ML19341C620
| ML19341C620 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 02/18/1981 |
| From: | DAIRYLAND POWER COOPERATIVE |
| To: | |
| Shared Package | |
| ML19341C612 | List: |
| References | |
| NUDOCS 8103030840 | |
| Download: ML19341C620 (4) | |
Text
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PLANT SYSTEMS 4/5.2.21 EMERGENCY SERVICE WATER SUPPLY' SYSTEM LIMITING CONDITION FOR OPERATION 4.2.21.1 The Emergency Service Water Supply System shall be OPERABLE, with:
At least three portable gasoline engine-driven pumps connected in a.
parallel and capable of delivering a combined flow of 900 gpm against-a pressure of 50 psig within the reactor vessel.
b.
An operable flow path from the Mississippi River, consisting of pump suction and discharge hoses, a three-way ball valve distributor, and relay hoses capable of transfering water to a valved inlet manifold into the High Pressure Service Water piping system.
APPLICABILITY:
Operational Conditions 1, 2 and 3
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ACTION:
With only 2 pumps OPERABLE, restore the inoperable equipment to a.
OPERABLE status within twenty-four (24) hours and submit a report i
in accordance with Specification 3.9.2.
b.
With the ESWSS otherwise not OPERABLE:
1.
Verify OPERABLE status of the High Pressure Service Water Fire Suppression Water System per Sections 5.2.18.1.1.a and 5.2.18.1.2.a within twenty-four (24) houts.and 2.
Restore the ESWSS to OPERABLE status with at least three pumps within seven (7) days or be in at least H0T SHUTDOWN within the next twelve (12) hours and in COLD SHUTDOWN within the following twenty-four (24) hours.
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3.
Submit a report in accordance with Specification 3.9.2.
1 4.
If 1 above cannot be satisfied, place the reactor in HOT SHUTDOWN within the next twelve (12) hours and in COLD SHUTDOWN within the following twenty-four (24) hours.
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370 PLANT SYSTEMS SURVEILLANCE REOUIREMENTS 5.2.21.1.1 The Emergency Service Water Supply System shall be demonstrated OPERABLE:
At least once per 31 days by verifying that each manual or automatic a.
valve in the flow path that is not locked, sealed, or otherwise secured in position is in its correct position.
b.
At least once per 12 months by cycling each testable valve in the flow path through at least once complete cycle of full travel, At least once per 18 months, durina reactor shutdown, by cerforming an c.
inteorated system test which directs coolant flow through the Alternate Core Spray System test loop and back to the river.
1.
Verifying that the combined pump output develops 900 ppm at a minimum system test pressure of 90 psia, d.
At least once per 18 months, by performinc a drill which assembles the system under simulated emergency conditions.
5.2.21.1.2 Each Erergency Service Water Supply System gasoline engine driven Sump shall be demonstrated OPERABLE:
a.
At least once per 7 days by verifying an acceptable built-in battery hydrometer indication, and voltage > 12 volts.
b.
.At least once per 31 days by verifying that the fuel tank contains at least 5.0 U.S. gallons of gasoline, and that the crankcase oil is at a safe level, c.
At least once per 6 months on a STAGGERED TEST BASIS by starting an enoine/ pump unit from ambient conditions and operating at least 20 minutes with pump load.
d.
At least once per 92 days by verifying that the fuel tank has been drained and replenished with fresh fuel, e.
At least once per 6 nonths, by performing inspection and raintenance in accordance with written procedures.
f.
At least once per 18 months, by performing inspection and maintenance in accordance with written procedures.
37p PLANT SYSTEMS SURVEILLANCE REOUIREMENTS 5.2.21.1.3 Each Emergency Service Water Supply Systems pump suction hose shall be demonstrated OPEP/BLE:
a.
At lecst once per 12 months, by testing the pump suction hoses and couplings at a pressure 3_ 50 psig, and visually inspecting for damage and abnormal wear.
5.2.21.1.4 Each Emergency Service Water Supply Systems Pelay hose, pump discharge hose, and the 3-way distributor shall be demonstrated OPERABLE:
a.
At least once per 12 months, by testing the 5" relay hoses and couplings at a pressure 2. 225 psig and visually inspecting for damage and abnormal wear.
b.
At least once per 12 months, by testing the pump 3" discharge hoses and couplings at a pressore 3.225 psig and visually inspecting for damage end abnormal wear, c.
At least once per 12 months, by testing the 3-way distributor and couplings at a pressure 3,225 psig and visually inspecting for damage and abnormal wear.
d.
At least once per 12 months, by verifying that each 3-way distributor ball valve has been cycled through at least one complete cycle of full travel.
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37q PLANT SYSTEMS BASES 4/S.2.21 EMERGENCY SERVICE WATER SUPPLY SYSTEM The Emergency Service Water Supply System is designed to supply an additional alternate cooling sot.rce to the reactor.
This backup water source is necessary because of the review of site liquefaction potential during seismic events.
The system enhances the safety factor in a seismic event where free field liquefaction at the Safe Shutdown Earthouake may, according to the results of this review, cause failure of the Crib House structure and the underground high pressure service water piping connecting 'the Crib House to the Turbine Building.
The system consists of isolation valves to truncate the potentially damaged systems inside the Turbine Building, thus closing the pathway to seismically damaged piping, portable pumps capable of drawing a suction from the Mississippi River and the necessary hoses and hardware to connect the pumps to the Turbine Building piping, either inside the building or from the outside.
The system is capable of supplying 900 gpm flow rate against a 50 psig reactor pressure.
The system installed piping can supply water to the High Pressure Core Spray System, the Alternate Core Spray System, the Fire Suppression Systems, the Shutdown Condenser and the Lcw Pressure Service Water System (which is the ultimate heat sink for decay heat).
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