Measurement of the fast neutron albedo dose for different shields

Trykov, L.A.; Goryachev, I. V.; Kukhtevich, V. I.

doi:10.1007/bf01885917

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…The water around the floating platform absorbs neutrons better than the soil of the free-field, because neutrons are decelerated by the high amount of hydrogen in the water very effectively. Already in the 60s a similar effect was observed [8]: When the backscattering of fast reactor neutrons from soil and water is compared, the dose rate above a water surface is much lower (by a factor of 0.4, if the angle of incidence is 0˚). The results of the cited article cannot be compared with the measured ratio of 0.55 directly, because the cosmic neutron spectrum is different from a reactor spectrum.…”

Section: General Remarksmentioning

confidence: 62%

Long-term PTB intercomparison of passive H*(10) dosemeters used in area monitoring

Dombrowski

Neumaier

2012

J. Inst.

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This intercomparison serves to investigate the long-term behaviour of passive (or similarly used active) H*(10) dosemeters which are dedicated to the monitoring of the surroundings of nuclear plants and accelerators and used in the radiation field of the natural ambient radiation. From autumn 2005 to spring 2007, approx. 650 photon and neutron dosemeters were exposed to environmental radiation at three dosimetric reference sites, operated by the Physikalisch-Technische Bundesanstalt (PTB). In addition to the measurements under natural conditions a number of dosemeters was also subjected to an additional irradiation in PTB photon and neutron fields. Ten measuring bodies and institutions, which are involved in ambient monitoring in Germany, Austria and Switzerland, took part in this intercomparison. The intercomparison revealed the typical precision to be expected from long-term dose measurements in the natural environment. The difference of the response of the dosemeters to terrestrial and to cosmic radiation was determined. From the results of this intercomparison some sources of uncertainty were identified and some recommendations to improve area monitoring were derived.

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Section: General Remarksmentioning

confidence: 62%

Long-term PTB intercomparison of passive H*(10) dosemeters used in area monitoring

Dombrowski

Neumaier

2012

J. Inst.

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METHODS AND DATA FOR REACTOR SHIELD CALCULATIONS**Research sponsored by the U.S. Atomic Energy Commission under contract with the Union Carbide Corporation.

Clark

1969

Advances in Nuclear Science and Technology

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Measurements of Backscattered Neutrons and Secondary Gamma-Rays from Stainless Steel and Limestone Concrete for 14-MeV Source Neutrons

Shin¹,

Nishimura²,

Yamamoto³

et al. 1988

Journal of Nuclear Science and Technology

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Simultaneous measurements of fast neutron and prompt r-ray albedos were performed by nominal 14-MeV neutrons for the type 304 SS and the limestone concrete. Both neutrons and r-rays were detected by an NE-213 scintillator with the aid of the n-r discrimination circuit.The time-of-flight method was used to obtain neutron spectra, whereas the unfolding method was applied to analyze r-ray pulse-height data of the scintillator. The measured data were compared with those calculated by the MCNP code with the ENDF/8-IV data.The calculation reproduced the measured secondary r-ray differential albedo data well for both materials. For neutrons, apparent disagreement was seen in the albedo data of the 304 SS between the calculation and the experiment. This was due to some inaccuracies in the chromium cross sections in the ENDF /8-IV. The agreement of the neutron data was better for the limestone concrete than for the 304 SS.

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Measurement of the fast neutron albedo dose for different shields

Cited by 4 publications

References 2 publications

Long-term PTB intercomparison of passive H*(10) dosemeters used in area monitoring

Long-term PTB intercomparison of passive H*(10) dosemeters used in area monitoring

METHODS AND DATA FOR REACTOR SHIELD CALCULATIONS**Research sponsored by the U.S. Atomic Energy Commission under contract with the Union Carbide Corporation.

Measurements of Backscattered Neutrons and Secondary Gamma-Rays from Stainless Steel and Limestone Concrete for 14-MeV Source Neutrons

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