16 Battery Room Flammable Gas Conc
Transcript of 16 Battery Room Flammable Gas Conc
-
7/27/2019 16 Battery Room Flammable Gas Conc
1/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
CHAPTER 16. CALCULATING THE RATE OF HYDROGEN GIN BATTERY ROOMSVersion 1805.0The following calculations estimate the hydrogen gas generation in battery rooms.Parameters in YELLOW CELLS are Entered by the User.Parameters in GREEN CELLS are Automatically Selected from the DROP DOWN ME
All subsequent output values are calculated by the spreadsheet and based on values speciparameters. This spreadsheet is protected and secure to avoid errors due to a wrong entr The chapter in the NUREG should be read before an analysis is made.
INPUT PARAMETERSBATTERY INFORMATION
Float Current (F C)
Ampere Hours (A H)Number of Cells (N)
Constant (K)COMPARTMENT INFORMATION
Compartment Width (w c)
Compartment Length (l c)
Compartment Height (h c)
FLAMMABLE GAS INFORMATIONLower Flammability Limit of Hydrogen
Float Current Demand of Fully Charged Stationary Lead-Acid CellsReference: Yuasa, Inc., Safety Storage, Installation, Operation, and Maintenance Manual, S
Heritage Series, Flooded Lead-Acid Batteries, 2000.
FC*Charge Voltage Antimony(VPC) New Select Charg2.15 152.17 19 Scroll to des2.20 262.23 372.25 452.27 602.33 1202.37 1952.41 300User Specified Value Enter Value *(milliamperes per 100 AH @ 8-hr. rat
FC*Charge Voltage Antimony(VPC) Old Select Charg2.15 602.17 80 Scroll to des
2.23
-
7/27/2019 16 Battery Room Flammable Gas Conc
2/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
2.20 1052.23 1502.25 1852.27 2302.33 4502.37 7002.41 1100User Specified Value Enter Value *(milliamperes per 100 AH @ 8-hr. rat
FC*Charge Voltage Antimony(VPC) Calcium Select Charg2.152.17 4 Scroll to des2.20 62.23 82.25 112.27 122.33 242.37 382.41 58User Specified Value Enter Value *(milliamperes per 100 AH @ 8-hr. rat
METHOD OF YUSHA, INC.Reference: Yuasa, Inc., Safety Storage, Installation, Operation, and Maintenance Manual, S
Heritage Series, Flooded Lead-Acid Batteries, 2000.
Estimating Hydrogen Gas Generation RateH2(gen) = F C/1000 x A H/100 x K x N This equation
For every 15
Where H2(gen) = hydrogen gas generation rate (ft3
/min)FC = float current (mA per 100 A H @ 8-hr. rate)
AH = ampere hours (normal 8 hour)
K = constant - 1 A H = 0.000267 ft3
N = number of cellsH2(gen) = F C/1000 x A H / 100 x K x N x 2 Since electrol
H2(gen) = 0.044 ft3 /min 0.001252
Estimating Hydrogen Gas in Compartment Based on Given FlammabiH2(comp) = V x FL
Where H2(comp) = hydrogen gas in compartment (ft3)
V = volume of compartment (ft 3)FL = hydrogen gas flammability limit
Volume of CompartmentV = w c x lc x h cWhere V = compartment volume (ft 3)
wc = compartment Width (ft)
lc = compartment Length (ft)
h c = compartment Height (ft)
-
7/27/2019 16 Battery Room Flammable Gas Conc
3/21
-
7/27/2019 16 Battery Room Flammable Gas Conc
4/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
Revision Log Description of Revision1805.0 Original issue with final text.
-
7/27/2019 16 Battery Room Flammable Gas Conc
5/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
S GENERATION
U for the Charge Voltage Selected.fied in the input
in a cell(s).
37 mA per 100 A H @ 8-hr. rate
3730.00 Ampere hours60.00
0.000267 ft3
26.00 ft
50.00 ft
12.00 ft
4.00 Percent 0.040
Calculate
ction 58.00,
Current Value
ired value then Click on selection
e)
Current Value
ired value then Click on selection
-
7/27/2019 16 Battery Room Flammable Gas Conc
6/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
e)
Current Value
ired value then Click on selection
e)
ction 58.00,
is based on when electrolyte temperature is 77 F (25 C)F (8 C) electrolyte temperaturte rise the equation will multiply by 2
te temperature is 92 F (33 C) the equation is multiply by 2
m 3 /min
lity Limit
Answer
-
7/27/2019 16 Battery Room Flammable Gas Conc
7/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
Flammability Limit
(min)
hours
Safety Storage,eries, Flooded
s. The results of r a given situation,
ults of hand calculation,
(s) in the spreadsheet,
Answer
-
7/27/2019 16 Battery Room Flammable Gas Conc
8/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
DateJanuary 2005
-
7/27/2019 16 Battery Room Flammable Gas Conc
9/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
CHAPTER 16. CALCULATING THE RATE OF HYDROGEN GAIN BATTERY ROOMSVersion 1805.0The following calculations estimate the combustible gas concentration buildup time in encloseParameters in YELLOW CELLS are Entered by the User.Parameters in GREEN CELLS are Automatically Selected from the DROP DOWN MENU
All subsequent output values are calculated by the spreadsheet and based on values specifieparameters. This spreadsheet is protected and secure to avoid errors due to a wrong entry inThe chapter in the NUREG should be read before an analysis is made.
INPUT PARAMETERSCOMPARTMENT INFORMATION HYDROGEN LEAK INFORMATION
Compartment Width (w c)
Compartment Length (l c)Compartment Height (h c)
Leakage Rate
Percent of Combustible Gas/Air Mixture
Combustible Gas Concentration (C)Mixing Efficiency Factor (K)
Mixing Efficiency (K Values) for Various Ventilation ArrangementsReference: NFPA 69, "Standard on Explosion Prevention Systems," 1997 Edition.
K Select Ventilation ArrangemSingle Exhaust Opening 0.2Multiple Exhaust Openings 0.3 Scroll to desired arrangement then C
K Select Ventilation ArrangemSingle Exhaust Opening 0.2Multiple Exhaust Openings 0.4 Scroll to desired arrangement then C
K Select Ventilation ArrangemSingle Exhaust Opening 0.3Multiple Exhaust Openings 0.5 Scroll to desired arrangement then C
K Select Ventilation ArrangemSingle Exhaust Opening 0.5Multiple Exhaust Openings 0.7 Scroll to desired arrangement then C
K Select Ventilation ArrangemSingle Exhaust Opening 0.8Multiple Exhaust Openings 0.9 Scroll to desired arrangement then C
K Select Ventilation Arrangem
Single Exhaust Opening Enter ValueMultiple Exhaust Openings Enter Value
Scroll to desired arrangement then C
0.3
9
-
7/27/2019 16 Battery Room Flammable Gas Conc
10/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
METHOD OF NFPA 69, STANDARD ON EXPLOSION PREVENTION SYSTReference: NFPA 69, "Standard on Explosion Prevention Systems, 1997 Edition, Appendix D.
Estimating Number of Theoretical Air Changesln [1 - (CQ / G)] = - K NWhere C = combustible gas concentration
Q = volume of air in enclosure (ft 3/min)G = combustible gas leakage rate (ft 3/min)K = mixing efficiency factor (constant)N = number of theoretical air changes
Q = volume of air in enclosureQ = 85.00 ft3/min
G = combustible gas leakage rateG = 15 (ft3/min)
N = number of theoretical air changesln [1 - (CQ / G)] = - K Nor N = - [ln(1 - (CQ/G))]/ K
N = 0.40
Estimating Combustible Gas Concentration Buildup Timet = (V / leakage rate) * NWhere t = buildup time (min)
V = compartment volume (ft 3)leakage rate (ft 3/min)N = number of theoretical air changes
Volume of CompartmentV = w c x lc x h cWhere V = compartment volume (ft 3)
wc = compartment Width (ft)
lc = compartment Length (ft)
hc = compartment Height (ft)
V = 5220.00 ft3
Combustible Gas Concentration Buildup Timet = (V / leakage rate) * N
t = 20.93 minute
The above calculations are based on method presented in the NFPA 69, "StanExplosion Prevention Systems, 1997 Edition.Calculations are based on certain assumptions and have inherent limitations.such calculations may or may not have reasonable predictive capabilities for aand should only be interpreted by an informed user.
Although each calculation in the spreadsheet has been verified with the resultthere is no absolute guarantee of the accuracy of these calculations.
Answer
NOTE
10
-
7/27/2019 16 Battery Room Flammable Gas Conc
11/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
Any questions, comments, concerns, and suggestions, or to report an error(s)please send an email to [email protected] or [email protected].
Prepared by: Date Organization
Checked by: Date Organization
Additional Information
Revision Log Description of Revision1805.0 Original issue with final text.
11
-
7/27/2019 16 Battery Room Flammable Gas Conc
12/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
GENERATION
d compartments.
for the Infiltration Selected.d in the inputa cell(s).
29.00 ft
15.00 ft12.00 ft
100.00 ft3/min
15.00 percent 0.15
2.00 percent 0.020.3
Calculate
ent
lick on selection
ent
lick on selection
ent
lick on selection
ent
lick on selection
ent
lick on selection
ent
lick on selection
12
-
7/27/2019 16 Battery Room Flammable Gas Conc
13/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
MS
dard on
The results of given situation,
of hand calculation,
13
-
7/27/2019 16 Battery Room Flammable Gas Conc
14/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
in the spreadsheet,
DateJanuary 2005
14
-
7/27/2019 16 Battery Room Flammable Gas Conc
15/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
CHAPTER 16. CALCULATING THE RATE OF HYDROGEIN BATTERY ROOMSVersion 1805.0 The following calculations estimate the flammable concentration of gases and vaporsParameters in YELLOW CELLS are Entered by the User.
Parameters in GREEN CELLS are Automatically Selected from the DROP DOWN All subsequent output values are calculated by the spreadsheet and based on valuesparameters. This spreadsheet is protected and secure to avoid errors due to a wrongThe chapter in the NUREG should be read before an analysis is made.
INPUT PARAMETERSLower Flammability Limit of Flammable Gas or Vapor (LFL)Compartment Width (w c)
Compartment Length (l c)
Compartment Height (h c)
LOWER FLAMMABILITY DATA FOR GASES AND VAPORSGases and LFL Select Gas or Vapor
Vapors Volume-PercentScroll to desired gas
Hydrogen 4.00Carbon Monoxide 12.50Methane 5.00Ethane 3.00Propane 2.10
n-Butane 1.80n-Pentane 1.40n-Hexane 1.20n-Heptane 1.05n-Octane 0.95n-Nonane 0.85n-Decane 0.75Ethene 2.70Propane 2.40Butene-1 1.70
Acetylene 2.50Methanol 6.70Ethanol 3.30n-Propanol 2.20
Acetone 2.60Methyl Ethyl Ketone 1.90Diethyl Ketone 1.60Benzene 1.30User Specified Value Enter ValueReference: SFPE Handbook of Fire Protection Engineering , 3 r Edition, 2002, Page 2-
ESTIMATING FLAMMABLE CONCENTRATION OF GASES USING
H dro en
-
7/27/2019 16 Battery Room Flammable Gas Conc
16/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
Volume of Gas or Vapor for Deflagration = V x LFLWhere V = volume of enclosure (ft 3)
LFL = lower flammability of a gas or vapor (pe
Volume of CompartmentV = w c x lc x h cWhere V = compartment volume (ft 3)
wc = compartment width (ft)
lc = compartment length (ft)
h c = compartment height (ft)
V = 1000.00 ft3
Volume of Gas or Vapor for Deflagration = V x LFL
Volume of Gas or Vapor for Deflagration = 40
The above calculations are based on principles developed in the SFPProtection Engineering, 3 rd Edition, 2002.Calculations are based on certain assumptions and have inherent limiof such calculations may or may not have reasonable predictive capasituation, and should only be interpreted by an informed user.
Although each calculation in the spreadsheet has been verified with ththere is no absolute guarantee of the accuracy of these calculations.
Any questions, comments, concerns, and suggestions, or to report anplease send an email to [email protected] or [email protected].
Prepared by: Date
Checked by: Date
Additional Information
NOTE
-
7/27/2019 16 Battery Room Flammable Gas Conc
17/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
Revision Log Description of Revision1805.0 Original issue with final text.
-
7/27/2019 16 Battery Room Flammable Gas Conc
18/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
GAS GENERATION
in enclosures.
MENU for the Gas or Vapor Selected.specified in the inputentry in a cell(s).
4.00 Percent 0.04010.00 ft
10.00 ft
10.00 ft
Calculate
or vapor then Click on selection
175.
IMITS OF FLAMMABILITY
-
7/27/2019 16 Battery Room Flammable Gas Conc
19/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
cent-volume)
ft3 1.13 m3
Handbook of Fire
ations. The resultsilities for a given
e results of hand calculation,
error(s) in the spreadsheet,
Organization
Organization
Answer
-
7/27/2019 16 Battery Room Flammable Gas Conc
20/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section
DateJanuary 2005
-
7/27/2019 16 Battery Room Flammable Gas Conc
21/21
Office of Nuclear Reactor RegulationDivision of Systems Safety and AnalysisPlant Systems BranchFire Protection Engineering and Special Projects Section