ML19340B758
| ML19340B758 | |
| Person / Time | |
|---|---|
| Issue date: | 10/29/1980 |
| From: | Frank Akstulewicz Office of Nuclear Reactor Regulation |
| To: | Houston R Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19340B759 | List: |
| References | |
| NUDOCS 8011120070 | |
| Download: ML19340B758 (3) | |
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/.p WASHINGTON, D, C. 20555 Jt OCT 2 919e0 MEMORANI.M FOR:
R. Wayne Houston, Chief Accident Evaluation Branch, USI FROM:
F. Akstulewicz, Nuclear Engineer, AEB SUWECT:
RESEARCH MEETING WITH BATTELLE COLUMBUS LABORATORIES REGARDING CONTRACT FOR ESTIMATING IODINE TRANSPORT UNDER SGTR CONDITIONS On October 6,1980, Rick Sherry (RES) and I met with representatives of Battelle Columbus Laboratories to review the progress of the research contract to investigate the transport of iodine under steam. generator tube rupture (SGTR) conditions. Attached is a copy of all viewgraphs and slides presented' during this meeting.
The meeting included a tour of the test apparatus as well as a demon-stration of the droplet size measurement technique proposed for this effort..The discussion also included a presentation of the computer code being ceveloped to predict the transport of iodine following an SGTR acci-dent factoring in the primary and secondary syste.m responses.
The proposed computer code is very similar to the TACT code in that it models the transport of iodine between regions defined by the code user.
The proposed code also has a sub-routine which calculates the themo-hydraulic conditions as the accident progresses and feeds ti *- infomation back into the iodine transport calculations. Also, as a part of this con-tract, Battelle will remove the sample themohydraulic portion from the code and will provide the coupling mechanism between the iodine transport portion of tneir code and the themchydraulic portion of the Brookhaven IRT code.
Dr. Raghuram presented a sample calculation using the proposedJcomputer code.
Because actual droplet size data was not yet available, a droplet size of 100 microns (dia.) was assumed. Using this assumption, the results of the com-puter run indicated that during the early stages of the accident, as much as 90*.' of the iodine in the water droplets would escape to the environment. Rick Sherry stated that he. believed the current modelling of the removal of water droplets by the moisture separators / steam dryers in the steam generators may be incorrect. CE has supplied proprietary information on its steam generator design which shows a designed high removal efficiency fo* water droplet sizes 70 microns (dia.) or larger. The Battelle calculation would appear to be in direct disagreement with the CE information. At this point, Dr. Raghuram stated that he would recheck the code -to verify that the steam dryer modelling was correct and that steam. dryer removal was considered when calculating the iodine transport to the environment.
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In closing, Battelle stat:c that they expset to complete all the drop size experiments and-to submit'a draft user's manual for their computer code by mid-November.
Any questions regarding this meeting or on the research program may va addressed to Rick Sherry (ext. 74266) or.myself (ext. 2/869).
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3 F. Akstulewicz Systems Analysis Section Accident Evaluation Branch cc: W. E. Kreger W. F. Pasedag T. R. Quay P. Easley PDK
Enclosure:
As stated i
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