ML19317D565
| ML19317D565 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 05/30/1975 |
| From: | Thies A DUKE POWER CO. |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7912060812 | |
| Download: ML19317D565 (8) | |
Text
y DUKE POWER COMPANY Powra Btnz.onto 4aa SouTu Cnunca SrazzT, CnAnzorrz,N. C. assos ns som v c No
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PRODbC,so,e AmeD Tmansassssion
..i, May 30, 1975 4,.
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Mr. Angelo Giambusso, Director
,q8 Division of Reactor Licensing
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U. S. Nuclear Regulatory Commission
./
Washington, D. C.
20555
's Re: Oconee Nuclear Station Docket Nos. 50-269, -270, -287
Dear Mr. Giambusso:
With regard to Mr. Gordon Dicker's letter of March 12, 1975 concerning the performance of the Oconee Nuclear Station radwaste systema, and as per my letter of April 14, 1975, the following information is provided.
Early experience with the Oconee radwaste systems indicated that they did not perform as well as expected.
The basic liquid waste management problem is the mixing of volumes of water containing no radioactivity, from miscellaneous sources, with small quantities of low-level waste water.
Thus, the composite mixturf must be processed as radioactive liquid waste.
In addition, this inadequate separation of sources of miscellaneous water which contain oil, soap, and cther chemicals has reduced the efficiency of the evaporators.
During the last six months of 1973, only one Oconee unit was in operation and measures to provide separation of rhe waste volumes were not complete.
Therefore, data for 1973 is not considered to be representative.
Since that time, improvements have been made to isolate non-radioactive waste from contaminated waste to the maximum extent possible; however, total separation is not practical. A test was performed during the period June 11 through June 25, 1974 to determine the liquid waste situation with both Oconee Unit 1 and 2 operational. The data from this test is presented in Table 1.
An analysis of this data indicates that 3.4 percent and 51.7 percent of the liquid waste volume from the station came from the bleed holdup tanks (BHUT) for Units 2 and 2, respectively.
A summary is presented in Table 2 of th'. monthly liquid waste volume released from the station and identifies the evaporator bottoms disposed of, the average daily feed to the evaporators and the average boron concentration of the evaporator feedwater.
It is difficult to determine F?C3 7.912080 bl -..
g Mr. Angelo Giambusso Page 2 May 30, 1975 the percentage of liquid waste that is RC bleed as this will vary con-siderably with unit operation and core life.
It is estimated that three-unit operation will result in 50 to 75 percent of the liquid effluent being from RC bleed.
Tables 3 and 4 summarize, by week, the liquid waste and evaporator bottoms which were disposed during 1974.
It should be noted that three-unit operation was not achieved during this period.
We trust the information enclosed in this report will be helpful in your study of radwaste system performance.
Very truly yours, A. C. Thies ACT:vr Enclosures
TABLE 1 OCONEE NUCLEAR STATION TWO WEEK TEST OF LIQUID WASTE SYSTEM No. 1 UNIT No. 2 UNIT STATION Data Power C~
~^
~
~^
" ~
B B"
1974 PPM Gals.-
Gals.
PPM Gals.
Gals.
Gals.
6-11 90 449 3435 1000 75 1100 2290 1509 4041 6-12 100 479 279 620 75 1103 1461 5383 8267 6-13 100 460 358 1074 75 1086 3471 3934 9887 6-14 100 467 152 1106 75 1100 2060 4314 10185 6-15 100 459 0
1450 75-1090 1060 2387 10340 6-16 100 453 175 755 75 1085 3081 3494 11786 i
6-17 100 449 447 1661 75 1088 2707 1060 7999 6-18 100 442 374 1335 75 1080
,4223 1596 5990 6-19 100 450 160 862 80 1124 880 3984 10279 6-20 100 436 0
1716 100 1109 3139 4268 8305 6-21 100 433 356 1269 100 1093 3371 4413 8622 6-22 100 419 432 349 80 1081 3788 3651 8802 6-23 70 424 606 807 80 1077 4312 2685 8620 6-24 82 426 0
3100 90 1088 4198 6951 9869 3
6-25 100-.
428
__ 0
.2360 80 1136 883 1663 7079 4
Avg.
96 445 452 1298 81 1096 2728 3420 8671 l
Avg. No. of Drums / day (6-11 + 6-25) = 20.07 Gals. of Evap. Bottoms / drum = 22 Boron Core of Evap. Bottoms = 10% BA
}
C -RC Boron Concentration of Reactor Coolant B
i BHUT Bleed Holdup Tank i
CTT
~ Condensate Test Tank -
I
TABLE 2 OCONEE NUCLEAR STATION
SUMMARY
OF BORON CONCENTRATION IN EVAPORATOR FEED Total Avg. Daily Total Avg'. Daily Avg. Daily Avg. Boron Conc.
Liq. Waste Liq. Waste Evap. Bottoms Evap. Bottoms Feed To Of Evap. Feed
- Released Released Disposed Disposed Evaps.
[
(Gals.)
(Gals.)
(Gals.)
(Gals.)
(Gals)
(PPM) 1974 Jan.
286,048 9227 15,484 499 9726 897 l
Feb.
233,194 8328 12,207 436 8764 870 Mar.
243,130 7843 11,938 385 8228 818 Apr.
188,890 6297 11,499 383 6680 1002
.j May 248,232 8007 13,307 429 8436 889 June 262,533 8762 12,895 430 9192 818 July 234,458 7208 13,156 424 7632 971
?
j Aug.
251,657 8118 11,484 370 8488 762 Sept.
286,560 9552 12,540 418 9970 732
]
Oct.
270,638 8730 9,941 321 9051 619 l
Nov.
232,926 7764 10,010 334 8098.
721 Dec.
227,504 7339 11,682 377 7716 854 l
(l 3gyg-.
Jan.
287,039 9259 10,571 341 9600 621 Feb.
242,383 8656 10,892 389 9045 753 j
Mar.
373,614 12052 13,361 431 12,483 604 l
I
)
TABLE 3 OCONEE NUCLEAR STATION 1974 LIQUID WASTE
SUMMARY
(Week)
Avg. Daily Avg. Daily Releases From Total Avg.
Shipments Off (1974)
Inventory (Gal.)
C.T.T. (Gal.)
L.A.W.T. (Gal.)
Released (Gal.)
Site By Tank Truck (Gal.)
1 10615 15574 569 16143 0
2 6833
-7997 1049 9046 0
3 9817 5773 74 5847 0
4 7566 8092 0
8092 0
t 5
13882 8589 0
8589 5000 6
14638 7839 316 8155 0
7 14125 7655 0
7655 0
8 14103 7011 1856 8781 0
9 12804 7663 738 8401 0
10 13713 4751 0
4751 0
11 13188 7898 181 8079 0
12 15303 9422 216
'9638 0
13 11465 6825 583 7408 0
14 13825 6044 450 6494 O
15 22017 3471-0 3471 5000 16 17190 6935 0
6935 0
17 12570 7672 0
7672 0
18 23275 3501 492 3993 d
19 23370 3741 671 4412 15000 20 18168 10093 0
10093 5000 21 19156 9980 0
9980 0
22 13045 10197 0
10197 5000 23 11110 9276 0
9276 0
CTT Condensate Test Tank LAWT Low Activity Waste Tank 4
TABLE 3 (W:nk)
Avg. D2:J.y Avg. Daily Releassa Froa Total Avg.
Shipm:nto Off (1974)
Inventory (Gal.)
C.T.T. (Gal.)
L.A.W.T. (Gal.)
Released (Gal.)
Site By Tank Truck (Gal.)
24 14632 8312 0
8312 0
25 14602 8826 0
8826 0
26 18802 8770 0
8770 0
27 18893 8131 0
8131 0
28 18998 8006 0
8006 5000 29 33850 6474 57 6531 0
30 29709 6880 0
6880 5000
/
31 35354 7153 0
7153 5000 32 28769 6435 1540 7975 5000 33 22063 7282 380 7662 0
34 26383 5293 0
5293 0
35 19182 6105 1029 7134 0
36 15803 10719 0
10719 0
37 23098 10015 0
10015 0
38 19143 7864 0
7864 0
39 16341 9851 0
.9851 0
40 15380 10675 0
10675 0
I 41 20614 9497 0
9497 0
42 25918 14850 0
14850 0
43 18715 9011 0
9011 0
44 20541 10791 0
10791 0
45 17084 6840 0
6840 0
46 25926 8185 3
8185 0
47 20962 7534 0
7534 0
48 16931 8099 0
8099 0
49 17067 4957 0
4957 0
50 33628 9273 0
9273 0
51 29006 7117 0
7117 O
52 18126 7913 0
7913 0
' Daily -
unce 80R5 196 8211 151
TABLE 4 OCONEE NUCLEAR STATION DRUMS OF EVAPORATOR BOTTOMS I-N VERMICULITE SHIPPED IN 1974 No.
Week Drums Curies 1
212 5.55 2
192 8.91 3
56 1.53 2.45 4
77 5
153 3.356 6
160 3.97 7
138 4.00 8
158 2.78 9
88 1.16 10 151 1.957 11 69 0.62 12 210 3.78 13 0
0 14 102 1.13 15 185 1.33
)
16 96 1.545
~
O.96768 17 172 - --
18 93 0.53251 19 181 1.55338 20 128 6.29772 21 231 15.4083 3.0171 22 86 23 136 4.37208 24 115 3.5095 136 2.6507, 25 26 121 2.2876
~
OCONEE NUCLEAR STATION DRUMS OF EVAPORATOR BOTTO)G l
IN VERMICULITE SHIPPED IN 1974 No.
I Week Drums Curies 27 167 7.2382 28 95 2.31 29 230 2.2922 30 185 2.7837 31 88 1.719 32 0
0 33 306 4.1241
/
l 34 53 0.7984 35 75 1.1684 36 62 2.0624 37 220 8.9763 38 94 2.1686 39 194 2.8989 40 0
O 41 155 4.9594 42 76 3.7309 l
43 142 10.6595
. - -.44 136 6.5806 45 130 15.0098 46 85 10.6741 47 112 5.0673 48 128 7.355 49 129 6.042 50 94 10.41 51 134 7.676 j
52 220.
9.0892 total 6756
~
220.45857' I
Daily Avg.
18.5 0.604
-