ML20198B985
| ML20198B985 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay |
| Issue date: | 05/16/1986 |
| From: | PACIFIC GAS & ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML20198B910 | List: |
| References | |
| NUDOCS 8605220192 | |
| Download: ML20198B985 (5) | |
Text
Attachment S TECHNICAL SPECIFICATION PAGES Design Features IV.A.S.e, Page IV-4 Design Features VII.A.2, Page VII-1 .
Operating Limits and Requirements VII.B.2, Page VII-3
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8605220192 860516 PDR ADOCK 05000133 P PDR 0820S/0044K
. IV-4 from ATSH A-106 Grade B carbon steel. The line shall be designed for 1250 psig and 575'F under the ASME Boiler and Pressure Vessel Code and the ASA Code for Pressure Piping. This line shall leave the dry well through two motor operated gate type isolation valves (one a-c and one d-c powered).
- b. Turbine Generator Unit - The turbine generator unit, including its controls and auxiliaries, shall be designed for operation on saturated steam. The turbine shall be a 3600 rpm, tandem compound, double flow, condensing unit direct connected to a hydrogen cooled generator. The expected capability rating of the turbine shall be 70,000 kw at 1,120 psig, saturated, and 1.5 inches of mercury absolute exhaust pressure.
The generator shall be rated at 76,800 kva with a 0.85 power factor and 30 psig hydrogen pressure. The turbine speed and load control system shall consist of a load limit, a speed governor, and an initial pressure regulator. The initial pressure regulator shall be a narrow band proportional control device which is capable of maintaining approximately constant reactor pressure by varying the steam flow to the turbine.
- c. Main Condenser - Steam exhausted from the turbine-generator unit shall be condensed in the main condenser. The main condenser shall be capable of handling turbine exhaust flow plus heater and miscellaneous drains when the turbine-generator is operating at 70 Mw electrical. The condenser shall be capable of handling up to 870,000 pounds of steam per hour
-- through the bypass valve system when the turbine stop valve is closed.
Low condenser vacuum, in addition to scramming the reactor as described in Section VI, shall trip the turbine stop valve and bypass valves closed. The main condenser shall have a 6,500 gallon hotwell designed to hold up the condensate for a minimum of three minutes for decay of short-lived activity.
- d. Turbine Steam Bvoass System - Two turbine steam bypass valves with a combined design capacity of 750,000 pounds per hour at 1,075 psig shall be provided for the purpose of increasing the reliability of the Unit.
These valves shall automatically open on turbine-generator load rejection or if reactor pressure increases to the set point of the bypass valve control system. Normally the set point shall be 10 psi above normal full load reactor pressure. The bypass valves shall discharge reactor steam directly to the main condenser.
- e. Condensate and Feedwater System - Two 900 gpm half-capacity condensate pumps of conventional design shall be provided to pump the condensate from the main condenser hotwell through the condensate system. The condensate system shall be designed for 210 psig and 300*F.
The removal of turbine plant system corrosion products from the condensate shall be accomplished by two half-capacity mixed-bed l demineralizers and their associated resin regeneration equipment. The demineralizers shall be capable of removing an average of 757. of the ionic constituents in the influent at flow rates of 375 pgm to 785 gpm.
Condensate leaving the demineralizers shall pass through two NOTE: Remainder of paragraph is on original TS page IV-5 AMENDMENT NO.
OS205/0044K
VII-l MONT0 RING SYSTEMS A. DESIGN FEATURES
- 1. Air Ejector Off-Gas Monitorina System - The gases from the air ejector discharge shall be monitored by two separate gamma monitoring systems using ion chamber detectors which shall be designed'to detect the noble gas fission products indicative of fuel cladding failures.
One of these monitoring systems shall be an operating spare. The sampling system shall be designed to hold up the gas sample to allow time for the decay of nitrogen-16 and other short lived activities.
The off-gas monitoring channels shall be calibrated so that their indicated and recorded output can be evaluated in terms of microcuries of noble gas and gaseous activation products per unit volume of off-gas. Off-gas flow shall be monitored by a flow indicator in the control room. The information from the radiation recorders and the flow indicator shall permit evaluation of noble gas and gaseous activation products release rates in the range of 10-4 to 10 curies per second. j
- 2. Stack Gas Monitorina System - A system shall be provided to determine routine releases of particulate radioactivity and to provide monitoring and annunciation of nonroutine releases of radioactive noble gases. The stack gas monitoring system shall consist of a l
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particulate filter holder, a beta sensitive detector system, and a '
sample pump to produce a sample flow controlled at approximately 2 cfm. The particulate filters are removed for laboratory counting.
The detector system shall have two detectors (one is an operating spare) which respond to radioactive (beta emitting) gases that pass through the system. The detector system shall be designed to be sensitive to Kr85 in to approximately2x10ghestackgasfromapproximately5x10-7 microcuries/cc.
- 3. Emeroency Condenser Vent Monitors - The normally n' o n-radioactive steam which is discharged directly to the envirens when the emergency condenser is activated shall be monitored by means 'of two gamma sensitive channels employing halogen quenched GM tubes as sensing elements. These channels shall have a range of 0.01 to 100 mr/hr.
One of the channels shall be a part of the area monitoring system which is described below. The other channel shall provide local indication. Both channels shall be provided with an alarm to warn the operator of the release of radioactivity in the event a gross leak should occur in the emergency condenser coils. Also, the emergency condenser shall be provided with a temperature alarm to warn the operator of a coil leak during the periods of normal operation when the emergency condenser is not in service.
- 4. Liauid Haste System Vent Monit_Qr - A fixed gamma monitor employing a halogen quenched GM tube as the sensor shall be installed on a vent header which collects all vents from the radwaste facility. The monitor shall have a range of 0.01 to 100 mr/hr and its output shall be recorded in the control room. It shall be provided with an alarm which shall be annunciated in the control room.
AMENDMENT NO.
OS20S/0044K
. VII-3A also provide gamma monitoring of the fuel storage areas. A high radiation level signal from either of these channels shall sound the !
evacuation horns in the refueling building.
In addition to the area monitoring system, suitable portable alpha and beta-gamma detection instruments and beta-gamma and neutron dose rate instruments shall be provided for use of personnel entering the ,
unit's radiation areas and radioactive materials areas.
- 8. Off-site Environmental Monitorina Stations - At least thirty off-site environmental monitoring stations shall be provided for determining the integrated gamma dose rate in the environs. Each monitoring station shall be equipped with two 10 mr stray radiation chambers and with a film pack.
B. OPERATING LIMITS AND REQUIREMENTS .
- 1. Air Eiector Off-Gas Monitors - At least one of the two air ejector off-gas monitoring systems shall be operable and capable of initiating closure of the off-gas isolation valve whenever there is off-gas flow during power operation. The monitors shall be set to alarm if the off-gas activity reaches a level that would correspond to a stack release rate of 0.05 curies per second and to initiate
! closure of the off-gas isolation valve if the activity reaches a
~ level that would correspond to a stack release rate of 0.5 curies per second and remain at this value (or higher) for 10 minutes. The calibration of these monitors shall be checked at least once each month during power operation. The automatic functions of these monitors shall be checked at least once each quarter during power 4 operation.
- 2. Stack Gas Monitorina System - The stack gas monitoring system shall be operable and capable of initiating the stack gas high radiation level alarm whenever the ventilation system is in operation. It may
. be taken out of service for calibration or maintenance, but shall be returned to service as soon as practicable. The monitors shall be set to alarm at or below the level where the noble gas release rate
, would result in instantaneous offsite concentration of airborne radioactive material equal to the appropriate value given in 10 CFR 20, Appendix B, Table II, column 1.
The calibration of these monitors shall be checked at least once each year. Alarm functions shall be checked weekly for operability.
- The stack particulate filter will normally be removed for laboratory counting on a weekly schedule (sample intervals shall not exceed 200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br />).
- 3. Emeroency Condenser Vent Monitors - At least one of the emergency condenser vent monitors shall be operable and in service during power operation. The monitors shall be set to alarm at 10 mr/hr above background. The calibration of these monitors shall be checked at least once each quarter and the monitors shall be source checked at least once each week 'uring power operation.
AMENDMENT NO.
l I 0820S/0044K
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, VII-3B
- 4. Liould Haste System Vent _ Monitor - The liquid waste system vent monitor shall normally be in service and shall be set to alarm at .10 mr/hr above background.s It may be taken out of service for maintenance purposes but shall be returned to service as soon as i practicable. The liquid waste system vent shall be monitored s routinely using portable instruments when the vent monitor is out of
~:ervice. The calibration of the vent monitor shall be checked at least once each quarter and the monitor shall be source checked at least once each week.
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AhEN'DMENT NO.
0820S/0044K
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