ML040120055
| ML040120055 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 12/22/2003 |
| From: | - No Known Affiliation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2003-0358 | |
| Download: ML040120055 (15) | |
Text
SDP - HARRIS FIRE ZONE 1-A-4-EPA (AKA SAFE SHUTDOWN ANALYSIS AREA 1-A-EPA)
- Ignition sources: Transients 1 ventilation fan 5 electrical cabinets Electrical junction boxes Miscellaneous hydrogen fires Welding/Ordinary Combustibles and Welding/Cables
- Combustibles: 2 gal. transient flammable liquids, with no transient combustible permit required (per FPP-004) 5 gal. transient combustible liquids, with no transient combustible permit required (per FPP-004) 2,940 lbs. of cable insulation, per UFSAR (IEEE-383)
Rubber mats up to 150 sq. ft. may be installed without continuous attendance - per FPP-004.
Transient combustibles up to one million Btu above the analyzed combustible loading for a given fire zone are considered a low fire load and no fire watch or other compensatory action is required -
per FPP-004.
Dimensions: The 1-A-EPA fire area is approximately 3,658 sq. ft.; with a length of 63 ft., width of 58 ft., and ceiling height of 23 ft. Assume natural ventilation with a vent opening of 3 ft. wide by 7 ft. high (a doorway). The cables of concern exited an MCC at about 10 ft. above the floor.
Assume the fire starts in front of that MCC.
Analysis: 5 gallons of transient oil spill on 150 sq. ft. of rubber mat. Also present is 125 lbs of solid transient combustibles (poly bags, rags, rubber, wood). All get ignited by a portable electrical implement (e.g., grinder, drill, heater, light bulb). Assume the rubber mat has a HRR of 354 Kw/sq. meter, an area of 17 sq. meters, and a total HRR of 6,000 Kw. Assume the 125 lbs of solid transient combustibles have a HRR of 500 Kw/ sq. meter, an exposed area of 2 sq.
meters, and a total HRR of 1000 Kw. The heat release rates from the rubber mat and the solid transient combustibles are added to the heat release rate from the oil in analyzing the Hot Gas Layer and Plume C/L Temperatures.
Pool Pool Pool Flame Pool Hot Gas Hot Gas Hot Gas Hot Gas Plume Fire Fire Fire Imping Fire Layer Layer Layer Layer C/L Area Heat Flame ement Burning Temp. Temp. Temp. Temp. Temp (sq. Release Height to Duratio After 1 After 2 After 3 After 4 (deg.
ft.) Rate (ft.) Cable n (min.) Minute Minutes Minutes Minutes F)
(kW) Tray (deg. F) (deg. F) (deg. F) (deg. F) _
20 3333 14.6 yes 8 721 800 851 889 503 40 6667 18.8 yes 4 853 948 1009 1055 636 60 10000 21.8 , yes 2.65 975 1084 1155 NA 776
==
Conclusion:==
A hot gas layer in excess of the 700 degrees F needed to burn all IEEE 383 cables near the ceiling could occur.
I I - pt-4 Worksheet NRR/DSS0SPLB 1. Rev. 3.0 r March 2002Workshop fC METHOD OF PREDICTING HOT GAS LAYER TEMPERATURE AND SMOKE LAYER HEIGHT IN ROOM FIRE WITH NATURAL VENTILATION COMPARTMENT WITH THERMALLY THICK BOUNDARIES 8 > 1 inch VERSION 1.03 WPararneters should be'spcifed ONLY. IN THE YELLOW INPUT:PARAMETER BOXES. 2--j ;iX-
- 3 I M I0-04 1 =. - 11 .- .. 0I. -Ili- .00.*0I-[S0I-. - 0..
INPUT PARAMETERS COMPARTMENT INFORMATION Compartment Width (wc) 'n 58.00 ft Compartment Length (I) 63.00 f Compartment Height (hc) It 3.00 Vent Width (wv) <!3.00 ft Vent Height (hN) 2134 Top of Vent from Floor (VT) 7 ftI.00 n Interior Lining Thickness (8) -E2.00In For thermally thick case the Interior lining thickness should be greated then 1 Inch.
AMBIENT CONDITIONS Ambient Air Temperature (To)
Specific Heat of Air (cp) l 1.00 lkJ/kg-K Ambient air Density (Do) l 1.20 1kCI/m 3 THERMAL PROPERTIES OF COMPARTMENT ENCLOSING SURFACES FOR Interior Lining Thermal Inertia (kpc) ,-2Ii, ;12.9 (kwm/tK) 2.sec Interior Lining Thermal Conductivity (k) L3n0.0016 kW/r-K Interior Lining Specific Heat (co) LZ1>': 0.75 kJ/kg-K Interior Lining Density @) j:J.2400 kg/rm3 INTERIOR LINING EXPERIMENTAL THERMAL PROPERTIES FOR COMMON MATERIALS 6 B 00016 0 VA,~0 Ca c:Sil~te~oagJ 0.09 0.0013 005
- U Aialc ijetumro 0 310:0080 G Aslib1nuato0.01 .a 1pgndeoIea ~ 5 .E0 1
I Worksheet NRRIDSSAISPLB 1. Rev. 3.0
'March 2002Workshop Mgie*nEM fiWa l _
FIRE SPECIFICATIONS Fire Heat Release Rate (Q) kW170O.00 kW METHOD OF MCCAFFREY, QUINTIERE, AND HARKLEROAD MQH)
ATg = 6.85[02 /(A0(hv)1 2 ) (AThk)J"i3 Where ATg = Tg - To, upper layer gas temperature rise above ambient (K) 0 = heat release rate of the fire (kW)
Ao = area of ventilation opening (rnf) h,= height of ventilation opening (m) hk = convective heat trensfer coefficient (kW/m2 -K)
AT = total area of the compartment enclosing surface boundaries excluding area of vent openings (rr?)
Area of Ventilation Opening Calculation Ao = (wv)(hv)
Ao = 1.95 m2 Thermal Penetration Time Calculation 0Thc ater atl }e-rna tp = (pcp/)(5/2)2 Where p = interior construction density (kg/rn 3 )
cp = interior construction heat capacity (kJIKg-K) k = interior construction thermal conductivity (kW/m-K) 8 = interior construction thickness (m) tp= 26128.98 sec Heat Transfer Coefficient Calculation hk = (kpc/t)1/2 fort < tp Where kpc = interior construction thermal inertia (kW/M 2-K) 2 -sec (a thermal property of material responsible for the rate of temperature rise)
I = time after ignition (sec)
Area of Compartment Enclosing Surface Boundaries AT = [2(wcxlc) + 2(hcxwc) + 2(hcxlc)] - Ao AT = 1194.08 m2 Compartment Hot Gas Layer Temperature With Natural Ventilation ATg = 6.85[Q 2 /(Ao(hv)" 2) (AThk)]"1 3 ATg = Tg. To To= ATg + To RESULTS:
Time After l l hk ATq l T Tj Tj (min) (S) (kW/m'-K) l(K) l(K) l VC) l (°F)I 1 60 0.22 498.89 796.89 523.89 2975.
2 120 0.16 559.98 857.98 584.98 Il0841S9i 3 1 180 0.13 599.13 897.13 624.13 tIt355" 4 240 0.11 628.56 926.56 653.56 1t208:4 5 300 0.10 652.37 950.37 677.37 251 2
I Worksheet NRR/DSSAISPLB 1. Rev. 3.0 March 2002Workshop 10 600 0.0 73227 1l Is' L t1395f.0l 15 9 00 0.06 783.46 1081.46 808.46 1487423 1 20 100.5 821.94 11119.94 1-846.94 F55 A_
1.
Hot Gas Temperature Natural Ventilatio 0 5 10 15 20 time (min)
ESTIMATING SMOKE LAYER HEIGHT METHOD OF YAMANA AND TANAKA z = ((2kQ 1 13t/3Ac) + 01hcmT=
Where z = smoke layer height (m)
Q = heat release rate of the fire (kW) t = time after Ignition (sec) hc = compartment height (m)
Ac = compartment floor area (i 2 )
k = a constant given by k = 0.076/pg pg = hot gas layer density (kglrrP) pg is given by pg = 353/Tg TJ = hot gas layer temperature (K)
Compartment Area Calculation Ac = (wc) (Ic)
Ac = 339.47 m2 Hot Gas Layer Density Calculation po = 353trg Calculation for Constant K k= 0.076/pg Smoke Gas Layer Height With Natural Ventilation Z= ((2kQ' 3tf3Ac) + (1/hcw3))-
RESULTS:
3
'Worksheet NRRtDSSANSPLB 1. Rev. 3.0 March 2002Wodmhop lt pt k l Z l z (min) kg/m3 (m) 1 0.44 0.172 1.42 2 0.41 0.185 1.32 3 0.39 0.193 1.26 Kll 4 0.38 0.199 1.22 3a99 5 0.37 0.205 1.19 10 0.34 022 1.09 15 0.33 0.233 1.03 20 0.32 0.241 0.99 Smoke Gas Layer Height Natural Ventila 0 5 10 is 20 time (min)
NOTE 4
I I- infix '.4- Vk-
- a. Worksheet NRRIDSSANSPLB 3, Rev.3.0 March 2002 Workshop 0-
-.5 cr^ kNrt- c- ) t L'w METHOD OF ESTIMATING BURNING CHARACTERISTICS OF LIQUID POOL FIRE, HEAT RELEASE RATE, BURNING DURATION, AND FLAME HEIGHT VERSION 1.03
.Parameters'should be6 pecified ONLY:IN THE;;YELLOW INPUTPARAMETER BOXES.";';- iU INPUT PARAMETERS Fuel Spill Volume (V) .,,.Mi ,, gallons Fuel Spill Area or Dike Area (Adike) -:60.00 ft2 Mass Burning Rate of Fuel (m") - -0.039 kg/m2.sec Effective Heat of Combustion of Fuel (AHc,e:) '".46000 kJ/kg Fuel Density (P) =760 Ikg/m:
THERMAL PROPERTIES DATA R210iRNIlt 93ATF ESTIMA o = m'AHc.effAf Where 0 = pool fire heat release rate (kW) m' = mass burning rate of fuel per unit surface area (kg/m2 -sec)
AHc.en= effective heat of combustion of fuel (kJ/kg)
Al= Adike = surface area of pool fire (area involved in vaporization) (rrn) 1
Worksheet NRRIDSSAISPLB 3. Rev.3.0 March 2002 Workshop Heat Release Rate Calculation (Uquids with relatively high flash point, like transformer oil require 0 = m"AHcAf localized heafinq to achieve Ignition) rQ!5 ~ U10O0O.O8k 78.28 ANSWER ESTIMATING POOL FIRE BURNING DURATION tb = 4V/nD2 v Where tt = burning duration of pool fire (sec)
V = Volume of liquid (i 3)
D = pool diameter (m) v = regression rate (m/sec)
Pool Fire Diameter Calculation Ai = 0D2/4 (4Af/h) 112 D=
D= 2.664 m Calculation for Regression Rate v= m"Ip Where mH = mass burning rate of fuel (kgIm2-sec) p = liquid fuel density (kg/rr3)
V= 0.000051 m/sec Burning Duration Calculation th = 4V/nD2 v 66.17; iIOiWmUniIi= ANSWER Note that a liquid pool fire with a given amount of fuel can bum for long periods of time over small area or for short periods of time over a large area.
ESTIMATING POOL FIRE FLAME HEIGHT Hi = 0.235 Q2/5 . 1.02 D Where Hf = pool fire flame height (m) o = pool fire heat release rate (kW)
D = pool fire diameter (m)
Pool Fire Flame Height Calculation Hi= 0.235 P5 - 1.02 D
-_ ' j6.64N S It WE.78IANSWER NOTE
~~~~~~~~~~~~~~~11M MI. 5lX4 2
Worksheet NRR/DSSNSPLB 3, Rev.3.0 March 2002 Workshop
'g\-
METHOD OF ESTIMATING BURNING CHARACTERISTICS OF LIQUID POOL FIRE, HEAT RELEASE RATE, BURNING DURATION, AND FLAME HEIGHT VERSION 1.03 I1 IIa I II v. I" -- * * ** * * * -
- ~
Iftrameters sh-ould be s eclfiedOUNL-YJNTHE=YE-LLOW.INPUTPARAME=TER BOE.?§v
- -s * -~[i - -S *I. - . 0f9* - 0 Im 1-S.~~~~~1n15111 Hl I INPUT PARAMETERS Fuel Spill Volume (V) -' 5.00 gallons oI1 Fuel Spill Area or Dike Area (Adike) k:. 40.00 ft2 Mass Burning Rate of Fuel ( m") :i 0.039 kg/m 2-sec Effective Heat of Combustion of Fuel (AHcef) . . - 46000 kJ/kg Fuel Density (p) _ . ..
-.,. 760 ka/m 3
. .. . _ _ =,
THERMAL PROPERTIES DATA RBURNING RATE DATA FOR L lilin iHynlra~R ROn? FUFL5I ESTIMA o= m'AHce.efAt Where 0 = pool fire heat release rate (kW) mu = mass burning rate of fuel per unit surface area (kg/m 2 -sec)
AHc.et = effective heat of combustion of fuel (kJ/kg)
At= Adike = surface area of pool fire (area involved in vaporization) (rr?)
I
Worksheet NRRIDSSNSPLB 3. Rev.3.0 March 2002 Workshop Heat Release Rate Calculation (Uquids with relatively high flash point, like transformer oil require 0 = m"AHcAH localized heabing to achieve Ignition) 66666J . 31-8!85t8Tgl ANSWER ESTIMATING POOL FIRE BURNING DURATION t = 4V/hD 2 %'
Where th = burning duration of pool fire (sec)
V = Volume of liquid (in3)
D = pool diameter (m) v = regression rate (m/sec)
Pool Fire Diameter Calculation Ai = 02/4 D= (4Ar/h) 1'2 D= 2.175 m Calculation for Regression Rate v= m"/p Where rn" = mass burning rate of fuel (kg/m2 -sec) p = liquid fuel density (kg/m3)
V= 0.000051 rn/sec Burning Duration Calculation 2
tb = 4V/0Dv g AN95;ec% i~SW ,ii~ntERANSWER Note that a liquid pool fire with a given amount of fuel can bum for long periods of time over small area or for short periods of time over a large area.
ESTIMATING POOL FIRE FLAME HEIGHT Ht = 0.235 02/5 1.02 D Where Hr = pool fire flame height (m) o = pool fire heat release rate (kW)
D = pool fire diameter (m)
Pool Fire Flame Height Calculation Hf = 0.235 Q2I5- 1.02 D
=A SANSWER NOTE i s - R Wr l rME-211MM, 11121M w IF1w 2
E *
- Worksheet NRR/DSSNSPLB 3, Rev.3.0 March 2002 Workshop METHOD OF ESTIMATING BURNING CHARACTERISTICS OF LIQUID POOL FIRE, HEAT RELEASE RATE, BURNING DURATION, AND FLAME HEIGHT VERSION 1.03 Parameters should be s eclued ONLYIN THE YELLOW.INPUTPARAMETER BOXES.+ .j- i.fS-J
- i0 *0 -alar~lM~lzl-. e-1 -NL -.
- n
- , 0 ; -
E I IA t-- _ _IW_ WI _ IU31tolill
- INPUT PARAMETERS Fuel Spill Volume (V) ... 5.00 gallons Fuel Spill Area or Dike Area (Adike) '120.00 ft 2 I~ts
"- 0.039 kgfm -sec 2 Mass Burning Rate of Fuel (mi)
Effective Heat of Combustion of Fuel (AHc,eff) - 46000 kJ/kg 3
Fuel Density 6:) _
f";- `¢y760 ka/m THERMAL PROPERTIES DATA RIIRNING RATE ESTIMA
=1=t12'!-.
-7"-i-a fi~ ~a - . - -* - - . -- - .- -
o= m"AH.efAf Where a = pool fire heat release rate (kW) my = mass burning rate of fuel per unit surface area (kglm2 -sec)
AHc.ett = effective heat of combustion of fuel (kJ/kg)
Al= Arike = surface area of pool fire (area involved in vaporization) (rrS) 1
Worksheet NRR/DSSNSPLB 3, Rev.3.0 March 2002 Workshop Heat Release Rate Calculation (Uquids with relatively high flash point, like transformer oil require Q = m"AHcAf localized heabng to achieve Ignition)
.333 3Z59~ =kW BTIJgse ANSWER ESTIMATING POOL FIRE BURNING DURATION th 4V/nD 2v Where th = burning duration of pool fire (sec)
V = Volume of liquid (in3 )
D = pool diameter.(m) v = regression rate (rri/sec)
Pool Fire Diameter Calculation
-A, = TVA2/
D= (4A,/:r)112 D= 1.538 m Calculation for Regression Rate v= m"/p Where ml' = mass burning rate of fuel (kg/m 2 -sec) p = liquid fuel density (kg/r 3 )
v 0.000051 m/sec Burning Duration Calculation to = 4V/AD2 v
&2, _ ~'198Z e ANSWER Note that a liquid pool fire with a given amount of fuel can bum for long perIods of time over small area or for short periods of time over a large area.
ESTIMATING POOL FIRE FLAME HEIGHT Hi= 0.235 Q2 /5 -1.02 D Where Hr = pool fire flame height (m) o = pool fire heat release rate (kW)
D = pool fire diameter (m)
Pool Fire Flame Height Calculation Hr = 0.235 Q2/5- 1.02 D
=4A&: 1463 _ ANSWER NOTE I 471PG .'M #i RIO reaIiz-oaaIF.!ljaI i zIR1IFIIfeli 2
Worksheet NRRIDSSA/SPLB 9. Rev.0 March 2002 Workshop METHOD OF ESTIMATING TEMPERATURE OF A BUOYANT FIRE PLUME VERSION 1.0 IParameters-should bei secified ONLY IN THE YELLOW INPUT PARAMETER BOXES. ..s-.,-xt. -'s
,v~ . . .. a-. -. m]. a. r -e an
- fi a
- e. _
INPUT PARAMETERS --...... .....
Heat Rlease Rate of the Fire (0) .17000.00 kW Distance from the Top of the Fuel to the Ceiling (z) LL.~~~O0 ft Area of Combustible Fuel (AC) 5. 70.00 Ft2 AMBIENT CONDITIONS Ambient Air Temperature (To) 77.00 *F 29 Specific Heat of Air (cp) 1.00 kJ/kg-K Ambient Air Density (po) 1.20 kg/m3 Acceleration of Gravity (g) 9.81 mlsec2 Convective Heat Release Fraction (arc) 0.50 ESTIMATING PLUME CENTERLINE TEMPERATURE l e 'I '"".29 Tpwcenterline) - To = 9.1 (To/g CP2 p02)113 QC2'3 (z - zo)5' 3 Where Qc = Convective portion of the heat release rate (kW)
To = ambient air temperature (K) g = acceleration of gravity (m/sec 2 )
cp = specific heat of air (kJ/kg-K) po = ambient air density (kg/rn?)
z = distance from the top of the fuel package to the ceiling (m) zo = hypothetical virtual origin of the fire (m)
Convective Heat Release Rate Calculation c = xc a Where 0 = heat release rate of the fire (kW) xc = convective heat release fraction QC= 8500 kW Pool Fire Diameter Calculation 2
Adike = 7nD /4 1
D= (4 Aclkeht) ny D= 4.21 m Hypothetical Virtual Origin Calculation zo/D = -1.02 + 0.083 (0Y/5)/D Where zo = virtual origin of the fire (m) o= heat release rate of fire (kW)
D = diameter of pool fire (m) zoD= -0.05 zo= -0.21 m 1
I Worksheet NRRIDSSA/SPLB 9, Rev.0 March 2002 Workshop Centerline Plume Temperature Calculation 2 21 Tpwcentertine) - To = 9.1 (To/g Cp poY') QcY (z - zo)M Tp(centerline) - To= 388.17 Tp(centerjine) 686.17 K ANSWER NOTE 1~~. .r0 *0 3 .I Mm - S 0
- -. - 0ffl E r~0 0 0 I~~~ S E
-~EI 0 1a4!j*.lil .s 0 r .S** - .0. z0 0. - ; *I 0 I. 0-. - ; 0 i _ - S 2
Worksheet NRR/DSSAISPLB 9, Rev.0 March 2002 Workshop METHOD OF ESTIMATING TEMPERATURE OF A BUOYANT FIRE PLUME VERSION 1.0
~Parameters should be-specified ONLY-INTHEYELLOW INPUT-PARAMETER BOXES.tL-2zi:.A'..e,.L :
- 6_ -11 . - . A *e ;
04- -111
_6S
- 5. M INPUT PARAMETERS
, " -%- i1, Heat Rlease Rate of the Fire (Q) 12333.00 kW Distance from the Top of the Fuel to the Ceiling (z) I-i - 23.00 ft Area of Combustible Fuel (Ac) --150.00 ft 2 AMBIENT CONDITIONS Ambient Air Temperature (To) 77.00 F Specific Heat of Air (cp) 1.00 kJ/kg-K Ambient Air Density t(o) 1.20 kg/m3 Acceleration of Gravity (g) 9.81 rnrsec 2 Convective Heat Release Fraction (yc) 0.50 ESTIMATING PLUME CENTERLINE TEMPERATURE Ine ar-#nc6=_YM;gg_~RMdztfea 2, Tp(centerdlne) - To = 9.1 (To/g cp2 po2)1/3 QJ'3 (z zo)-5/3 Where QC = Convective portion of the heat release rate (kW)
To = ambient air temperature (K) g = acceleration of gravity (m/sec 2 )
cp = specific heat of air (kJ/kg-K) po = ambient air density (kg/rrP) z = distance from the top of the fuel package to the ceiling (m) zo = hypothetical virtual origin of the fire (m)
Convective Heat Release Rate Calculation QC = XCQ Where Q = heat release rate of the fire (kW)
Xc = convective heat release fraction Qc= 6166.5 kW Pool Fire Diameter Calculation Adike = 7D 2I4 D= (4 Acike/n)1 /2 D= 4.21 m Hypothetical Virtual Origin Calculation zo/D = -1.02 + 0.083 (Q2 5)/D Where zo = virtual origin of the fire (m) o = heat release rate of fire (kW)
D = diameter of pool fire (m) zo/D = -0.17 zn = -0.70 m 1
- 1. 11 Worksheet NRR/DSSAISPLB 9, Rev.0 March 2002 Workshop Centerline Plume Temperature Calculation Tp(centerfune) - To = 9.1 (Tolg Cp2 pg2 )1/3 oc= (z - zo) 5 Tp(centerline) - To= 280.79 Tp(centeruine) 578.79 K
=08 582AANSWER NOTE
- - S .** -0 - - 0 *0 -- 0 -
-l ~l u C.0 1 6 * . -- :. - 0 * , S. 0 BSt,:B
- S 0 0 - 0 - .0 00 0 0 00 - - 0*
2