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NRC looks to leverage previous approvals for large LWRs
During this time of resurging interest in nuclear power, many conversations have centered on one fundamental problem: Electricity is needed now, but nuclear projects (in recent decades) have taken many years to get permitted and built.
In the past few years, a bevy of new strategies have been pursued to fix this problem. Workforce programs that seek to laterally transition skilled people from other industries, plans to reuse the transmission infrastructure at shuttered coal sites, efforts to restart plants like Palisades or Duane Arnold, new reactor designs that build on the legacy of research done in the early days of atomic power—all of these plans share a common throughline: leveraging work already done instead of starting over from square one to get new plants designed and built.
H. H. Hummel, W. M. Stacey, Jr.
Nuclear Science and Engineering | Volume 54 | Number 1 | May 1974 | Pages 35-46
Technical Paper | doi.org/10.13182/NSE74-A23391
Articles are hosted by Taylor and Francis Online.
A study of the sensitivity of the integral properties of the plutonium-fueled fast-reactor critical assembly ZPR-6, Assembly 7 to uncertainties in the nuclear data has been performed with the aid of the VARI-1D variational sensitivity code; ENDF/B Version III was taken as a reference nuclear data base. The effect of 10% cross-section changes, which were correlated over the entire energy range, was analyzed, and allowed data uncertainties compatible with given uncertainties in integral parameters were established. Estimated uncertainties in important cross sections were considered, and the effect of different assumptions of the correlation in energy of the data uncertainties was examined. The effect of data changes among ENDF/B Versions I, II, and III was also analyzed. The most important data uncertainties are in the fission cross section of 239Pu and in the capture cross section of 238U, while the most important uncertainties in integral properties are in sodium void effect, breeding ratio, and keff. (The Doppler coefficient was not studied in the present work.)
