ML19210E973
| ML19210E973 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/21/1979 |
| From: | PORTER CONSULTANTS, INC. |
| To: | |
| Shared Package | |
| ML19210E923 | List: |
| References | |
| NUDOCS 7912130338 | |
| Download: ML19210E973 (2) | |
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Sumary of Gaseous Releases to the Environment at TMI During the Period of March 28 through May 31, 1979
?Thisenclosureliststheactivityreleasedofradioactiveiodineand fnoble gases from Three Mile Island Nuclear Station during the period
-of March 28 through May 31, 1979. The information in the following table, which was prepared by Porter-Gertz Consultants, Inc., is based on direct measurements at charcoal adsorption filters located at building vents for I-131, and on thermoluminescent dosimetry ddta (TLD) for noble gases.
Atmospheric Releases 3/28/79-4/1/79-3/28/79-3/31/79 5/31/79 5/31/79 131 Total I Released 4.57 Ci 9.6 Ci 14.17 Ci 131 Average 1 Release Rate 13.2 uCi/sec 1.82 uCi/sec 2.52 pCi/sec 131;U)
Highest Measured Release Rate During the Period 22.5 pCi/sec(2) 14.6uCi/sec33) 22.5 pCi/sec Total Noble Gases 6 Ci (4 ). 1.4 X 10 Ci 1.0 X 10' Ci N,.
6 I4 '
Released 8.8 X 10 Average Noble Gas Release Rate
- 25. Ci/sec 0.27 Ci/sec 1.78 Ci/sec Instantaneous Max.
Ncble Gas Release Rate
- 55. Ci/sec 5.8 Ci/sec
- 55. Ci/sec We have made calculations of releases based upon, not actual direct filter measurements for I-131 as was done' for the data presented above, but on air sample measurements. These calculations are not considered as accurate as the ones presented above (as they are based on a back calculation method), but serve as a check on the ones above.
The results of the calculational method was 10-15 curies for I-131 and are in good agreement with those of the table. Our calculations for noble gases based on the TLD data also resulted in agreement with the above values.
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' REFERENCES (1) During the period from March 28, 1979 until May 28, 1979 (except for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> on April 28) the TMI Technical Specifications for instantaneous dis:harges were not On May 2,1979, the station was once again in full canpliance with satisfied.
the TMI-TS for instantaneous discharges of I-131.
(2) Data obtained from GeLi analysis of charcoal cartridge from Unit 2 Station Vent (HPR-219) for a sampling period of 1.73E+5sec (1900, 3/28/79 to 1900, 3/29/79 This was the highest measured release rate during the period.
(3) Data obtained from GeLi analysis of charcoal cartridge from Unit 2 Station Vent (HPR-219) for a sampling period of 3.6E+3sec (1300, 4/14/79 to 1400, 4/14/79 This was the highest measured release rate during the period.
(4) From Table 4.4, Pickard, Lowe and Garrick, Draft Assessment of Offsite Radiation The instantaneous release Doses Following the TMI Unit 2 Accident (TDR-TMI-116).
rate was extrapolated from TLD measurements made during the period (0700, 3/28/7 The activity of the noble gases released during to 1600, 3/29/79) 1.19E+5sec.
this period was estimated to be 6.6E+6 curies.
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