ML19338D879
| ML19338D879 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 08/12/1980 |
| From: | Snyder B Office of Nuclear Reactor Regulation |
| To: | Chong L AFFILIATION NOT ASSIGNED |
| References | |
| NUDOCS 8009240100 | |
| Download: ML19338D879 (1) | |
Text
p
< x =.
z; -
a p* **0u p
UNITED STATES y
((gg NUC1. EAR REGULATORY COMMISSION i
5
/c E WASHINGTON, D. C. 20555 4,
N Aug 121980 Mrs. Lynn R. Chong West Rumney Village Rumney, New Hampshire 03266
Dear Mrs. Chong:
This letter is in response to your letter of June 30, 1980 to the TMI Support Staff. You requested information concerning the identity of radionuclides in the Three Mile Island Unit 2 reactor building. It should be noted that purging l
of the reactor building atmosphere was approved by the Commission on June 12, 1980 and commenced on June 28 and was concluded on July 11 when the concentration of Kt-85 was reduced to a level of approximately 2.0 x 10-5 pCi/cc. Thus, the following discussion of reactor building airborne radioactivity pertains to conditions prior to the purge.
Licensee sample data shows that particulate levels were less than 1 x 10-9 pCi/cc, the primary radionuclide being Cesium-137. Gross beta analyses were carried out specifically to determine the level of Strontium-89/90. These analyses show that the concentratiorsof these isotopes were small, on the order of 1 x 10-10
'pCi/cc. Gross #. measurements indicate that transuranic concentrations are less than 2 x 10-10 pCi/cc. Tritir concentrations were measured at 8.4 x 10-5 pCi/cc.
All other radionuclide concentrations were below the minimum detectable levels
(<1 x 10-10 pCi/cc) for the analytical instrumentation system.
When the above measured concentrations are compared with the measured Krypton-85 concentration of 1.0 pCi/cc it can readily be seen that Krypton-85 was the dominant radionuclide in the Unit 2 reactor building.
1 Sincerely, l
0.'$d b
Bernard J. Snyder, Program Director T'ree Mile Island Program Office Office of Nuclear Reactor Regulation 8009240100