-
81.发明授权Method and apparatus for nuclear fuel assay with a neutron source and coincident fission neutron detectors 失效具有中子源和中性离子中子检测器的核燃料测定方法和装置
公开(公告)号：US3786256A
公开(公告)日：1974-01-15
申请号：US3786256D
申请日：1971-11-18
Applicant: NAT NUCLEAR CORP
Inventor： UNTERMYER S
Abstract: A method and apparatus for the non-destructive assay of nuclear reactor fuels. Neutron irradiation of the fuel emits fission neutrons and gammas in groups of two to three neutrons and about five gammas for each fission and these neutrons and gammas are detected in a coincident counting system to obtain a quantitative assay of the fissionable species in the fuel. The proportions of various fissile isotopes in a fuel sample are also detected by coincident counting at a plurality of coincidence levels.
Abstract translation: 用于核反应堆燃料的非破坏性测定的方法和装置。 燃料的中子照射发射两个到三个中子的分裂中子和伽马，每个裂变发射约五个伽马，在一致的计数系统中检测到这些中子和伽马，以获得燃料中可裂变物种的定量测定。 燃料样品中各种裂变同位素的比例也可以通过在多个重合水平的重合计数来检测。
-
公开(公告)号：US3602713A
公开(公告)日：1971-08-31
申请号：US3602713D
申请日：1970-07-08
Applicant: KASTNER JACOB , BILLIE G OLTMAN , YEHUDA FEIGE
Inventor： KASTNER JACOB , OLTMAN BILLIE G , FEIGE YEHUDA
Abstract: A passive moisture meter measures the number of thermal neutrons present in a material as a result of natural radiation, such as cosmic rays, to determine the moisture content of the material. The thermal neutron flux in a control region of known moisture content is also measured to determine the magnitude of the highenergy neutron flux developed by the natural radiation.
-
83.发明授权Mass flow rate measuring utilizing the scattering cross section of a material for fast neutrons 失效质量流量测量利用快速中子材料的散射交叉部分
公开(公告)号：US3577158A
公开(公告)日：1971-05-04
申请号：US3577158D
申请日：1969-01-07
Applicant: INDUSTRIAL NUCLEONICS CORP
Inventor： HAHN LINUS K
CPC classification number: G01N23/09 , G01F1/7042 , G01F1/78 , G01T3/00
Abstract: Measuring mass flow rate of a fluid material having a high scattering cross section for fast high energy neutrons by radiating the material with such neutrons which are slowed to lower energy thermal neutrons and detecting the thermal neutrons downstream to effect a determination therefrom of the mass flow rate. For a more accurate determination of the mass flow rate, a second thermal neutron detector downstream has its output compared to the first detector output. Further, a gamma source and detector is employed to derive the density of the material and to obtain the velocity thereof by division of the mass flow by the density.
-
84.发明授权Method and apparatus for the accurate analysis of hydrocarbon material using a multiple of radiation sources 失效使用多个辐射源对碳氢化合物材料进行精确分析的方法和装置
公开(公告)号：US3508047A
公开(公告)日：1970-04-21
申请号：US3508047D
申请日：1966-05-25
Applicant: GULF RESEARCH DEVELOPMENT CO
Inventor： MOTT WILLIAM E , RHODES DONALD F
-
85.发明授权Method and apparatus for the examination of samples of nuclear fuel or whole fuel elements without destruction thereof 失效检查核燃料样品或全部燃料元素样品的方法和装置，无破坏
公开(公告)号：US3496357A
公开(公告)日：1970-02-17
申请号：US3496357D
申请日：1965-11-09
Applicant: OESTERR STUDIEN ATOMENERGIE
Inventor： WEINZIERL PETER , PUTZ FRANZ
CPC classification number: G21C17/063 , G01N23/09 , G21C17/06
-
Patent Agency Ranking86.发明授权
公开(公告)号：US3463920A
公开(公告)日：1969-08-26
申请号：US3463920D
申请日：1965-08-31
Applicant: SIMMONDS PRECISION PRODUCTS
Inventor： KRAUSHAAR ROBERT J
CPC classification number: G01N23/09 , F17C13/028 , F17C2201/0119 , F17C2221/017 , F17C2223/0161 , F17C2223/033 , F17C2250/0421 , F17C2250/0426 , F17C2250/0439 , F17C2250/0495 , F17C2260/026 , F17C2270/0194
-
公开(公告)号：US3350564A
公开(公告)日：1967-10-31
申请号：US42083964
申请日：1964-12-23
Applicant: BONILLA CHARLES F , SHA WILLIAM T
Inventor： BONILLA CHARLES F , SHA WILLIAM T
IPC: G01N23/09 , G21C17/038
CPC classification number: G21C17/038 , G01N23/09
-
公开(公告)号：US3100840A
公开(公告)日：1963-08-13
申请号：US72820258
申请日：1958-04-14
Applicant: NUCLEAR CORP OF AMERICA INC
Inventor： MORGANSTERN KENNARD H
IPC: G01N23/09
CPC classification number: G01N23/09
-
89.发明授权
公开(公告)号：US3018374A
公开(公告)日：1962-01-23
申请号：US75006958
申请日：1958-07-18
Applicant: FLOYD V RICHARDSON
Inventor： PRITCHETT RAY A
IPC: G01N23/09
CPC classification number: G01N23/09
-
公开(公告)号：US2989662A
公开(公告)日：1961-06-20
申请号：US77373558
申请日：1958-11-13
Applicant: FAIRCHILD CAMERA INSTR CO
Inventor： LINDEN BERNARD R
CPC classification number: H01J31/49 , G01N23/09 , H01J29/458 , Y10S315/07
-
-
-
-
-
-
-
-
-
Search Results
165
records
(took 0.011 seconds)
