ML20235G066
| ML20235G066 | |
| Person / Time | |
|---|---|
| Site: | 07001856 |
| Issue date: | 03/05/1975 |
| From: | Plato P MICHIGAN, UNIV. OF, ANN ARBOR, MI |
| To: | Dragonette K NRC |
| Shared Package | |
| ML20235F818 | List: |
| References | |
| 0494, 494, NUDOCS 8902230106 | |
| Download: ML20235G066 (1) | |
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REGULAT0TlY W~ * ^E CY i
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l]E UNIVERSITY OF MICHIGAN r
SCHOGL OF PUDUC HEALTH Anu Annon, MICHIGAN 4104 8
Department of Environmental
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Dear Ms. Dragonette:
Dr. G. Iloyt Whipple has ask me to reply to your letter to him of i
February 13, in which you requested udditional information concerning our application for a special nuclear material license, formally License No.
SNM 705.
Your letter shows thren areas for additional information:
1.
The neutron cource is used to irradiate personal dosimeters. An exposure rig is located in the same room as the neutron source. About twice a year, the neutron source is removed from it; storage container with remote handlers and placed on the exposure rig.
The student making the irradiation then i
leaves the room while the exposures are being made.
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Any student who uses the source is in the seccnd year of our Master of Science program in radiological health.
Such a student would have taken the f
following courses before using the neutron source:
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EIll 693 Radiation Physics 4 credits EIll 694 Radiation Dosimetry 4 credits EIII 695 Radiation Biology 4 credits l
2.
The student who uses the neutron source wears a film badge that is sensitive to neutrons. The dose rate 20 cm from the source is about 0.8 mrem l
per minute.
Since it takes only about 0.25 minutes to transfer the source 4
l from its storage container to the exposure rig and since the distance l
between the source and the student is about 75 cm during the transfer
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procedure, very little exposure is expected per transfer. About 10 transfers l
are requirca every six months.
3.
Only one key exists to room B-157.
This is normally kept with our secretary.
The student checks the key out and keeps it while the source is exposed.
In addition, a rope is stretched across the door with a sign attached which warns that a radiation source is out of its container.
I Please let me know if additional information is required concerning these or other points.
Sincerely, 8902230106 66,10 F
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REG 3 LIC70 pNU y
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Phillip Plato, Ph.D.
Associate Professor of 043,4 PP/dvde Radiological liealth
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