ML20039E830
| ML20039E830 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 07/10/1981 |
| From: | BECHTEL GROUP, INC. |
| To: | CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| Shared Package | |
| ML20038B946 | List:
|
| References | |
| CON-7220 E-18(Q), NUDOCS 8201110507 | |
| Download: ML20039E830 (1) | |
Text
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INTERIM REPORT g
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Accession No.
4 Contract Program or Project
Title:
BWR REFILL-REFLOOD PROGRAM i
a Subject of this Document:
PROGRAM PROGRESS Type of Docurnent:
MONTHLY LETTER Author (s):
J.C. BLACK Date of Document:
DECEMBER 1981 Responsible NRC Individual and NRC Office or Division: '
W.D. BECKNER This document was prepared primarily for preliminary or internal use. 'It has not received full review anc approval. Since there may be substantive changes, this document should not be considered final.
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Prepared for U.S. Nuclear Regulatory Commission Washington. D.C. 20555 INTERIM REPORT
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G E N ER AL[h E LE CTRIC NUCLEAR ENERGY DUSINESS GHOUP GENERAL ELECTRIC COMPANY,175 CURTNER AVE., SAN JOSE, CALIF"CRNIA 95125 Mail Code 583 JCB-06-82 January 11, 1982 Mr. iEdward L. Italman, Director
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Division of Contracts.
U.S. Nuclear Regulatory Comission Washington, D.C.
20555 Dr. H. Merilo Safety & Analysis Department Electric Power Rese>rch Institute P.O. Box 10412 Palo Alto, CA 94303
SUBJECT:
BWR Refill-Reflood Program Contract No. NRC-04-79-184 Informai Monthly Progress Report for December,1981 Gentlemen:
a Please find attachte subject report:
Distribution o' this report is being made in accordance with the
" Monthly Distributir.n List" provided with W. D. Beckner's letter of September 6,1979.
- Regards, C
b J. C. Black, Senior Program Manager External Programs (408) 925-1988 Attachments
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A BWR REFILL REFLOOD PROGRAM TWENTY -- SEVENTH INFORMAL MONTHLY PROGRESS REPORT DECEMBER PREPARED FOR:
Division of Reactor Safety Research U.S. Nuclear Regulatory Comission Washington, D.C.
20555 NRC-FIN. - NO. B5877 -
AND:
Electric Power Research Institute 3412 Hillview Avenue P.O. Box 10412 Palo Alto, CA 94303 EPRI Project No. RP-1377-1 AND:
General Electric Company 175 Curtner Avenue San Jose, CA 95125 BY:
General Electric Co.
UNDER:
Contract No. NRC-04-79-184
SUMMARY
Data reduction and data evaluation from SSTF test data is continuing.
Model D2velopment and Qualification is proceeding per plan.
SIGNIDICANT DECISIONS / UPCOMING EVENTS A GE/NRC Meeting on ECCS (Technology Update' will be held in Washington, D.C. on January 20 and 21.
A PMG Meeting is being planned for February on the West Coast.
0 TASK 4.4 CCFL/ REFILL SYSTEM EFFECTS TESTS (30 SLCTOR)
Reduction of BWR/4 ECCS and BWR/6 System Response data contir.ued through December.
Data reduction was performed to a standarized format providing specific derived values and pictorial displays of: local subcooling, regional mass, and local mixture level. Additional data reduction (local subcooling hisory displays) was conducted to c'.aluate ECCS combination effects in BWR/6 System Response Tcsts.
BWR/4 ECCS system response and system sensitivity to parameter variations was evaluated.
ECCS combination effects on BWR/6 system response and BWR/4 ECCS Refill /
Reflood were also reviewed.
A memo summarizing the SSTF BWR/6 system response results was prepared and transmitted to the PMG. A report on parallel chennel effects is in the final (internal) review stage.
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TASK 4.7 MODEL DEVELOPMENT
. TASK 4.7.1 BASIC MODELS AND CORRELATIONS The implementation of the new heat transfer package is almost complete,.ar d testing is in progress. The review of better entrainment correlations for pool:
entrainment and during reflooding has been initiated.
TASK 4.7.3 TRAC BWR SUPPORT The implementation of the separator component into TRAC is progressing well, and testing so far has shown good results. Work is underway to improve the model for low flow and low quality situations.
The final phase of model checkout is underway for the two-phase level tracking model in the vessel.
In addition to previous test cases successfully executed the model is being checked for the PSTF, CCFL and BWR/6 simulations.
These three simulations will verify that the model will track. levels of the BUR.
Extension of the level tracking capability to the channel component is in progress. Verification and debug of the level tracking capability in the vessel diverted much' time from this work during the last month.
The conversion cf the level tracking model to Version 12 of BD1 has just begun.
At this time no problems with the conversion are foreseen.
TASK 4.8 MODEL QUALIFICAITON Two input TRAC models have been set up and debugged for the SSTF facility.
There is a 36-node vessel model with 3 core, channel regions, and a more detailed 66-node vessel model with 5 core, channel regions. These two models will be tested out against separate effects test SEl-4D in order to evaluate the model simulation fidelity (nodes) required to reproduce the multi-channel behavior observed during this test. The simplier 36-node model previously reported can predict the overall behavior observed; the more detailed model should be able to more closely reproduce the detailed response of the SSTF system.
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TASK'4.8 MODEL QUALIFICATION (CONT.)
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Future _ efforts will include completing this preliminary study, setting l
up a detailed BWR input model; and further debut and verification of.the other facility input models used previously. - On;e these facility input models are completely shaken down they will be used for the final qualification I-l of the next release version.
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