DOSE PROFILE MODELING OF IDAHO NATIONAL LABORATORY’S ACTIVE NEUTRON INTERROGATION TEST FACILITY

Journal Article · Mon Jun 01 04:00:00 EDT 2009 · APPLIED RADIATION AND ISOTOPES

DOI:https://doi.org/10.1016/j.apradiso.2009.01.002· OSTI ID:960250

Chichester, D L; Seabury, E H; Zabriskie, J M; Wharton, J; Caffrey, A J

A new research and development laboratory has been commissioned at Idaho National Laboratory for performing active neutron interrogation research and development. The facility is designed to provide radiation shielding for DT fusion (14.1 MeV) neutron generators (2 x 108 neutrons per second), DD fusion (2.5 MeV) neutron generators (up to 2 x 106 neutrons per second), and 252Cf spontaneous fission neutron sources (6.7 x 107 neutrons per second, 30 micrograms). Shielding at the laboratory is comprised of modular concrete shield blocks 0.76 m thick with tongue-in-groove features to prevent radiation streaming, arranged into one small and one large test vault. The larger vault is designed to allow operation of the DT generator and has walls 3.8 m tall, an entrance maze, and a fully integrated electrical interlock system; the smaller test vault is designed for 252Cf and DD neutron sources and has walls 1.9 m tall and a simple entrance maze. Both analytical calculations and numerical simulations were used in the design process for the building to assess the performance of the shielding walls and to ensure external dose rates are within required facility limits. Dose rate contour plots have been generated for the facility to visualize the effectiveness of the shield wall and entrance maze and to illustrate the spatial profile of the radiation dose field above the facility and the effects of skyshine around the vaults.

• Research Organization: Idaho National Laboratory (INL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC07-99ID13727
• OSTI ID: 960250
• Report Number(s): INL/JOU-08-14544
• Journal Information: APPLIED RADIATION AND ISOTOPES, Journal Name: APPLIED RADIATION AND ISOTOPES Journal Issue: 6 Vol. 67; ISSN 0969-8043; ISSN ARISEF
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CONCRETES
DESIGN
DOSE RATES
INTERLOCKS
NEUTRON GENERATORS
NEUTRON SOURCES
NEUTRONS
Neutron Generator
PERFORMANCE
RADIATION DOSES
RADIATION STREAMING
RADIATIONS
SHIELDING
SHIELDS
SPONTANEOUS FISSION
Shielding