ML20041A931
| ML20041A931 | |
| Person / Time | |
|---|---|
| Site: | 07001359 |
| Issue date: | 01/12/1982 |
| From: | Mertz R IRT CORP. |
| To: | Crow W NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| 20158, NUDOCS 8202230020 | |
| Download: ML20041A931 (4) | |
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Dear Mr. Crow:
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Subject:
Modifications to " Application for Renewal of Special Nuclear Mat ta License SNM 1405", IRT 4171-002
References:
1.
Docket 70-1359; SNM 1405 2.
Telephone conversations between Mrs. B. Kosto of your office and Mr. K. Crosbic of IRT on January 5,1982 and January 8,1982 The review of IRT Corporation's renewal application for SNM License 1405 by your office has resulted in the need to make certain modifications and clarifications. These were brought to our attention via the referenced telephone conversations. The resulting changes are given in a separate attachment.
If you have further questions or require additional information please call Mr. Kay Crosbie at 714-565-7171, Ext. 378.
Yours truly, IRT ORPORATI N M
'L'flM, Robert L. Mertz)
President I
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IR1' Corporation ATTACHMENT Modifications to IRT 4171-001
" Application for Renewal of Special Nuclear Material License SNM 1405" Item 1.
Section 6.1.1, replace paragraph 3 and first sentence in para-graph 4, pp. 29 and 30, with the following:
Except as specifically approved by this license, the limits of 235U (enriched approval for the Committee shall be 500 grams of 233, and 250 grams of plutonium, or l
>5 percent), 250 grams of U
250 gr.ams of combined SNM for laboratory-type operations with matetials in any form.
i The approval limit for use of discrete sealed sources with enrichments up to 5 percent shall be limited to 43 percent of the safe mass limit and 67 percent of dimension limits described in DP-1014, " Critical and Safe Masses and Dimensions of Lattices Rods in Watet".
of U and UO2 Item 2.
Section 6.7.2, paragraph 5d, page 43; I
Change..
10 CFR 70.24 (1) must to read..
10 CFR 70.24 (a) (1) will....
Item 3.
Section 6.7.2, paragraph b, page 44; a)
Change first sentence to read:
Limitations are established on the maximum inventory of SNM allowed at facility with all transfers of SNM into and out of each area being under the control of the Radiation Safety (Accountability) Office.
1 b)
Replace last sentence in the first paragraph of 6a with the following :
Each of the lab and experimental preparation areas will be limited to those same quantities provided that they are separate rooms and are isolated from adjoining areas by one of the following criteria.
1 f
Item 4.
Section 7.2.2; I
I a)
Page 49; insert the following sentence immediately below the heading " Bioassay":
Bioassays will be conducted in accordance with the guide-lines contained in Regulatory Guide 8.11.
b)
Page 50; replace " Exposure Hazard Indices for Gross Alpha Bioassay" table with the following:
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IRT Corporation Exposure Hazard Sample Tyt>ical Index Frequency Situation 5
Weekly Special schedule for individuals whose average bioassay results exceed 4.0 pCi/
day of alpha activity or who worked in an area where the airborne activity is 225% of DAC.
4 Monthly Individuals working in areas where the quarterly airborne alpha activity is 210% of DAC and 525% of DAC.
3 Semiannually Individuals working in areas where the quarterly airborne alpha activity is
$10% of DAC and the maximum used to obtain the average is $25% of DAC.
2 Annually Individuals working in areas where the quarterly airborne alpha activity is 21% of DAC and the maximum used to obtain the average is $10% of DAC.
1 As Needed Individuals who work in potential alpha contaminated areas or following an accidental release of airborne alpha emitters into the work area.
c)
Page 51; replace "Exaosure Hazard Indices for Whole Body Monitoring" table with the following:
Exposure Hazard Sample Typical Index Frequency Situation 3
2 or more Individuals who show continuing or times a recurring evidence of internal contami-year nation.
2 Annually Individuals who routinely work with more than 10 times the MPBB of any unsealed alpha emitter.
1 As Needed Individuals who work with uncontained SNM in an ingestible form.
IRT Corporation
_3-Item 5.
Section 7.3.3.
a)
Page 53; paragraph 4; change to read:
The pre-filters in the chemistry hoods and glove boxes will be changed when there has been a throughput of 1 kg of unsealed SNM through the particular device.
b)
Page 53; paragraph 6, line 7; change 25 percent to ten per-cent.
Item 6.
Section 7.3.4; add the following paragraph:
Air samples are taken in each CAA where unsealed SNM is used with the sample head positioned as near to the workers' breath-ing zone as is practicable. Using the guidelines outlined in Appendix III of this application, the work is conducted in chemistry hoods or glove boxes as is necessary.
As a matter of general practice, all work with powdered or liquid SNM which is in a readily ingestible or respirable form is done in either a hood or glove box. As a result of this policy, air samples taken in the work areas during previous operations have shovn a quarterly average concentration of airborne radioactivity of:
1.1 x 10-13 pCi/cc for all areas, with 1.6 x 10-13 pCi/cc being the highest, and 3.8 x 10-14 pCi/cc being the lowest concentration for individual areas.
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