ML20032B718
| ML20032B718 | |
| Person / Time | |
|---|---|
| Site: | 07000359 |
| Issue date: | 10/20/1981 |
| From: | Durkosh E PITTSBURGH, UNIV. OF, PITTSBURGH, PA |
| To: | NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| 19841, NUDOCS 8111060198 | |
| Download: ML20032B718 (6) | |
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RADIATION SAFETY OFFICE
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Director of Nuclear Material x'
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Safety and Safeguards U. S. Nuclear Regulatory Commission
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Washington, D.C.
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Subject:
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Dear Sir:
d The following information is submitted in support of our reques'3,:'(\\
S for extension of SNM-336 which expires November 30, 1981.
The statements are presented in response to the information requested in the applicab'e sub-sections of 10 CFR 70.22, and in the order listed.
- a. (1) l'niversity of Pittsburgh Radiation Safety Office A-550 Crabtree Hall, GSPH Pittsburgh, PA 15261
- a. (2) SNM material used for teaching, research, instrument calibrations and check sources.
- a. (3) Application for license extension is requested for as long a time possible consistent with Regulatory policy.
- a. (4) Maximum possession limits:
Plutonium 239:
256 grams as encapsulated PuBe sources 20 milligrams in miscellaneous forms Plutonium 238:
1 milligram as calibration sources Uranium 233 5 milligrams in miscellaneous forn's Uranium 235 10 grams in miscellaneous forms
- a. (5) Not applicable
- a. (6)
SNM sources are used by various qualified faculty members under the authorization of the University Radiation Safety Committee.
011106019s a11020 DR ADOCK 07000359 N. Wald, M.D.:
Chairperson C
PDR D. Gur, ScD. : Vice-Chairperson
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ROOM A-550 CRADTREE HALL, F'.TTSBURGH. PA. I."261 (412) 624-272 B. 2729
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w U. S. Nuclear Regulatory Commission Page 2.
October 19, 1981 E. D. Durkosh, C.H.P. : University Radiation Safety Officer J. Rosen, C.H.P.
- Presbyterian University Hospital Radiation safcty Officer; Director, Low-Level Counting Laboratory; Senior Faculty Member.
39
- a. (7) The 256 grams of PuBe sources consist of two (2) 5-Curie sealed sources and six (6) 1-Curie sealed sources.
One 5-Curie PuBe source and a 1-Curie source are stored or used in the Physics Department for instrument calibration, and student labs or demonstration.
The 5-Curie source is controlled by Dr. Juerg Saladin, Ph.D.; The 1-Curie source is managed by Dr. Dincer Gunduz, Ph.D.
The sources are normally kept in shielded cylindrical container drums marked with appropriate radiation signs.
The 5-Curie source is stored in a locked, shielded container in the Van De Graaff (Nuclear Physics Lab) target room.
This room has restricted access.
The 1-Curie source is normally kept in a locked cylindrical shielded container in a storage room.
The remaining five-Curie PuBe source is stored in the Radiation Safety Office Calibration Room, G-33 in the basement of Parran Hall, GSPH.
This Howitzer source was confiscated by the Radiation Safety Office after the departure of Dr. R. L. Wolke from the Chemistry Department.
Currently, no use for this source is contemplated, i
A group of five 1-Curie sources are stored in a shielded drum container in the Radiation Safety Office / Radiation Health Department Calibration Room, G-33, Parran Hall.
These are under the control of the Radiation Safety Officer (E. D. Durkosh) and the Professor of Health Physics (David Gur).
These sources are used for instrument calibration, Health Physics lab courses, and, occasionally, for graduate student research projects.
The calibration room is kept locked at all times; The access key is controlled by the Radiation Safety Office. This accounts for the 256 grams (16 Curies) of sealed PuBe sources held under this licens'e.
The possession limits for the remaining SNM are intended to 238 u, 239Pu, 2330 and 235U low-level sources of P
cover miscellaneous size', quantity and configuration.
These are used as calibration and check sources for various nuclear counting devices in the Radiation Health and Radiation Safety Departmen ts.
All these sources are controlled by D. Gur, J. Rosen or E. D. Durkosh.
Such sources may be used for teaching labs and/or deconstrations.
Our possession limits for these materials sl;ghtly exceed our present inventory, reflecting our need to' cover quantities which may be potentially increased.
In order to provide accurate in-vivo dosimetry on personnel brought into our whole body counting i
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.U. 5. Nuclear Regulatory Commission Page 3.
October 19, 1981 facility, who may contain burdens of various enrichments and combinations of SNM, our inventory may be increased slightly to accommodate new calibration material on a case-by-case basis.
In such cases, facilities sending workers for in-vivo analysis may transfer minute quantities of SNM equivalent in activity and composition to the posential organ or body deposition.
Such calibration standards typically range in sub-milligram quantities for plutonium isotopes, and 1-2 milligram levels for SNM uranics.
239 Please note that the possession limit requested' for Pu as miscellaneous forms has been lowered from that submitted in previous license rene sal applications.
The lower limit results from transfer of some 239Pu from the University.
239 u oxide powder, has been recently Sixteen (16.0) mg of P
dispatched to the D.0.E. Facility in Oak Ridge National Laboratory.
This material had been ordered by Dr. Thomas Rozzell; It was never used or opened and was returned in its original shipping container.
The pertinent shipment information for this material is in Appendix A*.
A small grouping of miscellaneous form SNM has been collected from several researchers in the University who no longer require this material.
This category includes 239 u, 2330 P
and 235U sources, now in storage in the Radiacion Safety Office Calibration Room, G-33, Parran Hall. Access to this locked storage is only by Radiation Safety Office personnel.
The remaining SNM (239Pu) is in the form of several cuunting standards and sliding strip Eberline check sources.
The total nominal activity of this material is less than 10 pCi.
- a. (8)
Based on our licensed possession limits, there is no eme.rgency potential or immenent da.nger to life or property from accidental criticality or equivalently hi h releases
~ t of radioactivity associated with storage and ph aaed use of SNM. The Radiation Safety Office utilizes a routine surveillance program which includes monitoring, surveying, leak testing, labelling, etc.
As required by 10 CFR 19, 20, 70, 71 and the University's Radiation Safety Committee Safety Manual of Regulations Regarding The Safe 'Use Of Sources Of-Ionizing Radiation.
This manual, with revisions, has been i
submitted to the NRC for various license requests, including that for teletherapy and broad by-product licenses.
Al though developed primarily for the broad by-product license, it governs the administration and safe use of all radioactive material.
(* Appendix A:
Contains copy of DOE /NRC Form 741)
U. S. Naclear Regulatory Commission Page 4.
October 19, 1981 Appendix B lists monitoring instruments and personnel monitoring services in use.
Because PRC-licensed shippers may no longer send quantities of transuranic radioisotopes or SNM above exempt concentrations to burial sites, waste disposal by contract shipment is currently not contempl ated.
Conceivably, quantities of SNM at or below exempt concentrations could be disposed from the low-level counting laboratory: This material would be deposited in barrels containing long-lived by-product waste material.
239 With respect to the other SNM sources, the encapsulated PuBe sources are leak tested at six (6)-month intervals.
They are surveyed as part of our routine surveillance program for all types of radioactive material in our possession.
The remaining SNM sources are kept in sealed paint cans, vials, planchet holders of other cufiguration in specific areas:
Accountability is relatively easy and precise. These locations are also included in our routine surveillance program.
The potential for radioactive release has been and remains minimal; sources are controlled by several of our responsible and Radiation Safety-oriented professionals.
Subsections 70.22 (b) through (k) are not applicable, and require no response.
If additional information is needed to extend the expiration date (November 30, 1981) of this license, please contact this office.
Sincerely,
$bt uAd E. D. Durkosh Radiation Safety Officer RKB/ cam cc:
Region I, U.S. Nuclear Regulatory Commission Office of Inspection / Enforcement 631 Park Avenue King of Prussia, PA 19406
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APPENDIX A 00E/NRC FORM 741
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(.UTHOrttZED. t e 33143 53438 95 91 NUCLEAR MATERIAL TRANSACTION REPORT saso:2s omos BV 10 CF R 20. 40. 50. 70.
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APPENDIX B Survey instruments and available personnel dosimetry services at University of Pittsburgh.
Survey Instruments Al pha :
Eberline Pac-46 and Pac-3 Neutron: Victoreen 488 Beta, Gamma: Victoreen 440, 470A, 471A ion chambers; Ludlum Model 11 G-M with thin-window and NaI probes.
Johnson GSM with Tungsten-shielded thin window proce.
Air Sampling: MSA Model S portable pumps (6)
GE high-volume pump (1)
Staples high-volume pump (1)
Personnel Monitoring Pocket Chambers: Assorted Bendix and Landsverk low energy (0-200 mR) dosimeters.
Digi-dose (0-5000 mR) dosimeters TLD:
R. S. Landauer, Jr. & Company M-1 TLD badge with neutron-detection capa bility.
Internal Proportional Counting Nuclear-Chicago 4330 gas flow automatic counting systems (2)
Calibration Standards 239 5
Al pha :
Pu sources (4), 316 to 3.C0x10 c/ min. (21) 17 Gamma:
Cs Irradiator source (19.. ci as of 5/30/73, source Tungsten-748).
ORa needle (9.9 +.7% mg as of 11/11/71, NBS #47428)'.
239 Neutron : 5 1-Curie Monsanto PuBe sources Nos. M-633 through M-637.
6 With neutron emission rates of 1.77 through 1.89x10 n/sec.
as of 8/22/62.
Used f or Victorcen 488 calibration.
In-Vivo Counting: University of Pittsburgh Low-level Radiation Counting Facility, located in Presbyterian-University Hospital lobby.
Bioassay: Available from Low-Level Counting Facility.
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