ML19322B509
| ML19322B509 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/23/1979 |
| From: | Vollmer R NRC - TMI-2 OPERATIONS/SUPPORT TASK FORCE |
| To: | Lewis M AFFILIATION NOT ASSIGNED |
| Shared Package | |
| ML19322B511 | List: |
| References | |
| NUDOCS 7912040085 | |
| Download: ML19322B509 (3) | |
Text
__
Ve x
P o
.NOV 2 31975i
[
Mr. Marvin I. Lewis
[
6504 Bradford Terrace G
Philadelphia, Pennsylvania 19149
Dear Mr. Lewis:
Your letter to Mr. Victor Stello, of May 27, 1979, was fonvarded to me for l
reply.
I apologize for not providing this response to you sooner but, as you
[
are aware, the Commission and staff have been occupied viith continued support t
of the efforts at Three Mile Island, Orders to other facilities, appearances before the President's Cormiission and various comittees of Congress that are investigating the Three Mile Island accident, and the realignment of our own resources and priorities to give immediate attention to the problems resulting from the accident.
The answers to your four questions are attached as an enclosure.
I hope they provide you with the information you seek.
Sincerely, Odttnat Wna ty:
Bashard R.Jenmar Richard H. Vollmer, Director
{
Three Mile Island 2 Support p
1:
Enclosure:
Answers to Four Questions DISTRIBUTION:
Docket (w/ori inc ltr)
RReid NRC POR (w/inc.ltr)
DDilanni Local PDR
^ Nelson L
3
- n HSilver NRR r/f RIngram/LA SEP/TMI r/f (w/inc ltr)
TMI Site r/f L-PSB/TMI r/f (P-433)
RVollmer F
SMiner 1.
JCollins W0liu DEisenhut/ DOR #70 I Al TMI.4/T!,.d TMI-2./. Igg
. u011u/mcy... S!.ti.ner./).t......
.. Dam. g.t.s....
...m-jj
.go me.r.....
-.. o.
11/.d!!9...Ji/dl/.79 11/'A/79 m e.
'l! u s
- c v r a a '* * " ' ' a ' a ' * * *" ' ' ' ' ' " ' ' ' ' " ' ' '
. ;0 TO"U 31< (F.75) Nac2: 0243 I
7 91 2040 d 6 u
E
]
r 4
Enclosure 1.
What is the daily leak rate into the containment structure (presumably from the core)?
A.
As of November 9,1979, the primary coolant leak rate into containment was between 0.1 to 0.2 of a gallon per minute.
The water leaks originate from various seals on valves and pumps inside the containment.
2.
What are the internal temperatures of the core, pressurizer etc.?
A.
On November 9,1979, the average temperature of both internal reactor U
core and pressurizer tank was 170 F.
3.
What is the measured and calculated thermal megawatt production at this time in the core (presumably from decay heat)?
A.
The thermal yield of the reactor core, on November 9,1979, was 0.39 megawatts thermal.
4.
What are the Iodine concentrations in stack, site, fenceline, LPZ, etc?
A.
A total of 15 curies of radiciodine was released to the atmosphere during and after the TMI-2 accident.
During April 5,1979, an atmospheric sampler for radiciodine indicated an air concentration of iodine-131 of 1.6 picocuries/m.
The location of the sampler was 0.5 miles to the SSE of the site center.
At about the same time, dosimetry indicated doses, in the 72-hour period Aoril 3 to April 6,1979, of from
-2 O.6 (fiorth Site) to 21.8 (SW) mrem on the site, from 1.5 (NNW) to 1.8 (South) mrem at the exclusion area parameter, and from 0.9 (NNW) to 3.0 (East) mrem in the inner area of the LPZ (both 0.4 miles from site center).
These doses include background radiation and indications are that the contributions from radiciodine are less than 3% of the dose above background.
f
.