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Analysis of the Neutron Source Term of a Spent Fuel Assembly - دانلود رایگان



دانلود رایگان Analysis of the Neutron Source Term of a Spent Fuel Assembly

دانلود رایگان Analysis of the Neutron Source Term of a Spent Fuel Assembly Nuclear safeguards is primarily concerned with the detection of significant quantities of special
nuclear material. Spent nuclear fuel offers a diversion pathway of significant quantities. The
gross neutron signal of spent nuclear fuel could be used to detect signal aberrations caused by
diversions, provided the temporal, enrichment, and environmental components of the signal are
understood and characterized such that these aberrations can be detected and noted. This study
characterizes the neutron source term of a spent fuel assembly for a range of burnups, initial
enrichments, cooling times, and counting environments. The GATORS code package was
written to automate the data transitions between the MCNPX computer code and the nuclear
SOURCES4C code. The relative contribution by source nuclide to the (alpha, n) and
spontaneous fission components of the gross neutron signal for a few selected state points is
presented. The net (subcritical) multiplication of the assembly at a few selected state points is
also presented. Analysis of the variation in the gross neutron signal showed that the fluctuations
are, in several instances, most likely too small to be differentiated, making detection of these
differences difficult using gross neutron techniques alone.


Analysis of the Neutron Source


Spent Fuel Assembly


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EVALUATION OF SPENT FUEL ISOTOPICS, RADIATION SPECTRA ...

cask shielding and heat transfer analysis, the SCALE system ... for evaluation of
nuclide isotopics, radiation spectra, and decay heat of spent fuel assemblies. ...
ORIGEN-S computes time-dependent concentrations and source terms of a large
..... fission and (a,n) neutron source in spent PWR fuel over a 10-year decay time.

shielding analysis of dual purpose casks for spent nuclear fuel ...

2 Apr 2015 ... At first the gamma and neutron flux for the design basis fuel were ... The results
from the source term evaluation were used as input data for the ...

Evaluation of Effect of Fuel Assembly Loading Patterns on Thermal ...

thermal and shielding performance of a cask containing spent nuclear fuel. ....
analysis. Table ES.2 lists the seven source terms used in the shielding analysis.
... of 30 and 60 GWd/MTU fuel bound the neutron dose rates for the other
loadings.

Analysis of the Neutron Source Term of a Spent Fuel Assembly

Analysis of the Neutron Source Term of a Spent Fuel Assembly.

A Review of Spent-Fuel Photon and Neutron Source Spectra

A REVIEW OF SPENT-FUEL PHOTON AND NEUTRON SOURCE SPECTRA. 0.
W. Hermann .... photons and neutrons, it is important to describe these sources in
terms .... shows the photon spectrum of a PWR assembly cooled t o 90 days, as.

Spent Nuclear Fuel Assay Data for Isotopic Validation

specially to the collection and analyses of nuclear fuel assay data should be
initiated, and the ... to update the OECD/NEA web-based nuclear fuel nuclide
composition database SFCOMPO ...... Spent fuel compositions are the basis for
evaluation of radioactivity, neutron and gamma ray source terms and decay heat.

Characterization of the Neutron Source Term and Multiplicity

Characterization of the Neutron Source Term and Multiplicity of a Spent Fuel
Assembly in Support of NDA Safeguards of ..... Net Multiplication Analysis. The
net ...

Characterization of the neutron source term and multiplicity of a ...

The gross neutron signal (GNS) is being considered as part of a fingerprinting or
neutron balance approach to safeguards of spent nuclear fuel (SNF). Because ...

SNF Calculations of Spent Fuel Source Terms for Fuel ... - Studsvik

Efficient analysis of spent fuel source terms is a task of growing ... pool decay
heat calculations using a special decay heat ... Activity Decay heat Neutron
source.

Spent Nuclear Fuel Analyses based on In-Core Fuel ... - Ipen.br

Parameters such as decay heat, neutron source rates and photon spectra of ...
KEYWORDS: Spent nuclear fuel, radiation source terms, decay heat, in-core.

Assessment of the neutron and gamma sources of the spent BWR fuel

at discharge are fuel bundle type, burnup, and in BWR also void fraction. ... A
PPENDIX C Neutron source of spent BWR fuel. 25 ... and source term generation.

SNF source terms including activation of spent fuel assembly's ...

CODES FOR SAFETY ASSESSMENT OF SPENT NUCLEAR FUEL HANDLING
... effective neutron multiplication factor (Кeff) of SNF management systems.

Comparative Analysis of VVER-1000 Westinghouse and TVEL ...

30 Aug 2016 ... Keywords Spent Nuclear Fuel, Operational Conditions,. Isotopic Composition ...
Determination of source terms during analysis of thermal and radiation ... neutron
spectrum in which this burnup took place. The more hard was ...

SIMPLE GEOMEI3_Y DOSE RATE BENCHMARKS FOR SPENT ...

SPENT FUEL CASK ANALYSIS. H. Taniuchi ... both the spent fuel source terms
and the neutron and ... dose-rate analysis of these bare spent fuel assemblies.

Estimation of the radionuclide inventory in LWR spent fuel assembly ...

15 Jan 2016 ... Secondary neutron source modelling using MCNPX and ALEPH codes ... spent
fuel assembly structural materials for long-term safety analysis ... The
radionuclide inventory of materials irradiated in a reactor ... The axial variation of
the neutron flux along the fuel assembly length has also been considered.

Shielding Design of Shipping Cask for 4 PWR Spent Fuel Assemblies

A Shielding analysis of the shipping cask designed conceptually, of which
shielding material are lead and resin, for containing 4 PWR spent fuel
assemblies, has been ... Radiation source terms have been calculated by means
of ORIGEN–2 code ... gamma-ray and neutron dose rates on the cask surface
and 1 m from the ...

Spent Fuel Project Office Interim Staff Guidance - 6 - NRC

Establishing minimum initial enrichment for the bounding design basis fuel ...
applicant calculate the source term on the basis of the fuel that will actually
provide the ... The specification should bound all assemblies proposed for the
casks in the ... or justify the use of a neutron source term, in the shielding analysis
, that.

source term assessment of spent fuel in wet storage - UPB Sci Bull

presence of actinides and fission products in the storage pool would be a clear
indication ... the estimation of the actual state of source term for the spent fuel (EK
-10 and ... Generally, the (gamma, n) neutron source is small in any reactor fuel.

calculation of the dose rate for the spent fuel assembly from vver ...

The dose rate from the spent fuel assembly presented in this paper was ...
assembly. SAS2H computes neutron and gamma source spectrum and ... Key
words: equivalent dose rate, spent fuel assembly, VVER-1000 ... O.W.Herman,
C.V.Parks SAS2H: A Coupled One - Dimensional Depletion and Shielding
Analysis Module,.

Dose Rate Analysis Capability for Actual Spent Fuel Transportation ...

The Used Nuclear Fuel Storage, Transportation & Disposal Analysis ... heat, and
radiation source terms for UNF assemblies exhibiting axial and radial burnup ....
trunnion penetrations through the cask neutron shield, are also described within
...

Neutron and Gamma Ray Source Evaluation of LWR High Burn-up ...

and criticality safety analysis of spent fuel storage facilities such as dry casks and
... ate source term data that can be utilized for source evalua- tion, neutron
emission ... MOX fuel rods, (3) Radial gamma ray source distribution of fuel
pellets of ...

The Swedish Spent Nuclear Fuel Management Programme ... - INMM

22 Jan 2015 ... The Swedish Nuclear Fuel Management ... In-depth review of encapsulation
plant on hold awaiting ..... 244Cm. Dominant neutron source term.

(MOX) Fuel

Nuclear fuel accountancy measurements are conducted at several points through
the ..... of Summer Work: Analysis of the Neutron Source Term of a Spent Fuel.

Analysis of the Neutron Source Term of a Spent Fuel Assembly

Nuclear safeguards is primarily concerned with the detection of significant
quantities of special nuclear material. Spent nuclear fuel offers a diversion
pathway of ...

The Evolution of Safety Related Parameters and their ... - PSAM 12

Abstract: For spent nuclear fuel management in Germany, the concept of dry ...
Furthermore, shielding analyses with regard to varying densities of the integrated
.... rate outside the cask is made up by a source term that consists of neutrons
and.

Standard Review Plan for Transportation Packages for MOX Spent ...

MOX Spent Nuclear Fuel ... irradiated LEU fuel and that from irradiated MOX fuel.
... indicating that applications supported by safety analyses and prepared in
accordance ..... Ratio of MOX to LEU Decay Neutron Emission Rate vs. .....
Depending on the methods used to calculate these source terms, the applicant
may still.

Radioactive Characteristics of the Spent Fuel of the Finnish ... - Posiva

production and radiation (photon and neutron) source terms of the spent fuel as a
function of cooling time ... of the report. Keywords: radioactivity inventory, spent
nuclear fuel .... source term and shielding, depletion and heat transfer analyses.

Annals of Nuclear Energy Open Access Articles - Elsevier

Isogeometric analysis for the multigroup neutron diffusion equation with ...
Evaluation of JRC source term methodology using MAAP5 as a fast-running
crisis .... This paper gives an overview of the new 'Fuel Rod Analysis Toolbox',
which is a ...

Monte Carlo characterization of PWR spent fuel assemblies to ...

The goal is to be able to determine whether some of the assembly fuel pins are ...
to the neutron source term after the spent fuel assemblies are more than two
years ... Further analysis at extremes of high and low enrichment and long and
short ...

Dose rate calculation at transport and storage casks for spent ...

Radiation transport calculation for neutron and gamma radiation, starting inside
... TSCs with spent fuel assemblies. ○ Since ... So safety analyses of TSCs and
interim storage arrays are ... Inventory and Source term calculation for axial
zones.

Download - IGD-TP

Furthermore, many of these spent fuel assemblies exhibit very high burnup. ▫
SNFs (and also HLW) are foreseen for ... of spent fuel for the MIRAM inventory (
long term safety analysis). ➢. Determination of neutron and gamma source terms.
➢.

Nondestructive assay options for spent fuel encapsulation - Svensk ...

5.1.11 Neutron Resonance Transmission Analysis (NRTA). 33 ... facility for spent
nuclear fuel and Encapsulation Plant. CN. Coincident Neutron. CT ..... in Figure 5
-3. The fission products produced by induced fission are the source term for the.

Instructions and a template for IJNS - Web-based IJNS System

22 Sep 2015 ... Keyword: spent nuclear fuel; dry storage cask; source term; radiation shielding;
Monte Carlo ... safety analysis report (SAR) [1], neutron and.

pre-conceptual study on the review framework for the radiation ...

OF THE PWR SPENT FUEL CASK INTERIM STORAGE. IN KOREA ... In the
review procedures, independent analyses for source terms and shielding are
required. To perform ... fuel assemblies, etc. Neutrons and gamma-rays. Materials
...

Evaluation of Shielding Analysis Methods in Spent Fuel Cask ... - EPRI

30 Jun 1995 ... Each cask was loaded with spent fuel assemblies spanning a wide ... the spent
fuel source terms and, second, the neutron and gamma-ray ...

ORIGAMI: A NEW INTERFACE FOR FUEL ASSEMBLY ...

... for further source term analysis (for example, cask loading and dose studies for
... The ORIGAMI interface is not a new nuclear fuel deple- tion code; rather, it is
..... neutron source terms; the total intensities are matched to the depletion zones
...

modelling of radiation field around spent fuel container

types of nuclear fuel are characterised by quite different radiation properties at ...
analysis is required for radiation properties of different nuclear fuel types at ...
cessing of fuel rods and at long-term SNF disposal. ... For example, neutron
source.

Nuclear Reactor Calculations - Springer

The reactor core, plant dynamics, safety analysis and fuel rod analysis are ... The
third term in the RHS of Eq. (2.2), Sex, expresses the external neutron source.

Patent US9423516 - Systems and methods for spent fuel pool ...

23 Aug 2016 ... a neutron source located in the spent fuel pool; ... a signal analyzer to receive
counted signals from the counting device and to determine reactivity of fuel ..... In
terms of the diffusion length, L, Equation 2 can be rewritten as,

radiation analysis of a spent-fuel storage cask - Mechanical and ...

This report describes MCNP calculations of the neutron and gamma-ray doses
rates arising from a single Transnuclear spent-fuel storage cask holding 68
design-basis fuel assemblies (a TN-68 cask). ... 1.3 Cask Source Terms ... fitting/
plenum and the fuel gamma rays, separate source models were used for these
two ...

CANDU RADIOTOXICITY INVENTORIES ESTIMATION – A ...

analysis of the pathways for radionuclides released from used fuel into ground
waters present ... (CANDU) [1, 4]. These calculated inventories can provide the
source-term data .... neutron and gamma sources generated by the fuel assembly
.

Nuclear fuel - Wikipedia

Nuclear fuel is a substance that is used in nuclear power stations to produce heat
to power ... When the unstable nuclei of these atoms are hit by a slow-moving
neutron, ..... It reacts with water, preventing long-term storage of spent fuel under
water. .... fusion fuel as a net energy source remains only a theoretical possibility.

Lead Slowing-Down Spectrometry Time Spectral Analysis for Spent ...

This document is a progress report for FY2011 PNNL analysis and algorithm ....
neutrons for the LANL 64 used PWR fuel assemblies compared with the true
masses read ... long-term fuel storage, and to optimize the efficient transport of
used fuel. ... into the Pb by a pulsed neutron source (e.g. linear accelerator (
LINAC)), ...

Methodology of Fuel Burn Up Fitting in VVER-1000 Reactor Core by ...

neutron source in the reactor core should be used as input data, as it is ... During
analysis of VVER-1000 ex-vessel neutron-activation ... types of fuel assemblies (
TVS-2M) with extended fuel height are used, and on Novovoronezh-5, ... term
operation, the influence of the ex-vessel fluence distributions on the axial burn-up
...

Assessment of the Fingerprinting Method for Spent Fuel Verification ...

Gamma analyses for different spent fuel bundle diversion scenarios were carried
out. It .... A. Gamma and Neutron Radiation Source-term Estimation.

Lattice Characteristics and Activity Analysis of U3SI2 and ... - RERTR

SCALE6 code is used to analyze lattice characteristics and source term analysis
for U3SI2 and. UMo fuels. Among lattice ... which needs careful treatment in the
spent nuclear fuel. Furthermore, neutron and gamma spectra are evaluated at ...

Development of a Safeguards Verification Method and Instrument to ...

16 Oct 2006 ... diversion of nuclear fuel pins from Light Water Reactor (LWR) spent fuel
assemblies. In ... In this article, we describe a concept and ongoing research to
help ... assembly, while the data analysis would be used to help identify ...
Accordingly, the pin-by-pin neutron source strengths were established in the.

A Burnup Credit Methodology for PWR Spent Fuel Storage Pool

In the past, criticality safety analyses for spent fuel storage and transport canisters
...... Table 24: List of fuel nuclides automatically included by SAS2H in neutron ....
for calculation of cross sections and isotopic depletion source terms for fuel.

Nuclear Waste Disposal Crisis

The study involved a probabilistic risk analysis of postulated spent fuel pool acci-
... The NRC's study reported that a spent fuel pool accident involving fuel damage
..... evidence of gaps or significant neutron absorption panel degradation. .....
used the Reg Guide 1.3 source terms in its analyses for SSES and concluded
that.

Spent Fuel Damage: Pool Criticality Accident - All Things Nuclear

26 Apr 2016 ... Spent fuel assemblies reside in metal storage racks within the pools. ... and
upward passed the irradiated fuel assemblies. Fig. 2 (Source: NRC) ... When
workers corrected these deficiencies, the re-analysis ... of the neutron-absorbing
material was missing from some spent fuel pool storage rack locations.

Spent fuel characterization for geological repositories - KTH

6 Oct 2015 ... key aspects of deep geological disposal of spent fuel and long-lived ....
Confidence increase in the safety assessment codes ‐ materials interactions. 7.
... heat, reactivity, gamma- and neutron radiation from the nuclear ..... Accomplish
source term uncertainty calculations for spent nuclear fuel given the latest ...

Radionuclide Source Term for Irradiated Fuel from Prototype ...

This report comprises the source terms for fuel elements from the ... als from
conditioning of spent LWR fuel elements, the tails from uranium enrichment and ...

Download this PDF file - Nuclear Safety Info

9 Sep 2014 ... BURNUP CREDIT IN THE CRITICALITY SAFETY ANALYSIS OF. SPENT ...
Keywords spent nuclear fuel; RBMK-1000; nuclide composi- ... products whіch
absorb neutrons. .... source term calculations, assembly parameters.

International Conference

analysis for any facility containing spent fuel: handling devices, transport cask,
intermediate and final ... specialized for a nuclear fuel transport or storage
container. The Spent ... of the fuel;. - evaluation of the source-term (neutron and
gamma);.

BURNUP CREDIT ANALYSES FOR NUCLEAR CRITICALITY SAFETY

because of exposure to neutron flux, among other things. ... safety analyses, an
assembly-average fuel composition is typi- .... Radiation Source Terms,” Vol.

shielding calculations for an ns-4-fr type spent fuel storage cask ...

and safety assessment involving spent nuclear fuels. Using SCALE4.3 ... Spent
nuclear fuel which is removed from a power or research reactor is one of the
hazardous ... The dose calculations include radial dose and axial dose from fuel
gamma source, fuel neutron source, ... The source term is shown in Table 1. The
cask ...

Download as a PDF - CiteSeerX

7 Sep 1995 ... radiation source terms for spent fuel and subsequently utilized these sources ...
transport analyses (via XSDRNPM) of the reactor fuel assembly using a ... The
fuel neutron flux spectrum obtained from the second (large) unit-.

Advanced Measuring (Instrumentation) Methods for Nuclear - Hindawi

27 Aug 2012 ... This paper is a review of advances in measuring (instrumentation) technology
focus ... to improving their safety and long-term metrological stability [11]. ...
showed the measurement result for miniature neutron source nuclear reactor [13]
. ... The measurement of radiation from a spent nuclear fuel assembly is ...

Download PDF - eScholarship | University of California

26 Sep 2012 ... NRTA – Nuclear Resonance Transmission Analysis. NRF – Nuclear .... For
neutron signal measurements of a spent fuel assembly, there exists a very
intense neutron background ... source terms and detector responses [9].

Lead Slowing-Down Spectrometry Analysis of Data from ...

the isotopic fissile masses in used nuclear fuel assemblies. We present ... term
storage. In earlier work ... of a large stack of high-purity lead, a neutron source,.

Journal of Nuclear Science and Technology Standard keyword list

Please follow the journal's Instructions for Authors when preparing your
manuscript for ... analysis angular distribution annular flow. APR1400 benchmark
beta ray ... electrochemical corrosion potential electrochemistry electron
electrorefining ... sorption source term spent fuel spent fuel transportation cask.
SRAC stability.

the westinghouse pressurized water reactor nuclear power plant

aid to the reader. The term Nuclear Steam Supply System (NSSS) ... Reactor
Startup Neutron Sources. 26. CHAPTER 3 .... Cross Section of Typical Four-Loop
Core (193 Fuel Assemblies). 15. 2-2 .... The primary loop contains the heat
source consisting of a ...... hydraulic design analyses are used to determine the
core ...

Precisely determined the spent nuclear fuel antineutrino flux and ...

23 Dec 2015 ... Spent nuclear fuel (SNF) antineutrino flux is an important source of un- certainties
for a ... Keywords: Antineutrino experiment, Uncertainties analysis, Spent fuel ...
neutron flux variation during the reactor operation. A method to ..... rapid
processing for spent fuel depletion, decay,and source term analysis.

Generic design assessment UK EPR nuclear power plant design by ...

reactor, is to transfer the spent fuel to the spent fuel pool for storage and .... a) TQ-
EPR-123 Information on the longer term used fuel storage facility (HSE) ..... and
power distribution, and for reactor shutdown, and neutron source rods, or in core.

performance and safety analysis of a generic ... - Semantic Scholar

neutron fraction and reactivity coefficients are calculated and shown to be ...
channel analysis showing promising behavior in terms of axial and radial fuel
element ... model spent fuel assembly and one for spent fuel from a
Westinghouse AP1000. ...... radiation source term in the case of a radioactive
release; a safety benefit.

Calculation of the Radionuclides in PWR Spent Fuel Samples for ...

3 Jun 2004 ... (GWd/MTU) spent fuel from H. B. Robinson and the medium burnup 36 .....
calculated PWR spent fuel nuclide inventories and the related gamma ray,
neutron and alpha ... The research purpose for rod R01 is source term
characterization so .... The analysis showed a very long downtime of 559 days (
18.6 ...

RSICC CODE PACKAGE CCC-702 1. NAME AND TITLE ORIGEN

It can be used to solve for spent fuel characterization, isotopic inventory, radiation
... ways: The neutron source and energy spectrum routines were replaced with ...
cross sections for the ORIGEN-S depletion/decay analysis using enrichment, ...
SCALE users can generate their own libraries for other fuel assembly designs.

Delayed Gamma-Ray Assay for Nuclear Safeguards By Vladimir ...

the highly radioactive environment of the spent fuel assemblies and to achieve ...
The delayed gamma-ray assay concept is investigated within this context with the
... response is based on the analysis of integrated count rates and peak ratios. .....
4.2 Schematic of the LINAC-driven low energy photo-neutron source designed.

A computationally simple model for determining the time dependent ...

dependent spectral neutron flux in a nuclear reactor core. E.A. Schneider a ... in
modeling nuclear fuel cycles. The evolving ... analyses done to determine the
effects of different fuel ..... where we have replaced the fission source terms with.

Model analysis of isotopic composition of VVER-440 spent nuclear fuel

Model analysis of isotopic composition of VVER-440 spent nuclear fuel. $ ... other
isotopes, usually highly toxic, through neutron ... timate the source conditions for
radiation analyses. .... to give differences in percentage terms for the con-.

Spent Fuel from Nuclear Power Reactors - International Panel on ...

The mission of the IPFM is to analyze the technical basis for practical and
achievable policy ... long-term storage and disposal of spent fuel from nuclear
power reactors. ... It is widely accepted that spent nuclear fuel, high-level
reprocessing waste and .... 40 hold spent fuel and three store high-level
radioactive waste. Source:.

Robert Bright Mawuko SOGBADJI - TEL (Thèses-en-ligne)

Nyarko, words cannot express my appreciation for all that you have to see me ....
1.2.2 Miniature Neutron Source Reactor (MNSR) . ... 1.3.2 Reprocessing and
Backend of the Nuclear Fuel Cycle . ..... 2.9.2 Method employed for MNSR
Analysis .

Brady Hanson - US Nuclear Waste Technical Review Board

17 Feb 2016 ... High Burnup Fuel, Associated Data Gaps, and Integrated ... DOE Office of
Nuclear Energy, Used Nuclear Fuel Disposition R&D ... Neutron poisons –
Thermal aging ... “Spent fuel radionuclide source-term model for assessing spent
fuel ... Rod Internal Pressure Quantification and Distribution Analysis Using.

Modern new nuclear fuel characteristics and radiation protection ...

Modern new nuclear fuel characteristics and radiation protection aspects. ... and
alpha reaction neutron source terms of these non-irradiated fuel assembly types
by ... Radioisotopes/analysis*; Radiometry/methods*; Risk Assessment/methods*
...

Analysis of the Neutron Source Term of a Spent Fuel Assembly - ژیکو

16 مه 2016 ... Nuclear safeguards is primarily concerned with the detection of significant
quantities of special nuclear material. Spent nuclear fuel offers a ...

Radiation Exposures From Spent Nuclear Fuel and High-Level ...

1,2, 3, 4, 5) have identified three aspects of spent nuclear fuel(SNF) and high-
level ... gamma and neutron radiation levels around the damaged cask, and
possibly ..... For purposes of this analysis, Sandquist's cask design and net
source term ...

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