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Title: In-Situ Radiological Surveys to Address Nuclear Criticality Safety Requirements During Remediation Activities at the Shallow Land Disposal Area, Armstrong County, Pennsylvania - 12268

Abstract

Cabrera Services Inc. (CABRERA) is the remedial contractor for the Shallow Land Disposal Area (SLDA) Site in Armstrong County Pennsylvania, a United States (US) Army Corps of Engineers - Buffalo District (USACE) contract. The remediation is being completed under the USACE's Formerly Utilized Sites Remedial Action Program (FUSRAP) which was established to identify, investigate, and clean up or control sites previously used by the Atomic Energy Commission (AEC) and its predecessor, the Manhattan Engineer District (MED). As part of the management of the FUSRAP, the USACE is overseeing investigation and remediation of radiological contamination at the SLDA Site in accordance with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), 42 US Code (USC), Section 9601 et. seq, as amended and, the National Oil and Hazardous Substance Pollution Contingency Plan (NCP), Title 40 of the Code of Federal Regulations (CFR) Section 300.430(f) (2). The objective of this project is to clean up radioactive waste at SLDA. The radioactive waste contains special nuclear material (SNM), primarily U-235, in 10 burial trenches, Cabrera duties include processing, packaging and transporting the waste to an offsite disposal facility in accordance with the selected remedial alternative as defined in the Final Record of Decision (USACE,more » 2007). Of particular importance during the remediation is the need to address nuclear criticality safety (NCS) controls for the safe exhumation and management of waste containing fissile materials. The partnership between Cabrera Services, Inc. and Measutronics Corporation led to the development of a valuable survey tool and operating procedure that are essential components of the SLDA Criticality Safety and Material Control and Accountability programs. Using proven existing technologies in the design and manufacture of the Mobile Survey Cart, the continued deployment of the Cart will allow for an efficient and reliable methodology to allow for the safe exhumation of the Special Nuclear Material in existing SLDA trenches. (authors)« less

Authors:
; ; ;  [1];  [2]
  1. Cabrera Services (United States)
  2. Nuclear Safety Associates (United States)
Publication Date:
Research Org.:
WM Symposia, 1628 E. Southern Avenue, Suite 9-332, Tempe, AZ 85282 (United States)
OSTI Identifier:
22293549
Report Number(s):
INIS-US-14-WM-12268
TRN: US14V1205115073
Resource Type:
Conference
Resource Relation:
Conference: WM2012: Waste Management 2012 conference on improving the future in waste management, Phoenix, AZ (United States), 26 Feb - 1 Mar 2012; Other Information: Country of input: France
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; CONTROL; CRITICALITY; FISSILE MATERIALS; NUCLEAR MATERIALS MANAGEMENT; PERSONNEL MANAGEMENT; RADIOACTIVE WASTES; REMEDIAL ACTION; SAFETY

Citation Formats

Norris, Phillip, Mihalo, Mark, Eberlin, John, Lambert, Mike, and Matthews, Brian. In-Situ Radiological Surveys to Address Nuclear Criticality Safety Requirements During Remediation Activities at the Shallow Land Disposal Area, Armstrong County, Pennsylvania - 12268. United States: N. p., 2012. Web.
Norris, Phillip, Mihalo, Mark, Eberlin, John, Lambert, Mike, & Matthews, Brian. In-Situ Radiological Surveys to Address Nuclear Criticality Safety Requirements During Remediation Activities at the Shallow Land Disposal Area, Armstrong County, Pennsylvania - 12268. United States.
Norris, Phillip, Mihalo, Mark, Eberlin, John, Lambert, Mike, and Matthews, Brian. 2012. "In-Situ Radiological Surveys to Address Nuclear Criticality Safety Requirements During Remediation Activities at the Shallow Land Disposal Area, Armstrong County, Pennsylvania - 12268". United States. doi:.
@article{osti_22293549,
title = {In-Situ Radiological Surveys to Address Nuclear Criticality Safety Requirements During Remediation Activities at the Shallow Land Disposal Area, Armstrong County, Pennsylvania - 12268},
author = {Norris, Phillip and Mihalo, Mark and Eberlin, John and Lambert, Mike and Matthews, Brian},
abstractNote = {Cabrera Services Inc. (CABRERA) is the remedial contractor for the Shallow Land Disposal Area (SLDA) Site in Armstrong County Pennsylvania, a United States (US) Army Corps of Engineers - Buffalo District (USACE) contract. The remediation is being completed under the USACE's Formerly Utilized Sites Remedial Action Program (FUSRAP) which was established to identify, investigate, and clean up or control sites previously used by the Atomic Energy Commission (AEC) and its predecessor, the Manhattan Engineer District (MED). As part of the management of the FUSRAP, the USACE is overseeing investigation and remediation of radiological contamination at the SLDA Site in accordance with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), 42 US Code (USC), Section 9601 et. seq, as amended and, the National Oil and Hazardous Substance Pollution Contingency Plan (NCP), Title 40 of the Code of Federal Regulations (CFR) Section 300.430(f) (2). The objective of this project is to clean up radioactive waste at SLDA. The radioactive waste contains special nuclear material (SNM), primarily U-235, in 10 burial trenches, Cabrera duties include processing, packaging and transporting the waste to an offsite disposal facility in accordance with the selected remedial alternative as defined in the Final Record of Decision (USACE, 2007). Of particular importance during the remediation is the need to address nuclear criticality safety (NCS) controls for the safe exhumation and management of waste containing fissile materials. The partnership between Cabrera Services, Inc. and Measutronics Corporation led to the development of a valuable survey tool and operating procedure that are essential components of the SLDA Criticality Safety and Material Control and Accountability programs. Using proven existing technologies in the design and manufacture of the Mobile Survey Cart, the continued deployment of the Cart will allow for an efficient and reliable methodology to allow for the safe exhumation of the Special Nuclear Material in existing SLDA trenches. (authors)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2012,
month = 7
}

Conference:
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  • This document is a compilation of 13 papers presented at the Low-Level Waste Symposium on Site Suitability Requirements, the questions and answer periods following individual papers, and the panel discussions at the end of each day. The goal of the symposium was to provide a forum for experts in a variety of fields representing a variety of organizations. These experts were given the opportunity to comment on the reasonableness and appropriateness of those portions of the proposed 10 CFR Part 61 that deal with site suitability. The following questions were to be addressed by the speakers and considered during discussionmore » periods: (1) Can sites be found that meet the proposed criteria. (2) Would such sites be safe and effective sites. (3) Do the criteria eliminate safe and effective sites. (4) Can it be shown that a given site meets the proposed criteria. (5) Should the proposed criteria be revised. (6) Should other criteria on site suitability be added.« less
  • Available in abstract form only. Full text of publication follows: The remediation of radioactively contaminated land is a small but growing sector in the area of decommissioning of nuclear facilities. This also includes the material from buildings after demolition. Contamination comprises in general alpha and beta activities and emission of alpha, beta and gamma radiation. The measurement is in practice restricted to the measurement of gamma emission, because of the high penetration of material by gamma rays. All isotopes, which do not emit gammas are estimated on the basis of given relation between alpha and beta emitters without gamma radiationmore » and emitters with gamma radiation. This method is called 'key nuclide method'. Whilst many studies have been completed, others still continue in the processing of large volumes of concrete, steel and soil. An important conclusion from these and similar research programs is that a significant proportion of the waste contains only low concentrations of radioactive nuclides. Therefore, much of the material from the remediation can be considered for 'free release'. It was often not possible to attain adequate specific information on these materials, so a measurement system is needed for their classification and characterization. NUKEM Technologies has practical experience in characterising and remediating of nuclear sites. Recently, it has pioneered the use of innovative in-situ and ex-situ characterisation and waste segregation technologies, which enhance the efficiency of remedial actions and provide assurance to customers, regulators and the public that all significant contamination has been removed and sites can be used for new purposes. (authors)« less
  • At the Parks site, Western Pennsylvania, a geophysical survey was undertaken to determine the size and location of buried trenches containing radiological waste. Several geophysical techniques were used to non-intrusively locate the trench boundaries. The trenches outlines could be mapped from surface conductivity profiles. Magnetometer surveys identified much of the ferrous material buried within the trenches, and further defined the location of the trenches. Several vintages of ground penetrating radar were used, with the need for low frequency antenna demonstrated by testing. A 50 MHz GPR antenna was elected for a series of profiles across the trenches. By integrating interpretationsmore » from the total magnetic field, magnetic gradients, conductivity data and radar profiles it was possible to provide an accurate map of the trenches verified by subsequent drilling. Seismic and microgravity techniques were not able to verify the location of mine workings beneath the area of investigation.« less
  • The PRESTO-II (Prediction of Radiation Effects from Shallow Trench Operations) computer code has been applied for the following sites; Koteyli, Balikesir and Kozakli, Nevsehir in Turkey. This site selection was based partially on the need to consider a variety of hydrologic and climatic situations, and partially on the availability of data. The results obtained for the operational low-level waste disposal site at Barnwell, South Carolina, are presented for comparison. 6 refs., 2 figs., 1 tab.
  • The subsurface migration of radionuclides has been studied at a commercial, shallow-land burial site of low-level nuclear waste at Maxey Flats, Kentucky. A variety of radionuclides including /sup 3/H, /sup 238/ /sup 239/ /sup 240/Pu, /sup 60/Co, /sup 137/Cs and /sup 90/Sr have migrated short distances on-site (meters to tens of meters). A number of the mobile radionuclides, notably plutonium and /sup 60/Co, appear to exist as anionic species with organic properties. As a result, we have studied the organic geochemistry of radioactive leachates pumped from a number of waste burial trenches throughout the site. The major aim of themore » organic research is to elucidate the role of organic compounds in mediating the subsurface migration of the mobile radionuclides in groundwater. A survey study of the hydrophilic and hydrophobic organic content of the waste leachates has revealed that organic compounds are readily leached from the buried waste. Organic chelating agents like EDTA, HEDTA and ED3A are the major hydrophilic organic compounds in the leachates, their concentrations ranging from 78 ppB to 19,511 ppB. A number of carboxylic acids are also present in the leachates, ranging from 675 ppB to 8757 ppB, collectively. A variety of hydrophobic organic compounds including barbiturates and other aromatic compounds, presumably waste-derived, are also present in the leachates, generally at lower ppB concentrations. A detailed chemical speciation study, aimed at determining whether any of the organic compounds identified in the survey study are associated with the mobile radionuclides, was undertaken using leachate from one of the waste trenches. It is clear that EDTA is chelated to plutonium and /sup 60/Co in the leachate, potentially mobilizing these radionuclides. Other radionuclides, /sup 137/Cs and /sup 90/Sr, may be associated with polar organic compounds such as carboxylic acids. 14 references, 2 figures, 2 tables.« less