A Note from the MCNP Team on the Los Alamos Fire

Many of you have expressed your concerns and sent us your best wishes during the recent Cerro Grande fire at Los Alamos. I regret that I cannot reply personally to each of you. Your concern, prayers, offers of support, and best wishes are truly appreciated.

The Monte Carlo Team was very, very lucky. Nobody lost a home and damage was mostly limited to food spoilage and the expenses of evacuating our homes. But each of us knows many people who did lose homes or had serious damage. Approximately 10% of the homes in Los Alamos were totally destroyed and another 10% damaged.

The Los Alamos Laboratory was also very lucky. Although there was a lot of ash and something like 30% of all trees on Laboratory property were destroyed, no major structures were lost and almost every program is back up running again.

The firefighters did a heroic job. I believe if they had not vigorously fought the fires most of the Laboratory and all of the town would have been destroyed. The once beautiful forest surrounding Los Alamos on 3 sides is now a pile of ash and the trees look like black sticks. About 50,000 acres were burned (78 square miles, or 217 square kilometers.)

Note that on the worst day of the fire we still gave the MCNP workshop at the PHYSOR2000 meeting in Pittsburgh, PA, and our May 23-26 Introduction to MCNP class also went as scheduled, although it was moved to Albuquerque instead of Los Alamos because the Laboratory was closed.

Again, thank you for your thoughts and best wishes during our very difficult ordeal.

Gregg McKinney, Team Leader
Ken Adams, Tom Booth, Judi Briesmeister, Larry Cox,
Jeff Favorite, Art Forster, Gregg Giesler,
Bill Hamilton, John Hendricks, Russ Mosteller,
Dick Prael, Elizabeth Selcow,
Avneet Sood, Chris Werner

When you think of summer, watermelon and fishing might come to mind. But around here it means a swell in the local population. Oak Ridge National Laboratory participates in a number of student/teacher intern programs, and it is our pleasure to host two undergraduate students for the spring/summer term.

James Anthony Cheatham, a graduate of Elizabeth City State University in North Carolina, with a Bachelor of Science degree in Computer Science, is serving his second internship at ORNL. He is here under the Research Alliance for Minorities (RAM) Internship Program. The program is designed to provide collaborative research experiences among faculty and students at Alliance colleges or universities and DOE national laboratory researchers which will improve the U.S. competitive research edge while encouraging and promoting science, mathematics, and engineering research throughout the academic year.

Of his experience at the lab, Anthony says, "I hope to learn more ways to do Web page designing, learn how to manage hardware problems, gain credentials for recommendations for future employment and education. Last term, I designed and revised WebPages and learned CGI programming in PERL (Anthony was with the Computer Science and Mathematics Division at the time). I got a chance to see how doing research gives you the flexibility to learn about many aspects in my field." Anthony is applying to the University of Tennessee-Knoxville's Department of Computer Science.

You may obtain more information about the RAM program from the link provided above or by contacting:

Ruth Ann Manning, Ph.D.
Director, Research Alliance for Minorities (RAM) Program
Computer Science and Mathematics Division
Oak Ridge National Laboratory (Room 106, Bldg. 6010)
P.O. Box 2008
Oak Ridge, TN 37831-6414
ORNL: 865-574-3135 UTK: 865-974-5974
FAX: 865-241-6211
Email: ruthann@msr.epm.ornl.gov

James Walton Wright, Jr., graduated with honors from Hinds Community College in Raymond, Mississippi. He has an AA degree in engineering from Hinds Community College. While at Hinds, he was a member of the Honors Program, a committee chairman of the Associated Student Government, and a member of the Phi Theta Kappa Honors Society. He will attend Mississippi State University in the fall as a computer science major with a math minor. He is with us via the Institute in Biotechnology, Computing, and Environmental Sciences, a program sponsored by the Office of Science, Department of Energy, to meet the needs of community college students. Students from selected institutions are matched with participating Department of Energy laboratories.

James says, "I hope to gain some practical work experience from working at ORNL. I have already started to learn a lot. For example, I have been learning UNIX OS, HTML, and CFML (ColdFusion). I am very fortunate to be at ORNL because the lab has been the first place to offer me the opportunity to work with the UNIX OS and CFML. I believe working at ORNL will truly be a rewarding experience and enrich my education."

You may obtain more information about the Community College Initiative program by contacting:

Linda Cain
Office of University and Science Education
Oak Ridge National Laboratory
5500A Room 220A MS 6356
Oak Ridge, TN 37831-6356
Email: cainlc@ornl.gov
Voice: 865-576-3886, Fax: 865-241-6776

The halls in Building 6011 at Oak Ridge National Laboratory are a little quieter now. There's definitely a noticeable drop in the "laughter-level."

Richard Quinten Wright--known to most of us as "R.Q."--retired from the lab on May 31, 2000, after 34 years of devoted service.

R.Q. received his BS and MS degrees in Mathematics from Emporia State University in Kansas. He came to Oak Ridge in 1966 after serving in the U.S. Navy, during which time he taught a course in Nuclear Engineering, using the venerable textbook written by Glasstone and Edlund. It was probably the teaching of this course that initiated his passionate love of working with cross sections and computer codes, particularly SUPERTOG and modules in the early versions of AMPX. He worked on several tasks during his tenure at Oak Ridge, but it was obvious to all who know him where his real interests lay.

While the name of the division that R.Q. hired into has changed four or five times - it is now the Computational Physics and Engineering Division - it is still the same organization. The Radiation Safety Information Computational Center was moved into this division around 5 years ago; and R.Q. joined this part of the division around 4 years ago, though he has had close ties working with RSICC since he joined ORNL.

R.Q. made many presentations at American Nuclear Society meetings, particularly concerning benchmarking activities with which he was associated. He served as part of the Evaluated Nuclear Data Files (ENDF/B) effort and its associated Cross Section Evaluations Working Group (CSEWG). A large number of the evaluations distributed in ENDF/B show R.Q. as the evaluator, or as a contributing evaluator.

R.Q.'s work and good humor will be missed by us all, and we know that you will join with us in wishing him well in his new career stage. You may contact him at rqwright@aol.com.

Four U.S. Nuclear Regulatory Commission (NRC) software packages which were transferred from the Energy Science and Technology Software Center, Oak Ridge, Tennessee to RSICC were incorporated into the RSICC computer code collection. Please browse the computer code abstracts available at RSICC's www site for more information on these packages.

Four changes were made to the computer code collection during the month. Three changes resulted from foreign contributions.

The International Atomic Energy Agency, Nuclear Data Section, Vienna, Austria, through the OECD Nuclear Energy Agency Data Bank, Issy-Les Molineaux, France, contributed this code system for the evaluation of correlated data using partitioned least squares. Given an existing combined set y(i) of differential and integral measurements with completely general covariances cyy(i,j) and a sensitivity matrix relating the expectation values of the various measurements, ZOTT obtains a new evaluation yp(i) with covariances cyyp(i,j). The results yp(i) are minimum-variance linear unbiased estimators of the true values, E[y(i)]. ZOTT99 differs from ZOTT95 in that it offers the analyst the option of applying a simple universal and objective method, called the Method of Least Distortion (MLD), to treat discrepant data, that is, data sets for which the overall chi-squared per degree of freedom substantially exceeds unity.

ZOTT99 was tested at the NEA Data Bank on a DEC Alpha running OpenVMS. It was tested at RSICC on a Pentium II and on Sun using Fortran 77. An executable created under Windows95 with the Lahey-F77L-EM32 Version 5.2 compiler is included in the package for PC users. The package is transmitted on one DS/HD diskette including the source file, and sample input and output transmitted in a compressed self-extracting DOS file. References: Paper from the Covariance Workshop Brookhaven, New York, USA (22-23 April 1999), LA-UR-2365. Fortran 77; Pentium, DEC Alpha, and Sun (P00272ALLCP02).

Oak Ridge National Laboratory, Oak Ridge, Tennessee, contributed an updated version of this visualization tool for KENO geometry models. KENO3D is a powerful state-of-the-art visualization tool that enables KENO-V.a users to interactively display their three-dimensional geometry models.

Registered KENO3D Version 1.00 users may download the updated files for KENO3D from the KENO3D web site: http://www.cped.ornl.gov/scale/keno3d/index.html. The Monte Carlo criticality program KENO V.a is distributed within the CCC-545/SCALE4.4a package and is not included in this distribution. Familiarity with KENO V.a is assumed.

The following features are incorporated in Version 1.02.
Error in "loop" processing was corrected
Added an option to set the default wireframe color
Added an option to specify absolute location for axes
Error in "replicate" processing was corrected

KENO3D has the look and feel of a typical PC Windows application. Toolbar buttons are included for all major menu options. A setup dialog allows the user to specify which toolbars should be displayed. An extensive online help system is included in this package to aid the user. The file, KENO3D.chm, is a compiled html file that is viewable while running KENO3D or using Internet Explorer 5.0. KENO3D provides an interface to ACIS® 3D Toolkit. To install and use KENO3D, you must have the following:

Internet Explorer 5 or later is required to use the KENO3D help files. Microsoft C++ Version 6.0 was used to create the executable included in the package. Due to the proprietary nature of the ACIS® software, source code is not available, and each user will be charged a royalty fee. The required ACIS® software is bundled into the executable. The package is transmitted on one CD-ROM which includes the documentation files, executables, and test case input written in DOS format. Reference: README.html (Dec. 1999). Microsoft Visual C++; Pentium (P00450PC58601).

Synthesis Srl, Milano, Italy, and ENEL SpA, Milano, Italy, through the OECD Nuclear Energy Agency Data Bank, Issy-Les Molineaux, France, contributed this code system to perform neutronic and thermal-hydraulic subchannel analysis from converged coarse-mesh nodal solutions. NORMA-FP is an auxiliary program which can perform a neutronic and thermal-hydraulic subchannel analysis, starting from global core calculations carried out by both PSR-471/NORMA or PSR-492/QUARK codes. Detailed flux and power distributions inside homogenized nodes are computed by a two-stage bivariate interpolation method, upon separation of the axial variable for which an analytical solution is adopted. The actual heterogeneous structure of a node is accounted for by fuel rod power factors computed as functions of burnup, burnup-weighted coolant density, and instantaneous coolant density. The computational procedure requires node-averaged cross-sections and group fluxes and nodal face-averaged partial currents and discontinuity factors, all of which are supplied by the restart files of NORMA or QUARK. When required, a detailed three-dimensional rod power distribution for a whole channel can be obtained; and a thermal-hydraulic subchannel analysis can be performed by a program section based on the COBRA-EN model.

NORMA-FP runs on a PC with 486 or Pentium processor and at least 8 Mb of RAM. The included PC executables were created with Digital Visual Fortran Version 6.0A and tested at RSICC on a Pentium/266 under Windows95. The package is transmitted on two DS/HD diskettes written in self-extracting compressed DOS files. Reference: ENEL-DSR-CRTN-N5/91/05/M (September 1991). Fortran 77; PC 486 (P00470PC58600).

Synthesis Srl, Milano, Italy, and ENEL SpA, Milano, Italy, through the OECD Nuclear Energy Agency Data Bank, Issy-Les Molineaux, France, contributed this code system to solve burnup dependent neutron diffusion equations in two and three dimensions. The NORMA program is designed to simulate the follow-up of a PWR core and can solve multigroup diffusion problems or two-group diffusion-depletion problems in three dimensions. The burnup model is implicit, and the diffusion equations are approximated by a new coarse-mesh Polynomial Nodal Method, developed at MIT and originally included in the CONQUEST core kinetics code. The equivalent homogenized nuclear parameters are supplemented by the discontinuity factors, according to Henry's generalized equivalence theory. These parameters are updated by trilinear interpolation in three-entry tables and are corrected for dilute boron, Sm and Xe poisoning and Doppler effects with the further provision for an automatic boron adjustment to achieve criticality. In order to calculate the local coolant densities and temperatures, two thermal-hydraulic models can be applied optionally: the earlier CRTN model dealing with four zones along each channel and the last available version of the more sophisticated COBRA-EN model. NORMA also allows a separate detailed output of the results for each burnup step.

NORMA runs on a PC with 486 or Pentium processor and at least 8 Mb of RAM.The included PC executables were created with Digital Visual Fortran Version 6.0A and tested at RSICC on a Pentium/266 under Windows95. The package is transmitted on two DS/HD diskettes as self-extracting compressed DOS files which contain FORTRAN source files, PC executable, documentation files and sample problem input and output. Reference: Synthesis Srl, rep. 1034/2 (July 1995). Fortran 77; PC 486 (P00471PC58600).

Moshe Goldstein from the Nuclear Research Center, in Negev, Israel, visited RSICC in June.

John Paul Blewett, 89, nuclear physicist who played a significant role in the development of particle accelerators; joined the research laboratory of General Electric Company in 1937 and made the first direct observation of synchrotron radiation; began working for Brookhaven National Laboratory in 1947 and took part in the construction of the Cosmotron, once the world's most powerful energy accelerator; participated in the design of the Alternating Gradient Synchrotron, which has been operating since 1960, and served as a consultant to the French Atomic Energy Commission and CERN; retired from BNL in 1978 as a senior physicist; died on April 7 in Chapel Hill, North Carolina.

Walter Michael Gajewski, 77, ANS Member 1956-1997, electrical engineer; spent his 38-year career working for Westinghouse Electrical Corp. - at the Bettis Laboratory in Pittsburgh, the Naval Reactor Facility in Idaho, and the Fast Flux Test Facility in Washington; participated in the design, development, testing and operation of early Naval nuclear reactors; retired in 1988 as an assistant manager of engineering; died April 10 in Kennewick, Washington.

Edward F. Knipling, 90, entomologist who pioneered the use of radiation to sterilize male insects and suppress insect populations; with colleague Raymond Bushland, began irradiating screwworm files on an Army X-ray machine following World War II, and released the first sterilized flies in 1953 on Sanibel Island, meeting with encouraging results; in 1954, the Agriculture Department released 150,000 sterilized flies a week on the Dutch island of Curacao and within three months eradicated the screwworm from the island; retired from the USDA's Agricultural Research Service in 1973 after 42 years with the department; died March 17 at his home in Arlington, Virginia.

RSICC attempts to keep its users/contributors advised of conferences, courses, and symposia in the field of radiation protection, transport, and shielding through this section of the newsletter. Should you be involved in the planning/organization of such events, feel free to send your announcements and calls for papers via email to finchsy@ornl.gov with "conferences" in the subject line. Please include the announcement in its native format as an attachment to the message. If the meeting is on a website, please include the url.

Every attempt is made to ensure that the links provided in the Conference and Calendar sections of this newsletter are correct and live. However, the very nature of the web creates the possibility that the links may become unavailable. In that case, please call or mail the contact provided.

This course is aimed at the HP, medical physicist, and rad engineer with no prior experience with Monte Carlo techniques. The focus is almost entirely on the application of MCNP™ to solve a variety of practical problems in radiation shielding and dosimetry. The intent is to "jump start" the student toward using MCNP™ productively. Extensive interactive practice sessions are conducted on a personal computer. Topics will include overview of the MCNP™ code and the Monte Carlo method, basic concepts, input file preparation, geometry, source definition, standard MCNP tallies, interpretation of the output file, exposure and dose rate calculations, radiation shielding, photon skyshine, detector simulation and dosimetry.

The course fee includes a complete MCNP™ code package, distributed directly from the Radiation Safety Information Computational Center (RSICC). Students will also be provided with a comprehensive class manual and a diskette containing all of the practice problems. This course has been granted 32 Continuing Education Credits by the AAHP. The course is offered by the Health Physics Measurements Group at the Los Alamos National Laboratory and is co-sponsored by RSICC.

Registration is available online at http://drambuie.lanl.gov/~e sh4/mcnp.htm; however, to guarantee a space payment must be received prior to the registration deadline. Make checks payable to the University of California (checks must be in U.S. dollars on a U.S. bank) and mail together with name, address, and phone number to the address above. The course is offered by Group ESH-4, Health Physics Measurements, Mail Stop G761, Los Alamos National Laboratory, Los Alamos, NM 87545 USA.

Inquiries regarding registration and class space availability should be made to David Seagraves, 505-667-4959, fax: 505-665-6071, e-mail: dseagraves@lanl.gov. Technical questions may also be directed to Dick Olsher, 505-667-3364, e-mail: dick@lanl.gov.

An MCNP and Visual Editor Training Course will be held October 9-12 in Richland, Washington. The cost is $1400.

The class will combine teaching on MCNP physics, along with instructions on how to use the visual editor. Computer demonstrations and exercises will focus on creating and interrogating input files with the visual editor. Demonstrations of advanced visualization work using MCNP will also be made. The class will be taught on Pentium computers running the Linux operating system. Attendees are encouraged to bring their own input files for viewing and modifying in the visual editor. It is recommended that you have experience with MCNP before taking this class. For additional information contact Randy Schwarz, MS K8-34, P. O. Box 999, Richland, WA 99352 (509-372-4042, fax 509-372-6421, email randy.schwarz@pnl.gov, url http://www.pnl.gov/eshs/software/ved.html).

The following is the 2000 schedule for Monte Carlo N-Particle Transport Code Workshops.

NOTE: While MCNP supports a number of platforms, class computers are usually Unix machines. Experience with Unix will be helpful to the student but is not essential.

Year 2000 classes will showcase the latest release of MCNP, Version 4C. Major new features that will be discussed include:

Eighth International Conference on Electronic Spectroscopy and Structure (ICESS), Campus of the University of California, Berkeley, Aug. 8-12, 2000. Contact: icess@lbl.gov (url http://www-als.lbl.gov/icess/).

Monte Carlo Analysis, Aug. 14-18, 2000, Knoxville, Tennessee, a short course by the University of Tennessee. Contact: Lydia Salmon, Dept. of Nuclear Engineering, University of Tennessee, Knoxville, TN 37996 (tel 865-974-2525, email lutne@utk.edu, url http://www.engr.utk.edu/dept/nuclear/ TIW.html).

Nuclear Criticality Safety, Aug. 14-18, 2000, Knoxville, Tennessee, a short course by the University of Tennessee. Contact: Lydia Salmon, Dept. of Nuclear Engineering, University of Tennessee, Knoxville, TN 37996 (tel 865-974-2525, email lutne@utk.edu, url http://www.engr.utk.edu/dept/nuclear/TIW.html).

Scientific Basis for Nuclear Waste Management Symposium (MRS 2000), Aug. 27-31, 2000, Sydney, Australia, sponsored by the Materials Research Society. Contact: MRS 2000 Secretariat, P.O. Box Q894, QVB Post Office, Sydney NSW 1230 Australia (tel + 61 2 9262 4211, fax + 61 2 9262 4255, email facets@facetmanagement.com.au, url http://www.facetmanagement.com.au/mrs2000/main.htm).

25th Annual Symposium of the Uranium Institute, Aug. 30-Sept. 1, 2000, Queen Elizabeth II Conference Center, London, England, United Kingdom. Contact: Concorde Services Ltd., 42 Canham Rd., London W3 7SR, U.K. (tel + 44 20 8743 3106, fax + 44 20 8743 1010, email admin@uisymposium.com, url www.uisymposium. com).

Fifth International Conference on Nuclear and Radiochemistry, Sept. 3-8, 2000, Pontresina, Switzerland, sponsored by the Paul Scherrer Institut. Contact: Labor f. Radio- und Umweltchemie, Ruth Lorenzen, CH-5232 Villigen PSI, Switzerland (tel + 41 56 310 24 01, fax + 41 56 310 44 35, email ruth.lorenzen@psi.ch, url http://www1.psi.ch/www_lch_hn/nrc5/).

4th International Conference on Supercomputing in Nuclear Applications (SNA 2000), Sept. 4-7, 2000, Toranomon-Pastoral, Tokyo, Japan, sponsored by Japan Atomic Energy Research Institute, cosponsored by OECD/Nuclear Energy Agency, Atomic Energy Society of Japan, Japan Nuclear Cycle Development Institute. Contact: Hideo Kaburaki, Center for Promotion of Computational Science and Engineering, Japan Atomic Energy Research Institute (tel + 81-3-5723-2513, fax + 81-3-5723-2537, email sna2000@koma.jaeri.go.jp,http://ciscper.tokai.jaeri.go.jp/sna2k/).

International Conference on Nuclear Physics, Sept. 5-13, 2000, Zakopane, Poland, sponsored by the Henryk Niewodniczanski Institue of Nuclear Physics and others. Contact: H. N. Institute of Nuclear Physics, ul. Radzikowskiego 152, 31-342 Krakow, Poland (tel + 48 12 637 02 22, fax + 48 12 637 18 81, email zakopane@alf.ifj.edu.pl, url http://chall.ifj.edu.pl/~dept2/zakopane2000/circular. htm).

Energy Information Centers Workshop, Sept. 11-13, 200, Desert Inn, Las Vegas, NV, sponsored aby the Nuclear energy Institute. Contact: NEI, (tel 202-739-8000, fax 202-785-4019).

International Conference Nuclear Energy in Central Europe 2000, Sept. 11-14, 2000, Golf Hotel, Bled, Slovenia. Contact: Leon Cizelj, Nuclear Society of Slovenia, Bled 2000, Jamova 39, 1001 Ljubljana, Slovenia (fax + 386 61 161 23 35).

Radiation Protection for Our National Priorities: Medicine, the Environment, and the Legacy, Sept. 17-21, 2000, Spokane, Washington. Contact: Harvey Goldberg, ANS-EWS, P.O.Box 941, Richland, WA 99352 (email finfrock@ambinet.com).

SPECTRUM 2000, Chattanooga, Tennessee, Sept. 24-28, 2000. Contact: SPECTRUM 2000, University of Tennessee, Department of Nuclear Engineering, Knoxville, TN 37996-2300 (tel 865-974-5048, fax 419-828-4819, email spectrum2000@engr.utk.edu, url http://www.engr.utk.edu/spectrum/).

ICENES 2000, The 10th International Conference on Emerging Nuclear Energy Systems, Sept. 25-28, 2000, Petten, The Netherlands. Contact: Mrs. M. Hofman, Meeting Secretariat, NRG, P.O. Box 25, 1755 ZG Petten, The Netherlands (tel + 31-224-56-4193, fax + 31-224-56-3490, email hofman@nrg-nl.com, url http://www.nrg-nl.com/congres/icenes/).

YUNSC 2000, Oct 2-5, 2000, Belgrade, Yugoslavia. Contact: Radojko Pavlovi, YUNSC 2000 Conference Secretary, The VINCA Institute of Nuclear Sciences, P.O.B. 522, 11001 Belgrade, Yugoslavia (tel + 381-11-453-867, fax + 381-11-455-943, email yuns@rt270.vin.bg.ac.yu).

6th Annual Workshop on Monte Carlo Simulation of Radiotherapy Treatment Sources Using the OMEGA/BEAM Code System, Oct. 2-5, 2000, Ottawa, Canada. Contact: Blake Walters, Ionizing Radiation Standards, National Research Council of Canada, Ottawa, Canada, K1A 0R6. (tel 613-993-2715, fax 613-952-9865, email bwalters@irs.phy.nrc.ca, url www.irs.inms.nrc.ca/inms/irs/BEAM/beamhome.html).

2000 TLG Decommissioning Conference, Oct. 8-14, 2000, Captiva Island, FL, sponsored by TLG Services, Inc. Contact TLG Services, (tel 860-355-2300, fax 860-355-2705, url www.tlgservices.com/confrenc/confindx. htm).

MCNP and Visual Editor Training Course, Oct. 9-12, 2000, Richland, Washington. Contact: Randy Schwarz, MS K8-34, P. O. Box 999, Richland, WA 99352 (509-372-4042, fax 509-372-6421, email randy.schwarz@pnl.gov, url http://www.pnl.gov/eshs/software/ved.html).

2000 American Nuclear Society 14th Topical Meeting on the Technology of Fusion Energy, Oct. 15-19, 2000, Park City, Utah. Contact: url http://www.ambinet.com/ans/rps2000.htm.

International Symposium on Nuclear Techniques in Integrated Plant Nutrient, Water and Soil Management, Oct. 16-20, 2000, Vienna, Austria, sponsored by the International Atomic Energy Agency. Contact: IAEA, P.O. Box 100, Wagramerstrasse 5, A-1400 Vienna, Austria; (tel + 43 1 26000, fax + 43 1 26007, email official.mail@iaea.org).

4th International Workshop on Dosimetry for Radiation Processing, Oct. 22-27, 2000, San Diego, California. Contact: Dr. Harry Farrar IV, ASTM Committee E-10, 18 Flintlock Lane, Bell Canyon, CA 91307-1127 (tel 818-340-1227, fax 818-340-2132, email hfarrar4@aol.com).

International Conference on Advanced Monte Carlo for Radiation Physics, Particle Transport Simulation and Applications (MC2000), Oct. 23-26, 2000, Lisbon, Portugal. Contact: Intituto Tecnológico e Nuclear, MC2000 Conference Secretariat, Estrada Nacional 10, P-2686-953 Sacavem, Portugal (tel + 351-21-994 60 00 ext. 6154, fax + 351-21-994 10 39, email mc2000@itn1.itn.pt, or Dr. Pedro Vaz, Technical and Scientific Program Co-ordinator at email vaz@nea.fr, url http://lipulsi.lip.pt/mc2000/).

Annual Conference of the Bulgarian Nuclear Society, Oct. 25-27, 2000, Sofia, Bulgaria. Contact: Vesselin Bliznakov, BNS, 132, Blvd. Kl. Ohridski, 1756 Sofia, Bulgaria (fax + 359 2 621059), or Lilia Stoeva, (tel + 359 2 56 29 69, email lstoeva@solo.bg).

5th Radiation Physics Conference--Atomic Energy, Radiation Protection, Challenges and Strategies, Nov. 5-9, 2000, Cairo, Egypt. Contact: Prof. Mohammad A. Gomaa, Atomic Energy Authority, 3 Ahmad Al-Zomor St., Alzohour District, Nasr City, Children Village Post Office, Postal Code 11787, Cairo, Egypt (fax 00202-287603, email ruatom@rusys.EG.net).

2000 ANS/ENS International Meeting and Technology Exhibit, Nov. 12-16, 2000, Washington, D.C. Contact: Clyde Jupiter, general chair, (tel 301-946-8088, fax 301-946-6539, email clyde_jupiter@jupitercorp.com, url www.ans.org).

Radiation 2000, Nov. 26-28, 2000, Lucas Heights, Australia, sponsored by the Australian Institute of Nuclear Science and Engineering. Contact: Irene Parker, Radiation 2000, PMB 1, Menai NSW 2234 Australia (tel + 02 9717 3436, fax + 02 9717 9268, email ainse@ansto.gov.au, url www.ainse.edu.au/ainse/index.html).

86th Scientific Assembly and Annual Meeting of the Radiological Society of North America, Nov. 26- Dec. 1, 2000, Chicago, IL. Contact: RSNA, (tel 630-571-7850, fax 630-571-7837, email reginfo@rsna.org, url www.rsna.org).

Fifth Annual Nuclear Congress, Dec. 6-7, 2000, London, England, sponsored by the British Nuclear Energy Society and the British Nuclear Industry Forum. Contact: Sue Frye, ICE Conferences, 1-7 Great George St., London, SW1P 3AA U.K. (tel + 44 20 7665 2315, fax + 44 20 7233 1743, email frye_s@ice.org.uk, url www.bnes.com).

18th Nuclear Particle Physics Conference, Dec. 10-15, 2000, Adelaide, Australia, sponsored by the Australian Institute of Nuclear Science and Engineering. Contact: Irene Parker, AINSE, PMB 1, Menai NSW 2234 Australia, (tel + 02 9717 3436, fax +02 9717 9268, email ainse@ansto.gov.au, url www.ainse.edu.au).

Nucl. Technol., 126, 88-101 . . . DART Model for Irradiation - Induced Swelling of Uranium Silicide Dispersion Fuel Elements. . . . Rest, J.; Hofman, G.L. . . . April 1999 . . . Argonne National Laboratory, Arogonne, IL.

Nucl. Technol., 130, 227-241 . . . Plutonium Recycling in Pressurized Water Reactors: Influence of the Moderator-to-Fuel Ratio. . . . Kloosterman, J.L.; Bende, E.E. . . . June 2000 . . . Delft University of Technology, JB Delft, The Netherlands; NRG, Petten, The Netherlands.

Nucl. Technol., 130, 242-251 . . . A Recriticality-Free Fast Reactor Core Concept. . . . Sawada, T.; Ninokata, H.; Tomozoe, H.; Endo, H. . . . June 2000 . . . Tokyo Institute of Technology, Tokyo, Japan; FBR Engineering Company, Tokyo, Japan.

Nucl. Technol., 130, 282-295 . . . In-Core Fuel Management with Biased Multiobjective Function Optimization. . . . Shatilla, Y.A.; Little, D.C.; Penkrot, J.A.; Holland, R.A. . . . June 2000 . . . Westinghouse Electric Company, Pittsburgh, PA.

KEK Proceedings 99-15 . . . Proceedings of the Eighth EGS4 Users' Meeting in Japan (August 1-3, 1999). . . . Hirayama, H.; Namito, Y.; Ban, S., eds. . . . October 1999 . . . KEK, Tsukuba, Japan.

ORNL/TM-2000/129 . . . Neutron Total Cross Sections of 235U from Transmission Measurements in the Energy Range 2 keV to 300 keV and Statistical Model Analysis of the Data. . . . Derrien, H.; Harvey, J.A.; Larson, N.M.; Leal, L.C.; Wright, R.Q. . . . May 2000 . . . Oak Ridge National Laboratory, Oak Ridge, TN.

STI/PUB/1074 . . . Calibration of Radiation Protection Monitoring Instruments. . . . none listed . . . March 2000 . . . IAEA . . . IAEA . . . Safety Reports Series No. 16.

STI/PUB/1084 . . . Lessons Learned from Accidental Exposures in Radiotherapy. . . . none listed . . . April 2000 . . . IAEA . . . IAEA . . . Safety Reports Series No. 17.

A Note from the MCNP Team on the Los Alamos Fire

It's Sum-sum-summertime at RSICC

The End of an Era

NRC Codes Made Available

CHANGES TO THE COMPUTER CODE COLLECTION

Visitor

Obituaries

CONFERENCES, COURSES, SYMPOSIA

Practical MCNP for the Health /Medical Physicist & Rad Engineer

MCNP and Visual Editor Training Course

MCNP Workshops for the Year 2000

Calendar

JUNE ACCESSION OF LITERATURE

Radiation Shielding Literature