ML18023A446
| ML18023A446 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 10/05/2017 |
| From: | Tennessee Valley Authority |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML18018A778 | List:
|
| References | |
| Download: ML18023A446 (15) | |
Text
BFN-26 Table 9.5-1 Sheet 1 ESTIMATED OFFGAS RELEASE RATES PER UNIT Activation Gases (Ci/sec)
Isotope Half-Life Evolution Rate Stack Release N-13 10 min 3.5 X 103 Negligible N-16 7.4 sec 1.47 X 108 Negligible 0-19 19 sec 0.9 X 106 Negligible Fission Product Gases (a)
Release rates are given in Ci/sec, based on modified gas mixture Discharge From 30-Min Charcoal Isotope Half-Life T=O Holdup Adsorbers Kr-83m 1.86 hr 3.4x103 2.9x103 1.0x101 Kr-85m 4.4 hr 6.1x103 5.6x103 5.2x102 Kr-85(b) 10.74 yr 10-20 10-20 10-20 Kr-87 76 min 2.0x104 1.5x104 3.7x100 Kr-88 2.79 hr 2.0x104 1.8x104 4.1x102 Kr-89 3.18 min 1.3x105 1.8x102 Kr-90 32.3 sec 2.8x105 Kr-91 8.6 sec 3.3x105 Mr-92 1.84 sec 3.3x105 Kr-93 1.29 sec 9.9x104 Kr-94 1.0 sec 2.3x104 Kr-95 0.5 sec 2.1x103 Kr-97 1 sec 1.4x101 Xe-131m 11.96 day 1.5x101 1.5x101 9.8x100 Xe-133m 2.26 day 2.9x102 2.8x102 2.7x101 Xe-133 5.27 day 8.2x103 8.2x103 3.0x103 Xe-135m 15.7 min 2.6x104 6.9x103 Xe-135 9.16 hr 2.2x104 2.2x104 Xe-137 3.82 min 1.5x105 6.7x102 Xe-138 14.2 min 8.9x104 2.1x104 Xe-139 40 sec 2.8x105 Xe-140 13.6 sec 3.0x105 Xe-141 1.72 sec 2.4x105 Xe-142 1.22 sec 7.3x104 Xe-143 0.96 sec 1.2x104 Xe-144 9 sec 5.6x102 Totals 2.5x106 1.0x105 4.0x103 (a) The release rate (R) of each noble gas can be expressed by the simplified form:
me-it Ri = Kgyii
BFN-26 Table 9.5-1 (cont'd)
ESTIMATED OFFGAS RELEASE RATES PER UNIT Sheet 2 The observed experimental data from several operating BWRs including KRB and Dresden 2 have shown a variation in individual noble gas isotopes with respect to each other that can be expressed in terms of variation in m, the exponent of the decay constant term (). The average measured value of m was 0.4 with a standard 7
deviation of +/- 0.07. With the R @ t=30 min set at 100,000 Ci/sec, the value of K is 2.6 X 10 . Y is the i g i fission yield for isotope i. Decay times (t) of 15.7 hrs and 181 hrs were used for Kr and Xe, respectively, in arriving at the values in the column headed "Discharge from Charcoal Adsorbers." These times include a 6 hr delay in the holdup pipe.
(b) Estimated from experimental observations.
BFN-26 Table 9.5-2 PROCESS INSTRUMENT ALARMS Main Control Room Functional Parameter Indicated Recorded Preheater discharge temperature - low X Recombiner catalyst temperature - high/low X X Offgas condenser drain well (dual) level - high/low X Offgas condenser gas discharge temperature - high X H2 analyzer (condenser discharged) (dual) - high X X Gas flow (offgas condenser discharge) - high/low X X Cooler - condenser discharge temperature - high/low X X Glycol solution temperature - high/low X X Gas reheater discharge humidity high X* X Prefilter P - high X Carbon bed temperature - high X X Carbon vault temperature - high/low X X Post filter P - high X Instrumentation elements:
Temperature - thermocouple Level - differential pressure diaphram Hydrogen - thermal conductivity Gas flow - flow orifice and thermal dispersion Differential pressure - differential pressure diaphragm
- Disconnected for Unit 2.
BFN-26 TABLE 9.5-3 OFFGAS SYSTEM MAJOR EQUIPMENT ITEMS Sheet 1 Offgas Preheaters Two Required.
5 Duty: 5.8 X 10 Btu/hr each 2
Construction: Stainless steel tubes and carbon steel shell. 300 ft (minimum). 350 psig shell design pressure, 1,000 psig tube design pressure. 400°F shell design temperature, 575°F tube design temperature.
Catalytic Recombiners Two Required.
6 Duty: 2.2 X 10 Btu/hr each Construction: Stainless steel cartridge, low alloy steel shell. Catalyst cartridge containing a precious metal catalyst on nichrome strips. Catalyst cartridge to be replaceable without removing vessel. 350 psig design pressure. 900°F design temperature.
Offgas Condenser One Required.
7 Duty: 1.25 X 10 Btu/hr 2
Construction: Low alloy steel shell. Stainless steel tubes. 600 ft (minimum) surface area. 350 psig shell design pressure.
250 psig tube design pressure. 900°F shell design temperature. 150°F tube design temperature.
Water Separator One Required.
Construction: Carbon steel shell, stainless steel wire mesh. 350 psig design pressure. 250°F design temperature.
Cooler Condenser 5
Duty: 1.1 X 10 Btu/hr 2
Construction: Stainless steel shell. Stainless steel tubes. 100 ft (minimum) surface area. 100 psig tube design pressure.
350 psig shell design pressure. 150°F tube design temperature. 150°F shell design temperature.
Moisture Separators (Downstream of Cooler-Condenser)
Two Required.
Construction: Carbon steel shell, stainless steel wire mesh. 350 psig design pressure. 150°F design temperature.
Gas Reheater One Required.
Duty: 2.8 kW (minimum) 2 Construction: Carbon steel shell. 14 ft surface area. 350 psig process pipe design pressure. 150°F design temperature.
BFN-26 TABLE 9.5-3 (Cont'd)
OFFGAS SYSTEM MAJOR EQUIPMENT ITEMS Sheet 2 Glycol Storage Tank One Required. 7.5 feet inside diameter, 9.5 feet high.
Construction: Carbon steel. 3,000 gal. Water-filled hydrostatic design pressure. 0°F design temperature. Code, API 650.
Glycol Solution Refrigerators and Motor Drives Two Required.
Duty: 9x104 Btu/hr each, single stage vapor compressor, 20 hp.
Construction: Conventional refrigerator units w/chilling self-contained and pump exchangers, glycol exit solution temperature 35°F.
Glycol Pumps and Motor Drives Two Required.
Duty: 65 gal./min. 5 hp Construction: Cast iron, 3-in. connections, 85 ft TDH, 0°F design temperature.
Glycol Tank Agitator and Motor Drive One Required Duty: 2 hp Eliminate thermal gradients in tank.
Prefilters and After Filters Two Required of each type.
Duty: 160 cfm rating at 1 in. H20P (clean)
Construction: Carbon steel shell. High efficiency moisture resistant filter element. Flanged shell. 350 psig design pressure.
150°F design temperature.
Carbon Bed Adsorbers Quantity: 6 Beds Construction: Carbon steel, 4 ft o.d. (5/8 inch wall) x 21 ft 6-1/8 inch length vessels each with a 16-ft packed section containing 3 tons of 8-16 mesh carbon (~200 ft3 of activated carbon) Columbia G or equivalent. Design pressure 350 psig. Design temperature 150°F.
A flow distributor will be placed in the inlet of each column. Channeling is precluded by use of a vertical bed and a large bed to 1
particle diameter ratio (~500). Underhill has stated that channeling or wall effects may reduce efficiency of the holdup bed if this ratio is not greater than 12.
BFN-26 Table 9.5-4 EQUIPMENT MALFUNCTION ANALYSIS Sheet 1 Equipment Item Malfunction Consequences Design Precautions Preheaters Steam leak Would further dilute process Spare preheater.
offgas Steam consumption would increase.
Low pressure Recombiner performance would Low temperature alarms on steam supply fall off at low power level, preheater exist and recom-and hydrogen content of recom- biner inlet. Recombiner biner gas discharge would H2 analyzer.
increase, eventually to a combustible mixture.
Recombiners Catalyst Temperature profile changes Temperature probes in gradually through catalyst. Eventually recombiner and H2 deactivates excess H2 would be detected analyzer provided.
by H2 analyzer or by gas Spare recombiner.
flowmeter. Eventually the gas could become combustible.
Catalyst H2 conversion falls off Condensate drains, gets wet at and H2 is detected by down- temperature probes in start stream analyzers. Eventually recombiner. Air bleed the gas could become system at startup.
combustible. Recombiner thermal blanket, spare recombiner and heater. (For Units 2 & 3, low condenser vacuum scram has been removed.) Hydrogen analyzer.
Recombiner Cooling The coolant (reactor conden- None.
Condenser water sate) would leak to the leak process gas (shell) side.
This would be detected if drain-well liquid level increases. Moderate leakage would be of no concern from a process standpoint. (The process condensate drains to the hotwell.)
Drain well Liquid level If both drain valves fail to Two separate drain systems instruments open, water will build up in are provided each with high fail the condenser and pressure and low level alarms.
drop will increase.
The high P, if not detected by instrumentation, could cause pressure buildup in the main condenser and eventually initiate a reactor scram. If a drain valve fails to close, gas will recycle to the main condenser, increase the load on the SJAE, and cause back pressure on the main condenser, eventually causing a reactor scram.
BFN-26 Table 9.5-4 (Continued)
EQUIPMENT MALFUNCTION ANALYSIS Sheet 2 Equipment Item Malfunction Consequences Design Precautions Water Corrosion of Higher quantity of water Stainless steel separator wire mesh collected in holdup line and mesh specified.
element routed to radwaste.
Six-hour Corrosion of Leakage to soil of gaseous Outside of pipe dipped and holdup line line and liquid fission products wrapped. Dehumidification coil provided.
Cooler- Corrosion of Glycol-water solution would Stainless-steel-finned condensers finned tube leak into process (shell) tubes specified. The side and be discharged to inventory of glycol-water clean radwaste. If not can be observed in tank.
detected at radwaste, the glycol solution would dis-charge to the reactor conden-sate system.
Icing up of Shell side of cooler could Design glycol-H2O finned tube plug up with ice, gradually solution temperature of 33 building up pressure drop. to 50°F. Redundant If this happens, the spare temperature indication unit could be activated. and alarm systems.
Complete blockage of both units would increase P and lead to a reactor scram.
Moisture Corrosion of Increased moisture would be Stainless steel mesh speci-separators wire mesh retained in process gas fied. Relative humidity element routed to charcoal1 adsor- instrumentation provided.
bers. Over a long period, the charcoal1 performance would deteriorate as a result of moisture pickup.
Gas reheater Heater Cool gas, saturated with Dual heating circuits element water vapor would enter the provided. Moisture failure charcoal adsorbers. recorder and high moisture Eventually, charcoal1 per- alarm. (Alarm for formance will deteriorate as Unit 2 is disconnected.)
charcoal1 moisture content increases, and plant emissions will increase.
Prefilters Hole in More radioactivity would P instrumentation filter media deposit on the charcoal1 in provided. Spare unit the first adsorber vessel of provided.
the train. This would increase the radiation level in the charcoal1 vault and make maintenance more difficult.
1Charcoal 1Charcoal 1Charcoal performance will Highly instrumented, adsorbers gets wet deteriorate gradually as mechanically simple gas charcoal gets wet. Holdup dehumidification system times for krypton and xenon with redundant equipment.
will decrease, and plant emissions will increase.
BFN-26 Table 9.5-4 (Continued)
EQUIPMENT MALFUNCTION ANALYSIS Sheet 3 Equipment Item Malfunction Consequences Design Precautions Vault air Mechanical If ambient temperature exceeds Spare refrigerator unit conditioning failure approximately 80°F, increased provided.
units emission could occur.
If ambient temperature is Vault temperature alarms below approximately 60°F, provided.
charcoal1 could pick up additional moisture.
After Hole in Probably of no real conse- P instrumentation 1
filters filter media quence. The charcoal media provided. Spare unit itself should be a good filter provided.
at the low air velocity.
Glycol Mechanical If spare unit fails to oper- Spare refrigerator refrigera- failure ate, the glycol solution Glycol solution machines temperature will rise and the temperature alarms dehumidification system provided.
performance will deteriorate.
This will cause gradual buildup of moisture on the charcoal,1 with increased plant emissions.
Steam jet Low flow of When the hydrogen and oxygen The normal steam pressure to the air ejectors motive high concentrations exceed 4 and 5 ejectors is 200 psig. If the steam pressure vol %, respectively, the pro- supply pressure to the operating steam cess gas becomes combustible. air ejector drops to 170 psig, the steam supply to the SJAE is shut off. If the steam supply pressure for the standby unit is also less than 170 psig, the steam supply to the standby SJAE is shut off. If neither SJAE is in operation, condenser back pressure will continue to increase.
By ensuring adequate steam supply to the SJAEs, the 02 concentration cannot get as high as 5 percent.
Inadequate steam flow will Steam flow to be held at cause overheating and deter- constant maximum flow ioration the catalyst. regardless of plant power level.
Wear of Increased steam flow to steam supply recombiner. This could nozzle of reduce degree of recombina-ejector tion at low power levels.
1 The term "activated carbon" would be more appropriate than the term "charcoal."
BFN-26 TABLE 9.5-5 ISOTOPIC INVENTORY-CHARCOAL OFFGAS SYSTEM (c)
Sheet 1 Offgas Cooler Charcoal First Recom- Con- Water Holdup Con- Moisture Vessel Charcoal Component Preheater biner denser Separator Pipe denser Separator Reheater Prefilter Train Vessel Afterfilter Kr-9.7 Hr Kr-1.6 Hrs.
Residence Time 0.8 Sec 0.94 Sec 50 Sec 5.1 Sec 6 Hr 178 Sec 6.5 Sec 14.5 Sec 43.5 Sec Xe-7.3 Day Xe-1.2 Day 43.5 Sec Operating Time 0 0 0 0 0 0 0 0 1 Yr 10 Yr 10 Yr 1 Yr Solid Daughter Capture 0 0 100% 100% 60% 0 0 0 100% 100% 100% 100%
Solid Daughter Washout - - 100% 100% 100% - - - 0 0 0 0 Isotope Kr-83M 2.77+3 3.26+3 1.73+5 1.76+4 2.98+7 6.57+4 2.38+3 5.30+3 1.58+4 3.43+6 1.59+6 4.33+2 Kr-85M 4.92+3 5.78+3 3.07+5 3.13+4 8.57+7 4.22+5 154+4 3.42+4 1.03+5 4.21+7 1.21+7 2.22+4 Ke-85 1.90+1 2.24+1 1.19+3 1.21+2 5.14+5 4.26+3 1.56+2 3.48+2 1.03+3 8.38+5 1.39+5 1.03+3 Kr-87 1.57+4 1.85+4 9.79+5 9.95+4 1.23+8 1.28+5 4.62+3 1.03+4 3.07+4 4.61+6 2.72+6 1.52+2 Rb-87 0 0 0 0 0 0 0 0 0 6.38-4 3.76-4 0 Kr-88 1.61+4 1.90+4 1.01+6 1.02+5 2.26+8 8.01+5 2.90+4 6.48+4 1.94+5 5.87+7 2.13+7 1.74+4 Rb-88 4.21+0 1.57+1 1.74+4 1.70+2 1.31+8 3.85+5 1.49+4 3.36+4 3.75+6 5.87+7 2.13+7 1.74+4 Kr-89 9.67+4 1.13+5 5.50+6 5.07+5 2.71+7 0 0 0 0 0 0 0 Rb-89 2.94+1 1.09+2 1.14+5 9.84+2 1.63+7 1.29-1 4.38-3 9.70-3 8.76-1 0 0 0 Sr-89 1.27-6 1.15-5 3.17-1 2.65-4 5.14+4 3.04+2 1.11+1 2.48+1 1.07+7 0 0 0 Y-89M 0 0 1.23-1 1.44-5 5.13+4 3.04+2 1.11+1 2.48+1 1.07+7 0 0 0 Kr-90 1.67+5 1.93+5 6.23+6 3.35+5 2.89+6 0 0 0 0 0 0 0 Rb-90 2.87+2 1.06+3 7.95+5 3.70+3 1.73+6 0 0 0 0 0 0 0 Sr-90 0 0 1.15-2 4.83-6 2.81+1 1.56-1 5.71-3 1.27-2 2.74+4 0 0 0 Y-90 0 0 0 0 8.83-1 9.77-3 3.58-4 7.99-4 2.71+4 0 0 0 Kr-91 8.62+4 9.44+4 1.18+6 7.19+3 1.41+4 0 0 0 0 0 0 0 Rb-91 4.17+2 1.50+3 5.10+5 2.30+2 8.49+3 0 0 0 0 0 0 0 Sr-91 2.23-3 2.02-2 2.36+2 8.09-3 2.95+3 1.30+1 4.75-1 1.06+0 3.67+3 0 0 0 Y-91M 0 1.29-6 8.30-1 2.39-6 2.43+3 1.41+1 5.15-1 1.15+0 4.02+3 0 0 0 Y-91 0 0 1.32-6 0 3.18+0 3.94-2 1.44-3 3.23-3 5.58+3 0 0 0 Kr-92 1.41+3 1.20+3 2.81+3 1.58+1 2.70+0 0 0 0 0 0 0 0 Rb-92 8.82+1 2.67+2 5.06+3 2.11+6 1.62+0 0 0 0 0 0 0 0 Sr-92 1.74-3 1.42-2 1.65+1 4.36+2 1.28+0 2.92-3 1.06-4 2.36-4 2.27-1 0 0 0 Y-92 0 0 1.97-2 4.29-2 6.30-1 4.17-3 1.52-4 3.39-4 6.56-1 0 0 0 Kr-93 4.53+1 3.35+1 5.10+1 0 0 0 0 0 0 0 0 0
BFN-26 TABLE 9.5-5 (Cont'd)
ISOTOPIC INVENTORY-CHARCOAL OFFGAS SYSTEM (c)
Sheet 2 Offgas Cooler Charcoal First Recom- Con- Water Holdup Con- Moisture Vessel Charcoal Component Preheater biner denser Separator Pipe denser Separator Reheater Prefilter Train Vessel Afterfilter Rb-93 2.22+0 6.47+0 1.21+2 0 0 0 0 0 0 0 0 0 Sr-93 9.51-4 7.53-3 8.01+0 0 0 0 0 0 0 0 0 0 Y-93 0 0 3.30-3 0 0 0 0 0 0 0 0 0 Zr-93 0 0 0 0 0 0 0 0 0 0 0 0 Nb-93M 0 0 0 0 0 0 0 0 0 0 0 0 Kr-94 1.20+0 7.77-1 8.46-1 0 0 0 0 0 0 0 0 0 Rb-94 1.27-1 3.30-1 2.37+0 0 0 0 0 0 0 0 0 0 Sr-92 3.22-4 2.37-3 9.57-1 0 0 0 0 0 0 0 0 0 Y-94 0 0 1.35-2 0 0 0 0 0 0 0 0 0 Kr-95 7.16-6 2.56-6 0 0 0 0 0 0 0 0 0 0 Rb-95 3.99-6 4.24-6 2.44-6 0 0 0 0 0 0 0 0 0 Sr-95 0 0 1.78-6 0 0 0 0 0 0 0 0 0 Y-95 0 0 0 0 0 0 0 0 0 0 0 0 Zr-95 0 0 0 0 0 0 0 0 0 0 0 0 Nb-95M 0 0 0 0 0 0 0 0 0 0 0 0 Kr-97 7.22-4 4.66-4 5.08-4 0 0 0 0 0 0 0 0 0 Rb-97 5.68-4 5.37-4 5.90-4 0 0 0 0 0 0 0 0 0 Sr-97 2.40-4 5.57-4 8.99-4 0 0 0 0 0 0 0 0 0 Y-97 3.44-5 2.29-4 1.43-3 0 0 0 0 0 0 0 0 0 Zr-97 0 0 0 0 0 0 0 0 0 0 0 0 Nb-97 0 0 0 0 0 0 0 0 0 0 0 0 Xe-131M 1.21+1 1.42+1 7.56+2 7.72+1 3.24+5 2.65+3 9.69+1 2.16+2 6.49+2 7.66+6 1.51+6 4.25+2 Xe-133M 2.22+2 2.61+2 1.39+4 1.41+3 5.76+6 4.57+4 1.67+3 3.72+3 1.11+4 6.45+7 2.25+7 1.19+3 Xe-133 6.60+3 7.76+3 4.13+5 4.21+4 1.75+8 1.42+6 5.19+4 1.16+5 3.47+5 3.26+9 7.78+8 1.36+5 Xe-135M 2.09+4 2.45+4 1.28+6 1.28+5 3.40+7 5.20-1 1.77-2 3.93-2 1.15-1 3.54+0 3.54+0 0 Xe-135 1.78+4 2.09+4 1.11+6 1.13+5 3.97+8 2.58+6 9.43+4 2.22+5 6.45+5 7.06+8 6.28+8 1.16+0 Cs-135 0 0 0 0 2.63-2 2.64-4 9.73-6 2.17-5 4.74+1 2.13+3 1.89+3 0 Xe-137 1.18+5 1.39+5 6.84+6 6.42+5 4.14+7 0 0 0 0 0 0 0 Cs-137 3.45-5 1.29-4 1.37-1 1.19-3 3.84+2 2.14+0 7.83-2 1.75-1 3.75+5 0 0 0 Ba-137M 0 0 1.02-2 9.15-6 3.80+2 2.14+0 7.83-2 1.75-1 3.75+5 0 0 0
BFN-26 TABLE 9.5-5 (Cont'd)
ISOTOPIC INVENTORY-CHARCOAL OFFGAS SYSTEM (c)
Sheet 3 Offgas Cooler Charcoal First Recom- Con- Water Holdup Con- Moisture Vessel Charcoal Component Preheater biner denser Separator Pipe denser Separator Reheater Prefilter Train Vessel Afterfilter Xe-138 7.11+4 8.34+4 4.35+6 4.34+5 1.04+8 3.32-1 1.12-2 2.49-2 7.29-2 2.03+0 2.03+0 0 Cs-138 1.02+1 3.81+1 4.18+4 3.97+2 6.26+7 1.98+3 7.01+1 1.56+2 2.98+4 2.03+0 2.03+0 0 Xe-139 1.76+5 2.03+5 7.18+6 4.41+5 4.78+6 0 0 0 0 0 0 0 Cs-139 8.73+1 3.23+2 2.72+5 1.41+3 2.87+6 0 0 0 0 0 0 0 Ba-139 3.20-3 2.99-2 7.01+2 3.36-1 2.71+6 2.64+3 9.50+1 2.12+2 1.05+5 0 0 0 Xe-140 1.21+5 1.36+5 2.63+6 5.50+4 1.94+5 0 0 0 0 0 0 0 Cs-140 5.28+2 1.92+3 9.11+5 1.56+3 1.16+5 0 0 0 0 0 0 0 Ba-140 8.87-5 8.11-4 1.23+1 1.71-3 1.56+3 8.53+0 3.11-1 6.95-1 7.64+4 0 0 0 La-140 0 0 8.69-4 0 7.76+1 8.43-1 3.09-2 6.90-2 7.74+4 0 0 0 Xe-141 7.19+2 5.96+2 1.29+3 0 0 0 0 0 0 0 0 0 Cs-141 8.45+0 2.68+1 1.92+3 0 0 0 0 0 0 0 0 0 Ba-141 1.46-3 1.22-2 3.68+1 0 0 0 0 0 0 0 0 0 La-141 0 0 3.33-2 0 0 0 0 0 0 0 0 0 Ce-141 0 0 0 0 0 0 0 0 0 0 0 0 Xe-142 2.20+1 1.58+1 2.24+1 0 0 0 0 0 0 0 0 0 Cs-142 3.46+0 8.81+0 4.79+1 0 0 0 0 0 0 0 0 0 Ba-142 1.06-3 7.76-3 3.01+0 0 0 0 0 0 0 0 0 0 La-142 0 0 9.02-3 0 0 0 0 0 0 0 0 0 Xe-143 4.17-1 2.63-1 2.71-1 0 0 0 0 0 0 0 0 0 Cs-143 6.68-2 1.61-1 7.23-1 0 0 0 0 0 0 0 0 0 Ba-143 1.09-3 7.60-3 8.85-1 0 0 0 0 0 0 0 0 0 La-143 0 2.40-6 2.45-2 0 0 0 0 0 0 0 0 0 Ce-143 0 0 2.73-6 0 0 0 0 0 0 0 0 0 Pr-143 0 0 0 0 0 0 0 0 0 0 0 0 Xe-144 1.55+2 1.70+2 2.22+3 1.57+1 3.26+1 0 0 0 0 0 0 0 Cs-144 3.35+1 9.64+1 2.41+3 1.14+1 1.95+1 0 0 0 0 0 0 0 Ba-144 5.38-1 4.15+0 2.18+3 1.31+0 1.95+1 0 0 0 0 0 0 0 La-144 1.87-3 3.46-2 7.74+2 3.24-2 1.95+1 0 0 0 0 0 0 0 Ce-144 0 0 3.86-4 0 1.18-2 0 0 0 0 0 0 0 Pr-144 0 0 3.20-6 0 1.10-2 0 0 0 0 0 0 0
BFN-26 TABLE 9.5-5 (Cont'd)
ISOTOPIC INVENTORY-CHARCOAL OFFGAS SYSTEM (c)
Sheet 4 Offgas Cooler Charcoal First Recom- Con- Water Holdup Con- Moisture Vessel Charcoal Component Preheater bier denser Separator Pipe denser Separator Reheater Prefilter Train Vessel Afterfilter N-13 6.73-3 7.90+3 4.08+5 4.03+4 6.86+6 2.07-5 0 1.50-6 4.34-6 8.39-5 0 0 N-16 4.72-7 5.09-7 5.30+8 1.62+6 2.52+6 0 0 0 0 0 0 0 N-17 4.43+3 4.50+3 2.66+4 3.57+0 2.66 0 0 0 0 0 0 0 O-19 7.12+5 8.18+5 2.41+7 1.13+6 8.01+6 0 0 0 0 0 0 0 Iodine - - - - - - - - 8.70+4 8.70+4 8.70+4 0 TOTAL 4.88+7 5.28+7 5.96+8 7.87+6 1.49+9 5.87+6 2.15+5 4.91+5 2.77+7 4.21+9 1.48+9 1.96+5
BFN-26 TABLE 9.5-5 (Cont.)
ISOTOPIC INVENTORY-CHARCOAL OFFGAS SYSTEM (c)
Sheet 5 Gas Solid Gas Gas Component Kr + Xe Daughters Kr Xe Preheater 9.24 + 5 1.4 + 3 3.91 + 5 5.33 + 5 Recombiner 1.06 + 6 1. + 4 4.48 + 5 6.1 + 5 Offgas Condenser 3.92 + 7 2.69 + 6 1.54 + 7 2.38 + 7 Water Separator 2.96 + 6 2.12 + 6 1.10 + 6 1.86 + 6 Holdup Pipe 1.25 + 9 2.4 + 8 4.95 + 8 7.6 + 8 Cooler Codenser 5.40 + 6 4.7 + 5 1.42 + 6 3.98 + 6 Moisture Separator 1.97 + 5 1.8 + 4 5.16 + 4 1.45 + 5 Gas Reheater 4.39 + 5 5.2 + 4 1.15 + 5 3.24 + 5 Prefilter 1.31 + 6 6.4 + 6 3.44 + 5 9.7 + 5 Carbon Bed Train 4.15 + 9 5.87 + 7 1.10 + 8 4.04 + 9 First Carbon Bed 1.46 + 9 2.13 + 7 3.78 + 7 1.42 + 9 Afterfilter 1.78 + 5 1.74 + 4 4.11 + 4 1.37 + 5
BFN-26 TABLE 9.5-6 RADIOLOGICAL EXPOSURES - MODIFIED OFFGAS SYSTEM COMPONENT FAILURE Resultant Component Pri. Act. % Exposure Failed Released Released at 1400M 1st C. Bed Iodine 1% 5.6 mr 6 C. Beds Noble Gas 10% 0.6 mr Prefilter Particulate 1% 2.6 mr Hold-up Pipe Particulate 20% 10.2 mr Total System All See above 20.2 mr*
- There is a 1.2 mr contribution from failure of all other components listed in Table 9.5-5.
BFN-26 Table 9.5-7 EFFLUENT - GLAND SEAL OFFGAS SUBSYSTEM*
Release Rate to Environment Isotope c/sec Kr-83m 3.4 x 100 Kr-85m 5.7 x 100 Kr-85 8.3 x 10-3 Kr-87 2.0 x 101 Kr-88 1.9 x 101 Kr-89 1.3 x 102 Kr-90 5.4 x 101 Kr-91 4.3 x 10-1 Xe-131m 1.3 x 10-2 Xe-133m 2.1 x 10-2 Xe-133 5.4 x 100 Xe-135m 2.9 x 101 Xe-135 1.9 x 101 Xe-137 1.6 x 102 Xe-138 1.0 x 102 Xe-139 8.0 x 101 Xe-140 2.8 x 100
- Table taken from response to AEC Question 9.4, dated March 25, 1971.