RSIC Newsletter

Oak Ridge National Laboratory

Post Office Box 2008 Oak Ridge, Tennessee 37831-6362

managed by Lockheed Martin Energy Systems

for the U.S. Department of Energy

Phone No. 615-574-6176

FAX 615-574-6182



No. 368                                                      July 1995

Colors fade, temples crumble, empires fall, but wise words endure.--Thorndike

The International Criticality Safety Benchmark Evaluation Project

The U.S. Department of Energy established a project in October 1992 designed to:

1. Identify and evaluate a comprehensive set of critical-experiment benchmark data.

2. Verify the data, to the extent possible, by reviewing original and subsequently revised documentation, and by talking with the experimenters or individuals who are familiar with the experimenters or the experimental facility.

3. Compile the data into a standardized format.

4. Perform calculations of each experiment with standard criticality safety codes.

5. Formally document the work into a single source of verified benchmark critical data.

The Working Group first included criticality safety experts from the Idaho National Engineering Laboratory (INEL) and Los Alamos National Laboratory (LANL). The group soon expanded to include participants from the Hanford Site, Lawrence Livermore National Laboratory (LLNL) the Oak Ridge Y-12 Plant, the Rocky Flats Plant, and the Savannah River Site. By 1994 an international component was added to the project with the participation of representatives from the United Kingdom, Japan, the Russian Federation, France, and Hungary. In December 1994 the Nuclear Energy Agency Nuclear Science Bureau of the Organization for Economic Coopera tion and Development voted to include the project as an official activity. The project is now known as the International Criticality Safety Benchmark Evaluation Project (ICSBEP).

International Handbook of Evaluation Criticality Safety Benchmark Experiments documents the work performed by ICSBEP. The handbook was first published in May 1995. It is organized into seven volumes; the first six volumes contain 46 evaluations with benchmark specifications for 376 critical or near critical configurations; volume seven, Special Isotope Systems, presently has no entries. The OECD-NEA will be responsible for distribution of the document, which will soon be published on CD-ROM and will be available on the World-Wide Web to participating countries. For additional information you may contact J. Blair Briggs at INEL, P.O. Box 1625, Idaho Falls, ID 83415-3890 (phone 208-526-7628; fax 208-526-0528) or Enrico Sartori at OECD-NEA, Le Seine Saint-Germain, 12 Boulevard des Illes, F-92130 Issy-les-Moulineaux, Paris, France (phone 33 1 4524 1072; fax 33 1 4524 1110).


Four changes were made to the computer code collection during the month. Four new code systems were packaged and added to the collection. Two changes resulted from foreign contributions.



Language: Fortran 77

Computers: IBM RS/6000

Format: DOSOak Ridge National Laboratory contributed this one-dimensional, discrete ordinates transport code system with anisotropic scattering. GBANISN (GroupBand ANISN) is a modified version of CCC-254/ANISN-ORNL with an option to randomize multiband fluxes within a group at all interfaces between dissimilar materials. "Inner iterations" are performed over energy groups within a "band," and groups are converged before moving to the next band. These inner iterations slightly resemble outer iterations in ANISN. Thus, a calculation with upscatter and no fission can be solved with one traditional outer iteration. GBANISN, like ANISN, includes a technique for handling general anisotropic scattering, pointwise convergence criteria, and alternate step function difference equations that effectively remove the oscillating flux distributions sometimes found in discrete ordinates solutions.

GBANISN is operable on IBM RS/6000 computers using the AIX XLF FORTRAN 2.2 compiler and the AIX XLC 2.2 compiler. The package is transmitted on one DS/HD 3.5-in. (1.44 MB) diskette in self-extracting compressed DOS files. References: Informal Notes (June 1994), K-1693 (March 1967), NAA-SR-10951 (March 1966). Fortran 77, C (C00628/IRISC/00)



Language: Fortran

Computers: PC

Format: DOS

Westinghouse Hanford Company, Richland, Washington, contributed a kernel integration shielding code system for simple arrangements of source and shields. ISO-PC calculates dose rates from the decay of radionuclides at the exterior of simple geometric shapes. The dose rates from X-rays, gammas, and bremsstrahlung radiation are computed. ISO-PC is a revision of the CCC-079/ISOSHLD-II program and corrects all known errors in ISOSHLD-II. Both the Radio-Isotope Buildup and Decay (RIBD) program and the non-uniform source parameter, SSV1, were removed. There are three new namelist variables, 25 additional shielding materials, and 5 more energy groups. The attenuation and buildup calculation does not use the recent data found in ANSI/ANS-6.4.3-1991. The differences are small for all materials except water, for which the new data predict much smaller buildup. This version works with photon energies from 10 keV to 10 MeV, using 30 energy groups.

The Lahey Computer Systems F77L-EM/32 Version 5.01 compiler was used to create the executable included in the package which runs on IBM and compatible personal computers under DOS version 3 or higher. Executables are included for both 80286 (without a numeric data processor) and 80386 (with a numeric data processor) CPUs. References: WHC-SD-WM-UM-030 (1995), BNWL-236 (1966) and BNWL-236-SUP1 (1967). Fortran; IBM PC (C00636/IBMPC/00).



Language: C and Assembler

Computers: PC

Format: DOS

The Institute of Nuclear Research and Nuclear Energy, Sofia, Bulgaria, contributed this code system for gamma-ray spectra analysis. ANA performs peak search, calculation of peak parameters, and evaluation of series of routine measurements. An external program KATOK, developed at JINR, Dubna in the former Soviet Union, calculates peak parameters, position, net area, FWHM, and its uncertainties. KATOK is a nonlinear least squares program which uses a composite algorithm, including Newton-Gauss method, Newton-Gauss regularized method, and Marquard regularized method, and automatic regime switching.

ANA is written in C language and uses the BORLANDC 3.1 compiler. Some assembler language is included. Both source and executable files for ANA are in the distribution. Only the executable for KATOK is included. The system runs on IBM PC or compatibles with an 80286 or greater processor. A math coprocessor is recommended but not required. One DS/HD 3.5-in. (1.44 MB) diskette written in self-extracting compressed DOS files is required for transmittal. Reference: Informal document (1993). C and Assembler; IBM PC (P00356/IBMPC/00).



Language: Fortran 77

Computers: VAX, PC

Format: DOS

The Laboratory of Theoretical Physics, Joint Institute for Nuclear Research in Moscow, Russian Federation, contributed this Monte Carlo code system to calculate nuclear reactions in the framework of the Cascade-Exciton Model (CEM) of nuclear reactions. CEM95 calculates reaction, elastic, fission and total cross-sections; nuclear fissilities; excitation functions; nuclide distributions; energy and angular spectra; double-differential cross-sections; mean multiplicities, i.e., the number of ejectiles per incident bombarding particle; ejectile yields; mean energies and production cross sections. Reactions induced by nucleons and pions for carbon and heavier targets and incident energies from approximately 10 MeV up to several GeV can be computed. The present code is an extended version of CEM92M.

CEM95 is written in Fortran 77 and runs on Vax computers under VMS. It also runs on IBM Personal Computers. The Microsoft Fortran compiler, Version 5.1 was used to create the executable included in this package, which is transmitted on one DS/HD 3.5-in. (1.44 MB) diskette in self-extracting compressed DOS files. References: Informal report (1995). Fortran 77; VAX and IBM PC (P00357/MNYCP/00).


One existing data library was updated during the month.


OP SYS: all

Language: Fortran 77

Computers: all

Format: tar This package of ENDF-B/VI derived standard neutron, photon interaction, and electron cross sections for use with CCC-200/MCNP4A has been updated by Los Alamos National Laboratory with the addition of an information file about the ENDF60 data library. It details some problems detected with further testing. Instructions are provided for the user who wishes to correct his set of data files. Many users have already received the file directly from LANL. Those who did not and want a copy may contact RSIC. The changes will be appplied to the next standard release of MCNP libraries. References: LA-12891 (Dec. 1994). Fortran; All Computers (D00181/ALLCP/00).


In serving a specialized area of scientific endeavor, it seems important that we note significant changes in the activities of people concerned with radiation protection, transport, and shielding in the nuclear industry. We, therefore, continue to carry personal items as they are brought to our attention.

Dr. Yousry Y. Azmy, a research scientist in the Computational Physics and Engineering Division of the Department of Energy's (DOE) Oak Ridge National Laboratory, has been selected to receive the American Nuclear Society's (ANS) 1995 Young Member Engineering Achievement Award. Azmy, who has worked at ORNL since 1986, was selected for significant and innovative development of solving equations in nuclear applications and implementing them on advanced multiprocessor computers. The award identifies and rewards meritorious contributions to the nuclear engineering profession by members who are in the early stages of their careers, and is intended to stimulate further achievements by young individuals to enhance engineering in the nuclear energy field. Azmy is a member of the ANS and the Phi Kappa Phi professional organization. He earned a bachelor's degree from the University of Alexandria (Egypt) and a master's degree and doctorate from the University of Illinois.


RSIC 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 to RSIC.

HIGH PERFORMANCE COMPUTING '96: Grand Challenges in Computer Simulation

High Performance Computing '96: Grand Challenges in Computer Simulation, sponsored by the Society for Computer Simulation, will be held April 8-11, 1996, in New Orleans, Louisiana. The 1996 International Simulation Conference will feature the Fourth Special Symposium devoted to the impact of High Performance Computing on Computer Simulation. Prospective authors are invited to submit abstracts describing their work in the following areas:

(1) high performance computing applications;

(2) parallel algorithms and numerical methods;

(3) methodologies to exploit HPC architectures and communication networks;

(4) visualization and validation of large scale computer simulations.

The goal of the Symposium is to encourage innovation in High Performance Computing Technologies and to stimulate the use of these technologies in key areas of Computer Simulation. It will promote the exchange of ideas and information between universities, industry, and national laboratories supporting the development of High Performance Computing Applications which can provide solutions to current scientific and technical challenges. High Performance Computing Applications of interest include (but are not limited to):

* 3-D Computational Fluid Dynamics Models

* Combustion Systems simulation

* Predictions of weather, climate, and global changes

* Models of turbulence in fluid flows

* Computational solid mechanics applications

* Nuclear reactor safety analysis

* Computational ocean sciences and systems

* Computational Chemistry

* Life Sciences and Medical Applications

* Automotive Applications

* Intelligent Transportation Systems Simulation

Three (3) copies of 400-word abstracts or a full paper for review must be submitted to session organizers by September 29, 1995. Notification of acceptance and author kits will be mailed by October 20, 1995. Camera-ready copy must be submitted to Society headquarters by January 8, 1996. Only previously unpublished work will be considered and, if accepted, will be published in the proceedings of the conference. Submit abstracts/papers with authors' complete addresses, phone, fax, and e-mail for consideration to: Dr. Adrian Tentner, Chairman, High Performance Computing '96, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439 (e-mail: or High Performance Computing '96, The Society for Computer Simulation, P.O.Box 17900, San Diego, CA 92177 (phone 619-277-3888, fax 619-277-3930; e-mail: ).

MCNP Course Announcements

Group XTM at Los Alamos National Laboratory is offering two MCNP classes during the fall. Introduction to MCNP will be held September 12-15, and Criticality Calculations with MCNP will be held October 17-20. Both classes will be held at Los Alamos National Laboratory. Enrollment is limited so it is advisable to get your registration in early. A brief description of the classes follows.

Introduction to MCNPis for people who have never used MCNP or have very limited experience with the code. Instruction will include interactive computer sessions. Time will be available to discuss individual questions and problems with MCNP experts or to pursue in more detail topics mentioned in the talks. Topics to be covered include: Basic and advanced geometry; Source definitions; Tallies; Data; Variance reduction; Statistical analysis; Criticality; Plotting of geometry, tallies, and particle tracks; and Neutron/photon/electron physics. Participants are expected to have little or no experience with MCNP. Some knowledge of UNIX is required. A manual will be provided for use while in the classroom.

Criticality Calculations with MCNP will feature advanced MCNP geometries using the new MCNP criticality primer. Setting up complex geometries easily, with emphasis on setting up accurate problem representations, and the new MCNP4A criticality features will be presented. An interactive hands-on computer experience is provided using progressively more advanced example problems.

One Day Tutorial for Novice Users will be held Monday, Oct. 16, for participants who have very limited or no experience with MCNP to get them up to speed for the following four days. If you have no UNIX experience, you are also encouraged to attend. The Monday class includes interactive computer sessions. If you do not attend the Monday class, you are expected to have some familiarity with MCNP. Some knowledge of UNIX is required because UNIX-based workstations will be used in class. A manual will be provided for use while in the classroom. Time will be available to discuss individual questions and problems with MCNP experts or to pursue in more detail topics mentioned in the talks.

Address all correspondence regarding this class to Judith Briesmeister, or contact by telephone 505-667-7277 or fax 505-665-5538.


Your attention is directed to the following events of interest.

August 1995

10th Brazilian Meeting on Reactor Physics and Thermal Hydraulics (X ENFIR) and the 3rd Brazilian Meeting on Nuclear Applications (III ENAN), Aug. 7-11, 1995, Rio de Janeiro, Brazil. Contact: Wilma S. Bastos, IEN, C.P. 68550, CEP-21945.970, RJ, Brazil (fax 55-21-5902692: email IENRCB@BRLNCC.BITNET).

Environmental Remediation Conference: Committed To Results, Aug. 13-18, 1995, Denver, Colorado. Contact: Environmental Resources Specialist, Inc., P.O. Box 440112, Aurora, CO 80044 (phone 303-690-4245).

Computational Methods in Reactor Analysis and Shielding, Aug. 14-18, 1995, Knoxville, Tennessee, a short course offered by the University of Tennessee-Knoxville. Contact: T. W. Kerlin, Dept. of Nuclear Engineering, University of Tennessee, Knoxville, TN 37996-2300 (phone 615-974-2525 (fax 615-974-0668).

Nuclear Criticality Safety, Aug. 14-18, 1995, Knoxville, Tennessee, a short course offered by the University of Tennessee-Knoxville. Contact: T. W. Kerlin, Dept. of Nuclear Engineering, University of Tennessee, Knoxville, TN 37996-2300 (phone 615-974-2525 (fax 615-974-0668).

Safe Use of Radionuclides, August 21-25, 1995, in Oak Ridge, Tennessee, a short course sponsored by Oak Ridge Associated Universities. Contact: Registrar Professional Training Programs, Oak Ridge Associated Universities, P.O. Box 117, Oak Ridge, TN 37831-0117 (phone 615-576-3576 or 615-241-4888; fax 615-576-9383).

Symposium on Tomography in Nuclear Medicine: Present Status and Future Prospects, Aug. 21-25, 1995, Vienna, Austria. Contact: IAEA (phone 43-1-2360-1310; fax 43-1-234564).

International Nuclear Physics Conference, Aug. 21-26, 1995, Beijing, China. Contact: INPC '95 (phone 86-1-935-7787; fax 86-1-935-7008).

5th Workshop on Heavy Charged Particles in Biology and Medicine, Aug. 23-25, 1995, Darmstadt, Germany. Contact: GSI Biophysik, Herr G. Kraft, Planckstr. 12, D-64291, Darmstadt, Germany (fax 49-6151-3592106).

10th International Congress of Radiation Research, Aug. 27-Sept. 1, 1995, Würzburg, Germany. Contact: Congress Secretariat (phone 49-89-3187-2669; fax 49-89-3187-3362).

Seminar on Requirements for the Safe Management of Radioactive Waste, Aug. 28-Sept. 1, 1995, Vienna, Austria. Contact: IAEA (43-1-2360-1310; fax 43-1-234564).

September 1995

5th International Conference on Radioactive Waste Management and Environmental Remediation, Sept. 3-9, 1995, Berlin, Germany. Contact: ASME Headquarters, Ms. L. Friedman, 345 East 47th St., New York, NY 10017-2392 (fax 212-705-7856) or Battelle Pacific Northwest Laboratory, MSIN K1-19, SC Slate, P.O. Box 999, Richland, WA 99352 (fax 509-375-5963).

VOLGA-95, Sept. 4-8, 1995, in Volga, Russia. Contact: Prof. V. Khromov, Department Head, Chairman of Organizing Committee, Prof. V. Naumov, Program Chairman, or Dr. L. Goncharov, Scientific Secretary at the Moscow Engineering Physics Institute, Kashirskoe Shosse 31, Moscow, 115409, Russia (phone +7-095-323-9242; fax +7-095-324-7026; email

4th European Space Power Conference, Sept. 4-8, 1995, Poitiers, France. Contact: ESTEC, Power and Energy Conversion Div., Ms. J. Sanchez-Michielsen, P.O. Box 299, NL-2200, AG Noordwijk, Netherlands, or ESA Publications Division, T. D. Guyenne, NL-2200, AG Noordwijk, Netherlands (fax 31-1719-85433).

International Conference on Evaluation of Emerging Nuclear Fuel Cycle Systems (GLOBAL'95), Sept. 11-14, 1995, Palais des Congres, Versailles, France. Contact: Massimo Salvatores, CE/CADARACHE, DRN, Bat. 707, F-13108 ST. Paul-lez Durance Cedex, France (phone +33 42 25 33 65; fax: +33 42 25 41 42; internet :

Environmental Monitoring, Sept. 11-15, 1995, in Oak Ridge, Tennessee, a short course sponsored by Oak Ridge Associated Universities. Contact: Registrar Professional Training Programs, Oak Ridge Associated Universities, P.O. Box 117, Oak Ridge, TN 37831-0117 (phone 615-576-3576 or 615-241-4888; fax 615-576-9383).

Fifth International Conference on Nuclear Criticality Safety (ICNC'95), Sept. 17-22, 1995, Albuquerque, New Mexico. Contact: R. Douglas O'Dell, ESH-6, MS F691, P.O. Box 1663, Los Alamos National Laboratory, Los Alamos, NM 87545 (phone 505-667-4614; fax 505-665-4970; email

3rd European Symposium on Radiations and Their Effects on Components and Systems, Sept. 18-22, 1995, Arcachon, France. Contact Europa Organisation, 40 Blvd. de Recollets, F-31405, Toulouse Cedex, France (fax 33-61 32 6600).

Applied Health Physics, Sept. 18-Oct. 20, 1995, in Oak Ridge, Tennessee, a five-week course sponsored by Oak Ridge Associated Universities. Contact: Registrar Professional Training Programs, Oak Ridge Associated Universities, P.O. Box 117, Oak Ridge TN 37831-0117 (phone 615-576-3576 or 615-241-4888; fax 615-576-9383).

7th International Conference on Fusion Reactor Materials, Sept. 25-29, 1995, Obninsk, Russian Federation. Contact: Inst. of Physics and Power Engineering, Prof. V. M. Chernov, 249020, Obninsk, Kaluga Region, Russian Federation (fax 007-095-230-2326).

16th Symposium on Fusion Engineering, Sept. 30-Oct. 4, 1995, Urbana, Illinois. Contact: Cella Elliott, Conference Secretary, Fusion Studies Lab., University of Illinois, Urbana, IL 61801 (phone 217-333-2772; fax 217-333-2906; email miley@uiucvmd.bitnet).

October 1995

3rd International Workshop on Dosimetry for Radiation Processing, Oct. 1-6, 1995, Québec, Canada. Contact: John D. Rickey, Far West Technology, Inc., 330 D S. Kellogg, Goleta, CA 93117 USA (phone 805-964-3615; fax 805-964-3162).

International Conference on Radiation Dose Management, Oct. 3-5, 1995, Windermere, United Kingdom. Contact: European Nuclear Society, Belpstrasse 23, CH-3007, Bern, Switzerland.

Radiation Risk, Risk Perception, and Social Constructions Seminar, Oct. 19-20, 1995, Oslo, Norway, sponsored by the Norwegian Radiation Protection Authority and the Swedish Radiation Protection Institute. Contact: Per Strand, Norwegian Radiation Protection Authority, P.O. Box 55, N-1345 Osteras, Norway.

International Symposium on Nuclear Energy, Oct. 20-21, 1995, Bucharest, Romania. Contact: C. Briatianu, Univ. Politechnicadin Bucuresti, Facultateade Inginerie Mecanica, Splaiul Independentei Nr. 313, Sector 6, 77206, Bucharest, Romania (phone 40-1-6314010/224).

Annual Meeting of the Society for Industrial and Applied Mathematics, Oct. 23-26, 1995, Charlotte, North Carolina. Contact: Soc. for Indus. and App. Math., 3600 University City Sciences Center, Philadelphia, PA 19104-2688 (fax 215-386-7999, email

ANS Winter Meeting, Oct. 30-Nov. 2, 1995, San Francisco. Contact: ANS, 555 N. Kensington Ae., La Grange Park, IL 60545.

November 1995

International High-Level Radioactive Waste Management, Nov. 11, 1995, Las Vegas, Nevada. Contact: Allen G. Croff, ANS, 555 N. Kensington Ave., La Grange Park, IL 60525.

Environment Safety and Health Conference, Nov. 13-17, 1995, Denver, Colorado. Contact: Eleanor Crampton, U.S. Department of Energy, EH-51, 270CC Washington, DC 20875-0963 (301-903-3732).

ANS International Topical Meeting on Managing Plant Life, Nov. 28-30, 1995, Nice, France. Contact: Dr. S. Charbonneau, Tour Fiat, Cedex 16, F-92024, Paris, France.

December 1995

11th International Conference on Packaging and Transportation of Radioactive Materials, Dec. 3-8, 1995, Las Vegas, Nevada. Contact: Laura Dechter, Social & Scientific Systems, Inc., 7101 Wisconsin Ave., Bethesda, MD 20814-4805 (phone 301-986-4870; fax 301-913-0351).

January 1996

29th Midyear Topical Meeting of the Health Physics Society: Naturally Occuring and Accelerator Produced Radioactive Material--Regulation and Risk Assessment, Jan 7-10, 1996, Scottsdale, Arizona. Contact: HPS Secretariat, Suite 402, 1313 Dolley Madison Blvd., McLean, VA 22101.

96th Annual Meeting of the American College of Nuclear Physicians, Jan. 14-18, 1996, San Juan, Puerto Rico. Contact: American College of Nuclear Physicians, Mr. H. Johnson, Suite 700, 1101 Connecticut Ave., NW, Washington, DC 20036.

February 1996

Waste Management Meeting: HLW, LLW, Mixed Wastes and Environmental Restoration -- Working Towards a Cleaner Environment, Feb. 25-29, 1996, Tucson, Arizona. Contact: WM Symposia, Inc. 245 South Plumer, Suite 19, Tucson, AZ 85719 (fax 520-792-3993).

March 1996

3rd ASME/JSME International Conference on Nuclear Engineering, Mar. 10-13, 1996, New Orleans, Louisiana. Contact: ASME Meetings Dept., P.O. Box 2900, 22 Law Drive, Fairfield, NJ 07007-2900 USA (fax: 201-882-1717 or 201-882-5155; email:

1996 HEART Conference, Mar. 1821, 1996, Orlando, Florida. Contact: William A. Seidler, JAYCOR, Suite 110, 4970 Corporate Drive, Huntsvill, AL 35805 (phone 205-837-9100).

April 1996

Annual Meeting of the National Council on Radiation Protection and Measurements, Apr. 3-4, 1996, Arlington, Virginia. Contact: Natl. Council on Radiation, Protection and Measurements, Suite 800, 7910 Woodmont Ave., Bethesda, MD 20814 (fax 301-907-8768).

U.S. Nuclear Regulatory Commission Regulatory Information Conference, Apr. 9-11, 1996, Washington, D.C. Contact: Anna May Haycraft, U. S. NRC, Office of NRR, 12H5, Washington, DC 20555 (phone 301-504-3075).

Annual Meeting of the Radiation Research Society, Apr. 13-18, 1996, Chicago, Illinois. Contact: Radiation Research Society, M. G. Watson, Suite 600, 2021 Spring Rd., Oak Brook, IL 60521.

IRPA9, 1996 International Congress on Radiation Protection, Apr. 14-19, 1996, Vienna, Austria. Contact: Congress Secretariat, IRPA9 Congress Organizing Committee, Austropa-Interconvention, P.O. Box 30, A-1043 Vienna, Austria.

Radiation Protection and Shielding Division Topical Meeting on Advancements and Applications in Radiation Protection and Shielding, Apr. 21-25, 1996, Falmouth, Massachusetts. Contact Keith Spinney, Yankee Atomic Electric Company, 580 Main St., Boston, MA 01740-1398 (phone 508-779-6711 x 2039; fax 508-779-6730; email

International High-Level Radioactive Waste Management Conference, Apr. 29-May 3, 1996, Las Vegas, Nevado, sponsored by the American Nuclear Society. Contact: ANS, Meetings Dept. 555 North Kensington Ave., La Grange Park, IL 60525 (fax 708-352-6464).

July 1996

38th Annual Meeting of the American Association of Physicists in Medicine, July 21-25, 1996, Philadelphia, Pennsylvania. Contact: Ms. A. R. Keyser, One Physics Ellipse, College Park, MD 20740-3846 (fax 301-209-0862).

November 1996

International Meeting of the American Nuclear Society and the European Nuclear Society, Nov. 10-15, 1996, Washington, DC. Contact: Meetings, ANS, 555 N. Kensington Ave., La Grange Park, IL 60525 (phone: 708-352-6611; fax: 708-352-6464).