ML19263D210

Secondary Containment Leak Test Rept.Concludes Standby Gas Treatment Sys Maintains 1/4 Inch of Water Vacuum in Secondary Containment Bldg Under Calm Conditions W/Flow Rate No Higher than 4,000 Cfm

ML19263D210
Person / Time
Site:	Quad Cities
Issue date:	03/06/1979
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML19263D209	List: ML19263D208 ML19263D210
References
NUDOCS 7903260287
Download: ML19263D210 (2)

Text

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QUAD-CITIES NUCLEAR POWER STATOW UNITS 1 and 2 -

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3 5ECONDARY CONTAINMENT LEAK RATE TEST

SUMMARY

o INTRODUCTION Prior to the Unit 1 Cycle Four refueling outage, a secondary containment leak rate test was performed on the canbined volume of Unit I and Unit 2 secondary containment building. The test was performed to demonstrate the abil'ity of the standby gas treatment system (SBGTS) to maintain a i inch of water vacuum in both reactor buildings simultancously with a filter train flow rate of not more than 4000 cfm.

The test was conducted with a local flow Indication of 4000 cfm.

SECONDARY CONTAINMENT CAPABILITY TEST The test was conducted with "B" SBGTS train in primary by initiating a "Hi" radiation signal in the Units 1 and 2 reactor building ventilation monitors. This action isolated the ventilation systems, stopping all supply and exhaust fans, and started the "B" SBGTS train. When equilibrium conditions were reached, wall differential pressure readings were taken. "ZERO WIND" data was taken following shutdown of the SBGTS and allowing the building to come to equilibrium with the environs.

TEST RESULTS Data on wind speed, wind direction, building Inside and outside temperatures, and differential building pressures were obtained at a standby gas treatment system flow rate of approximately 4000 cfm on the "B" filter train.

The results of the test were corrected to zero wind conditions using flow rates of "0" cfm as the " STATIC" reference. Corrected data at the flow rate of 4000 cfm, therefore, gaged the rate at which air was exhausted through the system and the amount of in-leakage to the building.

TEST RESULTS CORRECTED TO ZERO WIND CONDITIONS Filter Train "B" Flow Rate: 4000 CFM Building Wall DPS (Inches of Water)

NORTH: -QJ8 SOUTH: - 0. '.5 EAST: -0.29 WEST: -0.20 AVERAGE: -0.255 J The results of the test indicate that the standby gas treatment filter train is capable of maintaining 41nch of water vacuum under calm wind conditions with a' filter train flow rate of no more than 4000 cfm. Average building differential pressure for the train results in -0.255 inches of water, indicating adequate performance of the secondary cwatainment and standby tas treatment system.

7903260287 .

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SUMMARY

OF TEST DATA January 12, 1979 QUAD-C.lTIES 1 and 2 Reactor Building Leak Rate i "B" SBGT TRAIN Flow (cfm) Wall Pressure (inches of water)

North South East . West

1. 4000- -0.28 -0.25 -0.29 -0.20

2. 0 -0.00 -0.00 -0.00 -0.00

SUMMARY

OF WIND AND TEMPERATURE CONDITIONS Temperature (of) 0 Indoor 73 Outdoor 17 ELEVATION AB0VE GRADE LEVEL WIND VELOCITY WIND DIRECTION

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(Feet) (MPH)

. - 125 - 4 East (90 )

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