ML20032A078
| ML20032A078 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 09/18/1981 |
| From: | Rausch T COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 8110280263 | |
| Download: ML20032A078 (3) | |
Text
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,h CommonwoeMh Edison 1 PRINCIPAI. STAFF 1 f one First Nabonal Ptsra. CNcago, lihnois g g h&IS v 7 Address Reply to: Post Office Box 767
' Q Chicago, Illinois 60690 D/D PA0 A/D no gtd ti V br&Pr 3
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September 18, 1981 ngpcos piu g r Mr. James G. Keppler, Director q._
Directorate of Inspection and
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Enforcement - Region III
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U.S. Nuclear Regulatory Commission y
s Glen Ellyn, IL 60137 C u.1,0 0 T2 7 IO81 A 'f 799 Roosevelt Road
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Subject:
Quad Cities Station Units 1 and'2 Secondary Capability Test Summary ' N M*/
T Technical Report NRC Dockets 50-254 and 50-265
Dear Mr. Keppler:
Attached in accordance with Section 6.6.C.3 and Table 6.6-1 Area A of Appendix A to DPR-29 and DPR-30, is a summary of the Secondary Containment Leak Rate Test performed for the Quad Cities Station Units. and 2 Reactor Building on September 3, 1981.
This test was performed in accordance with Section 4.7.C.l.c of the Quad Cities Units 1 and 2 Technical Specifications.
This test was performed as part of the Unit 2 pre-outage work, and the results were within the Technical Specifications-requirements.
Very truly yours, d d>~p[{bg Thomas J. Rausch Nuclear Licensing Administrator Boiling Water Reactors cc:
Region III Inspector - Quad Cities lm fh 61 l'
2545N 8110200263 810918' PDR ADOCK 05000254 P
PDR N
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e QUAD-CITIES NUCLEAR POWER STATION UNITS I AND 2 SELONDARY CONTAINMENT LEAK RATE TEST
SUMMARY
INTRODUCTION Prior to the Unit Two Cycle Five Refueling Outage, a Secondary Containment Leak Rate Test was performed on the combined volume of Unit One and Unit Two Secondary Containment Building. The test was performed to demonstrate the ability of the Standby Gas Treatmenc System (SC,GTS) to nalntain a 1/4 inch of water vacuum in both keactor 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.
l SECONDARY CONTAINMENT CAPABILITY TEST The test was conducted with "A" SBGTS train in primary by initiating a "Hi" radiation signal in the Units One and Two Reactor Buildin.g ventilation monitors. This action isolated the ventilation systems, stopping all supply i
and exhaust fans, and started the "A" SBGTS train.
When equilibrium conditions were reached, wall dif ferential 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
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Data on wind speed, wind direction, building Inside and outside temperatures, and dif ferantial 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 conditior:s using flow rates of 0 cfm as t.he " STATIC" reference.
Corrected f ata at the flow rate of 4000 cfm. therefore, gauged the rate at which air was exhausted through the system and the amount of in-leaking to the building.
TEST RESULTS CORRECTED TO ZERO WIND CONDITIONS Filter Train:
"A" Flow Rate:
4000 cfm Building Walt DP (Inches of Water)
North:
-0.26 South:
-0.26 East:
-0.26
- West:
-0.24 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 the calm wind conditions with a filter train flav 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 O
Treatment System.
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SUMMARY
OF TEST DATA September 3, 1981 Quad-Cities 1 and 2 Reactor Building Leak Rate "A" SBGT Train Wall Pressure (Inches of water)
Flow (cfm)
NORTH SOUTH EAST WEST 1.
4000
-0.26
-0.26
-0.26
-0.24 2.
0
-0.00
-0.00
-0.00
-0.00 SUMMAP.Y OF WIND AND TEMPERATURE CONDITIONS
O Temperature (F )
Indoor 110 F 0
Outdoor 70 F
!.h Elevation Above Grade Level Wind Velocity Wind Di rection (Feet)
(MPH)
SW 196 55 2100 I
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