ML19329G172
| ML19329G172 | |
| Person / Time | |
|---|---|
| Issue date: | 06/26/1980 |
| From: | NRC COMMISSION (OCM) |
| To: | |
| Shared Package | |
| ML19329G168 | List: |
| References | |
| REF-10CFR9.7 NUDOCS 8007140070 | |
| Download: ML19329G172 (17) | |
Text
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O PRDFDSED INERIM If(DREI CDEffROL REDJIlBERS RR SMN1 NAITEfT (SED' E-10D JLPE26,1980 l 8007140070'
TABE T QNENTS Om a%Y ISSUES Oh M1 AGE!EIT POLICD e
e ECISIm BSETTS e
LIE 1.IH00D OF ECMED COE ACCIIEES i
lh Cm0MIMTIWS IN CONTAI.4EE e
e STIETIM. ESPmSE lh MITIGATIm fEGES e
~
e ESEARCH e
ELATED TOPICS s
CONCLUSIm 4
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ORN0 LOGY FEBRM/ 22,1980 STAFF ISSLED SECY 80-107, WITH INTERIM HYDRDEli CGiTFDL RE5UIREitIES FOR SWL CalTAltlETS MEH19,1980 CatISSION BRIEFING G4 SECY 80-107 MEH28,1980 CutISSIOl REEUESIED ADDITIONAL IWOR%TIG1 REGARDIfE SECY 80-107 APRIL 22,1980 STAFF ISSUED SECY 80-107A - A PARTIAL RESP 0tE TO llE CGHISSIG4'S RE51EST T MARCH 28,' 1980 JOE 20,1980 STAFF ISSUES SECY 80-107B, WHICH CGRETES THE RESPOE TO TIE CONISSION'S RE5EEST OF f%RCH 28, 1980
.H E 26, 1980 TODAY'S BRIEFING l
]
ISSES ASSOCIATED WITil MiAGEEIT. R1.IQ' WTIL R1 FAKING PPOEEDINGS AE COHEIE:
1.
SM.L Al.LIFEPATING M I C0tifAltEITS E IBtkits Wttus V.Y.' #iD 1%T01-2) 2.
SM.L A!.L IEi M I #lD M II WAllEfiS E IttRidJ?
(Atttus 14 LNITS)
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3.
SM.L ATITIOW. Q MITIGATIm EASlJES E EQJIED FOR IE CGEiSER CONTAllE4TS?
(AFECIS 10 LNITS)
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4.
SM.L ADDITIOR MITIGATIm iEASlJES E EWIED FOR
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N III CMTAltmfis?
Wttus MANY WITS)
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5.
SM.L AIDITIGR h MITIGATIm EASLES E R31]IED FOR a
SEATESPERIC #0 DRY CONTAlfMITS?
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e ECISIM E1 RENTS RE IWWEMET EASUES 1.
LIELIH000 7 ACCIIETIS TPAT EEPATE LA%EA'1HEWQ
~
2.
h CmCEIGATION W5 SUS ZR-WATER EACTIm AND CONTAINEW MllfE 3.
STRJCTlBL ESPGE TO.gCmEUSTIm
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14.
tHtcIIVEESS T VARICUS MITIGATIm IEASl5ES l
M%CT T CLI-80-16 m HYIEGEN IWMGEiefT FU_ ICY 0.I-90-16 STATES:
QESTIm 1 -
10 CFR 50.41 SEULD NOT E WAIVED HJT SEULD IE%IN IN PUE UNTIL EE m MATE AND CmSIEED RJLB% KING CM E CD1ETED QESTIm 2 -
APART FiU110 GR 50.Wi, TE C H USTIB.E GAS CQ E L ISSUE
~
CM E LITIGATED IEER 10 GR 100 NRR APPPDA01 TO HYDEEN (WMGEislT IN LIGHT T CutISSIm GUIINE:
l
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3D GR 50.41 IN tHtCT AS BASIS FOR POST-ACCIDENT o
CMUSTIBLE GAS CQEL o
HYDRIEN CDEDL EASUES BEXND.THDE EQJIED BY 10 GR 50.46 WILL E REDJIED IF IT IS ETEti1ED THAT TEE IS A CEDIBLE LOCA SCENARIO
!r ENTAILING HYDEGEN GEEPKilm, CMUSTIGI, BEACH T GMAllf9IT IEEERITY AND OFFSITE DOSES EEEEDING 10 GR 100 GUIELIIE VALES l
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I I
EMS 1.EADING TO EGPAED CDE AND PENIE f9SWES TAKEN SING TMI-2 FAIH E W FNE PRINCIPAL PPfMNTIE FOSUES I
LARGE I.DCA TESTING W RELIE AND SAFEIY VALVES EMERGENCYPOWERFORPRESSURIZER i
EQJIPMENT
. DIRECT INDICATION OF VALVE POSITION l
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- l. DSS OF ALL ACTIVE IMPROVED OPERATING PROCEDURES AND OPERATOR TRAINING m ggg (pp)
SURC00LINGMETER SMALL l.0CA PORY SETPOINT MCOS;EiHS IMPROVP.ENTS 1
ll~
l.0SSOFHI MtESSURE IN ROVED OPERATING PROCEDURES 4 0 i
INJECTION J) OR OPERATOR TRAINING RCULATI FAILURE gyg g
- M39 UNAiGIGUQUS INDICATION OF REACTOR VESSEL LEVEL
. TRANSIENTS I.0SSOFALLAUXILIARY VALVES FAIL TO THE OPEN POSITICN
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AUTCNATIC APd INITIATION gg
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INDICATE AFd IN CONTROL ROCM
... _ OPERATCR_TBA MIfG _ _ - _.
~T l.0SS & HI 5SSURE INROVEDOPERATINGFROCEDURESAND IMJECTIOl
)
OPERATOR TRAINING
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SusC00LINGMERR lhAMBIGUCUS INDICATICM OF REACTOR
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U IN AIBITION - 19NY GEMRAL ITEMS: SHIFT ECHNICAL ADVISOR, SHIFT TURNOVER PROCEDURES, TMI-2 TRAINING, REIRAINING, ETC.
YOLUS$E % HYDROGEN IN CONTA2884EMT VS % ll#ETAL-WATER REACTKWii
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ps# q*t 4 **5 0e+y*
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sG gS,pN g00.#
DETCMiE pc O"
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10 9
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d 9 3.500 #
BURN pgg. OBT
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4-t I
f f
f f
t t
t 3
0 10 20 30 40 50 60 70 80 90 100
% METAL WATER REACTION
OMTAINeli(LTImlE STENGE AND ESI61 SAEIY MARGINS l
GNIAlifES ESIGED TO OJRRENT NRC CRITERIA CUE SECTIm III DIV.1 AND 2 COES) GEEFALLY HAVE 2.5 TO 2.8 SAEIY FACTORS ElfE STRUCTURAL YIELD #0 SLIGHILY HIGER SAEIY FACTORS BINST [fMROLED STRUCIURALIEFOR% tim OR FAIUJE.
FOR EX#PLE:
1 l
CALOJI.ATED ESTIPATED*
SAFETY FILTOR SAEIY FACTOR AGAINST YIELD AGAINST FAILUE ZIm Imittst.U CONCEIE CmTAIREE 2.7 3.0 INDIAN POIffT EIBF.
CWC, GETAlffENT 2.7 3.0 SEQJ0YAH IE GMENSER STEEL I
CmTAINEIT 2.7 3.2 PCGljIE STEL l
l CMTAlffEiT 2.8 3.4
- CmSERVATIWLY ESTIf%TED VARES; SiiCUD E WRIFIED BY EXPERIPE{TAL RESEARW.
l
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2.
CONTAIfM ESPGE TO IfE1AL PESSUE LOAD C0EAlffEfffS AE GEEPALLY ESIGED TO ESP 00 TO IfDEASIfE IfffERNAL PESSUE LOADS IN A DUCTIE MMER WITH HDE fEERNE silts 5 CORlLING llE ESIGN. DISONfIftlITY Zu1ES SJ01 AS WALL TO MT, WALL TO IDE JtIETIGE, EEIREiT HAT 01, EE-TRATIGS NOR91LY HAVE HIG1 LOCAL sntS5/STPAIN LEADING TO POTENTIAL LEAFAGE.
_ _.. [__
3.
OEDING COEAIftBir ESEAROVIEOflICAL ASSIST #E PROGP#E
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FY-80 FY-81 (A) EVIEW 0F (IPP STRJC. ESIGi BY #ES LAB 50K 104K
@ STRUCTUPAL RESPG4SE E
~
LWR SYSTEE BY LASL 150K 1EK 4.
GKERTAINTIES AND COME (A) EAKAE OF CONTAlfM EDO ESIG1 PESSUE,
~1 ESPECIALLY AT OR EM0 YIELD OF STEEL, CAffl0T E
E ACCUPATELY ONUIED OR PEDICTED.
T T~
@ TEE IS VIRRIALLY NO IBF0WATIQ1 CR EXPERIENTAL
~
DATA TO RELATE TE sntsS/STPAIN LEMIS E LINER l
3
- 0 ED MTERIN.S TO INITIATIm 0F UfB CPK!G, 0%CK Pf0PKATIm PATTEFN AND SIZE.
IT IS EIEWD THAT TEE SHOUG E 00 CFACK AS LONG AS UtB #0 ED MTERIN. slits &.S ARE EFT EDW YIELD. HOEMB, THIS POINT REQJIES ESEMG IfM1.VIfE TES13 FOR FIfML 01FIRMATIm.
(O FED FUNDING IN EXT 2-5 YEARS TO RESOLVE THIS ISSLE.
l
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j POTENTIAL ETH05 RE IPPIU/ING HYM0 GEN MMEMENT C/PABILITY INERTING WITH NITROGEN IkN Sti+:e.SSIM SYSTEM FILTERED-VENTSYSTEM HYiMKmEN C mBUSTIm SYSTEM l
OTHER h Usa w CHEMICAL CATALYSTS Usa w GAS IURBINES
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ESEAR0i USERS EaEST RAS EBI PEPAED AND IS BEING EVIEED OEJECTIW: TO PPD /IE TE0flIGL SUPPORT FOR CG00CTIfE RLEMAKliE G1 EGAED/tRTED CDE ACCIIEUS 1.
INVESTIGATE FES ESIEl PRCf0SALS 2.'
OAlla0L SYSIBE TESE ITES WII.L E EVALUATED FJR ALL CURAlifEIT TYFE INITIAL FOCUS U1 IE CCIEISERS.
DP#l 01 ItF0FFATIGl ifATED FPU1 El.ATED SIl0IES (711P) 3-PPASESOFPROGRAf1 1.
ESTABLISH ELEASES TO CGITAlfEIT FOR EGPAED/?ETED CORE ACCIIEITS -
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2.
ETERIIE CalTAItEIT RESPGiSE Gli.X AT LOOLI 3.
E/ALUATE MITIGATIG1 IE/IES O
e S
e i.
RF1 ATED TCPIG e
IN H IM RtLE 1.
IEIJIES IERTING & MAFK I #0 MARK II 2.
IEXJIES ANALYSES OF OlERS 3.
CDDIFIES LESSmS 15ARED ITE5 4.
SH0lLD BE EADY RR CTMISSIm CmSIEPATION BY Jl]LY 1980 e
RNAL RE 1.
PF0EEDING WII.L CMSIER BIGD PANE OF ISSES El.ATED TO EGPADED/EllED CDE ACCIENTS IN SAETY EVIBE 2.'
AD/ANCE NOTIE IS f01 UNER EVIEW BY NRR 3.
CQHITIm = = 1982 mI mm EGRAED CDE C0 CLING, INCLUDING THE HYDIEEN f
ITNAEENT ISSE IS A C#01DATE FOR ADDITIm j
l TO TE NRR PROGRAM RR l] sis.
l e
Z/IP STl] DIES i
1.
SICTIW:
DP!GE SAETY AT ZIm ANDINDI#1POINTPLANTS
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GENERAL ELECTRIC'S OBSERVATIONS MARK I AND II DO NOT REQUIRE INERTING....
1 o
BWR DESIGN FEATURES PREVENT HYDROGEN GENERATION REACTOR VESSEL WATER LEVEL MEASUREMENT RAPID DEPRESSURIZATION CAPABILITY STRONG NATURAL CIRCULATION
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LARGE PASSIVE HEAT SINK IN CONTAINMENT o
INERTING YIELDS SMALL RISK REDUCTION
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o HAZARD TO PLANT PERSONNEL INCREASED
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o CONTAINMENT ENTRY DISCOURAGED AND INSPECTION REDUCED l
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w GENERAL ELECTRIC'S CONCLUSIONS f
PROPOSAL SHOULD NOT BE APPROVED....
o PRESCRIPTIVE o
NOT URGENT SAFETY ISSUE l
o INADEQUATE BASIS ADDRESS IN RULE MAKING PROCESS o
SOLICIT BALANCED AND QUANTITATIVE INPUT o
TIMING CONSISTENT WITH LOW RISK o
IDENTIFY GREATEST RISK REDUCTION STEPS o
ELATED TOPICS (CBE:)
e Z/IP STUDIES (CGE:)
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2.
PARTICIPANTS: St LASL! BCL (KILITIESl STAFF 3.
SOEULE:
CRITERIA FOR SNTIY IEVIES 6/30/80 CGPLETE PROGP#1 9/80 l
4 l
l l
l
^
l APPLICATI010F ECISITt BBES TO VARIOUS CONTAIffSIT ESISIS
/
+
/
o e
~+
Y 4
LIKELIHCG LN LN LOW LCW LN HYDROGEN CGCENTRATIONS HIGH MODERATE MODERATE MODERATE LCW STRUCRRAL RESPONSE PROBLEM Pit 0BLEM PROBLEM NO NO PROBLEM PROBLEM MITIGATION MASURES EXIST UNCERTAIN (M ERTAIN
, UNCERTAIN WCERTAIN
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CONCLUSINS RE211RE STUDIES NOTHING NOTHING NOWING MORE MORE 10RE INERTmG NOW NN NN
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