ML20058N527
| ML20058N527 | |
| Person / Time | |
|---|---|
| Site: | 07000398 |
| Issue date: | 12/10/1993 |
| From: | NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | |
| Shared Package | |
| ML20058N514 | List: |
| References | |
| NUDOCS 9312220096 | |
| Download: ML20058N527 (2) | |
Text
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[t UNITED STATES j
' j NUCLEAR REGULATORY COMMISSION i7 s
WASHINGTON. D.C. 20655 0001
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...o" DEC 101993 DOCKET:
70-398 LICENSEE: U. S. Department of Commerce National Institute of Standards and Technology Gaithersburg, Maryland
SUBJECT:
SAFETY EVALUATION REPORT: APPLICATION DATED NOVEMBER 19, 1992, EMERGENCY RESPONSE PLAN Hackground The National Institute of Standards and Technology (NIST) site covers a 575-acre area located in Montgomery County, Maryland. A complete description of the site and locations of radioactive materials is contained in License SNM-362. Typical laboratory construction consists of reinforced concrete floors with insulated metal partitions or concrete block walls.
Fume hoods exhaust directly to the outside at rooftop level.
Typical work involving unsealed radioactive material includes:
radiotracer studies, preparation of mass spectroscopy of uranium and transuranics samples, handling and packaging of radioactive waste, calibration of customer supplied sources and activation analysis of various materials.
Most uses of radioactive material are limited to microcuries or millicurie quantities.
Section 70.22(i)(1) of Title 10 of the Code of Federal Regulations' requires NIST to either -
(1) perform an evaluation that demonstrates that the maximum dose to a member of the public offsite due to a release of radioactive materials would not exceed I rem effective dose equivalent or an intake of 2 milligrams of soluble uranium, or (2) submit an emergency plan.
By application dated April 7, 1992, NIST chose to submit an evaluation.
As a result of a request for additional information dated May 20, 1992, the licensee provided additional information on July 23, 1992. On September 29, 1992, NIST withdrew the previous documents.
On November 19, 1992, NIST submitted a new evaluation. As a result of a request for additional information dated September 14, 1993, NIST provided additional information on November 4, 1993.
D_iscussion Fire, explosion, or a ruptured uranium hexafluoride cylinder would be the primary events causing potential offsite doses or intakes of soluble uranium to the public.
In projecting and calculating the potential doses to the public, NIST used the following conservative accident conditions:
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Ouality of Radioactive Material License Maximum limit 3
Distance to offsite location 450 meters Release duration 30 minutes.
l Wind speed 1 meter /sec Wind direction constant
.i Atmospheric stability class FJ 3
i X/Q (from Figure 1, NUREG-1140) 3.7x10" se /m 2.66x10" m /sec Breathing Rate Based on the initial dose projection to the public, NIST proposed license procedural modifications to reduce the potential offsite dose to less than that stated'in the regulatory criteria. The staff has audited the licensee's dose calculations and determined that- (1) the calculated dose to the offsite public is correct and conservative. (2) with the proposed. license procedural
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-thanges, the dose to the offsite public is less than 1 rem effect ve equivalent or an intake of 2~ milligrams.of soluble uranium, and (3) rut emergency plan is. required.
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- C3tenorical Exclusion -
l Based on the information submitted by NIST, the staff has determined that.the criteria in 10 CFR 51.22(c)(14) for categorically excluding an action from'an-1 environmental review have been met.
.i lherefore..neither an environmental assessment nor an. environmental impact!
' statement is necessary for this proposed action.
Conclusion / Recommendation.
The' staff concludes that the amendment meets the requirements of 10 CFR' 70.22(i)(1) and can be issued without undue risk'to the workers, public, or 3
the env.ironment. Therefore, approval of the application is recommended.
The Region-1 staff has no objection.to this licensing action.
l Principal Contributors
{
Mike Lamastra
.Sean.Soong Mary Adams
]
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