10 CFR 50.71(e) - Maritime Administration - U.S. Department of ...

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Updated Final Safety Analysis Report - (STS-004-002)redirected upward toward the air cooler section. The air-moisture mixture then flowed over a seriesof baffles toward the sea water inlet end of the condenser, where it was drawn outward into the airejector suction lines.Condensate collecting at the bottom of the condenser was exposed to bypass steam in the hot wellsection. This heated the liquid droplets to saturation temperature and caused the subsequent releaseof any entrained noncondensible vapors. These vapors were vented to the air cooler section whilethe deaerated condensate drops to the hot well section for removal by the condensate pumps.Two main dump steam nozzles are provided on the shell of the condenser at the sea water inlet side.These consist of 6-inch flanges and diffuser-plates to prevent direct steam impingement on the tubes.The total dump capacity was 190,000 lb/hr. A similar auxiliary steam dump connection on theopposite end has a capacity of 35,000 lb/hr at 35 psig.A waste discharge connection is provided to the salt water inlet side of the water box together with asampling connection from the discharge side of the condenser. Radioactive liquid waste from thewaste dilution and disposal (WD) system could have been diluted and discharged via the maincondenser.In addition to annual inspections required by the USCG, a series of periodic Probolog inspectionswere performed on the main condenser tubes as a check of tube wall deterioration. As a result ofthese inspections, some tubes have been plugged using 25% wastage as a criterion for plugging atube. The total plugged represents a negligible loss of condensing surface area; there has been nodetectable effect on the main engine or overall plant performance.8.3.6 Main Condensate and Feedwater SystemAll of the main condensate and feedwater system equipment is deactivated, drained, disabled andperforms no active function.The main condensate and feedwater system consists of a regenerative heat system employing threestages of feedwater heating and two stages of condensate deaeration. Condensate was drawn fromthe condenser hot wells by two main condensate pumps and was pumped through the main airejector, the low pressure heater, and the deaerating feedwater heater. The three feed pumps drewwater from the deaerating feedwater heater and supplied it through the high-pressure heater to thesteam generators.8.3.2.1. Feedwater ControlsAll of the feedwater control system equipment is deactivated, drained, disabled and performs noactive function.Water levels in the boilers were maintained by one of three main feed pumps. Two of thesepumps were steam turbine driven and were classified as main feed pumps. The third pump wasmotor driven and was designated as the port feed pump. The main feed pumps were rated at735 gpm and were capable of maintaining the required feed flow rate at maximum power. Theport feed pump was rated at 125 gpm and was capable of providing the required feed flowduring port operation as well as reduced sea operation (about half speed).8.3.2.2. Main Air EjectorsAll of the main air ejector equipment is deactivated, drained, disabled and performs no activefunction.Rev. VI 76
Updated Final Safety Analysis Report - (STS-004-002)The main air ejectors are twin-stage, twin-element units with surface type inter- and aftercondensers.Each unit consists of two first-stage and two second-stage ejectors mounted on asingle housing, which contains the inter- and after-condensers in separate compartments.Suitable valving was provided to permit the use of either or both elements.Air and noncondensible vapors were drawn from the air cooler section of the main condenser bythe first-stage nozzle assembly and discharged to the inter-condenser. Any moisture presentwas condensed by the cool condensate that was flowing through the tube side of the heatexchanger. The collected liquid was then drained by way of the loop seal to the maincondenser. The air and noncondensible vapors were then drawn from the inter-condensersection by the second-stage steam nozzle and discharged to the after-condenser section. Theafter-condenser drains were directed to the atmospheric drain tank while the air andnoncondensible vapors were drawn into the gland seal exhaust system.8.3.2.3. Gland Seal Exhaust SystemAll of the main condensate and feedwater system equipment is deactivated, drained, disabledand performs no active function.The main engine turbine rotors were sealed against in-leakage of air by a series of steam-sealedlabyrinths located at the casing penetrations. The sealing steam was normally supplied at 0.5 to2.0 psig from an auxiliary steam system. The excess steam from the seals was removed bypiping the leak off connections to the after-condenser section of the main air ejector. Thecondensed steam then combines with the second-stage nozzle discharge and drains back to theatmospheric drain tank.A gland seal exhaust fan, rated at 200 cfm with 100°F air at a static head of 10 inches of water,took suction from the after-condenser section of the main air ejector and discharged to an aircooled, shell-and-tube gland exhaust condenser. Any remaining entrained moisture wascondensed and drained to the low-pressure drain system. The combined air and noncondensiblevapors were discharged to an engine room exhaust system.The gland seal exhaust system effluent was continuously sampled by the radiation monitoringsystem for radioactive particulate daughter products of fission gases. This detectorarrangement, operating in conjunction with secondary system water sampling, served as anearly warning for the presence of a primary-to-secondary system leak.8.4 Emergency Propulsion SystemAll of the emergency propulsion system equipment is deactivated, disabled and performs no activefunction. Emergency Propulsion was provided by the 440 v-ac, 750 HP auxiliary propulsion motor.8.5 Electrical Power SystemsThe following portions of the electrical power system equipment are deactivated, disabled and perform noactive function:Ship’s Service Turbine generators;Auxiliary diesel generators;Motor generator sets;Battery backup systems; and,Emergency diesel generator.Rev. VI 77
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10 CFR 50.71(e) - Maritime Administration - U.S. Department of ...

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