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Technical specifications for the Pajarito Site Critical Experiments Facility

Description: This document is to satisfy the requirement for technical specifications spelled out in ERDA Manual Chapter 0540, ''Safety of ERDA-Owned Reactors.'' Technical specifications are defined in Sec. 0540-048, and the requirement for them appears in Sec. 0540-015. The following technical specifications replace the document, ''Operating Limits for the Los Alamos Critical Assembly Facility,'' revised May 27, 1971. (auth)
Date: June 1, 1975
Creator: Paxton, H.C.
Partner: UNT Libraries Government Documents Department

Experimental criticality specifications, update through 1979. Informal report

Description: A table of contents for LA-7170-MS is provided, and publications of criticality specifications that appeared in 1978 and 1979 are listed. The table was omitted from the original document. An abstract of the original report appeared in Energy Research Abstracts, Volume 3: 43410.
Date: February 1, 1980
Creator: Paxton, H.C. (comp.)
Partner: UNT Libraries Government Documents Department

History of critical experiments at Pajarito Site

Description: This account describes critical and subcritical assemblies operated remotely at the Pajarito Canyon Site at the Los Alamos National Laboratory. Earliest assemblies, directed exclusively toward the nuclear weapons program, were for safety tests. Other weapon-related assemblies provided neutronic information to check detailed weapon calculations. Topsy, the first of these critical assemblies, was followed by Lady Godiva, Jezebel, Flattop, and ultimately Big Ten. As reactor programs came to Los Alamos, design studies and mockups were tested at Pajarito Site. For example, nearly all 16 Rover reactors intended for Nevada tests were preceded by zero-power mockups and proof tests at Pajarito Site. Expanded interest and capability led to fast-pulse assemblies, culminating in Godiva IV and Skua, and to the Kinglet and Sheba solution assemblies.
Date: March 1, 1983
Creator: Paxton, H.C.
Partner: UNT Libraries Government Documents Department

Thirty-five years at Pajarito Canyon Site

Description: A history of the research activities performed at the Pajarito Canyon Site from 1946 to 1981 is presented. Critical assemblies described include: the Topsy assembly; Lady Godiva; Godiva 2; Jezebel; Flattop; the Honeycomb assembly for Rover studies; Kiwi-TNT; PARKA reactor; Big Ten; and Plasma Cavity Assembly.
Date: May 1, 1981
Creator: Paxton, H.C.
Partner: UNT Libraries Government Documents Department

Roy Reider (1914-1979) selections from his written and spoken words

Description: Comments by Roy Reider on chemical criticality control, the fundamentals of safety, policy and responsibility, on written procedures, profiting from accidents, safety training, early history of criticality safety, requirements for the possible, the value of enlightened challenge, public acceptance of a new risk, and on prophets of doom are presented.
Date: January 1, 1980
Creator: Paxton, H.C. (comp.)
Partner: UNT Libraries Government Documents Department

Experimental criticality specifications. An annotated bibliography through 1977

Description: The compilation of approximately 300 references gives sources of experimental criticality parameters of systems containing /sup 235/U, /sup 233/U, and /sup 239/Pu. The intent is to cover basic data for criticality safety applications. The references are arranged by subject.
Date: May 1, 1978
Creator: Paxton, H.C. (comp.)
Partner: UNT Libraries Government Documents Department

Critical dimensions of systems containing /sup 235/U, /sup 239/Pu, and /sup 233/U: 1986 Revision

Description: This report is primarily a compilation of critical data obtained from experiments performed in a number of laboratories during the period of 1945 through 1985. It supplements the Nuclear Safety Guide (Report TID-7016 (Rev. 2)) in presenting critical data on which recommendations of the Guide are based. It must be emphasized that this report gives critical data without safety factors, so it is no substitute for the Guide or for the related document, The American National Standard for Nuclear Criticality Safety in Operations with Fissionable Materials Outside Reactors. Critical measurements with materials of interest in desired configurations yield information of greatest usefulness and accuracy. Where it is not feasible to obtain the desired critical data, for example, as a result of safety restrictions, subcritical data may be directly applicable, and in some cases may be extrapolated to approximate critical conditions. Critical conditions also may be approximated from the distribution of neutrons introduced into a subcritical assembly. These ''exponential experiments'' may be the only alternative where the quantity of material required is too great for a critical experiment. Calculated extensions of experimental data are included to show the nature of trends, not to substitute for results of experiments. They should be used with caution. A fundamental aim of this document is to illustrate relationships among critical data. The compilation and correlation of data for this purpose, from many measurements in a number of laboratories, require a certain amount of normalization or reduction to common terms. Frequently, for example, the effects of variations in geometry or density must be removed to show trends in data. The manner in which these alterations may be made is discussed in the early section Relations for Conversion to Standard Conditions. 195 refs.
Date: July 1, 1987
Creator: Paxton, H.C. & Pruvost, N.L.
Partner: UNT Libraries Government Documents Department

Technical specifications for the Pajarito Site Critical Experiments Facility

Description: This document is to satisfy the requirement for technical specifications spelled out in DOE Manual Chapter 0540, Safety of DOE-Owned Reactors. Technical specifications are defined in Sec. 0540-048, and the requirement for them appears in Sec. 0540-015. The following technical specifications update the document, Technical Specifications for the Pajarito Site Critical Experiments Facility (June 1975).
Date: December 1, 1980
Creator: Malenfant, R.E. & Paxton, H.C.
Partner: UNT Libraries Government Documents Department

Nuclear criticality safety guide

Description: This technical reference document cites information related to nuclear criticality safety principles, experience, and practice. The document also provides general guidance for criticality safety personnel and regulators.
Date: September 1, 1996
Creator: Pruvost, N.L. & Paxton, H.C.
Partner: UNT Libraries Government Documents Department

Safety analysis of the Los Alamos critical experiments facility: burst operation of Skua

Description: A detailed consideration of the Skua burst assembly is presented, thereby supplementing the facility safety analysis report covering the operation of other critical assemblies at Los Alamos. As with these assemblies the small fission-product inventory, ambient pressure, and moderate temperatures in Skua are amenable to straightforward measures to ensure the protection of the public.
Date: May 1, 1979
Creator: Orndoff, J.D.; Paxton, H.C. & Wimett, T.F.
Partner: UNT Libraries Government Documents Department

Safety analysis of the Los Alamos critical experiments facility: burst operation of Skua

Description: Detailed consideration of the Skua burst assembly is provided, thereby supplementing the facility Safety Analysis Report covering the operation of other critical assemblies at the Los Alamos Scientific Laboratory. As with these assemblies the small fission-product inventory, ambient pressure, and moderate temperatures in Skua are amenable to straightforward measures to ensure the protection of the public.
Date: December 1, 1980
Creator: Orndoff, J.D.; Paxton, H.C. & Wimett, T.F.
Partner: UNT Libraries Government Documents Department