ML091940534
| ML091940534 | |
| Person / Time | |
|---|---|
| Issue date: | 08/28/1984 |
| From: | Han J Office of Nuclear Regulatory Research |
| To: | |
| Han, James T. | |
| References | |
| Download: ML091940534 (5) | |
Text
IN VESSEL HYDROGEN PRODUCTION
- A U)MPARISON OF NRC CoNTRACTOR AND IDCOR EsTI"'1ATIONS JN1ES T, HA.NJ NRC-RES fJRC/IDCOR MEETING ON INTEGRATED ANALYSIS OF FISSION PRODUCT BEHAVIOR RocKVI LLEJ MA.RYLAND AUGUST 28 - 29J 1984 t.J
TP.E PRESENTATI~ IS PASED ON TilE FOLLa~ING REFERENCES.
o Jif{C COITTPACTOR C/\\LCULATIONS USING TI!E ~ARCH mDE:
- 1.
GIESEKE) J, A.J ET AL.J "RADIONUCLIDE RELEASE llNDER SPECIFIC LWR AccmENT C.ONDITIONs/' P.MI - 2104) VoLs, I - VI (!:RAFT PUBLISHED IN JULY 1984),
- 2.
HANOOUTS FROM THE FIRST NRC/IDCOR MEETING (IN HARPER'S FERRY)
WEST VIRGINIA) NOVEMBER 29 - DECEMBER lJ 1983) AND FROM THE THIRD NRC/IDCOR MEETING (IN ROCKVILLE) fv1/4RYLANDJ MAY 15 - 17) 19M),
o IDCOR CALCULATIONS USING THE MAAP CODE*:
- 1.
IDCOR TECHNICAL REPORTS 23.1 FoR ZION) SEQLX)YAHJ PEACH &nToMJ
/1tID GRAND GULF (DRAFT PUBLISHED IN JULY 1984),
2, SAME As No, 2 fIBOVE, 3,
IDCOR TECHNICAL REPORT 12, L "HYDROGEN GENERATION IlJR I NG SEVERE WRE DN"\\l\\GE SEQUENCES J" (JULY 1983).
- 4.
IDCOR TECHNICAL REPORT 15.lAJ "IN-VESSEL WRE MELT PROGRESSION PHENOMENA) " (JULY 1983).
- IDCOR TECHNICAL REPORTS 23.1 SuPERSEDE OTHER IDCOR RESULTS SHOULD ANY DIFFERENCES
- ExIST,
I QUANTITATIVE C~1PARISO'J OF IN-VESSEL HYDROCfN PffiillCTIO'JS CALCULATED FOR VARIOUS ACCIIBJT SEQUENCES
- NlflBERS GIVEN APE THE IN-VESSEL HYDROSEN PRODUCTIQ\\lSEQUIVALENT TO THE FRACTICl'l OF ALL ZIRCALOY IN THE COPE OXIDIZE]. 1 4t HYDRCX3EN PRODUCTIOfJ FOR ALL ZIRCALOY IN THE COPE OXIDIZED:
ZIOO - 1950 LBs SEQUOYAH - 2230 lBs GRAf ID GULF -
76fJJ IBs PEACH BOTTCT1 - 63?D lBs
- PwR - JMLI3' PLANT ZION SEQUOYN-1 r
BCL 0.51 (0.28 BEFORE CoRE SLUMP)
IDCOR 0.15 0.49 (0,25 BEFORE CoRE SLLJv1P) 0.34 RATIO 3.4 O PvJR., lcE CoNDENSER CoNTAif'lvtENT - ~HF PLANT BCL IOCOR RATIO SEQUOYAH 0.66 (0,57 BEFORE CoRE SLL."1P) 0.. 39 - 0.40 "8'b:::,00
~-:,}1-,_j 1.7 1.4
PLANT BCL IDC0R ZI O\\J CB SEQUOYAH 0.85 (0,73 BEFORE CoRE SLU'1P)
FoR ZICJ!
0.30 FoR SEQUOYAH
- BWP/6, Ml\\RK I I I CoNTA 1 N'1ENT - TQLN PLA,___,__,_NT __
~G-'-=-RAND~G=Ulf~-----
BCL 0.40 (0.18 &FORE CoRE SL!J'1P)
IDCOR 0,056 <0.0013 FoR A CAsE Wrn, !£PRESSURIZATION)
RATIO 7.1
- BWR/4, M/\\RK I CoNTAI Nf'1ENT -
TW PLANT BCL IDC0R RATIO PEAGI BOTTCJ1 0, 61 (0, 60 BEFORE CoRE Sur-1P) 0,(68 9.0
- TIHR/4, W\\RI( I CoNTAINMENT - TC PLANT BCL IDCOR RATIO PEACH BOTTC1'1 0,47 (0,26 BEFORE CoRE SLUMP) 0.047 10,
I
- IDCOR -RESULTS ARE OBTAINED BY ASSUVlING Cl) PS A CUT-OFF ID1PERATURE OF 2300 K IS REACHED) BLOCKAGE FO~ IN THE CHAN~lEL AND SHUTS OFF STEAM SUPPLY AND STOPS HYDROGEf'l PRODUCTIOf'L (2)
PS CORIUM ENTERS THE LOHER Pl£NUM OF THE VESSEL HYDROGB'l PRODUCTION DUE TO CORIUM - WATER INTERACTION IN THE VES~EL LOwER PLEf'~UM IS NEGLIGIBLE) AND (3) STEM1 GENERATED BY CORIUM ENTERING THE LOWER PLB*~UM HPS NO EFFECT Of-l TI-IE HYDROGEN PRODUCTICT'J IN THE CORE. THEREFORE) LOWER HYDRCXJEN PRODUCTIDrlS ARE CALCULATED.
- ON THE CONTRARY) BCL RESULTS ARE OBTAINED BY *ASSLMING Cl) NO BLOCKAGE F0~1S AND fv'ELTING r-~ODES PB'1£\\IN IN THE CORE FOR OXIDATirn UNTIL CORE SLUMPS, (2) PS CORE SLUMPS) MORE STEAM IS GENERATED TO FURTHER OXIDIZE THE ~INING FUEL RODS IN THE CORE) AND (3) sal;E HYDROGEr~ CAN BE PRODUCED DUE TO CORIUM - WATER INlIRACTl(Jl HJ THE VESSEL LOWER PLDJlt1 I
- IT SHOUL] BE NOTED THAT THE TMl-2 ACCIDENT PRODUCED AN AVOUNT OF HYDROGEN EQUIVALENT TO ABOUT 50% OF ALL ZIRCALOY IN THE CORE OXIDIZED.
REPEATED PROCESSES OF CORE UNCOVERY - WATER BOILOFF - CORE REFLOOD ARE RELIEVED TO PLAY AN IMPORTANT ROLE m HYDROGEf'~ PRODUCTIG'L