ML20197E568
| ML20197E568 | |
| Person / Time | |
|---|---|
| Site: | 07001045 |
| Issue date: | 01/24/1980 |
| From: | Megli D EVANSVILLE, UNIV. OF, EVANSVILLE, IN |
| To: | NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| Shared Package | |
| ML20197E574 | List: |
| References | |
| 15305, NUDOCS 8003030009 | |
| Download: ML20197E568 (5) | |
Text
Y Univcrsity cf Evb vill 3 b) 7 0 ~ / Y8-n.-
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January 24, 1980 V
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License Management Branch 30r
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University of Evansville P. O. Box 329 Evansville, Indiana 47702 Program Code 22120 License Nurber SilM 995 Renewal of License Gentleren:
Please accept this letter of application for License Penewal.
1.
Oniversity of Evansville P. O. Box 329 Evansville, Indiana 47702 Governed by a Board of Trustees with 1979-80 officers as follows:
Officers: Board of Trustees 1979-80 Chairman: John H. Schroeder 620 colony Road Evansville, Indiane 27715 4
Vice Chairman: firs. Charles Klar.er Post Office Fox 125 Jasper, Indiana a7540 f
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Dll L Secretary:
Mr. Albert L..Jeffers 3112 Oakwood Drive i
Ft. Wayne, Indiana 4fR1r g
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Treasurer: fir. Walter A. Schlechte 1315 East Chandler f.vnnua
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Evansville, Indiana 4771" Av oV aJ CC E.T
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2.
The neutron source is used for teachino purposes. The source remains in the water tank except when teing leak tested and is used only in the laboratories in the Engineering-Science buildinc. When not in use, the neutron howitzer is kept in a security cave built into an outside baserent wall off of room E101.
3.
Request reneual for 5 year period.
4.
Pu-Be neutron source encapsulated in stainless steel. The source contains eighty (80) grams of Pu-239.
5.
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The neutron source will be used by, or under the supervision of, 52 and Cr;5 Darrell l'egli, Radiation Safety Officer Masters thesis was on V Associate Prof. of Physics Peta-Pay End-Point Enercy Petemina-A.B. Kansas Wesleyan Univ.
tion by Scintillation Spectrorater Salina, Kansas Methed.
Ph.D. dissertation was on M.S. Penn State Univ.
Measurement of Some Nuclear Para-Ph.D. Kansas State Univ.
regsingeRadiogtivedecayof Ce
, Er and Zr I verked during the summar of 1968 on nuclear decay schemes at Los Alaros Scien-tific Laboratories.
Specific experiences in rad'iological safety and materials handling include the following:
(a) Calculation of amount of sample material and exposure tira for a civen neutron flux to produce a desired activity.
(b) Preparation and sealing of sources in sample holders for exoosures in nuclear reactors.
(c) Monitorine of sources after removal from reactor with portable G-M type survey meters.
(d) Preparation of beta and gamma sources for countinn experirents.
(e) Calculation of activity at later tires knowinn initial activity and halflifo.
(f) Attendinc fluclear Physic Seninars at Kansas State University at which tha Radiation Safety Officer covered terninolocy of radiation exnosure and fomulas for calculating dosaces.
(g) Attendinc several sessions at Los Alamos Scientific Laboratories in Sumar 1968 on Fluclear Safety which covered handling of radioactive,raterials.
The experience with raterials has been with sources made in nuclear reactors
-for beta and/or camra countinn experirents.
14 st sources ranced fror micrneurie 0
to millicurie arounts.
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Other staff:
Benny R. Riley 1.
Resident Research Associate at Associate Prof. of Physics Argonne National Laboratory --
B.S. Murray State Collene summers of 1964 and 1965.
M.S. University of Ky.
2.
Worked in the experirental area Ph.D. Carnegie-Mellon Univ.
with a He bubble chamber at the in Elementary Particle zero-oradient-synchrotron at Physics Argonne while doing Ph.D. thesis.
3.
Did sone experiments at Oak Ridge National Labs. with ra-diation sources.
7.
The following describes some of the radiation defection instrumentation avail-able for use.
(a) Two CDV-700 Model No. 6B Victoreen Inst. Co. Geiger Counters, Sensitive to betas and gammas.
0-0.5, 5 and 50 MR/hr ranges - these instruments have calibration sources attached.
(b) Three CDV-715 Model No. IA Victorcen Inst. Co., sensitive to garras with 0-500 R/hr range.
(c) Eight CDV-742 Pocket Dosimeters (0-200 R range) with two CDV-750 Dosimeter chargers.
The above radiological conitoring equipment if prepared in accordance with the office of Civil Defense and the Indiana State Department of Civil Defense by the Indiana University Radiological Maintenance and Calibration Program.
s Other monitoring instruments include:
(a) One Bendix 200 mrad neutron insensitive ganna only pocket dosineter.
(b) One Bendix 200 crad fast neutron plus ganma tissue equivalent pocket sodi-reter.
(c) One Bendix 120 mren thernal neutron pocket dosimeter.
(d) Two Precision Radiation Inst., Inc. Model 107C portable Ceiger Counters.
(e) One Precision Radiation Inst., Inc. Model 118 portable Scintillation counter.
(f) One Oakridge Atom Industries, Inc. Lecturere II Geiger Counter.
(g) One Landsverk Electrometer Company Model L-750 Analysis Kit.
(h) Scintil,l.ation probes for gammas, fast neutrons, slow neutrons, alphas and betas to be used with a Baird Atomic 530A pulse-height analyzer.
(1).One 256 channel pulse-height analyzer tanufactured by the Nucleus.
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The procedure used to test the Pu-Be neutron source for alpha-emitter leakage is as follows:
The neutron source is removed from the tank with source-handling tools.
It is rubbed on a piece of filter paper and quickly returned to the water tank.
The filter paper is then counted for alphas with an alpha probe (Paird Atomic 20-804) connected to a Baird Atomic 530A pulse-height analyzer. The calibra-tion procedure consists of counting a standard Am-241 alpha source and checking background and counts from a clean filter paper. All counting is done with the same source-to-detector distance.
The alpha activity on the test wipe can then be calculated. The leak tests are perforr'ed by the Radiation Safety Officer. The source is leak tested every six months.
8.
The neutron source is moved from its security cave into the nuclear physics lab only when it is needed. This would be at most 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> per calendar quarter.
An AEC representative monitored the neutron source (11/25/68) and from his data the dose rate is approximately 1.6 mrem /hr at one meter from the source when contained inside the water noderator.
The students work at an average distance of 3 meters from the source.
Their average dose is then about 2 mrem per calendar quarter from neutrons.
The beta and gamma radiation levels in the nuclear physics laboratory are only slightly abovn background.
Measurements with a G-M survey meter indicate the average level is at nost 0.02 MR/HR above background for betas and gammas.
Students spend, at most, 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> in the laboratory per calendar quarter. This results in a maximum dose of about 0.4 mrem per quarter from betas and gammas in addition to background.
In all, the students receive about 2.4 mrem dose for one calendar quarter above background from betas, gammas and meutrons in the nuclear physics laboratory (staff menbers may receive 5 mrem).
Dosages to persons in other laboratories on campus from the neutron source would be even less than that to persons who work in the nuclear physics laboratory.
These dosaces fall below the 25% of the maximum permissible dosages specified in pararraph (a) of section 20.101 of 10 CFP, Part 20.
For the above reasons, neither pocket dosimeters nor film badges are worn in the nuclear physics lab on a regular basis.
Students are instructed in the safe use of radioactive materials and are closely supervised by faculty members who are acquainted with the safe use them.
Students are given common sense instructions in the use of radio-active materials, such as:
a.
Don't place any radioactive source in your mouth or inhale any radioactive materials.
b.
Don't place any radioactive sources in your pocket or hold them close to your body for extended periods of time.
c.
Don't spend more tire than necessary near the neutron howitzer.
d.
Con't remove any radioactive sources from the laboratory, e.
Don't eat around radioactive materials and be sure to wash your hands before ' eating.
f.
Report any accident to the instructor immediately.
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Page In the event of accidental internal uptake of radioactive materials, the person would be taken to a local hospital which employ persons trained in nuclear medicine.
Radioactive sources produced in the neutron howitzer are either solid metals or solid chemicals sealed in small plastic vials to eliminate spillinn of radio-active materials.
Because of the relatively small neutron flux only relatively small activities i
of relatively short half lives can be produced.
These sources are never disposed of. They are always kept to decay away.
The local campus safety and security officers and the local fire department have been informed of the presence and location of the neutron source and other 4
radioactive materials. They have also been instructed in emergency procedures in the event of a disaster.
l If additional information is required, please address requests to the under-signed.
Sincerely, b
i Darrell Megli Radiation Safety-Officer D:g i
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