ML19322E638
| ML19322E638 | |
| Person / Time | |
|---|---|
| Issue date: | 03/19/1980 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19322E626 | List: |
| References | |
| REF-10CFR9.7 SECY-80-107, NUDOCS 8004020041 | |
| Download: ML19322E638 (11) | |
Text
.
O PROPOSED INTERIM HYDROGEN CONTROL REQUIREMENTS FOR SMALL CONTAINMENT (SECY 20-107)
MARCH 19, 1980
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soo40200 4l
TECHNICAL DISCUSSION RICHARD DENISE NRR RULEMAKING STATUS JIM NORBERG SD I
SBEE_C01CLUSIONS THE SMALL CONTAINMENTS, BWR MARK I AND MARK II DESIGNS, SHOULD BE INERTED.
AN IMMEDIATELY EFFECTIVE CHANGE IN 10 CFR 50.44 SHOULD BE MADE TO REQUIRE THIS, CONTINUED OPERATION AND LICENSING 0F OTilER NUCLEAR PLANTS CAN BE PERMITTED PENDING COMPLETION OF ADDITIONAL STUDIES AND RULEMAKING.
i I
PARAMETERS THAT GOVERN AN LWR
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l PLANT'S CAPABil lTY FOR
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HYDROGEN MANAGEMENT t.
5 L
DESIGN PARAMETERS
- 1. Containment Volume
- 2. Containment Design Pressure
- 3. Amount of Zircaloy Cladding ASSESSMENT PARAMETERS
- 1. Hydrogen Concentration Combustion Limits Detonation Limits
- 2. Containment Pressure Non-Condensible Gas Addition j
Energy Addition Heat Removal System Capability l
CONTAINMENT NET FREE VOLUME x 10-6 (py)3 l l
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DESIGN PRESSURE: 62 PSIG x
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8 CONTAINMENT DESIGN PRESSURE, PSIG i
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VOI.UME % HYDROGEN IN CONTAINMENT VS % METAL-WATER REACTION 100 90 u.,
80 h
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70 s
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O 10 20 30 40 50 60 70 80 90 100
% METAL-WATER REACTION
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i COMPARISON OF AMOUNTS l
OF NON-CONDENSIBLE GASSES i
(TYPICAL 1200 MWe PLANTS) d Pre-Accident Hydrogen Gas j
Containment Type Atmosphere (SCF) from 100% M-W l
Mark I (BWR) 300,000 700,000 Mark 11 (BWR) 300,000 700,000 Mark 111 (BWR) 1,500,000 700,000 I
Ice Condenser (PWR) 1,250,000 400,000
'. Subatmospheric (PWR) 1,250,000 400,000 l
Dry Containments 2,000,000 400,000 I
s l
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t COViPARISON OF EN ERGY SOURCES AND SIN KS (APPROXIMATE FOR THE TYPICAL 1200 MWe PLANT)
SOURCES:
ij LOCA Blowdown Energy:
400 Million Btu's l
, Exothermic M-W Reaction (100%):
250/140 Million Btu's j
Combustion of M-W Hydrogen:
200/110 Million Btu's i
Steam Generator Energy (PWR):
100 Million Btu's 3
Decay Heat Energy (1st Hour):
60 Million Stu's/ hour j!
SINKS:
'1 BWR Suppression Pool's ( AT=100 F):
600 Million Btu's
,l PWR Ice Condensers:
500 Million Btu's
~
PWR Fan C6olers:
100 Million Btu's/ hour 1
PWR Containment Spray System:
100 Million Btu's/ hour
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BWR Pool Cooling System:
200 Million Btu's/ hour
~
SUMMARY
OF CONTAINMENT CAPABILITY TO ACCOMODATE HYDROGEN GENERATION FROM ViETAL-WATER REACTION WITHOUT HYDROGEN WITH HYDROGEN CONTAINMENT COMBUSTION COMBUSTION TYPE DESIGN EST. FAILURE DESIGP' EST. FAILURE PRESSURE PRESSURE PRESSURE PRESSURE 3
8 U =i Mark I 889 100 %
5%
9%
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Mark ll 100 %
4%
6%
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8.
8.*S.h Mark lli
~100%
17 %
23 %
m 5 E.R ??
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Ice Condenser gy
~100%
15 %
25 %
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5 5' -
Subatmospheric R
100 %
53 %
~100%
o@ F[ 8
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Bf Dry 100 %
~ 65%
100 %
/
$R
SUMMARY
OF ANALYSES CONTAINMENT TYPES 4
g
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4 y
g 4
4 PARAMETERS DESIGN PRESSURE, PSIG 60 45 15 12-15 45 45-60 FAILURE PRESSURE, EST., PSIG 120 90 30 36-47 90 90-120 ESTIMATED PRESSURE 50% M-W; N0 BURN, PSIG 56 56 20-22 39 ESTIMATED PRESSURE I
100% M-W; NO BURN, PSIG 88 88 29-32 38 ESTIMATED PRESSURE f
30% M-W; W/ BURN, PSIG
>>200
>>200 55 42 10 3
ESTIMATED PRESSURE 50% M-W; W/ BURN, PSIG
>>200
>>200
>100
>100 41 27
% M-W TO REACH ESTIfMTED FAILURE PRESSURE W/NO BURN
>100
-100
-100
-100
>100
>100 J
% M-W TO REACH ESTIMATED FAILURE PRESSURE ll/ BURN 9
6 22 25 90 90->100 i
t
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POTENT!AL METHODS FOR IM PROVING lHYDROGEN MANAGEMENT CAPABILITY
~
i Inerting with Nitrogen Halon Suppression System Filtered-Vent System Hydrogen Combustion System 1
Other Methods Use of Chemical Catalysts e
Use of Gas Turbines
.