ORNL/TM-2010/220 Revision of the DELFIC Particle Activity Module September 2010 Prepared by David A. Hooper Vincent J. Jodoin DOCUMENT AVAILABILITY Reports produced after January 1, 1996, are generally available free via the U.S. Department of Energy (DOE) Information Bridge. Web site http://www.osti.gov/bridgeH Reports produced before January 1, 1996, may be purchased by members of the public from the following source. National Technical Information Service 5285 Port Royal Road Springfield, VA 22161 Telephone 703-605-6000 (1-800-553-6847) TDD 703-487-4639 Fax 703-605-6900 E-mail [email protected] Web site http://www.ntis.gov/support/ordernowabout.htmH Reports are available to DOE employees, DOE contractors, Energy Technology Data Exchange (ETDE) representatives, and International Nuclear Information System (INIS) representatives from the following source. Office of Scientific and Technical Information P.O. 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The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. ORNL/TM-2010/220 Nuclear Science and Technology Division REVISION OF THE DELFIC PARTICLE ACTIVITY MODULE David A. Hooper Vincent J. Jodoin Date Published: September 2010 Prepared by OAK RIDGE NATIONAL LABORATORY Oak Ridge, Tennessee 37831-6283 managed by UT-BATTELLE, LLC for the U.S. DEPARTMENT OF ENERGY under contract DE-AC05-00OR22725 CONTENTS LIST OF FIGURES ...................................................................................................................................... v LIST OF TABLES ...................................................................................................................................... vii ABBREVIATIONS ..................................................................................................................................... ix ACKNOWLEDGMENTS ........................................................................................................................... xi SUMMARY ............................................................................................................................................... xiii ABSTRACT ................................................................................................................................................ xv 1. BACKGROUND AND DEVELOPMENT ............................................................................................ 1 1.1 INTRODUCTION ......................................................................................................................... 1 1.2 BACKGROUND ........................................................................................................................... 1 1.3 BRANCH MERGING ................................................................................................................... 2 1.3.1 A Brief Statement of the Problem .................................................................................... 2 1.3.2 Original20B Treatment of Branch Merging ........................................................................... 3 1.3.3 1979 Treatment of Branch Merging—ABEGN Modification ......................................... 3 1.3.4 1992 Treatment of Branch Merging—BATMAN Correction ......................................... 5 1.3.5 Branch Merging Summary .............................................................................................. 6 1.4 NUCLIDE DESCRIPTION (NUCLID AND BREAKUP.DAT) ................................................. 6 1.4.1 1968 and 1979.................................................................................................................. 6 1.4.2 Limitations ....................................................................................................................... 8 +1.4.3 1992 ................................................................................................................................. 9 1.4.4 Comments ...................................................................................................................... 11 1.5 COMPARISON OF YIELD DATA FILES (TAPE20.DAT) ..................................................... 11 1.5.1 Cumulative Fission Yields ............................................................................................. 11 2. UPGRADES1B AND MODERNIZATION ............................................................................................. 13 2.1 INTRODUCTION ....................................................................................................................... 13 2.2 FISSION YIELD VERIFICATION AND UPGRADE .............................................................. 13 2.2.1 Comparison of DELFIC to ORIGEN ............................................................................ 13 2.2.2 Generation of BLOCKB.FOR ....................................................................................... 17 2.2.3 Generation of the New Fission Yields ........................................................................... 17 2.2.4 Comparison with Crocker’s Thermonuclear Yield ........................................................ 19 2.2.5 Branch Merging ............................................................................................................. 23 2.2.6 Generation of BREAKUP.DAT .................................................................................... 23 2.2.7 Decay Modes Update ..................................................................................................... 23 2.3 BATEMAN EQUATION SINGULARITY ................................................................................ 24 2.4 CONSERVATION OF FISSION PRODUCTS .......................................................................... 28 2.4.1 Input Deck Control ........................................................................................................ 28 2.5 EXPOSURE RATE MULTIPLIERS .......................................................................................... 28 2.5.1 Comparison of ERMs .................................................................................................... 29 2.5.2 Exposure Rate Comparison between 1979 and 2008 ERMs ......................................... 32 2.5.3 Summary Details of 2008 ERMs ................................................................................... 32 3. PROPOSED2B AND PENDING WORK ................................................................................................ 33 3.1 INTRODUCTION ....................................................................................................................... 33 3.2 DOSIMETRY .............................................................................................................................. 33 3.3 INDUCED ACTIVITY ............................................................................................................... 33 3.4 ACTINIDES ................................................................................................................................ 33 3.5 FRACTIONATION .................................................................................................................... 34 REFERENCES ........................................................................................................................................... 35 iii LIST OF FIGURES Figure Page 1 Branch merging example ........................................................................................................... 3 2 1968 fission yields for mass chain 133 (Tompkins 1968) ......................................................... 4 3 1979 fission yields for mass chain 133 (Norment 1979) ........................................................... 4 4 Comparison of fission yields for mass chains 86–90 ................................................................ 5 5 Binary description of NUCLID ................................................................................................. 7 6 Concatenated octal code for 72Co .............................................................................................. 8 7 Layout of the NUCLID data in SAIC’s BREAKUP.DAT ........................................................ 9 8 Generating the TN yield based on the number of prompt neutrons released .......................... 18 9 Comparison of the new U238TN yield with the U238FI and U238HE yields ........................ 19 10 Comparison of original 238U yields in DELFIC ...................................................................... 20 11 Comparison of Crocker’s U238TN yields in 1963 and 1968 .................................................. 21