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open access

Measurement of the neutron-induced fission cross-section of /sup 243/Am relative to /sup 235/U from 0. 1 MeV to 30 MeV

Description: Continuing studies of fission cross-section ratios at Lawrence Livermore Laboratory have led to the measurement of the /sup 243/Am//sup 235/U fission cross-section ratio from 0.1 to 30 MeV. A value of 1.429 +- 0.037 was obtained for the average cross-section ratio from 1.75 to 4.00 MeV by use of the threshold method. 2 figures, 1 table.
Date: July 7, 1977
Creator: Behrens, J. W.
open access

LOFT suppression tank spray system piping: heat exchanger BS-H-31 piping modifications

Description: A stress analysis of the piping modification, resulting from relocation of heat exchanger BS-H-31 of the LOFT Blowdown Suppressing Tank Spray System, was performed. The piping, fittings, and supports were found to comply with the criteria of Section III of the ASME Boiler and Pressure Vessel Code, 1974.
Date: November 7, 1977
Creator: Blandford, R.K.
open access

CORTAP: a coupled neutron kinetics-heat transfer digital computer program for the dynamic simulation of the high temperature gas cooled reactor core

Description: CORTAP (Core Transient Analysis Program) was developed to predict the dynamic behavior of the High Temperature Gas Cooled Reactor (HTGR) core under normal operational transients and postulated accident conditions. CORTAP is used both as a stand-alone component simulation and as part of the HTGR nuclear steam supply (NSS) system simulation code ORTAP. The core thermal neutronic response is determined by solving the heat transfer equations for the fuel, moderator and coolant in an average powered… more
Date: January 7, 1977
Creator: Cleveland, J. C.
open access

Some not-so-common ways of using MCS-8 I/O instructions, LEN 22269. [Intel 8008]

Description: The I/O instructions for the Intel 8008 Microprocessor have versatilities that are not apparent to most users. The Standard lament is that there are only 8/sub 10/ input instructions. The fact that there are only 24/sub 10/ output instructions is sometimes belabored, but 24 is normally considered sufficient for most microprocessor applications. This note discusses ways to expand the available number of both these instructions. 4 figures.
Date: June 7, 1977
Creator: Fisher, E. R.
open access

Summary of geologic review group meeting, January 20--21, 1977

Description: The Office of Waste Isolation program was reviewed. Topics involving program management and geologic aspects of radioactive waste isolation were discussed.
Date: March 7, 1977
Creator: Frye, JOHN C.; Crawford, James H.; Davis, Stanley N.; Donath, Fred A.; Gloyna, Earnest F. & Krauskopf, Konrad B.
open access

Large area silicon sheet task low-cost silicon solar array project. Fourth quarterly progress report, September 27, 1976--December 31, 1976

Description: The seeded growth furnace with a slotted molybdenum susceptor has been operated during the past quarter. The susceptor design permits flat sheets of refractory materials to be used in making up the tray. Fused quartz and sapphire trays were used. Local surface cooling was obtained by means of a water-cooled cold finger. Seeded surface growth has been obtained in this furnace using a seed with (111) axis and (112) principal faces. The silicon grown out of solution has a region approximately 3 mm… more
Date: January 7, 1977
Creator: Garfinkel, M. & Hall, R. N.
open access

In-line measurement of total and isotopic plutonium concentrations by gamma-ray spectrometry

Description: Preliminary experiments studying the feasibility of gamma-ray spectrometry for in-line measurements of plutonium in solutions are described. The isotopic content of the plutonium was measured by direct counting and the total plutonium content by a differential attenuation technique. Two separate experiments on different solutions were performed with each technique. Our results show that both isotopic and total measurements can be made with precisions around 0.25 to 0.5 percent.
Date: February 7, 1977
Creator: Gunnink, R. & Evans, J. E.
open access

LASNEX: pondermotive force algorithm

Description: The new algorithm used to calculate the ponderomotive force in LASNEX is discussed. The algorithm is shown to be identical with the corresponding analytic expression when the WKB solution for the fields in a plane-parallel medium is used. LASNEX calculations performed to check the ponderomotive force algorithm are described. 2 figures.
Date: July 7, 1977
Creator: Harte, J. A. & Zimmerman, G. B.
open access

Structural integrity of materials in nuclear service: a bibliography

Description: This report contains 679 abstracts from the Nuclear Safety Information Center (NSIC) computer file dated 1973 through 1976 covering material properties with respect to structural integrity. All materials important to the nuclear industry (except concrete) are covered for mechanical properties, chemical properties, corrosion, fracture or failure, radiation damage, creep, cracking, and swelling. Keyword, author, and permuted-title indexes are included for the convenience of the user.
Date: June 7, 1977
Creator: Heddleson, F. A.
open access

Slicing of silicon into sheet material. Silicon sheet growth development for the large area silicon sheet task of the Low Cost Silicon Solar Array Project. Fifth quarterly report, March 21, 1977--May 27, 1977

Description: The multiblade slurry technique capable of slicing 10 cm ingot into wafers 0.25 mm thick with only 0.20 mm kerf loss and 98% yield has been demonstrated. The total silicon requirement represents an ingot to sheet conversion of 0.95 m/sup 2//kg. Full production slicing tests have demonstrated the cost of MS slicing to contribute $40 to $50/m/sup 2/, with ''best effort'' estimates for today's configuration to be $30 to $35/m/sup 2/. By reducing material cost, and increasing the specific capacity … more
Date: July 7, 1977
Creator: Holden, S. C. & Fleming, J. R.
open access

Small momentum width beams in ISABELLE: a useful feature for experiments

Description: The energy width of beams in proton storage rings is an adiabatic invariant and, therefore, only a weak function of energy. For low current stacks, small momentum width beams are therefore possible. It is found that under conditions of reduced luminosities, the rms full width of the momentum distribution of the beams in ISABELLE is in the region of 5 to 20 MeV. It is interesting that for electrons, the energy width of the beams is determined by the balance of radiation damping and quantum fluct… more
Date: February 7, 1977
Creator: Humphrey, J. W. & Month, M.
open access

Radio interference with minicomputers and minicomputer peripherals

Description: Rf bypass capacitors were added to the Head Position Preamplifier and Servo Power Amplifier on Digital Equipment Corporation (DEC) RK05 DISK TRANSPORTS, and ground straps were installed between all peripheral chassis and the main frame of the minicomputers to eliminate interference that was generated by hand-held two-way radios operating in the 165 and 410 MHz ranges. 2 figures.
Date: October 7, 1977
Creator: Kesling, W. E.
open access

Review of methods for the detection of 10 nCi/g of transuranic isotopes in solid waste

Description: The U.S. Atomic Energy Commission has defined transuranic-contaminated waste as material that is contaminated with greater than 10 nCi/g of long-lived and highly toxic radionuclides. The analyses and techniques that show potential for detection at this low level are reviewed. The physics involved with the methods described is relatively straightforward, but difficulties arise in the actual application of the techniques. Therefore, discussion is concentrated on the application of the analyses, i… more
Date: January 7, 1977
Creator: King, W. C.
open access

Batch Kd measurements of nuclides to estimate migration potential at the proposed Waste Isolation Pilot Plant in New Mexico

Description: Laboratory measurements to determine the sorption distribution coefficients, Kd, of radionuclides present in, and potentially leached from, radioactive wastes, in contact with representative geologic media, have been conducted. The nuclides studied include Cs, Sr, Tc, Ru, Sb, Ce, Eu, Pu, Np, Cm, Am, U, and Pa. The crushed rock materials used were from the vicinity of the Waste Isolation Pilot Plant, a project to isolate radioactive wastes in a bedded salt facility, near Carlsbad, New Mexico. So… more
Date: October 7, 1977
Creator: Serne, R.J.; Rai, D.; Mason, M.J. & Molecke, M.A.
open access

Field-reversal experiments in the mirror fusion test facility (MFTF)

Description: Detailed consideration of several aspects of a field-reversal experiment was begun in the Mirror Fusion Test Facility (MFTF): Model calculations have provided some plausible parameters for a field-reversed deuterium plasma in the MFTF, and a buildup calculation indicates that the MFTF neutral-beam system is marginally sufficient to achieve field reversal by neutral injection alone. However, the many uncertainties indicate the need for further research and development on alternate buildup method… more
Date: December 7, 1977
Creator: Shearer, J.W. & Condit, W.C.
open access

Feasibility study and prototype design of a NaI gamma-ray densitometer for use in LOFT

Description: The performance of a gamma-ray densitometer system using computer modeling techniques is predicted. The system studied consists of a /sup 60/Co calibration source, a pipe containing a variable amount of water absorber where the water contains radioactive /sup 16/N, and a shielded and collimated NaI detector system. The basic question is: Can one detect the change in signal from the collimated /sup 60/Co calibration source caused by a water density change when the detector system is subject to a… more
Date: January 7, 1977
Creator: Swierkowski, S. P.
open access

450/sup 0/F step transient thermal analysis of the LOFT pressurizer surge and spray line piping

Description: The LOFT pressurizer spray and surge line piping was analyzed for a 450/sup 0/F step change in fluid temperature. This transient was chosen to conservatively represent several pressurizer operating transients that had not previously been analyzed. These include temperature transients resulting from a 300/sup 0/F ..delta..T between pressurizer temperature and cold leg temperature, injection of a cooled (70/sup 0/F) slug of stagnant fluid into the hot (540/sup 0/F) spray line piping, and inflow o… more
Date: July 7, 1977
Creator: Tolan, B.J.
open access

Differential equation for Alfven ion cyclotron waves in finite-length plasma

Description: One finds the fourth-order differential equation describing an Alfven-ion-cyclotron wave propagating along a magnetic field of varying intensity. The equation is self-adjoint and possesses non-trivial turning points. The final form of the equation is checked using MACSYMA, a system for performing algebra on a computer.
Date: September 7, 1977
Creator: Watson, D. C.; Fateman, R. J. & Baldwin, D. E.
open access

Status report on the fluidized bed incineration system for U. S. Energy Research and Development Administration transuranic waste, January--June 1976

Description: A fluidized-bed incineration facility is being designed for installation at the Rocky Flats Plant to develop and demonstrate the process for the combustion of transuranic waste. The unit capacity will be about 82 kg/hr of combustible waste. The combustion process will utilize in situ neutralization of acid gases generated in the process. The equipment design is based on data generated on a pilot scale unit and represents a scale-up factor of nine. Title II engineering is at least 70 percent com… more
Date: March 7, 1977
Creator: Ziegler, Donald L.; Richey, Lewis L.; Johnson, Andrew J.; Teter, Alton L.; Feng, Pen K.; Peterson, Dave J. et al.
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