Neutron Nuclear Data Evaluation for Thorium-232

2018-6-12  KEYWORDS: thorium 232, nuclear data evaluation, Statistical model, total cross sections, elastic scattering, inelastic scattering, radiative capture, fission, resonance parameters, comparative evaluations, 0-20 MeV range I. INTRODUCTION The need for optimum utilization of non-renewable energy sources, such as uranium,

Evaluation of the thorium-232 capture resonance integral

ed. Publication Date: Wed Jan 01 00:00:00 EST 1975 Research Org.: CEN, Saclay, France OSTI Identifier: 4139363 Report Number(s): NEANDC(E)-163U; CONF-740526-

thorium 232 evaluation cardstocongress

Although thorium (90 Th) has 6 naturally occurring isotopes, none of these isotopes are stable; however, one isotope, 232 Th, is relatively stable, with a half-life of 1.405×10 10 years, considerably longer than the age of the Earth, and even slightly longer than the generally accepted age of the universe.

(PDF) Evaluation of thorium-232 distribution at Kirtland

Evaluation of thorium-232 distribution at Kirtland Air Force Base, Defense Nuclear Weapons School, Training Site 4 US Army Eng Res and Development Center, Vicksburg, MS

(PDF) Benchmarking of thorium-232 evaluations against

Benchmarking of thorium-232 evaluations against spherical transmission and (n,xn) reaction experimental data

Evaluated Nuclear Data for Nuclides within the Thorium

2010-5-21  The nuclides of primary interest for evaluation relevant to the thorium–uranium (Th–U) fuel cycle are 232Th, 231,233Pa and 232,233,234,236U. Historically, production of complete evaluated data files for important nuclides was primarily the domain of laboratories with long traditions in nuclear data evaluation. The evaluation efforts were

Evaluation of elemental concentrations of uranium,

2019-9-1  Sample analysis was carried out after the parent uranium and thorium and their respective decay products, i.e. 238 U (226 Ra, 214 Pb, 214 Bi) and 232 Th (212 Pb, 212 Bi, 228 Ac, 208 Ti) achieved a state of secular equilibrium, which has a theoretical radioactivity ratio of 1.0 for nuclides belonging to the same natural decay chains. Results from these samples are shown in Fig. 3; the

5. Summary of Data Reported and Evaluation

2001-4-5  Thorium-232 (232 Th) and its decay products, administered intravenously as a colloidal dispersion of 232 ThO 2, are carcinogenic to humans (Group 1). Plutonium-239 (239 Pu) is carcinogenic to humans (Group 1). In making this overall evaluation, the Working Group noted that human exposure to 239 Pu may also include exposure to 240 Pu.

REMOVAL SITE EVALUATION THORIUM STORAGE

2006-8-2  from the thorium through an efficient solvent extraction process. The returned thorium contained only a minor fraction of the uranium-232 and 233. Most of this material is stored in Building 68. The thorium has been consolidated from other production areas, including material from the Plant 8 silo and bins, and is now stored in appropriate

energy innovation EVALUATION OF THORIUM BASED

april 1995 ecn-r--95-006 ksoo1922941 r: fi de008071448 evaluation of thorium based nuclear fuel extended summary wap. franken j.h. bultman r.ja konings

DOE Review Release 05/22 CDC

2018-10-2  Page 1 of 26 . DOE Review Release 05/22/2017 . Evaluation of Method for Assessment of Thorium-232 Exposures at the Savannah River Site from 1972 to 1989

Economic evaluation of thorium oxide production from

2021-7-1  Thorium (232 Th) as a fertile isotope with thermal neutron capture in the reactors transmutes to a fissile 233 U nucleus, as expressed in Eq. (1) . The fissile 233 U forms a new nuclear fuel, obtained either as a fission product during nuclear reaction or may be removed chemically from spent fuel, then forms a new nuclear fuel [ 3 ].

5. Summary of Data Reported and Evaluation

2001-4-5  Thorium-232 (232 Th) and its decay products, administered intravenously as a colloidal dispersion of 232 ThO 2, are carcinogenic to humans (Group 1). Plutonium-239 (239 Pu) is carcinogenic to humans (Group 1). In making this overall evaluation, the Working Group noted that human exposure to 239 Pu may also include exposure to 240 Pu.

THORIUM-232 THE LESS KNOWN DECAY CHAIN

2014-11-19  THORIUM-232 THE LESS KNOWN DECAY CHAIN Issues with internal emitters EU Scientific Seminar, Luxembourg. November, 23rd 2010 Serena Risica, Francesco Bochicchio and Cristina Nuccetelli Istituto Superiore di Sanità (National Institute of Health) Rome, Italy

Uranium ( 234 U, 238 U) and thorium ( 230 Th, 232 Th) in

The study showed the species accumulated uranium (234 U, 238 U) and thorium (230Th, 232 Th) form soil to some degree but the calculated values of the bioconcentration factor were below 1. The evaluation showed that Leccinum and Leccinellum mushrooms can contribute to annual effective radiation dose maximally at about 0.9 μSv.

Safety Evaluation Report for Unrestricted Release Work

2020-1-3  thorium-232 (Th-232) and thorium-228 (Th-228), plus thorium-230 (Th-230) from the uranium series. Because of the length of time the residual radioactivity has remained onsite (approximately 40 years), the NRC staff concludes it is reasonable to assume that the thorium series is

REMOVAL SITE EVALUATION THORIUM STORAGE

2006-8-2  from the thorium through an efficient solvent extraction process. The returned thorium contained only a minor fraction of the uranium-232 and 233. Most of this material is stored in Building 68. The thorium has been consolidated from other production areas, including material from the Plant 8 silo and bins, and is now stored in appropriate

DEPARTMENT OF THE AIR FORCE INSTALLATION

2019-12-29  value. The soil sample had a thorium-232 concentration of 16.5 pCi/g. Further evaluation of the area surrounding the sample location failed to identify any elevated gamma activity. All soil samples were 5-point composites collected within a 3-ft diameter circle, around the sample location. The area factor of 3.65 for 1-m 2 area was used by the

RADIOLOGICAL EVALUATION OF DECONTAMINATION

THORIUM DECAY SERIES Parent --. *- Thorium-232 Radium-228 Actinium-228 Thorium-228 Radium-224 Radon-220 Polonium-216 Lead-212 Bismuth-212 IThallium-208 I Polonium-212 Half-Life 14 billon years 5.8 years 6.13 hours 1.91 years 3.64 days 55 seconds .I5 seconds 10.6 hour 60.6 minutes 3.1 minutes .0000003 seconds

Uranium and thorium resources: Evaluation and

2012-10-25  Uranium and thorium resources: Evaluation and reporting issues Other 25 232 993 Unknown 4 6 658 Total 1413 26825168 Total 26 825 168 tU from ~75 countries Need to keep track of thorium, which has no market today but can be used for 1000s of years in to future.

THORIUM-232 THE LESS KNOWN DECAY CHAIN

2014-11-19  THORIUM-232 THE LESS KNOWN DECAY CHAIN Issues with internal emitters EU Scientific Seminar, Luxembourg. November, 23rd 2010 Serena Risica, Francesco Bochicchio and Cristina Nuccetelli Istituto Superiore di Sanità (National Institute of Health) Rome, Italy

Uranium ( 234 U, 238 U) and thorium ( 230 Th, 232 Th) in

The study showed the species accumulated uranium (234 U, 238 U) and thorium (230Th, 232 Th) form soil to some degree but the calculated values of the bioconcentration factor were below 1. The evaluation showed that Leccinum and Leccinellum mushrooms can contribute to annual effective radiation dose maximally at about 0.9 μSv.

Safety Evaluation Report for Unrestricted Release Work

2020-1-3  thorium-232 (Th-232) and thorium-228 (Th-228), plus thorium-230 (Th-230) from the uranium series. Because of the length of time the residual radioactivity has remained onsite (approximately 40 years), the NRC staff concludes it is reasonable to assume that the thorium series is

Evaluation of annual committed effective doses to

Uranium ( 238 U) and thorium ( 232 Th) concentrations were measured in different foods widely consumed in Morocco by using CR-39 and LR-115 type II solid state nuclear track detectors (SSNTDs). Annual committed effective doses due to 238 U and 232 Th intakes from the ingestion of the studied food materials were evaluated for different age groups of individuals, using the ICRP ingestion dose

DEPARTMENT OF THE AIR FORCE INSTALLATION

2019-12-29  value. The soil sample had a thorium-232 concentration of 16.5 pCi/g. Further evaluation of the area surrounding the sample location failed to identify any elevated gamma activity. All soil samples were 5-point composites collected within a 3-ft diameter circle, around the sample location. The area factor of 3.65 for 1-m 2 area was used by the

RADIOLOGICAL EVALUATION OF DECONTAMINATION

THORIUM DECAY SERIES Parent --. *- Thorium-232 Radium-228 Actinium-228 Thorium-228 Radium-224 Radon-220 Polonium-216 Lead-212 Bismuth-212 IThallium-208 I Polonium-212 Half-Life 14 billon years 5.8 years 6.13 hours 1.91 years 3.64 days 55 seconds .I5 seconds 10.6 hour 60.6 minutes 3.1 minutes .0000003 seconds

Uranium and thorium resources: Evaluation and

2012-10-25  Uranium and thorium resources: Evaluation and reporting issues Other 25 232 993 Unknown 4 6 658 Total 1413 26825168 Total 26 825 168 tU from ~75 countries Need to keep track of thorium, which has no market today but can be used for 1000s of years in to future.

Le réacteur au thorium : une nouvelle impasse

2021-9-15  Le thorium, ou thorium 232 , est un métal lourd radioactif qui appartient à la même famille chimique (actinides) que l’uranium et le plutonium. Souvent associé aux terres rares, utilisées dans les nouvelles technologies, il est présent en petites

MacSphere: Comparative Safety Evaluation of Thorium

2017-5-19  This thesis focuses on a safety evaluation of thorium fuel compared to NU fuel in a lattice cell and full core configuration. \\ DRAGON 3.06 and SERPENT 2 are used to examine the infinite lattice cell containing NU and homogeneous thorium fuel enriched with 2.0\% U-235, emphasizing the relationship between multiple nuclear libraries.

IARC(国际癌症研究机构)_百度百科 Baidu Baike

2006-11-29  Thorium-232 and its decay products, administered intravenously as a colloidal dispersion of thorium-232 dioxide (Vol. 78; 2001) evaluation upgraded from 2B to 2A with supporting evidence from other relevant data) Cyclopenta[cd]pyrene [27208-37-3] (Vol. 32