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PROJECT AND SUDGET PRCPCSAL FOR NRC WCRK g;ulr19A1 ..
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PROJECT AND BUOGET PROPOSAL FOR NRC WORK or2""O July 1983 eaQ44GI T& T6a Examinacion of OfI-2 Nel Speci:nens aos PaoPosiae oaoaaization Argonne Nacional Laboratory PcMEcAsr V LasfcNE cxART: se.am ca scare - M -c.uno ishe== m quarrer ran PMOv10E ESTIMATED COLLAM Co3T PCM EACH TASK PCM EACM PISCAL YEAR av AscJ eav lads isy 1985 '#v 1966 #8v L95/
f u I2nel 3re lem i tw i:ne l3re l del f n 1:nel 3rel em i t a l 2nel 3rei den t f a l :nel 3rel em Examinacion Planning
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l ,' ,' ,' A cost $73g l $201K l $370K ! $504K l $150K Equipmenc Procurament
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TOTAL EsfiMATwo PMCJECT Cos? $113g $254K* $370K $504K $207K eMoasc7 cEsemPfioN: .w _ . _- : , e. t _ .e . ., ,,. Ar== ==m.,c.== wee., iss.,em,r See attached sheets.
- Includes $74K carryover from FT 83.
- 1. CEJECTIVE OF PMCPCSED WORK
- 2.
SUMMARY
CP PMICM EPPCRT5 1 WCMK TO E8 PEMPCRMEO ANO EXPECTED MEsuLTS 3
- 4. OtscMIPT1CN CP ANY POLLOW4N EPPCMT3
- 5. aELAftCNsHip TC OTHER PMCJECT3 E. REPCMTING scHECULs
- f. SutCCNTRACTCM INPCMMATION
- r E. Usf NEW cAPtTAL ECuiPMENT MScuiMEO I
s, cEscMtEE sPEctAL PActuTTEs MEcuiMeo
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- 1. Objective of Proposed Work The objective of the proposed work is to determine, through detailed hot-con esaminations,. the physical, metallurgical, and chemical changes that occurred in TMI-2 coes noterials during the accident of March 28, 1979. Rose determinations win be used to supply the data needs for 1) reconstruction of the accident sequence, 2) analytical tool development, 3) establishment of future licensing criteria 4) methods for accident aitigation and safety, and .
, 3) future designs, operation, or amintenance. The hot-ce u esaminations will be preceded by estensive planning to assure that the correct data are obtained and that the capability is in hand to obtain that data. Such plans will derive from interfacing with pertinent NEC/ DOE /EFRI planning committees. This propoesi addresses the M---W and preparation activities that will lead to-the later e===f antions in the Argonne hot-cells.
- 2. Samary of Prior Efforts Past Years Argonne has had estensive interaction with the NRC/ DOE /EFRI 7.4 Subcommittee responsibis for reviewing and recommending analytical techniques for esamining the M-1 fuel and core components. Much of the methodology included in the subcomLittee's final report was derived from ANL's recommendations. Argonna's esperience in this area comes from anny years of ====ining severely damaged fast reactor safety tests conducted in the TREAT and ETE reactors. In the IRR area, we have conducted asterials research programs for ifRC and EFRI on fission-gas behavior during accident situations, mechanical property studies of irradiated and unirradiated Ziresloy cladding, the analysis of fission products released to the fuel / cladding gap, the susceptibility of Zircaloy to stress-corrosion failure owing to these fission products, and the esamination of U0t -Ziresloy reactions in irradiated specimens from tests conducted at Cusn.. The personnel expertise and hot-cell capabilities developed -
through these programe will constitute a firm foundation for the examination and evolustion of the TMI-2 core asterials at ANL.
In FY 1982 an interface uns established with EC&G, the lead DOE i contractor in the TMI-2 core evaluation. This interface led to ANL I
having input to the EC&G draft plan for the esamination of the core l asterials. Also, ANL arranged with EG&G to examine samples of the l
I filtrate recovered from IMI-2's filtering system shortly after the accident. This esamination was coordinated with the examinations performed at EC&G and LANL.
An evaluation mes ande of ANL's capabilities in the area of irradiated j asterials cha.acterisation. Because of ANL's esisting strong base of i sophisticated equipment (SEM, TIM, scanning and ESCA Auger analysis, and
- electron and ion alcroprobe analysis), only a computer to control Auger i data collection and analysis was identified now as a necessary new equipment ites. . . . - -
I ANL was requested by NRC-RSR to prepare a number of samples of synthetic
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I core debris that night resemble similar combinations of materials in the
[ TMI-2 core debris. The intent of this Limited effort una to see if I
f configurations could be generated by induction heating that resemble debris observed in the mid-summer T7 examination of the core. Effort was devoted to obtaining specimen materials and readying an induction furnace.
In IT 1983 three samples of filter debris received from EC&G were examined to characterias the debris by size, shape and chemical composition. Examinations carried out included visual inspections, metallography, SEN, and gams spectroscopy. The filtrate was found to contain particles of 00 , oxidised and unexidized Zr, Ag-In-Cd, stainless steel (control rod el ing), and Inconel 718 (bundle straps). Fission products were present in relatively small quantities. The results of the examinations were combined with those of EG&G and Luft in a joint report.
The effort to generate synthetic core debris was completed. Combinations of asterials investigated were stainless steel /Zircaloy, Zircaloy/Inconel 718 Ag-In-cd/ stainless steel, and Zircaloy/CO2 . The environment for the tests was flowing argong no attempt was made to simulate the acre likely environment during the accident. However, in the first test with atainlese seeel/Zircaloy, perhape because of incomplete syecen purging, the Zircaloy underwent a rapid emotherinic reaction at ~1700'C.
,iubsequent tests only resulted in the expected eutectic formation. The Zircaloy/UO2 tests resulted*in eutectic reaction with the reaction product escaping along grain boundaries through the cladding.
A continuing dialogue was maintained with EC&G on obtaining one or more grab samples of core debris. Originally scheduled for May, obtaining the grab semples from the core was delayed until the end of IT 1983.
ML's thoughts on how NRC's examination objectives could be optimally '
served within espected budgetary constraints were conveyed by lette't to the NRC. This letter contained an examination approach for ANL, how ANL's role fitted with those of other laboratories expected to be involved, and examination cost estiances.
- 3. Work to be Performed and Erpected Results PT 1984 The emanination of the grab semples that were obtained in IT 1983 will be completed and a report issued. As the core recovery operations gain assentum at MI, it is anticipated that more semples will % meived at ANL for examination. These esaminations will be very specific caing ANL's capabilities for optical and electron microscopy I-ray saalysist electron, ion, and Auger microprobe analyses and chemical analyses.
Preparations will continue at ANL for receiving the principal THI samples in FT 1985 during the major core recovery operations. These preparations will consist of a continued upgrading of our equipment and examination techniques.
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FY 1985 It is expected that ML's principal O!I activities will occur in this year when core recovery and examination operations go into full swing.
It is anticipated that ML will receive representative samples of the various core regions of interest, i.e. rubble, portions of partially damaged subassemblies, portions of intact subassemblies, and portions of the upper and lower plenums. ML's ex=4 nation of these components will be only a part of the total examination to be conducted by participating laboratories. However, this sampling will allow ML to provide the NRC with a self-consistent set of data on fission-product distributions, asterials interactions, core temperatures, and core damage.
l 4 Description of Ib11ow4n Efforts It is anticipated that the deca 11ed MI-2 examination efforts will continue through IT 1986. This will include data collection, evaluation, reporting, and disposal of radioactive unstes from the hot-cell. In addition, it can be espected the examination results will create spin-off studies of i
fuel and cladding properties, fission-product behavior under extrmee
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i conditions, and phase diagrams. These efforts could carry the program through FY 1988, d---aMag upon when they were started.
- 5. Relationshio to Other projetts It is expected that the principal OtI-2 core examination will be carried i
out under DOE auspices at a number of hot-cell facilities in the country to maximise the benefits of the available expertise and capabilities. It is now anticipated that the larger portions of the core will be first sent to the EG4C hot-cell for disassembly and subsequent dissemination of smaller units to sacallite hot-calls. tJe presently view ML in the role of one of the sacallite facilities for the detailed, in-depth examinations. However, some of the smaller samples could be received directly at MI The work would be l
i coordinated by EC&G's Technical Integration Office for OtI-2 activities. Ihe ML activities for the Ntc are anticipated to be beyond those required or '
funded by DOE.
- 6. Raporting Schedule FY 1983 l Fmination of StI-2 Filter Debris, R. 7. Strain, J. E. Sanecki, and j ! A. Neimark, June 1983 (with EG4C and I.ML) .
Preparation and Interpretation of Synthetic OtI-2 Core Debiis, R. V. Strain and ! A. Neisark, September 1983.
FY 1984 l'
Examination of DtI-2 Core Debris " Grab" Sample, R. 7 Strain and I. A. Neimark, September 1984 e
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- 7. Subcontractor Information Not applicable.
- 8. New Caoital Eeuiseent Raouired A necessary new equipment ites is a computer to control data collectica and analysis for the scanning Auger alcroprobe. The present systa requires a laborious and time conoming manual data reduction. The computer would control data collection, evaluate the raw data, and present it in a readily smiderstandable format. The total cost is estimated to be $46,000; however, this cost will also be borne by other programs (including NRC FIN No. A2232, Posttest Rael Imamination (OtarL Fissica Product Release Test Specimens)j.
- 9. Special Facilities Raouired The 1MI-1 core asterials asamination will be done in the Alpha-Gamma Hot Call flacility at ANL-East. This facility has been engaged in reactor fuels and asterials work for 19 years. Over the years its forts has become the in-depth esamination of irradiated esterials using a wide variety of esamination techniques and sophisticated equipment. The facility's uniqueness derives
- from three principal sources: 1) a staff of senior esterials people with C estensive esperience in tederstdading enterials behavior; 2) an array of electron bem instruments adapted for interrogating irradiated asterials -
including a scanning electros microscope, a scanning Anger microprobe, and an electron microprobe had 3) proximity to other analytical instrmests at ANL-E euch as e ion microprobe and an ISCA Anger tait that are also capable of
. handling irradiated materials. The facility currently supports programs totaling approximately $1.7M anually, including the costs to operate the facility and the belance of the programmatic effort. To replace such a facility umuld cost about $30N and require about six years.
- 10. Conflict of Daterest Inforestion Argonne National laboratory presently conducts research for IRC and no conflict of interest is involved.
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