Yield and PDV Measurements of the Godiva-IV Critical Assembly (Preliminary Report)
- 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 will allow us to also determine the total fission yield of the burst integrated over approximately 5 ms. Work is ongoing to check the calibrations of the MHD-240, and improve the MCNP simulations. This is a preliminary report, and the fission yields reported here are not final and are likely inaccurate. The measured alpha and FWHM are not impacted by the calibration issues and are considered final.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1829974
- Report Number(s):
- LLNL-TR-827927; 1042776
- Country of Publication:
- United States
- Language:
- English
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