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June 6, 1963 l
l Mr. Jankowski U.S. Nuclear Regulatory Commission RES/ASTFO Washington, DC 20$$$
Dear Mr. Jankowski:
At the last meeting of the Peer Review Group for the accident source term program, it was proposed that tellurium be released at the same rate as iodine for high rates of Zircaloy oxidation. Partial justifica on for this thesis l
was data from TMI-2_as presented in a paper handed out at the aceting. As I i
stated for the record, it is my opinion that the tellurium data reported free TMI is inconsistant and inconclusive.
If this data is to be used as a basis for tellursus releases, the ortstnal emn4ng sheets should be reviewed to determine the accuracy of the reported results.
As I understand, you presently are attempting to do this.
I as including a brief discussion of the ceturium measurements that I an aware of and the questions raised in my mind from the reported results.
I would appreciate b_eing kept info'rsed of your inves tigation.
Sincerely yours, C'DT%
i C. D. Thomas, Jr.
Radiological Engineering Group CDT/ lum Att achme nt s b
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ALVAREZ85-110 PDN c77
Some Comments on Repor2ed Tellurium Measurements at TMI-II Reactor Coolant Sample el This sample was taken at 1600 on March 29, 1979__and analyzed by Bettis Accmic Power Laboratory (BAPL) and Babcox and Wilcox (B&W).
B&W did not report 132 e at 0.086% of the total Tellurium in the sample.
BAPL reported onl T
core inventory (compared to 8.41% for 131 )y(l>
I, It is suggested that this analysis be reviewed to determine if the presence of 132Te is in fact correct.
In particular, should other nuclides cf Telluriun have been detected (probably a strong function of the time the sample was counted). In addition, again depending on the time the sample was counted, was a possible interference from 138 s considered?
C Reactor Coolant Sample #2 This sample was taken at 0730 April 10, 1979 and was analyzed by BAPL, B&W, ORNL and Savannah River Laboratory (SRL).4 Zl~ With the exception of BAPL, the results are not generally available. Of interest in the BAPL results is that only 132Te and 03Ru showed fractions of core inventory less than the first RCS sample.
The results of these sample analysis should be reviewed to substantiate the 132Te and examine the possibility of other Te's present.
129 e and 129mTe be detected?
In particular, should T
Sump The sump was samg9 led on Auguse 20, 1979_and analyzed by OR!it.(3) The solution shows 1 Te present but nog 129mTe. The solids show 129mTe pgesent but no t 129 e.
The reason for this and the absence of II7"ITe and T
L7 e are not c le a r.
T Another sump sample was taken by S&W sometime later but never reported.
A sample taken and analyzed by EC&G in May 1981 reported no Te in the pump solution or solids.
Should their AA technique have detected Te7 Containment Air The containment atmosphere was sampled during the period April 29, 1980 to May 2,1960 and analyzed by EC&G.(4) The reported 129mTe concentration is from the footnote in Table it..
Should not 129 e, questionab{e as is evident T
627 e and 25mTe also have been, detected?
T penetration Seal Plate taken August 28, 1979, was analyzed by CRtlL.( 3) 12$mTe, This sample [29mTe were measured.
527mTe and The ratios do not appear correct, and 129 e and 127Te is not understood.
the absence of T
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References 4
1.
C. A. Felletier, C. D. Thomas, Jr., R.
I. Ritsman, F. Tooper, todine 131 Behavior During the TMI-2 Accident, EPRI Nuclear Safety Analysis Center Report NSAC-30, November 1981.
2.
W. N. Bishop, D. A. Nitti, N. F. Jacob, J. A. Daniel, Fission Product Release from the Fuel Followins the TMI-2 Accident.
1 l
3.
Letter R. E. Brookshank to Dr. Sen Rusche, Septee6er 12,1979.
4.
J. K. Martwell, J. W. Mandler, S. W. Duce, 5. G. Notes Characterization f
of the Three Mile Island Unit-2 Reactor Building Atmosphere prior to the Reactor Sutiding Purse, GEND-003, May 1941.
M
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