ML19257D157
| ML19257D157 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 12/31/1979 |
| From: | COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML19257D156 | List: |
| References | |
| NUDOCS 8002010401 | |
| Download: ML19257D157 (2) | |
Text
1 QUAD-CITIES NUCLEAR POWER STATION UNITS 1 AND 2 SECONDARY CONTAlimENT LEAK RATE 'lES1
SUMMARY
INTRODUCTION Prior to the Unit 2 Cycle Four refueling outage, a secondarv containment leak rate test was performed on the combined volume of Unit I cnd Unit 2 secondary containm:nt building.
The test was pe rformed to demont trate the ability of the standby gas treatment system (SBGTS) to maintain a 1/4 inch of water vacuum in both reactor buildings simultaneously 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 "A" 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 "A" SBGTS train.
When equilibrium conditions were reached, wall differential pressure readings were taken.
"ZERO WIN]" data wcs taken follo..ing shutdown of the SBGTS and allowing the building to cone to equilibrium with the environs.
TEST RESULTS Data on uind speed, wind direction, building inside and outside temperatures, and differential building pressures were obtained at a SBGTS flow rate of approximately 4000 cfm on the "A" 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, thereform, gauged the rate at which air was exhausted through the system and the amount of in-leakage to the building.
TEST RESULTS CORRECTED 10 ZERO Wlic CONDill0NS Filter Train:
"A" Flow Rate:
4000 cfm Building Wall DP (inches of Water)
North:
- 0. 21, South:
-0.28 East:
-0.28 West:
-0.22 Average:
-0.255 The results of the test indicate that the standby gas treatment filter train is capable of maintaining 1/4 inch 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 containment and standby gas treatment system.
1855 002
~
0W 300201
SUMMARY
OF TEST DATA flovember 21, 1979 QUAD-CITIES I and 2 Reactor Building Leak Rate "A" SBGT TRAIN Flow (cfm)
Wall Pressure (inches of water) llor t h South East West 1.
4000
-0.24
-0.28
-0.28'
-0.22 2.
0
-0.00
-0.00
-0.00
-0.00 i
SUMMARY
OF WillD AMD TEMPERATURI CONDITIONS Temperature ( F)
Indoor 82 F Outdoor 570F.
Elevation Abov3 Grade Level Wind Velccity Wind Direction (mph)
(Feet i 196 11 SE (151 )
18So5 003