ML19262A077

Thermal Biological Monitoring Programs,Monthly Rept 74 for Aug 1979.

ML19262A077
Person / Time
Site:	Peach Bottom
Issue date:	08/31/1979
From:	PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML19262A076	List: ML19262A075 ML19262A077
References
NUDOCS 7910260308
Download: ML19262A077 (11)

Text

. .

PEACH BOTTOM ATOMIC POW 2R STAT 10ri MONTHLY REPORT NO. 74 for AUGUST 1979 THERMAL AND BIOLOGICAL MONITORING PROGRAMS FOR UNITS No. 2 AND 3 P ilII. A D E l.P il l A MI.ECTRIC COMPANY 1216 311 7 9102 603 c s,

MOFTHLY REPORT NO. 74 FOR AUGUST, 1979 THERKAL AND BIOLOGICAL MONITORING PROGRAMS PEACH BOTTOM ATOMIC POWER STATION UNITS NO. 2 & 3 The operation of PBAPS during the month of August 1979 was well within all applicable thermal criteria. The monthly mean delta T temperature (719 hourly readings) for the state line minus S2 location was 1.4*F higher than the mean of the preoperational experie me. The 5'F delta T above ambient criteria at the state line was not exceeded on an hourly basis due t plant operr. ion.

The daily river flows as measured at Holtwood Hydro-electric Station and the daily generation at PBAPS in thermal megawatts for the reporting period are presented in Table 1. Table 2 summarizes the hourly Conowingo Pond temperatures and Table 3 shows the impact hours above August confidence limits. Figure 1 shows the instrument and survey locations.

Figures 2, 3, 4, and 5 are isotherm plots, which include three (3) horizontal sections of boat surveys made during the August recording period. Boat survey information is tabulated in Table 4. Surveys for this period were started at the north end of Conowingo Pond. The delta T at the state line indicated on the isotherms is calculated by subtracting the Holtvood Dam temperature and the hourly Confidence Limit (applicable to the mid-survey time) from the state line temperature. This delta T can be interpreted as being caused by PBAPS since ambient hourly variations at the state line have been considered.

Although the isotherm plots do not cover the entire reporting period on a daily, hour by hour basis and cannot be used as a continuous indication of temperature variation, they do represent a fair treatment of typical plume characteristics. In addition, they may also be used as an empirical tool in estimating probable plume patterns in advance of certain natural and plant operating conditions.

1216 312

TABLE 1 tLul aCLD D AIL 1 FLCW5(CF S) AN L D4llV 1FERMAL ME LAW Allb- AUG 1979 De5 YEAR MONTH LA Y Hk_F L ud MW_ THERM i 79 8 1 15600 6225 2 79 6 2 45200 6310 3 79 6 3 lo100 6311 4 79 6 4 17000 6310 5 79 6 5 17400 6310 6 79 6 6 15700 0306 7 79 6 7 15000 6310 8 79 6 6 12700 6315 9 79 8 9 11000 6327 10 79 o 10 11500 6325 11 79 d 11 10100 6324 12 79 6 12 16100 6323 13 79 8 13 21700 6308 14 79 8 14 29900 6300 15 79 6 15 26600 6302 16 79 d 16 21400 6278 17 79 8 17 16300 6274 18 79 8 18 15000 6254 19 79 6 19 13200 0233 20 79 o 20 13600 o146 21 79 6 21 13100 6251 22 79 8 22 12100 6237 23 79 8 23 11700 6225 24 79 8 24 10900 6199 25 79 o 25 11400 4964 26 79 o 26 11300 5706 27 79 6 27 13700 6180 28 79 d 26 14000 6168 29 79 B 29 16300 6179 30 79 8 30 20300 6172 31 79 6 31 '8400

, 6165

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, TABLE 2

SUMMARY

OF HOUPLY CONOWINGO PDND WATER lEMPERATURES AUGUST,1979 VARIABLE N MEAN STANDARD MINIMUM MAXIMUM DEVIATION VALUE VALUE HW_ FLOW 744 1577 T. 42 4521.94 10100.00 29900.00 MW_ THERM 744 620?.55 249.47 4484.00 6327.00 S2 714 25.52 2.08 22.00 28.90 S2A 717 25.79 2.10 22.10 20.10 S25 719 25.52 2.08 22.00 28.90 S13 711 26.93 2.03 23.30 30.60 S13A 720 ?7.35 2.00 23.70 513S 31.20 720 26.97 2.04 23.30 30.60 S30 742 25.11 2.36 21.60 28.60 531 743 35.16 S32 735 2.31 30.80 38.50 31.22 2.04 27.50 34.50 D13_2 719 1.44 0.58 -0.40 2.70 02_2A 717 -0. ? 7 ' O.48 -?.30 1.90 D13_13A 711 -0.39 0 31 -1.70 0.60 D31_30 742 10.05 0.50 7.00 12.00 D32_30 735 6.13 0.96 4.40 8.30 D31_32 735 3.92 0.91 1.40 6.00 DS135,,S2S 719 1.44 0.58 -0.40 2.70 Definitions are as foilows:

N- Number of observations during the month S - 'Jhermograph Station (e.g., S2 is thermograph Station 2)

(TEMPERATURES ARE IN DEGREES CENTIGRADE)

D - Difference in temperature of the two stations (e.g. D13-2 is the temperature at Station 13 minus the temperature at Station 2, in degrees Centigrade)

HW Flow - Holtvood Flow in CFS MW Therm- Total Thermal Output of P3APS in Megawatts S13S - Thermograph S13A is substituted when S13 is missing or spurious readings are observed.

S2S - Thermograph S2A is substituted when S2 is missing or spurious readings are observed.

1216 314 9

% t TABLE 3

. S PhaPS IMPACT HOLks atutt ad0b51 CONFIDs NCE L IMI TS 5131 D13_2 Nh_FLCw M w_ T hE EM STATL5 C013_2 EX13_2 IPP13_2 DES W AR NONib LAT b004 521 1 24.S 27.3 2.e 1230C . PdE_0P 2.7 0.1 0 16 1 73 6 2d 1 3.2 0.2 0.36 2 73 6 26 / 24.4 27.6 3.4 12300 . PRE _0P 3.3 123J0 PRE _0P 3.0 0.3 0 54 3 73 6 26 3 24.4 27.7 .

27.5 3.0 12330 . P dE _0P 2.9 0.1 0 16 4 73 E 28 4 24.5 2.9 0.4 0.72 2d S 24.S 27.6 3.3 12 30C . PRE _0P 5 73 6 3.3 12300 PRE _0P 2.9 0.4 c.72 1 e 73 b 28 6 24.5 27.8 .

6 28 24.5 27.6 31 12300 . PdE_0P 2.7 0.4 0.72 7 73 7 2.8 0.3 0 54 73 6 28 6 24.5 27.6 3.1 12 3JC . PAE_0P 6

3.1 12300 . PRE _ GP 2.8 0.3 0.54  %

9 73 6 28 9 24.S 27.6 30 27.7 3.2 12300 . PRE _0P 3.1 0.1 0 18 10 73 6 28 24.5 28 12 24.7 28.0 3.3 12300 . PdE_0P 3.1 0.2 0.36 11 73 6 3.2 0.5 0 90  %

6 31 e 26.5 30 2 3.7 9000 . PRE _0P 12 73 3.0 0.5 0.90 2c.4 29.9 3.5 9t0C . PRE _CP 13 73 6 31 3 2.9 0.4 0.72 31 4 26.4 29.7 3.3 960C . PRE _0P 14 73 6 2.9 0.2 0.36 it 26.4 29.5 3.1 960C . PRE _0P IS 73 6 31 S 2.6 0.3 0 54 13 27.1 3C.0 2.9 9tJO . PRE _0P it 73 6 31 0.5 0.90 26.5 3C.0 3.5 9tJC . PRE _(P 3.0 17 73 6 31 14 9 There were no hourly exceptions in August 1979.

b Definitions:

S = Thermograph >

D = Delta T (C*)

Hw Flow = Holtwood Daily River Flcw (cf s)

MlJ 1herm = Daily Thermal Geaeration of PBAPS (megawatts) J CL = Confidence Limit (C*)

Fl = Exceptions (C*)

IMP = lmpact (F') s M

ty

. TABLE 4 BOAT SURVEY INFORMATION SURVEY DATE 8/8/79 8/17/79 8/22/79 8/28/79 TIME:

Survey Start (EST) 0 * ' ^, 1005 0800 0800 State Line (EST) 1030 1430 0910 0909 Survey Firish (EST) 1325 1630 1030 1020 HYDRAULIC DATA:

Pond Elevation Start (Ft.) 107.65 107.89 107.30 108.01 Pond Elevation Finish (Ft.) 108.40 107.40 107.30 108.00 Natural Flow (24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> ve., CFS) 11,000 18,000 10,400 13,000 Conowingo inflow (24 hea. ave. , CFS) 11,515 20,825 12,725 14,475 Conowingo Dam Draft (24 hr. ave., CFS) 14,075 24,600 14,300 15,875 PBAPS Power Output:

Unit 2: Thermal (MW) 3286 3274 3282 3283 Elactrical (MW) 1048 1052 1057 1055 Unit 3: Thermal (MW) 3029 3000 2955 2905 Electrical (MW) 926 927 914 891 METEOROLOGICAL DATA:

Time (EST) 0900 1000 0800 0800 Air Temperature (*F) 85 68 60 72 Relative Humidity (%) 84 70 95 96 Precipitation (24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> total, in) .06 0 .02 .02 Wind Speed (mph) 15 0-2 0-1 0-1 Cloud Over Scattered Sunny Sunny Full Location: 7 7 7 7 Wind Direction NW NW S W WATER TEMPERATURE (THERMOCRAPH)

Daily Mean: Sta. #2, *C, (*F) 28.1 (82.6) 22.9 (73.2) 22.6 (72.7) 25.1 (77.2)

Mid Survey: Sta. #2, *C, (*F) 28.1 (82.6) 23.5 (74.3) 22.5 (72.5) 24.6 (76.3)

WATER TEMPERATURE (SURVEY)

PBAPS Dischcrge *C, (F) 33.9 (93.0) 27.0 (80.6) 27.5 (81.5) 30.6 (87.1)

Intake *C, (F) 28.4 (83.1) 23.5 (74.3) 22.6 (72.7) 25.2 (77.4)

T *C, (*F) 5.5 ( 9.9) 3.5 ( 6.3) 4.9 ( 8.8) 5.4 ( 9.7)

Pond Surface Max. *C, (*F) 33.9 (93.0) 25.9 (78.6) 27.6 (81.7) 30.5 (86.9)

Min. *C, (*F) 27.9 (82.2) 22.1 (71.8) 21.9 (71 4) 24.4 (75.9)

Pond Bottom Max. *C, (*F) 33.7 (92.7) 27.5 (81.5) 27.0 (80.6) 30.8 (87.4)

Min. *C, (~F) 27.8 (83.0) 21.8 (71.2) 21.7 (71.1) 23.6 (74.5)

No. of C.W. Pumps Operating 6 6 6 6 No. of Cooling Towers Operating 4 4 4 4

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