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Author: Ronald Allen Knief Publisher: American Nuclear Society ISBN: Category : Technology & Engineering Languages : en Pages : 256
Book Description
Nuclear criticality safety is the prevention of nuclear chain reactions in fissile materials outside of reactors. This book presents the underlying principles of nuclear criticality safety theory along with descriptions of the principal methods currently used and their in-plant applications. Exercises are provided at the end of each chapter to increase understanding of the text.
Author: Ronald Allen Knief Publisher: American Nuclear Society ISBN: Category : Technology & Engineering Languages : en Pages : 256
Book Description
Nuclear criticality safety is the prevention of nuclear chain reactions in fissile materials outside of reactors. This book presents the underlying principles of nuclear criticality safety theory along with descriptions of the principal methods currently used and their in-plant applications. Exercises are provided at the end of each chapter to increase understanding of the text.
Author: Publisher: ISBN: Category : Languages : en Pages : 33
Book Description
Martin Marietta Energy Systems, Inc. (MMES) is committed to performing and documenting safety analyses for facilities it manages for the Department of Energy (DOE). Safety analyses are performed to identify hazards and potential accidents; to analyze the adequacy of measures taken to eliminate, control, or mitigate hazards; and to evaluate potential accidents and determine associated risks. Safety Analysis Reports (SARs) are prepared to document the safety analysis to ensure facilities can be operated safely and in accordance with regulations. Many of the facilities requiring a SAR process fissionable material creating the potential for a nuclear criticality accident. MMES has long had a nuclear criticality safety program that provides the technical support to fissionable material operations to ensure the safe processing and storage of fissionable materials. The guiding philosophy of the program has always been the application of the double-contingency principle, which states: {open_quotes}process designs shall incorporate sufficient factors of safety to require at least two unlikely, independent, and concurrent changes in process conditions before a criticality accident is possible.{close_quotes} At Energy Systems analyses have generally been maintained to document that no single normal or abnormal operating conditions that could reasonably be expected to occur can cause a nuclear criticality accident. This application guide provides a summary description of the MMES Nuclear Criticality Safety Program and the MMES Criticality Accident Alarm System requirements for inclusion in facility SARs. The guide also suggests a way to incorporate the analyses conducted pursuant to the double-contingency principle into the SAR. The prime objective is to minimize duplicative effort between the NCSA process and the SAR process and yet adequately describe the methodology utilized to prevent a nuclear criticality accident.
Author: Publisher: ISBN: Category : Languages : en Pages : 18
Book Description
Mass volume limits are frequently used in the Separations Areas recovery operations where precise modelling may not be feasible or justified. Mass volume limits also provide a quick, ready and conservative reference to Nuclear Safety personnel when called upon for guidance. Specifically, New Special Recovery Personnel requested mass volume limits directly applicable to the Sample Handling operations. Earlier Nuclear Safety Analysis by J.L. Forstner provided limits at 0%, 2% and 4% 24°Pu that could be applied but were in graphical form and the actual data for the 2% 24°Pu log-log curve could not be found. Further, recently concerns were expressed as to operations personnel reading log-log plots, extracting meaningful information and directly applying as nuclear safety limits. Data included in the attached charts and tables is the author's attempt to remedy this condition. Table 2 provides mass volume limits that can be extracted in part or completely and directly applied to the Nuclear Criticality Safety Supplements and operating procedures. Figures 1 through 7 are for the purists who prefer graphical representations.
Author: Ronald Allen Knief
Author: Ronald Allen Knief
Author: International Organization for Standardization
Author: 
Author: Hans Toffer
Author: British Standards Institute Staff
Author: B. C. Ha
Author: U.S. Nuclear Regulatory Commission
Author: Berry F. Estes
Author: 
Author: