ML19256F416

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Excerpts of Radwaste & Environ Monitoring Semiannual Rept, Jan-June 1972.
ML19256F416
Person / Time
Site: Quad Cities  Constellation icon.png
Issue date: 06/30/1972
From:
INDUSTRIAL BIO-TEST LABORATORIES, INC.
To:
Shared Package
ML19256F405 List:
References
FOIA-79-491 W1607, NUDOCS 7912190112
Download: ML19256F416 (14)
v • d • e


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RADIOACTIVE WASTE AND ENVIRONMENTAL MONITORING QUAD-CITIES STATION SEMI-ANNUAL REPORT JANUARY I THROUGH JUNE 30, 1972 IBT NO. W1607

  • F)(c ER ?TS REPORT PREPARED BY.

INDUSTRIAL BIO-TEST LABORATORIES, INC.

FOR COMMONWEALTH EDISON COMPANY 1625 164 August 15, 1972 -

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. 1 h A. Quad-Cities Effluents and Solid Wastes

1. Liquid Waste A total of 2.2 x 107 liters (5.84 x 106 gallons) of radioac:. u liquid wastes containing 7.30 x 10-2 curies (excluding tritium) were discharged from the station. These wastes were released at an average concentration that is 0.10% of the release limit of 10-7 Ci/ml for unidentified radioactivity. During the same period, January through June 1972, 3.69 x 10-1 euries of tritium were released. These data are presented in Table 1.

The maximum concentration of radioactivity, above background, in the Quad-Cities Units 1/2 discharge canal during the first six months of 1972 was computed to be 6.47 x 10-9 Ci/ml. This particular release occurred on June 30, when the "B" laundry drain tank was being emptied.

The duration of this maximum release was approximately 25 minutes. The computed maximum concentration of radioactivity in the discharge canal for each week of the reporting period is presented in Table 2.

An isotopic analysis was conducted on the June monthly composite sample which contained portions of all waste discharged for that period.

The June composite was analyzed because the activity level was generally higher than composite samples of other months and less decay had taken place, thereby permitting analysis by gamma spectroscopy. Analysis showed the radionuclides of cobalt-58 and chromium-51 to predominate, accounting for over 95% of the activity present. The remaining activity was composed of strontium-89 and strontium-90. Results are presented in Table 3. Gross alpha activity was found to be at or below background levels in the waste. Tritium values have been increasing with operating time, as shown in Table 4.

The quarterly average MPC of the waste discharged and the sum of the average fractions of the MPCs were determined from the isotopic analyse s. The average MPC is defined by MPC = (ECi)i- (E Ci/MPCI) and was computed to be 3.28 x 10-5 Ci/ml. The sum of the fractions of the MPCs is defined by F = E Ci/MPCI and was found to be 3.78 x 10-6

. Ci/ml.

2. Gaseous Waste The total quantities of gaseous radioactive waste discharged from the Quad-Cities Station during the reporting period were as follows: noble gases 3.049 x 103 Cil ; iodines 2. 7357 x 10-2 Ci; particulates 1. 313 x 10-3 h Ci; and tritium 3. 8 x 10-1 Ci. Gaseous wastes released from the station are summarized in Table 5.

1 includes radioactivity from all known contributors. '

. . 2 O ase us radi active waste released fr m Units 1/2 was discharged from the Units 1/2 chimney at the following rates: noble gases 1.94 x 10 pCi/sec; iodines 1.70 x 10-3 pCi/sec; and particulates 6.05 x 10-5'pCi/sec.

The percentages (%) of release limits for noble gases, and iodines plus particulates during the reporting period were: 6.25x10-2 and 2. 7. . ~,

o respectively. Average discharge rates for Units 1/2 out of its ventilation stack were: iodines 2.90x10-5 pCi/sec and particulates 2.34x 10-5 pCi/sec.

Percentage limit for the Quad-Cities Units 1/2 vent stack was 1.75x 10-1 %

for the iodines plus particulates. Gaseous release rate data are shown in Table 6.

Mnvimum station gaseous activity discharge rates for a 24-hour period are presented in Table 7. The marimum station noble gases and iodines plus particulates discharge rates through the chimney for 24-hour period, 0.24% and .448% of the annual average release limit, occurred on June 28,1972 and during the period June 27 to July 1,1972, respectively.

The rnarimum station iodines plus particulates discharge rate through vent stack for 24-hour period,1.41% of the annual average release limit, occurred during the period June 27 to July 1,1972. Thus, the gaseous wastes released from Quad-Cities Station were at levels far below the limiting condition for operation given in the Technical Specifications. Isotopic analyses of offgases from Quad-Cities Units 1 and 2 are presented in Tables 8 and 9 The composition of off-gas at the chimney is predominantly krypton-88 and xenon-135 (Tables 10 and 11). Xenon-138 is the most abundant nuclide at the steam jet air ejection, but it comprises only a small fraction of the total off-gas at the chimney, due to its rapid decay rate.

The marimum concentrations of particulates in the environs were cstimated by multiplying the monthly average release rates of particulates (6) by the monthly maximum ground level (X/Q) dilution parameter provided by the meteorological monitoring program at Quad-Cities Station. The results of this work are shown in the following: -

O 1625 166

- -m m-m

3 O

Estimated Maximum Concentrations of Particulates at the Point 380 m North of Station" X sec \

b rg f Cil Percent c

Month 6 [( m3/ d (f Ci3sec[ (6/ x 6 x 10-6 (cc / of limit January 2.55 x 10-10 1,49 x10-58 3.80 x 10 21 8. 8 x 10-6 February 2.02 x 10-9 1. 23 x 10-5 e 2.48 x 10-20 5. 8 x 10-5 March 1. 63 x 10-8 2. 07 x 10-5 8 3. 37 x 10-19 7. 8 x 10-4 April Data not 4. 05 x 10-5 May available 1. 37 x 10-4 June at this time 1. 38 x 10-4 1st Quarter 1. 01 x 10-9 1. 60 x 10-5 1. 62 x 10-20 3. 76 x 10-5 2nd Quarter 1. 05 x 10-4 Semiannual 6. 05 x 10-5 8 Locations of monthly and quarterly maximum concentrations are not necessarily the same for each period of time. (X/O data from BIO-TEST).

b Total particulate release rate for station Q-C 1/2, chimney.

c From 10 CFR 20, Appendix B, Table II, Column 1, MPC for 90Sr is 3 x 10-11 pCi/cci- 700 d = 4,3 x 10-14 pCi/cc.

d Rogers, L. and C. C. Gamertsfelder. 1970. U. S. Regulations for the Control of Releases of Radioactivity to the Environment in Ef~Sents from Nucle.ar Facilities. IAEA Symposium, New York. August 1970.

c Since the station was operating at such very low power levcis during this time, this release is probably radioactivity from fallout which is contained in the turbine building air.

Thus, the estimated monthly maximum increment of particulate activity in the environs was approximately 3.37 x 10-19 pCi/cc (3.37 x 10-7 pCi/m3 ),

This is an undetectable level in the p esence of a background which is more than six orders of magnitude greater.

The maximum concentrations of iodine in the environs were estimated and are as follows:

O 1625 167

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, Estimated Maximum Concentrations of Iodine at the .

Point 380 m North of Station" X / f Ci3b IXT fpC ' 2r.

Month Q (sec}

mJ 3 Q (sec (6[ x Q x 10-6 kcc ) of limit c January 2. 55 x 10-10 0 0 0 February 2.02 x 10-9 0 0 0 March 1. 63 x 10-8 0 0 0 April Data not 0 May available 3. 6 x 10-3 June at this time 6.58 x 10-3 1st Quarter 1. 01 x 10-9 0 0 0 2nd Quarter 3.39 x 10-3 Semiannual 1.70 x 10-3 a

Locations of monthly and quarterly maximum concentrations ore not necessarily the same for each period of time. (X/O data from B10-TEST).

b Toth1 iodine release rate for station Q-C 1/2, chimney.

c From 10 CFR 20, Appendix B, Table II, Colunm 1, MPC for 131 7 i, 1 x 10-10 pCi/cc i- 700 = 1.4 x 10-13 pCi/cc.

The manmum concentrations of noble gases in the environs were calcu-lated with the following results:

Estimated Maximum Concentrations of Noble Gases at the Point 380 m North of Station d X [sec T Cih e fX) I Cil Percent Month Q \,m3) Q[tsec] (3) x Q x10-6 cc of limit f

January 2.55 x 10-10 0 0 0 February 2.02x 10-9 0 0 0 March 1. 63 x 10-8 0 0 0 April Data not 1.26 x 102 May available 3.618 x 102 June at this time 7.898 x 102 1st Quarter 1. 01 x 10-9 0 0 0 2nd Quarter 3.881 x 102 .

g Semiannual 1. 940 x 102 d

Locations of monthly and quarterly manmum concentrations are not necescarily the same for each period of time. (X/Q data from B10-TEST).

h e Total release rate for station Q-C 1/2, Chimney.

I 3 x 10-8 pCi/cc for a diffusion mixture of noble gases (Rogers & Gamertfelder 1970). .

5 O Five and 20 mile, radius X/O dilution contours are presented in Figures 1-8 for the months of January, February and March and the average for the quarter.

3. Solid Waste A summary of solid wastes shipped from Quad-Cities Units 1/2 during the first six months of 1972 is given in Table 12. The total volume shipped was 1.48 x 104 ft3 with a total activity of 4.53 x 10-1 curies. The largest volume shipped was in April (5.37 x 103 ft 3) and the largest amount in terms of activity was in June (1.99 x 10-1 curie s) .

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s Table 1. Radioactive liquid waste summary, Unit 1/2, Quad-Citles Station, January-June 1972 Total curie s* Total liquid" Total dilution b Average outfall* Pe rcent Total curies

  • Month discharged waste volume volume concentration of of Tritium (Excluding Tritium) (Gallons) (Gallons) (p Ci /ml) limitd released 5 10 1. 59 x 10 3 1. 81 x 10"3 January 1. 52 x 10-4 8.60 x 10 2. 53 x 10 1. 59 x 10-12 5 10 1.74 x 10-3 2.00 x 10~3 February 1. 39 x 10~4 9.61 x 10 2.11 x 10 1. 74 x 10-12

~

10

>! arch 1.54 x 10-4 1. 03 x 10 6 1.96 x 10 2. 07 x 10-12 2. 07 x 10-3 2. 03 x 10-3 5 10 9. 44 x 10~3 9. 75 x 10-3 April 9. 71 x 10-4 8. 05 x 10 2. 72 x 10 9.44 x 10-12 May 4. 23 x 10-2 7. 57 x 10 5 3. 20 x 10 10 3. 49 x 10-10 3. 4 9 x 10* I 1. 61 x 10-1 10 1.93w 10-1 June 2. 93 x 10-2 1. 4 3 x 10 6 3. 07 x 10 2. 52 x 10-10 2. 52 x 10-1 Total 7. 30 x 10-2 5. 84 x 10 6 1,56 x 10 11 1. 0 3 x 10- 10 1. 0 3 x 10- 1 3. 69 x 10-1

  • Sum of releases from Unit 1/2 waste tanks.

b Total cire. water flow through Unit 1/2 during the month.

C Average concentration in outfall, excludt;.g background. (Total curies discharged -e- total dilution volume).

d Limit for average monthly release is assumed to be limit for instantaneous release 1.0 x 10-7 p Ci/ml.

  • Average tritium content multiplied by gallons of waste released.

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O O Table 2. Weekly rr aximum concentration of radioactivity above background, Unit 1/2 Discharge Canal, Quad-Cities Station, January - June 1972.

Date " Time of release Waste tank Discharge ( C1/ml) Percent of limits c Jan. 1/2 2100 - 0400 AWST d 1. 73 x 10-12 1. 73 x 10-3 Jan. 8/9 2350 - 0600 BWST 2. 99 x 10-11 2. 99 x 10-2 Jan. 9/10 2046 - 0130 BWST 8. 5 x 10 - 12 a. 53 x 10-3 e Jan. 19/20 2307 - 0340 BWST 5. 29 x 10-12 5. 29 x 10-3 Jan. 29 1212 - 1805 BWST 1. 28 x 10-11 1. 28 x 10-2 Feb. 5 '230 - 1925

. AWST 1. 96 x 10-11 1. 96 x 10-2 Feb. 5/6 2150 - 0525 AFDST I 4. 68 x 10-12 4. 68 x 10-3

, Feb. 14 1122 - 1630 AFDST 7. 03 x 10-12 7. 03 x 10-3

! Feb. 23 1352 - 2035 AWST 2. 55 x 10-11 2. 55 x 10-2 March 4 0200 - 0823 AWST 1. 06 x 10-11 1. 06 x 10-2 i March 5 1342 - 2220 BFDST 1. 81 x 10-11 1. 81 x 10-2

, March 15/16 2350 - 0535 BWST 3.3 x 10-12 3. 35 x 10-3 March 19/20 2131 - 0405 BWST 8. 51 x 10-12 8. 51 x 10-3 March 29 1210 - 2030 AWST 3. 70 x 10-11 3. 70 x 10-2 April 3 0345 - 1310 BFDST 3. 52 x 10-12 3. 52 x 10-3 e April 13 /14 2147 - 0524 AFDST 2. 97 x 10-11 2. 97 x 10-2 April 20/21 1551 - 0030 BFDST 1. 01 x 10-11 1. 01 x 10-2 April 29/30 2205 - 0830 BFDST 1. 97 x 10-10 1,97 x 10-1 May 4 0326 - 0350 BLDTS 3. 75 x 10-11 3. 75 x 10-Z e ,

May 12 0522 - 1330 BWST 1. 23 x 10-9 1. 23 x 100 May 16 1115 - 1158 ALDT 3. 92 x 10-9 3. 92 x 100 May 21 0255 - 0325 ALDT 2. 9 x 10-9 2. 90 x 100 May 28/29 2330 - 0850 BFDST 4. 97 x 10-9 4. 97 x 100

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0 Table 3. Isotopic analyses of liquid waste, Units 1/2, Quad-Cities Station, January-June 1972.

Isotope Activity

  • 1 , uCi/ml ,

Percent of composition"

-6 Cobalt - 58 (1. 38

-8 Strontium - 89 (5. 65

  • 2. 32) x 10- 27,20 M

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Curies released Month Co-58 Sr-89 Sr-90 Cr-51 Total

~4 -6 ~7 ~4 January 1. 06 x 10 4. 33 x 10 6. 38 x 10 4.14 x 10 -5 1. 52 x 10 5 6 1. 39 x 10 ~4 February 5. 83 x 10 ~7 3. 78 x 10 -5

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-2 1. 20 x 10 -3 1.15 x 10 -2 4. 23 x 10 -2 May 2. 94 x 10 1. 78 x 10 ~4 June 2. 04 x 10

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8. 34 x 10 -4 1. 23 x 10 ~ 7. 97 x 10 -3 2. 93 x 10 -2

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-6 Strontium - 89 3. O x 10 - 1.17 x 10

-I Strontium - 90 5. 20 x 10 3. 0 x 10 - 1. 7 3 x 10-6

-II Chromium - 51 3. 37 x 10 2. O x 10 ~3 ' l. 69 x 10-0

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3. 78 x 10

-6 Total 1. 24 x 10 a

b Composite sample made from representative floor drain sample tanks during June.

Total curies discharged total dilution flow.

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.t Table 4. Waste and floor drain water samples, analysis for tritium, Quad-Cities Station, January - June, 1972. .

Sample Date Tritium "

Floor Drain January 1972 Composite (5. 7 1. 6) x 10-1 February 1972 Composite (6. 2

  • 1. 6) x 10-1 March 1972 Composite (4. 9
  • 1. 6) x 10-1 April 1972 Composite 3. 2
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May 1972 Composite (3. 2

  • 0. 04) x 10 June 1972 Composite (6.89 0. 07) x 10 1 Waste Sample January 1972 Composite (5.4 1. 6) x 10-1 February 1972 Composite (4. 8
  • 1. 6) x 10-1 March 1972 Composite (5. 5
  • 1. 6) x 10-1 April 1972 Composite 1.89
  • 0.17 May 1972 Composite (1. 01
  • 0.'01) x 102 June 1972 Composite (1.21
  • 0. 01) x 102 8

Activities are given in pCi/ml. The error given is the probable counting error for the 95% confidence level.

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