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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Quad Cities violations lead to NRC confirmatory order
The Nuclear Regulatory Commission has sent a confirmatory order to Constellation Energy Generation outlining the agreed-on actions to address apparent violations of agency requirements at Quad Cities nuclear power plant in Cordova, Ill. The corrective and preventive actions are based on a June neutral party–mediated alternative dispute resolution (ADR) session that had been requested by Constellation to help it and agency decide on steps forward.
Toshihiko Ohnuki, Tadao Tanaka, Hiromichi Ogawa, Tadatoshi Yamamoto
Nuclear Technology | Volume 88 | Number 1 | October 1989 | Pages 55-63
Technical Paper | Radioactive Waste Management | doi.org/10.13182/NT89-A34336
Articles are hosted by Taylor and Francis Online.
The relationship of the retardation factor of a radionuclide for undisturbed soil and that for disturbed soil has been investigated. The migration model is based on the assumption that both reactive (dynamic) and nonreactive (stagnant) sites exist in the soil column. The retardation factor for undisturbed soil is represented by the following equation:Rfu = Su/SdRfd ,where Rfu and Rfd are retardation factors for undisturbed and disturbed soil, respectively, and Su and Sd are degrees of water saturation in undisturbed and disturbed soils, respectively. The migration experiments for both the undisturbed and disturbed soil columns were carried out using 85Sr. The average retardation factor for the undisturbed soil is smaller than that for disturbed soil, and the degree of water saturation in the undisturbed soil column is smaller than that in the disturbed soil column. The retardation factor for the undisturbed soil estimated, based on the above equation, is approximately the same as the measured retardation factor for the undisturbed soil.
