Gamma neutron assay method and apparatus
Patent
·
OSTI ID:6893296
The gamma neutron assay technique is an alternative method to standard safeguards techniques for the identification and assaying of special nuclear materials in a field or laboratory environment, as a tool for dismantlement and destruction of nuclear weapons, and to determine the isotopic ratios for a blend-down program on uranium. It is capable of determining the isotopic ratios of fissionable material from the spontaneous or induced fission of a sample to within approximately 0.5%. This is based upon the prompt coincidence relationships that occur in the fission process and the proton conservation and quasi-conservation of nuclear mass (A) that exists between the two fission fragments. The system is used in both passive (without an external neutron source) and active (with an external neutron source) mode. The apparatus consists of an array of neutron and gamma-ray detectors electronically connected to determine coincident events. The method can also be used to assay radioactive waste which contains fissile material, even in the presence of a high background radiation field. 7 figures.
- DOE Contract Number:
- AC07-76ID01570
- Assignee:
- EG G Idaho, Inc., Idaho Falls, ID (United States)
- Patent Number(s):
- A; US 5378895
- Application Number:
- PPN: US 8-149874
- OSTI ID:
- 6893296
- Country of Publication:
- United States
- Language:
- English
Similar Records
Gamma neutron assay method and apparatus
Multi-Detector Analysis System for Spent Nuclear Fuel Characterization
Preliminary Simulations for Geometric Optimization of a High-Energy Delayed Gamma Spectrometer for Direct Assay of Pu in Spent Nuclear Fuel
Patent
·
Sat Dec 31 23:00:00 EST 1994
·
OSTI ID:869690
Multi-Detector Analysis System for Spent Nuclear Fuel Characterization
Conference
·
Wed Sep 01 00:00:00 EDT 1999
·
OSTI ID:910871
Preliminary Simulations for Geometric Optimization of a High-Energy Delayed Gamma Spectrometer for Direct Assay of Pu in Spent Nuclear Fuel
Conference
·
Thu Jun 07 00:00:00 EDT 2012
·
OSTI ID:1092037
Related Subjects
052000 -- Nuclear Fuels-- Waste Management
055001* -- Nuclear Fuels-- Safeguards
Inspection
& Accountability-- Technical Aspects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101 -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
COINCIDENCE METHODS
COUNTING TECHNIQUES
DETECTION
FISSIONABLE MATERIALS
GAMMA DETECTION
MANAGEMENT
MATERIALS
MEASURING INSTRUMENTS
NEUTRON DETECTORS
NUCLEAR MATERIALS MANAGEMENT
NUCLEAR WEAPONS DISMANTLEMENT
RADIATION DETECTION
RADIATION DETECTORS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
RADIOASSAY
SAFEGUARDS
WASTES
055001* -- Nuclear Fuels-- Safeguards
Inspection
& Accountability-- Technical Aspects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101 -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
COINCIDENCE METHODS
COUNTING TECHNIQUES
DETECTION
FISSIONABLE MATERIALS
GAMMA DETECTION
MANAGEMENT
MATERIALS
MEASURING INSTRUMENTS
NEUTRON DETECTORS
NUCLEAR MATERIALS MANAGEMENT
NUCLEAR WEAPONS DISMANTLEMENT
RADIATION DETECTION
RADIATION DETECTORS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
RADIOASSAY
SAFEGUARDS
WASTES