ML19224D501

Chlorine Minimization Study,1978.

ML19224D501
Person / Time
Site:	Peach Bottom
Issue date:	07/06/1979
From:	PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML19224D499	List: ML19224D498 ML19224D501
References
NUDOCS 7907120368
Download: ML19224D501 (14)

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PHILADELPHIA ELECTRIC COMPANY PHILADELPHI A 3 PEACH BOTTOM ATOMIC POWER STATION

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UNIT NO. 2 & 3

DOCKET NOS.

50-277 & 50-278 i CHLORINE MINIMIZATION STUDY z

g JANUARY - DECEMBER, 1978 1

j; SUBMITTED TO THE UNITED STATES NUCLEAR REGULATORY COMMISSION PERSUANT TO FACILITY OPERATING LICENSE N0. DPR-44 & 56 4

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PEACH BOTT0!' ATOVIC POER STATION g CHLORINE MD'IMIZATIOt: STUT Mi OBJECTIVE To evaluate the effectiveness of low chlorine feed rates in ninimizing chlorino inpact on the environment.

REFERENCE Peach Bottom Atonic Power Station Environmental Technical III Specification 6.2.a.

M;THOD A test apparatus which sirulated the conditions of the Peach Botton Atonic Power Station condensers was assenbled on site.

This apparatus showed biological growth rate by weight difference with variable chlorination schedules. Because of the growth characteristics of biological naterial, any slinc fornation was considered unacceptable.

The test apparatus was positioned at the outboard screen nouse and drew water from the intake basin, the source of water for the condensers. The basin water was punped an : split into two (2) streans at 1.6 grn (7 fps); one strean was unchlorinated (pl) and the other was chlorinated (l'2). Tne flow was delayed h 55 seconds by passing through coils to simulate intake pipini; travel time, heated auring delay to 20*F above river tenperature to sinulate condenser temperature rise, ani then passed through two-foot sections of 3/8" Admiralty tubing. The Adniralty tubing was innersed in a constant tenperature bath of approximately 110*F to sirulate the stean space of the condenser.

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Chlorine was introduced to the test apparatus in the form of a sodium typochlorite solution with a variable stroke pur:p. River water sar:ples were taken to determine the chlorine denand of the river water and an appropriate concentrated chlorine solution was prepared. Chlorination schedules were maintained by controlling frequency of chlorination, concentration of free chlorine, an i tine length in minutes of chlorination to the test apparatus.

Chlorine residuals were deternined using an amphonetric titratior nethod.

The test apparatus was operated on a montnly cycle. At tne beginning of a cycle, the Aamiralty tube specinens were cleaned and we1 C hed. During the month, a chlorination schedule was main-tained. At the end of the cycle, the specinen tubes were renoved, visually inspected and re-weighec. If the weight differential was appreciable, the sline material vas nanoved with a plunger and collected for analysis. Chlorination schedules were re-evaluated each nonth based on sanple tube onservations.

The following data were taken dail," an. are listed in the following sheets.

1. Rau river water turbi:ity, pH and te perature (Tr2 ).

2. Ter:perature of time-delay effluent for both strea s (Tphi , Tph2 ).

3. Temperature of sanple tube inlet for noth strear.s (Taii , Ts12 )-

14 . Temperature of sa :nle tube effluent for both streans (Tsot, Tsoa ).

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6. Constant tenperature bath temperature (Tett).

7. Sanple punp dishcarge pressure (P).

8. Flow rate of both streane (q1, q2).

9. Canal basin level in feet.

CG'CL" SIT Several chlorination rates were tested during a one-year period; none of these rates gave a sufficient anoant of chlorine to nain-tain heat exchanger surfaces free of fculine deposits over a one-nontn period. Although it cannot be conclude i vnat is the satis-factory nanimum chlorine rate fcr Peach Fotton Atonic Power Station, foalinc deposits on heat exchan, er surfaces have been observed and documented Jaring perioos of chlorinator outages and of erratic chlorinator operation.

It has been observed, ho.:ever, that periods with chlorine rates that C ive a 0.5 ppn free t alorine residual at the condenser outlet water box, have kept the unit coniensers clean. Purther, these periods have created no adverse envircnmental ef fect on tne Susquehanna River since all tests darin;- this period have shown tne free chlorine residual tc be no creater than 0.1 ppn, as rea-sured at the point of discharge to the Conowinco Fond.

Our proposal is to operate below but no greater than t hat chlorine rate which will naintain the point of lisenarge to the Conowingo Pond at a free chlorine residual no creater tnan 0.1 ppn.

This will allow Peach Botton Atonic Power Station to keep heat exchanger surfaces free of fouling deposits while confoming to environmental regulations. Tnis shoula relieve concern regarding the envircnnental effects of chlorination. qg ^~ '

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• 15 1.2 1.3 108.5 290 2h.o 7.5 10/16/78 58- 65* 6h* 81* 80* 83* 82* 109* loh* 15 1.2 1.3 108.0 300 28.0 7.6 lo/17M8 57* 63* 63* 75* 7h* 77* 75* 109' 86* 15 1.2 1.3 109.0 310 23.0 7.6 10/18/78 56* 6h* 63* 80* 7d* 82* 79* 109* 102* 15 1.2 1.3 109.0 325 20.0 7.6 10/19/78 58' 65* 6h* 83* 60- Bh* 81* no* lob

• 15 1.2 1.3 109.0 330 23.0 7.7 lo/20M8 $8' 6h* 63* 81* 78* 83* '9* 11o* 101" 15 1.2 1.3 109.0 325 15.0 '.5 10/23/78 59' 6h" 63* 78* 75- 80* 76* 110' 92* 15 1.2 1.3 108.0 320 29.0 7.5 lo/2h/78 55* 62* 61* 7h* 72* 76* 73* 110' 88* 15 1.2 1.3 109.0 330 23.0 7.5 10/25/78 55* 61- 60- 76* 73- 78* 7h* 11o* 90* 16 1.2 1.3 109.0 320 18.0 7.5 10/26/78 59' 63* 62* 79* ':.

• 81* 76* 11 o* 93* 16 1.2 1.3 108.0 310 16.o 7.5 10/30/78 59* 6h* 62* 80* 76* 82- 77* 11o* 97- 15 1.2 1.3 138.5 310 27.0 7.5 lo/31M8 58* 63* 62* 79* 75* 81* 76- 11o* 95* 16 1.2 1.3 le8.5 305 25.0 7.6 n/1M8 57* 63* 61- 76- 72* 78* 7h* 109* 88* 16 1.2 1.3 109.5 315 28.0 7.5 11/2/78 58' 62* 60* 76' 72* 78* 73* u3* 88* 16 1.2 1.3 109.5 11 0 20.0 7.6 11/3/78 59' 63* 61* 78* 73* Ul* 75* llo- 92* 16 1.2 1.3 108.5 300 22.0 '.7 n/6/78 57' 62* 60- 76* 72* 78* 7h* 108- 90* 16 1.z 1.3 109.o 305 8.o 7.6 nMM8 57* 58' 58* 73* 72* 75* 7h* 109" 92* 16 1.2 1.3 108.5 285 15.0 7.6 n/8/78 55* 57* 57* 73* 73* 75* 7h* 110' 92* 15 1.2 1.3 108.0 290 10.0 7.5 n/9M8 55* 58* 58' 73- 7h* 75* 75* llo* 95* 15 1.2 1.3 108.5 290 12.0 7.5 n/13M8 5h* 58* 58- 75* 75* 77* 76* no" 97* 15 1.2 1.3 107.5 300 2h.0 7.6 n/1hM8 Sh* $9* 59' 76* 76* 79* 78* no* 97* 15 1.2 1.3 108.5 275 n.o 7.6 n/15M8 56* 59' 59' 76* 76* 78- 77- 109* 95* 15 1.2 1.3 107.5 285 13.0 7.6 n/16/78 56' 59' 59' 76* 75* 78* 77* In* 90* 15 1.2 1.3 108.0 275 15.0 7.6 11/17/78 56* 59' 59' 76* 75* 78* 77* In* 92* 15 1.2 1.3 107.5 275 22.0 7.5 11/20M8 53' 59* $9' 78* 76* 80- 78* no* 93* 15 1.2 1.3 108.0 2h5 10.0 7.h 11/21M8 55* 58' 57' 77* 16- 80* 76* n2* 92* 15 1.2 1.3 108.5 275 12.5 7.h n/22M8 5h* 57* 56' 77* 75* 78* 76* 111* 92* 15 1.2 1.3 108.0 300 11.0 7.6 11/27 # 0 h8- 53' 52' 7h* 7c' 76* 72* 11o* 92* 16 1.2 1.3 108.5 305 18.0 7.6

,'C)

-L 9 9 9 EEEEEEEEEEEEEE5EDEM

Tri Tphi TPh2 Tsit Tsi a Tso2 Tso a Tctb Thb P qi q2 Pond Level Cond. Turb.

Date *F 1 *F *F *F *F *F *F *F PSIG gg Feet pnhos JTU g 1_1/28/78 h6* $3' $0* 7h* 70* 78* 70* 110' 90.5* 16 3.2 1.3 107.0 310 1h.0 7.6 11/29/M h8* 52' 50' 75* 70* 78* 72* 110' 90.5* 16 1.2 1.3 lot.5 265 16.0 7.6 11/30/7d h6* $1* h9* 72* D/* 75* 70* 110' 90* 16 1.2 1.3 loe.0 285 15.0 7.7 12/1/7d h5* 50* hb' 70* 66* 7h* 68* lu)* 68* 16 1.2 1.3 11.0 260 12.0 7.6 12/h/78 LS* 50* L8* 70* 66* 72* 68* 109* 88* 16 1.2 1.3 107.5 265 25.0 7.5 12/S//d hd* h8' h7* 6h* 62* 68* 65* 110' 86* 16 1.2 1.3 IJ7.5 255 20.0 7.7 12/8/78 h5* 58* 58* 68* 97* 66* 6ti- 109* 87* 15 1.2 1.3 107.5 250 15.0 7.6 12/11/78 L3* L6* h6* 62* 62* 65* 6h* HO' 86* 15 1.2 1.3 107.5 235 1h.0 7.6 12/12/7d h5* h6* L6* 62* 62* 61

• 6h* 110* 86* 15 1.2 1.3 108.0 235 19.0 7.6 12/13/78  %* h5*  %* 00* 60* 63*

• In* 8h.2* 15 1.2 1.3 108.5 215 20.0 7.6 12/1h/78 hh* M* h6* 60* 60* (h* 63* 116' 82.h* 13 1.2 1.3 108.0 205 15.0 7.6 12/15/78 M* hh* h6* 61* 61* 76* 7h* 12h* 8h.2* 12 1.2 1.3 106.5 157 16.0 7.h 12/18/78 h6* h2* h2* 62* 62* 65* 66* 12h* 77* 12 1.2 1.3 107.5 190 5.0 7.6 12/19 //8 h5* h3' h3' 61* 61* 62* 63* 99* 82? 13 1.2 1.3 108.5 1ho Ib.0 7.h 12/20/78 h7* M* M* 68* 70* 71* 71* 106* 81* 12 1.2 1.3 108.25 150 10.0 7.3 12/21 /18 h5* hh* hh* 61* 61* 6h* 63* 115* S1* 12 3.2 1.3 108.75 190 1h.0 7.5 12/22/18 h5* h3' h 3' 61* 61* 62* 63* 118* 82* 12 1.2 1.3 107.25 19) 9.07.5 12/26 /18 h5* h5* h5* 62* o2' 65* 6h* 109* 82* 12 1.2 1.3 10/.5 210 37.0 7.5 12/27/78 hh* L3* h3* 61* 60* 63- 62* 109' 81* 12 1.2 1.3 1u7.25 220 25.0 7.6 12/28//8 h6* hl* hl* $9' 58* 62* 60* 109' 81* 12 1.2 1.3 108.25 2ho 30.0 7.6 1/2//9 h2* hh* 1,L ' 62* 62* 66* 66* 122' 8h* 13 1.2 1.3 108.0 225 23.0 7.3 1 /3 /19 h2* h3- h3' 60* 60* 63* 62* 108* 81* 12 1.2 1.3 107.5 215 5h.0 7.2

.3 a p V

/)

c f

9 9 O i re? p N eW W ep ww@ m w a re a e ra rv lar

The following Table has been corpiled to show the chlorine demand of the Susquehanna River at Peach Botton.*

Date ppn C1 added 2 /5 /18 0.21 2/27//8 1.10 3 /6 /18 1.h5 3 /15 /18 3.50 3 /22 /18 1.10 3 /29 /18 0.50 h/12/18 0.21 h/19/18 0.30 h/26/18 0.25 5 /3 /18 o.16 5/10//8 o.26 5 /18 /18 0.ho 5/2h/IS 0.30 6/8 /18 o.53 6 /28/18 1.00 7 /13 /18 0.72 7 /19 /18 1.20 7 /26 /18 0.68 8 /2 /18 0.91 8 /9 /16 1.12 8/16//8 0.80 8 /23 //8 o.98 8 /30 /18 0.97 9/1h//8 0.72 9 /18 /18 0.60 9 /21 /78 1.05 9 /25 /18 1.12 9 /28 /18 0.7e 10/2/t8 0.72 10/11 /78 0.91 10/18/78 0.78 10/25//8 0.h6

! n/1/78 0.72 11 /8 /18 0.32 11/15/18 0.50 1

I 11/22 /l8 0.50 11/29 //8 o.h2 O'I 2;9

Date pyn C1 added m 1213h8

/ 0.LL 12hoh8 0.h2 12/27M8 0.h9 1/3hp o.h5 1/19hp o.1h k

• Chlorine addition required before appearance of free residual.

E E

E E

E E

v.s W

1, 5

1 L

• e 32l 2.10

s

.d 6 3 l i h.

%ol - 1 - - 1 1 d

e V o S

1

-N g" t

a n l s i a d 5 5 8 r t i o o%l - 6 - - 5 6 l T o C

h S 7

2 .

s t 5 5 2 s

. e Ti - 3 - - h 3 e n o 2 9 9 l i M b L a

t

,s 3 9 1 3 6 7 g

n

. nm ti a 8 L 1

5 9 0 0 6 1 8 3 3 i Pargg w

o c 0 0 o 0 0 l

l o

f _ s

.d e li 6 9 8 9 h %ol - -

t V o 1 1 1 1 S

n d i e t .

d a e n l s_

l i a d 1 7 7 8 i r t i p o o%l - 7 5 - 1 1 m l T o 1 1 1 o h S c c n

n U e .

e , t 9 3 2 b 1 s h.

E %i - 2 2 - 8 8 e a 8 9 8 8 v e M a n h i L

s n

o

_ ti a

,s nm 5 7

2 8

9 6

h 8

9 6

0 1

1 1

8 @

i _ War 0 3, 1 o

t a

gg 1 o 5  ? 3 vr e ... . . . ..... . . . . .... . . . .

b s nnn iii nnn iii nnnnn iiiii nnnn nnnn nnnn iiii iiii iiii o mmm mmm mnmmm mmmm mmmm ummm e 550 000 000G0 0505 5055 5000 b e_ 222 222 22222 2121 2221 2222 u l t u - - - - - - - - - - -

d d

n h e mmm ppp mmm ppp mmmnm ppppp mmmm pppp mmmm pppp mmmm pppp a c ppp ppp ppppp pppp pppp pppp

. S 000 000 00505 0070 00o0 e n 122 223 22121 1101 1111 l

u o 11.l.1 d

i t

o0o oGo ooooo oe00 oooo o000 e a c. c- * >>*> * ,c ac- > *>*- ,

ac-h c

s i

n r

• +* -

c o 5 5 96 08 h1 5 396 6h1 n l 181 181 12311 2381 1122 9123 o h /// ///333 ///// //// //// ////

i C 222 hh555 5566 7778 8888 t

a n

i r

o 8 8 8 8 l 7 7 7 7 h / / / / 8 8 c 1 1 8 2 7 7

, s 2 2 1 2 / /

s e / / / / 7 6 t 2 3 5 6 / /

d a 8 9 o D - - - -

i - -

r 5 2 7 2 e

2 2 1 2 p /

1

/

2

/

h

/

5 M

7 7

/

8 e

h T

h t

n 1 2 3 h 5 6 _

o M

a j.

)

Line 41, Unchlorinated

__Wt. "

Line 52, Chlorinated Total .

Wt.

gain, 5 Total  %

Month Dates I Vol, gain, T Ch1crination achedule grats Moint. Solids T Vol Solids e Moist. Solids Soli 7 9/10 - 10A//8 9/11 --c- 0.13 ppm - 15 min.

9/1h -> 0.10 ppm - 15 nin.

9/18 -> 0.10 ppm - 15 nin.

9/21 --c- 0.10 ppm - 15 min.

9/25 --e> 0.10 ppm - 15 ain.

9/28

• 0.12 ppm - 15 min.

10/2 -> 0.13 ppm - 1< nin. 2.296 88.6 11.h 2.5 0.098 92.9 7.1 5.

8 10/5 - 11/3 /78 10/11 -c. 0,10 ppn - 20 min.

10/18

• 0.12 ppm - 20 nin.

10/25 -c. 0.10 ppm - 20 min.

11 /1

• 0.10 ppm - 20 nin. 3.90h 89.0 11.0 2.0 0.hhD 93.0 7.0 5.1 9 llA - 12/h/78 11 /8 --> 0.10 ppm - 10 nin.

11/15

• 0.10 ppm - 10 nin.

11/22 -e 0.10 ppm - 10 min.

11/29

• 0.10 ppm - 10 nin. 1. '36 88.0 12.0 h.6 0.678 95.9 h.1 10 2.h

• 12/5/78 - 1A/19 12/13

• 0.10 pen - 15 min.

8 12/20

• 0.10 ppm - 10 min.

12/27 --e> 0.38 ppm - 30 nin.

I 1/3 -c, 0.10 ppm - 10 nin. 1.127 96.7 3.3 2.0 0.197 93.h 6.6 11 3.0 1/5/ - 1/31//9 1 /19

• 0.16 ppm - 20 min. 0.018 61.1 38.9 16.7 0.hh8 5.h 9h.6 11.h i

de i

Note: Total solids determined at 10$*C 3 Volatile solids determir.ed at 650*C l'

1' 1

1  : .t 9 ..._

l cc 4 -

N h A (a

l t . .

e e @

& .Q W W - M --'