Summary report of the SLAC neutronHP workshopKOI, Tatsumi

2

New and Future Development (Tue. 09:30-12:00)

ParticleHP and Interpolation Scheme

Adding break up reaction to HP

Status and feature development of GND, GIDI and

G4LEND

Development of Fission Fragment Generator

July 2014 Status of particle_hp 3

What is particle_hp?

neutron_hp package uses evaluated nuclear data bases for neutron interactions: Total cross sections Inelastic channel cross sections Double differential spectra of outgoing particles Gamma emission because of nuclear level transitions

particle_hp: do the same for (inelastic) interactions of other particles (p, d, t, He3, )

Inelastic interactions of p/d/t/He3/ particles E < 200 MeV

neutron_hp/particle_hp: interpolation of double differential cross sections

Lawrence Livermore National Laboratory LLNL-PRES-xxxxxx6

GND• New “nuclear” data structure to replace ENDF-6 format

— ENDF atomic data also

GIDI• Transport code API for reading and sampling GND

data

FUDGE• Infrastructure for reading, viewing, modifying, checking,

processing and writing GND data

Outline

Lawrence Livermore National Laboratory LLNL-PRES-xxxxxx7

Written in C• will probably convert to C++ in the next few years

GEANT4 wrappers written in C++• Interface called G4LEND

— Low Energy Nuclear Data (LEND)

Needs several LLNL libraries• PoPs (Property of Particles)• statusMessageReporter• numericalFunctions

GIDI code languages

FISSION EVENT GENERATION

FISSION SAMPLING 8

• Goal: single event perspective

• Accurately reproduce single fission event

• Maintain overall fission statistics

• Conservation

• Mass

• Momentum

• Energy

9

Performance Improvement (Tue. 13:30-15:00)

Performance improvement of neutronHP by simplified

Doppler broadening

Advanced applications of neutron simulation and data

formats

10Geant4 Tutorial Cource

13

Conservation (Tue. 15:00-17:00)

Introduction of conservation problem on data driven models

14

Validation of gammas emission from neutron captured by Nitrogen nucleus

0.0E+00 2.0E+06 4.0E+06 6.0E+06 8.0E+06 1.0E+07 1.2E+070

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

DataENDF/B VII.r1HPHP w/o adjustmentPhoton Evaporation

energy [eV]

IIn

ten

sity

p

er

cap

ture

per

10k

eV

bin

Data: G. E. THOMAS et al., NIM 56, pp325-337 (1967)

15

Biasing (Wed. 08:30-10:00)

Review of Geant4 biasing

16Geant4 Tutorial Cource

18

Nuclear Devices (Wed. 10:30-11:30)

G4-STORK: Stochastic Calculations of Reactor Kinetics

Accuracy and speed of the HP models

19Geant4 Tutorial Cource

20Geant4 Tutorial Cource

22Geant4 Tutorial Cource

24

Data preparation and documentation (Wed. 11:30-12:00,Lunch Break, 13:30-15:00)

CIEMAT data preparation for IAEA

See later slide

LLNL data preparation and international GND project

See later slide

Documentation of data format

Prepare documentation of cross section part

Full documentation needs huge efforts

Possibility to use conversion tools for providing

information

UI commands for setting environment variables of HP

Lawrence Livermore National Laboratory LLNL-PRES-65671326

LLNL proposed this collaboration in order to promote GND (or something based on it) as the new standard

Entitled ‘Beyond the ENDF format: a modern nuclear database structure.’

Resources:• https://www.oecd-nea.org/science/wpec/sg38/• https://ndclx4.bnl.gov/gf/project/sg38/

International collaboration (WPEC SG38) has been formed to design a new format for storing nuclear data, and to oversee the transition from ENDF-6 to the new format.

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ReadyTalk

Audio

Use phone connection rather than PC

Toll free numbers are available for most countries

Web Application

Chat to specified person sometime useful

Every video from web-cam has same display size

Slide Share

Only chair person controls slides

Converting slides takes a long time

Only one set of slides can handle per session

Recording

Sound quality is surprisingly good and slides are also showing

Available from https://indico.cern.ch/event/319884/material/0/

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Thank you very much for all physical and remote

participants!!

I wish to have next round meeting soon!