ML20100G589
| ML20100G589 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 03/20/1985 |
| From: | Rybak B COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 9893N, NUDOCS 8504080308 | |
| Download: ML20100G589 (3) | |
Text
.:.x yb Commonwealth Edison one First National Plaza. Chicago, Ithnois Address Reply to: Post Office Box 767 FRIORifY ROUTING Chicago, Illinois 60690 p YN" v
March 20, 1985 Nfi M5I ot 03MA 01 PA0 FILE W Mr. James G. Keppler Regional Administrator U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137
Subject:
Quad Cities Station Units 1 and 2 Secondary Containment Capability Summary Technical Report NRC Docket Nos. 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 1 and 2 Reactor Building on March 6, 1985.
This test was performed in accordance with Section 4.7.C.l.C of the Quad Cities Station Units 1 and 2 Technical Specifications and the results were within the Technical Specification requirements.
If you have any further questions regarding this matter, please contact this office.
Very truly yours, l
/
/
B. R Nuclear Lice ng Administrator 1m cc:
Quad Cities Resident Inspector DN p22 9893N 85040803 5OhhO54
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. Quad-Cities Nuclear Power Station
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nits 1 and 2 Secondary Containment Leak Rate Test Summary
- Introduction J.
Prior to the Unit.Two Cycle Seven Refueling Outage, a Secondary Containment Leak Rate Test'was performed on the combined volume of Unit One T'
. and-Unit-Two-Secondary Containment. Building. The test was performed to
_ demonstrate the ability of-the Standby : Gas. Treatment System (SBGTS) to
- maintain a one-fourth 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.
4 Secondary Containment Capability Test
.The: test was' initiated with 1/2
'A' SBGTS train in primary by
- simulating' a "HI" ' radiation signal in the Unit One or Unit Two Reactor Building ventilation monitors. Insis action isolated the ventilation systems, stopping all supply and exhaust fans, and sta'rted the 1/2
'A' SBGTS train.~ When equilibrium conditions were reached, differential
. pressure readings were taken.- Data was.taken'at the~ conclusion of the-test following shutdown of the :SBGTS and allowing.the building to come to equilibrium with the environs.
4 Test Results Data on wind speed, wind direction, building inside and outside s
temperatures,-and differential building pressures were obtained for a SBCTS flow rate of approximately 4000 cfm on the 1/2 'A' filter train.
The test was conducted at near 'zero wind conditions; therefore, no wind corrections were. required.
- Test Results Corrected to Zero Wind Conditions Filter Train:: 1/2
'A' Building Wall Dp: North:
-0.260
- Flow Rate:
4000 cfm (Inches of _ Water) South:
-0.275 East:
-0.250 West:
-0.250 Average: -0.259 r
The results of the test indicate that the SBGTS is' capable of maintaining
- one-fourth ' inch of water. vacuum under the calm wind conditions with a filter
. train flow rate of no more than 4000 cfm. Average building differential pressure for the train results in -0.259 inches of water, indicating
. adequate performance of the Secondary Containment and Standby Gas Treat-ment System.
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..g(*i Summary of Test Data March 6, 1985 L
P
, Quad-Cities 1 & 2 Reactor Building Leak Rate 1/2 ' A' SBGT Train Wall Pressure (Inches of Water)
-Flow (cfm)
North South East West 1.'
4000
-0.260
-0.275
-0.250
-0.250 2.
O'
+0.00
+0.00-
+0.00
+0.00 Summary of Wind and Temperature Conditions 1
Temperature ' (FO)
~
Indoor
-78 F
. Outdoor 170F Elevation Above Grade Level Wind Velocity Wind Direction (Feet)
(MPil)
E 1
196 0
95 T
4
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