Yield and PDV Measurements of the Godiva-IV Critical Assembly
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Nevada National Security Site (NNSS), Santa Barbara, CA (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
A high dynamic range, scinillator based detector, the MHD-240, was used to measure the gamma and neutron flux of several prompt critical bursts of the Godiva-IV assembly. The measurements provided the alpha and FWHM for several different burst temperatures. Calibrations of the MHD240 gamma and neutron sensitivity along with MCNP based simulation of the Godiva-IV assembly allowed us to also determine the total fission yield of the burst integrated over approximately 5 ms. In addition a Photo Doppler Velocimetry measurement was conducted to determine the surface motion vibrational frequency of Godiva-IV assembly during the bursts. The combined data were collected to be used as input to multi-physics simulation of the Godiva-IV assembly. This is a preliminary report, there is an ongoing effort to update the MCNP simulations used in the analysis and develop a correction for the room return component of the measured signal.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Mission Support and Test Services, LLC (MSTS), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- AC52-07NA27344; 89233218CNA000001; NA0003624
- OSTI ID:
- 1822613
- Report Number(s):
- LLNL-TR-826595; 1041107; TRN: US2301704
- Country of Publication:
- United States
- Language:
- English
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