[Federal Register Volume 64, Number 59 (Monday, March 29, 1999)]
[Notices]
[Page 14952]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 99-7594]



[[Page 14952]]

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NUCLEAR REGULATORY COMMISSION


Radiological Assessments for Clearance of Equipment and Materials 
From Nuclear Facilities

AGENCY: U.S. Nuclear Regulatory Commission.

ACTION: Notice of availability.

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SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is announcing the 
availability for review and comment of a draft staff report, 
Radiological Assessments for Clearance of Equipment and Materials from 
Nuclear Facilities, NUREG-1640. This report provides dose information 
on the hypothetical use or processing of equipment, ferrous metals, 
copper, aluminum, and concrete that has associated radioactivity.

ADDRESSES: Copies of the draft NUREG-1640 may be examined or copied for 
a fee at the NRC Public Document Room, 2120 L Street, NW, Washington, 
DC 20555-0001. NRC documents may be inspected from 7:45am to 4:15pm, 
Monday through Friday, excluding Federal holidays in the lower level of 
the building at the address above.
    Copies of NUREG-1640 may be requested in writing to: Reproduction 
and Distribution Services Section, OCIO, U.S. Nuclear Regulatory 
Commission, Washington, DC 20555-0001 or e-mail: D[email protected].
    The report is also available through the Internet at:

http://www.nrc.gov/NRC/NUREGS/SR1640/V1&2/index.html.

    Comments will be reviewed, resolved as appropriate, and 
incorporated into the final report. Members of the public are invited 
to submit written comments to the Chief, Rules and Directives Branch, 
Division of Administrative Services, U.S. Nuclear Regulatory 
Commission, Washington, DC 20555-0001.

FOR FURTHER INFORMATION: For technical information contact (see 
ADDRESSES section above for directions on obtaining a copy of the 
report): Robert A. Meck, Phone: (301) 415-6205, U.S. Nuclear Regulatory 
Commission, M.S. T-9C24, Washington, DC 20555, e-mail [email protected].

SUPPLEMENTARY INFORMATION: This report calculates realistic estimates 
of the dose factors, for the average member of the critical group, 
potentially associated with the clearance of material and equipment. 
This report is intended to support NRC, which is currently in the 
preliminary stages of considering a rulemaking to set specific 
requirements for clearance, by providing a technical basis for 
evaluating environmental impacts associated with clearance. Realistic 
estimates of dose in this report were calculated using scenarios and 
models with parameters based on current general U.S. industry practice. 
The materials evaluated in the report include iron and steel, copper, 
aluminum, and concrete. Dose factors are expressed in terms of annual 
radiation dose (Sv/y) for each unit of radioactivity (Bq) on a 
unit surface area of equipment or scrap (cm2) or in a unit 
of mass of scrap (g). The report presents the analyses and results of 
79 scenarios to identify the critical group for each of the respective 
materials. The critical group is the group of individuals reasonably 
expected to receive the greatest exposure to residual radioactivity for 
any applicable set of circumstances (10 CFR 20.1003). The analyses were 
performed on a nuclide-by-nuclide basis for the nuclides that would be 
most likely associated with equipment and materials released from 
nuclear facilities. The work was developed and performed under a formal 
quality assurance and quality control program with cooperation and 
consultation from the EPA and the DOE. An independent peer review was 
performed and is reflected in this report. To be most useful, 
information submitted in comments requesting changes in the report 
should provide the technical rationale for the comment and be 
verifiable. The sources of data provided in support of the comment 
should be cited. It would also be useful if comments that suggest the 
use of additional scenarios also estimate the likelihood or frequency 
of scenario occurrence.
    Title: Radiological Assessments for Clearance of Equipment and 
Materials from Nuclear Facilities.

    Dated at Rockville, Maryland, this 23rd day of March, 1999.

    For the Nuclear Regulatory Commission.
John W. Craig,
Director, Division of Regulatory Applications, Office of Nuclear 
Regulatory Research.
[FR Doc. 99-7594 Filed 3-26-99; 8:45 am]
BILLING CODE 7590-01-P