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RADIONUCLIDES
Poster Session
Scientific
Base of Remediation Technology of Radioactive Sludge and
Scale from Oil and Gas Condensate Production and
Processing
E.I Krapivsky, V.O
Nekoutchaev, V.N. Rygakov
Russian Academy of Natural
Sciences and Enterprise "Severgasprom" have
developed the remediation technology of radioactive sludge
and scale from oil and gas condensate production and
processing. The basic purpose of developed technology is
the reduction of quantity of sludges with elevated
radioactivity stored at the area of oil and gas-condensate
enterprise.
Have been developed:
- Theoretical and
methodical bases for the control of processes of
radioactive sludge decontamination;
- New detectors of alfa-,
beta- and gamma radiation, the techniques for
measurement of specific activity of radium
disintegration products;
- The ways of
transformation of insoluble radium minerals to soluble
form;
Have been investigated:
1. The geochemistry of
radium behaviour in ground waters at petroleum and gas
condensate deposits of the northern regions of Russia;
2. The influence of
processes of precipitation, dissolution, deemanation,
sorption, thermal and high-temperature processing on
decontamination of the large volumes of sludge.
It has been proved, that as
result of decontamination of sludge with specific
radioactivity up to 100 kBq/kg he solid insoluble final
product can have activity no more than 1,5 kBq/kg, and
liquid final product – less than 5 Bq/l.
Applying
Federal Radiological Guidance for Remediation of a
Mixed-Waste Site
William D. Lilley C.P.G., Blasland, Bouck & Lee,
Inc. engineers & scientists.
The purpose of this paper is to demonstrate how the
federal Multi-Agency Radiation Survey and Site
Investigation Manual (MARSSIM) can be applied to a
mixed-waste site (radium, hazardous and nonhazardous)
investigation and remediation program during the final
remediation stage without delaying the project. This paper
will describe the activities necessary to obtain state
approval for the remediation plan in compliance with
MARSSIM guidance. Specific issues are associated with
applying this multi-staged MARSSIM approach at the final
remediation stage of the project, rather than at the
beginning investigation stage. By determining as early as
possible how to apply MARSSIM during the remediation
stage, potential problems can be avoided, and the project
schedule can be maintained. The MARSSIM was issued in
December 1997 to provide detailed federal guidance for
conducting radiological assessments that "demonstrate
compliance with a dose-or-risk based regulation." The
guidance outlines the stages for compliance, starting with
planning the site investigation and continuing through the
final site closure survey following remediation. The
purpose of the MARSSIM guidance is to provide a
"roadmap" through the multi-staged approach from
the beginning of the project to the end. The investigation
and remediation of a mixed waste site in New Jersey will
be presented as an example of successful application of
MARSSIM to a mixed waste site.
Development
of Criteria to Evaluate Indoor Radon Potential in East
Coast Homes
Douglas G. Mose and George W. Mushrush, Chemistry
Department, George Mason University
Based on homesite surveys in @1500 homes tested for
indoor radon in the lowest level of the homes, homes with
basements have @50% greater indoor radon measurements than
homes without basements. Homes with concrete block
basement walls have @10% greater radon measurements than
homes with poured concrete basement walls. Homes with
electrical heating systems have @20% greater radon
measurements than homes with oil or gas heating systems.
Small homes (e.g. 1-2 bedroom) homes with water wells have
greater indoor radon measurements because Appalachian
water wells often have 10 times the US-EPA's recommended
maximum of 300 pCi/L for potable water. Using soil-radon
or indoor radon measurements, geologically defined areas
under homes can be characterized as having low-, medium-
or high-radon potential, where high-radon areas have @25%
greater indoor radon measurements. Similar low-, medium
and high-potential areas can be defined using
airplane-collected radioactivity (aeroradioactivity)
measurements.
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