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Sunday, May 3, 2020 | History

2 edition of Calculated, two-dimensional dose rates from a PWR fuel assembly found in the catalog.

Calculated, two-dimensional dose rates from a PWR fuel assembly

A. G Croff

Calculated, two-dimensional dose rates from a PWR fuel assembly

  • 31 Want to read
  • 15 Currently reading

Published by Dept. of Energy, Oak Ridge National Laboratory, for sale by the National Technical Information Service] in Oak Ridge, Tenn, [Springfield, Va .
Written in English

    Subjects:
  • Pressurized water reactors,
  • Nuclear fuel elements, Effect of radiation on,
  • Radiation dosimetry

  • Edition Notes

    StatementA. G. Croff, O. W. Hermann, Computer Sciences Division, C. W. Alexander
    SeriesORNL/TM ; 6754
    ContributionsHermann, O. W., joint author, Alexander, C. W. joint author, Oak Ridge National Laboratory, Union Carbide Corporation. Computer Sciences Division
    The Physical Object
    Paginationv, 27 p. :
    Number of Pages27
    ID Numbers
    Open LibraryOL14881821M

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Calculated, two-dimensional dose rates from a PWR fuel assembly by A. G Croff Download PDF EPUB FB2

@article{osti_, Calculated = {Calculated, two-dimensional dose rates from a PWR fuel assembly}, author = {Croff, A.G. and Hermann, O.W.

and Alexander, C.W.}, abstractNote = {The report describes the physical characteristics of a PWR fuel assembly. A model of the assembly is then defined, and a two-dimensional gamma-ray shielding code is applied to the model to calculate two-dimensional dose rates from a PWR fuel assembly book dose rate.

Get this from a library. Calculated, two-dimensional dose rates from a PWR fuel assembly. [A G Croff; O W Hermann; C W Alexander; Oak Ridge National Laboratory.; Union Carbide Corporation.

Computer Sciences Division.]. @article{osti_, title = {Radiation dose rates from commercial PWR and Two-dimensional dose rates from a PWR fuel assembly book spent fuel elements}, author = {Willingham, C E}, abstractNote = {Data on measurements of gamma dose rates from commercial reactor spent fuel were collected, and documented calculated gamma dose rates were reviewed.

As part of this study, the gamma dose rate from spent fuel was. Especially at regions above the concrete cask, the dose rates calculated by SAS4 are 24% in average higher than the MCNP results.

The dose rate profile at the side surface of the Calculated as shown in Fig. 4b reveals the relative intensities of the hardware gamma-ray sources at LEF, effective fuel region, PLM and UEF.

There are peaks at the top and bottom portions, about a factor of 6 higher Cited by: 5. pressurized-water reactor assembly The Westinghouse PWR core contains assemblies with the fuel rods arranged on a 17 x 17 grid.

A diagram of the Westinghouse assembly is. THE CALCULATION OF TOTAL FUEL COSTS FOR PWR Discount rate 5% 0%, 2%, 8%, 10%, two-dimensional dose rates from a PWR fuel assembly book & 15% Uranium credit 70% of the cost The fuel cycle costs for the reprocessing scenario two-dimensional dose rates from a PWR fuel assembly book the reference PWR were calculated using the reference assumptions and unit prices as shown in Tables andrespectively.

Calculated, in reality the majority of the commercially operated fuel – PWR and BWR - is discharged with burn-up of 40 to 45 GWd/t. This holds for Europe as well for the US, as shown in figure 1 [1] and figure 2 [2].File Size: 1MB.

Geometry Square 17x17 matrix Fuel assembly dimension Square x mm Composition per assembly Total: Fuel: Control rod guide thimble: 24 Instrumentation thimble: 1 Fuel material UO2 (U,U,Oxygen) Cladding material Zircaloy-4 weight % zirconium with % tin, % iron, % chromium, and % hafnium Gap filler Helium.

Pressurized Water Reactor vendors differ slightly in their designs and operations. In the Westinghouse (page ) and Combustion Engineering (page ) designs, the steam/water mixture passes through multiple stages of moisture separation.

One stage causes the mixture to spin, which slings the water to the outside. The maximum gamma dose rate on the outer surface of the IVO canister designed to contain 11 VVER fuel assemblies is about mSv/h, when the discharge bumup of the spent fuel is 42 MWd/kgU and the cooling time 20 Size: KB.

The continuous method means continuously increasing the flow rate from 3 m two-dimensional dose rates from a PWR fuel assembly book to m/min within 2 minutes. The discrete method means a step by step increasing of the flow rate with a increment of m3/min. The vibration tests were measured for approximately 2 minutes, holding the flow rate condition [4].

The fuel assembly constitute the base element of the nuclear reactor core. The reactor core (PWR type) contains about fuel assemblies (depending on a reactor type). Western PWRs use a square lattice arrangement and assemblies are characterized by the number of rods they contain, typically, 17×17 in current designs.

The measured isotopic compositions of fuel samples taken from high-burnup spent PWR MOX and UO 2 assemblies in the MALIBU program has been analyzed by lattice physics codes. The measured isotopes were U, Np, Pu, Am, and Cm isotopes and about 30 Cited by: 4.

After that, a calculation of dose rates for the cask surface, performed in accordance with the NUREG dose rates evaluation, should also include a dose rate versus distance curve for a theoretical cask array. The theoretical cask array should consist of at least 20 storage casks (typically in a 2×10 array), Cited by: 6.

PWRs and some others. During recent years fuel performance in water-cooled power reactors has improved significantly since most early problems have been solved. Fuel failure rates are now at a low level (fuel failure has remained a very important issue for NPP operation and Size: 4MB.

The specifications for the PWR assembly calculations are taken from reference [5]. The 18x PWR assembly consists of square lattice fuel rods and 24 water holes. Figure 7 shows the assembly geometry. Due to symmetry only one quarter of the assembly was calculated.

The volume ratio of moderator to fuel in the fuel rods is Vm/Vf = 1, TheFile Size: KB. Fuel Assembly Calculations Using the Method of Discrete Ordinates Article (PDF Available) in Nuclear science and engineering: the journal of the American Nuclear Society (2).

completely unshielded fuel assembly for an hour will be mSv. That’s about one-third of 2Nuclear Waste Managment Organization, Used Fuel Repository Conceptual Design, Canadian NWMO Pre-Project Report TR, December, 3Cro, A, Hermann, C., Alexander, C., Calculated Two-Dimensional Dose Rates from a PWR Assembly.

power distribution within fuel assemblies to compare different techniques for fine flux prediction in Table O (in fuel) reaction rates in UO 2 Table Fission rates in the fission chamber in UO 2 assembly (position [18,1]). prototypical PWR fuel assembly where Inconel spacer grids are used at top and bottom due to the materials high strength and corrosion resistance, while Zircaloy spacer grid are used in the intermediary because of its better neutron economy [12].File Size: 7MB.

In-core fuel inventory = MTHM Hence we can calculate: • Energy output per batch, E b, (at steady state) • Mass of fuel (as heavy metal), P, per batch • Discharge burnup of spent fuel, B d (MWDth/MTHM)File Size: 2MB.

radiochemical assay measurements of pressurized-water-reactor (PWR) fuel samples [2, 3]. This results from the nature of PWR assembly designs, which have historically tended to be relatively uniform and amenable to simple 1-D approximations.

Boiling-water-reactor (BWR) assemblies have long been a challenge for 1-D modelingFile Size: 5MB. Abstract—High-resolution gamma-spectrometry (HRGS) has been used for monitoring burn-up of VVER spent fuel assemblies.

The objective is to. For a fuel assembly irradiated continuously for days at a constant fuel assembly power (P), the heat (H) load power per assembly, days after irradiation is Watts (1) This expression for the heat load is the integral 5 of the above energy rates over the irradiation time, assuming MeV per U fission, and for the fuel assembly power in watts.

Part A Calculating average and reactive power Calculate the average (P) and reactive (2) power for the circuit element below. Consider, v cos(t Vand i(t) cos(t +45°) A Enter a numerical with three significant figures. i(t) ELEMENT v(f) Q- reset help VAR. the spent fuel.

Dose rates inches from the cask surface and doses 1-m above grade out to m are reported. For the far-field dose rates, the skyshine dose rate components are separated from the total dose rates.

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Here you'll find current best sellers in books, new releases in books, deals in books, Kindle eBooks, Audible audiobooks, and. pressurized-water reactor assembly The Westinghouse PWR core contains assemblies with the fuel rods arranged on a 17 x 17 grid. A diagram of the Westinghouse assembly is Cited by: 3.

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