ML19249C749
| ML19249C749 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 06/30/1979 |
| From: | Maine Yankee |
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| Shared Package | |
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| References | |
| NUDOCS 7909180442 | |
| Download: ML19249C749 (27) | |
Text
.
Environmental Surveillance Report OPERATING LICENSE NO. DPR-36 DOCKET NO. 50-309 i
I No.12 JULY 1,1978 through JUNE 30,1979 w
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y MAINE YANKEE ATOMIC POWER COMPANY
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MAINE YANKEE ATOMIC POWER COMPANY ENVIRONMENTAL SURVEILLANCE REPORT REPORT NO. 12 OPERATING LICENSE NO. DPR-36 DOCKET No. 50-309 AEPORT PERIOD:
1 July 1978 - 30 June 1979 Maine Yankee Atomic Power Company Edison Drive Augusta, Maine 04336 September 1979 q
v V a s. ' t ' >.
TABLE OF CONTENTS Introduction.
1 Effluent limitations.
2 5
Impingement monitoring.
15 Monitoring estuary water temperature.
G
~3.. rn v is ' A i: '- i. 3
Introduction This is the twelf th report, dating from September 15, 1972, on the status and results of the environmental surveillance and study programs related to the operation of the Maine Yankee Nuclear Generating Station, Wiscasset, Maine. The study programs in this report are designed to determine the major effects of plant operation on the ecology of the Montsweag Bay estuarine system. This report is submitted to the United States Nuclear Regulatory Commission (NRC),
Directorate of Licensing, in accordance with Section 1.0 of Ap-pendix B - Technical Specifications to Operating License No. DPR-36, Docket No. 50-309.
Results of the environmental radiological sur-veillance program are reported separately at the end of each calendar year.
In January, 1979 the NRC determined that, based on the study results from 1969 - 1977, the operation of Maine Yankee had no demon-strable adverse impact to the aquatic environment and the scope of the tech spec studies were reduced. This report addresses the re-maining ' environmental' technical specifications - the LCO's (1.1 - 1.3), fish impingement (1.4), and water temperature (1.6) monitoring. Also, reports are submitted annually now (report year ending in June) instead of semiannually.
Maine Yankee was shut down for six weeks during the summer of 1978 (14 July to 27 August) for refueling, and from 15 March to 5 June 1979 to comply with the NRC shutdown order concerning the ability of certain plant piping systems to meet seismic design criteria. Extensive reanalyses confirmed that the piping systems do indeed satisfy the seismic design criteria.
1 bb'$ 5Nd-
EFFLUENT LIMITATIONS Plant Cooling Water Thermal Limits Specification 1.1 limits the effluent temperature measured at the diffuser forebay to a daily average of 108 F (42.2 C) and a maximum of 116 F (46.7 C).
It also limits the cooling water temper-ature I ae (AT) across the condenser to a daily average of 37 F f
(20.6 C) and a maximum of 46 F (25.6 C).
The daily maximum and maximum daily average discharge temperatures and AT's are shown by month in Table 1.
Table 1 shows that the discharge temperature and AT limitations were not exceeded during this period.
Control of Montsweag Bav Water Temperature Specification 1.2 limits the surface temperature within the mixing zone to a daily average of 77 F (25 C) and a maximum of 820F (27.8 C) for not more than one hour during June, July and August and during the remaining months of the year the maximum temperature is limited to 77 F.
This limitation is included as a Technical Specification solely as a condition of the Federal Water Pollution Control Act of 1972, as amended. These limitations were not exceeded during this reporting period.
Plant Cooling Water Systems Chemical Discharge Limits Specification 1.3 simply requires that all chemical releases from the plant to be diluted by the plant cooling uater effluent so as to be non-toxic to marine organisms in the estuary. The dilution ratio of cooling water discharge to the chemical release c4 s->..
2 N W h3
discharge is on the order of 400:1. Thus chemical releases discharged into the cooling wat.er effluent are highly diluted before entering the marine environment.
<, L)' t h' $'h) s>
3
Table 1.
Maine Yankee (hourly) maximum and maximum daily average discharge temperature ( F) and AT ( F)
January 1978 - June 1979.
Discharge Temoerature F AT, Ov 1978 Max.
Max Daily Avg.
Max.
Max Daily Avg.
January 68.1 65.8 34.0
- 31.5 February 65.5 62.1 34.7 31.5 March 69.1 66.2 39.1 30.3 April 76.7 73.4 32.9 31.9 May 92.8 87.3 31.5 30.7 June 95.0 86.5 32.4 29.2 July 100.3 93.2 31.8 27.0 August 80.8 16.2 September 90.4 80.0 32.2 24.1 October 87.2 83.2 33.3 31.7 November 89.6 81.6 36.9 32.4 December 74.5 71.4 40.8 35.0 1979 January 74.3 70.8 43.2 34.0 February 71.4 66.6 41.4 34.0 March 74.8 71.3 39.1 36.9 April Cold Shutdown May Cold Shutdown June 97.3 93.5 31.7 30.6 4
.O,0 * ; /~ '*t <
I IMPINGEMENT MONITORING Introduction The objective of this continuing study is to determine the numbers of fishes and macroinvertebrates impinged on Maine Yankee's circulating water system traveling screens in order to assess the effects of impingement on the affected aquatic populations of Montsweag Bay. This study began in November 1972.
Cooling water for the plant is drawn from Back River through an intake structure that is parallel to the shoreline at a rate 3
of 27 m /s. A U-shaped (cross-section) channel, 30-70 m wide, extends 180 m from the intake structure to the main channel of Montsweag Bay.
The nearshore zone contiguous to the channel is extremely shallow at low tide.
Intake velocities range from 0.2 to 0.8 m/s, depending on tidal stage, and are typically > 0.6 m/s near the bottom.
Each of the four 1-cm mesh traveling screens are rotated ver-tically past a jet water spray (ca. 90 psi) which dislodges debris and impinged organisms into a sluiceway. A prewash system was installed in June 1977 to reduce the stress associated with the screenwash spray. Six nozzles per traveling screen emit a wide-pattern spray (ca. 38 psi) that removes fishes from the screens before they are exposed to screenwash jets. The screenwash water containing debris and organisms empties into a shallow tank (3.6 x 1.2 x 0.7 m), where samples are collected. All animals, except for those collected during sampling, are returned to the bay via a M> N *qz
+>.
5
sluiceway. Under normal operating conditions the traveling screens are washed usually at two-hour intervals to minimize the duration of impingement, or whenever a head across the screens exceeds two inches of water. The screens are washed continuously, however, when large amounts of debris accumulate. Massive amounts of fletsam frequently occur in the bay during the fall under conditions of extreme high tides and strong winds.
Materials and Methods In accordance with Specification 1.4, estimates of the type, size, and quantity of fish, hard-shelled crabs and lobsters were made daily by plant operators whenever the circulating water pumps were operating.
Impingement samples were collected weekly over a 24-hour period in order to minimize the effects of light and tide.
All four traveling screens were rotated and cleaned to establish a starting time for the sampling period, which usually began at 0800 EST.
The screenwash was sieved through a 0.6 cm woven mesh bag and all fish and macroinvertebrates collected at the end of the 24-hour period were identified, measured and the total weight of each tart recorded. A random subsample is taken when necessary to expedite processing. The number of operating circulating water pumps and their valve positions tcere recorded for each sample.
6 43, tr i GJ t s.e - > - c3
Results and Discussion The estimated number of fish and hard-shelled crabs impinged each day and the absolute totals for the weekly 24-hour impingement samples for July 1978 through June 1979 are shown in Table 2.
No lobsters have been impinged on the traveling screens since the plant began operation.
The numbers of the principal fishes, two macroinvertebrates, and all fish species combined, impinged in a 24-hour period are shown by sampling date in Table 3.
Maine Yankee was thut down for six weeks during the summer of 1978 (14 July to 27 August) for refueling, and from 15 March to 5 June 1979 to comply with the NRC-ordered shutdown because of the possibility that certain piping systems may not meet seismic design criteria (reanalysis proved this to be false).
Impingement samples were also not collected during the first three weeks of November because of heavy trash loading on the screens.
In 55, 24-hour impingement samples, 5787 fish (total weight 152 kg (336 lb)) of 22 species or species groups were impinged during 1978 and the first half of 1979. Four species -- rainbow smelt (19%), smooth flounder (14%), alewife (11%), and winter flounder (9%) -- and the stickleback group (30%)
and the sculpins (7%) collectively made up 90% of the total catch.
The four species listed comprised about 60% of the biomass impinged from Januc y 1978 through June 1979.
Total fish impingement rates were highest during January due to the abundance of smooth flounder and rainbow smelt in 1978 and sticklebacks and smooth flounder in 1979 (Tables 3-5).
Table 4 is included primarily to show the variability of the monthly sample means.
n re za c> u 7
For all fish species combined, monthly mean impingement rates ranged from 14.4 fish / hour in January to 0.7 fish / hour in July (Table 5).
Monthly mean impingement rates of the principal fishes caught were generally < 1 fish / hour from February to December.
As shown in Table 5, mean fish impingement rates were consi-derabl, less than 1977 impingement rates. Length-frequency dis-tributions of fishes impinged remain unchanged from previous years' data.
Impingement of rock crabs (Cancer irroratus) and green crabs (Carcinus mcenas) were lowest during February - March and highest in May (Table 3).
The green crab comprised 84% of the total crab catch (761) in the 24-hour samples.
Impingement rates during 1978 were the lowest measured since the monitoring began in late 1972. The low number of fishes im-pinged at the intake screens depicts the overall decline in the abundance of fish populations in the estuary as evidenced in the estuarine fisheries studies.
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Table 3.
Imptugement (number individual /24 hours) of all fishes, principal fish species, and crabs at. Maine Yankee, January 1978 - June 1979.
e EENFI MAINE YANKEE FISH IMPINGEMENT TOTAL SMOOTH WINTER GREEN ROCK FISH STICKLE FLOUNDCR FLOUNDER SMELT ALEWIFE CRAS CRAB DATE 1/ 4/1978 184 20.
35.
50.
15.
O.
29 3.
1/10/5978 998.
10 282.
15.
630.
O.
55.
5.
1/18/I978 136.
O.
44 17.
55.
O.
17 1.
1/24 /19 7P.
20.
O.
1.
2.
15.
O.
8.
2 2/ 1/1978 19.
10.
1 1
3 O.
O.
2.
n 2/ 8/1978 57.
O.
8 4
32.
O.
O.
1 2/15/1978 24 11.
1.
1.
3.
O.
O.
O.
2/21/1978 18.
11.
1 1.
2.
O.
3.
D.
3/ 1/1978 42.
11.
2.
3 22 O.
O.
1 3/ 7/1978 23.
O.
3.
2.
13.
O.
O.
O.
3/15/1978 59.
26.
2.
O.
24 O.
O.
O.
3/22/1978 15.
O.
3.
O.
6.
D.
O.
O.
3/29/1978 24.
O.
7.
1 11 O.
O.
O.
4/ 5/1978 11.
O.
4 1.
O.
O.
O.
O.
4/11/1978 38.
15.
O.
2.
O.
16 O.
O.
4/19/1978 36.
9 12 6.
6.
O.
O.
2 4/26/1978 69.
14.
2.
4 4
39 4
2.
5/ 3/1978 119 O.
3.
76.
14 1.
152.
32.
-5/10/1978 115.
O.
2.
73 10.
O.
76.
8.
5/17/1978 22.
13 O.
3.
O.
O.
6 1.
o 5/24/1978 21.
O.
9.
4 O.
1.
20.
4 5/30/1978 51.
30.
O.
3.
O.
5.
5.
1 6/ 7/1978 21.
13.
O.
5.
O.
2.
22.
3.
6/14/1978 32.
5.
O.
2.
O.
7.
34 4,
6/21/1978 22.
O.
O.
12.
3.
O.
7.
2.
6/28/1978 29 12.
1 1.
O.
O.
3.
6.
7/ 5/1978 22.
5.
O.
O.
O.
6.
25.
O.
7/12/1978 13.
4.
O.
1.
O.
3.
3.
3.
9/13/1978 23.
O.
3.
9 O.
1.
5.
1.
9/20/1978 118.
O.
14 17 O.
82.
10.
2.
9/27/1978 139 O.
20.
3 3.
102.
3.
1.
10/ 3/1978 120.
19 25 22.
26.
7.
2.
2.
10/11/1978
- 149, 11.
22.
43.
7.
41 14 5.
10/18/1978 70.
13.
3.
9.
12.
31.
21 3.
10/25/1978 52.
O.
2.
1.
9.
29 1.
2.
11/ 1/1978-----------------------------NO C O L L E C T I O N P O S S I B L E - --- - ------------------------
11/ 8/1978-
NO C O L L E C T I O N P O S S I B L E ----- ----- ------------------
11/14/1978-----------------------------NO C O L L E C T I O N P O S S I B L E - --- ------- ------------- -----
11/21/1978
- 100, 14.
1 3.
O.
69 O.
O.
11/29/1978 85 11 O.
9.
18.
23.
O.
O.
12/ 6/1978 122.
9 21.
7 33.
.' 7 O.
O.
LO 12/13/1978 60.
O.
5.
16.
16.
20.
11 3.
- ?
12/20/1978 76.
25.
5.
3.
1.
28.
O.
O.
12/27/1978 269.
28.
72.
14.
26.
O.
6.
2.
- 1. 4 e
$N
Table 3.
(continued)
~ --
E E tJ F I M4 I rlii y A tJ K F E FISH I M P i rJ G E M F rii TOTAL S fl00 i ll W i tJ T C li GREEN ROCK DATE FISH STICKLC F L O UtJ D E R
.l L O U ll D E H SMELT ALEWIFE CRAD CRAB 1/ T/1979 432.
3SS.
24 4
O.
O.
O.
D.
1/10/1979 478.
T15.
72.
2.
9 O.
O.
D.
1/17/1979 730 535 49 O.
26.
O.
8.
2.
1/24/1979 116 O.
6.
4.
2t.
O.
O.
O.
1 '1/1979 27.
O.
5.
2.
8.
O.
O.
3.
2/ //1979 11'.
4 1.
O.
1.
O.
O.
O.
l.
2/14/1979 53.
24.
9 3.
O.
O.
O.
O.
2/21/1970 76 12.
O.
2.
7.
O.
D.
O.
7/28/1970 42.
13 5.
5 O.
O.
O.
O.
3/ 7/1979 64 O.
O.
10.
5.
33.
O.
(J.
6.
3/14/1979 46.
23.
15 1.
O.
O.
O.
6/13/1979 56.
O.
R.
25.
O.
8.
19 3.
~
6/20/1979 75.
5.
2.
20.
D.
32.
52.
6.
6/27/1979
$8.
11.
6.
16.
O.
9 15.
5.
T Y
9 h*
4b<
-Y-t+
Table 4 11asic statistics for impingement (aumber individuals /24 hours) of all fishes combined, principal fish species, and crabs, by month, January 1978
. lune 1979.
- ^
EENFI MAINE YANKEE FISH IMPINGEMENT TOTAL SMOOTH WINTER GREEN ROCK g,
OATE FISH STICKLE FLOUNDER FLOUNDER SMELT ALEWIFE CRAS CRAB
SUMMARY
FOR 1,
1978 BASED ON 4 SAMPLES SUM 1338 30 362 84 715 O.
109 12 0w MEAN 334.5 7.5 90.5 21.6 178.5 0.
27.1 3.5 S.D.
447.7 9.6 129.0 20.4 301.4 0.
20.4 1.6
SUMMARY
FOR 2,
1978 DASED ON 4 SAMPLES 7
SUM
'18 32 11, 7.
40.
O.
3.
3 FIJ MEAN 29.$
8.5 2.8 1.8 10.0 0.
0.8 0.8 S.D.
18.5 5.4 3.5 1.5 14.7 0.
1.5 1.0
SUMMARY
FOR 3,
1978 BASED ON 5 SAMPLES SUM 163.
37 17 6.
76.
O.
O.
1 0
MEAN 32.6 7.4 3.4 1.2 15.2 0.
O.
0.)
S.D.
17.8 11.4 2.1 1.3 7.6 0.
O.
0.4
SUMMARY
FOR 4,
1978 BASED ON 4 SAMPLES SUM 154..
38.
18, 13.
10.
55.
4 4
g MEAN 38.9 9.5 4.5
- 3. 3 2.5 13.8 1.0 1.0 S.D.
23.3 6.9 5.3 2.2 3.0 18.4 2.0 1.2 S LI M M A R Y FOR 5,
1978 BASED ON 5 SAMPLES C
SUN 328.
43.
14 159 24 7
259.
46}
0 MEAN 65.6 8.6 2.8 31.E 4.I 1.I 51.8 9
S.D.
48.5 13.2 3.7 39.0
- 6. 7 2.1 63.1 13.1
SUMMARY
FOR 4,
1978 BASED ON 4 SAMPLES SUM 104.
30.
1.
20.
3.
9.
66.
15.
O MEAN 26.0 7.5 0.3 5.0 0.8 2.3 16.5 3.8 S.D.
5.4 6.1 0.5 5.0 1.5 3.3 14.2 1.7
$UMMARY FOR 7,
1978 BASED ON 2 SAMPLES SUN 35 9
0.
1.
O.
9 28 3
MEAN 17.3 4.3 0.
- 0. 5 0.
4.5 14.5 1.5 O.
S.D.
6.4 0.7 D.
- 0. 7 0.
2.1 15.6 2.1
SUMMARY
FOR 9,
1978 BASED ON 3 SAMPLES SUM 280.
O.
37.
29 3.
185.
18.
4 MEAN 93.3 0.
12.3 9.7 1.0 61.7 6.0 1.1 O
S.D.
61 8 0.
8.6 7.0 1.7 53.5 3.6 0.6
SUMMARY
FOR 10, 1678 BASED ON 4 SAMPLES SUM 391.
43 52 80 54 108.
38.
12 b
MEAN 97.8 10.E 13.5 20.5 13.1 27.0 9.5 3.5 w
S.D.
44.7 7.9 12.2 20.6
- 8. 6 14.3 9.7 1.4 C
SUMPARY FOR 11, 1973 BASED ON 2 SAMPLES N
1 5
0 s 5
N5 4U5 03' 03' h'
S.D.
10.6 2.1
- 0. 7 4.2 12.7 32.5 0.
O.
't
SUMMARY
FOR 12, 1978 CASED ON 4 SAMPLES O'. :
sum 527.
62.
103.
40.
76.
75.
17.
5.
MEAN 131.8 15.5 25.8 10.0 19.0 18.8 4.3 1.3 S.D.
95.2 13.3 31.7 6.1 13.9 13.0 5.3 1.5 4
4
Table 4.
(continued)
EEfJFI M A l fJ E YAfJKEE FISH I M P I N G E 'iE fJ T TOTAL SMOOTH WINTER GREEN
. ROCK DATE FISH STICKLE FLOUNDER F L O Ufl D E R SMELT ALEWIFE CRAB CRAB y
SUMf1ARY FOR 1,
1970 BASED o fJ 5 S A !!P L E S SUM 1733.
1285.
156.
12.
69 O.
8.
5.
H E A fl 346.6 257.0 31.7 2.4 13.8 0
1.6 1.0 S.D.
281.2 254.7 29.0 1.7 11.7 0.
3.6 1.4
SUMMARY
FOR 2,
1979 8ASED o fi 4 SAMPLES SUN 132.
60.
15.
8.
8.
O.
C.
O.
MEAfJ 31.0 15.0 3.3 2.0 2.0 0.
O.
O.
S.D.
13.4 9.3 4.1 1.4 3.4 0.
D.
O.
SUMMARY
FOR 3,
1979 HASED Oft 2 S A f4P L E S SUM 110.
25 15.
11.
5.
33.
O.
6.
M E A ?J 55.0 11.5 7.5 5.5 2.5 16.5 O.
3.0 S.D.
12.7 16.3 10.6 6.4 3.5 23.3 0.
4.2
SUMMARY
FOR 6,
1979 BASED 0 :4 3 SAFPLES
-w S U '1
- 139, 16 16.
61.
O.
49.
86.
14.
MEArt 63.0 S.3 5.3 20.3 0.
16.3 28.7 4.7 S.D.
10.4 S.S 3.1 4.5 O.
13.6 20.3 1.5 e
Y s
e
Table 5.
Mean impingement rates (number of fish / hour) of the principal fishes encountered at Maine Yankee and all fishes combined.
Month Year Jan Feb Mar Apr May Jun Jul aug Sep Oct Nov Dec Total fish 1977 26.0 30.0 18.4 1.4 1.9 18.1 203.6 18.7 4.9 6.3 1978 13.9 1.?
1.4 1.6 2.7 1.1 0.7 3.9 4.1 3.8 5.5 1979 14.4 1.4 2.3 2.6 St)cklebacks 197; 18.6 16.7 7.0 0
0.2 0.2 0.2 0.7 0.7 0.4 1978 0.3 0.3 0.3 0.4 0.4 0.3 0.2 0
0.4 0.5 0.6 1979 10.7 0.6 0.5 0.2 Smooth flounder 1977 1.0 0.4 0.6 0
0.1 0.3 1.7 1.7 0.1 1.4 1978 3.8 0.1 0.1 0.2 0.1 0
0 0.5 0.5 0
1.1 1979 1.3 0
0.3 0.2 Y
Winter flounder 1977 0.6 0.3 1.3 0.3 0.2 0.6 1.8 3.4 0.2 0.5 1978 0.9 0.1 0.1 0.1 1.3 0.2 0
0.4 0.8 0.2 0.4 1979 0.1 0.1 0.2 0.8 Rainbow smelt 1977 5.2 11.6 7.4 0
0 0.1 1.3 2.7 1.1 1.4 1978 7.4 0.4 0.6 0.1 0.2 0
0 0
0.6 0.4 0.8 1979 0.6 0.1 1.0 0
Alewife 1977 0
0 0.1 0.1 0.6 15.1 194.8 7.2 1.6 0.7 1978 0
0 0
0.6 0.1 0.1 0.2 2.6 1.1 1.9 0.8 1979 0
0 0.7 0.7
- = Shutdown CO C;-
5'S
MONITORING ESTUARY WATER TEMPERATURE Continuous water temperature monitoring was conducted at two depths (1 foot below the water surface and - 20 feet MSL) at each of four locations within the Montsweag Bay-Sheepscot River system in accordance with Specification 1.6.
Materials and methods have been described in the Final Report and previous reports in this serics. Temperature monitoring locations are shown in Figure 1.
The daily ranges of water temperature recorded at the four locations are shown in Figures 2-5.
Recorded temperatures were all within the normal range of values.
In the upper portion of Montsweag Bay water temperatures (Figures 2, 3) were similar to last year except during late spring 1979 when surface temperatures were somewhat lower. This is because Maine Yankee was not operating (i.e. no thermal discharge) during that time in 1979. Temperature records at the southern entrance to Montsweag Bay (Figure 4) were similar to last year's records.
Surface temperatures in the upper Sheepscot River (Figure 5) during 1978 were slightly cooler than the previous year; su=mer-time (July, August) maximum surface temperatures were on the average 2.8 F (1.3 C) (S.D. - 2.0 F, N = 29) lower in 1978 compared to the same months one year earlier. The temperature record for 1979 at this station was similar to last year's.
- 15 u ts ir..s; I ij f g - g. -< n F...
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k MAINE YANKEE ATOMIC POWER CO. WISCASSET, MAINE i OAILY RANGE OF WATER T E MPERATURES l 1978 LOC ATION' DAILEY POINT 80 25 1' go 'O b i 'C 'F ll# 43ll igl 5 40 o l g1 i l 30-TEMPERATURE -lf t.(0.3m) BELOW WATER SURFACE 20 ll Ih1",,1,'I' l l5 "l l li is l f u 3 4,,L t-[ n [ij m i c,g*--DEFECTIVE so F 3 a I n i CABLE ii 50 1ll {lfJ r; f' s$2 llI@~%%gn#%$llII'll!li!ldj)h" 4o ~ ~ -2a"<-s.->~ta ~~a ~ t g a 30 MAINE YANKEE ATOMIC POWER CO. WISCASSET, MAINE DAILY RANGE OF WATER TEMPERATURES 1979 LOCATION:DAILEY POINT 8 2s 10-20 c:::D 60- ,p Jpili,,g4,i P91,) J = ,/$f$'"$g .o l TEMPER ATUR(-If t t0 3m) BflOW WATER SURF ACE 20 'p1[ y 60 ? $y,pw ,0 . d.)gjli%If s i lV,i ph 40 g ',,r. r i 1,.,, R., e..,,,, 6,.,,m..., s,,, m, 1%pu%gqllyg MAINE YANKEE ATOMIC POWER CO. WISCASSET, MAINE ! DAILY RANGE OF W ATER TEMPE R ATURES 1978 LOCATION-t.lTTLE OAK ISLAND 80 25 l \\ O wg'Y'I i{; g 1. b y/, y!)bl 5 I inullil! 1p 4yh;) 40 o l 3e TEMPERATURE -Ifl.(-0.5m) BELOW WATER SURFACE 70 - j 20 J q ' )'j! [Ij ) g (j); % d ! % A a g J f eo _ 7 ,d,4 'o i so- $N y.n& \\/'#h ce c d b 14NMaiisgleplia/g$lilldll18$ i ami 14% 4o ff oeERA1Use 4o1, i.e I > enow Mm, u uva MAINE YANKEE ATOMIC POWER CO. WISCASSET. MAINE DAILY RANGE OF WATER TEMPERATURES 1979 LOCATION:LITTLE OAK ISLAND so ts 20 ,3 60 p DiIl
- j
%qrg,1/,f,nA'- d 4 o i if.PEHA,URE -,ft ( 0 3 m) BELOW WATER SURFACE i^ to q f'3 ,a l so pilgpll0hjl L c i i y e %ggng,,,'%)hg,inipl(/p. e ' ~- d ~ i <....., Ue,. ,o.... i m e....~ s<. m < i L__ 30 ' MAINE YANKEE ATOMIC POWER CO WISCASSET, MAINE , DAILY RANGE OF WATER TEMPERATURES 1978 LOCATION HARRISON'S WISTPORTSOE 80 2s 70 l 20 lll jhi)!I'lllfi l l' is i l l4N)p,)!y6 C ,i r l m so y ..c, c,- (N,, g; u "#"~^'~~,,,q,l"""*"'"' ~ ' " " " "f * ~' "*" " "^' ' j'lMlNl0 2o l ij' y, itiL, ptog al co h ,0 ee-Oltythp%h,Fbq'U lj 9 s 4e ill A'( 0 k) ....? " " " ' " ' " ' ~ " " " " " ' " " " * " ^ " " ' ^ ' " ' 30 MAINE YANKEE ATOMIC POWER CO. WISCASSET, MAINE DAILY RANGE OF WATER TEMPERATURES 1979 LOCATl0N:Hs9RISON'S WESTPORT SHORE so 25 70 20 l l l $.( I ,3 ,,yp ; 'c) ) e ,)ll'l 5 l 40 i o 'lI([, (fy,g,g 30 TEMPERATURE -itt.( 0 3m) 0LLOW WATER SURFACE To 20 j i'j 60 00 f, 'fN, , lI l' ($ l ,e e ,Ifi
- f.
T-4 s P 40 l 'll g,bighaldOf " " " " ' ' " " ' " " " ' - ' ~ " " ' ' " " " " " se u , MAINE YANKEE ATOMIC POWER CO. WISCASSET, MAINE DAILY RANGE OF WATER T EM PER AT URES 1978 LOCAllON:CHANEY'S LANDING 80 25 O 20 .( l ' I, % wa,.,, f -15 60 i il I" !!8+818 -l0 E 50 5 gpih(( 40 dW SENSOR ,,k.,j.j 0 IHOPERATIVE 30 j TEMPERATURE -lft.(Q3mh BELOW WATER SURFACE
- ~
~ 20 I fl .g5 60 llgl lhl4 f i l / h i 4 8lill... -10 iii i r so i
- i
'I'* 5 __1 .,.,,,e=$l TEMPERATURE -20f t. (-6.im)DELOW MEAN SEA LEVEL ll11ll I (,,,.p _ CHART _,~.,,,,e# g m s. _o c l N i 9.:' MAINE YANKEE ATOMIC POWER CO. I WISCASSET, MAINE DAILY RANGE OF WATER TEMPERATURES l 1979 LOCdTION:CHAN5Y'S L*.NDING so 25 l 10 20 i t f so ,3
- C F
10 j [, L$d$t@ SO z g i 8s_..>.i.#)l; 40 i %,IN,,'itij .i., *d,,\\l # TEMPERATURE
- Ift (-0.3 n GLLOW WATER SURFACE TO 20 I
60 45 l C j i i b' 10 So 1I'I ' pidi' 1 s p n I'$1!!r"w pi; ...ulPiliglu.'I, "'"*'""'~"-"*"""*"5''"' i '