 2.
Lake Water: Monthly composite sa ples of the plant intake and discharge indicate a statistically significant difference at p<0.05 Gross Beta concentrations ranged from 2 to h6 pCi/1 and tritium concentrations ranged frem <100 to 650 pCi/1. A comparison of calculated discharge concentrations based on effluent analyses and net measured discharge concentrations is presented in Table II-A3 The Charlevoix drinking water sample does not indicate the presence of other than natural background radioactivity.
3 Well Water: Well water samples do not indicate the presence of other than natural background radioactivity.
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Milh: Strontium-90 and Cesian-137 vere the only radionuclides
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detectable in milk samples collected during the period. Con-centrations of these two isotopes are consistent with concurrent background.
5 Aquatic Biota: Samples of periphyton, algae, crayfish and fish are collected semiannually, when available. Periphyton and crayfish samples collected near the discharge appear to contain higher concentrations' of certain radionuclides (Cs-137, Co-60 and Mn-Sk) than samples collected at reste locations. This localized increase has also been observed and reported by the Great Lakes Radioecology Group at Argonne National Laboratory.
It should be noted, however, that current levels are consistent with levels observed over the last eight or nine years.
6.
Gar.:ma Dose: Both thernoluninescent dosimeters and film are used to monitor the levels of ge.t::a radiation in the vicinity of the site. There were no significant differences in levels observed at the various saneling locations.
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N' N TABLE II-Al BIG ROCK POINT NUCLEAR POWER PLANT RADIOLOGICAL ENVIRONMENTAL MONITORING SAMPLING AND ANALYSIS
SUMMARY
JANUARY 1, 1980 TO DECEMBER 31, 1980
- OF
- OF NUMBER OF LOCATIONS SAMPLING SAMPLES SIGNIFICANTLY ABOVE MEDIUM DESCRIPTION TYPE OF ANALYSIS FREQUENCY LOCATIONS COLLECTED CONCURRENT BACKGROUND Air Continuous Gross Beta, I-131 Weekly 7
363 None
@ approx f
Icm Lake Composite Gross Beta, H-3 Monthly 3
36 None Water Well Grab Gross Beta Monthly 1
12 None s
Water Milk Grab I-131, Sr-89/90, Monthly b
L8 None Gamma Isotopic (Cs-13T)
. Gamma Continuous TLD Monthly 12 1hh None Done Quarterly 12 48 None Film Monthly 12 lbh None Aquatic Grab Gross Beta, Semiannually 5
h0 None Biota Sr-89/90, GarJQa Isotopic 1
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TABLE II-A2 BIG ROCK POINT NUCLEAR POWER PLANT HIGH, LOW AND AVERAGE CONCENTRATION FOR THE HIGHEST AVERAGE SAMPLING LOCATION JANUARY 1,1980 TO DECEMBER 31, 1980 LOWER LIMIT "
MEDIA TYPE OF ANALYSIS OF DETECTION LOCATION HIGH LOW AVERAGE Air Gross Beta 0.01 BC (12.0 miles E) 11.0 1.0 3.9
<LLD (pCi/m )
I-131 0.02 All 3
Lake Water Gross Beta 1.0 Discharge h8.0 2.0 10.h (pCi/t)
H-3 100.0 Discharge 650.0 120.0 288.0 Well Water Gross Beta 1.0 Site 24.0 2.0 h.2 (pci/t)
<LLD Milk I-131 0.5 All (pCi/1)
Cs-137 1.0 GS (2.3 miles SE) 70 2.0 4.h
<LLD Sr-89 5.0 All Sr-90 1.0 TD (6.5 miles SSE) 8.0 1.0 5.4 Gamma Doce #
TLD (Monthly)
E (0 9 miles SSK) 8.6 4.8 6.6 (mH/ month)
Sunan Take (h.0 miles SSE) h.0 0
0.5 Film (Monthly)
(mR/ quarter)
TLD (Quarterly)
E (0.9 miles SSE) 21.3 12.7 15.6 d) (pCi/g Wet)
Periphyton All Identified y Discharge 8.9 3.6 6.3 Biota A16ae Gross Beta 1.0 Nine Mile Pt ('3 0 miles E) 2.7 2.2 2.5 Fish Gross Beta 1.0 Nine Mile Pt (3.0 miles E) 3.1 1.6 2.4 Crayfish All Identified y Discharge 3.2 2.1 2.7 Nominal lower limit of detection (LLD) defined in HASL-300, pgs. D-08-01, 02 and 03.
a.
b.
Base on detectable measurements only, Includes background and transportation done.
c.
d.
Two samples per location.
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o TABLE II-A3 BIG BOCK POINT NUCLEAR POWER PLANT Cc=parison of Measured and Effluent Concentrations OROSS BETA CONCINTRATION (pCi/f.)
Sampling Period Measured Calculated Average" Discharge Intake Net Discharge January 11 5
6 20 Fe'uruary 19
<1 19 h8 March 48 10 38 8
1 April T
T May 2
<1
<2 1
June 6
3 3
July 3
4 2
6 August 5
5 September 2
8 2
October 5-6 5
November 10 5
5 h8 December 7
3 4
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.s TRITIUM COUCE"'RATI3N (pCi/t)
January 230 160 70 8h February 180 130 50 182 March 500 220 280 88 April 190
<100
<oo 3
May 120 190
<1 June
<100 120 July 160 1ho 20 h8 August 270 240 30 99 3
September
<100
<100 October 220
<100
<120 5
November 360 300 60 398 December 650 520 130 1367 UOTE:
- Calculated from total quantities released (B&y) determined by release tank samples divided by total dilution flov during the interval.
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'~Ci.hW r-U connes omose: 212 weet MWeen Avenue, Jukson, MWeen 49201 * (51U 784-0550 February 27, 1981 Mr Ja=es G Keppler Office of Inspection and Enforcement Region III U S Nuclear Regulatory Co=:dssion 799 Roosevelt Road Glen Ellyn, IL 60137,
DOCKET 50-155 - LICEISE DPR BIG,RCCK POIIIT PLAliT - SE4IANNUAL RADIOACTIVE IFFLUEIT R N ASE REPORT JULY - DECEGER Jc80 I-Attached please find the Radioactive Effluent Release Report for the Big Rock Point Plant for the period of July through Dece:ber 1980. The attached rapqrt is sub=itted in accordance with 10 CFR 50.36a(2) and Technical Specification 6.9 3 l
Gregory C Withrov (Signed)
Gregory C Withrov Senior Licensing Engineer CC Director, Office of Iiuclear Reacter Regulation Director, Office of Inspection and Enforce =ent IIRC Resident Inspector - Big Rock Point pages l
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BIG ROCK POINT NUCLEAR POWER FLANT t
l RADICACTTE EmHENT RELEASE JULY.- DECEMBER 1980
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